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) }, | |
ee8b8090 JH |
109 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
110 | { "hosts_pipe_connect", opt_stringptr, | |
111 | (void *)offsetof(smtp_transport_options_block, hosts_pipe_connect) }, | |
112 | #endif | |
0756eb3c PH |
113 | { "hosts_randomize", opt_bool, |
114 | (void *)offsetof(smtp_transport_options_block, hosts_randomize) }, | |
f2de3a33 | 115 | #if defined(SUPPORT_TLS) && !defined(DISABLE_OCSP) |
44662487 JH |
116 | { "hosts_request_ocsp", opt_stringptr, |
117 | (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) }, | |
118 | #endif | |
0756eb3c PH |
119 | { "hosts_require_auth", opt_stringptr, |
120 | (void *)offsetof(smtp_transport_options_block, hosts_require_auth) }, | |
80a47a2c | 121 | #ifdef SUPPORT_TLS |
c0635b6d | 122 | # ifdef SUPPORT_DANE |
7a31d643 JH |
123 | { "hosts_require_dane", opt_stringptr, |
124 | (void *)offsetof(smtp_transport_options_block, hosts_require_dane) }, | |
125 | # endif | |
f2de3a33 | 126 | # ifndef DISABLE_OCSP |
f5d78688 JH |
127 | { "hosts_require_ocsp", opt_stringptr, |
128 | (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) }, | |
129 | # endif | |
0756eb3c PH |
130 | { "hosts_require_tls", opt_stringptr, |
131 | (void *)offsetof(smtp_transport_options_block, hosts_require_tls) }, | |
80a47a2c | 132 | #endif |
0756eb3c PH |
133 | { "hosts_try_auth", opt_stringptr, |
134 | (void *)offsetof(smtp_transport_options_block, hosts_try_auth) }, | |
f98442df JH |
135 | { "hosts_try_chunking", opt_stringptr, |
136 | (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) }, | |
c0635b6d | 137 | #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE) |
96e47838 TL |
138 | { "hosts_try_dane", opt_stringptr, |
139 | (void *)offsetof(smtp_transport_options_block, hosts_try_dane) }, | |
140 | #endif | |
fb05276a JH |
141 | { "hosts_try_fastopen", opt_stringptr, |
142 | (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) }, | |
8ccd00b1 | 143 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
144 | { "hosts_try_prdr", opt_stringptr, |
145 | (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) }, | |
146 | #endif | |
99400968 JH |
147 | #ifdef SUPPORT_TLS |
148 | { "hosts_verify_avoid_tls", opt_stringptr, | |
149 | (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) }, | |
150 | #endif | |
0756eb3c PH |
151 | { "interface", opt_stringptr, |
152 | (void *)offsetof(smtp_transport_options_block, interface) }, | |
153 | { "keepalive", opt_bool, | |
154 | (void *)offsetof(smtp_transport_options_block, keepalive) }, | |
f1513293 PH |
155 | { "lmtp_ignore_quota", opt_bool, |
156 | (void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) }, | |
0756eb3c PH |
157 | { "max_rcpt", opt_int | opt_public, |
158 | (void *)offsetof(transport_instance, max_addresses) }, | |
506900af | 159 | { "multi_domain", opt_expand_bool | opt_public, |
0756eb3c PH |
160 | (void *)offsetof(transport_instance, multi_domain) }, |
161 | { "port", opt_stringptr, | |
162 | (void *)offsetof(smtp_transport_options_block, port) }, | |
163 | { "protocol", opt_stringptr, | |
164 | (void *)offsetof(smtp_transport_options_block, protocol) }, | |
9c695f6d | 165 | { "retry_include_ip_address", opt_expand_bool, |
0756eb3c PH |
166 | (void *)offsetof(smtp_transport_options_block, retry_include_ip_address) }, |
167 | { "serialize_hosts", opt_stringptr, | |
168 | (void *)offsetof(smtp_transport_options_block, serialize_hosts) }, | |
169 | { "size_addition", opt_int, | |
1ddf77d0 | 170 | (void *)offsetof(smtp_transport_options_block, size_addition) }, |
f0989ec0 | 171 | #ifdef SUPPORT_SOCKS |
1ddf77d0 JH |
172 | { "socks_proxy", opt_stringptr, |
173 | (void *)offsetof(smtp_transport_options_block, socks_proxy) }, | |
7eb6c37c | 174 | #endif |
80a47a2c | 175 | #ifdef SUPPORT_TLS |
1ddf77d0 | 176 | { "tls_certificate", opt_stringptr, |
0756eb3c PH |
177 | (void *)offsetof(smtp_transport_options_block, tls_certificate) }, |
178 | { "tls_crl", opt_stringptr, | |
179 | (void *)offsetof(smtp_transport_options_block, tls_crl) }, | |
54c90be1 PP |
180 | { "tls_dh_min_bits", opt_int, |
181 | (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) }, | |
0756eb3c PH |
182 | { "tls_privatekey", opt_stringptr, |
183 | (void *)offsetof(smtp_transport_options_block, tls_privatekey) }, | |
3f0945ff | 184 | { "tls_require_ciphers", opt_stringptr, |
0756eb3c | 185 | (void *)offsetof(smtp_transport_options_block, tls_require_ciphers) }, |
3f0945ff PP |
186 | { "tls_sni", opt_stringptr, |
187 | (void *)offsetof(smtp_transport_options_block, tls_sni) }, | |
0756eb3c PH |
188 | { "tls_tempfail_tryclear", opt_bool, |
189 | (void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) }, | |
a63be306 WB |
190 | { "tls_try_verify_hosts", opt_stringptr, |
191 | (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) }, | |
e51c7be2 JH |
192 | { "tls_verify_cert_hostnames", opt_stringptr, |
193 | (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)}, | |
0756eb3c | 194 | { "tls_verify_certificates", opt_stringptr, |
a63be306 WB |
195 | (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) }, |
196 | { "tls_verify_hosts", opt_stringptr, | |
71c15846 JH |
197 | (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) }, |
198 | #endif | |
199 | #ifdef SUPPORT_I18N | |
200 | { "utf8_downconvert", opt_stringptr, | |
201 | (void *)offsetof(smtp_transport_options_block, utf8_downconvert) }, | |
80a47a2c | 202 | #endif |
0756eb3c PH |
203 | }; |
204 | ||
205 | /* Size of the options list. An extern variable has to be used so that its | |
206 | address can appear in the tables drtables.c. */ | |
207 | ||
71c15846 | 208 | int smtp_transport_options_count = nelem(smtp_transport_options); |
0756eb3c | 209 | |
d185889f JH |
210 | |
211 | #ifdef MACRO_PREDEF | |
212 | ||
213 | /* Dummy values */ | |
214 | smtp_transport_options_block smtp_transport_option_defaults = {0}; | |
215 | void smtp_transport_init(transport_instance *tblock) {} | |
216 | BOOL smtp_transport_entry(transport_instance *tblock, address_item *addr) {return FALSE;} | |
217 | void smtp_transport_closedown(transport_instance *tblock) {} | |
218 | ||
219 | #else /*!MACRO_PREDEF*/ | |
220 | ||
221 | ||
0756eb3c PH |
222 | /* Default private options block for the smtp transport. */ |
223 | ||
224 | smtp_transport_options_block smtp_transport_option_defaults = { | |
838d897c | 225 | .hosts = NULL, |
847cd15f | 226 | .fallback_hosts = NULL, |
838d897c JH |
227 | .hostlist = NULL, |
228 | .fallback_hostlist = NULL, | |
838d897c JH |
229 | .helo_data = US"$primary_hostname", |
230 | .interface = NULL, | |
231 | .port = NULL, | |
232 | .protocol = US"smtp", | |
233 | .dscp = NULL, | |
234 | .serialize_hosts = NULL, | |
235 | .hosts_try_auth = NULL, | |
236 | .hosts_require_auth = NULL, | |
237 | .hosts_try_chunking = US"*", | |
c0635b6d | 238 | #ifdef SUPPORT_DANE |
838d897c JH |
239 | .hosts_try_dane = NULL, |
240 | .hosts_require_dane = NULL, | |
5ec37a55 | 241 | .dane_require_tls_ciphers = NULL, |
96e47838 | 242 | #endif |
838d897c | 243 | .hosts_try_fastopen = NULL, |
8ccd00b1 | 244 | #ifndef DISABLE_PRDR |
838d897c | 245 | .hosts_try_prdr = US"*", |
f5d78688 | 246 | #endif |
f2de3a33 | 247 | #ifndef DISABLE_OCSP |
838d897c JH |
248 | .hosts_request_ocsp = US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */ |
249 | .hosts_require_ocsp = NULL, | |
fd98a5c6 | 250 | #endif |
838d897c JH |
251 | .hosts_require_tls = NULL, |
252 | .hosts_avoid_tls = NULL, | |
253 | .hosts_verify_avoid_tls = NULL, | |
254 | .hosts_avoid_pipelining = NULL, | |
ee8b8090 JH |
255 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
256 | .hosts_pipe_connect = NULL, | |
257 | #endif | |
838d897c | 258 | .hosts_avoid_esmtp = NULL, |
57cc2785 | 259 | #ifdef SUPPORT_TLS |
838d897c JH |
260 | .hosts_nopass_tls = NULL, |
261 | .hosts_noproxy_tls = US"*", | |
57cc2785 | 262 | #endif |
838d897c JH |
263 | .command_timeout = 5*60, |
264 | .connect_timeout = 5*60, | |
265 | .data_timeout = 5*60, | |
266 | .final_timeout = 10*60, | |
267 | .size_addition = 1024, | |
268 | .hosts_max_try = 5, | |
269 | .hosts_max_try_hardlimit = 50, | |
270 | .address_retry_include_sender = TRUE, | |
271 | .allow_localhost = FALSE, | |
272 | .authenticated_sender_force = FALSE, | |
273 | .gethostbyname = FALSE, | |
274 | .dns_qualify_single = TRUE, | |
275 | .dns_search_parents = FALSE, | |
276 | .dnssec = { .request=NULL, .require=NULL }, | |
277 | .delay_after_cutoff = TRUE, | |
278 | .hosts_override = FALSE, | |
279 | .hosts_randomize = FALSE, | |
280 | .keepalive = TRUE, | |
281 | .lmtp_ignore_quota = FALSE, | |
282 | .expand_retry_include_ip_address = NULL, | |
283 | .retry_include_ip_address = TRUE, | |
f0989ec0 | 284 | #ifdef SUPPORT_SOCKS |
838d897c | 285 | .socks_proxy = NULL, |
b8bf753b | 286 | #endif |
80a47a2c | 287 | #ifdef SUPPORT_TLS |
838d897c JH |
288 | .tls_certificate = NULL, |
289 | .tls_crl = NULL, | |
290 | .tls_privatekey = NULL, | |
291 | .tls_require_ciphers = NULL, | |
292 | .tls_sni = NULL, | |
293 | .tls_verify_certificates = US"system", | |
294 | .tls_dh_min_bits = EXIM_CLIENT_DH_DEFAULT_MIN_BITS, | |
295 | .tls_tempfail_tryclear = TRUE, | |
296 | .tls_verify_hosts = NULL, | |
297 | .tls_try_verify_hosts = US"*", | |
298 | .tls_verify_cert_hostnames = US"*", | |
80a47a2c | 299 | #endif |
71c15846 JH |
300 | #ifdef SUPPORT_I18N |
301 | .utf8_downconvert = NULL, | |
302 | #endif | |
80a47a2c | 303 | #ifndef DISABLE_DKIM |
838d897c JH |
304 | .dkim = |
305 | {.dkim_domain = NULL, | |
7c6ec81b | 306 | .dkim_identity = NULL, |
838d897c JH |
307 | .dkim_private_key = NULL, |
308 | .dkim_selector = NULL, | |
309 | .dkim_canon = NULL, | |
7c6ec81b | 310 | .dkim_sign_headers = NULL, |
838d897c | 311 | .dkim_strict = NULL, |
d73e45df | 312 | .dkim_hash = US"sha256", |
2bc0f45e | 313 | .dkim_timestamps = NULL, |
617d3932 JH |
314 | .dot_stuffed = FALSE, |
315 | .force_bodyhash = FALSE, | |
316 | # ifdef EXPERIMENTAL_ARC | |
317 | .arc_signspec = NULL, | |
318 | # endif | |
319 | }, | |
320 | # ifdef EXPERIMENTAL_ARC | |
321 | .arc_sign = NULL, | |
322 | # endif | |
80a47a2c | 323 | #endif |
0756eb3c PH |
324 | }; |
325 | ||
6c1c3d1d WB |
326 | /* some DSN flags for use later */ |
327 | ||
328 | static int rf_list[] = {rf_notify_never, rf_notify_success, | |
329 | rf_notify_failure, rf_notify_delay }; | |
330 | ||
45500060 | 331 | static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" }; |
6c1c3d1d WB |
332 | |
333 | ||
0756eb3c PH |
334 | |
335 | /* Local statics */ | |
336 | ||
87cb4a16 JH |
337 | static uschar *smtp_command; /* Points to last cmd for error messages */ |
338 | static uschar *mail_command; /* Points to MAIL cmd for error messages */ | |
339 | static uschar *data_command = US""; /* Points to DATA cmd for error messages */ | |
340 | static BOOL update_waiting; /* TRUE to update the "wait" database */ | |
875512a3 JH |
341 | |
342 | /*XXX move to smtp_context */ | |
87cb4a16 | 343 | static BOOL pipelining_active; /* current transaction is in pipe mode */ |
0756eb3c PH |
344 | |
345 | ||
ee8b8090 JH |
346 | static unsigned ehlo_response(uschar * buf, unsigned checks); |
347 | ||
348 | ||
0756eb3c PH |
349 | /************************************************* |
350 | * Setup entry point * | |
351 | *************************************************/ | |
352 | ||
353 | /* This function is called when the transport is about to be used, | |
354 | but before running it in a sub-process. It is used for two things: | |
355 | ||
356 | (1) To set the fallback host list in addresses, when delivering. | |
26da7e20 PH |
357 | (2) To pass back the interface, port, protocol, and other options, for use |
358 | during callout verification. | |
0756eb3c PH |
359 | |
360 | Arguments: | |
361 | tblock pointer to the transport instance block | |
362 | addrlist list of addresses about to be transported | |
363 | tf if not NULL, pointer to block in which to return options | |
929ba01c PH |
364 | uid the uid that will be set (not used) |
365 | gid the gid that will be set (not used) | |
0756eb3c PH |
366 | errmsg place for error message (not used) |
367 | ||
368 | Returns: OK always (FAIL, DEFER not used) | |
369 | */ | |
370 | ||
371 | static int | |
372 | smtp_transport_setup(transport_instance *tblock, address_item *addrlist, | |
929ba01c | 373 | transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg) |
0756eb3c | 374 | { |
ee8b8090 | 375 | smtp_transport_options_block *ob = SOB tblock->options_block; |
0756eb3c PH |
376 | |
377 | errmsg = errmsg; /* Keep picky compilers happy */ | |
929ba01c PH |
378 | uid = uid; |
379 | gid = gid; | |
0756eb3c PH |
380 | |
381 | /* Pass back options if required. This interface is getting very messy. */ | |
382 | ||
02b41d71 | 383 | if (tf) |
0756eb3c PH |
384 | { |
385 | tf->interface = ob->interface; | |
386 | tf->port = ob->port; | |
387 | tf->protocol = ob->protocol; | |
388 | tf->hosts = ob->hosts; | |
389 | tf->hosts_override = ob->hosts_override; | |
390 | tf->hosts_randomize = ob->hosts_randomize; | |
391 | tf->gethostbyname = ob->gethostbyname; | |
392 | tf->qualify_single = ob->dns_qualify_single; | |
393 | tf->search_parents = ob->dns_search_parents; | |
26da7e20 | 394 | tf->helo_data = ob->helo_data; |
0756eb3c PH |
395 | } |
396 | ||
397 | /* Set the fallback host list for all the addresses that don't have fallback | |
398 | host lists, provided that the local host wasn't present in the original host | |
399 | list. */ | |
400 | ||
401 | if (!testflag(addrlist, af_local_host_removed)) | |
02b41d71 JH |
402 | for (; addrlist; addrlist = addrlist->next) |
403 | if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist; | |
0756eb3c PH |
404 | |
405 | return OK; | |
406 | } | |
407 | ||
408 | ||
409 | ||
410 | /************************************************* | |
411 | * Initialization entry point * | |
412 | *************************************************/ | |
413 | ||
414 | /* Called for each instance, after its options have been read, to | |
415 | enable consistency checks to be done, or anything else that needs | |
416 | to be set up. | |
417 | ||
418 | Argument: pointer to the transport instance block | |
419 | Returns: nothing | |
420 | */ | |
421 | ||
422 | void | |
423 | smtp_transport_init(transport_instance *tblock) | |
424 | { | |
ee8b8090 | 425 | smtp_transport_options_block *ob = SOB tblock->options_block; |
0756eb3c PH |
426 | |
427 | /* Retry_use_local_part defaults FALSE if unset */ | |
428 | ||
429 | if (tblock->retry_use_local_part == TRUE_UNSET) | |
430 | tblock->retry_use_local_part = FALSE; | |
431 | ||
432 | /* Set the default port according to the protocol */ | |
433 | ||
ee8b8090 JH |
434 | if (!ob->port) |
435 | ob->port = strcmpic(ob->protocol, US"lmtp") == 0 | |
436 | ? US"lmtp" | |
437 | : strcmpic(ob->protocol, US"smtps") == 0 | |
438 | ? US"smtps" : US"smtp"; | |
0756eb3c PH |
439 | |
440 | /* Set up the setup entry point, to be called before subprocesses for this | |
441 | transport. */ | |
442 | ||
443 | tblock->setup = smtp_transport_setup; | |
444 | ||
445 | /* Complain if any of the timeouts are zero. */ | |
446 | ||
447 | if (ob->command_timeout <= 0 || ob->data_timeout <= 0 || | |
448 | ob->final_timeout <= 0) | |
449 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
450 | "command, data, or final timeout value is zero for %s transport", | |
451 | tblock->name); | |
452 | ||
453 | /* If hosts_override is set and there are local hosts, set the global | |
454 | flag that stops verify from showing router hosts. */ | |
455 | ||
456 | if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE; | |
457 | ||
458 | /* If there are any fallback hosts listed, build a chain of host items | |
459 | for them, but do not do any lookups at this time. */ | |
460 | ||
461 | host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE); | |
462 | } | |
463 | ||
464 | ||
465 | ||
466 | ||
467 | ||
468 | /************************************************* | |
469 | * Set delivery info into all active addresses * | |
470 | *************************************************/ | |
471 | ||
472 | /* Only addresses whose status is >= PENDING are relevant. A lesser | |
473 | status means that an address is not currently being processed. | |
474 | ||
475 | Arguments: | |
447d236c PH |
476 | addrlist points to a chain of addresses |
477 | errno_value to put in each address's errno field | |
478 | msg to put in each address's message field | |
479 | rc to put in each address's transport_return field | |
480 | pass_message if TRUE, set the "pass message" flag in the address | |
c562fd30 | 481 | host if set, mark addrs as having used this host |
895fbaf2 JH |
482 | smtp_greeting from peer |
483 | helo_response from peer | |
0756eb3c PH |
484 | |
485 | If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in | |
486 | the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate | |
487 | this particular type of timeout. | |
488 | ||
489 | Returns: nothing | |
490 | */ | |
491 | ||
7cd1141b PH |
492 | static void |
493 | set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
895fbaf2 JH |
494 | BOOL pass_message, host_item * host |
495 | #ifdef EXPERIMENTAL_DSN_INFO | |
496 | , const uschar * smtp_greeting, const uschar * helo_response | |
497 | #endif | |
498 | ) | |
0756eb3c PH |
499 | { |
500 | address_item *addr; | |
501 | int orvalue = 0; | |
502 | if (errno_value == ERRNO_CONNECTTIMEOUT) | |
503 | { | |
504 | errno_value = ETIMEDOUT; | |
505 | orvalue = RTEF_CTOUT; | |
506 | } | |
895fbaf2 | 507 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b | 508 | if (addr->transport_return >= PENDING) |
447d236c | 509 | { |
168dec3b JH |
510 | addr->basic_errno = errno_value; |
511 | addr->more_errno |= orvalue; | |
02b41d71 | 512 | if (msg) |
168dec3b JH |
513 | { |
514 | addr->message = msg; | |
515 | if (pass_message) setflag(addr, af_pass_message); | |
516 | } | |
517 | addr->transport_return = rc; | |
518 | if (host) | |
895fbaf2 | 519 | { |
168dec3b | 520 | addr->host_used = host; |
895fbaf2 JH |
521 | #ifdef EXPERIMENTAL_DSN_INFO |
522 | if (smtp_greeting) | |
523 | {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';} | |
524 | addr->smtp_greeting = smtp_greeting; | |
525 | ||
526 | if (helo_response) | |
527 | {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';} | |
528 | addr->helo_response = helo_response; | |
529 | #endif | |
530 | } | |
447d236c | 531 | } |
0756eb3c PH |
532 | } |
533 | ||
895fbaf2 JH |
534 | static void |
535 | set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
536 | BOOL pass_message) | |
537 | { | |
538 | set_errno(addrlist, errno_value, msg, rc, pass_message, NULL | |
539 | #ifdef EXPERIMENTAL_DSN_INFO | |
540 | , NULL, NULL | |
541 | #endif | |
542 | ); | |
543 | } | |
0756eb3c PH |
544 | |
545 | ||
546 | /************************************************* | |
547 | * Check an SMTP response * | |
548 | *************************************************/ | |
549 | ||
550 | /* This function is given an errno code and the SMTP response buffer | |
551 | to analyse, together with the host identification for generating messages. It | |
552 | sets an appropriate message and puts the first digit of the response code into | |
553 | the yield variable. If no response was actually read, a suitable digit is | |
554 | chosen. | |
555 | ||
556 | Arguments: | |
447d236c PH |
557 | host the current host, to get its name for messages |
558 | errno_value pointer to the errno value | |
559 | more_errno from the top address for use with ERRNO_FILTER_FAIL | |
560 | buffer the SMTP response buffer | |
561 | yield where to put a one-digit SMTP response code | |
4c04137d | 562 | message where to put an error message |
447d236c PH |
563 | pass_message set TRUE if message is an SMTP response |
564 | ||
565 | Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE | |
0756eb3c PH |
566 | */ |
567 | ||
a7538db1 JH |
568 | static BOOL |
569 | check_response(host_item *host, int *errno_value, int more_errno, | |
447d236c | 570 | uschar *buffer, int *yield, uschar **message, BOOL *pass_message) |
0756eb3c | 571 | { |
0d9fa8c0 | 572 | uschar * pl = pipelining_active ? US"pipelined " : US""; |
e9166683 | 573 | const uschar * s; |
0756eb3c PH |
574 | |
575 | *yield = '4'; /* Default setting is to give a temporary error */ | |
576 | ||
e9166683 | 577 | switch(*errno_value) |
0756eb3c | 578 | { |
e9166683 JH |
579 | case ETIMEDOUT: /* Handle response timeout */ |
580 | *message = US string_sprintf("SMTP timeout after %s%s", | |
581 | pl, smtp_command); | |
582 | if (transport_count > 0) | |
583 | *message = US string_sprintf("%s (%d bytes written)", *message, | |
584 | transport_count); | |
585 | return FALSE; | |
586 | ||
587 | case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */ | |
588 | s = string_printing(buffer); | |
589 | while (isspace(*s)) s++; | |
590 | *message = *s == 0 | |
591 | ? string_sprintf("Malformed SMTP reply (an empty line) " | |
592 | "in response to %s%s", pl, smtp_command) | |
593 | : string_sprintf("Malformed SMTP reply in response to %s%s: %s", | |
594 | pl, smtp_command, s); | |
595 | return FALSE; | |
596 | ||
597 | case ERRNO_FILTER_FAIL: /* Handle a failed filter process error; | |
598 | can't send QUIT as we mustn't end the DATA. */ | |
599 | *message = string_sprintf("transport filter process failed (%d)%s", | |
600 | more_errno, | |
601 | more_errno == EX_EXECFAILED ? ": unable to execute command" : ""); | |
602 | return FALSE; | |
603 | ||
604 | case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion; | |
605 | can't send QUIT as we mustn't end the DATA. */ | |
606 | *message = | |
607 | string_sprintf("failed to expand headers_add or headers_remove: %s", | |
608 | expand_string_message); | |
609 | return FALSE; | |
610 | ||
611 | case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */ | |
612 | *message = string_sprintf("failed to write a data block"); | |
613 | return FALSE; | |
0756eb3c | 614 | |
8c5d388a | 615 | #ifdef SUPPORT_I18N |
e9166683 JH |
616 | case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */ |
617 | *message = US"utf8 support required but not offered for forwarding"; | |
618 | DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message); | |
619 | return TRUE; | |
250b6871 | 620 | #endif |
e9166683 | 621 | } |
250b6871 | 622 | |
0756eb3c PH |
623 | /* Handle error responses from the remote mailer. */ |
624 | ||
625 | if (buffer[0] != 0) | |
626 | { | |
e9166683 JH |
627 | *message = string_sprintf("SMTP error from remote mail server after %s%s: " |
628 | "%s", pl, smtp_command, s = string_printing(buffer)); | |
447d236c | 629 | *pass_message = TRUE; |
0756eb3c PH |
630 | *yield = buffer[0]; |
631 | return TRUE; | |
632 | } | |
633 | ||
634 | /* No data was read. If there is no errno, this must be the EOF (i.e. | |
19b9dc85 PH |
635 | connection closed) case, which causes deferral. An explicit connection reset |
636 | error has the same effect. Otherwise, put the host's identity in the message, | |
637 | leaving the errno value to be interpreted as well. In all cases, we have to | |
638 | assume the connection is now dead. */ | |
0756eb3c | 639 | |
19b9dc85 | 640 | if (*errno_value == 0 || *errno_value == ECONNRESET) |
0756eb3c PH |
641 | { |
642 | *errno_value = ERRNO_SMTPCLOSED; | |
c562fd30 | 643 | *message = US string_sprintf("Remote host closed connection " |
02b41d71 | 644 | "in response to %s%s", pl, smtp_command); |
0756eb3c | 645 | } |
de6273b4 JH |
646 | else |
647 | *message = US string_sprintf("%s [%s]", host->name, host->address); | |
0756eb3c PH |
648 | |
649 | return FALSE; | |
650 | } | |
651 | ||
652 | ||
653 | ||
654 | /************************************************* | |
655 | * Write error message to logs * | |
656 | *************************************************/ | |
657 | ||
658 | /* This writes to the main log and to the message log. | |
659 | ||
660 | Arguments: | |
0756eb3c | 661 | host the current host |
ec62d0a9 HSHR |
662 | detail the current message (addr_item->message) |
663 | basic_errno the errno (addr_item->basic_errno) | |
0756eb3c PH |
664 | |
665 | Returns: nothing | |
666 | */ | |
667 | ||
668 | static void | |
ec62d0a9 | 669 | write_logs(const host_item *host, const uschar *suffix, int basic_errno) |
0756eb3c | 670 | { |
52f12a7c JH |
671 | gstring * message = LOGGING(outgoing_port) |
672 | ? string_fmt_append(NULL, "H=%s [%s]:%d", host->name, host->address, | |
584ddd64 | 673 | host->port == PORT_NONE ? 25 : host->port) |
52f12a7c | 674 | : string_fmt_append(NULL, "H=%s [%s]", host->name, host->address); |
c562fd30 | 675 | |
ec62d0a9 | 676 | if (suffix) |
0756eb3c | 677 | { |
52f12a7c | 678 | message = string_fmt_append(message, ": %s", suffix); |
ec62d0a9 | 679 | if (basic_errno > 0) |
52f12a7c | 680 | message = string_fmt_append(message, ": %s", strerror(basic_errno)); |
0756eb3c PH |
681 | } |
682 | else | |
52f12a7c | 683 | message = string_fmt_append(message, " %s", exim_errstr(basic_errno)); |
ec62d0a9 | 684 | |
52f12a7c JH |
685 | log_write(0, LOG_MAIN, "%s", string_from_gstring(message)); |
686 | deliver_msglog("%s %s\n", tod_stamp(tod_log), message->s); | |
0756eb3c PH |
687 | } |
688 | ||
c562fd30 JH |
689 | static void |
690 | msglog_line(host_item * host, uschar * message) | |
691 | { | |
37f3dc43 JH |
692 | deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log), |
693 | host->name, host->address, message); | |
c562fd30 JH |
694 | } |
695 | ||
0756eb3c PH |
696 | |
697 | ||
0cbf2b82 | 698 | #ifndef DISABLE_EVENT |
d68218c7 JH |
699 | /************************************************* |
700 | * Post-defer action * | |
701 | *************************************************/ | |
702 | ||
703 | /* This expands an arbitrary per-transport string. | |
704 | It might, for example, be used to write to the database log. | |
705 | ||
706 | Arguments: | |
d68218c7 JH |
707 | addr the address item containing error information |
708 | host the current host | |
709 | ||
710 | Returns: nothing | |
711 | */ | |
712 | ||
713 | static void | |
774ef2d7 | 714 | deferred_event_raise(address_item *addr, host_item *host) |
d68218c7 | 715 | { |
774ef2d7 | 716 | uschar * action = addr->transport->event_action; |
55414b25 | 717 | const uschar * save_domain; |
a7538db1 JH |
718 | uschar * save_local; |
719 | ||
d68218c7 | 720 | if (!action) |
a7538db1 | 721 | return; |
d68218c7 | 722 | |
a7538db1 JH |
723 | save_domain = deliver_domain; |
724 | save_local = deliver_localpart; | |
725 | ||
726 | /*XXX would ip & port already be set up? */ | |
727 | deliver_host_address = string_copy(host->address); | |
774ef2d7 JH |
728 | deliver_host_port = host->port == PORT_NONE ? 25 : host->port; |
729 | event_defer_errno = addr->basic_errno; | |
d68218c7 JH |
730 | |
731 | router_name = addr->router->name; | |
732 | transport_name = addr->transport->name; | |
a7538db1 JH |
733 | deliver_domain = addr->domain; |
734 | deliver_localpart = addr->local_part; | |
735 | ||
774ef2d7 | 736 | (void) event_raise(action, US"msg:host:defer", |
a7538db1 JH |
737 | addr->message |
738 | ? addr->basic_errno > 0 | |
739 | ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno)) | |
740 | : string_copy(addr->message) | |
741 | : addr->basic_errno > 0 | |
742 | ? string_copy(US strerror(addr->basic_errno)) | |
743 | : NULL); | |
744 | ||
745 | deliver_localpart = save_local; | |
746 | deliver_domain = save_domain; | |
d68218c7 JH |
747 | router_name = transport_name = NULL; |
748 | } | |
749 | #endif | |
750 | ||
ee8b8090 JH |
751 | /************************************************* |
752 | * Reap SMTP specific responses * | |
753 | *************************************************/ | |
754 | static int | |
755 | smtp_discard_responses(smtp_context * sx, smtp_transport_options_block * ob, | |
756 | int count) | |
757 | { | |
758 | uschar flushbuffer[4096]; | |
759 | ||
760 | while (count-- > 0) | |
761 | { | |
762 | if (!smtp_read_response(sx, flushbuffer, sizeof(flushbuffer), | |
763 | '2', ob->command_timeout) | |
764 | && (errno != 0 || flushbuffer[0] == 0)) | |
765 | break; | |
766 | } | |
767 | return count; | |
768 | } | |
769 | ||
770 | ||
771 | /* Return boolean success */ | |
772 | ||
773 | static BOOL | |
774 | smtp_reap_banner(smtp_context * sx) | |
775 | { | |
776 | BOOL good_response = smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), | |
777 | '2', (SOB sx->conn_args.ob)->command_timeout); | |
778 | #ifdef EXPERIMENTAL_DSN_INFO | |
779 | sx->smtp_greeting = string_copy(sx->buffer); | |
780 | #endif | |
781 | return good_response; | |
782 | } | |
783 | ||
784 | static BOOL | |
785 | smtp_reap_ehlo(smtp_context * sx) | |
786 | { | |
787 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', | |
788 | (SOB sx->conn_args.ob)->command_timeout)) | |
789 | { | |
790 | if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp) | |
791 | { | |
792 | #ifdef EXPERIMENTAL_DSN_INFO | |
793 | sx->helo_response = string_copy(sx->buffer); | |
794 | #endif | |
795 | return FALSE; | |
796 | } | |
797 | sx->esmtp = FALSE; | |
798 | } | |
799 | #ifdef EXPERIMENTAL_DSN_INFO | |
800 | sx->helo_response = string_copy(sx->buffer); | |
801 | #endif | |
802 | return TRUE; | |
803 | } | |
804 | ||
805 | ||
806 | ||
807 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
808 | static uschar * | |
809 | ehlo_cache_key(const smtp_context * sx) | |
810 | { | |
811 | host_item * host = sx->conn_args.host; | |
812 | return Ustrchr(host->address, ':') | |
813 | ? string_sprintf("[%s]:%d.EHLO", host->address, | |
814 | host->port == PORT_NONE ? sx->port : host->port) | |
815 | : string_sprintf("%s:%d.EHLO", host->address, | |
816 | host->port == PORT_NONE ? sx->port : host->port); | |
817 | } | |
818 | ||
819 | static void | |
820 | write_ehlo_cache_entry(const smtp_context * sx) | |
821 | { | |
822 | open_db dbblock, * dbm_file; | |
823 | ||
824 | if ((dbm_file = dbfn_open(US"misc", O_RDWR, &dbblock, TRUE))) | |
825 | { | |
826 | uschar * ehlo_resp_key = ehlo_cache_key(sx); | |
827 | dbdata_ehlo_resp er = { .data = sx->ehlo_resp }; | |
828 | ||
cb6bd80f JH |
829 | HDEBUG(D_transport) debug_printf("writing clr %04x/%04x cry %04x/%04x\n", |
830 | sx->ehlo_resp.cleartext_features, sx->ehlo_resp.cleartext_auths, | |
831 | sx->ehlo_resp.crypted_features, sx->ehlo_resp.crypted_auths); | |
832 | ||
ee8b8090 JH |
833 | dbfn_write(dbm_file, ehlo_resp_key, &er, (int)sizeof(er)); |
834 | dbfn_close(dbm_file); | |
835 | } | |
836 | } | |
837 | ||
838 | static void | |
839 | invalidate_ehlo_cache_entry(smtp_context * sx) | |
840 | { | |
841 | open_db dbblock, * dbm_file; | |
842 | ||
843 | if ( sx->early_pipe_active | |
844 | && (dbm_file = dbfn_open(US"misc", O_RDWR, &dbblock, TRUE))) | |
845 | { | |
846 | uschar * ehlo_resp_key = ehlo_cache_key(sx); | |
847 | dbfn_delete(dbm_file, ehlo_resp_key); | |
848 | dbfn_close(dbm_file); | |
849 | } | |
850 | } | |
851 | ||
852 | static BOOL | |
853 | read_ehlo_cache_entry(smtp_context * sx) | |
854 | { | |
855 | open_db dbblock; | |
856 | open_db * dbm_file; | |
857 | ||
858 | if (!(dbm_file = dbfn_open(US"misc", O_RDONLY, &dbblock, FALSE))) | |
859 | { DEBUG(D_transport) debug_printf("ehlo-cache: no misc DB\n"); } | |
860 | else | |
861 | { | |
862 | uschar * ehlo_resp_key = ehlo_cache_key(sx); | |
863 | dbdata_ehlo_resp * er; | |
864 | ||
865 | if (!(er = dbfn_read(dbm_file, ehlo_resp_key))) | |
866 | { DEBUG(D_transport) debug_printf("no ehlo-resp record\n"); } | |
867 | else if (time(NULL) - er->time_stamp > retry_data_expire) | |
868 | { | |
869 | DEBUG(D_transport) debug_printf("ehlo-resp record too old\n"); | |
870 | dbfn_close(dbm_file); | |
871 | if ((dbm_file = dbfn_open(US"misc", O_RDWR, &dbblock, TRUE))) | |
872 | dbfn_delete(dbm_file, ehlo_resp_key); | |
873 | } | |
874 | else | |
875 | { | |
876 | sx->ehlo_resp = er->data; | |
877 | dbfn_close(dbm_file); | |
878 | DEBUG(D_transport) debug_printf( | |
879 | "EHLO response bits from cache: cleartext 0x%04x crypted 0x%04x\n", | |
880 | er->data.cleartext_features, er->data.crypted_features); | |
881 | return TRUE; | |
882 | } | |
883 | dbfn_close(dbm_file); | |
884 | } | |
885 | return FALSE; | |
886 | } | |
887 | ||
888 | ||
889 | ||
890 | /* Return an auths bitmap for the set of AUTH methods offered by the server | |
891 | which match our authenticators. */ | |
892 | ||
893 | static unsigned short | |
894 | study_ehlo_auths(smtp_context * sx) | |
895 | { | |
896 | uschar * names; | |
897 | auth_instance * au; | |
898 | uschar authnum; | |
899 | unsigned short authbits = 0; | |
900 | ||
901 | if (!sx->esmtp) return 0; | |
902 | if (!regex_AUTH) regex_AUTH = regex_must_compile(AUTHS_REGEX, FALSE, TRUE); | |
903 | if (!regex_match_and_setup(regex_AUTH, sx->buffer, 0, -1)) return 0; | |
904 | expand_nmax = -1; /* reset */ | |
905 | names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
906 | ||
907 | for (au = auths, authnum = 0; au; au = au->next, authnum++) if (au->client) | |
908 | { | |
909 | const uschar * list = names; | |
910 | int sep = ' '; | |
911 | uschar name[32]; | |
912 | ||
913 | while (string_nextinlist(&list, &sep, name, sizeof(name))) | |
914 | if (strcmpic(au->public_name, name) == 0) | |
915 | { authbits |= BIT(authnum); break; } | |
916 | } | |
917 | ||
918 | DEBUG(D_transport) | |
919 | debug_printf("server offers %s AUTH, methods '%s', bitmap 0x%04x\n", | |
920 | tls_out.active.sock >= 0 ? "crypted" : "plaintext", names, authbits); | |
921 | ||
922 | if (tls_out.active.sock >= 0) | |
923 | sx->ehlo_resp.crypted_auths = authbits; | |
924 | else | |
925 | sx->ehlo_resp.cleartext_auths = authbits; | |
926 | return authbits; | |
927 | } | |
928 | ||
929 | ||
930 | ||
931 | ||
932 | /* Wait for and check responses for early-pipelining. | |
933 | ||
934 | Called from the lower-level smtp_read_response() function | |
935 | used for general code that assume synchronisation, if context | |
936 | flags indicate outstanding early-pipelining commands. Also | |
937 | called fom sync_responses() which handles pipelined commands. | |
938 | ||
939 | Arguments: | |
940 | sx smtp connection context | |
941 | countp number of outstanding responses, adjusted on return | |
942 | ||
943 | Return: | |
944 | OK all well | |
945 | FAIL SMTP error in response | |
946 | */ | |
947 | int | |
948 | smtp_reap_early_pipe(smtp_context * sx, int * countp) | |
949 | { | |
950 | BOOL pending_BANNER = sx->pending_BANNER; | |
951 | BOOL pending_EHLO = sx->pending_EHLO; | |
952 | ||
953 | sx->pending_BANNER = FALSE; /* clear early to avoid recursion */ | |
954 | sx->pending_EHLO = FALSE; | |
955 | ||
956 | if (pending_BANNER) | |
957 | { | |
958 | DEBUG(D_transport) debug_printf("%s expect banner\n", __FUNCTION__); | |
959 | (*countp)--; | |
960 | if (!smtp_reap_banner(sx)) | |
961 | { | |
962 | DEBUG(D_transport) debug_printf("bad banner\n"); | |
963 | goto fail; | |
964 | } | |
965 | } | |
966 | ||
967 | if (pending_EHLO) | |
968 | { | |
969 | unsigned peer_offered; | |
970 | unsigned short authbits = 0, * ap; | |
971 | ||
972 | DEBUG(D_transport) debug_printf("%s expect ehlo\n", __FUNCTION__); | |
973 | (*countp)--; | |
974 | if (!smtp_reap_ehlo(sx)) | |
975 | { | |
976 | DEBUG(D_transport) debug_printf("bad response for EHLO\n"); | |
977 | goto fail; | |
978 | } | |
979 | ||
980 | /* Compare the actual EHLO response to the cached value we assumed; | |
981 | on difference, dump or rewrite the cache and arrange for a retry. */ | |
982 | ||
983 | ap = tls_out.active.sock < 0 | |
984 | ? &sx->ehlo_resp.cleartext_auths : &sx->ehlo_resp.crypted_auths; | |
985 | ||
986 | peer_offered = ehlo_response(sx->buffer, | |
987 | (tls_out.active.sock < 0 ? OPTION_TLS : OPTION_REQUIRETLS) | |
988 | | OPTION_CHUNKING | OPTION_PRDR | OPTION_DSN | OPTION_PIPE | OPTION_SIZE | |
989 | | OPTION_UTF8 | OPTION_EARLY_PIPE | |
990 | ); | |
991 | if ( peer_offered != sx->peer_offered | |
992 | || (authbits = study_ehlo_auths(sx)) != *ap) | |
993 | { | |
994 | HDEBUG(D_transport) | |
cb6bd80f JH |
995 | debug_printf("EHLO %s extensions changed, 0x%04x/0x%04x -> 0x%04x/0x%04x\n", |
996 | tls_out.active.sock < 0 ? "cleartext" : "crypted", | |
ee8b8090 | 997 | sx->peer_offered, *ap, peer_offered, authbits); |
cb6bd80f JH |
998 | *(tls_out.active.sock < 0 |
999 | ? &sx->ehlo_resp.cleartext_features : &sx->ehlo_resp.crypted_features) = peer_offered; | |
ee8b8090 JH |
1000 | *ap = authbits; |
1001 | if (peer_offered & OPTION_EARLY_PIPE) | |
1002 | write_ehlo_cache_entry(sx); | |
1003 | else | |
1004 | invalidate_ehlo_cache_entry(sx); | |
1005 | ||
1006 | return OK; /* just carry on */ | |
1007 | } | |
1008 | } | |
1009 | return OK; | |
1010 | ||
1011 | fail: | |
1012 | invalidate_ehlo_cache_entry(sx); | |
1013 | (void) smtp_discard_responses(sx, sx->conn_args.ob, *countp); | |
1014 | return FAIL; | |
1015 | } | |
1016 | #endif | |
1017 | ||
1018 | ||
0756eb3c PH |
1019 | /************************************************* |
1020 | * Synchronize SMTP responses * | |
1021 | *************************************************/ | |
1022 | ||
1023 | /* This function is called from smtp_deliver() to receive SMTP responses from | |
1024 | the server, and match them up with the commands to which they relate. When | |
1025 | PIPELINING is not in use, this function is called after every command, and is | |
1026 | therefore somewhat over-engineered, but it is simpler to use a single scheme | |
1027 | that works both with and without PIPELINING instead of having two separate sets | |
1028 | of code. | |
1029 | ||
1030 | The set of commands that are buffered up with pipelining may start with MAIL | |
1031 | and may end with DATA; in between are RCPT commands that correspond to the | |
1032 | addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH, | |
1033 | etc.) are never buffered. | |
1034 | ||
1035 | Errors after MAIL or DATA abort the whole process leaving the response in the | |
1036 | buffer. After MAIL, pending responses are flushed, and the original command is | |
1037 | re-instated in big_buffer for error messages. For RCPT commands, the remote is | |
1038 | permitted to reject some recipient addresses while accepting others. However | |
1039 | certain errors clearly abort the whole process. Set the value in | |
1040 | transport_return to PENDING_OK if the address is accepted. If there is a | |
1041 | subsequent general error, it will get reset accordingly. If not, it will get | |
1042 | converted to OK at the end. | |
1043 | ||
1044 | Arguments: | |
df5b41e3 | 1045 | sx smtp connection context |
48c7f9e2 | 1046 | count the number of responses to read |
48c7f9e2 PH |
1047 | pending_DATA 0 if last command sent was not DATA |
1048 | +1 if previously had a good recipient | |
1049 | -1 if not previously had a good recipient | |
0756eb3c PH |
1050 | |
1051 | Returns: 3 if at least one address had 2xx and one had 5xx | |
1052 | 2 if at least one address had 5xx but none had 2xx | |
1053 | 1 if at least one host had a 2xx response, but none had 5xx | |
1054 | 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA) | |
1055 | -1 timeout while reading RCPT response | |
1056 | -2 I/O or other non-response error for RCPT | |
1057 | -3 DATA or MAIL failed - errno and buffer set | |
ee8b8090 | 1058 | -4 banner or EHLO failed (early-pipelining) |
0756eb3c PH |
1059 | */ |
1060 | ||
1061 | static int | |
df5b41e3 | 1062 | sync_responses(smtp_context * sx, int count, int pending_DATA) |
0756eb3c | 1063 | { |
ee8b8090 JH |
1064 | address_item * addr = sx->sync_addr; |
1065 | smtp_transport_options_block * ob = sx->conn_args.ob; | |
0756eb3c PH |
1066 | int yield = 0; |
1067 | ||
ee8b8090 JH |
1068 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
1069 | if (smtp_reap_early_pipe(sx, &count) != OK) | |
1070 | return -4; | |
1071 | #endif | |
1072 | ||
0756eb3c PH |
1073 | /* Handle the response for a MAIL command. On error, reinstate the original |
1074 | command in big_buffer for error message use, and flush any further pending | |
1075 | responses before returning, except after I/O errors and timeouts. */ | |
1076 | ||
df5b41e3 | 1077 | if (sx->pending_MAIL) |
0756eb3c | 1078 | { |
7c576fca | 1079 | DEBUG(D_transport) debug_printf("%s expect mail\n", __FUNCTION__); |
0756eb3c | 1080 | count--; |
251b9eb4 | 1081 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), |
e9166683 | 1082 | '2', ob->command_timeout)) |
0756eb3c | 1083 | { |
e027f545 | 1084 | DEBUG(D_transport) debug_printf("bad response for MAIL\n"); |
0756eb3c | 1085 | Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */ |
df5b41e3 | 1086 | if (errno == 0 && sx->buffer[0] != 0) |
0756eb3c | 1087 | { |
e97957bc | 1088 | int save_errno = 0; |
df5b41e3 | 1089 | if (sx->buffer[0] == '4') |
e97957bc PH |
1090 | { |
1091 | save_errno = ERRNO_MAIL4XX; | |
df5b41e3 | 1092 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc | 1093 | } |
ee8b8090 | 1094 | count = smtp_discard_responses(sx, ob, count); |
e97957bc | 1095 | errno = save_errno; |
0756eb3c | 1096 | } |
c562fd30 JH |
1097 | |
1098 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
1099 | while (count-- > 0) /* Mark any pending addrs with the host used */ | |
1100 | { | |
1101 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
ee8b8090 | 1102 | addr->host_used = sx->conn_args.host; |
c562fd30 JH |
1103 | addr = addr->next; |
1104 | } | |
0756eb3c PH |
1105 | return -3; |
1106 | } | |
1107 | } | |
1108 | ||
1109 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
1110 | ||
1111 | /* Read and handle the required number of RCPT responses, matching each one up | |
1112 | with an address by scanning for the next address whose status is PENDING_DEFER. | |
1113 | */ | |
1114 | ||
1115 | while (count-- > 0) | |
1116 | { | |
4c2471ca JH |
1117 | while (addr->transport_return != PENDING_DEFER) |
1118 | if (!(addr = addr->next)) | |
1119 | return -2; | |
0756eb3c PH |
1120 | |
1121 | /* The address was accepted */ | |
ee8b8090 | 1122 | addr->host_used = sx->conn_args.host; |
0756eb3c | 1123 | |
7c576fca | 1124 | DEBUG(D_transport) debug_printf("%s expect rcpt\n", __FUNCTION__); |
251b9eb4 | 1125 | if (smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), |
e9166683 | 1126 | '2', ob->command_timeout)) |
0756eb3c PH |
1127 | { |
1128 | yield |= 1; | |
1129 | addr->transport_return = PENDING_OK; | |
1130 | ||
1131 | /* If af_dr_retry_exists is set, there was a routing delay on this address; | |
09945f1e PH |
1132 | ensure that any address-specific retry record is expunged. We do this both |
1133 | for the basic key and for the version that also includes the sender. */ | |
0756eb3c PH |
1134 | |
1135 | if (testflag(addr, af_dr_retry_exists)) | |
09945f1e PH |
1136 | { |
1137 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, | |
1138 | sender_address); | |
1139 | retry_add_item(addr, altkey, rf_delete); | |
0756eb3c | 1140 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
09945f1e | 1141 | } |
0756eb3c PH |
1142 | } |
1143 | ||
1144 | /* Timeout while reading the response */ | |
1145 | ||
1146 | else if (errno == ETIMEDOUT) | |
1147 | { | |
c562fd30 | 1148 | uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>", |
ee8b8090 | 1149 | transport_rcpt_address(addr, sx->conn_args.tblock->rcpt_include_affixes)); |
df5b41e3 | 1150 | set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE); |
0756eb3c | 1151 | retry_add_item(addr, addr->address_retry_key, 0); |
f6c332bd | 1152 | update_waiting = FALSE; |
0756eb3c PH |
1153 | return -1; |
1154 | } | |
1155 | ||
1156 | /* Handle other errors in obtaining an SMTP response by returning -1. This | |
1157 | will cause all the addresses to be deferred. Restore the SMTP command in | |
1158 | big_buffer for which we are checking the response, so the error message | |
1159 | makes sense. */ | |
1160 | ||
df5b41e3 | 1161 | else if (errno != 0 || sx->buffer[0] == 0) |
0756eb3c PH |
1162 | { |
1163 | string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>", | |
ee8b8090 | 1164 | transport_rcpt_address(addr, sx->conn_args.tblock->rcpt_include_affixes)); |
0756eb3c PH |
1165 | return -2; |
1166 | } | |
1167 | ||
1168 | /* Handle SMTP permanent and temporary response codes. */ | |
1169 | ||
1170 | else | |
1171 | { | |
1172 | addr->message = | |
447d236c | 1173 | string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: " |
ee8b8090 | 1174 | "%s", transport_rcpt_address(addr, sx->conn_args.tblock->rcpt_include_affixes), |
df5b41e3 | 1175 | string_printing(sx->buffer)); |
447d236c | 1176 | setflag(addr, af_pass_message); |
e9166683 | 1177 | if (!sx->verify) |
ee8b8090 | 1178 | msglog_line(sx->conn_args.host, addr->message); |
0756eb3c PH |
1179 | |
1180 | /* The response was 5xx */ | |
1181 | ||
df5b41e3 | 1182 | if (sx->buffer[0] == '5') |
0756eb3c PH |
1183 | { |
1184 | addr->transport_return = FAIL; | |
1185 | yield |= 2; | |
1186 | } | |
1187 | ||
1188 | /* The response was 4xx */ | |
1189 | ||
1190 | else | |
1191 | { | |
0756eb3c PH |
1192 | addr->transport_return = DEFER; |
1193 | addr->basic_errno = ERRNO_RCPT4XX; | |
df5b41e3 | 1194 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
0756eb3c | 1195 | |
e9166683 JH |
1196 | if (!sx->verify) |
1197 | { | |
0cbf2b82 | 1198 | #ifndef DISABLE_EVENT |
e9166683 JH |
1199 | event_defer_errno = addr->more_errno; |
1200 | msg_event_raise(US"msg:rcpt:host:defer", addr); | |
5ef5dd52 JB |
1201 | #endif |
1202 | ||
e9166683 JH |
1203 | /* Log temporary errors if there are more hosts to be tried. |
1204 | If not, log this last one in the == line. */ | |
0756eb3c | 1205 | |
ee8b8090 | 1206 | if (sx->conn_args.host->next) |
67ea939c JH |
1207 | if (LOGGING(outgoing_port)) |
1208 | log_write(0, LOG_MAIN, "H=%s [%s]:%d %s", sx->conn_args.host->name, | |
1209 | sx->conn_args.host->address, | |
1210 | sx->port == PORT_NONE ? 25 : sx->port, addr->message); | |
1211 | else | |
1212 | log_write(0, LOG_MAIN, "H=%s [%s]: %s", sx->conn_args.host->name, | |
1213 | sx->conn_args.host->address, addr->message); | |
0756eb3c | 1214 | |
0cbf2b82 | 1215 | #ifndef DISABLE_EVENT |
e9166683 JH |
1216 | else |
1217 | msg_event_raise(US"msg:rcpt:defer", addr); | |
5ef5dd52 JB |
1218 | #endif |
1219 | ||
e9166683 JH |
1220 | /* Do not put this message on the list of those waiting for specific |
1221 | hosts, as otherwise it is likely to be tried too often. */ | |
0756eb3c | 1222 | |
e9166683 | 1223 | update_waiting = FALSE; |
0756eb3c | 1224 | |
e9166683 JH |
1225 | /* Add a retry item for the address so that it doesn't get tried again |
1226 | too soon. If address_retry_include_sender is true, add the sender address | |
1227 | to the retry key. */ | |
0756eb3c | 1228 | |
e9166683 JH |
1229 | retry_add_item(addr, |
1230 | ob->address_retry_include_sender | |
1231 | ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address) | |
1232 | : addr->address_retry_key, | |
1233 | 0); | |
1234 | } | |
0756eb3c PH |
1235 | } |
1236 | } | |
1237 | } /* Loop for next RCPT response */ | |
1238 | ||
1239 | /* Update where to start at for the next block of responses, unless we | |
1240 | have already handled all the addresses. */ | |
1241 | ||
e9166683 | 1242 | if (addr) sx->sync_addr = addr->next; |
0756eb3c PH |
1243 | |
1244 | /* Handle a response to DATA. If we have not had any good recipients, either | |
1245 | previously or in this block, the response is ignored. */ | |
1246 | ||
7c576fca | 1247 | if (pending_DATA != 0) |
0756eb3c | 1248 | { |
7c576fca | 1249 | DEBUG(D_transport) debug_printf("%s expect data\n", __FUNCTION__); |
251b9eb4 | 1250 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), |
7c576fca | 1251 | '3', ob->command_timeout)) |
e97957bc | 1252 | { |
7c576fca JH |
1253 | int code; |
1254 | uschar *msg; | |
1255 | BOOL pass_message; | |
1256 | if (pending_DATA > 0 || (yield & 1) != 0) | |
e97957bc | 1257 | { |
7c576fca JH |
1258 | if (errno == 0 && sx->buffer[0] == '4') |
1259 | { | |
1260 | errno = ERRNO_DATA4XX; | |
1261 | sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
1262 | } | |
1263 | return -3; | |
e97957bc | 1264 | } |
ee8b8090 | 1265 | (void)check_response(sx->conn_args.host, &errno, 0, sx->buffer, &code, &msg, &pass_message); |
7c576fca JH |
1266 | DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining " |
1267 | "is in use and there were no good recipients\n", msg); | |
e97957bc | 1268 | } |
0756eb3c PH |
1269 | } |
1270 | ||
1271 | /* All responses read and handled; MAIL (if present) received 2xx and DATA (if | |
1272 | present) received 3xx. If any RCPTs were handled and yielded anything other | |
1273 | than 4xx, yield will be set non-zero. */ | |
1274 | ||
1275 | return yield; | |
1276 | } | |
1277 | ||
1278 | ||
1279 | ||
ee8b8090 JH |
1280 | |
1281 | ||
1282 | /* Try an authenticator's client entry */ | |
1283 | ||
1284 | static int | |
1285 | try_authenticator(smtp_context * sx, auth_instance * au) | |
1286 | { | |
1287 | smtp_transport_options_block * ob = sx->conn_args.ob; /* transport options */ | |
1288 | host_item * host = sx->conn_args.host; /* host to deliver to */ | |
1289 | int rc; | |
1290 | ||
1291 | sx->outblock.authenticating = TRUE; | |
1292 | rc = (au->info->clientcode)(au, sx, ob->command_timeout, | |
1293 | sx->buffer, sizeof(sx->buffer)); | |
1294 | sx->outblock.authenticating = FALSE; | |
1295 | DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n", au->name, rc); | |
1296 | ||
1297 | /* A temporary authentication failure must hold up delivery to | |
1298 | this host. After a permanent authentication failure, we carry on | |
1299 | to try other authentication methods. If all fail hard, try to | |
1300 | deliver the message unauthenticated unless require_auth was set. */ | |
1301 | ||
1302 | switch(rc) | |
1303 | { | |
1304 | case OK: | |
1305 | f.smtp_authenticated = TRUE; /* stops the outer loop */ | |
1306 | client_authenticator = au->name; | |
1307 | if (au->set_client_id) | |
1308 | client_authenticated_id = expand_string(au->set_client_id); | |
1309 | break; | |
1310 | ||
1311 | /* Failure after writing a command */ | |
1312 | ||
1313 | case FAIL_SEND: | |
1314 | return FAIL_SEND; | |
1315 | ||
1316 | /* Failure after reading a response */ | |
1317 | ||
1318 | case FAIL: | |
1319 | if (errno != 0 || sx->buffer[0] != '5') return FAIL; | |
1320 | log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s", | |
1321 | au->name, host->name, host->address, sx->buffer); | |
1322 | break; | |
1323 | ||
1324 | /* Failure by some other means. In effect, the authenticator | |
1325 | decided it wasn't prepared to handle this case. Typically this | |
1326 | is the result of "fail" in an expansion string. Do we need to | |
1327 | log anything here? Feb 2006: a message is now put in the buffer | |
1328 | if logging is required. */ | |
1329 | ||
1330 | case CANCELLED: | |
1331 | if (*sx->buffer != 0) | |
1332 | log_write(0, LOG_MAIN, "%s authenticator cancelled " | |
1333 | "authentication H=%s [%s] %s", au->name, host->name, | |
1334 | host->address, sx->buffer); | |
1335 | break; | |
1336 | ||
1337 | /* Internal problem, message in buffer. */ | |
1338 | ||
1339 | case ERROR: | |
1340 | set_errno_nohost(sx->addrlist, ERRNO_AUTHPROB, string_copy(sx->buffer), | |
1341 | DEFER, FALSE); | |
1342 | return ERROR; | |
1343 | } | |
1344 | return OK; | |
1345 | } | |
1346 | ||
1347 | ||
1348 | ||
1349 | ||
1350 | /* Do the client side of smtp-level authentication. | |
1351 | ||
fcc8e047 | 1352 | Arguments: |
ee8b8090 JH |
1353 | sx smtp connection context |
1354 | ||
1355 | sx->buffer should have the EHLO response from server (gets overwritten) | |
fcc8e047 JH |
1356 | |
1357 | Returns: | |
1358 | OK Success, or failed (but not required): global "smtp_authenticated" set | |
1359 | DEFER Failed authentication (and was required) | |
1360 | ERROR Internal problem | |
1361 | ||
1362 | FAIL_SEND Failed communications - transmit | |
1363 | FAIL - response | |
1364 | */ | |
1365 | ||
251b9eb4 | 1366 | static int |
ee8b8090 | 1367 | smtp_auth(smtp_context * sx) |
fcc8e047 | 1368 | { |
ee8b8090 JH |
1369 | host_item * host = sx->conn_args.host; /* host to deliver to */ |
1370 | smtp_transport_options_block * ob = sx->conn_args.ob; /* transport options */ | |
1371 | int require_auth = verify_check_given_host(CUSS &ob->hosts_require_auth, host); | |
1372 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
1373 | unsigned short authbits = tls_out.active.sock >= 0 | |
1374 | ? sx->ehlo_resp.crypted_auths : sx->ehlo_resp.cleartext_auths; | |
1375 | #endif | |
1376 | uschar * fail_reason = US"server did not advertise AUTH support"; | |
fcc8e047 | 1377 | |
8768d548 | 1378 | f.smtp_authenticated = FALSE; |
a7538db1 | 1379 | client_authenticator = client_authenticated_id = client_authenticated_sender = NULL; |
fcc8e047 | 1380 | |
ee8b8090 JH |
1381 | if (!regex_AUTH) |
1382 | regex_AUTH = regex_must_compile(AUTHS_REGEX, FALSE, TRUE); | |
1383 | ||
1384 | /* Is the server offering AUTH? */ | |
fcc8e047 | 1385 | |
ee8b8090 JH |
1386 | if ( sx->esmtp |
1387 | && | |
1388 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
1389 | sx->early_pipe_active ? authbits | |
1390 | : | |
1391 | #endif | |
1392 | regex_match_and_setup(regex_AUTH, sx->buffer, 0, -1) | |
1393 | ) | |
a7538db1 | 1394 | { |
ee8b8090 | 1395 | uschar * names = NULL; |
a7538db1 | 1396 | expand_nmax = -1; /* reset */ |
fcc8e047 | 1397 | |
ee8b8090 JH |
1398 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
1399 | if (!sx->early_pipe_active) | |
1400 | #endif | |
1401 | names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
1402 | ||
a7538db1 | 1403 | /* Must not do this check until after we have saved the result of the |
ee8b8090 | 1404 | regex match above as the check could be another RE. */ |
fcc8e047 | 1405 | |
ee8b8090 JH |
1406 | if ( require_auth == OK |
1407 | || verify_check_given_host(CUSS &ob->hosts_try_auth, host) == OK) | |
a7538db1 | 1408 | { |
ee8b8090 | 1409 | auth_instance * au; |
fcc8e047 | 1410 | |
a7538db1 | 1411 | DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n"); |
ee8b8090 JH |
1412 | fail_reason = US"no common mechanisms were found"; |
1413 | ||
1414 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
1415 | if (sx->early_pipe_active) | |
1416 | { | |
1417 | /* Scan our authenticators (which support use by a client and were offered | |
1418 | by the server (checked at cache-write time)), not suppressed by | |
1419 | client_condition. If one is found, attempt to authenticate by calling its | |
1420 | client function. We are limited to supporting up to 16 authenticator | |
1421 | public-names by the number of bits in a short. */ | |
1422 | ||
1423 | uschar bitnum; | |
1424 | int rc; | |
1425 | ||
1426 | for (bitnum = 0, au = auths; | |
1427 | !f.smtp_authenticated && au && bitnum < 16; | |
1428 | bitnum++, au = au->next) if (authbits & BIT(bitnum)) | |
1429 | { | |
1430 | if ( au->client_condition | |
1431 | && !expand_check_condition(au->client_condition, au->name, | |
1432 | US"client authenticator")) | |
1433 | { | |
1434 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1435 | au->name, "client_condition is false"); | |
1436 | continue; | |
1437 | } | |
1438 | ||
1439 | /* Found data for a listed mechanism. Call its client entry. Set | |
1440 | a flag in the outblock so that data is overwritten after sending so | |
1441 | that reflections don't show it. */ | |
1442 | ||
1443 | fail_reason = US"authentication attempt(s) failed"; | |
1444 | ||
1445 | if ((rc = try_authenticator(sx, au)) != OK) | |
1446 | return rc; | |
1447 | } | |
1448 | } | |
1449 | else | |
1450 | #endif | |
fcc8e047 | 1451 | |
a7538db1 JH |
1452 | /* Scan the configured authenticators looking for one which is configured |
1453 | for use as a client, which is not suppressed by client_condition, and | |
1454 | whose name matches an authentication mechanism supported by the server. | |
1455 | If one is found, attempt to authenticate by calling its client function. | |
1456 | */ | |
fcc8e047 | 1457 | |
8768d548 | 1458 | for (au = auths; !f.smtp_authenticated && au; au = au->next) |
a7538db1 JH |
1459 | { |
1460 | uschar *p = names; | |
ee8b8090 JH |
1461 | |
1462 | if ( !au->client | |
1463 | || ( au->client_condition | |
1464 | && !expand_check_condition(au->client_condition, au->name, | |
1465 | US"client authenticator"))) | |
a7538db1 JH |
1466 | { |
1467 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1468 | au->name, | |
1469 | (au->client)? "client_condition is false" : | |
1470 | "not configured as a client"); | |
1471 | continue; | |
1472 | } | |
fcc8e047 | 1473 | |
a7538db1 | 1474 | /* Loop to scan supported server mechanisms */ |
fcc8e047 | 1475 | |
cab0c277 | 1476 | while (*p) |
a7538db1 | 1477 | { |
a7538db1 | 1478 | int len = Ustrlen(au->public_name); |
ee8b8090 JH |
1479 | int rc; |
1480 | ||
a7538db1 | 1481 | while (isspace(*p)) p++; |
fcc8e047 | 1482 | |
a7538db1 JH |
1483 | if (strncmpic(au->public_name, p, len) != 0 || |
1484 | (p[len] != 0 && !isspace(p[len]))) | |
1485 | { | |
1486 | while (*p != 0 && !isspace(*p)) p++; | |
1487 | continue; | |
1488 | } | |
fcc8e047 | 1489 | |
a7538db1 JH |
1490 | /* Found data for a listed mechanism. Call its client entry. Set |
1491 | a flag in the outblock so that data is overwritten after sending so | |
1492 | that reflections don't show it. */ | |
fcc8e047 | 1493 | |
a7538db1 | 1494 | fail_reason = US"authentication attempt(s) failed"; |
a7538db1 | 1495 | |
ee8b8090 JH |
1496 | if ((rc = try_authenticator(sx, au)) != OK) |
1497 | return rc; | |
fcc8e047 | 1498 | |
a7538db1 JH |
1499 | break; /* If not authenticated, try next authenticator */ |
1500 | } /* Loop for scanning supported server mechanisms */ | |
1501 | } /* Loop for further authenticators */ | |
fcc8e047 | 1502 | } |
a7538db1 | 1503 | } |
fcc8e047 | 1504 | |
a7538db1 | 1505 | /* If we haven't authenticated, but are required to, give up. */ |
fcc8e047 | 1506 | |
8768d548 | 1507 | if (require_auth == OK && !f.smtp_authenticated) |
a7538db1 | 1508 | { |
251b9eb4 | 1509 | set_errno_nohost(sx->addrlist, ERRNO_AUTHFAIL, |
a7538db1 | 1510 | string_sprintf("authentication required but %s", fail_reason), DEFER, |
895fbaf2 | 1511 | FALSE); |
a7538db1 JH |
1512 | return DEFER; |
1513 | } | |
4d8d62b9 | 1514 | |
a7538db1 | 1515 | return OK; |
fcc8e047 JH |
1516 | } |
1517 | ||
1518 | ||
1519 | /* Construct AUTH appendix string for MAIL TO */ | |
1520 | /* | |
1521 | Arguments | |
1522 | buffer to build string | |
1523 | addrlist chain of potential addresses to deliver | |
1524 | ob transport options | |
1525 | ||
8768d548 | 1526 | Globals f.smtp_authenticated |
fcc8e047 JH |
1527 | client_authenticated_sender |
1528 | Return True on error, otherwise buffer has (possibly empty) terminated string | |
1529 | */ | |
1530 | ||
1531 | BOOL | |
1532 | smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist, | |
1533 | smtp_transport_options_block *ob) | |
1534 | { | |
1535 | uschar *local_authenticated_sender = authenticated_sender; | |
1536 | ||
1537 | #ifdef notdef | |
8768d548 | 1538 | debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, f.smtp_authenticated?"Y":"N"); |
fcc8e047 JH |
1539 | #endif |
1540 | ||
1541 | if (ob->authenticated_sender != NULL) | |
1542 | { | |
1543 | uschar *new = expand_string(ob->authenticated_sender); | |
1544 | if (new == NULL) | |
1545 | { | |
8768d548 | 1546 | if (!f.expand_string_forcedfail) |
fcc8e047 JH |
1547 | { |
1548 | uschar *message = string_sprintf("failed to expand " | |
1549 | "authenticated_sender: %s", expand_string_message); | |
895fbaf2 | 1550 | set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
fcc8e047 JH |
1551 | return TRUE; |
1552 | } | |
1553 | } | |
1554 | else if (new[0] != 0) local_authenticated_sender = new; | |
1555 | } | |
1556 | ||
1557 | /* Add the authenticated sender address if present */ | |
1558 | ||
8768d548 | 1559 | if ((f.smtp_authenticated || ob->authenticated_sender_force) && |
fcc8e047 JH |
1560 | local_authenticated_sender != NULL) |
1561 | { | |
1562 | string_format(buffer, bufsize, " AUTH=%s", | |
1563 | auth_xtextencode(local_authenticated_sender, | |
1564 | Ustrlen(local_authenticated_sender))); | |
1565 | client_authenticated_sender = string_copy(local_authenticated_sender); | |
1566 | } | |
1567 | else | |
1568 | *buffer= 0; | |
1569 | ||
1570 | return FALSE; | |
1571 | } | |
1572 | ||
1573 | ||
1574 | ||
c0635b6d | 1575 | #ifdef SUPPORT_DANE |
2d5fdd53 JH |
1576 | /* Lookup TLSA record for host/port. |
1577 | Return: OK success with dnssec; DANE mode | |
1578 | DEFER Do not use this host now, may retry later | |
1579 | FAIL_FORCED No TLSA record; DANE not usable | |
1580 | FAIL Do not use this connection | |
1581 | */ | |
1582 | ||
0e66b3b6 | 1583 | int |
4b0fe319 | 1584 | tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required) |
0e66b3b6 JH |
1585 | { |
1586 | /* move this out to host.c given the similarity to dns_lookup() ? */ | |
1587 | uschar buffer[300]; | |
55414b25 | 1588 | const uschar * fullname = buffer; |
58c30e47 JH |
1589 | int rc; |
1590 | BOOL sec; | |
0e66b3b6 JH |
1591 | |
1592 | /* TLSA lookup string */ | |
1593 | (void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name); | |
1594 | ||
58c30e47 JH |
1595 | rc = dns_lookup(dnsa, buffer, T_TLSA, &fullname); |
1596 | sec = dns_is_secure(dnsa); | |
1597 | DEBUG(D_transport) | |
1598 | debug_printf("TLSA lookup ret %d %sDNSSEC\n", rc, sec ? "" : "not "); | |
1599 | ||
1600 | switch (rc) | |
0e66b3b6 | 1601 | { |
2d5fdd53 JH |
1602 | case DNS_AGAIN: |
1603 | return DEFER; /* just defer this TLS'd conn */ | |
1604 | ||
899b8bbc | 1605 | case DNS_SUCCEED: |
624f33df JH |
1606 | if (sec) |
1607 | { | |
1608 | DEBUG(D_transport) | |
1609 | { | |
1610 | dns_scan dnss; | |
1611 | dns_record * rr; | |
1612 | for (rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS); rr; | |
1b76ad22 JH |
1613 | rr = dns_next_rr(dnsa, &dnss, RESET_NEXT)) |
1614 | if (rr->type == T_TLSA && rr->size > 3) | |
1615 | { | |
1616 | uint16_t payload_length = rr->size - 3; | |
1617 | uschar s[MAX_TLSA_EXPANDED_SIZE], * sp = s, * p = US rr->data; | |
1618 | ||
1619 | sp += sprintf(CS sp, "%d ", *p++); /* usage */ | |
1620 | sp += sprintf(CS sp, "%d ", *p++); /* selector */ | |
1621 | sp += sprintf(CS sp, "%d ", *p++); /* matchtype */ | |
1622 | while (payload_length-- > 0 && sp-s < (MAX_TLSA_EXPANDED_SIZE - 4)) | |
1623 | sp += sprintf(CS sp, "%02x", *p++); | |
1624 | ||
1625 | debug_printf(" %s\n", s); | |
1626 | } | |
624f33df JH |
1627 | } |
1628 | return OK; | |
1629 | } | |
899b8bbc JH |
1630 | log_write(0, LOG_MAIN, |
1631 | "DANE error: TLSA lookup for %s not DNSSEC", host->name); | |
1632 | /*FALLTRHOUGH*/ | |
1633 | ||
ef3a1a30 JH |
1634 | case DNS_NODATA: /* no TLSA RR for this lookup */ |
1635 | case DNS_NOMATCH: /* no records at all for this lookup */ | |
6b524204 | 1636 | return dane_required ? FAIL : FAIL_FORCED; |
2d5fdd53 JH |
1637 | |
1638 | default: | |
1639 | case DNS_FAIL: | |
1640 | return dane_required ? FAIL : DEFER; | |
0e66b3b6 | 1641 | } |
0e66b3b6 JH |
1642 | } |
1643 | #endif | |
1644 | ||
1645 | ||
a39bd74d JB |
1646 | |
1647 | typedef struct smtp_compare_s | |
1648 | { | |
1649 | uschar *current_sender_address; | |
1650 | struct transport_instance *tblock; | |
1651 | } smtp_compare_t; | |
1652 | ||
d093f8e5 JH |
1653 | |
1654 | /* Create a unique string that identifies this message, it is based on | |
1655 | sender_address, helo_data and tls_certificate if enabled. | |
1656 | */ | |
a39bd74d JB |
1657 | |
1658 | static uschar * | |
1659 | smtp_local_identity(uschar * sender, struct transport_instance * tblock) | |
1660 | { | |
1661 | address_item * addr1; | |
1662 | uschar * if1 = US""; | |
1663 | uschar * helo1 = US""; | |
1664 | #ifdef SUPPORT_TLS | |
1665 | uschar * tlsc1 = US""; | |
1666 | #endif | |
1667 | uschar * save_sender_address = sender_address; | |
1668 | uschar * local_identity = NULL; | |
ee8b8090 | 1669 | smtp_transport_options_block * ob = SOB tblock->options_block; |
a39bd74d JB |
1670 | |
1671 | sender_address = sender; | |
1672 | ||
1673 | addr1 = deliver_make_addr (sender, TRUE); | |
1674 | deliver_set_expansions(addr1); | |
1675 | ||
1676 | if (ob->interface) | |
1677 | if1 = expand_string(ob->interface); | |
1678 | ||
1679 | if (ob->helo_data) | |
1680 | helo1 = expand_string(ob->helo_data); | |
1681 | ||
1682 | #ifdef SUPPORT_TLS | |
1683 | if (ob->tls_certificate) | |
1684 | tlsc1 = expand_string(ob->tls_certificate); | |
1685 | local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1); | |
1686 | #else | |
1687 | local_identity = string_sprintf ("%s^%s", if1, helo1); | |
1688 | #endif | |
1689 | ||
1690 | deliver_set_expansions(NULL); | |
1691 | sender_address = save_sender_address; | |
1692 | ||
1693 | return local_identity; | |
1694 | } | |
1695 | ||
1696 | ||
1697 | ||
1698 | /* This routine is a callback that is called from transport_check_waiting. | |
1699 | This function will evaluate the incoming message versus the previous | |
1700 | message. If the incoming message is using a different local identity then | |
1701 | we will veto this new message. */ | |
1702 | ||
1703 | static BOOL | |
1704 | smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare) | |
1705 | { | |
dadff1d4 HSHR |
1706 | uschar * message_local_identity, |
1707 | * current_local_identity, | |
1708 | * new_sender_address; | |
1709 | ||
1710 | current_local_identity = | |
a39bd74d | 1711 | smtp_local_identity(s_compare->current_sender_address, s_compare->tblock); |
a39bd74d | 1712 | |
dadff1d4 HSHR |
1713 | if (!(new_sender_address = deliver_get_sender_address(message_id))) |
1714 | return 0; | |
1715 | ||
1716 | message_local_identity = | |
1717 | smtp_local_identity(new_sender_address, s_compare->tblock); | |
a39bd74d JB |
1718 | |
1719 | return Ustrcmp(current_local_identity, message_local_identity) == 0; | |
1720 | } | |
1721 | ||
1722 | ||
1723 | ||
8ac90765 JH |
1724 | static unsigned |
1725 | ehlo_response(uschar * buf, unsigned checks) | |
9094b84b | 1726 | { |
e9166683 JH |
1727 | size_t bsize = Ustrlen(buf); |
1728 | ||
ee8b8090 | 1729 | /* debug_printf("%s: check for 0x%04x\n", __FUNCTION__, checks); */ |
8ac90765 | 1730 | |
ee8b8090 | 1731 | #ifdef SUPPORT_TLS |
8ac90765 JH |
1732 | # ifdef EXPERIMENTAL_REQUIRETLS |
1733 | if ( checks & OPTION_REQUIRETLS | |
1734 | && pcre_exec(regex_REQUIRETLS, NULL, CS buf,bsize, 0, PCRE_EOPT, NULL,0) < 0) | |
8ac90765 | 1735 | # endif |
ee8b8090 JH |
1736 | checks &= ~OPTION_REQUIRETLS; |
1737 | ||
1738 | if ( checks & OPTION_TLS | |
1739 | && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
9094b84b | 1740 | #endif |
ee8b8090 | 1741 | checks &= ~OPTION_TLS; |
9094b84b | 1742 | |
14de8063 | 1743 | if ( checks & OPTION_IGNQ |
ff5aac2b JH |
1744 | && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0, |
1745 | PCRE_EOPT, NULL, 0) < 0) | |
14de8063 | 1746 | checks &= ~OPTION_IGNQ; |
9094b84b | 1747 | |
14de8063 | 1748 | if ( checks & OPTION_CHUNKING |
f98442df | 1749 | && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1750 | checks &= ~OPTION_CHUNKING; |
f98442df | 1751 | |
9094b84b | 1752 | #ifndef DISABLE_PRDR |
14de8063 | 1753 | if ( checks & OPTION_PRDR |
ff5aac2b | 1754 | && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
9094b84b | 1755 | #endif |
ee8b8090 | 1756 | checks &= ~OPTION_PRDR; |
9094b84b JH |
1757 | |
1758 | #ifdef SUPPORT_I18N | |
14de8063 | 1759 | if ( checks & OPTION_UTF8 |
ff5aac2b | 1760 | && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
9094b84b | 1761 | #endif |
ee8b8090 | 1762 | checks &= ~OPTION_UTF8; |
9094b84b | 1763 | |
14de8063 | 1764 | if ( checks & OPTION_DSN |
ff5aac2b | 1765 | && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1766 | checks &= ~OPTION_DSN; |
9094b84b | 1767 | |
14de8063 | 1768 | if ( checks & OPTION_PIPE |
ff5aac2b JH |
1769 | && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0, |
1770 | PCRE_EOPT, NULL, 0) < 0) | |
14de8063 | 1771 | checks &= ~OPTION_PIPE; |
9094b84b | 1772 | |
14de8063 | 1773 | if ( checks & OPTION_SIZE |
ff5aac2b | 1774 | && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1775 | checks &= ~OPTION_SIZE; |
9094b84b | 1776 | |
ee8b8090 JH |
1777 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
1778 | if ( checks & OPTION_EARLY_PIPE | |
1779 | && pcre_exec(regex_EARLY_PIPE, NULL, CS buf, bsize, 0, | |
1780 | PCRE_EOPT, NULL, 0) < 0) | |
1781 | #endif | |
1782 | checks &= ~OPTION_EARLY_PIPE; | |
1783 | ||
1784 | /* debug_printf("%s: found 0x%04x\n", __FUNCTION__, checks); */ | |
9094b84b JH |
1785 | return checks; |
1786 | } | |
1787 | ||
1788 | ||
6d5c916c JH |
1789 | |
1790 | /* Callback for emitting a BDAT data chunk header. | |
6d5c916c | 1791 | |
e027f545 JH |
1792 | If given a nonzero size, first flush any buffered SMTP commands |
1793 | then emit the command. | |
1794 | ||
d2aa036b JH |
1795 | Reap previous SMTP command responses if requested, and always reap |
1796 | the response from a previous BDAT command. | |
1797 | ||
1798 | Args: | |
1799 | tctx transport context | |
1800 | chunk_size value for SMTP BDAT command | |
1801 | flags | |
1802 | tc_chunk_last add LAST option to SMTP BDAT command | |
1803 | tc_reap_prev reap response to previous SMTP commands | |
6d5c916c JH |
1804 | |
1805 | Returns: OK or ERROR | |
1806 | */ | |
1807 | ||
1808 | static int | |
d2aa036b JH |
1809 | smtp_chunk_cmd_callback(transport_ctx * tctx, unsigned chunk_size, |
1810 | unsigned flags) | |
6d5c916c | 1811 | { |
ee8b8090 | 1812 | smtp_transport_options_block * ob = SOB tctx->tblock->options_block; |
e9166683 | 1813 | smtp_context * sx = tctx->smtp_context; |
e027f545 JH |
1814 | int cmd_count = 0; |
1815 | int prev_cmd_count; | |
6d5c916c | 1816 | |
4e910c01 JH |
1817 | /* Write SMTP chunk header command. If not reaping responses, note that |
1818 | there may be more writes (like, the chunk data) done soon. */ | |
6d5c916c | 1819 | |
e027f545 | 1820 | if (chunk_size > 0) |
87cb4a16 | 1821 | { |
ee8b8090 JH |
1822 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
1823 | BOOL new_conn = !!(sx->outblock.conn_args); | |
1824 | #endif | |
251b9eb4 | 1825 | if((cmd_count = smtp_write_command(sx, |
4e910c01 JH |
1826 | flags & tc_reap_prev ? SCMD_FLUSH : SCMD_MORE, |
1827 | "BDAT %u%s\r\n", chunk_size, flags & tc_chunk_last ? " LAST" : "") | |
e027f545 | 1828 | ) < 0) return ERROR; |
87cb4a16 JH |
1829 | if (flags & tc_chunk_last) |
1830 | data_command = string_copy(big_buffer); /* Save for later error message */ | |
ee8b8090 JH |
1831 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
1832 | /* That command write could have been the one that made the connection. | |
1833 | Copy the fd from the client conn ctx (smtp transport specific) to the | |
1834 | generic transport ctx. */ | |
1835 | ||
1836 | if (new_conn) | |
1837 | tctx->u.fd = sx->outblock.cctx->sock; | |
1838 | #endif | |
87cb4a16 | 1839 | } |
e027f545 | 1840 | |
e9166683 | 1841 | prev_cmd_count = cmd_count += sx->cmd_count; |
6d5c916c | 1842 | |
e027f545 | 1843 | /* Reap responses for any previous, but not one we just emitted */ |
6d5c916c | 1844 | |
e027f545 JH |
1845 | if (chunk_size > 0) |
1846 | prev_cmd_count--; | |
e9166683 | 1847 | if (sx->pending_BDAT) |
e027f545 | 1848 | prev_cmd_count--; |
6d5c916c | 1849 | |
e027f545 | 1850 | if (flags & tc_reap_prev && prev_cmd_count > 0) |
6d5c916c | 1851 | { |
58fc5fb2 JH |
1852 | DEBUG(D_transport) debug_printf("look for %d responses" |
1853 | " for previous pipelined cmds\n", prev_cmd_count); | |
6d5c916c | 1854 | |
e9166683 | 1855 | switch(sync_responses(sx, prev_cmd_count, 0)) |
e027f545 JH |
1856 | { |
1857 | case 1: /* 2xx (only) => OK */ | |
e9166683 JH |
1858 | case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */ |
1859 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e027f545 JH |
1860 | case 0: break; /* No 2xx or 5xx, but no probs */ |
1861 | ||
1862 | case -1: /* Timeout on RCPT */ | |
ee8b8090 JH |
1863 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
1864 | case -4: /* non-2xx for pipelined banner or EHLO */ | |
1865 | #endif | |
e027f545 JH |
1866 | default: return ERROR; /* I/O error, or any MAIL/DATA error */ |
1867 | } | |
1868 | cmd_count = 1; | |
e9166683 | 1869 | if (!sx->pending_BDAT) |
e027f545 | 1870 | pipelining_active = FALSE; |
6d5c916c | 1871 | } |
e027f545 | 1872 | |
58fc5fb2 | 1873 | /* Reap response for an outstanding BDAT */ |
e027f545 | 1874 | |
e9166683 | 1875 | if (sx->pending_BDAT) |
e027f545 | 1876 | { |
58fc5fb2 JH |
1877 | DEBUG(D_transport) debug_printf("look for one response for BDAT\n"); |
1878 | ||
251b9eb4 | 1879 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', |
e027f545 JH |
1880 | ob->command_timeout)) |
1881 | { | |
e9166683 | 1882 | if (errno == 0 && sx->buffer[0] == '4') |
e027f545 JH |
1883 | { |
1884 | errno = ERRNO_DATA4XX; /*XXX does this actually get used? */ | |
36e55f49 | 1885 | sx->addrlist->more_errno |= |
e9166683 | 1886 | ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e027f545 JH |
1887 | } |
1888 | return ERROR; | |
1889 | } | |
1890 | cmd_count--; | |
e9166683 | 1891 | sx->pending_BDAT = FALSE; |
e027f545 JH |
1892 | pipelining_active = FALSE; |
1893 | } | |
1894 | else if (chunk_size > 0) | |
e9166683 | 1895 | sx->pending_BDAT = TRUE; |
e027f545 JH |
1896 | |
1897 | ||
e9166683 | 1898 | sx->cmd_count = cmd_count; |
e027f545 | 1899 | return OK; |
6d5c916c JH |
1900 | } |
1901 | ||
1902 | ||
1903 | ||
ee8b8090 JH |
1904 | |
1905 | ||
0756eb3c | 1906 | /************************************************* |
d093f8e5 | 1907 | * Make connection for given message * |
0756eb3c PH |
1908 | *************************************************/ |
1909 | ||
d093f8e5 JH |
1910 | /* |
1911 | Arguments: | |
1912 | ctx connection context | |
d093f8e5 JH |
1913 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for |
1914 | a second attempt after TLS initialization fails | |
d093f8e5 JH |
1915 | |
1916 | Returns: OK - the connection was made and the delivery attempted; | |
1917 | fd is set in the conn context, tls_out set up. | |
1918 | DEFER - the connection could not be made, or something failed | |
1919 | while setting up the SMTP session, or there was a | |
1920 | non-message-specific error, such as a timeout. | |
1921 | ERROR - helo_data or add_headers or authenticated_sender is | |
1922 | specified for this transport, and the string failed | |
1923 | to expand | |
1924 | */ | |
1925 | int | |
e9166683 | 1926 | smtp_setup_conn(smtp_context * sx, BOOL suppress_tls) |
d093f8e5 | 1927 | { |
c0635b6d | 1928 | #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE) |
d093f8e5 JH |
1929 | dns_answer tlsa_dnsa; |
1930 | #endif | |
ee8b8090 | 1931 | smtp_transport_options_block * ob = sx->conn_args.tblock->options_block; |
d093f8e5 | 1932 | BOOL pass_message = FALSE; |
d093f8e5 | 1933 | uschar * message = NULL; |
d093f8e5 JH |
1934 | int yield = OK; |
1935 | int rc; | |
1936 | ||
ee8b8090 | 1937 | sx->conn_args.ob = ob; |
d093f8e5 | 1938 | |
ee8b8090 JH |
1939 | sx->lmtp = strcmpic(ob->protocol, US"lmtp") == 0; |
1940 | sx->smtps = strcmpic(ob->protocol, US"smtps") == 0; | |
d093f8e5 JH |
1941 | sx->ok = FALSE; |
1942 | sx->send_rset = TRUE; | |
1943 | sx->send_quit = TRUE; | |
1944 | sx->setting_up = TRUE; | |
1945 | sx->esmtp = TRUE; | |
1946 | sx->esmtp_sent = FALSE; | |
59a286ef | 1947 | #ifdef SUPPORT_I18N |
d093f8e5 | 1948 | sx->utf8_needed = FALSE; |
59a286ef | 1949 | #endif |
d093f8e5 | 1950 | sx->dsn_all_lasthop = TRUE; |
c0635b6d | 1951 | #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE) |
d093f8e5 | 1952 | sx->dane = FALSE; |
8ac90765 | 1953 | sx->dane_required = |
ee8b8090 JH |
1954 | verify_check_given_host(CUSS &ob->hosts_require_dane, sx->conn_args.host) == OK; |
1955 | #endif | |
1956 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
1957 | sx->early_pipe_active = sx->early_pipe_ok = FALSE; | |
1958 | sx->ehlo_resp.cleartext_features = sx->ehlo_resp.crypted_features = 0; | |
1959 | sx->pending_BANNER = sx->pending_EHLO = FALSE; | |
d093f8e5 JH |
1960 | #endif |
1961 | ||
ee8b8090 | 1962 | if ((sx->max_rcpt = sx->conn_args.tblock->max_addresses) == 0) sx->max_rcpt = 999999; |
d093f8e5 | 1963 | sx->peer_offered = 0; |
14de8063 | 1964 | sx->avoid_option = 0; |
d093f8e5 | 1965 | sx->igquotstr = US""; |
ee8b8090 | 1966 | if (!sx->helo_data) sx->helo_data = ob->helo_data; |
d093f8e5 JH |
1967 | #ifdef EXPERIMENTAL_DSN_INFO |
1968 | sx->smtp_greeting = NULL; | |
1969 | sx->helo_response = NULL; | |
59a286ef JH |
1970 | #endif |
1971 | ||
0756eb3c | 1972 | smtp_command = US"initial connection"; |
d093f8e5 | 1973 | sx->buffer[0] = '\0'; |
0756eb3c PH |
1974 | |
1975 | /* Set up the buffer for reading SMTP response packets. */ | |
1976 | ||
d093f8e5 JH |
1977 | sx->inblock.buffer = sx->inbuffer; |
1978 | sx->inblock.buffersize = sizeof(sx->inbuffer); | |
1979 | sx->inblock.ptr = sx->inbuffer; | |
1980 | sx->inblock.ptrend = sx->inbuffer; | |
0756eb3c PH |
1981 | |
1982 | /* Set up the buffer for holding SMTP commands while pipelining */ | |
1983 | ||
d093f8e5 JH |
1984 | sx->outblock.buffer = sx->outbuffer; |
1985 | sx->outblock.buffersize = sizeof(sx->outbuffer); | |
1986 | sx->outblock.ptr = sx->outbuffer; | |
1987 | sx->outblock.cmd_count = 0; | |
1988 | sx->outblock.authenticating = FALSE; | |
ee8b8090 | 1989 | sx->outblock.conn_args = NULL; |
0756eb3c | 1990 | |
6c512171 PH |
1991 | /* Reset the parameters of a TLS session. */ |
1992 | ||
817d9f57 JH |
1993 | tls_out.bits = 0; |
1994 | tls_out.cipher = NULL; /* the one we may use for this transport */ | |
9d1c15ef JH |
1995 | tls_out.ourcert = NULL; |
1996 | tls_out.peercert = NULL; | |
817d9f57 JH |
1997 | tls_out.peerdn = NULL; |
1998 | #if defined(SUPPORT_TLS) && !defined(USE_GNUTLS) | |
1999 | tls_out.sni = NULL; | |
5b456975 | 2000 | #endif |
018058b2 | 2001 | tls_out.ocsp = OCSP_NOT_REQ; |
6c512171 | 2002 | |
35aba663 JH |
2003 | /* Flip the legacy TLS-related variables over to the outbound set in case |
2004 | they're used in the context of the transport. Don't bother resetting | |
02b41d71 JH |
2005 | afterward (when being used by a transport) as we're in a subprocess. |
2006 | For verify, unflipped once the callout is dealt with */ | |
35aba663 JH |
2007 | |
2008 | tls_modify_variables(&tls_out); | |
2009 | ||
061b7ebd | 2010 | #ifndef SUPPORT_TLS |
d093f8e5 | 2011 | if (sx->smtps) |
061b7ebd | 2012 | { |
d093f8e5 | 2013 | set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available", |
895fbaf2 | 2014 | DEFER, FALSE); |
018058b2 | 2015 | return ERROR; |
061b7ebd PP |
2016 | } |
2017 | #endif | |
2018 | ||
0756eb3c PH |
2019 | /* Make a connection to the host if this isn't a continued delivery, and handle |
2020 | the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled | |
2021 | specially so they can be identified for retries. */ | |
2022 | ||
58c30e47 | 2023 | if (!continue_hostname) |
0756eb3c | 2024 | { |
e9166683 | 2025 | if (sx->verify) |
ee8b8090 | 2026 | HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->conn_args.interface, sx->port); |
02b41d71 | 2027 | |
ee8b8090 | 2028 | /* Get the actual port the connection will use, into sx->conn_args.host */ |
4311097e | 2029 | |
ee8b8090 | 2030 | smtp_port_for_connect(sx->conn_args.host, sx->port); |
0756eb3c | 2031 | |
c0635b6d | 2032 | #if defined(SUPPORT_TLS) && defined(SUPPORT_DANE) |
58c30e47 | 2033 | /* Do TLSA lookup for DANE */ |
0e66b3b6 | 2034 | { |
0e66b3b6 JH |
2035 | tls_out.dane_verified = FALSE; |
2036 | tls_out.tlsa_usage = 0; | |
2037 | ||
ee8b8090 | 2038 | if (sx->conn_args.host->dnssec == DS_YES) |
0e66b3b6 | 2039 | { |
d093f8e5 | 2040 | if( sx->dane_required |
ee8b8090 | 2041 | || verify_check_given_host(CUSS &ob->hosts_try_dane, sx->conn_args.host) == OK |
0e66b3b6 | 2042 | ) |
ee8b8090 | 2043 | switch (rc = tlsa_lookup(sx->conn_args.host, &tlsa_dnsa, sx->dane_required)) |
4b0fe319 | 2044 | { |
58c30e47 | 2045 | case OK: sx->dane = TRUE; |
ee8b8090 | 2046 | ob->tls_tempfail_tryclear = FALSE; |
58c30e47 | 2047 | break; |
2d5fdd53 | 2048 | case FAIL_FORCED: break; |
d093f8e5 | 2049 | default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
2d5fdd53 JH |
2050 | string_sprintf("DANE error: tlsa lookup %s", |
2051 | rc == DEFER ? "DEFER" : "FAIL"), | |
2052 | rc, FALSE); | |
8d3dc239 | 2053 | # ifndef DISABLE_EVENT |
ee8b8090 | 2054 | (void) event_raise(sx->conn_args.tblock->event_action, |
c4b57fdd JH |
2055 | US"dane:fail", sx->dane_required |
2056 | ? US"dane-required" : US"dnssec-invalid"); | |
8d3dc239 | 2057 | # endif |
2d5fdd53 | 2058 | return rc; |
4b0fe319 | 2059 | } |
0e66b3b6 | 2060 | } |
d093f8e5 | 2061 | else if (sx->dane_required) |
0e66b3b6 | 2062 | { |
d093f8e5 | 2063 | set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
ee8b8090 | 2064 | string_sprintf("DANE error: %s lookup not DNSSEC", sx->conn_args.host->name), |
895fbaf2 | 2065 | FAIL, FALSE); |
8d3dc239 | 2066 | # ifndef DISABLE_EVENT |
ee8b8090 | 2067 | (void) event_raise(sx->conn_args.tblock->event_action, |
c4b57fdd | 2068 | US"dane:fail", US"dane-required"); |
8d3dc239 | 2069 | # endif |
4b0fe319 | 2070 | return FAIL; |
0e66b3b6 | 2071 | } |
0e66b3b6 JH |
2072 | } |
2073 | #endif /*DANE*/ | |
2074 | ||
58c30e47 JH |
2075 | /* Make the TCP connection */ |
2076 | ||
74f1a423 JH |
2077 | sx->cctx.tls_ctx = NULL; |
2078 | sx->inblock.cctx = sx->outblock.cctx = &sx->cctx; | |
ee8b8090 | 2079 | sx->avoid_option = sx->peer_offered = smtp_peer_options = 0; |
58c30e47 | 2080 | |
ee8b8090 JH |
2081 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2082 | if (verify_check_given_host(CUSS &ob->hosts_pipe_connect, sx->conn_args.host) == OK) | |
58c30e47 | 2083 | { |
ee8b8090 JH |
2084 | sx->early_pipe_ok = TRUE; |
2085 | if ( read_ehlo_cache_entry(sx) | |
2086 | && sx->ehlo_resp.cleartext_features & OPTION_EARLY_PIPE) | |
58c30e47 | 2087 | { |
ee8b8090 JH |
2088 | DEBUG(D_transport) debug_printf("Using cached cleartext PIPE_CONNECT\n"); |
2089 | sx->early_pipe_active = TRUE; | |
2090 | sx->peer_offered = sx->ehlo_resp.cleartext_features; | |
58c30e47 | 2091 | } |
58c30e47 JH |
2092 | } |
2093 | ||
ee8b8090 JH |
2094 | if (sx->early_pipe_active) |
2095 | sx->outblock.conn_args = &sx->conn_args; | |
2096 | else | |
2097 | #endif | |
2098 | { | |
2099 | if ((sx->cctx.sock = smtp_connect(&sx->conn_args, NULL)) < 0) | |
2100 | { | |
2101 | uschar * msg = NULL; | |
2102 | if (sx->verify) | |
2103 | { | |
2104 | msg = US strerror(errno); | |
2105 | HDEBUG(D_verify) debug_printf("connect: %s\n", msg); | |
2106 | } | |
2107 | set_errno_nohost(sx->addrlist, | |
2108 | errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno, | |
2109 | sx->verify ? string_sprintf("could not connect: %s", msg) | |
2110 | : NULL, | |
2111 | DEFER, FALSE); | |
2112 | sx->send_quit = FALSE; | |
2113 | return DEFER; | |
2114 | } | |
2115 | } | |
41c7c167 PH |
2116 | /* Expand the greeting message while waiting for the initial response. (Makes |
2117 | sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is | |
2118 | delayed till here so that $sending_interface and $sending_port are set. */ | |
ee8b8090 JH |
2119 | /*XXX early-pipe: they still will not be. Is there any way to find out what they |
2120 | will be? Somehow I doubt it. */ | |
41c7c167 | 2121 | |
02b41d71 JH |
2122 | if (sx->helo_data) |
2123 | if (!(sx->helo_data = expand_string(sx->helo_data))) | |
e9166683 | 2124 | if (sx->verify) |
02b41d71 JH |
2125 | log_write(0, LOG_MAIN|LOG_PANIC, |
2126 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
2127 | sx->addrlist->address, expand_string_message); | |
2128 | ||
8c5d388a | 2129 | #ifdef SUPPORT_I18N |
d093f8e5 | 2130 | if (sx->helo_data) |
810d16ad | 2131 | { |
02b41d71 JH |
2132 | expand_string_message = NULL; |
2133 | if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data, | |
2134 | &expand_string_message)), | |
2135 | expand_string_message) | |
e9166683 | 2136 | if (sx->verify) |
02b41d71 JH |
2137 | log_write(0, LOG_MAIN|LOG_PANIC, |
2138 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
2139 | sx->addrlist->address, expand_string_message); | |
2140 | else | |
2141 | sx->helo_data = NULL; | |
810d16ad JH |
2142 | } |
2143 | #endif | |
41c7c167 | 2144 | |
0756eb3c PH |
2145 | /* The first thing is to wait for an initial OK response. The dreaded "goto" |
2146 | is nevertheless a reasonably clean way of programming this kind of logic, | |
2147 | where you want to escape on any error. */ | |
2148 | ||
d093f8e5 | 2149 | if (!sx->smtps) |
061b7ebd | 2150 | { |
ee8b8090 JH |
2151 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2152 | if (sx->early_pipe_active) | |
2153 | { | |
2154 | sx->pending_BANNER = TRUE; /* sync_responses() must eventually handle */ | |
2155 | sx->outblock.cmd_count = 1; | |
2156 | } | |
2157 | else | |
8d330698 | 2158 | #endif |
ee8b8090 JH |
2159 | { |
2160 | #ifdef TCP_QUICKACK | |
2161 | (void) setsockopt(sx->cctx.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, | |
2162 | sizeof(off)); | |
895fbaf2 | 2163 | #endif |
ee8b8090 JH |
2164 | if (!smtp_reap_banner(sx)) |
2165 | goto RESPONSE_FAILED; | |
2166 | } | |
0756eb3c | 2167 | |
0cbf2b82 | 2168 | #ifndef DISABLE_EVENT |
b30275b8 | 2169 | { |
805c9d53 | 2170 | uschar * s; |
ee8b8090 JH |
2171 | lookup_dnssec_authenticated = sx->conn_args.host->dnssec==DS_YES ? US"yes" |
2172 | : sx->conn_args.host->dnssec==DS_NO ? US"no" : NULL; | |
2173 | s = event_raise(sx->conn_args.tblock->event_action, US"smtp:connect", sx->buffer); | |
b30275b8 | 2174 | if (s) |
a7538db1 | 2175 | { |
d093f8e5 | 2176 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, |
b30275b8 | 2177 | string_sprintf("deferred by smtp:connect event expansion: %s", s), |
895fbaf2 | 2178 | DEFER, FALSE); |
a7538db1 JH |
2179 | yield = DEFER; |
2180 | goto SEND_QUIT; | |
2181 | } | |
b30275b8 | 2182 | } |
a7538db1 JH |
2183 | #endif |
2184 | ||
061b7ebd PP |
2185 | /* Now check if the helo_data expansion went well, and sign off cleanly if |
2186 | it didn't. */ | |
41c7c167 | 2187 | |
d093f8e5 | 2188 | if (!sx->helo_data) |
061b7ebd | 2189 | { |
d093f8e5 | 2190 | message = string_sprintf("failed to expand helo_data: %s", |
061b7ebd | 2191 | expand_string_message); |
d093f8e5 | 2192 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
061b7ebd PP |
2193 | yield = DEFER; |
2194 | goto SEND_QUIT; | |
2195 | } | |
41c7c167 PH |
2196 | } |
2197 | ||
0756eb3c | 2198 | /** Debugging without sending a message |
d093f8e5 | 2199 | sx->addrlist->transport_return = DEFER; |
0756eb3c PH |
2200 | goto SEND_QUIT; |
2201 | **/ | |
2202 | ||
2203 | /* Errors that occur after this point follow an SMTP command, which is | |
2204 | left in big_buffer by smtp_write_command() for use in error messages. */ | |
2205 | ||
2206 | smtp_command = big_buffer; | |
2207 | ||
2208 | /* Tell the remote who we are... | |
2209 | ||
2210 | February 1998: A convention has evolved that ESMTP-speaking MTAs include the | |
2211 | string "ESMTP" in their greeting lines, so make Exim send EHLO if the | |
2212 | greeting is of this form. The assumption was that the far end supports it | |
2213 | properly... but experience shows that there are some that give 5xx responses, | |
2214 | even though the banner includes "ESMTP" (there's a bloody-minded one that | |
2215 | says "ESMTP not spoken here"). Cope with that case. | |
2216 | ||
2217 | September 2000: Time has passed, and it seems reasonable now to always send | |
2218 | EHLO at the start. It is also convenient to make the change while installing | |
2219 | the TLS stuff. | |
2220 | ||
2221 | July 2003: Joachim Wieland met a broken server that advertises "PIPELINING" | |
2222 | but times out after sending MAIL FROM, RCPT TO and DATA all together. There | |
2223 | would be no way to send out the mails, so there is now a host list | |
2224 | "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the | |
2225 | PIPELINING problem as well. Maybe it can also be useful to cure other | |
2226 | problems with broken servers. | |
2227 | ||
2228 | Exim originally sent "Helo" at this point and ran for nearly a year that way. | |
2229 | Then somebody tried it with a Microsoft mailer... It seems that all other | |
2230 | mailers use upper case for some reason (the RFC is quite clear about case | |
2231 | independence) so, for peace of mind, I gave in. */ | |
2232 | ||
ee8b8090 | 2233 | sx->esmtp = verify_check_given_host(CUSS &ob->hosts_avoid_esmtp, sx->conn_args.host) != OK; |
0756eb3c | 2234 | |
061b7ebd PP |
2235 | /* Alas; be careful, since this goto is not an error-out, so conceivably |
2236 | we might set data between here and the target which we assume to exist | |
2237 | and be usable. I can see this coming back to bite us. */ | |
a7538db1 | 2238 | #ifdef SUPPORT_TLS |
d093f8e5 | 2239 | if (sx->smtps) |
061b7ebd | 2240 | { |
14de8063 | 2241 | smtp_peer_options |= OPTION_TLS; |
061b7ebd | 2242 | suppress_tls = FALSE; |
ee8b8090 | 2243 | ob->tls_tempfail_tryclear = FALSE; |
061b7ebd PP |
2244 | smtp_command = US"SSL-on-connect"; |
2245 | goto TLS_NEGOTIATE; | |
2246 | } | |
a7538db1 | 2247 | #endif |
061b7ebd | 2248 | |
d093f8e5 | 2249 | if (sx->esmtp) |
0756eb3c | 2250 | { |
ee8b8090 JH |
2251 | if (smtp_write_command(sx, |
2252 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
2253 | sx->early_pipe_active ? SCMD_BUFFER : | |
2254 | #endif | |
2255 | SCMD_FLUSH, | |
2256 | "%s %s\r\n", sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0) | |
0756eb3c | 2257 | goto SEND_FAILED; |
d093f8e5 | 2258 | sx->esmtp_sent = TRUE; |
ee8b8090 JH |
2259 | |
2260 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
2261 | if (sx->early_pipe_active) | |
0756eb3c | 2262 | { |
ee8b8090 JH |
2263 | sx->pending_EHLO = TRUE; |
2264 | ||
2265 | /* If we have too many authenticators to handle and might need to AUTH | |
2266 | for this transport, pipeline no further as we will need the | |
2267 | list of auth methods offered. Reap the banner and EHLO. */ | |
2268 | ||
2269 | if ( (ob->hosts_require_auth || ob->hosts_try_auth) | |
2270 | && f.smtp_in_early_pipe_no_auth) | |
895fbaf2 | 2271 | { |
ee8b8090 JH |
2272 | DEBUG(D_transport) debug_printf("may need to auth, so pipeline no further\n"); |
2273 | if (smtp_write_command(sx, SCMD_FLUSH, NULL) < 0) | |
2274 | goto SEND_FAILED; | |
2275 | if (sync_responses(sx, 2, 0) != 0) | |
2276 | { | |
2277 | HDEBUG(D_transport) | |
2278 | debug_printf("failed reaping pipelined cmd responses\n"); | |
2279 | goto RESPONSE_FAILED; | |
2280 | } | |
2281 | sx->early_pipe_active = FALSE; | |
895fbaf2 | 2282 | } |
0756eb3c | 2283 | } |
ee8b8090 | 2284 | else |
895fbaf2 | 2285 | #endif |
ee8b8090 JH |
2286 | if (!smtp_reap_ehlo(sx)) |
2287 | goto RESPONSE_FAILED; | |
0756eb3c PH |
2288 | } |
2289 | else | |
0756eb3c PH |
2290 | DEBUG(D_transport) |
2291 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
0756eb3c | 2292 | |
ee8b8090 JH |
2293 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2294 | if (!sx->early_pipe_active) | |
2295 | #endif | |
2296 | if (!sx->esmtp) | |
2297 | { | |
2298 | BOOL good_response; | |
2299 | int n = sizeof(sx->buffer); | |
2300 | uschar * rsp = sx->buffer; | |
a57ce043 | 2301 | |
ee8b8090 JH |
2302 | if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2) |
2303 | { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; } | |
895fbaf2 | 2304 | |
ee8b8090 JH |
2305 | if (smtp_write_command(sx, SCMD_FLUSH, "HELO %s\r\n", sx->helo_data) < 0) |
2306 | goto SEND_FAILED; | |
2307 | good_response = smtp_read_response(sx, rsp, n, '2', ob->command_timeout); | |
895fbaf2 | 2308 | #ifdef EXPERIMENTAL_DSN_INFO |
ee8b8090 | 2309 | sx->helo_response = string_copy(rsp); |
895fbaf2 | 2310 | #endif |
ee8b8090 | 2311 | if (!good_response) |
a57ce043 | 2312 | { |
ee8b8090 JH |
2313 | /* Handle special logging for a closed connection after HELO |
2314 | when had previously sent EHLO */ | |
2315 | ||
2316 | if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET)) | |
2317 | { | |
2318 | errno = ERRNO_SMTPCLOSED; | |
2319 | goto EHLOHELO_FAILED; | |
2320 | } | |
2321 | memmove(sx->buffer, rsp, Ustrlen(rsp)); | |
2322 | goto RESPONSE_FAILED; | |
a57ce043 | 2323 | } |
a57ce043 | 2324 | } |
2d14f397 | 2325 | |
d093f8e5 | 2326 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 2327 | { |
ee8b8090 JH |
2328 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2329 | if (!sx->early_pipe_active) | |
2330 | #endif | |
2331 | { | |
2332 | sx->peer_offered = ehlo_response(sx->buffer, | |
2333 | OPTION_TLS /* others checked later */ | |
2334 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
2335 | | (sx->early_pipe_ok | |
2336 | ? OPTION_IGNQ | |
2337 | | OPTION_CHUNKING | OPTION_PRDR | OPTION_DSN | OPTION_PIPE | OPTION_SIZE | |
2338 | #ifdef SUPPORT_I18N | |
2339 | | OPTION_UTF8 | |
2340 | #endif | |
2341 | | OPTION_EARLY_PIPE | |
2342 | : 0 | |
2343 | ) | |
2344 | #endif | |
2345 | ); | |
2346 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
2347 | if (sx->early_pipe_ok) | |
2348 | { | |
2349 | sx->ehlo_resp.cleartext_features = sx->peer_offered; | |
2350 | ||
2351 | if ( (sx->peer_offered & (OPTION_PIPE | OPTION_EARLY_PIPE)) | |
2352 | == (OPTION_PIPE | OPTION_EARLY_PIPE)) | |
2353 | { | |
2354 | DEBUG(D_transport) debug_printf("PIPE_CONNECT usable in future for this IP\n"); | |
2355 | sx->ehlo_resp.cleartext_auths = study_ehlo_auths(sx); | |
2356 | write_ehlo_cache_entry(sx); | |
2357 | } | |
2358 | } | |
2359 | #endif | |
2360 | } | |
f1513293 | 2361 | |
0756eb3c PH |
2362 | /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */ |
2363 | ||
a7538db1 | 2364 | #ifdef SUPPORT_TLS |
14de8063 | 2365 | smtp_peer_options |= sx->peer_offered & OPTION_TLS; |
7ade712c | 2366 | #endif |
2d14f397 | 2367 | } |
0756eb3c PH |
2368 | } |
2369 | ||
57cc2785 JH |
2370 | /* For continuing deliveries down the same channel, having re-exec'd the socket |
2371 | is the standard input; for a socket held open from verify it is recorded | |
2372 | in the cutthrough context block. Either way we don't need to redo EHLO here | |
2373 | (but may need to do so for TLS - see below). | |
2374 | Set up the pointer to where subsequent commands will be left, for | |
2d14f397 | 2375 | error messages. Note that smtp_peer_options will have been |
0756eb3c PH |
2376 | set from the command line if they were set in the process that passed the |
2377 | connection on. */ | |
2378 | ||
895fbaf2 | 2379 | /*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c |
4c04137d | 2380 | as the continue goes via transport_pass_socket() and doublefork and exec. |
895fbaf2 JH |
2381 | It does not wait. Unclear how we keep separate host's responses |
2382 | separate - we could match up by host ip+port as a bodge. */ | |
2383 | ||
0756eb3c PH |
2384 | else |
2385 | { | |
74f1a423 | 2386 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
57cc2785 | 2387 | { |
74f1a423 | 2388 | sx->cctx = cutthrough.cctx; |
ee8b8090 | 2389 | sx->conn_args.host->port = sx->port = cutthrough.host.port; |
57cc2785 JH |
2390 | } |
2391 | else | |
2392 | { | |
74f1a423 JH |
2393 | sx->cctx.sock = 0; /* stdin */ |
2394 | sx->cctx.tls_ctx = NULL; | |
ee8b8090 | 2395 | smtp_port_for_connect(sx->conn_args.host, sx->port); /* Record the port that was used */ |
57cc2785 | 2396 | } |
74f1a423 | 2397 | sx->inblock.cctx = sx->outblock.cctx = &sx->cctx; |
0756eb3c | 2398 | smtp_command = big_buffer; |
02b41d71 | 2399 | sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */ |
875512a3 | 2400 | |
57cc2785 JH |
2401 | /* For a continued connection with TLS being proxied for us, or a |
2402 | held-open verify connection with TLS, nothing more to do. */ | |
875512a3 | 2403 | |
57cc2785 | 2404 | if ( continue_proxy_cipher |
74f1a423 JH |
2405 | || (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only |
2406 | && cutthrough.is_tls) | |
57cc2785 | 2407 | ) |
875512a3 JH |
2408 | { |
2409 | sx->peer_offered = smtp_peer_options; | |
7c576fca | 2410 | sx->pipelining_used = pipelining_active = !!(smtp_peer_options & OPTION_PIPE); |
57cc2785 JH |
2411 | HDEBUG(D_transport) debug_printf("continued connection, %s TLS\n", |
2412 | continue_proxy_cipher ? "proxied" : "verify conn with"); | |
875512a3 JH |
2413 | return OK; |
2414 | } | |
2415 | HDEBUG(D_transport) debug_printf("continued connection, no TLS\n"); | |
0756eb3c PH |
2416 | } |
2417 | ||
2418 | /* If TLS is available on this connection, whether continued or not, attempt to | |
2419 | start up a TLS session, unless the host is in hosts_avoid_tls. If successful, | |
2420 | send another EHLO - the server may give a different answer in secure mode. We | |
2421 | use a separate buffer for reading the response to STARTTLS so that if it is | |
2422 | negative, the original EHLO data is available for subsequent analysis, should | |
2423 | the client not be required to use TLS. If the response is bad, copy the buffer | |
2424 | for error analysis. */ | |
2425 | ||
2426 | #ifdef SUPPORT_TLS | |
14de8063 | 2427 | if ( smtp_peer_options & OPTION_TLS |
5130845b | 2428 | && !suppress_tls |
ee8b8090 | 2429 | && verify_check_given_host(CUSS &ob->hosts_avoid_tls, sx->conn_args.host) != OK |
e9166683 | 2430 | && ( !sx->verify |
ee8b8090 | 2431 | || verify_check_given_host(CUSS &ob->hosts_verify_avoid_tls, sx->conn_args.host) != OK |
02b41d71 | 2432 | ) ) |
0756eb3c PH |
2433 | { |
2434 | uschar buffer2[4096]; | |
ee8b8090 | 2435 | |
251b9eb4 | 2436 | if (smtp_write_command(sx, SCMD_FLUSH, "STARTTLS\r\n") < 0) |
0756eb3c PH |
2437 | goto SEND_FAILED; |
2438 | ||
ee8b8090 JH |
2439 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2440 | /* If doing early-pipelining reap the banner and EHLO-response but leave | |
2441 | the response for the STARTTLS we just sent alone. */ | |
2442 | ||
2443 | if (sx->early_pipe_active && sync_responses(sx, 2, 0) != 0) | |
2444 | { | |
2445 | HDEBUG(D_transport) | |
2446 | debug_printf("failed reaping pipelined cmd responses\n"); | |
2447 | goto RESPONSE_FAILED; | |
2448 | } | |
2449 | #endif | |
2450 | ||
0756eb3c PH |
2451 | /* If there is an I/O error, transmission of this message is deferred. If |
2452 | there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is | |
2453 | false, we also defer. However, if there is a temporary rejection of STARTTLS | |
2454 | and tls_tempfail_tryclear is true, or if there is an outright rejection of | |
2455 | STARTTLS, we carry on. This means we will try to send the message in clear, | |
2456 | unless the host is in hosts_require_tls (tested below). */ | |
2457 | ||
ee8b8090 | 2458 | if (!smtp_read_response(sx, buffer2, sizeof(buffer2), '2', ob->command_timeout)) |
0756eb3c | 2459 | { |
4b0fe319 JH |
2460 | if ( errno != 0 |
2461 | || buffer2[0] == 0 | |
ee8b8090 | 2462 | || (buffer2[0] == '4' && !ob->tls_tempfail_tryclear) |
4b0fe319 | 2463 | ) |
0dda4340 | 2464 | { |
d093f8e5 | 2465 | Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer)); |
9e7e0f6a | 2466 | sx->buffer[sizeof(sx->buffer)-1] = '\0'; |
0756eb3c | 2467 | goto RESPONSE_FAILED; |
0dda4340 | 2468 | } |
0756eb3c PH |
2469 | } |
2470 | ||
2471 | /* STARTTLS accepted: try to negotiate a TLS session. */ | |
2472 | ||
2473 | else | |
061b7ebd | 2474 | TLS_NEGOTIATE: |
0756eb3c | 2475 | { |
d093f8e5 | 2476 | address_item * addr; |
cf0c6164 | 2477 | uschar * errstr; |
ee8b8090 JH |
2478 | sx->cctx.tls_ctx = tls_client_start(sx->cctx.sock, sx->conn_args.host, |
2479 | sx->addrlist, sx->conn_args.tblock, | |
c0635b6d | 2480 | # ifdef SUPPORT_DANE |
cf0c6164 | 2481 | sx->dane ? &tlsa_dnsa : NULL, |
0e66b3b6 | 2482 | # endif |
74f1a423 | 2483 | &tls_out, &errstr); |
0756eb3c | 2484 | |
74f1a423 | 2485 | if (!sx->cctx.tls_ctx) |
0756eb3c | 2486 | { |
74f1a423 JH |
2487 | /* TLS negotiation failed; give an error. From outside, this function may |
2488 | be called again to try in clear on a new connection, if the options permit | |
2489 | it for this host. */ | |
8008accd | 2490 | DEBUG(D_tls) debug_printf("TLS session fail: %s\n", errstr); |
74f1a423 | 2491 | |
c0635b6d | 2492 | # ifdef SUPPORT_DANE |
c4b57fdd JH |
2493 | if (sx->dane) |
2494 | { | |
2495 | log_write(0, LOG_MAIN, | |
cf0c6164 | 2496 | "DANE attempt failed; TLS connection to %s [%s]: %s", |
ee8b8090 | 2497 | sx->conn_args.host->name, sx->conn_args.host->address, errstr); |
8d3dc239 | 2498 | # ifndef DISABLE_EVENT |
ee8b8090 | 2499 | (void) event_raise(sx->conn_args.tblock->event_action, |
c4b57fdd | 2500 | US"dane:fail", US"validation-failure"); /* could do with better detail */ |
8d3dc239 | 2501 | # endif |
c4b57fdd | 2502 | } |
6ebd79ec JH |
2503 | # endif |
2504 | ||
de6273b4 | 2505 | errno = ERRNO_TLSFAILURE; |
cf0c6164 | 2506 | message = string_sprintf("TLS session: %s", errstr); |
d093f8e5 | 2507 | sx->send_quit = FALSE; |
0756eb3c PH |
2508 | goto TLS_FAILED; |
2509 | } | |
2510 | ||
2511 | /* TLS session is set up */ | |
2512 | ||
2d14f397 | 2513 | smtp_peer_options_wrap = smtp_peer_options; |
d093f8e5 | 2514 | for (addr = sx->addrlist; addr; addr = addr->next) |
5ca2a9a1 PH |
2515 | if (addr->transport_return == PENDING_DEFER) |
2516 | { | |
817d9f57 | 2517 | addr->cipher = tls_out.cipher; |
9d1c15ef JH |
2518 | addr->ourcert = tls_out.ourcert; |
2519 | addr->peercert = tls_out.peercert; | |
817d9f57 | 2520 | addr->peerdn = tls_out.peerdn; |
018058b2 | 2521 | addr->ocsp = tls_out.ocsp; |
5ca2a9a1 | 2522 | } |
0756eb3c PH |
2523 | } |
2524 | } | |
2525 | ||
061b7ebd PP |
2526 | /* if smtps, we'll have smtp_command set to something else; always safe to |
2527 | reset it here. */ | |
2528 | smtp_command = big_buffer; | |
2529 | ||
41c7c167 PH |
2530 | /* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If |
2531 | helo_data is null, we are dealing with a connection that was passed from | |
2532 | another process, and so we won't have expanded helo_data above. We have to | |
2533 | expand it here. $sending_ip_address and $sending_port are set up right at the | |
2534 | start of the Exim process (in exim.c). */ | |
0756eb3c | 2535 | |
74f1a423 | 2536 | if (tls_out.active.sock >= 0) |
0756eb3c | 2537 | { |
ee8b8090 | 2538 | uschar * greeting_cmd; |
895fbaf2 | 2539 | |
ee8b8090 | 2540 | if (!sx->helo_data && !(sx->helo_data = expand_string(ob->helo_data))) |
41c7c167 | 2541 | { |
d093f8e5 JH |
2542 | uschar *message = string_sprintf("failed to expand helo_data: %s", |
2543 | expand_string_message); | |
2544 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
2545 | yield = DEFER; | |
2546 | goto SEND_QUIT; | |
41c7c167 PH |
2547 | } |
2548 | ||
ee8b8090 JH |
2549 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2550 | /* For SMTPS there is no cleartext early-pipe; use the crypted permission bit. | |
2551 | We're unlikely to get the group sent and delivered before the server sends its | |
2552 | banner, but it's still worth sending as a group. | |
2553 | For STARTTLS allow for cleartext early-pipe but no crypted early-pipe, but not | |
2554 | the reverse. */ | |
2555 | ||
2556 | if (sx->smtps ? sx->early_pipe_ok : sx->early_pipe_active) | |
2557 | { | |
2558 | sx->peer_offered = sx->ehlo_resp.crypted_features; | |
2559 | if ((sx->early_pipe_active = | |
2560 | !!(sx->ehlo_resp.crypted_features & OPTION_EARLY_PIPE))) | |
2561 | DEBUG(D_transport) debug_printf("Using cached crypted PIPE_CONNECT\n"); | |
2562 | } | |
2563 | #endif | |
2564 | ||
0d0e4455 | 2565 | /* For SMTPS we need to wait for the initial OK response. */ |
d093f8e5 | 2566 | if (sx->smtps) |
ee8b8090 JH |
2567 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2568 | if (sx->early_pipe_active) | |
2569 | { | |
2570 | sx->pending_BANNER = TRUE; | |
2571 | sx->outblock.cmd_count = 1; | |
2572 | } | |
2573 | else | |
895fbaf2 | 2574 | #endif |
ee8b8090 JH |
2575 | if (!smtp_reap_banner(sx)) |
2576 | goto RESPONSE_FAILED; | |
0d0e4455 | 2577 | |
ee8b8090 JH |
2578 | if (sx->lmtp) |
2579 | greeting_cmd = US"LHLO"; | |
2580 | else if (sx->esmtp) | |
2581 | greeting_cmd = US"EHLO"; | |
0d0e4455 PP |
2582 | else |
2583 | { | |
ee8b8090 | 2584 | greeting_cmd = US"HELO"; |
0d0e4455 PP |
2585 | DEBUG(D_transport) |
2586 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
061b7ebd PP |
2587 | } |
2588 | ||
ee8b8090 JH |
2589 | if (smtp_write_command(sx, |
2590 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
2591 | sx->early_pipe_active ? SCMD_BUFFER : | |
2592 | #endif | |
2593 | SCMD_FLUSH, | |
2594 | "%s %s\r\n", greeting_cmd, sx->helo_data) < 0) | |
0756eb3c | 2595 | goto SEND_FAILED; |
ee8b8090 JH |
2596 | |
2597 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
2598 | if (sx->early_pipe_active) | |
2599 | sx->pending_EHLO = TRUE; | |
2600 | else | |
895fbaf2 | 2601 | #endif |
ee8b8090 JH |
2602 | { |
2603 | if (!smtp_reap_ehlo(sx)) | |
2604 | goto RESPONSE_FAILED; | |
2605 | smtp_peer_options = 0; | |
2606 | } | |
0756eb3c PH |
2607 | } |
2608 | ||
2609 | /* If the host is required to use a secure channel, ensure that we | |
2610 | have one. */ | |
2611 | ||
d093f8e5 | 2612 | else if ( sx->smtps |
c0635b6d | 2613 | # ifdef SUPPORT_DANE |
d093f8e5 | 2614 | || sx->dane |
8ac90765 JH |
2615 | # endif |
2616 | # ifdef EXPERIMENTAL_REQUIRETLS | |
2617 | || tls_requiretls & REQUIRETLS_MSG | |
0e66b3b6 | 2618 | # endif |
ee8b8090 | 2619 | || verify_check_given_host(CUSS &ob->hosts_require_tls, sx->conn_args.host) == OK |
7a31d643 | 2620 | ) |
0756eb3c | 2621 | { |
8ac90765 JH |
2622 | errno = |
2623 | # ifdef EXPERIMENTAL_REQUIRETLS | |
2624 | tls_requiretls & REQUIRETLS_MSG ? ERRNO_REQUIRETLS : | |
2625 | # endif | |
2626 | ERRNO_TLSREQUIRED; | |
c562fd30 | 2627 | message = string_sprintf("a TLS session is required, but %s", |
14de8063 | 2628 | smtp_peer_options & OPTION_TLS |
2d14f397 | 2629 | ? "an attempt to start TLS failed" : "the server did not offer TLS support"); |
8d3dc239 | 2630 | # if defined(SUPPORT_DANE) && !defined(DISABLE_EVENT) |
c4b57fdd | 2631 | if (sx->dane) |
ee8b8090 | 2632 | (void) event_raise(sx->conn_args.tblock->event_action, US"dane:fail", |
c4b57fdd JH |
2633 | smtp_peer_options & OPTION_TLS |
2634 | ? US"validation-failure" /* could do with better detail */ | |
2635 | : US"starttls-not-supported"); | |
2636 | # endif | |
0756eb3c PH |
2637 | goto TLS_FAILED; |
2638 | } | |
0e66b3b6 | 2639 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
2640 | |
2641 | /* If TLS is active, we have just started it up and re-done the EHLO command, | |
2642 | so its response needs to be analyzed. If TLS is not active and this is a | |
2643 | continued session down a previously-used socket, we haven't just done EHLO, so | |
2644 | we skip this. */ | |
2645 | ||
2646 | if (continue_hostname == NULL | |
a7538db1 | 2647 | #ifdef SUPPORT_TLS |
74f1a423 | 2648 | || tls_out.active.sock >= 0 |
a7538db1 | 2649 | #endif |
0756eb3c PH |
2650 | ) |
2651 | { | |
d093f8e5 | 2652 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 2653 | { |
ee8b8090 JH |
2654 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2655 | if (!sx->early_pipe_active) | |
2656 | #endif | |
2657 | { | |
e9166683 | 2658 | sx->peer_offered = ehlo_response(sx->buffer, |
d093f8e5 | 2659 | 0 /* no TLS */ |
ee8b8090 JH |
2660 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2661 | | (sx->lmtp && ob->lmtp_ignore_quota ? OPTION_IGNQ : 0) | |
2662 | | OPTION_DSN | OPTION_PIPE | OPTION_SIZE | |
2663 | | OPTION_CHUNKING | OPTION_PRDR | OPTION_UTF8 | OPTION_REQUIRETLS | |
2664 | | (tls_out.active.sock >= 0 ? OPTION_EARLY_PIPE : 0) /* not for lmtp */ | |
2665 | ||
2666 | #else | |
2667 | ||
2668 | | (sx->lmtp && ob->lmtp_ignore_quota ? OPTION_IGNQ : 0) | |
14de8063 JH |
2669 | | OPTION_CHUNKING |
2670 | | OPTION_PRDR | |
ee8b8090 | 2671 | # ifdef SUPPORT_I18N |
14de8063 | 2672 | | (sx->addrlist->prop.utf8_msg ? OPTION_UTF8 : 0) |
d093f8e5 JH |
2673 | /*XXX if we hand peercaps on to continued-conn processes, |
2674 | must not depend on this addr */ | |
ee8b8090 | 2675 | # endif |
14de8063 JH |
2676 | | OPTION_DSN |
2677 | | OPTION_PIPE | |
ee8b8090 JH |
2678 | | (ob->size_addition >= 0 ? OPTION_SIZE : 0) |
2679 | # if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) | |
8ac90765 | 2680 | | (tls_requiretls & REQUIRETLS_MSG ? OPTION_REQUIRETLS : 0) |
ee8b8090 | 2681 | # endif |
8ac90765 | 2682 | #endif |
9094b84b | 2683 | ); |
ee8b8090 JH |
2684 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2685 | if (tls_out.active.sock >= 0) | |
2686 | sx->ehlo_resp.crypted_features = sx->peer_offered; | |
2687 | #endif | |
2688 | } | |
9094b84b | 2689 | |
2d14f397 JH |
2690 | /* Set for IGNOREQUOTA if the response to LHLO specifies support and the |
2691 | lmtp_ignore_quota option was set. */ | |
f1513293 | 2692 | |
14de8063 | 2693 | sx->igquotstr = sx->peer_offered & OPTION_IGNQ ? US" IGNOREQUOTA" : US""; |
f1513293 | 2694 | |
2d14f397 JH |
2695 | /* If the response to EHLO specified support for the SIZE parameter, note |
2696 | this, provided size_addition is non-negative. */ | |
f1513293 | 2697 | |
14de8063 | 2698 | smtp_peer_options |= sx->peer_offered & OPTION_SIZE; |
0756eb3c | 2699 | |
2d14f397 JH |
2700 | /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched |
2701 | the current host, esmtp will be false, so PIPELINING can never be used. If | |
2702 | the current host matches hosts_avoid_pipelining, don't do it. */ | |
0756eb3c | 2703 | |
14de8063 | 2704 | if ( sx->peer_offered & OPTION_PIPE |
ee8b8090 | 2705 | && verify_check_given_host(CUSS &ob->hosts_avoid_pipelining, sx->conn_args.host) != OK) |
14de8063 | 2706 | smtp_peer_options |= OPTION_PIPE; |
0756eb3c | 2707 | |
2d14f397 | 2708 | DEBUG(D_transport) debug_printf("%susing PIPELINING\n", |
14de8063 | 2709 | smtp_peer_options & OPTION_PIPE ? "" : "not "); |
0756eb3c | 2710 | |
14de8063 | 2711 | if ( sx->peer_offered & OPTION_CHUNKING |
ee8b8090 | 2712 | && verify_check_given_host(CUSS &ob->hosts_try_chunking, sx->conn_args.host) != OK) |
14de8063 | 2713 | sx->peer_offered &= ~OPTION_CHUNKING; |
f98442df | 2714 | |
14de8063 | 2715 | if (sx->peer_offered & OPTION_CHUNKING) |
ee8b8090 | 2716 | DEBUG(D_transport) debug_printf("CHUNKING usable\n"); |
0756eb3c | 2717 | |
8ccd00b1 | 2718 | #ifndef DISABLE_PRDR |
14de8063 | 2719 | if ( sx->peer_offered & OPTION_PRDR |
ee8b8090 | 2720 | && verify_check_given_host(CUSS &ob->hosts_try_prdr, sx->conn_args.host) != OK) |
14de8063 | 2721 | sx->peer_offered &= ~OPTION_PRDR; |
fd98a5c6 | 2722 | |
14de8063 | 2723 | if (sx->peer_offered & OPTION_PRDR) |
ee8b8090 | 2724 | DEBUG(D_transport) debug_printf("PRDR usable\n"); |
fd98a5c6 JH |
2725 | #endif |
2726 | ||
2d14f397 | 2727 | /* Note if the server supports DSN */ |
14de8063 | 2728 | smtp_peer_options |= sx->peer_offered & OPTION_DSN; |
2d14f397 | 2729 | DEBUG(D_transport) debug_printf("%susing DSN\n", |
14de8063 | 2730 | sx->peer_offered & OPTION_DSN ? "" : "not "); |
6c1c3d1d | 2731 | |
8ac90765 JH |
2732 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) |
2733 | if (sx->peer_offered & OPTION_REQUIRETLS) | |
2734 | { | |
2735 | smtp_peer_options |= OPTION_REQUIRETLS; | |
2736 | DEBUG(D_transport) debug_printf( | |
2737 | tls_requiretls & REQUIRETLS_MSG | |
2738 | ? "using REQUIRETLS\n" : "REQUIRETLS offered\n"); | |
2739 | } | |
2740 | #endif | |
2741 | ||
ee8b8090 JH |
2742 | #ifdef EXPERIMENTAL_PIPE_CONNECT |
2743 | if ( sx->early_pipe_ok | |
2744 | && !sx->early_pipe_active | |
2745 | && tls_out.active.sock >= 0 | |
2746 | && smtp_peer_options & OPTION_PIPE | |
2747 | && ( sx->ehlo_resp.cleartext_features | sx->ehlo_resp.crypted_features) | |
2748 | & OPTION_EARLY_PIPE) | |
2749 | { | |
2750 | DEBUG(D_transport) debug_printf("PIPE_CONNECT usable in future for this IP\n"); | |
2751 | sx->ehlo_resp.crypted_auths = study_ehlo_auths(sx); | |
2752 | write_ehlo_cache_entry(sx); | |
2753 | } | |
2754 | #endif | |
2755 | ||
2d14f397 JH |
2756 | /* Note if the response to EHLO specifies support for the AUTH extension. |
2757 | If it has, check that this host is one we want to authenticate to, and do | |
2758 | the business. The host name and address must be available when the | |
2759 | authenticator's client driver is running. */ | |
0756eb3c | 2760 | |
ee8b8090 | 2761 | switch (yield = smtp_auth(sx)) |
2d14f397 JH |
2762 | { |
2763 | default: goto SEND_QUIT; | |
2764 | case OK: break; | |
2765 | case FAIL_SEND: goto SEND_FAILED; | |
2766 | case FAIL: goto RESPONSE_FAILED; | |
2767 | } | |
0756eb3c PH |
2768 | } |
2769 | } | |
7c576fca | 2770 | sx->pipelining_used = pipelining_active = !!(smtp_peer_options & OPTION_PIPE); |
0756eb3c PH |
2771 | |
2772 | /* The setting up of the SMTP call is now complete. Any subsequent errors are | |
2773 | message-specific. */ | |
2774 | ||
d093f8e5 | 2775 | sx->setting_up = FALSE; |
0756eb3c | 2776 | |
8c5d388a | 2777 | #ifdef SUPPORT_I18N |
d093f8e5 | 2778 | if (sx->addrlist->prop.utf8_msg) |
9094b84b | 2779 | { |
71c15846 JH |
2780 | uschar * s; |
2781 | ||
2782 | /* If the transport sets a downconversion mode it overrides any set by ACL | |
2783 | for the message. */ | |
2784 | ||
ee8b8090 | 2785 | if ((s = ob->utf8_downconvert)) |
71c15846 JH |
2786 | { |
2787 | if (!(s = expand_string(s))) | |
2788 | { | |
2789 | message = string_sprintf("failed to expand utf8_downconvert: %s", | |
2790 | expand_string_message); | |
2791 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
2792 | yield = DEFER; | |
2793 | goto SEND_QUIT; | |
2794 | } | |
2795 | switch (*s) | |
2796 | { | |
2797 | case '1': sx->addrlist->prop.utf8_downcvt = TRUE; | |
2798 | sx->addrlist->prop.utf8_downcvt_maybe = FALSE; | |
2799 | break; | |
2800 | case '0': sx->addrlist->prop.utf8_downcvt = FALSE; | |
2801 | sx->addrlist->prop.utf8_downcvt_maybe = FALSE; | |
2802 | break; | |
2803 | case '-': if (s[1] == '1') | |
2804 | { | |
2805 | sx->addrlist->prop.utf8_downcvt = FALSE; | |
2806 | sx->addrlist->prop.utf8_downcvt_maybe = TRUE; | |
2807 | } | |
2808 | break; | |
2809 | } | |
2810 | } | |
2811 | ||
d093f8e5 JH |
2812 | sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt |
2813 | && !sx->addrlist->prop.utf8_downcvt_maybe; | |
2814 | DEBUG(D_transport) if (!sx->utf8_needed) | |
59a286ef | 2815 | debug_printf("utf8: %s downconvert\n", |
d093f8e5 | 2816 | sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional"); |
9094b84b JH |
2817 | } |
2818 | ||
7ade712c | 2819 | /* If this is an international message we need the host to speak SMTPUTF8 */ |
14de8063 | 2820 | if (sx->utf8_needed && !(sx->peer_offered & OPTION_UTF8)) |
7ade712c JH |
2821 | { |
2822 | errno = ERRNO_UTF8_FWD; | |
2823 | goto RESPONSE_FAILED; | |
2824 | } | |
71c15846 | 2825 | #endif /*SUPPORT_I18N*/ |
7ade712c | 2826 | |
8ac90765 JH |
2827 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) |
2828 | /*XXX should tls_requiretls actually be per-addr? */ | |
2829 | ||
2830 | if ( tls_requiretls & REQUIRETLS_MSG | |
2831 | && !(sx->peer_offered & OPTION_REQUIRETLS) | |
2832 | ) | |
2833 | { | |
2834 | sx->setting_up = TRUE; | |
2835 | errno = ERRNO_REQUIRETLS; | |
2836 | message = US"REQUIRETLS support is required from the server" | |
2837 | " but it was not offered"; | |
2838 | DEBUG(D_transport) debug_printf("%s\n", message); | |
2839 | goto TLS_FAILED; | |
2840 | } | |
2841 | #endif | |
2842 | ||
d093f8e5 JH |
2843 | return OK; |
2844 | ||
2845 | ||
2846 | { | |
2847 | int code; | |
d093f8e5 JH |
2848 | |
2849 | RESPONSE_FAILED: | |
d093f8e5 | 2850 | message = NULL; |
ee8b8090 | 2851 | sx->send_quit = check_response(sx->conn_args.host, &errno, sx->addrlist->more_errno, |
d093f8e5 | 2852 | sx->buffer, &code, &message, &pass_message); |
8ac90765 | 2853 | yield = DEFER; |
d093f8e5 | 2854 | goto FAILED; |
d093f8e5 JH |
2855 | |
2856 | SEND_FAILED: | |
d093f8e5 JH |
2857 | code = '4'; |
2858 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
ee8b8090 | 2859 | sx->conn_args.host->name, sx->conn_args.host->address, strerror(errno)); |
d093f8e5 | 2860 | sx->send_quit = FALSE; |
8ac90765 | 2861 | yield = DEFER; |
d093f8e5 | 2862 | goto FAILED; |
d093f8e5 | 2863 | |
de6273b4 JH |
2864 | EHLOHELO_FAILED: |
2865 | code = '4'; | |
2866 | message = string_sprintf("Remote host closed connection in response to %s" | |
2867 | " (EHLO response was: %s)", smtp_command, sx->buffer); | |
2868 | sx->send_quit = FALSE; | |
8ac90765 | 2869 | yield = DEFER; |
de6273b4 JH |
2870 | goto FAILED; |
2871 | ||
e5ab0ba9 JH |
2872 | /* This label is jumped to directly when a TLS negotiation has failed, |
2873 | or was not done for a host for which it is required. Values will be set | |
2874 | in message and errno, and setting_up will always be true. Treat as | |
2875 | a temporary error. */ | |
2876 | ||
d093f8e5 JH |
2877 | #ifdef SUPPORT_TLS |
2878 | TLS_FAILED: | |
8ac90765 JH |
2879 | # ifdef EXPERIMENTAL_REQUIRETLS |
2880 | if (errno == ERRNO_REQUIRETLS) | |
2881 | code = '5', yield = FAIL; | |
2882 | /*XXX DSN will be labelled 500; prefer 530 5.7.4 */ | |
2883 | else | |
2884 | # endif | |
2885 | code = '4', yield = DEFER; | |
de6273b4 | 2886 | goto FAILED; |
d093f8e5 JH |
2887 | #endif |
2888 | ||
2889 | /* The failure happened while setting up the call; see if the failure was | |
2890 | a 5xx response (this will either be on connection, or following HELO - a 5xx | |
e69636bc JH |
2891 | after EHLO causes it to try HELO). If so, and there are no more hosts to try, |
2892 | fail all addresses, as this host is never going to accept them. For other | |
2893 | errors during setting up (timeouts or whatever), defer all addresses, and | |
2894 | yield DEFER, so that the host is not tried again for a while. | |
2895 | ||
2896 | XXX This peeking for another host feels like a layering violation. We want | |
2897 | to note the host as unusable, but down here we shouldn't know if this was | |
2898 | the last host to try for the addr(list). Perhaps the upper layer should be | |
2899 | the one to do set_errno() ? The problem is that currently the addr is where | |
2900 | errno etc. are stashed, but until we run out of hosts to try the errors are | |
2901 | host-specific. Maybe we should enhance the host_item definition? */ | |
d093f8e5 | 2902 | |
de6273b4 | 2903 | FAILED: |
d093f8e5 | 2904 | sx->ok = FALSE; /* For when reached by GOTO */ |
e69636bc | 2905 | set_errno(sx->addrlist, errno, message, |
ee8b8090 | 2906 | sx->conn_args.host->next |
e69636bc JH |
2907 | ? DEFER |
2908 | : code == '5' | |
d093f8e5 | 2909 | #ifdef SUPPORT_I18N |
e69636bc | 2910 | || errno == ERRNO_UTF8_FWD |
d093f8e5 | 2911 | #endif |
e69636bc | 2912 | ? FAIL : DEFER, |
ee8b8090 | 2913 | pass_message, sx->conn_args.host |
d093f8e5 JH |
2914 | #ifdef EXPERIMENTAL_DSN_INFO |
2915 | , sx->smtp_greeting, sx->helo_response | |
2916 | #endif | |
2917 | ); | |
2918 | } | |
2919 | ||
2920 | ||
2921 | SEND_QUIT: | |
2922 | ||
2923 | if (sx->send_quit) | |
251b9eb4 | 2924 | (void)smtp_write_command(sx, SCMD_FLUSH, "QUIT\r\n"); |
d093f8e5 | 2925 | |
d093f8e5 | 2926 | #ifdef SUPPORT_TLS |
74f1a423 JH |
2927 | if (sx->cctx.tls_ctx) |
2928 | { | |
2929 | tls_close(sx->cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); | |
2930 | sx->cctx.tls_ctx = NULL; | |
2931 | } | |
d093f8e5 JH |
2932 | #endif |
2933 | ||
2934 | /* Close the socket, and return the appropriate value, first setting | |
2935 | works because the NULL setting is passed back to the calling process, and | |
2936 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
b7d3afcf | 2937 | */ |
d093f8e5 | 2938 | |
e1d04f48 | 2939 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
d093f8e5 JH |
2940 | if (sx->send_quit) |
2941 | { | |
74f1a423 JH |
2942 | shutdown(sx->cctx.sock, SHUT_WR); |
2943 | if (fcntl(sx->cctx.sock, F_SETFL, O_NONBLOCK) == 0) | |
2944 | for (rc = 16; read(sx->cctx.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;) | |
d093f8e5 | 2945 | rc--; /* drain socket */ |
02b41d71 | 2946 | sx->send_quit = FALSE; |
d093f8e5 | 2947 | } |
74f1a423 JH |
2948 | (void)close(sx->cctx.sock); |
2949 | sx->cctx.sock = -1; | |
d093f8e5 JH |
2950 | |
2951 | #ifndef DISABLE_EVENT | |
ee8b8090 | 2952 | (void) event_raise(sx->conn_args.tblock->event_action, US"tcp:close", NULL); |
d093f8e5 JH |
2953 | #endif |
2954 | ||
2955 | continue_transport = NULL; | |
2956 | continue_hostname = NULL; | |
2957 | return yield; | |
2958 | } | |
2959 | ||
2960 | ||
9be4572b JH |
2961 | |
2962 | ||
2963 | /* Create the string of options that will be appended to the MAIL FROM: | |
2964 | in the connection context buffer */ | |
2965 | ||
2966 | static int | |
2967 | build_mailcmd_options(smtp_context * sx, address_item * addrlist) | |
2968 | { | |
2969 | uschar * p = sx->buffer; | |
2970 | address_item * addr; | |
2971 | int address_count; | |
2972 | ||
2973 | *p = 0; | |
2974 | ||
14de8063 | 2975 | /* If we know the receiving MTA supports the SIZE qualification, and we know it, |
9be4572b JH |
2976 | send it, adding something to the message size to allow for imprecision |
2977 | and things that get added en route. Exim keeps the number of lines | |
2978 | in a message, so we can give an accurate value for the original message, but we | |
2979 | need some additional to handle added headers. (Double "." characters don't get | |
2980 | included in the count.) */ | |
2981 | ||
14de8063 JH |
2982 | if ( message_size > 0 |
2983 | && sx->peer_offered & OPTION_SIZE && !(sx->avoid_option & OPTION_SIZE)) | |
9be4572b | 2984 | { |
328c5688 JH |
2985 | /*XXX problem here under spool_files_wireformat? |
2986 | Or just forget about lines? Or inflate by a fixed proportion? */ | |
2987 | ||
ee8b8090 | 2988 | sprintf(CS p, " SIZE=%d", message_size+message_linecount+(SOB sx->conn_args.ob)->size_addition); |
9be4572b JH |
2989 | while (*p) p++; |
2990 | } | |
2991 | ||
2992 | #ifndef DISABLE_PRDR | |
aded2255 | 2993 | /* If it supports Per-Recipient Data Responses, and we have more than one recipient, |
9be4572b JH |
2994 | request that */ |
2995 | ||
2996 | sx->prdr_active = FALSE; | |
14de8063 | 2997 | if (sx->peer_offered & OPTION_PRDR) |
9be4572b JH |
2998 | for (addr = addrlist; addr; addr = addr->next) |
2999 | if (addr->transport_return == PENDING_DEFER) | |
3000 | { | |
3001 | for (addr = addr->next; addr; addr = addr->next) | |
3002 | if (addr->transport_return == PENDING_DEFER) | |
3003 | { /* at least two recipients to send */ | |
3004 | sx->prdr_active = TRUE; | |
3005 | sprintf(CS p, " PRDR"); p += 5; | |
3006 | break; | |
3007 | } | |
3008 | break; | |
3009 | } | |
3010 | #endif | |
3011 | ||
3012 | #ifdef SUPPORT_I18N | |
3013 | /* If it supports internationalised messages, and this meesage need that, | |
3014 | request it */ | |
3015 | ||
14de8063 | 3016 | if ( sx->peer_offered & OPTION_UTF8 |
9be4572b JH |
3017 | && addrlist->prop.utf8_msg |
3018 | && !addrlist->prop.utf8_downcvt | |
3019 | ) | |
3020 | Ustrcpy(p, " SMTPUTF8"), p += 9; | |
3021 | #endif | |
3022 | ||
8ac90765 JH |
3023 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) |
3024 | if (tls_requiretls & REQUIRETLS_MSG) | |
3025 | Ustrcpy(p, " REQUIRETLS") , p += 11; | |
3026 | #endif | |
3027 | ||
9be4572b JH |
3028 | /* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */ |
3029 | for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0; | |
3030 | addr && address_count < sx->max_rcpt; | |
3031 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
3032 | { | |
3033 | address_count++; | |
3034 | if (!(addr->dsn_flags & rf_dsnlasthop)) | |
3035 | { | |
3036 | sx->dsn_all_lasthop = FALSE; | |
3037 | break; | |
3038 | } | |
3039 | } | |
3040 | ||
3041 | /* Add any DSN flags to the mail command */ | |
3042 | ||
14de8063 | 3043 | if (sx->peer_offered & OPTION_DSN && !sx->dsn_all_lasthop) |
9be4572b JH |
3044 | { |
3045 | if (dsn_ret == dsn_ret_hdrs) | |
3046 | { Ustrcpy(p, " RET=HDRS"); p += 9; } | |
3047 | else if (dsn_ret == dsn_ret_full) | |
3048 | { Ustrcpy(p, " RET=FULL"); p += 9; } | |
3049 | ||
3050 | if (dsn_envid) | |
3051 | { | |
3052 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid); | |
3053 | while (*p) p++; | |
3054 | } | |
3055 | } | |
3056 | ||
3057 | /* If an authenticated_sender override has been specified for this transport | |
3058 | instance, expand it. If the expansion is forced to fail, and there was already | |
3059 | an authenticated_sender for this message, the original value will be used. | |
3060 | Other expansion failures are serious. An empty result is ignored, but there is | |
3061 | otherwise no check - this feature is expected to be used with LMTP and other | |
3062 | cases where non-standard addresses (e.g. without domains) might be required. */ | |
3063 | ||
ee8b8090 | 3064 | if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->conn_args.ob)) |
9be4572b JH |
3065 | return ERROR; |
3066 | ||
3067 | return OK; | |
3068 | } | |
3069 | ||
3070 | ||
3071 | static void | |
3072 | build_rcptcmd_options(smtp_context * sx, const address_item * addr) | |
3073 | { | |
3074 | uschar * p = sx->buffer; | |
3075 | *p = 0; | |
3076 | ||
3077 | /* Add any DSN flags to the rcpt command */ | |
3078 | ||
14de8063 | 3079 | if (sx->peer_offered & OPTION_DSN && !(addr->dsn_flags & rf_dsnlasthop)) |
9be4572b JH |
3080 | { |
3081 | if (addr->dsn_flags & rf_dsnflags) | |
3082 | { | |
3083 | int i; | |
3084 | BOOL first = TRUE; | |
3085 | ||
3086 | Ustrcpy(p, " NOTIFY="); | |
3087 | while (*p) p++; | |
3088 | for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i]) | |
3089 | { | |
3090 | if (!first) *p++ = ','; | |
3091 | first = FALSE; | |
3092 | Ustrcpy(p, rf_names[i]); | |
3093 | while (*p) p++; | |
3094 | } | |
3095 | } | |
3096 | ||
3097 | if (addr->dsn_orcpt) | |
3098 | { | |
3099 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s", | |
3100 | addr->dsn_orcpt); | |
3101 | while (*p) p++; | |
3102 | } | |
3103 | } | |
3104 | } | |
3105 | ||
3106 | ||
d9c3c8ed JH |
3107 | |
3108 | /* | |
3109 | Return: | |
e9166683 JH |
3110 | 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL) |
3111 | -1 MAIL response error | |
3112 | -2 any non-MAIL read i/o error | |
3113 | -3 non-MAIL response timeout | |
3114 | -4 internal error; channel still usable | |
3115 | -5 transmit failed | |
d9c3c8ed JH |
3116 | */ |
3117 | ||
3118 | int | |
3119 | smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield) | |
3120 | { | |
3121 | address_item * addr; | |
3122 | int address_count; | |
3123 | int rc; | |
3124 | ||
3125 | if (build_mailcmd_options(sx, sx->first_addr) != OK) | |
3126 | { | |
3127 | *yield = ERROR; | |
e9166683 | 3128 | return -4; |
d9c3c8ed JH |
3129 | } |
3130 | ||
3131 | /* From here until we send the DATA command, we can make use of PIPELINING | |
3132 | if the server host supports it. The code has to be able to check the responses | |
3133 | at any point, for when the buffer fills up, so we write it totally generally. | |
3134 | When PIPELINING is off, each command written reports that it has flushed the | |
3135 | buffer. */ | |
3136 | ||
3137 | sx->pending_MAIL = TRUE; /* The block starts with MAIL */ | |
3138 | ||
3139 | { | |
3140 | uschar * s = sx->from_addr; | |
3141 | #ifdef SUPPORT_I18N | |
3142 | uschar * errstr = NULL; | |
3143 | ||
3144 | /* If we must downconvert, do the from-address here. Remember we had to | |
3145 | for the to-addresses (done below), and also (ugly) for re-doing when building | |
3146 | the delivery log line. */ | |
3147 | ||
3148 | if ( sx->addrlist->prop.utf8_msg | |
14de8063 | 3149 | && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & OPTION_UTF8)) |
d9c3c8ed JH |
3150 | ) |
3151 | { | |
3152 | if (s = string_address_utf8_to_alabel(s, &errstr), errstr) | |
3153 | { | |
3154 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE); | |
3155 | *yield = ERROR; | |
e9166683 | 3156 | return -4; |
d9c3c8ed JH |
3157 | } |
3158 | setflag(sx->addrlist, af_utf8_downcvt); | |
3159 | } | |
3160 | #endif | |
3161 | ||
251b9eb4 | 3162 | rc = smtp_write_command(sx, pipelining_active ? SCMD_BUFFER : SCMD_FLUSH, |
d9c3c8ed JH |
3163 | "MAIL FROM:<%s>%s\r\n", s, sx->buffer); |
3164 | } | |
3165 | ||
3166 | mail_command = string_copy(big_buffer); /* Save for later error message */ | |
3167 | ||
3168 | switch(rc) | |
3169 | { | |
3170 | case -1: /* Transmission error */ | |
e9166683 | 3171 | return -5; |
d9c3c8ed | 3172 | |
df5b41e3 | 3173 | case +1: /* Cmd was sent */ |
251b9eb4 | 3174 | if (!smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', |
ee8b8090 | 3175 | (SOB sx->conn_args.ob)->command_timeout)) |
d9c3c8ed JH |
3176 | { |
3177 | if (errno == 0 && sx->buffer[0] == '4') | |
3178 | { | |
3179 | errno = ERRNO_MAIL4XX; | |
3180 | sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
3181 | } | |
3182 | return -1; | |
3183 | } | |
3184 | sx->pending_MAIL = FALSE; | |
3185 | break; | |
e9166683 JH |
3186 | |
3187 | /* otherwise zero: command queued for pipeline */ | |
d9c3c8ed JH |
3188 | } |
3189 | ||
3190 | /* Pass over all the relevant recipient addresses for this host, which are the | |
3191 | ones that have status PENDING_DEFER. If we are using PIPELINING, we can send | |
3192 | several before we have to read the responses for those seen so far. This | |
3193 | checking is done by a subroutine because it also needs to be done at the end. | |
3194 | Send only up to max_rcpt addresses at a time, leaving next_addr pointing to | |
3195 | the next one if not all are sent. | |
3196 | ||
3197 | In the MUA wrapper situation, we want to flush the PIPELINING buffer for the | |
3198 | last address because we want to abort if any recipients have any kind of | |
3199 | problem, temporary or permanent. We know that all recipient addresses will have | |
3200 | the PENDING_DEFER status, because only one attempt is ever made, and we know | |
e9166683 JH |
3201 | that max_rcpt will be large, so all addresses will be done at once. |
3202 | ||
3203 | For verify we flush the pipeline after any (the only) rcpt address. */ | |
d9c3c8ed JH |
3204 | |
3205 | for (addr = sx->first_addr, address_count = 0; | |
3206 | addr && address_count < sx->max_rcpt; | |
3207 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
3208 | { | |
3209 | int count; | |
3210 | BOOL no_flush; | |
3211 | uschar * rcpt_addr; | |
3212 | ||
14de8063 | 3213 | addr->dsn_aware = sx->peer_offered & OPTION_DSN |
d9c3c8ed JH |
3214 | ? dsn_support_yes : dsn_support_no; |
3215 | ||
3216 | address_count++; | |
4c2471ca JH |
3217 | no_flush = pipelining_active && !sx->verify |
3218 | && (!mua_wrapper || addr->next && address_count < sx->max_rcpt); | |
d9c3c8ed JH |
3219 | |
3220 | build_rcptcmd_options(sx, addr); | |
3221 | ||
3222 | /* Now send the RCPT command, and process outstanding responses when | |
3223 | necessary. After a timeout on RCPT, we just end the function, leaving the | |
3224 | yield as OK, because this error can often mean that there is a problem with | |
3225 | just one address, so we don't want to delay the host. */ | |
3226 | ||
ee8b8090 | 3227 | rcpt_addr = transport_rcpt_address(addr, sx->conn_args.tblock->rcpt_include_affixes); |
d9c3c8ed JH |
3228 | |
3229 | #ifdef SUPPORT_I18N | |
3230 | if ( testflag(sx->addrlist, af_utf8_downcvt) | |
3231 | && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL)) | |
3232 | ) | |
3233 | { | |
3234 | /*XXX could we use a per-address errstr here? Not fail the whole send? */ | |
3235 | errno = ERRNO_EXPANDFAIL; | |
e9166683 | 3236 | return -5; /*XXX too harsh? */ |
d9c3c8ed JH |
3237 | } |
3238 | #endif | |
3239 | ||
251b9eb4 | 3240 | count = smtp_write_command(sx, no_flush ? SCMD_BUFFER : SCMD_FLUSH, |
4e910c01 | 3241 | "RCPT TO:<%s>%s%s\r\n", rcpt_addr, sx->igquotstr, sx->buffer); |
d9c3c8ed | 3242 | |
e9166683 | 3243 | if (count < 0) return -5; |
d9c3c8ed JH |
3244 | if (count > 0) |
3245 | { | |
df5b41e3 | 3246 | switch(sync_responses(sx, count, 0)) |
d9c3c8ed JH |
3247 | { |
3248 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ | |
3249 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e9166683 | 3250 | break; |
d9c3c8ed JH |
3251 | |
3252 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ | |
3253 | if (!sx->lmtp) /* can't tell about progress yet */ | |
3254 | sx->completed_addr = TRUE; | |
3255 | case 0: /* No 2xx or 5xx, but no probs */ | |
3256 | break; | |
3257 | ||
e9166683 JH |
3258 | case -1: return -3; /* Timeout on RCPT */ |
3259 | case -2: return -2; /* non-MAIL read i/o error */ | |
3260 | default: return -1; /* any MAIL error */ | |
ee8b8090 JH |
3261 | |
3262 | #ifdef EXPERIMENTAL_PIPE_CONNECT | |
3263 | case -4: return -1; /* non-2xx for pipelined banner or EHLO */ | |
3264 | #endif | |
d9c3c8ed JH |
3265 | } |
3266 | sx->pending_MAIL = FALSE; /* Dealt with MAIL */ | |
3267 | } | |
3268 | } /* Loop for next address */ | |
3269 | ||
3270 | sx->next_addr = addr; | |
3271 | return 0; | |
3272 | } | |
3273 | ||
3274 | ||
875512a3 JH |
3275 | #ifdef SUPPORT_TLS |
3276 | /***************************************************** | |
3277 | * Proxy TLS connection for another transport process * | |
3278 | ******************************************************/ | |
3279 | /* | |
d097cc73 JH |
3280 | Close the unused end of the pipe, fork once more, then use the given buffer |
3281 | as a staging area, and select on both the given fd and the TLS'd client-fd for | |
3282 | data to read (per the coding in ip_recv() and fd_ready() this is legitimate). | |
3283 | Do blocking full-size writes, and reads under a timeout. Once both input | |
3284 | channels are closed, exit the process. | |
875512a3 JH |
3285 | |
3286 | Arguments: | |
74f1a423 | 3287 | ct_ctx tls context |
57cc2785 JH |
3288 | buf space to use for buffering |
3289 | bufsiz size of buffer | |
d097cc73 | 3290 | pfd pipe filedescriptor array; [0] is comms to proxied process |
875512a3 JH |
3291 | timeout per-read timeout, seconds |
3292 | */ | |
3293 | ||
57cc2785 | 3294 | void |
74f1a423 JH |
3295 | smtp_proxy_tls(void * ct_ctx, uschar * buf, size_t bsize, int * pfd, |
3296 | int timeout) | |
875512a3 | 3297 | { |
e47252f5 | 3298 | fd_set rfds, efds; |
74f1a423 | 3299 | int max_fd = MAX(pfd[0], tls_out.active.sock) + 1; |
875512a3 JH |
3300 | int rc, i, fd_bits, nbytes; |
3301 | ||
d097cc73 JH |
3302 | close(pfd[1]); |
3303 | if ((rc = fork())) | |
3304 | { | |
3305 | DEBUG(D_transport) debug_printf("proxy-proc final-pid %d\n", rc); | |