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 | ||
0756eb3c PH |
11 | |
12 | /* Options specific to the smtp transport. This transport also supports LMTP | |
13 | over TCP/IP. The options must be in alphabetic order (note that "_" comes | |
14 | before the lower case letters). Some live in the transport_instance block so as | |
15 | to be publicly visible; these are flagged with opt_public. */ | |
16 | ||
17 | optionlist smtp_transport_options[] = { | |
506900af JH |
18 | { "*expand_multi_domain", opt_stringptr | opt_hidden | opt_public, |
19 | (void *)offsetof(transport_instance, expand_multi_domain) }, | |
9c695f6d JH |
20 | { "*expand_retry_include_ip_address", opt_stringptr | opt_hidden, |
21 | (void *)(offsetof(smtp_transport_options_block, expand_retry_include_ip_address)) }, | |
22 | ||
48c7f9e2 PH |
23 | { "address_retry_include_sender", opt_bool, |
24 | (void *)offsetof(smtp_transport_options_block, address_retry_include_sender) }, | |
0756eb3c PH |
25 | { "allow_localhost", opt_bool, |
26 | (void *)offsetof(smtp_transport_options_block, allow_localhost) }, | |
617d3932 JH |
27 | #ifdef EXPERIMENTAL_ARC |
28 | { "arc_sign", opt_stringptr, | |
29 | (void *)offsetof(smtp_transport_options_block, arc_sign) }, | |
30 | #endif | |
0756eb3c PH |
31 | { "authenticated_sender", opt_stringptr, |
32 | (void *)offsetof(smtp_transport_options_block, authenticated_sender) }, | |
382afc6b PH |
33 | { "authenticated_sender_force", opt_bool, |
34 | (void *)offsetof(smtp_transport_options_block, authenticated_sender_force) }, | |
0756eb3c PH |
35 | { "command_timeout", opt_time, |
36 | (void *)offsetof(smtp_transport_options_block, command_timeout) }, | |
37 | { "connect_timeout", opt_time, | |
38 | (void *)offsetof(smtp_transport_options_block, connect_timeout) }, | |
39 | { "connection_max_messages", opt_int | opt_public, | |
40 | (void *)offsetof(transport_instance, connection_max_messages) }, | |
5ec37a55 PP |
41 | # ifdef SUPPORT_DANE |
42 | { "dane_require_tls_ciphers", opt_stringptr, | |
43 | (void *)offsetof(smtp_transport_options_block, dane_require_tls_ciphers) }, | |
44 | # endif | |
0756eb3c PH |
45 | { "data_timeout", opt_time, |
46 | (void *)offsetof(smtp_transport_options_block, data_timeout) }, | |
47 | { "delay_after_cutoff", opt_bool, | |
48 | (void *)offsetof(smtp_transport_options_block, delay_after_cutoff) }, | |
80a47a2c | 49 | #ifndef DISABLE_DKIM |
f7572e5a | 50 | { "dkim_canon", opt_stringptr, |
ff5aac2b | 51 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_canon) }, |
f7572e5a | 52 | { "dkim_domain", opt_stringptr, |
ff5aac2b | 53 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_domain) }, |
d73e45df JH |
54 | { "dkim_hash", opt_stringptr, |
55 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_hash) }, | |
7c6ec81b JH |
56 | { "dkim_identity", opt_stringptr, |
57 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_identity) }, | |
f7572e5a | 58 | { "dkim_private_key", opt_stringptr, |
ff5aac2b | 59 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_private_key) }, |
f7572e5a | 60 | { "dkim_selector", opt_stringptr, |
ff5aac2b | 61 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_selector) }, |
f7572e5a | 62 | { "dkim_sign_headers", opt_stringptr, |
ff5aac2b | 63 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_sign_headers) }, |
f7572e5a | 64 | { "dkim_strict", opt_stringptr, |
ff5aac2b | 65 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_strict) }, |
2bc0f45e JH |
66 | { "dkim_timestamps", opt_stringptr, |
67 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_timestamps) }, | |
80a47a2c | 68 | #endif |
0756eb3c PH |
69 | { "dns_qualify_single", opt_bool, |
70 | (void *)offsetof(smtp_transport_options_block, dns_qualify_single) }, | |
71 | { "dns_search_parents", opt_bool, | |
72 | (void *)offsetof(smtp_transport_options_block, dns_search_parents) }, | |
578897ea | 73 | { "dnssec_request_domains", opt_stringptr, |
7cd171b7 | 74 | (void *)offsetof(smtp_transport_options_block, dnssec.request) }, |
578897ea | 75 | { "dnssec_require_domains", opt_stringptr, |
7cd171b7 | 76 | (void *)offsetof(smtp_transport_options_block, dnssec.require) }, |
9e4f5962 PP |
77 | { "dscp", opt_stringptr, |
78 | (void *)offsetof(smtp_transport_options_block, dscp) }, | |
0756eb3c PH |
79 | { "fallback_hosts", opt_stringptr, |
80 | (void *)offsetof(smtp_transport_options_block, fallback_hosts) }, | |
81 | { "final_timeout", opt_time, | |
82 | (void *)offsetof(smtp_transport_options_block, final_timeout) }, | |
83 | { "gethostbyname", opt_bool, | |
84 | (void *)offsetof(smtp_transport_options_block, gethostbyname) }, | |
85 | { "helo_data", opt_stringptr, | |
86 | (void *)offsetof(smtp_transport_options_block, helo_data) }, | |
87 | { "hosts", opt_stringptr, | |
88 | (void *)offsetof(smtp_transport_options_block, hosts) }, | |
89 | { "hosts_avoid_esmtp", opt_stringptr, | |
90 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_esmtp) }, | |
c51b8e75 PH |
91 | { "hosts_avoid_pipelining", opt_stringptr, |
92 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_pipelining) }, | |
80a47a2c | 93 | #ifdef SUPPORT_TLS |
0756eb3c PH |
94 | { "hosts_avoid_tls", opt_stringptr, |
95 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_tls) }, | |
80a47a2c | 96 | #endif |
0756eb3c PH |
97 | { "hosts_max_try", opt_int, |
98 | (void *)offsetof(smtp_transport_options_block, hosts_max_try) }, | |
533244af PH |
99 | { "hosts_max_try_hardlimit", opt_int, |
100 | (void *)offsetof(smtp_transport_options_block, hosts_max_try_hardlimit) }, | |
80a47a2c | 101 | #ifdef SUPPORT_TLS |
0756eb3c PH |
102 | { "hosts_nopass_tls", opt_stringptr, |
103 | (void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) }, | |
875512a3 JH |
104 | { "hosts_noproxy_tls", opt_stringptr, |
105 | (void *)offsetof(smtp_transport_options_block, hosts_noproxy_tls) }, | |
80a47a2c | 106 | #endif |
0756eb3c PH |
107 | { "hosts_override", opt_bool, |
108 | (void *)offsetof(smtp_transport_options_block, hosts_override) }, | |
109 | { "hosts_randomize", opt_bool, | |
110 | (void *)offsetof(smtp_transport_options_block, hosts_randomize) }, | |
f2de3a33 | 111 | #if defined(SUPPORT_TLS) && !defined(DISABLE_OCSP) |
44662487 JH |
112 | { "hosts_request_ocsp", opt_stringptr, |
113 | (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) }, | |
114 | #endif | |
0756eb3c PH |
115 | { "hosts_require_auth", opt_stringptr, |
116 | (void *)offsetof(smtp_transport_options_block, hosts_require_auth) }, | |
80a47a2c | 117 | #ifdef SUPPORT_TLS |
c0635b6d | 118 | # ifdef SUPPORT_DANE |
7a31d643 JH |
119 | { "hosts_require_dane", opt_stringptr, |
120 | (void *)offsetof(smtp_transport_options_block, hosts_require_dane) }, | |
121 | # endif | |
f2de3a33 | 122 | # ifndef DISABLE_OCSP |
f5d78688 JH |
123 | { "hosts_require_ocsp", opt_stringptr, |
124 | (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) }, | |
125 | # endif | |
0756eb3c PH |
126 | { "hosts_require_tls", opt_stringptr, |
127 | (void *)offsetof(smtp_transport_options_block, hosts_require_tls) }, | |
80a47a2c | 128 | #endif |
0756eb3c PH |
129 | { "hosts_try_auth", opt_stringptr, |
130 | (void *)offsetof(smtp_transport_options_block, hosts_try_auth) }, | |
f98442df JH |
131 | { "hosts_try_chunking", opt_stringptr, |
132 | (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) }, | |
c0635b6d | 133 | #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE) |
96e47838 TL |
134 | { "hosts_try_dane", opt_stringptr, |
135 | (void *)offsetof(smtp_transport_options_block, hosts_try_dane) }, | |
136 | #endif | |
fb05276a JH |
137 | { "hosts_try_fastopen", opt_stringptr, |
138 | (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) }, | |
8ccd00b1 | 139 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
140 | { "hosts_try_prdr", opt_stringptr, |
141 | (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) }, | |
142 | #endif | |
99400968 JH |
143 | #ifdef SUPPORT_TLS |
144 | { "hosts_verify_avoid_tls", opt_stringptr, | |
145 | (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) }, | |
146 | #endif | |
0756eb3c PH |
147 | { "interface", opt_stringptr, |
148 | (void *)offsetof(smtp_transport_options_block, interface) }, | |
149 | { "keepalive", opt_bool, | |
150 | (void *)offsetof(smtp_transport_options_block, keepalive) }, | |
f1513293 PH |
151 | { "lmtp_ignore_quota", opt_bool, |
152 | (void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) }, | |
0756eb3c PH |
153 | { "max_rcpt", opt_int | opt_public, |
154 | (void *)offsetof(transport_instance, max_addresses) }, | |
506900af | 155 | { "multi_domain", opt_expand_bool | opt_public, |
0756eb3c PH |
156 | (void *)offsetof(transport_instance, multi_domain) }, |
157 | { "port", opt_stringptr, | |
158 | (void *)offsetof(smtp_transport_options_block, port) }, | |
159 | { "protocol", opt_stringptr, | |
160 | (void *)offsetof(smtp_transport_options_block, protocol) }, | |
9c695f6d | 161 | { "retry_include_ip_address", opt_expand_bool, |
0756eb3c PH |
162 | (void *)offsetof(smtp_transport_options_block, retry_include_ip_address) }, |
163 | { "serialize_hosts", opt_stringptr, | |
164 | (void *)offsetof(smtp_transport_options_block, serialize_hosts) }, | |
165 | { "size_addition", opt_int, | |
166 | (void *)offsetof(smtp_transport_options_block, size_addition) } | |
f0989ec0 | 167 | #ifdef SUPPORT_SOCKS |
7eb6c37c JH |
168 | ,{ "socks_proxy", opt_stringptr, |
169 | (void *)offsetof(smtp_transport_options_block, socks_proxy) } | |
170 | #endif | |
80a47a2c | 171 | #ifdef SUPPORT_TLS |
0756eb3c PH |
172 | ,{ "tls_certificate", opt_stringptr, |
173 | (void *)offsetof(smtp_transport_options_block, tls_certificate) }, | |
174 | { "tls_crl", opt_stringptr, | |
175 | (void *)offsetof(smtp_transport_options_block, tls_crl) }, | |
54c90be1 PP |
176 | { "tls_dh_min_bits", opt_int, |
177 | (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) }, | |
0756eb3c PH |
178 | { "tls_privatekey", opt_stringptr, |
179 | (void *)offsetof(smtp_transport_options_block, tls_privatekey) }, | |
3f0945ff | 180 | { "tls_require_ciphers", opt_stringptr, |
0756eb3c | 181 | (void *)offsetof(smtp_transport_options_block, tls_require_ciphers) }, |
3f0945ff PP |
182 | { "tls_sni", opt_stringptr, |
183 | (void *)offsetof(smtp_transport_options_block, tls_sni) }, | |
0756eb3c PH |
184 | { "tls_tempfail_tryclear", opt_bool, |
185 | (void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) }, | |
a63be306 WB |
186 | { "tls_try_verify_hosts", opt_stringptr, |
187 | (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) }, | |
e51c7be2 JH |
188 | { "tls_verify_cert_hostnames", opt_stringptr, |
189 | (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)}, | |
0756eb3c | 190 | { "tls_verify_certificates", opt_stringptr, |
a63be306 WB |
191 | (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) }, |
192 | { "tls_verify_hosts", opt_stringptr, | |
71c15846 JH |
193 | (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) }, |
194 | #endif | |
195 | #ifdef SUPPORT_I18N | |
196 | { "utf8_downconvert", opt_stringptr, | |
197 | (void *)offsetof(smtp_transport_options_block, utf8_downconvert) }, | |
80a47a2c | 198 | #endif |
0756eb3c PH |
199 | }; |
200 | ||
201 | /* Size of the options list. An extern variable has to be used so that its | |
202 | address can appear in the tables drtables.c. */ | |
203 | ||
71c15846 | 204 | int smtp_transport_options_count = nelem(smtp_transport_options); |
0756eb3c | 205 | |
d185889f JH |
206 | |
207 | #ifdef MACRO_PREDEF | |
208 | ||
209 | /* Dummy values */ | |
210 | smtp_transport_options_block smtp_transport_option_defaults = {0}; | |
211 | void smtp_transport_init(transport_instance *tblock) {} | |
212 | BOOL smtp_transport_entry(transport_instance *tblock, address_item *addr) {return FALSE;} | |
213 | void smtp_transport_closedown(transport_instance *tblock) {} | |
214 | ||
215 | #else /*!MACRO_PREDEF*/ | |
216 | ||
217 | ||
0756eb3c PH |
218 | /* Default private options block for the smtp transport. */ |
219 | ||
220 | smtp_transport_options_block smtp_transport_option_defaults = { | |
838d897c | 221 | .hosts = NULL, |
847cd15f | 222 | .fallback_hosts = NULL, |
838d897c JH |
223 | .hostlist = NULL, |
224 | .fallback_hostlist = NULL, | |
838d897c JH |
225 | .helo_data = US"$primary_hostname", |
226 | .interface = NULL, | |
227 | .port = NULL, | |
228 | .protocol = US"smtp", | |
229 | .dscp = NULL, | |
230 | .serialize_hosts = NULL, | |
231 | .hosts_try_auth = NULL, | |
232 | .hosts_require_auth = NULL, | |
233 | .hosts_try_chunking = US"*", | |
c0635b6d | 234 | #ifdef SUPPORT_DANE |
838d897c JH |
235 | .hosts_try_dane = NULL, |
236 | .hosts_require_dane = NULL, | |
5ec37a55 | 237 | .dane_require_tls_ciphers = NULL, |
96e47838 | 238 | #endif |
838d897c | 239 | .hosts_try_fastopen = NULL, |
8ccd00b1 | 240 | #ifndef DISABLE_PRDR |
838d897c | 241 | .hosts_try_prdr = US"*", |
f5d78688 | 242 | #endif |
f2de3a33 | 243 | #ifndef DISABLE_OCSP |
838d897c JH |
244 | .hosts_request_ocsp = US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */ |
245 | .hosts_require_ocsp = NULL, | |
fd98a5c6 | 246 | #endif |
838d897c JH |
247 | .hosts_require_tls = NULL, |
248 | .hosts_avoid_tls = NULL, | |
249 | .hosts_verify_avoid_tls = NULL, | |
250 | .hosts_avoid_pipelining = NULL, | |
251 | .hosts_avoid_esmtp = NULL, | |
57cc2785 | 252 | #ifdef SUPPORT_TLS |
838d897c JH |
253 | .hosts_nopass_tls = NULL, |
254 | .hosts_noproxy_tls = US"*", | |
57cc2785 | 255 | #endif |
838d897c JH |
256 | .command_timeout = 5*60, |
257 | .connect_timeout = 5*60, | |
258 | .data_timeout = 5*60, | |
259 | .final_timeout = 10*60, | |
260 | .size_addition = 1024, | |
261 | .hosts_max_try = 5, | |
262 | .hosts_max_try_hardlimit = 50, | |
263 | .address_retry_include_sender = TRUE, | |
264 | .allow_localhost = FALSE, | |
265 | .authenticated_sender_force = FALSE, | |
266 | .gethostbyname = FALSE, | |
267 | .dns_qualify_single = TRUE, | |
268 | .dns_search_parents = FALSE, | |
269 | .dnssec = { .request=NULL, .require=NULL }, | |
270 | .delay_after_cutoff = TRUE, | |
271 | .hosts_override = FALSE, | |
272 | .hosts_randomize = FALSE, | |
273 | .keepalive = TRUE, | |
274 | .lmtp_ignore_quota = FALSE, | |
275 | .expand_retry_include_ip_address = NULL, | |
276 | .retry_include_ip_address = TRUE, | |
f0989ec0 | 277 | #ifdef SUPPORT_SOCKS |
838d897c | 278 | .socks_proxy = NULL, |
b8bf753b | 279 | #endif |
80a47a2c | 280 | #ifdef SUPPORT_TLS |
838d897c JH |
281 | .tls_certificate = NULL, |
282 | .tls_crl = NULL, | |
283 | .tls_privatekey = NULL, | |
284 | .tls_require_ciphers = NULL, | |
285 | .tls_sni = NULL, | |
286 | .tls_verify_certificates = US"system", | |
287 | .tls_dh_min_bits = EXIM_CLIENT_DH_DEFAULT_MIN_BITS, | |
288 | .tls_tempfail_tryclear = TRUE, | |
289 | .tls_verify_hosts = NULL, | |
290 | .tls_try_verify_hosts = US"*", | |
291 | .tls_verify_cert_hostnames = US"*", | |
80a47a2c | 292 | #endif |
71c15846 JH |
293 | #ifdef SUPPORT_I18N |
294 | .utf8_downconvert = NULL, | |
295 | #endif | |
80a47a2c | 296 | #ifndef DISABLE_DKIM |
838d897c JH |
297 | .dkim = |
298 | {.dkim_domain = NULL, | |
7c6ec81b | 299 | .dkim_identity = NULL, |
838d897c JH |
300 | .dkim_private_key = NULL, |
301 | .dkim_selector = NULL, | |
302 | .dkim_canon = NULL, | |
7c6ec81b | 303 | .dkim_sign_headers = NULL, |
838d897c | 304 | .dkim_strict = NULL, |
d73e45df | 305 | .dkim_hash = US"sha256", |
2bc0f45e | 306 | .dkim_timestamps = NULL, |
617d3932 JH |
307 | .dot_stuffed = FALSE, |
308 | .force_bodyhash = FALSE, | |
309 | # ifdef EXPERIMENTAL_ARC | |
310 | .arc_signspec = NULL, | |
311 | # endif | |
312 | }, | |
313 | # ifdef EXPERIMENTAL_ARC | |
314 | .arc_sign = NULL, | |
315 | # endif | |
80a47a2c | 316 | #endif |
0756eb3c PH |
317 | }; |
318 | ||
6c1c3d1d WB |
319 | /* some DSN flags for use later */ |
320 | ||
321 | static int rf_list[] = {rf_notify_never, rf_notify_success, | |
322 | rf_notify_failure, rf_notify_delay }; | |
323 | ||
45500060 | 324 | static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" }; |
6c1c3d1d WB |
325 | |
326 | ||
0756eb3c PH |
327 | |
328 | /* Local statics */ | |
329 | ||
87cb4a16 JH |
330 | static uschar *smtp_command; /* Points to last cmd for error messages */ |
331 | static uschar *mail_command; /* Points to MAIL cmd for error messages */ | |
332 | static uschar *data_command = US""; /* Points to DATA cmd for error messages */ | |
333 | static BOOL update_waiting; /* TRUE to update the "wait" database */ | |
875512a3 JH |
334 | |
335 | /*XXX move to smtp_context */ | |
87cb4a16 | 336 | static BOOL pipelining_active; /* current transaction is in pipe mode */ |
0756eb3c PH |
337 | |
338 | ||
339 | /************************************************* | |
340 | * Setup entry point * | |
341 | *************************************************/ | |
342 | ||
343 | /* This function is called when the transport is about to be used, | |
344 | but before running it in a sub-process. It is used for two things: | |
345 | ||
346 | (1) To set the fallback host list in addresses, when delivering. | |
26da7e20 PH |
347 | (2) To pass back the interface, port, protocol, and other options, for use |
348 | during callout verification. | |
0756eb3c PH |
349 | |
350 | Arguments: | |
351 | tblock pointer to the transport instance block | |
352 | addrlist list of addresses about to be transported | |
353 | tf if not NULL, pointer to block in which to return options | |
929ba01c PH |
354 | uid the uid that will be set (not used) |
355 | gid the gid that will be set (not used) | |
0756eb3c PH |
356 | errmsg place for error message (not used) |
357 | ||
358 | Returns: OK always (FAIL, DEFER not used) | |
359 | */ | |
360 | ||
361 | static int | |
362 | smtp_transport_setup(transport_instance *tblock, address_item *addrlist, | |
929ba01c | 363 | transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg) |
0756eb3c PH |
364 | { |
365 | smtp_transport_options_block *ob = | |
366 | (smtp_transport_options_block *)(tblock->options_block); | |
367 | ||
368 | errmsg = errmsg; /* Keep picky compilers happy */ | |
929ba01c PH |
369 | uid = uid; |
370 | gid = gid; | |
0756eb3c PH |
371 | |
372 | /* Pass back options if required. This interface is getting very messy. */ | |
373 | ||
02b41d71 | 374 | if (tf) |
0756eb3c PH |
375 | { |
376 | tf->interface = ob->interface; | |
377 | tf->port = ob->port; | |
378 | tf->protocol = ob->protocol; | |
379 | tf->hosts = ob->hosts; | |
380 | tf->hosts_override = ob->hosts_override; | |
381 | tf->hosts_randomize = ob->hosts_randomize; | |
382 | tf->gethostbyname = ob->gethostbyname; | |
383 | tf->qualify_single = ob->dns_qualify_single; | |
384 | tf->search_parents = ob->dns_search_parents; | |
26da7e20 | 385 | tf->helo_data = ob->helo_data; |
0756eb3c PH |
386 | } |
387 | ||
388 | /* Set the fallback host list for all the addresses that don't have fallback | |
389 | host lists, provided that the local host wasn't present in the original host | |
390 | list. */ | |
391 | ||
392 | if (!testflag(addrlist, af_local_host_removed)) | |
02b41d71 JH |
393 | for (; addrlist; addrlist = addrlist->next) |
394 | if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist; | |
0756eb3c PH |
395 | |
396 | return OK; | |
397 | } | |
398 | ||
399 | ||
400 | ||
401 | /************************************************* | |
402 | * Initialization entry point * | |
403 | *************************************************/ | |
404 | ||
405 | /* Called for each instance, after its options have been read, to | |
406 | enable consistency checks to be done, or anything else that needs | |
407 | to be set up. | |
408 | ||
409 | Argument: pointer to the transport instance block | |
410 | Returns: nothing | |
411 | */ | |
412 | ||
413 | void | |
414 | smtp_transport_init(transport_instance *tblock) | |
415 | { | |
416 | smtp_transport_options_block *ob = | |
417 | (smtp_transport_options_block *)(tblock->options_block); | |
418 | ||
419 | /* Retry_use_local_part defaults FALSE if unset */ | |
420 | ||
421 | if (tblock->retry_use_local_part == TRUE_UNSET) | |
422 | tblock->retry_use_local_part = FALSE; | |
423 | ||
424 | /* Set the default port according to the protocol */ | |
425 | ||
426 | if (ob->port == NULL) | |
061b7ebd PP |
427 | ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" : |
428 | (strcmpic(ob->protocol, US"smtps") == 0)? US"smtps" : US"smtp"; | |
0756eb3c PH |
429 | |
430 | /* Set up the setup entry point, to be called before subprocesses for this | |
431 | transport. */ | |
432 | ||
433 | tblock->setup = smtp_transport_setup; | |
434 | ||
435 | /* Complain if any of the timeouts are zero. */ | |
436 | ||
437 | if (ob->command_timeout <= 0 || ob->data_timeout <= 0 || | |
438 | ob->final_timeout <= 0) | |
439 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
440 | "command, data, or final timeout value is zero for %s transport", | |
441 | tblock->name); | |
442 | ||
443 | /* If hosts_override is set and there are local hosts, set the global | |
444 | flag that stops verify from showing router hosts. */ | |
445 | ||
446 | if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE; | |
447 | ||
448 | /* If there are any fallback hosts listed, build a chain of host items | |
449 | for them, but do not do any lookups at this time. */ | |
450 | ||
451 | host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE); | |
452 | } | |
453 | ||
454 | ||
455 | ||
456 | ||
457 | ||
458 | /************************************************* | |
459 | * Set delivery info into all active addresses * | |
460 | *************************************************/ | |
461 | ||
462 | /* Only addresses whose status is >= PENDING are relevant. A lesser | |
463 | status means that an address is not currently being processed. | |
464 | ||
465 | Arguments: | |
447d236c PH |
466 | addrlist points to a chain of addresses |
467 | errno_value to put in each address's errno field | |
468 | msg to put in each address's message field | |
469 | rc to put in each address's transport_return field | |
470 | pass_message if TRUE, set the "pass message" flag in the address | |
c562fd30 | 471 | host if set, mark addrs as having used this host |
895fbaf2 JH |
472 | smtp_greeting from peer |
473 | helo_response from peer | |
0756eb3c PH |
474 | |
475 | If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in | |
476 | the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate | |
477 | this particular type of timeout. | |
478 | ||
479 | Returns: nothing | |
480 | */ | |
481 | ||
7cd1141b PH |
482 | static void |
483 | set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
895fbaf2 JH |
484 | BOOL pass_message, host_item * host |
485 | #ifdef EXPERIMENTAL_DSN_INFO | |
486 | , const uschar * smtp_greeting, const uschar * helo_response | |
487 | #endif | |
488 | ) | |
0756eb3c PH |
489 | { |
490 | address_item *addr; | |
491 | int orvalue = 0; | |
492 | if (errno_value == ERRNO_CONNECTTIMEOUT) | |
493 | { | |
494 | errno_value = ETIMEDOUT; | |
495 | orvalue = RTEF_CTOUT; | |
496 | } | |
895fbaf2 | 497 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b | 498 | if (addr->transport_return >= PENDING) |
447d236c | 499 | { |
168dec3b JH |
500 | addr->basic_errno = errno_value; |
501 | addr->more_errno |= orvalue; | |
02b41d71 | 502 | if (msg) |
168dec3b JH |
503 | { |
504 | addr->message = msg; | |
505 | if (pass_message) setflag(addr, af_pass_message); | |
506 | } | |
507 | addr->transport_return = rc; | |
508 | if (host) | |
895fbaf2 | 509 | { |
168dec3b | 510 | addr->host_used = host; |
895fbaf2 JH |
511 | #ifdef EXPERIMENTAL_DSN_INFO |
512 | if (smtp_greeting) | |
513 | {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';} | |
514 | addr->smtp_greeting = smtp_greeting; | |
515 | ||
516 | if (helo_response) | |
517 | {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';} | |
518 | addr->helo_response = helo_response; | |
519 | #endif | |
520 | } | |
447d236c | 521 | } |
0756eb3c PH |
522 | } |
523 | ||
895fbaf2 JH |
524 | static void |
525 | set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
526 | BOOL pass_message) | |
527 | { | |
528 | set_errno(addrlist, errno_value, msg, rc, pass_message, NULL | |
529 | #ifdef EXPERIMENTAL_DSN_INFO | |
530 | , NULL, NULL | |
531 | #endif | |
532 | ); | |
533 | } | |
0756eb3c PH |
534 | |
535 | ||
536 | /************************************************* | |
537 | * Check an SMTP response * | |
538 | *************************************************/ | |
539 | ||
540 | /* This function is given an errno code and the SMTP response buffer | |
541 | to analyse, together with the host identification for generating messages. It | |
542 | sets an appropriate message and puts the first digit of the response code into | |
543 | the yield variable. If no response was actually read, a suitable digit is | |
544 | chosen. | |
545 | ||
546 | Arguments: | |
447d236c PH |
547 | host the current host, to get its name for messages |
548 | errno_value pointer to the errno value | |
549 | more_errno from the top address for use with ERRNO_FILTER_FAIL | |
550 | buffer the SMTP response buffer | |
551 | yield where to put a one-digit SMTP response code | |
4c04137d | 552 | message where to put an error message |
447d236c PH |
553 | pass_message set TRUE if message is an SMTP response |
554 | ||
555 | Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE | |
0756eb3c PH |
556 | */ |
557 | ||
a7538db1 JH |
558 | static BOOL |
559 | check_response(host_item *host, int *errno_value, int more_errno, | |
447d236c | 560 | uschar *buffer, int *yield, uschar **message, BOOL *pass_message) |
0756eb3c | 561 | { |
0d9fa8c0 | 562 | uschar * pl = pipelining_active ? US"pipelined " : US""; |
e9166683 | 563 | const uschar * s; |
0756eb3c PH |
564 | |
565 | *yield = '4'; /* Default setting is to give a temporary error */ | |
566 | ||
e9166683 | 567 | switch(*errno_value) |
0756eb3c | 568 | { |
e9166683 JH |
569 | case ETIMEDOUT: /* Handle response timeout */ |
570 | *message = US string_sprintf("SMTP timeout after %s%s", | |
571 | pl, smtp_command); | |
572 | if (transport_count > 0) | |
573 | *message = US string_sprintf("%s (%d bytes written)", *message, | |
574 | transport_count); | |
575 | return FALSE; | |
576 | ||
577 | case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */ | |
578 | s = string_printing(buffer); | |
579 | while (isspace(*s)) s++; | |
580 | *message = *s == 0 | |
581 | ? string_sprintf("Malformed SMTP reply (an empty line) " | |
582 | "in response to %s%s", pl, smtp_command) | |
583 | : string_sprintf("Malformed SMTP reply in response to %s%s: %s", | |
584 | pl, smtp_command, s); | |
585 | return FALSE; | |
586 | ||
587 | case ERRNO_FILTER_FAIL: /* Handle a failed filter process error; | |
588 | can't send QUIT as we mustn't end the DATA. */ | |
589 | *message = string_sprintf("transport filter process failed (%d)%s", | |
590 | more_errno, | |
591 | more_errno == EX_EXECFAILED ? ": unable to execute command" : ""); | |
592 | return FALSE; | |
593 | ||
594 | case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion; | |
595 | can't send QUIT as we mustn't end the DATA. */ | |
596 | *message = | |
597 | string_sprintf("failed to expand headers_add or headers_remove: %s", | |
598 | expand_string_message); | |
599 | return FALSE; | |
600 | ||
601 | case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */ | |
602 | *message = string_sprintf("failed to write a data block"); | |
603 | return FALSE; | |
0756eb3c | 604 | |
8c5d388a | 605 | #ifdef SUPPORT_I18N |
e9166683 JH |
606 | case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */ |
607 | *message = US"utf8 support required but not offered for forwarding"; | |
608 | DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message); | |
609 | return TRUE; | |
250b6871 | 610 | #endif |
e9166683 | 611 | } |
250b6871 | 612 | |
0756eb3c PH |
613 | /* Handle error responses from the remote mailer. */ |
614 | ||
615 | if (buffer[0] != 0) | |
616 | { | |
e9166683 JH |
617 | *message = string_sprintf("SMTP error from remote mail server after %s%s: " |
618 | "%s", pl, smtp_command, s = string_printing(buffer)); | |
447d236c | 619 | *pass_message = TRUE; |
0756eb3c PH |
620 | *yield = buffer[0]; |
621 | return TRUE; | |
622 | } | |
623 | ||
624 | /* No data was read. If there is no errno, this must be the EOF (i.e. | |
19b9dc85 PH |
625 | connection closed) case, which causes deferral. An explicit connection reset |
626 | error has the same effect. Otherwise, put the host's identity in the message, | |
627 | leaving the errno value to be interpreted as well. In all cases, we have to | |
628 | assume the connection is now dead. */ | |
0756eb3c | 629 | |
19b9dc85 | 630 | if (*errno_value == 0 || *errno_value == ECONNRESET) |
0756eb3c PH |
631 | { |
632 | *errno_value = ERRNO_SMTPCLOSED; | |
c562fd30 | 633 | *message = US string_sprintf("Remote host closed connection " |
02b41d71 | 634 | "in response to %s%s", pl, smtp_command); |
0756eb3c | 635 | } |
de6273b4 JH |
636 | else |
637 | *message = US string_sprintf("%s [%s]", host->name, host->address); | |
0756eb3c PH |
638 | |
639 | return FALSE; | |
640 | } | |
641 | ||
642 | ||
643 | ||
644 | /************************************************* | |
645 | * Write error message to logs * | |
646 | *************************************************/ | |
647 | ||
648 | /* This writes to the main log and to the message log. | |
649 | ||
650 | Arguments: | |
0756eb3c | 651 | host the current host |
ec62d0a9 HSHR |
652 | detail the current message (addr_item->message) |
653 | basic_errno the errno (addr_item->basic_errno) | |
0756eb3c PH |
654 | |
655 | Returns: nothing | |
656 | */ | |
657 | ||
658 | static void | |
ec62d0a9 | 659 | write_logs(const host_item *host, const uschar *suffix, int basic_errno) |
0756eb3c | 660 | { |
ec62d0a9 HSHR |
661 | |
662 | ||
663 | uschar *message = LOGGING(outgoing_port) | |
584ddd64 JH |
664 | ? string_sprintf("H=%s [%s]:%d", host->name, host->address, |
665 | host->port == PORT_NONE ? 25 : host->port) | |
666 | : string_sprintf("H=%s [%s]", host->name, host->address); | |
c562fd30 | 667 | |
ec62d0a9 | 668 | if (suffix) |
0756eb3c | 669 | { |
ec62d0a9 HSHR |
670 | message = string_sprintf("%s: %s", message, suffix); |
671 | if (basic_errno > 0) | |
672 | message = string_sprintf("%s: %s", message, strerror(basic_errno)); | |
0756eb3c PH |
673 | } |
674 | else | |
ec62d0a9 HSHR |
675 | message = string_sprintf("%s %s", message, exim_errstr(basic_errno)); |
676 | ||
677 | log_write(0, LOG_MAIN, "%s", message); | |
678 | deliver_msglog("%s %s\n", tod_stamp(tod_log), message); | |
0756eb3c PH |
679 | } |
680 | ||
c562fd30 JH |
681 | static void |
682 | msglog_line(host_item * host, uschar * message) | |
683 | { | |
37f3dc43 JH |
684 | deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log), |
685 | host->name, host->address, message); | |
c562fd30 JH |
686 | } |
687 | ||
0756eb3c PH |
688 | |
689 | ||
0cbf2b82 | 690 | #ifndef DISABLE_EVENT |
d68218c7 JH |
691 | /************************************************* |
692 | * Post-defer action * | |
693 | *************************************************/ | |
694 | ||
695 | /* This expands an arbitrary per-transport string. | |
696 | It might, for example, be used to write to the database log. | |
697 | ||
698 | Arguments: | |
d68218c7 JH |
699 | addr the address item containing error information |
700 | host the current host | |
701 | ||
702 | Returns: nothing | |
703 | */ | |
704 | ||
705 | static void | |
774ef2d7 | 706 | deferred_event_raise(address_item *addr, host_item *host) |
d68218c7 | 707 | { |
774ef2d7 | 708 | uschar * action = addr->transport->event_action; |
55414b25 | 709 | const uschar * save_domain; |
a7538db1 JH |
710 | uschar * save_local; |
711 | ||
d68218c7 | 712 | if (!action) |
a7538db1 | 713 | return; |
d68218c7 | 714 | |
a7538db1 JH |
715 | save_domain = deliver_domain; |
716 | save_local = deliver_localpart; | |
717 | ||
718 | /*XXX would ip & port already be set up? */ | |
719 | deliver_host_address = string_copy(host->address); | |
774ef2d7 JH |
720 | deliver_host_port = host->port == PORT_NONE ? 25 : host->port; |
721 | event_defer_errno = addr->basic_errno; | |
d68218c7 JH |
722 | |
723 | router_name = addr->router->name; | |
724 | transport_name = addr->transport->name; | |
a7538db1 JH |
725 | deliver_domain = addr->domain; |
726 | deliver_localpart = addr->local_part; | |
727 | ||
774ef2d7 | 728 | (void) event_raise(action, US"msg:host:defer", |
a7538db1 JH |
729 | addr->message |
730 | ? addr->basic_errno > 0 | |
731 | ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno)) | |
732 | : string_copy(addr->message) | |
733 | : addr->basic_errno > 0 | |
734 | ? string_copy(US strerror(addr->basic_errno)) | |
735 | : NULL); | |
736 | ||
737 | deliver_localpart = save_local; | |
738 | deliver_domain = save_domain; | |
d68218c7 JH |
739 | router_name = transport_name = NULL; |
740 | } | |
741 | #endif | |
742 | ||
0756eb3c PH |
743 | /************************************************* |
744 | * Synchronize SMTP responses * | |
745 | *************************************************/ | |
746 | ||
747 | /* This function is called from smtp_deliver() to receive SMTP responses from | |
748 | the server, and match them up with the commands to which they relate. When | |
749 | PIPELINING is not in use, this function is called after every command, and is | |
750 | therefore somewhat over-engineered, but it is simpler to use a single scheme | |
751 | that works both with and without PIPELINING instead of having two separate sets | |
752 | of code. | |
753 | ||
754 | The set of commands that are buffered up with pipelining may start with MAIL | |
755 | and may end with DATA; in between are RCPT commands that correspond to the | |
756 | addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH, | |
757 | etc.) are never buffered. | |
758 | ||
759 | Errors after MAIL or DATA abort the whole process leaving the response in the | |
760 | buffer. After MAIL, pending responses are flushed, and the original command is | |
761 | re-instated in big_buffer for error messages. For RCPT commands, the remote is | |
762 | permitted to reject some recipient addresses while accepting others. However | |
763 | certain errors clearly abort the whole process. Set the value in | |
764 | transport_return to PENDING_OK if the address is accepted. If there is a | |
765 | subsequent general error, it will get reset accordingly. If not, it will get | |
766 | converted to OK at the end. | |
767 | ||
768 | Arguments: | |
df5b41e3 | 769 | sx smtp connection context |
48c7f9e2 | 770 | count the number of responses to read |
48c7f9e2 PH |
771 | pending_DATA 0 if last command sent was not DATA |
772 | +1 if previously had a good recipient | |
773 | -1 if not previously had a good recipient | |
0756eb3c PH |
774 | |
775 | Returns: 3 if at least one address had 2xx and one had 5xx | |
776 | 2 if at least one address had 5xx but none had 2xx | |
777 | 1 if at least one host had a 2xx response, but none had 5xx | |
778 | 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA) | |
779 | -1 timeout while reading RCPT response | |
780 | -2 I/O or other non-response error for RCPT | |
781 | -3 DATA or MAIL failed - errno and buffer set | |
782 | */ | |
783 | ||
784 | static int | |
df5b41e3 | 785 | sync_responses(smtp_context * sx, int count, int pending_DATA) |
0756eb3c | 786 | { |
df5b41e3 | 787 | address_item *addr = sx->sync_addr; |
e9166683 JH |
788 | smtp_transport_options_block *ob = |
789 | (smtp_transport_options_block *)sx->tblock->options_block; | |
0756eb3c PH |
790 | int yield = 0; |
791 | ||
792 | /* Handle the response for a MAIL command. On error, reinstate the original | |
793 | command in big_buffer for error message use, and flush any further pending | |
794 | responses before returning, except after I/O errors and timeouts. */ | |
795 | ||
df5b41e3 | 796 | if (sx->pending_MAIL) |
0756eb3c PH |
797 | { |
798 | count--; | |
e9166683 JH |
799 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
800 | '2', ob->command_timeout)) | |
0756eb3c | 801 | { |
e027f545 | 802 | DEBUG(D_transport) debug_printf("bad response for MAIL\n"); |
0756eb3c | 803 | Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */ |
df5b41e3 | 804 | if (errno == 0 && sx->buffer[0] != 0) |
0756eb3c PH |
805 | { |
806 | uschar flushbuffer[4096]; | |
e97957bc | 807 | int save_errno = 0; |
df5b41e3 | 808 | if (sx->buffer[0] == '4') |
e97957bc PH |
809 | { |
810 | save_errno = ERRNO_MAIL4XX; | |
df5b41e3 | 811 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc | 812 | } |
0756eb3c PH |
813 | while (count-- > 0) |
814 | { | |
df5b41e3 | 815 | if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer), |
e9166683 | 816 | '2', ob->command_timeout) |
0756eb3c PH |
817 | && (errno != 0 || flushbuffer[0] == 0)) |
818 | break; | |
819 | } | |
e97957bc | 820 | errno = save_errno; |
0756eb3c | 821 | } |
c562fd30 JH |
822 | |
823 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
824 | while (count-- > 0) /* Mark any pending addrs with the host used */ | |
825 | { | |
826 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
df5b41e3 | 827 | addr->host_used = sx->host; |
c562fd30 JH |
828 | addr = addr->next; |
829 | } | |
0756eb3c PH |
830 | return -3; |
831 | } | |
832 | } | |
833 | ||
834 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
835 | ||
836 | /* Read and handle the required number of RCPT responses, matching each one up | |
837 | with an address by scanning for the next address whose status is PENDING_DEFER. | |
838 | */ | |
839 | ||
840 | while (count-- > 0) | |
841 | { | |
4c2471ca JH |
842 | while (addr->transport_return != PENDING_DEFER) |
843 | if (!(addr = addr->next)) | |
844 | return -2; | |
0756eb3c PH |
845 | |
846 | /* The address was accepted */ | |
df5b41e3 | 847 | addr->host_used = sx->host; |
0756eb3c | 848 | |
e9166683 JH |
849 | if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
850 | '2', ob->command_timeout)) | |
0756eb3c PH |
851 | { |
852 | yield |= 1; | |
853 | addr->transport_return = PENDING_OK; | |
854 | ||
855 | /* If af_dr_retry_exists is set, there was a routing delay on this address; | |
09945f1e PH |
856 | ensure that any address-specific retry record is expunged. We do this both |
857 | for the basic key and for the version that also includes the sender. */ | |
0756eb3c PH |
858 | |
859 | if (testflag(addr, af_dr_retry_exists)) | |
09945f1e PH |
860 | { |
861 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, | |
862 | sender_address); | |
863 | retry_add_item(addr, altkey, rf_delete); | |
0756eb3c | 864 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
09945f1e | 865 | } |
0756eb3c PH |
866 | } |
867 | ||
868 | /* Timeout while reading the response */ | |
869 | ||
870 | else if (errno == ETIMEDOUT) | |
871 | { | |
c562fd30 | 872 | uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>", |
e9166683 | 873 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
df5b41e3 | 874 | set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE); |
0756eb3c | 875 | retry_add_item(addr, addr->address_retry_key, 0); |
f6c332bd | 876 | update_waiting = FALSE; |
0756eb3c PH |
877 | return -1; |
878 | } | |
879 | ||
880 | /* Handle other errors in obtaining an SMTP response by returning -1. This | |
881 | will cause all the addresses to be deferred. Restore the SMTP command in | |
882 | big_buffer for which we are checking the response, so the error message | |
883 | makes sense. */ | |
884 | ||
df5b41e3 | 885 | else if (errno != 0 || sx->buffer[0] == 0) |
0756eb3c PH |
886 | { |
887 | string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>", | |
df5b41e3 | 888 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
0756eb3c PH |
889 | return -2; |
890 | } | |
891 | ||
892 | /* Handle SMTP permanent and temporary response codes. */ | |
893 | ||
894 | else | |
895 | { | |
896 | addr->message = | |
447d236c | 897 | string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: " |
df5b41e3 JH |
898 | "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes), |
899 | string_printing(sx->buffer)); | |
447d236c | 900 | setflag(addr, af_pass_message); |
e9166683 JH |
901 | if (!sx->verify) |
902 | msglog_line(sx->host, addr->message); | |
0756eb3c PH |
903 | |
904 | /* The response was 5xx */ | |
905 | ||
df5b41e3 | 906 | if (sx->buffer[0] == '5') |
0756eb3c PH |
907 | { |
908 | addr->transport_return = FAIL; | |
909 | yield |= 2; | |
910 | } | |
911 | ||
912 | /* The response was 4xx */ | |
913 | ||
914 | else | |
915 | { | |
0756eb3c PH |
916 | addr->transport_return = DEFER; |
917 | addr->basic_errno = ERRNO_RCPT4XX; | |
df5b41e3 | 918 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
0756eb3c | 919 | |
e9166683 JH |
920 | if (!sx->verify) |
921 | { | |
0cbf2b82 | 922 | #ifndef DISABLE_EVENT |
e9166683 JH |
923 | event_defer_errno = addr->more_errno; |
924 | msg_event_raise(US"msg:rcpt:host:defer", addr); | |
5ef5dd52 JB |
925 | #endif |
926 | ||
e9166683 JH |
927 | /* Log temporary errors if there are more hosts to be tried. |
928 | If not, log this last one in the == line. */ | |
0756eb3c | 929 | |
e9166683 JH |
930 | if (sx->host->next) |
931 | log_write(0, LOG_MAIN, "H=%s [%s]: %s", | |
932 | sx->host->name, sx->host->address, addr->message); | |
0756eb3c | 933 | |
0cbf2b82 | 934 | #ifndef DISABLE_EVENT |
e9166683 JH |
935 | else |
936 | msg_event_raise(US"msg:rcpt:defer", addr); | |
5ef5dd52 JB |
937 | #endif |
938 | ||
e9166683 JH |
939 | /* Do not put this message on the list of those waiting for specific |
940 | hosts, as otherwise it is likely to be tried too often. */ | |
0756eb3c | 941 | |
e9166683 | 942 | update_waiting = FALSE; |
0756eb3c | 943 | |
e9166683 JH |
944 | /* Add a retry item for the address so that it doesn't get tried again |
945 | too soon. If address_retry_include_sender is true, add the sender address | |
946 | to the retry key. */ | |
0756eb3c | 947 | |
e9166683 JH |
948 | retry_add_item(addr, |
949 | ob->address_retry_include_sender | |
950 | ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address) | |
951 | : addr->address_retry_key, | |
952 | 0); | |
953 | } | |
0756eb3c PH |
954 | } |
955 | } | |
956 | } /* Loop for next RCPT response */ | |
957 | ||
958 | /* Update where to start at for the next block of responses, unless we | |
959 | have already handled all the addresses. */ | |
960 | ||
e9166683 | 961 | if (addr) sx->sync_addr = addr->next; |
0756eb3c PH |
962 | |
963 | /* Handle a response to DATA. If we have not had any good recipients, either | |
964 | previously or in this block, the response is ignored. */ | |
965 | ||
966 | if (pending_DATA != 0 && | |
e9166683 JH |
967 | !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
968 | '3', ob->command_timeout)) | |
0756eb3c PH |
969 | { |
970 | int code; | |
971 | uschar *msg; | |
447d236c | 972 | BOOL pass_message; |
e97957bc PH |
973 | if (pending_DATA > 0 || (yield & 1) != 0) |
974 | { | |
df5b41e3 | 975 | if (errno == 0 && sx->buffer[0] == '4') |
e97957bc PH |
976 | { |
977 | errno = ERRNO_DATA4XX; | |
df5b41e3 | 978 | sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc PH |
979 | } |
980 | return -3; | |
981 | } | |
df5b41e3 | 982 | (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message); |
0756eb3c PH |
983 | DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining " |
984 | "is in use and there were no good recipients\n", msg); | |
985 | } | |
986 | ||
987 | /* All responses read and handled; MAIL (if present) received 2xx and DATA (if | |
988 | present) received 3xx. If any RCPTs were handled and yielded anything other | |
989 | than 4xx, yield will be set non-zero. */ | |
990 | ||
991 | return yield; | |
992 | } | |
993 | ||
994 | ||
995 | ||
fcc8e047 JH |
996 | /* Do the client side of smtp-level authentication */ |
997 | /* | |
998 | Arguments: | |
999 | buffer EHLO response from server (gets overwritten) | |
1000 | addrlist chain of potential addresses to deliver | |
1001 | host host to deliver to | |
1002 | ob transport options | |
1003 | ibp, obp comms channel control blocks | |
1004 | ||
1005 | Returns: | |
1006 | OK Success, or failed (but not required): global "smtp_authenticated" set | |
1007 | DEFER Failed authentication (and was required) | |
1008 | ERROR Internal problem | |
1009 | ||
1010 | FAIL_SEND Failed communications - transmit | |
1011 | FAIL - response | |
1012 | */ | |
1013 | ||
1014 | int | |
1015 | smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host, | |
1016 | smtp_transport_options_block *ob, BOOL is_esmtp, | |
1017 | smtp_inblock *ibp, smtp_outblock *obp) | |
1018 | { | |
a7538db1 JH |
1019 | int require_auth; |
1020 | uschar *fail_reason = US"server did not advertise AUTH support"; | |
fcc8e047 | 1021 | |
a7538db1 JH |
1022 | smtp_authenticated = FALSE; |
1023 | client_authenticator = client_authenticated_id = client_authenticated_sender = NULL; | |
5130845b | 1024 | require_auth = verify_check_given_host(&ob->hosts_require_auth, host); |
fcc8e047 | 1025 | |
a7538db1 JH |
1026 | if (is_esmtp && !regex_AUTH) regex_AUTH = |
1027 | regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)", | |
1028 | FALSE, TRUE); | |
fcc8e047 | 1029 | |
a7538db1 JH |
1030 | if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1)) |
1031 | { | |
1032 | uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
1033 | expand_nmax = -1; /* reset */ | |
fcc8e047 | 1034 | |
a7538db1 JH |
1035 | /* Must not do this check until after we have saved the result of the |
1036 | regex match above. */ | |
fcc8e047 | 1037 | |
a7538db1 | 1038 | if (require_auth == OK || |
5130845b | 1039 | verify_check_given_host(&ob->hosts_try_auth, host) == OK) |
a7538db1 JH |
1040 | { |
1041 | auth_instance *au; | |
1042 | fail_reason = US"no common mechanisms were found"; | |
fcc8e047 | 1043 | |
a7538db1 | 1044 | DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n"); |
fcc8e047 | 1045 | |
a7538db1 JH |
1046 | /* Scan the configured authenticators looking for one which is configured |
1047 | for use as a client, which is not suppressed by client_condition, and | |
1048 | whose name matches an authentication mechanism supported by the server. | |
1049 | If one is found, attempt to authenticate by calling its client function. | |
1050 | */ | |
fcc8e047 | 1051 | |
cab0c277 | 1052 | for (au = auths; !smtp_authenticated && au; au = au->next) |
a7538db1 JH |
1053 | { |
1054 | uschar *p = names; | |
1055 | if (!au->client || | |
1056 | (au->client_condition != NULL && | |
1057 | !expand_check_condition(au->client_condition, au->name, | |
1058 | US"client authenticator"))) | |
1059 | { | |
1060 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1061 | au->name, | |
1062 | (au->client)? "client_condition is false" : | |
1063 | "not configured as a client"); | |
1064 | continue; | |
1065 | } | |
fcc8e047 | 1066 | |
a7538db1 | 1067 | /* Loop to scan supported server mechanisms */ |
fcc8e047 | 1068 | |
cab0c277 | 1069 | while (*p) |
a7538db1 JH |
1070 | { |
1071 | int rc; | |
1072 | int len = Ustrlen(au->public_name); | |
1073 | while (isspace(*p)) p++; | |
fcc8e047 | 1074 | |
a7538db1 JH |
1075 | if (strncmpic(au->public_name, p, len) != 0 || |
1076 | (p[len] != 0 && !isspace(p[len]))) | |
1077 | { | |
1078 | while (*p != 0 && !isspace(*p)) p++; | |
1079 | continue; | |
1080 | } | |
fcc8e047 | 1081 | |
a7538db1 JH |
1082 | /* Found data for a listed mechanism. Call its client entry. Set |
1083 | a flag in the outblock so that data is overwritten after sending so | |
1084 | that reflections don't show it. */ | |
fcc8e047 | 1085 | |
a7538db1 JH |
1086 | fail_reason = US"authentication attempt(s) failed"; |
1087 | obp->authenticating = TRUE; | |
1088 | rc = (au->info->clientcode)(au, ibp, obp, | |
1089 | ob->command_timeout, buffer, bufsize); | |
1090 | obp->authenticating = FALSE; | |
1091 | DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n", | |
1092 | au->name, rc); | |
fcc8e047 | 1093 | |
a7538db1 JH |
1094 | /* A temporary authentication failure must hold up delivery to |
1095 | this host. After a permanent authentication failure, we carry on | |
1096 | to try other authentication methods. If all fail hard, try to | |
1097 | deliver the message unauthenticated unless require_auth was set. */ | |
fcc8e047 | 1098 | |
a7538db1 JH |
1099 | switch(rc) |
1100 | { | |
1101 | case OK: | |
1102 | smtp_authenticated = TRUE; /* stops the outer loop */ | |
1103 | client_authenticator = au->name; | |
1104 | if (au->set_client_id != NULL) | |
1105 | client_authenticated_id = expand_string(au->set_client_id); | |
1106 | break; | |
1107 | ||
1108 | /* Failure after writing a command */ | |
1109 | ||
1110 | case FAIL_SEND: | |
1111 | return FAIL_SEND; | |
1112 | ||
1113 | /* Failure after reading a response */ | |
1114 | ||
1115 | case FAIL: | |
1116 | if (errno != 0 || buffer[0] != '5') return FAIL; | |
1117 | log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s", | |
1118 | au->name, host->name, host->address, buffer); | |
1119 | break; | |
1120 | ||
1121 | /* Failure by some other means. In effect, the authenticator | |
1122 | decided it wasn't prepared to handle this case. Typically this | |
1123 | is the result of "fail" in an expansion string. Do we need to | |
1124 | log anything here? Feb 2006: a message is now put in the buffer | |
1125 | if logging is required. */ | |
1126 | ||
1127 | case CANCELLED: | |
1128 | if (*buffer != 0) | |
1129 | log_write(0, LOG_MAIN, "%s authenticator cancelled " | |
1130 | "authentication H=%s [%s] %s", au->name, host->name, | |
1131 | host->address, buffer); | |
1132 | break; | |
1133 | ||
1134 | /* Internal problem, message in buffer. */ | |
1135 | ||
1136 | case ERROR: | |
895fbaf2 JH |
1137 | set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer), |
1138 | DEFER, FALSE); | |
a7538db1 JH |
1139 | return ERROR; |
1140 | } | |
fcc8e047 | 1141 | |
a7538db1 JH |
1142 | break; /* If not authenticated, try next authenticator */ |
1143 | } /* Loop for scanning supported server mechanisms */ | |
1144 | } /* Loop for further authenticators */ | |
fcc8e047 | 1145 | } |
a7538db1 | 1146 | } |
fcc8e047 | 1147 | |
a7538db1 | 1148 | /* If we haven't authenticated, but are required to, give up. */ |
fcc8e047 | 1149 | |
a7538db1 JH |
1150 | if (require_auth == OK && !smtp_authenticated) |
1151 | { | |
895fbaf2 | 1152 | set_errno_nohost(addrlist, ERRNO_AUTHFAIL, |
a7538db1 | 1153 | string_sprintf("authentication required but %s", fail_reason), DEFER, |
895fbaf2 | 1154 | FALSE); |
a7538db1 JH |
1155 | return DEFER; |
1156 | } | |
4d8d62b9 | 1157 | |
a7538db1 | 1158 | return OK; |
fcc8e047 JH |
1159 | } |
1160 | ||
1161 | ||
1162 | /* Construct AUTH appendix string for MAIL TO */ | |
1163 | /* | |
1164 | Arguments | |
1165 | buffer to build string | |
1166 | addrlist chain of potential addresses to deliver | |
1167 | ob transport options | |
1168 | ||
1169 | Globals smtp_authenticated | |
1170 | client_authenticated_sender | |
1171 | Return True on error, otherwise buffer has (possibly empty) terminated string | |
1172 | */ | |
1173 | ||
1174 | BOOL | |
1175 | smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist, | |
1176 | smtp_transport_options_block *ob) | |
1177 | { | |
1178 | uschar *local_authenticated_sender = authenticated_sender; | |
1179 | ||
1180 | #ifdef notdef | |
1181 | debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N"); | |
1182 | #endif | |
1183 | ||
1184 | if (ob->authenticated_sender != NULL) | |
1185 | { | |
1186 | uschar *new = expand_string(ob->authenticated_sender); | |
1187 | if (new == NULL) | |
1188 | { | |
1189 | if (!expand_string_forcedfail) | |
1190 | { | |
1191 | uschar *message = string_sprintf("failed to expand " | |
1192 | "authenticated_sender: %s", expand_string_message); | |
895fbaf2 | 1193 | set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
fcc8e047 JH |
1194 | return TRUE; |
1195 | } | |
1196 | } | |
1197 | else if (new[0] != 0) local_authenticated_sender = new; | |
1198 | } | |
1199 | ||
1200 | /* Add the authenticated sender address if present */ | |
1201 | ||
1202 | if ((smtp_authenticated || ob->authenticated_sender_force) && | |
1203 | local_authenticated_sender != NULL) | |
1204 | { | |
1205 | string_format(buffer, bufsize, " AUTH=%s", | |
1206 | auth_xtextencode(local_authenticated_sender, | |
1207 | Ustrlen(local_authenticated_sender))); | |
1208 | client_authenticated_sender = string_copy(local_authenticated_sender); | |
1209 | } | |
1210 | else | |
1211 | *buffer= 0; | |
1212 | ||
1213 | return FALSE; | |
1214 | } | |
1215 | ||
1216 | ||
1217 | ||
c0635b6d | 1218 | #ifdef SUPPORT_DANE |
2d5fdd53 JH |
1219 | /* Lookup TLSA record for host/port. |
1220 | Return: OK success with dnssec; DANE mode | |
1221 | DEFER Do not use this host now, may retry later | |
1222 | FAIL_FORCED No TLSA record; DANE not usable | |
1223 | FAIL Do not use this connection | |
1224 | */ | |
1225 | ||
0e66b3b6 | 1226 | int |
4b0fe319 | 1227 | tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required) |
0e66b3b6 JH |
1228 | { |
1229 | /* move this out to host.c given the similarity to dns_lookup() ? */ | |
1230 | uschar buffer[300]; | |
55414b25 | 1231 | const uschar * fullname = buffer; |
58c30e47 JH |
1232 | int rc; |
1233 | BOOL sec; | |
0e66b3b6 JH |
1234 | |
1235 | /* TLSA lookup string */ | |
1236 | (void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name); | |
1237 | ||
58c30e47 JH |
1238 | rc = dns_lookup(dnsa, buffer, T_TLSA, &fullname); |
1239 | sec = dns_is_secure(dnsa); | |
1240 | DEBUG(D_transport) | |
1241 | debug_printf("TLSA lookup ret %d %sDNSSEC\n", rc, sec ? "" : "not "); | |
1242 | ||
1243 | switch (rc) | |
0e66b3b6 | 1244 | { |
2d5fdd53 JH |
1245 | case DNS_AGAIN: |
1246 | return DEFER; /* just defer this TLS'd conn */ | |
1247 | ||
899b8bbc JH |
1248 | case DNS_SUCCEED: |
1249 | if (sec) return OK; | |
1250 | log_write(0, LOG_MAIN, | |
1251 | "DANE error: TLSA lookup for %s not DNSSEC", host->name); | |
1252 | /*FALLTRHOUGH*/ | |
1253 | ||
ef3a1a30 JH |
1254 | case DNS_NODATA: /* no TLSA RR for this lookup */ |
1255 | case DNS_NOMATCH: /* no records at all for this lookup */ | |
6b524204 | 1256 | return dane_required ? FAIL : FAIL_FORCED; |
2d5fdd53 JH |
1257 | |
1258 | default: | |
1259 | case DNS_FAIL: | |
1260 | return dane_required ? FAIL : DEFER; | |
0e66b3b6 | 1261 | } |
0e66b3b6 JH |
1262 | } |
1263 | #endif | |
1264 | ||
1265 | ||
a39bd74d JB |
1266 | |
1267 | typedef struct smtp_compare_s | |
1268 | { | |
1269 | uschar *current_sender_address; | |
1270 | struct transport_instance *tblock; | |
1271 | } smtp_compare_t; | |
1272 | ||
d093f8e5 JH |
1273 | |
1274 | /* Create a unique string that identifies this message, it is based on | |
1275 | sender_address, helo_data and tls_certificate if enabled. | |
1276 | */ | |
a39bd74d JB |
1277 | |
1278 | static uschar * | |
1279 | smtp_local_identity(uschar * sender, struct transport_instance * tblock) | |
1280 | { | |
1281 | address_item * addr1; | |
1282 | uschar * if1 = US""; | |
1283 | uschar * helo1 = US""; | |
1284 | #ifdef SUPPORT_TLS | |
1285 | uschar * tlsc1 = US""; | |
1286 | #endif | |
1287 | uschar * save_sender_address = sender_address; | |
1288 | uschar * local_identity = NULL; | |
1289 | smtp_transport_options_block * ob = | |
1290 | (smtp_transport_options_block *)tblock->options_block; | |
1291 | ||
1292 | sender_address = sender; | |
1293 | ||
1294 | addr1 = deliver_make_addr (sender, TRUE); | |
1295 | deliver_set_expansions(addr1); | |
1296 | ||
1297 | if (ob->interface) | |
1298 | if1 = expand_string(ob->interface); | |
1299 | ||
1300 | if (ob->helo_data) | |
1301 | helo1 = expand_string(ob->helo_data); | |
1302 | ||
1303 | #ifdef SUPPORT_TLS | |
1304 | if (ob->tls_certificate) | |
1305 | tlsc1 = expand_string(ob->tls_certificate); | |
1306 | local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1); | |
1307 | #else | |
1308 | local_identity = string_sprintf ("%s^%s", if1, helo1); | |
1309 | #endif | |
1310 | ||
1311 | deliver_set_expansions(NULL); | |
1312 | sender_address = save_sender_address; | |
1313 | ||
1314 | return local_identity; | |
1315 | } | |
1316 | ||
1317 | ||
1318 | ||
1319 | /* This routine is a callback that is called from transport_check_waiting. | |
1320 | This function will evaluate the incoming message versus the previous | |
1321 | message. If the incoming message is using a different local identity then | |
1322 | we will veto this new message. */ | |
1323 | ||
1324 | static BOOL | |
1325 | smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare) | |
1326 | { | |
dadff1d4 HSHR |
1327 | uschar * message_local_identity, |
1328 | * current_local_identity, | |
1329 | * new_sender_address; | |
1330 | ||
1331 | current_local_identity = | |
a39bd74d | 1332 | smtp_local_identity(s_compare->current_sender_address, s_compare->tblock); |
a39bd74d | 1333 | |
dadff1d4 HSHR |
1334 | if (!(new_sender_address = deliver_get_sender_address(message_id))) |
1335 | return 0; | |
1336 | ||
1337 | message_local_identity = | |
1338 | smtp_local_identity(new_sender_address, s_compare->tblock); | |
a39bd74d JB |
1339 | |
1340 | return Ustrcmp(current_local_identity, message_local_identity) == 0; | |
1341 | } | |
1342 | ||
1343 | ||
1344 | ||
8ac90765 JH |
1345 | static unsigned |
1346 | ehlo_response(uschar * buf, unsigned checks) | |
9094b84b | 1347 | { |
e9166683 JH |
1348 | size_t bsize = Ustrlen(buf); |
1349 | ||
9094b84b | 1350 | #ifdef SUPPORT_TLS |
14de8063 | 1351 | if ( checks & OPTION_TLS |
ff5aac2b | 1352 | && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1353 | checks &= ~OPTION_TLS; |
8ac90765 JH |
1354 | |
1355 | # ifdef EXPERIMENTAL_REQUIRETLS | |
1356 | if ( checks & OPTION_REQUIRETLS | |
1357 | && pcre_exec(regex_REQUIRETLS, NULL, CS buf,bsize, 0, PCRE_EOPT, NULL,0) < 0) | |
1358 | checks &= ~OPTION_REQUIRETLS; | |
1359 | # endif | |
9094b84b JH |
1360 | #endif |
1361 | ||
14de8063 | 1362 | if ( checks & OPTION_IGNQ |
ff5aac2b JH |
1363 | && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0, |
1364 | PCRE_EOPT, NULL, 0) < 0) | |
14de8063 | 1365 | checks &= ~OPTION_IGNQ; |
9094b84b | 1366 | |
14de8063 | 1367 | if ( checks & OPTION_CHUNKING |
f98442df | 1368 | && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1369 | checks &= ~OPTION_CHUNKING; |
f98442df | 1370 | |
9094b84b | 1371 | #ifndef DISABLE_PRDR |
14de8063 | 1372 | if ( checks & OPTION_PRDR |
ff5aac2b | 1373 | && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1374 | checks &= ~OPTION_PRDR; |
9094b84b JH |
1375 | #endif |
1376 | ||
1377 | #ifdef SUPPORT_I18N | |
14de8063 | 1378 | if ( checks & OPTION_UTF8 |
ff5aac2b | 1379 | && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1380 | checks &= ~OPTION_UTF8; |
9094b84b JH |
1381 | #endif |
1382 | ||
14de8063 | 1383 | if ( checks & OPTION_DSN |
ff5aac2b | 1384 | && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1385 | checks &= ~OPTION_DSN; |
9094b84b | 1386 | |
14de8063 | 1387 | if ( checks & OPTION_PIPE |
ff5aac2b JH |
1388 | && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0, |
1389 | PCRE_EOPT, NULL, 0) < 0) | |
14de8063 | 1390 | checks &= ~OPTION_PIPE; |
9094b84b | 1391 | |
14de8063 | 1392 | if ( checks & OPTION_SIZE |
ff5aac2b | 1393 | && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1394 | checks &= ~OPTION_SIZE; |
9094b84b JH |
1395 | |
1396 | return checks; | |
1397 | } | |
1398 | ||
1399 | ||
6d5c916c JH |
1400 | |
1401 | /* Callback for emitting a BDAT data chunk header. | |
6d5c916c | 1402 | |
e027f545 JH |
1403 | If given a nonzero size, first flush any buffered SMTP commands |
1404 | then emit the command. | |
1405 | ||
d2aa036b JH |
1406 | Reap previous SMTP command responses if requested, and always reap |
1407 | the response from a previous BDAT command. | |
1408 | ||
1409 | Args: | |
1410 | tctx transport context | |
1411 | chunk_size value for SMTP BDAT command | |
1412 | flags | |
1413 | tc_chunk_last add LAST option to SMTP BDAT command | |
1414 | tc_reap_prev reap response to previous SMTP commands | |
6d5c916c JH |
1415 | |
1416 | Returns: OK or ERROR | |
1417 | */ | |
1418 | ||
1419 | static int | |
d2aa036b JH |
1420 | smtp_chunk_cmd_callback(transport_ctx * tctx, unsigned chunk_size, |
1421 | unsigned flags) | |
6d5c916c JH |
1422 | { |
1423 | smtp_transport_options_block * ob = | |
1424 | (smtp_transport_options_block *)(tctx->tblock->options_block); | |
e9166683 | 1425 | smtp_context * sx = tctx->smtp_context; |
e027f545 JH |
1426 | int cmd_count = 0; |
1427 | int prev_cmd_count; | |
6d5c916c | 1428 | |
4e910c01 JH |
1429 | /* Write SMTP chunk header command. If not reaping responses, note that |
1430 | there may be more writes (like, the chunk data) done soon. */ | |
6d5c916c | 1431 | |
e027f545 | 1432 | if (chunk_size > 0) |
87cb4a16 | 1433 | { |
4e910c01 JH |
1434 | if((cmd_count = smtp_write_command(&sx->outblock, |
1435 | flags & tc_reap_prev ? SCMD_FLUSH : SCMD_MORE, | |
1436 | "BDAT %u%s\r\n", chunk_size, flags & tc_chunk_last ? " LAST" : "") | |
e027f545 | 1437 | ) < 0) return ERROR; |
87cb4a16 JH |
1438 | if (flags & tc_chunk_last) |
1439 | data_command = string_copy(big_buffer); /* Save for later error message */ | |
1440 | } | |
e027f545 | 1441 | |
e9166683 | 1442 | prev_cmd_count = cmd_count += sx->cmd_count; |
6d5c916c | 1443 | |
e027f545 | 1444 | /* Reap responses for any previous, but not one we just emitted */ |
6d5c916c | 1445 | |
e027f545 JH |
1446 | if (chunk_size > 0) |
1447 | prev_cmd_count--; | |
e9166683 | 1448 | if (sx->pending_BDAT) |
e027f545 | 1449 | prev_cmd_count--; |
6d5c916c | 1450 | |
e027f545 | 1451 | if (flags & tc_reap_prev && prev_cmd_count > 0) |
6d5c916c | 1452 | { |
58fc5fb2 JH |
1453 | DEBUG(D_transport) debug_printf("look for %d responses" |
1454 | " for previous pipelined cmds\n", prev_cmd_count); | |
6d5c916c | 1455 | |
e9166683 | 1456 | switch(sync_responses(sx, prev_cmd_count, 0)) |
e027f545 JH |
1457 | { |
1458 | case 1: /* 2xx (only) => OK */ | |
e9166683 JH |
1459 | case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */ |
1460 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e027f545 JH |
1461 | case 0: break; /* No 2xx or 5xx, but no probs */ |
1462 | ||
1463 | case -1: /* Timeout on RCPT */ | |
1464 | default: return ERROR; /* I/O error, or any MAIL/DATA error */ | |
1465 | } | |
1466 | cmd_count = 1; | |
e9166683 | 1467 | if (!sx->pending_BDAT) |
e027f545 | 1468 | pipelining_active = FALSE; |
6d5c916c | 1469 | } |
e027f545 | 1470 | |
58fc5fb2 | 1471 | /* Reap response for an outstanding BDAT */ |
e027f545 | 1472 | |
e9166683 | 1473 | if (sx->pending_BDAT) |
e027f545 | 1474 | { |
58fc5fb2 JH |
1475 | DEBUG(D_transport) debug_printf("look for one response for BDAT\n"); |
1476 | ||
e9166683 | 1477 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
e027f545 JH |
1478 | ob->command_timeout)) |
1479 | { | |
e9166683 | 1480 | if (errno == 0 && sx->buffer[0] == '4') |
e027f545 JH |
1481 | { |
1482 | errno = ERRNO_DATA4XX; /*XXX does this actually get used? */ | |
36e55f49 | 1483 | sx->addrlist->more_errno |= |
e9166683 | 1484 | ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e027f545 JH |
1485 | } |
1486 | return ERROR; | |
1487 | } | |
1488 | cmd_count--; | |
e9166683 | 1489 | sx->pending_BDAT = FALSE; |
e027f545 JH |
1490 | pipelining_active = FALSE; |
1491 | } | |
1492 | else if (chunk_size > 0) | |
e9166683 | 1493 | sx->pending_BDAT = TRUE; |
e027f545 JH |
1494 | |
1495 | ||
e9166683 | 1496 | sx->cmd_count = cmd_count; |
e027f545 | 1497 | return OK; |
6d5c916c JH |
1498 | } |
1499 | ||
1500 | ||
1501 | ||
0756eb3c | 1502 | /************************************************* |
d093f8e5 | 1503 | * Make connection for given message * |
0756eb3c PH |
1504 | *************************************************/ |
1505 | ||
d093f8e5 JH |
1506 | /* |
1507 | Arguments: | |
1508 | ctx connection context | |
d093f8e5 JH |
1509 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for |
1510 | a second attempt after TLS initialization fails | |
d093f8e5 JH |
1511 | |
1512 | Returns: OK - the connection was made and the delivery attempted; | |
1513 | fd is set in the conn context, tls_out set up. | |
1514 | DEFER - the connection could not be made, or something failed | |
1515 | while setting up the SMTP session, or there was a | |
1516 | non-message-specific error, such as a timeout. | |
1517 | ERROR - helo_data or add_headers or authenticated_sender is | |
1518 | specified for this transport, and the string failed | |
1519 | to expand | |
1520 | */ | |
1521 | int | |
e9166683 | 1522 | smtp_setup_conn(smtp_context * sx, BOOL suppress_tls) |
d093f8e5 | 1523 | { |
c0635b6d | 1524 | #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE) |
d093f8e5 JH |
1525 | dns_answer tlsa_dnsa; |
1526 | #endif | |
1527 | BOOL pass_message = FALSE; | |
d093f8e5 | 1528 | uschar * message = NULL; |
d093f8e5 JH |
1529 | int yield = OK; |
1530 | int rc; | |
1531 | ||
02b41d71 | 1532 | sx->ob = (smtp_transport_options_block *) sx->tblock->options_block; |
d093f8e5 JH |
1533 | |
1534 | sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0; | |
1535 | sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0; | |
1536 | sx->ok = FALSE; | |
1537 | sx->send_rset = TRUE; | |
1538 | sx->send_quit = TRUE; | |
1539 | sx->setting_up = TRUE; | |
1540 | sx->esmtp = TRUE; | |
1541 | sx->esmtp_sent = FALSE; | |
59a286ef | 1542 | #ifdef SUPPORT_I18N |
d093f8e5 | 1543 | sx->utf8_needed = FALSE; |
59a286ef | 1544 | #endif |
d093f8e5 | 1545 | sx->dsn_all_lasthop = TRUE; |
c0635b6d | 1546 | #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE) |
d093f8e5 | 1547 | sx->dane = FALSE; |
8ac90765 JH |
1548 | sx->dane_required = |
1549 | verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK; | |
d093f8e5 JH |
1550 | #endif |
1551 | ||
1552 | if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999; | |
d093f8e5 | 1553 | sx->peer_offered = 0; |
14de8063 | 1554 | sx->avoid_option = 0; |
d093f8e5 | 1555 | sx->igquotstr = US""; |
02b41d71 | 1556 | if (!sx->helo_data) sx->helo_data = sx->ob->helo_data; |
d093f8e5 JH |
1557 | #ifdef EXPERIMENTAL_DSN_INFO |
1558 | sx->smtp_greeting = NULL; | |
1559 | sx->helo_response = NULL; | |
59a286ef JH |
1560 | #endif |
1561 | ||
0756eb3c | 1562 | smtp_command = US"initial connection"; |
d093f8e5 | 1563 | sx->buffer[0] = '\0'; |
0756eb3c PH |
1564 | |
1565 | /* Set up the buffer for reading SMTP response packets. */ | |
1566 | ||
d093f8e5 JH |
1567 | sx->inblock.buffer = sx->inbuffer; |
1568 | sx->inblock.buffersize = sizeof(sx->inbuffer); | |
1569 | sx->inblock.ptr = sx->inbuffer; | |
1570 | sx->inblock.ptrend = sx->inbuffer; | |
0756eb3c PH |
1571 | |
1572 | /* Set up the buffer for holding SMTP commands while pipelining */ | |
1573 | ||
d093f8e5 JH |
1574 | sx->outblock.buffer = sx->outbuffer; |
1575 | sx->outblock.buffersize = sizeof(sx->outbuffer); | |
1576 | sx->outblock.ptr = sx->outbuffer; | |
1577 | sx->outblock.cmd_count = 0; | |
1578 | sx->outblock.authenticating = FALSE; | |
0756eb3c | 1579 | |
6c512171 PH |
1580 | /* Reset the parameters of a TLS session. */ |
1581 | ||
817d9f57 JH |
1582 | tls_out.bits = 0; |
1583 | tls_out.cipher = NULL; /* the one we may use for this transport */ | |
9d1c15ef JH |
1584 | tls_out.ourcert = NULL; |
1585 | tls_out.peercert = NULL; | |
817d9f57 JH |
1586 | tls_out.peerdn = NULL; |
1587 | #if defined(SUPPORT_TLS) && !defined(USE_GNUTLS) | |
1588 | tls_out.sni = NULL; | |
5b456975 | 1589 | #endif |
018058b2 | 1590 | tls_out.ocsp = OCSP_NOT_REQ; |
6c512171 | 1591 | |
35aba663 JH |
1592 | /* Flip the legacy TLS-related variables over to the outbound set in case |
1593 | they're used in the context of the transport. Don't bother resetting | |
02b41d71 JH |
1594 | afterward (when being used by a transport) as we're in a subprocess. |
1595 | For verify, unflipped once the callout is dealt with */ | |
35aba663 JH |
1596 | |
1597 | tls_modify_variables(&tls_out); | |
1598 | ||
061b7ebd | 1599 | #ifndef SUPPORT_TLS |
d093f8e5 | 1600 | if (sx->smtps) |
061b7ebd | 1601 | { |
d093f8e5 | 1602 | set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available", |
895fbaf2 | 1603 | DEFER, FALSE); |
018058b2 | 1604 | return ERROR; |
061b7ebd PP |
1605 | } |
1606 | #endif | |
1607 | ||
0756eb3c PH |
1608 | /* Make a connection to the host if this isn't a continued delivery, and handle |
1609 | the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled | |
1610 | specially so they can be identified for retries. */ | |
1611 | ||
58c30e47 | 1612 | if (!continue_hostname) |
0756eb3c | 1613 | { |
e9166683 | 1614 | if (sx->verify) |
02b41d71 JH |
1615 | HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port); |
1616 | ||
58c30e47 | 1617 | /* Get the actual port the connection will use, into sx->host */ |
4311097e | 1618 | |
58c30e47 | 1619 | smtp_port_for_connect(sx->host, sx->port); |
0756eb3c | 1620 | |
c0635b6d | 1621 | #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE) |
58c30e47 | 1622 | /* Do TLSA lookup for DANE */ |
0e66b3b6 | 1623 | { |
0e66b3b6 JH |
1624 | tls_out.dane_verified = FALSE; |
1625 | tls_out.tlsa_usage = 0; | |
1626 | ||
d093f8e5 | 1627 | if (sx->host->dnssec == DS_YES) |
0e66b3b6 | 1628 | { |
d093f8e5 JH |
1629 | if( sx->dane_required |
1630 | || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK | |
0e66b3b6 | 1631 | ) |
d093f8e5 | 1632 | switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required)) |
4b0fe319 | 1633 | { |
58c30e47 JH |
1634 | case OK: sx->dane = TRUE; |
1635 | sx->ob->tls_tempfail_tryclear = FALSE; | |
1636 | break; | |
2d5fdd53 | 1637 | case FAIL_FORCED: break; |
d093f8e5 | 1638 | default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
2d5fdd53 JH |
1639 | string_sprintf("DANE error: tlsa lookup %s", |
1640 | rc == DEFER ? "DEFER" : "FAIL"), | |
1641 | rc, FALSE); | |
8d3dc239 | 1642 | # ifndef DISABLE_EVENT |
c4b57fdd JH |
1643 | (void) event_raise(sx->tblock->event_action, |
1644 | US"dane:fail", sx->dane_required | |
1645 | ? US"dane-required" : US"dnssec-invalid"); | |
8d3dc239 | 1646 | # endif |
2d5fdd53 | 1647 | return rc; |
4b0fe319 | 1648 | } |
0e66b3b6 | 1649 | } |
d093f8e5 | 1650 | else if (sx->dane_required) |
0e66b3b6 | 1651 | { |
d093f8e5 JH |
1652 | set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
1653 | string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name), | |
895fbaf2 | 1654 | FAIL, FALSE); |
8d3dc239 | 1655 | # ifndef DISABLE_EVENT |
c4b57fdd JH |
1656 | (void) event_raise(sx->tblock->event_action, |
1657 | US"dane:fail", US"dane-required"); | |
8d3dc239 | 1658 | # endif |
4b0fe319 | 1659 | return FAIL; |
0e66b3b6 | 1660 | } |
0e66b3b6 JH |
1661 | } |
1662 | #endif /*DANE*/ | |
1663 | ||
58c30e47 JH |
1664 | /* Make the TCP connection */ |
1665 | ||
74f1a423 | 1666 | sx->cctx.sock = |
58c30e47 JH |
1667 | smtp_connect(sx->host, sx->host_af, sx->interface, |
1668 | sx->ob->connect_timeout, sx->tblock); | |
74f1a423 JH |
1669 | sx->cctx.tls_ctx = NULL; |
1670 | sx->inblock.cctx = sx->outblock.cctx = &sx->cctx; | |
58c30e47 | 1671 | |
74f1a423 | 1672 | if (sx->cctx.sock < 0) |
58c30e47 JH |
1673 | { |
1674 | uschar * msg = NULL; | |
1675 | if (sx->verify) | |
1676 | { | |
1677 | msg = US strerror(errno); | |
1678 | HDEBUG(D_verify) debug_printf("connect: %s\n", msg); | |
1679 | } | |
1680 | set_errno_nohost(sx->addrlist, | |
1681 | errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno, | |
1682 | sx->verify ? string_sprintf("could not connect: %s", msg) | |
1683 | : NULL, | |
1684 | DEFER, FALSE); | |
1685 | sx->send_quit = FALSE; | |
1686 | return DEFER; | |
1687 | } | |
1688 | ||
41c7c167 PH |
1689 | /* Expand the greeting message while waiting for the initial response. (Makes |
1690 | sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is | |
1691 | delayed till here so that $sending_interface and $sending_port are set. */ | |
1692 | ||
02b41d71 JH |
1693 | if (sx->helo_data) |
1694 | if (!(sx->helo_data = expand_string(sx->helo_data))) | |
e9166683 | 1695 | if (sx->verify) |
02b41d71 JH |
1696 | log_write(0, LOG_MAIN|LOG_PANIC, |
1697 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1698 | sx->addrlist->address, expand_string_message); | |
1699 | ||
8c5d388a | 1700 | #ifdef SUPPORT_I18N |
d093f8e5 | 1701 | if (sx->helo_data) |
810d16ad | 1702 | { |
02b41d71 JH |
1703 | expand_string_message = NULL; |
1704 | if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data, | |
1705 | &expand_string_message)), | |
1706 | expand_string_message) | |
e9166683 | 1707 | if (sx->verify) |
02b41d71 JH |
1708 | log_write(0, LOG_MAIN|LOG_PANIC, |
1709 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1710 | sx->addrlist->address, expand_string_message); | |
1711 | else | |
1712 | sx->helo_data = NULL; | |
810d16ad JH |
1713 | } |
1714 | #endif | |
41c7c167 | 1715 | |
0756eb3c PH |
1716 | /* The first thing is to wait for an initial OK response. The dreaded "goto" |
1717 | is nevertheless a reasonably clean way of programming this kind of logic, | |
1718 | where you want to escape on any error. */ | |
1719 | ||
d093f8e5 | 1720 | if (!sx->smtps) |
061b7ebd | 1721 | { |
8d330698 JH |
1722 | BOOL good_response; |
1723 | ||
1724 | #ifdef TCP_QUICKACK | |
74f1a423 | 1725 | (void) setsockopt(sx->cctx.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off)); |
8d330698 | 1726 | #endif |
d093f8e5 JH |
1727 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1728 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1729 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1730 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
1731 | #endif |
1732 | if (!good_response) goto RESPONSE_FAILED; | |
0756eb3c | 1733 | |
0cbf2b82 | 1734 | #ifndef DISABLE_EVENT |
b30275b8 | 1735 | { |
805c9d53 | 1736 | uschar * s; |
d093f8e5 JH |
1737 | lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes" |
1738 | : sx->host->dnssec==DS_NO ? US"no" : NULL; | |
1739 | s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer); | |
b30275b8 | 1740 | if (s) |
a7538db1 | 1741 | { |
d093f8e5 | 1742 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, |
b30275b8 | 1743 | string_sprintf("deferred by smtp:connect event expansion: %s", s), |
895fbaf2 | 1744 | DEFER, FALSE); |
a7538db1 JH |
1745 | yield = DEFER; |
1746 | goto SEND_QUIT; | |
1747 | } | |
b30275b8 | 1748 | } |
a7538db1 JH |
1749 | #endif |
1750 | ||
061b7ebd PP |
1751 | /* Now check if the helo_data expansion went well, and sign off cleanly if |
1752 | it didn't. */ | |
41c7c167 | 1753 | |
d093f8e5 | 1754 | if (!sx->helo_data) |
061b7ebd | 1755 | { |
d093f8e5 | 1756 | message = string_sprintf("failed to expand helo_data: %s", |
061b7ebd | 1757 | expand_string_message); |
d093f8e5 | 1758 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
061b7ebd PP |
1759 | yield = DEFER; |
1760 | goto SEND_QUIT; | |
1761 | } | |
41c7c167 PH |
1762 | } |
1763 | ||
0756eb3c | 1764 | /** Debugging without sending a message |
d093f8e5 | 1765 | sx->addrlist->transport_return = DEFER; |
0756eb3c PH |
1766 | goto SEND_QUIT; |
1767 | **/ | |
1768 | ||
1769 | /* Errors that occur after this point follow an SMTP command, which is | |
1770 | left in big_buffer by smtp_write_command() for use in error messages. */ | |
1771 | ||
1772 | smtp_command = big_buffer; | |
1773 | ||
1774 | /* Tell the remote who we are... | |
1775 | ||
1776 | February 1998: A convention has evolved that ESMTP-speaking MTAs include the | |
1777 | string "ESMTP" in their greeting lines, so make Exim send EHLO if the | |
1778 | greeting is of this form. The assumption was that the far end supports it | |
1779 | properly... but experience shows that there are some that give 5xx responses, | |
1780 | even though the banner includes "ESMTP" (there's a bloody-minded one that | |
1781 | says "ESMTP not spoken here"). Cope with that case. | |
1782 | ||
1783 | September 2000: Time has passed, and it seems reasonable now to always send | |
1784 | EHLO at the start. It is also convenient to make the change while installing | |
1785 | the TLS stuff. | |
1786 | ||
1787 | July 2003: Joachim Wieland met a broken server that advertises "PIPELINING" | |
1788 | but times out after sending MAIL FROM, RCPT TO and DATA all together. There | |
1789 | would be no way to send out the mails, so there is now a host list | |
1790 | "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the | |
1791 | PIPELINING problem as well. Maybe it can also be useful to cure other | |
1792 | problems with broken servers. | |
1793 | ||
1794 | Exim originally sent "Helo" at this point and ran for nearly a year that way. | |
1795 | Then somebody tried it with a Microsoft mailer... It seems that all other | |
1796 | mailers use upper case for some reason (the RFC is quite clear about case | |
1797 | independence) so, for peace of mind, I gave in. */ | |
1798 | ||
d093f8e5 | 1799 | sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK; |
0756eb3c | 1800 | |
061b7ebd PP |
1801 | /* Alas; be careful, since this goto is not an error-out, so conceivably |
1802 | we might set data between here and the target which we assume to exist | |
1803 | and be usable. I can see this coming back to bite us. */ | |
a7538db1 | 1804 | #ifdef SUPPORT_TLS |
d093f8e5 | 1805 | if (sx->smtps) |
061b7ebd | 1806 | { |
14de8063 | 1807 | smtp_peer_options |= OPTION_TLS; |
061b7ebd | 1808 | suppress_tls = FALSE; |
d093f8e5 | 1809 | sx->ob->tls_tempfail_tryclear = FALSE; |
061b7ebd PP |
1810 | smtp_command = US"SSL-on-connect"; |
1811 | goto TLS_NEGOTIATE; | |
1812 | } | |
a7538db1 | 1813 | #endif |
061b7ebd | 1814 | |
d093f8e5 | 1815 | if (sx->esmtp) |
0756eb3c | 1816 | { |
4e910c01 | 1817 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n", |
d093f8e5 | 1818 | sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0) |
0756eb3c | 1819 | goto SEND_FAILED; |
d093f8e5 JH |
1820 | sx->esmtp_sent = TRUE; |
1821 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', | |
1822 | sx->ob->command_timeout)) | |
0756eb3c | 1823 | { |
d093f8e5 | 1824 | if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp) |
895fbaf2 JH |
1825 | { |
1826 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 1827 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
1828 | #endif |
1829 | goto RESPONSE_FAILED; | |
1830 | } | |
d093f8e5 | 1831 | sx->esmtp = FALSE; |
0756eb3c | 1832 | } |
895fbaf2 | 1833 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1834 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 | 1835 | #endif |
0756eb3c PH |
1836 | } |
1837 | else | |
0756eb3c PH |
1838 | DEBUG(D_transport) |
1839 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
0756eb3c | 1840 | |
d093f8e5 | 1841 | if (!sx->esmtp) |
0756eb3c | 1842 | { |
895fbaf2 | 1843 | BOOL good_response; |
d093f8e5 JH |
1844 | int n = sizeof(sx->buffer); |
1845 | uschar * rsp = sx->buffer; | |
a57ce043 | 1846 | |
d093f8e5 JH |
1847 | if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2) |
1848 | { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; } | |
895fbaf2 | 1849 | |
4e910c01 | 1850 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "HELO %s\r\n", sx->helo_data) < 0) |
0756eb3c | 1851 | goto SEND_FAILED; |
d093f8e5 JH |
1852 | good_response = smtp_read_response(&sx->inblock, rsp, n, |
1853 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1854 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1855 | sx->helo_response = string_copy(rsp); |
895fbaf2 | 1856 | #endif |
a57ce043 JH |
1857 | if (!good_response) |
1858 | { | |
1859 | /* Handle special logging for a closed connection after HELO | |
1860 | when had previously sent EHLO */ | |
1861 | ||
d093f8e5 | 1862 | if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET)) |
a57ce043 | 1863 | { |
de6273b4 JH |
1864 | errno = ERRNO_SMTPCLOSED; |
1865 | goto EHLOHELO_FAILED; | |
a57ce043 | 1866 | } |
e5ab0ba9 | 1867 | memmove(sx->buffer, rsp, Ustrlen(rsp)); |
a57ce043 JH |
1868 | goto RESPONSE_FAILED; |
1869 | } | |
0756eb3c PH |
1870 | } |
1871 | ||
14de8063 | 1872 | sx->avoid_option = sx->peer_offered = smtp_peer_options = 0; |
2d14f397 | 1873 | |
d093f8e5 | 1874 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 1875 | { |
e9166683 | 1876 | sx->peer_offered = ehlo_response(sx->buffer, |
14de8063 | 1877 | OPTION_TLS /* others checked later */ |
9094b84b | 1878 | ); |
f1513293 | 1879 | |
0756eb3c PH |
1880 | /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */ |
1881 | ||
a7538db1 | 1882 | #ifdef SUPPORT_TLS |
14de8063 | 1883 | smtp_peer_options |= sx->peer_offered & OPTION_TLS; |
7ade712c | 1884 | #endif |
2d14f397 | 1885 | } |
0756eb3c PH |
1886 | } |
1887 | ||
57cc2785 JH |
1888 | /* For continuing deliveries down the same channel, having re-exec'd the socket |
1889 | is the standard input; for a socket held open from verify it is recorded | |
1890 | in the cutthrough context block. Either way we don't need to redo EHLO here | |
1891 | (but may need to do so for TLS - see below). | |
1892 | Set up the pointer to where subsequent commands will be left, for | |
2d14f397 | 1893 | error messages. Note that smtp_peer_options will have been |
0756eb3c PH |
1894 | set from the command line if they were set in the process that passed the |
1895 | connection on. */ | |
1896 | ||
895fbaf2 | 1897 | /*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c |
4c04137d | 1898 | as the continue goes via transport_pass_socket() and doublefork and exec. |
895fbaf2 JH |
1899 | It does not wait. Unclear how we keep separate host's responses |
1900 | separate - we could match up by host ip+port as a bodge. */ | |
1901 | ||
0756eb3c PH |
1902 | else |
1903 | { | |
74f1a423 | 1904 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
57cc2785 | 1905 | { |
74f1a423 | 1906 | sx->cctx = cutthrough.cctx; |
57cc2785 JH |
1907 | sx->host->port = sx->port = cutthrough.host.port; |
1908 | } | |
1909 | else | |
1910 | { | |
74f1a423 JH |
1911 | sx->cctx.sock = 0; /* stdin */ |
1912 | sx->cctx.tls_ctx = NULL; | |
a843a57e | 1913 | smtp_port_for_connect(sx->host, sx->port); /* Record the port that was used */ |
57cc2785 | 1914 | } |
74f1a423 | 1915 | sx->inblock.cctx = sx->outblock.cctx = &sx->cctx; |
0756eb3c | 1916 | smtp_command = big_buffer; |
02b41d71 | 1917 | sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */ |
875512a3 | 1918 | |
57cc2785 JH |
1919 | /* For a continued connection with TLS being proxied for us, or a |
1920 | held-open verify connection with TLS, nothing more to do. */ | |
875512a3 | 1921 | |
57cc2785 | 1922 | if ( continue_proxy_cipher |
74f1a423 JH |
1923 | || (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only |
1924 | && cutthrough.is_tls) | |
57cc2785 | 1925 | ) |
875512a3 JH |
1926 | { |
1927 | sx->peer_offered = smtp_peer_options; | |
14de8063 | 1928 | pipelining_active = !!(smtp_peer_options & OPTION_PIPE); |
57cc2785 JH |
1929 | HDEBUG(D_transport) debug_printf("continued connection, %s TLS\n", |
1930 | continue_proxy_cipher ? "proxied" : "verify conn with"); | |
875512a3 JH |
1931 | return OK; |
1932 | } | |
1933 | HDEBUG(D_transport) debug_printf("continued connection, no TLS\n"); | |
0756eb3c PH |
1934 | } |
1935 | ||
1936 | /* If TLS is available on this connection, whether continued or not, attempt to | |
1937 | start up a TLS session, unless the host is in hosts_avoid_tls. If successful, | |
1938 | send another EHLO - the server may give a different answer in secure mode. We | |
1939 | use a separate buffer for reading the response to STARTTLS so that if it is | |
1940 | negative, the original EHLO data is available for subsequent analysis, should | |
1941 | the client not be required to use TLS. If the response is bad, copy the buffer | |
1942 | for error analysis. */ | |
1943 | ||
1944 | #ifdef SUPPORT_TLS | |
14de8063 | 1945 | if ( smtp_peer_options & OPTION_TLS |
5130845b | 1946 | && !suppress_tls |
02b41d71 | 1947 | && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK |
e9166683 | 1948 | && ( !sx->verify |
02b41d71 JH |
1949 | || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK |
1950 | ) ) | |
0756eb3c PH |
1951 | { |
1952 | uschar buffer2[4096]; | |
4e910c01 | 1953 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "STARTTLS\r\n") < 0) |
0756eb3c PH |
1954 | goto SEND_FAILED; |
1955 | ||
1956 | /* If there is an I/O error, transmission of this message is deferred. If | |
1957 | there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is | |
1958 | false, we also defer. However, if there is a temporary rejection of STARTTLS | |
1959 | and tls_tempfail_tryclear is true, or if there is an outright rejection of | |
1960 | STARTTLS, we carry on. This means we will try to send the message in clear, | |
1961 | unless the host is in hosts_require_tls (tested below). */ | |
1962 | ||
d093f8e5 JH |
1963 | if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2', |
1964 | sx->ob->command_timeout)) | |
0756eb3c | 1965 | { |
4b0fe319 JH |
1966 | if ( errno != 0 |
1967 | || buffer2[0] == 0 | |
d093f8e5 | 1968 | || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear) |
4b0fe319 | 1969 | ) |
0dda4340 | 1970 | { |
d093f8e5 | 1971 | Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer)); |
9e7e0f6a | 1972 | sx->buffer[sizeof(sx->buffer)-1] = '\0'; |
0756eb3c | 1973 | goto RESPONSE_FAILED; |
0dda4340 | 1974 | } |
0756eb3c PH |
1975 | } |
1976 | ||
1977 | /* STARTTLS accepted: try to negotiate a TLS session. */ | |
1978 | ||
1979 | else | |
061b7ebd | 1980 | TLS_NEGOTIATE: |
0756eb3c | 1981 | { |
d093f8e5 | 1982 | address_item * addr; |
cf0c6164 | 1983 | uschar * errstr; |
74f1a423 JH |
1984 | sx->cctx.tls_ctx = tls_client_start(sx->cctx.sock, sx->host, |
1985 | sx->addrlist, sx->tblock, | |
c0635b6d | 1986 | # ifdef SUPPORT_DANE |
cf0c6164 | 1987 | sx->dane ? &tlsa_dnsa : NULL, |
0e66b3b6 | 1988 | # endif |
74f1a423 | 1989 | &tls_out, &errstr); |
0756eb3c | 1990 | |
74f1a423 | 1991 | if (!sx->cctx.tls_ctx) |
0756eb3c | 1992 | { |
74f1a423 JH |
1993 | /* TLS negotiation failed; give an error. From outside, this function may |
1994 | be called again to try in clear on a new connection, if the options permit | |
1995 | it for this host. */ | |
1996 | ||
c0635b6d | 1997 | # ifdef SUPPORT_DANE |
c4b57fdd JH |
1998 | if (sx->dane) |
1999 | { | |
2000 | log_write(0, LOG_MAIN, | |
cf0c6164 JH |
2001 | "DANE attempt failed; TLS connection to %s [%s]: %s", |
2002 | sx->host->name, sx->host->address, errstr); | |
8d3dc239 | 2003 | # ifndef DISABLE_EVENT |
c4b57fdd JH |
2004 | (void) event_raise(sx->tblock->event_action, |
2005 | US"dane:fail", US"validation-failure"); /* could do with better detail */ | |
8d3dc239 | 2006 | # endif |
c4b57fdd | 2007 | } |
6ebd79ec JH |
2008 | # endif |
2009 | ||
de6273b4 | 2010 | errno = ERRNO_TLSFAILURE; |
cf0c6164 | 2011 | message = string_sprintf("TLS session: %s", errstr); |
d093f8e5 | 2012 | sx->send_quit = FALSE; |
0756eb3c PH |
2013 | goto TLS_FAILED; |
2014 | } | |
2015 | ||
2016 | /* TLS session is set up */ | |
2017 | ||
2d14f397 | 2018 | smtp_peer_options_wrap = smtp_peer_options; |
d093f8e5 | 2019 | for (addr = sx->addrlist; addr; addr = addr->next) |
5ca2a9a1 PH |
2020 | if (addr->transport_return == PENDING_DEFER) |
2021 | { | |
817d9f57 | 2022 | addr->cipher = tls_out.cipher; |
9d1c15ef JH |
2023 | addr->ourcert = tls_out.ourcert; |
2024 | addr->peercert = tls_out.peercert; | |
817d9f57 | 2025 | addr->peerdn = tls_out.peerdn; |
018058b2 | 2026 | addr->ocsp = tls_out.ocsp; |
5ca2a9a1 | 2027 | } |
0756eb3c PH |
2028 | } |
2029 | } | |
2030 | ||
061b7ebd PP |
2031 | /* if smtps, we'll have smtp_command set to something else; always safe to |
2032 | reset it here. */ | |
2033 | smtp_command = big_buffer; | |
2034 | ||
41c7c167 PH |
2035 | /* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If |
2036 | helo_data is null, we are dealing with a connection that was passed from | |
2037 | another process, and so we won't have expanded helo_data above. We have to | |
2038 | expand it here. $sending_ip_address and $sending_port are set up right at the | |
2039 | start of the Exim process (in exim.c). */ | |
0756eb3c | 2040 | |
74f1a423 | 2041 | if (tls_out.active.sock >= 0) |
0756eb3c | 2042 | { |
061b7ebd | 2043 | char *greeting_cmd; |
895fbaf2 JH |
2044 | BOOL good_response; |
2045 | ||
d093f8e5 | 2046 | if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data))) |
41c7c167 | 2047 | { |
d093f8e5 JH |
2048 | uschar *message = string_sprintf("failed to expand helo_data: %s", |
2049 | expand_string_message); | |
2050 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
2051 | yield = DEFER; | |
2052 | goto SEND_QUIT; | |
41c7c167 PH |
2053 | } |
2054 | ||
0d0e4455 | 2055 | /* For SMTPS we need to wait for the initial OK response. */ |
d093f8e5 | 2056 | if (sx->smtps) |
061b7ebd | 2057 | { |
d093f8e5 JH |
2058 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
2059 | '2', sx->ob->command_timeout); | |
895fbaf2 | 2060 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 2061 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
2062 | #endif |
2063 | if (!good_response) goto RESPONSE_FAILED; | |
0d0e4455 PP |
2064 | } |
2065 | ||
d093f8e5 | 2066 | if (sx->esmtp) |
0d0e4455 PP |
2067 | greeting_cmd = "EHLO"; |
2068 | else | |
2069 | { | |
2070 | greeting_cmd = "HELO"; | |
2071 | DEBUG(D_transport) | |
2072 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
061b7ebd PP |
2073 | } |
2074 | ||
4e910c01 | 2075 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n", |
d093f8e5 | 2076 | sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0) |
0756eb3c | 2077 | goto SEND_FAILED; |
d093f8e5 JH |
2078 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
2079 | '2', sx->ob->command_timeout); | |
895fbaf2 | 2080 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 2081 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
2082 | #endif |
2083 | if (!good_response) goto RESPONSE_FAILED; | |
2d14f397 | 2084 | smtp_peer_options = 0; |
0756eb3c PH |
2085 | } |
2086 | ||
2087 | /* If the host is required to use a secure channel, ensure that we | |
2088 | have one. */ | |
2089 | ||
d093f8e5 | 2090 | else if ( sx->smtps |
c0635b6d | 2091 | # ifdef SUPPORT_DANE |
d093f8e5 | 2092 | || sx->dane |
8ac90765 JH |
2093 | # endif |
2094 | # ifdef EXPERIMENTAL_REQUIRETLS | |
2095 | || tls_requiretls & REQUIRETLS_MSG | |
0e66b3b6 | 2096 | # endif |
d093f8e5 | 2097 | || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK |
7a31d643 | 2098 | ) |
0756eb3c | 2099 | { |
8ac90765 JH |
2100 | errno = |
2101 | # ifdef EXPERIMENTAL_REQUIRETLS | |
2102 | tls_requiretls & REQUIRETLS_MSG ? ERRNO_REQUIRETLS : | |
2103 | # endif | |
2104 | ERRNO_TLSREQUIRED; | |
c562fd30 | 2105 | message = string_sprintf("a TLS session is required, but %s", |
14de8063 | 2106 | smtp_peer_options & OPTION_TLS |
2d14f397 | 2107 | ? "an attempt to start TLS failed" : "the server did not offer TLS support"); |
8d3dc239 | 2108 | # if defined(SUPPORT_DANE) && !defined(DISABLE_EVENT) |
c4b57fdd JH |
2109 | if (sx->dane) |
2110 | (void) event_raise(sx->tblock->event_action, US"dane:fail", | |
2111 | smtp_peer_options & OPTION_TLS | |
2112 | ? US"validation-failure" /* could do with better detail */ | |
2113 | : US"starttls-not-supported"); | |
2114 | # endif | |
0756eb3c PH |
2115 | goto TLS_FAILED; |
2116 | } | |
0e66b3b6 | 2117 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
2118 | |
2119 | /* If TLS is active, we have just started it up and re-done the EHLO command, | |
2120 | so its response needs to be analyzed. If TLS is not active and this is a | |
2121 | continued session down a previously-used socket, we haven't just done EHLO, so | |
2122 | we skip this. */ | |
2123 | ||
2124 | if (continue_hostname == NULL | |
a7538db1 | 2125 | #ifdef SUPPORT_TLS |
74f1a423 | 2126 | || tls_out.active.sock >= 0 |
a7538db1 | 2127 | #endif |
0756eb3c PH |
2128 | ) |
2129 | { | |
d093f8e5 | 2130 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 2131 | { |
e9166683 | 2132 | sx->peer_offered = ehlo_response(sx->buffer, |
d093f8e5 | 2133 | 0 /* no TLS */ |
14de8063 JH |
2134 | | (sx->lmtp && sx->ob->lmtp_ignore_quota ? OPTION_IGNQ : 0) |
2135 | | OPTION_CHUNKING | |
2136 | | OPTION_PRDR | |
9094b84b | 2137 | #ifdef SUPPORT_I18N |
14de8063 | 2138 | | (sx->addrlist->prop.utf8_msg ? OPTION_UTF8 : 0) |
d093f8e5 JH |
2139 | /*XXX if we hand peercaps on to continued-conn processes, |
2140 | must not depend on this addr */ | |
9094b84b | 2141 | #endif |
14de8063 JH |
2142 | | OPTION_DSN |
2143 | | OPTION_PIPE | |
2144 | | (sx->ob->size_addition >= 0 ? OPTION_SIZE : 0) | |
8ac90765 JH |
2145 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) |
2146 | | (tls_requiretls & REQUIRETLS_MSG ? OPTION_REQUIRETLS : 0) | |
2147 | #endif | |
9094b84b JH |
2148 | ); |
2149 | ||
2d14f397 JH |
2150 | /* Set for IGNOREQUOTA if the response to LHLO specifies support and the |
2151 | lmtp_ignore_quota option was set. */ | |
f1513293 | 2152 | |
14de8063 | 2153 | sx->igquotstr = sx->peer_offered & OPTION_IGNQ ? US" IGNOREQUOTA" : US""; |
f1513293 | 2154 | |
2d14f397 JH |
2155 | /* If the response to EHLO specified support for the SIZE parameter, note |
2156 | this, provided size_addition is non-negative. */ | |
f1513293 | 2157 | |
14de8063 | 2158 | smtp_peer_options |= sx->peer_offered & OPTION_SIZE; |
0756eb3c | 2159 | |
2d14f397 JH |
2160 | /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched |
2161 | the current host, esmtp will be false, so PIPELINING can never be used. If | |
2162 | the current host matches hosts_avoid_pipelining, don't do it. */ | |
0756eb3c | 2163 | |
14de8063 | 2164 | if ( sx->peer_offered & OPTION_PIPE |
d093f8e5 | 2165 | && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK) |
14de8063 | 2166 | smtp_peer_options |= OPTION_PIPE; |
0756eb3c | 2167 | |
2d14f397 | 2168 | DEBUG(D_transport) debug_printf("%susing PIPELINING\n", |
14de8063 | 2169 | smtp_peer_options & OPTION_PIPE ? "" : "not "); |
0756eb3c | 2170 | |
14de8063 | 2171 | if ( sx->peer_offered & OPTION_CHUNKING |
d093f8e5 | 2172 | && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK) |
14de8063 | 2173 | sx->peer_offered &= ~OPTION_CHUNKING; |
f98442df | 2174 | |
14de8063 | 2175 | if (sx->peer_offered & OPTION_CHUNKING) |
2d14f397 | 2176 | {DEBUG(D_transport) debug_printf("CHUNKING usable\n");} |
0756eb3c | 2177 | |
8ccd00b1 | 2178 | #ifndef DISABLE_PRDR |
14de8063 | 2179 | if ( sx->peer_offered & OPTION_PRDR |
d093f8e5 | 2180 | && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK) |
14de8063 | 2181 | sx->peer_offered &= ~OPTION_PRDR; |
fd98a5c6 | 2182 | |
14de8063 | 2183 | if (sx->peer_offered & OPTION_PRDR) |
2d14f397 | 2184 | {DEBUG(D_transport) debug_printf("PRDR usable\n");} |
fd98a5c6 JH |
2185 | #endif |
2186 | ||
2d14f397 | 2187 | /* Note if the server supports DSN */ |
14de8063 | 2188 | smtp_peer_options |= sx->peer_offered & OPTION_DSN; |
2d14f397 | 2189 | DEBUG(D_transport) debug_printf("%susing DSN\n", |
14de8063 | 2190 | sx->peer_offered & OPTION_DSN ? "" : "not "); |
6c1c3d1d | 2191 | |
8ac90765 JH |
2192 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) |
2193 | if (sx->peer_offered & OPTION_REQUIRETLS) | |
2194 | { | |
2195 | smtp_peer_options |= OPTION_REQUIRETLS; | |
2196 | DEBUG(D_transport) debug_printf( | |
2197 | tls_requiretls & REQUIRETLS_MSG | |
2198 | ? "using REQUIRETLS\n" : "REQUIRETLS offered\n"); | |
2199 | } | |
2200 | #endif | |
2201 | ||
2d14f397 JH |
2202 | /* Note if the response to EHLO specifies support for the AUTH extension. |
2203 | If it has, check that this host is one we want to authenticate to, and do | |
2204 | the business. The host name and address must be available when the | |
2205 | authenticator's client driver is running. */ | |
0756eb3c | 2206 | |
d093f8e5 JH |
2207 | switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host, |
2208 | sx->ob, sx->esmtp, &sx->inblock, &sx->outblock)) | |
2d14f397 JH |
2209 | { |
2210 | default: goto SEND_QUIT; | |
2211 | case OK: break; | |
2212 | case FAIL_SEND: goto SEND_FAILED; | |
2213 | case FAIL: goto RESPONSE_FAILED; | |
2214 | } | |
0756eb3c PH |
2215 | } |
2216 | } | |
14de8063 | 2217 | pipelining_active = !!(smtp_peer_options & OPTION_PIPE); |
0756eb3c PH |
2218 | |
2219 | /* The setting up of the SMTP call is now complete. Any subsequent errors are | |
2220 | message-specific. */ | |
2221 | ||
d093f8e5 | 2222 | sx->setting_up = FALSE; |
0756eb3c | 2223 | |
8c5d388a | 2224 | #ifdef SUPPORT_I18N |
d093f8e5 | 2225 | if (sx->addrlist->prop.utf8_msg) |
9094b84b | 2226 | { |
71c15846 JH |
2227 | uschar * s; |
2228 | ||
2229 | /* If the transport sets a downconversion mode it overrides any set by ACL | |
2230 | for the message. */ | |
2231 | ||
2232 | if ((s = sx->ob->utf8_downconvert)) | |
2233 | { | |
2234 | if (!(s = expand_string(s))) | |
2235 | { | |
2236 | message = string_sprintf("failed to expand utf8_downconvert: %s", | |
2237 | expand_string_message); | |
2238 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
2239 | yield = DEFER; | |
2240 | goto SEND_QUIT; | |
2241 | } | |
2242 | switch (*s) | |
2243 | { | |
2244 | case '1': sx->addrlist->prop.utf8_downcvt = TRUE; | |
2245 | sx->addrlist->prop.utf8_downcvt_maybe = FALSE; | |
2246 | break; | |
2247 | case '0': sx->addrlist->prop.utf8_downcvt = FALSE; | |
2248 | sx->addrlist->prop.utf8_downcvt_maybe = FALSE; | |
2249 | break; | |
2250 | case '-': if (s[1] == '1') | |
2251 | { | |
2252 | sx->addrlist->prop.utf8_downcvt = FALSE; | |
2253 | sx->addrlist->prop.utf8_downcvt_maybe = TRUE; | |
2254 | } | |
2255 | break; | |
2256 | } | |
2257 | } | |
2258 | ||
d093f8e5 JH |
2259 | sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt |
2260 | && !sx->addrlist->prop.utf8_downcvt_maybe; | |
2261 | DEBUG(D_transport) if (!sx->utf8_needed) | |
59a286ef | 2262 | debug_printf("utf8: %s downconvert\n", |
d093f8e5 | 2263 | sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional"); |
9094b84b JH |
2264 | } |
2265 | ||
7ade712c | 2266 | /* If this is an international message we need the host to speak SMTPUTF8 */ |
14de8063 | 2267 | if (sx->utf8_needed && !(sx->peer_offered & OPTION_UTF8)) |
7ade712c JH |
2268 | { |
2269 | errno = ERRNO_UTF8_FWD; | |
2270 | goto RESPONSE_FAILED; | |
2271 | } | |
71c15846 | 2272 | #endif /*SUPPORT_I18N*/ |
7ade712c | 2273 | |
8ac90765 JH |
2274 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) |
2275 | /*XXX should tls_requiretls actually be per-addr? */ | |
2276 | ||
2277 | if ( tls_requiretls & REQUIRETLS_MSG | |
2278 | && !(sx->peer_offered & OPTION_REQUIRETLS) | |
2279 | ) | |
2280 | { | |
2281 | sx->setting_up = TRUE; | |
2282 | errno = ERRNO_REQUIRETLS; | |
2283 | message = US"REQUIRETLS support is required from the server" | |
2284 | " but it was not offered"; | |
2285 | DEBUG(D_transport) debug_printf("%s\n", message); | |
2286 | goto TLS_FAILED; | |
2287 | } | |
2288 | #endif | |
2289 | ||
d093f8e5 JH |
2290 | return OK; |
2291 | ||
2292 | ||
2293 | { | |
2294 | int code; | |
d093f8e5 JH |
2295 | |
2296 | RESPONSE_FAILED: | |
d093f8e5 | 2297 | message = NULL; |
de6273b4 | 2298 | sx->send_quit = check_response(sx->host, &errno, sx->addrlist->more_errno, |
d093f8e5 | 2299 | sx->buffer, &code, &message, &pass_message); |
8ac90765 | 2300 | yield = DEFER; |
d093f8e5 | 2301 | goto FAILED; |
d093f8e5 JH |
2302 | |
2303 | SEND_FAILED: | |
d093f8e5 JH |
2304 | code = '4'; |
2305 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
829dd842 | 2306 | sx->host->name, sx->host->address, strerror(errno)); |
d093f8e5 | 2307 | sx->send_quit = FALSE; |
8ac90765 | 2308 | yield = DEFER; |
d093f8e5 | 2309 | goto FAILED; |
d093f8e5 | 2310 | |
de6273b4 JH |
2311 | EHLOHELO_FAILED: |
2312 | code = '4'; | |
2313 | message = string_sprintf("Remote host closed connection in response to %s" | |
2314 | " (EHLO response was: %s)", smtp_command, sx->buffer); | |
2315 | sx->send_quit = FALSE; | |
8ac90765 | 2316 | yield = DEFER; |
de6273b4 JH |
2317 | goto FAILED; |
2318 | ||
e5ab0ba9 JH |
2319 | /* This label is jumped to directly when a TLS negotiation has failed, |
2320 | or was not done for a host for which it is required. Values will be set | |
2321 | in message and errno, and setting_up will always be true. Treat as | |
2322 | a temporary error. */ | |
2323 | ||
d093f8e5 JH |
2324 | #ifdef SUPPORT_TLS |
2325 | TLS_FAILED: | |
8ac90765 JH |
2326 | # ifdef EXPERIMENTAL_REQUIRETLS |
2327 | if (errno == ERRNO_REQUIRETLS) | |
2328 | code = '5', yield = FAIL; | |
2329 | /*XXX DSN will be labelled 500; prefer 530 5.7.4 */ | |
2330 | else | |
2331 | # endif | |
2332 | code = '4', yield = DEFER; | |
de6273b4 | 2333 | goto FAILED; |
d093f8e5 JH |
2334 | #endif |
2335 | ||
2336 | /* The failure happened while setting up the call; see if the failure was | |
2337 | a 5xx response (this will either be on connection, or following HELO - a 5xx | |
e69636bc JH |
2338 | after EHLO causes it to try HELO). If so, and there are no more hosts to try, |
2339 | fail all addresses, as this host is never going to accept them. For other | |
2340 | errors during setting up (timeouts or whatever), defer all addresses, and | |
2341 | yield DEFER, so that the host is not tried again for a while. | |
2342 | ||
2343 | XXX This peeking for another host feels like a layering violation. We want | |
2344 | to note the host as unusable, but down here we shouldn't know if this was | |
2345 | the last host to try for the addr(list). Perhaps the upper layer should be | |
2346 | the one to do set_errno() ? The problem is that currently the addr is where | |
2347 | errno etc. are stashed, but until we run out of hosts to try the errors are | |
2348 | host-specific. Maybe we should enhance the host_item definition? */ | |
d093f8e5 | 2349 | |
de6273b4 | 2350 | FAILED: |
d093f8e5 | 2351 | sx->ok = FALSE; /* For when reached by GOTO */ |
e69636bc JH |
2352 | set_errno(sx->addrlist, errno, message, |
2353 | sx->host->next | |
2354 | ? DEFER | |
2355 | : code == '5' | |
d093f8e5 | 2356 | #ifdef SUPPORT_I18N |
e69636bc | 2357 | || errno == ERRNO_UTF8_FWD |
d093f8e5 | 2358 | #endif |
e69636bc JH |
2359 | ? FAIL : DEFER, |
2360 | pass_message, sx->host | |
d093f8e5 JH |
2361 | #ifdef EXPERIMENTAL_DSN_INFO |
2362 | , sx->smtp_greeting, sx->helo_response | |
2363 | #endif | |
2364 | ); | |
2365 | } | |
2366 | ||
2367 | ||
2368 | SEND_QUIT: | |
2369 | ||
2370 | if (sx->send_quit) | |
4e910c01 | 2371 | (void)smtp_write_command(&sx->outblock, SCMD_FLUSH, "QUIT\r\n"); |
d093f8e5 | 2372 | |
d093f8e5 | 2373 | #ifdef SUPPORT_TLS |
74f1a423 JH |
2374 | if (sx->cctx.tls_ctx) |
2375 | { | |
2376 | tls_close(sx->cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); | |
2377 | sx->cctx.tls_ctx = NULL; | |
2378 | } | |
d093f8e5 JH |
2379 | #endif |
2380 | ||
2381 | /* Close the socket, and return the appropriate value, first setting | |
2382 | works because the NULL setting is passed back to the calling process, and | |
2383 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
b7d3afcf | 2384 | */ |
d093f8e5 | 2385 | |
e1d04f48 | 2386 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
d093f8e5 JH |
2387 | if (sx->send_quit) |
2388 | { | |
74f1a423 JH |
2389 | shutdown(sx->cctx.sock, SHUT_WR); |
2390 | if (fcntl(sx->cctx.sock, F_SETFL, O_NONBLOCK) == 0) | |
2391 | for (rc = 16; read(sx->cctx.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;) | |
d093f8e5 | 2392 | rc--; /* drain socket */ |
02b41d71 | 2393 | sx->send_quit = FALSE; |
d093f8e5 | 2394 | } |
74f1a423 JH |
2395 | (void)close(sx->cctx.sock); |
2396 | sx->cctx.sock = -1; | |
d093f8e5 JH |
2397 | |
2398 | #ifndef DISABLE_EVENT | |
2399 | (void) event_raise(sx->tblock->event_action, US"tcp:close", NULL); | |
2400 | #endif | |
2401 | ||
2402 | continue_transport = NULL; | |
2403 | continue_hostname = NULL; | |
2404 | return yield; | |
2405 | } | |
2406 | ||
2407 | ||
9be4572b JH |
2408 | |
2409 | ||
2410 | /* Create the string of options that will be appended to the MAIL FROM: | |
2411 | in the connection context buffer */ | |
2412 | ||
2413 | static int | |
2414 | build_mailcmd_options(smtp_context * sx, address_item * addrlist) | |
2415 | { | |
2416 | uschar * p = sx->buffer; | |
2417 | address_item * addr; | |
2418 | int address_count; | |
2419 | ||
2420 | *p = 0; | |
2421 | ||
14de8063 | 2422 | /* If we know the receiving MTA supports the SIZE qualification, and we know it, |
9be4572b JH |
2423 | send it, adding something to the message size to allow for imprecision |
2424 | and things that get added en route. Exim keeps the number of lines | |
2425 | in a message, so we can give an accurate value for the original message, but we | |
2426 | need some additional to handle added headers. (Double "." characters don't get | |
2427 | included in the count.) */ | |
2428 | ||
14de8063 JH |
2429 | if ( message_size > 0 |
2430 | && sx->peer_offered & OPTION_SIZE && !(sx->avoid_option & OPTION_SIZE)) | |
9be4572b | 2431 | { |
328c5688 JH |
2432 | /*XXX problem here under spool_files_wireformat? |
2433 | Or just forget about lines? Or inflate by a fixed proportion? */ | |
2434 | ||
9be4572b JH |
2435 | sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition); |
2436 | while (*p) p++; | |
2437 | } | |
2438 | ||
2439 | #ifndef DISABLE_PRDR | |
2440 | /* If it supports Per-Recipient Data Reponses, and we have omre than one recipient, | |
2441 | request that */ | |
2442 | ||
2443 | sx->prdr_active = FALSE; | |
14de8063 | 2444 | if (sx->peer_offered & OPTION_PRDR) |
9be4572b JH |
2445 | for (addr = addrlist; addr; addr = addr->next) |
2446 | if (addr->transport_return == PENDING_DEFER) | |
2447 | { | |
2448 | for (addr = addr->next; addr; addr = addr->next) | |
2449 | if (addr->transport_return == PENDING_DEFER) | |
2450 | { /* at least two recipients to send */ | |
2451 | sx->prdr_active = TRUE; | |
2452 | sprintf(CS p, " PRDR"); p += 5; | |
2453 | break; | |
2454 | } | |
2455 | break; | |
2456 | } | |
2457 | #endif | |
2458 | ||
2459 | #ifdef SUPPORT_I18N | |
2460 | /* If it supports internationalised messages, and this meesage need that, | |
2461 | request it */ | |
2462 | ||
14de8063 | 2463 | if ( sx->peer_offered & OPTION_UTF8 |
9be4572b JH |
2464 | && addrlist->prop.utf8_msg |
2465 | && !addrlist->prop.utf8_downcvt | |
2466 | ) | |
2467 | Ustrcpy(p, " SMTPUTF8"), p += 9; | |
2468 | #endif | |
2469 | ||
8ac90765 JH |
2470 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) |
2471 | if (tls_requiretls & REQUIRETLS_MSG) | |
2472 | Ustrcpy(p, " REQUIRETLS") , p += 11; | |
2473 | #endif | |
2474 | ||
9be4572b JH |
2475 | /* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */ |
2476 | for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0; | |
2477 | addr && address_count < sx->max_rcpt; | |
2478 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2479 | { | |
2480 | address_count++; | |
2481 | if (!(addr->dsn_flags & rf_dsnlasthop)) | |
2482 | { | |
2483 | sx->dsn_all_lasthop = FALSE; | |
2484 | break; | |
2485 | } | |
2486 | } | |
2487 | ||
2488 | /* Add any DSN flags to the mail command */ | |
2489 | ||
14de8063 | 2490 | if (sx->peer_offered & OPTION_DSN && !sx->dsn_all_lasthop) |
9be4572b JH |
2491 | { |
2492 | if (dsn_ret == dsn_ret_hdrs) | |
2493 | { Ustrcpy(p, " RET=HDRS"); p += 9; } | |
2494 | else if (dsn_ret == dsn_ret_full) | |
2495 | { Ustrcpy(p, " RET=FULL"); p += 9; } | |
2496 | ||
2497 | if (dsn_envid) | |
2498 | { | |
2499 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid); | |
2500 | while (*p) p++; | |
2501 | } | |
2502 | } | |
2503 | ||
2504 | /* If an authenticated_sender override has been specified for this transport | |
2505 | instance, expand it. If the expansion is forced to fail, and there was already | |
2506 | an authenticated_sender for this message, the original value will be used. | |
2507 | Other expansion failures are serious. An empty result is ignored, but there is | |
2508 | otherwise no check - this feature is expected to be used with LMTP and other | |
2509 | cases where non-standard addresses (e.g. without domains) might be required. */ | |
2510 | ||
2511 | if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob)) | |
2512 | return ERROR; | |
2513 | ||
2514 | return OK; | |
2515 | } | |
2516 | ||
2517 | ||
2518 | static void | |
2519 | build_rcptcmd_options(smtp_context * sx, const address_item * addr) | |
2520 | { | |
2521 | uschar * p = sx->buffer; | |
2522 | *p = 0; | |
2523 | ||
2524 | /* Add any DSN flags to the rcpt command */ | |
2525 | ||
14de8063 | 2526 | if (sx->peer_offered & OPTION_DSN && !(addr->dsn_flags & rf_dsnlasthop)) |
9be4572b JH |
2527 | { |
2528 | if (addr->dsn_flags & rf_dsnflags) | |
2529 | { | |
2530 | int i; | |
2531 | BOOL first = TRUE; | |
2532 | ||
2533 | Ustrcpy(p, " NOTIFY="); | |
2534 | while (*p) p++; | |
2535 | for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i]) | |
2536 | { | |
2537 | if (!first) *p++ = ','; | |
2538 | first = FALSE; | |
2539 | Ustrcpy(p, rf_names[i]); | |
2540 | while (*p) p++; | |
2541 | } | |
2542 | } | |
2543 | ||
2544 | if (addr->dsn_orcpt) | |
2545 | { | |
2546 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s", | |
2547 | addr->dsn_orcpt); | |
2548 | while (*p) p++; | |
2549 | } | |
2550 | } | |
2551 | } | |
2552 | ||
2553 | ||
d9c3c8ed JH |
2554 | |
2555 | /* | |
2556 | Return: | |
e9166683 JH |
2557 | 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL) |
2558 | -1 MAIL response error | |
2559 | -2 any non-MAIL read i/o error | |
2560 | -3 non-MAIL response timeout | |
2561 | -4 internal error; channel still usable | |
2562 | -5 transmit failed | |
d9c3c8ed JH |
2563 | */ |
2564 | ||
2565 | int | |
2566 | smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield) | |
2567 | { | |
2568 | address_item * addr; | |
2569 | int address_count; | |
2570 | int rc; | |
2571 | ||
2572 | if (build_mailcmd_options(sx, sx->first_addr) != OK) | |
2573 | { | |
2574 | *yield = ERROR; | |
e9166683 | 2575 | return -4; |
d9c3c8ed JH |
2576 | } |
2577 | ||
2578 | /* From here until we send the DATA command, we can make use of PIPELINING | |
2579 | if the server host supports it. The code has to be able to check the responses | |
2580 | at any point, for when the buffer fills up, so we write it totally generally. | |
2581 | When PIPELINING is off, each command written reports that it has flushed the | |
2582 | buffer. */ | |
2583 | ||
2584 | sx->pending_MAIL = TRUE; /* The block starts with MAIL */ | |
2585 | ||
2586 | { | |
2587 | uschar * s = sx->from_addr; | |
2588 | #ifdef SUPPORT_I18N | |
2589 | uschar * errstr = NULL; | |
2590 | ||
2591 | /* If we must downconvert, do the from-address here. Remember we had to | |
2592 | for the to-addresses (done below), and also (ugly) for re-doing when building | |
2593 | the delivery log line. */ | |
2594 | ||
2595 | if ( sx->addrlist->prop.utf8_msg | |
14de8063 | 2596 | && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & OPTION_UTF8)) |
d9c3c8ed JH |
2597 | ) |
2598 | { | |
2599 | if (s = string_address_utf8_to_alabel(s, &errstr), errstr) | |
2600 | { | |
2601 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE); | |
2602 | *yield = ERROR; | |
e9166683 | 2603 | return -4; |
d9c3c8ed JH |
2604 | } |
2605 | setflag(sx->addrlist, af_utf8_downcvt); | |
2606 | } | |
2607 | #endif | |
2608 | ||
4e910c01 | 2609 | rc = smtp_write_command(&sx->outblock, pipelining_active ? SCMD_BUFFER : SCMD_FLUSH, |
d9c3c8ed JH |
2610 | "MAIL FROM:<%s>%s\r\n", s, sx->buffer); |
2611 | } | |
2612 | ||
2613 | mail_command = string_copy(big_buffer); /* Save for later error message */ | |
2614 | ||
2615 | switch(rc) | |
2616 | { | |
2617 | case -1: /* Transmission error */ | |
e9166683 | 2618 | return -5; |
d9c3c8ed | 2619 | |
df5b41e3 | 2620 | case +1: /* Cmd was sent */ |
d9c3c8ed JH |
2621 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
2622 | sx->ob->command_timeout)) | |
2623 | { | |
2624 | if (errno == 0 && sx->buffer[0] == '4') | |
2625 | { | |
2626 | errno = ERRNO_MAIL4XX; | |
2627 | sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
2628 | } | |
2629 | return -1; | |
2630 | } | |
2631 | sx->pending_MAIL = FALSE; | |
2632 | break; | |
e9166683 JH |
2633 | |
2634 | /* otherwise zero: command queued for pipeline */ | |
d9c3c8ed JH |
2635 | } |
2636 | ||
2637 | /* Pass over all the relevant recipient addresses for this host, which are the | |
2638 | ones that have status PENDING_DEFER. If we are using PIPELINING, we can send | |
2639 | several before we have to read the responses for those seen so far. This | |
2640 | checking is done by a subroutine because it also needs to be done at the end. | |
2641 | Send only up to max_rcpt addresses at a time, leaving next_addr pointing to | |
2642 | the next one if not all are sent. | |
2643 | ||
2644 | In the MUA wrapper situation, we want to flush the PIPELINING buffer for the | |
2645 | last address because we want to abort if any recipients have any kind of | |
2646 | problem, temporary or permanent. We know that all recipient addresses will have | |
2647 | the PENDING_DEFER status, because only one attempt is ever made, and we know | |
e9166683 JH |
2648 | that max_rcpt will be large, so all addresses will be done at once. |
2649 | ||
2650 | For verify we flush the pipeline after any (the only) rcpt address. */ | |
d9c3c8ed JH |
2651 | |
2652 | for (addr = sx->first_addr, address_count = 0; | |
2653 | addr && address_count < sx->max_rcpt; | |
2654 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2655 | { | |
2656 | int count; | |
2657 | BOOL no_flush; | |
2658 | uschar * rcpt_addr; | |
2659 | ||
a2673768 | 2660 | if (tcp_out_fastopen && !tcp_out_fastopen_logged) |
1ccd5f67 JH |
2661 | { |
2662 | setflag(addr, af_tcp_fastopen_conn); | |
2663 | if (tcp_out_fastopen > 1) setflag(addr, af_tcp_fastopen); | |
2664 | } | |
a2673768 | 2665 | |
14de8063 | 2666 | addr->dsn_aware = sx->peer_offered & OPTION_DSN |
d9c3c8ed JH |
2667 | ? dsn_support_yes : dsn_support_no; |
2668 | ||
2669 | address_count++; | |
4c2471ca JH |
2670 | no_flush = pipelining_active && !sx->verify |
2671 | && (!mua_wrapper || addr->next && address_count < sx->max_rcpt); | |
d9c3c8ed JH |
2672 | |
2673 | build_rcptcmd_options(sx, addr); | |
2674 | ||
2675 | /* Now send the RCPT command, and process outstanding responses when | |
2676 | necessary. After a timeout on RCPT, we just end the function, leaving the | |
2677 | yield as OK, because this error can often mean that there is a problem with | |
2678 | just one address, so we don't want to delay the host. */ | |
2679 | ||
2680 | rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes); | |
2681 | ||
2682 | #ifdef SUPPORT_I18N | |
2683 | if ( testflag(sx->addrlist, af_utf8_downcvt) | |
2684 | && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL)) | |
2685 | ) | |
2686 | { | |
2687 | /*XXX could we use a per-address errstr here? Not fail the whole send? */ | |
2688 | errno = ERRNO_EXPANDFAIL; | |
e9166683 | 2689 | return -5; /*XXX too harsh? */ |
d9c3c8ed JH |
2690 | } |
2691 | #endif | |
2692 | ||
4e910c01 JH |
2693 | count = smtp_write_command(&sx->outblock, no_flush ? SCMD_BUFFER : SCMD_FLUSH, |
2694 | "RCPT TO:<%s>%s%s\r\n", rcpt_addr, sx->igquotstr, sx->buffer); | |
d9c3c8ed | 2695 | |
e9166683 | 2696 | if (count < 0) return -5; |
d9c3c8ed JH |
2697 | if (count > 0) |
2698 | { | |
df5b41e3 | 2699 | switch(sync_responses(sx, count, 0)) |
d9c3c8ed JH |
2700 | { |
2701 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ | |
2702 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e9166683 | 2703 | break; |
d9c3c8ed JH |
2704 | |
2705 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ | |
2706 | if (!sx->lmtp) /* can't tell about progress yet */ | |
2707 | sx->completed_addr = TRUE; | |
2708 | case 0: /* No 2xx or 5xx, but no probs */ | |
2709 | break; | |
2710 | ||
e9166683 JH |
2711 | case -1: return -3; /* Timeout on RCPT */ |
2712 | case -2: return -2; /* non-MAIL read i/o error */ | |
2713 | default: return -1; /* any MAIL error */ | |
d9c3c8ed JH |
2714 | } |
2715 | sx->pending_MAIL = FALSE; /* Dealt with MAIL */ | |
2716 | } | |
2717 | } /* Loop for next address */ | |
2718 | ||
a2673768 | 2719 | tcp_out_fastopen_logged = TRUE; |
d9c3c8ed JH |
2720 | sx->next_addr = addr; |
2721 | return 0; | |
2722 | } | |
2723 | ||
2724 | ||
875512a3 JH |
2725 | #ifdef SUPPORT_TLS |
2726 | /***************************************************** | |
2727 | * Proxy TLS connection for another transport process * | |
2728 | ******************************************************/ | |
2729 | /* | |
d097cc73 JH |
2730 | Close the unused end of the pipe, fork once more, then use the given buffer |
2731 | as a staging area, and select on both the given fd and the TLS'd client-fd for | |
2732 | data to read (per the coding in ip_recv() and fd_ready() this is legitimate). | |
2733 | Do blocking full-size writes, and reads under a timeout. Once both input | |
2734 | channels are closed, exit the process. | |
875512a3 JH |
2735 | |
2736 | Arguments: | |
74f1a423 | 2737 | ct_ctx tls context |
57cc2785 JH |
2738 | buf space to use for buffering |
2739 | bufsiz size of buffer | |
d097cc73 | 2740 | pfd pipe filedescriptor array; [0] is comms to proxied process |
875512a3 JH |
2741 | timeout per-read timeout, seconds |
2742 | */ | |
2743 | ||
57cc2785 | 2744 | void |
74f1a423 JH |
2745 | smtp_proxy_tls(void * ct_ctx, uschar * buf, size_t bsize, int * pfd, |
2746 | int timeout) | |
875512a3 | 2747 | { |
e47252f5 | 2748 | fd_set rfds, efds; |
74f1a423 | 2749 | int max_fd = MAX(pfd[0], tls_out.active.sock) + 1; |
875512a3 JH |
2750 | int rc, i, fd_bits, nbytes; |
2751 | ||
d097cc73 JH |
2752 | close(pfd[1]); |
2753 | if ((rc = fork())) | |
2754 | { | |
2755 | DEBUG(D_transport) debug_printf("proxy-proc final-pid %d\n", rc); | |
2756 | _exit(rc < 0 ? EXIT_FAILURE : EXIT_SUCCESS); | |
2757 | } | |
2758 | ||
626810b9 | 2759 | if (running_in_test_harness) millisleep(100); /* let parent debug out */ |
875512a3 | 2760 | set_process_info("proxying TLS connection for continued transport"); |
e47252f5 | 2761 | FD_ZERO(&rfds); |
74f1a423 | 2762 | FD_SET(tls_out.active.sock, &rfds); |
d097cc73 | 2763 | FD_SET(pfd[0], &rfds); |
875512a3 JH |
2764 | |
2765 | for (fd_bits = 3; fd_bits; ) | |
2766 | { | |
2767 | time_t time_left = timeout; | |
2768 | time_t time_start = time(NULL); | |
2769 | ||
2770 | /* wait for data */ | |
e47252f5 | 2771 | efds = rfds; |
875512a3 JH |
2772 | do |
2773 | { | |
2774 | struct timeval tv = { time_left, 0 }; | |
2775 | ||
e47252f5 JH |
2776 | rc = select(max_fd, |
2777 | (SELECT_ARG2_TYPE *)&rfds, NULL, (SELECT_ARG2_TYPE *)&efds, &tv); | |
875512a3 JH |
2778 | |
2779 | if (rc < 0 && errno == EINTR) | |
2780 | if ((time_left -= time(NULL) - time_start) > 0) continue; | |
2781 | ||
2782 | if (rc <= 0) | |
2783 | { | |
2784 | DEBUG(D_transport) if (rc == 0) debug_printf("%s: timed out\n", __FUNCTION__); | |
d097cc73 | 2785 | goto done; |
875512a3 | 2786 | } |
e47252f5 | 2787 | |
74f1a423 | 2788 | if (FD_ISSET(tls_out.active.sock, &efds) || FD_ISSET(pfd[0], &efds)) |
e47252f5 JH |
2789 | { |
2790 | DEBUG(D_transport) debug_printf("select: exceptional cond on %s fd\n", | |
d097cc73 JH |
2791 | FD_ISSET(pfd[0], &efds) ? "proxy" : "tls"); |
2792 | goto done; | |
e47252f5 | 2793 | } |
875512a3 | 2794 | } |
74f1a423 | 2795 | while (rc < 0 || !(FD_ISSET(tls_out.active.sock, &rfds) || FD_ISSET(pfd[0], &rfds))); |
875512a3 JH |
2796 | |
2797 | /* handle inbound data */ | |
74f1a423 JH |
2798 | if (FD_ISSET(tls_out.active.sock, &rfds)) |
2799 | if ((rc = tls_read(ct_ctx, buf, bsize)) <= 0) | |
875512a3 JH |
2800 | { |
2801 | fd_bits &= ~1; | |
74f1a423 | 2802 | FD_CLR(tls_out.active.sock, &rfds); |
d097cc73 | 2803 | shutdown(pfd[0], SHUT_WR); |
e47252f5 | 2804 | timeout = 5; |
875512a3 JH |
2805 | } |
2806 | else | |
2807 | { | |
2808 | for (nbytes = 0; rc - nbytes > 0; nbytes += i) | |
d097cc73 | 2809 | if ((i = write(pfd[0], buf + nbytes, rc - nbytes)) < 0) goto done; |
875512a3 JH |
2810 | } |
2811 | else if (fd_bits & 1) | |
74f1a423 | 2812 | FD_SET(tls_out.active.sock, &rfds); |
875512a3 JH |
2813 | |
2814 | /* handle outbound data */ | |
d097cc73 JH |
2815 | if (FD_ISSET(pfd[0], &rfds)) |
2816 | if ((rc = read(pfd[0], buf, bsize)) <= 0) | |
875512a3 | 2817 | { |
e47252f5 | 2818 | fd_bits = 0; |
74f1a423 | 2819 | tls_close(ct_ctx, TLS_SHUTDOWN_NOWAIT); |
c645dd29 | 2820 | ct_ctx = NULL; |
875512a3 JH |
2821 | } |
2822 | else | |
2823 | { | |
2824 | for (nbytes = 0; rc - nbytes > 0; nbytes += i) | |
74f1a423 | 2825 | if ((i = tls_write(ct_ctx, buf + nbytes, rc - nbytes, FALSE)) < 0) |
d097cc73 | 2826 | goto done; |
875512a3 JH |
2827 | } |
2828 | else if (fd_bits & 2) | |
d097cc73 | 2829 | FD_SET(pfd[0], &rfds); |
875512a3 | 2830 | } |
d097cc73 JH |
2831 | |
2832 | done: | |
2833 | if (running_in_test_harness) millisleep(100); /* let logging complete */ | |
2834 | exim_exit(0, US"TLS proxy"); | |
875512a3 JH |
2835 | } |
2836 | #endif | |
2837 | ||
2838 | ||
d093f8e5 JH |
2839 | /************************************************* |
2840 | * Deliver address list to given host * | |
2841 | *************************************************/ | |
2842 | ||
2843 | /* If continue_hostname is not null, we get here only when continuing to | |
2844 | deliver down an existing channel. The channel was passed as the standard | |
2845 | input. TLS is never active on a passed channel; the previous process always | |
2846 | closes it down before passing the connection on. | |
2847 | ||
2848 | Otherwise, we have to make a connection to the remote host, and do the | |
2849 | initial protocol exchange. | |
2850 | ||
2851 | When running as an MUA wrapper, if the sender or any recipient is rejected, | |
2852 | temporarily or permanently, we force failure for all recipients. | |
2853 | ||
2854 | Arguments: | |
2855 | addrlist chain of potential addresses to deliver; only those whose | |
2856 | transport_return field is set to PENDING_DEFER are currently | |
2857 | being processed; others should be skipped - they have either | |
2858 | been delivered to an earlier host or IP address, or been | |
2859 | failed by one of them. | |
2860 | host host to deliver to | |
2861 | host_af AF_INET or AF_INET6 | |
a843a57e JH |
2862 | defport default TCP/IP port to use if host does not specify, in host |
2863 | byte order | |
d093f8e5 JH |
2864 | interface interface to bind to, or NULL |
2865 | tblock transport instance block | |
2866 | message_defer set TRUE if yield is OK, but all addresses were deferred | |
2867 | because of a non-recipient, non-host failure, that is, a | |
2868 | 4xx response to MAIL FROM, DATA, or ".". This is a defer | |
2869 | that is specific to the message. | |
2870 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for | |
2871 | a second attempt after TLS initialization fails | |
2872 | ||
2873 | Returns: OK - the connection was made and the delivery attempted; | |
2874 | the result for each address is in its data block. | |
2875 | DEFER - the connection could not be made, or something failed | |
2876 | while setting up the SMTP session, or there was a | |
2877 | non-message-specific error, such as a timeout. | |
2878 | ERROR - a filter command is specified for this transport, | |
2879 | and there was a problem setting it up; OR helo_data | |
2880 | or add_headers or authenticated_sender is specified | |
2881 | for this transport, and the string failed to expand | |
2882 | */ | |
2883 | ||
2884 | static int | |
a843a57e | 2885 | smtp_deliver(address_item *addrlist, host_item *host, int host_af, int defport, |
d093f8e5 JH |
2886 | uschar *interface, transport_instance *tblock, |
2887 | BOOL *message_defer, BOOL suppress_tls) | |
2888 | { | |
2889 | address_item *addr; | |
d093f8e5 | 2890 | int yield = OK; |
d093f8e5 JH |
2891 | int save_errno; |
2892 | int rc; | |
32dfdf8b | 2893 | struct timeval start_delivery_time; |
d093f8e5 | 2894 | |
d093f8e5 JH |
2895 | BOOL pass_message = FALSE; |
2896 | uschar *message = NULL; | |
2897 | uschar new_message_id[MESSAGE_ID_LENGTH + 1]; | |
d093f8e5 JH |
2898 | |
2899 | smtp_context sx; | |
2900 | ||
32dfdf8b | 2901 | gettimeofday(&start_delivery_time, NULL); |
d093f8e5 | 2902 | suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */ |
02b41d71 | 2903 | *message_defer = FALSE; |
d093f8e5 JH |
2904 | |
2905 | sx.addrlist = addrlist; | |
2906 | sx.host = host; | |
2907 | sx.host_af = host_af, | |
a843a57e | 2908 | sx.port = defport; |
d093f8e5 | 2909 | sx.interface = interface; |
02b41d71 | 2910 | sx.helo_data = NULL; |
d093f8e5 | 2911 | sx.tblock = tblock; |
e9166683 | 2912 | sx.verify = FALSE; |
d093f8e5 | 2913 | |
9be4572b JH |
2914 | /* Get the channel set up ready for a message (MAIL FROM being the next |
2915 | SMTP command to send */ | |
2916 | ||
e9166683 | 2917 | if ((rc = smtp_setup_conn(&sx, suppress_tls)) != OK) |
d093f8e5 JH |
2918 | return rc; |
2919 | ||
0756eb3c PH |
2920 | /* If there is a filter command specified for this transport, we can now |
2921 | set it up. This cannot be done until the identify of the host is known. */ | |
2922 | ||
e9166683 | 2923 | if (tblock->filter_command) |
0756eb3c | 2924 | { |
9b989985 | 2925 | transport_filter_timeout = tblock->filter_timeout; |
0756eb3c PH |
2926 | |
2927 | /* On failure, copy the error to all addresses, abandon the SMTP call, and | |
2928 | yield ERROR. */ | |
2929 | ||
36d295f1 JH |
2930 | if (!transport_set_up_command(&transport_filter_argv, |
2931 | tblock->filter_command, TRUE, DEFER, addrlist, | |
2932 | string_sprintf("%.50s transport", tblock->name), NULL)) | |
0756eb3c | 2933 | { |
895fbaf2 JH |
2934 | set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER, |
2935 | FALSE); | |
0756eb3c PH |
2936 | yield = ERROR; |
2937 | goto SEND_QUIT; | |
2938 | } | |
48f1c853 JH |
2939 | |
2940 | if ( transport_filter_argv | |
2941 | && *transport_filter_argv | |
2942 | && **transport_filter_argv | |
14de8063 | 2943 | && sx.peer_offered & OPTION_CHUNKING |
48f1c853 JH |
2944 | ) |
2945 | { | |
14de8063 | 2946 | sx.peer_offered &= ~OPTION_CHUNKING; |
48f1c853 JH |
2947 | DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n"); |
2948 | } | |
0756eb3c PH |
2949 | } |
2950 | ||
36d295f1 | 2951 | sx.first_addr = addrlist; |
0756eb3c PH |
2952 | |
2953 | /* For messages that have more than the maximum number of envelope recipients, | |
2954 | we want to send several transactions down the same SMTP connection. (See | |
2955 | comments in deliver.c as to how this reconciles, heuristically, with | |
2956 | remote_max_parallel.) This optimization was added to Exim after the following | |
2957 | code was already working. The simplest way to put it in without disturbing the | |
2958 | code was to use a goto to jump back to this point when there is another | |
2959 | transaction to handle. */ | |
2960 | ||
2961 | SEND_MESSAGE: | |
d9c3c8ed | 2962 | sx.from_addr = return_path; |
36d295f1 | 2963 | sx.sync_addr = sx.first_addr; |
d093f8e5 JH |
2964 | sx.ok = FALSE; |
2965 | sx.send_rset = TRUE; | |
d9c3c8ed | 2966 | sx.completed_addr = FALSE; |
0756eb3c PH |
2967 | |
2968 | ||
57cc2785 JH |
2969 | /* If we are a continued-connection-after-verify the MAIL and RCPT |
2970 | commands were already sent; do not re-send but do mark the addrs as | |
2971 | having been accepted up to RCPT stage. A traditional cont-conn | |
2972 | always has a sequence number greater than one. */ | |
6b62e899 | 2973 | |
57cc2785 | 2974 | if (continue_hostname && continue_sequence == 1) |
0756eb3c | 2975 | { |
57cc2785 | 2976 | address_item * addr; |
0756eb3c | 2977 | |
57cc2785 | 2978 | sx.peer_offered = smtp_peer_options; |
d8b8dd15 | 2979 | sx.pending_MAIL = FALSE; |
57cc2785 JH |
2980 | sx.ok = TRUE; |
2981 | sx.next_addr = NULL; | |
0756eb3c | 2982 | |
57cc2785 JH |
2983 | for (addr = addrlist; addr; addr = addr->next) |
2984 | addr->transport_return = PENDING_OK; | |
2985 | } | |
2986 | else | |
0756eb3c | 2987 | { |
57cc2785 JH |
2988 | /* Initiate a message transfer. */ |
2989 | ||
2990 | switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield)) | |
2991 | { | |
2992 | case 0: break; | |
2993 | case -1: case -2: goto RESPONSE_FAILED; | |
2994 | case -3: goto END_OFF; | |
2995 | case -4: goto SEND_QUIT; | |
2996 | default: goto SEND_FAILED; | |
2997 | } | |
2998 | ||
2999 | /* If we are an MUA wrapper, abort if any RCPTs were rejected, either | |
3000 | permanently or temporarily. We should have flushed and synced after the last | |
3001 | RCPT. */ | |
3002 | ||
3003 | if (mua_wrapper) | |
3004 | { | |
4c2471ca JH |
3005 | address_item * a; |
3006 | unsigned cnt; | |
3007 | ||
3008 | for (a = sx.first_addr, cnt = 0; a && cnt < sx.max_rcpt; a = a->next, cnt++) | |
3009 | if (a->transport_return != PENDING_OK) | |
57cc2785 JH |
3010 | { |
3011 | /*XXX could we find a better errno than 0 here? */ | |
4c2471ca JH |
3012 | set_errno_nohost(addrlist, 0, a->message, FAIL, |
3013 | testflag(a, af_pass_message)); | |
57cc2785 JH |
3014 | sx.ok = FALSE; |
3015 | break; | |
3016 | } | |
3017 | } | |
0756eb3c PH |
3018 | } |
3019 | ||
3020 | /* If ok is TRUE, we know we have got at least one good recipient, and must now | |
3021 | send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still | |
3022 | have a good recipient buffered up if we are pipelining. We don't want to waste | |
3023 | time sending DATA needlessly, so we only send it if either ok is TRUE or if we | |
6d5c916c JH |
3024 | are pipelining. The responses are all handled by sync_responses(). |
3025 | If using CHUNKING, do not send a BDAT until we know how big a chunk we want | |
3026 | to send is. */ | |
0756eb3c | 3027 | |
14de8063 | 3028 | if ( !(sx.peer_offered & OPTION_CHUNKING) |
d093f8e5 | 3029 | && (sx.ok || (pipelining_active && !mua_wrapper))) |
0756eb3c | 3030 | { |
4e910c01 | 3031 | int count = smtp_write_command(&sx.outblock, SCMD_FLUSH, "DATA\r\n"); |
6d5c916c | 3032 | |
0756eb3c | 3033 | if (count < 0) goto SEND_FAILED; |
df5b41e3 | 3034 | switch(sync_responses(&sx, count, sx.ok ? +1 : -1)) |
0756eb3c | 3035 | { |
d093f8e5 | 3036 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 3037 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
0756eb3c PH |
3038 | break; |
3039 | ||
d093f8e5 | 3040 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 3041 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
0756eb3c PH |
3042 | case 0: break; /* No 2xx or 5xx, but no probs */ |
3043 | ||
3044 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
3045 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
3046 | } | |
0d9fa8c0 | 3047 | pipelining_active = FALSE; |
87cb4a16 | 3048 | data_command = string_copy(big_buffer); /* Save for later error message */ |
0756eb3c PH |
3049 | } |
3050 | ||
0756eb3c PH |
3051 | /* If there were no good recipients (but otherwise there have been no |
3052 | problems), just set ok TRUE, since we have handled address-specific errors | |
3053 | already. Otherwise, it's OK to send the message. Use the check/escape mechanism | |
3054 | for handling the SMTP dot-handling protocol, flagging to apply to headers as | |
3055 | well as body. Set the appropriate timeout value to be used for each chunk. | |
3056 | (Haven't been able to make it work using select() for writing yet.) */ | |
3057 | ||
14de8063 | 3058 | if (!(sx.peer_offered & OPTION_CHUNKING) && !sx.ok) |
6d5c916c JH |
3059 | { |
3060 | /* Save the first address of the next batch. */ | |
d9c3c8ed | 3061 | sx.first_addr = sx.next_addr; |
6d5c916c | 3062 | |
d093f8e5 | 3063 | sx.ok = TRUE; |
6d5c916c | 3064 | } |
ff5aac2b | 3065 | else |
0756eb3c | 3066 | { |
6b46ecc6 | 3067 | transport_ctx tctx = { |
74f1a423 | 3068 | {sx.cctx.sock}, /*XXX will this need TLS info? */ |
6b46ecc6 JH |
3069 | tblock, |
3070 | addrlist, | |
3071 | US".", US"..", /* Escaping strings */ | |
65de12cc | 3072 | topt_use_crlf | topt_escape_headers |
6b46ecc6 JH |
3073 | | (tblock->body_only ? topt_no_headers : 0) |
3074 | | (tblock->headers_only ? topt_no_body : 0) | |
3075 | | (tblock->return_path_add ? topt_add_return_path : 0) | |
3076 | | (tblock->delivery_date_add ? topt_add_delivery_date : 0) | |
3077 | | (tblock->envelope_to_add ? topt_add_envelope_to : 0) | |
3078 | }; | |
3079 | ||
6d5c916c JH |
3080 | /* If using CHUNKING we need a callback from the generic transport |
3081 | support to us, for the sending of BDAT smtp commands and the reaping | |
3082 | of responses. The callback needs a whole bunch of state so set up | |
3083 | a transport-context structure to be passed around. */ | |
3084 | ||
14de8063 | 3085 | if (sx.peer_offered & OPTION_CHUNKING) |
59932f7d | 3086 | { |
65de12cc | 3087 | tctx.check_string = tctx.escape_string = NULL; |
6d5c916c JH |
3088 | tctx.options |= topt_use_bdat; |
3089 | tctx.chunk_cb = smtp_chunk_cmd_callback; | |
e9166683 JH |
3090 | sx.pending_BDAT = FALSE; |
3091 | sx.good_RCPT = sx.ok; | |
3092 | sx.cmd_count = 0; | |
3093 | tctx.smtp_context = &sx; | |
59932f7d JH |
3094 | } |
3095 | else | |
65de12cc | 3096 | tctx.options |= topt_end_dot; |
59932f7d | 3097 | |
6d5c916c | 3098 | /* Save the first address of the next batch. */ |
d9c3c8ed | 3099 | sx.first_addr = sx.next_addr; |
6d5c916c | 3100 | |
e027f545 JH |
3101 | /* Responses from CHUNKING commands go in buffer. Otherwise, |
3102 | there has not been a response. */ | |
3103 | ||
d093f8e5 | 3104 | sx.buffer[0] = 0; |
e027f545 | 3105 | |
0756eb3c | 3106 | sigalrm_seen = FALSE; |
d093f8e5 | 3107 | transport_write_timeout = sx.ob->data_timeout; |
0756eb3c PH |
3108 | smtp_command = US"sending data block"; /* For error messages */ |
3109 | DEBUG(D_transport|D_v) | |
14de8063 | 3110 | if (sx.peer_offered & OPTION_CHUNKING) |
6d5c916c JH |
3111 | debug_printf(" will write message using CHUNKING\n"); |
3112 | else | |
3113 | debug_printf(" SMTP>> writing message and terminating \".\"\n"); | |
0756eb3c | 3114 | transport_count = 0; |
a7538db1 | 3115 | |
80a47a2c | 3116 | #ifndef DISABLE_DKIM |
617d3932 JH |
3117 | dkim_exim_sign_init(); |
3118 | # ifdef EXPERIMENTAL_ARC | |
3119 | { | |
3120 | uschar * s = sx.ob->arc_sign; | |
3121 | if (s) | |
3122 | { | |
587d831d | 3123 | if (!(sx.ob->dkim.arc_signspec = s = expand_string(s))) |
617d3932 | 3124 | { |
587d831d JH |
3125 | if (!expand_string_forcedfail) |
3126 | { | |
3127 | message = US"failed to expand arc_sign"; | |
3128 | sx.ok = FALSE; | |
3129 | goto SEND_FAILED; | |
3130 | } | |
3131 | } | |
3132 | else if (*s) | |
3133 | { | |
3134 | /* Ask dkim code to hash the body for ARC */ | |
3135 | (void) arc_ams_setup_sign_bodyhash(); | |
3136 | sx.ob->dkim.force_bodyhash = TRUE; | |
617d3932 | 3137 | } |
617d3932 JH |
3138 | } |
3139 | } | |
3140 | # endif | |
42055a33 | 3141 | sx.ok = dkim_transport_write_message(&tctx, &sx.ob->dkim, CUSS &message); |
4cd12fe9 | 3142 | #else |
42055a33 | 3143 | sx.ok = transport_write_message(&tctx, 0); |
4cd12fe9 | 3144 | #endif |
0756eb3c PH |
3145 | |
3146 | /* transport_write_message() uses write() because it is called from other | |
3147 | places to write to non-sockets. This means that under some OS (e.g. Solaris) | |
3148 | it can exit with "Broken pipe" as its error. This really means that the | |
3149 | socket got closed at the far end. */ | |
3150 | ||
3151 | transport_write_timeout = 0; /* for subsequent transports */ | |
3152 | ||
3153 | /* Failure can either be some kind of I/O disaster (including timeout), | |
e027f545 JH |
3154 | or the failure of a transport filter or the expansion of added headers. |
3155 | Or, when CHUNKING, it can be a protocol-detected failure. */ | |
0756eb3c | 3156 | |
d093f8e5 | 3157 | if (!sx.ok) |
b9df1829 JH |
3158 | if (message) goto SEND_FAILED; |
3159 | else goto RESPONSE_FAILED; | |
0756eb3c PH |
3160 | |
3161 | /* We used to send the terminating "." explicitly here, but because of | |
3162 | buffering effects at both ends of TCP/IP connections, you don't gain | |
3163 | anything by keeping it separate, so it might as well go in the final | |
3164 | data buffer for efficiency. This is now done by setting the topt_end_dot | |
3165 | flag above. */ | |
3166 | ||
3167 | smtp_command = US"end of data"; | |
3168 | ||
14de8063 | 3169 | if (sx.peer_offered & OPTION_CHUNKING && sx.cmd_count > 1) |
6d5c916c JH |
3170 | { |
3171 | /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */ | |
e9166683 | 3172 | switch(sync_responses(&sx, sx.cmd_count-1, 0)) |
6d5c916c | 3173 | { |
d093f8e5 | 3174 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 3175 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
6d5c916c JH |
3176 | break; |
3177 | ||
d093f8e5 | 3178 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 3179 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
6d5c916c JH |
3180 | case 0: break; /* No 2xx or 5xx, but no probs */ |
3181 | ||
3182 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
3183 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
3184 | } | |
3185 | } | |
3186 | ||
8ccd00b1 | 3187 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
3188 | /* For PRDR we optionally get a partial-responses warning |
3189 | * followed by the individual responses, before going on with | |
3190 | * the overall response. If we don't get the warning then deal | |
3191 | * with per non-PRDR. */ | |
d093f8e5 | 3192 | if(sx.prdr_active) |
fd98a5c6 | 3193 | { |
d093f8e5 JH |
3194 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3', |
3195 | sx.ob->final_timeout); | |
3196 | if (!sx.ok && errno == 0) switch(sx.buffer[0]) | |
e027f545 | 3197 | { |
d093f8e5 JH |
3198 | case '2': sx.prdr_active = FALSE; |
3199 | sx.ok = TRUE; | |
e027f545 JH |
3200 | break; |
3201 | case '4': errno = ERRNO_DATA4XX; | |
3202 | addrlist->more_errno |= | |
d093f8e5 | 3203 | ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e027f545 JH |
3204 | break; |
3205 | } | |
fd98a5c6 JH |
3206 | } |
3207 | else | |
3208 | #endif | |
3209 | ||
3210 | /* For non-PRDR SMTP, we now read a single response that applies to the | |
3211 | whole message. If it is OK, then all the addresses have been delivered. */ | |
0756eb3c | 3212 | |
d093f8e5 | 3213 | if (!sx.lmtp) |
e97957bc | 3214 | { |
d093f8e5 JH |
3215 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
3216 | sx.ob->final_timeout); | |
3217 | if (!sx.ok && errno == 0 && sx.buffer[0] == '4') | |
e97957bc PH |
3218 | { |
3219 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 3220 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e97957bc PH |
3221 | } |
3222 | } | |
0756eb3c PH |
3223 | |
3224 | /* For LMTP, we get back a response for every RCPT command that we sent; | |
3225 | some may be accepted and some rejected. For those that get a response, their | |
3226 | status is fixed; any that are accepted have been handed over, even if later | |
3227 | responses crash - at least, that's how I read RFC 2033. | |
3228 | ||
3229 | If all went well, mark the recipient addresses as completed, record which | |
3230 | host/IPaddress they were delivered to, and cut out RSET when sending another | |
3231 | message down the same channel. Write the completed addresses to the journal | |
3232 | now so that they are recorded in case there is a crash of hardware or | |
3233 | software before the spool gets updated. Also record the final SMTP | |
3234 | confirmation if needed (for SMTP only). */ | |
3235 | ||
d093f8e5 | 3236 | if (sx.ok) |
0756eb3c PH |
3237 | { |
3238 | int flag = '='; | |
32dfdf8b | 3239 | struct timeval delivery_time; |
0756eb3c | 3240 | int len; |
32dfdf8b | 3241 | uschar * conf = NULL; |
0d9fa8c0 | 3242 | |
32dfdf8b | 3243 | timesince(&delivery_time, &start_delivery_time); |
d093f8e5 | 3244 | sx.send_rset = FALSE; |
0d9fa8c0 | 3245 | pipelining_active = FALSE; |
0756eb3c | 3246 | |
0756eb3c PH |
3247 | /* Set up confirmation if needed - applies only to SMTP */ |
3248 | ||
d68218c7 | 3249 | if ( |
0cbf2b82 | 3250 | #ifdef DISABLE_EVENT |
6c6d6e48 | 3251 | LOGGING(smtp_confirmation) && |
a7538db1 | 3252 | #endif |
d093f8e5 | 3253 | !sx.lmtp |
d68218c7 | 3254 | ) |
0756eb3c | 3255 | { |
d093f8e5 | 3256 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 3257 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
5903c6ff | 3258 | conf = (s == sx.buffer)? US string_copy(s) : US s; |
0756eb3c PH |
3259 | } |
3260 | ||
fd98a5c6 | 3261 | /* Process all transported addresses - for LMTP or PRDR, read a status for |
0756eb3c PH |
3262 | each one. */ |
3263 | ||
d9c3c8ed | 3264 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
0756eb3c PH |
3265 | { |
3266 | if (addr->transport_return != PENDING_OK) continue; | |
3267 | ||
3268 | /* LMTP - if the response fails badly (e.g. timeout), use it for all the | |
3269 | remaining addresses. Otherwise, it's a return code for just the one | |
75def545 PH |
3270 | address. For temporary errors, add a retry item for the address so that |
3271 | it doesn't get tried again too soon. */ | |
0756eb3c | 3272 | |
8ccd00b1 | 3273 | #ifndef DISABLE_PRDR |
d093f8e5 | 3274 | if (sx.lmtp || sx.prdr_active) |
fd98a5c6 | 3275 | #else |
d093f8e5 | 3276 | if (sx.lmtp) |
fd98a5c6 | 3277 | #endif |
0756eb3c | 3278 | { |
d093f8e5 JH |
3279 | if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
3280 | sx.ob->final_timeout)) | |
0756eb3c | 3281 | { |
d093f8e5 | 3282 | if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED; |
fd98a5c6 | 3283 | addr->message = string_sprintf( |
8ccd00b1 | 3284 | #ifndef DISABLE_PRDR |
d093f8e5 | 3285 | "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP", |
fd98a5c6 JH |
3286 | #else |
3287 | "LMTP error after %s: %s", | |
3288 | #endif | |
d093f8e5 | 3289 | data_command, string_printing(sx.buffer)); |
75def545 | 3290 | setflag(addr, af_pass_message); /* Allow message to go to user */ |
d093f8e5 | 3291 | if (sx.buffer[0] == '5') |
75def545 PH |
3292 | addr->transport_return = FAIL; |
3293 | else | |
3294 | { | |
e97957bc | 3295 | errno = ERRNO_DATA4XX; |
d093f8e5 | 3296 | addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
75def545 | 3297 | addr->transport_return = DEFER; |
8ccd00b1 | 3298 | #ifndef DISABLE_PRDR |
d093f8e5 | 3299 | if (!sx.prdr_active) |
fd98a5c6 JH |
3300 | #endif |
3301 | retry_add_item(addr, addr->address_retry_key, 0); | |
75def545 | 3302 | } |
0756eb3c PH |
3303 | continue; |
3304 | } | |
d9c3c8ed | 3305 | sx.completed_addr = TRUE; /* NOW we can set this flag */ |
6c6d6e48 | 3306 | if (LOGGING(smtp_confirmation)) |
c0ea85ab | 3307 | { |
d093f8e5 | 3308 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 3309 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
d093f8e5 | 3310 | conf = (s == sx.buffer) ? US string_copy(s) : US s; |
c0ea85ab | 3311 | } |
0756eb3c PH |
3312 | } |
3313 | ||
3314 | /* SMTP, or success return from LMTP for this address. Pass back the | |
2d280592 | 3315 | actual host that was used. */ |
0756eb3c PH |
3316 | |
3317 | addr->transport_return = OK; | |
32dfdf8b JH |
3318 | addr->more_errno = delivery_time.tv_sec; |
3319 | addr->delivery_usec = delivery_time.tv_usec; | |
d427a7f9 | 3320 | addr->host_used = host; |
0756eb3c PH |
3321 | addr->special_action = flag; |
3322 | addr->message = conf; | |
8ccd00b1 | 3323 | #ifndef DISABLE_PRDR |
7eb0e5d2 | 3324 | if (sx.prdr_active) setflag(addr, af_prdr_used); |
fd98a5c6 | 3325 | #endif |
7eb0e5d2 | 3326 | if (sx.peer_offered & OPTION_CHUNKING) setflag(addr, af_chunking_used); |
0756eb3c PH |
3327 | flag = '-'; |
3328 | ||
8ccd00b1 | 3329 | #ifndef DISABLE_PRDR |
d093f8e5 | 3330 | if (!sx.prdr_active) |
fd98a5c6 JH |
3331 | #endif |
3332 | { | |
3333 | /* Update the journal. For homonymic addresses, use the base address plus | |
3334 | the transport name. See lots of comments in deliver.c about the reasons | |
3335 | for the complications when homonyms are involved. Just carry on after | |
3336 | write error, as it may prove possible to update the spool file later. */ | |
4d8d62b9 | 3337 | |
fd98a5c6 | 3338 | if (testflag(addr, af_homonym)) |
d093f8e5 | 3339 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); |
fd98a5c6 | 3340 | else |
d093f8e5 | 3341 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); |
4d8d62b9 | 3342 | |
5bfe3b35 | 3343 | DEBUG(D_deliver) debug_printf("S:journalling %s\n", sx.buffer); |
d093f8e5 JH |
3344 | len = Ustrlen(CS sx.buffer); |
3345 | if (write(journal_fd, sx.buffer, len) != len) | |
fd98a5c6 | 3346 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " |
d093f8e5 | 3347 | "%s: %s", sx.buffer, strerror(errno)); |
fd98a5c6 | 3348 | } |
0756eb3c PH |
3349 | } |
3350 | ||
8ccd00b1 | 3351 | #ifndef DISABLE_PRDR |
d093f8e5 | 3352 | if (sx.prdr_active) |
fd98a5c6 | 3353 | { |
2556b3c6 SA |
3354 | const uschar * overall_message; |
3355 | ||
fd98a5c6 JH |
3356 | /* PRDR - get the final, overall response. For any non-success |
3357 | upgrade all the address statuses. */ | |
2556b3c6 | 3358 | |
d093f8e5 JH |
3359 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
3360 | sx.ob->final_timeout); | |
3361 | if (!sx.ok) | |
fd98a5c6 | 3362 | { |
d093f8e5 | 3363 | if(errno == 0 && sx.buffer[0] == '4') |
fd98a5c6 JH |
3364 | { |
3365 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 3366 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
fd98a5c6 | 3367 | } |
d9c3c8ed | 3368 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
d093f8e5 | 3369 | if (sx.buffer[0] == '5' || addr->transport_return == OK) |
fd98a5c6 JH |
3370 | addr->transport_return = PENDING_OK; /* allow set_errno action */ |
3371 | goto RESPONSE_FAILED; | |
3372 | } | |
3373 | ||
2556b3c6 SA |
3374 | /* Append the overall response to the individual PRDR response for logging |
3375 | and update the journal, or setup retry. */ | |
3376 | ||
3377 | overall_message = string_printing(sx.buffer); | |
3378 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) | |
3379 | if (addr->transport_return == OK) | |
3380 | addr->message = string_sprintf("%s\\n%s", addr->message, overall_message); | |
3381 | ||
d9c3c8ed | 3382 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
fd98a5c6 | 3383 | if (addr->transport_return == OK) |
9be4572b JH |
3384 | { |
3385 | if (testflag(addr, af_homonym)) | |
3386 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); | |
3387 | else | |
3388 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); | |
3389 | ||
3390 | DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer); | |
3391 | len = Ustrlen(CS sx.buffer); | |
3392 | if (write(journal_fd, sx.buffer, len) != len) | |
3393 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " | |
3394 | "%s: %s", sx.buffer, strerror(errno)); | |
3395 | } | |
3396 | else if (addr->transport_return == DEFER) | |
3397 | retry_add_item(addr, addr->address_retry_key, -2); | |
fd98a5c6 JH |
3398 | } |
3399 | #endif | |
3400 | ||
0756eb3c PH |
3401 | /* Ensure the journal file is pushed out to disk. */ |
3402 | ||
54fc8428 | 3403 | if (EXIMfsync(journal_fd) < 0) |
0756eb3c PH |
3404 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", |
3405 | strerror(errno)); | |
3406 | } | |
3407 | } | |
3408 | ||
3409 | ||
3410 | /* Handle general (not specific to one address) failures here. The value of ok | |
3411 | is used to skip over this code on the falling through case. A timeout causes a | |
3412 | deferral. Other errors may defer or fail according to the response code, and | |
3413 | may set up a special errno value, e.g. after connection chopped, which is | |
3414 | assumed if errno == 0 and there is no text in the buffer. If control reaches | |
3415 | here during the setting up phase (i.e. before MAIL FROM) then always defer, as | |
3416 | the problem is not related to this specific message. */ | |
3417 | ||
d093f8e5 | 3418 | if (!sx.ok) |
0756eb3c | 3419 | { |
895fbaf2 JH |
3420 | int code, set_rc; |
3421 | uschar * set_message; | |
0756eb3c PH |
3422 | |
3423 | RESPONSE_FAILED: | |
895fbaf2 JH |
3424 | { |
3425 | save_errno = errno; | |
3426 | message = NULL; | |
d093f8e5 JH |
3427 | sx.send_quit = check_response(host, &save_errno, addrlist->more_errno, |
3428 | sx.buffer, &code, &message, &pass_message); | |
895fbaf2 JH |
3429 | goto FAILED; |
3430 | } | |
0756eb3c PH |
3431 | |
3432 | SEND_FAILED: | |
895fbaf2 JH |
3433 | { |
3434 | save_errno = errno; | |
3435 | code = '4'; | |
b9df1829 | 3436 | message = string_sprintf("send() to %s [%s] failed: %s", |
c0ad8edf | 3437 | host->name, host->address, message ? message : US strerror(save_errno)); |
d093f8e5 | 3438 | sx.send_quit = FALSE; |
895fbaf2 JH |
3439 | goto FAILED; |
3440 | } | |
0756eb3c | 3441 | |
0756eb3c | 3442 | FAILED: |
9be4572b JH |
3443 | { |
3444 | BOOL message_error; | |
0756eb3c | 3445 | |
9be4572b JH |
3446 | sx.ok = FALSE; /* For when reached by GOTO */ |
3447 | set_message = message; | |
0756eb3c | 3448 | |
e97957bc | 3449 | /* We want to handle timeouts after MAIL or "." and loss of connection after |
0756eb3c | 3450 | "." specially. They can indicate a problem with the sender address or with |
e97957bc PH |
3451 | the contents of the message rather than a real error on the connection. These |
3452 | cases are treated in the same way as a 4xx response. This next bit of code | |
3453 | does the classification. */ | |
0756eb3c | 3454 | |
e97957bc PH |
3455 | switch(save_errno) |
3456 | { | |
3457 | case 0: | |
3458 | case ERRNO_MAIL4XX: | |
3459 | case ERRNO_DATA4XX: | |
250b6871 JH |
3460 | message_error = TRUE; |
3461 | break; | |
0756eb3c | 3462 | |
e97957bc | 3463 | case ETIMEDOUT: |
250b6871 JH |
3464 | message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 || |
3465 | Ustrncmp(smtp_command,"end ",4) == 0; | |
3466 | break; | |
e97957bc PH |
3467 | |
3468 | case ERRNO_SMTPCLOSED: | |
250b6871 JH |
3469 | message_error = Ustrncmp(smtp_command,"end ",4) == 0; |
3470 | break; | |
e97957bc PH |
3471 | |
3472 | default: | |
250b6871 JH |
3473 | message_error = FALSE; |
3474 | break; | |
e97957bc | 3475 | } |
0756eb3c | 3476 | |
e97957bc | 3477 | /* Handle the cases that are treated as message errors. These are: |
0756eb3c | 3478 | |
e97957bc PH |
3479 | (a) negative response or timeout after MAIL |
3480 | (b) negative response after DATA | |
3481 | (c) negative response or timeout or dropped connection after "." | |
250b6871 | 3482 | (d) utf8 support required and not offered |
0756eb3c | 3483 | |
e97957bc PH |
3484 | It won't be a negative response or timeout after RCPT, as that is dealt |
3485 | with separately above. The action in all cases is to set an appropriate | |
3486 | error code for all the addresses, but to leave yield set to OK because the | |
3487 | host itself has not failed. Of course, it might in practice have failed | |
3488 | when we've had a timeout, but if so, we'll discover that at the next | |
3489 | delivery attempt. For a temporary error, set the message_defer flag, and | |
3490 | write to the logs for information if this is not the last host. The error | |
3491 | for the last host will be logged as part of the address's log line. */ | |
3492 | ||
3493 | if (message_error) | |
0756eb3c | 3494 | { |
e97957bc | 3495 | if (mua_wrapper) code = '5'; /* Force hard failure in wrapper mode */ |
e97957bc PH |
3496 | |
3497 | /* If there's an errno, the message contains just the identity of | |
3498 | the host. */ | |
3499 | ||
895fbaf2 JH |
3500 | if (code == '5') |
3501 | set_rc = FAIL; | |
3502 | else /* Anything other than 5 is treated as temporary */ | |
e97957bc | 3503 | { |
895fbaf2 | 3504 | set_rc = DEFER; |
e97957bc PH |
3505 | if (save_errno > 0) |
3506 | message = US string_sprintf("%s: %s", message, strerror(save_errno)); | |
ec62d0a9 HSHR |
3507 | |
3508 | write_logs(host, message, sx.first_addr ? sx.first_addr->basic_errno : 0); | |
3509 | ||
e97957bc PH |
3510 | *message_defer = TRUE; |
3511 | } | |
3512 | } | |
3513 | ||
3514 | /* Otherwise, we have an I/O error or a timeout other than after MAIL or | |
3515 | ".", or some other transportation error. We defer all addresses and yield | |
3516 | DEFER, except for the case of failed add_headers expansion, or a transport | |
3517 | filter failure, when the yield should be ERROR, to stop it trying other | |
3518 | hosts. */ | |
3519 | ||
3520 | else | |
3521 | { | |
895fbaf2 | 3522 | set_rc = DEFER; |
e97957bc PH |
3523 | yield = (save_errno == ERRNO_CHHEADER_FAIL || |
3524 | save_errno == ERRNO_FILTER_FAIL)? ERROR : DEFER; | |
0756eb3c PH |
3525 | } |
3526 | } | |
895fbaf2 JH |
3527 | |
3528 | set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host | |
3529 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 3530 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3531 | #endif |
3532 | ); | |
0756eb3c PH |
3533 | } |
3534 | ||
3535 | ||
3536 | /* If all has gone well, send_quit will be set TRUE, implying we can end the | |
3537 | SMTP session tidily. However, if there were too many addresses to send in one | |
3538 | message (indicated by first_addr being non-NULL) we want to carry on with the | |
3539 | rest of them. Also, it is desirable to send more than one message down the SMTP | |
3540 | connection if there are several waiting, provided we haven't already sent so | |
3541 | many as to hit the configured limit. The function transport_check_waiting looks | |
3542 | for a waiting message and returns its id. Then transport_pass_socket tries to | |
3543 | set up a continued delivery by passing the socket on to another process. The | |
3544 | variable send_rset is FALSE if a message has just been successfully transfered. | |
3545 | ||
3546 | If we are already sending down a continued channel, there may be further | |
3547 | addresses not yet delivered that are aimed at the same host, but which have not | |
3548 | been passed in this run of the transport. In this case, continue_more will be | |
3549 | true, and all we should do is send RSET if necessary, and return, leaving the | |
3550 | channel open. | |
3551 | ||
3552 | However, if no address was disposed of, i.e. all addresses got 4xx errors, we | |
3553 | do not want to continue with other messages down the same channel, because that | |
3554 | can lead to looping between two or more messages, all with the same, | |
3555 | temporarily failing address(es). [The retry information isn't updated yet, so | |
3556 | new processes keep on trying.] We probably also don't want to try more of this | |
3557 | message's addresses either. | |
3558 | ||
3559 | If we have started a TLS session, we have to end it before passing the | |
3560 | connection to a new process. However, not all servers can handle this (Exim | |
3561 | can), so we do not pass such a connection on if the host matches | |
3562 | hosts_nopass_tls. */ | |
3563 | ||
3564 | DEBUG(D_transport) | |
3565 | debug_printf("ok=%d send_quit=%d send_rset=%d continue_more=%d " | |
d093f8e5 | 3566 | "yield=%d first_address is %sNULL\n", sx.ok, sx.send_quit, |
d9c3c8ed | 3567 | sx.send_rset, continue_more, yield, sx.first_addr ? "not " : ""); |
0756eb3c | 3568 | |
d9c3c8ed | 3569 | if (sx.completed_addr && sx.ok && sx.send_quit) |
0756eb3c PH |
3570 | { |
3571 | BOOL more; | |
a39bd74d JB |
3572 | smtp_compare_t t_compare; |
3573 | ||
3574 | t_compare.tblock = tblock; | |
3575 | t_compare.current_sender_address = sender_address; | |
3576 | ||
d9c3c8ed | 3577 | if ( sx.first_addr != NULL |
5130845b | 3578 | || continue_more |
875512a3 JH |
3579 | || ( |
3580 | #ifdef SUPPORT_TLS | |
74f1a423 | 3581 | ( tls_out.active.sock < 0 && !continue_proxy_cipher |
d093f8e5 | 3582 | || verify_check_given_host(&sx.ob->hosts_nopass_tls, host) != OK |
5130845b | 3583 | ) |
0756eb3c | 3584 | && |
875512a3 | 3585 | #endif |
0756eb3c | 3586 | transport_check_waiting(tblock->name, host->name, |
a39bd74d JB |
3587 | tblock->connection_max_messages, new_message_id, &more, |
3588 | (oicf)smtp_are_same_identities, (void*)&t_compare) | |
5130845b | 3589 | ) ) |
0756eb3c PH |
3590 | { |
3591 | uschar *msg; | |
447d236c | 3592 | BOOL pass_message; |
0756eb3c | 3593 | |
d093f8e5 | 3594 | if (sx.send_rset) |
4e910c01 | 3595 | if (! (sx.ok = smtp_write_command(&sx.outblock, SCMD_FLUSH, "RSET\r\n") >= 0)) |
0756eb3c PH |
3596 | { |
3597 | msg = US string_sprintf("send() to %s [%s] failed: %s", host->name, | |
9e7e0f6a | 3598 | host->address, strerror(errno)); |
d093f8e5 | 3599 | sx.send_quit = FALSE; |
0756eb3c | 3600 | } |
d093f8e5 JH |
3601 | else if (! (sx.ok = smtp_read_response(&sx.inblock, sx.buffer, |
3602 | sizeof(sx.buffer), '2', sx.ob->command_timeout))) | |
0756eb3c PH |
3603 | { |
3604 | int code; | |
d093f8e5 | 3605 | sx.send_quit = check_response(host, &errno, 0, sx.buffer, &code, &msg, |
447d236c | 3606 | &pass_message); |
d093f8e5 | 3607 | if (!sx.send_quit) |
0756eb3c | 3608 | { |
c562fd30 JH |
3609 | DEBUG(D_transport) debug_printf("H=%s [%s] %s\n", |
3610 | host->name, host->address, msg); | |
0756eb3c PH |
3611 | } |
3612 | } | |
0756eb3c PH |
3613 | |
3614 | /* Either RSET was not needed, or it succeeded */ | |
3615 | ||
d093f8e5 | 3616 | if (sx.ok) |
0756eb3c | 3617 | { |
875512a3 | 3618 | int pfd[2]; |
74f1a423 | 3619 | int socket_fd = sx.cctx.sock; |
875512a3 JH |
3620 | |
3621 | ||
3622 | if (sx.first_addr != NULL) /* More addresses still to be sent */ | |
0756eb3c PH |
3623 | { /* in this run of the transport */ |
3624 | continue_sequence++; /* Causes * in logging */ | |
3625 | goto SEND_MESSAGE; | |
3626 | } | |
0756eb3c | 3627 | |
b7d3afcf JH |
3628 | /* Unless caller said it already has more messages listed for this host, |
3629 | pass the connection on to a new Exim process (below, the call to | |
3630 | transport_pass_socket). If the caller has more ready, just return with | |
3631 | the connection still open. */ | |
3632 | ||
a7538db1 | 3633 | #ifdef SUPPORT_TLS |
74f1a423 | 3634 | if (tls_out.active.sock >= 0) |
b7d3afcf JH |
3635 | if ( continue_more |
3636 | || verify_check_given_host(&sx.ob->hosts_noproxy_tls, host) == OK) | |
875512a3 | 3637 | { |
b7d3afcf JH |
3638 | /* Before passing the socket on, or returning to caller with it still |
3639 | open, we must shut down TLS. Not all MTAs allow for the continuation | |
3640 | of the SMTP session when TLS is shut down. We test for this by sending | |
3641 | a new EHLO. If we don't get a good response, we don't attempt to pass | |
3642 | the socket on. */ | |
875512a3 | 3643 | |
74f1a423 | 3644 | tls_close(sx.cctx.tls_ctx, TLS_SHUTDOWN_WAIT); |
c645dd29 | 3645 | sx.cctx.tls_ctx = NULL; |
875512a3 JH |
3646 | smtp_peer_options = smtp_peer_options_wrap; |
3647 | sx.ok = !sx.smtps | |
4e910c01 | 3648 | && smtp_write_command(&sx.outblock, SCMD_FLUSH, |
875512a3 JH |
3649 | "EHLO %s\r\n", sx.helo_data) >= 0 |
3650 | && smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), | |
3651 | '2', sx.ob->command_timeout); | |
b7d3afcf JH |
3652 | |
3653 | if (sx.ok && continue_more) | |
3654 | return yield; /* More addresses for another run */ | |
875512a3 JH |
3655 | } |
3656 | else | |
3657 | { | |
3658 | /* Set up a pipe for proxying TLS for the new transport process */ | |
3659 | ||
14de8063 | 3660 | smtp_peer_options |= OPTION_TLS; |
fa18eebc | 3661 | if (sx.ok = (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) == 0)) |
875512a3 JH |
3662 | socket_fd = pfd[1]; |
3663 | else | |
3664 | set_errno(sx.first_addr, errno, US"internal allocation problem", | |
3665 | DEFER, FALSE, host | |
3666 | # ifdef EXPERIMENTAL_DSN_INFO | |
3667 | , sx.smtp_greeting, sx.helo_response | |
3668 | # endif | |
3669 | ); | |
3670 | } | |
b7d3afcf | 3671 | else |
a7538db1 | 3672 | #endif |
b7d3afcf JH |
3673 | if (continue_more) |
3674 | return yield; /* More addresses for another run */ | |
0756eb3c | 3675 | |
4c04137d | 3676 | /* If the socket is successfully passed, we mustn't send QUIT (or |
0756eb3c PH |
3677 | indeed anything!) from here. */ |
3678 | ||
895fbaf2 JH |
3679 | /*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to |
3680 | propagate it from the initial | |
3681 | */ | |
d093f8e5 | 3682 | if (sx.ok && transport_pass_socket(tblock->name, host->name, |
875512a3 JH |
3683 | host->address, new_message_id, socket_fd)) |
3684 | { | |
d093f8e5 | 3685 | sx.send_quit = FALSE; |
875512a3 | 3686 | |
d097cc73 JH |
3687 | /* We have passed the client socket to a fresh transport process. |
3688 | If TLS is still active, we need to proxy it for the transport we | |
875512a3 JH |
3689 | just passed the baton to. Fork a child to to do it, and return to |
3690 | get logging done asap. Which way to place the work makes assumptions | |
3691 | about post-fork prioritisation which may not hold on all platforms. */ | |
57cc2785 | 3692 | #ifdef SUPPORT_TLS |
74f1a423 | 3693 | if (tls_out.active.sock >= 0) |
875512a3 JH |
3694 | { |
3695 | int pid = fork(); | |
d097cc73 | 3696 | if (pid == 0) /* child; fork again to disconnect totally */ |
626810b9 JH |
3697 | { |
3698 | if (running_in_test_harness) millisleep(100); /* let parent debug out */ | |
d097cc73 | 3699 | /* does not return */ |
74f1a423 | 3700 | smtp_proxy_tls(sx.cctx.tls_ctx, sx.buffer, sizeof(sx.buffer), pfd, |
d097cc73 | 3701 | sx.ob->command_timeout); |
626810b9 | 3702 | } |
d097cc73 | 3703 | |
875512a3 JH |
3704 | if (pid > 0) /* parent */ |
3705 | { | |
b7d3afcf | 3706 | DEBUG(D_transport) debug_printf("proxy-proc inter-pid %d\n", pid); |
e47252f5 | 3707 | close(pfd[0]); |
d097cc73 | 3708 | /* tidy the inter-proc to disconn the proxy proc */ |
60272099 | 3709 | waitpid(pid, NULL, 0); |
74f1a423 JH |
3710 | tls_close(sx.cctx.tls_ctx, TLS_NO_SHUTDOWN); |
3711 | sx.cctx.tls_ctx = NULL; | |
3712 | (void)close(sx.cctx.sock); | |
3713 | sx.cctx.sock = -1; | |
875512a3 JH |
3714 | continue_transport = NULL; |
3715 | continue_hostname = NULL; | |
3716 | return yield; | |
3717 | } | |
d097cc73 | 3718 | log_write(0, LOG_PANIC_DIE, "fork failed"); |
875512a3 | 3719 | } |
57cc2785 | 3720 | #endif |
875512a3 | 3721 | } |
0756eb3c PH |
3722 | } |
3723 | ||
3724 | /* If RSET failed and there are addresses left, they get deferred. */ | |
875512a3 JH |
3725 | else |
3726 | set_errno(sx.first_addr, errno, msg, DEFER, FALSE, host | |
895fbaf2 | 3727 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 3728 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3729 | #endif |
3730 | ); | |
0756eb3c PH |
3731 | } |
3732 | } | |
3733 | ||
3734 | /* End off tidily with QUIT unless the connection has died or the socket has | |
3735 | been passed to another process. There has been discussion on the net about what | |
3736 | to do after sending QUIT. The wording of the RFC suggests that it is necessary | |
3737 | to wait for a response, but on the other hand, there isn't anything one can do | |
3738 | with an error response, other than log it. Exim used to do that. However, | |
3739 | further discussion suggested that it is positively advantageous not to wait for | |
3740 | the response, but to close the session immediately. This is supposed to move | |
3741 | the TCP/IP TIME_WAIT state from the server to the client, thereby removing some | |
3742 | load from the server. (Hosts that are both servers and clients may not see much | |
3743 | difference, of course.) Further discussion indicated that this was safe to do | |
3744 | on Unix systems which have decent implementations of TCP/IP that leave the | |
3745 | connection around for a while (TIME_WAIT) after the application has gone away. | |
3746 | This enables the response sent by the server to be properly ACKed rather than | |
3747 | timed out, as can happen on broken TCP/IP implementations on other OS. | |
3748 | ||
3749 | This change is being made on 31-Jul-98. After over a year of trouble-free | |
3750 | operation, the old commented-out code was removed on 17-Sep-99. */ | |
3751 | ||
3752 | SEND_QUIT: | |
4e910c01 | 3753 | if (sx.send_quit) (void)smtp_write_command(&sx.outblock, SCMD_FLUSH, "QUIT\r\n"); |
0756eb3c PH |
3754 | |
3755 | END_OFF: | |
3756 | ||
3757 | #ifdef SUPPORT_TLS | |
74f1a423 | 3758 | tls_close(sx.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); |
c645dd29 | 3759 | sx.cctx.tls_ctx = NULL; |
0756eb3c PH |
3760 | #endif |
3761 | ||
3762 | /* Close the socket, and return the appropriate value, first setting | |
0756eb3c PH |
3763 | works because the NULL setting is passed back to the calling process, and |
3764 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
3765 | ||
3766 | If all went well and continue_more is set, we shouldn't actually get here if | |
3767 | there are further addresses, as the return above will be taken. However, | |
3768 | writing RSET might have failed, or there may be other addresses whose hosts are | |
3769 | specified in the transports, and therefore not visible at top level, in which | |
3770 | case continue_more won't get set. */ | |
3771 | ||
e1d04f48 | 3772 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
d093f8e5 | 3773 | if (sx.send_quit) |
60d10ce7 | 3774 | { |
74f1a423 JH |
3775 | shutdown(sx.cctx.sock, SHUT_WR); |
3776 | if (fcntl(sx.cctx.sock, F_SETFL, O_NONBLOCK) == 0) | |
3777 | for (rc = 16; read(sx.cctx.sock, sx.inbuffer, sizeof(sx.inbuffer)) > 0 && rc > 0;) | |
5ddc9771 | 3778 | rc--; /* drain socket */ |
60d10ce7 | 3779 | } |
74f1a423 | 3780 | (void)close(sx.cctx.sock); |
a7538db1 | 3781 | |
0cbf2b82 | 3782 | #ifndef DISABLE_EVENT |
774ef2d7 | 3783 | (void) event_raise(tblock->event_action, US"tcp:close", NULL); |
a7538db1 JH |
3784 | #endif |
3785 | ||
0756eb3c PH |
3786 | continue_transport = NULL; |
3787 | continue_hostname = NULL; | |
3788 | return yield; | |
3789 | } | |
3790 | ||
3791 | ||
3792 | ||
3793 | ||
3794 | /************************************************* | |
3795 | * Closedown entry point * | |
3796 | *************************************************/ | |
3797 | ||
3798 | /* This function is called when exim is passed an open smtp channel | |
3799 | from another incarnation, but the message which it has been asked | |
3800 | to deliver no longer exists. The channel is on stdin. | |
3801 | ||
3802 | We might do fancy things like looking for another message to send down | |
3803 | the channel, but if the one we sought has gone, it has probably been | |
3804 | delivered by some other process that itself will seek further messages, | |
3805 | so just close down our connection. | |
3806 | ||
3807 | Argument: pointer to the transport instance block | |
3808 | Returns: nothing | |
3809 | */ | |
3810 | ||
3811 | void | |
3812 | smtp_transport_closedown(transport_instance *tblock) | |
3813 | { | |
3814 | smtp_transport_options_block *ob = | |
02b41d71 | 3815 | (smtp_transport_options_block *)tblock->options_block; |
74f1a423 | 3816 | client_conn_ctx cctx; |
0756eb3c PH |
3817 | smtp_inblock inblock; |
3818 | smtp_outblock outblock; | |
3819 | uschar buffer[256]; | |
3820 | uschar inbuffer[4096]; | |
3821 | uschar outbuffer[16]; | |
3822 | ||
74f1a423 JH |
3823 | /*XXX really we need an active-smtp-client ctx, rather than assuming stdout */ |
3824 | cctx.sock = fileno(stdin); | |
3825 | cctx.tls_ctx = cctx.sock == tls_out.active.sock ? tls_out.active.tls_ctx : NULL; | |
3826 | ||
3827 | inblock.cctx = &cctx; | |
0756eb3c PH |
3828 | inblock.buffer = inbuffer; |
3829 | inblock.buffersize = sizeof(inbuffer); | |
3830 | inblock.ptr = inbuffer; | |
3831 | inblock.ptrend = inbuffer; | |
3832 | ||
74f1a423 | 3833 | outblock.cctx = &cctx; |
0756eb3c PH |
3834 | outblock.buffersize = sizeof(outbuffer); |
3835 | outblock.buffer = outbuffer; | |
3836 | outblock.ptr = outbuffer; | |
3837 | outblock.cmd_count = 0; | |
3838 | outblock.authenticating = FALSE; | |
3839 | ||
4e910c01 | 3840 | (void)smtp_write_command(&outblock, SCMD_FLUSH, "QUIT\r\n"); |
0756eb3c PH |
3841 | (void)smtp_read_response(&inblock, buffer, sizeof(buffer), '2', |
3842 | ob->command_timeout); | |
74f1a423 | 3843 | (void)close(cctx.sock); |
0756eb3c PH |
3844 | } |
3845 | ||
3846 | ||
3847 | ||
3848 | /************************************************* | |
3849 | * Prepare addresses for delivery * | |
3850 | *************************************************/ | |
3851 | ||
3852 | /* This function is called to flush out error settings from previous delivery | |
3853 | attempts to other hosts. It also records whether we got here via an MX record | |
3854 | or not in the more_errno field of the address. We are interested only in | |
3855 | addresses that are still marked DEFER - others may have got delivered to a | |
3856 | previously considered IP address. Set their status to PENDING_DEFER to indicate | |
3857 | which ones are relevant this time. | |
3858 | ||
3859 | Arguments: | |
3860 | addrlist the list of addresses | |
3861 | host the host we are delivering to | |
3862 | ||
3863 | Returns: the first address for this delivery | |
3864 | */ | |
3865 | ||
3866 | static address_item * | |
3867 | prepare_addresses(address_item *addrlist, host_item *host) | |
3868 | { | |
3869 | address_item *first_addr = NULL; | |
3870 | address_item *addr; | |
7b4c8c1f | 3871 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b JH |
3872 | if (addr->transport_return == DEFER) |
3873 | { | |
7b4c8c1f | 3874 | if (!first_addr) first_addr = addr; |
168dec3b JH |
3875 | addr->transport_return = PENDING_DEFER; |
3876 | addr->basic_errno = 0; | |
3877 | addr->more_errno = (host->mx >= 0)? 'M' : 'A'; | |
3878 | addr->message = NULL; | |
a7538db1 | 3879 | #ifdef SUPPORT_TLS |
168dec3b JH |
3880 | addr->cipher = NULL; |
3881 | addr->ourcert = NULL; | |
3882 | addr->peercert = NULL; | |
3883 | addr->peerdn = NULL; | |
3884 | addr->ocsp = OCSP_NOT_REQ; | |
895fbaf2 JH |
3885 | #endif |
3886 | #ifdef EXPERIMENTAL_DSN_INFO | |
3887 | addr->smtp_greeting = NULL; | |
3888 | addr->helo_response = NULL; | |
a7538db1 | 3889 | #endif |
168dec3b | 3890 | } |
0756eb3c PH |
3891 | return first_addr; |
3892 | } | |
3893 | ||
3894 | ||
3895 | ||
3896 | /************************************************* | |
3897 | * Main entry point * | |
3898 | *************************************************/ | |
3899 | ||
3900 | /* See local README for interface details. As this is a remote transport, it is | |
3901 | given a chain of addresses to be delivered in one connection, if possible. It | |
3902 | always returns TRUE, indicating that each address has its own independent | |
3903 | status set, except if there is a setting up problem, in which case it returns | |
3904 | FALSE. */ | |
3905 | ||
3906 | BOOL | |
3907 | smtp_transport_entry( | |
3908 | transport_instance *tblock, /* data for this instantiation */ | |
3909 | address_item *addrlist) /* addresses we are working on */ | |
3910 | { | |
3911 | int cutoff_retry; | |
a843a57e | 3912 | int defport; |
0756eb3c PH |
3913 | int hosts_defer = 0; |
3914 | int hosts_fail = 0; | |
3915 | int hosts_looked_up = 0; | |
3916 | int hosts_retry = 0; | |
3917 | int hosts_serial = 0; | |
3918 | int hosts_total = 0; | |
8e669ac1 | 3919 | int total_hosts_tried = 0; |
0756eb3c PH |
3920 | address_item *addr; |
3921 | BOOL expired = TRUE; | |
0756eb3c PH |
3922 | uschar *expanded_hosts = NULL; |
3923 | uschar *pistring; | |
3924 | uschar *tid = string_sprintf("%s transport", tblock->name); | |
3925 | smtp_transport_options_block *ob = | |
3926 | (smtp_transport_options_block *)(tblock->options_block); | |
3927 | host_item *hostlist = addrlist->host_list; | |
f8ea1886 | 3928 | host_item *host; |
0756eb3c PH |
3929 | |
3930 | DEBUG(D_transport) | |
3931 | { | |
3932 | debug_printf("%s transport entered\n", tblock->name); | |
7b4c8c1f | 3933 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c | 3934 | debug_printf(" %s\n", addr->address); |
7b4c8c1f JH |
3935 | if (hostlist) |
3936 | { | |
3937 | debug_printf("hostlist:\n"); | |
3938 | for (host = hostlist; host; host = host->next) | |
f8ea1886 | 3939 | debug_printf(" '%s' IP %s port %d\n", host->name, host->address, host->port); |
7b4c8c1f | 3940 | } |
57cc2785 JH |
3941 | if (continue_hostname) |
3942 | debug_printf("already connected to %s [%s] (on fd %d)\n", | |
3943 | continue_hostname, continue_host_address, | |
74f1a423 | 3944 | cutthrough.cctx.sock >= 0 ? cutthrough.cctx.sock : 0); |
0756eb3c PH |
3945 | } |
3946 | ||
f6c332bd PH |
3947 | /* Set the flag requesting that these hosts be added to the waiting |
3948 | database if the delivery fails temporarily or if we are running with | |
3949 | queue_smtp or a 2-stage queue run. This gets unset for certain | |
3950 | kinds of error, typically those that are specific to the message. */ | |
3951 | ||
3952 | update_waiting = TRUE; | |
3953 | ||
0756eb3c PH |
3954 | /* If a host list is not defined for the addresses - they must all have the |
3955 | same one in order to be passed to a single transport - or if the transport has | |
3956 | a host list with hosts_override set, use the host list supplied with the | |
3957 | transport. It is an error for this not to exist. */ | |
3958 | ||
8ac90765 JH |
3959 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) |
3960 | if (tls_requiretls & REQUIRETLS_MSG) | |
3961 | ob->tls_tempfail_tryclear = FALSE; /*XXX surely we should have a local for this | |
3962 | rather than modifying the transport? */ | |
3963 | #endif | |
3964 | ||
7b4c8c1f | 3965 | if (!hostlist || (ob->hosts_override && ob->hosts)) |
0756eb3c | 3966 | { |
7b4c8c1f | 3967 | if (!ob->hosts) |
0756eb3c PH |
3968 | { |
3969 | addrlist->message = string_sprintf("%s transport called with no hosts set", | |
3970 | tblock->name); | |
3971 | addrlist->transport_return = PANIC; | |
3972 | return FALSE; /* Only top address has status */ | |
3973 | } | |
3974 | ||
3975 | DEBUG(D_transport) debug_printf("using the transport's hosts: %s\n", | |
3976 | ob->hosts); | |
3977 | ||
3978 | /* If the transport's host list contains no '$' characters, and we are not | |
3979 | randomizing, it is fixed and therefore a chain of hosts can be built once | |
3980 | and for all, and remembered for subsequent use by other calls to this | |
3981 | transport. If, on the other hand, the host list does contain '$', or we are | |
3982 | randomizing its order, we have to rebuild it each time. In the fixed case, | |
3983 | as the hosts string will never be used again, it doesn't matter that we | |
3984 | replace all the : characters with zeros. */ | |
3985 | ||
7b4c8c1f | 3986 | if (!ob->hostlist) |
0756eb3c PH |
3987 | { |
3988 | uschar *s = ob->hosts; | |
3989 | ||
3990 | if (Ustrchr(s, '$') != NULL) | |
3991 | { | |
d427a7f9 | 3992 | if (!(expanded_hosts = expand_string(s))) |
0756eb3c PH |
3993 | { |
3994 | addrlist->message = string_sprintf("failed to expand list of hosts " | |
3995 | "\"%s\" in %s transport: %s", s, tblock->name, expand_string_message); | |
7b4c8c1f | 3996 | addrlist->transport_return = search_find_defer ? DEFER : PANIC; |
0756eb3c PH |
3997 | return FALSE; /* Only top address has status */ |
3998 | } | |
3999 | DEBUG(D_transport) debug_printf("expanded list of hosts \"%s\" to " | |
4000 | "\"%s\"\n", s, expanded_hosts); | |
4001 | s = expanded_hosts; | |
4002 | } | |
4003 | else | |
4004 | if (ob->hosts_randomize) s = expanded_hosts = string_copy(s); | |
4005 | ||
4006 | host_build_hostlist(&hostlist, s, ob->hosts_randomize); | |
4007 | ||
e276e04b | 4008 | /* Check that the expansion yielded something useful. */ |
7b4c8c1f | 4009 | if (!hostlist) |
e276e04b TF |
4010 | { |
4011 | addrlist->message = | |
4012 | string_sprintf("%s transport has empty hosts setting", tblock->name); | |
4013 | addrlist->transport_return = PANIC; | |
4014 | return FALSE; /* Only top address has status */ | |
4015 | } | |
4016 | ||
0756eb3c PH |
4017 | /* If there was no expansion of hosts, save the host list for |
4018 | next time. */ | |
4019 | ||
d427a7f9 | 4020 | if (!expanded_hosts) ob->hostlist = hostlist; |
0756eb3c PH |
4021 | } |
4022 | ||
4023 | /* This is not the first time this transport has been run in this delivery; | |
4024 | the host list was built previously. */ | |
4025 | ||
55414b25 JH |
4026 | else |
4027 | hostlist = ob->hostlist; | |
0756eb3c PH |
4028 | } |
4029 | ||
4030 | /* The host list was supplied with the address. If hosts_randomize is set, we | |
4031 | must sort it into a random order if it did not come from MX records and has not | |
4032 | already been randomized (but don't bother if continuing down an existing | |
4033 | connection). */ | |
4034 | ||
7b4c8c1f | 4035 | else if (ob->hosts_randomize && hostlist->mx == MX_NONE && !continue_hostname) |
0756eb3c PH |
4036 | { |
4037 | host_item *newlist = NULL; | |
7b4c8c1f | 4038 | while (hostlist) |
0756eb3c PH |
4039 | { |
4040 | host_item *h = hostlist; | |
4041 | hostlist = hostlist->next; | |
4042 | ||
4043 | h->sort_key = random_number(100); | |
4044 | ||
7b4c8c1f | 4045 | if (!newlist) |
0756eb3c PH |
4046 | { |
4047 | h->next = NULL; | |
4048 | newlist = h; | |
4049 | } | |
4050 | else if (h->sort_key < newlist->sort_key) | |
4051 | { | |
4052 | h->next = newlist; | |
4053 | newlist = h; | |
4054 | } | |
4055 | else | |
4056 | { | |
4057 | host_item *hh = newlist; | |
7b4c8c1f | 4058 | while (hh->next) |
0756eb3c PH |
4059 | { |
4060 | if (h->sort_key < hh->next->sort_key) break; | |
4061 | hh = hh->next; | |
4062 | } | |
4063 | h->next = hh->next; | |
4064 | hh->next = h; | |
4065 | } | |
4066 | } | |
4067 | ||
4068 | hostlist = addrlist->host_list = newlist; | |
4069 | } | |
4070 | ||
2d280592 | 4071 | /* Sort out the default port. */ |
0756eb3c | 4072 | |
a843a57e | 4073 | if (!smtp_get_port(ob->port, addrlist, &defport, tid)) return FALSE; |
0756eb3c | 4074 | |
0756eb3c PH |
4075 | /* For each host-plus-IP-address on the list: |
4076 | ||
4077 | . If this is a continued delivery and the host isn't the one with the | |
4078 | current connection, skip. | |
4079 | ||
4080 | . If the status is unusable (i.e. previously failed or retry checked), skip. | |
4081 | ||
4082 | . If no IP address set, get the address, either by turning the name into | |
4083 | an address, calling gethostbyname if gethostbyname is on, or by calling | |
4084 | the DNS. The DNS may yield multiple addresses, in which case insert the | |
4085 | extra ones into the list. | |
4086 | ||
4087 | . Get the retry data if not previously obtained for this address and set the | |
4088 | field which remembers the state of this address. Skip if the retry time is | |
4089 | not reached. If not, remember whether retry data was found. The retry string | |
4090 | contains both the name and the IP address. | |
4091 | ||
4092 | . Scan the list of addresses and mark those whose status is DEFER as | |
4093 | PENDING_DEFER. These are the only ones that will be processed in this cycle | |
4094 | of the hosts loop. | |
4095 | ||
4096 | . Make a delivery attempt - addresses marked PENDING_DEFER will be tried. | |
4097 | Some addresses may be successfully delivered, others may fail, and yet | |
4098 | others may get temporary errors and so get marked DEFER. | |
4099 | ||
4100 | . The return from the delivery attempt is OK if a connection was made and a | |
4101 | valid SMTP dialogue was completed. Otherwise it is DEFER. | |
4102 | ||
4103 | . If OK, add a "remove" retry item for this host/IPaddress, if any. | |
4104 | ||
4105 | . If fail to connect, or other defer state, add a retry item. | |
4106 | ||
4107 | . If there are any addresses whose status is still DEFER, carry on to the | |
4108 | next host/IPaddress, unless we have tried the number of hosts given | |
533244af | 4109 | by hosts_max_try or hosts_max_try_hardlimit; otherwise return. Note that |
8e669ac1 PH |
4110 | there is some fancy logic for hosts_max_try that means its limit can be |
4111 | overstepped in some circumstances. | |
0756eb3c PH |
4112 | |
4113 | If we get to the end of the list, all hosts have deferred at least one address, | |
4114 | or not reached their retry times. If delay_after_cutoff is unset, it requests a | |
4115 | delivery attempt to those hosts whose last try was before the arrival time of | |
4116 | the current message. To cope with this, we have to go round the loop a second | |
4117 | time. After that, set the status and error data for any addresses that haven't | |
4118 | had it set already. */ | |
4119 | ||
7b4c8c1f JH |
4120 | for (cutoff_retry = 0; |
4121 | expired && cutoff_retry < (ob->delay_after_cutoff ? 1 : 2); | |
0756eb3c PH |
4122 | cutoff_retry++) |
4123 | { | |
4124 | host_item *nexthost = NULL; | |
4125 | int unexpired_hosts_tried = 0; | |
2577f55f | 4126 | BOOL continue_host_tried = FALSE; |
0756eb3c | 4127 | |
2577f55f | 4128 | retry_non_continued: |
0756eb3c | 4129 | for (host = hostlist; |
7b4c8c1f JH |
4130 | host |
4131 | && unexpired_hosts_tried < ob->hosts_max_try | |
4132 | && total_hosts_tried < ob->hosts_max_try_hardlimit; | |
0756eb3c PH |
4133 | host = nexthost) |
4134 | { | |
4135 | int rc; | |
4136 | int host_af; | |
4137 | uschar *rs; | |
0756eb3c PH |
4138 | BOOL host_is_expired = FALSE; |
4139 | BOOL message_defer = FALSE; | |
0756eb3c PH |
4140 | BOOL some_deferred = FALSE; |
4141 | address_item *first_addr = NULL; | |
4142 | uschar *interface = NULL; | |
4143 | uschar *retry_host_key = NULL; | |
4144 | uschar *retry_message_key = NULL; | |
4145 | uschar *serialize_key = NULL; | |
4146 | ||
9c4e8f60 PH |
4147 | /* Default next host is next host. :-) But this can vary if the |
4148 | hosts_max_try limit is hit (see below). It may also be reset if a host | |
4149 | address is looked up here (in case the host was multihomed). */ | |
4150 | ||
4151 | nexthost = host->next; | |
4152 | ||
0756eb3c PH |
4153 | /* If the address hasn't yet been obtained from the host name, look it up |
4154 | now, unless the host is already marked as unusable. If it is marked as | |
4155 | unusable, it means that the router was unable to find its IP address (in | |
4156 | the DNS or wherever) OR we are in the 2nd time round the cutoff loop, and | |
4157 | the lookup failed last time. We don't get this far if *all* MX records | |
4158 | point to non-existent hosts; that is treated as a hard error. | |
4159 | ||
4160 | We can just skip this host entirely. When the hosts came from the router, | |
4161 | the address will timeout based on the other host(s); when the address is | |
4162 | looked up below, there is an explicit retry record added. | |
4163 | ||
4164 | Note that we mustn't skip unusable hosts if the address is not unset; they | |
4165 | may be needed as expired hosts on the 2nd time round the cutoff loop. */ | |
4166 | ||
7b4c8c1f | 4167 | if (!host->address) |
0756eb3c | 4168 | { |
322050c2 | 4169 | int new_port, flags; |
7cd1141b | 4170 | host_item *hh; |
0756eb3c PH |
4171 | |
4172 | if (host->status >= hstatus_unusable) | |
4173 | { | |
4174 | DEBUG(D_transport) debug_printf("%s has no address and is unusable - skipping\n", | |
4175 | host->name); | |
4176 | continue; | |
4177 | } | |
4178 | ||
4179 | DEBUG(D_transport) debug_printf("getting address for %s\n", host->name); | |
4180 | ||
7cd1141b PH |
4181 | /* The host name is permitted to have an attached port. Find it, and |
4182 | strip it from the name. Just remember it for now. */ | |
4183 | ||
4184 | new_port = host_item_get_port(host); | |
4185 | ||
4186 | /* Count hosts looked up */ | |
4187 | ||
0756eb3c PH |
4188 | hosts_looked_up++; |
4189 | ||
4190 | /* Find by name if so configured, or if it's an IP address. We don't | |
4191 | just copy the IP address, because we need the test-for-local to happen. */ | |
4192 | ||
66387a73 | 4193 | flags = HOST_FIND_BY_A | HOST_FIND_BY_AAAA; |
322050c2 PH |
4194 | if (ob->dns_qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE; |
4195 | if (ob->dns_search_parents) flags |= HOST_FIND_SEARCH_PARENTS; | |
4196 | ||
7e66e54d | 4197 | if (ob->gethostbyname || string_is_ip_address(host->name, NULL) != 0) |
55414b25 | 4198 | rc = host_find_byname(host, NULL, flags, NULL, TRUE); |
0756eb3c | 4199 | else |
0756eb3c | 4200 | rc = host_find_bydns(host, NULL, flags, NULL, NULL, NULL, |
7cd171b7 | 4201 | &ob->dnssec, /* domains for request/require */ |
55414b25 | 4202 | NULL, NULL); |
0756eb3c | 4203 | |
7cd1141b PH |
4204 | /* Update the host (and any additional blocks, resulting from |
4205 | multihoming) with a host-specific port, if any. */ | |
4206 | ||
4207 | for (hh = host; hh != nexthost; hh = hh->next) hh->port = new_port; | |
4208 | ||
0756eb3c PH |
4209 | /* Failure to find the host at this time (usually DNS temporary failure) |
4210 | is really a kind of routing failure rather than a transport failure. | |
4211 | Therefore we add a retry item of the routing kind, not to stop us trying | |
4212 | to look this name up here again, but to ensure the address gets timed | |
4213 | out if the failures go on long enough. A complete failure at this point | |
4214 | commonly points to a configuration error, but the best action is still | |
4215 | to carry on for the next host. */ | |
4216 | ||
2546388c | 4217 | if (rc == HOST_FIND_AGAIN || rc == HOST_FIND_SECURITY || rc == HOST_FIND_FAILED) |
0756eb3c PH |
4218 | { |
4219 | retry_add_item(addrlist, string_sprintf("R:%s", host->name), 0); | |
4220 | expired = FALSE; | |
4221 | if (rc == HOST_FIND_AGAIN) hosts_defer++; else hosts_fail++; | |
4222 | DEBUG(D_transport) debug_printf("rc = %s for %s\n", (rc == HOST_FIND_AGAIN)? | |
4223 | "HOST_FIND_AGAIN" : "HOST_FIND_FAILED", host->name); | |
4224 | host->status = hstatus_unusable; | |
4225 | ||
7b4c8c1f | 4226 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4227 | { |
4228 | if (addr->transport_return != DEFER) continue; | |
4229 | addr->basic_errno = ERRNO_UNKNOWNHOST; | |
2546388c JH |
4230 | addr->message = string_sprintf( |
4231 | rc == HOST_FIND_SECURITY | |
4232 | ? "lookup of IP address for %s was insecure" | |
4233 | : "failed to lookup IP address for %s", | |
4234 | host->name); | |
0756eb3c PH |
4235 | } |
4236 | continue; | |
4237 | } | |
4238 | ||
4239 | /* If the host is actually the local host, we may have a problem, or | |
4240 | there may be some cunning configuration going on. In the problem case, | |
4241 | log things and give up. The default transport status is already DEFER. */ | |
4242 | ||
4243 | if (rc == HOST_FOUND_LOCAL && !ob->allow_localhost) | |
4244 | { | |
7b4c8c1f | 4245 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4246 | { |
4247 | addr->basic_errno = 0; | |
4248 | addr->message = string_sprintf("%s transport found host %s to be " | |
4249 | "local", tblock->name, host->name); | |
4250 | } | |
4251 | goto END_TRANSPORT; | |
4252 | } | |
4253 | } /* End of block for IP address lookup */ | |
4254 | ||
4255 | /* If this is a continued delivery, we are interested only in the host | |
4256 | which matches the name of the existing open channel. The check is put | |
4257 | here after the local host lookup, in case the name gets expanded as a | |
4258 | result of the lookup. Set expired FALSE, to save the outer loop executing | |
4259 | twice. */ | |
4260 | ||
2577f55f JH |
4261 | if (continue_hostname) |
4262 | if ( Ustrcmp(continue_hostname, host->name) != 0 | |
4263 | || Ustrcmp(continue_host_address, host->address) != 0 | |
4264 | ) | |
4265 | { | |
4266 | expired = FALSE; | |
4267 | continue; /* With next host */ | |
4268 | } | |
4269 | else | |
4270 | continue_host_tried = TRUE; | |
0756eb3c | 4271 | |
9c4e8f60 PH |
4272 | /* Reset the default next host in case a multihomed host whose addresses |
4273 | are not looked up till just above added to the host list. */ | |
83364d30 PH |
4274 | |
4275 | nexthost = host->next; | |
4276 | ||
0756eb3c PH |
4277 | /* If queue_smtp is set (-odqs or the first part of a 2-stage run), or the |
4278 | domain is in queue_smtp_domains, we don't actually want to attempt any | |
4279 | deliveries. When doing a queue run, queue_smtp_domains is always unset. If | |
4280 | there is a lookup defer in queue_smtp_domains, proceed as if the domain | |
4281 | were not in it. We don't want to hold up all SMTP deliveries! Except when | |
4282 | doing a two-stage queue run, don't do this if forcing. */ | |
4283 | ||
4284 | if ((!deliver_force || queue_2stage) && (queue_smtp || | |
55414b25 JH |
4285 | match_isinlist(addrlist->domain, |
4286 | (const uschar **)&queue_smtp_domains, 0, | |
cf39cf57 | 4287 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)) |
0756eb3c PH |
4288 | { |
4289 | expired = FALSE; | |
7b4c8c1f JH |
4290 | for (addr = addrlist; addr; addr = addr->next) |
4291 | if (addr->transport_return == DEFER) | |
4292 | addr->message = US"domain matches queue_smtp_domains, or -odqs set"; | |
0756eb3c PH |
4293 | continue; /* With next host */ |
4294 | } | |
4295 | ||
4296 | /* Count hosts being considered - purely for an intelligent comment | |
4297 | if none are usable. */ | |
4298 | ||
4299 | hosts_total++; | |
4300 | ||
4301 | /* Set $host and $host address now in case they are needed for the | |
4302 | interface expansion or the serialize_hosts check; they remain set if an | |
4303 | actual delivery happens. */ | |
4304 | ||
4305 | deliver_host = host->name; | |
4306 | deliver_host_address = host->address; | |
783b385f JH |
4307 | lookup_dnssec_authenticated = host->dnssec == DS_YES ? US"yes" |
4308 | : host->dnssec == DS_NO ? US"no" | |
4309 | : US""; | |
0756eb3c | 4310 | |
7cd1141b PH |
4311 | /* Set up a string for adding to the retry key if the port number is not |
4312 | the standard SMTP port. A host may have its own port setting that overrides | |
4313 | the default. */ | |
4314 | ||
7b4c8c1f | 4315 | pistring = string_sprintf(":%d", host->port == PORT_NONE |
a843a57e | 4316 | ? defport : host->port); |
7cd1141b PH |
4317 | if (Ustrcmp(pistring, ":25") == 0) pistring = US""; |
4318 | ||
0756eb3c | 4319 | /* Select IPv4 or IPv6, and choose an outgoing interface. If the interface |
6f6dedcc JH |
4320 | string is set, even if constant (as different transports can have different |
4321 | constant settings), we must add it to the key that is used for retries, | |
4322 | because connections to the same host from a different interface should be | |
4323 | treated separately. */ | |
0756eb3c | 4324 | |
7b4c8c1f | 4325 | host_af = Ustrchr(host->address, ':') == NULL ? AF_INET : AF_INET6; |
6f6dedcc JH |
4326 | if ((rs = ob->interface) && *rs) |
4327 | { | |
4328 | if (!smtp_get_interface(rs, host_af, addrlist, &interface, tid)) | |
4329 | return FALSE; | |
4330 | pistring = string_sprintf("%s/%s", pistring, interface); | |
4331 | } | |
0756eb3c PH |
4332 | |
4333 | /* The first time round the outer loop, check the status of the host by | |
4334 | inspecting the retry data. The second time round, we are interested only | |
4335 | in expired hosts that haven't been tried since this message arrived. */ | |
4336 | ||
4337 | if (cutoff_retry == 0) | |
4338 | { | |
9c695f6d | 4339 | BOOL incl_ip; |
0756eb3c | 4340 | /* Ensure the status of the address is set by checking retry data if |
9c695f6d | 4341 | necessary. There may be host-specific retry data (applicable to all |
0756eb3c PH |
4342 | messages) and also data for retries of a specific message at this host. |
4343 | If either of these retry records are actually read, the keys used are | |
4344 | returned to save recomputing them later. */ | |
4345 | ||
9c695f6d JH |
4346 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, |
4347 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4348 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4349 | continue; /* with next host */ | |
4350 | ||
0756eb3c | 4351 | host_is_expired = retry_check_address(addrlist->domain, host, pistring, |
9c695f6d | 4352 | incl_ip, &retry_host_key, &retry_message_key); |
0756eb3c | 4353 | |
875512a3 | 4354 | DEBUG(D_transport) debug_printf("%s [%s]%s retry-status = %s\n", host->name, |
0756eb3c PH |
4355 | (host->address == NULL)? US"" : host->address, pistring, |
4356 | (host->status == hstatus_usable)? "usable" : | |
4357 | (host->status == hstatus_unusable)? "unusable" : | |
4358 | (host->status == hstatus_unusable_expired)? "unusable (expired)" : "?"); | |
4359 | ||
4360 | /* Skip this address if not usable at this time, noting if it wasn't | |
4361 | actually expired, both locally and in the address. */ | |
4362 | ||
4363 | switch (host->status) | |
4364 | { | |
4365 | case hstatus_unusable: | |
7b4c8c1f JH |
4366 | expired = FALSE; |
4367 | setflag(addrlist, af_retry_skipped); | |
4368 | /* Fall through */ | |
0756eb3c PH |
4369 | |
4370 | case hstatus_unusable_expired: | |
7b4c8c1f JH |
4371 | switch (host->why) |
4372 | { | |
4373 | case hwhy_retry: hosts_retry++; break; | |
4374 | case hwhy_failed: hosts_fail++; break; | |
2546388c | 4375 | case hwhy_insecure: |
7b4c8c1f JH |
4376 | case hwhy_deferred: hosts_defer++; break; |
4377 | } | |
4378 | ||
4379 | /* If there was a retry message key, implying that previously there | |
4380 | was a message-specific defer, we don't want to update the list of | |
4381 | messages waiting for these hosts. */ | |
4382 | ||
4383 | if (retry_message_key) update_waiting = FALSE; | |
4384 | continue; /* With the next host or IP address */ | |
0756eb3c PH |
4385 | } |
4386 | } | |
4387 | ||
4388 | /* Second time round the loop: if the address is set but expired, and | |
4389 | the message is newer than the last try, let it through. */ | |
4390 | ||
4391 | else | |
4392 | { | |
7b4c8c1f JH |
4393 | if ( !host->address |
4394 | || host->status != hstatus_unusable_expired | |
32dfdf8b | 4395 | || host->last_try > received_time.tv_sec) |
0756eb3c | 4396 | continue; |
7b4c8c1f | 4397 | DEBUG(D_transport) debug_printf("trying expired host %s [%s]%s\n", |
0756eb3c PH |
4398 | host->name, host->address, pistring); |
4399 | host_is_expired = TRUE; | |
4400 | } | |
4401 | ||
4402 | /* Setting "expired=FALSE" doesn't actually mean not all hosts are expired; | |
4403 | it remains TRUE only if all hosts are expired and none are actually tried. | |
4404 | */ | |
4405 | ||
4406 | expired = FALSE; | |
4407 | ||
4408 | /* If this host is listed as one to which access must be serialized, | |
4409 | see if another Exim process has a connection to it, and if so, skip | |
4410 | this host. If not, update the database to record our connection to it | |
4411 | and remember this for later deletion. Do not do any of this if we are | |
4412 | sending the message down a pre-existing connection. */ | |
4413 | ||
7b4c8c1f JH |
4414 | if ( !continue_hostname |
4415 | && verify_check_given_host(&ob->serialize_hosts, host) == OK) | |
0756eb3c PH |
4416 | { |
4417 | serialize_key = string_sprintf("host-serialize-%s", host->name); | |
e8ae7214 | 4418 | if (!enq_start(serialize_key, 1)) |
0756eb3c PH |
4419 | { |
4420 | DEBUG(D_transport) | |
4421 | debug_printf("skipping host %s because another Exim process " | |
4422 | "is connected to it\n", host->name); | |
4423 | hosts_serial++; | |
4424 | continue; | |
4425 | } | |
0756eb3c PH |
4426 | } |
4427 | ||
4428 | /* OK, we have an IP address that is not waiting for its retry time to | |
4429 | arrive (it might be expired) OR (second time round the loop) we have an | |
4430 | expired host that hasn't been tried since the message arrived. Have a go | |
4431 | at delivering the message to it. First prepare the addresses by flushing | |
4432 | out the result of previous attempts, and finding the first address that | |
4433 | is still to be delivered. */ | |
4434 | ||
4435 | first_addr = prepare_addresses(addrlist, host); | |
4436 | ||
4437 | DEBUG(D_transport) debug_printf("delivering %s to %s [%s] (%s%s)\n", | |
4438 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4439 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
4440 | |
4441 | set_process_info("delivering %s to %s [%s] (%s%s)", | |
4442 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4443 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
4444 | |
4445 | /* This is not for real; don't do the delivery. If there are | |
4446 | any remaining hosts, list them. */ | |
4447 | ||
4448 | if (dont_deliver) | |
4449 | { | |
4450 | host_item *host2; | |
895fbaf2 | 4451 | set_errno_nohost(addrlist, 0, NULL, OK, FALSE); |
7b4c8c1f | 4452 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4453 | { |
4454 | addr->host_used = host; | |
4455 | addr->special_action = '*'; | |
4456 | addr->message = US"delivery bypassed by -N option"; | |
4457 | } | |
4458 | DEBUG(D_transport) | |
4459 | { | |
4460 | debug_printf("*** delivery by %s transport bypassed by -N option\n" | |
4461 | "*** host and remaining hosts:\n", tblock->name); | |
7b4c8c1f | 4462 | for (host2 = host; host2; host2 = host2->next) |
0756eb3c | 4463 | debug_printf(" %s [%s]\n", host2->name, |
7b4c8c1f | 4464 | host2->address ? host2->address : US"unset"); |
0756eb3c PH |
4465 | } |
4466 | rc = OK; | |
4467 | } | |
4468 | ||
4469 | /* This is for real. If the host is expired, we don't count it for | |
4470 | hosts_max_retry. This ensures that all hosts must expire before an address | |
8e669ac1 | 4471 | is timed out, unless hosts_max_try_hardlimit (which protects against |
533244af | 4472 | lunatic DNS configurations) is reached. |
8e669ac1 | 4473 | |
533244af PH |
4474 | If the host is not expired and we are about to hit the hosts_max_retry |
4475 | limit, check to see if there is a subsequent hosts with a different MX | |
4476 | value. If so, make that the next host, and don't count this one. This is a | |
4477 | heuristic to make sure that different MXs do get tried. With a normal kind | |
4478 | of retry rule, they would get tried anyway when the earlier hosts were | |
4479 | delayed, but if the domain has a "retry every time" type of rule - as is | |
4480 | often used for the the very large ISPs, that won't happen. */ | |
0756eb3c PH |
4481 | |
4482 | else | |
4483 | { | |
d427a7f9 JH |
4484 | host_item * thost; |
4485 | /* Make a copy of the host if it is local to this invocation | |
4486 | of the transport. */ | |
4487 | ||
4488 | if (expanded_hosts) | |
4489 | { | |
4490 | thost = store_get(sizeof(host_item)); | |
4491 | *thost = *host; | |
4492 | thost->name = string_copy(host->name); | |
4493 | thost->address = string_copy(host->address); | |
4494 | } | |
4495 | else | |
4496 | thost = host; | |
4497 | ||
0756eb3c PH |
4498 | if (!host_is_expired && ++unexpired_hosts_tried >= ob->hosts_max_try) |
4499 | { | |
4500 | host_item *h; | |
4501 | DEBUG(D_transport) | |
4502 | debug_printf("hosts_max_try limit reached with this host\n"); | |
1a47b633 JH |
4503 | for (h = host; h; h = h->next) if (h->mx != host->mx) |
4504 | { | |
4505 | nexthost = h; | |
4506 | unexpired_hosts_tried--; | |
4507 | DEBUG(D_transport) debug_printf("however, a higher MX host exists " | |
4508 | "and will be tried\n"); | |
4509 | break; | |
4510 | } | |
0756eb3c PH |
4511 | } |
4512 | ||
4513 | /* Attempt the delivery. */ | |
4514 | ||
533244af | 4515 | total_hosts_tried++; |
a843a57e | 4516 | rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock, |
d427a7f9 | 4517 | &message_defer, FALSE); |
0756eb3c PH |
4518 | |
4519 | /* Yield is one of: | |
4520 | OK => connection made, each address contains its result; | |
4521 | message_defer is set for message-specific defers (when all | |
4522 | recipients are marked defer) | |
4523 | DEFER => there was a non-message-specific delivery problem; | |
4524 | ERROR => there was a problem setting up the arguments for a filter, | |
4525 | or there was a problem with expanding added headers | |
4526 | */ | |
4527 | ||
4528 | /* If the result is not OK, there was a non-message-specific problem. | |
4529 | If the result is DEFER, we need to write to the logs saying what happened | |
4530 | for this particular host, except in the case of authentication and TLS | |
4531 | failures, where the log has already been written. If all hosts defer a | |
4532 | general message is written at the end. */ | |
4533 | ||
7b4c8c1f JH |
4534 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL |
4535 | && first_addr->basic_errno != ERRNO_TLSFAILURE) | |
ec62d0a9 | 4536 | write_logs(host, first_addr->message, first_addr->basic_errno); |
0756eb3c | 4537 | |
0cbf2b82 | 4538 | #ifndef DISABLE_EVENT |
d68218c7 | 4539 | if (rc == DEFER) |
774ef2d7 | 4540 | deferred_event_raise(first_addr, host); |
a7538db1 | 4541 | #endif |
d68218c7 | 4542 | |
0756eb3c PH |
4543 | /* If STARTTLS was accepted, but there was a failure in setting up the |
4544 | TLS session (usually a certificate screwup), and the host is not in | |
4545 | hosts_require_tls, and tls_tempfail_tryclear is true, try again, with | |
4546 | TLS forcibly turned off. We have to start from scratch with a new SMTP | |
4547 | connection. That's why the retry is done from here, not from within | |
4548 | smtp_deliver(). [Rejections of STARTTLS itself don't screw up the | |
4549 | session, so the in-clear transmission after those errors, if permitted, | |
4550 | happens inside smtp_deliver().] */ | |
4551 | ||
a7538db1 | 4552 | #ifdef SUPPORT_TLS |
7a31d643 JH |
4553 | if ( rc == DEFER |
4554 | && first_addr->basic_errno == ERRNO_TLSFAILURE | |
4555 | && ob->tls_tempfail_tryclear | |
5130845b | 4556 | && verify_check_given_host(&ob->hosts_require_tls, host) != OK |
7a31d643 | 4557 | ) |
0756eb3c | 4558 | { |
cf0c6164 JH |
4559 | log_write(0, LOG_MAIN, |
4560 | "%s: delivering unencrypted to H=%s [%s] (not in hosts_require_tls)", | |
4561 | first_addr->message, host->name, host->address); | |
0756eb3c | 4562 | first_addr = prepare_addresses(addrlist, host); |
a843a57e | 4563 | rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock, |
d427a7f9 | 4564 | &message_defer, TRUE); |
0756eb3c | 4565 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL) |
ec62d0a9 | 4566 | write_logs(host, first_addr->message, first_addr->basic_errno); |
0cbf2b82 | 4567 | # ifndef DISABLE_EVENT |
d68218c7 | 4568 | if (rc == DEFER) |
774ef2d7 | 4569 | deferred_event_raise(first_addr, host); |
a7538db1 | 4570 | # endif |
0756eb3c | 4571 | } |
a1bccd48 | 4572 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
4573 | } |
4574 | ||
4575 | /* Delivery attempt finished */ | |
4576 | ||
7b4c8c1f JH |
4577 | rs = rc == OK ? US"OK" |
4578 | : rc == DEFER ? US"DEFER" | |
4579 | : rc == ERROR ? US"ERROR" | |
4580 | : US"?"; | |
0756eb3c PH |
4581 | |
4582 | set_process_info("delivering %s: just tried %s [%s] for %s%s: result %s", | |
4583 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4584 | addrlist->next ? " (& others)" : "", rs); |
0756eb3c PH |
4585 | |
4586 | /* Release serialization if set up */ | |
4587 | ||
7b4c8c1f | 4588 | if (serialize_key) enq_end(serialize_key); |
0756eb3c PH |
4589 | |
4590 | /* If the result is DEFER, or if a host retry record is known to exist, we | |
4591 | need to add an item to the retry chain for updating the retry database | |
4592 | at the end of delivery. We only need to add the item to the top address, | |
4593 | of course. Also, if DEFER, we mark the IP address unusable so as to skip it | |
4594 | for any other delivery attempts using the same address. (It is copied into | |
4595 | the unusable tree at the outer level, so even if different address blocks | |
4596 | contain the same address, it still won't get tried again.) */ | |
4597 | ||
7b4c8c1f | 4598 | if (rc == DEFER || retry_host_key) |
0756eb3c | 4599 | { |
7b4c8c1f JH |
4600 | int delete_flag = rc != DEFER ? rf_delete : 0; |
4601 | if (!retry_host_key) | |
0756eb3c | 4602 | { |
9c695f6d JH |
4603 | BOOL incl_ip; |
4604 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4605 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4606 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4607 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4608 | ||
7b4c8c1f JH |
4609 | retry_host_key = incl_ip |
4610 | ? string_sprintf("T:%S:%s%s", host->name, host->address, pistring) | |
4611 | : string_sprintf("T:%S%s", host->name, pistring); | |
0756eb3c PH |
4612 | } |
4613 | ||
4614 | /* If a delivery of another message over an existing SMTP connection | |
4615 | yields DEFER, we do NOT set up retry data for the host. This covers the | |
4616 | case when there are delays in routing the addresses in the second message | |
4617 | that are so long that the server times out. This is alleviated by not | |
4618 | routing addresses that previously had routing defers when handling an | |
4619 | existing connection, but even so, this case may occur (e.g. if a | |
4620 | previously happily routed address starts giving routing defers). If the | |
4621 | host is genuinely down, another non-continued message delivery will | |
4622 | notice it soon enough. */ | |
4623 | ||
7b4c8c1f | 4624 | if (delete_flag != 0 || !continue_hostname) |
0756eb3c PH |
4625 | retry_add_item(first_addr, retry_host_key, rf_host | delete_flag); |
4626 | ||
4627 | /* We may have tried an expired host, if its retry time has come; ensure | |
4628 | the status reflects the expiry for the benefit of any other addresses. */ | |
4629 | ||
4630 | if (rc == DEFER) | |
4631 | { | |
7b4c8c1f JH |
4632 | host->status = host_is_expired |
4633 | ? hstatus_unusable_expired : hstatus_unusable; | |
0756eb3c PH |
4634 | host->why = hwhy_deferred; |
4635 | } | |
4636 | } | |
4637 | ||
4638 | /* If message_defer is set (host was OK, but every recipient got deferred | |
4639 | because of some message-specific problem), or if that had happened | |
4640 | previously so that a message retry key exists, add an appropriate item | |
4641 | to the retry chain. Note that if there was a message defer but now there is | |
4642 | a host defer, the message defer record gets deleted. That seems perfectly | |
4643 | reasonable. Also, stop the message from being remembered as waiting | |
f6c332bd | 4644 | for specific hosts. */ |
0756eb3c | 4645 | |
7b4c8c1f | 4646 | if (message_defer || retry_message_key) |
0756eb3c | 4647 | { |
7b4c8c1f JH |
4648 | int delete_flag = message_defer ? 0 : rf_delete; |
4649 | if (!retry_message_key) | |
0756eb3c | 4650 | { |
9c695f6d JH |
4651 | BOOL incl_ip; |
4652 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4653 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4654 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4655 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4656 | ||
7b4c8c1f JH |
4657 | retry_message_key = incl_ip |
4658 | ? string_sprintf("T:%S:%s%s:%s", host->name, host->address, pistring, | |
4659 | message_id) | |
4660 | : string_sprintf("T:%S%s:%s", host->name, pistring, message_id); | |
0756eb3c PH |
4661 | } |
4662 | retry_add_item(addrlist, retry_message_key, | |
4663 | rf_message | rf_host | delete_flag); | |
f6c332bd | 4664 | update_waiting = FALSE; |
0756eb3c PH |
4665 | } |
4666 | ||
4667 | /* Any return other than DEFER (that is, OK or ERROR) means that the | |
4668 | addresses have got their final statuses filled in for this host. In the OK | |
4669 | case, see if any of them are deferred. */ | |
4670 | ||
4671 | if (rc == OK) | |
4cea764f | 4672 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4673 | if (addr->transport_return == DEFER) |
4674 | { | |
4675 | some_deferred = TRUE; | |
4676 | break; | |
4677 | } | |
0756eb3c PH |
4678 | |
4679 | /* If no addresses deferred or the result was ERROR, return. We do this for | |
4680 | ERROR because a failing filter set-up or add_headers expansion is likely to | |
4681 | fail for any host we try. */ | |
4682 | ||
4683 | if (rc == ERROR || (rc == OK && !some_deferred)) | |
4684 | { | |
4685 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4686 | return TRUE; /* Each address has its status */ | |
4687 | } | |
4688 | ||
4689 | /* If the result was DEFER or some individual addresses deferred, let | |
4690 | the loop run to try other hosts with the deferred addresses, except for the | |
4691 | case when we were trying to deliver down an existing channel and failed. | |
4692 | Don't try any other hosts in this case. */ | |
4693 | ||
7b4c8c1f | 4694 | if (continue_hostname) break; |
0756eb3c PH |
4695 | |
4696 | /* If the whole delivery, or some individual addresses, were deferred and | |
4697 | there are more hosts that could be tried, do not count this host towards | |
4698 | the hosts_max_try limit if the age of the message is greater than the | |
4699 | maximum retry time for this host. This means we may try try all hosts, | |
4700 | ignoring the limit, when messages have been around for some time. This is | |
4701 | important because if we don't try all hosts, the address will never time | |
533244af | 4702 | out. NOTE: this does not apply to hosts_max_try_hardlimit. */ |
0756eb3c | 4703 | |
7b4c8c1f | 4704 | if ((rc == DEFER || some_deferred) && nexthost) |
0756eb3c PH |
4705 | { |
4706 | BOOL timedout; | |
4707 | retry_config *retry = retry_find_config(host->name, NULL, 0, 0); | |
4708 | ||
7b4c8c1f | 4709 | if (retry && retry->rules) |
0756eb3c PH |
4710 | { |
4711 | retry_rule *last_rule; | |
4712 | for (last_rule = retry->rules; | |
7b4c8c1f | 4713 | last_rule->next; |
0756eb3c | 4714 | last_rule = last_rule->next); |
32dfdf8b | 4715 | timedout = time(NULL) - received_time.tv_sec > last_rule->timeout; |
0756eb3c PH |
4716 | } |
4717 | else timedout = TRUE; /* No rule => timed out */ | |
4718 | ||
4719 | if (timedout) | |
4720 | { | |
4721 | unexpired_hosts_tried--; | |
4722 | DEBUG(D_transport) debug_printf("temporary delivery error(s) override " | |
4723 | "hosts_max_try (message older than host's retry time)\n"); | |
4724 | } | |
4725 | } | |
4726 | } /* End of loop for trying multiple hosts. */ | |
4727 | ||
2577f55f JH |
4728 | /* If we failed to find a matching host in the list, for an already-open |
4729 | connection, just close it and start over with the list. This can happen | |
4730 | for routing that changes from run to run, or big multi-IP sites with | |
4731 | round-robin DNS. */ | |
4732 | ||
4733 | if (continue_hostname && !continue_host_tried) | |
4734 | { | |
74f1a423 | 4735 | int fd = cutthrough.cctx.sock >= 0 ? cutthrough.cctx.sock : 0; |
2577f55f JH |
4736 | |
4737 | DEBUG(D_transport) debug_printf("no hosts match already-open connection\n"); | |
4738 | #ifdef SUPPORT_TLS | |
74f1a423 JH |
4739 | /* A TLS conn could be open for a cutthrough, but not for a plain continued- |
4740 | transport */ | |
4741 | /*XXX doublecheck that! */ | |
4742 | ||
4743 | if (cutthrough.cctx.sock >= 0 && cutthrough.is_tls) | |
2577f55f | 4744 | { |
74f1a423 JH |
4745 | (void) tls_write(cutthrough.cctx.tls_ctx, US"QUIT\r\n", 6, FALSE); |
4746 | tls_close(cutthrough.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); | |
4747 | cutthrough.cctx.tls_ctx = NULL; | |
4748 | cutthrough.is_tls = FALSE; | |
2577f55f JH |
4749 | } |
4750 | else | |
4751 | #else | |
4752 | (void) write(fd, US"QUIT\r\n", 6); | |
4753 | #endif | |
4754 | (void) close(fd); | |
74f1a423 | 4755 | cutthrough.cctx.sock = -1; |
2577f55f JH |
4756 | continue_hostname = NULL; |
4757 | goto retry_non_continued; | |
4758 | } | |
4759 | ||
0756eb3c PH |
4760 | /* This is the end of the loop that repeats iff expired is TRUE and |
4761 | ob->delay_after_cutoff is FALSE. The second time round we will | |
4762 | try those hosts that haven't been tried since the message arrived. */ | |
4763 | ||
4764 | DEBUG(D_transport) | |
4765 | { | |
4766 | debug_printf("all IP addresses skipped or deferred at least one address\n"); | |
4767 | if (expired && !ob->delay_after_cutoff && cutoff_retry == 0) | |
4768 | debug_printf("retrying IP addresses not tried since message arrived\n"); | |
4769 | } | |
4770 | } | |
4771 | ||
4772 | ||
4773 | /* Get here if all IP addresses are skipped or defer at least one address. In | |
4774 | MUA wrapper mode, this will happen only for connection or other non-message- | |
4775 | specific failures. Force the delivery status for all addresses to FAIL. */ | |
4776 | ||
4777 | if (mua_wrapper) | |
4778 | { | |
7b4c8c1f | 4779 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4780 | addr->transport_return = FAIL; |
4781 | goto END_TRANSPORT; | |
4782 | } | |
4783 | ||
4784 | /* In the normal, non-wrapper case, add a standard message to each deferred | |
4785 | address if there hasn't been an error, that is, if it hasn't actually been | |
4786 | tried this time. The variable "expired" will be FALSE if any deliveries were | |
4787 | actually tried, or if there was at least one host that was not expired. That | |
4788 | is, it is TRUE only if no deliveries were tried and all hosts were expired. If | |
4789 | a delivery has been tried, an error code will be set, and the failing of the | |
4790 | message is handled by the retry code later. | |
4791 | ||
4792 | If queue_smtp is set, or this transport was called to send a subsequent message | |
4793 | down an existing TCP/IP connection, and something caused the host not to be | |
4794 | found, we end up here, but can detect these cases and handle them specially. */ | |
4795 | ||
c3f2eb9a | 4796 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4797 | { |
4798 | /* If host is not NULL, it means that we stopped processing the host list | |
533244af PH |
4799 | because of hosts_max_try or hosts_max_try_hardlimit. In the former case, this |
4800 | means we need to behave as if some hosts were skipped because their retry | |
4801 | time had not come. Specifically, this prevents the address from timing out. | |
8e669ac1 | 4802 | However, if we have hit hosts_max_try_hardlimit, we want to behave as if all |
533244af | 4803 | hosts were tried. */ |
0756eb3c | 4804 | |
c3f2eb9a | 4805 | if (host) |
533244af PH |
4806 | if (total_hosts_tried >= ob->hosts_max_try_hardlimit) |
4807 | { | |
4808 | DEBUG(D_transport) | |
4809 | debug_printf("hosts_max_try_hardlimit reached: behave as if all " | |
4810 | "hosts were tried\n"); | |
4811 | } | |
4812 | else | |
8e669ac1 | 4813 | { |
533244af PH |
4814 | DEBUG(D_transport) |
4815 | debug_printf("hosts_max_try limit caused some hosts to be skipped\n"); | |
4816 | setflag(addr, af_retry_skipped); | |
8e669ac1 | 4817 | } |
0756eb3c PH |
4818 | |
4819 | if (queue_smtp) /* no deliveries attempted */ | |
4820 | { | |
4821 | addr->transport_return = DEFER; | |
4822 | addr->basic_errno = 0; | |
4823 | addr->message = US"SMTP delivery explicitly queued"; | |
4824 | } | |
4825 | ||
c3f2eb9a JH |
4826 | else if ( addr->transport_return == DEFER |
4827 | && (addr->basic_errno == ERRNO_UNKNOWNERROR || addr->basic_errno == 0) | |
4828 | && !addr->message | |
4829 | ) | |
0756eb3c PH |
4830 | { |
4831 | addr->basic_errno = ERRNO_HRETRY; | |
c3f2eb9a | 4832 | if (continue_hostname) |
0756eb3c | 4833 | addr->message = US"no host found for existing SMTP connection"; |
0756eb3c PH |
4834 | else if (expired) |
4835 | { | |
fffffe4c | 4836 | setflag(addr, af_pass_message); /* This is not a security risk */ |
c3f2eb9a JH |
4837 | addr->message = string_sprintf( |
4838 | "all hosts%s have been failing for a long time %s", | |
4839 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US"", | |
4840 | ob->delay_after_cutoff | |
4841 | ? US"(and retry time not reached)" | |
4842 | : US"and were last tried after this message arrived"); | |
0756eb3c PH |
4843 | |
4844 | /* If we are already using fallback hosts, or there are no fallback hosts | |
4845 | defined, convert the result to FAIL to cause a bounce. */ | |
4846 | ||
c3f2eb9a | 4847 | if (addr->host_list == addr->fallback_hosts || !addr->fallback_hosts) |
0756eb3c PH |
4848 | addr->transport_return = FAIL; |
4849 | } | |
4850 | else | |
4851 | { | |
93a680e4 | 4852 | const char * s; |
0756eb3c | 4853 | if (hosts_retry == hosts_total) |
93a680e4 | 4854 | s = "retry time not reached for any host%s"; |
0756eb3c | 4855 | else if (hosts_fail == hosts_total) |
93a680e4 | 4856 | s = "all host address lookups%s failed permanently"; |
0756eb3c | 4857 | else if (hosts_defer == hosts_total) |
93a680e4 | 4858 | s = "all host address lookups%s failed temporarily"; |
0756eb3c | 4859 | else if (hosts_serial == hosts_total) |
93a680e4 | 4860 | s = "connection limit reached for all hosts%s"; |
0756eb3c | 4861 | else if (hosts_fail+hosts_defer == hosts_total) |
93a680e4 | 4862 | s = "all host address lookups%s failed"; |
3cf01803 | 4863 | else |
93a680e4 | 4864 | s = "some host address lookups failed and retry time " |
3cf01803 JH |
4865 | "not reached for other hosts or connection limit reached%s"; |
4866 | ||
4867 | addr->message = string_sprintf(s, | |
4868 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US""); | |
0756eb3c PH |
4869 | } |
4870 | } | |
4871 | } | |
4872 | ||
4873 | /* Update the database which keeps information about which messages are waiting | |
f6c332bd PH |
4874 | for which hosts to become available. For some message-specific errors, the |
4875 | update_waiting flag is turned off because we don't want follow-on deliveries in | |
ea722490 | 4876 | those cases. If this transport instance is explicitly limited to one message |
8b260705 PP |
4877 | per connection then follow-on deliveries are not possible and there's no need |
4878 | to create/update the per-transport wait-<transport_name> database. */ | |
0756eb3c | 4879 | |
ea722490 JH |
4880 | if (update_waiting && tblock->connection_max_messages != 1) |
4881 | transport_update_waiting(hostlist, tblock->name); | |
0756eb3c PH |
4882 | |
4883 | END_TRANSPORT: | |
4884 | ||
4885 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4886 | ||
4887 | return TRUE; /* Each address has its status */ | |
4888 | } | |
4889 | ||
d185889f | 4890 | #endif /*!MACRO_PREDEF*/ |
578897ea JH |
4891 | /* vi: aw ai sw=2 |
4892 | */ | |
0756eb3c | 4893 | /* End of transport/smtp.c */ |