Commit | Line | Data |
---|---|---|
0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
d4e5e70b | 5 | /* Copyright (c) University of Cambridge 1995 - 2017 */ |
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) }, | |
27 | { "authenticated_sender", opt_stringptr, | |
28 | (void *)offsetof(smtp_transport_options_block, authenticated_sender) }, | |
382afc6b PH |
29 | { "authenticated_sender_force", opt_bool, |
30 | (void *)offsetof(smtp_transport_options_block, authenticated_sender_force) }, | |
0756eb3c PH |
31 | { "command_timeout", opt_time, |
32 | (void *)offsetof(smtp_transport_options_block, command_timeout) }, | |
33 | { "connect_timeout", opt_time, | |
34 | (void *)offsetof(smtp_transport_options_block, connect_timeout) }, | |
35 | { "connection_max_messages", opt_int | opt_public, | |
36 | (void *)offsetof(transport_instance, connection_max_messages) }, | |
37 | { "data_timeout", opt_time, | |
38 | (void *)offsetof(smtp_transport_options_block, data_timeout) }, | |
39 | { "delay_after_cutoff", opt_bool, | |
40 | (void *)offsetof(smtp_transport_options_block, delay_after_cutoff) }, | |
80a47a2c | 41 | #ifndef DISABLE_DKIM |
f7572e5a | 42 | { "dkim_canon", opt_stringptr, |
ff5aac2b | 43 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_canon) }, |
f7572e5a | 44 | { "dkim_domain", opt_stringptr, |
ff5aac2b | 45 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_domain) }, |
d73e45df JH |
46 | { "dkim_hash", opt_stringptr, |
47 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_hash) }, | |
7c6ec81b JH |
48 | { "dkim_identity", opt_stringptr, |
49 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_identity) }, | |
f7572e5a | 50 | { "dkim_private_key", opt_stringptr, |
ff5aac2b | 51 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_private_key) }, |
f7572e5a | 52 | { "dkim_selector", opt_stringptr, |
ff5aac2b | 53 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_selector) }, |
f7572e5a | 54 | { "dkim_sign_headers", opt_stringptr, |
ff5aac2b | 55 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_sign_headers) }, |
f7572e5a | 56 | { "dkim_strict", opt_stringptr, |
ff5aac2b | 57 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_strict) }, |
80a47a2c | 58 | #endif |
0756eb3c PH |
59 | { "dns_qualify_single", opt_bool, |
60 | (void *)offsetof(smtp_transport_options_block, dns_qualify_single) }, | |
61 | { "dns_search_parents", opt_bool, | |
62 | (void *)offsetof(smtp_transport_options_block, dns_search_parents) }, | |
578897ea | 63 | { "dnssec_request_domains", opt_stringptr, |
7cd171b7 | 64 | (void *)offsetof(smtp_transport_options_block, dnssec.request) }, |
578897ea | 65 | { "dnssec_require_domains", opt_stringptr, |
7cd171b7 | 66 | (void *)offsetof(smtp_transport_options_block, dnssec.require) }, |
9e4f5962 PP |
67 | { "dscp", opt_stringptr, |
68 | (void *)offsetof(smtp_transport_options_block, dscp) }, | |
0756eb3c PH |
69 | { "fallback_hosts", opt_stringptr, |
70 | (void *)offsetof(smtp_transport_options_block, fallback_hosts) }, | |
71 | { "final_timeout", opt_time, | |
72 | (void *)offsetof(smtp_transport_options_block, final_timeout) }, | |
73 | { "gethostbyname", opt_bool, | |
74 | (void *)offsetof(smtp_transport_options_block, gethostbyname) }, | |
75 | { "helo_data", opt_stringptr, | |
76 | (void *)offsetof(smtp_transport_options_block, helo_data) }, | |
77 | { "hosts", opt_stringptr, | |
78 | (void *)offsetof(smtp_transport_options_block, hosts) }, | |
79 | { "hosts_avoid_esmtp", opt_stringptr, | |
80 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_esmtp) }, | |
c51b8e75 PH |
81 | { "hosts_avoid_pipelining", opt_stringptr, |
82 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_pipelining) }, | |
80a47a2c | 83 | #ifdef SUPPORT_TLS |
0756eb3c PH |
84 | { "hosts_avoid_tls", opt_stringptr, |
85 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_tls) }, | |
80a47a2c | 86 | #endif |
0756eb3c PH |
87 | { "hosts_max_try", opt_int, |
88 | (void *)offsetof(smtp_transport_options_block, hosts_max_try) }, | |
533244af PH |
89 | { "hosts_max_try_hardlimit", opt_int, |
90 | (void *)offsetof(smtp_transport_options_block, hosts_max_try_hardlimit) }, | |
80a47a2c | 91 | #ifdef SUPPORT_TLS |
0756eb3c PH |
92 | { "hosts_nopass_tls", opt_stringptr, |
93 | (void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) }, | |
875512a3 JH |
94 | { "hosts_noproxy_tls", opt_stringptr, |
95 | (void *)offsetof(smtp_transport_options_block, hosts_noproxy_tls) }, | |
80a47a2c | 96 | #endif |
0756eb3c PH |
97 | { "hosts_override", opt_bool, |
98 | (void *)offsetof(smtp_transport_options_block, hosts_override) }, | |
99 | { "hosts_randomize", opt_bool, | |
100 | (void *)offsetof(smtp_transport_options_block, hosts_randomize) }, | |
f2de3a33 | 101 | #if defined(SUPPORT_TLS) && !defined(DISABLE_OCSP) |
44662487 JH |
102 | { "hosts_request_ocsp", opt_stringptr, |
103 | (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) }, | |
104 | #endif | |
0756eb3c PH |
105 | { "hosts_require_auth", opt_stringptr, |
106 | (void *)offsetof(smtp_transport_options_block, hosts_require_auth) }, | |
80a47a2c | 107 | #ifdef SUPPORT_TLS |
7a31d643 JH |
108 | # ifdef EXPERIMENTAL_DANE |
109 | { "hosts_require_dane", opt_stringptr, | |
110 | (void *)offsetof(smtp_transport_options_block, hosts_require_dane) }, | |
111 | # endif | |
f2de3a33 | 112 | # ifndef DISABLE_OCSP |
f5d78688 JH |
113 | { "hosts_require_ocsp", opt_stringptr, |
114 | (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) }, | |
115 | # endif | |
0756eb3c PH |
116 | { "hosts_require_tls", opt_stringptr, |
117 | (void *)offsetof(smtp_transport_options_block, hosts_require_tls) }, | |
80a47a2c | 118 | #endif |
0756eb3c PH |
119 | { "hosts_try_auth", opt_stringptr, |
120 | (void *)offsetof(smtp_transport_options_block, hosts_try_auth) }, | |
f98442df JH |
121 | { "hosts_try_chunking", opt_stringptr, |
122 | (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) }, | |
7a31d643 | 123 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
96e47838 TL |
124 | { "hosts_try_dane", opt_stringptr, |
125 | (void *)offsetof(smtp_transport_options_block, hosts_try_dane) }, | |
126 | #endif | |
fb05276a JH |
127 | { "hosts_try_fastopen", opt_stringptr, |
128 | (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) }, | |
8ccd00b1 | 129 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
130 | { "hosts_try_prdr", opt_stringptr, |
131 | (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) }, | |
132 | #endif | |
99400968 JH |
133 | #ifdef SUPPORT_TLS |
134 | { "hosts_verify_avoid_tls", opt_stringptr, | |
135 | (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) }, | |
136 | #endif | |
0756eb3c PH |
137 | { "interface", opt_stringptr, |
138 | (void *)offsetof(smtp_transport_options_block, interface) }, | |
139 | { "keepalive", opt_bool, | |
140 | (void *)offsetof(smtp_transport_options_block, keepalive) }, | |
f1513293 PH |
141 | { "lmtp_ignore_quota", opt_bool, |
142 | (void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) }, | |
0756eb3c PH |
143 | { "max_rcpt", opt_int | opt_public, |
144 | (void *)offsetof(transport_instance, max_addresses) }, | |
506900af | 145 | { "multi_domain", opt_expand_bool | opt_public, |
0756eb3c PH |
146 | (void *)offsetof(transport_instance, multi_domain) }, |
147 | { "port", opt_stringptr, | |
148 | (void *)offsetof(smtp_transport_options_block, port) }, | |
149 | { "protocol", opt_stringptr, | |
150 | (void *)offsetof(smtp_transport_options_block, protocol) }, | |
9c695f6d | 151 | { "retry_include_ip_address", opt_expand_bool, |
0756eb3c PH |
152 | (void *)offsetof(smtp_transport_options_block, retry_include_ip_address) }, |
153 | { "serialize_hosts", opt_stringptr, | |
154 | (void *)offsetof(smtp_transport_options_block, serialize_hosts) }, | |
155 | { "size_addition", opt_int, | |
156 | (void *)offsetof(smtp_transport_options_block, size_addition) } | |
f0989ec0 | 157 | #ifdef SUPPORT_SOCKS |
7eb6c37c JH |
158 | ,{ "socks_proxy", opt_stringptr, |
159 | (void *)offsetof(smtp_transport_options_block, socks_proxy) } | |
160 | #endif | |
80a47a2c | 161 | #ifdef SUPPORT_TLS |
0756eb3c PH |
162 | ,{ "tls_certificate", opt_stringptr, |
163 | (void *)offsetof(smtp_transport_options_block, tls_certificate) }, | |
164 | { "tls_crl", opt_stringptr, | |
165 | (void *)offsetof(smtp_transport_options_block, tls_crl) }, | |
54c90be1 PP |
166 | { "tls_dh_min_bits", opt_int, |
167 | (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) }, | |
0756eb3c PH |
168 | { "tls_privatekey", opt_stringptr, |
169 | (void *)offsetof(smtp_transport_options_block, tls_privatekey) }, | |
3f0945ff | 170 | { "tls_require_ciphers", opt_stringptr, |
0756eb3c | 171 | (void *)offsetof(smtp_transport_options_block, tls_require_ciphers) }, |
3f0945ff PP |
172 | { "tls_sni", opt_stringptr, |
173 | (void *)offsetof(smtp_transport_options_block, tls_sni) }, | |
0756eb3c PH |
174 | { "tls_tempfail_tryclear", opt_bool, |
175 | (void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) }, | |
a63be306 WB |
176 | { "tls_try_verify_hosts", opt_stringptr, |
177 | (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) }, | |
e51c7be2 JH |
178 | { "tls_verify_cert_hostnames", opt_stringptr, |
179 | (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)}, | |
0756eb3c | 180 | { "tls_verify_certificates", opt_stringptr, |
a63be306 WB |
181 | (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) }, |
182 | { "tls_verify_hosts", opt_stringptr, | |
183 | (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) } | |
80a47a2c | 184 | #endif |
0756eb3c PH |
185 | }; |
186 | ||
187 | /* Size of the options list. An extern variable has to be used so that its | |
188 | address can appear in the tables drtables.c. */ | |
189 | ||
190 | int smtp_transport_options_count = | |
191 | sizeof(smtp_transport_options)/sizeof(optionlist); | |
192 | ||
d185889f JH |
193 | |
194 | #ifdef MACRO_PREDEF | |
195 | ||
196 | /* Dummy values */ | |
197 | smtp_transport_options_block smtp_transport_option_defaults = {0}; | |
198 | void smtp_transport_init(transport_instance *tblock) {} | |
199 | BOOL smtp_transport_entry(transport_instance *tblock, address_item *addr) {return FALSE;} | |
200 | void smtp_transport_closedown(transport_instance *tblock) {} | |
201 | ||
202 | #else /*!MACRO_PREDEF*/ | |
203 | ||
204 | ||
0756eb3c PH |
205 | /* Default private options block for the smtp transport. */ |
206 | ||
207 | smtp_transport_options_block smtp_transport_option_defaults = { | |
838d897c | 208 | .hosts = NULL, |
847cd15f | 209 | .fallback_hosts = NULL, |
838d897c JH |
210 | .hostlist = NULL, |
211 | .fallback_hostlist = NULL, | |
212 | .authenticated_sender = NULL, | |
213 | .helo_data = US"$primary_hostname", | |
214 | .interface = NULL, | |
215 | .port = NULL, | |
216 | .protocol = US"smtp", | |
217 | .dscp = NULL, | |
218 | .serialize_hosts = NULL, | |
219 | .hosts_try_auth = NULL, | |
220 | .hosts_require_auth = NULL, | |
221 | .hosts_try_chunking = US"*", | |
96e47838 | 222 | #ifdef EXPERIMENTAL_DANE |
838d897c JH |
223 | .hosts_try_dane = NULL, |
224 | .hosts_require_dane = NULL, | |
96e47838 | 225 | #endif |
838d897c | 226 | .hosts_try_fastopen = NULL, |
8ccd00b1 | 227 | #ifndef DISABLE_PRDR |
838d897c | 228 | .hosts_try_prdr = US"*", |
f5d78688 | 229 | #endif |
f2de3a33 | 230 | #ifndef DISABLE_OCSP |
838d897c JH |
231 | .hosts_request_ocsp = US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */ |
232 | .hosts_require_ocsp = NULL, | |
fd98a5c6 | 233 | #endif |
838d897c JH |
234 | .hosts_require_tls = NULL, |
235 | .hosts_avoid_tls = NULL, | |
236 | .hosts_verify_avoid_tls = NULL, | |
237 | .hosts_avoid_pipelining = NULL, | |
238 | .hosts_avoid_esmtp = NULL, | |
57cc2785 | 239 | #ifdef SUPPORT_TLS |
838d897c JH |
240 | .hosts_nopass_tls = NULL, |
241 | .hosts_noproxy_tls = US"*", | |
57cc2785 | 242 | #endif |
838d897c JH |
243 | .command_timeout = 5*60, |
244 | .connect_timeout = 5*60, | |
245 | .data_timeout = 5*60, | |
246 | .final_timeout = 10*60, | |
247 | .size_addition = 1024, | |
248 | .hosts_max_try = 5, | |
249 | .hosts_max_try_hardlimit = 50, | |
250 | .address_retry_include_sender = TRUE, | |
251 | .allow_localhost = FALSE, | |
252 | .authenticated_sender_force = FALSE, | |
253 | .gethostbyname = FALSE, | |
254 | .dns_qualify_single = TRUE, | |
255 | .dns_search_parents = FALSE, | |
256 | .dnssec = { .request=NULL, .require=NULL }, | |
257 | .delay_after_cutoff = TRUE, | |
258 | .hosts_override = FALSE, | |
259 | .hosts_randomize = FALSE, | |
260 | .keepalive = TRUE, | |
261 | .lmtp_ignore_quota = FALSE, | |
262 | .expand_retry_include_ip_address = NULL, | |
263 | .retry_include_ip_address = TRUE, | |
f0989ec0 | 264 | #ifdef SUPPORT_SOCKS |
838d897c | 265 | .socks_proxy = NULL, |
b8bf753b | 266 | #endif |
80a47a2c | 267 | #ifdef SUPPORT_TLS |
838d897c JH |
268 | .tls_certificate = NULL, |
269 | .tls_crl = NULL, | |
270 | .tls_privatekey = NULL, | |
271 | .tls_require_ciphers = NULL, | |
272 | .tls_sni = NULL, | |
273 | .tls_verify_certificates = US"system", | |
274 | .tls_dh_min_bits = EXIM_CLIENT_DH_DEFAULT_MIN_BITS, | |
275 | .tls_tempfail_tryclear = TRUE, | |
276 | .tls_verify_hosts = NULL, | |
277 | .tls_try_verify_hosts = US"*", | |
278 | .tls_verify_cert_hostnames = US"*", | |
80a47a2c TK |
279 | #endif |
280 | #ifndef DISABLE_DKIM | |
838d897c JH |
281 | .dkim = |
282 | {.dkim_domain = NULL, | |
7c6ec81b | 283 | .dkim_identity = NULL, |
838d897c JH |
284 | .dkim_private_key = NULL, |
285 | .dkim_selector = NULL, | |
286 | .dkim_canon = NULL, | |
7c6ec81b | 287 | .dkim_sign_headers = NULL, |
838d897c | 288 | .dkim_strict = NULL, |
d73e45df | 289 | .dkim_hash = US"sha256", |
838d897c | 290 | .dot_stuffed = FALSE}, |
80a47a2c | 291 | #endif |
0756eb3c PH |
292 | }; |
293 | ||
6c1c3d1d WB |
294 | /* some DSN flags for use later */ |
295 | ||
296 | static int rf_list[] = {rf_notify_never, rf_notify_success, | |
297 | rf_notify_failure, rf_notify_delay }; | |
298 | ||
45500060 | 299 | static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" }; |
6c1c3d1d WB |
300 | |
301 | ||
0756eb3c PH |
302 | |
303 | /* Local statics */ | |
304 | ||
87cb4a16 JH |
305 | static uschar *smtp_command; /* Points to last cmd for error messages */ |
306 | static uschar *mail_command; /* Points to MAIL cmd for error messages */ | |
307 | static uschar *data_command = US""; /* Points to DATA cmd for error messages */ | |
308 | static BOOL update_waiting; /* TRUE to update the "wait" database */ | |
875512a3 JH |
309 | |
310 | /*XXX move to smtp_context */ | |
87cb4a16 | 311 | static BOOL pipelining_active; /* current transaction is in pipe mode */ |
0756eb3c PH |
312 | |
313 | ||
314 | /************************************************* | |
315 | * Setup entry point * | |
316 | *************************************************/ | |
317 | ||
318 | /* This function is called when the transport is about to be used, | |
319 | but before running it in a sub-process. It is used for two things: | |
320 | ||
321 | (1) To set the fallback host list in addresses, when delivering. | |
26da7e20 PH |
322 | (2) To pass back the interface, port, protocol, and other options, for use |
323 | during callout verification. | |
0756eb3c PH |
324 | |
325 | Arguments: | |
326 | tblock pointer to the transport instance block | |
327 | addrlist list of addresses about to be transported | |
328 | tf if not NULL, pointer to block in which to return options | |
929ba01c PH |
329 | uid the uid that will be set (not used) |
330 | gid the gid that will be set (not used) | |
0756eb3c PH |
331 | errmsg place for error message (not used) |
332 | ||
333 | Returns: OK always (FAIL, DEFER not used) | |
334 | */ | |
335 | ||
336 | static int | |
337 | smtp_transport_setup(transport_instance *tblock, address_item *addrlist, | |
929ba01c | 338 | transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg) |
0756eb3c PH |
339 | { |
340 | smtp_transport_options_block *ob = | |
341 | (smtp_transport_options_block *)(tblock->options_block); | |
342 | ||
343 | errmsg = errmsg; /* Keep picky compilers happy */ | |
929ba01c PH |
344 | uid = uid; |
345 | gid = gid; | |
0756eb3c PH |
346 | |
347 | /* Pass back options if required. This interface is getting very messy. */ | |
348 | ||
02b41d71 | 349 | if (tf) |
0756eb3c PH |
350 | { |
351 | tf->interface = ob->interface; | |
352 | tf->port = ob->port; | |
353 | tf->protocol = ob->protocol; | |
354 | tf->hosts = ob->hosts; | |
355 | tf->hosts_override = ob->hosts_override; | |
356 | tf->hosts_randomize = ob->hosts_randomize; | |
357 | tf->gethostbyname = ob->gethostbyname; | |
358 | tf->qualify_single = ob->dns_qualify_single; | |
359 | tf->search_parents = ob->dns_search_parents; | |
26da7e20 | 360 | tf->helo_data = ob->helo_data; |
0756eb3c PH |
361 | } |
362 | ||
363 | /* Set the fallback host list for all the addresses that don't have fallback | |
364 | host lists, provided that the local host wasn't present in the original host | |
365 | list. */ | |
366 | ||
367 | if (!testflag(addrlist, af_local_host_removed)) | |
02b41d71 JH |
368 | for (; addrlist; addrlist = addrlist->next) |
369 | if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist; | |
0756eb3c PH |
370 | |
371 | return OK; | |
372 | } | |
373 | ||
374 | ||
375 | ||
376 | /************************************************* | |
377 | * Initialization entry point * | |
378 | *************************************************/ | |
379 | ||
380 | /* Called for each instance, after its options have been read, to | |
381 | enable consistency checks to be done, or anything else that needs | |
382 | to be set up. | |
383 | ||
384 | Argument: pointer to the transport instance block | |
385 | Returns: nothing | |
386 | */ | |
387 | ||
388 | void | |
389 | smtp_transport_init(transport_instance *tblock) | |
390 | { | |
391 | smtp_transport_options_block *ob = | |
392 | (smtp_transport_options_block *)(tblock->options_block); | |
393 | ||
394 | /* Retry_use_local_part defaults FALSE if unset */ | |
395 | ||
396 | if (tblock->retry_use_local_part == TRUE_UNSET) | |
397 | tblock->retry_use_local_part = FALSE; | |
398 | ||
399 | /* Set the default port according to the protocol */ | |
400 | ||
401 | if (ob->port == NULL) | |
061b7ebd PP |
402 | ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" : |
403 | (strcmpic(ob->protocol, US"smtps") == 0)? US"smtps" : US"smtp"; | |
0756eb3c PH |
404 | |
405 | /* Set up the setup entry point, to be called before subprocesses for this | |
406 | transport. */ | |
407 | ||
408 | tblock->setup = smtp_transport_setup; | |
409 | ||
410 | /* Complain if any of the timeouts are zero. */ | |
411 | ||
412 | if (ob->command_timeout <= 0 || ob->data_timeout <= 0 || | |
413 | ob->final_timeout <= 0) | |
414 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
415 | "command, data, or final timeout value is zero for %s transport", | |
416 | tblock->name); | |
417 | ||
418 | /* If hosts_override is set and there are local hosts, set the global | |
419 | flag that stops verify from showing router hosts. */ | |
420 | ||
421 | if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE; | |
422 | ||
423 | /* If there are any fallback hosts listed, build a chain of host items | |
424 | for them, but do not do any lookups at this time. */ | |
425 | ||
426 | host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE); | |
427 | } | |
428 | ||
429 | ||
430 | ||
431 | ||
432 | ||
433 | /************************************************* | |
434 | * Set delivery info into all active addresses * | |
435 | *************************************************/ | |
436 | ||
437 | /* Only addresses whose status is >= PENDING are relevant. A lesser | |
438 | status means that an address is not currently being processed. | |
439 | ||
440 | Arguments: | |
447d236c PH |
441 | addrlist points to a chain of addresses |
442 | errno_value to put in each address's errno field | |
443 | msg to put in each address's message field | |
444 | rc to put in each address's transport_return field | |
445 | pass_message if TRUE, set the "pass message" flag in the address | |
c562fd30 | 446 | host if set, mark addrs as having used this host |
895fbaf2 JH |
447 | smtp_greeting from peer |
448 | helo_response from peer | |
0756eb3c PH |
449 | |
450 | If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in | |
451 | the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate | |
452 | this particular type of timeout. | |
453 | ||
454 | Returns: nothing | |
455 | */ | |
456 | ||
7cd1141b PH |
457 | static void |
458 | set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
895fbaf2 JH |
459 | BOOL pass_message, host_item * host |
460 | #ifdef EXPERIMENTAL_DSN_INFO | |
461 | , const uschar * smtp_greeting, const uschar * helo_response | |
462 | #endif | |
463 | ) | |
0756eb3c PH |
464 | { |
465 | address_item *addr; | |
466 | int orvalue = 0; | |
467 | if (errno_value == ERRNO_CONNECTTIMEOUT) | |
468 | { | |
469 | errno_value = ETIMEDOUT; | |
470 | orvalue = RTEF_CTOUT; | |
471 | } | |
895fbaf2 | 472 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b | 473 | if (addr->transport_return >= PENDING) |
447d236c | 474 | { |
168dec3b JH |
475 | addr->basic_errno = errno_value; |
476 | addr->more_errno |= orvalue; | |
02b41d71 | 477 | if (msg) |
168dec3b JH |
478 | { |
479 | addr->message = msg; | |
480 | if (pass_message) setflag(addr, af_pass_message); | |
481 | } | |
482 | addr->transport_return = rc; | |
483 | if (host) | |
895fbaf2 | 484 | { |
168dec3b | 485 | addr->host_used = host; |
895fbaf2 JH |
486 | #ifdef EXPERIMENTAL_DSN_INFO |
487 | if (smtp_greeting) | |
488 | {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';} | |
489 | addr->smtp_greeting = smtp_greeting; | |
490 | ||
491 | if (helo_response) | |
492 | {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';} | |
493 | addr->helo_response = helo_response; | |
494 | #endif | |
495 | } | |
447d236c | 496 | } |
0756eb3c PH |
497 | } |
498 | ||
895fbaf2 JH |
499 | static void |
500 | set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
501 | BOOL pass_message) | |
502 | { | |
503 | set_errno(addrlist, errno_value, msg, rc, pass_message, NULL | |
504 | #ifdef EXPERIMENTAL_DSN_INFO | |
505 | , NULL, NULL | |
506 | #endif | |
507 | ); | |
508 | } | |
0756eb3c PH |
509 | |
510 | ||
511 | /************************************************* | |
512 | * Check an SMTP response * | |
513 | *************************************************/ | |
514 | ||
515 | /* This function is given an errno code and the SMTP response buffer | |
516 | to analyse, together with the host identification for generating messages. It | |
517 | sets an appropriate message and puts the first digit of the response code into | |
518 | the yield variable. If no response was actually read, a suitable digit is | |
519 | chosen. | |
520 | ||
521 | Arguments: | |
447d236c PH |
522 | host the current host, to get its name for messages |
523 | errno_value pointer to the errno value | |
524 | more_errno from the top address for use with ERRNO_FILTER_FAIL | |
525 | buffer the SMTP response buffer | |
526 | yield where to put a one-digit SMTP response code | |
4c04137d | 527 | message where to put an error message |
447d236c PH |
528 | pass_message set TRUE if message is an SMTP response |
529 | ||
530 | Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE | |
0756eb3c PH |
531 | */ |
532 | ||
a7538db1 JH |
533 | static BOOL |
534 | check_response(host_item *host, int *errno_value, int more_errno, | |
447d236c | 535 | uschar *buffer, int *yield, uschar **message, BOOL *pass_message) |
0756eb3c | 536 | { |
0d9fa8c0 | 537 | uschar * pl = pipelining_active ? US"pipelined " : US""; |
e9166683 | 538 | const uschar * s; |
0756eb3c PH |
539 | |
540 | *yield = '4'; /* Default setting is to give a temporary error */ | |
541 | ||
e9166683 | 542 | switch(*errno_value) |
0756eb3c | 543 | { |
e9166683 JH |
544 | case ETIMEDOUT: /* Handle response timeout */ |
545 | *message = US string_sprintf("SMTP timeout after %s%s", | |
546 | pl, smtp_command); | |
547 | if (transport_count > 0) | |
548 | *message = US string_sprintf("%s (%d bytes written)", *message, | |
549 | transport_count); | |
550 | return FALSE; | |
551 | ||
552 | case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */ | |
553 | s = string_printing(buffer); | |
554 | while (isspace(*s)) s++; | |
555 | *message = *s == 0 | |
556 | ? string_sprintf("Malformed SMTP reply (an empty line) " | |
557 | "in response to %s%s", pl, smtp_command) | |
558 | : string_sprintf("Malformed SMTP reply in response to %s%s: %s", | |
559 | pl, smtp_command, s); | |
560 | return FALSE; | |
561 | ||
562 | case ERRNO_FILTER_FAIL: /* Handle a failed filter process error; | |
563 | can't send QUIT as we mustn't end the DATA. */ | |
564 | *message = string_sprintf("transport filter process failed (%d)%s", | |
565 | more_errno, | |
566 | more_errno == EX_EXECFAILED ? ": unable to execute command" : ""); | |
567 | return FALSE; | |
568 | ||
569 | case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion; | |
570 | can't send QUIT as we mustn't end the DATA. */ | |
571 | *message = | |
572 | string_sprintf("failed to expand headers_add or headers_remove: %s", | |
573 | expand_string_message); | |
574 | return FALSE; | |
575 | ||
576 | case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */ | |
577 | *message = string_sprintf("failed to write a data block"); | |
578 | return FALSE; | |
0756eb3c | 579 | |
8c5d388a | 580 | #ifdef SUPPORT_I18N |
e9166683 JH |
581 | case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */ |
582 | *message = US"utf8 support required but not offered for forwarding"; | |
583 | DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message); | |
584 | return TRUE; | |
250b6871 | 585 | #endif |
e9166683 | 586 | } |
250b6871 | 587 | |
0756eb3c PH |
588 | /* Handle error responses from the remote mailer. */ |
589 | ||
590 | if (buffer[0] != 0) | |
591 | { | |
e9166683 JH |
592 | *message = string_sprintf("SMTP error from remote mail server after %s%s: " |
593 | "%s", pl, smtp_command, s = string_printing(buffer)); | |
447d236c | 594 | *pass_message = TRUE; |
0756eb3c PH |
595 | *yield = buffer[0]; |
596 | return TRUE; | |
597 | } | |
598 | ||
599 | /* No data was read. If there is no errno, this must be the EOF (i.e. | |
19b9dc85 PH |
600 | connection closed) case, which causes deferral. An explicit connection reset |
601 | error has the same effect. Otherwise, put the host's identity in the message, | |
602 | leaving the errno value to be interpreted as well. In all cases, we have to | |
603 | assume the connection is now dead. */ | |
0756eb3c | 604 | |
19b9dc85 | 605 | if (*errno_value == 0 || *errno_value == ECONNRESET) |
0756eb3c PH |
606 | { |
607 | *errno_value = ERRNO_SMTPCLOSED; | |
c562fd30 | 608 | *message = US string_sprintf("Remote host closed connection " |
02b41d71 | 609 | "in response to %s%s", pl, smtp_command); |
0756eb3c | 610 | } |
de6273b4 JH |
611 | else |
612 | *message = US string_sprintf("%s [%s]", host->name, host->address); | |
0756eb3c PH |
613 | |
614 | return FALSE; | |
615 | } | |
616 | ||
617 | ||
618 | ||
619 | /************************************************* | |
620 | * Write error message to logs * | |
621 | *************************************************/ | |
622 | ||
623 | /* This writes to the main log and to the message log. | |
624 | ||
625 | Arguments: | |
0756eb3c | 626 | host the current host |
ec62d0a9 HSHR |
627 | detail the current message (addr_item->message) |
628 | basic_errno the errno (addr_item->basic_errno) | |
0756eb3c PH |
629 | |
630 | Returns: nothing | |
631 | */ | |
632 | ||
633 | static void | |
ec62d0a9 | 634 | write_logs(const host_item *host, const uschar *suffix, int basic_errno) |
0756eb3c | 635 | { |
ec62d0a9 HSHR |
636 | |
637 | ||
638 | uschar *message = LOGGING(outgoing_port) | |
584ddd64 JH |
639 | ? string_sprintf("H=%s [%s]:%d", host->name, host->address, |
640 | host->port == PORT_NONE ? 25 : host->port) | |
641 | : string_sprintf("H=%s [%s]", host->name, host->address); | |
c562fd30 | 642 | |
ec62d0a9 | 643 | if (suffix) |
0756eb3c | 644 | { |
ec62d0a9 HSHR |
645 | message = string_sprintf("%s: %s", message, suffix); |
646 | if (basic_errno > 0) | |
647 | message = string_sprintf("%s: %s", message, strerror(basic_errno)); | |
0756eb3c PH |
648 | } |
649 | else | |
ec62d0a9 HSHR |
650 | message = string_sprintf("%s %s", message, exim_errstr(basic_errno)); |
651 | ||
652 | log_write(0, LOG_MAIN, "%s", message); | |
653 | deliver_msglog("%s %s\n", tod_stamp(tod_log), message); | |
0756eb3c PH |
654 | } |
655 | ||
c562fd30 JH |
656 | static void |
657 | msglog_line(host_item * host, uschar * message) | |
658 | { | |
37f3dc43 JH |
659 | deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log), |
660 | host->name, host->address, message); | |
c562fd30 JH |
661 | } |
662 | ||
0756eb3c PH |
663 | |
664 | ||
0cbf2b82 | 665 | #ifndef DISABLE_EVENT |
d68218c7 JH |
666 | /************************************************* |
667 | * Post-defer action * | |
668 | *************************************************/ | |
669 | ||
670 | /* This expands an arbitrary per-transport string. | |
671 | It might, for example, be used to write to the database log. | |
672 | ||
673 | Arguments: | |
d68218c7 JH |
674 | addr the address item containing error information |
675 | host the current host | |
676 | ||
677 | Returns: nothing | |
678 | */ | |
679 | ||
680 | static void | |
774ef2d7 | 681 | deferred_event_raise(address_item *addr, host_item *host) |
d68218c7 | 682 | { |
774ef2d7 | 683 | uschar * action = addr->transport->event_action; |
55414b25 | 684 | const uschar * save_domain; |
a7538db1 JH |
685 | uschar * save_local; |
686 | ||
d68218c7 | 687 | if (!action) |
a7538db1 | 688 | return; |
d68218c7 | 689 | |
a7538db1 JH |
690 | save_domain = deliver_domain; |
691 | save_local = deliver_localpart; | |
692 | ||
693 | /*XXX would ip & port already be set up? */ | |
694 | deliver_host_address = string_copy(host->address); | |
774ef2d7 JH |
695 | deliver_host_port = host->port == PORT_NONE ? 25 : host->port; |
696 | event_defer_errno = addr->basic_errno; | |
d68218c7 JH |
697 | |
698 | router_name = addr->router->name; | |
699 | transport_name = addr->transport->name; | |
a7538db1 JH |
700 | deliver_domain = addr->domain; |
701 | deliver_localpart = addr->local_part; | |
702 | ||
774ef2d7 | 703 | (void) event_raise(action, US"msg:host:defer", |
a7538db1 JH |
704 | addr->message |
705 | ? addr->basic_errno > 0 | |
706 | ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno)) | |
707 | : string_copy(addr->message) | |
708 | : addr->basic_errno > 0 | |
709 | ? string_copy(US strerror(addr->basic_errno)) | |
710 | : NULL); | |
711 | ||
712 | deliver_localpart = save_local; | |
713 | deliver_domain = save_domain; | |
d68218c7 JH |
714 | router_name = transport_name = NULL; |
715 | } | |
716 | #endif | |
717 | ||
0756eb3c PH |
718 | /************************************************* |
719 | * Synchronize SMTP responses * | |
720 | *************************************************/ | |
721 | ||
722 | /* This function is called from smtp_deliver() to receive SMTP responses from | |
723 | the server, and match them up with the commands to which they relate. When | |
724 | PIPELINING is not in use, this function is called after every command, and is | |
725 | therefore somewhat over-engineered, but it is simpler to use a single scheme | |
726 | that works both with and without PIPELINING instead of having two separate sets | |
727 | of code. | |
728 | ||
729 | The set of commands that are buffered up with pipelining may start with MAIL | |
730 | and may end with DATA; in between are RCPT commands that correspond to the | |
731 | addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH, | |
732 | etc.) are never buffered. | |
733 | ||
734 | Errors after MAIL or DATA abort the whole process leaving the response in the | |
735 | buffer. After MAIL, pending responses are flushed, and the original command is | |
736 | re-instated in big_buffer for error messages. For RCPT commands, the remote is | |
737 | permitted to reject some recipient addresses while accepting others. However | |
738 | certain errors clearly abort the whole process. Set the value in | |
739 | transport_return to PENDING_OK if the address is accepted. If there is a | |
740 | subsequent general error, it will get reset accordingly. If not, it will get | |
741 | converted to OK at the end. | |
742 | ||
743 | Arguments: | |
df5b41e3 | 744 | sx smtp connection context |
48c7f9e2 | 745 | count the number of responses to read |
48c7f9e2 PH |
746 | pending_DATA 0 if last command sent was not DATA |
747 | +1 if previously had a good recipient | |
748 | -1 if not previously had a good recipient | |
0756eb3c PH |
749 | |
750 | Returns: 3 if at least one address had 2xx and one had 5xx | |
751 | 2 if at least one address had 5xx but none had 2xx | |
752 | 1 if at least one host had a 2xx response, but none had 5xx | |
753 | 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA) | |
754 | -1 timeout while reading RCPT response | |
755 | -2 I/O or other non-response error for RCPT | |
756 | -3 DATA or MAIL failed - errno and buffer set | |
757 | */ | |
758 | ||
759 | static int | |
df5b41e3 | 760 | sync_responses(smtp_context * sx, int count, int pending_DATA) |
0756eb3c | 761 | { |
df5b41e3 | 762 | address_item *addr = sx->sync_addr; |
e9166683 JH |
763 | smtp_transport_options_block *ob = |
764 | (smtp_transport_options_block *)sx->tblock->options_block; | |
0756eb3c PH |
765 | int yield = 0; |
766 | ||
767 | /* Handle the response for a MAIL command. On error, reinstate the original | |
768 | command in big_buffer for error message use, and flush any further pending | |
769 | responses before returning, except after I/O errors and timeouts. */ | |
770 | ||
df5b41e3 | 771 | if (sx->pending_MAIL) |
0756eb3c PH |
772 | { |
773 | count--; | |
e9166683 JH |
774 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
775 | '2', ob->command_timeout)) | |
0756eb3c | 776 | { |
e027f545 | 777 | DEBUG(D_transport) debug_printf("bad response for MAIL\n"); |
0756eb3c | 778 | Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */ |
df5b41e3 | 779 | if (errno == 0 && sx->buffer[0] != 0) |
0756eb3c PH |
780 | { |
781 | uschar flushbuffer[4096]; | |
e97957bc | 782 | int save_errno = 0; |
df5b41e3 | 783 | if (sx->buffer[0] == '4') |
e97957bc PH |
784 | { |
785 | save_errno = ERRNO_MAIL4XX; | |
df5b41e3 | 786 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc | 787 | } |
0756eb3c PH |
788 | while (count-- > 0) |
789 | { | |
df5b41e3 | 790 | if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer), |
e9166683 | 791 | '2', ob->command_timeout) |
0756eb3c PH |
792 | && (errno != 0 || flushbuffer[0] == 0)) |
793 | break; | |
794 | } | |
e97957bc | 795 | errno = save_errno; |
0756eb3c | 796 | } |
c562fd30 JH |
797 | |
798 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
799 | while (count-- > 0) /* Mark any pending addrs with the host used */ | |
800 | { | |
801 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
df5b41e3 | 802 | addr->host_used = sx->host; |
c562fd30 JH |
803 | addr = addr->next; |
804 | } | |
0756eb3c PH |
805 | return -3; |
806 | } | |
807 | } | |
808 | ||
809 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
810 | ||
811 | /* Read and handle the required number of RCPT responses, matching each one up | |
812 | with an address by scanning for the next address whose status is PENDING_DEFER. | |
813 | */ | |
814 | ||
815 | while (count-- > 0) | |
816 | { | |
4c2471ca JH |
817 | while (addr->transport_return != PENDING_DEFER) |
818 | if (!(addr = addr->next)) | |
819 | return -2; | |
0756eb3c PH |
820 | |
821 | /* The address was accepted */ | |
df5b41e3 | 822 | addr->host_used = sx->host; |
0756eb3c | 823 | |
e9166683 JH |
824 | if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
825 | '2', ob->command_timeout)) | |
0756eb3c PH |
826 | { |
827 | yield |= 1; | |
828 | addr->transport_return = PENDING_OK; | |
829 | ||
830 | /* If af_dr_retry_exists is set, there was a routing delay on this address; | |
09945f1e PH |
831 | ensure that any address-specific retry record is expunged. We do this both |
832 | for the basic key and for the version that also includes the sender. */ | |
0756eb3c PH |
833 | |
834 | if (testflag(addr, af_dr_retry_exists)) | |
09945f1e PH |
835 | { |
836 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, | |
837 | sender_address); | |
838 | retry_add_item(addr, altkey, rf_delete); | |
0756eb3c | 839 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
09945f1e | 840 | } |
0756eb3c PH |
841 | } |
842 | ||
843 | /* Timeout while reading the response */ | |
844 | ||
845 | else if (errno == ETIMEDOUT) | |
846 | { | |
c562fd30 | 847 | uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>", |
e9166683 | 848 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
df5b41e3 | 849 | set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE); |
0756eb3c | 850 | retry_add_item(addr, addr->address_retry_key, 0); |
f6c332bd | 851 | update_waiting = FALSE; |
0756eb3c PH |
852 | return -1; |
853 | } | |
854 | ||
855 | /* Handle other errors in obtaining an SMTP response by returning -1. This | |
856 | will cause all the addresses to be deferred. Restore the SMTP command in | |
857 | big_buffer for which we are checking the response, so the error message | |
858 | makes sense. */ | |
859 | ||
df5b41e3 | 860 | else if (errno != 0 || sx->buffer[0] == 0) |
0756eb3c PH |
861 | { |
862 | string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>", | |
df5b41e3 | 863 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
0756eb3c PH |
864 | return -2; |
865 | } | |
866 | ||
867 | /* Handle SMTP permanent and temporary response codes. */ | |
868 | ||
869 | else | |
870 | { | |
871 | addr->message = | |
447d236c | 872 | string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: " |
df5b41e3 JH |
873 | "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes), |
874 | string_printing(sx->buffer)); | |
447d236c | 875 | setflag(addr, af_pass_message); |
e9166683 JH |
876 | if (!sx->verify) |
877 | msglog_line(sx->host, addr->message); | |
0756eb3c PH |
878 | |
879 | /* The response was 5xx */ | |
880 | ||
df5b41e3 | 881 | if (sx->buffer[0] == '5') |
0756eb3c PH |
882 | { |
883 | addr->transport_return = FAIL; | |
884 | yield |= 2; | |
885 | } | |
886 | ||
887 | /* The response was 4xx */ | |
888 | ||
889 | else | |
890 | { | |
0756eb3c PH |
891 | addr->transport_return = DEFER; |
892 | addr->basic_errno = ERRNO_RCPT4XX; | |
df5b41e3 | 893 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
0756eb3c | 894 | |
e9166683 JH |
895 | if (!sx->verify) |
896 | { | |
0cbf2b82 | 897 | #ifndef DISABLE_EVENT |
e9166683 JH |
898 | event_defer_errno = addr->more_errno; |
899 | msg_event_raise(US"msg:rcpt:host:defer", addr); | |
5ef5dd52 JB |
900 | #endif |
901 | ||
e9166683 JH |
902 | /* Log temporary errors if there are more hosts to be tried. |
903 | If not, log this last one in the == line. */ | |
0756eb3c | 904 | |
e9166683 JH |
905 | if (sx->host->next) |
906 | log_write(0, LOG_MAIN, "H=%s [%s]: %s", | |
907 | sx->host->name, sx->host->address, addr->message); | |
0756eb3c | 908 | |
0cbf2b82 | 909 | #ifndef DISABLE_EVENT |
e9166683 JH |
910 | else |
911 | msg_event_raise(US"msg:rcpt:defer", addr); | |
5ef5dd52 JB |
912 | #endif |
913 | ||
e9166683 JH |
914 | /* Do not put this message on the list of those waiting for specific |
915 | hosts, as otherwise it is likely to be tried too often. */ | |
0756eb3c | 916 | |
e9166683 | 917 | update_waiting = FALSE; |
0756eb3c | 918 | |
e9166683 JH |
919 | /* Add a retry item for the address so that it doesn't get tried again |
920 | too soon. If address_retry_include_sender is true, add the sender address | |
921 | to the retry key. */ | |
0756eb3c | 922 | |
e9166683 JH |
923 | retry_add_item(addr, |
924 | ob->address_retry_include_sender | |
925 | ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address) | |
926 | : addr->address_retry_key, | |
927 | 0); | |
928 | } | |
0756eb3c PH |
929 | } |
930 | } | |
931 | } /* Loop for next RCPT response */ | |
932 | ||
933 | /* Update where to start at for the next block of responses, unless we | |
934 | have already handled all the addresses. */ | |
935 | ||
e9166683 | 936 | if (addr) sx->sync_addr = addr->next; |
0756eb3c PH |
937 | |
938 | /* Handle a response to DATA. If we have not had any good recipients, either | |
939 | previously or in this block, the response is ignored. */ | |
940 | ||
941 | if (pending_DATA != 0 && | |
e9166683 JH |
942 | !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
943 | '3', ob->command_timeout)) | |
0756eb3c PH |
944 | { |
945 | int code; | |
946 | uschar *msg; | |
447d236c | 947 | BOOL pass_message; |
e97957bc PH |
948 | if (pending_DATA > 0 || (yield & 1) != 0) |
949 | { | |
df5b41e3 | 950 | if (errno == 0 && sx->buffer[0] == '4') |
e97957bc PH |
951 | { |
952 | errno = ERRNO_DATA4XX; | |
df5b41e3 | 953 | sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc PH |
954 | } |
955 | return -3; | |
956 | } | |
df5b41e3 | 957 | (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message); |
0756eb3c PH |
958 | DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining " |
959 | "is in use and there were no good recipients\n", msg); | |
960 | } | |
961 | ||
962 | /* All responses read and handled; MAIL (if present) received 2xx and DATA (if | |
963 | present) received 3xx. If any RCPTs were handled and yielded anything other | |
964 | than 4xx, yield will be set non-zero. */ | |
965 | ||
966 | return yield; | |
967 | } | |
968 | ||
969 | ||
970 | ||
fcc8e047 JH |
971 | /* Do the client side of smtp-level authentication */ |
972 | /* | |
973 | Arguments: | |
974 | buffer EHLO response from server (gets overwritten) | |
975 | addrlist chain of potential addresses to deliver | |
976 | host host to deliver to | |
977 | ob transport options | |
978 | ibp, obp comms channel control blocks | |
979 | ||
980 | Returns: | |
981 | OK Success, or failed (but not required): global "smtp_authenticated" set | |
982 | DEFER Failed authentication (and was required) | |
983 | ERROR Internal problem | |
984 | ||
985 | FAIL_SEND Failed communications - transmit | |
986 | FAIL - response | |
987 | */ | |
988 | ||
989 | int | |
990 | smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host, | |
991 | smtp_transport_options_block *ob, BOOL is_esmtp, | |
992 | smtp_inblock *ibp, smtp_outblock *obp) | |
993 | { | |
a7538db1 JH |
994 | int require_auth; |
995 | uschar *fail_reason = US"server did not advertise AUTH support"; | |
fcc8e047 | 996 | |
a7538db1 JH |
997 | smtp_authenticated = FALSE; |
998 | client_authenticator = client_authenticated_id = client_authenticated_sender = NULL; | |
5130845b | 999 | require_auth = verify_check_given_host(&ob->hosts_require_auth, host); |
fcc8e047 | 1000 | |
a7538db1 JH |
1001 | if (is_esmtp && !regex_AUTH) regex_AUTH = |
1002 | regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)", | |
1003 | FALSE, TRUE); | |
fcc8e047 | 1004 | |
a7538db1 JH |
1005 | if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1)) |
1006 | { | |
1007 | uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
1008 | expand_nmax = -1; /* reset */ | |
fcc8e047 | 1009 | |
a7538db1 JH |
1010 | /* Must not do this check until after we have saved the result of the |
1011 | regex match above. */ | |
fcc8e047 | 1012 | |
a7538db1 | 1013 | if (require_auth == OK || |
5130845b | 1014 | verify_check_given_host(&ob->hosts_try_auth, host) == OK) |
a7538db1 JH |
1015 | { |
1016 | auth_instance *au; | |
1017 | fail_reason = US"no common mechanisms were found"; | |
fcc8e047 | 1018 | |
a7538db1 | 1019 | DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n"); |
fcc8e047 | 1020 | |
a7538db1 JH |
1021 | /* Scan the configured authenticators looking for one which is configured |
1022 | for use as a client, which is not suppressed by client_condition, and | |
1023 | whose name matches an authentication mechanism supported by the server. | |
1024 | If one is found, attempt to authenticate by calling its client function. | |
1025 | */ | |
fcc8e047 | 1026 | |
cab0c277 | 1027 | for (au = auths; !smtp_authenticated && au; au = au->next) |
a7538db1 JH |
1028 | { |
1029 | uschar *p = names; | |
1030 | if (!au->client || | |
1031 | (au->client_condition != NULL && | |
1032 | !expand_check_condition(au->client_condition, au->name, | |
1033 | US"client authenticator"))) | |
1034 | { | |
1035 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1036 | au->name, | |
1037 | (au->client)? "client_condition is false" : | |
1038 | "not configured as a client"); | |
1039 | continue; | |
1040 | } | |
fcc8e047 | 1041 | |
a7538db1 | 1042 | /* Loop to scan supported server mechanisms */ |
fcc8e047 | 1043 | |
cab0c277 | 1044 | while (*p) |
a7538db1 JH |
1045 | { |
1046 | int rc; | |
1047 | int len = Ustrlen(au->public_name); | |
1048 | while (isspace(*p)) p++; | |
fcc8e047 | 1049 | |
a7538db1 JH |
1050 | if (strncmpic(au->public_name, p, len) != 0 || |
1051 | (p[len] != 0 && !isspace(p[len]))) | |
1052 | { | |
1053 | while (*p != 0 && !isspace(*p)) p++; | |
1054 | continue; | |
1055 | } | |
fcc8e047 | 1056 | |
a7538db1 JH |
1057 | /* Found data for a listed mechanism. Call its client entry. Set |
1058 | a flag in the outblock so that data is overwritten after sending so | |
1059 | that reflections don't show it. */ | |
fcc8e047 | 1060 | |
a7538db1 JH |
1061 | fail_reason = US"authentication attempt(s) failed"; |
1062 | obp->authenticating = TRUE; | |
1063 | rc = (au->info->clientcode)(au, ibp, obp, | |
1064 | ob->command_timeout, buffer, bufsize); | |
1065 | obp->authenticating = FALSE; | |
1066 | DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n", | |
1067 | au->name, rc); | |
fcc8e047 | 1068 | |
a7538db1 JH |
1069 | /* A temporary authentication failure must hold up delivery to |
1070 | this host. After a permanent authentication failure, we carry on | |
1071 | to try other authentication methods. If all fail hard, try to | |
1072 | deliver the message unauthenticated unless require_auth was set. */ | |
fcc8e047 | 1073 | |
a7538db1 JH |
1074 | switch(rc) |
1075 | { | |
1076 | case OK: | |
1077 | smtp_authenticated = TRUE; /* stops the outer loop */ | |
1078 | client_authenticator = au->name; | |
1079 | if (au->set_client_id != NULL) | |
1080 | client_authenticated_id = expand_string(au->set_client_id); | |
1081 | break; | |
1082 | ||
1083 | /* Failure after writing a command */ | |
1084 | ||
1085 | case FAIL_SEND: | |
1086 | return FAIL_SEND; | |
1087 | ||
1088 | /* Failure after reading a response */ | |
1089 | ||
1090 | case FAIL: | |
1091 | if (errno != 0 || buffer[0] != '5') return FAIL; | |
1092 | log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s", | |
1093 | au->name, host->name, host->address, buffer); | |
1094 | break; | |
1095 | ||
1096 | /* Failure by some other means. In effect, the authenticator | |
1097 | decided it wasn't prepared to handle this case. Typically this | |
1098 | is the result of "fail" in an expansion string. Do we need to | |
1099 | log anything here? Feb 2006: a message is now put in the buffer | |
1100 | if logging is required. */ | |
1101 | ||
1102 | case CANCELLED: | |
1103 | if (*buffer != 0) | |
1104 | log_write(0, LOG_MAIN, "%s authenticator cancelled " | |
1105 | "authentication H=%s [%s] %s", au->name, host->name, | |
1106 | host->address, buffer); | |
1107 | break; | |
1108 | ||
1109 | /* Internal problem, message in buffer. */ | |
1110 | ||
1111 | case ERROR: | |
895fbaf2 JH |
1112 | set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer), |
1113 | DEFER, FALSE); | |
a7538db1 JH |
1114 | return ERROR; |
1115 | } | |
fcc8e047 | 1116 | |
a7538db1 JH |
1117 | break; /* If not authenticated, try next authenticator */ |
1118 | } /* Loop for scanning supported server mechanisms */ | |
1119 | } /* Loop for further authenticators */ | |
fcc8e047 | 1120 | } |
a7538db1 | 1121 | } |
fcc8e047 | 1122 | |
a7538db1 | 1123 | /* If we haven't authenticated, but are required to, give up. */ |
fcc8e047 | 1124 | |
a7538db1 JH |
1125 | if (require_auth == OK && !smtp_authenticated) |
1126 | { | |
895fbaf2 | 1127 | set_errno_nohost(addrlist, ERRNO_AUTHFAIL, |
a7538db1 | 1128 | string_sprintf("authentication required but %s", fail_reason), DEFER, |
895fbaf2 | 1129 | FALSE); |
a7538db1 JH |
1130 | return DEFER; |
1131 | } | |
4d8d62b9 | 1132 | |
a7538db1 | 1133 | return OK; |
fcc8e047 JH |
1134 | } |
1135 | ||
1136 | ||
1137 | /* Construct AUTH appendix string for MAIL TO */ | |
1138 | /* | |
1139 | Arguments | |
1140 | buffer to build string | |
1141 | addrlist chain of potential addresses to deliver | |
1142 | ob transport options | |
1143 | ||
1144 | Globals smtp_authenticated | |
1145 | client_authenticated_sender | |
1146 | Return True on error, otherwise buffer has (possibly empty) terminated string | |
1147 | */ | |
1148 | ||
1149 | BOOL | |
1150 | smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist, | |
1151 | smtp_transport_options_block *ob) | |
1152 | { | |
1153 | uschar *local_authenticated_sender = authenticated_sender; | |
1154 | ||
1155 | #ifdef notdef | |
1156 | debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N"); | |
1157 | #endif | |
1158 | ||
1159 | if (ob->authenticated_sender != NULL) | |
1160 | { | |
1161 | uschar *new = expand_string(ob->authenticated_sender); | |
1162 | if (new == NULL) | |
1163 | { | |
1164 | if (!expand_string_forcedfail) | |
1165 | { | |
1166 | uschar *message = string_sprintf("failed to expand " | |
1167 | "authenticated_sender: %s", expand_string_message); | |
895fbaf2 | 1168 | set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
fcc8e047 JH |
1169 | return TRUE; |
1170 | } | |
1171 | } | |
1172 | else if (new[0] != 0) local_authenticated_sender = new; | |
1173 | } | |
1174 | ||
1175 | /* Add the authenticated sender address if present */ | |
1176 | ||
1177 | if ((smtp_authenticated || ob->authenticated_sender_force) && | |
1178 | local_authenticated_sender != NULL) | |
1179 | { | |
1180 | string_format(buffer, bufsize, " AUTH=%s", | |
1181 | auth_xtextencode(local_authenticated_sender, | |
1182 | Ustrlen(local_authenticated_sender))); | |
1183 | client_authenticated_sender = string_copy(local_authenticated_sender); | |
1184 | } | |
1185 | else | |
1186 | *buffer= 0; | |
1187 | ||
1188 | return FALSE; | |
1189 | } | |
1190 | ||
1191 | ||
1192 | ||
0e66b3b6 | 1193 | #ifdef EXPERIMENTAL_DANE |
2d5fdd53 JH |
1194 | /* Lookup TLSA record for host/port. |
1195 | Return: OK success with dnssec; DANE mode | |
1196 | DEFER Do not use this host now, may retry later | |
1197 | FAIL_FORCED No TLSA record; DANE not usable | |
1198 | FAIL Do not use this connection | |
1199 | */ | |
1200 | ||
0e66b3b6 | 1201 | int |
4b0fe319 | 1202 | tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required) |
0e66b3b6 JH |
1203 | { |
1204 | /* move this out to host.c given the similarity to dns_lookup() ? */ | |
1205 | uschar buffer[300]; | |
55414b25 | 1206 | const uschar * fullname = buffer; |
58c30e47 JH |
1207 | int rc; |
1208 | BOOL sec; | |
0e66b3b6 JH |
1209 | |
1210 | /* TLSA lookup string */ | |
1211 | (void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name); | |
1212 | ||
58c30e47 JH |
1213 | rc = dns_lookup(dnsa, buffer, T_TLSA, &fullname); |
1214 | sec = dns_is_secure(dnsa); | |
1215 | DEBUG(D_transport) | |
1216 | debug_printf("TLSA lookup ret %d %sDNSSEC\n", rc, sec ? "" : "not "); | |
1217 | ||
1218 | switch (rc) | |
0e66b3b6 | 1219 | { |
2d5fdd53 JH |
1220 | case DNS_AGAIN: |
1221 | return DEFER; /* just defer this TLS'd conn */ | |
1222 | ||
899b8bbc JH |
1223 | case DNS_SUCCEED: |
1224 | if (sec) return OK; | |
1225 | log_write(0, LOG_MAIN, | |
1226 | "DANE error: TLSA lookup for %s not DNSSEC", host->name); | |
1227 | /*FALLTRHOUGH*/ | |
1228 | ||
ef3a1a30 JH |
1229 | case DNS_NODATA: /* no TLSA RR for this lookup */ |
1230 | case DNS_NOMATCH: /* no records at all for this lookup */ | |
6b524204 | 1231 | return dane_required ? FAIL : FAIL_FORCED; |
2d5fdd53 JH |
1232 | |
1233 | default: | |
1234 | case DNS_FAIL: | |
1235 | return dane_required ? FAIL : DEFER; | |
0e66b3b6 | 1236 | } |
0e66b3b6 JH |
1237 | } |
1238 | #endif | |
1239 | ||
1240 | ||
a39bd74d JB |
1241 | |
1242 | typedef struct smtp_compare_s | |
1243 | { | |
1244 | uschar *current_sender_address; | |
1245 | struct transport_instance *tblock; | |
1246 | } smtp_compare_t; | |
1247 | ||
d093f8e5 JH |
1248 | |
1249 | /* Create a unique string that identifies this message, it is based on | |
1250 | sender_address, helo_data and tls_certificate if enabled. | |
1251 | */ | |
a39bd74d JB |
1252 | |
1253 | static uschar * | |
1254 | smtp_local_identity(uschar * sender, struct transport_instance * tblock) | |
1255 | { | |
1256 | address_item * addr1; | |
1257 | uschar * if1 = US""; | |
1258 | uschar * helo1 = US""; | |
1259 | #ifdef SUPPORT_TLS | |
1260 | uschar * tlsc1 = US""; | |
1261 | #endif | |
1262 | uschar * save_sender_address = sender_address; | |
1263 | uschar * local_identity = NULL; | |
1264 | smtp_transport_options_block * ob = | |
1265 | (smtp_transport_options_block *)tblock->options_block; | |
1266 | ||
1267 | sender_address = sender; | |
1268 | ||
1269 | addr1 = deliver_make_addr (sender, TRUE); | |
1270 | deliver_set_expansions(addr1); | |
1271 | ||
1272 | if (ob->interface) | |
1273 | if1 = expand_string(ob->interface); | |
1274 | ||
1275 | if (ob->helo_data) | |
1276 | helo1 = expand_string(ob->helo_data); | |
1277 | ||
1278 | #ifdef SUPPORT_TLS | |
1279 | if (ob->tls_certificate) | |
1280 | tlsc1 = expand_string(ob->tls_certificate); | |
1281 | local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1); | |
1282 | #else | |
1283 | local_identity = string_sprintf ("%s^%s", if1, helo1); | |
1284 | #endif | |
1285 | ||
1286 | deliver_set_expansions(NULL); | |
1287 | sender_address = save_sender_address; | |
1288 | ||
1289 | return local_identity; | |
1290 | } | |
1291 | ||
1292 | ||
1293 | ||
1294 | /* This routine is a callback that is called from transport_check_waiting. | |
1295 | This function will evaluate the incoming message versus the previous | |
1296 | message. If the incoming message is using a different local identity then | |
1297 | we will veto this new message. */ | |
1298 | ||
1299 | static BOOL | |
1300 | smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare) | |
1301 | { | |
dadff1d4 HSHR |
1302 | uschar * message_local_identity, |
1303 | * current_local_identity, | |
1304 | * new_sender_address; | |
1305 | ||
1306 | current_local_identity = | |
a39bd74d | 1307 | smtp_local_identity(s_compare->current_sender_address, s_compare->tblock); |
a39bd74d | 1308 | |
dadff1d4 HSHR |
1309 | if (!(new_sender_address = deliver_get_sender_address(message_id))) |
1310 | return 0; | |
1311 | ||
1312 | message_local_identity = | |
1313 | smtp_local_identity(new_sender_address, s_compare->tblock); | |
a39bd74d JB |
1314 | |
1315 | return Ustrcmp(current_local_identity, message_local_identity) == 0; | |
1316 | } | |
1317 | ||
1318 | ||
1319 | ||
e9166683 JH |
1320 | static uschar |
1321 | ehlo_response(uschar * buf, uschar checks) | |
9094b84b | 1322 | { |
e9166683 JH |
1323 | size_t bsize = Ustrlen(buf); |
1324 | ||
9094b84b | 1325 | #ifdef SUPPORT_TLS |
14de8063 | 1326 | if ( checks & OPTION_TLS |
ff5aac2b | 1327 | && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1328 | checks &= ~OPTION_TLS; |
9094b84b JH |
1329 | #endif |
1330 | ||
14de8063 | 1331 | if ( checks & OPTION_IGNQ |
ff5aac2b JH |
1332 | && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0, |
1333 | PCRE_EOPT, NULL, 0) < 0) | |
14de8063 | 1334 | checks &= ~OPTION_IGNQ; |
9094b84b | 1335 | |
14de8063 | 1336 | if ( checks & OPTION_CHUNKING |
f98442df | 1337 | && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1338 | checks &= ~OPTION_CHUNKING; |
f98442df | 1339 | |
9094b84b | 1340 | #ifndef DISABLE_PRDR |
14de8063 | 1341 | if ( checks & OPTION_PRDR |
ff5aac2b | 1342 | && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1343 | checks &= ~OPTION_PRDR; |
9094b84b JH |
1344 | #endif |
1345 | ||
1346 | #ifdef SUPPORT_I18N | |
14de8063 | 1347 | if ( checks & OPTION_UTF8 |
ff5aac2b | 1348 | && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1349 | checks &= ~OPTION_UTF8; |
9094b84b JH |
1350 | #endif |
1351 | ||
14de8063 | 1352 | if ( checks & OPTION_DSN |
ff5aac2b | 1353 | && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1354 | checks &= ~OPTION_DSN; |
9094b84b | 1355 | |
14de8063 | 1356 | if ( checks & OPTION_PIPE |
ff5aac2b JH |
1357 | && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0, |
1358 | PCRE_EOPT, NULL, 0) < 0) | |
14de8063 | 1359 | checks &= ~OPTION_PIPE; |
9094b84b | 1360 | |
14de8063 | 1361 | if ( checks & OPTION_SIZE |
ff5aac2b | 1362 | && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) |
14de8063 | 1363 | checks &= ~OPTION_SIZE; |
9094b84b JH |
1364 | |
1365 | return checks; | |
1366 | } | |
1367 | ||
1368 | ||
6d5c916c JH |
1369 | |
1370 | /* Callback for emitting a BDAT data chunk header. | |
6d5c916c | 1371 | |
e027f545 JH |
1372 | If given a nonzero size, first flush any buffered SMTP commands |
1373 | then emit the command. | |
1374 | ||
d2aa036b JH |
1375 | Reap previous SMTP command responses if requested, and always reap |
1376 | the response from a previous BDAT command. | |
1377 | ||
1378 | Args: | |
1379 | tctx transport context | |
1380 | chunk_size value for SMTP BDAT command | |
1381 | flags | |
1382 | tc_chunk_last add LAST option to SMTP BDAT command | |
1383 | tc_reap_prev reap response to previous SMTP commands | |
6d5c916c JH |
1384 | |
1385 | Returns: OK or ERROR | |
1386 | */ | |
1387 | ||
1388 | static int | |
d2aa036b JH |
1389 | smtp_chunk_cmd_callback(transport_ctx * tctx, unsigned chunk_size, |
1390 | unsigned flags) | |
6d5c916c JH |
1391 | { |
1392 | smtp_transport_options_block * ob = | |
1393 | (smtp_transport_options_block *)(tctx->tblock->options_block); | |
e9166683 | 1394 | smtp_context * sx = tctx->smtp_context; |
e027f545 JH |
1395 | int cmd_count = 0; |
1396 | int prev_cmd_count; | |
6d5c916c | 1397 | |
4e910c01 JH |
1398 | /* Write SMTP chunk header command. If not reaping responses, note that |
1399 | there may be more writes (like, the chunk data) done soon. */ | |
6d5c916c | 1400 | |
e027f545 | 1401 | if (chunk_size > 0) |
87cb4a16 | 1402 | { |
4e910c01 JH |
1403 | if((cmd_count = smtp_write_command(&sx->outblock, |
1404 | flags & tc_reap_prev ? SCMD_FLUSH : SCMD_MORE, | |
1405 | "BDAT %u%s\r\n", chunk_size, flags & tc_chunk_last ? " LAST" : "") | |
e027f545 | 1406 | ) < 0) return ERROR; |
87cb4a16 JH |
1407 | if (flags & tc_chunk_last) |
1408 | data_command = string_copy(big_buffer); /* Save for later error message */ | |
1409 | } | |
e027f545 | 1410 | |
e9166683 | 1411 | prev_cmd_count = cmd_count += sx->cmd_count; |
6d5c916c | 1412 | |
e027f545 | 1413 | /* Reap responses for any previous, but not one we just emitted */ |
6d5c916c | 1414 | |
e027f545 JH |
1415 | if (chunk_size > 0) |
1416 | prev_cmd_count--; | |
e9166683 | 1417 | if (sx->pending_BDAT) |
e027f545 | 1418 | prev_cmd_count--; |
6d5c916c | 1419 | |
e027f545 | 1420 | if (flags & tc_reap_prev && prev_cmd_count > 0) |
6d5c916c | 1421 | { |
58fc5fb2 JH |
1422 | DEBUG(D_transport) debug_printf("look for %d responses" |
1423 | " for previous pipelined cmds\n", prev_cmd_count); | |
6d5c916c | 1424 | |
e9166683 | 1425 | switch(sync_responses(sx, prev_cmd_count, 0)) |
e027f545 JH |
1426 | { |
1427 | case 1: /* 2xx (only) => OK */ | |
e9166683 JH |
1428 | case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */ |
1429 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e027f545 JH |
1430 | case 0: break; /* No 2xx or 5xx, but no probs */ |
1431 | ||
1432 | case -1: /* Timeout on RCPT */ | |
1433 | default: return ERROR; /* I/O error, or any MAIL/DATA error */ | |
1434 | } | |
1435 | cmd_count = 1; | |
e9166683 | 1436 | if (!sx->pending_BDAT) |
e027f545 | 1437 | pipelining_active = FALSE; |
6d5c916c | 1438 | } |
e027f545 | 1439 | |
58fc5fb2 | 1440 | /* Reap response for an outstanding BDAT */ |
e027f545 | 1441 | |
e9166683 | 1442 | if (sx->pending_BDAT) |
e027f545 | 1443 | { |
58fc5fb2 JH |
1444 | DEBUG(D_transport) debug_printf("look for one response for BDAT\n"); |
1445 | ||
e9166683 | 1446 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
e027f545 JH |
1447 | ob->command_timeout)) |
1448 | { | |
e9166683 | 1449 | if (errno == 0 && sx->buffer[0] == '4') |
e027f545 JH |
1450 | { |
1451 | errno = ERRNO_DATA4XX; /*XXX does this actually get used? */ | |
36e55f49 | 1452 | sx->addrlist->more_errno |= |
e9166683 | 1453 | ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e027f545 JH |
1454 | } |
1455 | return ERROR; | |
1456 | } | |
1457 | cmd_count--; | |
e9166683 | 1458 | sx->pending_BDAT = FALSE; |
e027f545 JH |
1459 | pipelining_active = FALSE; |
1460 | } | |
1461 | else if (chunk_size > 0) | |
e9166683 | 1462 | sx->pending_BDAT = TRUE; |
e027f545 JH |
1463 | |
1464 | ||
e9166683 | 1465 | sx->cmd_count = cmd_count; |
e027f545 | 1466 | return OK; |
6d5c916c JH |
1467 | } |
1468 | ||
1469 | ||
1470 | ||
0756eb3c | 1471 | /************************************************* |
d093f8e5 | 1472 | * Make connection for given message * |
0756eb3c PH |
1473 | *************************************************/ |
1474 | ||
d093f8e5 JH |
1475 | /* |
1476 | Arguments: | |
1477 | ctx connection context | |
d093f8e5 JH |
1478 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for |
1479 | a second attempt after TLS initialization fails | |
d093f8e5 JH |
1480 | |
1481 | Returns: OK - the connection was made and the delivery attempted; | |
1482 | fd is set in the conn context, tls_out set up. | |
1483 | DEFER - the connection could not be made, or something failed | |
1484 | while setting up the SMTP session, or there was a | |
1485 | non-message-specific error, such as a timeout. | |
1486 | ERROR - helo_data or add_headers or authenticated_sender is | |
1487 | specified for this transport, and the string failed | |
1488 | to expand | |
1489 | */ | |
1490 | int | |
e9166683 | 1491 | smtp_setup_conn(smtp_context * sx, BOOL suppress_tls) |
d093f8e5 JH |
1492 | { |
1493 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) | |
1494 | dns_answer tlsa_dnsa; | |
1495 | #endif | |
1496 | BOOL pass_message = FALSE; | |
d093f8e5 | 1497 | uschar * message = NULL; |
d093f8e5 JH |
1498 | int yield = OK; |
1499 | int rc; | |
1500 | ||
02b41d71 | 1501 | sx->ob = (smtp_transport_options_block *) sx->tblock->options_block; |
d093f8e5 JH |
1502 | |
1503 | sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0; | |
1504 | sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0; | |
1505 | sx->ok = FALSE; | |
1506 | sx->send_rset = TRUE; | |
1507 | sx->send_quit = TRUE; | |
1508 | sx->setting_up = TRUE; | |
1509 | sx->esmtp = TRUE; | |
1510 | sx->esmtp_sent = FALSE; | |
59a286ef | 1511 | #ifdef SUPPORT_I18N |
d093f8e5 | 1512 | sx->utf8_needed = FALSE; |
59a286ef | 1513 | #endif |
d093f8e5 | 1514 | sx->dsn_all_lasthop = TRUE; |
59a286ef | 1515 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
d093f8e5 JH |
1516 | sx->dane = FALSE; |
1517 | sx->dane_required = verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK; | |
1518 | #endif | |
1519 | ||
1520 | if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999; | |
d093f8e5 | 1521 | sx->peer_offered = 0; |
14de8063 | 1522 | sx->avoid_option = 0; |
d093f8e5 | 1523 | sx->igquotstr = US""; |
02b41d71 | 1524 | if (!sx->helo_data) sx->helo_data = sx->ob->helo_data; |
d093f8e5 JH |
1525 | #ifdef EXPERIMENTAL_DSN_INFO |
1526 | sx->smtp_greeting = NULL; | |
1527 | sx->helo_response = NULL; | |
59a286ef JH |
1528 | #endif |
1529 | ||
0756eb3c | 1530 | smtp_command = US"initial connection"; |
d093f8e5 | 1531 | sx->buffer[0] = '\0'; |
0756eb3c PH |
1532 | |
1533 | /* Set up the buffer for reading SMTP response packets. */ | |
1534 | ||
d093f8e5 JH |
1535 | sx->inblock.buffer = sx->inbuffer; |
1536 | sx->inblock.buffersize = sizeof(sx->inbuffer); | |
1537 | sx->inblock.ptr = sx->inbuffer; | |
1538 | sx->inblock.ptrend = sx->inbuffer; | |
0756eb3c PH |
1539 | |
1540 | /* Set up the buffer for holding SMTP commands while pipelining */ | |
1541 | ||
d093f8e5 JH |
1542 | sx->outblock.buffer = sx->outbuffer; |
1543 | sx->outblock.buffersize = sizeof(sx->outbuffer); | |
1544 | sx->outblock.ptr = sx->outbuffer; | |
1545 | sx->outblock.cmd_count = 0; | |
1546 | sx->outblock.authenticating = FALSE; | |
0756eb3c | 1547 | |
6c512171 PH |
1548 | /* Reset the parameters of a TLS session. */ |
1549 | ||
817d9f57 JH |
1550 | tls_out.bits = 0; |
1551 | tls_out.cipher = NULL; /* the one we may use for this transport */ | |
9d1c15ef JH |
1552 | tls_out.ourcert = NULL; |
1553 | tls_out.peercert = NULL; | |
817d9f57 JH |
1554 | tls_out.peerdn = NULL; |
1555 | #if defined(SUPPORT_TLS) && !defined(USE_GNUTLS) | |
1556 | tls_out.sni = NULL; | |
5b456975 | 1557 | #endif |
018058b2 | 1558 | tls_out.ocsp = OCSP_NOT_REQ; |
6c512171 | 1559 | |
35aba663 JH |
1560 | /* Flip the legacy TLS-related variables over to the outbound set in case |
1561 | they're used in the context of the transport. Don't bother resetting | |
02b41d71 JH |
1562 | afterward (when being used by a transport) as we're in a subprocess. |
1563 | For verify, unflipped once the callout is dealt with */ | |
35aba663 JH |
1564 | |
1565 | tls_modify_variables(&tls_out); | |
1566 | ||
061b7ebd | 1567 | #ifndef SUPPORT_TLS |
d093f8e5 | 1568 | if (sx->smtps) |
061b7ebd | 1569 | { |
d093f8e5 | 1570 | set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available", |
895fbaf2 | 1571 | DEFER, FALSE); |
018058b2 | 1572 | return ERROR; |
061b7ebd PP |
1573 | } |
1574 | #endif | |
1575 | ||
0756eb3c PH |
1576 | /* Make a connection to the host if this isn't a continued delivery, and handle |
1577 | the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled | |
1578 | specially so they can be identified for retries. */ | |
1579 | ||
58c30e47 | 1580 | if (!continue_hostname) |
0756eb3c | 1581 | { |
e9166683 | 1582 | if (sx->verify) |
02b41d71 JH |
1583 | HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port); |
1584 | ||
58c30e47 | 1585 | /* Get the actual port the connection will use, into sx->host */ |
4311097e | 1586 | |
58c30e47 | 1587 | smtp_port_for_connect(sx->host, sx->port); |
0756eb3c | 1588 | |
0e66b3b6 | 1589 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
58c30e47 | 1590 | /* Do TLSA lookup for DANE */ |
0e66b3b6 | 1591 | { |
0e66b3b6 JH |
1592 | tls_out.dane_verified = FALSE; |
1593 | tls_out.tlsa_usage = 0; | |
1594 | ||
d093f8e5 | 1595 | if (sx->host->dnssec == DS_YES) |
0e66b3b6 | 1596 | { |
d093f8e5 JH |
1597 | if( sx->dane_required |
1598 | || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK | |
0e66b3b6 | 1599 | ) |
d093f8e5 | 1600 | switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required)) |
4b0fe319 | 1601 | { |
58c30e47 JH |
1602 | case OK: sx->dane = TRUE; |
1603 | sx->ob->tls_tempfail_tryclear = FALSE; | |
1604 | break; | |
2d5fdd53 | 1605 | case FAIL_FORCED: break; |
d093f8e5 | 1606 | default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
2d5fdd53 JH |
1607 | string_sprintf("DANE error: tlsa lookup %s", |
1608 | rc == DEFER ? "DEFER" : "FAIL"), | |
1609 | rc, FALSE); | |
1610 | return rc; | |
4b0fe319 | 1611 | } |
0e66b3b6 | 1612 | } |
d093f8e5 | 1613 | else if (sx->dane_required) |
0e66b3b6 | 1614 | { |
d093f8e5 JH |
1615 | set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
1616 | string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name), | |
895fbaf2 | 1617 | FAIL, FALSE); |
4b0fe319 | 1618 | return FAIL; |
0e66b3b6 | 1619 | } |
0e66b3b6 JH |
1620 | } |
1621 | #endif /*DANE*/ | |
1622 | ||
58c30e47 JH |
1623 | /* Make the TCP connection */ |
1624 | ||
1625 | sx->inblock.sock = sx->outblock.sock = | |
1626 | smtp_connect(sx->host, sx->host_af, sx->interface, | |
1627 | sx->ob->connect_timeout, sx->tblock); | |
1628 | ||
1629 | if (sx->inblock.sock < 0) | |
1630 | { | |
1631 | uschar * msg = NULL; | |
1632 | if (sx->verify) | |
1633 | { | |
1634 | msg = US strerror(errno); | |
1635 | HDEBUG(D_verify) debug_printf("connect: %s\n", msg); | |
1636 | } | |
1637 | set_errno_nohost(sx->addrlist, | |
1638 | errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno, | |
1639 | sx->verify ? string_sprintf("could not connect: %s", msg) | |
1640 | : NULL, | |
1641 | DEFER, FALSE); | |
1642 | sx->send_quit = FALSE; | |
1643 | return DEFER; | |
1644 | } | |
1645 | ||
41c7c167 PH |
1646 | /* Expand the greeting message while waiting for the initial response. (Makes |
1647 | sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is | |
1648 | delayed till here so that $sending_interface and $sending_port are set. */ | |
1649 | ||
02b41d71 JH |
1650 | if (sx->helo_data) |
1651 | if (!(sx->helo_data = expand_string(sx->helo_data))) | |
e9166683 | 1652 | if (sx->verify) |
02b41d71 JH |
1653 | log_write(0, LOG_MAIN|LOG_PANIC, |
1654 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1655 | sx->addrlist->address, expand_string_message); | |
1656 | ||
8c5d388a | 1657 | #ifdef SUPPORT_I18N |
d093f8e5 | 1658 | if (sx->helo_data) |
810d16ad | 1659 | { |
02b41d71 JH |
1660 | expand_string_message = NULL; |
1661 | if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data, | |
1662 | &expand_string_message)), | |
1663 | expand_string_message) | |
e9166683 | 1664 | if (sx->verify) |
02b41d71 JH |
1665 | log_write(0, LOG_MAIN|LOG_PANIC, |
1666 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1667 | sx->addrlist->address, expand_string_message); | |
1668 | else | |
1669 | sx->helo_data = NULL; | |
810d16ad JH |
1670 | } |
1671 | #endif | |
41c7c167 | 1672 | |
0756eb3c PH |
1673 | /* The first thing is to wait for an initial OK response. The dreaded "goto" |
1674 | is nevertheless a reasonably clean way of programming this kind of logic, | |
1675 | where you want to escape on any error. */ | |
1676 | ||
d093f8e5 | 1677 | if (!sx->smtps) |
061b7ebd | 1678 | { |
8d330698 JH |
1679 | BOOL good_response; |
1680 | ||
1681 | #ifdef TCP_QUICKACK | |
d093f8e5 | 1682 | (void) setsockopt(sx->inblock.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off)); |
8d330698 | 1683 | #endif |
d093f8e5 JH |
1684 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1685 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1686 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1687 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
1688 | #endif |
1689 | if (!good_response) goto RESPONSE_FAILED; | |
0756eb3c | 1690 | |
0cbf2b82 | 1691 | #ifndef DISABLE_EVENT |
b30275b8 | 1692 | { |
805c9d53 | 1693 | uschar * s; |
d093f8e5 JH |
1694 | lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes" |
1695 | : sx->host->dnssec==DS_NO ? US"no" : NULL; | |
1696 | s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer); | |
b30275b8 | 1697 | if (s) |
a7538db1 | 1698 | { |
d093f8e5 | 1699 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, |
b30275b8 | 1700 | string_sprintf("deferred by smtp:connect event expansion: %s", s), |
895fbaf2 | 1701 | DEFER, FALSE); |
a7538db1 JH |
1702 | yield = DEFER; |
1703 | goto SEND_QUIT; | |
1704 | } | |
b30275b8 | 1705 | } |
a7538db1 JH |
1706 | #endif |
1707 | ||
061b7ebd PP |
1708 | /* Now check if the helo_data expansion went well, and sign off cleanly if |
1709 | it didn't. */ | |
41c7c167 | 1710 | |
d093f8e5 | 1711 | if (!sx->helo_data) |
061b7ebd | 1712 | { |
d093f8e5 | 1713 | message = string_sprintf("failed to expand helo_data: %s", |
061b7ebd | 1714 | expand_string_message); |
d093f8e5 | 1715 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
061b7ebd PP |
1716 | yield = DEFER; |
1717 | goto SEND_QUIT; | |
1718 | } | |
41c7c167 PH |
1719 | } |
1720 | ||
0756eb3c | 1721 | /** Debugging without sending a message |
d093f8e5 | 1722 | sx->addrlist->transport_return = DEFER; |
0756eb3c PH |
1723 | goto SEND_QUIT; |
1724 | **/ | |
1725 | ||
1726 | /* Errors that occur after this point follow an SMTP command, which is | |
1727 | left in big_buffer by smtp_write_command() for use in error messages. */ | |
1728 | ||
1729 | smtp_command = big_buffer; | |
1730 | ||
1731 | /* Tell the remote who we are... | |
1732 | ||
1733 | February 1998: A convention has evolved that ESMTP-speaking MTAs include the | |
1734 | string "ESMTP" in their greeting lines, so make Exim send EHLO if the | |
1735 | greeting is of this form. The assumption was that the far end supports it | |
1736 | properly... but experience shows that there are some that give 5xx responses, | |
1737 | even though the banner includes "ESMTP" (there's a bloody-minded one that | |
1738 | says "ESMTP not spoken here"). Cope with that case. | |
1739 | ||
1740 | September 2000: Time has passed, and it seems reasonable now to always send | |
1741 | EHLO at the start. It is also convenient to make the change while installing | |
1742 | the TLS stuff. | |
1743 | ||
1744 | July 2003: Joachim Wieland met a broken server that advertises "PIPELINING" | |
1745 | but times out after sending MAIL FROM, RCPT TO and DATA all together. There | |
1746 | would be no way to send out the mails, so there is now a host list | |
1747 | "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the | |
1748 | PIPELINING problem as well. Maybe it can also be useful to cure other | |
1749 | problems with broken servers. | |
1750 | ||
1751 | Exim originally sent "Helo" at this point and ran for nearly a year that way. | |
1752 | Then somebody tried it with a Microsoft mailer... It seems that all other | |
1753 | mailers use upper case for some reason (the RFC is quite clear about case | |
1754 | independence) so, for peace of mind, I gave in. */ | |
1755 | ||
d093f8e5 | 1756 | sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK; |
0756eb3c | 1757 | |
061b7ebd PP |
1758 | /* Alas; be careful, since this goto is not an error-out, so conceivably |
1759 | we might set data between here and the target which we assume to exist | |
1760 | and be usable. I can see this coming back to bite us. */ | |
a7538db1 | 1761 | #ifdef SUPPORT_TLS |
d093f8e5 | 1762 | if (sx->smtps) |
061b7ebd | 1763 | { |
14de8063 | 1764 | smtp_peer_options |= OPTION_TLS; |
061b7ebd | 1765 | suppress_tls = FALSE; |
d093f8e5 | 1766 | sx->ob->tls_tempfail_tryclear = FALSE; |
061b7ebd PP |
1767 | smtp_command = US"SSL-on-connect"; |
1768 | goto TLS_NEGOTIATE; | |
1769 | } | |
a7538db1 | 1770 | #endif |
061b7ebd | 1771 | |
d093f8e5 | 1772 | if (sx->esmtp) |
0756eb3c | 1773 | { |
4e910c01 | 1774 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n", |
d093f8e5 | 1775 | sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0) |
0756eb3c | 1776 | goto SEND_FAILED; |
d093f8e5 JH |
1777 | sx->esmtp_sent = TRUE; |
1778 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', | |
1779 | sx->ob->command_timeout)) | |
0756eb3c | 1780 | { |
d093f8e5 | 1781 | if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp) |
895fbaf2 JH |
1782 | { |
1783 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 1784 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
1785 | #endif |
1786 | goto RESPONSE_FAILED; | |
1787 | } | |
d093f8e5 | 1788 | sx->esmtp = FALSE; |
0756eb3c | 1789 | } |
895fbaf2 | 1790 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1791 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 | 1792 | #endif |
0756eb3c PH |
1793 | } |
1794 | else | |
0756eb3c PH |
1795 | DEBUG(D_transport) |
1796 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
0756eb3c | 1797 | |
d093f8e5 | 1798 | if (!sx->esmtp) |
0756eb3c | 1799 | { |
895fbaf2 | 1800 | BOOL good_response; |
d093f8e5 JH |
1801 | int n = sizeof(sx->buffer); |
1802 | uschar * rsp = sx->buffer; | |
a57ce043 | 1803 | |
d093f8e5 JH |
1804 | if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2) |
1805 | { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; } | |
895fbaf2 | 1806 | |
4e910c01 | 1807 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "HELO %s\r\n", sx->helo_data) < 0) |
0756eb3c | 1808 | goto SEND_FAILED; |
d093f8e5 JH |
1809 | good_response = smtp_read_response(&sx->inblock, rsp, n, |
1810 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1811 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1812 | sx->helo_response = string_copy(rsp); |
895fbaf2 | 1813 | #endif |
a57ce043 JH |
1814 | if (!good_response) |
1815 | { | |
1816 | /* Handle special logging for a closed connection after HELO | |
1817 | when had previously sent EHLO */ | |
1818 | ||
d093f8e5 | 1819 | if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET)) |
a57ce043 | 1820 | { |
de6273b4 JH |
1821 | errno = ERRNO_SMTPCLOSED; |
1822 | goto EHLOHELO_FAILED; | |
a57ce043 | 1823 | } |
e5ab0ba9 | 1824 | memmove(sx->buffer, rsp, Ustrlen(rsp)); |
a57ce043 JH |
1825 | goto RESPONSE_FAILED; |
1826 | } | |
0756eb3c PH |
1827 | } |
1828 | ||
14de8063 | 1829 | sx->avoid_option = sx->peer_offered = smtp_peer_options = 0; |
2d14f397 | 1830 | |
d093f8e5 | 1831 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 1832 | { |
e9166683 | 1833 | sx->peer_offered = ehlo_response(sx->buffer, |
14de8063 | 1834 | OPTION_TLS /* others checked later */ |
9094b84b | 1835 | ); |
f1513293 | 1836 | |
0756eb3c PH |
1837 | /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */ |
1838 | ||
a7538db1 | 1839 | #ifdef SUPPORT_TLS |
14de8063 | 1840 | smtp_peer_options |= sx->peer_offered & OPTION_TLS; |
7ade712c | 1841 | #endif |
2d14f397 | 1842 | } |
0756eb3c PH |
1843 | } |
1844 | ||
57cc2785 JH |
1845 | /* For continuing deliveries down the same channel, having re-exec'd the socket |
1846 | is the standard input; for a socket held open from verify it is recorded | |
1847 | in the cutthrough context block. Either way we don't need to redo EHLO here | |
1848 | (but may need to do so for TLS - see below). | |
1849 | Set up the pointer to where subsequent commands will be left, for | |
2d14f397 | 1850 | error messages. Note that smtp_peer_options will have been |
0756eb3c PH |
1851 | set from the command line if they were set in the process that passed the |
1852 | connection on. */ | |
1853 | ||
895fbaf2 | 1854 | /*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c |
4c04137d | 1855 | as the continue goes via transport_pass_socket() and doublefork and exec. |
895fbaf2 JH |
1856 | It does not wait. Unclear how we keep separate host's responses |
1857 | separate - we could match up by host ip+port as a bodge. */ | |
1858 | ||
0756eb3c PH |
1859 | else |
1860 | { | |
57cc2785 JH |
1861 | if (cutthrough.fd >= 0 && cutthrough.callout_hold_only) |
1862 | { | |
1863 | sx->inblock.sock = sx->outblock.sock = cutthrough.fd; | |
1864 | sx->host->port = sx->port = cutthrough.host.port; | |
1865 | } | |
1866 | else | |
1867 | { | |
1868 | sx->inblock.sock = sx->outblock.sock = 0; /* stdin */ | |
a843a57e | 1869 | smtp_port_for_connect(sx->host, sx->port); /* Record the port that was used */ |
57cc2785 | 1870 | } |
0756eb3c | 1871 | smtp_command = big_buffer; |
02b41d71 | 1872 | sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */ |
875512a3 | 1873 | |
57cc2785 JH |
1874 | /* For a continued connection with TLS being proxied for us, or a |
1875 | held-open verify connection with TLS, nothing more to do. */ | |
875512a3 | 1876 | |
57cc2785 JH |
1877 | if ( continue_proxy_cipher |
1878 | || (cutthrough.fd >= 0 && cutthrough.callout_hold_only && cutthrough.is_tls) | |
1879 | ) | |
875512a3 JH |
1880 | { |
1881 | sx->peer_offered = smtp_peer_options; | |
14de8063 | 1882 | pipelining_active = !!(smtp_peer_options & OPTION_PIPE); |
57cc2785 JH |
1883 | HDEBUG(D_transport) debug_printf("continued connection, %s TLS\n", |
1884 | continue_proxy_cipher ? "proxied" : "verify conn with"); | |
875512a3 JH |
1885 | return OK; |
1886 | } | |
1887 | HDEBUG(D_transport) debug_printf("continued connection, no TLS\n"); | |
0756eb3c PH |
1888 | } |
1889 | ||
1890 | /* If TLS is available on this connection, whether continued or not, attempt to | |
1891 | start up a TLS session, unless the host is in hosts_avoid_tls. If successful, | |
1892 | send another EHLO - the server may give a different answer in secure mode. We | |
1893 | use a separate buffer for reading the response to STARTTLS so that if it is | |
1894 | negative, the original EHLO data is available for subsequent analysis, should | |
1895 | the client not be required to use TLS. If the response is bad, copy the buffer | |
1896 | for error analysis. */ | |
1897 | ||
1898 | #ifdef SUPPORT_TLS | |
14de8063 | 1899 | if ( smtp_peer_options & OPTION_TLS |
5130845b | 1900 | && !suppress_tls |
02b41d71 | 1901 | && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK |
e9166683 | 1902 | && ( !sx->verify |
02b41d71 JH |
1903 | || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK |
1904 | ) ) | |
0756eb3c PH |
1905 | { |
1906 | uschar buffer2[4096]; | |
4e910c01 | 1907 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "STARTTLS\r\n") < 0) |
0756eb3c PH |
1908 | goto SEND_FAILED; |
1909 | ||
1910 | /* If there is an I/O error, transmission of this message is deferred. If | |
1911 | there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is | |
1912 | false, we also defer. However, if there is a temporary rejection of STARTTLS | |
1913 | and tls_tempfail_tryclear is true, or if there is an outright rejection of | |
1914 | STARTTLS, we carry on. This means we will try to send the message in clear, | |
1915 | unless the host is in hosts_require_tls (tested below). */ | |
1916 | ||
d093f8e5 JH |
1917 | if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2', |
1918 | sx->ob->command_timeout)) | |
0756eb3c | 1919 | { |
4b0fe319 JH |
1920 | if ( errno != 0 |
1921 | || buffer2[0] == 0 | |
d093f8e5 | 1922 | || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear) |
4b0fe319 | 1923 | ) |
0dda4340 | 1924 | { |
d093f8e5 | 1925 | Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer)); |
9e7e0f6a | 1926 | sx->buffer[sizeof(sx->buffer)-1] = '\0'; |
0756eb3c | 1927 | goto RESPONSE_FAILED; |
0dda4340 | 1928 | } |
0756eb3c PH |
1929 | } |
1930 | ||
1931 | /* STARTTLS accepted: try to negotiate a TLS session. */ | |
1932 | ||
1933 | else | |
061b7ebd | 1934 | TLS_NEGOTIATE: |
0756eb3c | 1935 | { |
d093f8e5 | 1936 | address_item * addr; |
cf0c6164 JH |
1937 | uschar * errstr; |
1938 | int rc = tls_client_start(sx->inblock.sock, sx->host, sx->addrlist, sx->tblock, | |
0e66b3b6 | 1939 | # ifdef EXPERIMENTAL_DANE |
cf0c6164 | 1940 | sx->dane ? &tlsa_dnsa : NULL, |
0e66b3b6 | 1941 | # endif |
cf0c6164 | 1942 | &errstr); |
0756eb3c PH |
1943 | |
1944 | /* TLS negotiation failed; give an error. From outside, this function may | |
1945 | be called again to try in clear on a new connection, if the options permit | |
1946 | it for this host. */ | |
1947 | ||
1948 | if (rc != OK) | |
1949 | { | |
6ebd79ec | 1950 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 1951 | if (sx->dane) log_write(0, LOG_MAIN, |
cf0c6164 JH |
1952 | "DANE attempt failed; TLS connection to %s [%s]: %s", |
1953 | sx->host->name, sx->host->address, errstr); | |
6ebd79ec JH |
1954 | # endif |
1955 | ||
de6273b4 | 1956 | errno = ERRNO_TLSFAILURE; |
cf0c6164 | 1957 | message = string_sprintf("TLS session: %s", errstr); |
d093f8e5 | 1958 | sx->send_quit = FALSE; |
0756eb3c PH |
1959 | goto TLS_FAILED; |
1960 | } | |
1961 | ||
1962 | /* TLS session is set up */ | |
1963 | ||
2d14f397 | 1964 | smtp_peer_options_wrap = smtp_peer_options; |
d093f8e5 | 1965 | for (addr = sx->addrlist; addr; addr = addr->next) |
5ca2a9a1 PH |
1966 | if (addr->transport_return == PENDING_DEFER) |
1967 | { | |
817d9f57 | 1968 | addr->cipher = tls_out.cipher; |
9d1c15ef JH |
1969 | addr->ourcert = tls_out.ourcert; |
1970 | addr->peercert = tls_out.peercert; | |
817d9f57 | 1971 | addr->peerdn = tls_out.peerdn; |
018058b2 | 1972 | addr->ocsp = tls_out.ocsp; |
5ca2a9a1 | 1973 | } |
0756eb3c PH |
1974 | } |
1975 | } | |
1976 | ||
061b7ebd PP |
1977 | /* if smtps, we'll have smtp_command set to something else; always safe to |
1978 | reset it here. */ | |
1979 | smtp_command = big_buffer; | |
1980 | ||
41c7c167 PH |
1981 | /* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If |
1982 | helo_data is null, we are dealing with a connection that was passed from | |
1983 | another process, and so we won't have expanded helo_data above. We have to | |
1984 | expand it here. $sending_ip_address and $sending_port are set up right at the | |
1985 | start of the Exim process (in exim.c). */ | |
0756eb3c | 1986 | |
817d9f57 | 1987 | if (tls_out.active >= 0) |
0756eb3c | 1988 | { |
061b7ebd | 1989 | char *greeting_cmd; |
895fbaf2 JH |
1990 | BOOL good_response; |
1991 | ||
d093f8e5 | 1992 | if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data))) |
41c7c167 | 1993 | { |
d093f8e5 JH |
1994 | uschar *message = string_sprintf("failed to expand helo_data: %s", |
1995 | expand_string_message); | |
1996 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
1997 | yield = DEFER; | |
1998 | goto SEND_QUIT; | |
41c7c167 PH |
1999 | } |
2000 | ||
0d0e4455 | 2001 | /* For SMTPS we need to wait for the initial OK response. */ |
d093f8e5 | 2002 | if (sx->smtps) |
061b7ebd | 2003 | { |
d093f8e5 JH |
2004 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
2005 | '2', sx->ob->command_timeout); | |
895fbaf2 | 2006 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 2007 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
2008 | #endif |
2009 | if (!good_response) goto RESPONSE_FAILED; | |
0d0e4455 PP |
2010 | } |
2011 | ||
d093f8e5 | 2012 | if (sx->esmtp) |
0d0e4455 PP |
2013 | greeting_cmd = "EHLO"; |
2014 | else | |
2015 | { | |
2016 | greeting_cmd = "HELO"; | |
2017 | DEBUG(D_transport) | |
2018 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
061b7ebd PP |
2019 | } |
2020 | ||
4e910c01 | 2021 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n", |
d093f8e5 | 2022 | sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0) |
0756eb3c | 2023 | goto SEND_FAILED; |
d093f8e5 JH |
2024 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
2025 | '2', sx->ob->command_timeout); | |
895fbaf2 | 2026 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 2027 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
2028 | #endif |
2029 | if (!good_response) goto RESPONSE_FAILED; | |
2d14f397 | 2030 | smtp_peer_options = 0; |
0756eb3c PH |
2031 | } |
2032 | ||
2033 | /* If the host is required to use a secure channel, ensure that we | |
2034 | have one. */ | |
2035 | ||
d093f8e5 | 2036 | else if ( sx->smtps |
0e66b3b6 | 2037 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 2038 | || sx->dane |
0e66b3b6 | 2039 | # endif |
d093f8e5 | 2040 | || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK |
7a31d643 | 2041 | ) |
0756eb3c | 2042 | { |
de6273b4 | 2043 | errno = ERRNO_TLSREQUIRED; |
c562fd30 | 2044 | message = string_sprintf("a TLS session is required, but %s", |
14de8063 | 2045 | smtp_peer_options & OPTION_TLS |
2d14f397 | 2046 | ? "an attempt to start TLS failed" : "the server did not offer TLS support"); |
0756eb3c PH |
2047 | goto TLS_FAILED; |
2048 | } | |
0e66b3b6 | 2049 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
2050 | |
2051 | /* If TLS is active, we have just started it up and re-done the EHLO command, | |
2052 | so its response needs to be analyzed. If TLS is not active and this is a | |
2053 | continued session down a previously-used socket, we haven't just done EHLO, so | |
2054 | we skip this. */ | |
2055 | ||
2056 | if (continue_hostname == NULL | |
a7538db1 | 2057 | #ifdef SUPPORT_TLS |
817d9f57 | 2058 | || tls_out.active >= 0 |
a7538db1 | 2059 | #endif |
0756eb3c PH |
2060 | ) |
2061 | { | |
d093f8e5 | 2062 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 2063 | { |
e9166683 | 2064 | sx->peer_offered = ehlo_response(sx->buffer, |
d093f8e5 | 2065 | 0 /* no TLS */ |
14de8063 JH |
2066 | | (sx->lmtp && sx->ob->lmtp_ignore_quota ? OPTION_IGNQ : 0) |
2067 | | OPTION_CHUNKING | |
2068 | | OPTION_PRDR | |
9094b84b | 2069 | #ifdef SUPPORT_I18N |
14de8063 | 2070 | | (sx->addrlist->prop.utf8_msg ? OPTION_UTF8 : 0) |
d093f8e5 JH |
2071 | /*XXX if we hand peercaps on to continued-conn processes, |
2072 | must not depend on this addr */ | |
9094b84b | 2073 | #endif |
14de8063 JH |
2074 | | OPTION_DSN |
2075 | | OPTION_PIPE | |
2076 | | (sx->ob->size_addition >= 0 ? OPTION_SIZE : 0) | |
9094b84b JH |
2077 | ); |
2078 | ||
2d14f397 JH |
2079 | /* Set for IGNOREQUOTA if the response to LHLO specifies support and the |
2080 | lmtp_ignore_quota option was set. */ | |
f1513293 | 2081 | |
14de8063 | 2082 | sx->igquotstr = sx->peer_offered & OPTION_IGNQ ? US" IGNOREQUOTA" : US""; |
f1513293 | 2083 | |
2d14f397 JH |
2084 | /* If the response to EHLO specified support for the SIZE parameter, note |
2085 | this, provided size_addition is non-negative. */ | |
f1513293 | 2086 | |
14de8063 | 2087 | smtp_peer_options |= sx->peer_offered & OPTION_SIZE; |
0756eb3c | 2088 | |
2d14f397 JH |
2089 | /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched |
2090 | the current host, esmtp will be false, so PIPELINING can never be used. If | |
2091 | the current host matches hosts_avoid_pipelining, don't do it. */ | |
0756eb3c | 2092 | |
14de8063 | 2093 | if ( sx->peer_offered & OPTION_PIPE |
d093f8e5 | 2094 | && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK) |
14de8063 | 2095 | smtp_peer_options |= OPTION_PIPE; |
0756eb3c | 2096 | |
2d14f397 | 2097 | DEBUG(D_transport) debug_printf("%susing PIPELINING\n", |
14de8063 | 2098 | smtp_peer_options & OPTION_PIPE ? "" : "not "); |
0756eb3c | 2099 | |
14de8063 | 2100 | if ( sx->peer_offered & OPTION_CHUNKING |
d093f8e5 | 2101 | && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK) |
14de8063 | 2102 | sx->peer_offered &= ~OPTION_CHUNKING; |
f98442df | 2103 | |
14de8063 | 2104 | if (sx->peer_offered & OPTION_CHUNKING) |
2d14f397 | 2105 | {DEBUG(D_transport) debug_printf("CHUNKING usable\n");} |
0756eb3c | 2106 | |
8ccd00b1 | 2107 | #ifndef DISABLE_PRDR |
14de8063 | 2108 | if ( sx->peer_offered & OPTION_PRDR |
d093f8e5 | 2109 | && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK) |
14de8063 | 2110 | sx->peer_offered &= ~OPTION_PRDR; |
fd98a5c6 | 2111 | |
14de8063 | 2112 | if (sx->peer_offered & OPTION_PRDR) |
2d14f397 | 2113 | {DEBUG(D_transport) debug_printf("PRDR usable\n");} |
fd98a5c6 JH |
2114 | #endif |
2115 | ||
2d14f397 | 2116 | /* Note if the server supports DSN */ |
14de8063 | 2117 | smtp_peer_options |= sx->peer_offered & OPTION_DSN; |
2d14f397 | 2118 | DEBUG(D_transport) debug_printf("%susing DSN\n", |
14de8063 | 2119 | sx->peer_offered & OPTION_DSN ? "" : "not "); |
6c1c3d1d | 2120 | |
2d14f397 JH |
2121 | /* Note if the response to EHLO specifies support for the AUTH extension. |
2122 | If it has, check that this host is one we want to authenticate to, and do | |
2123 | the business. The host name and address must be available when the | |
2124 | authenticator's client driver is running. */ | |
0756eb3c | 2125 | |
d093f8e5 JH |
2126 | switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host, |
2127 | sx->ob, sx->esmtp, &sx->inblock, &sx->outblock)) | |
2d14f397 JH |
2128 | { |
2129 | default: goto SEND_QUIT; | |
2130 | case OK: break; | |
2131 | case FAIL_SEND: goto SEND_FAILED; | |
2132 | case FAIL: goto RESPONSE_FAILED; | |
2133 | } | |
0756eb3c PH |
2134 | } |
2135 | } | |
14de8063 | 2136 | pipelining_active = !!(smtp_peer_options & OPTION_PIPE); |
0756eb3c PH |
2137 | |
2138 | /* The setting up of the SMTP call is now complete. Any subsequent errors are | |
2139 | message-specific. */ | |
2140 | ||
d093f8e5 | 2141 | sx->setting_up = FALSE; |
0756eb3c | 2142 | |
8c5d388a | 2143 | #ifdef SUPPORT_I18N |
d093f8e5 | 2144 | if (sx->addrlist->prop.utf8_msg) |
9094b84b | 2145 | { |
d093f8e5 JH |
2146 | sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt |
2147 | && !sx->addrlist->prop.utf8_downcvt_maybe; | |
2148 | DEBUG(D_transport) if (!sx->utf8_needed) | |
59a286ef | 2149 | debug_printf("utf8: %s downconvert\n", |
d093f8e5 | 2150 | sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional"); |
9094b84b JH |
2151 | } |
2152 | ||
7ade712c | 2153 | /* If this is an international message we need the host to speak SMTPUTF8 */ |
14de8063 | 2154 | if (sx->utf8_needed && !(sx->peer_offered & OPTION_UTF8)) |
7ade712c JH |
2155 | { |
2156 | errno = ERRNO_UTF8_FWD; | |
2157 | goto RESPONSE_FAILED; | |
2158 | } | |
2159 | #endif | |
2160 | ||
d093f8e5 JH |
2161 | return OK; |
2162 | ||
2163 | ||
2164 | { | |
2165 | int code; | |
d093f8e5 JH |
2166 | |
2167 | RESPONSE_FAILED: | |
d093f8e5 | 2168 | message = NULL; |
de6273b4 | 2169 | sx->send_quit = check_response(sx->host, &errno, sx->addrlist->more_errno, |
d093f8e5 JH |
2170 | sx->buffer, &code, &message, &pass_message); |
2171 | goto FAILED; | |
d093f8e5 JH |
2172 | |
2173 | SEND_FAILED: | |
d093f8e5 JH |
2174 | code = '4'; |
2175 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
829dd842 | 2176 | sx->host->name, sx->host->address, strerror(errno)); |
d093f8e5 JH |
2177 | sx->send_quit = FALSE; |
2178 | goto FAILED; | |
d093f8e5 | 2179 | |
de6273b4 JH |
2180 | EHLOHELO_FAILED: |
2181 | code = '4'; | |
2182 | message = string_sprintf("Remote host closed connection in response to %s" | |
2183 | " (EHLO response was: %s)", smtp_command, sx->buffer); | |
2184 | sx->send_quit = FALSE; | |
2185 | goto FAILED; | |
2186 | ||
e5ab0ba9 JH |
2187 | /* This label is jumped to directly when a TLS negotiation has failed, |
2188 | or was not done for a host for which it is required. Values will be set | |
2189 | in message and errno, and setting_up will always be true. Treat as | |
2190 | a temporary error. */ | |
2191 | ||
d093f8e5 JH |
2192 | #ifdef SUPPORT_TLS |
2193 | TLS_FAILED: | |
de6273b4 JH |
2194 | code = '4'; |
2195 | goto FAILED; | |
d093f8e5 JH |
2196 | #endif |
2197 | ||
2198 | /* The failure happened while setting up the call; see if the failure was | |
2199 | a 5xx response (this will either be on connection, or following HELO - a 5xx | |
e69636bc JH |
2200 | after EHLO causes it to try HELO). If so, and there are no more hosts to try, |
2201 | fail all addresses, as this host is never going to accept them. For other | |
2202 | errors during setting up (timeouts or whatever), defer all addresses, and | |
2203 | yield DEFER, so that the host is not tried again for a while. | |
2204 | ||
2205 | XXX This peeking for another host feels like a layering violation. We want | |
2206 | to note the host as unusable, but down here we shouldn't know if this was | |
2207 | the last host to try for the addr(list). Perhaps the upper layer should be | |
2208 | the one to do set_errno() ? The problem is that currently the addr is where | |
2209 | errno etc. are stashed, but until we run out of hosts to try the errors are | |
2210 | host-specific. Maybe we should enhance the host_item definition? */ | |
d093f8e5 | 2211 | |
de6273b4 | 2212 | FAILED: |
d093f8e5 | 2213 | sx->ok = FALSE; /* For when reached by GOTO */ |
e69636bc JH |
2214 | set_errno(sx->addrlist, errno, message, |
2215 | sx->host->next | |
2216 | ? DEFER | |
2217 | : code == '5' | |
d093f8e5 | 2218 | #ifdef SUPPORT_I18N |
e69636bc | 2219 | || errno == ERRNO_UTF8_FWD |
d093f8e5 | 2220 | #endif |
e69636bc JH |
2221 | ? FAIL : DEFER, |
2222 | pass_message, sx->host | |
d093f8e5 JH |
2223 | #ifdef EXPERIMENTAL_DSN_INFO |
2224 | , sx->smtp_greeting, sx->helo_response | |
2225 | #endif | |
2226 | ); | |
e69636bc | 2227 | yield = DEFER; |
d093f8e5 JH |
2228 | } |
2229 | ||
2230 | ||
2231 | SEND_QUIT: | |
2232 | ||
2233 | if (sx->send_quit) | |
4e910c01 | 2234 | (void)smtp_write_command(&sx->outblock, SCMD_FLUSH, "QUIT\r\n"); |
d093f8e5 | 2235 | |
d093f8e5 JH |
2236 | #ifdef SUPPORT_TLS |
2237 | tls_close(FALSE, TRUE); | |
2238 | #endif | |
2239 | ||
2240 | /* Close the socket, and return the appropriate value, first setting | |
2241 | works because the NULL setting is passed back to the calling process, and | |
2242 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
b7d3afcf | 2243 | */ |
d093f8e5 | 2244 | |
e1d04f48 | 2245 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
d093f8e5 JH |
2246 | if (sx->send_quit) |
2247 | { | |
2248 | shutdown(sx->outblock.sock, SHUT_WR); | |
2249 | if (fcntl(sx->inblock.sock, F_SETFL, O_NONBLOCK) == 0) | |
2250 | for (rc = 16; read(sx->inblock.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;) | |
2251 | rc--; /* drain socket */ | |
02b41d71 | 2252 | sx->send_quit = FALSE; |
d093f8e5 JH |
2253 | } |
2254 | (void)close(sx->inblock.sock); | |
02b41d71 | 2255 | sx->inblock.sock = sx->outblock.sock = -1; |
d093f8e5 JH |
2256 | |
2257 | #ifndef DISABLE_EVENT | |
2258 | (void) event_raise(sx->tblock->event_action, US"tcp:close", NULL); | |
2259 | #endif | |
2260 | ||
2261 | continue_transport = NULL; | |
2262 | continue_hostname = NULL; | |
2263 | return yield; | |
2264 | } | |
2265 | ||
2266 | ||
9be4572b JH |
2267 | |
2268 | ||
2269 | /* Create the string of options that will be appended to the MAIL FROM: | |
2270 | in the connection context buffer */ | |
2271 | ||
2272 | static int | |
2273 | build_mailcmd_options(smtp_context * sx, address_item * addrlist) | |
2274 | { | |
2275 | uschar * p = sx->buffer; | |
2276 | address_item * addr; | |
2277 | int address_count; | |
2278 | ||
2279 | *p = 0; | |
2280 | ||
14de8063 | 2281 | /* If we know the receiving MTA supports the SIZE qualification, and we know it, |
9be4572b JH |
2282 | send it, adding something to the message size to allow for imprecision |
2283 | and things that get added en route. Exim keeps the number of lines | |
2284 | in a message, so we can give an accurate value for the original message, but we | |
2285 | need some additional to handle added headers. (Double "." characters don't get | |
2286 | included in the count.) */ | |
2287 | ||
14de8063 JH |
2288 | if ( message_size > 0 |
2289 | && sx->peer_offered & OPTION_SIZE && !(sx->avoid_option & OPTION_SIZE)) | |
9be4572b | 2290 | { |
328c5688 JH |
2291 | /*XXX problem here under spool_files_wireformat? |
2292 | Or just forget about lines? Or inflate by a fixed proportion? */ | |
2293 | ||
9be4572b JH |
2294 | sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition); |
2295 | while (*p) p++; | |
2296 | } | |
2297 | ||
2298 | #ifndef DISABLE_PRDR | |
2299 | /* If it supports Per-Recipient Data Reponses, and we have omre than one recipient, | |
2300 | request that */ | |
2301 | ||
2302 | sx->prdr_active = FALSE; | |
14de8063 | 2303 | if (sx->peer_offered & OPTION_PRDR) |
9be4572b JH |
2304 | for (addr = addrlist; addr; addr = addr->next) |
2305 | if (addr->transport_return == PENDING_DEFER) | |
2306 | { | |
2307 | for (addr = addr->next; addr; addr = addr->next) | |
2308 | if (addr->transport_return == PENDING_DEFER) | |
2309 | { /* at least two recipients to send */ | |
2310 | sx->prdr_active = TRUE; | |
2311 | sprintf(CS p, " PRDR"); p += 5; | |
2312 | break; | |
2313 | } | |
2314 | break; | |
2315 | } | |
2316 | #endif | |
2317 | ||
2318 | #ifdef SUPPORT_I18N | |
2319 | /* If it supports internationalised messages, and this meesage need that, | |
2320 | request it */ | |
2321 | ||
14de8063 | 2322 | if ( sx->peer_offered & OPTION_UTF8 |
9be4572b JH |
2323 | && addrlist->prop.utf8_msg |
2324 | && !addrlist->prop.utf8_downcvt | |
2325 | ) | |
2326 | Ustrcpy(p, " SMTPUTF8"), p += 9; | |
2327 | #endif | |
2328 | ||
2329 | /* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */ | |
2330 | for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0; | |
2331 | addr && address_count < sx->max_rcpt; | |
2332 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2333 | { | |
2334 | address_count++; | |
2335 | if (!(addr->dsn_flags & rf_dsnlasthop)) | |
2336 | { | |
2337 | sx->dsn_all_lasthop = FALSE; | |
2338 | break; | |
2339 | } | |
2340 | } | |
2341 | ||
2342 | /* Add any DSN flags to the mail command */ | |
2343 | ||
14de8063 | 2344 | if (sx->peer_offered & OPTION_DSN && !sx->dsn_all_lasthop) |
9be4572b JH |
2345 | { |
2346 | if (dsn_ret == dsn_ret_hdrs) | |
2347 | { Ustrcpy(p, " RET=HDRS"); p += 9; } | |
2348 | else if (dsn_ret == dsn_ret_full) | |
2349 | { Ustrcpy(p, " RET=FULL"); p += 9; } | |
2350 | ||
2351 | if (dsn_envid) | |
2352 | { | |
2353 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid); | |
2354 | while (*p) p++; | |
2355 | } | |
2356 | } | |
2357 | ||
2358 | /* If an authenticated_sender override has been specified for this transport | |
2359 | instance, expand it. If the expansion is forced to fail, and there was already | |
2360 | an authenticated_sender for this message, the original value will be used. | |
2361 | Other expansion failures are serious. An empty result is ignored, but there is | |
2362 | otherwise no check - this feature is expected to be used with LMTP and other | |
2363 | cases where non-standard addresses (e.g. without domains) might be required. */ | |
2364 | ||
2365 | if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob)) | |
2366 | return ERROR; | |
2367 | ||
2368 | return OK; | |
2369 | } | |
2370 | ||
2371 | ||
2372 | static void | |
2373 | build_rcptcmd_options(smtp_context * sx, const address_item * addr) | |
2374 | { | |
2375 | uschar * p = sx->buffer; | |
2376 | *p = 0; | |
2377 | ||
2378 | /* Add any DSN flags to the rcpt command */ | |
2379 | ||
14de8063 | 2380 | if (sx->peer_offered & OPTION_DSN && !(addr->dsn_flags & rf_dsnlasthop)) |
9be4572b JH |
2381 | { |
2382 | if (addr->dsn_flags & rf_dsnflags) | |
2383 | { | |
2384 | int i; | |
2385 | BOOL first = TRUE; | |
2386 | ||
2387 | Ustrcpy(p, " NOTIFY="); | |
2388 | while (*p) p++; | |
2389 | for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i]) | |
2390 | { | |
2391 | if (!first) *p++ = ','; | |
2392 | first = FALSE; | |
2393 | Ustrcpy(p, rf_names[i]); | |
2394 | while (*p) p++; | |
2395 | } | |
2396 | } | |
2397 | ||
2398 | if (addr->dsn_orcpt) | |
2399 | { | |
2400 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s", | |
2401 | addr->dsn_orcpt); | |
2402 | while (*p) p++; | |
2403 | } | |
2404 | } | |
2405 | } | |
2406 | ||
2407 | ||
d9c3c8ed JH |
2408 | |
2409 | /* | |
2410 | Return: | |
e9166683 JH |
2411 | 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL) |
2412 | -1 MAIL response error | |
2413 | -2 any non-MAIL read i/o error | |
2414 | -3 non-MAIL response timeout | |
2415 | -4 internal error; channel still usable | |
2416 | -5 transmit failed | |
d9c3c8ed JH |
2417 | */ |
2418 | ||
2419 | int | |
2420 | smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield) | |
2421 | { | |
2422 | address_item * addr; | |
2423 | int address_count; | |
2424 | int rc; | |
2425 | ||
2426 | if (build_mailcmd_options(sx, sx->first_addr) != OK) | |
2427 | { | |
2428 | *yield = ERROR; | |
e9166683 | 2429 | return -4; |
d9c3c8ed JH |
2430 | } |
2431 | ||
2432 | /* From here until we send the DATA command, we can make use of PIPELINING | |
2433 | if the server host supports it. The code has to be able to check the responses | |
2434 | at any point, for when the buffer fills up, so we write it totally generally. | |
2435 | When PIPELINING is off, each command written reports that it has flushed the | |
2436 | buffer. */ | |
2437 | ||
2438 | sx->pending_MAIL = TRUE; /* The block starts with MAIL */ | |
2439 | ||
2440 | { | |
2441 | uschar * s = sx->from_addr; | |
2442 | #ifdef SUPPORT_I18N | |
2443 | uschar * errstr = NULL; | |
2444 | ||
2445 | /* If we must downconvert, do the from-address here. Remember we had to | |
2446 | for the to-addresses (done below), and also (ugly) for re-doing when building | |
2447 | the delivery log line. */ | |
2448 | ||
2449 | if ( sx->addrlist->prop.utf8_msg | |
14de8063 | 2450 | && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & OPTION_UTF8)) |
d9c3c8ed JH |
2451 | ) |
2452 | { | |
2453 | if (s = string_address_utf8_to_alabel(s, &errstr), errstr) | |
2454 | { | |
2455 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE); | |
2456 | *yield = ERROR; | |
e9166683 | 2457 | return -4; |
d9c3c8ed JH |
2458 | } |
2459 | setflag(sx->addrlist, af_utf8_downcvt); | |
2460 | } | |
2461 | #endif | |
2462 | ||
4e910c01 | 2463 | rc = smtp_write_command(&sx->outblock, pipelining_active ? SCMD_BUFFER : SCMD_FLUSH, |
d9c3c8ed JH |
2464 | "MAIL FROM:<%s>%s\r\n", s, sx->buffer); |
2465 | } | |
2466 | ||
2467 | mail_command = string_copy(big_buffer); /* Save for later error message */ | |
2468 | ||
2469 | switch(rc) | |
2470 | { | |
2471 | case -1: /* Transmission error */ | |
e9166683 | 2472 | return -5; |
d9c3c8ed | 2473 | |
df5b41e3 | 2474 | case +1: /* Cmd was sent */ |
d9c3c8ed JH |
2475 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
2476 | sx->ob->command_timeout)) | |
2477 | { | |
2478 | if (errno == 0 && sx->buffer[0] == '4') | |
2479 | { | |
2480 | errno = ERRNO_MAIL4XX; | |
2481 | sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
2482 | } | |
2483 | return -1; | |
2484 | } | |
2485 | sx->pending_MAIL = FALSE; | |
2486 | break; | |
e9166683 JH |
2487 | |
2488 | /* otherwise zero: command queued for pipeline */ | |
d9c3c8ed JH |
2489 | } |
2490 | ||
2491 | /* Pass over all the relevant recipient addresses for this host, which are the | |
2492 | ones that have status PENDING_DEFER. If we are using PIPELINING, we can send | |
2493 | several before we have to read the responses for those seen so far. This | |
2494 | checking is done by a subroutine because it also needs to be done at the end. | |
2495 | Send only up to max_rcpt addresses at a time, leaving next_addr pointing to | |
2496 | the next one if not all are sent. | |
2497 | ||
2498 | In the MUA wrapper situation, we want to flush the PIPELINING buffer for the | |
2499 | last address because we want to abort if any recipients have any kind of | |
2500 | problem, temporary or permanent. We know that all recipient addresses will have | |
2501 | the PENDING_DEFER status, because only one attempt is ever made, and we know | |
e9166683 JH |
2502 | that max_rcpt will be large, so all addresses will be done at once. |
2503 | ||
2504 | For verify we flush the pipeline after any (the only) rcpt address. */ | |
d9c3c8ed JH |
2505 | |
2506 | for (addr = sx->first_addr, address_count = 0; | |
2507 | addr && address_count < sx->max_rcpt; | |
2508 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2509 | { | |
2510 | int count; | |
2511 | BOOL no_flush; | |
2512 | uschar * rcpt_addr; | |
2513 | ||
a2673768 | 2514 | if (tcp_out_fastopen && !tcp_out_fastopen_logged) |
1ccd5f67 JH |
2515 | { |
2516 | setflag(addr, af_tcp_fastopen_conn); | |
2517 | if (tcp_out_fastopen > 1) setflag(addr, af_tcp_fastopen); | |
2518 | } | |
a2673768 | 2519 | |
14de8063 | 2520 | addr->dsn_aware = sx->peer_offered & OPTION_DSN |
d9c3c8ed JH |
2521 | ? dsn_support_yes : dsn_support_no; |
2522 | ||
2523 | address_count++; | |
4c2471ca JH |
2524 | no_flush = pipelining_active && !sx->verify |
2525 | && (!mua_wrapper || addr->next && address_count < sx->max_rcpt); | |
d9c3c8ed JH |
2526 | |
2527 | build_rcptcmd_options(sx, addr); | |
2528 | ||
2529 | /* Now send the RCPT command, and process outstanding responses when | |
2530 | necessary. After a timeout on RCPT, we just end the function, leaving the | |
2531 | yield as OK, because this error can often mean that there is a problem with | |
2532 | just one address, so we don't want to delay the host. */ | |
2533 | ||
2534 | rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes); | |
2535 | ||
2536 | #ifdef SUPPORT_I18N | |
2537 | if ( testflag(sx->addrlist, af_utf8_downcvt) | |
2538 | && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL)) | |
2539 | ) | |
2540 | { | |
2541 | /*XXX could we use a per-address errstr here? Not fail the whole send? */ | |
2542 | errno = ERRNO_EXPANDFAIL; | |
e9166683 | 2543 | return -5; /*XXX too harsh? */ |
d9c3c8ed JH |
2544 | } |
2545 | #endif | |
2546 | ||
4e910c01 JH |
2547 | count = smtp_write_command(&sx->outblock, no_flush ? SCMD_BUFFER : SCMD_FLUSH, |
2548 | "RCPT TO:<%s>%s%s\r\n", rcpt_addr, sx->igquotstr, sx->buffer); | |
d9c3c8ed | 2549 | |
e9166683 | 2550 | if (count < 0) return -5; |
d9c3c8ed JH |
2551 | if (count > 0) |
2552 | { | |
df5b41e3 | 2553 | switch(sync_responses(sx, count, 0)) |
d9c3c8ed JH |
2554 | { |
2555 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ | |
2556 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e9166683 | 2557 | break; |
d9c3c8ed JH |
2558 | |
2559 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ | |
2560 | if (!sx->lmtp) /* can't tell about progress yet */ | |
2561 | sx->completed_addr = TRUE; | |
2562 | case 0: /* No 2xx or 5xx, but no probs */ | |
2563 | break; | |
2564 | ||
e9166683 JH |
2565 | case -1: return -3; /* Timeout on RCPT */ |
2566 | case -2: return -2; /* non-MAIL read i/o error */ | |
2567 | default: return -1; /* any MAIL error */ | |
d9c3c8ed JH |
2568 | } |
2569 | sx->pending_MAIL = FALSE; /* Dealt with MAIL */ | |
2570 | } | |
2571 | } /* Loop for next address */ | |
2572 | ||
a2673768 | 2573 | tcp_out_fastopen_logged = TRUE; |
d9c3c8ed JH |
2574 | sx->next_addr = addr; |
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | ||
875512a3 JH |
2579 | #ifdef SUPPORT_TLS |
2580 | /***************************************************** | |
2581 | * Proxy TLS connection for another transport process * | |
2582 | ******************************************************/ | |
2583 | /* | |
d097cc73 JH |
2584 | Close the unused end of the pipe, fork once more, then use the given buffer |
2585 | as a staging area, and select on both the given fd and the TLS'd client-fd for | |
2586 | data to read (per the coding in ip_recv() and fd_ready() this is legitimate). | |
2587 | Do blocking full-size writes, and reads under a timeout. Once both input | |
2588 | channels are closed, exit the process. | |
875512a3 JH |
2589 | |
2590 | Arguments: | |
57cc2785 JH |
2591 | buf space to use for buffering |
2592 | bufsiz size of buffer | |
d097cc73 | 2593 | pfd pipe filedescriptor array; [0] is comms to proxied process |
875512a3 JH |
2594 | timeout per-read timeout, seconds |
2595 | */ | |
2596 | ||
57cc2785 | 2597 | void |
d097cc73 | 2598 | smtp_proxy_tls(uschar * buf, size_t bsize, int * pfd, int timeout) |
875512a3 | 2599 | { |
e47252f5 | 2600 | fd_set rfds, efds; |
d097cc73 | 2601 | int max_fd = MAX(pfd[0], tls_out.active) + 1; |
875512a3 JH |
2602 | int rc, i, fd_bits, nbytes; |
2603 | ||
d097cc73 JH |
2604 | close(pfd[1]); |
2605 | if ((rc = fork())) | |
2606 | { | |
2607 | DEBUG(D_transport) debug_printf("proxy-proc final-pid %d\n", rc); | |
2608 | _exit(rc < 0 ? EXIT_FAILURE : EXIT_SUCCESS); | |
2609 | } | |
2610 | ||
626810b9 | 2611 | if (running_in_test_harness) millisleep(100); /* let parent debug out */ |
875512a3 | 2612 | set_process_info("proxying TLS connection for continued transport"); |
e47252f5 JH |
2613 | FD_ZERO(&rfds); |
2614 | FD_SET(tls_out.active, &rfds); | |
d097cc73 | 2615 | FD_SET(pfd[0], &rfds); |
875512a3 JH |
2616 | |
2617 | for (fd_bits = 3; fd_bits; ) | |
2618 | { | |
2619 | time_t time_left = timeout; | |
2620 | time_t time_start = time(NULL); | |
2621 | ||
2622 | /* wait for data */ | |
e47252f5 | 2623 | efds = rfds; |
875512a3 JH |
2624 | do |
2625 | { | |
2626 | struct timeval tv = { time_left, 0 }; | |
2627 | ||
e47252f5 JH |
2628 | rc = select(max_fd, |
2629 | (SELECT_ARG2_TYPE *)&rfds, NULL, (SELECT_ARG2_TYPE *)&efds, &tv); | |
875512a3 JH |
2630 | |
2631 | if (rc < 0 && errno == EINTR) | |
2632 | if ((time_left -= time(NULL) - time_start) > 0) continue; | |
2633 | ||
2634 | if (rc <= 0) | |
2635 | { | |
2636 | DEBUG(D_transport) if (rc == 0) debug_printf("%s: timed out\n", __FUNCTION__); | |
d097cc73 | 2637 | goto done; |
875512a3 | 2638 | } |
e47252f5 | 2639 | |
d097cc73 | 2640 | if (FD_ISSET(tls_out.active, &efds) || FD_ISSET(pfd[0], &efds)) |
e47252f5 JH |
2641 | { |
2642 | DEBUG(D_transport) debug_printf("select: exceptional cond on %s fd\n", | |
d097cc73 JH |
2643 | FD_ISSET(pfd[0], &efds) ? "proxy" : "tls"); |
2644 | goto done; | |
e47252f5 | 2645 | } |
875512a3 | 2646 | } |
d097cc73 | 2647 | while (rc < 0 || !(FD_ISSET(tls_out.active, &rfds) || FD_ISSET(pfd[0], &rfds))); |
875512a3 JH |
2648 | |
2649 | /* handle inbound data */ | |
e47252f5 | 2650 | if (FD_ISSET(tls_out.active, &rfds)) |
57cc2785 | 2651 | if ((rc = tls_read(FALSE, buf, bsize)) <= 0) |
875512a3 JH |
2652 | { |
2653 | fd_bits &= ~1; | |
e47252f5 | 2654 | FD_CLR(tls_out.active, &rfds); |
d097cc73 | 2655 | shutdown(pfd[0], SHUT_WR); |
e47252f5 | 2656 | timeout = 5; |
875512a3 JH |
2657 | } |
2658 | else | |
2659 | { | |
2660 | for (nbytes = 0; rc - nbytes > 0; nbytes += i) | |
d097cc73 | 2661 | if ((i = write(pfd[0], buf + nbytes, rc - nbytes)) < 0) goto done; |
875512a3 JH |
2662 | } |
2663 | else if (fd_bits & 1) | |
e47252f5 | 2664 | FD_SET(tls_out.active, &rfds); |
875512a3 JH |
2665 | |
2666 | /* handle outbound data */ | |
d097cc73 JH |
2667 | if (FD_ISSET(pfd[0], &rfds)) |
2668 | if ((rc = read(pfd[0], buf, bsize)) <= 0) | |
875512a3 | 2669 | { |
e47252f5 JH |
2670 | fd_bits = 0; |
2671 | tls_close(FALSE, TRUE); | |
875512a3 JH |
2672 | } |
2673 | else | |
2674 | { | |
2675 | for (nbytes = 0; rc - nbytes > 0; nbytes += i) | |
925ac8e4 | 2676 | if ((i = tls_write(FALSE, buf + nbytes, rc - nbytes, FALSE)) < 0) |
d097cc73 | 2677 | goto done; |
875512a3 JH |
2678 | } |
2679 | else if (fd_bits & 2) | |
d097cc73 | 2680 | FD_SET(pfd[0], &rfds); |
875512a3 | 2681 | } |
d097cc73 JH |
2682 | |
2683 | done: | |
2684 | if (running_in_test_harness) millisleep(100); /* let logging complete */ | |
2685 | exim_exit(0, US"TLS proxy"); | |
875512a3 JH |
2686 | } |
2687 | #endif | |
2688 | ||
2689 | ||
d093f8e5 JH |
2690 | /************************************************* |
2691 | * Deliver address list to given host * | |
2692 | *************************************************/ | |
2693 | ||
2694 | /* If continue_hostname is not null, we get here only when continuing to | |
2695 | deliver down an existing channel. The channel was passed as the standard | |
2696 | input. TLS is never active on a passed channel; the previous process always | |
2697 | closes it down before passing the connection on. | |
2698 | ||
2699 | Otherwise, we have to make a connection to the remote host, and do the | |
2700 | initial protocol exchange. | |
2701 | ||
2702 | When running as an MUA wrapper, if the sender or any recipient is rejected, | |
2703 | temporarily or permanently, we force failure for all recipients. | |
2704 | ||
2705 | Arguments: | |
2706 | addrlist chain of potential addresses to deliver; only those whose | |
2707 | transport_return field is set to PENDING_DEFER are currently | |
2708 | being processed; others should be skipped - they have either | |
2709 | been delivered to an earlier host or IP address, or been | |
2710 | failed by one of them. | |
2711 | host host to deliver to | |
2712 | host_af AF_INET or AF_INET6 | |
a843a57e JH |
2713 | defport default TCP/IP port to use if host does not specify, in host |
2714 | byte order | |
d093f8e5 JH |
2715 | interface interface to bind to, or NULL |
2716 | tblock transport instance block | |
2717 | message_defer set TRUE if yield is OK, but all addresses were deferred | |
2718 | because of a non-recipient, non-host failure, that is, a | |
2719 | 4xx response to MAIL FROM, DATA, or ".". This is a defer | |
2720 | that is specific to the message. | |
2721 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for | |
2722 | a second attempt after TLS initialization fails | |
2723 | ||
2724 | Returns: OK - the connection was made and the delivery attempted; | |
2725 | the result for each address is in its data block. | |
2726 | DEFER - the connection could not be made, or something failed | |
2727 | while setting up the SMTP session, or there was a | |
2728 | non-message-specific error, such as a timeout. | |
2729 | ERROR - a filter command is specified for this transport, | |
2730 | and there was a problem setting it up; OR helo_data | |
2731 | or add_headers or authenticated_sender is specified | |
2732 | for this transport, and the string failed to expand | |
2733 | */ | |
2734 | ||
2735 | static int | |
a843a57e | 2736 | smtp_deliver(address_item *addrlist, host_item *host, int host_af, int defport, |
d093f8e5 JH |
2737 | uschar *interface, transport_instance *tblock, |
2738 | BOOL *message_defer, BOOL suppress_tls) | |
2739 | { | |
2740 | address_item *addr; | |
d093f8e5 | 2741 | int yield = OK; |
d093f8e5 JH |
2742 | int save_errno; |
2743 | int rc; | |
32dfdf8b | 2744 | struct timeval start_delivery_time; |
d093f8e5 | 2745 | |
d093f8e5 JH |
2746 | BOOL pass_message = FALSE; |
2747 | uschar *message = NULL; | |
2748 | uschar new_message_id[MESSAGE_ID_LENGTH + 1]; | |
d093f8e5 JH |
2749 | |
2750 | smtp_context sx; | |
2751 | ||
32dfdf8b | 2752 | gettimeofday(&start_delivery_time, NULL); |
d093f8e5 | 2753 | suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */ |
02b41d71 | 2754 | *message_defer = FALSE; |
d093f8e5 JH |
2755 | |
2756 | sx.addrlist = addrlist; | |
2757 | sx.host = host; | |
2758 | sx.host_af = host_af, | |
a843a57e | 2759 | sx.port = defport; |
d093f8e5 | 2760 | sx.interface = interface; |
02b41d71 | 2761 | sx.helo_data = NULL; |
d093f8e5 | 2762 | sx.tblock = tblock; |
e9166683 | 2763 | sx.verify = FALSE; |
d093f8e5 | 2764 | |
9be4572b JH |
2765 | /* Get the channel set up ready for a message (MAIL FROM being the next |
2766 | SMTP command to send */ | |
2767 | ||
e9166683 | 2768 | if ((rc = smtp_setup_conn(&sx, suppress_tls)) != OK) |
d093f8e5 JH |
2769 | return rc; |
2770 | ||
0756eb3c PH |
2771 | /* If there is a filter command specified for this transport, we can now |
2772 | set it up. This cannot be done until the identify of the host is known. */ | |
2773 | ||
e9166683 | 2774 | if (tblock->filter_command) |
0756eb3c | 2775 | { |
9b989985 | 2776 | transport_filter_timeout = tblock->filter_timeout; |
0756eb3c PH |
2777 | |
2778 | /* On failure, copy the error to all addresses, abandon the SMTP call, and | |
2779 | yield ERROR. */ | |
2780 | ||
36d295f1 JH |
2781 | if (!transport_set_up_command(&transport_filter_argv, |
2782 | tblock->filter_command, TRUE, DEFER, addrlist, | |
2783 | string_sprintf("%.50s transport", tblock->name), NULL)) | |
0756eb3c | 2784 | { |
895fbaf2 JH |
2785 | set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER, |
2786 | FALSE); | |
0756eb3c PH |
2787 | yield = ERROR; |
2788 | goto SEND_QUIT; | |
2789 | } | |
48f1c853 JH |
2790 | |
2791 | if ( transport_filter_argv | |
2792 | && *transport_filter_argv | |
2793 | && **transport_filter_argv | |
14de8063 | 2794 | && sx.peer_offered & OPTION_CHUNKING |
48f1c853 JH |
2795 | ) |
2796 | { | |
14de8063 | 2797 | sx.peer_offered &= ~OPTION_CHUNKING; |
48f1c853 JH |
2798 | DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n"); |
2799 | } | |
0756eb3c PH |
2800 | } |
2801 | ||
36d295f1 | 2802 | sx.first_addr = addrlist; |
0756eb3c PH |
2803 | |
2804 | /* For messages that have more than the maximum number of envelope recipients, | |
2805 | we want to send several transactions down the same SMTP connection. (See | |
2806 | comments in deliver.c as to how this reconciles, heuristically, with | |
2807 | remote_max_parallel.) This optimization was added to Exim after the following | |
2808 | code was already working. The simplest way to put it in without disturbing the | |
2809 | code was to use a goto to jump back to this point when there is another | |
2810 | transaction to handle. */ | |
2811 | ||
2812 | SEND_MESSAGE: | |
d9c3c8ed | 2813 | sx.from_addr = return_path; |
36d295f1 | 2814 | sx.sync_addr = sx.first_addr; |
d093f8e5 JH |
2815 | sx.ok = FALSE; |
2816 | sx.send_rset = TRUE; | |
d9c3c8ed | 2817 | sx.completed_addr = FALSE; |
0756eb3c PH |
2818 | |
2819 | ||
57cc2785 JH |
2820 | /* If we are a continued-connection-after-verify the MAIL and RCPT |
2821 | commands were already sent; do not re-send but do mark the addrs as | |
2822 | having been accepted up to RCPT stage. A traditional cont-conn | |
2823 | always has a sequence number greater than one. */ | |
6b62e899 | 2824 | |
57cc2785 | 2825 | if (continue_hostname && continue_sequence == 1) |
0756eb3c | 2826 | { |
57cc2785 | 2827 | address_item * addr; |
0756eb3c | 2828 | |
57cc2785 | 2829 | sx.peer_offered = smtp_peer_options; |
d8b8dd15 | 2830 | sx.pending_MAIL = FALSE; |
57cc2785 JH |
2831 | sx.ok = TRUE; |
2832 | sx.next_addr = NULL; | |
0756eb3c | 2833 | |
57cc2785 JH |
2834 | for (addr = addrlist; addr; addr = addr->next) |
2835 | addr->transport_return = PENDING_OK; | |
2836 | } | |
2837 | else | |
0756eb3c | 2838 | { |
57cc2785 JH |
2839 | /* Initiate a message transfer. */ |
2840 | ||
2841 | switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield)) | |
2842 | { | |
2843 | case 0: break; | |
2844 | case -1: case -2: goto RESPONSE_FAILED; | |
2845 | case -3: goto END_OFF; | |
2846 | case -4: goto SEND_QUIT; | |
2847 | default: goto SEND_FAILED; | |
2848 | } | |
2849 | ||
2850 | /* If we are an MUA wrapper, abort if any RCPTs were rejected, either | |
2851 | permanently or temporarily. We should have flushed and synced after the last | |
2852 | RCPT. */ | |
2853 | ||
2854 | if (mua_wrapper) | |
2855 | { | |
4c2471ca JH |
2856 | address_item * a; |
2857 | unsigned cnt; | |
2858 | ||
2859 | for (a = sx.first_addr, cnt = 0; a && cnt < sx.max_rcpt; a = a->next, cnt++) | |
2860 | if (a->transport_return != PENDING_OK) | |
57cc2785 JH |
2861 | { |
2862 | /*XXX could we find a better errno than 0 here? */ | |
4c2471ca JH |
2863 | set_errno_nohost(addrlist, 0, a->message, FAIL, |
2864 | testflag(a, af_pass_message)); | |
57cc2785 JH |
2865 | sx.ok = FALSE; |
2866 | break; | |
2867 | } | |
2868 | } | |
0756eb3c PH |
2869 | } |
2870 | ||
2871 | /* If ok is TRUE, we know we have got at least one good recipient, and must now | |
2872 | send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still | |
2873 | have a good recipient buffered up if we are pipelining. We don't want to waste | |
2874 | time sending DATA needlessly, so we only send it if either ok is TRUE or if we | |
6d5c916c JH |
2875 | are pipelining. The responses are all handled by sync_responses(). |
2876 | If using CHUNKING, do not send a BDAT until we know how big a chunk we want | |
2877 | to send is. */ | |
0756eb3c | 2878 | |
14de8063 | 2879 | if ( !(sx.peer_offered & OPTION_CHUNKING) |
d093f8e5 | 2880 | && (sx.ok || (pipelining_active && !mua_wrapper))) |
0756eb3c | 2881 | { |
4e910c01 | 2882 | int count = smtp_write_command(&sx.outblock, SCMD_FLUSH, "DATA\r\n"); |
6d5c916c | 2883 | |
0756eb3c | 2884 | if (count < 0) goto SEND_FAILED; |
df5b41e3 | 2885 | switch(sync_responses(&sx, count, sx.ok ? +1 : -1)) |
0756eb3c | 2886 | { |
d093f8e5 | 2887 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 2888 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
0756eb3c PH |
2889 | break; |
2890 | ||
d093f8e5 | 2891 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 2892 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
0756eb3c PH |
2893 | case 0: break; /* No 2xx or 5xx, but no probs */ |
2894 | ||
2895 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
2896 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
2897 | } | |
0d9fa8c0 | 2898 | pipelining_active = FALSE; |
87cb4a16 | 2899 | data_command = string_copy(big_buffer); /* Save for later error message */ |
0756eb3c PH |
2900 | } |
2901 | ||
0756eb3c PH |
2902 | /* If there were no good recipients (but otherwise there have been no |
2903 | problems), just set ok TRUE, since we have handled address-specific errors | |
2904 | already. Otherwise, it's OK to send the message. Use the check/escape mechanism | |
2905 | for handling the SMTP dot-handling protocol, flagging to apply to headers as | |
2906 | well as body. Set the appropriate timeout value to be used for each chunk. | |
2907 | (Haven't been able to make it work using select() for writing yet.) */ | |
2908 | ||
14de8063 | 2909 | if (!(sx.peer_offered & OPTION_CHUNKING) && !sx.ok) |
6d5c916c JH |
2910 | { |
2911 | /* Save the first address of the next batch. */ | |
d9c3c8ed | 2912 | sx.first_addr = sx.next_addr; |
6d5c916c | 2913 | |
d093f8e5 | 2914 | sx.ok = TRUE; |
6d5c916c | 2915 | } |
ff5aac2b | 2916 | else |
0756eb3c | 2917 | { |
6b46ecc6 | 2918 | transport_ctx tctx = { |
cab0c277 | 2919 | {sx.inblock.sock}, |
6b46ecc6 JH |
2920 | tblock, |
2921 | addrlist, | |
2922 | US".", US"..", /* Escaping strings */ | |
65de12cc | 2923 | topt_use_crlf | topt_escape_headers |
6b46ecc6 JH |
2924 | | (tblock->body_only ? topt_no_headers : 0) |
2925 | | (tblock->headers_only ? topt_no_body : 0) | |
2926 | | (tblock->return_path_add ? topt_add_return_path : 0) | |
2927 | | (tblock->delivery_date_add ? topt_add_delivery_date : 0) | |
2928 | | (tblock->envelope_to_add ? topt_add_envelope_to : 0) | |
2929 | }; | |
2930 | ||
6d5c916c JH |
2931 | /* If using CHUNKING we need a callback from the generic transport |
2932 | support to us, for the sending of BDAT smtp commands and the reaping | |
2933 | of responses. The callback needs a whole bunch of state so set up | |
2934 | a transport-context structure to be passed around. */ | |
2935 | ||
14de8063 | 2936 | if (sx.peer_offered & OPTION_CHUNKING) |
59932f7d | 2937 | { |
65de12cc | 2938 | tctx.check_string = tctx.escape_string = NULL; |
6d5c916c JH |
2939 | tctx.options |= topt_use_bdat; |
2940 | tctx.chunk_cb = smtp_chunk_cmd_callback; | |
e9166683 JH |
2941 | sx.pending_BDAT = FALSE; |
2942 | sx.good_RCPT = sx.ok; | |
2943 | sx.cmd_count = 0; | |
2944 | tctx.smtp_context = &sx; | |
59932f7d JH |
2945 | } |
2946 | else | |
65de12cc | 2947 | tctx.options |= topt_end_dot; |
59932f7d | 2948 | |
6d5c916c | 2949 | /* Save the first address of the next batch. */ |
d9c3c8ed | 2950 | sx.first_addr = sx.next_addr; |
6d5c916c | 2951 | |
e027f545 JH |
2952 | /* Responses from CHUNKING commands go in buffer. Otherwise, |
2953 | there has not been a response. */ | |
2954 | ||
d093f8e5 | 2955 | sx.buffer[0] = 0; |
e027f545 | 2956 | |
0756eb3c | 2957 | sigalrm_seen = FALSE; |
d093f8e5 | 2958 | transport_write_timeout = sx.ob->data_timeout; |
0756eb3c PH |
2959 | smtp_command = US"sending data block"; /* For error messages */ |
2960 | DEBUG(D_transport|D_v) | |
14de8063 | 2961 | if (sx.peer_offered & OPTION_CHUNKING) |
6d5c916c JH |
2962 | debug_printf(" will write message using CHUNKING\n"); |
2963 | else | |
2964 | debug_printf(" SMTP>> writing message and terminating \".\"\n"); | |
0756eb3c | 2965 | transport_count = 0; |
a7538db1 | 2966 | |
80a47a2c | 2967 | #ifndef DISABLE_DKIM |
42055a33 | 2968 | sx.ok = dkim_transport_write_message(&tctx, &sx.ob->dkim, CUSS &message); |
4cd12fe9 | 2969 | #else |
42055a33 | 2970 | sx.ok = transport_write_message(&tctx, 0); |
4cd12fe9 | 2971 | #endif |
0756eb3c PH |
2972 | |
2973 | /* transport_write_message() uses write() because it is called from other | |
2974 | places to write to non-sockets. This means that under some OS (e.g. Solaris) | |
2975 | it can exit with "Broken pipe" as its error. This really means that the | |
2976 | socket got closed at the far end. */ | |
2977 | ||
2978 | transport_write_timeout = 0; /* for subsequent transports */ | |
2979 | ||
2980 | /* Failure can either be some kind of I/O disaster (including timeout), | |
e027f545 JH |
2981 | or the failure of a transport filter or the expansion of added headers. |
2982 | Or, when CHUNKING, it can be a protocol-detected failure. */ | |
0756eb3c | 2983 | |
d093f8e5 | 2984 | if (!sx.ok) |
b9df1829 JH |
2985 | if (message) goto SEND_FAILED; |
2986 | else goto RESPONSE_FAILED; | |
0756eb3c PH |
2987 | |
2988 | /* We used to send the terminating "." explicitly here, but because of | |
2989 | buffering effects at both ends of TCP/IP connections, you don't gain | |
2990 | anything by keeping it separate, so it might as well go in the final | |
2991 | data buffer for efficiency. This is now done by setting the topt_end_dot | |
2992 | flag above. */ | |
2993 | ||
2994 | smtp_command = US"end of data"; | |
2995 | ||
14de8063 | 2996 | if (sx.peer_offered & OPTION_CHUNKING && sx.cmd_count > 1) |
6d5c916c JH |
2997 | { |
2998 | /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */ | |
e9166683 | 2999 | switch(sync_responses(&sx, sx.cmd_count-1, 0)) |
6d5c916c | 3000 | { |
d093f8e5 | 3001 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 3002 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
6d5c916c JH |
3003 | break; |
3004 | ||
d093f8e5 | 3005 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 3006 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
6d5c916c JH |
3007 | case 0: break; /* No 2xx or 5xx, but no probs */ |
3008 | ||
3009 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
3010 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
3011 | } | |
3012 | } | |
3013 | ||
8ccd00b1 | 3014 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
3015 | /* For PRDR we optionally get a partial-responses warning |
3016 | * followed by the individual responses, before going on with | |
3017 | * the overall response. If we don't get the warning then deal | |
3018 | * with per non-PRDR. */ | |
d093f8e5 | 3019 | if(sx.prdr_active) |
fd98a5c6 | 3020 | { |
d093f8e5 JH |
3021 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3', |
3022 | sx.ob->final_timeout); | |
3023 | if (!sx.ok && errno == 0) switch(sx.buffer[0]) | |
e027f545 | 3024 | { |
d093f8e5 JH |
3025 | case '2': sx.prdr_active = FALSE; |
3026 | sx.ok = TRUE; | |
e027f545 JH |
3027 | break; |
3028 | case '4': errno = ERRNO_DATA4XX; | |
3029 | addrlist->more_errno |= | |
d093f8e5 | 3030 | ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e027f545 JH |
3031 | break; |
3032 | } | |
fd98a5c6 JH |
3033 | } |
3034 | else | |
3035 | #endif | |
3036 | ||
3037 | /* For non-PRDR SMTP, we now read a single response that applies to the | |
3038 | whole message. If it is OK, then all the addresses have been delivered. */ | |
0756eb3c | 3039 | |
d093f8e5 | 3040 | if (!sx.lmtp) |
e97957bc | 3041 | { |
d093f8e5 JH |
3042 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
3043 | sx.ob->final_timeout); | |
3044 | if (!sx.ok && errno == 0 && sx.buffer[0] == '4') | |
e97957bc PH |
3045 | { |
3046 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 3047 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e97957bc PH |
3048 | } |
3049 | } | |
0756eb3c PH |
3050 | |
3051 | /* For LMTP, we get back a response for every RCPT command that we sent; | |
3052 | some may be accepted and some rejected. For those that get a response, their | |
3053 | status is fixed; any that are accepted have been handed over, even if later | |
3054 | responses crash - at least, that's how I read RFC 2033. | |
3055 | ||
3056 | If all went well, mark the recipient addresses as completed, record which | |
3057 | host/IPaddress they were delivered to, and cut out RSET when sending another | |
3058 | message down the same channel. Write the completed addresses to the journal | |
3059 | now so that they are recorded in case there is a crash of hardware or | |
3060 | software before the spool gets updated. Also record the final SMTP | |
3061 | confirmation if needed (for SMTP only). */ | |
3062 | ||
d093f8e5 | 3063 | if (sx.ok) |
0756eb3c PH |
3064 | { |
3065 | int flag = '='; | |
32dfdf8b | 3066 | struct timeval delivery_time; |
0756eb3c | 3067 | int len; |
32dfdf8b | 3068 | uschar * conf = NULL; |
0d9fa8c0 | 3069 | |
32dfdf8b | 3070 | timesince(&delivery_time, &start_delivery_time); |
d093f8e5 | 3071 | sx.send_rset = FALSE; |
0d9fa8c0 | 3072 | pipelining_active = FALSE; |
0756eb3c | 3073 | |
0756eb3c PH |
3074 | /* Set up confirmation if needed - applies only to SMTP */ |
3075 | ||
d68218c7 | 3076 | if ( |
0cbf2b82 | 3077 | #ifdef DISABLE_EVENT |
6c6d6e48 | 3078 | LOGGING(smtp_confirmation) && |
a7538db1 | 3079 | #endif |
d093f8e5 | 3080 | !sx.lmtp |
d68218c7 | 3081 | ) |
0756eb3c | 3082 | { |
d093f8e5 | 3083 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 3084 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
5903c6ff | 3085 | conf = (s == sx.buffer)? US string_copy(s) : US s; |
0756eb3c PH |
3086 | } |
3087 | ||
fd98a5c6 | 3088 | /* Process all transported addresses - for LMTP or PRDR, read a status for |
0756eb3c PH |
3089 | each one. */ |
3090 | ||
d9c3c8ed | 3091 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
0756eb3c PH |
3092 | { |
3093 | if (addr->transport_return != PENDING_OK) continue; | |
3094 | ||
3095 | /* LMTP - if the response fails badly (e.g. timeout), use it for all the | |
3096 | remaining addresses. Otherwise, it's a return code for just the one | |
75def545 PH |
3097 | address. For temporary errors, add a retry item for the address so that |
3098 | it doesn't get tried again too soon. */ | |
0756eb3c | 3099 | |
8ccd00b1 | 3100 | #ifndef DISABLE_PRDR |
d093f8e5 | 3101 | if (sx.lmtp || sx.prdr_active) |
fd98a5c6 | 3102 | #else |
d093f8e5 | 3103 | if (sx.lmtp) |
fd98a5c6 | 3104 | #endif |
0756eb3c | 3105 | { |
d093f8e5 JH |
3106 | if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
3107 | sx.ob->final_timeout)) | |
0756eb3c | 3108 | { |
d093f8e5 | 3109 | if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED; |
fd98a5c6 | 3110 | addr->message = string_sprintf( |
8ccd00b1 | 3111 | #ifndef DISABLE_PRDR |
d093f8e5 | 3112 | "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP", |
fd98a5c6 JH |
3113 | #else |
3114 | "LMTP error after %s: %s", | |
3115 | #endif | |
d093f8e5 | 3116 | data_command, string_printing(sx.buffer)); |
75def545 | 3117 | setflag(addr, af_pass_message); /* Allow message to go to user */ |
d093f8e5 | 3118 | if (sx.buffer[0] == '5') |
75def545 PH |
3119 | addr->transport_return = FAIL; |
3120 | else | |
3121 | { | |
e97957bc | 3122 | errno = ERRNO_DATA4XX; |
d093f8e5 | 3123 | addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
75def545 | 3124 | addr->transport_return = DEFER; |
8ccd00b1 | 3125 | #ifndef DISABLE_PRDR |
d093f8e5 | 3126 | if (!sx.prdr_active) |
fd98a5c6 JH |
3127 | #endif |
3128 | retry_add_item(addr, addr->address_retry_key, 0); | |
75def545 | 3129 | } |
0756eb3c PH |
3130 | continue; |
3131 | } | |
d9c3c8ed | 3132 | sx.completed_addr = TRUE; /* NOW we can set this flag */ |
6c6d6e48 | 3133 | if (LOGGING(smtp_confirmation)) |
c0ea85ab | 3134 | { |
d093f8e5 | 3135 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 3136 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
d093f8e5 | 3137 | conf = (s == sx.buffer) ? US string_copy(s) : US s; |
c0ea85ab | 3138 | } |
0756eb3c PH |
3139 | } |
3140 | ||
3141 | /* SMTP, or success return from LMTP for this address. Pass back the | |
2d280592 | 3142 | actual host that was used. */ |
0756eb3c PH |
3143 | |
3144 | addr->transport_return = OK; | |
32dfdf8b JH |
3145 | addr->more_errno = delivery_time.tv_sec; |
3146 | addr->delivery_usec = delivery_time.tv_usec; | |
d427a7f9 | 3147 | addr->host_used = host; |
0756eb3c PH |
3148 | addr->special_action = flag; |
3149 | addr->message = conf; | |
8ccd00b1 | 3150 | #ifndef DISABLE_PRDR |
7eb0e5d2 | 3151 | if (sx.prdr_active) setflag(addr, af_prdr_used); |
fd98a5c6 | 3152 | #endif |
7eb0e5d2 | 3153 | if (sx.peer_offered & OPTION_CHUNKING) setflag(addr, af_chunking_used); |
0756eb3c PH |
3154 | flag = '-'; |
3155 | ||
8ccd00b1 | 3156 | #ifndef DISABLE_PRDR |
d093f8e5 | 3157 | if (!sx.prdr_active) |
fd98a5c6 JH |
3158 | #endif |
3159 | { | |
3160 | /* Update the journal. For homonymic addresses, use the base address plus | |
3161 | the transport name. See lots of comments in deliver.c about the reasons | |
3162 | for the complications when homonyms are involved. Just carry on after | |
3163 | write error, as it may prove possible to update the spool file later. */ | |
4d8d62b9 | 3164 | |
fd98a5c6 | 3165 | if (testflag(addr, af_homonym)) |
d093f8e5 | 3166 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); |
fd98a5c6 | 3167 | else |
d093f8e5 | 3168 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); |
4d8d62b9 | 3169 | |
5bfe3b35 | 3170 | DEBUG(D_deliver) debug_printf("S:journalling %s\n", sx.buffer); |
d093f8e5 JH |
3171 | len = Ustrlen(CS sx.buffer); |
3172 | if (write(journal_fd, sx.buffer, len) != len) | |
fd98a5c6 | 3173 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " |
d093f8e5 | 3174 | "%s: %s", sx.buffer, strerror(errno)); |
fd98a5c6 | 3175 | } |
0756eb3c PH |
3176 | } |
3177 | ||
8ccd00b1 | 3178 | #ifndef DISABLE_PRDR |
d093f8e5 | 3179 | if (sx.prdr_active) |
fd98a5c6 JH |
3180 | { |
3181 | /* PRDR - get the final, overall response. For any non-success | |
3182 | upgrade all the address statuses. */ | |
d093f8e5 JH |
3183 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
3184 | sx.ob->final_timeout); | |
3185 | if (!sx.ok) | |
fd98a5c6 | 3186 | { |
d093f8e5 | 3187 | if(errno == 0 && sx.buffer[0] == '4') |
fd98a5c6 JH |
3188 | { |
3189 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 3190 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
fd98a5c6 | 3191 | } |
d9c3c8ed | 3192 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
d093f8e5 | 3193 | if (sx.buffer[0] == '5' || addr->transport_return == OK) |
fd98a5c6 JH |
3194 | addr->transport_return = PENDING_OK; /* allow set_errno action */ |
3195 | goto RESPONSE_FAILED; | |
3196 | } | |
3197 | ||
3198 | /* Update the journal, or setup retry. */ | |
d9c3c8ed | 3199 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
fd98a5c6 | 3200 | if (addr->transport_return == OK) |
9be4572b JH |
3201 | { |
3202 | if (testflag(addr, af_homonym)) | |
3203 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); | |
3204 | else | |
3205 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); | |
3206 | ||
3207 | DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer); | |
3208 | len = Ustrlen(CS sx.buffer); | |
3209 | if (write(journal_fd, sx.buffer, len) != len) | |
3210 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " | |
3211 | "%s: %s", sx.buffer, strerror(errno)); | |
3212 | } | |
3213 | else if (addr->transport_return == DEFER) | |
3214 | retry_add_item(addr, addr->address_retry_key, -2); | |
fd98a5c6 JH |
3215 | } |
3216 | #endif | |
3217 | ||
0756eb3c PH |
3218 | /* Ensure the journal file is pushed out to disk. */ |
3219 | ||
54fc8428 | 3220 | if (EXIMfsync(journal_fd) < 0) |
0756eb3c PH |
3221 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", |
3222 | strerror(errno)); | |
3223 | } | |
3224 | } | |
3225 | ||
3226 | ||
3227 | /* Handle general (not specific to one address) failures here. The value of ok | |
3228 | is used to skip over this code on the falling through case. A timeout causes a | |
3229 | deferral. Other errors may defer or fail according to the response code, and | |
3230 | may set up a special errno value, e.g. after connection chopped, which is | |
3231 | assumed if errno == 0 and there is no text in the buffer. If control reaches | |
3232 | here during the setting up phase (i.e. before MAIL FROM) then always defer, as | |
3233 | the problem is not related to this specific message. */ | |
3234 | ||
d093f8e5 | 3235 | if (!sx.ok) |
0756eb3c | 3236 | { |
895fbaf2 JH |
3237 | int code, set_rc; |
3238 | uschar * set_message; | |
0756eb3c PH |
3239 | |
3240 | RESPONSE_FAILED: | |
895fbaf2 JH |
3241 | { |
3242 | save_errno = errno; | |
3243 | message = NULL; | |
d093f8e5 JH |
3244 | sx.send_quit = check_response(host, &save_errno, addrlist->more_errno, |
3245 | sx.buffer, &code, &message, &pass_message); | |
895fbaf2 JH |
3246 | goto FAILED; |
3247 | } | |
0756eb3c PH |
3248 | |
3249 | SEND_FAILED: | |
895fbaf2 JH |
3250 | { |
3251 | save_errno = errno; | |
3252 | code = '4'; | |
b9df1829 | 3253 | message = string_sprintf("send() to %s [%s] failed: %s", |
c0ad8edf | 3254 | host->name, host->address, message ? message : US strerror(save_errno)); |
d093f8e5 | 3255 | sx.send_quit = FALSE; |
895fbaf2 JH |
3256 | goto FAILED; |
3257 | } | |
0756eb3c | 3258 | |
0756eb3c | 3259 | FAILED: |
9be4572b JH |
3260 | { |
3261 | BOOL message_error; | |
0756eb3c | 3262 | |
9be4572b JH |
3263 | sx.ok = FALSE; /* For when reached by GOTO */ |
3264 | set_message = message; | |
0756eb3c | 3265 | |
e97957bc | 3266 | /* We want to handle timeouts after MAIL or "." and loss of connection after |
0756eb3c | 3267 | "." specially. They can indicate a problem with the sender address or with |
e97957bc PH |
3268 | the contents of the message rather than a real error on the connection. These |
3269 | cases are treated in the same way as a 4xx response. This next bit of code | |
3270 | does the classification. */ | |
0756eb3c | 3271 | |
e97957bc PH |
3272 | switch(save_errno) |
3273 | { | |
3274 | case 0: | |
3275 | case ERRNO_MAIL4XX: | |
3276 | case ERRNO_DATA4XX: | |
250b6871 JH |
3277 | message_error = TRUE; |
3278 | break; | |
0756eb3c | 3279 | |
e97957bc | 3280 | case ETIMEDOUT: |
250b6871 JH |
3281 | message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 || |
3282 | Ustrncmp(smtp_command,"end ",4) == 0; | |
3283 | break; | |
e97957bc PH |
3284 | |
3285 | case ERRNO_SMTPCLOSED: | |
250b6871 JH |
3286 | message_error = Ustrncmp(smtp_command,"end ",4) == 0; |
3287 | break; | |
e97957bc PH |
3288 | |
3289 | default: | |
250b6871 JH |
3290 | message_error = FALSE; |
3291 | break; | |
e97957bc | 3292 | } |
0756eb3c | 3293 | |
e97957bc | 3294 | /* Handle the cases that are treated as message errors. These are: |
0756eb3c | 3295 | |
e97957bc PH |
3296 | (a) negative response or timeout after MAIL |
3297 | (b) negative response after DATA | |
3298 | (c) negative response or timeout or dropped connection after "." | |
250b6871 | 3299 | (d) utf8 support required and not offered |
0756eb3c | 3300 | |
e97957bc PH |
3301 | It won't be a negative response or timeout after RCPT, as that is dealt |
3302 | with separately above. The action in all cases is to set an appropriate | |
3303 | error code for all the addresses, but to leave yield set to OK because the | |
3304 | host itself has not failed. Of course, it might in practice have failed | |
3305 | when we've had a timeout, but if so, we'll discover that at the next | |
3306 | delivery attempt. For a temporary error, set the message_defer flag, and | |
3307 | write to the logs for information if this is not the last host. The error | |
3308 | for the last host will be logged as part of the address's log line. */ | |
3309 | ||
3310 | if (message_error) | |
0756eb3c | 3311 | { |
e97957bc | 3312 | if (mua_wrapper) code = '5'; /* Force hard failure in wrapper mode */ |
e97957bc PH |
3313 | |
3314 | /* If there's an errno, the message contains just the identity of | |
3315 | the host. */ | |
3316 | ||
895fbaf2 JH |
3317 | if (code == '5') |
3318 | set_rc = FAIL; | |
3319 | else /* Anything other than 5 is treated as temporary */ | |
e97957bc | 3320 | { |
895fbaf2 | 3321 | set_rc = DEFER; |
e97957bc PH |
3322 | if (save_errno > 0) |
3323 | message = US string_sprintf("%s: %s", message, strerror(save_errno)); | |
ec62d0a9 HSHR |
3324 | |
3325 | write_logs(host, message, sx.first_addr ? sx.first_addr->basic_errno : 0); | |
3326 | ||
e97957bc PH |
3327 | *message_defer = TRUE; |
3328 | } | |
3329 | } | |
3330 | ||
3331 | /* Otherwise, we have an I/O error or a timeout other than after MAIL or | |
3332 | ".", or some other transportation error. We defer all addresses and yield | |
3333 | DEFER, except for the case of failed add_headers expansion, or a transport | |
3334 | filter failure, when the yield should be ERROR, to stop it trying other | |
3335 | hosts. */ | |
3336 | ||
3337 | else | |
3338 | { | |
895fbaf2 | 3339 | set_rc = DEFER; |
e97957bc PH |
3340 | yield = (save_errno == ERRNO_CHHEADER_FAIL || |
3341 | save_errno == ERRNO_FILTER_FAIL)? ERROR : DEFER; | |
0756eb3c PH |
3342 | } |
3343 | } | |
895fbaf2 JH |
3344 | |
3345 | set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host | |
3346 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 3347 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3348 | #endif |
3349 | ); | |
0756eb3c PH |
3350 | } |
3351 | ||
3352 | ||
3353 | /* If all has gone well, send_quit will be set TRUE, implying we can end the | |
3354 | SMTP session tidily. However, if there were too many addresses to send in one | |
3355 | message (indicated by first_addr being non-NULL) we want to carry on with the | |
3356 | rest of them. Also, it is desirable to send more than one message down the SMTP | |
3357 | connection if there are several waiting, provided we haven't already sent so | |
3358 | many as to hit the configured limit. The function transport_check_waiting looks | |
3359 | for a waiting message and returns its id. Then transport_pass_socket tries to | |
3360 | set up a continued delivery by passing the socket on to another process. The | |
3361 | variable send_rset is FALSE if a message has just been successfully transfered. | |
3362 | ||
3363 | If we are already sending down a continued channel, there may be further | |
3364 | addresses not yet delivered that are aimed at the same host, but which have not | |
3365 | been passed in this run of the transport. In this case, continue_more will be | |
3366 | true, and all we should do is send RSET if necessary, and return, leaving the | |
3367 | channel open. | |
3368 | ||
3369 | However, if no address was disposed of, i.e. all addresses got 4xx errors, we | |
3370 | do not want to continue with other messages down the same channel, because that | |
3371 | can lead to looping between two or more messages, all with the same, | |
3372 | temporarily failing address(es). [The retry information isn't updated yet, so | |
3373 | new processes keep on trying.] We probably also don't want to try more of this | |
3374 | message's addresses either. | |
3375 | ||
3376 | If we have started a TLS session, we have to end it before passing the | |
3377 | connection to a new process. However, not all servers can handle this (Exim | |
3378 | can), so we do not pass such a connection on if the host matches | |
3379 | hosts_nopass_tls. */ | |
3380 | ||
3381 | DEBUG(D_transport) | |
3382 | debug_printf("ok=%d send_quit=%d send_rset=%d continue_more=%d " | |
d093f8e5 | 3383 | "yield=%d first_address is %sNULL\n", sx.ok, sx.send_quit, |
d9c3c8ed | 3384 | sx.send_rset, continue_more, yield, sx.first_addr ? "not " : ""); |
0756eb3c | 3385 | |
d9c3c8ed | 3386 | if (sx.completed_addr && sx.ok && sx.send_quit) |
0756eb3c PH |
3387 | { |
3388 | BOOL more; | |
a39bd74d JB |
3389 | smtp_compare_t t_compare; |
3390 | ||
3391 | t_compare.tblock = tblock; | |
3392 | t_compare.current_sender_address = sender_address; | |
3393 | ||
d9c3c8ed | 3394 | if ( sx.first_addr != NULL |
5130845b | 3395 | || continue_more |
875512a3 JH |
3396 | || ( |
3397 | #ifdef SUPPORT_TLS | |
5013d912 | 3398 | ( tls_out.active < 0 && !continue_proxy_cipher |
d093f8e5 | 3399 | || verify_check_given_host(&sx.ob->hosts_nopass_tls, host) != OK |
5130845b | 3400 | ) |
0756eb3c | 3401 | && |
875512a3 | 3402 | #endif |
0756eb3c | 3403 | transport_check_waiting(tblock->name, host->name, |
a39bd74d JB |
3404 | tblock->connection_max_messages, new_message_id, &more, |
3405 | (oicf)smtp_are_same_identities, (void*)&t_compare) | |
5130845b | 3406 | ) ) |
0756eb3c PH |
3407 | { |
3408 | uschar *msg; | |
447d236c | 3409 | BOOL pass_message; |
0756eb3c | 3410 | |
d093f8e5 | 3411 | if (sx.send_rset) |
4e910c01 | 3412 | if (! (sx.ok = smtp_write_command(&sx.outblock, SCMD_FLUSH, "RSET\r\n") >= 0)) |
0756eb3c PH |
3413 | { |
3414 | msg = US string_sprintf("send() to %s [%s] failed: %s", host->name, | |
9e7e0f6a | 3415 | host->address, strerror(errno)); |
d093f8e5 | 3416 | sx.send_quit = FALSE; |
0756eb3c | 3417 | } |
d093f8e5 JH |
3418 | else if (! (sx.ok = smtp_read_response(&sx.inblock, sx.buffer, |
3419 | sizeof(sx.buffer), '2', sx.ob->command_timeout))) | |
0756eb3c PH |
3420 | { |
3421 | int code; | |
d093f8e5 | 3422 | sx.send_quit = check_response(host, &errno, 0, sx.buffer, &code, &msg, |
447d236c | 3423 | &pass_message); |
d093f8e5 | 3424 | if (!sx.send_quit) |
0756eb3c | 3425 | { |
c562fd30 JH |
3426 | DEBUG(D_transport) debug_printf("H=%s [%s] %s\n", |
3427 | host->name, host->address, msg); | |
0756eb3c PH |
3428 | } |
3429 | } | |
0756eb3c PH |
3430 | |
3431 | /* Either RSET was not needed, or it succeeded */ | |
3432 | ||
d093f8e5 | 3433 | if (sx.ok) |
0756eb3c | 3434 | { |
875512a3 JH |
3435 | int pfd[2]; |
3436 | int socket_fd = sx.inblock.sock; | |
3437 | ||
3438 | ||
3439 | if (sx.first_addr != NULL) /* More addresses still to be sent */ | |
0756eb3c PH |
3440 | { /* in this run of the transport */ |
3441 | continue_sequence++; /* Causes * in logging */ | |
3442 | goto SEND_MESSAGE; | |
3443 | } | |
0756eb3c | 3444 | |
b7d3afcf JH |
3445 | /* Unless caller said it already has more messages listed for this host, |
3446 | pass the connection on to a new Exim process (below, the call to | |
3447 | transport_pass_socket). If the caller has more ready, just return with | |
3448 | the connection still open. */ | |
3449 | ||
a7538db1 | 3450 | #ifdef SUPPORT_TLS |
817d9f57 | 3451 | if (tls_out.active >= 0) |
b7d3afcf JH |
3452 | if ( continue_more |
3453 | || verify_check_given_host(&sx.ob->hosts_noproxy_tls, host) == OK) | |
875512a3 | 3454 | { |
b7d3afcf JH |
3455 | /* Before passing the socket on, or returning to caller with it still |
3456 | open, we must shut down TLS. Not all MTAs allow for the continuation | |
3457 | of the SMTP session when TLS is shut down. We test for this by sending | |
3458 | a new EHLO. If we don't get a good response, we don't attempt to pass | |
3459 | the socket on. */ | |
875512a3 JH |
3460 | |
3461 | tls_close(FALSE, TRUE); | |
3462 | smtp_peer_options = smtp_peer_options_wrap; | |
3463 | sx.ok = !sx.smtps | |
4e910c01 | 3464 | && smtp_write_command(&sx.outblock, SCMD_FLUSH, |
875512a3 JH |
3465 | "EHLO %s\r\n", sx.helo_data) >= 0 |
3466 | && smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), | |
3467 | '2', sx.ob->command_timeout); | |
b7d3afcf JH |
3468 | |
3469 | if (sx.ok && continue_more) | |
3470 | return yield; /* More addresses for another run */ | |
875512a3 JH |
3471 | } |
3472 | else | |
3473 | { | |
3474 | /* Set up a pipe for proxying TLS for the new transport process */ | |
3475 | ||
14de8063 | 3476 | smtp_peer_options |= OPTION_TLS; |
fa18eebc | 3477 | if (sx.ok = (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) == 0)) |
875512a3 JH |
3478 | socket_fd = pfd[1]; |
3479 | else | |
3480 | set_errno(sx.first_addr, errno, US"internal allocation problem", | |
3481 | DEFER, FALSE, host | |
3482 | # ifdef EXPERIMENTAL_DSN_INFO | |
3483 | , sx.smtp_greeting, sx.helo_response | |
3484 | # endif | |
3485 | ); | |
3486 | } | |
b7d3afcf | 3487 | else |
a7538db1 | 3488 | #endif |
b7d3afcf JH |
3489 | if (continue_more) |
3490 | return yield; /* More addresses for another run */ | |
0756eb3c | 3491 | |
4c04137d | 3492 | /* If the socket is successfully passed, we mustn't send QUIT (or |
0756eb3c PH |
3493 | indeed anything!) from here. */ |
3494 | ||
895fbaf2 JH |
3495 | /*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to |
3496 | propagate it from the initial | |
3497 | */ | |
d093f8e5 | 3498 | if (sx.ok && transport_pass_socket(tblock->name, host->name, |
875512a3 JH |
3499 | host->address, new_message_id, socket_fd)) |
3500 | { | |
d093f8e5 | 3501 | sx.send_quit = FALSE; |
875512a3 | 3502 | |
d097cc73 JH |
3503 | /* We have passed the client socket to a fresh transport process. |
3504 | If TLS is still active, we need to proxy it for the transport we | |
875512a3 JH |
3505 | just passed the baton to. Fork a child to to do it, and return to |
3506 | get logging done asap. Which way to place the work makes assumptions | |
3507 | about post-fork prioritisation which may not hold on all platforms. */ | |
57cc2785 | 3508 | #ifdef SUPPORT_TLS |
875512a3 JH |
3509 | if (tls_out.active >= 0) |
3510 | { | |
3511 | int pid = fork(); | |
d097cc73 | 3512 | if (pid == 0) /* child; fork again to disconnect totally */ |
626810b9 JH |
3513 | { |
3514 | if (running_in_test_harness) millisleep(100); /* let parent debug out */ | |
d097cc73 JH |
3515 | /* does not return */ |
3516 | smtp_proxy_tls(sx.buffer, sizeof(sx.buffer), pfd, | |
3517 | sx.ob->command_timeout); | |
626810b9 | 3518 | } |
d097cc73 | 3519 | |
875512a3 JH |
3520 | if (pid > 0) /* parent */ |
3521 | { | |
b7d3afcf | 3522 | DEBUG(D_transport) debug_printf("proxy-proc inter-pid %d\n", pid); |
e47252f5 | 3523 | close(pfd[0]); |
d097cc73 | 3524 | /* tidy the inter-proc to disconn the proxy proc */ |
60272099 | 3525 | waitpid(pid, NULL, 0); |
875512a3 JH |
3526 | tls_close(FALSE, FALSE); |
3527 | (void)close(sx.inblock.sock); | |
3528 | continue_transport = NULL; | |
3529 | continue_hostname = NULL; | |
3530 | return yield; | |
3531 | } | |
d097cc73 | 3532 | log_write(0, LOG_PANIC_DIE, "fork failed"); |
875512a3 | 3533 | } |
57cc2785 | 3534 | #endif |
875512a3 | 3535 | } |
0756eb3c PH |
3536 | } |
3537 | ||
3538 | /* If RSET failed and there are addresses left, they get deferred. */ | |
875512a3 JH |
3539 | else |
3540 | set_errno(sx.first_addr, errno, msg, DEFER, FALSE, host | |
895fbaf2 | 3541 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 3542 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3543 | #endif |
3544 | ); | |
0756eb3c PH |
3545 | } |
3546 | } | |
3547 | ||
3548 | /* End off tidily with QUIT unless the connection has died or the socket has | |
3549 | been passed to another process. There has been discussion on the net about what | |
3550 | to do after sending QUIT. The wording of the RFC suggests that it is necessary | |
3551 | to wait for a response, but on the other hand, there isn't anything one can do | |
3552 | with an error response, other than log it. Exim used to do that. However, | |
3553 | further discussion suggested that it is positively advantageous not to wait for | |
3554 | the response, but to close the session immediately. This is supposed to move | |
3555 | the TCP/IP TIME_WAIT state from the server to the client, thereby removing some | |
3556 | load from the server. (Hosts that are both servers and clients may not see much | |
3557 | difference, of course.) Further discussion indicated that this was safe to do | |
3558 | on Unix systems which have decent implementations of TCP/IP that leave the | |
3559 | connection around for a while (TIME_WAIT) after the application has gone away. | |
3560 | This enables the response sent by the server to be properly ACKed rather than | |
3561 | timed out, as can happen on broken TCP/IP implementations on other OS. | |
3562 | ||
3563 | This change is being made on 31-Jul-98. After over a year of trouble-free | |
3564 | operation, the old commented-out code was removed on 17-Sep-99. */ | |
3565 | ||
3566 | SEND_QUIT: | |
4e910c01 | 3567 | if (sx.send_quit) (void)smtp_write_command(&sx.outblock, SCMD_FLUSH, "QUIT\r\n"); |
0756eb3c PH |
3568 | |
3569 | END_OFF: | |
3570 | ||
3571 | #ifdef SUPPORT_TLS | |
817d9f57 | 3572 | tls_close(FALSE, TRUE); |
0756eb3c PH |
3573 | #endif |
3574 | ||
3575 | /* Close the socket, and return the appropriate value, first setting | |
0756eb3c PH |
3576 | works because the NULL setting is passed back to the calling process, and |
3577 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
3578 | ||
3579 | If all went well and continue_more is set, we shouldn't actually get here if | |
3580 | there are further addresses, as the return above will be taken. However, | |
3581 | writing RSET might have failed, or there may be other addresses whose hosts are | |
3582 | specified in the transports, and therefore not visible at top level, in which | |
3583 | case continue_more won't get set. */ | |
3584 | ||
e1d04f48 | 3585 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
d093f8e5 | 3586 | if (sx.send_quit) |
60d10ce7 | 3587 | { |
d093f8e5 JH |
3588 | shutdown(sx.outblock.sock, SHUT_WR); |
3589 | if (fcntl(sx.inblock.sock, F_SETFL, O_NONBLOCK) == 0) | |
3590 | for (rc = 16; read(sx.inblock.sock, sx.inbuffer, sizeof(sx.inbuffer)) > 0 && rc > 0;) | |
5ddc9771 | 3591 | rc--; /* drain socket */ |
60d10ce7 | 3592 | } |
d093f8e5 | 3593 | (void)close(sx.inblock.sock); |
a7538db1 | 3594 | |
0cbf2b82 | 3595 | #ifndef DISABLE_EVENT |
774ef2d7 | 3596 | (void) event_raise(tblock->event_action, US"tcp:close", NULL); |
a7538db1 JH |
3597 | #endif |
3598 | ||
0756eb3c PH |
3599 | continue_transport = NULL; |
3600 | continue_hostname = NULL; | |
3601 | return yield; | |
3602 | } | |
3603 | ||
3604 | ||
3605 | ||
3606 | ||
3607 | /************************************************* | |
3608 | * Closedown entry point * | |
3609 | *************************************************/ | |
3610 | ||
3611 | /* This function is called when exim is passed an open smtp channel | |
3612 | from another incarnation, but the message which it has been asked | |
3613 | to deliver no longer exists. The channel is on stdin. | |
3614 | ||
3615 | We might do fancy things like looking for another message to send down | |
3616 | the channel, but if the one we sought has gone, it has probably been | |
3617 | delivered by some other process that itself will seek further messages, | |
3618 | so just close down our connection. | |
3619 | ||
3620 | Argument: pointer to the transport instance block | |
3621 | Returns: nothing | |
3622 | */ | |
3623 | ||
3624 | void | |
3625 | smtp_transport_closedown(transport_instance *tblock) | |
3626 | { | |
3627 | smtp_transport_options_block *ob = | |
02b41d71 | 3628 | (smtp_transport_options_block *)tblock->options_block; |
0756eb3c PH |
3629 | smtp_inblock inblock; |
3630 | smtp_outblock outblock; | |
3631 | uschar buffer[256]; | |
3632 | uschar inbuffer[4096]; | |
3633 | uschar outbuffer[16]; | |
3634 | ||
3635 | inblock.sock = fileno(stdin); | |
3636 | inblock.buffer = inbuffer; | |
3637 | inblock.buffersize = sizeof(inbuffer); | |
3638 | inblock.ptr = inbuffer; | |
3639 | inblock.ptrend = inbuffer; | |
3640 | ||
3641 | outblock.sock = inblock.sock; | |
3642 | outblock.buffersize = sizeof(outbuffer); | |
3643 | outblock.buffer = outbuffer; | |
3644 | outblock.ptr = outbuffer; | |
3645 | outblock.cmd_count = 0; | |
3646 | outblock.authenticating = FALSE; | |
3647 | ||
4e910c01 | 3648 | (void)smtp_write_command(&outblock, SCMD_FLUSH, "QUIT\r\n"); |
0756eb3c PH |
3649 | (void)smtp_read_response(&inblock, buffer, sizeof(buffer), '2', |
3650 | ob->command_timeout); | |
f1e894f3 | 3651 | (void)close(inblock.sock); |
0756eb3c PH |
3652 | } |
3653 | ||
3654 | ||
3655 | ||
3656 | /************************************************* | |
3657 | * Prepare addresses for delivery * | |
3658 | *************************************************/ | |
3659 | ||
3660 | /* This function is called to flush out error settings from previous delivery | |
3661 | attempts to other hosts. It also records whether we got here via an MX record | |
3662 | or not in the more_errno field of the address. We are interested only in | |
3663 | addresses that are still marked DEFER - others may have got delivered to a | |
3664 | previously considered IP address. Set their status to PENDING_DEFER to indicate | |
3665 | which ones are relevant this time. | |
3666 | ||
3667 | Arguments: | |
3668 | addrlist the list of addresses | |
3669 | host the host we are delivering to | |
3670 | ||
3671 | Returns: the first address for this delivery | |
3672 | */ | |
3673 | ||
3674 | static address_item * | |
3675 | prepare_addresses(address_item *addrlist, host_item *host) | |
3676 | { | |
3677 | address_item *first_addr = NULL; | |
3678 | address_item *addr; | |
7b4c8c1f | 3679 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b JH |
3680 | if (addr->transport_return == DEFER) |
3681 | { | |
7b4c8c1f | 3682 | if (!first_addr) first_addr = addr; |
168dec3b JH |
3683 | addr->transport_return = PENDING_DEFER; |
3684 | addr->basic_errno = 0; | |
3685 | addr->more_errno = (host->mx >= 0)? 'M' : 'A'; | |
3686 | addr->message = NULL; | |
a7538db1 | 3687 | #ifdef SUPPORT_TLS |
168dec3b JH |
3688 | addr->cipher = NULL; |
3689 | addr->ourcert = NULL; | |
3690 | addr->peercert = NULL; | |
3691 | addr->peerdn = NULL; | |
3692 | addr->ocsp = OCSP_NOT_REQ; | |
895fbaf2 JH |
3693 | #endif |
3694 | #ifdef EXPERIMENTAL_DSN_INFO | |
3695 | addr->smtp_greeting = NULL; | |
3696 | addr->helo_response = NULL; | |
a7538db1 | 3697 | #endif |
168dec3b | 3698 | } |
0756eb3c PH |
3699 | return first_addr; |
3700 | } | |
3701 | ||
3702 | ||
3703 | ||
3704 | /************************************************* | |
3705 | * Main entry point * | |
3706 | *************************************************/ | |
3707 | ||
3708 | /* See local README for interface details. As this is a remote transport, it is | |
3709 | given a chain of addresses to be delivered in one connection, if possible. It | |
3710 | always returns TRUE, indicating that each address has its own independent | |
3711 | status set, except if there is a setting up problem, in which case it returns | |
3712 | FALSE. */ | |
3713 | ||
3714 | BOOL | |
3715 | smtp_transport_entry( | |
3716 | transport_instance *tblock, /* data for this instantiation */ | |
3717 | address_item *addrlist) /* addresses we are working on */ | |
3718 | { | |
3719 | int cutoff_retry; | |
a843a57e | 3720 | int defport; |
0756eb3c PH |
3721 | int hosts_defer = 0; |
3722 | int hosts_fail = 0; | |
3723 | int hosts_looked_up = 0; | |
3724 | int hosts_retry = 0; | |
3725 | int hosts_serial = 0; | |
3726 | int hosts_total = 0; | |
8e669ac1 | 3727 | int total_hosts_tried = 0; |
0756eb3c PH |
3728 | address_item *addr; |
3729 | BOOL expired = TRUE; | |
0756eb3c PH |
3730 | uschar *expanded_hosts = NULL; |
3731 | uschar *pistring; | |
3732 | uschar *tid = string_sprintf("%s transport", tblock->name); | |
3733 | smtp_transport_options_block *ob = | |
3734 | (smtp_transport_options_block *)(tblock->options_block); | |
3735 | host_item *hostlist = addrlist->host_list; | |
f8ea1886 | 3736 | host_item *host; |
0756eb3c PH |
3737 | |
3738 | DEBUG(D_transport) | |
3739 | { | |
3740 | debug_printf("%s transport entered\n", tblock->name); | |
7b4c8c1f | 3741 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c | 3742 | debug_printf(" %s\n", addr->address); |
7b4c8c1f JH |
3743 | if (hostlist) |
3744 | { | |
3745 | debug_printf("hostlist:\n"); | |
3746 | for (host = hostlist; host; host = host->next) | |
f8ea1886 | 3747 | debug_printf(" '%s' IP %s port %d\n", host->name, host->address, host->port); |
7b4c8c1f | 3748 | } |
57cc2785 JH |
3749 | if (continue_hostname) |
3750 | debug_printf("already connected to %s [%s] (on fd %d)\n", | |
3751 | continue_hostname, continue_host_address, | |
3752 | cutthrough.fd >= 0 ? cutthrough.fd : 0); | |
0756eb3c PH |
3753 | } |
3754 | ||
f6c332bd PH |
3755 | /* Set the flag requesting that these hosts be added to the waiting |
3756 | database if the delivery fails temporarily or if we are running with | |
3757 | queue_smtp or a 2-stage queue run. This gets unset for certain | |
3758 | kinds of error, typically those that are specific to the message. */ | |
3759 | ||
3760 | update_waiting = TRUE; | |
3761 | ||
0756eb3c PH |
3762 | /* If a host list is not defined for the addresses - they must all have the |
3763 | same one in order to be passed to a single transport - or if the transport has | |
3764 | a host list with hosts_override set, use the host list supplied with the | |
3765 | transport. It is an error for this not to exist. */ | |
3766 | ||
7b4c8c1f | 3767 | if (!hostlist || (ob->hosts_override && ob->hosts)) |
0756eb3c | 3768 | { |
7b4c8c1f | 3769 | if (!ob->hosts) |
0756eb3c PH |
3770 | { |
3771 | addrlist->message = string_sprintf("%s transport called with no hosts set", | |
3772 | tblock->name); | |
3773 | addrlist->transport_return = PANIC; | |
3774 | return FALSE; /* Only top address has status */ | |
3775 | } | |
3776 | ||
3777 | DEBUG(D_transport) debug_printf("using the transport's hosts: %s\n", | |
3778 | ob->hosts); | |
3779 | ||
3780 | /* If the transport's host list contains no '$' characters, and we are not | |
3781 | randomizing, it is fixed and therefore a chain of hosts can be built once | |
3782 | and for all, and remembered for subsequent use by other calls to this | |
3783 | transport. If, on the other hand, the host list does contain '$', or we are | |
3784 | randomizing its order, we have to rebuild it each time. In the fixed case, | |
3785 | as the hosts string will never be used again, it doesn't matter that we | |
3786 | replace all the : characters with zeros. */ | |
3787 | ||
7b4c8c1f | 3788 | if (!ob->hostlist) |
0756eb3c PH |
3789 | { |
3790 | uschar *s = ob->hosts; | |
3791 | ||
3792 | if (Ustrchr(s, '$') != NULL) | |
3793 | { | |
d427a7f9 | 3794 | if (!(expanded_hosts = expand_string(s))) |
0756eb3c PH |
3795 | { |
3796 | addrlist->message = string_sprintf("failed to expand list of hosts " | |
3797 | "\"%s\" in %s transport: %s", s, tblock->name, expand_string_message); | |
7b4c8c1f | 3798 | addrlist->transport_return = search_find_defer ? DEFER : PANIC; |
0756eb3c PH |
3799 | return FALSE; /* Only top address has status */ |
3800 | } | |
3801 | DEBUG(D_transport) debug_printf("expanded list of hosts \"%s\" to " | |
3802 | "\"%s\"\n", s, expanded_hosts); | |
3803 | s = expanded_hosts; | |
3804 | } | |
3805 | else | |
3806 | if (ob->hosts_randomize) s = expanded_hosts = string_copy(s); | |
3807 | ||
3808 | host_build_hostlist(&hostlist, s, ob->hosts_randomize); | |
3809 | ||
e276e04b | 3810 | /* Check that the expansion yielded something useful. */ |
7b4c8c1f | 3811 | if (!hostlist) |
e276e04b TF |
3812 | { |
3813 | addrlist->message = | |
3814 | string_sprintf("%s transport has empty hosts setting", tblock->name); | |
3815 | addrlist->transport_return = PANIC; | |
3816 | return FALSE; /* Only top address has status */ | |
3817 | } | |
3818 | ||
0756eb3c PH |
3819 | /* If there was no expansion of hosts, save the host list for |
3820 | next time. */ | |
3821 | ||
d427a7f9 | 3822 | if (!expanded_hosts) ob->hostlist = hostlist; |
0756eb3c PH |
3823 | } |
3824 | ||
3825 | /* This is not the first time this transport has been run in this delivery; | |
3826 | the host list was built previously. */ | |
3827 | ||
55414b25 JH |
3828 | else |
3829 | hostlist = ob->hostlist; | |
0756eb3c PH |
3830 | } |
3831 | ||
3832 | /* The host list was supplied with the address. If hosts_randomize is set, we | |
3833 | must sort it into a random order if it did not come from MX records and has not | |
3834 | already been randomized (but don't bother if continuing down an existing | |
3835 | connection). */ | |
3836 | ||
7b4c8c1f | 3837 | else if (ob->hosts_randomize && hostlist->mx == MX_NONE && !continue_hostname) |
0756eb3c PH |
3838 | { |
3839 | host_item *newlist = NULL; | |
7b4c8c1f | 3840 | while (hostlist) |
0756eb3c PH |
3841 | { |
3842 | host_item *h = hostlist; | |
3843 | hostlist = hostlist->next; | |
3844 | ||
3845 | h->sort_key = random_number(100); | |
3846 | ||
7b4c8c1f | 3847 | if (!newlist) |
0756eb3c PH |
3848 | { |
3849 | h->next = NULL; | |
3850 | newlist = h; | |
3851 | } | |
3852 | else if (h->sort_key < newlist->sort_key) | |
3853 | { | |
3854 | h->next = newlist; | |
3855 | newlist = h; | |
3856 | } | |
3857 | else | |
3858 | { | |
3859 | host_item *hh = newlist; | |
7b4c8c1f | 3860 | while (hh->next) |
0756eb3c PH |
3861 | { |
3862 | if (h->sort_key < hh->next->sort_key) break; | |
3863 | hh = hh->next; | |
3864 | } | |
3865 | h->next = hh->next; | |
3866 | hh->next = h; | |
3867 | } | |
3868 | } | |
3869 | ||
3870 | hostlist = addrlist->host_list = newlist; | |
3871 | } | |
3872 | ||
2d280592 | 3873 | /* Sort out the default port. */ |
0756eb3c | 3874 | |
a843a57e | 3875 | if (!smtp_get_port(ob->port, addrlist, &defport, tid)) return FALSE; |
0756eb3c | 3876 | |
0756eb3c PH |
3877 | /* For each host-plus-IP-address on the list: |
3878 | ||
3879 | . If this is a continued delivery and the host isn't the one with the | |
3880 | current connection, skip. | |
3881 | ||
3882 | . If the status is unusable (i.e. previously failed or retry checked), skip. | |
3883 | ||
3884 | . If no IP address set, get the address, either by turning the name into | |
3885 | an address, calling gethostbyname if gethostbyname is on, or by calling | |
3886 | the DNS. The DNS may yield multiple addresses, in which case insert the | |
3887 | extra ones into the list. | |
3888 | ||
3889 | . Get the retry data if not previously obtained for this address and set the | |
3890 | field which remembers the state of this address. Skip if the retry time is | |
3891 | not reached. If not, remember whether retry data was found. The retry string | |
3892 | contains both the name and the IP address. | |
3893 | ||
3894 | . Scan the list of addresses and mark those whose status is DEFER as | |
3895 | PENDING_DEFER. These are the only ones that will be processed in this cycle | |
3896 | of the hosts loop. | |
3897 | ||
3898 | . Make a delivery attempt - addresses marked PENDING_DEFER will be tried. | |
3899 | Some addresses may be successfully delivered, others may fail, and yet | |
3900 | others may get temporary errors and so get marked DEFER. | |
3901 | ||
3902 | . The return from the delivery attempt is OK if a connection was made and a | |
3903 | valid SMTP dialogue was completed. Otherwise it is DEFER. | |
3904 | ||
3905 | . If OK, add a "remove" retry item for this host/IPaddress, if any. | |
3906 | ||
3907 | . If fail to connect, or other defer state, add a retry item. | |
3908 | ||
3909 | . If there are any addresses whose status is still DEFER, carry on to the | |
3910 | next host/IPaddress, unless we have tried the number of hosts given | |
533244af | 3911 | by hosts_max_try or hosts_max_try_hardlimit; otherwise return. Note that |
8e669ac1 PH |
3912 | there is some fancy logic for hosts_max_try that means its limit can be |
3913 | overstepped in some circumstances. | |
0756eb3c PH |
3914 | |
3915 | If we get to the end of the list, all hosts have deferred at least one address, | |
3916 | or not reached their retry times. If delay_after_cutoff is unset, it requests a | |
3917 | delivery attempt to those hosts whose last try was before the arrival time of | |
3918 | the current message. To cope with this, we have to go round the loop a second | |
3919 | time. After that, set the status and error data for any addresses that haven't | |
3920 | had it set already. */ | |
3921 | ||
7b4c8c1f JH |
3922 | for (cutoff_retry = 0; |
3923 | expired && cutoff_retry < (ob->delay_after_cutoff ? 1 : 2); | |
0756eb3c PH |
3924 | cutoff_retry++) |
3925 | { | |
3926 | host_item *nexthost = NULL; | |
3927 | int unexpired_hosts_tried = 0; | |
2577f55f | 3928 | BOOL continue_host_tried = FALSE; |
0756eb3c | 3929 | |
2577f55f | 3930 | retry_non_continued: |
0756eb3c | 3931 | for (host = hostlist; |
7b4c8c1f JH |
3932 | host |
3933 | && unexpired_hosts_tried < ob->hosts_max_try | |
3934 | && total_hosts_tried < ob->hosts_max_try_hardlimit; | |
0756eb3c PH |
3935 | host = nexthost) |
3936 | { | |
3937 | int rc; | |
3938 | int host_af; | |
3939 | uschar *rs; | |
0756eb3c PH |
3940 | BOOL host_is_expired = FALSE; |
3941 | BOOL message_defer = FALSE; | |
0756eb3c PH |
3942 | BOOL some_deferred = FALSE; |
3943 | address_item *first_addr = NULL; | |
3944 | uschar *interface = NULL; | |
3945 | uschar *retry_host_key = NULL; | |
3946 | uschar *retry_message_key = NULL; | |
3947 | uschar *serialize_key = NULL; | |
3948 | ||
9c4e8f60 PH |
3949 | /* Default next host is next host. :-) But this can vary if the |
3950 | hosts_max_try limit is hit (see below). It may also be reset if a host | |
3951 | address is looked up here (in case the host was multihomed). */ | |
3952 | ||
3953 | nexthost = host->next; | |
3954 | ||
0756eb3c PH |
3955 | /* If the address hasn't yet been obtained from the host name, look it up |
3956 | now, unless the host is already marked as unusable. If it is marked as | |
3957 | unusable, it means that the router was unable to find its IP address (in | |
3958 | the DNS or wherever) OR we are in the 2nd time round the cutoff loop, and | |
3959 | the lookup failed last time. We don't get this far if *all* MX records | |
3960 | point to non-existent hosts; that is treated as a hard error. | |
3961 | ||
3962 | We can just skip this host entirely. When the hosts came from the router, | |
3963 | the address will timeout based on the other host(s); when the address is | |
3964 | looked up below, there is an explicit retry record added. | |
3965 | ||
3966 | Note that we mustn't skip unusable hosts if the address is not unset; they | |
3967 | may be needed as expired hosts on the 2nd time round the cutoff loop. */ | |
3968 | ||
7b4c8c1f | 3969 | if (!host->address) |
0756eb3c | 3970 | { |
322050c2 | 3971 | int new_port, flags; |
7cd1141b | 3972 | host_item *hh; |
0756eb3c PH |
3973 | |
3974 | if (host->status >= hstatus_unusable) | |
3975 | { | |
3976 | DEBUG(D_transport) debug_printf("%s has no address and is unusable - skipping\n", | |
3977 | host->name); | |
3978 | continue; | |
3979 | } | |
3980 | ||
3981 | DEBUG(D_transport) debug_printf("getting address for %s\n", host->name); | |
3982 | ||
7cd1141b PH |
3983 | /* The host name is permitted to have an attached port. Find it, and |
3984 | strip it from the name. Just remember it for now. */ | |
3985 | ||
3986 | new_port = host_item_get_port(host); | |
3987 | ||
3988 | /* Count hosts looked up */ | |
3989 | ||
0756eb3c PH |
3990 | hosts_looked_up++; |
3991 | ||
3992 | /* Find by name if so configured, or if it's an IP address. We don't | |
3993 | just copy the IP address, because we need the test-for-local to happen. */ | |
3994 | ||
66387a73 | 3995 | flags = HOST_FIND_BY_A | HOST_FIND_BY_AAAA; |
322050c2 PH |
3996 | if (ob->dns_qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE; |
3997 | if (ob->dns_search_parents) flags |= HOST_FIND_SEARCH_PARENTS; | |
3998 | ||
7e66e54d | 3999 | if (ob->gethostbyname || string_is_ip_address(host->name, NULL) != 0) |
55414b25 | 4000 | rc = host_find_byname(host, NULL, flags, NULL, TRUE); |
0756eb3c | 4001 | else |
0756eb3c | 4002 | rc = host_find_bydns(host, NULL, flags, NULL, NULL, NULL, |
7cd171b7 | 4003 | &ob->dnssec, /* domains for request/require */ |
55414b25 | 4004 | NULL, NULL); |
0756eb3c | 4005 | |
7cd1141b PH |
4006 | /* Update the host (and any additional blocks, resulting from |
4007 | multihoming) with a host-specific port, if any. */ | |
4008 | ||
4009 | for (hh = host; hh != nexthost; hh = hh->next) hh->port = new_port; | |
4010 | ||
0756eb3c PH |
4011 | /* Failure to find the host at this time (usually DNS temporary failure) |
4012 | is really a kind of routing failure rather than a transport failure. | |
4013 | Therefore we add a retry item of the routing kind, not to stop us trying | |
4014 | to look this name up here again, but to ensure the address gets timed | |
4015 | out if the failures go on long enough. A complete failure at this point | |
4016 | commonly points to a configuration error, but the best action is still | |
4017 | to carry on for the next host. */ | |
4018 | ||
2546388c | 4019 | if (rc == HOST_FIND_AGAIN || rc == HOST_FIND_SECURITY || rc == HOST_FIND_FAILED) |
0756eb3c PH |
4020 | { |
4021 | retry_add_item(addrlist, string_sprintf("R:%s", host->name), 0); | |
4022 | expired = FALSE; | |
4023 | if (rc == HOST_FIND_AGAIN) hosts_defer++; else hosts_fail++; | |
4024 | DEBUG(D_transport) debug_printf("rc = %s for %s\n", (rc == HOST_FIND_AGAIN)? | |
4025 | "HOST_FIND_AGAIN" : "HOST_FIND_FAILED", host->name); | |
4026 | host->status = hstatus_unusable; | |
4027 | ||
7b4c8c1f | 4028 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4029 | { |
4030 | if (addr->transport_return != DEFER) continue; | |
4031 | addr->basic_errno = ERRNO_UNKNOWNHOST; | |
2546388c JH |
4032 | addr->message = string_sprintf( |
4033 | rc == HOST_FIND_SECURITY | |
4034 | ? "lookup of IP address for %s was insecure" | |
4035 | : "failed to lookup IP address for %s", | |
4036 | host->name); | |
0756eb3c PH |
4037 | } |
4038 | continue; | |
4039 | } | |
4040 | ||
4041 | /* If the host is actually the local host, we may have a problem, or | |
4042 | there may be some cunning configuration going on. In the problem case, | |
4043 | log things and give up. The default transport status is already DEFER. */ | |
4044 | ||
4045 | if (rc == HOST_FOUND_LOCAL && !ob->allow_localhost) | |
4046 | { | |
7b4c8c1f | 4047 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4048 | { |
4049 | addr->basic_errno = 0; | |
4050 | addr->message = string_sprintf("%s transport found host %s to be " | |
4051 | "local", tblock->name, host->name); | |
4052 | } | |
4053 | goto END_TRANSPORT; | |
4054 | } | |
4055 | } /* End of block for IP address lookup */ | |
4056 | ||
4057 | /* If this is a continued delivery, we are interested only in the host | |
4058 | which matches the name of the existing open channel. The check is put | |
4059 | here after the local host lookup, in case the name gets expanded as a | |
4060 | result of the lookup. Set expired FALSE, to save the outer loop executing | |
4061 | twice. */ | |
4062 | ||
2577f55f JH |
4063 | if (continue_hostname) |
4064 | if ( Ustrcmp(continue_hostname, host->name) != 0 | |
4065 | || Ustrcmp(continue_host_address, host->address) != 0 | |
4066 | ) | |
4067 | { | |
4068 | expired = FALSE; | |
4069 | continue; /* With next host */ | |
4070 | } | |
4071 | else | |
4072 | continue_host_tried = TRUE; | |
0756eb3c | 4073 | |
9c4e8f60 PH |
4074 | /* Reset the default next host in case a multihomed host whose addresses |
4075 | are not looked up till just above added to the host list. */ | |
83364d30 PH |
4076 | |
4077 | nexthost = host->next; | |
4078 | ||
0756eb3c PH |
4079 | /* If queue_smtp is set (-odqs or the first part of a 2-stage run), or the |
4080 | domain is in queue_smtp_domains, we don't actually want to attempt any | |
4081 | deliveries. When doing a queue run, queue_smtp_domains is always unset. If | |
4082 | there is a lookup defer in queue_smtp_domains, proceed as if the domain | |
4083 | were not in it. We don't want to hold up all SMTP deliveries! Except when | |
4084 | doing a two-stage queue run, don't do this if forcing. */ | |
4085 | ||
4086 | if ((!deliver_force || queue_2stage) && (queue_smtp || | |
55414b25 JH |
4087 | match_isinlist(addrlist->domain, |
4088 | (const uschar **)&queue_smtp_domains, 0, | |
cf39cf57 | 4089 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)) |
0756eb3c PH |
4090 | { |
4091 | expired = FALSE; | |
7b4c8c1f JH |
4092 | for (addr = addrlist; addr; addr = addr->next) |
4093 | if (addr->transport_return == DEFER) | |
4094 | addr->message = US"domain matches queue_smtp_domains, or -odqs set"; | |
0756eb3c PH |
4095 | continue; /* With next host */ |
4096 | } | |
4097 | ||
4098 | /* Count hosts being considered - purely for an intelligent comment | |
4099 | if none are usable. */ | |
4100 | ||
4101 | hosts_total++; | |
4102 | ||
4103 | /* Set $host and $host address now in case they are needed for the | |
4104 | interface expansion or the serialize_hosts check; they remain set if an | |
4105 | actual delivery happens. */ | |
4106 | ||
4107 | deliver_host = host->name; | |
4108 | deliver_host_address = host->address; | |
783b385f JH |
4109 | lookup_dnssec_authenticated = host->dnssec == DS_YES ? US"yes" |
4110 | : host->dnssec == DS_NO ? US"no" | |
4111 | : US""; | |
0756eb3c | 4112 | |
7cd1141b PH |
4113 | /* Set up a string for adding to the retry key if the port number is not |
4114 | the standard SMTP port. A host may have its own port setting that overrides | |
4115 | the default. */ | |
4116 | ||
7b4c8c1f | 4117 | pistring = string_sprintf(":%d", host->port == PORT_NONE |
a843a57e | 4118 | ? defport : host->port); |
7cd1141b PH |
4119 | if (Ustrcmp(pistring, ":25") == 0) pistring = US""; |
4120 | ||
0756eb3c | 4121 | /* Select IPv4 or IPv6, and choose an outgoing interface. If the interface |
6f6dedcc JH |
4122 | string is set, even if constant (as different transports can have different |
4123 | constant settings), we must add it to the key that is used for retries, | |
4124 | because connections to the same host from a different interface should be | |
4125 | treated separately. */ | |
0756eb3c | 4126 | |
7b4c8c1f | 4127 | host_af = Ustrchr(host->address, ':') == NULL ? AF_INET : AF_INET6; |
6f6dedcc JH |
4128 | if ((rs = ob->interface) && *rs) |
4129 | { | |
4130 | if (!smtp_get_interface(rs, host_af, addrlist, &interface, tid)) | |
4131 | return FALSE; | |
4132 | pistring = string_sprintf("%s/%s", pistring, interface); | |
4133 | } | |
0756eb3c PH |
4134 | |
4135 | /* The first time round the outer loop, check the status of the host by | |
4136 | inspecting the retry data. The second time round, we are interested only | |
4137 | in expired hosts that haven't been tried since this message arrived. */ | |
4138 | ||
4139 | if (cutoff_retry == 0) | |
4140 | { | |
9c695f6d | 4141 | BOOL incl_ip; |
0756eb3c | 4142 | /* Ensure the status of the address is set by checking retry data if |
9c695f6d | 4143 | necessary. There may be host-specific retry data (applicable to all |
0756eb3c PH |
4144 | messages) and also data for retries of a specific message at this host. |
4145 | If either of these retry records are actually read, the keys used are | |
4146 | returned to save recomputing them later. */ | |
4147 | ||
9c695f6d JH |
4148 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, |
4149 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4150 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4151 | continue; /* with next host */ | |
4152 | ||
0756eb3c | 4153 | host_is_expired = retry_check_address(addrlist->domain, host, pistring, |
9c695f6d | 4154 | incl_ip, &retry_host_key, &retry_message_key); |
0756eb3c | 4155 | |
875512a3 | 4156 | DEBUG(D_transport) debug_printf("%s [%s]%s retry-status = %s\n", host->name, |
0756eb3c PH |
4157 | (host->address == NULL)? US"" : host->address, pistring, |
4158 | (host->status == hstatus_usable)? "usable" : | |
4159 | (host->status == hstatus_unusable)? "unusable" : | |
4160 | (host->status == hstatus_unusable_expired)? "unusable (expired)" : "?"); | |
4161 | ||
4162 | /* Skip this address if not usable at this time, noting if it wasn't | |
4163 | actually expired, both locally and in the address. */ | |
4164 | ||
4165 | switch (host->status) | |
4166 | { | |
4167 | case hstatus_unusable: | |
7b4c8c1f JH |
4168 | expired = FALSE; |
4169 | setflag(addrlist, af_retry_skipped); | |
4170 | /* Fall through */ | |
0756eb3c PH |
4171 | |
4172 | case hstatus_unusable_expired: | |
7b4c8c1f JH |
4173 | switch (host->why) |
4174 | { | |
4175 | case hwhy_retry: hosts_retry++; break; | |
4176 | case hwhy_failed: hosts_fail++; break; | |
2546388c | 4177 | case hwhy_insecure: |
7b4c8c1f JH |
4178 | case hwhy_deferred: hosts_defer++; break; |
4179 | } | |
4180 | ||
4181 | /* If there was a retry message key, implying that previously there | |
4182 | was a message-specific defer, we don't want to update the list of | |
4183 | messages waiting for these hosts. */ | |
4184 | ||
4185 | if (retry_message_key) update_waiting = FALSE; | |
4186 | continue; /* With the next host or IP address */ | |
0756eb3c PH |
4187 | } |
4188 | } | |
4189 | ||
4190 | /* Second time round the loop: if the address is set but expired, and | |
4191 | the message is newer than the last try, let it through. */ | |
4192 | ||
4193 | else | |
4194 | { | |
7b4c8c1f JH |
4195 | if ( !host->address |
4196 | || host->status != hstatus_unusable_expired | |
32dfdf8b | 4197 | || host->last_try > received_time.tv_sec) |
0756eb3c | 4198 | continue; |
7b4c8c1f | 4199 | DEBUG(D_transport) debug_printf("trying expired host %s [%s]%s\n", |
0756eb3c PH |
4200 | host->name, host->address, pistring); |
4201 | host_is_expired = TRUE; | |
4202 | } | |
4203 | ||
4204 | /* Setting "expired=FALSE" doesn't actually mean not all hosts are expired; | |
4205 | it remains TRUE only if all hosts are expired and none are actually tried. | |
4206 | */ | |
4207 | ||
4208 | expired = FALSE; | |
4209 | ||
4210 | /* If this host is listed as one to which access must be serialized, | |
4211 | see if another Exim process has a connection to it, and if so, skip | |
4212 | this host. If not, update the database to record our connection to it | |
4213 | and remember this for later deletion. Do not do any of this if we are | |
4214 | sending the message down a pre-existing connection. */ | |
4215 | ||
7b4c8c1f JH |
4216 | if ( !continue_hostname |
4217 | && verify_check_given_host(&ob->serialize_hosts, host) == OK) | |
0756eb3c PH |
4218 | { |
4219 | serialize_key = string_sprintf("host-serialize-%s", host->name); | |
e8ae7214 | 4220 | if (!enq_start(serialize_key, 1)) |
0756eb3c PH |
4221 | { |
4222 | DEBUG(D_transport) | |
4223 | debug_printf("skipping host %s because another Exim process " | |
4224 | "is connected to it\n", host->name); | |
4225 | hosts_serial++; | |
4226 | continue; | |
4227 | } | |
0756eb3c PH |
4228 | } |
4229 | ||
4230 | /* OK, we have an IP address that is not waiting for its retry time to | |
4231 | arrive (it might be expired) OR (second time round the loop) we have an | |
4232 | expired host that hasn't been tried since the message arrived. Have a go | |
4233 | at delivering the message to it. First prepare the addresses by flushing | |
4234 | out the result of previous attempts, and finding the first address that | |
4235 | is still to be delivered. */ | |
4236 | ||
4237 | first_addr = prepare_addresses(addrlist, host); | |
4238 | ||
4239 | DEBUG(D_transport) debug_printf("delivering %s to %s [%s] (%s%s)\n", | |
4240 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4241 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
4242 | |
4243 | set_process_info("delivering %s to %s [%s] (%s%s)", | |
4244 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4245 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
4246 | |
4247 | /* This is not for real; don't do the delivery. If there are | |
4248 | any remaining hosts, list them. */ | |
4249 | ||
4250 | if (dont_deliver) | |
4251 | { | |
4252 | host_item *host2; | |
895fbaf2 | 4253 | set_errno_nohost(addrlist, 0, NULL, OK, FALSE); |
7b4c8c1f | 4254 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4255 | { |
4256 | addr->host_used = host; | |
4257 | addr->special_action = '*'; | |
4258 | addr->message = US"delivery bypassed by -N option"; | |
4259 | } | |
4260 | DEBUG(D_transport) | |
4261 | { | |
4262 | debug_printf("*** delivery by %s transport bypassed by -N option\n" | |
4263 | "*** host and remaining hosts:\n", tblock->name); | |
7b4c8c1f | 4264 | for (host2 = host; host2; host2 = host2->next) |
0756eb3c | 4265 | debug_printf(" %s [%s]\n", host2->name, |
7b4c8c1f | 4266 | host2->address ? host2->address : US"unset"); |
0756eb3c PH |
4267 | } |
4268 | rc = OK; | |
4269 | } | |
4270 | ||
4271 | /* This is for real. If the host is expired, we don't count it for | |
4272 | hosts_max_retry. This ensures that all hosts must expire before an address | |
8e669ac1 | 4273 | is timed out, unless hosts_max_try_hardlimit (which protects against |
533244af | 4274 | lunatic DNS configurations) is reached. |
8e669ac1 | 4275 | |
533244af PH |
4276 | If the host is not expired and we are about to hit the hosts_max_retry |
4277 | limit, check to see if there is a subsequent hosts with a different MX | |
4278 | value. If so, make that the next host, and don't count this one. This is a | |
4279 | heuristic to make sure that different MXs do get tried. With a normal kind | |
4280 | of retry rule, they would get tried anyway when the earlier hosts were | |
4281 | delayed, but if the domain has a "retry every time" type of rule - as is | |
4282 | often used for the the very large ISPs, that won't happen. */ | |
0756eb3c PH |
4283 | |
4284 | else | |
4285 | { | |
d427a7f9 JH |
4286 | host_item * thost; |
4287 | /* Make a copy of the host if it is local to this invocation | |
4288 | of the transport. */ | |
4289 | ||
4290 | if (expanded_hosts) | |
4291 | { | |
4292 | thost = store_get(sizeof(host_item)); | |
4293 | *thost = *host; | |
4294 | thost->name = string_copy(host->name); | |
4295 | thost->address = string_copy(host->address); | |
4296 | } | |
4297 | else | |
4298 | thost = host; | |
4299 | ||
0756eb3c PH |
4300 | if (!host_is_expired && ++unexpired_hosts_tried >= ob->hosts_max_try) |
4301 | { | |
4302 | host_item *h; | |
4303 | DEBUG(D_transport) | |
4304 | debug_printf("hosts_max_try limit reached with this host\n"); | |
1a47b633 JH |
4305 | for (h = host; h; h = h->next) if (h->mx != host->mx) |
4306 | { | |
4307 | nexthost = h; | |
4308 | unexpired_hosts_tried--; | |
4309 | DEBUG(D_transport) debug_printf("however, a higher MX host exists " | |
4310 | "and will be tried\n"); | |
4311 | break; | |
4312 | } | |
0756eb3c PH |
4313 | } |
4314 | ||
4315 | /* Attempt the delivery. */ | |
4316 | ||
533244af | 4317 | total_hosts_tried++; |
a843a57e | 4318 | rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock, |
d427a7f9 | 4319 | &message_defer, FALSE); |
0756eb3c PH |
4320 | |
4321 | /* Yield is one of: | |
4322 | OK => connection made, each address contains its result; | |
4323 | message_defer is set for message-specific defers (when all | |
4324 | recipients are marked defer) | |
4325 | DEFER => there was a non-message-specific delivery problem; | |
4326 | ERROR => there was a problem setting up the arguments for a filter, | |
4327 | or there was a problem with expanding added headers | |
4328 | */ | |
4329 | ||
4330 | /* If the result is not OK, there was a non-message-specific problem. | |
4331 | If the result is DEFER, we need to write to the logs saying what happened | |
4332 | for this particular host, except in the case of authentication and TLS | |
4333 | failures, where the log has already been written. If all hosts defer a | |
4334 | general message is written at the end. */ | |
4335 | ||
7b4c8c1f JH |
4336 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL |
4337 | && first_addr->basic_errno != ERRNO_TLSFAILURE) | |
ec62d0a9 | 4338 | write_logs(host, first_addr->message, first_addr->basic_errno); |
0756eb3c | 4339 | |
0cbf2b82 | 4340 | #ifndef DISABLE_EVENT |
d68218c7 | 4341 | if (rc == DEFER) |
774ef2d7 | 4342 | deferred_event_raise(first_addr, host); |
a7538db1 | 4343 | #endif |
d68218c7 | 4344 | |
0756eb3c PH |
4345 | /* If STARTTLS was accepted, but there was a failure in setting up the |
4346 | TLS session (usually a certificate screwup), and the host is not in | |
4347 | hosts_require_tls, and tls_tempfail_tryclear is true, try again, with | |
4348 | TLS forcibly turned off. We have to start from scratch with a new SMTP | |
4349 | connection. That's why the retry is done from here, not from within | |
4350 | smtp_deliver(). [Rejections of STARTTLS itself don't screw up the | |
4351 | session, so the in-clear transmission after those errors, if permitted, | |
4352 | happens inside smtp_deliver().] */ | |
4353 | ||
a7538db1 | 4354 | #ifdef SUPPORT_TLS |
7a31d643 JH |
4355 | if ( rc == DEFER |
4356 | && first_addr->basic_errno == ERRNO_TLSFAILURE | |
4357 | && ob->tls_tempfail_tryclear | |
5130845b | 4358 | && verify_check_given_host(&ob->hosts_require_tls, host) != OK |
7a31d643 | 4359 | ) |
0756eb3c | 4360 | { |
cf0c6164 JH |
4361 | log_write(0, LOG_MAIN, |
4362 | "%s: delivering unencrypted to H=%s [%s] (not in hosts_require_tls)", | |
4363 | first_addr->message, host->name, host->address); | |
0756eb3c | 4364 | first_addr = prepare_addresses(addrlist, host); |
a843a57e | 4365 | rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock, |
d427a7f9 | 4366 | &message_defer, TRUE); |
0756eb3c | 4367 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL) |
ec62d0a9 | 4368 | write_logs(host, first_addr->message, first_addr->basic_errno); |
0cbf2b82 | 4369 | # ifndef DISABLE_EVENT |
d68218c7 | 4370 | if (rc == DEFER) |
774ef2d7 | 4371 | deferred_event_raise(first_addr, host); |
a7538db1 | 4372 | # endif |
0756eb3c | 4373 | } |
a1bccd48 | 4374 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
4375 | } |
4376 | ||
4377 | /* Delivery attempt finished */ | |
4378 | ||
7b4c8c1f JH |
4379 | rs = rc == OK ? US"OK" |
4380 | : rc == DEFER ? US"DEFER" | |
4381 | : rc == ERROR ? US"ERROR" | |
4382 | : US"?"; | |
0756eb3c PH |
4383 | |
4384 | set_process_info("delivering %s: just tried %s [%s] for %s%s: result %s", | |
4385 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4386 | addrlist->next ? " (& others)" : "", rs); |
0756eb3c PH |
4387 | |
4388 | /* Release serialization if set up */ | |
4389 | ||
7b4c8c1f | 4390 | if (serialize_key) enq_end(serialize_key); |
0756eb3c PH |
4391 | |
4392 | /* If the result is DEFER, or if a host retry record is known to exist, we | |
4393 | need to add an item to the retry chain for updating the retry database | |
4394 | at the end of delivery. We only need to add the item to the top address, | |
4395 | of course. Also, if DEFER, we mark the IP address unusable so as to skip it | |
4396 | for any other delivery attempts using the same address. (It is copied into | |
4397 | the unusable tree at the outer level, so even if different address blocks | |
4398 | contain the same address, it still won't get tried again.) */ | |
4399 | ||
7b4c8c1f | 4400 | if (rc == DEFER || retry_host_key) |
0756eb3c | 4401 | { |
7b4c8c1f JH |
4402 | int delete_flag = rc != DEFER ? rf_delete : 0; |
4403 | if (!retry_host_key) | |
0756eb3c | 4404 | { |
9c695f6d JH |
4405 | BOOL incl_ip; |
4406 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4407 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4408 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4409 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4410 | ||
7b4c8c1f JH |
4411 | retry_host_key = incl_ip |
4412 | ? string_sprintf("T:%S:%s%s", host->name, host->address, pistring) | |
4413 | : string_sprintf("T:%S%s", host->name, pistring); | |
0756eb3c PH |
4414 | } |
4415 | ||
4416 | /* If a delivery of another message over an existing SMTP connection | |
4417 | yields DEFER, we do NOT set up retry data for the host. This covers the | |
4418 | case when there are delays in routing the addresses in the second message | |
4419 | that are so long that the server times out. This is alleviated by not | |
4420 | routing addresses that previously had routing defers when handling an | |
4421 | existing connection, but even so, this case may occur (e.g. if a | |
4422 | previously happily routed address starts giving routing defers). If the | |
4423 | host is genuinely down, another non-continued message delivery will | |
4424 | notice it soon enough. */ | |
4425 | ||
7b4c8c1f | 4426 | if (delete_flag != 0 || !continue_hostname) |
0756eb3c PH |
4427 | retry_add_item(first_addr, retry_host_key, rf_host | delete_flag); |
4428 | ||
4429 | /* We may have tried an expired host, if its retry time has come; ensure | |
4430 | the status reflects the expiry for the benefit of any other addresses. */ | |
4431 | ||
4432 | if (rc == DEFER) | |
4433 | { | |
7b4c8c1f JH |
4434 | host->status = host_is_expired |
4435 | ? hstatus_unusable_expired : hstatus_unusable; | |
0756eb3c PH |
4436 | host->why = hwhy_deferred; |
4437 | } | |
4438 | } | |
4439 | ||
4440 | /* If message_defer is set (host was OK, but every recipient got deferred | |
4441 | because of some message-specific problem), or if that had happened | |
4442 | previously so that a message retry key exists, add an appropriate item | |
4443 | to the retry chain. Note that if there was a message defer but now there is | |
4444 | a host defer, the message defer record gets deleted. That seems perfectly | |
4445 | reasonable. Also, stop the message from being remembered as waiting | |
f6c332bd | 4446 | for specific hosts. */ |
0756eb3c | 4447 | |
7b4c8c1f | 4448 | if (message_defer || retry_message_key) |
0756eb3c | 4449 | { |
7b4c8c1f JH |
4450 | int delete_flag = message_defer ? 0 : rf_delete; |
4451 | if (!retry_message_key) | |
0756eb3c | 4452 | { |
9c695f6d JH |
4453 | BOOL incl_ip; |
4454 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4455 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4456 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4457 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4458 | ||
7b4c8c1f JH |
4459 | retry_message_key = incl_ip |
4460 | ? string_sprintf("T:%S:%s%s:%s", host->name, host->address, pistring, | |
4461 | message_id) | |
4462 | : string_sprintf("T:%S%s:%s", host->name, pistring, message_id); | |
0756eb3c PH |
4463 | } |
4464 | retry_add_item(addrlist, retry_message_key, | |
4465 | rf_message | rf_host | delete_flag); | |
f6c332bd | 4466 | update_waiting = FALSE; |
0756eb3c PH |
4467 | } |
4468 | ||
4469 | /* Any return other than DEFER (that is, OK or ERROR) means that the | |
4470 | addresses have got their final statuses filled in for this host. In the OK | |
4471 | case, see if any of them are deferred. */ | |
4472 | ||
4473 | if (rc == OK) | |
4cea764f | 4474 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4475 | if (addr->transport_return == DEFER) |
4476 | { | |
4477 | some_deferred = TRUE; | |
4478 | break; | |
4479 | } | |
0756eb3c PH |
4480 | |
4481 | /* If no addresses deferred or the result was ERROR, return. We do this for | |
4482 | ERROR because a failing filter set-up or add_headers expansion is likely to | |
4483 | fail for any host we try. */ | |
4484 | ||
4485 | if (rc == ERROR || (rc == OK && !some_deferred)) | |
4486 | { | |
4487 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4488 | return TRUE; /* Each address has its status */ | |
4489 | } | |
4490 | ||
4491 | /* If the result was DEFER or some individual addresses deferred, let | |
4492 | the loop run to try other hosts with the deferred addresses, except for the | |
4493 | case when we were trying to deliver down an existing channel and failed. | |
4494 | Don't try any other hosts in this case. */ | |
4495 | ||
7b4c8c1f | 4496 | if (continue_hostname) break; |
0756eb3c PH |
4497 | |
4498 | /* If the whole delivery, or some individual addresses, were deferred and | |
4499 | there are more hosts that could be tried, do not count this host towards | |
4500 | the hosts_max_try limit if the age of the message is greater than the | |
4501 | maximum retry time for this host. This means we may try try all hosts, | |
4502 | ignoring the limit, when messages have been around for some time. This is | |
4503 | important because if we don't try all hosts, the address will never time | |
533244af | 4504 | out. NOTE: this does not apply to hosts_max_try_hardlimit. */ |
0756eb3c | 4505 | |
7b4c8c1f | 4506 | if ((rc == DEFER || some_deferred) && nexthost) |
0756eb3c PH |
4507 | { |
4508 | BOOL timedout; | |
4509 | retry_config *retry = retry_find_config(host->name, NULL, 0, 0); | |
4510 | ||
7b4c8c1f | 4511 | if (retry && retry->rules) |
0756eb3c PH |
4512 | { |
4513 | retry_rule *last_rule; | |
4514 | for (last_rule = retry->rules; | |
7b4c8c1f | 4515 | last_rule->next; |
0756eb3c | 4516 | last_rule = last_rule->next); |
32dfdf8b | 4517 | timedout = time(NULL) - received_time.tv_sec > last_rule->timeout; |
0756eb3c PH |
4518 | } |
4519 | else timedout = TRUE; /* No rule => timed out */ | |
4520 | ||
4521 | if (timedout) | |
4522 | { | |
4523 | unexpired_hosts_tried--; | |
4524 | DEBUG(D_transport) debug_printf("temporary delivery error(s) override " | |
4525 | "hosts_max_try (message older than host's retry time)\n"); | |
4526 | } | |
4527 | } | |
4528 | } /* End of loop for trying multiple hosts. */ | |
4529 | ||
2577f55f JH |
4530 | /* If we failed to find a matching host in the list, for an already-open |
4531 | connection, just close it and start over with the list. This can happen | |
4532 | for routing that changes from run to run, or big multi-IP sites with | |
4533 | round-robin DNS. */ | |
4534 | ||
4535 | if (continue_hostname && !continue_host_tried) | |
4536 | { | |
4537 | int fd = cutthrough.fd >= 0 ? cutthrough.fd : 0; | |
4538 | ||
4539 | DEBUG(D_transport) debug_printf("no hosts match already-open connection\n"); | |
4540 | #ifdef SUPPORT_TLS | |
4541 | if (tls_out.active == fd) | |
4542 | { | |
4543 | (void) tls_write(FALSE, US"QUIT\r\n", 6, FALSE); | |
4544 | tls_close(FALSE, TRUE); | |
4545 | } | |
4546 | else | |
4547 | #else | |
4548 | (void) write(fd, US"QUIT\r\n", 6); | |
4549 | #endif | |
4550 | (void) close(fd); | |
4551 | cutthrough.fd = -1; | |
4552 | continue_hostname = NULL; | |
4553 | goto retry_non_continued; | |
4554 | } | |
4555 | ||
0756eb3c PH |
4556 | /* This is the end of the loop that repeats iff expired is TRUE and |
4557 | ob->delay_after_cutoff is FALSE. The second time round we will | |
4558 | try those hosts that haven't been tried since the message arrived. */ | |
4559 | ||
4560 | DEBUG(D_transport) | |
4561 | { | |
4562 | debug_printf("all IP addresses skipped or deferred at least one address\n"); | |
4563 | if (expired && !ob->delay_after_cutoff && cutoff_retry == 0) | |
4564 | debug_printf("retrying IP addresses not tried since message arrived\n"); | |
4565 | } | |
4566 | } | |
4567 | ||
4568 | ||
4569 | /* Get here if all IP addresses are skipped or defer at least one address. In | |
4570 | MUA wrapper mode, this will happen only for connection or other non-message- | |
4571 | specific failures. Force the delivery status for all addresses to FAIL. */ | |
4572 | ||
4573 | if (mua_wrapper) | |
4574 | { | |
7b4c8c1f | 4575 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4576 | addr->transport_return = FAIL; |
4577 | goto END_TRANSPORT; | |
4578 | } | |
4579 | ||
4580 | /* In the normal, non-wrapper case, add a standard message to each deferred | |
4581 | address if there hasn't been an error, that is, if it hasn't actually been | |
4582 | tried this time. The variable "expired" will be FALSE if any deliveries were | |
4583 | actually tried, or if there was at least one host that was not expired. That | |
4584 | is, it is TRUE only if no deliveries were tried and all hosts were expired. If | |
4585 | a delivery has been tried, an error code will be set, and the failing of the | |
4586 | message is handled by the retry code later. | |
4587 | ||
4588 | If queue_smtp is set, or this transport was called to send a subsequent message | |
4589 | down an existing TCP/IP connection, and something caused the host not to be | |
4590 | found, we end up here, but can detect these cases and handle them specially. */ | |
4591 | ||
c3f2eb9a | 4592 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4593 | { |
4594 | /* If host is not NULL, it means that we stopped processing the host list | |
533244af PH |
4595 | because of hosts_max_try or hosts_max_try_hardlimit. In the former case, this |
4596 | means we need to behave as if some hosts were skipped because their retry | |
4597 | time had not come. Specifically, this prevents the address from timing out. | |
8e669ac1 | 4598 | However, if we have hit hosts_max_try_hardlimit, we want to behave as if all |
533244af | 4599 | hosts were tried. */ |
0756eb3c | 4600 | |
c3f2eb9a | 4601 | if (host) |
533244af PH |
4602 | if (total_hosts_tried >= ob->hosts_max_try_hardlimit) |
4603 | { | |
4604 | DEBUG(D_transport) | |
4605 | debug_printf("hosts_max_try_hardlimit reached: behave as if all " | |
4606 | "hosts were tried\n"); | |
4607 | } | |
4608 | else | |
8e669ac1 | 4609 | { |
533244af PH |
4610 | DEBUG(D_transport) |
4611 | debug_printf("hosts_max_try limit caused some hosts to be skipped\n"); | |
4612 | setflag(addr, af_retry_skipped); | |
8e669ac1 | 4613 | } |
0756eb3c PH |
4614 | |
4615 | if (queue_smtp) /* no deliveries attempted */ | |
4616 | { | |
4617 | addr->transport_return = DEFER; | |
4618 | addr->basic_errno = 0; | |
4619 | addr->message = US"SMTP delivery explicitly queued"; | |
4620 | } | |
4621 | ||
c3f2eb9a JH |
4622 | else if ( addr->transport_return == DEFER |
4623 | && (addr->basic_errno == ERRNO_UNKNOWNERROR || addr->basic_errno == 0) | |
4624 | && !addr->message | |
4625 | ) | |
0756eb3c PH |
4626 | { |
4627 | addr->basic_errno = ERRNO_HRETRY; | |
c3f2eb9a | 4628 | if (continue_hostname) |
0756eb3c | 4629 | addr->message = US"no host found for existing SMTP connection"; |
0756eb3c PH |
4630 | else if (expired) |
4631 | { | |
fffffe4c | 4632 | setflag(addr, af_pass_message); /* This is not a security risk */ |
c3f2eb9a JH |
4633 | addr->message = string_sprintf( |
4634 | "all hosts%s have been failing for a long time %s", | |
4635 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US"", | |
4636 | ob->delay_after_cutoff | |
4637 | ? US"(and retry time not reached)" | |
4638 | : US"and were last tried after this message arrived"); | |
0756eb3c PH |
4639 | |
4640 | /* If we are already using fallback hosts, or there are no fallback hosts | |
4641 | defined, convert the result to FAIL to cause a bounce. */ | |
4642 | ||
c3f2eb9a | 4643 | if (addr->host_list == addr->fallback_hosts || !addr->fallback_hosts) |
0756eb3c PH |
4644 | addr->transport_return = FAIL; |
4645 | } | |
4646 | else | |
4647 | { | |
93a680e4 | 4648 | const char * s; |
0756eb3c | 4649 | if (hosts_retry == hosts_total) |
93a680e4 | 4650 | s = "retry time not reached for any host%s"; |
0756eb3c | 4651 | else if (hosts_fail == hosts_total) |
93a680e4 | 4652 | s = "all host address lookups%s failed permanently"; |
0756eb3c | 4653 | else if (hosts_defer == hosts_total) |
93a680e4 | 4654 | s = "all host address lookups%s failed temporarily"; |
0756eb3c | 4655 | else if (hosts_serial == hosts_total) |
93a680e4 | 4656 | s = "connection limit reached for all hosts%s"; |
0756eb3c | 4657 | else if (hosts_fail+hosts_defer == hosts_total) |
93a680e4 | 4658 | s = "all host address lookups%s failed"; |
3cf01803 | 4659 | else |
93a680e4 | 4660 | s = "some host address lookups failed and retry time " |
3cf01803 JH |
4661 | "not reached for other hosts or connection limit reached%s"; |
4662 | ||
4663 | addr->message = string_sprintf(s, | |
4664 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US""); | |
0756eb3c PH |
4665 | } |
4666 | } | |
4667 | } | |
4668 | ||
4669 | /* Update the database which keeps information about which messages are waiting | |
f6c332bd PH |
4670 | for which hosts to become available. For some message-specific errors, the |
4671 | update_waiting flag is turned off because we don't want follow-on deliveries in | |
ea722490 | 4672 | those cases. If this transport instance is explicitly limited to one message |
8b260705 PP |
4673 | per connection then follow-on deliveries are not possible and there's no need |
4674 | to create/update the per-transport wait-<transport_name> database. */ | |
0756eb3c | 4675 | |
ea722490 JH |
4676 | if (update_waiting && tblock->connection_max_messages != 1) |
4677 | transport_update_waiting(hostlist, tblock->name); | |
0756eb3c PH |
4678 | |
4679 | END_TRANSPORT: | |
4680 | ||
4681 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4682 | ||
4683 | return TRUE; /* Each address has its status */ | |
4684 | } | |
4685 | ||
d185889f | 4686 | #endif /*!MACRO_PREDEF*/ |
578897ea JH |
4687 | /* vi: aw ai sw=2 |
4688 | */ | |
0756eb3c | 4689 | /* End of transport/smtp.c */ |