Commit | Line | Data |
---|---|---|
0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
0756eb3c PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | #include "../exim.h" | |
9 | #include "smtp.h" | |
10 | ||
14ca5d2a JH |
11 | #if defined(SUPPORT_DANE) && defined(DISABLE_TLS) |
12 | # error TLS is required for DANE | |
13 | #endif | |
14 | ||
0756eb3c PH |
15 | |
16 | /* Options specific to the smtp transport. This transport also supports LMTP | |
17 | over TCP/IP. The options must be in alphabetic order (note that "_" comes | |
18 | before the lower case letters). Some live in the transport_instance block so as | |
19 | to be publicly visible; these are flagged with opt_public. */ | |
20 | ||
21 | optionlist smtp_transport_options[] = { | |
506900af JH |
22 | { "*expand_multi_domain", opt_stringptr | opt_hidden | opt_public, |
23 | (void *)offsetof(transport_instance, expand_multi_domain) }, | |
9c695f6d JH |
24 | { "*expand_retry_include_ip_address", opt_stringptr | opt_hidden, |
25 | (void *)(offsetof(smtp_transport_options_block, expand_retry_include_ip_address)) }, | |
26 | ||
48c7f9e2 PH |
27 | { "address_retry_include_sender", opt_bool, |
28 | (void *)offsetof(smtp_transport_options_block, address_retry_include_sender) }, | |
0756eb3c PH |
29 | { "allow_localhost", opt_bool, |
30 | (void *)offsetof(smtp_transport_options_block, allow_localhost) }, | |
617d3932 JH |
31 | #ifdef EXPERIMENTAL_ARC |
32 | { "arc_sign", opt_stringptr, | |
33 | (void *)offsetof(smtp_transport_options_block, arc_sign) }, | |
34 | #endif | |
0756eb3c PH |
35 | { "authenticated_sender", opt_stringptr, |
36 | (void *)offsetof(smtp_transport_options_block, authenticated_sender) }, | |
382afc6b PH |
37 | { "authenticated_sender_force", opt_bool, |
38 | (void *)offsetof(smtp_transport_options_block, authenticated_sender_force) }, | |
0756eb3c PH |
39 | { "command_timeout", opt_time, |
40 | (void *)offsetof(smtp_transport_options_block, command_timeout) }, | |
41 | { "connect_timeout", opt_time, | |
42 | (void *)offsetof(smtp_transport_options_block, connect_timeout) }, | |
43 | { "connection_max_messages", opt_int | opt_public, | |
44 | (void *)offsetof(transport_instance, connection_max_messages) }, | |
5ec37a55 PP |
45 | # ifdef SUPPORT_DANE |
46 | { "dane_require_tls_ciphers", opt_stringptr, | |
47 | (void *)offsetof(smtp_transport_options_block, dane_require_tls_ciphers) }, | |
48 | # endif | |
0756eb3c PH |
49 | { "data_timeout", opt_time, |
50 | (void *)offsetof(smtp_transport_options_block, data_timeout) }, | |
51 | { "delay_after_cutoff", opt_bool, | |
52 | (void *)offsetof(smtp_transport_options_block, delay_after_cutoff) }, | |
80a47a2c | 53 | #ifndef DISABLE_DKIM |
f7572e5a | 54 | { "dkim_canon", opt_stringptr, |
ff5aac2b | 55 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_canon) }, |
f7572e5a | 56 | { "dkim_domain", opt_stringptr, |
ff5aac2b | 57 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_domain) }, |
d73e45df JH |
58 | { "dkim_hash", opt_stringptr, |
59 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_hash) }, | |
7c6ec81b JH |
60 | { "dkim_identity", opt_stringptr, |
61 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_identity) }, | |
f7572e5a | 62 | { "dkim_private_key", opt_stringptr, |
ff5aac2b | 63 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_private_key) }, |
f7572e5a | 64 | { "dkim_selector", opt_stringptr, |
ff5aac2b | 65 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_selector) }, |
f7572e5a | 66 | { "dkim_sign_headers", opt_stringptr, |
ff5aac2b | 67 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_sign_headers) }, |
f7572e5a | 68 | { "dkim_strict", opt_stringptr, |
ff5aac2b | 69 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_strict) }, |
2bc0f45e JH |
70 | { "dkim_timestamps", opt_stringptr, |
71 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_timestamps) }, | |
80a47a2c | 72 | #endif |
0756eb3c PH |
73 | { "dns_qualify_single", opt_bool, |
74 | (void *)offsetof(smtp_transport_options_block, dns_qualify_single) }, | |
75 | { "dns_search_parents", opt_bool, | |
76 | (void *)offsetof(smtp_transport_options_block, dns_search_parents) }, | |
578897ea | 77 | { "dnssec_request_domains", opt_stringptr, |
7cd171b7 | 78 | (void *)offsetof(smtp_transport_options_block, dnssec.request) }, |
578897ea | 79 | { "dnssec_require_domains", opt_stringptr, |
7cd171b7 | 80 | (void *)offsetof(smtp_transport_options_block, dnssec.require) }, |
9e4f5962 PP |
81 | { "dscp", opt_stringptr, |
82 | (void *)offsetof(smtp_transport_options_block, dscp) }, | |
0756eb3c PH |
83 | { "fallback_hosts", opt_stringptr, |
84 | (void *)offsetof(smtp_transport_options_block, fallback_hosts) }, | |
85 | { "final_timeout", opt_time, | |
86 | (void *)offsetof(smtp_transport_options_block, final_timeout) }, | |
87 | { "gethostbyname", opt_bool, | |
88 | (void *)offsetof(smtp_transport_options_block, gethostbyname) }, | |
89 | { "helo_data", opt_stringptr, | |
90 | (void *)offsetof(smtp_transport_options_block, helo_data) }, | |
91 | { "hosts", opt_stringptr, | |
92 | (void *)offsetof(smtp_transport_options_block, hosts) }, | |
93 | { "hosts_avoid_esmtp", opt_stringptr, | |
94 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_esmtp) }, | |
c51b8e75 PH |
95 | { "hosts_avoid_pipelining", opt_stringptr, |
96 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_pipelining) }, | |
01603eec | 97 | #ifndef DISABLE_TLS |
0756eb3c PH |
98 | { "hosts_avoid_tls", opt_stringptr, |
99 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_tls) }, | |
80a47a2c | 100 | #endif |
0756eb3c PH |
101 | { "hosts_max_try", opt_int, |
102 | (void *)offsetof(smtp_transport_options_block, hosts_max_try) }, | |
533244af PH |
103 | { "hosts_max_try_hardlimit", opt_int, |
104 | (void *)offsetof(smtp_transport_options_block, hosts_max_try_hardlimit) }, | |
01603eec | 105 | #ifndef DISABLE_TLS |
0756eb3c PH |
106 | { "hosts_nopass_tls", opt_stringptr, |
107 | (void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) }, | |
875512a3 JH |
108 | { "hosts_noproxy_tls", opt_stringptr, |
109 | (void *)offsetof(smtp_transport_options_block, hosts_noproxy_tls) }, | |
80a47a2c | 110 | #endif |
0756eb3c PH |
111 | { "hosts_override", opt_bool, |
112 | (void *)offsetof(smtp_transport_options_block, hosts_override) }, | |
4e48d56c | 113 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
114 | { "hosts_pipe_connect", opt_stringptr, |
115 | (void *)offsetof(smtp_transport_options_block, hosts_pipe_connect) }, | |
116 | #endif | |
0756eb3c PH |
117 | { "hosts_randomize", opt_bool, |
118 | (void *)offsetof(smtp_transport_options_block, hosts_randomize) }, | |
01603eec | 119 | #if !defined(DISABLE_TLS) && !defined(DISABLE_OCSP) |
44662487 JH |
120 | { "hosts_request_ocsp", opt_stringptr, |
121 | (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) }, | |
122 | #endif | |
0756eb3c PH |
123 | { "hosts_require_auth", opt_stringptr, |
124 | (void *)offsetof(smtp_transport_options_block, hosts_require_auth) }, | |
01603eec | 125 | #ifndef DISABLE_TLS |
c0635b6d | 126 | # ifdef SUPPORT_DANE |
7a31d643 JH |
127 | { "hosts_require_dane", opt_stringptr, |
128 | (void *)offsetof(smtp_transport_options_block, hosts_require_dane) }, | |
129 | # endif | |
f2de3a33 | 130 | # ifndef DISABLE_OCSP |
f5d78688 JH |
131 | { "hosts_require_ocsp", opt_stringptr, |
132 | (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) }, | |
133 | # endif | |
0756eb3c PH |
134 | { "hosts_require_tls", opt_stringptr, |
135 | (void *)offsetof(smtp_transport_options_block, hosts_require_tls) }, | |
80a47a2c | 136 | #endif |
0756eb3c PH |
137 | { "hosts_try_auth", opt_stringptr, |
138 | (void *)offsetof(smtp_transport_options_block, hosts_try_auth) }, | |
f98442df JH |
139 | { "hosts_try_chunking", opt_stringptr, |
140 | (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) }, | |
21ee816d | 141 | #ifdef SUPPORT_DANE |
96e47838 TL |
142 | { "hosts_try_dane", opt_stringptr, |
143 | (void *)offsetof(smtp_transport_options_block, hosts_try_dane) }, | |
144 | #endif | |
fb05276a JH |
145 | { "hosts_try_fastopen", opt_stringptr, |
146 | (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) }, | |
8ccd00b1 | 147 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
148 | { "hosts_try_prdr", opt_stringptr, |
149 | (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) }, | |
150 | #endif | |
01603eec | 151 | #ifndef DISABLE_TLS |
99400968 JH |
152 | { "hosts_verify_avoid_tls", opt_stringptr, |
153 | (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) }, | |
154 | #endif | |
0756eb3c PH |
155 | { "interface", opt_stringptr, |
156 | (void *)offsetof(smtp_transport_options_block, interface) }, | |
157 | { "keepalive", opt_bool, | |
158 | (void *)offsetof(smtp_transport_options_block, keepalive) }, | |
f1513293 PH |
159 | { "lmtp_ignore_quota", opt_bool, |
160 | (void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) }, | |
0756eb3c PH |
161 | { "max_rcpt", opt_int | opt_public, |
162 | (void *)offsetof(transport_instance, max_addresses) }, | |
506900af | 163 | { "multi_domain", opt_expand_bool | opt_public, |
0756eb3c PH |
164 | (void *)offsetof(transport_instance, multi_domain) }, |
165 | { "port", opt_stringptr, | |
166 | (void *)offsetof(smtp_transport_options_block, port) }, | |
167 | { "protocol", opt_stringptr, | |
168 | (void *)offsetof(smtp_transport_options_block, protocol) }, | |
9c695f6d | 169 | { "retry_include_ip_address", opt_expand_bool, |
0756eb3c PH |
170 | (void *)offsetof(smtp_transport_options_block, retry_include_ip_address) }, |
171 | { "serialize_hosts", opt_stringptr, | |
172 | (void *)offsetof(smtp_transport_options_block, serialize_hosts) }, | |
173 | { "size_addition", opt_int, | |
1ddf77d0 | 174 | (void *)offsetof(smtp_transport_options_block, size_addition) }, |
f0989ec0 | 175 | #ifdef SUPPORT_SOCKS |
1ddf77d0 JH |
176 | { "socks_proxy", opt_stringptr, |
177 | (void *)offsetof(smtp_transport_options_block, socks_proxy) }, | |
7eb6c37c | 178 | #endif |
01603eec | 179 | #ifndef DISABLE_TLS |
1ddf77d0 | 180 | { "tls_certificate", opt_stringptr, |
0756eb3c PH |
181 | (void *)offsetof(smtp_transport_options_block, tls_certificate) }, |
182 | { "tls_crl", opt_stringptr, | |
183 | (void *)offsetof(smtp_transport_options_block, tls_crl) }, | |
54c90be1 PP |
184 | { "tls_dh_min_bits", opt_int, |
185 | (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) }, | |
0756eb3c PH |
186 | { "tls_privatekey", opt_stringptr, |
187 | (void *)offsetof(smtp_transport_options_block, tls_privatekey) }, | |
3f0945ff | 188 | { "tls_require_ciphers", opt_stringptr, |
0756eb3c | 189 | (void *)offsetof(smtp_transport_options_block, tls_require_ciphers) }, |
b10c87b3 JH |
190 | # ifdef EXPERIMENTAL_TLS_RESUME |
191 | { "tls_resumption_hosts", opt_stringptr, | |
192 | (void *)offsetof(smtp_transport_options_block, tls_resumption_hosts) }, | |
193 | # endif | |
3f0945ff PP |
194 | { "tls_sni", opt_stringptr, |
195 | (void *)offsetof(smtp_transport_options_block, tls_sni) }, | |
0756eb3c PH |
196 | { "tls_tempfail_tryclear", opt_bool, |
197 | (void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) }, | |
a63be306 WB |
198 | { "tls_try_verify_hosts", opt_stringptr, |
199 | (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) }, | |
e51c7be2 JH |
200 | { "tls_verify_cert_hostnames", opt_stringptr, |
201 | (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)}, | |
0756eb3c | 202 | { "tls_verify_certificates", opt_stringptr, |
a63be306 WB |
203 | (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) }, |
204 | { "tls_verify_hosts", opt_stringptr, | |
71c15846 JH |
205 | (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) }, |
206 | #endif | |
207 | #ifdef SUPPORT_I18N | |
208 | { "utf8_downconvert", opt_stringptr, | |
209 | (void *)offsetof(smtp_transport_options_block, utf8_downconvert) }, | |
80a47a2c | 210 | #endif |
0756eb3c PH |
211 | }; |
212 | ||
213 | /* Size of the options list. An extern variable has to be used so that its | |
214 | address can appear in the tables drtables.c. */ | |
215 | ||
71c15846 | 216 | int smtp_transport_options_count = nelem(smtp_transport_options); |
0756eb3c | 217 | |
d185889f JH |
218 | |
219 | #ifdef MACRO_PREDEF | |
220 | ||
221 | /* Dummy values */ | |
222 | smtp_transport_options_block smtp_transport_option_defaults = {0}; | |
223 | void smtp_transport_init(transport_instance *tblock) {} | |
224 | BOOL smtp_transport_entry(transport_instance *tblock, address_item *addr) {return FALSE;} | |
225 | void smtp_transport_closedown(transport_instance *tblock) {} | |
226 | ||
227 | #else /*!MACRO_PREDEF*/ | |
228 | ||
229 | ||
0756eb3c PH |
230 | /* Default private options block for the smtp transport. */ |
231 | ||
232 | smtp_transport_options_block smtp_transport_option_defaults = { | |
838d897c | 233 | .hosts = NULL, |
847cd15f | 234 | .fallback_hosts = NULL, |
838d897c JH |
235 | .hostlist = NULL, |
236 | .fallback_hostlist = NULL, | |
838d897c JH |
237 | .helo_data = US"$primary_hostname", |
238 | .interface = NULL, | |
239 | .port = NULL, | |
240 | .protocol = US"smtp", | |
241 | .dscp = NULL, | |
242 | .serialize_hosts = NULL, | |
243 | .hosts_try_auth = NULL, | |
244 | .hosts_require_auth = NULL, | |
245 | .hosts_try_chunking = US"*", | |
c0635b6d | 246 | #ifdef SUPPORT_DANE |
59c0959a | 247 | .hosts_try_dane = US"*", |
838d897c | 248 | .hosts_require_dane = NULL, |
5ec37a55 | 249 | .dane_require_tls_ciphers = NULL, |
96e47838 | 250 | #endif |
efad2f41 | 251 | .hosts_try_fastopen = US"*", |
8ccd00b1 | 252 | #ifndef DISABLE_PRDR |
838d897c | 253 | .hosts_try_prdr = US"*", |
f5d78688 | 254 | #endif |
f2de3a33 | 255 | #ifndef DISABLE_OCSP |
838d897c JH |
256 | .hosts_request_ocsp = US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */ |
257 | .hosts_require_ocsp = NULL, | |
fd98a5c6 | 258 | #endif |
838d897c JH |
259 | .hosts_require_tls = NULL, |
260 | .hosts_avoid_tls = NULL, | |
261 | .hosts_verify_avoid_tls = NULL, | |
262 | .hosts_avoid_pipelining = NULL, | |
4e48d56c | 263 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
264 | .hosts_pipe_connect = NULL, |
265 | #endif | |
838d897c | 266 | .hosts_avoid_esmtp = NULL, |
01603eec | 267 | #ifndef DISABLE_TLS |
838d897c | 268 | .hosts_nopass_tls = NULL, |
96eb7d2a | 269 | .hosts_noproxy_tls = NULL, |
57cc2785 | 270 | #endif |
838d897c JH |
271 | .command_timeout = 5*60, |
272 | .connect_timeout = 5*60, | |
273 | .data_timeout = 5*60, | |
274 | .final_timeout = 10*60, | |
275 | .size_addition = 1024, | |
276 | .hosts_max_try = 5, | |
277 | .hosts_max_try_hardlimit = 50, | |
278 | .address_retry_include_sender = TRUE, | |
279 | .allow_localhost = FALSE, | |
280 | .authenticated_sender_force = FALSE, | |
281 | .gethostbyname = FALSE, | |
282 | .dns_qualify_single = TRUE, | |
283 | .dns_search_parents = FALSE, | |
ab0e957b | 284 | .dnssec = { .request= US"*", .require=NULL }, |
838d897c JH |
285 | .delay_after_cutoff = TRUE, |
286 | .hosts_override = FALSE, | |
287 | .hosts_randomize = FALSE, | |
288 | .keepalive = TRUE, | |
289 | .lmtp_ignore_quota = FALSE, | |
290 | .expand_retry_include_ip_address = NULL, | |
291 | .retry_include_ip_address = TRUE, | |
f0989ec0 | 292 | #ifdef SUPPORT_SOCKS |
838d897c | 293 | .socks_proxy = NULL, |
b8bf753b | 294 | #endif |
01603eec | 295 | #ifndef DISABLE_TLS |
838d897c JH |
296 | .tls_certificate = NULL, |
297 | .tls_crl = NULL, | |
298 | .tls_privatekey = NULL, | |
299 | .tls_require_ciphers = NULL, | |
300 | .tls_sni = NULL, | |
301 | .tls_verify_certificates = US"system", | |
302 | .tls_dh_min_bits = EXIM_CLIENT_DH_DEFAULT_MIN_BITS, | |
303 | .tls_tempfail_tryclear = TRUE, | |
b10c87b3 JH |
304 | # ifdef EXPERIMENTAL_TLS_RESUME |
305 | .tls_resumption_hosts = NULL, | |
306 | # endif | |
838d897c JH |
307 | .tls_verify_hosts = NULL, |
308 | .tls_try_verify_hosts = US"*", | |
309 | .tls_verify_cert_hostnames = US"*", | |
80a47a2c | 310 | #endif |
71c15846 JH |
311 | #ifdef SUPPORT_I18N |
312 | .utf8_downconvert = NULL, | |
313 | #endif | |
80a47a2c | 314 | #ifndef DISABLE_DKIM |
838d897c JH |
315 | .dkim = |
316 | {.dkim_domain = NULL, | |
7c6ec81b | 317 | .dkim_identity = NULL, |
838d897c JH |
318 | .dkim_private_key = NULL, |
319 | .dkim_selector = NULL, | |
320 | .dkim_canon = NULL, | |
7c6ec81b | 321 | .dkim_sign_headers = NULL, |
838d897c | 322 | .dkim_strict = NULL, |
d73e45df | 323 | .dkim_hash = US"sha256", |
2bc0f45e | 324 | .dkim_timestamps = NULL, |
617d3932 JH |
325 | .dot_stuffed = FALSE, |
326 | .force_bodyhash = FALSE, | |
327 | # ifdef EXPERIMENTAL_ARC | |
328 | .arc_signspec = NULL, | |
329 | # endif | |
330 | }, | |
331 | # ifdef EXPERIMENTAL_ARC | |
332 | .arc_sign = NULL, | |
333 | # endif | |
80a47a2c | 334 | #endif |
0756eb3c PH |
335 | }; |
336 | ||
6c1c3d1d WB |
337 | /* some DSN flags for use later */ |
338 | ||
339 | static int rf_list[] = {rf_notify_never, rf_notify_success, | |
340 | rf_notify_failure, rf_notify_delay }; | |
341 | ||
45500060 | 342 | static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" }; |
6c1c3d1d WB |
343 | |
344 | ||
0756eb3c PH |
345 | |
346 | /* Local statics */ | |
347 | ||
87cb4a16 JH |
348 | static uschar *smtp_command; /* Points to last cmd for error messages */ |
349 | static uschar *mail_command; /* Points to MAIL cmd for error messages */ | |
350 | static uschar *data_command = US""; /* Points to DATA cmd for error messages */ | |
351 | static BOOL update_waiting; /* TRUE to update the "wait" database */ | |
875512a3 JH |
352 | |
353 | /*XXX move to smtp_context */ | |
87cb4a16 | 354 | static BOOL pipelining_active; /* current transaction is in pipe mode */ |
0756eb3c PH |
355 | |
356 | ||
ee8b8090 JH |
357 | static unsigned ehlo_response(uschar * buf, unsigned checks); |
358 | ||
359 | ||
0756eb3c PH |
360 | /************************************************* |
361 | * Setup entry point * | |
362 | *************************************************/ | |
363 | ||
364 | /* This function is called when the transport is about to be used, | |
365 | but before running it in a sub-process. It is used for two things: | |
366 | ||
367 | (1) To set the fallback host list in addresses, when delivering. | |
26da7e20 PH |
368 | (2) To pass back the interface, port, protocol, and other options, for use |
369 | during callout verification. | |
0756eb3c PH |
370 | |
371 | Arguments: | |
372 | tblock pointer to the transport instance block | |
373 | addrlist list of addresses about to be transported | |
374 | tf if not NULL, pointer to block in which to return options | |
929ba01c PH |
375 | uid the uid that will be set (not used) |
376 | gid the gid that will be set (not used) | |
0756eb3c PH |
377 | errmsg place for error message (not used) |
378 | ||
379 | Returns: OK always (FAIL, DEFER not used) | |
380 | */ | |
381 | ||
382 | static int | |
383 | smtp_transport_setup(transport_instance *tblock, address_item *addrlist, | |
929ba01c | 384 | transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg) |
0756eb3c | 385 | { |
ee8b8090 | 386 | smtp_transport_options_block *ob = SOB tblock->options_block; |
0756eb3c PH |
387 | |
388 | errmsg = errmsg; /* Keep picky compilers happy */ | |
929ba01c PH |
389 | uid = uid; |
390 | gid = gid; | |
0756eb3c PH |
391 | |
392 | /* Pass back options if required. This interface is getting very messy. */ | |
393 | ||
02b41d71 | 394 | if (tf) |
0756eb3c PH |
395 | { |
396 | tf->interface = ob->interface; | |
397 | tf->port = ob->port; | |
398 | tf->protocol = ob->protocol; | |
399 | tf->hosts = ob->hosts; | |
400 | tf->hosts_override = ob->hosts_override; | |
401 | tf->hosts_randomize = ob->hosts_randomize; | |
402 | tf->gethostbyname = ob->gethostbyname; | |
403 | tf->qualify_single = ob->dns_qualify_single; | |
404 | tf->search_parents = ob->dns_search_parents; | |
26da7e20 | 405 | tf->helo_data = ob->helo_data; |
0756eb3c PH |
406 | } |
407 | ||
408 | /* Set the fallback host list for all the addresses that don't have fallback | |
409 | host lists, provided that the local host wasn't present in the original host | |
410 | list. */ | |
411 | ||
412 | if (!testflag(addrlist, af_local_host_removed)) | |
02b41d71 JH |
413 | for (; addrlist; addrlist = addrlist->next) |
414 | if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist; | |
0756eb3c PH |
415 | |
416 | return OK; | |
417 | } | |
418 | ||
419 | ||
420 | ||
421 | /************************************************* | |
422 | * Initialization entry point * | |
423 | *************************************************/ | |
424 | ||
425 | /* Called for each instance, after its options have been read, to | |
426 | enable consistency checks to be done, or anything else that needs | |
427 | to be set up. | |
428 | ||
429 | Argument: pointer to the transport instance block | |
430 | Returns: nothing | |
431 | */ | |
432 | ||
433 | void | |
434 | smtp_transport_init(transport_instance *tblock) | |
435 | { | |
ee8b8090 | 436 | smtp_transport_options_block *ob = SOB tblock->options_block; |
0756eb3c PH |
437 | |
438 | /* Retry_use_local_part defaults FALSE if unset */ | |
439 | ||
440 | if (tblock->retry_use_local_part == TRUE_UNSET) | |
441 | tblock->retry_use_local_part = FALSE; | |
442 | ||
443 | /* Set the default port according to the protocol */ | |
444 | ||
ee8b8090 JH |
445 | if (!ob->port) |
446 | ob->port = strcmpic(ob->protocol, US"lmtp") == 0 | |
447 | ? US"lmtp" | |
448 | : strcmpic(ob->protocol, US"smtps") == 0 | |
449 | ? US"smtps" : US"smtp"; | |
0756eb3c PH |
450 | |
451 | /* Set up the setup entry point, to be called before subprocesses for this | |
452 | transport. */ | |
453 | ||
454 | tblock->setup = smtp_transport_setup; | |
455 | ||
456 | /* Complain if any of the timeouts are zero. */ | |
457 | ||
458 | if (ob->command_timeout <= 0 || ob->data_timeout <= 0 || | |
459 | ob->final_timeout <= 0) | |
460 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
461 | "command, data, or final timeout value is zero for %s transport", | |
462 | tblock->name); | |
463 | ||
464 | /* If hosts_override is set and there are local hosts, set the global | |
465 | flag that stops verify from showing router hosts. */ | |
466 | ||
467 | if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE; | |
468 | ||
469 | /* If there are any fallback hosts listed, build a chain of host items | |
470 | for them, but do not do any lookups at this time. */ | |
471 | ||
472 | host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE); | |
473 | } | |
474 | ||
475 | ||
476 | ||
477 | ||
478 | ||
479 | /************************************************* | |
480 | * Set delivery info into all active addresses * | |
481 | *************************************************/ | |
482 | ||
483 | /* Only addresses whose status is >= PENDING are relevant. A lesser | |
484 | status means that an address is not currently being processed. | |
485 | ||
486 | Arguments: | |
447d236c PH |
487 | addrlist points to a chain of addresses |
488 | errno_value to put in each address's errno field | |
489 | msg to put in each address's message field | |
490 | rc to put in each address's transport_return field | |
491 | pass_message if TRUE, set the "pass message" flag in the address | |
c562fd30 | 492 | host if set, mark addrs as having used this host |
895fbaf2 JH |
493 | smtp_greeting from peer |
494 | helo_response from peer | |
0756eb3c PH |
495 | |
496 | If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in | |
497 | the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate | |
498 | this particular type of timeout. | |
499 | ||
500 | Returns: nothing | |
501 | */ | |
502 | ||
7cd1141b PH |
503 | static void |
504 | set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
895fbaf2 JH |
505 | BOOL pass_message, host_item * host |
506 | #ifdef EXPERIMENTAL_DSN_INFO | |
507 | , const uschar * smtp_greeting, const uschar * helo_response | |
508 | #endif | |
509 | ) | |
0756eb3c | 510 | { |
0756eb3c PH |
511 | int orvalue = 0; |
512 | if (errno_value == ERRNO_CONNECTTIMEOUT) | |
513 | { | |
514 | errno_value = ETIMEDOUT; | |
515 | orvalue = RTEF_CTOUT; | |
516 | } | |
d7978c0f | 517 | for (address_item * addr = addrlist; addr; addr = addr->next) |
168dec3b | 518 | if (addr->transport_return >= PENDING) |
447d236c | 519 | { |
168dec3b JH |
520 | addr->basic_errno = errno_value; |
521 | addr->more_errno |= orvalue; | |
02b41d71 | 522 | if (msg) |
168dec3b JH |
523 | { |
524 | addr->message = msg; | |
525 | if (pass_message) setflag(addr, af_pass_message); | |
526 | } | |
527 | addr->transport_return = rc; | |
528 | if (host) | |
895fbaf2 | 529 | { |
168dec3b | 530 | addr->host_used = host; |
895fbaf2 JH |
531 | #ifdef EXPERIMENTAL_DSN_INFO |
532 | if (smtp_greeting) | |
533 | {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';} | |
534 | addr->smtp_greeting = smtp_greeting; | |
535 | ||
536 | if (helo_response) | |
537 | {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';} | |
538 | addr->helo_response = helo_response; | |
539 | #endif | |
540 | } | |
447d236c | 541 | } |
0756eb3c PH |
542 | } |
543 | ||
895fbaf2 JH |
544 | static void |
545 | set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
546 | BOOL pass_message) | |
547 | { | |
548 | set_errno(addrlist, errno_value, msg, rc, pass_message, NULL | |
549 | #ifdef EXPERIMENTAL_DSN_INFO | |
550 | , NULL, NULL | |
551 | #endif | |
552 | ); | |
553 | } | |
0756eb3c PH |
554 | |
555 | ||
556 | /************************************************* | |
557 | * Check an SMTP response * | |
558 | *************************************************/ | |
559 | ||
560 | /* This function is given an errno code and the SMTP response buffer | |
561 | to analyse, together with the host identification for generating messages. It | |
562 | sets an appropriate message and puts the first digit of the response code into | |
563 | the yield variable. If no response was actually read, a suitable digit is | |
564 | chosen. | |
565 | ||
566 | Arguments: | |
447d236c PH |
567 | host the current host, to get its name for messages |
568 | errno_value pointer to the errno value | |
569 | more_errno from the top address for use with ERRNO_FILTER_FAIL | |
570 | buffer the SMTP response buffer | |
571 | yield where to put a one-digit SMTP response code | |
4c04137d | 572 | message where to put an error message |
447d236c PH |
573 | pass_message set TRUE if message is an SMTP response |
574 | ||
575 | Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE | |
0756eb3c PH |
576 | */ |
577 | ||
a7538db1 JH |
578 | static BOOL |
579 | check_response(host_item *host, int *errno_value, int more_errno, | |
447d236c | 580 | uschar *buffer, int *yield, uschar **message, BOOL *pass_message) |
0756eb3c | 581 | { |
0d9fa8c0 | 582 | uschar * pl = pipelining_active ? US"pipelined " : US""; |
e9166683 | 583 | const uschar * s; |
0756eb3c PH |
584 | |
585 | *yield = '4'; /* Default setting is to give a temporary error */ | |
586 | ||
e9166683 | 587 | switch(*errno_value) |
0756eb3c | 588 | { |
e9166683 JH |
589 | case ETIMEDOUT: /* Handle response timeout */ |
590 | *message = US string_sprintf("SMTP timeout after %s%s", | |
591 | pl, smtp_command); | |
592 | if (transport_count > 0) | |
593 | *message = US string_sprintf("%s (%d bytes written)", *message, | |
594 | transport_count); | |
595 | return FALSE; | |
596 | ||
597 | case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */ | |
598 | s = string_printing(buffer); | |
599 | while (isspace(*s)) s++; | |
600 | *message = *s == 0 | |
601 | ? string_sprintf("Malformed SMTP reply (an empty line) " | |
602 | "in response to %s%s", pl, smtp_command) | |
603 | : string_sprintf("Malformed SMTP reply in response to %s%s: %s", | |
604 | pl, smtp_command, s); | |
605 | return FALSE; | |
606 | ||
fc243e94 JH |
607 | case ERRNO_TLSFAILURE: /* Handle bad first read; can happen with |
608 | GnuTLS and TLS1.3 */ | |
609 | *message = US"bad first read from TLS conn"; | |
610 | return TRUE; | |
611 | ||
e9166683 JH |
612 | case ERRNO_FILTER_FAIL: /* Handle a failed filter process error; |
613 | can't send QUIT as we mustn't end the DATA. */ | |
614 | *message = string_sprintf("transport filter process failed (%d)%s", | |
615 | more_errno, | |
616 | more_errno == EX_EXECFAILED ? ": unable to execute command" : ""); | |
617 | return FALSE; | |
618 | ||
619 | case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion; | |
620 | can't send QUIT as we mustn't end the DATA. */ | |
621 | *message = | |
622 | string_sprintf("failed to expand headers_add or headers_remove: %s", | |
623 | expand_string_message); | |
624 | return FALSE; | |
625 | ||
626 | case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */ | |
f3ebb786 | 627 | *message = US"failed to write a data block"; |
e9166683 | 628 | return FALSE; |
0756eb3c | 629 | |
8c5d388a | 630 | #ifdef SUPPORT_I18N |
e9166683 JH |
631 | case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */ |
632 | *message = US"utf8 support required but not offered for forwarding"; | |
633 | DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message); | |
634 | return TRUE; | |
250b6871 | 635 | #endif |
e9166683 | 636 | } |
250b6871 | 637 | |
0756eb3c PH |
638 | /* Handle error responses from the remote mailer. */ |
639 | ||
640 | if (buffer[0] != 0) | |
641 | { | |
e9166683 JH |
642 | *message = string_sprintf("SMTP error from remote mail server after %s%s: " |
643 | "%s", pl, smtp_command, s = string_printing(buffer)); | |
447d236c | 644 | *pass_message = TRUE; |
0756eb3c PH |
645 | *yield = buffer[0]; |
646 | return TRUE; | |
647 | } | |
648 | ||
649 | /* No data was read. If there is no errno, this must be the EOF (i.e. | |
19b9dc85 PH |
650 | connection closed) case, which causes deferral. An explicit connection reset |
651 | error has the same effect. Otherwise, put the host's identity in the message, | |
652 | leaving the errno value to be interpreted as well. In all cases, we have to | |
653 | assume the connection is now dead. */ | |
0756eb3c | 654 | |
19b9dc85 | 655 | if (*errno_value == 0 || *errno_value == ECONNRESET) |
0756eb3c PH |
656 | { |
657 | *errno_value = ERRNO_SMTPCLOSED; | |
c562fd30 | 658 | *message = US string_sprintf("Remote host closed connection " |
02b41d71 | 659 | "in response to %s%s", pl, smtp_command); |
0756eb3c | 660 | } |
de6273b4 JH |
661 | else |
662 | *message = US string_sprintf("%s [%s]", host->name, host->address); | |
0756eb3c PH |
663 | |
664 | return FALSE; | |
665 | } | |
666 | ||
667 | ||
668 | ||
669 | /************************************************* | |
670 | * Write error message to logs * | |
671 | *************************************************/ | |
672 | ||
673 | /* This writes to the main log and to the message log. | |
674 | ||
675 | Arguments: | |
0756eb3c | 676 | host the current host |
ec62d0a9 HSHR |
677 | detail the current message (addr_item->message) |
678 | basic_errno the errno (addr_item->basic_errno) | |
0756eb3c PH |
679 | |
680 | Returns: nothing | |
681 | */ | |
682 | ||
683 | static void | |
ec62d0a9 | 684 | write_logs(const host_item *host, const uschar *suffix, int basic_errno) |
0756eb3c | 685 | { |
52f12a7c JH |
686 | gstring * message = LOGGING(outgoing_port) |
687 | ? string_fmt_append(NULL, "H=%s [%s]:%d", host->name, host->address, | |
584ddd64 | 688 | host->port == PORT_NONE ? 25 : host->port) |
52f12a7c | 689 | : string_fmt_append(NULL, "H=%s [%s]", host->name, host->address); |
c562fd30 | 690 | |
ec62d0a9 | 691 | if (suffix) |
0756eb3c | 692 | { |
52f12a7c | 693 | message = string_fmt_append(message, ": %s", suffix); |
ec62d0a9 | 694 | if (basic_errno > 0) |
52f12a7c | 695 | message = string_fmt_append(message, ": %s", strerror(basic_errno)); |
0756eb3c PH |
696 | } |
697 | else | |
52f12a7c | 698 | message = string_fmt_append(message, " %s", exim_errstr(basic_errno)); |
ec62d0a9 | 699 | |
52f12a7c JH |
700 | log_write(0, LOG_MAIN, "%s", string_from_gstring(message)); |
701 | deliver_msglog("%s %s\n", tod_stamp(tod_log), message->s); | |
0756eb3c PH |
702 | } |
703 | ||
c562fd30 JH |
704 | static void |
705 | msglog_line(host_item * host, uschar * message) | |
706 | { | |
37f3dc43 JH |
707 | deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log), |
708 | host->name, host->address, message); | |
c562fd30 JH |
709 | } |
710 | ||
0756eb3c PH |
711 | |
712 | ||
0cbf2b82 | 713 | #ifndef DISABLE_EVENT |
d68218c7 JH |
714 | /************************************************* |
715 | * Post-defer action * | |
716 | *************************************************/ | |
717 | ||
718 | /* This expands an arbitrary per-transport string. | |
719 | It might, for example, be used to write to the database log. | |
720 | ||
721 | Arguments: | |
d68218c7 JH |
722 | addr the address item containing error information |
723 | host the current host | |
724 | ||
725 | Returns: nothing | |
726 | */ | |
727 | ||
728 | static void | |
774ef2d7 | 729 | deferred_event_raise(address_item *addr, host_item *host) |
d68218c7 | 730 | { |
774ef2d7 | 731 | uschar * action = addr->transport->event_action; |
55414b25 | 732 | const uschar * save_domain; |
a7538db1 JH |
733 | uschar * save_local; |
734 | ||
d68218c7 | 735 | if (!action) |
a7538db1 | 736 | return; |
d68218c7 | 737 | |
a7538db1 JH |
738 | save_domain = deliver_domain; |
739 | save_local = deliver_localpart; | |
740 | ||
741 | /*XXX would ip & port already be set up? */ | |
742 | deliver_host_address = string_copy(host->address); | |
774ef2d7 JH |
743 | deliver_host_port = host->port == PORT_NONE ? 25 : host->port; |
744 | event_defer_errno = addr->basic_errno; | |
d68218c7 JH |
745 | |
746 | router_name = addr->router->name; | |
747 | transport_name = addr->transport->name; | |
a7538db1 JH |
748 | deliver_domain = addr->domain; |
749 | deliver_localpart = addr->local_part; | |
750 | ||
774ef2d7 | 751 | (void) event_raise(action, US"msg:host:defer", |
a7538db1 JH |
752 | addr->message |
753 | ? addr->basic_errno > 0 | |
754 | ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno)) | |
755 | : string_copy(addr->message) | |
756 | : addr->basic_errno > 0 | |
757 | ? string_copy(US strerror(addr->basic_errno)) | |
758 | : NULL); | |
759 | ||
760 | deliver_localpart = save_local; | |
761 | deliver_domain = save_domain; | |
d68218c7 JH |
762 | router_name = transport_name = NULL; |
763 | } | |
764 | #endif | |
765 | ||
ee8b8090 JH |
766 | /************************************************* |
767 | * Reap SMTP specific responses * | |
768 | *************************************************/ | |
769 | static int | |
770 | smtp_discard_responses(smtp_context * sx, smtp_transport_options_block * ob, | |
771 | int count) | |
772 | { | |
773 | uschar flushbuffer[4096]; | |
774 | ||
775 | while (count-- > 0) | |
776 | { | |
777 | if (!smtp_read_response(sx, flushbuffer, sizeof(flushbuffer), | |
778 | '2', ob->command_timeout) | |
779 | && (errno != 0 || flushbuffer[0] == 0)) | |
780 | break; | |
781 | } | |
782 | return count; | |
783 | } | |
784 | ||
785 | ||
786 | /* Return boolean success */ | |
787 | ||
788 | static BOOL | |
789 | smtp_reap_banner(smtp_context * sx) | |
790 | { | |
791 | BOOL good_response = smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), | |
792 | '2', (SOB sx->conn_args.ob)->command_timeout); | |
793 | #ifdef EXPERIMENTAL_DSN_INFO | |
794 | sx->smtp_greeting = string_copy(sx->buffer); | |
795 | #endif | |
796 | return good_response; | |
797 | } | |
798 | ||
799 | static BOOL | |
800 | smtp_reap_ehlo(smtp_context * sx) | |
801 | { | |
802 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', | |
803 | (SOB sx->conn_args.ob)->command_timeout)) | |
804 | { | |
805 | if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp) | |
806 | { | |
807 | #ifdef EXPERIMENTAL_DSN_INFO | |
808 | sx->helo_response = string_copy(sx->buffer); | |
809 | #endif | |
810 | return FALSE; | |
811 | } | |
812 | sx->esmtp = FALSE; | |
813 | } | |
814 | #ifdef EXPERIMENTAL_DSN_INFO | |
815 | sx->helo_response = string_copy(sx->buffer); | |
816 | #endif | |
8e78571a JH |
817 | #ifndef DISABLE_EVENT |
818 | (void) event_raise(sx->conn_args.tblock->event_action, | |
819 | US"smtp:ehlo", sx->buffer); | |
820 | #endif | |
ee8b8090 JH |
821 | return TRUE; |
822 | } | |
823 | ||
824 | ||
825 | ||
4e48d56c | 826 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
827 | static uschar * |
828 | ehlo_cache_key(const smtp_context * sx) | |
829 | { | |
830 | host_item * host = sx->conn_args.host; | |
831 | return Ustrchr(host->address, ':') | |
832 | ? string_sprintf("[%s]:%d.EHLO", host->address, | |
833 | host->port == PORT_NONE ? sx->port : host->port) | |
834 | : string_sprintf("%s:%d.EHLO", host->address, | |
835 | host->port == PORT_NONE ? sx->port : host->port); | |
836 | } | |
837 | ||
838 | static void | |
839 | write_ehlo_cache_entry(const smtp_context * sx) | |
840 | { | |
841 | open_db dbblock, * dbm_file; | |
842 | ||
b10c87b3 | 843 | if ((dbm_file = dbfn_open(US"misc", O_RDWR, &dbblock, TRUE, TRUE))) |
ee8b8090 JH |
844 | { |
845 | uschar * ehlo_resp_key = ehlo_cache_key(sx); | |
846 | dbdata_ehlo_resp er = { .data = sx->ehlo_resp }; | |
847 | ||
cb6bd80f JH |
848 | HDEBUG(D_transport) debug_printf("writing clr %04x/%04x cry %04x/%04x\n", |
849 | sx->ehlo_resp.cleartext_features, sx->ehlo_resp.cleartext_auths, | |
850 | sx->ehlo_resp.crypted_features, sx->ehlo_resp.crypted_auths); | |
851 | ||
ee8b8090 JH |
852 | dbfn_write(dbm_file, ehlo_resp_key, &er, (int)sizeof(er)); |
853 | dbfn_close(dbm_file); | |
854 | } | |
855 | } | |
856 | ||
857 | static void | |
858 | invalidate_ehlo_cache_entry(smtp_context * sx) | |
859 | { | |
860 | open_db dbblock, * dbm_file; | |
861 | ||
862 | if ( sx->early_pipe_active | |
b10c87b3 | 863 | && (dbm_file = dbfn_open(US"misc", O_RDWR, &dbblock, TRUE, TRUE))) |
ee8b8090 JH |
864 | { |
865 | uschar * ehlo_resp_key = ehlo_cache_key(sx); | |
866 | dbfn_delete(dbm_file, ehlo_resp_key); | |
867 | dbfn_close(dbm_file); | |
868 | } | |
869 | } | |
870 | ||
871 | static BOOL | |
872 | read_ehlo_cache_entry(smtp_context * sx) | |
873 | { | |
874 | open_db dbblock; | |
875 | open_db * dbm_file; | |
876 | ||
b10c87b3 | 877 | if (!(dbm_file = dbfn_open(US"misc", O_RDONLY, &dbblock, FALSE, TRUE))) |
ee8b8090 JH |
878 | { DEBUG(D_transport) debug_printf("ehlo-cache: no misc DB\n"); } |
879 | else | |
880 | { | |
881 | uschar * ehlo_resp_key = ehlo_cache_key(sx); | |
882 | dbdata_ehlo_resp * er; | |
883 | ||
884 | if (!(er = dbfn_read(dbm_file, ehlo_resp_key))) | |
885 | { DEBUG(D_transport) debug_printf("no ehlo-resp record\n"); } | |
886 | else if (time(NULL) - er->time_stamp > retry_data_expire) | |
887 | { | |
888 | DEBUG(D_transport) debug_printf("ehlo-resp record too old\n"); | |
889 | dbfn_close(dbm_file); | |
b10c87b3 | 890 | if ((dbm_file = dbfn_open(US"misc", O_RDWR, &dbblock, TRUE, TRUE))) |
ee8b8090 JH |
891 | dbfn_delete(dbm_file, ehlo_resp_key); |
892 | } | |
893 | else | |
894 | { | |
895 | sx->ehlo_resp = er->data; | |
896 | dbfn_close(dbm_file); | |
897 | DEBUG(D_transport) debug_printf( | |
898 | "EHLO response bits from cache: cleartext 0x%04x crypted 0x%04x\n", | |
899 | er->data.cleartext_features, er->data.crypted_features); | |
900 | return TRUE; | |
901 | } | |
902 | dbfn_close(dbm_file); | |
903 | } | |
904 | return FALSE; | |
905 | } | |
906 | ||
907 | ||
908 | ||
909 | /* Return an auths bitmap for the set of AUTH methods offered by the server | |
910 | which match our authenticators. */ | |
911 | ||
912 | static unsigned short | |
913 | study_ehlo_auths(smtp_context * sx) | |
914 | { | |
915 | uschar * names; | |
916 | auth_instance * au; | |
917 | uschar authnum; | |
918 | unsigned short authbits = 0; | |
919 | ||
920 | if (!sx->esmtp) return 0; | |
921 | if (!regex_AUTH) regex_AUTH = regex_must_compile(AUTHS_REGEX, FALSE, TRUE); | |
922 | if (!regex_match_and_setup(regex_AUTH, sx->buffer, 0, -1)) return 0; | |
923 | expand_nmax = -1; /* reset */ | |
924 | names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
925 | ||
926 | for (au = auths, authnum = 0; au; au = au->next, authnum++) if (au->client) | |
927 | { | |
928 | const uschar * list = names; | |
929 | int sep = ' '; | |
930 | uschar name[32]; | |
931 | ||
932 | while (string_nextinlist(&list, &sep, name, sizeof(name))) | |
933 | if (strcmpic(au->public_name, name) == 0) | |
934 | { authbits |= BIT(authnum); break; } | |
935 | } | |
936 | ||
937 | DEBUG(D_transport) | |
938 | debug_printf("server offers %s AUTH, methods '%s', bitmap 0x%04x\n", | |
939 | tls_out.active.sock >= 0 ? "crypted" : "plaintext", names, authbits); | |
940 | ||
941 | if (tls_out.active.sock >= 0) | |
942 | sx->ehlo_resp.crypted_auths = authbits; | |
943 | else | |
944 | sx->ehlo_resp.cleartext_auths = authbits; | |
945 | return authbits; | |
946 | } | |
947 | ||
948 | ||
949 | ||
950 | ||
951 | /* Wait for and check responses for early-pipelining. | |
952 | ||
953 | Called from the lower-level smtp_read_response() function | |
954 | used for general code that assume synchronisation, if context | |
955 | flags indicate outstanding early-pipelining commands. Also | |
956 | called fom sync_responses() which handles pipelined commands. | |
957 | ||
958 | Arguments: | |
959 | sx smtp connection context | |
960 | countp number of outstanding responses, adjusted on return | |
961 | ||
962 | Return: | |
963 | OK all well | |
fc243e94 | 964 | DEFER error on first read of TLS'd conn |
ee8b8090 JH |
965 | FAIL SMTP error in response |
966 | */ | |
967 | int | |
968 | smtp_reap_early_pipe(smtp_context * sx, int * countp) | |
969 | { | |
970 | BOOL pending_BANNER = sx->pending_BANNER; | |
971 | BOOL pending_EHLO = sx->pending_EHLO; | |
fc243e94 | 972 | int rc = FAIL; |
ee8b8090 JH |
973 | |
974 | sx->pending_BANNER = FALSE; /* clear early to avoid recursion */ | |
975 | sx->pending_EHLO = FALSE; | |
976 | ||
977 | if (pending_BANNER) | |
978 | { | |
979 | DEBUG(D_transport) debug_printf("%s expect banner\n", __FUNCTION__); | |
980 | (*countp)--; | |
981 | if (!smtp_reap_banner(sx)) | |
982 | { | |
983 | DEBUG(D_transport) debug_printf("bad banner\n"); | |
fc243e94 | 984 | if (tls_out.active.sock >= 0) rc = DEFER; |
ee8b8090 JH |
985 | goto fail; |
986 | } | |
987 | } | |
988 | ||
989 | if (pending_EHLO) | |
990 | { | |
991 | unsigned peer_offered; | |
992 | unsigned short authbits = 0, * ap; | |
993 | ||
994 | DEBUG(D_transport) debug_printf("%s expect ehlo\n", __FUNCTION__); | |
995 | (*countp)--; | |
996 | if (!smtp_reap_ehlo(sx)) | |
997 | { | |
998 | DEBUG(D_transport) debug_printf("bad response for EHLO\n"); | |
fc243e94 | 999 | if (tls_out.active.sock >= 0) rc = DEFER; |
ee8b8090 JH |
1000 | goto fail; |
1001 | } | |
1002 | ||
1003 | /* Compare the actual EHLO response to the cached value we assumed; | |
1004 | on difference, dump or rewrite the cache and arrange for a retry. */ | |
1005 | ||
1006 | ap = tls_out.active.sock < 0 | |
1007 | ? &sx->ehlo_resp.cleartext_auths : &sx->ehlo_resp.crypted_auths; | |
1008 | ||
1009 | peer_offered = ehlo_response(sx->buffer, | |
9883af72 | 1010 | (tls_out.active.sock < 0 ? OPTION_TLS : 0) |
ee8b8090 JH |
1011 | | OPTION_CHUNKING | OPTION_PRDR | OPTION_DSN | OPTION_PIPE | OPTION_SIZE |
1012 | | OPTION_UTF8 | OPTION_EARLY_PIPE | |
1013 | ); | |
1014 | if ( peer_offered != sx->peer_offered | |
1015 | || (authbits = study_ehlo_auths(sx)) != *ap) | |
1016 | { | |
1017 | HDEBUG(D_transport) | |
cb6bd80f JH |
1018 | debug_printf("EHLO %s extensions changed, 0x%04x/0x%04x -> 0x%04x/0x%04x\n", |
1019 | tls_out.active.sock < 0 ? "cleartext" : "crypted", | |
ee8b8090 | 1020 | sx->peer_offered, *ap, peer_offered, authbits); |
cb6bd80f JH |
1021 | *(tls_out.active.sock < 0 |
1022 | ? &sx->ehlo_resp.cleartext_features : &sx->ehlo_resp.crypted_features) = peer_offered; | |
ee8b8090 JH |
1023 | *ap = authbits; |
1024 | if (peer_offered & OPTION_EARLY_PIPE) | |
1025 | write_ehlo_cache_entry(sx); | |
1026 | else | |
1027 | invalidate_ehlo_cache_entry(sx); | |
1028 | ||
1029 | return OK; /* just carry on */ | |
1030 | } | |
1031 | } | |
1032 | return OK; | |
1033 | ||
1034 | fail: | |
1035 | invalidate_ehlo_cache_entry(sx); | |
1036 | (void) smtp_discard_responses(sx, sx->conn_args.ob, *countp); | |
fc243e94 | 1037 | return rc; |
ee8b8090 JH |
1038 | } |
1039 | #endif | |
1040 | ||
1041 | ||
0756eb3c PH |
1042 | /************************************************* |
1043 | * Synchronize SMTP responses * | |
1044 | *************************************************/ | |
1045 | ||
1046 | /* This function is called from smtp_deliver() to receive SMTP responses from | |
1047 | the server, and match them up with the commands to which they relate. When | |
1048 | PIPELINING is not in use, this function is called after every command, and is | |
1049 | therefore somewhat over-engineered, but it is simpler to use a single scheme | |
1050 | that works both with and without PIPELINING instead of having two separate sets | |
1051 | of code. | |
1052 | ||
1053 | The set of commands that are buffered up with pipelining may start with MAIL | |
1054 | and may end with DATA; in between are RCPT commands that correspond to the | |
1055 | addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH, | |
1056 | etc.) are never buffered. | |
1057 | ||
1058 | Errors after MAIL or DATA abort the whole process leaving the response in the | |
1059 | buffer. After MAIL, pending responses are flushed, and the original command is | |
1060 | re-instated in big_buffer for error messages. For RCPT commands, the remote is | |
1061 | permitted to reject some recipient addresses while accepting others. However | |
1062 | certain errors clearly abort the whole process. Set the value in | |
1063 | transport_return to PENDING_OK if the address is accepted. If there is a | |
1064 | subsequent general error, it will get reset accordingly. If not, it will get | |
1065 | converted to OK at the end. | |
1066 | ||
1067 | Arguments: | |
df5b41e3 | 1068 | sx smtp connection context |
48c7f9e2 | 1069 | count the number of responses to read |
48c7f9e2 PH |
1070 | pending_DATA 0 if last command sent was not DATA |
1071 | +1 if previously had a good recipient | |
1072 | -1 if not previously had a good recipient | |
0756eb3c PH |
1073 | |
1074 | Returns: 3 if at least one address had 2xx and one had 5xx | |
1075 | 2 if at least one address had 5xx but none had 2xx | |
1076 | 1 if at least one host had a 2xx response, but none had 5xx | |
1077 | 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA) | |
1078 | -1 timeout while reading RCPT response | |
1079 | -2 I/O or other non-response error for RCPT | |
1080 | -3 DATA or MAIL failed - errno and buffer set | |
ee8b8090 | 1081 | -4 banner or EHLO failed (early-pipelining) |
fc243e94 | 1082 | -5 banner or EHLO failed (early-pipelining, TLS) |
0756eb3c PH |
1083 | */ |
1084 | ||
1085 | static int | |
df5b41e3 | 1086 | sync_responses(smtp_context * sx, int count, int pending_DATA) |
0756eb3c | 1087 | { |
ee8b8090 JH |
1088 | address_item * addr = sx->sync_addr; |
1089 | smtp_transport_options_block * ob = sx->conn_args.ob; | |
0756eb3c PH |
1090 | int yield = 0; |
1091 | ||
4e48d56c | 1092 | #ifdef SUPPORT_PIPE_CONNECT |
dca6d121 | 1093 | int rc; |
fc243e94 JH |
1094 | if ((rc = smtp_reap_early_pipe(sx, &count)) != OK) |
1095 | return rc == FAIL ? -4 : -5; | |
ee8b8090 JH |
1096 | #endif |
1097 | ||
0756eb3c PH |
1098 | /* Handle the response for a MAIL command. On error, reinstate the original |
1099 | command in big_buffer for error message use, and flush any further pending | |
1100 | responses before returning, except after I/O errors and timeouts. */ | |
1101 | ||
df5b41e3 | 1102 | if (sx->pending_MAIL) |
0756eb3c | 1103 | { |
7c576fca | 1104 | DEBUG(D_transport) debug_printf("%s expect mail\n", __FUNCTION__); |
0756eb3c | 1105 | count--; |
251b9eb4 | 1106 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), |
e9166683 | 1107 | '2', ob->command_timeout)) |
0756eb3c | 1108 | { |
e027f545 | 1109 | DEBUG(D_transport) debug_printf("bad response for MAIL\n"); |
0756eb3c | 1110 | Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */ |
fc243e94 JH |
1111 | if (errno == ERRNO_TLSFAILURE) |
1112 | return -5; | |
df5b41e3 | 1113 | if (errno == 0 && sx->buffer[0] != 0) |
0756eb3c | 1114 | { |
e97957bc | 1115 | int save_errno = 0; |
df5b41e3 | 1116 | if (sx->buffer[0] == '4') |
e97957bc PH |
1117 | { |
1118 | save_errno = ERRNO_MAIL4XX; | |
df5b41e3 | 1119 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc | 1120 | } |
ee8b8090 | 1121 | count = smtp_discard_responses(sx, ob, count); |
e97957bc | 1122 | errno = save_errno; |
0756eb3c | 1123 | } |
c562fd30 JH |
1124 | |
1125 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
1126 | while (count-- > 0) /* Mark any pending addrs with the host used */ | |
1127 | { | |
1128 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
ee8b8090 | 1129 | addr->host_used = sx->conn_args.host; |
c562fd30 JH |
1130 | addr = addr->next; |
1131 | } | |
0756eb3c PH |
1132 | return -3; |
1133 | } | |
1134 | } | |
1135 | ||
1136 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
1137 | ||
1138 | /* Read and handle the required number of RCPT responses, matching each one up | |
1139 | with an address by scanning for the next address whose status is PENDING_DEFER. | |
1140 | */ | |
1141 | ||
1142 | while (count-- > 0) | |
1143 | { | |
4c2471ca JH |
1144 | while (addr->transport_return != PENDING_DEFER) |
1145 | if (!(addr = addr->next)) | |
1146 | return -2; | |
0756eb3c PH |
1147 | |
1148 | /* The address was accepted */ | |
ee8b8090 | 1149 | addr->host_used = sx->conn_args.host; |
0756eb3c | 1150 | |
7c576fca | 1151 | DEBUG(D_transport) debug_printf("%s expect rcpt\n", __FUNCTION__); |
251b9eb4 | 1152 | if (smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), |
e9166683 | 1153 | '2', ob->command_timeout)) |
0756eb3c PH |
1154 | { |
1155 | yield |= 1; | |
1156 | addr->transport_return = PENDING_OK; | |
1157 | ||
1158 | /* If af_dr_retry_exists is set, there was a routing delay on this address; | |
09945f1e PH |
1159 | ensure that any address-specific retry record is expunged. We do this both |
1160 | for the basic key and for the version that also includes the sender. */ | |
0756eb3c PH |
1161 | |
1162 | if (testflag(addr, af_dr_retry_exists)) | |
09945f1e PH |
1163 | { |
1164 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, | |
1165 | sender_address); | |
1166 | retry_add_item(addr, altkey, rf_delete); | |
0756eb3c | 1167 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
09945f1e | 1168 | } |
0756eb3c PH |
1169 | } |
1170 | ||
fc243e94 JH |
1171 | /* Error on first TLS read */ |
1172 | ||
1173 | else if (errno == ERRNO_TLSFAILURE) | |
1174 | return -5; | |
1175 | ||
0756eb3c PH |
1176 | /* Timeout while reading the response */ |
1177 | ||
1178 | else if (errno == ETIMEDOUT) | |
1179 | { | |
c562fd30 | 1180 | uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>", |
ee8b8090 | 1181 | transport_rcpt_address(addr, sx->conn_args.tblock->rcpt_include_affixes)); |
df5b41e3 | 1182 | set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE); |
0756eb3c | 1183 | retry_add_item(addr, addr->address_retry_key, 0); |
f6c332bd | 1184 | update_waiting = FALSE; |
0756eb3c PH |
1185 | return -1; |
1186 | } | |
1187 | ||
1188 | /* Handle other errors in obtaining an SMTP response by returning -1. This | |
1189 | will cause all the addresses to be deferred. Restore the SMTP command in | |
1190 | big_buffer for which we are checking the response, so the error message | |
1191 | makes sense. */ | |
1192 | ||
df5b41e3 | 1193 | else if (errno != 0 || sx->buffer[0] == 0) |
0756eb3c | 1194 | { |
f3ebb786 JH |
1195 | gstring gs = { .size = big_buffer_size, .ptr = 0, .s = big_buffer }, * g = &gs; |
1196 | ||
1197 | /* Use taint-unchecked routines for writing into big_buffer, trusting | |
1198 | that we'll never expand it. */ | |
1199 | ||
1200 | g = string_fmt_append_f(g, SVFMT_TAINT_NOCHK, "RCPT TO:<%s>", | |
ee8b8090 | 1201 | transport_rcpt_address(addr, sx->conn_args.tblock->rcpt_include_affixes)); |
f3ebb786 | 1202 | string_from_gstring(g); |
0756eb3c PH |
1203 | return -2; |
1204 | } | |
1205 | ||
1206 | /* Handle SMTP permanent and temporary response codes. */ | |
1207 | ||
1208 | else | |
1209 | { | |
1210 | addr->message = | |
447d236c | 1211 | string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: " |
ee8b8090 | 1212 | "%s", transport_rcpt_address(addr, sx->conn_args.tblock->rcpt_include_affixes), |
df5b41e3 | 1213 | string_printing(sx->buffer)); |
447d236c | 1214 | setflag(addr, af_pass_message); |
e9166683 | 1215 | if (!sx->verify) |
ee8b8090 | 1216 | msglog_line(sx->conn_args.host, addr->message); |
0756eb3c PH |
1217 | |
1218 | /* The response was 5xx */ | |
1219 | ||
df5b41e3 | 1220 | if (sx->buffer[0] == '5') |
0756eb3c PH |
1221 | { |
1222 | addr->transport_return = FAIL; | |
1223 | yield |= 2; | |
1224 | } | |
1225 | ||
1226 | /* The response was 4xx */ | |
1227 | ||
1228 | else | |
1229 | { | |
0756eb3c PH |
1230 | addr->transport_return = DEFER; |
1231 | addr->basic_errno = ERRNO_RCPT4XX; | |
df5b41e3 | 1232 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
0756eb3c | 1233 | |
e9166683 JH |
1234 | if (!sx->verify) |
1235 | { | |
0cbf2b82 | 1236 | #ifndef DISABLE_EVENT |
e9166683 JH |
1237 | event_defer_errno = addr->more_errno; |
1238 | msg_event_raise(US"msg:rcpt:host:defer", addr); | |
5ef5dd52 JB |
1239 | #endif |
1240 | ||
e9166683 JH |
1241 | /* Log temporary errors if there are more hosts to be tried. |
1242 | If not, log this last one in the == line. */ | |
0756eb3c | 1243 | |
ee8b8090 | 1244 | if (sx->conn_args.host->next) |
67ea939c JH |
1245 | if (LOGGING(outgoing_port)) |
1246 | log_write(0, LOG_MAIN, "H=%s [%s]:%d %s", sx->conn_args.host->name, | |
1247 | sx->conn_args.host->address, | |
1248 | sx->port == PORT_NONE ? 25 : sx->port, addr->message); | |
1249 | else | |
1250 | log_write(0, LOG_MAIN, "H=%s [%s]: %s", sx->conn_args.host->name, | |
1251 | sx->conn_args.host->address, addr->message); | |
0756eb3c | 1252 | |
0cbf2b82 | 1253 | #ifndef DISABLE_EVENT |
e9166683 JH |
1254 | else |
1255 | msg_event_raise(US"msg:rcpt:defer", addr); | |
5ef5dd52 JB |
1256 | #endif |
1257 | ||
e9166683 JH |
1258 | /* Do not put this message on the list of those waiting for specific |
1259 | hosts, as otherwise it is likely to be tried too often. */ | |
0756eb3c | 1260 | |
e9166683 | 1261 | update_waiting = FALSE; |
0756eb3c | 1262 | |
e9166683 JH |
1263 | /* Add a retry item for the address so that it doesn't get tried again |
1264 | too soon. If address_retry_include_sender is true, add the sender address | |
1265 | to the retry key. */ | |
0756eb3c | 1266 | |
e9166683 JH |
1267 | retry_add_item(addr, |
1268 | ob->address_retry_include_sender | |
1269 | ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address) | |
1270 | : addr->address_retry_key, | |
1271 | 0); | |
1272 | } | |
0756eb3c PH |
1273 | } |
1274 | } | |
1275 | } /* Loop for next RCPT response */ | |
1276 | ||
1277 | /* Update where to start at for the next block of responses, unless we | |
1278 | have already handled all the addresses. */ | |
1279 | ||
e9166683 | 1280 | if (addr) sx->sync_addr = addr->next; |
0756eb3c PH |
1281 | |
1282 | /* Handle a response to DATA. If we have not had any good recipients, either | |
1283 | previously or in this block, the response is ignored. */ | |
1284 | ||
7c576fca | 1285 | if (pending_DATA != 0) |
0756eb3c | 1286 | { |
7c576fca | 1287 | DEBUG(D_transport) debug_printf("%s expect data\n", __FUNCTION__); |
251b9eb4 | 1288 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), |
7c576fca | 1289 | '3', ob->command_timeout)) |
e97957bc | 1290 | { |
7c576fca JH |
1291 | int code; |
1292 | uschar *msg; | |
1293 | BOOL pass_message; | |
fc243e94 JH |
1294 | |
1295 | if (errno == ERRNO_TLSFAILURE) /* Error on first TLS read */ | |
1296 | return -5; | |
1297 | ||
7c576fca | 1298 | if (pending_DATA > 0 || (yield & 1) != 0) |
e97957bc | 1299 | { |
7c576fca JH |
1300 | if (errno == 0 && sx->buffer[0] == '4') |
1301 | { | |
1302 | errno = ERRNO_DATA4XX; | |
1303 | sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
1304 | } | |
1305 | return -3; | |
e97957bc | 1306 | } |
ee8b8090 | 1307 | (void)check_response(sx->conn_args.host, &errno, 0, sx->buffer, &code, &msg, &pass_message); |
7c576fca JH |
1308 | DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining " |
1309 | "is in use and there were no good recipients\n", msg); | |
e97957bc | 1310 | } |
0756eb3c PH |
1311 | } |
1312 | ||
1313 | /* All responses read and handled; MAIL (if present) received 2xx and DATA (if | |
1314 | present) received 3xx. If any RCPTs were handled and yielded anything other | |
1315 | than 4xx, yield will be set non-zero. */ | |
1316 | ||
1317 | return yield; | |
1318 | } | |
1319 | ||
1320 | ||
1321 | ||
ee8b8090 JH |
1322 | |
1323 | ||
1324 | /* Try an authenticator's client entry */ | |
1325 | ||
1326 | static int | |
1327 | try_authenticator(smtp_context * sx, auth_instance * au) | |
1328 | { | |
1329 | smtp_transport_options_block * ob = sx->conn_args.ob; /* transport options */ | |
1330 | host_item * host = sx->conn_args.host; /* host to deliver to */ | |
1331 | int rc; | |
1332 | ||
1333 | sx->outblock.authenticating = TRUE; | |
1334 | rc = (au->info->clientcode)(au, sx, ob->command_timeout, | |
1335 | sx->buffer, sizeof(sx->buffer)); | |
1336 | sx->outblock.authenticating = FALSE; | |
1337 | DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n", au->name, rc); | |
1338 | ||
1339 | /* A temporary authentication failure must hold up delivery to | |
1340 | this host. After a permanent authentication failure, we carry on | |
1341 | to try other authentication methods. If all fail hard, try to | |
1342 | deliver the message unauthenticated unless require_auth was set. */ | |
1343 | ||
1344 | switch(rc) | |
1345 | { | |
1346 | case OK: | |
1347 | f.smtp_authenticated = TRUE; /* stops the outer loop */ | |
1348 | client_authenticator = au->name; | |
1349 | if (au->set_client_id) | |
1350 | client_authenticated_id = expand_string(au->set_client_id); | |
1351 | break; | |
1352 | ||
1353 | /* Failure after writing a command */ | |
1354 | ||
1355 | case FAIL_SEND: | |
1356 | return FAIL_SEND; | |
1357 | ||
1358 | /* Failure after reading a response */ | |
1359 | ||
1360 | case FAIL: | |
1361 | if (errno != 0 || sx->buffer[0] != '5') return FAIL; | |
1362 | log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s", | |
1363 | au->name, host->name, host->address, sx->buffer); | |
1364 | break; | |
1365 | ||
1366 | /* Failure by some other means. In effect, the authenticator | |
1367 | decided it wasn't prepared to handle this case. Typically this | |
1368 | is the result of "fail" in an expansion string. Do we need to | |
1369 | log anything here? Feb 2006: a message is now put in the buffer | |
1370 | if logging is required. */ | |
1371 | ||
1372 | case CANCELLED: | |
1373 | if (*sx->buffer != 0) | |
1374 | log_write(0, LOG_MAIN, "%s authenticator cancelled " | |
1375 | "authentication H=%s [%s] %s", au->name, host->name, | |
1376 | host->address, sx->buffer); | |
1377 | break; | |
1378 | ||
1379 | /* Internal problem, message in buffer. */ | |
1380 | ||
1381 | case ERROR: | |
1382 | set_errno_nohost(sx->addrlist, ERRNO_AUTHPROB, string_copy(sx->buffer), | |
1383 | DEFER, FALSE); | |
1384 | return ERROR; | |
1385 | } | |
1386 | return OK; | |
1387 | } | |
1388 | ||
1389 | ||
1390 | ||
1391 | ||
1392 | /* Do the client side of smtp-level authentication. | |
1393 | ||
fcc8e047 | 1394 | Arguments: |
ee8b8090 JH |
1395 | sx smtp connection context |
1396 | ||
1397 | sx->buffer should have the EHLO response from server (gets overwritten) | |
fcc8e047 JH |
1398 | |
1399 | Returns: | |
1400 | OK Success, or failed (but not required): global "smtp_authenticated" set | |
1401 | DEFER Failed authentication (and was required) | |
1402 | ERROR Internal problem | |
1403 | ||
1404 | FAIL_SEND Failed communications - transmit | |
1405 | FAIL - response | |
1406 | */ | |
1407 | ||
251b9eb4 | 1408 | static int |
ee8b8090 | 1409 | smtp_auth(smtp_context * sx) |
fcc8e047 | 1410 | { |
ee8b8090 JH |
1411 | host_item * host = sx->conn_args.host; /* host to deliver to */ |
1412 | smtp_transport_options_block * ob = sx->conn_args.ob; /* transport options */ | |
1413 | int require_auth = verify_check_given_host(CUSS &ob->hosts_require_auth, host); | |
4e48d56c | 1414 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1415 | unsigned short authbits = tls_out.active.sock >= 0 |
1416 | ? sx->ehlo_resp.crypted_auths : sx->ehlo_resp.cleartext_auths; | |
1417 | #endif | |
1418 | uschar * fail_reason = US"server did not advertise AUTH support"; | |
fcc8e047 | 1419 | |
8768d548 | 1420 | f.smtp_authenticated = FALSE; |
a7538db1 | 1421 | client_authenticator = client_authenticated_id = client_authenticated_sender = NULL; |
fcc8e047 | 1422 | |
ee8b8090 JH |
1423 | if (!regex_AUTH) |
1424 | regex_AUTH = regex_must_compile(AUTHS_REGEX, FALSE, TRUE); | |
1425 | ||
1426 | /* Is the server offering AUTH? */ | |
fcc8e047 | 1427 | |
ee8b8090 JH |
1428 | if ( sx->esmtp |
1429 | && | |
4e48d56c | 1430 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1431 | sx->early_pipe_active ? authbits |
1432 | : | |
1433 | #endif | |
1434 | regex_match_and_setup(regex_AUTH, sx->buffer, 0, -1) | |
1435 | ) | |
a7538db1 | 1436 | { |
ee8b8090 | 1437 | uschar * names = NULL; |
a7538db1 | 1438 | expand_nmax = -1; /* reset */ |
fcc8e047 | 1439 | |
4e48d56c | 1440 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1441 | if (!sx->early_pipe_active) |
1442 | #endif | |
1443 | names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
1444 | ||
a7538db1 | 1445 | /* Must not do this check until after we have saved the result of the |
ee8b8090 | 1446 | regex match above as the check could be another RE. */ |
fcc8e047 | 1447 | |
ee8b8090 JH |
1448 | if ( require_auth == OK |
1449 | || verify_check_given_host(CUSS &ob->hosts_try_auth, host) == OK) | |
a7538db1 | 1450 | { |
a7538db1 | 1451 | DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n"); |
ee8b8090 JH |
1452 | fail_reason = US"no common mechanisms were found"; |
1453 | ||
4e48d56c | 1454 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1455 | if (sx->early_pipe_active) |
1456 | { | |
1457 | /* Scan our authenticators (which support use by a client and were offered | |
1458 | by the server (checked at cache-write time)), not suppressed by | |
1459 | client_condition. If one is found, attempt to authenticate by calling its | |
1460 | client function. We are limited to supporting up to 16 authenticator | |
1461 | public-names by the number of bits in a short. */ | |
1462 | ||
dca6d121 | 1463 | auth_instance * au; |
ee8b8090 JH |
1464 | uschar bitnum; |
1465 | int rc; | |
1466 | ||
1467 | for (bitnum = 0, au = auths; | |
1468 | !f.smtp_authenticated && au && bitnum < 16; | |
1469 | bitnum++, au = au->next) if (authbits & BIT(bitnum)) | |
1470 | { | |
1471 | if ( au->client_condition | |
1472 | && !expand_check_condition(au->client_condition, au->name, | |
1473 | US"client authenticator")) | |
1474 | { | |
1475 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1476 | au->name, "client_condition is false"); | |
1477 | continue; | |
1478 | } | |
1479 | ||
1480 | /* Found data for a listed mechanism. Call its client entry. Set | |
1481 | a flag in the outblock so that data is overwritten after sending so | |
1482 | that reflections don't show it. */ | |
1483 | ||
1484 | fail_reason = US"authentication attempt(s) failed"; | |
1485 | ||
1486 | if ((rc = try_authenticator(sx, au)) != OK) | |
1487 | return rc; | |
1488 | } | |
1489 | } | |
1490 | else | |
1491 | #endif | |
fcc8e047 | 1492 | |
a7538db1 JH |
1493 | /* Scan the configured authenticators looking for one which is configured |
1494 | for use as a client, which is not suppressed by client_condition, and | |
1495 | whose name matches an authentication mechanism supported by the server. | |
1496 | If one is found, attempt to authenticate by calling its client function. | |
1497 | */ | |
fcc8e047 | 1498 | |
d7978c0f | 1499 | for (auth_instance * au = auths; !f.smtp_authenticated && au; au = au->next) |
a7538db1 JH |
1500 | { |
1501 | uschar *p = names; | |
ee8b8090 JH |
1502 | |
1503 | if ( !au->client | |
1504 | || ( au->client_condition | |
1505 | && !expand_check_condition(au->client_condition, au->name, | |
1506 | US"client authenticator"))) | |
a7538db1 JH |
1507 | { |
1508 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1509 | au->name, | |
1510 | (au->client)? "client_condition is false" : | |
1511 | "not configured as a client"); | |
1512 | continue; | |
1513 | } | |
fcc8e047 | 1514 | |
a7538db1 | 1515 | /* Loop to scan supported server mechanisms */ |
fcc8e047 | 1516 | |
cab0c277 | 1517 | while (*p) |
a7538db1 | 1518 | { |
a7538db1 | 1519 | int len = Ustrlen(au->public_name); |
ee8b8090 JH |
1520 | int rc; |
1521 | ||
a7538db1 | 1522 | while (isspace(*p)) p++; |
fcc8e047 | 1523 | |
a7538db1 JH |
1524 | if (strncmpic(au->public_name, p, len) != 0 || |
1525 | (p[len] != 0 && !isspace(p[len]))) | |
1526 | { | |
1527 | while (*p != 0 && !isspace(*p)) p++; | |
1528 | continue; | |
1529 | } | |
fcc8e047 | 1530 | |
a7538db1 JH |
1531 | /* Found data for a listed mechanism. Call its client entry. Set |
1532 | a flag in the outblock so that data is overwritten after sending so | |
1533 | that reflections don't show it. */ | |
fcc8e047 | 1534 | |
a7538db1 | 1535 | fail_reason = US"authentication attempt(s) failed"; |
a7538db1 | 1536 | |
ee8b8090 JH |
1537 | if ((rc = try_authenticator(sx, au)) != OK) |
1538 | return rc; | |
fcc8e047 | 1539 | |
a7538db1 JH |
1540 | break; /* If not authenticated, try next authenticator */ |
1541 | } /* Loop for scanning supported server mechanisms */ | |
1542 | } /* Loop for further authenticators */ | |
fcc8e047 | 1543 | } |
a7538db1 | 1544 | } |
fcc8e047 | 1545 | |
a7538db1 | 1546 | /* If we haven't authenticated, but are required to, give up. */ |
fcc8e047 | 1547 | |
8768d548 | 1548 | if (require_auth == OK && !f.smtp_authenticated) |
a7538db1 | 1549 | { |
251b9eb4 | 1550 | set_errno_nohost(sx->addrlist, ERRNO_AUTHFAIL, |
a7538db1 | 1551 | string_sprintf("authentication required but %s", fail_reason), DEFER, |
895fbaf2 | 1552 | FALSE); |
a7538db1 JH |
1553 | return DEFER; |
1554 | } | |
4d8d62b9 | 1555 | |
a7538db1 | 1556 | return OK; |
fcc8e047 JH |
1557 | } |
1558 | ||
1559 | ||
1560 | /* Construct AUTH appendix string for MAIL TO */ | |
1561 | /* | |
1562 | Arguments | |
1563 | buffer to build string | |
1564 | addrlist chain of potential addresses to deliver | |
1565 | ob transport options | |
1566 | ||
8768d548 | 1567 | Globals f.smtp_authenticated |
fcc8e047 JH |
1568 | client_authenticated_sender |
1569 | Return True on error, otherwise buffer has (possibly empty) terminated string | |
1570 | */ | |
1571 | ||
f3ebb786 | 1572 | static BOOL |
fcc8e047 JH |
1573 | smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist, |
1574 | smtp_transport_options_block *ob) | |
1575 | { | |
f3ebb786 | 1576 | uschar * local_authenticated_sender = authenticated_sender; |
fcc8e047 JH |
1577 | |
1578 | #ifdef notdef | |
8768d548 | 1579 | debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, f.smtp_authenticated?"Y":"N"); |
fcc8e047 JH |
1580 | #endif |
1581 | ||
f3ebb786 | 1582 | if (ob->authenticated_sender) |
fcc8e047 JH |
1583 | { |
1584 | uschar *new = expand_string(ob->authenticated_sender); | |
f3ebb786 | 1585 | if (!new) |
fcc8e047 | 1586 | { |
8768d548 | 1587 | if (!f.expand_string_forcedfail) |
fcc8e047 JH |
1588 | { |
1589 | uschar *message = string_sprintf("failed to expand " | |
1590 | "authenticated_sender: %s", expand_string_message); | |
895fbaf2 | 1591 | set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
fcc8e047 JH |
1592 | return TRUE; |
1593 | } | |
1594 | } | |
f3ebb786 | 1595 | else if (*new) local_authenticated_sender = new; |
fcc8e047 JH |
1596 | } |
1597 | ||
1598 | /* Add the authenticated sender address if present */ | |
1599 | ||
f3ebb786 JH |
1600 | if ( (f.smtp_authenticated || ob->authenticated_sender_force) |
1601 | && local_authenticated_sender) | |
fcc8e047 | 1602 | { |
f3ebb786 | 1603 | string_format_nt(buffer, bufsize, " AUTH=%s", |
fcc8e047 | 1604 | auth_xtextencode(local_authenticated_sender, |
f3ebb786 | 1605 | Ustrlen(local_authenticated_sender))); |
fcc8e047 JH |
1606 | client_authenticated_sender = string_copy(local_authenticated_sender); |
1607 | } | |
1608 | else | |
1609 | *buffer= 0; | |
1610 | ||
1611 | return FALSE; | |
1612 | } | |
1613 | ||
1614 | ||
1615 | ||
a39bd74d JB |
1616 | typedef struct smtp_compare_s |
1617 | { | |
1618 | uschar *current_sender_address; | |
1619 | struct transport_instance *tblock; | |
1620 | } smtp_compare_t; | |
1621 | ||
d093f8e5 JH |
1622 | |
1623 | /* Create a unique string that identifies this message, it is based on | |
1624 | sender_address, helo_data and tls_certificate if enabled. | |
1625 | */ | |
a39bd74d JB |
1626 | |
1627 | static uschar * | |
1628 | smtp_local_identity(uschar * sender, struct transport_instance * tblock) | |
1629 | { | |
1630 | address_item * addr1; | |
1631 | uschar * if1 = US""; | |
1632 | uschar * helo1 = US""; | |
01603eec | 1633 | #ifndef DISABLE_TLS |
a39bd74d JB |
1634 | uschar * tlsc1 = US""; |
1635 | #endif | |
1636 | uschar * save_sender_address = sender_address; | |
1637 | uschar * local_identity = NULL; | |
ee8b8090 | 1638 | smtp_transport_options_block * ob = SOB tblock->options_block; |
a39bd74d JB |
1639 | |
1640 | sender_address = sender; | |
1641 | ||
1642 | addr1 = deliver_make_addr (sender, TRUE); | |
1643 | deliver_set_expansions(addr1); | |
1644 | ||
1645 | if (ob->interface) | |
1646 | if1 = expand_string(ob->interface); | |
1647 | ||
1648 | if (ob->helo_data) | |
1649 | helo1 = expand_string(ob->helo_data); | |
1650 | ||
01603eec | 1651 | #ifndef DISABLE_TLS |
a39bd74d JB |
1652 | if (ob->tls_certificate) |
1653 | tlsc1 = expand_string(ob->tls_certificate); | |
1654 | local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1); | |
1655 | #else | |
1656 | local_identity = string_sprintf ("%s^%s", if1, helo1); | |
1657 | #endif | |
1658 | ||
1659 | deliver_set_expansions(NULL); | |
1660 | sender_address = save_sender_address; | |
1661 | ||
1662 | return local_identity; | |
1663 | } | |
1664 | ||
1665 | ||
1666 | ||
1667 | /* This routine is a callback that is called from transport_check_waiting. | |
1668 | This function will evaluate the incoming message versus the previous | |
1669 | message. If the incoming message is using a different local identity then | |
1670 | we will veto this new message. */ | |
1671 | ||
1672 | static BOOL | |
1673 | smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare) | |
1674 | { | |
dadff1d4 HSHR |
1675 | uschar * message_local_identity, |
1676 | * current_local_identity, | |
1677 | * new_sender_address; | |
1678 | ||
1679 | current_local_identity = | |
a39bd74d | 1680 | smtp_local_identity(s_compare->current_sender_address, s_compare->tblock); |
a39bd74d | 1681 | |
dadff1d4 HSHR |
1682 | if (!(new_sender_address = deliver_get_sender_address(message_id))) |
1683 | return 0; | |
1684 | ||
1685 | message_local_identity = | |
1686 | smtp_local_identity(new_sender_address, s_compare->tblock); | |
a39bd74d JB |
1687 | |
1688 | return Ustrcmp(current_local_identity, message_local_identity) == 0; | |
1689 | } | |
1690 | ||
1691 | ||
1692 | ||
8ac90765 JH |
1693 | static unsigned |
1694 | ehlo_response(uschar * buf, unsigned checks) | |
9094b84b | 1695 | { |
e9166683 JH |
1696 | size_t bsize = Ustrlen(buf); |
1697 | ||
ee8b8090 | 1698 | /* debug_printf("%s: check for 0x%04x\n", __FUNCTION__, checks); */ |
8ac90765 | 1699 | |
01603eec | 1700 | #ifndef DISABLE_TLS |
ee8b8090 JH |
1701 | if ( checks & OPTION_TLS |
1702 | && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
9094b84b | 1703 | #endif |
ee8b8090 | 1704 | checks &= ~OPTION_TLS; |
9094b84b | 1705 | |
14de8063 | 1706 | if ( checks & OPTION_IGNQ |
ff5aac2b JH |
1707 | && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0, |
1708 | PCRE_EOPT, NULL, 0) < 0) | |
14de8063 | 1709 | checks &= ~OPTION_IGNQ; |
9094b84b | 1710 | |
14de8063 | 1711 | if ( checks & OPTION_CHUNKING |
f98442df | 1712 | && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1713 | checks &= ~OPTION_CHUNKING; |
f98442df | 1714 | |
9094b84b | 1715 | #ifndef DISABLE_PRDR |
14de8063 | 1716 | if ( checks & OPTION_PRDR |
ff5aac2b | 1717 | && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
9094b84b | 1718 | #endif |
ee8b8090 | 1719 | checks &= ~OPTION_PRDR; |
9094b84b JH |
1720 | |
1721 | #ifdef SUPPORT_I18N | |
14de8063 | 1722 | if ( checks & OPTION_UTF8 |
ff5aac2b | 1723 | && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
9094b84b | 1724 | #endif |
ee8b8090 | 1725 | checks &= ~OPTION_UTF8; |
9094b84b | 1726 | |
14de8063 | 1727 | if ( checks & OPTION_DSN |
ff5aac2b | 1728 | && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1729 | checks &= ~OPTION_DSN; |
9094b84b | 1730 | |
14de8063 | 1731 | if ( checks & OPTION_PIPE |
ff5aac2b JH |
1732 | && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0, |
1733 | PCRE_EOPT, NULL, 0) < 0) | |
14de8063 | 1734 | checks &= ~OPTION_PIPE; |
9094b84b | 1735 | |
14de8063 | 1736 | if ( checks & OPTION_SIZE |
ff5aac2b | 1737 | && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1738 | checks &= ~OPTION_SIZE; |
9094b84b | 1739 | |
4e48d56c | 1740 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1741 | if ( checks & OPTION_EARLY_PIPE |
1742 | && pcre_exec(regex_EARLY_PIPE, NULL, CS buf, bsize, 0, | |
1743 | PCRE_EOPT, NULL, 0) < 0) | |
1744 | #endif | |
1745 | checks &= ~OPTION_EARLY_PIPE; | |
1746 | ||
1747 | /* debug_printf("%s: found 0x%04x\n", __FUNCTION__, checks); */ | |
9094b84b JH |
1748 | return checks; |
1749 | } | |
1750 | ||
1751 | ||
6d5c916c JH |
1752 | |
1753 | /* Callback for emitting a BDAT data chunk header. | |
6d5c916c | 1754 | |
e027f545 JH |
1755 | If given a nonzero size, first flush any buffered SMTP commands |
1756 | then emit the command. | |
1757 | ||
d2aa036b JH |
1758 | Reap previous SMTP command responses if requested, and always reap |
1759 | the response from a previous BDAT command. | |
1760 | ||
1761 | Args: | |
1762 | tctx transport context | |
1763 | chunk_size value for SMTP BDAT command | |
1764 | flags | |
1765 | tc_chunk_last add LAST option to SMTP BDAT command | |
1766 | tc_reap_prev reap response to previous SMTP commands | |
6d5c916c | 1767 | |
fc243e94 JH |
1768 | Returns: |
1769 | OK or ERROR | |
1770 | DEFER TLS error on first read (EHLO-resp); errno set | |
6d5c916c JH |
1771 | */ |
1772 | ||
1773 | static int | |
d2aa036b JH |
1774 | smtp_chunk_cmd_callback(transport_ctx * tctx, unsigned chunk_size, |
1775 | unsigned flags) | |
6d5c916c | 1776 | { |
ee8b8090 | 1777 | smtp_transport_options_block * ob = SOB tctx->tblock->options_block; |
e9166683 | 1778 | smtp_context * sx = tctx->smtp_context; |
e027f545 JH |
1779 | int cmd_count = 0; |
1780 | int prev_cmd_count; | |
6d5c916c | 1781 | |
4e910c01 JH |
1782 | /* Write SMTP chunk header command. If not reaping responses, note that |
1783 | there may be more writes (like, the chunk data) done soon. */ | |
6d5c916c | 1784 | |
e027f545 | 1785 | if (chunk_size > 0) |
87cb4a16 | 1786 | { |
4e48d56c | 1787 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1788 | BOOL new_conn = !!(sx->outblock.conn_args); |
1789 | #endif | |
251b9eb4 | 1790 | if((cmd_count = smtp_write_command(sx, |
4e910c01 JH |
1791 | flags & tc_reap_prev ? SCMD_FLUSH : SCMD_MORE, |
1792 | "BDAT %u%s\r\n", chunk_size, flags & tc_chunk_last ? " LAST" : "") | |
e027f545 | 1793 | ) < 0) return ERROR; |
87cb4a16 JH |
1794 | if (flags & tc_chunk_last) |
1795 | data_command = string_copy(big_buffer); /* Save for later error message */ | |
4e48d56c | 1796 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1797 | /* That command write could have been the one that made the connection. |
1798 | Copy the fd from the client conn ctx (smtp transport specific) to the | |
1799 | generic transport ctx. */ | |
1800 | ||
1801 | if (new_conn) | |
1802 | tctx->u.fd = sx->outblock.cctx->sock; | |
1803 | #endif | |
87cb4a16 | 1804 | } |
e027f545 | 1805 | |
e9166683 | 1806 | prev_cmd_count = cmd_count += sx->cmd_count; |
6d5c916c | 1807 | |
e027f545 | 1808 | /* Reap responses for any previous, but not one we just emitted */ |
6d5c916c | 1809 | |
e027f545 JH |
1810 | if (chunk_size > 0) |
1811 | prev_cmd_count--; | |
e9166683 | 1812 | if (sx->pending_BDAT) |
e027f545 | 1813 | prev_cmd_count--; |
6d5c916c | 1814 | |
e027f545 | 1815 | if (flags & tc_reap_prev && prev_cmd_count > 0) |
6d5c916c | 1816 | { |
58fc5fb2 JH |
1817 | DEBUG(D_transport) debug_printf("look for %d responses" |
1818 | " for previous pipelined cmds\n", prev_cmd_count); | |
6d5c916c | 1819 | |
e9166683 | 1820 | switch(sync_responses(sx, prev_cmd_count, 0)) |
e027f545 JH |
1821 | { |
1822 | case 1: /* 2xx (only) => OK */ | |
e9166683 JH |
1823 | case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */ |
1824 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e027f545 JH |
1825 | case 0: break; /* No 2xx or 5xx, but no probs */ |
1826 | ||
fc243e94 JH |
1827 | case -5: errno = ERRNO_TLSFAILURE; |
1828 | return DEFER; | |
4e48d56c | 1829 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1830 | case -4: /* non-2xx for pipelined banner or EHLO */ |
1831 | #endif | |
fc243e94 | 1832 | case -1: /* Timeout on RCPT */ |
e027f545 JH |
1833 | default: return ERROR; /* I/O error, or any MAIL/DATA error */ |
1834 | } | |
1835 | cmd_count = 1; | |
e9166683 | 1836 | if (!sx->pending_BDAT) |
e027f545 | 1837 | pipelining_active = FALSE; |
6d5c916c | 1838 | } |
e027f545 | 1839 | |
58fc5fb2 | 1840 | /* Reap response for an outstanding BDAT */ |
e027f545 | 1841 | |
e9166683 | 1842 | if (sx->pending_BDAT) |
e027f545 | 1843 | { |
58fc5fb2 JH |
1844 | DEBUG(D_transport) debug_printf("look for one response for BDAT\n"); |
1845 | ||
251b9eb4 | 1846 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', |
e027f545 JH |
1847 | ob->command_timeout)) |
1848 | { | |
e9166683 | 1849 | if (errno == 0 && sx->buffer[0] == '4') |
e027f545 JH |
1850 | { |
1851 | errno = ERRNO_DATA4XX; /*XXX does this actually get used? */ | |
36e55f49 | 1852 | sx->addrlist->more_errno |= |
e9166683 | 1853 | ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e027f545 JH |
1854 | } |
1855 | return ERROR; | |
1856 | } | |
1857 | cmd_count--; | |
e9166683 | 1858 | sx->pending_BDAT = FALSE; |
e027f545 JH |
1859 | pipelining_active = FALSE; |
1860 | } | |
1861 | else if (chunk_size > 0) | |
e9166683 | 1862 | sx->pending_BDAT = TRUE; |
e027f545 JH |
1863 | |
1864 | ||
e9166683 | 1865 | sx->cmd_count = cmd_count; |
e027f545 | 1866 | return OK; |
6d5c916c JH |
1867 | } |
1868 | ||
1869 | ||
1870 | ||
ee8b8090 JH |
1871 | |
1872 | ||
0756eb3c | 1873 | /************************************************* |
d093f8e5 | 1874 | * Make connection for given message * |
0756eb3c PH |
1875 | *************************************************/ |
1876 | ||
d093f8e5 JH |
1877 | /* |
1878 | Arguments: | |
1879 | ctx connection context | |
d093f8e5 JH |
1880 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for |
1881 | a second attempt after TLS initialization fails | |
d093f8e5 JH |
1882 | |
1883 | Returns: OK - the connection was made and the delivery attempted; | |
1884 | fd is set in the conn context, tls_out set up. | |
1885 | DEFER - the connection could not be made, or something failed | |
1886 | while setting up the SMTP session, or there was a | |
1887 | non-message-specific error, such as a timeout. | |
1888 | ERROR - helo_data or add_headers or authenticated_sender is | |
1889 | specified for this transport, and the string failed | |
1890 | to expand | |
1891 | */ | |
1892 | int | |
e9166683 | 1893 | smtp_setup_conn(smtp_context * sx, BOOL suppress_tls) |
d093f8e5 | 1894 | { |
ee8b8090 | 1895 | smtp_transport_options_block * ob = sx->conn_args.tblock->options_block; |
d093f8e5 | 1896 | BOOL pass_message = FALSE; |
d093f8e5 | 1897 | uschar * message = NULL; |
d093f8e5 | 1898 | int yield = OK; |
01603eec | 1899 | #ifndef DISABLE_TLS |
fc243e94 JH |
1900 | uschar * tls_errstr; |
1901 | #endif | |
d093f8e5 | 1902 | |
ee8b8090 | 1903 | sx->conn_args.ob = ob; |
d093f8e5 | 1904 | |
ee8b8090 JH |
1905 | sx->lmtp = strcmpic(ob->protocol, US"lmtp") == 0; |
1906 | sx->smtps = strcmpic(ob->protocol, US"smtps") == 0; | |
d093f8e5 JH |
1907 | sx->ok = FALSE; |
1908 | sx->send_rset = TRUE; | |
1909 | sx->send_quit = TRUE; | |
1910 | sx->setting_up = TRUE; | |
1911 | sx->esmtp = TRUE; | |
1912 | sx->esmtp_sent = FALSE; | |
59a286ef | 1913 | #ifdef SUPPORT_I18N |
d093f8e5 | 1914 | sx->utf8_needed = FALSE; |
59a286ef | 1915 | #endif |
d093f8e5 | 1916 | sx->dsn_all_lasthop = TRUE; |
21ee816d | 1917 | #ifdef SUPPORT_DANE |
c05bdbd6 | 1918 | sx->conn_args.dane = FALSE; |
8ac90765 | 1919 | sx->dane_required = |
ee8b8090 JH |
1920 | verify_check_given_host(CUSS &ob->hosts_require_dane, sx->conn_args.host) == OK; |
1921 | #endif | |
4e48d56c | 1922 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
1923 | sx->early_pipe_active = sx->early_pipe_ok = FALSE; |
1924 | sx->ehlo_resp.cleartext_features = sx->ehlo_resp.crypted_features = 0; | |
1925 | sx->pending_BANNER = sx->pending_EHLO = FALSE; | |
d093f8e5 JH |
1926 | #endif |
1927 | ||
ee8b8090 | 1928 | if ((sx->max_rcpt = sx->conn_args.tblock->max_addresses) == 0) sx->max_rcpt = 999999; |
d093f8e5 | 1929 | sx->peer_offered = 0; |
14de8063 | 1930 | sx->avoid_option = 0; |
d093f8e5 | 1931 | sx->igquotstr = US""; |
ee8b8090 | 1932 | if (!sx->helo_data) sx->helo_data = ob->helo_data; |
d093f8e5 JH |
1933 | #ifdef EXPERIMENTAL_DSN_INFO |
1934 | sx->smtp_greeting = NULL; | |
1935 | sx->helo_response = NULL; | |
59a286ef JH |
1936 | #endif |
1937 | ||
0756eb3c | 1938 | smtp_command = US"initial connection"; |
d093f8e5 | 1939 | sx->buffer[0] = '\0'; |
0756eb3c PH |
1940 | |
1941 | /* Set up the buffer for reading SMTP response packets. */ | |
1942 | ||
d093f8e5 JH |
1943 | sx->inblock.buffer = sx->inbuffer; |
1944 | sx->inblock.buffersize = sizeof(sx->inbuffer); | |
1945 | sx->inblock.ptr = sx->inbuffer; | |
1946 | sx->inblock.ptrend = sx->inbuffer; | |
0756eb3c PH |
1947 | |
1948 | /* Set up the buffer for holding SMTP commands while pipelining */ | |
1949 | ||
d093f8e5 JH |
1950 | sx->outblock.buffer = sx->outbuffer; |
1951 | sx->outblock.buffersize = sizeof(sx->outbuffer); | |
1952 | sx->outblock.ptr = sx->outbuffer; | |
1953 | sx->outblock.cmd_count = 0; | |
1954 | sx->outblock.authenticating = FALSE; | |
ee8b8090 | 1955 | sx->outblock.conn_args = NULL; |
0756eb3c | 1956 | |
6c512171 PH |
1957 | /* Reset the parameters of a TLS session. */ |
1958 | ||
817d9f57 JH |
1959 | tls_out.bits = 0; |
1960 | tls_out.cipher = NULL; /* the one we may use for this transport */ | |
9d1c15ef JH |
1961 | tls_out.ourcert = NULL; |
1962 | tls_out.peercert = NULL; | |
817d9f57 | 1963 | tls_out.peerdn = NULL; |
de517fd3 | 1964 | #ifdef USE_OPENSSL |
817d9f57 | 1965 | tls_out.sni = NULL; |
5b456975 | 1966 | #endif |
018058b2 | 1967 | tls_out.ocsp = OCSP_NOT_REQ; |
b10c87b3 JH |
1968 | #ifdef EXPERIMENTAL_TLS_RESUME |
1969 | tls_out.resumption = 0; | |
1970 | #endif | |
da40b1ec | 1971 | tls_out.ver = NULL; |
6c512171 | 1972 | |
35aba663 JH |
1973 | /* Flip the legacy TLS-related variables over to the outbound set in case |
1974 | they're used in the context of the transport. Don't bother resetting | |
02b41d71 JH |
1975 | afterward (when being used by a transport) as we're in a subprocess. |
1976 | For verify, unflipped once the callout is dealt with */ | |
35aba663 JH |
1977 | |
1978 | tls_modify_variables(&tls_out); | |
1979 | ||
01603eec | 1980 | #ifdef DISABLE_TLS |
d093f8e5 | 1981 | if (sx->smtps) |
061b7ebd | 1982 | { |
d093f8e5 | 1983 | set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available", |
895fbaf2 | 1984 | DEFER, FALSE); |
018058b2 | 1985 | return ERROR; |
061b7ebd PP |
1986 | } |
1987 | #endif | |
1988 | ||
0756eb3c PH |
1989 | /* Make a connection to the host if this isn't a continued delivery, and handle |
1990 | the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled | |
1991 | specially so they can be identified for retries. */ | |
1992 | ||
58c30e47 | 1993 | if (!continue_hostname) |
0756eb3c | 1994 | { |
e9166683 | 1995 | if (sx->verify) |
ee8b8090 | 1996 | HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->conn_args.interface, sx->port); |
02b41d71 | 1997 | |
ee8b8090 | 1998 | /* Get the actual port the connection will use, into sx->conn_args.host */ |
4311097e | 1999 | |
ee8b8090 | 2000 | smtp_port_for_connect(sx->conn_args.host, sx->port); |
0756eb3c | 2001 | |
21ee816d | 2002 | #ifdef SUPPORT_DANE |
58c30e47 | 2003 | /* Do TLSA lookup for DANE */ |
0e66b3b6 | 2004 | { |
0e66b3b6 JH |
2005 | tls_out.dane_verified = FALSE; |
2006 | tls_out.tlsa_usage = 0; | |
2007 | ||
ee8b8090 | 2008 | if (sx->conn_args.host->dnssec == DS_YES) |
0e66b3b6 | 2009 | { |
81a559c8 | 2010 | int rc; |
d093f8e5 | 2011 | if( sx->dane_required |
ee8b8090 | 2012 | || verify_check_given_host(CUSS &ob->hosts_try_dane, sx->conn_args.host) == OK |
0e66b3b6 | 2013 | ) |
c05bdbd6 | 2014 | switch (rc = tlsa_lookup(sx->conn_args.host, &sx->conn_args.tlsa_dnsa, sx->dane_required)) |
4b0fe319 | 2015 | { |
c05bdbd6 | 2016 | case OK: sx->conn_args.dane = TRUE; |
ee8b8090 | 2017 | ob->tls_tempfail_tryclear = FALSE; |
58c30e47 | 2018 | break; |
2d5fdd53 | 2019 | case FAIL_FORCED: break; |
d093f8e5 | 2020 | default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
2d5fdd53 | 2021 | string_sprintf("DANE error: tlsa lookup %s", |
aeb65e91 | 2022 | rc_to_string(rc)), |
2d5fdd53 | 2023 | rc, FALSE); |
8d3dc239 | 2024 | # ifndef DISABLE_EVENT |
ee8b8090 | 2025 | (void) event_raise(sx->conn_args.tblock->event_action, |
c4b57fdd JH |
2026 | US"dane:fail", sx->dane_required |
2027 | ? US"dane-required" : US"dnssec-invalid"); | |
8d3dc239 | 2028 | # endif |
2d5fdd53 | 2029 | return rc; |
4b0fe319 | 2030 | } |
0e66b3b6 | 2031 | } |
d093f8e5 | 2032 | else if (sx->dane_required) |
0e66b3b6 | 2033 | { |
d093f8e5 | 2034 | set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
ee8b8090 | 2035 | string_sprintf("DANE error: %s lookup not DNSSEC", sx->conn_args.host->name), |
895fbaf2 | 2036 | FAIL, FALSE); |
8d3dc239 | 2037 | # ifndef DISABLE_EVENT |
ee8b8090 | 2038 | (void) event_raise(sx->conn_args.tblock->event_action, |
c4b57fdd | 2039 | US"dane:fail", US"dane-required"); |
8d3dc239 | 2040 | # endif |
4b0fe319 | 2041 | return FAIL; |
0e66b3b6 | 2042 | } |
0e66b3b6 JH |
2043 | } |
2044 | #endif /*DANE*/ | |
2045 | ||
58c30e47 JH |
2046 | /* Make the TCP connection */ |
2047 | ||
74f1a423 JH |
2048 | sx->cctx.tls_ctx = NULL; |
2049 | sx->inblock.cctx = sx->outblock.cctx = &sx->cctx; | |
ee8b8090 | 2050 | sx->avoid_option = sx->peer_offered = smtp_peer_options = 0; |
58c30e47 | 2051 | |
4e48d56c | 2052 | #ifdef SUPPORT_PIPE_CONNECT |
fd6e2d18 JH |
2053 | if ( verify_check_given_host(CUSS &ob->hosts_pipe_connect, |
2054 | sx->conn_args.host) == OK) | |
2055 | ||
2056 | /* We don't find out the local ip address until the connect, so if | |
2057 | the helo string might use it avoid doing early-pipelining. */ | |
2058 | ||
2059 | if ( !sx->helo_data | |
2060 | || !Ustrstr(sx->helo_data, "$sending_ip_address") | |
2061 | || Ustrstr(sx->helo_data, "def:sending_ip_address") | |
2062 | ) | |
58c30e47 | 2063 | { |
fd6e2d18 JH |
2064 | sx->early_pipe_ok = TRUE; |
2065 | if ( read_ehlo_cache_entry(sx) | |
2066 | && sx->ehlo_resp.cleartext_features & OPTION_EARLY_PIPE) | |
2067 | { | |
2068 | DEBUG(D_transport) | |
2069 | debug_printf("Using cached cleartext PIPE_CONNECT\n"); | |
2070 | sx->early_pipe_active = TRUE; | |
2071 | sx->peer_offered = sx->ehlo_resp.cleartext_features; | |
2072 | } | |
58c30e47 | 2073 | } |
fd6e2d18 JH |
2074 | else DEBUG(D_transport) |
2075 | debug_printf("helo needs $sending_ip_address\n"); | |
58c30e47 | 2076 | |
ee8b8090 JH |
2077 | if (sx->early_pipe_active) |
2078 | sx->outblock.conn_args = &sx->conn_args; | |
2079 | else | |
2080 | #endif | |
2081 | { | |
2082 | if ((sx->cctx.sock = smtp_connect(&sx->conn_args, NULL)) < 0) | |
2083 | { | |
ee8b8090 JH |
2084 | set_errno_nohost(sx->addrlist, |
2085 | errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno, | |
b471ea6f | 2086 | sx->verify ? US strerror(errno) : NULL, |
ee8b8090 JH |
2087 | DEFER, FALSE); |
2088 | sx->send_quit = FALSE; | |
2089 | return DEFER; | |
2090 | } | |
2091 | } | |
41c7c167 PH |
2092 | /* Expand the greeting message while waiting for the initial response. (Makes |
2093 | sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is | |
2094 | delayed till here so that $sending_interface and $sending_port are set. */ | |
ee8b8090 JH |
2095 | /*XXX early-pipe: they still will not be. Is there any way to find out what they |
2096 | will be? Somehow I doubt it. */ | |
41c7c167 | 2097 | |
02b41d71 JH |
2098 | if (sx->helo_data) |
2099 | if (!(sx->helo_data = expand_string(sx->helo_data))) | |
e9166683 | 2100 | if (sx->verify) |
02b41d71 JH |
2101 | log_write(0, LOG_MAIN|LOG_PANIC, |
2102 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
2103 | sx->addrlist->address, expand_string_message); | |
2104 | ||
8c5d388a | 2105 | #ifdef SUPPORT_I18N |
d093f8e5 | 2106 | if (sx->helo_data) |
810d16ad | 2107 | { |
02b41d71 JH |
2108 | expand_string_message = NULL; |
2109 | if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data, | |
2110 | &expand_string_message)), | |
2111 | expand_string_message) | |
e9166683 | 2112 | if (sx->verify) |
02b41d71 JH |
2113 | log_write(0, LOG_MAIN|LOG_PANIC, |
2114 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
2115 | sx->addrlist->address, expand_string_message); | |
2116 | else | |
2117 | sx->helo_data = NULL; | |
810d16ad JH |
2118 | } |
2119 | #endif | |
41c7c167 | 2120 | |
0756eb3c PH |
2121 | /* The first thing is to wait for an initial OK response. The dreaded "goto" |
2122 | is nevertheless a reasonably clean way of programming this kind of logic, | |
2123 | where you want to escape on any error. */ | |
2124 | ||
d093f8e5 | 2125 | if (!sx->smtps) |
061b7ebd | 2126 | { |
4e48d56c | 2127 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2128 | if (sx->early_pipe_active) |
2129 | { | |
2130 | sx->pending_BANNER = TRUE; /* sync_responses() must eventually handle */ | |
2131 | sx->outblock.cmd_count = 1; | |
2132 | } | |
2133 | else | |
8d330698 | 2134 | #endif |
ee8b8090 JH |
2135 | { |
2136 | #ifdef TCP_QUICKACK | |
2137 | (void) setsockopt(sx->cctx.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, | |
2138 | sizeof(off)); | |
895fbaf2 | 2139 | #endif |
ee8b8090 JH |
2140 | if (!smtp_reap_banner(sx)) |
2141 | goto RESPONSE_FAILED; | |
2142 | } | |
0756eb3c | 2143 | |
0cbf2b82 | 2144 | #ifndef DISABLE_EVENT |
b30275b8 | 2145 | { |
805c9d53 | 2146 | uschar * s; |
ee8b8090 JH |
2147 | lookup_dnssec_authenticated = sx->conn_args.host->dnssec==DS_YES ? US"yes" |
2148 | : sx->conn_args.host->dnssec==DS_NO ? US"no" : NULL; | |
2149 | s = event_raise(sx->conn_args.tblock->event_action, US"smtp:connect", sx->buffer); | |
b30275b8 | 2150 | if (s) |
a7538db1 | 2151 | { |
d093f8e5 | 2152 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, |
b30275b8 | 2153 | string_sprintf("deferred by smtp:connect event expansion: %s", s), |
895fbaf2 | 2154 | DEFER, FALSE); |
a7538db1 JH |
2155 | yield = DEFER; |
2156 | goto SEND_QUIT; | |
2157 | } | |
b30275b8 | 2158 | } |
a7538db1 JH |
2159 | #endif |
2160 | ||
061b7ebd PP |
2161 | /* Now check if the helo_data expansion went well, and sign off cleanly if |
2162 | it didn't. */ | |
41c7c167 | 2163 | |
d093f8e5 | 2164 | if (!sx->helo_data) |
061b7ebd | 2165 | { |
d093f8e5 | 2166 | message = string_sprintf("failed to expand helo_data: %s", |
061b7ebd | 2167 | expand_string_message); |
d093f8e5 | 2168 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
061b7ebd PP |
2169 | yield = DEFER; |
2170 | goto SEND_QUIT; | |
2171 | } | |
41c7c167 PH |
2172 | } |
2173 | ||
0756eb3c | 2174 | /** Debugging without sending a message |
d093f8e5 | 2175 | sx->addrlist->transport_return = DEFER; |
0756eb3c PH |
2176 | goto SEND_QUIT; |
2177 | **/ | |
2178 | ||
2179 | /* Errors that occur after this point follow an SMTP command, which is | |
2180 | left in big_buffer by smtp_write_command() for use in error messages. */ | |
2181 | ||
2182 | smtp_command = big_buffer; | |
2183 | ||
2184 | /* Tell the remote who we are... | |
2185 | ||
2186 | February 1998: A convention has evolved that ESMTP-speaking MTAs include the | |
2187 | string "ESMTP" in their greeting lines, so make Exim send EHLO if the | |
2188 | greeting is of this form. The assumption was that the far end supports it | |
2189 | properly... but experience shows that there are some that give 5xx responses, | |
2190 | even though the banner includes "ESMTP" (there's a bloody-minded one that | |
2191 | says "ESMTP not spoken here"). Cope with that case. | |
2192 | ||
2193 | September 2000: Time has passed, and it seems reasonable now to always send | |
2194 | EHLO at the start. It is also convenient to make the change while installing | |
2195 | the TLS stuff. | |
2196 | ||
2197 | July 2003: Joachim Wieland met a broken server that advertises "PIPELINING" | |
2198 | but times out after sending MAIL FROM, RCPT TO and DATA all together. There | |
2199 | would be no way to send out the mails, so there is now a host list | |
2200 | "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the | |
2201 | PIPELINING problem as well. Maybe it can also be useful to cure other | |
2202 | problems with broken servers. | |
2203 | ||
2204 | Exim originally sent "Helo" at this point and ran for nearly a year that way. | |
2205 | Then somebody tried it with a Microsoft mailer... It seems that all other | |
2206 | mailers use upper case for some reason (the RFC is quite clear about case | |
2207 | independence) so, for peace of mind, I gave in. */ | |
2208 | ||
ee8b8090 | 2209 | sx->esmtp = verify_check_given_host(CUSS &ob->hosts_avoid_esmtp, sx->conn_args.host) != OK; |
0756eb3c | 2210 | |
061b7ebd PP |
2211 | /* Alas; be careful, since this goto is not an error-out, so conceivably |
2212 | we might set data between here and the target which we assume to exist | |
2213 | and be usable. I can see this coming back to bite us. */ | |
01603eec | 2214 | #ifndef DISABLE_TLS |
d093f8e5 | 2215 | if (sx->smtps) |
061b7ebd | 2216 | { |
14de8063 | 2217 | smtp_peer_options |= OPTION_TLS; |
061b7ebd | 2218 | suppress_tls = FALSE; |
ee8b8090 | 2219 | ob->tls_tempfail_tryclear = FALSE; |
061b7ebd PP |
2220 | smtp_command = US"SSL-on-connect"; |
2221 | goto TLS_NEGOTIATE; | |
2222 | } | |
a7538db1 | 2223 | #endif |
061b7ebd | 2224 | |
d093f8e5 | 2225 | if (sx->esmtp) |
0756eb3c | 2226 | { |
ee8b8090 | 2227 | if (smtp_write_command(sx, |
4e48d56c | 2228 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2229 | sx->early_pipe_active ? SCMD_BUFFER : |
2230 | #endif | |
2231 | SCMD_FLUSH, | |
2232 | "%s %s\r\n", sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0) | |
0756eb3c | 2233 | goto SEND_FAILED; |
d093f8e5 | 2234 | sx->esmtp_sent = TRUE; |
ee8b8090 | 2235 | |
4e48d56c | 2236 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 | 2237 | if (sx->early_pipe_active) |
0756eb3c | 2238 | { |
ee8b8090 JH |
2239 | sx->pending_EHLO = TRUE; |
2240 | ||
2241 | /* If we have too many authenticators to handle and might need to AUTH | |
2242 | for this transport, pipeline no further as we will need the | |
2243 | list of auth methods offered. Reap the banner and EHLO. */ | |
2244 | ||
2245 | if ( (ob->hosts_require_auth || ob->hosts_try_auth) | |
2246 | && f.smtp_in_early_pipe_no_auth) | |
895fbaf2 | 2247 | { |
ee8b8090 JH |
2248 | DEBUG(D_transport) debug_printf("may need to auth, so pipeline no further\n"); |
2249 | if (smtp_write_command(sx, SCMD_FLUSH, NULL) < 0) | |
2250 | goto SEND_FAILED; | |
2251 | if (sync_responses(sx, 2, 0) != 0) | |
2252 | { | |
2253 | HDEBUG(D_transport) | |
2254 | debug_printf("failed reaping pipelined cmd responses\n"); | |
2255 | goto RESPONSE_FAILED; | |
2256 | } | |
2257 | sx->early_pipe_active = FALSE; | |
895fbaf2 | 2258 | } |
0756eb3c | 2259 | } |
ee8b8090 | 2260 | else |
895fbaf2 | 2261 | #endif |
ee8b8090 JH |
2262 | if (!smtp_reap_ehlo(sx)) |
2263 | goto RESPONSE_FAILED; | |
0756eb3c PH |
2264 | } |
2265 | else | |
0756eb3c PH |
2266 | DEBUG(D_transport) |
2267 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
0756eb3c | 2268 | |
4e48d56c | 2269 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2270 | if (!sx->early_pipe_active) |
2271 | #endif | |
2272 | if (!sx->esmtp) | |
2273 | { | |
2274 | BOOL good_response; | |
2275 | int n = sizeof(sx->buffer); | |
2276 | uschar * rsp = sx->buffer; | |
a57ce043 | 2277 | |
ee8b8090 JH |
2278 | if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2) |
2279 | { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; } | |
895fbaf2 | 2280 | |
ee8b8090 JH |
2281 | if (smtp_write_command(sx, SCMD_FLUSH, "HELO %s\r\n", sx->helo_data) < 0) |
2282 | goto SEND_FAILED; | |
2283 | good_response = smtp_read_response(sx, rsp, n, '2', ob->command_timeout); | |
895fbaf2 | 2284 | #ifdef EXPERIMENTAL_DSN_INFO |
ee8b8090 | 2285 | sx->helo_response = string_copy(rsp); |
895fbaf2 | 2286 | #endif |
ee8b8090 | 2287 | if (!good_response) |
a57ce043 | 2288 | { |
ee8b8090 JH |
2289 | /* Handle special logging for a closed connection after HELO |
2290 | when had previously sent EHLO */ | |
2291 | ||
2292 | if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET)) | |
2293 | { | |
2294 | errno = ERRNO_SMTPCLOSED; | |
2295 | goto EHLOHELO_FAILED; | |
2296 | } | |
2297 | memmove(sx->buffer, rsp, Ustrlen(rsp)); | |
2298 | goto RESPONSE_FAILED; | |
a57ce043 | 2299 | } |
a57ce043 | 2300 | } |
2d14f397 | 2301 | |
d093f8e5 | 2302 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 2303 | { |
4e48d56c | 2304 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2305 | if (!sx->early_pipe_active) |
2306 | #endif | |
2307 | { | |
2308 | sx->peer_offered = ehlo_response(sx->buffer, | |
2309 | OPTION_TLS /* others checked later */ | |
4e48d56c | 2310 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2311 | | (sx->early_pipe_ok |
2312 | ? OPTION_IGNQ | |
2313 | | OPTION_CHUNKING | OPTION_PRDR | OPTION_DSN | OPTION_PIPE | OPTION_SIZE | |
2314 | #ifdef SUPPORT_I18N | |
2315 | | OPTION_UTF8 | |
2316 | #endif | |
2317 | | OPTION_EARLY_PIPE | |
2318 | : 0 | |
2319 | ) | |
2320 | #endif | |
2321 | ); | |
4e48d56c | 2322 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2323 | if (sx->early_pipe_ok) |
2324 | { | |
2325 | sx->ehlo_resp.cleartext_features = sx->peer_offered; | |
2326 | ||
2327 | if ( (sx->peer_offered & (OPTION_PIPE | OPTION_EARLY_PIPE)) | |
2328 | == (OPTION_PIPE | OPTION_EARLY_PIPE)) | |
2329 | { | |
2330 | DEBUG(D_transport) debug_printf("PIPE_CONNECT usable in future for this IP\n"); | |
2331 | sx->ehlo_resp.cleartext_auths = study_ehlo_auths(sx); | |
2332 | write_ehlo_cache_entry(sx); | |
2333 | } | |
2334 | } | |
2335 | #endif | |
2336 | } | |
f1513293 | 2337 | |
0756eb3c PH |
2338 | /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */ |
2339 | ||
01603eec | 2340 | #ifndef DISABLE_TLS |
14de8063 | 2341 | smtp_peer_options |= sx->peer_offered & OPTION_TLS; |
7ade712c | 2342 | #endif |
2d14f397 | 2343 | } |
0756eb3c PH |
2344 | } |
2345 | ||
57cc2785 JH |
2346 | /* For continuing deliveries down the same channel, having re-exec'd the socket |
2347 | is the standard input; for a socket held open from verify it is recorded | |
2348 | in the cutthrough context block. Either way we don't need to redo EHLO here | |
2349 | (but may need to do so for TLS - see below). | |
2350 | Set up the pointer to where subsequent commands will be left, for | |
2d14f397 | 2351 | error messages. Note that smtp_peer_options will have been |
0756eb3c PH |
2352 | set from the command line if they were set in the process that passed the |
2353 | connection on. */ | |
2354 | ||
895fbaf2 | 2355 | /*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c |
4c04137d | 2356 | as the continue goes via transport_pass_socket() and doublefork and exec. |
895fbaf2 JH |
2357 | It does not wait. Unclear how we keep separate host's responses |
2358 | separate - we could match up by host ip+port as a bodge. */ | |
2359 | ||
0756eb3c PH |
2360 | else |
2361 | { | |
74f1a423 | 2362 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
57cc2785 | 2363 | { |
74f1a423 | 2364 | sx->cctx = cutthrough.cctx; |
ee8b8090 | 2365 | sx->conn_args.host->port = sx->port = cutthrough.host.port; |
57cc2785 JH |
2366 | } |
2367 | else | |
2368 | { | |
74f1a423 JH |
2369 | sx->cctx.sock = 0; /* stdin */ |
2370 | sx->cctx.tls_ctx = NULL; | |
ee8b8090 | 2371 | smtp_port_for_connect(sx->conn_args.host, sx->port); /* Record the port that was used */ |
57cc2785 | 2372 | } |
74f1a423 | 2373 | sx->inblock.cctx = sx->outblock.cctx = &sx->cctx; |
0756eb3c | 2374 | smtp_command = big_buffer; |
02b41d71 | 2375 | sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */ |
875512a3 | 2376 | |
57cc2785 JH |
2377 | /* For a continued connection with TLS being proxied for us, or a |
2378 | held-open verify connection with TLS, nothing more to do. */ | |
875512a3 | 2379 | |
57cc2785 | 2380 | if ( continue_proxy_cipher |
74f1a423 JH |
2381 | || (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only |
2382 | && cutthrough.is_tls) | |
57cc2785 | 2383 | ) |
875512a3 JH |
2384 | { |
2385 | sx->peer_offered = smtp_peer_options; | |
7c576fca | 2386 | sx->pipelining_used = pipelining_active = !!(smtp_peer_options & OPTION_PIPE); |
57cc2785 JH |
2387 | HDEBUG(D_transport) debug_printf("continued connection, %s TLS\n", |
2388 | continue_proxy_cipher ? "proxied" : "verify conn with"); | |
875512a3 JH |
2389 | return OK; |
2390 | } | |
2391 | HDEBUG(D_transport) debug_printf("continued connection, no TLS\n"); | |
0756eb3c PH |
2392 | } |
2393 | ||
2394 | /* If TLS is available on this connection, whether continued or not, attempt to | |
2395 | start up a TLS session, unless the host is in hosts_avoid_tls. If successful, | |
2396 | send another EHLO - the server may give a different answer in secure mode. We | |
2397 | use a separate buffer for reading the response to STARTTLS so that if it is | |
2398 | negative, the original EHLO data is available for subsequent analysis, should | |
2399 | the client not be required to use TLS. If the response is bad, copy the buffer | |
2400 | for error analysis. */ | |
2401 | ||
01603eec | 2402 | #ifndef DISABLE_TLS |
14de8063 | 2403 | if ( smtp_peer_options & OPTION_TLS |
5130845b | 2404 | && !suppress_tls |
ee8b8090 | 2405 | && verify_check_given_host(CUSS &ob->hosts_avoid_tls, sx->conn_args.host) != OK |
e9166683 | 2406 | && ( !sx->verify |
ee8b8090 | 2407 | || verify_check_given_host(CUSS &ob->hosts_verify_avoid_tls, sx->conn_args.host) != OK |
02b41d71 | 2408 | ) ) |
0756eb3c PH |
2409 | { |
2410 | uschar buffer2[4096]; | |
ee8b8090 | 2411 | |
251b9eb4 | 2412 | if (smtp_write_command(sx, SCMD_FLUSH, "STARTTLS\r\n") < 0) |
0756eb3c PH |
2413 | goto SEND_FAILED; |
2414 | ||
4e48d56c | 2415 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2416 | /* If doing early-pipelining reap the banner and EHLO-response but leave |
2417 | the response for the STARTTLS we just sent alone. */ | |
2418 | ||
2419 | if (sx->early_pipe_active && sync_responses(sx, 2, 0) != 0) | |
2420 | { | |
2421 | HDEBUG(D_transport) | |
2422 | debug_printf("failed reaping pipelined cmd responses\n"); | |
2423 | goto RESPONSE_FAILED; | |
2424 | } | |
2425 | #endif | |
2426 | ||
0756eb3c PH |
2427 | /* If there is an I/O error, transmission of this message is deferred. If |
2428 | there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is | |
2429 | false, we also defer. However, if there is a temporary rejection of STARTTLS | |
2430 | and tls_tempfail_tryclear is true, or if there is an outright rejection of | |
2431 | STARTTLS, we carry on. This means we will try to send the message in clear, | |
2432 | unless the host is in hosts_require_tls (tested below). */ | |
2433 | ||
ee8b8090 | 2434 | if (!smtp_read_response(sx, buffer2, sizeof(buffer2), '2', ob->command_timeout)) |
0756eb3c | 2435 | { |
4b0fe319 JH |
2436 | if ( errno != 0 |
2437 | || buffer2[0] == 0 | |
ee8b8090 | 2438 | || (buffer2[0] == '4' && !ob->tls_tempfail_tryclear) |
4b0fe319 | 2439 | ) |
0dda4340 | 2440 | { |
d093f8e5 | 2441 | Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer)); |
9e7e0f6a | 2442 | sx->buffer[sizeof(sx->buffer)-1] = '\0'; |
0756eb3c | 2443 | goto RESPONSE_FAILED; |
0dda4340 | 2444 | } |
0756eb3c PH |
2445 | } |
2446 | ||
2447 | /* STARTTLS accepted: try to negotiate a TLS session. */ | |
2448 | ||
2449 | else | |
061b7ebd | 2450 | TLS_NEGOTIATE: |
0756eb3c | 2451 | { |
c05bdbd6 | 2452 | if (!tls_client_start(&sx->cctx, &sx->conn_args, sx->addrlist, &tls_out, &tls_errstr)) |
0756eb3c | 2453 | { |
74f1a423 JH |
2454 | /* TLS negotiation failed; give an error. From outside, this function may |
2455 | be called again to try in clear on a new connection, if the options permit | |
2456 | it for this host. */ | |
dca6d121 JH |
2457 | #ifdef USE_GNUTLS |
2458 | GNUTLS_CONN_FAILED: | |
2459 | #endif | |
fc243e94 | 2460 | DEBUG(D_tls) debug_printf("TLS session fail: %s\n", tls_errstr); |
74f1a423 | 2461 | |
c0635b6d | 2462 | # ifdef SUPPORT_DANE |
c05bdbd6 | 2463 | if (sx->conn_args.dane) |
c4b57fdd JH |
2464 | { |
2465 | log_write(0, LOG_MAIN, | |
cf0c6164 | 2466 | "DANE attempt failed; TLS connection to %s [%s]: %s", |
fc243e94 | 2467 | sx->conn_args.host->name, sx->conn_args.host->address, tls_errstr); |
8d3dc239 | 2468 | # ifndef DISABLE_EVENT |
ee8b8090 | 2469 | (void) event_raise(sx->conn_args.tblock->event_action, |
c4b57fdd | 2470 | US"dane:fail", US"validation-failure"); /* could do with better detail */ |
8d3dc239 | 2471 | # endif |
c4b57fdd | 2472 | } |
6ebd79ec JH |
2473 | # endif |
2474 | ||
de6273b4 | 2475 | errno = ERRNO_TLSFAILURE; |
fc243e94 | 2476 | message = string_sprintf("TLS session: %s", tls_errstr); |
d093f8e5 | 2477 | sx->send_quit = FALSE; |
0756eb3c PH |
2478 | goto TLS_FAILED; |
2479 | } | |
2480 | ||
2481 | /* TLS session is set up */ | |
2482 | ||
2d14f397 | 2483 | smtp_peer_options_wrap = smtp_peer_options; |
d7978c0f | 2484 | for (address_item * addr = sx->addrlist; addr; addr = addr->next) |
5ca2a9a1 PH |
2485 | if (addr->transport_return == PENDING_DEFER) |
2486 | { | |
817d9f57 | 2487 | addr->cipher = tls_out.cipher; |
9d1c15ef JH |
2488 | addr->ourcert = tls_out.ourcert; |
2489 | addr->peercert = tls_out.peercert; | |
817d9f57 | 2490 | addr->peerdn = tls_out.peerdn; |
018058b2 | 2491 | addr->ocsp = tls_out.ocsp; |
da40b1ec | 2492 | addr->tlsver = tls_out.ver; |
5ca2a9a1 | 2493 | } |
0756eb3c PH |
2494 | } |
2495 | } | |
2496 | ||
061b7ebd PP |
2497 | /* if smtps, we'll have smtp_command set to something else; always safe to |
2498 | reset it here. */ | |
2499 | smtp_command = big_buffer; | |
2500 | ||
41c7c167 PH |
2501 | /* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If |
2502 | helo_data is null, we are dealing with a connection that was passed from | |
2503 | another process, and so we won't have expanded helo_data above. We have to | |
2504 | expand it here. $sending_ip_address and $sending_port are set up right at the | |
2505 | start of the Exim process (in exim.c). */ | |
0756eb3c | 2506 | |
74f1a423 | 2507 | if (tls_out.active.sock >= 0) |
0756eb3c | 2508 | { |
ee8b8090 | 2509 | uschar * greeting_cmd; |
895fbaf2 | 2510 | |
ee8b8090 | 2511 | if (!sx->helo_data && !(sx->helo_data = expand_string(ob->helo_data))) |
41c7c167 | 2512 | { |
d093f8e5 JH |
2513 | uschar *message = string_sprintf("failed to expand helo_data: %s", |
2514 | expand_string_message); | |
2515 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
2516 | yield = DEFER; | |
2517 | goto SEND_QUIT; | |
41c7c167 PH |
2518 | } |
2519 | ||
4e48d56c | 2520 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2521 | /* For SMTPS there is no cleartext early-pipe; use the crypted permission bit. |
2522 | We're unlikely to get the group sent and delivered before the server sends its | |
2523 | banner, but it's still worth sending as a group. | |
2524 | For STARTTLS allow for cleartext early-pipe but no crypted early-pipe, but not | |
2525 | the reverse. */ | |
2526 | ||
2527 | if (sx->smtps ? sx->early_pipe_ok : sx->early_pipe_active) | |
2528 | { | |
2529 | sx->peer_offered = sx->ehlo_resp.crypted_features; | |
2530 | if ((sx->early_pipe_active = | |
2531 | !!(sx->ehlo_resp.crypted_features & OPTION_EARLY_PIPE))) | |
2532 | DEBUG(D_transport) debug_printf("Using cached crypted PIPE_CONNECT\n"); | |
2533 | } | |
2534 | #endif | |
2535 | ||
0d0e4455 | 2536 | /* For SMTPS we need to wait for the initial OK response. */ |
d093f8e5 | 2537 | if (sx->smtps) |
4e48d56c | 2538 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2539 | if (sx->early_pipe_active) |
2540 | { | |
2541 | sx->pending_BANNER = TRUE; | |
2542 | sx->outblock.cmd_count = 1; | |
2543 | } | |
2544 | else | |
895fbaf2 | 2545 | #endif |
ee8b8090 JH |
2546 | if (!smtp_reap_banner(sx)) |
2547 | goto RESPONSE_FAILED; | |
0d0e4455 | 2548 | |
ee8b8090 JH |
2549 | if (sx->lmtp) |
2550 | greeting_cmd = US"LHLO"; | |
2551 | else if (sx->esmtp) | |
2552 | greeting_cmd = US"EHLO"; | |
0d0e4455 PP |
2553 | else |
2554 | { | |
ee8b8090 | 2555 | greeting_cmd = US"HELO"; |
0d0e4455 PP |
2556 | DEBUG(D_transport) |
2557 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
061b7ebd PP |
2558 | } |
2559 | ||
ee8b8090 | 2560 | if (smtp_write_command(sx, |
4e48d56c | 2561 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2562 | sx->early_pipe_active ? SCMD_BUFFER : |
2563 | #endif | |
2564 | SCMD_FLUSH, | |
2565 | "%s %s\r\n", greeting_cmd, sx->helo_data) < 0) | |
0756eb3c | 2566 | goto SEND_FAILED; |
ee8b8090 | 2567 | |
4e48d56c | 2568 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2569 | if (sx->early_pipe_active) |
2570 | sx->pending_EHLO = TRUE; | |
2571 | else | |
895fbaf2 | 2572 | #endif |
ee8b8090 JH |
2573 | { |
2574 | if (!smtp_reap_ehlo(sx)) | |
fc243e94 JH |
2575 | #ifdef USE_GNUTLS |
2576 | { | |
2577 | /* The GnuTLS layer in Exim only spots a server-rejection of a client | |
2578 | cert late, under TLS1.3 - which means here; the first time we try to | |
2579 | receive crypted data. Treat it as if it was a connect-time failure. | |
2580 | See also the early-pipe equivalent... which will be hard; every call | |
2581 | to sync_responses will need to check the result. | |
2582 | It would be nicer to have GnuTLS check the cert during the handshake. | |
2583 | Can it do that, with all the flexibility we need? */ | |
2584 | ||
2585 | tls_errstr = US"error on first read"; | |
2586 | goto GNUTLS_CONN_FAILED; | |
2587 | } | |
2588 | #else | |
ee8b8090 | 2589 | goto RESPONSE_FAILED; |
fc243e94 | 2590 | #endif |
ee8b8090 JH |
2591 | smtp_peer_options = 0; |
2592 | } | |
0756eb3c PH |
2593 | } |
2594 | ||
2595 | /* If the host is required to use a secure channel, ensure that we | |
2596 | have one. */ | |
2597 | ||
d093f8e5 | 2598 | else if ( sx->smtps |
c0635b6d | 2599 | # ifdef SUPPORT_DANE |
c05bdbd6 | 2600 | || sx->conn_args.dane |
0e66b3b6 | 2601 | # endif |
ee8b8090 | 2602 | || verify_check_given_host(CUSS &ob->hosts_require_tls, sx->conn_args.host) == OK |
7a31d643 | 2603 | ) |
0756eb3c | 2604 | { |
9883af72 | 2605 | errno = ERRNO_TLSREQUIRED; |
c562fd30 | 2606 | message = string_sprintf("a TLS session is required, but %s", |
14de8063 | 2607 | smtp_peer_options & OPTION_TLS |
2d14f397 | 2608 | ? "an attempt to start TLS failed" : "the server did not offer TLS support"); |
8d3dc239 | 2609 | # if defined(SUPPORT_DANE) && !defined(DISABLE_EVENT) |
c05bdbd6 | 2610 | if (sx->conn_args.dane) |
ee8b8090 | 2611 | (void) event_raise(sx->conn_args.tblock->event_action, US"dane:fail", |
c4b57fdd JH |
2612 | smtp_peer_options & OPTION_TLS |
2613 | ? US"validation-failure" /* could do with better detail */ | |
2614 | : US"starttls-not-supported"); | |
2615 | # endif | |
0756eb3c PH |
2616 | goto TLS_FAILED; |
2617 | } | |
01603eec | 2618 | #endif /*DISABLE_TLS*/ |
0756eb3c PH |
2619 | |
2620 | /* If TLS is active, we have just started it up and re-done the EHLO command, | |
2621 | so its response needs to be analyzed. If TLS is not active and this is a | |
2622 | continued session down a previously-used socket, we haven't just done EHLO, so | |
2623 | we skip this. */ | |
2624 | ||
2625 | if (continue_hostname == NULL | |
01603eec | 2626 | #ifndef DISABLE_TLS |
74f1a423 | 2627 | || tls_out.active.sock >= 0 |
a7538db1 | 2628 | #endif |
0756eb3c PH |
2629 | ) |
2630 | { | |
d093f8e5 | 2631 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 2632 | { |
4e48d56c | 2633 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2634 | if (!sx->early_pipe_active) |
2635 | #endif | |
2636 | { | |
e9166683 | 2637 | sx->peer_offered = ehlo_response(sx->buffer, |
d093f8e5 | 2638 | 0 /* no TLS */ |
4e48d56c | 2639 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2640 | | (sx->lmtp && ob->lmtp_ignore_quota ? OPTION_IGNQ : 0) |
2641 | | OPTION_DSN | OPTION_PIPE | OPTION_SIZE | |
9883af72 | 2642 | | OPTION_CHUNKING | OPTION_PRDR | OPTION_UTF8 |
ee8b8090 JH |
2643 | | (tls_out.active.sock >= 0 ? OPTION_EARLY_PIPE : 0) /* not for lmtp */ |
2644 | ||
2645 | #else | |
2646 | ||
2647 | | (sx->lmtp && ob->lmtp_ignore_quota ? OPTION_IGNQ : 0) | |
14de8063 JH |
2648 | | OPTION_CHUNKING |
2649 | | OPTION_PRDR | |
ee8b8090 | 2650 | # ifdef SUPPORT_I18N |
14de8063 | 2651 | | (sx->addrlist->prop.utf8_msg ? OPTION_UTF8 : 0) |
d093f8e5 JH |
2652 | /*XXX if we hand peercaps on to continued-conn processes, |
2653 | must not depend on this addr */ | |
ee8b8090 | 2654 | # endif |
14de8063 JH |
2655 | | OPTION_DSN |
2656 | | OPTION_PIPE | |
ee8b8090 | 2657 | | (ob->size_addition >= 0 ? OPTION_SIZE : 0) |
8ac90765 | 2658 | #endif |
9094b84b | 2659 | ); |
4e48d56c | 2660 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2661 | if (tls_out.active.sock >= 0) |
2662 | sx->ehlo_resp.crypted_features = sx->peer_offered; | |
2663 | #endif | |
2664 | } | |
9094b84b | 2665 | |
2d14f397 JH |
2666 | /* Set for IGNOREQUOTA if the response to LHLO specifies support and the |
2667 | lmtp_ignore_quota option was set. */ | |
f1513293 | 2668 | |
14de8063 | 2669 | sx->igquotstr = sx->peer_offered & OPTION_IGNQ ? US" IGNOREQUOTA" : US""; |
f1513293 | 2670 | |
2d14f397 JH |
2671 | /* If the response to EHLO specified support for the SIZE parameter, note |
2672 | this, provided size_addition is non-negative. */ | |
f1513293 | 2673 | |
14de8063 | 2674 | smtp_peer_options |= sx->peer_offered & OPTION_SIZE; |
0756eb3c | 2675 | |
2d14f397 JH |
2676 | /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched |
2677 | the current host, esmtp will be false, so PIPELINING can never be used. If | |
2678 | the current host matches hosts_avoid_pipelining, don't do it. */ | |
0756eb3c | 2679 | |
14de8063 | 2680 | if ( sx->peer_offered & OPTION_PIPE |
ee8b8090 | 2681 | && verify_check_given_host(CUSS &ob->hosts_avoid_pipelining, sx->conn_args.host) != OK) |
14de8063 | 2682 | smtp_peer_options |= OPTION_PIPE; |
0756eb3c | 2683 | |
2d14f397 | 2684 | DEBUG(D_transport) debug_printf("%susing PIPELINING\n", |
14de8063 | 2685 | smtp_peer_options & OPTION_PIPE ? "" : "not "); |
0756eb3c | 2686 | |
14de8063 | 2687 | if ( sx->peer_offered & OPTION_CHUNKING |
ee8b8090 | 2688 | && verify_check_given_host(CUSS &ob->hosts_try_chunking, sx->conn_args.host) != OK) |
14de8063 | 2689 | sx->peer_offered &= ~OPTION_CHUNKING; |
f98442df | 2690 | |
14de8063 | 2691 | if (sx->peer_offered & OPTION_CHUNKING) |
ee8b8090 | 2692 | DEBUG(D_transport) debug_printf("CHUNKING usable\n"); |
0756eb3c | 2693 | |
8ccd00b1 | 2694 | #ifndef DISABLE_PRDR |
14de8063 | 2695 | if ( sx->peer_offered & OPTION_PRDR |
ee8b8090 | 2696 | && verify_check_given_host(CUSS &ob->hosts_try_prdr, sx->conn_args.host) != OK) |
14de8063 | 2697 | sx->peer_offered &= ~OPTION_PRDR; |
fd98a5c6 | 2698 | |
14de8063 | 2699 | if (sx->peer_offered & OPTION_PRDR) |
ee8b8090 | 2700 | DEBUG(D_transport) debug_printf("PRDR usable\n"); |
fd98a5c6 JH |
2701 | #endif |
2702 | ||
2d14f397 | 2703 | /* Note if the server supports DSN */ |
14de8063 | 2704 | smtp_peer_options |= sx->peer_offered & OPTION_DSN; |
2d14f397 | 2705 | DEBUG(D_transport) debug_printf("%susing DSN\n", |
14de8063 | 2706 | sx->peer_offered & OPTION_DSN ? "" : "not "); |
6c1c3d1d | 2707 | |
4e48d56c | 2708 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
2709 | if ( sx->early_pipe_ok |
2710 | && !sx->early_pipe_active | |
2711 | && tls_out.active.sock >= 0 | |
2712 | && smtp_peer_options & OPTION_PIPE | |
2713 | && ( sx->ehlo_resp.cleartext_features | sx->ehlo_resp.crypted_features) | |
2714 | & OPTION_EARLY_PIPE) | |
2715 | { | |
2716 | DEBUG(D_transport) debug_printf("PIPE_CONNECT usable in future for this IP\n"); | |
2717 | sx->ehlo_resp.crypted_auths = study_ehlo_auths(sx); | |
2718 | write_ehlo_cache_entry(sx); | |
2719 | } | |
2720 | #endif | |
2721 | ||
2d14f397 JH |
2722 | /* Note if the response to EHLO specifies support for the AUTH extension. |
2723 | If it has, check that this host is one we want to authenticate to, and do | |
2724 | the business. The host name and address must be available when the | |
2725 | authenticator's client driver is running. */ | |
0756eb3c | 2726 | |
ee8b8090 | 2727 | switch (yield = smtp_auth(sx)) |
2d14f397 JH |
2728 | { |
2729 | default: goto SEND_QUIT; | |
2730 | case OK: break; | |
2731 | case FAIL_SEND: goto SEND_FAILED; | |
2732 | case FAIL: goto RESPONSE_FAILED; | |
2733 | } | |
0756eb3c PH |
2734 | } |
2735 | } | |
7c576fca | 2736 | sx->pipelining_used = pipelining_active = !!(smtp_peer_options & OPTION_PIPE); |
0756eb3c PH |
2737 | |
2738 | /* The setting up of the SMTP call is now complete. Any subsequent errors are | |
2739 | message-specific. */ | |
2740 | ||
d093f8e5 | 2741 | sx->setting_up = FALSE; |
0756eb3c | 2742 | |
8c5d388a | 2743 | #ifdef SUPPORT_I18N |
d093f8e5 | 2744 | if (sx->addrlist->prop.utf8_msg) |
9094b84b | 2745 | { |
71c15846 JH |
2746 | uschar * s; |
2747 | ||
2748 | /* If the transport sets a downconversion mode it overrides any set by ACL | |
2749 | for the message. */ | |
2750 | ||
ee8b8090 | 2751 | if ((s = ob->utf8_downconvert)) |
71c15846 JH |
2752 | { |
2753 | if (!(s = expand_string(s))) | |
2754 | { | |
2755 | message = string_sprintf("failed to expand utf8_downconvert: %s", | |
2756 | expand_string_message); | |
2757 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
2758 | yield = DEFER; | |
2759 | goto SEND_QUIT; | |
2760 | } | |
2761 | switch (*s) | |
2762 | { | |
2763 | case '1': sx->addrlist->prop.utf8_downcvt = TRUE; | |
2764 | sx->addrlist->prop.utf8_downcvt_maybe = FALSE; | |
2765 | break; | |
2766 | case '0': sx->addrlist->prop.utf8_downcvt = FALSE; | |
2767 | sx->addrlist->prop.utf8_downcvt_maybe = FALSE; | |
2768 | break; | |
2769 | case '-': if (s[1] == '1') | |
2770 | { | |
2771 | sx->addrlist->prop.utf8_downcvt = FALSE; | |
2772 | sx->addrlist->prop.utf8_downcvt_maybe = TRUE; | |
2773 | } | |
2774 | break; | |
2775 | } | |
2776 | } | |
2777 | ||
d093f8e5 JH |
2778 | sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt |
2779 | && !sx->addrlist->prop.utf8_downcvt_maybe; | |
2780 | DEBUG(D_transport) if (!sx->utf8_needed) | |
59a286ef | 2781 | debug_printf("utf8: %s downconvert\n", |
d093f8e5 | 2782 | sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional"); |
9094b84b JH |
2783 | } |
2784 | ||
7ade712c | 2785 | /* If this is an international message we need the host to speak SMTPUTF8 */ |
14de8063 | 2786 | if (sx->utf8_needed && !(sx->peer_offered & OPTION_UTF8)) |
7ade712c JH |
2787 | { |
2788 | errno = ERRNO_UTF8_FWD; | |
2789 | goto RESPONSE_FAILED; | |
2790 | } | |
71c15846 | 2791 | #endif /*SUPPORT_I18N*/ |
7ade712c | 2792 | |
d093f8e5 JH |
2793 | return OK; |
2794 | ||
2795 | ||
2796 | { | |
2797 | int code; | |
d093f8e5 JH |
2798 | |
2799 | RESPONSE_FAILED: | |
eebcfa1c JH |
2800 | if (errno == ECONNREFUSED) /* first-read error on a TFO conn */ |
2801 | { | |
2802 | /* There is a testing facility for simulating a connection timeout, as I | |
2803 | can't think of any other way of doing this. It converts a connection | |
2804 | refused into a timeout if the timeout is set to 999999. This is done for | |
2805 | a 3whs connection in ip_connect(), but a TFO connection does not error | |
2806 | there - instead it gets ECONNREFUSED on the first data read. Tracking | |
2807 | that a TFO really was done is too hard, or we would set a | |
2808 | sx->pending_conn_done bit and test that in smtp_reap_banner() and | |
2809 | smtp_reap_ehlo(). That would let us also add the conn-timeout to the | |
2810 | cmd-timeout. */ | |
2811 | ||
2812 | if (f.running_in_test_harness && ob->connect_timeout == 999999) | |
2813 | errno = ETIMEDOUT; | |
2814 | set_errno_nohost(sx->addrlist, | |
2815 | errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno, | |
2816 | sx->verify ? US strerror(errno) : NULL, | |
2817 | DEFER, FALSE); | |
2818 | sx->send_quit = FALSE; | |
2819 | return DEFER; | |
2820 | } | |
2821 | ||
2822 | /* really an error on an SMTP read */ | |
d093f8e5 | 2823 | message = NULL; |
ee8b8090 | 2824 | sx->send_quit = check_response(sx->conn_args.host, &errno, sx->addrlist->more_errno, |
d093f8e5 | 2825 | sx->buffer, &code, &message, &pass_message); |
8ac90765 | 2826 | yield = DEFER; |
d093f8e5 | 2827 | goto FAILED; |
d093f8e5 JH |
2828 | |
2829 | SEND_FAILED: | |
d093f8e5 JH |
2830 | code = '4'; |
2831 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
ee8b8090 | 2832 | sx->conn_args.host->name, sx->conn_args.host->address, strerror(errno)); |
d093f8e5 | 2833 | sx->send_quit = FALSE; |
8ac90765 | 2834 | yield = DEFER; |
d093f8e5 | 2835 | goto FAILED; |
d093f8e5 | 2836 | |
de6273b4 JH |
2837 | EHLOHELO_FAILED: |
2838 | code = '4'; | |
2839 | message = string_sprintf("Remote host closed connection in response to %s" | |
2840 | " (EHLO response was: %s)", smtp_command, sx->buffer); | |
2841 | sx->send_quit = FALSE; | |
8ac90765 | 2842 | yield = DEFER; |
de6273b4 JH |
2843 | goto FAILED; |
2844 | ||
e5ab0ba9 JH |
2845 | /* This label is jumped to directly when a TLS negotiation has failed, |
2846 | or was not done for a host for which it is required. Values will be set | |
2847 | in message and errno, and setting_up will always be true. Treat as | |
2848 | a temporary error. */ | |
2849 | ||
01603eec | 2850 | #ifndef DISABLE_TLS |
d093f8e5 | 2851 | TLS_FAILED: |
9883af72 | 2852 | code = '4', yield = DEFER; |
de6273b4 | 2853 | goto FAILED; |
d093f8e5 JH |
2854 | #endif |
2855 | ||
2856 | /* The failure happened while setting up the call; see if the failure was | |
2857 | a 5xx response (this will either be on connection, or following HELO - a 5xx | |
e69636bc JH |
2858 | after EHLO causes it to try HELO). If so, and there are no more hosts to try, |
2859 | fail all addresses, as this host is never going to accept them. For other | |
2860 | errors during setting up (timeouts or whatever), defer all addresses, and | |
2861 | yield DEFER, so that the host is not tried again for a while. | |
2862 | ||
2863 | XXX This peeking for another host feels like a layering violation. We want | |
2864 | to note the host as unusable, but down here we shouldn't know if this was | |
2865 | the last host to try for the addr(list). Perhaps the upper layer should be | |
2866 | the one to do set_errno() ? The problem is that currently the addr is where | |
2867 | errno etc. are stashed, but until we run out of hosts to try the errors are | |
2868 | host-specific. Maybe we should enhance the host_item definition? */ | |
d093f8e5 | 2869 | |
de6273b4 | 2870 | FAILED: |
d093f8e5 | 2871 | sx->ok = FALSE; /* For when reached by GOTO */ |
e69636bc | 2872 | set_errno(sx->addrlist, errno, message, |
ee8b8090 | 2873 | sx->conn_args.host->next |
e69636bc JH |
2874 | ? DEFER |
2875 | : code == '5' | |
d093f8e5 | 2876 | #ifdef SUPPORT_I18N |
e69636bc | 2877 | || errno == ERRNO_UTF8_FWD |
d093f8e5 | 2878 | #endif |
e69636bc | 2879 | ? FAIL : DEFER, |
2d56d634 JH |
2880 | pass_message, |
2881 | errno == ECONNREFUSED ? NULL : sx->conn_args.host | |
d093f8e5 JH |
2882 | #ifdef EXPERIMENTAL_DSN_INFO |
2883 | , sx->smtp_greeting, sx->helo_response | |
2884 | #endif | |
2885 | ); | |
2886 | } | |
2887 | ||
2888 | ||
2889 | SEND_QUIT: | |
2890 | ||
2891 | if (sx->send_quit) | |
251b9eb4 | 2892 | (void)smtp_write_command(sx, SCMD_FLUSH, "QUIT\r\n"); |
d093f8e5 | 2893 | |
01603eec | 2894 | #ifndef DISABLE_TLS |
74f1a423 JH |
2895 | if (sx->cctx.tls_ctx) |
2896 | { | |
2897 | tls_close(sx->cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); | |
2898 | sx->cctx.tls_ctx = NULL; | |
2899 | } | |
d093f8e5 JH |
2900 | #endif |
2901 | ||
2902 | /* Close the socket, and return the appropriate value, first setting | |
2903 | works because the NULL setting is passed back to the calling process, and | |
2904 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
b7d3afcf | 2905 | */ |
d093f8e5 | 2906 | |
e1d04f48 | 2907 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
d093f8e5 JH |
2908 | if (sx->send_quit) |
2909 | { | |
74f1a423 JH |
2910 | shutdown(sx->cctx.sock, SHUT_WR); |
2911 | if (fcntl(sx->cctx.sock, F_SETFL, O_NONBLOCK) == 0) | |
d7978c0f JH |
2912 | for (int i = 16; read(sx->cctx.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && i > 0;) |
2913 | i--; /* drain socket */ | |
02b41d71 | 2914 | sx->send_quit = FALSE; |
d093f8e5 | 2915 | } |
74f1a423 JH |
2916 | (void)close(sx->cctx.sock); |
2917 | sx->cctx.sock = -1; | |
d093f8e5 JH |
2918 | |
2919 | #ifndef DISABLE_EVENT | |
ee8b8090 | 2920 | (void) event_raise(sx->conn_args.tblock->event_action, US"tcp:close", NULL); |
d093f8e5 JH |
2921 | #endif |
2922 | ||
2923 | continue_transport = NULL; | |
2924 | continue_hostname = NULL; | |
2925 | return yield; | |
2926 | } | |
2927 | ||
2928 | ||
9be4572b JH |
2929 | |
2930 | ||
2931 | /* Create the string of options that will be appended to the MAIL FROM: | |
2932 | in the connection context buffer */ | |
2933 | ||
2934 | static int | |
2935 | build_mailcmd_options(smtp_context * sx, address_item * addrlist) | |
2936 | { | |
2937 | uschar * p = sx->buffer; | |
2938 | address_item * addr; | |
2939 | int address_count; | |
2940 | ||
2941 | *p = 0; | |
2942 | ||
14de8063 | 2943 | /* If we know the receiving MTA supports the SIZE qualification, and we know it, |
9be4572b JH |
2944 | send it, adding something to the message size to allow for imprecision |
2945 | and things that get added en route. Exim keeps the number of lines | |
2946 | in a message, so we can give an accurate value for the original message, but we | |
2947 | need some additional to handle added headers. (Double "." characters don't get | |
2948 | included in the count.) */ | |
2949 | ||
14de8063 JH |
2950 | if ( message_size > 0 |
2951 | && sx->peer_offered & OPTION_SIZE && !(sx->avoid_option & OPTION_SIZE)) | |
9be4572b | 2952 | { |
328c5688 JH |
2953 | /*XXX problem here under spool_files_wireformat? |
2954 | Or just forget about lines? Or inflate by a fixed proportion? */ | |
2955 | ||
ee8b8090 | 2956 | sprintf(CS p, " SIZE=%d", message_size+message_linecount+(SOB sx->conn_args.ob)->size_addition); |
9be4572b JH |
2957 | while (*p) p++; |
2958 | } | |
2959 | ||
2960 | #ifndef DISABLE_PRDR | |
aded2255 | 2961 | /* If it supports Per-Recipient Data Responses, and we have more than one recipient, |
9be4572b JH |
2962 | request that */ |
2963 | ||
2964 | sx->prdr_active = FALSE; | |
14de8063 | 2965 | if (sx->peer_offered & OPTION_PRDR) |
d7978c0f | 2966 | for (address_item * addr = addrlist; addr; addr = addr->next) |
9be4572b JH |
2967 | if (addr->transport_return == PENDING_DEFER) |
2968 | { | |
2969 | for (addr = addr->next; addr; addr = addr->next) | |
2970 | if (addr->transport_return == PENDING_DEFER) | |
2971 | { /* at least two recipients to send */ | |
2972 | sx->prdr_active = TRUE; | |
2973 | sprintf(CS p, " PRDR"); p += 5; | |
2974 | break; | |
2975 | } | |
2976 | break; | |
2977 | } | |
2978 | #endif | |
2979 | ||
2980 | #ifdef SUPPORT_I18N | |
2981 | /* If it supports internationalised messages, and this meesage need that, | |
2982 | request it */ | |
2983 | ||
14de8063 | 2984 | if ( sx->peer_offered & OPTION_UTF8 |
9be4572b JH |
2985 | && addrlist->prop.utf8_msg |
2986 | && !addrlist->prop.utf8_downcvt | |
2987 | ) | |
f3ebb786 | 2988 | Ustrcpy(p, US" SMTPUTF8"), p += 9; |
9be4572b JH |
2989 | #endif |
2990 | ||
2991 | /* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */ | |
2992 | for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0; | |
2993 | addr && address_count < sx->max_rcpt; | |
2994 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2995 | { | |
2996 | address_count++; | |
2997 | if (!(addr->dsn_flags & rf_dsnlasthop)) | |
2998 | { | |
2999 | sx->dsn_all_lasthop = FALSE; | |
3000 | break; | |
3001 | } | |
3002 | } | |
3003 | ||
3004 | /* Add any DSN flags to the mail command */ | |
3005 | ||
14de8063 | 3006 | if (sx->peer_offered & OPTION_DSN && !sx->dsn_all_lasthop) |
9be4572b JH |
3007 | { |
3008 | if (dsn_ret == dsn_ret_hdrs) | |
f3ebb786 | 3009 | { Ustrcpy(p, US" RET=HDRS"); p += 9; } |
9be4572b | 3010 | else if (dsn_ret == dsn_ret_full) |
f3ebb786 | 3011 | { Ustrcpy(p, US" RET=FULL"); p += 9; } |
9be4572b JH |
3012 | |
3013 | if (dsn_envid) | |
3014 | { | |
3015 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid); | |
3016 | while (*p) p++; | |
3017 | } | |
3018 | } | |
3019 | ||
3020 | /* If an authenticated_sender override has been specified for this transport | |
3021 | instance, expand it. If the expansion is forced to fail, and there was already | |
3022 | an authenticated_sender for this message, the original value will be used. | |
3023 | Other expansion failures are serious. An empty result is ignored, but there is | |
3024 | otherwise no check - this feature is expected to be used with LMTP and other | |
3025 | cases where non-standard addresses (e.g. without domains) might be required. */ | |
3026 | ||
ee8b8090 | 3027 | if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->conn_args.ob)) |
9be4572b JH |
3028 | return ERROR; |
3029 | ||
3030 | return OK; | |
3031 | } | |
3032 | ||
3033 | ||
3034 | static void | |
3035 | build_rcptcmd_options(smtp_context * sx, const address_item * addr) | |
3036 | { | |
3037 | uschar * p = sx->buffer; | |
3038 | *p = 0; | |
3039 | ||
3040 | /* Add any DSN flags to the rcpt command */ | |
3041 | ||
14de8063 | 3042 | if (sx->peer_offered & OPTION_DSN && !(addr->dsn_flags & rf_dsnlasthop)) |
9be4572b JH |
3043 | { |
3044 | if (addr->dsn_flags & rf_dsnflags) | |
3045 | { | |
9be4572b JH |
3046 | BOOL first = TRUE; |
3047 | ||
f3ebb786 | 3048 | Ustrcpy(p, US" NOTIFY="); |
9be4572b | 3049 | while (*p) p++; |
d7978c0f | 3050 | for (int i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i]) |
9be4572b JH |
3051 | { |
3052 | if (!first) *p++ = ','; | |
3053 | first = FALSE; | |
3054 | Ustrcpy(p, rf_names[i]); | |
3055 | while (*p) p++; | |
3056 | } | |
3057 | } | |
3058 | ||
3059 | if (addr->dsn_orcpt) | |
3060 | { | |
3061 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s", | |
3062 | addr->dsn_orcpt); | |
3063 | while (*p) p++; | |
3064 | } | |
3065 | } | |
3066 | } | |
3067 | ||
3068 | ||
d9c3c8ed JH |
3069 | |
3070 | /* | |
3071 | Return: | |
e9166683 JH |
3072 | 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL) |
3073 | -1 MAIL response error | |
3074 | -2 any non-MAIL read i/o error | |
3075 | -3 non-MAIL response timeout | |
3076 | -4 internal error; channel still usable | |
3077 | -5 transmit failed | |
d9c3c8ed JH |
3078 | */ |
3079 | ||
3080 | int | |
3081 | smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield) | |
3082 | { | |
3083 | address_item * addr; | |
3084 | int address_count; | |
3085 | int rc; | |
3086 | ||
3087 | if (build_mailcmd_options(sx, sx->first_addr) != OK) | |
3088 | { | |
3089 | *yield = ERROR; | |
e9166683 | 3090 | return -4; |
d9c3c8ed JH |
3091 | } |
3092 | ||
3093 | /* From here until we send the DATA command, we can make use of PIPELINING | |
3094 | if the server host supports it. The code has to be able to check the responses | |
3095 | at any point, for when the buffer fills up, so we write it totally generally. | |
3096 | When PIPELINING is off, each command written reports that it has flushed the | |
3097 | buffer. */ | |
3098 | ||
3099 | sx->pending_MAIL = TRUE; /* The block starts with MAIL */ | |
3100 | ||
3101 | { | |
3102 | uschar * s = sx->from_addr; | |
3103 | #ifdef SUPPORT_I18N | |
3104 | uschar * errstr = NULL; | |
3105 | ||
3106 | /* If we must downconvert, do the from-address here. Remember we had to | |
3107 | for the to-addresses (done below), and also (ugly) for re-doing when building | |
3108 | the delivery log line. */ | |
3109 | ||
3110 | if ( sx->addrlist->prop.utf8_msg | |
14de8063 | 3111 | && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & OPTION_UTF8)) |
d9c3c8ed JH |
3112 | ) |
3113 | { | |
3114 | if (s = string_address_utf8_to_alabel(s, &errstr), errstr) | |
3115 | { | |
3116 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE); | |
3117 | *yield = ERROR; | |
e9166683 | 3118 | return -4; |
d9c3c8ed JH |
3119 | } |
3120 | setflag(sx->addrlist, af_utf8_downcvt); | |
3121 | } | |
3122 | #endif | |
3123 | ||
251b9eb4 | 3124 | rc = smtp_write_command(sx, pipelining_active ? SCMD_BUFFER : SCMD_FLUSH, |
d9c3c8ed JH |
3125 | "MAIL FROM:<%s>%s\r\n", s, sx->buffer); |
3126 | } | |
3127 | ||
3128 | mail_command = string_copy(big_buffer); /* Save for later error message */ | |
3129 | ||
3130 | switch(rc) | |
3131 | { | |
3132 | case -1: /* Transmission error */ | |
e9166683 | 3133 | return -5; |
d9c3c8ed | 3134 | |
df5b41e3 | 3135 | case +1: /* Cmd was sent */ |
251b9eb4 | 3136 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', |
ee8b8090 | 3137 | (SOB sx->conn_args.ob)->command_timeout)) |
d9c3c8ed JH |
3138 | { |
3139 | if (errno == 0 && sx->buffer[0] == '4') | |
3140 | { | |
3141 | errno = ERRNO_MAIL4XX; | |
3142 | sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
3143 | } | |
3144 | return -1; | |
3145 | } | |
3146 | sx->pending_MAIL = FALSE; | |
3147 | break; | |
e9166683 JH |
3148 | |
3149 | /* otherwise zero: command queued for pipeline */ | |
d9c3c8ed JH |
3150 | } |
3151 | ||
3152 | /* Pass over all the relevant recipient addresses for this host, which are the | |
3153 | ones that have status PENDING_DEFER. If we are using PIPELINING, we can send | |
3154 | several before we have to read the responses for those seen so far. This | |
3155 | checking is done by a subroutine because it also needs to be done at the end. | |
3156 | Send only up to max_rcpt addresses at a time, leaving next_addr pointing to | |
3157 | the next one if not all are sent. | |
3158 | ||
3159 | In the MUA wrapper situation, we want to flush the PIPELINING buffer for the | |
3160 | last address because we want to abort if any recipients have any kind of | |
3161 | problem, temporary or permanent. We know that all recipient addresses will have | |
3162 | the PENDING_DEFER status, because only one attempt is ever made, and we know | |
e9166683 JH |
3163 | that max_rcpt will be large, so all addresses will be done at once. |
3164 | ||
3165 | For verify we flush the pipeline after any (the only) rcpt address. */ | |
d9c3c8ed JH |
3166 | |
3167 | for (addr = sx->first_addr, address_count = 0; | |
3168 | addr && address_count < sx->max_rcpt; | |
3169 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
3170 | { | |
3171 | int count; | |
3172 | BOOL no_flush; | |
3173 | uschar * rcpt_addr; | |
3174 | ||
14de8063 | 3175 | addr->dsn_aware = sx->peer_offered & OPTION_DSN |
d9c3c8ed JH |
3176 | ? dsn_support_yes : dsn_support_no; |
3177 | ||
3178 | address_count++; | |
4c2471ca JH |
3179 | no_flush = pipelining_active && !sx->verify |
3180 | && (!mua_wrapper || addr->next && address_count < sx->max_rcpt); | |
d9c3c8ed JH |
3181 | |
3182 | build_rcptcmd_options(sx, addr); | |
3183 | ||
3184 | /* Now send the RCPT command, and process outstanding responses when | |
3185 | necessary. After a timeout on RCPT, we just end the function, leaving the | |
3186 | yield as OK, because this error can often mean that there is a problem with | |
3187 | just one address, so we don't want to delay the host. */ | |
3188 | ||
ee8b8090 | 3189 | rcpt_addr = transport_rcpt_address(addr, sx->conn_args.tblock->rcpt_include_affixes); |
d9c3c8ed JH |
3190 | |
3191 | #ifdef SUPPORT_I18N | |
3192 | if ( testflag(sx->addrlist, af_utf8_downcvt) | |
3193 | && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL)) | |
3194 | ) | |
3195 | { | |
3196 | /*XXX could we use a per-address errstr here? Not fail the whole send? */ | |
3197 | errno = ERRNO_EXPANDFAIL; | |
e9166683 | 3198 | return -5; /*XXX too harsh? */ |
d9c3c8ed JH |
3199 | } |
3200 | #endif | |
3201 | ||
251b9eb4 | 3202 | count = smtp_write_command(sx, no_flush ? SCMD_BUFFER : SCMD_FLUSH, |
4e910c01 | 3203 | "RCPT TO:<%s>%s%s\r\n", rcpt_addr, sx->igquotstr, sx->buffer); |
d9c3c8ed | 3204 | |
e9166683 | 3205 | if (count < 0) return -5; |
d9c3c8ed JH |
3206 | if (count > 0) |
3207 | { | |
df5b41e3 | 3208 | switch(sync_responses(sx, count, 0)) |
d9c3c8ed JH |
3209 | { |
3210 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ | |
3211 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e9166683 | 3212 | break; |
d9c3c8ed JH |
3213 | |
3214 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ | |
3215 | if (!sx->lmtp) /* can't tell about progress yet */ | |
3216 | sx->completed_addr = TRUE; | |
3217 | case 0: /* No 2xx or 5xx, but no probs */ | |
3218 | break; | |
3219 | ||
e9166683 JH |
3220 | case -1: return -3; /* Timeout on RCPT */ |
3221 | case -2: return -2; /* non-MAIL read i/o error */ | |
3222 | default: return -1; /* any MAIL error */ | |
ee8b8090 | 3223 | |
4e48d56c | 3224 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 | 3225 | case -4: return -1; /* non-2xx for pipelined banner or EHLO */ |
fc243e94 | 3226 | case -5: return -1; /* TLS first-read error */ |
ee8b8090 | 3227 | #endif |
d9c3c8ed JH |
3228 | } |
3229 | sx->pending_MAIL = FALSE; /* Dealt with MAIL */ | |
3230 | } | |
3231 | } /* Loop for next address */ | |
3232 | ||
3233 | sx->next_addr = addr; | |
3234 | return 0; | |
3235 | } | |
3236 | ||
3237 | ||
01603eec | 3238 | #ifndef DISABLE_TLS |
875512a3 JH |
3239 | /***************************************************** |
3240 | * Proxy TLS connection for another transport process * | |
3241 | ******************************************************/ | |
3242 | /* | |
d097cc73 JH |
3243 | Close the unused end of the pipe, fork once more, then use the given buffer |
3244 | as a staging area, and select on both the given fd and the TLS'd client-fd for | |
3245 | data to read (per the coding in ip_recv() and fd_ready() this is legitimate). | |
3246 | Do blocking full-size writes, and reads under a timeout. Once both input | |
3247 | channels are closed, exit the process. | |
875512a3 JH |
3248 | |
3249 | Arguments: | |
74f1a423 | 3250 | ct_ctx tls context |
57cc2785 JH |
3251 | buf space to use for buffering |
3252 | bufsiz size of buffer | |
d097cc73 | 3253 | pfd pipe filedescriptor array; [0] is comms to proxied process |
875512a3 | 3254 | timeout per-read timeout, seconds |
1d1e7973 JH |
3255 | |
3256 | Does not return. | |
875512a3 JH |
3257 | */ |
3258 | ||
57cc2785 | 3259 | void |
74f1a423 JH |
3260 | smtp_proxy_tls(void * ct_ctx, uschar * buf, size_t bsize, int * pfd, |
3261 | int timeout) | |
875512a3 | 3262 | { |
e47252f5 | 3263 | fd_set rfds, efds; |
74f1a423 | 3264 | int max_fd = MAX(pfd[0], tls_out.active.sock) + 1; |
d7978c0f | 3265 | int rc, i; |
875512a3 | 3266 | |
d097cc73 JH |
3267 | close(pfd[1]); |
3268 | if ((rc = fork())) | |
3269 | { | |
3270 | DEBUG(D_transport) debug_printf("proxy-proc final-pid %d\n", rc); | |
3271 | _exit(rc < 0 ? EXIT_FAILURE : EXIT_SUCCESS); | |
3272 | } | |
3273 | ||
9f01e50d | 3274 | testharness_pause_ms(100); /* let parent debug out */ |
875512a3 | 3275 | set_process_info("proxying TLS connection for continued transport"); |
e47252f5 | 3276 | FD_ZERO(&rfds); |
74f1a423 | 3277 | FD_SET(tls_out.active.sock, &rfds); |
d097cc73 | 3278 | FD_SET(pfd[0], &rfds); |
875512a3 | 3279 | |
d7978c0f | 3280 | for (int fd_bits = 3; fd_bits; ) |
875512a3 JH |
3281 | { |
3282 | time_t time_left = timeout; | |
3283 | time_t time_start = time(NULL); | |
3284 | ||
3285 | /* wait for data */ | |
e47252f5 | 3286 | efds = rfds; |
875512a3 JH |
3287 | do |
3288 | { | |
3289 | struct timeval tv = { time_left, 0 }; | |
3290 | ||
e47252f5 JH |
3291 | rc = select(max_fd, |
3292 | (SELECT_ARG2_TYPE *)&rfds, NULL, (SELECT_ARG2_TYPE *)&efds, &tv); | |
875512a3 JH |
3293 | |
3294 | if (rc < 0 && errno == EINTR) | |
3295 | if ((time_left -= time(NULL) - time_start) > 0) continue; | |
3296 | ||
3297 | if (rc <= 0) | |
3298 | { | |
3299 | DEBUG(D_transport) if (rc == 0) debug_printf("%s: timed out\n", __FUNCTION__); | |
d097cc73 | 3300 | goto done; |
875512a3 | 3301 | } |
e47252f5 | 3302 | |
74f1a423 | 3303 | if (FD_ISSET(tls_out.active.sock, &efds) || FD_ISSET(pfd[0], &efds)) |
e47252f5 JH |
3304 | { |
3305 | DEBUG(D_transport) debug_printf("select: exceptional cond on %s fd\n", | |
d097cc73 JH |
3306 | FD_ISSET(pfd[0], &efds) ? "proxy" : "tls"); |
3307 | goto done; | |
e47252f5 | 3308 | } |
875512a3 | 3309 | } |
74f1a423 | 3310 | while (rc < 0 || !(FD_ISSET(tls_out.active.sock, &rfds) || FD_ISSET(pfd[0], &rfds))); |
875512a3 JH |
3311 | |
3312 | /* handle inbound data */ | |
74f1a423 JH |
3313 | if (FD_ISSET(tls_out.active.sock, &rfds)) |
3314 | if ((rc = tls_read(ct_ctx, buf, bsize)) <= 0) | |
875512a3 JH |
3315 | { |
3316 | fd_bits &= ~1; | |
74f1a423 | 3317 | FD_CLR(tls_out.active.sock, &rfds); |
d097cc73 | 3318 | shutdown(pfd[0], SHUT_WR); |
e47252f5 | 3319 | timeout = 5; |
875512a3 JH |
3320 | } |
3321 | else | |
3322 | { | |
d7978c0f | 3323 | for (int nbytes = 0; rc - nbytes > 0; nbytes += i) |
d097cc73 | 3324 | if ((i = write(pfd[0], buf + nbytes, rc - nbytes)) < 0) goto done; |
875512a3 JH |
3325 | } |
3326 | else if (fd_bits & 1) | |
74f1a423 | 3327 | FD_SET(tls_out.active.sock, &rfds); |
875512a3 JH |
3328 | |
3329 | /* handle outbound data */ | |
d097cc73 JH |
3330 | if (FD_ISSET(pfd[0], &rfds)) |
3331 | if ((rc = read(pfd[0], buf, bsize)) <= 0) | |
875512a3 | 3332 | { |
e47252f5 | 3333 | fd_bits = 0; |
74f1a423 | 3334 | tls_close(ct_ctx, TLS_SHUTDOWN_NOWAIT); |
c645dd29 | 3335 | ct_ctx = NULL; |
875512a3 JH |
3336 | } |
3337 | else | |
3338 | { | |
d7978c0f | 3339 | for (int nbytes = 0; rc - nbytes > 0; nbytes += i) |
74f1a423 | 3340 | if ((i = tls_write(ct_ctx, buf + nbytes, rc - nbytes, FALSE)) < 0) |
d097cc73 | 3341 | goto done; |
875512a3 JH |
3342 | } |
3343 | else if (fd_bits & 2) | |
d097cc73 | 3344 | FD_SET(pfd[0], &rfds); |
875512a3 | 3345 | } |
d097cc73 JH |
3346 | |
3347 | done: | |
9f01e50d | 3348 | testharness_pause_ms(100); /* let logging complete */ |
d097cc73 | 3349 | exim_exit(0, US"TLS proxy"); |
875512a3 JH |
3350 | } |
3351 | #endif | |
3352 | ||
3353 | ||
d093f8e5 JH |
3354 | /************************************************* |
3355 | * Deliver address list to given host * | |
3356 | *************************************************/ | |
3357 | ||
3358 | /* If continue_hostname is not null, we get here only when continuing to | |
3359 | deliver down an existing channel. The channel was passed as the standard | |
3360 | input. TLS is never active on a passed channel; the previous process always | |
3361 | closes it down before passing the connection on. | |
3362 | ||
3363 | Otherwise, we have to make a connection to the remote host, and do the | |
3364 | initial protocol exchange. | |
3365 | ||
3366 | When running as an MUA wrapper, if the sender or any recipient is rejected, | |
3367 | temporarily or permanently, we force failure for all recipients. | |
3368 | ||
3369 | Arguments: | |
3370 | addrlist chain of potential addresses to deliver; only those whose | |
3371 | transport_return field is set to PENDING_DEFER are currently | |
3372 | being processed; others should be skipped - they have either | |
3373 | been delivered to an earlier host or IP address, or been | |
3374 | failed by one of them. | |
3375 | host host to deliver to | |
3376 | host_af AF_INET or AF_INET6 | |
a843a57e JH |
3377 | defport default TCP/IP port to use if host does not specify, in host |
3378 | byte order | |
d093f8e5 JH |
3379 | interface interface to bind to, or NULL |
3380 | tblock transport instance block | |
3381 | message_defer set TRUE if yield is OK, but all addresses were deferred | |
3382 | because of a non-recipient, non-host failure, that is, a | |
3383 | 4xx response to MAIL FROM, DATA, or ".". This is a defer | |
3384 | that is specific to the message. | |
3385 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for | |
3386 | a second attempt after TLS initialization fails | |
3387 | ||
3388 | Returns: OK - the connection was made and the delivery attempted; | |
3389 | the result for each address is in its data block. | |
3390 | DEFER - the connection could not be made, or something failed | |
3391 | while setting up the SMTP session, or there was a | |
3392 | non-message-specific error, such as a timeout. | |
3393 | ERROR - a filter command is specified for this transport, | |
3394 | and there was a problem setting it up; OR helo_data | |
3395 | or add_headers or authenticated_sender is specified | |
3396 | for this transport, and the string failed to expand | |
3397 | */ | |
3398 | ||
3399 | static int | |
a843a57e | 3400 | smtp_deliver(address_item *addrlist, host_item *host, int host_af, int defport, |
d093f8e5 JH |
3401 | uschar *interface, transport_instance *tblock, |
3402 | BOOL *message_defer, BOOL suppress_tls) | |
3403 | { | |
ee8b8090 | 3404 | smtp_transport_options_block * ob = SOB tblock->options_block; |
d093f8e5 | 3405 | int yield = OK; |
d093f8e5 JH |
3406 | int save_errno; |
3407 | int rc; | |
32dfdf8b | 3408 | struct timeval start_delivery_time; |
d093f8e5 | 3409 | |
d093f8e5 JH |
3410 | BOOL pass_message = FALSE; |
3411 | uschar *message = NULL; | |
3412 | uschar new_message_id[MESSAGE_ID_LENGTH + 1]; | |
d093f8e5 | 3413 | |
5169b5fa | 3414 | smtp_context * sx = store_get(sizeof(*sx), TRUE); /* tainted, for the data buffers */ |
d093f8e5 | 3415 | |
32dfdf8b | 3416 | gettimeofday(&start_delivery_time, NULL); |
d093f8e5 | 3417 | suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */ |
02b41d71 | 3418 | *message_defer = FALSE; |
d093f8e5 | 3419 | |
5169b5fa JH |
3420 | sx->addrlist = addrlist; |
3421 | sx->conn_args.host = host; | |
3422 | sx->conn_args.host_af = host_af, | |
3423 | sx->port = defport; | |
3424 | sx->conn_args.interface = interface; | |
3425 | sx->helo_data = NULL; | |
3426 | sx->conn_args.tblock = tblock; | |
3427 | sx->verify = FALSE; | |
3428 | sx->sync_addr = sx->first_addr = addrlist; | |
d093f8e5 | 3429 | |
9be4572b JH |
3430 | /* Get the channel set up ready for a message (MAIL FROM being the next |
3431 | SMTP command to send */ | |
3432 | ||
5169b5fa | 3433 | if ((rc = smtp_setup_conn(sx, suppress_tls)) != OK) |
d093f8e5 JH |
3434 | return rc; |
3435 | ||
0756eb3c PH |
3436 | /* If there is a filter command specified for this transport, we can now |
3437 | set it up. This cannot be done until the identify of the host is known. */ | |
3438 | ||
e9166683 | 3439 | if (tblock->filter_command) |
0756eb3c | 3440 | { |
9b989985 | 3441 | transport_filter_timeout = tblock->filter_timeout; |
0756eb3c PH |
3442 | |
3443 | /* On failure, copy the error to all addresses, abandon the SMTP call, and | |
3444 | yield ERROR. */ | |
3445 | ||
36d295f1 JH |
3446 | if (!transport_set_up_command(&transport_filter_argv, |
3447 | tblock->filter_command, TRUE, DEFER, addrlist, | |
3448 | string_sprintf("%.50s transport", tblock->name), NULL)) | |
0756eb3c | 3449 | { |
895fbaf2 JH |
3450 | set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER, |
3451 | FALSE); | |
0756eb3c PH |
3452 | yield = ERROR; |
3453 | goto SEND_QUIT; | |
3454 | } | |
48f1c853 JH |
3455 | |
3456 | if ( transport_filter_argv | |
3457 | && *transport_filter_argv | |
3458 | && **transport_filter_argv | |
5169b5fa | 3459 | && sx->peer_offered & OPTION_CHUNKING |
48f1c853 JH |
3460 | ) |
3461 | { | |
5169b5fa | 3462 | sx->peer_offered &= ~OPTION_CHUNKING; |
48f1c853 JH |
3463 | DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n"); |
3464 | } | |
0756eb3c PH |
3465 | } |
3466 | ||
0756eb3c PH |
3467 | /* For messages that have more than the maximum number of envelope recipients, |
3468 | we want to send several transactions down the same SMTP connection. (See | |
3469 | comments in deliver.c as to how this reconciles, heuristically, with | |
3470 | remote_max_parallel.) This optimization was added to Exim after the following | |
3471 | code was already working. The simplest way to put it in without disturbing the | |
3472 | code was to use a goto to jump back to this point when there is another | |
3473 | transaction to handle. */ | |
3474 | ||
3475 | SEND_MESSAGE: | |
5169b5fa JH |
3476 | sx->from_addr = return_path; |
3477 | sx->sync_addr = sx->first_addr; | |
3478 | sx->ok = FALSE; | |
3479 | sx->send_rset = TRUE; | |
3480 | sx->completed_addr = FALSE; | |
0756eb3c PH |
3481 | |
3482 | ||
57cc2785 JH |
3483 | /* If we are a continued-connection-after-verify the MAIL and RCPT |
3484 | commands were already sent; do not re-send but do mark the addrs as | |
3485 | having been accepted up to RCPT stage. A traditional cont-conn | |
3486 | always has a sequence number greater than one. */ | |
6b62e899 | 3487 | |
57cc2785 | 3488 | if (continue_hostname && continue_sequence == 1) |
0756eb3c | 3489 | { |
5169b5fa JH |
3490 | sx->peer_offered = smtp_peer_options; |
3491 | sx->pending_MAIL = FALSE; | |
3492 | sx->ok = TRUE; | |
3493 | sx->next_addr = NULL; | |
0756eb3c | 3494 | |
d7978c0f | 3495 | for (address_item * addr = addrlist; addr; addr = addr->next) |
57cc2785 JH |
3496 | addr->transport_return = PENDING_OK; |
3497 | } | |
3498 | else | |
0756eb3c | 3499 | { |
57cc2785 JH |
3500 | /* Initiate a message transfer. */ |
3501 | ||
5169b5fa | 3502 | switch(smtp_write_mail_and_rcpt_cmds(sx, &yield)) |
57cc2785 JH |
3503 | { |
3504 | case 0: break; | |
3505 | case -1: case -2: goto RESPONSE_FAILED; | |
3506 | case -3: goto END_OFF; | |
3507 | case -4: goto SEND_QUIT; | |
3508 | default: goto SEND_FAILED; | |
3509 | } | |
3510 | ||
3511 | /* If we are an MUA wrapper, abort if any RCPTs were rejected, either | |
3512 | permanently or temporarily. We should have flushed and synced after the last | |
3513 | RCPT. */ | |
3514 | ||
3515 | if (mua_wrapper) | |
3516 | { | |
4c2471ca JH |
3517 | address_item * a; |
3518 | unsigned cnt; | |
3519 | ||
5169b5fa | 3520 | for (a = sx->first_addr, cnt = 0; a && cnt < sx->max_rcpt; a = a->next, cnt++) |
4c2471ca | 3521 | if (a->transport_return != PENDING_OK) |
57cc2785 JH |
3522 | { |
3523 | /*XXX could we find a better errno than 0 here? */ | |
4c2471ca JH |
3524 | set_errno_nohost(addrlist, 0, a->message, FAIL, |
3525 | testflag(a, af_pass_message)); | |
5169b5fa | 3526 | sx->ok = FALSE; |
57cc2785 JH |
3527 | break; |
3528 | } | |
3529 | } | |
0756eb3c PH |
3530 | } |
3531 | ||
3532 | /* If ok is TRUE, we know we have got at least one good recipient, and must now | |
3533 | send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still | |
3534 | have a good recipient buffered up if we are pipelining. We don't want to waste | |
3535 | time sending DATA needlessly, so we only send it if either ok is TRUE or if we | |
6d5c916c JH |
3536 | are pipelining. The responses are all handled by sync_responses(). |
3537 | If using CHUNKING, do not send a BDAT until we know how big a chunk we want | |
3538 | to send is. */ | |
0756eb3c | 3539 | |
5169b5fa JH |
3540 | if ( !(sx->peer_offered & OPTION_CHUNKING) |
3541 | && (sx->ok || (pipelining_active && !mua_wrapper))) | |
0756eb3c | 3542 | { |
5169b5fa | 3543 | int count = smtp_write_command(sx, SCMD_FLUSH, "DATA\r\n"); |
6d5c916c | 3544 | |
0756eb3c | 3545 | if (count < 0) goto SEND_FAILED; |
5169b5fa | 3546 | switch(sync_responses(sx, count, sx->ok ? +1 : -1)) |
0756eb3c | 3547 | { |
5169b5fa JH |
3548 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
3549 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
0756eb3c PH |
3550 | break; |
3551 | ||
5169b5fa JH |
3552 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
3553 | if (!sx->lmtp) sx->completed_addr = TRUE; /* can't tell about progress yet */ | |
fc243e94 | 3554 | case 0: break; /* No 2xx or 5xx, but no probs */ |
0756eb3c | 3555 | |
fc243e94 | 3556 | case -1: goto END_OFF; /* Timeout on RCPT */ |
ee8b8090 | 3557 | |
4e48d56c | 3558 | #ifdef SUPPORT_PIPE_CONNECT |
fc243e94 | 3559 | case -5: /* TLS first-read error */ |
ee8b8090 JH |
3560 | case -4: HDEBUG(D_transport) |
3561 | debug_printf("failed reaping pipelined cmd responses\n"); | |
3562 | #endif | |
0756eb3c PH |
3563 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ |
3564 | } | |
0d9fa8c0 | 3565 | pipelining_active = FALSE; |
87cb4a16 | 3566 | data_command = string_copy(big_buffer); /* Save for later error message */ |
0756eb3c PH |
3567 | } |
3568 | ||
0756eb3c PH |
3569 | /* If there were no good recipients (but otherwise there have been no |
3570 | problems), just set ok TRUE, since we have handled address-specific errors | |
3571 | already. Otherwise, it's OK to send the message. Use the check/escape mechanism | |
3572 | for handling the SMTP dot-handling protocol, flagging to apply to headers as | |
3573 | well as body. Set the appropriate timeout value to be used for each chunk. | |
3574 | (Haven't been able to make it work using select() for writing yet.) */ | |
3575 | ||
5169b5fa JH |
3576 | if ( !sx->ok |
3577 | && (!(sx->peer_offered & OPTION_CHUNKING) || !pipelining_active)) | |
6d5c916c JH |
3578 | { |
3579 | /* Save the first address of the next batch. */ | |
5169b5fa | 3580 | sx->first_addr = sx->next_addr; |
6d5c916c | 3581 | |
5169b5fa | 3582 | sx->ok = TRUE; |
6d5c916c | 3583 | } |
ff5aac2b | 3584 | else |
0756eb3c | 3585 | { |
6b46ecc6 | 3586 | transport_ctx tctx = { |
5169b5fa | 3587 | .u = {.fd = sx->cctx.sock}, /*XXX will this need TLS info? */ |
ee8b8090 JH |
3588 | .tblock = tblock, |
3589 | .addr = addrlist, | |
3590 | .check_string = US".", | |
3591 | .escape_string = US"..", /* Escaping strings */ | |
3592 | .options = | |
3593 | topt_use_crlf | topt_escape_headers | |
6b46ecc6 JH |
3594 | | (tblock->body_only ? topt_no_headers : 0) |
3595 | | (tblock->headers_only ? topt_no_body : 0) | |
3596 | | (tblock->return_path_add ? topt_add_return_path : 0) | |
3597 | | (tblock->delivery_date_add ? topt_add_delivery_date : 0) | |
3598 | | (tblock->envelope_to_add ? topt_add_envelope_to : 0) | |
3599 | }; | |
3600 | ||
6d5c916c JH |
3601 | /* If using CHUNKING we need a callback from the generic transport |
3602 | support to us, for the sending of BDAT smtp commands and the reaping | |
3603 | of responses. The callback needs a whole bunch of state so set up | |
3604 | a transport-context structure to be passed around. */ | |
3605 | ||
5169b5fa | 3606 | if (sx->peer_offered & OPTION_CHUNKING) |
59932f7d | 3607 | { |
65de12cc | 3608 | tctx.check_string = tctx.escape_string = NULL; |
6d5c916c JH |
3609 | tctx.options |= topt_use_bdat; |
3610 | tctx.chunk_cb = smtp_chunk_cmd_callback; | |
5169b5fa JH |
3611 | sx->pending_BDAT = FALSE; |
3612 | sx->good_RCPT = sx->ok; | |
3613 | sx->cmd_count = 0; | |
3614 | tctx.smtp_context = sx; | |
59932f7d JH |
3615 | } |
3616 | else | |
65de12cc | 3617 | tctx.options |= topt_end_dot; |
59932f7d | 3618 | |
6d5c916c | 3619 | /* Save the first address of the next batch. */ |
5169b5fa | 3620 | sx->first_addr = sx->next_addr; |
6d5c916c | 3621 | |
e027f545 JH |
3622 | /* Responses from CHUNKING commands go in buffer. Otherwise, |
3623 | there has not been a response. */ | |
3624 | ||
5169b5fa | 3625 | sx->buffer[0] = 0; |
e027f545 | 3626 | |
0756eb3c | 3627 | sigalrm_seen = FALSE; |
ee8b8090 | 3628 | transport_write_timeout = ob->data_timeout; |
0756eb3c PH |
3629 | smtp_command = US"sending data block"; /* For error messages */ |
3630 | DEBUG(D_transport|D_v) | |
5169b5fa | 3631 | if (sx->peer_offered & OPTION_CHUNKING) |
6d5c916c JH |
3632 | debug_printf(" will write message using CHUNKING\n"); |
3633 | else | |
3634 | debug_printf(" SMTP>> writing message and terminating \".\"\n"); | |
0756eb3c | 3635 | transport_count = 0; |
a7538db1 | 3636 | |
80a47a2c | 3637 | #ifndef DISABLE_DKIM |
9f01e50d JH |
3638 | { |
3639 | # ifdef MEASURE_TIMING | |
3640 | struct timeval t0; | |
3641 | gettimeofday(&t0, NULL); | |
3642 | # endif | |
617d3932 JH |
3643 | dkim_exim_sign_init(); |
3644 | # ifdef EXPERIMENTAL_ARC | |
3645 | { | |
ee8b8090 | 3646 | uschar * s = ob->arc_sign; |
617d3932 JH |
3647 | if (s) |
3648 | { | |
ee8b8090 | 3649 | if (!(ob->dkim.arc_signspec = s = expand_string(s))) |
617d3932 | 3650 | { |
8768d548 | 3651 | if (!f.expand_string_forcedfail) |
587d831d JH |
3652 | { |
3653 | message = US"failed to expand arc_sign"; | |
5169b5fa | 3654 | sx->ok = FALSE; |
587d831d JH |
3655 | goto SEND_FAILED; |
3656 | } | |
3657 | } | |
3658 | else if (*s) | |
3659 | { | |
3660 | /* Ask dkim code to hash the body for ARC */ | |
3661 | (void) arc_ams_setup_sign_bodyhash(); | |
ee8b8090 | 3662 | ob->dkim.force_bodyhash = TRUE; |
617d3932 | 3663 | } |
617d3932 JH |
3664 | } |
3665 | } | |
3666 | # endif | |
9f01e50d JH |
3667 | # ifdef MEASURE_TIMING |
3668 | report_time_since(&t0, US"dkim_exim_sign_init (delta)"); | |
3669 | # endif | |
3670 | } | |
5169b5fa | 3671 | sx->ok = dkim_transport_write_message(&tctx, &ob->dkim, CUSS &message); |
4cd12fe9 | 3672 | #else |
5169b5fa | 3673 | sx->ok = transport_write_message(&tctx, 0); |
4cd12fe9 | 3674 | #endif |
0756eb3c PH |
3675 | |
3676 | /* transport_write_message() uses write() because it is called from other | |
3677 | places to write to non-sockets. This means that under some OS (e.g. Solaris) | |
3678 | it can exit with "Broken pipe" as its error. This really means that the | |
3679 | socket got closed at the far end. */ | |
3680 | ||
3681 | transport_write_timeout = 0; /* for subsequent transports */ | |
3682 | ||
3683 | /* Failure can either be some kind of I/O disaster (including timeout), | |
e027f545 JH |
3684 | or the failure of a transport filter or the expansion of added headers. |
3685 | Or, when CHUNKING, it can be a protocol-detected failure. */ | |
0756eb3c | 3686 | |
5169b5fa | 3687 | if (!sx->ok) |
b9df1829 JH |
3688 | if (message) goto SEND_FAILED; |
3689 | else goto RESPONSE_FAILED; | |
0756eb3c PH |
3690 | |
3691 | /* We used to send the terminating "." explicitly here, but because of | |
3692 | buffering effects at both ends of TCP/IP connections, you don't gain | |
3693 | anything by keeping it separate, so it might as well go in the final | |
3694 | data buffer for efficiency. This is now done by setting the topt_end_dot | |
3695 | flag above. */ | |
3696 | ||
3697 | smtp_command = US"end of data"; | |
3698 | ||
5169b5fa | 3699 | if (sx->peer_offered & OPTION_CHUNKING && sx->cmd_count > 1) |
6d5c916c JH |
3700 | { |
3701 | /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */ | |
5169b5fa | 3702 | switch(sync_responses(sx, sx->cmd_count-1, 0)) |
6d5c916c | 3703 | { |
5169b5fa JH |
3704 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
3705 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
fc243e94 | 3706 | break; |
6d5c916c | 3707 | |
5169b5fa JH |
3708 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
3709 | if (!sx->lmtp) sx->completed_addr = TRUE; /* can't tell about progress yet */ | |
fc243e94 | 3710 | case 0: break; /* No 2xx or 5xx, but no probs */ |
6d5c916c | 3711 | |
fc243e94 | 3712 | case -1: goto END_OFF; /* Timeout on RCPT */ |
ee8b8090 | 3713 | |
4e48d56c | 3714 | #ifdef SUPPORT_PIPE_CONNECT |
fc243e94 | 3715 | case -5: /* TLS first-read error */ |
ee8b8090 JH |
3716 | case -4: HDEBUG(D_transport) |
3717 | debug_printf("failed reaping pipelined cmd responses\n"); | |
3718 | #endif | |
fc243e94 | 3719 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ |
6d5c916c JH |
3720 | } |
3721 | } | |
3722 | ||
8ccd00b1 | 3723 | #ifndef DISABLE_PRDR |
ee8b8090 JH |
3724 | /* For PRDR we optionally get a partial-responses warning followed by the |
3725 | individual responses, before going on with the overall response. If we don't | |
3726 | get the warning then deal with per non-PRDR. */ | |
3727 | ||
5169b5fa | 3728 | if(sx->prdr_active) |
fd98a5c6 | 3729 | { |
5169b5fa JH |
3730 | sx->ok = smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '3', ob->final_timeout); |
3731 | if (!sx->ok && errno == 0) switch(sx->buffer[0]) | |
e027f545 | 3732 | { |
5169b5fa JH |
3733 | case '2': sx->prdr_active = FALSE; |
3734 | sx->ok = TRUE; | |
e027f545 JH |
3735 | break; |
3736 | case '4': errno = ERRNO_DATA4XX; | |
3737 | addrlist->more_errno |= | |
5169b5fa | 3738 | ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e027f545 JH |
3739 | break; |
3740 | } | |
fd98a5c6 JH |
3741 | } |
3742 | else | |
3743 | #endif | |
3744 | ||
3745 | /* For non-PRDR SMTP, we now read a single response that applies to the | |
3746 | whole message. If it is OK, then all the addresses have been delivered. */ | |
0756eb3c | 3747 | |
5169b5fa | 3748 | if (!sx->lmtp) |
e97957bc | 3749 | { |
5169b5fa | 3750 | sx->ok = smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', |
ee8b8090 | 3751 | ob->final_timeout); |
5169b5fa | 3752 | if (!sx->ok && errno == 0 && sx->buffer[0] == '4') |
e97957bc PH |
3753 | { |
3754 | errno = ERRNO_DATA4XX; | |
5169b5fa | 3755 | addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc PH |
3756 | } |
3757 | } | |
0756eb3c PH |
3758 | |
3759 | /* For LMTP, we get back a response for every RCPT command that we sent; | |
3760 | some may be accepted and some rejected. For those that get a response, their | |
3761 | status is fixed; any that are accepted have been handed over, even if later | |
3762 | responses crash - at least, that's how I read RFC 2033. | |
3763 | ||
3764 | If all went well, mark the recipient addresses as completed, record which | |
3765 | host/IPaddress they were delivered to, and cut out RSET when sending another | |
3766 | message down the same channel. Write the completed addresses to the journal | |
3767 | now so that they are recorded in case there is a crash of hardware or | |
3768 | software before the spool gets updated. Also record the final SMTP | |
3769 | confirmation if needed (for SMTP only). */ | |
3770 | ||
5169b5fa | 3771 | if (sx->ok) |
0756eb3c PH |
3772 | { |
3773 | int flag = '='; | |
32dfdf8b | 3774 | struct timeval delivery_time; |
0756eb3c | 3775 | int len; |
32dfdf8b | 3776 | uschar * conf = NULL; |
0d9fa8c0 | 3777 | |
32dfdf8b | 3778 | timesince(&delivery_time, &start_delivery_time); |
5169b5fa | 3779 | sx->send_rset = FALSE; |
0d9fa8c0 | 3780 | pipelining_active = FALSE; |
0756eb3c | 3781 | |
0756eb3c PH |
3782 | /* Set up confirmation if needed - applies only to SMTP */ |
3783 | ||
d68218c7 | 3784 | if ( |
0cbf2b82 | 3785 | #ifdef DISABLE_EVENT |
6c6d6e48 | 3786 | LOGGING(smtp_confirmation) && |
a7538db1 | 3787 | #endif |
5169b5fa | 3788 | !sx->lmtp |
d68218c7 | 3789 | ) |
0756eb3c | 3790 | { |
5169b5fa | 3791 | const uschar *s = string_printing(sx->buffer); |
55414b25 | 3792 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
5169b5fa | 3793 | conf = (s == sx->buffer)? US string_copy(s) : US s; |
0756eb3c PH |
3794 | } |
3795 | ||
fd98a5c6 | 3796 | /* Process all transported addresses - for LMTP or PRDR, read a status for |
0756eb3c PH |
3797 | each one. */ |
3798 | ||
5169b5fa | 3799 | for (address_item * addr = addrlist; addr != sx->first_addr; addr = addr->next) |
0756eb3c PH |
3800 | { |
3801 | if (addr->transport_return != PENDING_OK) continue; | |
3802 | ||
3803 | /* LMTP - if the response fails badly (e.g. timeout), use it for all the | |
3804 | remaining addresses. Otherwise, it's a return code for just the one | |
75def545 PH |
3805 | address. For temporary errors, add a retry item for the address so that |
3806 | it doesn't get tried again too soon. */ | |
0756eb3c | 3807 | |
8ccd00b1 | 3808 | #ifndef DISABLE_PRDR |
5169b5fa | 3809 | if (sx->lmtp || sx->prdr_active) |
fd98a5c6 | 3810 | #else |
5169b5fa | 3811 | if (sx->lmtp) |
fd98a5c6 | 3812 | #endif |
0756eb3c | 3813 | { |
5169b5fa | 3814 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', |
ee8b8090 | 3815 | ob->final_timeout)) |
0756eb3c | 3816 | { |
5169b5fa | 3817 | if (errno != 0 || sx->buffer[0] == 0) goto RESPONSE_FAILED; |
fd98a5c6 | 3818 | addr->message = string_sprintf( |
8ccd00b1 | 3819 | #ifndef DISABLE_PRDR |
5169b5fa | 3820 | "%s error after %s: %s", sx->prdr_active ? "PRDR":"LMTP", |
fd98a5c6 JH |
3821 | #else |
3822 | "LMTP error after %s: %s", | |
3823 | #endif | |
5169b5fa | 3824 | data_command, string_printing(sx->buffer)); |
75def545 | 3825 | setflag(addr, af_pass_message); /* Allow message to go to user */ |
5169b5fa | 3826 | if (sx->buffer[0] == '5') |
75def545 PH |
3827 | addr->transport_return = FAIL; |
3828 | else | |
3829 | { | |
e97957bc | 3830 | errno = ERRNO_DATA4XX; |
5169b5fa | 3831 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
75def545 | 3832 | addr->transport_return = DEFER; |
8ccd00b1 | 3833 | #ifndef DISABLE_PRDR |
5169b5fa | 3834 | if (!sx->prdr_active) |
fd98a5c6 JH |
3835 | #endif |
3836 | retry_add_item(addr, addr->address_retry_key, 0); | |
75def545 | 3837 | } |
0756eb3c PH |
3838 | continue; |
3839 | } | |
5169b5fa | 3840 | sx->completed_addr = TRUE; /* NOW we can set this flag */ |
6c6d6e48 | 3841 | if (LOGGING(smtp_confirmation)) |
c0ea85ab | 3842 | { |
5169b5fa | 3843 | const uschar *s = string_printing(sx->buffer); |
55414b25 | 3844 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
5169b5fa | 3845 | conf = (s == sx->buffer) ? US string_copy(s) : US s; |
c0ea85ab | 3846 | } |
0756eb3c PH |
3847 | } |
3848 | ||
3849 | /* SMTP, or success return from LMTP for this address. Pass back the | |
2d280592 | 3850 | actual host that was used. */ |
0756eb3c PH |
3851 | |
3852 | addr->transport_return = OK; | |
32dfdf8b JH |
3853 | addr->more_errno = delivery_time.tv_sec; |
3854 | addr->delivery_usec = delivery_time.tv_usec; | |
d427a7f9 | 3855 | addr->host_used = host; |
0756eb3c PH |
3856 | addr->special_action = flag; |
3857 | addr->message = conf; | |
7c576fca | 3858 | |
ee8b8090 JH |
3859 | if (tcp_out_fastopen) |
3860 | { | |
3861 | setflag(addr, af_tcp_fastopen_conn); | |
3862 | if (tcp_out_fastopen >= TFO_USED_NODATA) setflag(addr, af_tcp_fastopen); | |
3863 | if (tcp_out_fastopen >= TFO_USED_DATA) setflag(addr, af_tcp_fastopen_data); | |
3864 | } | |
5169b5fa | 3865 | if (sx->pipelining_used) setflag(addr, af_pipelining); |
4e48d56c | 3866 | #ifdef SUPPORT_PIPE_CONNECT |
5169b5fa | 3867 | if (sx->early_pipe_active) setflag(addr, af_early_pipe); |
ee8b8090 | 3868 | #endif |
8ccd00b1 | 3869 | #ifndef DISABLE_PRDR |
5169b5fa | 3870 | if (sx->prdr_active) setflag(addr, af_prdr_used); |
fd98a5c6 | 3871 | #endif |
5169b5fa | 3872 | if (sx->peer_offered & OPTION_CHUNKING) setflag(addr, af_chunking_used); |
0756eb3c PH |
3873 | flag = '-'; |
3874 | ||
8ccd00b1 | 3875 | #ifndef DISABLE_PRDR |
5169b5fa | 3876 | if (!sx->prdr_active) |
fd98a5c6 JH |
3877 | #endif |
3878 | { | |
3879 | /* Update the journal. For homonymic addresses, use the base address plus | |
3880 | the transport name. See lots of comments in deliver.c about the reasons | |
3881 | for the complications when homonyms are involved. Just carry on after | |
3882 | write error, as it may prove possible to update the spool file later. */ | |
4d8d62b9 | 3883 | |
fd98a5c6 | 3884 | if (testflag(addr, af_homonym)) |
5169b5fa | 3885 | sprintf(CS sx->buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); |
fd98a5c6 | 3886 | else |
5169b5fa | 3887 | sprintf(CS sx->buffer, "%.500s\n", addr->unique); |
4d8d62b9 | 3888 | |
5169b5fa JH |
3889 | DEBUG(D_deliver) debug_printf("S:journalling %s\n", sx->buffer); |
3890 | len = Ustrlen(CS sx->buffer); | |
3891 | if (write(journal_fd, sx->buffer, len) != len) | |
fd98a5c6 | 3892 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " |
5169b5fa | 3893 | "%s: %s", sx->buffer, strerror(errno)); |
fd98a5c6 | 3894 | } |
0756eb3c PH |
3895 | } |
3896 | ||
8ccd00b1 | 3897 | #ifndef DISABLE_PRDR |
5169b5fa | 3898 | if (sx->prdr_active) |
fd98a5c6 | 3899 | { |
2556b3c6 SA |
3900 | const uschar * overall_message; |
3901 | ||
fd98a5c6 JH |
3902 | /* PRDR - get the final, overall response. For any non-success |
3903 | upgrade all the address statuses. */ | |
2556b3c6 | 3904 | |
5169b5fa | 3905 | sx->ok = smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', |
ee8b8090 | 3906 | ob->final_timeout); |
5169b5fa | 3907 | if (!sx->ok) |
fd98a5c6 | 3908 | { |
5169b5fa | 3909 | if(errno == 0 && sx->buffer[0] == '4') |
fd98a5c6 JH |
3910 | { |
3911 | errno = ERRNO_DATA4XX; | |
5169b5fa | 3912 | addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
fd98a5c6 | 3913 | } |
5169b5fa JH |
3914 | for (address_item * addr = addrlist; addr != sx->first_addr; addr = addr->next) |
3915 | if (sx->buffer[0] == '5' || addr->transport_return == OK) | |
fd98a5c6 JH |
3916 | addr->transport_return = PENDING_OK; /* allow set_errno action */ |
3917 | goto RESPONSE_FAILED; | |
3918 | } | |
3919 | ||
2556b3c6 SA |
3920 | /* Append the overall response to the individual PRDR response for logging |
3921 | and update the journal, or setup retry. */ | |
3922 | ||
5169b5fa JH |
3923 | overall_message = string_printing(sx->buffer); |
3924 | for (address_item * addr = addrlist; addr != sx->first_addr; addr = addr->next) | |
2556b3c6 SA |
3925 | if (addr->transport_return == OK) |
3926 | addr->message = string_sprintf("%s\\n%s", addr->message, overall_message); | |
3927 | ||
5169b5fa | 3928 | for (address_item * addr = addrlist; addr != sx->first_addr; addr = addr->next) |
fd98a5c6 | 3929 | if (addr->transport_return == OK) |
9be4572b JH |
3930 | { |
3931 | if (testflag(addr, af_homonym)) | |
5169b5fa | 3932 | sprintf(CS sx->buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); |
9be4572b | 3933 | else |
5169b5fa | 3934 | sprintf(CS sx->buffer, "%.500s\n", addr->unique); |
9be4572b | 3935 | |
5169b5fa JH |
3936 | DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx->buffer); |
3937 | len = Ustrlen(CS sx->buffer); | |
3938 | if (write(journal_fd, sx->buffer, len) != len) | |
9be4572b | 3939 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " |
5169b5fa | 3940 | "%s: %s", sx->buffer, strerror(errno)); |
9be4572b JH |
3941 | } |
3942 | else if (addr->transport_return == DEFER) | |
3943 | retry_add_item(addr, addr->address_retry_key, -2); | |
fd98a5c6 JH |
3944 | } |
3945 | #endif | |
3946 | ||
0756eb3c PH |
3947 | /* Ensure the journal file is pushed out to disk. */ |
3948 | ||
54fc8428 | 3949 | if (EXIMfsync(journal_fd) < 0) |
0756eb3c PH |
3950 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", |
3951 | strerror(errno)); | |
3952 | } | |
3953 | } | |
3954 | ||
3955 | ||
3956 | /* Handle general (not specific to one address) failures here. The value of ok | |
3957 | is used to skip over this code on the falling through case. A timeout causes a | |
3958 | deferral. Other errors may defer or fail according to the response code, and | |
3959 | may set up a special errno value, e.g. after connection chopped, which is | |
3960 | assumed if errno == 0 and there is no text in the buffer. If control reaches | |
3961 | here during the setting up phase (i.e. before MAIL FROM) then always defer, as | |
3962 | the problem is not related to this specific message. */ | |
3963 | ||
5169b5fa | 3964 | if (!sx->ok) |
0756eb3c | 3965 | { |
895fbaf2 JH |
3966 | int code, set_rc; |
3967 | uschar * set_message; | |
0756eb3c PH |
3968 | |
3969 | RESPONSE_FAILED: | |
895fbaf2 JH |
3970 | { |
3971 | save_errno = errno; | |
3972 | message = NULL; | |
5169b5fa JH |
3973 | sx->send_quit = check_response(host, &save_errno, addrlist->more_errno, |
3974 | sx->buffer, &code, &message, &pass_message); | |
895fbaf2 JH |
3975 | goto FAILED; |
3976 | } | |
0756eb3c PH |
3977 | |
3978 | SEND_FAILED: | |
895fbaf2 JH |
3979 | { |
3980 | save_errno = errno; | |
3981 | code = '4'; | |
b9df1829 | 3982 | message = string_sprintf("send() to %s [%s] failed: %s", |
c0ad8edf | 3983 | host->name, host->address, message ? message : US strerror(save_errno)); |
5169b5fa | 3984 | sx->send_quit = FALSE; |
895fbaf2 JH |
3985 | goto FAILED; |
3986 | } | |
0756eb3c | 3987 | |
0756eb3c | 3988 | FAILED: |
9be4572b JH |
3989 | { |
3990 | BOOL message_error; | |
0756eb3c | 3991 | |
5169b5fa | 3992 | sx->ok = FALSE; /* For when reached by GOTO */ |
9be4572b | 3993 | set_message = message; |
0756eb3c | 3994 | |
e97957bc | 3995 | /* We want to handle timeouts after MAIL or "." and loss of connection after |
0756eb3c | 3996 | "." specially. They can indicate a problem with the sender address or with |
e97957bc PH |
3997 | the contents of the message rather than a real error on the connection. These |
3998 | cases are treated in the same way as a 4xx response. This next bit of code | |
3999 | does the classification. */ | |
0756eb3c | 4000 | |
e97957bc PH |
4001 | switch(save_errno) |
4002 | { | |
4003 | case 0: | |
4004 | case ERRNO_MAIL4XX: | |
4005 | case ERRNO_DATA4XX: | |
250b6871 JH |
4006 | message_error = TRUE; |
4007 | break; | |
0756eb3c | 4008 | |
e97957bc | 4009 | case ETIMEDOUT: |
250b6871 JH |
4010 | message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 || |
4011 | Ustrncmp(smtp_command,"end ",4) == 0; | |
4012 | break; | |
e97957bc PH |
4013 | |
4014 | case ERRNO_SMTPCLOSED: | |
250b6871 JH |
4015 | message_error = Ustrncmp(smtp_command,"end ",4) == 0; |
4016 | break; | |
e97957bc PH |
4017 | |
4018 | default: | |
250b6871 JH |
4019 | message_error = FALSE; |
4020 | break; | |
e97957bc | 4021 | } |
0756eb3c | 4022 | |
e97957bc | 4023 | /* Handle the cases that are treated as message errors. These are: |
0756eb3c | 4024 | |
e97957bc PH |
4025 | (a) negative response or timeout after MAIL |
4026 | (b) negative response after DATA | |
4027 | (c) negative response or timeout or dropped connection after "." | |
250b6871 | 4028 | (d) utf8 support required and not offered |
0756eb3c | 4029 | |
e97957bc PH |
4030 | It won't be a negative response or timeout after RCPT, as that is dealt |
4031 | with separately above. The action in all cases is to set an appropriate | |
4032 | error code for all the addresses, but to leave yield set to OK because the | |
4033 | host itself has not failed. Of course, it might in practice have failed | |
4034 | when we've had a timeout, but if so, we'll discover that at the next | |
4035 | delivery attempt. For a temporary error, set the message_defer flag, and | |
4036 | write to the logs for information if this is not the last host. The error | |
4037 | for the last host will be logged as part of the address's log line. */ | |
4038 | ||
4039 | if (message_error) | |
0756eb3c | 4040 | { |
e97957bc | 4041 | if (mua_wrapper) code = '5'; /* Force hard failure in wrapper mode */ |
e97957bc PH |
4042 | |
4043 | /* If there's an errno, the message contains just the identity of | |
4044 | the host. */ | |
4045 | ||
895fbaf2 JH |
4046 | if (code == '5') |
4047 | set_rc = FAIL; | |
4048 | else /* Anything other than 5 is treated as temporary */ | |
e97957bc | 4049 | { |
895fbaf2 | 4050 | set_rc = DEFER; |
e97957bc PH |
4051 | if (save_errno > 0) |
4052 | message = US string_sprintf("%s: %s", message, strerror(save_errno)); | |
ec62d0a9 | 4053 | |
5169b5fa | 4054 | write_logs(host, message, sx->first_addr ? sx->first_addr->basic_errno : 0); |
ec62d0a9 | 4055 | |
e97957bc PH |
4056 | *message_defer = TRUE; |
4057 | } | |
4058 | } | |
4059 | ||
4060 | /* Otherwise, we have an I/O error or a timeout other than after MAIL or | |
4061 | ".", or some other transportation error. We defer all addresses and yield | |
4062 | DEFER, except for the case of failed add_headers expansion, or a transport | |
4063 | filter failure, when the yield should be ERROR, to stop it trying other | |
4064 | hosts. */ | |
4065 | ||
4066 | else | |
4067 | { | |
4e48d56c | 4068 | #ifdef SUPPORT_PIPE_CONNECT |
ee8b8090 JH |
4069 | /* If we were early-pipelinng and the actual EHLO response did not match |
4070 | the cached value we assumed, we could have detected it and passed a | |
4071 | custom errno through to here. It would be nice to RSET and retry right | |
4072 | away, but to reliably do that we eould need an extra synch point before | |
4073 | we committed to data and that would discard half the gained roundrips. | |
4074 | Or we could summarily drop the TCP connection. but that is also ugly. | |
4075 | Instead, we ignore the possibility (having freshened the cache) and rely | |
4076 | on the server telling us with a nonmessage error if we have tried to | |
4077 | do something it no longer supports. */ | |
4078 | #endif | |
895fbaf2 | 4079 | set_rc = DEFER; |
e97957bc | 4080 | yield = (save_errno == ERRNO_CHHEADER_FAIL || |
ee8b8090 | 4081 | save_errno == ERRNO_FILTER_FAIL) ? ERROR : DEFER; |
0756eb3c PH |
4082 | } |
4083 | } | |
895fbaf2 JH |
4084 | |
4085 | set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host | |
4086 | #ifdef EXPERIMENTAL_DSN_INFO | |
5169b5fa | 4087 | , sx->smtp_greeting, sx->helo_response |
895fbaf2 JH |
4088 | #endif |
4089 | ); | |
0756eb3c PH |
4090 | } |
4091 | ||
4092 | ||
4093 | /* If all has gone well, send_quit will be set TRUE, implying we can end the | |
4094 | SMTP session tidily. However, if there were too many addresses to send in one | |
4095 | message (indicated by first_addr being non-NULL) we want to carry on with the | |
4096 | rest of them. Also, it is desirable to send more than one message down the SMTP | |
4097 | connection if there are several waiting, provided we haven't already sent so | |
4098 | many as to hit the configured limit. The function transport_check_waiting looks | |
4099 | for a waiting message and returns its id. Then transport_pass_socket tries to | |
4100 | set up a continued delivery by passing the socket on to another process. The | |
aded2255 | 4101 | variable send_rset is FALSE if a message has just been successfully transferred. |
0756eb3c PH |
4102 | |
4103 | If we are already sending down a continued channel, there may be further | |
4104 | addresses not yet delivered that are aimed at the same host, but which have not | |
4105 | been passed in this run of the transport. In this case, continue_more will be | |
4106 | true, and all we should do is send RSET if necessary, and return, leaving the | |
4107 | channel open. | |
4108 | ||
4109 | However, if no address was disposed of, i.e. all addresses got 4xx errors, we | |
4110 | do not want to continue with other messages down the same channel, because that | |
4111 | can lead to looping between two or more messages, all with the same, | |
4112 | temporarily failing address(es). [The retry information isn't updated yet, so | |
4113 | new processes keep on trying.] We probably also don't want to try more of this | |
4114 | message's addresses either. | |
4115 | ||
4116 | If we have started a TLS session, we have to end it before passing the | |
4117 | connection to a new process. However, not all servers can handle this (Exim | |
4118 | can), so we do not pass such a connection on if the host matches | |
4119 | hosts_nopass_tls. */ | |
4120 | ||
4121 | DEBUG(D_transport) | |
4122 | debug_printf("ok=%d send_quit=%d send_rset=%d continue_more=%d " | |
5169b5fa JH |
4123 | "yield=%d first_address is %sNULL\n", sx->ok, sx->send_quit, |
4124 | sx->send_rset, f.continue_more, yield, sx->first_addr ? "not " : ""); | |
0756eb3c | 4125 | |
5169b5fa | 4126 | if (sx->completed_addr && sx->ok && sx->send_quit) |
0756eb3c PH |
4127 | { |
4128 | BOOL more; | |
a39bd74d JB |
4129 | smtp_compare_t t_compare; |
4130 | ||
4131 | t_compare.tblock = tblock; | |
4132 | t_compare.current_sender_address = sender_address; | |
4133 | ||
5169b5fa | 4134 | if ( sx->first_addr != NULL |
8768d548 | 4135 | || f.continue_more |
875512a3 | 4136 | || ( |
01603eec | 4137 | #ifndef DISABLE_TLS |
74f1a423 | 4138 | ( tls_out.active.sock < 0 && !continue_proxy_cipher |
ee8b8090 | 4139 | || verify_check_given_host(CUSS &ob->hosts_nopass_tls, host) != OK |
5130845b | 4140 | ) |
0756eb3c | 4141 | && |
875512a3 | 4142 | #endif |
0756eb3c | 4143 | transport_check_waiting(tblock->name, host->name, |
a39bd74d JB |
4144 | tblock->connection_max_messages, new_message_id, &more, |
4145 | (oicf)smtp_are_same_identities, (void*)&t_compare) | |
5130845b | 4146 | ) ) |
0756eb3c PH |
4147 | { |
4148 | uschar *msg; | |
447d236c | 4149 | BOOL pass_message; |
0756eb3c | 4150 | |
5169b5fa JH |
4151 | if (sx->send_rset) |
4152 | if (! (sx->ok = smtp_write_command(sx, SCMD_FLUSH, "RSET\r\n") >= 0)) | |
0756eb3c PH |
4153 | { |
4154 | msg = US string_sprintf("send() to %s [%s] failed: %s", host->name, | |
9e7e0f6a | 4155 | host->address, strerror(errno)); |
5169b5fa | 4156 | sx->send_quit = FALSE; |
0756eb3c | 4157 | } |
5169b5fa | 4158 | else if (! (sx->ok = smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), |
ee8b8090 | 4159 | '2', ob->command_timeout))) |
0756eb3c PH |
4160 | { |
4161 | int code; | |
5169b5fa | 4162 | sx->send_quit = check_response(host, &errno, 0, sx->buffer, &code, &msg, |
447d236c | 4163 | &pass_message); |
5169b5fa | 4164 | if (!sx->send_quit) |
0756eb3c | 4165 | { |
c562fd30 JH |
4166 | DEBUG(D_transport) debug_printf("H=%s [%s] %s\n", |
4167 | host->name, host->address, msg); | |
0756eb3c PH |
4168 | } |
4169 | } | |
0756eb3c PH |
4170 | |
4171 | /* Either RSET was not needed, or it succeeded */ | |
4172 | ||
5169b5fa | 4173 | if (sx->ok) |
0756eb3c | 4174 | { |
01603eec | 4175 | #ifndef DISABLE_TLS |
875512a3 | 4176 | int pfd[2]; |
13c7874e | 4177 | #endif |
5169b5fa | 4178 | int socket_fd = sx->cctx.sock; |
875512a3 JH |
4179 | |
4180 | ||
5169b5fa | 4181 | if (sx->first_addr != NULL) /* More addresses still to be sent */ |
0756eb3c PH |
4182 | { /* in this run of the transport */ |
4183 | continue_sequence++; /* Causes * in logging */ | |
4184 | goto SEND_MESSAGE; | |
4185 | } | |
0756eb3c | 4186 | |
b7d3afcf JH |
4187 | /* Unless caller said it already has more messages listed for this host, |
4188 | pass the connection on to a new Exim process (below, the call to | |
4189 | transport_pass_socket). If the caller has more ready, just return with | |
4190 | the connection still open. */ | |
4191 | ||
01603eec | 4192 | #ifndef DISABLE_TLS |
74f1a423 | 4193 | if (tls_out.active.sock >= 0) |
8768d548 | 4194 | if ( f.continue_more |
ee8b8090 | 4195 | || verify_check_given_host(CUSS &ob->hosts_noproxy_tls, host) == OK) |
875512a3 | 4196 | { |
b7d3afcf JH |
4197 | /* Before passing the socket on, or returning to caller with it still |
4198 | open, we must shut down TLS. Not all MTAs allow for the continuation | |
4199 | of the SMTP session when TLS is shut down. We test for this by sending | |
4200 | a new EHLO. If we don't get a good response, we don't attempt to pass | |
4201 | the socket on. */ | |
875512a3 | 4202 | |
5169b5fa JH |
4203 | tls_close(sx->cctx.tls_ctx, TLS_SHUTDOWN_WAIT); |
4204 | sx->cctx.tls_ctx = NULL; | |
875512a3 | 4205 | smtp_peer_options = smtp_peer_options_wrap; |
5169b5fa JH |
4206 | sx->ok = !sx->smtps |
4207 | && smtp_write_command(sx, SCMD_FLUSH, "EHLO %s\r\n", sx->helo_data) | |
251b9eb4 | 4208 | >= 0 |
5169b5fa | 4209 | && smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), |
ee8b8090 | 4210 | '2', ob->command_timeout); |
b7d3afcf | 4211 | |
5169b5fa | 4212 | if (sx->ok && f.continue_more) |
b7d3afcf | 4213 | return yield; /* More addresses for another run */ |
875512a3 JH |
4214 | } |
4215 | else | |
4216 | { | |
4217 | /* Set up a pipe for proxying TLS for the new transport process */ | |
4218 | ||
14de8063 | 4219 | smtp_peer_options |= OPTION_TLS; |
5169b5fa | 4220 | if ((sx->ok = socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) == 0)) |
875512a3 JH |
4221 | socket_fd = pfd[1]; |
4222 | else | |
5169b5fa | 4223 | set_errno(sx->first_addr, errno, US"internal allocation problem", |
875512a3 JH |
4224 | DEFER, FALSE, host |
4225 | # ifdef EXPERIMENTAL_DSN_INFO | |
5169b5fa | 4226 | , sx->smtp_greeting, sx->helo_response |
875512a3 JH |
4227 | # endif |
4228 | ); | |
4229 | } | |
b7d3afcf | 4230 | else |
a7538db1 | 4231 | #endif |
8768d548 | 4232 | if (f.continue_more) |
b7d3afcf | 4233 | return yield; /* More addresses for another run */ |
0756eb3c | 4234 | |
4c04137d | 4235 | /* If the socket is successfully passed, we mustn't send QUIT (or |
0756eb3c PH |
4236 | indeed anything!) from here. */ |
4237 | ||
895fbaf2 JH |
4238 | /*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to |
4239 | propagate it from the initial | |
4240 | */ | |
5169b5fa | 4241 | if (sx->ok && transport_pass_socket(tblock->name, host->name, |
875512a3 JH |
4242 | host->address, new_message_id, socket_fd)) |
4243 | { | |
5169b5fa | 4244 | sx->send_quit = FALSE; |
875512a3 | 4245 | |
d097cc73 JH |
4246 | /* We have passed the client socket to a fresh transport process. |
4247 | If TLS is still active, we need to proxy it for the transport we | |
875512a3 JH |
4248 | just passed the baton to. Fork a child to to do it, and return to |
4249 | get logging done asap. Which way to place the work makes assumptions | |
4250 | about post-fork prioritisation which may not hold on all platforms. */ | |
01603eec | 4251 | #ifndef DISABLE_TLS |
74f1a423 | 4252 | if (tls_out.active.sock >= 0) |
875512a3 JH |
4253 | { |
4254 | int pid = fork(); | |
d097cc73 | 4255 | if (pid == 0) /* child; fork again to disconnect totally */ |
626810b9 | 4256 | { |
9f01e50d | 4257 | testharness_pause_ms(100); /* let parent debug out */ |
d097cc73 | 4258 | /* does not return */ |
5169b5fa | 4259 | smtp_proxy_tls(sx->cctx.tls_ctx, sx->buffer, sizeof(sx->buffer), pfd, |
ee8b8090 | 4260 | ob->command_timeout); |
626810b9 | 4261 | } |
d097cc73 | 4262 | |
875512a3 JH |
4263 | if (pid > 0) /* parent */ |
4264 | { | |
b7d3afcf | 4265 | DEBUG(D_transport) debug_printf("proxy-proc inter-pid %d\n", pid); |
e47252f5 | 4266 | close(pfd[0]); |
d097cc73 | 4267 | /* tidy the inter-proc to disconn the proxy proc */ |
60272099 | 4268 | waitpid(pid, NULL, 0); |
5169b5fa JH |
4269 | tls_close(sx->cctx.tls_ctx, TLS_NO_SHUTDOWN); |
4270 | sx->cctx.tls_ctx = NULL; | |
4271 | (void)close(sx->cctx.sock); | |
4272 | sx->cctx.sock = -1; | |
875512a3 JH |
4273 | continue_transport = NULL; |
4274 | continue_hostname = NULL; | |
4275 | return yield; | |
4276 | } | |
d097cc73 | 4277 | log_write(0, LOG_PANIC_DIE, "fork failed"); |
875512a3 | 4278 | } |
57cc2785 | 4279 | #endif |
875512a3 | 4280 | } |
0756eb3c PH |
4281 | } |
4282 | ||
4283 | /* If RSET failed and there are addresses left, they get deferred. */ | |
875512a3 | 4284 | else |
5169b5fa | 4285 | set_errno(sx->first_addr, errno, msg, DEFER, FALSE, host |
895fbaf2 | 4286 | #ifdef EXPERIMENTAL_DSN_INFO |
5169b5fa | 4287 | , sx->smtp_greeting, sx->helo_response |
895fbaf2 JH |
4288 | #endif |
4289 | ); | |
0756eb3c PH |
4290 | } |
4291 | } | |
4292 | ||
4293 | /* End off tidily with QUIT unless the connection has died or the socket has | |
4294 | been passed to another process. There has been discussion on the net about what | |
4295 | to do after sending QUIT. The wording of the RFC suggests that it is necessary | |
4296 | to wait for a response, but on the other hand, there isn't anything one can do | |
4297 | with an error response, other than log it. Exim used to do that. However, | |
4298 | further discussion suggested that it is positively advantageous not to wait for | |
4299 | the response, but to close the session immediately. This is supposed to move | |
4300 | the TCP/IP TIME_WAIT state from the server to the client, thereby removing some | |
4301 | load from the server. (Hosts that are both servers and clients may not see much | |
4302 | difference, of course.) Further discussion indicated that this was safe to do | |
4303 | on Unix systems which have decent implementations of TCP/IP that leave the | |
4304 | connection around for a while (TIME_WAIT) after the application has gone away. | |
4305 | This enables the response sent by the server to be properly ACKed rather than | |
4306 | timed out, as can happen on broken TCP/IP implementations on other OS. | |
4307 | ||
4308 | This change is being made on 31-Jul-98. After over a year of trouble-free | |
4309 | operation, the old commented-out code was removed on 17-Sep-99. */ | |
4310 | ||
4311 | SEND_QUIT: | |
2aaa3cdd | 4312 | #ifdef TCP_CORK |
5169b5fa | 4313 | (void) setsockopt(sx->cctx.sock, IPPROTO_TCP, TCP_CORK, US &on, sizeof(on)); |
2aaa3cdd | 4314 | #endif |
5169b5fa | 4315 | if (sx->send_quit) (void)smtp_write_command(sx, SCMD_FLUSH, "QUIT\r\n"); |
0756eb3c PH |
4316 | |
4317 | END_OFF: | |
4318 | ||
01603eec | 4319 | #ifndef DISABLE_TLS |
5169b5fa JH |
4320 | tls_close(sx->cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); |
4321 | sx->cctx.tls_ctx = NULL; | |
0756eb3c PH |
4322 | #endif |
4323 | ||
4324 | /* Close the socket, and return the appropriate value, first setting | |
0756eb3c PH |
4325 | works because the NULL setting is passed back to the calling process, and |
4326 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
4327 | ||
4328 | If all went well and continue_more is set, we shouldn't actually get here if | |
4329 | there are further addresses, as the return above will be taken. However, | |
4330 | writing RSET might have failed, or there may be other addresses whose hosts are | |
4331 | specified in the transports, and therefore not visible at top level, in which | |
4332 | case continue_more won't get set. */ | |
4333 | ||
e1d04f48 | 4334 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
5169b5fa | 4335 | if (sx->send_quit) |
60d10ce7 | 4336 | { |
5169b5fa | 4337 | shutdown(sx->cctx.sock, SHUT_WR); |
9f01e50d JH |
4338 | millisleep(20); |
4339 | testharness_pause_ms(200); | |
5169b5fa JH |
4340 | if (fcntl(sx->cctx.sock, F_SETFL, O_NONBLOCK) == 0) |
4341 | for (int i = 16; read(sx->cctx.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && i > 0;) | |
d7978c0f | 4342 | i--; /* drain socket */ |
60d10ce7 | 4343 | } |
5169b5fa | 4344 | (void)close(sx->cctx.sock); |
a7538db1 | 4345 | |
0cbf2b82 | 4346 | #ifndef DISABLE_EVENT |
774ef2d7 | 4347 | (void) event_raise(tblock->event_action, US"tcp:close", NULL); |
a7538db1 JH |
4348 | #endif |
4349 | ||
0756eb3c PH |
4350 | continue_transport = NULL; |
4351 | continue_hostname = NULL; | |
4352 | return yield; | |
4353 | } | |
4354 | ||
4355 | ||
4356 | ||
4357 | ||
4358 | /************************************************* | |
4359 | * Closedown entry point * | |
4360 | *************************************************/ | |
4361 | ||
4362 | /* This function is called when exim is passed an open smtp channel | |
4363 | from another incarnation, but the message which it has been asked | |
4364 | to deliver no longer exists. The channel is on stdin. | |
4365 | ||
4366 | We might do fancy things like looking for another message to send down | |
4367 | the channel, but if the one we sought has gone, it has probably been | |
4368 | delivered by some other process that itself will seek further messages, | |
4369 | so just close down our connection. | |
4370 | ||
4371 | Argument: pointer to the transport instance block | |
4372 | Returns: nothing | |
4373 | */ | |
4374 | ||
4375 | void | |
4376 | smtp_transport_closedown(transport_instance *tblock) | |
4377 | { | |
ee8b8090 | 4378 | smtp_transport_options_block * ob = SOB tblock->options_block; |
74f1a423 | 4379 | client_conn_ctx cctx; |
251b9eb4 | 4380 | smtp_context sx; |
0756eb3c PH |
4381 | uschar buffer[256]; |
4382 | uschar inbuffer[4096]; | |
4383 | uschar outbuffer[16]; | |
4384 | ||
74f1a423 JH |
4385 | /*XXX really we need an active-smtp-client ctx, rather than assuming stdout */ |
4386 | cctx.sock = fileno(stdin); | |
4387 | cctx.tls_ctx = cctx.sock == tls_out.active.sock ? tls_out.active.tls_ctx : NULL; | |
4388 | ||
251b9eb4 JH |
4389 | sx.inblock.cctx = &cctx; |
4390 | sx.inblock.buffer = inbuffer; | |
4391 | sx.inblock.buffersize = sizeof(inbuffer); | |
4392 | sx.inblock.ptr = inbuffer; | |
4393 | sx.inblock.ptrend = inbuffer; | |
4394 | ||
4395 | sx.outblock.cctx = &cctx; | |
4396 | sx.outblock.buffersize = sizeof(outbuffer); | |
4397 | sx.outblock.buffer = outbuffer; | |
4398 | sx.outblock.ptr = outbuffer; | |
4399 | sx.outblock.cmd_count = 0; | |
4400 | sx.outblock.authenticating = FALSE; | |
4401 | ||
4402 | (void)smtp_write_command(&sx, SCMD_FLUSH, "QUIT\r\n"); | |
4403 | (void)smtp_read_response(&sx, buffer, sizeof(buffer), '2', ob->command_timeout); | |
74f1a423 | 4404 | (void)close(cctx.sock); |
0756eb3c PH |
4405 | } |
4406 | ||
4407 | ||
4408 | ||
4409 | /************************************************* | |
4410 | * Prepare addresses for delivery * | |
4411 | *************************************************/ | |
4412 | ||
4413 | /* This function is called to flush out error settings from previous delivery | |
4414 | attempts to other hosts. It also records whether we got here via an MX record | |
4415 | or not in the more_errno field of the address. We are interested only in | |
4416 | addresses that are still marked DEFER - others may have got delivered to a | |
4417 | previously considered IP address. Set their status to PENDING_DEFER to indicate | |
4418 | which ones are relevant this time. | |
4419 | ||
4420 | Arguments: | |
4421 | addrlist the list of addresses | |
4422 | host the host we are delivering to | |
4423 | ||
4424 | Returns: the first address for this delivery | |
4425 | */ | |
4426 | ||
4427 | static address_item * | |
4428 | prepare_addresses(address_item *addrlist, host_item *host) | |
4429 | { | |
4430 | address_item *first_addr = NULL; | |
d7978c0f | 4431 | for (address_item * addr = addrlist; addr; addr = addr->next) |
168dec3b JH |
4432 | if (addr->transport_return == DEFER) |
4433 | { | |
7b4c8c1f | 4434 | if (!first_addr) first_addr = addr; |
168dec3b JH |
4435 | addr->transport_return = PENDING_DEFER; |
4436 | addr->basic_errno = 0; | |
4437 | addr->more_errno = (host->mx >= 0)? 'M' : 'A'; | |
4438 | addr->message = NULL; | |
01603eec | 4439 | #ifndef DISABLE_TLS |
168dec3b JH |
4440 | addr->cipher = NULL; |
4441 | addr->ourcert = NULL; | |
4442 | addr->peercert = NULL; | |
4443 | addr->peerdn = NULL; | |
4444 | addr->ocsp = OCSP_NOT_REQ; | |
da40b1ec | 4445 | addr->tlsver = NULL; |
895fbaf2 JH |
4446 | #endif |
4447 | #ifdef EXPERIMENTAL_DSN_INFO | |
4448 | addr->smtp_greeting = NULL; | |
4449 | addr->helo_response = NULL; | |
a7538db1 | 4450 | #endif |
168dec3b | 4451 | } |
0756eb3c PH |
4452 | return first_addr; |
4453 | } | |
4454 | ||
4455 | ||
4456 | ||
4457 | /************************************************* | |
4458 | * Main entry point * | |
4459 | *************************************************/ | |
4460 | ||
4461 | /* See local README for interface details. As this is a remote transport, it is | |
4462 | given a chain of addresses to be delivered in one connection, if possible. It | |
4463 | always returns TRUE, indicating that each address has its own independent | |
4464 | status set, except if there is a setting up problem, in which case it returns | |
4465 | FALSE. */ | |
4466 | ||
4467 | BOOL | |
4468 | smtp_transport_entry( | |
4469 | transport_instance *tblock, /* data for this instantiation */ | |
4470 | address_item *addrlist) /* addresses we are working on */ | |
4471 | { | |
a843a57e | 4472 | int defport; |
0756eb3c PH |
4473 | int hosts_defer = 0; |
4474 | int hosts_fail = 0; | |
4475 | int hosts_looked_up = 0; | |
4476 | int hosts_retry = 0; | |
4477 | int hosts_serial = 0; | |
4478 | int hosts_total = 0; | |
8e669ac1 | 4479 | int total_hosts_tried = 0; |
0756eb3c | 4480 | BOOL expired = TRUE; |
0756eb3c PH |
4481 | uschar *expanded_hosts = NULL; |
4482 | uschar *pistring; | |
4483 | uschar *tid = string_sprintf("%s transport", tblock->name); | |
ee8b8090 | 4484 | smtp_transport_options_block *ob = SOB tblock->options_block; |
0756eb3c | 4485 | host_item *hostlist = addrlist->host_list; |
56dbf856 | 4486 | host_item *host = NULL; |
0756eb3c PH |
4487 | |
4488 | DEBUG(D_transport) | |
4489 | { | |
4490 | debug_printf("%s transport entered\n", tblock->name); | |
d7978c0f | 4491 | for (address_item * addr = addrlist; addr; addr = addr->next) |
0756eb3c | 4492 | debug_printf(" %s\n", addr->address); |
7b4c8c1f JH |
4493 | if (hostlist) |
4494 | { | |
4495 | debug_printf("hostlist:\n"); | |
d7978c0f | 4496 | for (host_item * host = hostlist; host; host = host->next) |
f8ea1886 | 4497 | debug_printf(" '%s' IP %s port %d\n", host->name, host->address, host->port); |
7b4c8c1f | 4498 | } |
57cc2785 JH |
4499 | if (continue_hostname) |
4500 | debug_printf("already connected to %s [%s] (on fd %d)\n", | |
4501 | continue_hostname, continue_host_address, | |
74f1a423 | 4502 | cutthrough.cctx.sock >= 0 ? cutthrough.cctx.sock : 0); |
0756eb3c PH |
4503 | } |
4504 | ||
f6c332bd PH |
4505 | /* Set the flag requesting that these hosts be added to the waiting |
4506 | database if the delivery fails temporarily or if we are running with | |
4507 | queue_smtp or a 2-stage queue run. This gets unset for certain | |
4508 | kinds of error, typically those that are specific to the message. */ | |
4509 | ||
4510 | update_waiting = TRUE; | |
4511 | ||
0756eb3c PH |
4512 | /* If a host list is not defined for the addresses - they must all have the |
4513 | same one in order to be passed to a single transport - or if the transport has | |
4514 | a host list with hosts_override set, use the host list supplied with the | |
4515 | transport. It is an error for this not to exist. */ | |
4516 | ||
7b4c8c1f | 4517 | if (!hostlist || (ob->hosts_override && ob->hosts)) |
0756eb3c | 4518 | { |
7b4c8c1f | 4519 | if (!ob->hosts) |
0756eb3c PH |
4520 | { |
4521 | addrlist->message = string_sprintf("%s transport called with no hosts set", | |
4522 | tblock->name); | |
4523 | addrlist->transport_return = PANIC; | |
4524 | return FALSE; /* Only top address has status */ | |
4525 | } | |
4526 | ||
4527 | DEBUG(D_transport) debug_printf("using the transport's hosts: %s\n", | |
4528 | ob->hosts); | |
4529 | ||
4530 | /* If the transport's host list contains no '$' characters, and we are not | |
4531 | randomizing, it is fixed and therefore a chain of hosts can be built once | |
4532 | and for all, and remembered for subsequent use by other calls to this | |
4533 | transport. If, on the other hand, the host list does contain '$', or we are | |
4534 | randomizing its order, we have to rebuild it each time. In the fixed case, | |
4535 | as the hosts string will never be used again, it doesn't matter that we | |
4536 | replace all the : characters with zeros. */ | |
4537 | ||
7b4c8c1f | 4538 | if (!ob->hostlist) |
0756eb3c PH |
4539 | { |
4540 | uschar *s = ob->hosts; | |
4541 | ||
4542 | if (Ustrchr(s, '$') != NULL) | |
4543 | { | |
d427a7f9 | 4544 | if (!(expanded_hosts = expand_string(s))) |
0756eb3c PH |
4545 | { |
4546 | addrlist->message = string_sprintf("failed to expand list of hosts " | |
4547 | "\"%s\" in %s transport: %s", s, tblock->name, expand_string_message); | |
8768d548 | 4548 | addrlist->transport_return = f.search_find_defer ? DEFER : PANIC; |
0756eb3c PH |
4549 | return FALSE; /* Only top address has status */ |
4550 | } | |
4551 | DEBUG(D_transport) debug_printf("expanded list of hosts \"%s\" to " | |
4552 | "\"%s\"\n", s, expanded_hosts); | |
4553 | s = expanded_hosts; | |
4554 | } | |
4555 | else | |
4556 | if (ob->hosts_randomize) s = expanded_hosts = string_copy(s); | |
4557 | ||
f3ebb786 JH |
4558 | if (is_tainted(s)) |
4559 | { | |
4560 | log_write(0, LOG_MAIN|LOG_PANIC, | |
4561 | "attempt to use tainted host list '%s' from '%s' in transport %s", | |
4562 | s, ob->hosts, tblock->name); | |
4563 | /* Avoid leaking info to an attacker */ | |
4564 | addrlist->message = US"internal configuration error"; | |
4565 | addrlist->transport_return = PANIC; | |
4566 | return FALSE; | |
4567 | } | |
4568 | ||
0756eb3c PH |
4569 | host_build_hostlist(&hostlist, s, ob->hosts_randomize); |
4570 | ||
e276e04b | 4571 | /* Check that the expansion yielded something useful. */ |
7b4c8c1f | 4572 | if (!hostlist) |
e276e04b TF |
4573 | { |
4574 | addrlist->message = | |
4575 | string_sprintf("%s transport has empty hosts setting", tblock->name); | |
4576 | addrlist->transport_return = PANIC; | |
4577 | return FALSE; /* Only top address has status */ | |
4578 | } | |
4579 | ||
0756eb3c PH |
4580 | /* If there was no expansion of hosts, save the host list for |
4581 | next time. */ | |
4582 | ||
d427a7f9 | 4583 | if (!expanded_hosts) ob->hostlist = hostlist; |
0756eb3c PH |
4584 | } |
4585 | ||
4586 | /* This is not the first time this transport has been run in this delivery; | |
4587 | the host list was built previously. */ | |
4588 | ||
55414b25 JH |
4589 | else |
4590 | hostlist = ob->hostlist; | |
0756eb3c PH |
4591 | } |
4592 | ||
4593 | /* The host list was supplied with the address. If hosts_randomize is set, we | |
4594 | must sort it into a random order if it did not come from MX records and has not | |
4595 | already been randomized (but don't bother if continuing down an existing | |
4596 | connection). */ | |
4597 | ||
7b4c8c1f | 4598 | else if (ob->hosts_randomize && hostlist->mx == MX_NONE && !continue_hostname) |
0756eb3c PH |
4599 | { |
4600 | host_item *newlist = NULL; | |
7b4c8c1f | 4601 | while (hostlist) |
0756eb3c PH |
4602 | { |
4603 | host_item *h = hostlist; | |
4604 | hostlist = hostlist->next; | |
4605 | ||
4606 | h->sort_key = random_number(100); | |
4607 | ||
7b4c8c1f | 4608 | if (!newlist) |
0756eb3c PH |
4609 | { |
4610 | h->next = NULL; | |
4611 | newlist = h; | |
4612 | } | |
4613 | else if (h->sort_key < newlist->sort_key) | |
4614 | { | |
4615 | h->next = newlist; | |
4616 | newlist = h; | |
4617 | } | |
4618 | else | |
4619 | { | |
4620 | host_item *hh = newlist; | |
7b4c8c1f | 4621 | while (hh->next) |
0756eb3c PH |
4622 | { |
4623 | if (h->sort_key < hh->next->sort_key) break; | |
4624 | hh = hh->next; | |
4625 | } | |
4626 | h->next = hh->next; | |
4627 | hh->next = h; | |
4628 | } | |
4629 | } | |
4630 | ||
4631 | hostlist = addrlist->host_list = newlist; | |
4632 | } | |
4633 | ||
2d280592 | 4634 | /* Sort out the default port. */ |
0756eb3c | 4635 | |
a843a57e | 4636 | if (!smtp_get_port(ob->port, addrlist, &defport, tid)) return FALSE; |
0756eb3c | 4637 | |
0756eb3c PH |
4638 | /* For each host-plus-IP-address on the list: |
4639 | ||
4640 | . If this is a continued delivery and the host isn't the one with the | |
4641 | current connection, skip. | |
4642 | ||
4643 | . If the status is unusable (i.e. previously failed or retry checked), skip. | |
4644 | ||
4645 | . If no IP address set, get the address, either by turning the name into | |
4646 | an address, calling gethostbyname if gethostbyname is on, or by calling | |
4647 | the DNS. The DNS may yield multiple addresses, in which case insert the | |
4648 | extra ones into the list. | |
4649 | ||
4650 | . Get the retry data if not previously obtained for this address and set the | |
4651 | field which remembers the state of this address. Skip if the retry time is | |
4652 | not reached. If not, remember whether retry data was found. The retry string | |
4653 | contains both the name and the IP address. | |
4654 | ||
4655 | . Scan the list of addresses and mark those whose status is DEFER as | |
4656 | PENDING_DEFER. These are the only ones that will be processed in this cycle | |
4657 | of the hosts loop. | |
4658 | ||
4659 | . Make a delivery attempt - addresses marked PENDING_DEFER will be tried. | |
4660 | Some addresses may be successfully delivered, others may fail, and yet | |
4661 | others may get temporary errors and so get marked DEFER. | |
4662 | ||
4663 | . The return from the delivery attempt is OK if a connection was made and a | |
4664 | valid SMTP dialogue was completed. Otherwise it is DEFER. | |
4665 | ||
4666 | . If OK, add a "remove" retry item for this host/IPaddress, if any. | |
4667 | ||
4668 | . If fail to connect, or other defer state, add a retry item. | |
4669 | ||
4670 | . If there are any addresses whose status is still DEFER, carry on to the | |
4671 | next host/IPaddress, unless we have tried the number of hosts given | |
533244af | 4672 | by hosts_max_try or hosts_max_try_hardlimit; otherwise return. Note that |
8e669ac1 PH |
4673 | there is some fancy logic for hosts_max_try that means its limit can be |
4674 | overstepped in some circumstances. | |
0756eb3c PH |
4675 | |
4676 | If we get to the end of the list, all hosts have deferred at least one address, | |
4677 | or not reached their retry times. If delay_after_cutoff is unset, it requests a | |
4678 | delivery attempt to those hosts whose last try was before the arrival time of | |
4679 | the current message. To cope with this, we have to go round the loop a second | |
4680 | time. After that, set the status and error data for any addresses that haven't | |
4681 | had it set already. */ | |
4682 | ||
d7978c0f | 4683 | for (int cutoff_retry = 0; |
7b4c8c1f | 4684 | expired && cutoff_retry < (ob->delay_after_cutoff ? 1 : 2); |
0756eb3c PH |
4685 | cutoff_retry++) |
4686 | { | |
4687 | host_item *nexthost = NULL; | |
4688 | int unexpired_hosts_tried = 0; | |
2577f55f | 4689 | BOOL continue_host_tried = FALSE; |
0756eb3c | 4690 | |
2577f55f | 4691 | retry_non_continued: |
0756eb3c | 4692 | for (host = hostlist; |
7b4c8c1f JH |
4693 | host |
4694 | && unexpired_hosts_tried < ob->hosts_max_try | |
4695 | && total_hosts_tried < ob->hosts_max_try_hardlimit; | |
0756eb3c PH |
4696 | host = nexthost) |
4697 | { | |
4698 | int rc; | |
4699 | int host_af; | |
0756eb3c PH |
4700 | BOOL host_is_expired = FALSE; |
4701 | BOOL message_defer = FALSE; | |
0756eb3c PH |
4702 | BOOL some_deferred = FALSE; |
4703 | address_item *first_addr = NULL; | |
4704 | uschar *interface = NULL; | |
4705 | uschar *retry_host_key = NULL; | |
4706 | uschar *retry_message_key = NULL; | |
4707 | uschar *serialize_key = NULL; | |
4708 | ||
9c4e8f60 PH |
4709 | /* Default next host is next host. :-) But this can vary if the |
4710 | hosts_max_try limit is hit (see below). It may also be reset if a host | |
4711 | address is looked up here (in case the host was multihomed). */ | |
4712 | ||
4713 | nexthost = host->next; | |
4714 | ||
0756eb3c PH |
4715 | /* If the address hasn't yet been obtained from the host name, look it up |
4716 | now, unless the host is already marked as unusable. If it is marked as | |
4717 | unusable, it means that the router was unable to find its IP address (in | |
4718 | the DNS or wherever) OR we are in the 2nd time round the cutoff loop, and | |
4719 | the lookup failed last time. We don't get this far if *all* MX records | |
4720 | point to non-existent hosts; that is treated as a hard error. | |
4721 | ||
4722 | We can just skip this host entirely. When the hosts came from the router, | |
4723 | the address will timeout based on the other host(s); when the address is | |
4724 | looked up below, there is an explicit retry record added. | |
4725 | ||
4726 | Note that we mustn't skip unusable hosts if the address is not unset; they | |
4727 | may be needed as expired hosts on the 2nd time round the cutoff loop. */ | |
4728 | ||
7b4c8c1f | 4729 | if (!host->address) |
0756eb3c | 4730 | { |
322050c2 | 4731 | int new_port, flags; |
0756eb3c PH |
4732 | |
4733 | if (host->status >= hstatus_unusable) | |
4734 | { | |
4735 | DEBUG(D_transport) debug_printf("%s has no address and is unusable - skipping\n", | |
4736 | host->name); | |
4737 | continue; | |
4738 | } | |
4739 | ||
4740 | DEBUG(D_transport) debug_printf("getting address for %s\n", host->name); | |
4741 | ||
7cd1141b PH |
4742 | /* The host name is permitted to have an attached port. Find it, and |
4743 | strip it from the name. Just remember it for now. */ | |
4744 | ||
4745 | new_port = host_item_get_port(host); | |
4746 | ||
4747 | /* Count hosts looked up */ | |
4748 | ||
0756eb3c PH |
4749 | hosts_looked_up++; |
4750 | ||
4751 | /* Find by name if so configured, or if it's an IP address. We don't | |
4752 | just copy the IP address, because we need the test-for-local to happen. */ | |
4753 | ||
66387a73 | 4754 | flags = HOST_FIND_BY_A | HOST_FIND_BY_AAAA; |
322050c2 PH |
4755 | if (ob->dns_qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE; |
4756 | if (ob->dns_search_parents) flags |= HOST_FIND_SEARCH_PARENTS; | |
4757 | ||
7e66e54d | 4758 | if (ob->gethostbyname || string_is_ip_address(host->name, NULL) != 0) |
55414b25 | 4759 | rc = host_find_byname(host, NULL, flags, NULL, TRUE); |
0756eb3c | 4760 | else |
0756eb3c | 4761 | rc = host_find_bydns(host, NULL, flags, NULL, NULL, NULL, |
7cd171b7 | 4762 | &ob->dnssec, /* domains for request/require */ |
55414b25 | 4763 | NULL, NULL); |
0756eb3c | 4764 | |
7cd1141b PH |
4765 | /* Update the host (and any additional blocks, resulting from |
4766 | multihoming) with a host-specific port, if any. */ | |
4767 | ||
d7978c0f | 4768 | for (host_item * hh = host; hh != nexthost; hh = hh->next) hh->port = new_port; |
7cd1141b | 4769 | |
0756eb3c PH |
4770 | /* Failure to find the host at this time (usually DNS temporary failure) |
4771 | is really a kind of routing failure rather than a transport failure. | |
4772 | Therefore we add a retry item of the routing kind, not to stop us trying | |
4773 | to look this name up here again, but to ensure the address gets timed | |
4774 | out if the failures go on long enough. A complete failure at this point | |
4775 | commonly points to a configuration error, but the best action is still | |
4776 | to carry on for the next host. */ | |
4777 | ||
2546388c | 4778 | if (rc == HOST_FIND_AGAIN || rc == HOST_FIND_SECURITY || rc == HOST_FIND_FAILED) |
0756eb3c PH |
4779 | { |
4780 | retry_add_item(addrlist, string_sprintf("R:%s", host->name), 0); | |
4781 | expired = FALSE; | |
4782 | if (rc == HOST_FIND_AGAIN) hosts_defer++; else hosts_fail++; | |
4783 | DEBUG(D_transport) debug_printf("rc = %s for %s\n", (rc == HOST_FIND_AGAIN)? | |
4784 | "HOST_FIND_AGAIN" : "HOST_FIND_FAILED", host->name); | |
4785 | host->status = hstatus_unusable; | |
4786 | ||
d7978c0f | 4787 | for (address_item * addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4788 | { |
4789 | if (addr->transport_return != DEFER) continue; | |
4790 | addr->basic_errno = ERRNO_UNKNOWNHOST; | |
2546388c JH |
4791 | addr->message = string_sprintf( |
4792 | rc == HOST_FIND_SECURITY | |
4793 | ? "lookup of IP address for %s was insecure" | |
4794 | : "failed to lookup IP address for %s", | |
4795 | host->name); | |
0756eb3c PH |
4796 | } |
4797 | continue; | |
4798 | } | |
4799 | ||
4800 | /* If the host is actually the local host, we may have a problem, or | |
4801 | there may be some cunning configuration going on. In the problem case, | |
4802 | log things and give up. The default transport status is already DEFER. */ | |
4803 | ||
4804 | if (rc == HOST_FOUND_LOCAL && !ob->allow_localhost) | |
4805 | { | |
d7978c0f | 4806 | for (address_item * addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4807 | { |
4808 | addr->basic_errno = 0; | |
4809 | addr->message = string_sprintf("%s transport found host %s to be " | |
4810 | "local", tblock->name, host->name); | |
4811 | } | |
4812 | goto END_TRANSPORT; | |
4813 | } | |
4814 | } /* End of block for IP address lookup */ | |
4815 | ||
4816 | /* If this is a continued delivery, we are interested only in the host | |
4817 | which matches the name of the existing open channel. The check is put | |
4818 | here after the local host lookup, in case the name gets expanded as a | |
4819 | result of the lookup. Set expired FALSE, to save the outer loop executing | |
4820 | twice. */ | |
4821 | ||
2577f55f JH |
4822 | if (continue_hostname) |
4823 | if ( Ustrcmp(continue_hostname, host->name) != 0 | |
4824 | || Ustrcmp(continue_host_address, host->address) != 0 | |
4825 | ) | |
4826 | { | |
4827 | expired = FALSE; | |
4828 | continue; /* With next host */ | |
4829 | } | |
4830 | else | |
4831 | continue_host_tried = TRUE; | |
0756eb3c | 4832 | |
9c4e8f60 PH |
4833 | /* Reset the default next host in case a multihomed host whose addresses |
4834 | are not looked up till just above added to the host list. */ | |
83364d30 PH |
4835 | |
4836 | nexthost = host->next; | |
4837 | ||
0756eb3c PH |
4838 | /* If queue_smtp is set (-odqs or the first part of a 2-stage run), or the |
4839 | domain is in queue_smtp_domains, we don't actually want to attempt any | |
4840 | deliveries. When doing a queue run, queue_smtp_domains is always unset. If | |
4841 | there is a lookup defer in queue_smtp_domains, proceed as if the domain | |
4842 | were not in it. We don't want to hold up all SMTP deliveries! Except when | |
4843 | doing a two-stage queue run, don't do this if forcing. */ | |
4844 | ||
8768d548 | 4845 | if ((!f.deliver_force || f.queue_2stage) && (f.queue_smtp || |
55414b25 JH |
4846 | match_isinlist(addrlist->domain, |
4847 | (const uschar **)&queue_smtp_domains, 0, | |
cf39cf57 | 4848 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)) |
0756eb3c PH |
4849 | { |
4850 | expired = FALSE; | |
d7978c0f | 4851 | for (address_item * addr = addrlist; addr; addr = addr->next) |
7b4c8c1f JH |
4852 | if (addr->transport_return == DEFER) |
4853 | addr->message = US"domain matches queue_smtp_domains, or -odqs set"; | |
0756eb3c PH |
4854 | continue; /* With next host */ |
4855 | } | |
4856 | ||
4857 | /* Count hosts being considered - purely for an intelligent comment | |
4858 | if none are usable. */ | |
4859 | ||
4860 | hosts_total++; | |
4861 | ||
4862 | /* Set $host and $host address now in case they are needed for the | |
4863 | interface expansion or the serialize_hosts check; they remain set if an | |
4864 | actual delivery happens. */ | |
4865 | ||
4866 | deliver_host = host->name; | |
4867 | deliver_host_address = host->address; | |
783b385f JH |
4868 | lookup_dnssec_authenticated = host->dnssec == DS_YES ? US"yes" |
4869 | : host->dnssec == DS_NO ? US"no" | |
4870 | : US""; | |
0756eb3c | 4871 | |
7cd1141b PH |
4872 | /* Set up a string for adding to the retry key if the port number is not |
4873 | the standard SMTP port. A host may have its own port setting that overrides | |
4874 | the default. */ | |
4875 | ||
7b4c8c1f | 4876 | pistring = string_sprintf(":%d", host->port == PORT_NONE |
a843a57e | 4877 | ? defport : host->port); |
7cd1141b PH |
4878 | if (Ustrcmp(pistring, ":25") == 0) pistring = US""; |
4879 | ||
0756eb3c | 4880 | /* Select IPv4 or IPv6, and choose an outgoing interface. If the interface |
6f6dedcc JH |
4881 | string is set, even if constant (as different transports can have different |
4882 | constant settings), we must add it to the key that is used for retries, | |
4883 | because connections to the same host from a different interface should be | |
4884 | treated separately. */ | |
0756eb3c | 4885 | |
7b4c8c1f | 4886 | host_af = Ustrchr(host->address, ':') == NULL ? AF_INET : AF_INET6; |
6f6dedcc | 4887 | { |
aeb65e91 JH |
4888 | uschar * s = ob->interface; |
4889 | if (s && *s) | |
4890 | { | |
4891 | if (!smtp_get_interface(s, host_af, addrlist, &interface, tid)) | |
4892 | return FALSE; | |
4893 | pistring = string_sprintf("%s/%s", pistring, interface); | |
4894 | } | |
6f6dedcc | 4895 | } |
0756eb3c PH |
4896 | |
4897 | /* The first time round the outer loop, check the status of the host by | |
4898 | inspecting the retry data. The second time round, we are interested only | |
4899 | in expired hosts that haven't been tried since this message arrived. */ | |
4900 | ||
4901 | if (cutoff_retry == 0) | |
4902 | { | |
9c695f6d | 4903 | BOOL incl_ip; |
0756eb3c | 4904 | /* Ensure the status of the address is set by checking retry data if |
9c695f6d | 4905 | necessary. There may be host-specific retry data (applicable to all |
0756eb3c PH |
4906 | messages) and also data for retries of a specific message at this host. |
4907 | If either of these retry records are actually read, the keys used are | |
4908 | returned to save recomputing them later. */ | |
4909 | ||
9c695f6d JH |
4910 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, |
4911 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4912 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4913 | continue; /* with next host */ | |
4914 | ||
0756eb3c | 4915 | host_is_expired = retry_check_address(addrlist->domain, host, pistring, |
9c695f6d | 4916 | incl_ip, &retry_host_key, &retry_message_key); |
0756eb3c | 4917 | |
875512a3 | 4918 | DEBUG(D_transport) debug_printf("%s [%s]%s retry-status = %s\n", host->name, |
8b455685 JH |
4919 | host->address ? host->address : US"", pistring, |
4920 | host->status == hstatus_usable ? "usable" | |
4921 | : host->status == hstatus_unusable ? "unusable" | |
4922 | : host->status == hstatus_unusable_expired ? "unusable (expired)" : "?"); | |
0756eb3c PH |
4923 | |
4924 | /* Skip this address if not usable at this time, noting if it wasn't | |
4925 | actually expired, both locally and in the address. */ | |
4926 | ||
4927 | switch (host->status) | |
4928 | { | |
4929 | case hstatus_unusable: | |
7b4c8c1f JH |
4930 | expired = FALSE; |
4931 | setflag(addrlist, af_retry_skipped); | |
4932 | /* Fall through */ | |
0756eb3c PH |
4933 | |
4934 | case hstatus_unusable_expired: | |
7b4c8c1f JH |
4935 | switch (host->why) |
4936 | { | |
4937 | case hwhy_retry: hosts_retry++; break; | |
4938 | case hwhy_failed: hosts_fail++; break; | |
2546388c | 4939 | case hwhy_insecure: |
7b4c8c1f JH |
4940 | case hwhy_deferred: hosts_defer++; break; |
4941 | } | |
4942 | ||
4943 | /* If there was a retry message key, implying that previously there | |
4944 | was a message-specific defer, we don't want to update the list of | |
4945 | messages waiting for these hosts. */ | |
4946 | ||
4947 | if (retry_message_key) update_waiting = FALSE; | |
4948 | continue; /* With the next host or IP address */ | |
0756eb3c PH |
4949 | } |
4950 | } | |
4951 | ||
4952 | /* Second time round the loop: if the address is set but expired, and | |
4953 | the message is newer than the last try, let it through. */ | |
4954 | ||
4955 | else | |
4956 | { | |
7b4c8c1f JH |
4957 | if ( !host->address |
4958 | || host->status != hstatus_unusable_expired | |
32dfdf8b | 4959 | || host->last_try > received_time.tv_sec) |
0756eb3c | 4960 | continue; |
7b4c8c1f | 4961 | DEBUG(D_transport) debug_printf("trying expired host %s [%s]%s\n", |
0756eb3c PH |
4962 | host->name, host->address, pistring); |
4963 | host_is_expired = TRUE; | |
4964 | } | |
4965 | ||
4966 | /* Setting "expired=FALSE" doesn't actually mean not all hosts are expired; | |
4967 | it remains TRUE only if all hosts are expired and none are actually tried. | |
4968 | */ | |
4969 | ||
4970 | expired = FALSE; | |
4971 | ||
4972 | /* If this host is listed as one to which access must be serialized, | |
4973 | see if another Exim process has a connection to it, and if so, skip | |
4974 | this host. If not, update the database to record our connection to it | |
4975 | and remember this for later deletion. Do not do any of this if we are | |
4976 | sending the message down a pre-existing connection. */ | |
4977 | ||
7b4c8c1f | 4978 | if ( !continue_hostname |
3fb3231c | 4979 | && verify_check_given_host(CUSS &ob->serialize_hosts, host) == OK) |
0756eb3c PH |
4980 | { |
4981 | serialize_key = string_sprintf("host-serialize-%s", host->name); | |
e8ae7214 | 4982 | if (!enq_start(serialize_key, 1)) |
0756eb3c PH |
4983 | { |
4984 | DEBUG(D_transport) | |
4985 | debug_printf("skipping host %s because another Exim process " | |
4986 | "is connected to it\n", host->name); | |
4987 | hosts_serial++; | |
4988 | continue; | |
4989 | } | |
0756eb3c PH |
4990 | } |
4991 | ||
4992 | /* OK, we have an IP address that is not waiting for its retry time to | |
4993 | arrive (it might be expired) OR (second time round the loop) we have an | |
4994 | expired host that hasn't been tried since the message arrived. Have a go | |
4995 | at delivering the message to it. First prepare the addresses by flushing | |
4996 | out the result of previous attempts, and finding the first address that | |
4997 | is still to be delivered. */ | |
4998 | ||
4999 | first_addr = prepare_addresses(addrlist, host); | |
5000 | ||
5001 | DEBUG(D_transport) debug_printf("delivering %s to %s [%s] (%s%s)\n", | |
5002 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 5003 | addrlist->next ? ", ..." : ""); |
0756eb3c | 5004 | |
67ea939c JH |
5005 | set_process_info("delivering %s to %s [%s]%s (%s%s)", |
5006 | message_id, host->name, host->address, pistring, addrlist->address, | |
7b4c8c1f | 5007 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
5008 | |
5009 | /* This is not for real; don't do the delivery. If there are | |
5010 | any remaining hosts, list them. */ | |
5011 | ||
8768d548 | 5012 | if (f.dont_deliver) |
0756eb3c | 5013 | { |
895fbaf2 | 5014 | set_errno_nohost(addrlist, 0, NULL, OK, FALSE); |
d7978c0f | 5015 | for (address_item * addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
5016 | { |
5017 | addr->host_used = host; | |
5018 | addr->special_action = '*'; | |
5019 | addr->message = US"delivery bypassed by -N option"; | |
5020 | } | |
5021 | DEBUG(D_transport) | |
5022 | { | |
5023 | debug_printf("*** delivery by %s transport bypassed by -N option\n" | |
5024 | "*** host and remaining hosts:\n", tblock->name); | |
d7978c0f | 5025 | for (host_item * host2 = host; host2; host2 = host2->next) |
0756eb3c | 5026 | debug_printf(" %s [%s]\n", host2->name, |
7b4c8c1f | 5027 | host2->address ? host2->address : US"unset"); |
0756eb3c PH |
5028 | } |
5029 | rc = OK; | |
5030 | } | |
5031 | ||
5032 | /* This is for real. If the host is expired, we don't count it for | |
5033 | hosts_max_retry. This ensures that all hosts must expire before an address | |
8e669ac1 | 5034 | is timed out, unless hosts_max_try_hardlimit (which protects against |
533244af | 5035 | lunatic DNS configurations) is reached. |
8e669ac1 | 5036 | |
533244af PH |
5037 | If the host is not expired and we are about to hit the hosts_max_retry |
5038 | limit, check to see if there is a subsequent hosts with a different MX | |
5039 | value. If so, make that the next host, and don't count this one. This is a | |
5040 | heuristic to make sure that different MXs do get tried. With a normal kind | |
5041 | of retry rule, they would get tried anyway when the earlier hosts were | |
5042 | delayed, but if the domain has a "retry every time" type of rule - as is | |
5043 | often used for the the very large ISPs, that won't happen. */ | |
0756eb3c PH |
5044 | |
5045 | else | |
5046 | { | |
d427a7f9 JH |
5047 | host_item * thost; |
5048 | /* Make a copy of the host if it is local to this invocation | |
5049 | of the transport. */ | |
5050 | ||
5051 | if (expanded_hosts) | |
5052 | { | |
f3ebb786 | 5053 | thost = store_get(sizeof(host_item), FALSE); |
d427a7f9 JH |
5054 | *thost = *host; |
5055 | thost->name = string_copy(host->name); | |
5056 | thost->address = string_copy(host->address); | |
5057 | } | |
5058 | else | |
5059 | thost = host; | |
5060 | ||
0756eb3c PH |
5061 | if (!host_is_expired && ++unexpired_hosts_tried >= ob->hosts_max_try) |
5062 | { | |
0756eb3c PH |
5063 | DEBUG(D_transport) |
5064 | debug_printf("hosts_max_try limit reached with this host\n"); | |
d7978c0f | 5065 | for (host_item * h = host; h; h = h->next) if (h->mx != host->mx) |
1a47b633 JH |
5066 | { |
5067 | nexthost = h; | |
5068 | unexpired_hosts_tried--; | |
5069 | DEBUG(D_transport) debug_printf("however, a higher MX host exists " | |
5070 | "and will be tried\n"); | |
5071 | break; | |
5072 | } | |
0756eb3c PH |
5073 | } |
5074 | ||
5075 | /* Attempt the delivery. */ | |
5076 | ||
533244af | 5077 | total_hosts_tried++; |
a843a57e | 5078 | rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock, |
d427a7f9 | 5079 | &message_defer, FALSE); |
0756eb3c PH |
5080 | |
5081 | /* Yield is one of: | |
5082 | OK => connection made, each address contains its result; | |
5083 | message_defer is set for message-specific defers (when all | |
5084 | recipients are marked defer) | |
5085 | DEFER => there was a non-message-specific delivery problem; | |
5086 | ERROR => there was a problem setting up the arguments for a filter, | |
5087 | or there was a problem with expanding added headers | |
5088 | */ | |
5089 | ||
5090 | /* If the result is not OK, there was a non-message-specific problem. | |
5091 | If the result is DEFER, we need to write to the logs saying what happened | |
5092 | for this particular host, except in the case of authentication and TLS | |
5093 | failures, where the log has already been written. If all hosts defer a | |
5094 | general message is written at the end. */ | |
5095 | ||
7b4c8c1f JH |
5096 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL |
5097 | && first_addr->basic_errno != ERRNO_TLSFAILURE) | |
ec62d0a9 | 5098 | write_logs(host, first_addr->message, first_addr->basic_errno); |
0756eb3c | 5099 | |
0cbf2b82 | 5100 | #ifndef DISABLE_EVENT |
d68218c7 | 5101 | if (rc == DEFER) |
774ef2d7 | 5102 | deferred_event_raise(first_addr, host); |
a7538db1 | 5103 | #endif |
d68218c7 | 5104 | |
0756eb3c PH |
5105 | /* If STARTTLS was accepted, but there was a failure in setting up the |
5106 | TLS session (usually a certificate screwup), and the host is not in | |
5107 | hosts_require_tls, and tls_tempfail_tryclear is true, try again, with | |
5108 | TLS forcibly turned off. We have to start from scratch with a new SMTP | |
5109 | connection. That's why the retry is done from here, not from within | |
5110 | smtp_deliver(). [Rejections of STARTTLS itself don't screw up the | |
5111 | session, so the in-clear transmission after those errors, if permitted, | |
5112 | happens inside smtp_deliver().] */ | |
5113 | ||
01603eec | 5114 | #ifndef DISABLE_TLS |
7a31d643 JH |
5115 | if ( rc == DEFER |
5116 | && first_addr->basic_errno == ERRNO_TLSFAILURE | |
5117 | && ob->tls_tempfail_tryclear | |
3fb3231c | 5118 | && verify_check_given_host(CUSS &ob->hosts_require_tls, host) != OK |
7a31d643 | 5119 | ) |
0756eb3c | 5120 | { |
cf0c6164 JH |
5121 | log_write(0, LOG_MAIN, |
5122 | "%s: delivering unencrypted to H=%s [%s] (not in hosts_require_tls)", | |
5123 | first_addr->message, host->name, host->address); | |
0756eb3c | 5124 | first_addr = prepare_addresses(addrlist, host); |
a843a57e | 5125 | rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock, |
d427a7f9 | 5126 | &message_defer, TRUE); |
0756eb3c | 5127 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL) |
ec62d0a9 | 5128 | write_logs(host, first_addr->message, first_addr->basic_errno); |
0cbf2b82 | 5129 | # ifndef DISABLE_EVENT |
d68218c7 | 5130 | if (rc == DEFER) |
774ef2d7 | 5131 | deferred_event_raise(first_addr, host); |
a7538db1 | 5132 | # endif |
0756eb3c | 5133 | } |
01603eec | 5134 | #endif /*DISABLE_TLS*/ |
0756eb3c PH |
5135 | } |
5136 | ||
5137 | /* Delivery attempt finished */ | |
5138 | ||
67ea939c JH |
5139 | set_process_info("delivering %s: just tried %s [%s]%s for %s%s: result %s", |
5140 | message_id, host->name, host->address, pistring, addrlist->address, | |
aeb65e91 | 5141 | addrlist->next ? " (& others)" : "", rc_to_string(rc)); |
0756eb3c PH |
5142 | |
5143 | /* Release serialization if set up */ | |
5144 | ||
7b4c8c1f | 5145 | if (serialize_key) enq_end(serialize_key); |
0756eb3c PH |
5146 | |
5147 | /* If the result is DEFER, or if a host retry record is known to exist, we | |
5148 | need to add an item to the retry chain for updating the retry database | |
5149 | at the end of delivery. We only need to add the item to the top address, | |
5150 | of course. Also, if DEFER, we mark the IP address unusable so as to skip it | |
5151 | for any other delivery attempts using the same address. (It is copied into | |
5152 | the unusable tree at the outer level, so even if different address blocks | |
5153 | contain the same address, it still won't get tried again.) */ | |
5154 | ||
7b4c8c1f | 5155 | if (rc == DEFER || retry_host_key) |
0756eb3c | 5156 | { |
7b4c8c1f JH |
5157 | int delete_flag = rc != DEFER ? rf_delete : 0; |
5158 | if (!retry_host_key) | |
0756eb3c | 5159 | { |
9c695f6d JH |
5160 | BOOL incl_ip; |
5161 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
5162 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
5163 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
5164 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
5165 | ||
7b4c8c1f JH |
5166 | retry_host_key = incl_ip |
5167 | ? string_sprintf("T:%S:%s%s", host->name, host->address, pistring) | |
5168 | : string_sprintf("T:%S%s", host->name, pistring); | |
0756eb3c PH |
5169 | } |
5170 | ||
5171 | /* If a delivery of another message over an existing SMTP connection | |
5172 | yields DEFER, we do NOT set up retry data for the host. This covers the | |
5173 | case when there are delays in routing the addresses in the second message | |
5174 | that are so long that the server times out. This is alleviated by not | |
5175 | routing addresses that previously had routing defers when handling an | |
5176 | existing connection, but even so, this case may occur (e.g. if a | |
5177 | previously happily routed address starts giving routing defers). If the | |
5178 | host is genuinely down, another non-continued message delivery will | |
5179 | notice it soon enough. */ | |
5180 | ||
7b4c8c1f | 5181 | if (delete_flag != 0 || !continue_hostname) |
0756eb3c PH |
5182 | retry_add_item(first_addr, retry_host_key, rf_host | delete_flag); |
5183 | ||
5184 | /* We may have tried an expired host, if its retry time has come; ensure | |
5185 | the status reflects the expiry for the benefit of any other addresses. */ | |
5186 | ||
5187 | if (rc == DEFER) | |
5188 | { | |
7b4c8c1f JH |
5189 | host->status = host_is_expired |
5190 | ? hstatus_unusable_expired : hstatus_unusable; | |
0756eb3c PH |
5191 | host->why = hwhy_deferred; |
5192 | } | |
5193 | } | |
5194 | ||
5195 | /* If message_defer is set (host was OK, but every recipient got deferred | |
5196 | because of some message-specific problem), or if that had happened | |
5197 | previously so that a message retry key exists, add an appropriate item | |
5198 | to the retry chain. Note that if there was a message defer but now there is | |
5199 | a host defer, the message defer record gets deleted. That seems perfectly | |
5200 | reasonable. Also, stop the message from being remembered as waiting | |
f6c332bd | 5201 | for specific hosts. */ |
0756eb3c | 5202 | |
7b4c8c1f | 5203 | if (message_defer || retry_message_key) |
0756eb3c | 5204 | { |
7b4c8c1f JH |
5205 | int delete_flag = message_defer ? 0 : rf_delete; |
5206 | if (!retry_message_key) | |
0756eb3c | 5207 | { |
9c695f6d JH |
5208 | BOOL incl_ip; |
5209 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
5210 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
5211 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
5212 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
5213 | ||
7b4c8c1f JH |
5214 | retry_message_key = incl_ip |
5215 | ? string_sprintf("T:%S:%s%s:%s", host->name, host->address, pistring, | |
5216 | message_id) | |
5217 | : string_sprintf("T:%S%s:%s", host->name, pistring, message_id); | |
0756eb3c PH |
5218 | } |
5219 | retry_add_item(addrlist, retry_message_key, | |
5220 | rf_message | rf_host | delete_flag); | |
f6c332bd | 5221 | update_waiting = FALSE; |
0756eb3c PH |
5222 | } |
5223 | ||
5224 | /* Any return other than DEFER (that is, OK or ERROR) means that the | |
5225 | addresses have got their final statuses filled in for this host. In the OK | |
5226 | case, see if any of them are deferred. */ | |
5227 | ||
5228 | if (rc == OK) | |
d7978c0f | 5229 | for (address_item * addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
5230 | if (addr->transport_return == DEFER) |
5231 | { | |
5232 | some_deferred = TRUE; | |
5233 | break; | |
5234 | } | |
0756eb3c PH |
5235 | |
5236 | /* If no addresses deferred or the result was ERROR, return. We do this for | |
5237 | ERROR because a failing filter set-up or add_headers expansion is likely to | |
5238 | fail for any host we try. */ | |
5239 | ||
5240 | if (rc == ERROR || (rc == OK && !some_deferred)) | |
5241 | { | |
5242 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
5243 | return TRUE; /* Each address has its status */ | |
5244 | } | |
5245 | ||
5246 | /* If the result was DEFER or some individual addresses deferred, let | |
5247 | the loop run to try other hosts with the deferred addresses, except for the | |
5248 | case when we were trying to deliver down an existing channel and failed. | |
5249 | Don't try any other hosts in this case. */ | |
5250 | ||
7b4c8c1f | 5251 | if (continue_hostname) break; |
0756eb3c PH |
5252 | |
5253 | /* If the whole delivery, or some individual addresses, were deferred and | |
5254 | there are more hosts that could be tried, do not count this host towards | |
5255 | the hosts_max_try limit if the age of the message is greater than the | |
5256 | maximum retry time for this host. This means we may try try all hosts, | |
5257 | ignoring the limit, when messages have been around for some time. This is | |
5258 | important because if we don't try all hosts, the address will never time | |
533244af | 5259 | out. NOTE: this does not apply to hosts_max_try_hardlimit. */ |
0756eb3c | 5260 | |
7b4c8c1f | 5261 | if ((rc == DEFER || some_deferred) && nexthost) |
0756eb3c PH |
5262 | { |
5263 | BOOL timedout; | |
5264 | retry_config *retry = retry_find_config(host->name, NULL, 0, 0); | |
5265 | ||
7b4c8c1f | 5266 | if (retry && retry->rules) |
0756eb3c PH |
5267 | { |
5268 | retry_rule *last_rule; | |
5269 | for (last_rule = retry->rules; | |
7b4c8c1f | 5270 | last_rule->next; |
0756eb3c | 5271 | last_rule = last_rule->next); |
32dfdf8b | 5272 | timedout = time(NULL) - received_time.tv_sec > last_rule->timeout; |
0756eb3c PH |
5273 | } |
5274 | else timedout = TRUE; /* No rule => timed out */ | |
5275 | ||
5276 | if (timedout) | |
5277 | { | |
5278 | unexpired_hosts_tried--; | |
5279 | DEBUG(D_transport) debug_printf("temporary delivery error(s) override " | |
5280 | "hosts_max_try (message older than host's retry time)\n"); | |
5281 | } | |
5282 | } | |
06f37c80 JH |
5283 | |
5284 | DEBUG(D_transport) | |
5285 | { | |
5286 | if (unexpired_hosts_tried >= ob->hosts_max_try) | |
5287 | debug_printf("reached transport hosts_max_try limit %d\n", | |
5288 | ob->hosts_max_try); | |
5289 | if (total_hosts_tried >= ob->hosts_max_try_hardlimit) | |
5290 | debug_printf("reached transport hosts_max_try_hardlimit limit %d\n", | |
5291 | ob->hosts_max_try_hardlimit); | |
5292 | } | |
5293 | ||
9f01e50d | 5294 | testharness_pause_ms(500); /* let server debug out */ |
0756eb3c PH |
5295 | } /* End of loop for trying multiple hosts. */ |
5296 | ||
2577f55f JH |
5297 | /* If we failed to find a matching host in the list, for an already-open |
5298 | connection, just close it and start over with the list. This can happen | |
5299 | for routing that changes from run to run, or big multi-IP sites with | |
5300 | round-robin DNS. */ | |
5301 | ||
5302 | if (continue_hostname && !continue_host_tried) | |
5303 | { | |
74f1a423 | 5304 | int fd = cutthrough.cctx.sock >= 0 ? cutthrough.cctx.sock : 0; |
2577f55f JH |
5305 | |
5306 | DEBUG(D_transport) debug_printf("no hosts match already-open connection\n"); | |
01603eec | 5307 | #ifndef DISABLE_TLS |
74f1a423 JH |
5308 | /* A TLS conn could be open for a cutthrough, but not for a plain continued- |
5309 | transport */ | |
5310 | /*XXX doublecheck that! */ | |
5311 | ||
5312 | if (cutthrough.cctx.sock >= 0 && cutthrough.is_tls) | |
2577f55f | 5313 | { |
74f1a423 JH |
5314 | (void) tls_write(cutthrough.cctx.tls_ctx, US"QUIT\r\n", 6, FALSE); |
5315 | tls_close(cutthrough.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); | |
5316 | cutthrough.cctx.tls_ctx = NULL; | |
5317 | cutthrough.is_tls = FALSE; | |
2577f55f JH |
5318 | } |
5319 | else | |
5320 | #else | |
5321 | (void) write(fd, US"QUIT\r\n", 6); | |
5322 | #endif | |
5323 | (void) close(fd); | |
74f1a423 | 5324 | cutthrough.cctx.sock = -1; |
2577f55f JH |
5325 | continue_hostname = NULL; |
5326 | goto retry_non_continued; | |
5327 | } | |
5328 | ||
0756eb3c PH |
5329 | /* This is the end of the loop that repeats iff expired is TRUE and |
5330 | ob->delay_after_cutoff is FALSE. The second time round we will | |
5331 | try those hosts that haven't been tried since the message arrived. */ | |
5332 | ||
5333 | DEBUG(D_transport) | |
5334 | { | |
5335 | debug_printf("all IP addresses skipped or deferred at least one address\n"); | |
5336 | if (expired && !ob->delay_after_cutoff && cutoff_retry == 0) | |
5337 | debug_printf("retrying IP addresses not tried since message arrived\n"); | |
5338 | } | |
5339 | } | |
5340 | ||
5341 | ||
5342 | /* Get here if all IP addresses are skipped or defer at least one address. In | |
5343 | MUA wrapper mode, this will happen only for connection or other non-message- | |
5344 | specific failures. Force the delivery status for all addresses to FAIL. */ | |
5345 | ||
5346 | if (mua_wrapper) | |
5347 | { | |
d7978c0f | 5348 | for (address_item * addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
5349 | addr->transport_return = FAIL; |
5350 | goto END_TRANSPORT; | |
5351 | } | |
5352 | ||
5353 | /* In the normal, non-wrapper case, add a standard message to each deferred | |
5354 | address if there hasn't been an error, that is, if it hasn't actually been | |
5355 | tried this time. The variable "expired" will be FALSE if any deliveries were | |
5356 | actually tried, or if there was at least one host that was not expired. That | |
5357 | is, it is TRUE only if no deliveries were tried and all hosts were expired. If | |
5358 | a delivery has been tried, an error code will be set, and the failing of the | |
5359 | message is handled by the retry code later. | |
5360 | ||
5361 | If queue_smtp is set, or this transport was called to send a subsequent message | |
5362 | down an existing TCP/IP connection, and something caused the host not to be | |
5363 | found, we end up here, but can detect these cases and handle them specially. */ | |
5364 | ||
d7978c0f | 5365 | for (address_item * addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
5366 | { |
5367 | /* If host is not NULL, it means that we stopped processing the host list | |
533244af PH |
5368 | because of hosts_max_try or hosts_max_try_hardlimit. In the former case, this |
5369 | means we need to behave as if some hosts were skipped because their retry | |
5370 | time had not come. Specifically, this prevents the address from timing out. | |
8e669ac1 | 5371 | However, if we have hit hosts_max_try_hardlimit, we want to behave as if all |
533244af | 5372 | hosts were tried. */ |
0756eb3c | 5373 | |
c3f2eb9a | 5374 | if (host) |
533244af PH |
5375 | if (total_hosts_tried >= ob->hosts_max_try_hardlimit) |
5376 | { | |
5377 | DEBUG(D_transport) | |
5378 | debug_printf("hosts_max_try_hardlimit reached: behave as if all " | |
5379 | "hosts were tried\n"); | |
5380 | } | |
5381 | else | |
8e669ac1 | 5382 | { |
533244af PH |
5383 | DEBUG(D_transport) |
5384 | debug_printf("hosts_max_try limit caused some hosts to be skipped\n"); | |
5385 | setflag(addr, af_retry_skipped); | |
8e669ac1 | 5386 | } |
0756eb3c | 5387 | |
8768d548 | 5388 | if (f.queue_smtp) /* no deliveries attempted */ |
0756eb3c PH |
5389 | { |
5390 | addr->transport_return = DEFER; | |
5391 | addr->basic_errno = 0; | |
5392 | addr->message = US"SMTP delivery explicitly queued"; | |
5393 | } | |
5394 | ||
c3f2eb9a JH |
5395 | else if ( addr->transport_return == DEFER |
5396 | && (addr->basic_errno == ERRNO_UNKNOWNERROR || addr->basic_errno == 0) | |
5397 | && !addr->message | |
5398 | ) | |
0756eb3c PH |
5399 | { |
5400 | addr->basic_errno = ERRNO_HRETRY; | |
c3f2eb9a | 5401 | if (continue_hostname) |
0756eb3c | 5402 | addr->message = US"no host found for existing SMTP connection"; |
0756eb3c PH |
5403 | else if (expired) |
5404 | { | |
fffffe4c | 5405 | setflag(addr, af_pass_message); /* This is not a security risk */ |
c3f2eb9a JH |
5406 | addr->message = string_sprintf( |
5407 | "all hosts%s have been failing for a long time %s", | |
5408 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US"", | |
5409 | ob->delay_after_cutoff | |
5410 | ? US"(and retry time not reached)" | |
5411 | : US"and were last tried after this message arrived"); | |
0756eb3c PH |
5412 | |
5413 | /* If we are already using fallback hosts, or there are no fallback hosts | |
5414 | defined, convert the result to FAIL to cause a bounce. */ | |
5415 | ||
c3f2eb9a | 5416 | if (addr->host_list == addr->fallback_hosts || !addr->fallback_hosts) |
0756eb3c PH |
5417 | addr->transport_return = FAIL; |
5418 | } | |
5419 | else | |
5420 | { | |
93a680e4 | 5421 | const char * s; |
0756eb3c | 5422 | if (hosts_retry == hosts_total) |
93a680e4 | 5423 | s = "retry time not reached for any host%s"; |
0756eb3c | 5424 | else if (hosts_fail == hosts_total) |
93a680e4 | 5425 | s = "all host address lookups%s failed permanently"; |
0756eb3c | 5426 | else if (hosts_defer == hosts_total) |
93a680e4 | 5427 | s = "all host address lookups%s failed temporarily"; |
0756eb3c | 5428 | else if (hosts_serial == hosts_total) |
93a680e4 | 5429 | s = "connection limit reached for all hosts%s"; |
0756eb3c | 5430 | else if (hosts_fail+hosts_defer == hosts_total) |
93a680e4 | 5431 | s = "all host address lookups%s failed"; |
3cf01803 | 5432 | else |
93a680e4 | 5433 | s = "some host address lookups failed and retry time " |
3cf01803 JH |
5434 | "not reached for other hosts or connection limit reached%s"; |
5435 | ||
5436 | addr->message = string_sprintf(s, | |
5437 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US""); | |
0756eb3c PH |
5438 | } |
5439 | } | |
5440 | } | |
5441 | ||
5442 | /* Update the database which keeps information about which messages are waiting | |
f6c332bd PH |
5443 | for which hosts to become available. For some message-specific errors, the |
5444 | update_waiting flag is turned off because we don't want follow-on deliveries in | |
ea722490 | 5445 | those cases. If this transport instance is explicitly limited to one message |
8b260705 PP |
5446 | per connection then follow-on deliveries are not possible and there's no need |
5447 | to create/update the per-transport wait-<transport_name> database. */ | |
0756eb3c | 5448 | |
ea722490 JH |
5449 | if (update_waiting && tblock->connection_max_messages != 1) |
5450 | transport_update_waiting(hostlist, tblock->name); | |
0756eb3c PH |
5451 | |
5452 | END_TRANSPORT: | |
5453 | ||
5454 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
5455 | ||
5456 | return TRUE; /* Each address has its status */ | |
5457 | } | |
5458 | ||
d185889f | 5459 | #endif /*!MACRO_PREDEF*/ |
578897ea JH |
5460 | /* vi: aw ai sw=2 |
5461 | */ | |
0756eb3c | 5462 | /* End of transport/smtp.c */ |