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) }, |
f7572e5a | 46 | { "dkim_private_key", opt_stringptr, |
ff5aac2b | 47 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_private_key) }, |
f7572e5a | 48 | { "dkim_selector", opt_stringptr, |
ff5aac2b | 49 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_selector) }, |
f7572e5a | 50 | { "dkim_sign_headers", opt_stringptr, |
ff5aac2b | 51 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_sign_headers) }, |
f7572e5a | 52 | { "dkim_strict", opt_stringptr, |
ff5aac2b | 53 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_strict) }, |
80a47a2c | 54 | #endif |
0756eb3c PH |
55 | { "dns_qualify_single", opt_bool, |
56 | (void *)offsetof(smtp_transport_options_block, dns_qualify_single) }, | |
57 | { "dns_search_parents", opt_bool, | |
58 | (void *)offsetof(smtp_transport_options_block, dns_search_parents) }, | |
578897ea | 59 | { "dnssec_request_domains", opt_stringptr, |
7cd171b7 | 60 | (void *)offsetof(smtp_transport_options_block, dnssec.request) }, |
578897ea | 61 | { "dnssec_require_domains", opt_stringptr, |
7cd171b7 | 62 | (void *)offsetof(smtp_transport_options_block, dnssec.require) }, |
9e4f5962 PP |
63 | { "dscp", opt_stringptr, |
64 | (void *)offsetof(smtp_transport_options_block, dscp) }, | |
0756eb3c PH |
65 | { "fallback_hosts", opt_stringptr, |
66 | (void *)offsetof(smtp_transport_options_block, fallback_hosts) }, | |
67 | { "final_timeout", opt_time, | |
68 | (void *)offsetof(smtp_transport_options_block, final_timeout) }, | |
69 | { "gethostbyname", opt_bool, | |
70 | (void *)offsetof(smtp_transport_options_block, gethostbyname) }, | |
71 | { "helo_data", opt_stringptr, | |
72 | (void *)offsetof(smtp_transport_options_block, helo_data) }, | |
73 | { "hosts", opt_stringptr, | |
74 | (void *)offsetof(smtp_transport_options_block, hosts) }, | |
75 | { "hosts_avoid_esmtp", opt_stringptr, | |
76 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_esmtp) }, | |
c51b8e75 PH |
77 | { "hosts_avoid_pipelining", opt_stringptr, |
78 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_pipelining) }, | |
80a47a2c | 79 | #ifdef SUPPORT_TLS |
0756eb3c PH |
80 | { "hosts_avoid_tls", opt_stringptr, |
81 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_tls) }, | |
80a47a2c | 82 | #endif |
0756eb3c PH |
83 | { "hosts_max_try", opt_int, |
84 | (void *)offsetof(smtp_transport_options_block, hosts_max_try) }, | |
533244af PH |
85 | { "hosts_max_try_hardlimit", opt_int, |
86 | (void *)offsetof(smtp_transport_options_block, hosts_max_try_hardlimit) }, | |
80a47a2c | 87 | #ifdef SUPPORT_TLS |
0756eb3c PH |
88 | { "hosts_nopass_tls", opt_stringptr, |
89 | (void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) }, | |
80a47a2c | 90 | #endif |
0756eb3c PH |
91 | { "hosts_override", opt_bool, |
92 | (void *)offsetof(smtp_transport_options_block, hosts_override) }, | |
93 | { "hosts_randomize", opt_bool, | |
94 | (void *)offsetof(smtp_transport_options_block, hosts_randomize) }, | |
f2de3a33 | 95 | #if defined(SUPPORT_TLS) && !defined(DISABLE_OCSP) |
44662487 JH |
96 | { "hosts_request_ocsp", opt_stringptr, |
97 | (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) }, | |
98 | #endif | |
0756eb3c PH |
99 | { "hosts_require_auth", opt_stringptr, |
100 | (void *)offsetof(smtp_transport_options_block, hosts_require_auth) }, | |
80a47a2c | 101 | #ifdef SUPPORT_TLS |
7a31d643 JH |
102 | # ifdef EXPERIMENTAL_DANE |
103 | { "hosts_require_dane", opt_stringptr, | |
104 | (void *)offsetof(smtp_transport_options_block, hosts_require_dane) }, | |
105 | # endif | |
f2de3a33 | 106 | # ifndef DISABLE_OCSP |
f5d78688 JH |
107 | { "hosts_require_ocsp", opt_stringptr, |
108 | (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) }, | |
109 | # endif | |
0756eb3c PH |
110 | { "hosts_require_tls", opt_stringptr, |
111 | (void *)offsetof(smtp_transport_options_block, hosts_require_tls) }, | |
80a47a2c | 112 | #endif |
0756eb3c PH |
113 | { "hosts_try_auth", opt_stringptr, |
114 | (void *)offsetof(smtp_transport_options_block, hosts_try_auth) }, | |
f98442df JH |
115 | { "hosts_try_chunking", opt_stringptr, |
116 | (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) }, | |
7a31d643 | 117 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
96e47838 TL |
118 | { "hosts_try_dane", opt_stringptr, |
119 | (void *)offsetof(smtp_transport_options_block, hosts_try_dane) }, | |
120 | #endif | |
fb05276a JH |
121 | { "hosts_try_fastopen", opt_stringptr, |
122 | (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) }, | |
8ccd00b1 | 123 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
124 | { "hosts_try_prdr", opt_stringptr, |
125 | (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) }, | |
126 | #endif | |
99400968 JH |
127 | #ifdef SUPPORT_TLS |
128 | { "hosts_verify_avoid_tls", opt_stringptr, | |
129 | (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) }, | |
130 | #endif | |
0756eb3c PH |
131 | { "interface", opt_stringptr, |
132 | (void *)offsetof(smtp_transport_options_block, interface) }, | |
133 | { "keepalive", opt_bool, | |
134 | (void *)offsetof(smtp_transport_options_block, keepalive) }, | |
f1513293 PH |
135 | { "lmtp_ignore_quota", opt_bool, |
136 | (void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) }, | |
0756eb3c PH |
137 | { "max_rcpt", opt_int | opt_public, |
138 | (void *)offsetof(transport_instance, max_addresses) }, | |
506900af | 139 | { "multi_domain", opt_expand_bool | opt_public, |
0756eb3c PH |
140 | (void *)offsetof(transport_instance, multi_domain) }, |
141 | { "port", opt_stringptr, | |
142 | (void *)offsetof(smtp_transport_options_block, port) }, | |
143 | { "protocol", opt_stringptr, | |
144 | (void *)offsetof(smtp_transport_options_block, protocol) }, | |
9c695f6d | 145 | { "retry_include_ip_address", opt_expand_bool, |
0756eb3c PH |
146 | (void *)offsetof(smtp_transport_options_block, retry_include_ip_address) }, |
147 | { "serialize_hosts", opt_stringptr, | |
148 | (void *)offsetof(smtp_transport_options_block, serialize_hosts) }, | |
149 | { "size_addition", opt_int, | |
150 | (void *)offsetof(smtp_transport_options_block, size_addition) } | |
f0989ec0 | 151 | #ifdef SUPPORT_SOCKS |
7eb6c37c JH |
152 | ,{ "socks_proxy", opt_stringptr, |
153 | (void *)offsetof(smtp_transport_options_block, socks_proxy) } | |
154 | #endif | |
80a47a2c | 155 | #ifdef SUPPORT_TLS |
0756eb3c PH |
156 | ,{ "tls_certificate", opt_stringptr, |
157 | (void *)offsetof(smtp_transport_options_block, tls_certificate) }, | |
158 | { "tls_crl", opt_stringptr, | |
159 | (void *)offsetof(smtp_transport_options_block, tls_crl) }, | |
54c90be1 PP |
160 | { "tls_dh_min_bits", opt_int, |
161 | (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) }, | |
0756eb3c PH |
162 | { "tls_privatekey", opt_stringptr, |
163 | (void *)offsetof(smtp_transport_options_block, tls_privatekey) }, | |
3f0945ff | 164 | { "tls_require_ciphers", opt_stringptr, |
0756eb3c | 165 | (void *)offsetof(smtp_transport_options_block, tls_require_ciphers) }, |
3f0945ff PP |
166 | { "tls_sni", opt_stringptr, |
167 | (void *)offsetof(smtp_transport_options_block, tls_sni) }, | |
0756eb3c PH |
168 | { "tls_tempfail_tryclear", opt_bool, |
169 | (void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) }, | |
a63be306 WB |
170 | { "tls_try_verify_hosts", opt_stringptr, |
171 | (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) }, | |
e51c7be2 JH |
172 | { "tls_verify_cert_hostnames", opt_stringptr, |
173 | (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)}, | |
0756eb3c | 174 | { "tls_verify_certificates", opt_stringptr, |
a63be306 WB |
175 | (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) }, |
176 | { "tls_verify_hosts", opt_stringptr, | |
177 | (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) } | |
80a47a2c | 178 | #endif |
0756eb3c PH |
179 | }; |
180 | ||
181 | /* Size of the options list. An extern variable has to be used so that its | |
182 | address can appear in the tables drtables.c. */ | |
183 | ||
184 | int smtp_transport_options_count = | |
185 | sizeof(smtp_transport_options)/sizeof(optionlist); | |
186 | ||
187 | /* Default private options block for the smtp transport. */ | |
188 | ||
189 | smtp_transport_options_block smtp_transport_option_defaults = { | |
190 | NULL, /* hosts */ | |
191 | NULL, /* fallback_hosts */ | |
192 | NULL, /* hostlist */ | |
193 | NULL, /* fallback_hostlist */ | |
194 | NULL, /* authenticated_sender */ | |
195 | US"$primary_hostname", /* helo_data */ | |
196 | NULL, /* interface */ | |
197 | NULL, /* port */ | |
198 | US"smtp", /* protocol */ | |
9e4f5962 | 199 | NULL, /* DSCP */ |
0756eb3c PH |
200 | NULL, /* serialize_hosts */ |
201 | NULL, /* hosts_try_auth */ | |
202 | NULL, /* hosts_require_auth */ | |
f98442df | 203 | US"*", /* hosts_try_chunking */ |
96e47838 TL |
204 | #ifdef EXPERIMENTAL_DANE |
205 | NULL, /* hosts_try_dane */ | |
7a31d643 | 206 | NULL, /* hosts_require_dane */ |
96e47838 | 207 | #endif |
fb05276a | 208 | NULL, /* hosts_try_fastopen */ |
8ccd00b1 | 209 | #ifndef DISABLE_PRDR |
f98442df | 210 | US"*", /* hosts_try_prdr */ |
f5d78688 | 211 | #endif |
f2de3a33 | 212 | #ifndef DISABLE_OCSP |
0e66b3b6 | 213 | US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */ |
f5d78688 | 214 | NULL, /* hosts_require_ocsp */ |
fd98a5c6 | 215 | #endif |
0756eb3c PH |
216 | NULL, /* hosts_require_tls */ |
217 | NULL, /* hosts_avoid_tls */ | |
6c9ed72e | 218 | NULL, /* hosts_verify_avoid_tls */ |
c51b8e75 | 219 | NULL, /* hosts_avoid_pipelining */ |
0756eb3c PH |
220 | NULL, /* hosts_avoid_esmtp */ |
221 | NULL, /* hosts_nopass_tls */ | |
222 | 5*60, /* command_timeout */ | |
223 | 5*60, /* connect_timeout; shorter system default overrides */ | |
224 | 5*60, /* data timeout */ | |
225 | 10*60, /* final timeout */ | |
226 | 1024, /* size_addition */ | |
227 | 5, /* hosts_max_try */ | |
8e669ac1 | 228 | 50, /* hosts_max_try_hardlimit */ |
48c7f9e2 | 229 | TRUE, /* address_retry_include_sender */ |
0756eb3c | 230 | FALSE, /* allow_localhost */ |
382afc6b | 231 | FALSE, /* authenticated_sender_force */ |
0756eb3c PH |
232 | FALSE, /* gethostbyname */ |
233 | TRUE, /* dns_qualify_single */ | |
234 | FALSE, /* dns_search_parents */ | |
0539a19d | 235 | { NULL, NULL }, /* dnssec_domains {request,require} */ |
0756eb3c PH |
236 | TRUE, /* delay_after_cutoff */ |
237 | FALSE, /* hosts_override */ | |
238 | FALSE, /* hosts_randomize */ | |
239 | TRUE, /* keepalive */ | |
f1513293 | 240 | FALSE, /* lmtp_ignore_quota */ |
9c695f6d | 241 | NULL, /* expand_retry_include_ip_address */ |
0756eb3c | 242 | TRUE /* retry_include_ip_address */ |
f0989ec0 | 243 | #ifdef SUPPORT_SOCKS |
7eb6c37c | 244 | ,NULL /* socks_proxy */ |
b8bf753b | 245 | #endif |
80a47a2c | 246 | #ifdef SUPPORT_TLS |
0756eb3c PH |
247 | ,NULL, /* tls_certificate */ |
248 | NULL, /* tls_crl */ | |
249 | NULL, /* tls_privatekey */ | |
250 | NULL, /* tls_require_ciphers */ | |
54c90be1 | 251 | NULL, /* tls_sni */ |
0e0f3f56 | 252 | US"system", /* tls_verify_certificates */ |
54c90be1 PP |
253 | EXIM_CLIENT_DH_DEFAULT_MIN_BITS, |
254 | /* tls_dh_min_bits */ | |
a63be306 WB |
255 | TRUE, /* tls_tempfail_tryclear */ |
256 | NULL, /* tls_verify_hosts */ | |
610ff438 | 257 | US"*", /* tls_try_verify_hosts */ |
01a4a5c5 | 258 | US"*" /* tls_verify_cert_hostnames */ |
80a47a2c TK |
259 | #endif |
260 | #ifndef DISABLE_DKIM | |
ff5aac2b JH |
261 | , {NULL, /* dkim_canon */ |
262 | NULL, /* dkim_domain */ | |
263 | NULL, /* dkim_private_key */ | |
264 | NULL, /* dkim_selector */ | |
265 | NULL, /* dkim_sign_headers */ | |
e983e85a JH |
266 | NULL, /* dkim_strict */ |
267 | FALSE} /* dot_stuffed */ | |
80a47a2c | 268 | #endif |
0756eb3c PH |
269 | }; |
270 | ||
6c1c3d1d WB |
271 | /* some DSN flags for use later */ |
272 | ||
273 | static int rf_list[] = {rf_notify_never, rf_notify_success, | |
274 | rf_notify_failure, rf_notify_delay }; | |
275 | ||
45500060 | 276 | static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" }; |
6c1c3d1d WB |
277 | |
278 | ||
0756eb3c PH |
279 | |
280 | /* Local statics */ | |
281 | ||
87cb4a16 JH |
282 | static uschar *smtp_command; /* Points to last cmd for error messages */ |
283 | static uschar *mail_command; /* Points to MAIL cmd for error messages */ | |
284 | static uschar *data_command = US""; /* Points to DATA cmd for error messages */ | |
285 | static BOOL update_waiting; /* TRUE to update the "wait" database */ | |
286 | static BOOL pipelining_active; /* current transaction is in pipe mode */ | |
0756eb3c PH |
287 | |
288 | ||
289 | /************************************************* | |
290 | * Setup entry point * | |
291 | *************************************************/ | |
292 | ||
293 | /* This function is called when the transport is about to be used, | |
294 | but before running it in a sub-process. It is used for two things: | |
295 | ||
296 | (1) To set the fallback host list in addresses, when delivering. | |
26da7e20 PH |
297 | (2) To pass back the interface, port, protocol, and other options, for use |
298 | during callout verification. | |
0756eb3c PH |
299 | |
300 | Arguments: | |
301 | tblock pointer to the transport instance block | |
302 | addrlist list of addresses about to be transported | |
303 | tf if not NULL, pointer to block in which to return options | |
929ba01c PH |
304 | uid the uid that will be set (not used) |
305 | gid the gid that will be set (not used) | |
0756eb3c PH |
306 | errmsg place for error message (not used) |
307 | ||
308 | Returns: OK always (FAIL, DEFER not used) | |
309 | */ | |
310 | ||
311 | static int | |
312 | smtp_transport_setup(transport_instance *tblock, address_item *addrlist, | |
929ba01c | 313 | transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg) |
0756eb3c PH |
314 | { |
315 | smtp_transport_options_block *ob = | |
316 | (smtp_transport_options_block *)(tblock->options_block); | |
317 | ||
318 | errmsg = errmsg; /* Keep picky compilers happy */ | |
929ba01c PH |
319 | uid = uid; |
320 | gid = gid; | |
0756eb3c PH |
321 | |
322 | /* Pass back options if required. This interface is getting very messy. */ | |
323 | ||
02b41d71 | 324 | if (tf) |
0756eb3c PH |
325 | { |
326 | tf->interface = ob->interface; | |
327 | tf->port = ob->port; | |
328 | tf->protocol = ob->protocol; | |
329 | tf->hosts = ob->hosts; | |
330 | tf->hosts_override = ob->hosts_override; | |
331 | tf->hosts_randomize = ob->hosts_randomize; | |
332 | tf->gethostbyname = ob->gethostbyname; | |
333 | tf->qualify_single = ob->dns_qualify_single; | |
334 | tf->search_parents = ob->dns_search_parents; | |
26da7e20 | 335 | tf->helo_data = ob->helo_data; |
0756eb3c PH |
336 | } |
337 | ||
338 | /* Set the fallback host list for all the addresses that don't have fallback | |
339 | host lists, provided that the local host wasn't present in the original host | |
340 | list. */ | |
341 | ||
342 | if (!testflag(addrlist, af_local_host_removed)) | |
02b41d71 JH |
343 | for (; addrlist; addrlist = addrlist->next) |
344 | if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist; | |
0756eb3c PH |
345 | |
346 | return OK; | |
347 | } | |
348 | ||
349 | ||
350 | ||
351 | /************************************************* | |
352 | * Initialization entry point * | |
353 | *************************************************/ | |
354 | ||
355 | /* Called for each instance, after its options have been read, to | |
356 | enable consistency checks to be done, or anything else that needs | |
357 | to be set up. | |
358 | ||
359 | Argument: pointer to the transport instance block | |
360 | Returns: nothing | |
361 | */ | |
362 | ||
363 | void | |
364 | smtp_transport_init(transport_instance *tblock) | |
365 | { | |
366 | smtp_transport_options_block *ob = | |
367 | (smtp_transport_options_block *)(tblock->options_block); | |
368 | ||
369 | /* Retry_use_local_part defaults FALSE if unset */ | |
370 | ||
371 | if (tblock->retry_use_local_part == TRUE_UNSET) | |
372 | tblock->retry_use_local_part = FALSE; | |
373 | ||
374 | /* Set the default port according to the protocol */ | |
375 | ||
376 | if (ob->port == NULL) | |
061b7ebd PP |
377 | ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" : |
378 | (strcmpic(ob->protocol, US"smtps") == 0)? US"smtps" : US"smtp"; | |
0756eb3c PH |
379 | |
380 | /* Set up the setup entry point, to be called before subprocesses for this | |
381 | transport. */ | |
382 | ||
383 | tblock->setup = smtp_transport_setup; | |
384 | ||
385 | /* Complain if any of the timeouts are zero. */ | |
386 | ||
387 | if (ob->command_timeout <= 0 || ob->data_timeout <= 0 || | |
388 | ob->final_timeout <= 0) | |
389 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
390 | "command, data, or final timeout value is zero for %s transport", | |
391 | tblock->name); | |
392 | ||
393 | /* If hosts_override is set and there are local hosts, set the global | |
394 | flag that stops verify from showing router hosts. */ | |
395 | ||
396 | if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE; | |
397 | ||
398 | /* If there are any fallback hosts listed, build a chain of host items | |
399 | for them, but do not do any lookups at this time. */ | |
400 | ||
401 | host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE); | |
402 | } | |
403 | ||
404 | ||
405 | ||
406 | ||
407 | ||
408 | /************************************************* | |
409 | * Set delivery info into all active addresses * | |
410 | *************************************************/ | |
411 | ||
412 | /* Only addresses whose status is >= PENDING are relevant. A lesser | |
413 | status means that an address is not currently being processed. | |
414 | ||
415 | Arguments: | |
447d236c PH |
416 | addrlist points to a chain of addresses |
417 | errno_value to put in each address's errno field | |
418 | msg to put in each address's message field | |
419 | rc to put in each address's transport_return field | |
420 | pass_message if TRUE, set the "pass message" flag in the address | |
c562fd30 | 421 | host if set, mark addrs as having used this host |
895fbaf2 JH |
422 | smtp_greeting from peer |
423 | helo_response from peer | |
0756eb3c PH |
424 | |
425 | If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in | |
426 | the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate | |
427 | this particular type of timeout. | |
428 | ||
429 | Returns: nothing | |
430 | */ | |
431 | ||
7cd1141b PH |
432 | static void |
433 | set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
895fbaf2 JH |
434 | BOOL pass_message, host_item * host |
435 | #ifdef EXPERIMENTAL_DSN_INFO | |
436 | , const uschar * smtp_greeting, const uschar * helo_response | |
437 | #endif | |
438 | ) | |
0756eb3c PH |
439 | { |
440 | address_item *addr; | |
441 | int orvalue = 0; | |
442 | if (errno_value == ERRNO_CONNECTTIMEOUT) | |
443 | { | |
444 | errno_value = ETIMEDOUT; | |
445 | orvalue = RTEF_CTOUT; | |
446 | } | |
895fbaf2 | 447 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b | 448 | if (addr->transport_return >= PENDING) |
447d236c | 449 | { |
168dec3b JH |
450 | addr->basic_errno = errno_value; |
451 | addr->more_errno |= orvalue; | |
02b41d71 | 452 | if (msg) |
168dec3b JH |
453 | { |
454 | addr->message = msg; | |
455 | if (pass_message) setflag(addr, af_pass_message); | |
456 | } | |
457 | addr->transport_return = rc; | |
458 | if (host) | |
895fbaf2 | 459 | { |
168dec3b | 460 | addr->host_used = host; |
895fbaf2 JH |
461 | #ifdef EXPERIMENTAL_DSN_INFO |
462 | if (smtp_greeting) | |
463 | {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';} | |
464 | addr->smtp_greeting = smtp_greeting; | |
465 | ||
466 | if (helo_response) | |
467 | {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';} | |
468 | addr->helo_response = helo_response; | |
469 | #endif | |
470 | } | |
447d236c | 471 | } |
0756eb3c PH |
472 | } |
473 | ||
895fbaf2 JH |
474 | static void |
475 | set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
476 | BOOL pass_message) | |
477 | { | |
478 | set_errno(addrlist, errno_value, msg, rc, pass_message, NULL | |
479 | #ifdef EXPERIMENTAL_DSN_INFO | |
480 | , NULL, NULL | |
481 | #endif | |
482 | ); | |
483 | } | |
0756eb3c PH |
484 | |
485 | ||
486 | /************************************************* | |
487 | * Check an SMTP response * | |
488 | *************************************************/ | |
489 | ||
490 | /* This function is given an errno code and the SMTP response buffer | |
491 | to analyse, together with the host identification for generating messages. It | |
492 | sets an appropriate message and puts the first digit of the response code into | |
493 | the yield variable. If no response was actually read, a suitable digit is | |
494 | chosen. | |
495 | ||
496 | Arguments: | |
447d236c PH |
497 | host the current host, to get its name for messages |
498 | errno_value pointer to the errno value | |
499 | more_errno from the top address for use with ERRNO_FILTER_FAIL | |
500 | buffer the SMTP response buffer | |
501 | yield where to put a one-digit SMTP response code | |
4c04137d | 502 | message where to put an error message |
447d236c PH |
503 | pass_message set TRUE if message is an SMTP response |
504 | ||
505 | Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE | |
0756eb3c PH |
506 | */ |
507 | ||
a7538db1 JH |
508 | static BOOL |
509 | check_response(host_item *host, int *errno_value, int more_errno, | |
447d236c | 510 | uschar *buffer, int *yield, uschar **message, BOOL *pass_message) |
0756eb3c | 511 | { |
0d9fa8c0 | 512 | uschar * pl = pipelining_active ? US"pipelined " : US""; |
e9166683 | 513 | const uschar * s; |
0756eb3c PH |
514 | |
515 | *yield = '4'; /* Default setting is to give a temporary error */ | |
516 | ||
e9166683 | 517 | switch(*errno_value) |
0756eb3c | 518 | { |
e9166683 JH |
519 | case ETIMEDOUT: /* Handle response timeout */ |
520 | *message = US string_sprintf("SMTP timeout after %s%s", | |
521 | pl, smtp_command); | |
522 | if (transport_count > 0) | |
523 | *message = US string_sprintf("%s (%d bytes written)", *message, | |
524 | transport_count); | |
525 | return FALSE; | |
526 | ||
527 | case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */ | |
528 | s = string_printing(buffer); | |
529 | while (isspace(*s)) s++; | |
530 | *message = *s == 0 | |
531 | ? string_sprintf("Malformed SMTP reply (an empty line) " | |
532 | "in response to %s%s", pl, smtp_command) | |
533 | : string_sprintf("Malformed SMTP reply in response to %s%s: %s", | |
534 | pl, smtp_command, s); | |
535 | return FALSE; | |
536 | ||
537 | case ERRNO_FILTER_FAIL: /* Handle a failed filter process error; | |
538 | can't send QUIT as we mustn't end the DATA. */ | |
539 | *message = string_sprintf("transport filter process failed (%d)%s", | |
540 | more_errno, | |
541 | more_errno == EX_EXECFAILED ? ": unable to execute command" : ""); | |
542 | return FALSE; | |
543 | ||
544 | case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion; | |
545 | can't send QUIT as we mustn't end the DATA. */ | |
546 | *message = | |
547 | string_sprintf("failed to expand headers_add or headers_remove: %s", | |
548 | expand_string_message); | |
549 | return FALSE; | |
550 | ||
551 | case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */ | |
552 | *message = string_sprintf("failed to write a data block"); | |
553 | return FALSE; | |
0756eb3c | 554 | |
8c5d388a | 555 | #ifdef SUPPORT_I18N |
e9166683 JH |
556 | case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */ |
557 | *message = US"utf8 support required but not offered for forwarding"; | |
558 | DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message); | |
559 | return TRUE; | |
250b6871 | 560 | #endif |
e9166683 | 561 | } |
250b6871 | 562 | |
0756eb3c PH |
563 | /* Handle error responses from the remote mailer. */ |
564 | ||
565 | if (buffer[0] != 0) | |
566 | { | |
e9166683 JH |
567 | *message = string_sprintf("SMTP error from remote mail server after %s%s: " |
568 | "%s", pl, smtp_command, s = string_printing(buffer)); | |
447d236c | 569 | *pass_message = TRUE; |
0756eb3c PH |
570 | *yield = buffer[0]; |
571 | return TRUE; | |
572 | } | |
573 | ||
574 | /* No data was read. If there is no errno, this must be the EOF (i.e. | |
19b9dc85 PH |
575 | connection closed) case, which causes deferral. An explicit connection reset |
576 | error has the same effect. Otherwise, put the host's identity in the message, | |
577 | leaving the errno value to be interpreted as well. In all cases, we have to | |
578 | assume the connection is now dead. */ | |
0756eb3c | 579 | |
19b9dc85 | 580 | if (*errno_value == 0 || *errno_value == ECONNRESET) |
0756eb3c PH |
581 | { |
582 | *errno_value = ERRNO_SMTPCLOSED; | |
c562fd30 | 583 | *message = US string_sprintf("Remote host closed connection " |
02b41d71 | 584 | "in response to %s%s", pl, smtp_command); |
0756eb3c | 585 | } |
de6273b4 JH |
586 | else |
587 | *message = US string_sprintf("%s [%s]", host->name, host->address); | |
0756eb3c PH |
588 | |
589 | return FALSE; | |
590 | } | |
591 | ||
592 | ||
593 | ||
594 | /************************************************* | |
595 | * Write error message to logs * | |
596 | *************************************************/ | |
597 | ||
598 | /* This writes to the main log and to the message log. | |
599 | ||
600 | Arguments: | |
601 | addr the address item containing error information | |
602 | host the current host | |
603 | ||
604 | Returns: nothing | |
605 | */ | |
606 | ||
607 | static void | |
608 | write_logs(address_item *addr, host_item *host) | |
609 | { | |
584ddd64 JH |
610 | uschar * message = LOGGING(outgoing_port) |
611 | ? string_sprintf("H=%s [%s]:%d", host->name, host->address, | |
612 | host->port == PORT_NONE ? 25 : host->port) | |
613 | : string_sprintf("H=%s [%s]", host->name, host->address); | |
c562fd30 JH |
614 | |
615 | if (addr->message) | |
0756eb3c | 616 | { |
c562fd30 | 617 | message = string_sprintf("%s: %s", message, addr->message); |
0756eb3c PH |
618 | if (addr->basic_errno > 0) |
619 | message = string_sprintf("%s: %s", message, strerror(addr->basic_errno)); | |
620 | log_write(0, LOG_MAIN, "%s", message); | |
621 | deliver_msglog("%s %s\n", tod_stamp(tod_log), message); | |
622 | } | |
623 | else | |
624 | { | |
37f3dc43 JH |
625 | const uschar * s = exim_errstr(addr->basic_errno); |
626 | log_write(0, LOG_MAIN, "%s %s", message, s); | |
627 | deliver_msglog("%s %s %s\n", tod_stamp(tod_log), message, s); | |
0756eb3c PH |
628 | } |
629 | } | |
630 | ||
c562fd30 JH |
631 | static void |
632 | msglog_line(host_item * host, uschar * message) | |
633 | { | |
37f3dc43 JH |
634 | deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log), |
635 | host->name, host->address, message); | |
c562fd30 JH |
636 | } |
637 | ||
0756eb3c PH |
638 | |
639 | ||
0cbf2b82 | 640 | #ifndef DISABLE_EVENT |
d68218c7 JH |
641 | /************************************************* |
642 | * Post-defer action * | |
643 | *************************************************/ | |
644 | ||
645 | /* This expands an arbitrary per-transport string. | |
646 | It might, for example, be used to write to the database log. | |
647 | ||
648 | Arguments: | |
d68218c7 JH |
649 | addr the address item containing error information |
650 | host the current host | |
651 | ||
652 | Returns: nothing | |
653 | */ | |
654 | ||
655 | static void | |
774ef2d7 | 656 | deferred_event_raise(address_item *addr, host_item *host) |
d68218c7 | 657 | { |
774ef2d7 | 658 | uschar * action = addr->transport->event_action; |
55414b25 | 659 | const uschar * save_domain; |
a7538db1 JH |
660 | uschar * save_local; |
661 | ||
d68218c7 | 662 | if (!action) |
a7538db1 | 663 | return; |
d68218c7 | 664 | |
a7538db1 JH |
665 | save_domain = deliver_domain; |
666 | save_local = deliver_localpart; | |
667 | ||
668 | /*XXX would ip & port already be set up? */ | |
669 | deliver_host_address = string_copy(host->address); | |
774ef2d7 JH |
670 | deliver_host_port = host->port == PORT_NONE ? 25 : host->port; |
671 | event_defer_errno = addr->basic_errno; | |
d68218c7 JH |
672 | |
673 | router_name = addr->router->name; | |
674 | transport_name = addr->transport->name; | |
a7538db1 JH |
675 | deliver_domain = addr->domain; |
676 | deliver_localpart = addr->local_part; | |
677 | ||
774ef2d7 | 678 | (void) event_raise(action, US"msg:host:defer", |
a7538db1 JH |
679 | addr->message |
680 | ? addr->basic_errno > 0 | |
681 | ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno)) | |
682 | : string_copy(addr->message) | |
683 | : addr->basic_errno > 0 | |
684 | ? string_copy(US strerror(addr->basic_errno)) | |
685 | : NULL); | |
686 | ||
687 | deliver_localpart = save_local; | |
688 | deliver_domain = save_domain; | |
d68218c7 JH |
689 | router_name = transport_name = NULL; |
690 | } | |
691 | #endif | |
692 | ||
0756eb3c PH |
693 | /************************************************* |
694 | * Synchronize SMTP responses * | |
695 | *************************************************/ | |
696 | ||
697 | /* This function is called from smtp_deliver() to receive SMTP responses from | |
698 | the server, and match them up with the commands to which they relate. When | |
699 | PIPELINING is not in use, this function is called after every command, and is | |
700 | therefore somewhat over-engineered, but it is simpler to use a single scheme | |
701 | that works both with and without PIPELINING instead of having two separate sets | |
702 | of code. | |
703 | ||
704 | The set of commands that are buffered up with pipelining may start with MAIL | |
705 | and may end with DATA; in between are RCPT commands that correspond to the | |
706 | addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH, | |
707 | etc.) are never buffered. | |
708 | ||
709 | Errors after MAIL or DATA abort the whole process leaving the response in the | |
710 | buffer. After MAIL, pending responses are flushed, and the original command is | |
711 | re-instated in big_buffer for error messages. For RCPT commands, the remote is | |
712 | permitted to reject some recipient addresses while accepting others. However | |
713 | certain errors clearly abort the whole process. Set the value in | |
714 | transport_return to PENDING_OK if the address is accepted. If there is a | |
715 | subsequent general error, it will get reset accordingly. If not, it will get | |
716 | converted to OK at the end. | |
717 | ||
718 | Arguments: | |
df5b41e3 | 719 | sx smtp connection context |
48c7f9e2 | 720 | count the number of responses to read |
48c7f9e2 PH |
721 | pending_DATA 0 if last command sent was not DATA |
722 | +1 if previously had a good recipient | |
723 | -1 if not previously had a good recipient | |
0756eb3c PH |
724 | |
725 | Returns: 3 if at least one address had 2xx and one had 5xx | |
726 | 2 if at least one address had 5xx but none had 2xx | |
727 | 1 if at least one host had a 2xx response, but none had 5xx | |
728 | 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA) | |
729 | -1 timeout while reading RCPT response | |
730 | -2 I/O or other non-response error for RCPT | |
731 | -3 DATA or MAIL failed - errno and buffer set | |
732 | */ | |
733 | ||
734 | static int | |
df5b41e3 | 735 | sync_responses(smtp_context * sx, int count, int pending_DATA) |
0756eb3c | 736 | { |
df5b41e3 | 737 | address_item *addr = sx->sync_addr; |
e9166683 JH |
738 | smtp_transport_options_block *ob = |
739 | (smtp_transport_options_block *)sx->tblock->options_block; | |
0756eb3c PH |
740 | int yield = 0; |
741 | ||
742 | /* Handle the response for a MAIL command. On error, reinstate the original | |
743 | command in big_buffer for error message use, and flush any further pending | |
744 | responses before returning, except after I/O errors and timeouts. */ | |
745 | ||
df5b41e3 | 746 | if (sx->pending_MAIL) |
0756eb3c PH |
747 | { |
748 | count--; | |
e9166683 JH |
749 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
750 | '2', ob->command_timeout)) | |
0756eb3c | 751 | { |
e027f545 | 752 | DEBUG(D_transport) debug_printf("bad response for MAIL\n"); |
0756eb3c | 753 | Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */ |
df5b41e3 | 754 | if (errno == 0 && sx->buffer[0] != 0) |
0756eb3c PH |
755 | { |
756 | uschar flushbuffer[4096]; | |
e97957bc | 757 | int save_errno = 0; |
df5b41e3 | 758 | if (sx->buffer[0] == '4') |
e97957bc PH |
759 | { |
760 | save_errno = ERRNO_MAIL4XX; | |
df5b41e3 | 761 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc | 762 | } |
0756eb3c PH |
763 | while (count-- > 0) |
764 | { | |
df5b41e3 | 765 | if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer), |
e9166683 | 766 | '2', ob->command_timeout) |
0756eb3c PH |
767 | && (errno != 0 || flushbuffer[0] == 0)) |
768 | break; | |
769 | } | |
e97957bc | 770 | errno = save_errno; |
0756eb3c | 771 | } |
c562fd30 JH |
772 | |
773 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
774 | while (count-- > 0) /* Mark any pending addrs with the host used */ | |
775 | { | |
776 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
df5b41e3 | 777 | addr->host_used = sx->host; |
c562fd30 JH |
778 | addr = addr->next; |
779 | } | |
0756eb3c PH |
780 | return -3; |
781 | } | |
782 | } | |
783 | ||
784 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
785 | ||
786 | /* Read and handle the required number of RCPT responses, matching each one up | |
787 | with an address by scanning for the next address whose status is PENDING_DEFER. | |
788 | */ | |
789 | ||
790 | while (count-- > 0) | |
791 | { | |
792 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
793 | ||
794 | /* The address was accepted */ | |
df5b41e3 | 795 | addr->host_used = sx->host; |
0756eb3c | 796 | |
e9166683 JH |
797 | if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
798 | '2', ob->command_timeout)) | |
0756eb3c PH |
799 | { |
800 | yield |= 1; | |
801 | addr->transport_return = PENDING_OK; | |
802 | ||
803 | /* If af_dr_retry_exists is set, there was a routing delay on this address; | |
09945f1e PH |
804 | ensure that any address-specific retry record is expunged. We do this both |
805 | for the basic key and for the version that also includes the sender. */ | |
0756eb3c PH |
806 | |
807 | if (testflag(addr, af_dr_retry_exists)) | |
09945f1e PH |
808 | { |
809 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, | |
810 | sender_address); | |
811 | retry_add_item(addr, altkey, rf_delete); | |
0756eb3c | 812 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
09945f1e | 813 | } |
0756eb3c PH |
814 | } |
815 | ||
816 | /* Timeout while reading the response */ | |
817 | ||
818 | else if (errno == ETIMEDOUT) | |
819 | { | |
c562fd30 | 820 | uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>", |
e9166683 | 821 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
df5b41e3 | 822 | set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE); |
0756eb3c | 823 | retry_add_item(addr, addr->address_retry_key, 0); |
f6c332bd | 824 | update_waiting = FALSE; |
0756eb3c PH |
825 | return -1; |
826 | } | |
827 | ||
828 | /* Handle other errors in obtaining an SMTP response by returning -1. This | |
829 | will cause all the addresses to be deferred. Restore the SMTP command in | |
830 | big_buffer for which we are checking the response, so the error message | |
831 | makes sense. */ | |
832 | ||
df5b41e3 | 833 | else if (errno != 0 || sx->buffer[0] == 0) |
0756eb3c PH |
834 | { |
835 | string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>", | |
df5b41e3 | 836 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
0756eb3c PH |
837 | return -2; |
838 | } | |
839 | ||
840 | /* Handle SMTP permanent and temporary response codes. */ | |
841 | ||
842 | else | |
843 | { | |
844 | addr->message = | |
447d236c | 845 | string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: " |
df5b41e3 JH |
846 | "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes), |
847 | string_printing(sx->buffer)); | |
447d236c | 848 | setflag(addr, af_pass_message); |
e9166683 JH |
849 | if (!sx->verify) |
850 | msglog_line(sx->host, addr->message); | |
0756eb3c PH |
851 | |
852 | /* The response was 5xx */ | |
853 | ||
df5b41e3 | 854 | if (sx->buffer[0] == '5') |
0756eb3c PH |
855 | { |
856 | addr->transport_return = FAIL; | |
857 | yield |= 2; | |
858 | } | |
859 | ||
860 | /* The response was 4xx */ | |
861 | ||
862 | else | |
863 | { | |
0756eb3c PH |
864 | addr->transport_return = DEFER; |
865 | addr->basic_errno = ERRNO_RCPT4XX; | |
df5b41e3 | 866 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
0756eb3c | 867 | |
e9166683 JH |
868 | if (!sx->verify) |
869 | { | |
0cbf2b82 | 870 | #ifndef DISABLE_EVENT |
e9166683 JH |
871 | event_defer_errno = addr->more_errno; |
872 | msg_event_raise(US"msg:rcpt:host:defer", addr); | |
5ef5dd52 JB |
873 | #endif |
874 | ||
e9166683 JH |
875 | /* Log temporary errors if there are more hosts to be tried. |
876 | If not, log this last one in the == line. */ | |
0756eb3c | 877 | |
e9166683 JH |
878 | if (sx->host->next) |
879 | log_write(0, LOG_MAIN, "H=%s [%s]: %s", | |
880 | sx->host->name, sx->host->address, addr->message); | |
0756eb3c | 881 | |
0cbf2b82 | 882 | #ifndef DISABLE_EVENT |
e9166683 JH |
883 | else |
884 | msg_event_raise(US"msg:rcpt:defer", addr); | |
5ef5dd52 JB |
885 | #endif |
886 | ||
e9166683 JH |
887 | /* Do not put this message on the list of those waiting for specific |
888 | hosts, as otherwise it is likely to be tried too often. */ | |
0756eb3c | 889 | |
e9166683 | 890 | update_waiting = FALSE; |
0756eb3c | 891 | |
e9166683 JH |
892 | /* Add a retry item for the address so that it doesn't get tried again |
893 | too soon. If address_retry_include_sender is true, add the sender address | |
894 | to the retry key. */ | |
0756eb3c | 895 | |
e9166683 JH |
896 | retry_add_item(addr, |
897 | ob->address_retry_include_sender | |
898 | ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address) | |
899 | : addr->address_retry_key, | |
900 | 0); | |
901 | } | |
0756eb3c PH |
902 | } |
903 | } | |
904 | } /* Loop for next RCPT response */ | |
905 | ||
906 | /* Update where to start at for the next block of responses, unless we | |
907 | have already handled all the addresses. */ | |
908 | ||
e9166683 | 909 | if (addr) sx->sync_addr = addr->next; |
0756eb3c PH |
910 | |
911 | /* Handle a response to DATA. If we have not had any good recipients, either | |
912 | previously or in this block, the response is ignored. */ | |
913 | ||
914 | if (pending_DATA != 0 && | |
e9166683 JH |
915 | !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
916 | '3', ob->command_timeout)) | |
0756eb3c PH |
917 | { |
918 | int code; | |
919 | uschar *msg; | |
447d236c | 920 | BOOL pass_message; |
e97957bc PH |
921 | if (pending_DATA > 0 || (yield & 1) != 0) |
922 | { | |
df5b41e3 | 923 | if (errno == 0 && sx->buffer[0] == '4') |
e97957bc PH |
924 | { |
925 | errno = ERRNO_DATA4XX; | |
df5b41e3 | 926 | sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc PH |
927 | } |
928 | return -3; | |
929 | } | |
df5b41e3 | 930 | (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message); |
0756eb3c PH |
931 | DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining " |
932 | "is in use and there were no good recipients\n", msg); | |
933 | } | |
934 | ||
935 | /* All responses read and handled; MAIL (if present) received 2xx and DATA (if | |
936 | present) received 3xx. If any RCPTs were handled and yielded anything other | |
937 | than 4xx, yield will be set non-zero. */ | |
938 | ||
939 | return yield; | |
940 | } | |
941 | ||
942 | ||
943 | ||
fcc8e047 JH |
944 | /* Do the client side of smtp-level authentication */ |
945 | /* | |
946 | Arguments: | |
947 | buffer EHLO response from server (gets overwritten) | |
948 | addrlist chain of potential addresses to deliver | |
949 | host host to deliver to | |
950 | ob transport options | |
951 | ibp, obp comms channel control blocks | |
952 | ||
953 | Returns: | |
954 | OK Success, or failed (but not required): global "smtp_authenticated" set | |
955 | DEFER Failed authentication (and was required) | |
956 | ERROR Internal problem | |
957 | ||
958 | FAIL_SEND Failed communications - transmit | |
959 | FAIL - response | |
960 | */ | |
961 | ||
962 | int | |
963 | smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host, | |
964 | smtp_transport_options_block *ob, BOOL is_esmtp, | |
965 | smtp_inblock *ibp, smtp_outblock *obp) | |
966 | { | |
a7538db1 JH |
967 | int require_auth; |
968 | uschar *fail_reason = US"server did not advertise AUTH support"; | |
fcc8e047 | 969 | |
a7538db1 JH |
970 | smtp_authenticated = FALSE; |
971 | client_authenticator = client_authenticated_id = client_authenticated_sender = NULL; | |
5130845b | 972 | require_auth = verify_check_given_host(&ob->hosts_require_auth, host); |
fcc8e047 | 973 | |
a7538db1 JH |
974 | if (is_esmtp && !regex_AUTH) regex_AUTH = |
975 | regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)", | |
976 | FALSE, TRUE); | |
fcc8e047 | 977 | |
a7538db1 JH |
978 | if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1)) |
979 | { | |
980 | uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
981 | expand_nmax = -1; /* reset */ | |
fcc8e047 | 982 | |
a7538db1 JH |
983 | /* Must not do this check until after we have saved the result of the |
984 | regex match above. */ | |
fcc8e047 | 985 | |
a7538db1 | 986 | if (require_auth == OK || |
5130845b | 987 | verify_check_given_host(&ob->hosts_try_auth, host) == OK) |
a7538db1 JH |
988 | { |
989 | auth_instance *au; | |
990 | fail_reason = US"no common mechanisms were found"; | |
fcc8e047 | 991 | |
a7538db1 | 992 | DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n"); |
fcc8e047 | 993 | |
a7538db1 JH |
994 | /* Scan the configured authenticators looking for one which is configured |
995 | for use as a client, which is not suppressed by client_condition, and | |
996 | whose name matches an authentication mechanism supported by the server. | |
997 | If one is found, attempt to authenticate by calling its client function. | |
998 | */ | |
fcc8e047 | 999 | |
a7538db1 JH |
1000 | for (au = auths; !smtp_authenticated && au != NULL; au = au->next) |
1001 | { | |
1002 | uschar *p = names; | |
1003 | if (!au->client || | |
1004 | (au->client_condition != NULL && | |
1005 | !expand_check_condition(au->client_condition, au->name, | |
1006 | US"client authenticator"))) | |
1007 | { | |
1008 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1009 | au->name, | |
1010 | (au->client)? "client_condition is false" : | |
1011 | "not configured as a client"); | |
1012 | continue; | |
1013 | } | |
fcc8e047 | 1014 | |
a7538db1 | 1015 | /* Loop to scan supported server mechanisms */ |
fcc8e047 | 1016 | |
a7538db1 JH |
1017 | while (*p != 0) |
1018 | { | |
1019 | int rc; | |
1020 | int len = Ustrlen(au->public_name); | |
1021 | while (isspace(*p)) p++; | |
fcc8e047 | 1022 | |
a7538db1 JH |
1023 | if (strncmpic(au->public_name, p, len) != 0 || |
1024 | (p[len] != 0 && !isspace(p[len]))) | |
1025 | { | |
1026 | while (*p != 0 && !isspace(*p)) p++; | |
1027 | continue; | |
1028 | } | |
fcc8e047 | 1029 | |
a7538db1 JH |
1030 | /* Found data for a listed mechanism. Call its client entry. Set |
1031 | a flag in the outblock so that data is overwritten after sending so | |
1032 | that reflections don't show it. */ | |
fcc8e047 | 1033 | |
a7538db1 JH |
1034 | fail_reason = US"authentication attempt(s) failed"; |
1035 | obp->authenticating = TRUE; | |
1036 | rc = (au->info->clientcode)(au, ibp, obp, | |
1037 | ob->command_timeout, buffer, bufsize); | |
1038 | obp->authenticating = FALSE; | |
1039 | DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n", | |
1040 | au->name, rc); | |
fcc8e047 | 1041 | |
a7538db1 JH |
1042 | /* A temporary authentication failure must hold up delivery to |
1043 | this host. After a permanent authentication failure, we carry on | |
1044 | to try other authentication methods. If all fail hard, try to | |
1045 | deliver the message unauthenticated unless require_auth was set. */ | |
fcc8e047 | 1046 | |
a7538db1 JH |
1047 | switch(rc) |
1048 | { | |
1049 | case OK: | |
1050 | smtp_authenticated = TRUE; /* stops the outer loop */ | |
1051 | client_authenticator = au->name; | |
1052 | if (au->set_client_id != NULL) | |
1053 | client_authenticated_id = expand_string(au->set_client_id); | |
1054 | break; | |
1055 | ||
1056 | /* Failure after writing a command */ | |
1057 | ||
1058 | case FAIL_SEND: | |
1059 | return FAIL_SEND; | |
1060 | ||
1061 | /* Failure after reading a response */ | |
1062 | ||
1063 | case FAIL: | |
1064 | if (errno != 0 || buffer[0] != '5') return FAIL; | |
1065 | log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s", | |
1066 | au->name, host->name, host->address, buffer); | |
1067 | break; | |
1068 | ||
1069 | /* Failure by some other means. In effect, the authenticator | |
1070 | decided it wasn't prepared to handle this case. Typically this | |
1071 | is the result of "fail" in an expansion string. Do we need to | |
1072 | log anything here? Feb 2006: a message is now put in the buffer | |
1073 | if logging is required. */ | |
1074 | ||
1075 | case CANCELLED: | |
1076 | if (*buffer != 0) | |
1077 | log_write(0, LOG_MAIN, "%s authenticator cancelled " | |
1078 | "authentication H=%s [%s] %s", au->name, host->name, | |
1079 | host->address, buffer); | |
1080 | break; | |
1081 | ||
1082 | /* Internal problem, message in buffer. */ | |
1083 | ||
1084 | case ERROR: | |
895fbaf2 JH |
1085 | set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer), |
1086 | DEFER, FALSE); | |
a7538db1 JH |
1087 | return ERROR; |
1088 | } | |
fcc8e047 | 1089 | |
a7538db1 JH |
1090 | break; /* If not authenticated, try next authenticator */ |
1091 | } /* Loop for scanning supported server mechanisms */ | |
1092 | } /* Loop for further authenticators */ | |
fcc8e047 | 1093 | } |
a7538db1 | 1094 | } |
fcc8e047 | 1095 | |
a7538db1 | 1096 | /* If we haven't authenticated, but are required to, give up. */ |
fcc8e047 | 1097 | |
a7538db1 JH |
1098 | if (require_auth == OK && !smtp_authenticated) |
1099 | { | |
895fbaf2 | 1100 | set_errno_nohost(addrlist, ERRNO_AUTHFAIL, |
a7538db1 | 1101 | string_sprintf("authentication required but %s", fail_reason), DEFER, |
895fbaf2 | 1102 | FALSE); |
a7538db1 JH |
1103 | return DEFER; |
1104 | } | |
4d8d62b9 | 1105 | |
a7538db1 | 1106 | return OK; |
fcc8e047 JH |
1107 | } |
1108 | ||
1109 | ||
1110 | /* Construct AUTH appendix string for MAIL TO */ | |
1111 | /* | |
1112 | Arguments | |
1113 | buffer to build string | |
1114 | addrlist chain of potential addresses to deliver | |
1115 | ob transport options | |
1116 | ||
1117 | Globals smtp_authenticated | |
1118 | client_authenticated_sender | |
1119 | Return True on error, otherwise buffer has (possibly empty) terminated string | |
1120 | */ | |
1121 | ||
1122 | BOOL | |
1123 | smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist, | |
1124 | smtp_transport_options_block *ob) | |
1125 | { | |
1126 | uschar *local_authenticated_sender = authenticated_sender; | |
1127 | ||
1128 | #ifdef notdef | |
1129 | debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N"); | |
1130 | #endif | |
1131 | ||
1132 | if (ob->authenticated_sender != NULL) | |
1133 | { | |
1134 | uschar *new = expand_string(ob->authenticated_sender); | |
1135 | if (new == NULL) | |
1136 | { | |
1137 | if (!expand_string_forcedfail) | |
1138 | { | |
1139 | uschar *message = string_sprintf("failed to expand " | |
1140 | "authenticated_sender: %s", expand_string_message); | |
895fbaf2 | 1141 | set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
fcc8e047 JH |
1142 | return TRUE; |
1143 | } | |
1144 | } | |
1145 | else if (new[0] != 0) local_authenticated_sender = new; | |
1146 | } | |
1147 | ||
1148 | /* Add the authenticated sender address if present */ | |
1149 | ||
1150 | if ((smtp_authenticated || ob->authenticated_sender_force) && | |
1151 | local_authenticated_sender != NULL) | |
1152 | { | |
1153 | string_format(buffer, bufsize, " AUTH=%s", | |
1154 | auth_xtextencode(local_authenticated_sender, | |
1155 | Ustrlen(local_authenticated_sender))); | |
1156 | client_authenticated_sender = string_copy(local_authenticated_sender); | |
1157 | } | |
1158 | else | |
1159 | *buffer= 0; | |
1160 | ||
1161 | return FALSE; | |
1162 | } | |
1163 | ||
1164 | ||
1165 | ||
0e66b3b6 | 1166 | #ifdef EXPERIMENTAL_DANE |
2d5fdd53 JH |
1167 | /* Lookup TLSA record for host/port. |
1168 | Return: OK success with dnssec; DANE mode | |
1169 | DEFER Do not use this host now, may retry later | |
1170 | FAIL_FORCED No TLSA record; DANE not usable | |
1171 | FAIL Do not use this connection | |
1172 | */ | |
1173 | ||
0e66b3b6 | 1174 | int |
4b0fe319 | 1175 | tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required) |
0e66b3b6 JH |
1176 | { |
1177 | /* move this out to host.c given the similarity to dns_lookup() ? */ | |
1178 | uschar buffer[300]; | |
55414b25 | 1179 | const uschar * fullname = buffer; |
0e66b3b6 JH |
1180 | |
1181 | /* TLSA lookup string */ | |
1182 | (void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name); | |
1183 | ||
1184 | switch (dns_lookup(dnsa, buffer, T_TLSA, &fullname)) | |
1185 | { | |
0e66b3b6 JH |
1186 | case DNS_SUCCEED: |
1187 | if (!dns_is_secure(dnsa)) | |
1188 | { | |
1189 | log_write(0, LOG_MAIN, "DANE error: TLSA lookup not DNSSEC"); | |
1190 | return DEFER; | |
1191 | } | |
4b0fe319 | 1192 | return OK; |
2d5fdd53 JH |
1193 | |
1194 | case DNS_AGAIN: | |
1195 | return DEFER; /* just defer this TLS'd conn */ | |
1196 | ||
ef3a1a30 JH |
1197 | case DNS_NODATA: /* no TLSA RR for this lookup */ |
1198 | case DNS_NOMATCH: /* no records at all for this lookup */ | |
2d5fdd53 JH |
1199 | return dane_required ? FAIL : FAIL_FORCED; |
1200 | ||
1201 | default: | |
1202 | case DNS_FAIL: | |
1203 | return dane_required ? FAIL : DEFER; | |
0e66b3b6 | 1204 | } |
0e66b3b6 JH |
1205 | } |
1206 | #endif | |
1207 | ||
1208 | ||
a39bd74d JB |
1209 | |
1210 | typedef struct smtp_compare_s | |
1211 | { | |
1212 | uschar *current_sender_address; | |
1213 | struct transport_instance *tblock; | |
1214 | } smtp_compare_t; | |
1215 | ||
d093f8e5 JH |
1216 | |
1217 | /* Create a unique string that identifies this message, it is based on | |
1218 | sender_address, helo_data and tls_certificate if enabled. | |
1219 | */ | |
a39bd74d JB |
1220 | |
1221 | static uschar * | |
1222 | smtp_local_identity(uschar * sender, struct transport_instance * tblock) | |
1223 | { | |
1224 | address_item * addr1; | |
1225 | uschar * if1 = US""; | |
1226 | uschar * helo1 = US""; | |
1227 | #ifdef SUPPORT_TLS | |
1228 | uschar * tlsc1 = US""; | |
1229 | #endif | |
1230 | uschar * save_sender_address = sender_address; | |
1231 | uschar * local_identity = NULL; | |
1232 | smtp_transport_options_block * ob = | |
1233 | (smtp_transport_options_block *)tblock->options_block; | |
1234 | ||
1235 | sender_address = sender; | |
1236 | ||
1237 | addr1 = deliver_make_addr (sender, TRUE); | |
1238 | deliver_set_expansions(addr1); | |
1239 | ||
1240 | if (ob->interface) | |
1241 | if1 = expand_string(ob->interface); | |
1242 | ||
1243 | if (ob->helo_data) | |
1244 | helo1 = expand_string(ob->helo_data); | |
1245 | ||
1246 | #ifdef SUPPORT_TLS | |
1247 | if (ob->tls_certificate) | |
1248 | tlsc1 = expand_string(ob->tls_certificate); | |
1249 | local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1); | |
1250 | #else | |
1251 | local_identity = string_sprintf ("%s^%s", if1, helo1); | |
1252 | #endif | |
1253 | ||
1254 | deliver_set_expansions(NULL); | |
1255 | sender_address = save_sender_address; | |
1256 | ||
1257 | return local_identity; | |
1258 | } | |
1259 | ||
1260 | ||
1261 | ||
1262 | /* This routine is a callback that is called from transport_check_waiting. | |
1263 | This function will evaluate the incoming message versus the previous | |
1264 | message. If the incoming message is using a different local identity then | |
1265 | we will veto this new message. */ | |
1266 | ||
1267 | static BOOL | |
1268 | smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare) | |
1269 | { | |
dadff1d4 HSHR |
1270 | uschar * message_local_identity, |
1271 | * current_local_identity, | |
1272 | * new_sender_address; | |
1273 | ||
1274 | current_local_identity = | |
a39bd74d | 1275 | smtp_local_identity(s_compare->current_sender_address, s_compare->tblock); |
a39bd74d | 1276 | |
dadff1d4 HSHR |
1277 | if (!(new_sender_address = deliver_get_sender_address(message_id))) |
1278 | return 0; | |
1279 | ||
1280 | message_local_identity = | |
1281 | smtp_local_identity(new_sender_address, s_compare->tblock); | |
a39bd74d JB |
1282 | |
1283 | return Ustrcmp(current_local_identity, message_local_identity) == 0; | |
1284 | } | |
1285 | ||
1286 | ||
1287 | ||
e9166683 JH |
1288 | static uschar |
1289 | ehlo_response(uschar * buf, uschar checks) | |
9094b84b | 1290 | { |
e9166683 JH |
1291 | size_t bsize = Ustrlen(buf); |
1292 | ||
9094b84b | 1293 | #ifdef SUPPORT_TLS |
ff5aac2b JH |
1294 | if ( checks & PEER_OFFERED_TLS |
1295 | && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1296 | checks &= ~PEER_OFFERED_TLS; | |
9094b84b JH |
1297 | #endif |
1298 | ||
ff5aac2b JH |
1299 | if ( checks & PEER_OFFERED_IGNQ |
1300 | && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0, | |
1301 | PCRE_EOPT, NULL, 0) < 0) | |
1302 | checks &= ~PEER_OFFERED_IGNQ; | |
9094b84b | 1303 | |
f98442df JH |
1304 | if ( checks & PEER_OFFERED_CHUNKING |
1305 | && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1306 | checks &= ~PEER_OFFERED_CHUNKING; | |
1307 | ||
9094b84b | 1308 | #ifndef DISABLE_PRDR |
ff5aac2b JH |
1309 | if ( checks & PEER_OFFERED_PRDR |
1310 | && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1311 | checks &= ~PEER_OFFERED_PRDR; | |
9094b84b JH |
1312 | #endif |
1313 | ||
1314 | #ifdef SUPPORT_I18N | |
ff5aac2b JH |
1315 | if ( checks & PEER_OFFERED_UTF8 |
1316 | && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1317 | checks &= ~PEER_OFFERED_UTF8; | |
9094b84b JH |
1318 | #endif |
1319 | ||
ff5aac2b JH |
1320 | if ( checks & PEER_OFFERED_DSN |
1321 | && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1322 | checks &= ~PEER_OFFERED_DSN; | |
9094b84b | 1323 | |
ff5aac2b JH |
1324 | if ( checks & PEER_OFFERED_PIPE |
1325 | && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0, | |
1326 | PCRE_EOPT, NULL, 0) < 0) | |
1327 | checks &= ~PEER_OFFERED_PIPE; | |
9094b84b | 1328 | |
ff5aac2b JH |
1329 | if ( checks & PEER_OFFERED_SIZE |
1330 | && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1331 | checks &= ~PEER_OFFERED_SIZE; | |
9094b84b JH |
1332 | |
1333 | return checks; | |
1334 | } | |
1335 | ||
1336 | ||
6d5c916c JH |
1337 | |
1338 | /* Callback for emitting a BDAT data chunk header. | |
6d5c916c | 1339 | |
e027f545 JH |
1340 | If given a nonzero size, first flush any buffered SMTP commands |
1341 | then emit the command. | |
1342 | ||
1343 | Reap previous SMTP command responses if requested. | |
1344 | Reap one SMTP command response if requested. | |
6d5c916c JH |
1345 | |
1346 | Returns: OK or ERROR | |
1347 | */ | |
1348 | ||
1349 | static int | |
1350 | smtp_chunk_cmd_callback(int fd, transport_ctx * tctx, | |
e027f545 | 1351 | unsigned chunk_size, unsigned flags) |
6d5c916c JH |
1352 | { |
1353 | smtp_transport_options_block * ob = | |
1354 | (smtp_transport_options_block *)(tctx->tblock->options_block); | |
e9166683 | 1355 | smtp_context * sx = tctx->smtp_context; |
e027f545 JH |
1356 | int cmd_count = 0; |
1357 | int prev_cmd_count; | |
6d5c916c | 1358 | |
e027f545 | 1359 | /* Write SMTP chunk header command */ |
6d5c916c | 1360 | |
e027f545 | 1361 | if (chunk_size > 0) |
87cb4a16 | 1362 | { |
e9166683 | 1363 | if((cmd_count = smtp_write_command(&sx->outblock, FALSE, "BDAT %u%s\r\n", |
e027f545 JH |
1364 | chunk_size, |
1365 | flags & tc_chunk_last ? " LAST" : "") | |
1366 | ) < 0) return ERROR; | |
87cb4a16 JH |
1367 | if (flags & tc_chunk_last) |
1368 | data_command = string_copy(big_buffer); /* Save for later error message */ | |
1369 | } | |
e027f545 | 1370 | |
e9166683 | 1371 | prev_cmd_count = cmd_count += sx->cmd_count; |
6d5c916c | 1372 | |
e027f545 | 1373 | /* Reap responses for any previous, but not one we just emitted */ |
6d5c916c | 1374 | |
e027f545 JH |
1375 | if (chunk_size > 0) |
1376 | prev_cmd_count--; | |
e9166683 | 1377 | if (sx->pending_BDAT) |
e027f545 | 1378 | prev_cmd_count--; |
6d5c916c | 1379 | |
e027f545 | 1380 | if (flags & tc_reap_prev && prev_cmd_count > 0) |
6d5c916c | 1381 | { |
58fc5fb2 JH |
1382 | DEBUG(D_transport) debug_printf("look for %d responses" |
1383 | " for previous pipelined cmds\n", prev_cmd_count); | |
6d5c916c | 1384 | |
e9166683 | 1385 | switch(sync_responses(sx, prev_cmd_count, 0)) |
e027f545 JH |
1386 | { |
1387 | case 1: /* 2xx (only) => OK */ | |
e9166683 JH |
1388 | case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */ |
1389 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e027f545 JH |
1390 | case 0: break; /* No 2xx or 5xx, but no probs */ |
1391 | ||
1392 | case -1: /* Timeout on RCPT */ | |
1393 | default: return ERROR; /* I/O error, or any MAIL/DATA error */ | |
1394 | } | |
1395 | cmd_count = 1; | |
e9166683 | 1396 | if (!sx->pending_BDAT) |
e027f545 | 1397 | pipelining_active = FALSE; |
6d5c916c | 1398 | } |
e027f545 | 1399 | |
58fc5fb2 | 1400 | /* Reap response for an outstanding BDAT */ |
e027f545 | 1401 | |
e9166683 | 1402 | if (sx->pending_BDAT) |
e027f545 | 1403 | { |
58fc5fb2 JH |
1404 | DEBUG(D_transport) debug_printf("look for one response for BDAT\n"); |
1405 | ||
e9166683 | 1406 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
e027f545 JH |
1407 | ob->command_timeout)) |
1408 | { | |
e9166683 | 1409 | if (errno == 0 && sx->buffer[0] == '4') |
e027f545 JH |
1410 | { |
1411 | errno = ERRNO_DATA4XX; /*XXX does this actually get used? */ | |
e9166683 JH |
1412 | sx->first_addr->more_errno |= |
1413 | ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
e027f545 JH |
1414 | } |
1415 | return ERROR; | |
1416 | } | |
1417 | cmd_count--; | |
e9166683 | 1418 | sx->pending_BDAT = FALSE; |
e027f545 JH |
1419 | pipelining_active = FALSE; |
1420 | } | |
1421 | else if (chunk_size > 0) | |
e9166683 | 1422 | sx->pending_BDAT = TRUE; |
e027f545 JH |
1423 | |
1424 | ||
e9166683 | 1425 | sx->cmd_count = cmd_count; |
e027f545 | 1426 | return OK; |
6d5c916c JH |
1427 | } |
1428 | ||
1429 | ||
1430 | ||
0756eb3c | 1431 | /************************************************* |
d093f8e5 | 1432 | * Make connection for given message * |
0756eb3c PH |
1433 | *************************************************/ |
1434 | ||
d093f8e5 JH |
1435 | /* |
1436 | Arguments: | |
1437 | ctx connection context | |
d093f8e5 JH |
1438 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for |
1439 | a second attempt after TLS initialization fails | |
d093f8e5 JH |
1440 | |
1441 | Returns: OK - the connection was made and the delivery attempted; | |
1442 | fd is set in the conn context, tls_out set up. | |
1443 | DEFER - the connection could not be made, or something failed | |
1444 | while setting up the SMTP session, or there was a | |
1445 | non-message-specific error, such as a timeout. | |
1446 | ERROR - helo_data or add_headers or authenticated_sender is | |
1447 | specified for this transport, and the string failed | |
1448 | to expand | |
1449 | */ | |
1450 | int | |
e9166683 | 1451 | smtp_setup_conn(smtp_context * sx, BOOL suppress_tls) |
d093f8e5 JH |
1452 | { |
1453 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) | |
1454 | dns_answer tlsa_dnsa; | |
1455 | #endif | |
1456 | BOOL pass_message = FALSE; | |
d093f8e5 | 1457 | uschar * message = NULL; |
d093f8e5 JH |
1458 | int yield = OK; |
1459 | int rc; | |
1460 | ||
02b41d71 | 1461 | sx->ob = (smtp_transport_options_block *) sx->tblock->options_block; |
d093f8e5 JH |
1462 | |
1463 | sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0; | |
1464 | sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0; | |
1465 | sx->ok = FALSE; | |
1466 | sx->send_rset = TRUE; | |
1467 | sx->send_quit = TRUE; | |
1468 | sx->setting_up = TRUE; | |
1469 | sx->esmtp = TRUE; | |
1470 | sx->esmtp_sent = FALSE; | |
59a286ef | 1471 | #ifdef SUPPORT_I18N |
d093f8e5 | 1472 | sx->utf8_needed = FALSE; |
59a286ef | 1473 | #endif |
d093f8e5 | 1474 | sx->dsn_all_lasthop = TRUE; |
59a286ef | 1475 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
d093f8e5 JH |
1476 | sx->dane = FALSE; |
1477 | sx->dane_required = verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK; | |
1478 | #endif | |
1479 | ||
1480 | if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999; | |
d093f8e5 JH |
1481 | sx->peer_offered = 0; |
1482 | sx->igquotstr = US""; | |
02b41d71 | 1483 | if (!sx->helo_data) sx->helo_data = sx->ob->helo_data; |
d093f8e5 JH |
1484 | #ifdef EXPERIMENTAL_DSN_INFO |
1485 | sx->smtp_greeting = NULL; | |
1486 | sx->helo_response = NULL; | |
59a286ef JH |
1487 | #endif |
1488 | ||
0756eb3c | 1489 | smtp_command = US"initial connection"; |
d093f8e5 | 1490 | sx->buffer[0] = '\0'; |
0756eb3c PH |
1491 | |
1492 | /* Set up the buffer for reading SMTP response packets. */ | |
1493 | ||
d093f8e5 JH |
1494 | sx->inblock.buffer = sx->inbuffer; |
1495 | sx->inblock.buffersize = sizeof(sx->inbuffer); | |
1496 | sx->inblock.ptr = sx->inbuffer; | |
1497 | sx->inblock.ptrend = sx->inbuffer; | |
0756eb3c PH |
1498 | |
1499 | /* Set up the buffer for holding SMTP commands while pipelining */ | |
1500 | ||
d093f8e5 JH |
1501 | sx->outblock.buffer = sx->outbuffer; |
1502 | sx->outblock.buffersize = sizeof(sx->outbuffer); | |
1503 | sx->outblock.ptr = sx->outbuffer; | |
1504 | sx->outblock.cmd_count = 0; | |
1505 | sx->outblock.authenticating = FALSE; | |
0756eb3c | 1506 | |
6c512171 PH |
1507 | /* Reset the parameters of a TLS session. */ |
1508 | ||
817d9f57 JH |
1509 | tls_out.bits = 0; |
1510 | tls_out.cipher = NULL; /* the one we may use for this transport */ | |
9d1c15ef JH |
1511 | tls_out.ourcert = NULL; |
1512 | tls_out.peercert = NULL; | |
817d9f57 JH |
1513 | tls_out.peerdn = NULL; |
1514 | #if defined(SUPPORT_TLS) && !defined(USE_GNUTLS) | |
1515 | tls_out.sni = NULL; | |
5b456975 | 1516 | #endif |
018058b2 | 1517 | tls_out.ocsp = OCSP_NOT_REQ; |
6c512171 | 1518 | |
35aba663 JH |
1519 | /* Flip the legacy TLS-related variables over to the outbound set in case |
1520 | they're used in the context of the transport. Don't bother resetting | |
02b41d71 JH |
1521 | afterward (when being used by a transport) as we're in a subprocess. |
1522 | For verify, unflipped once the callout is dealt with */ | |
35aba663 JH |
1523 | |
1524 | tls_modify_variables(&tls_out); | |
1525 | ||
061b7ebd | 1526 | #ifndef SUPPORT_TLS |
d093f8e5 | 1527 | if (sx->smtps) |
061b7ebd | 1528 | { |
d093f8e5 | 1529 | set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available", |
895fbaf2 | 1530 | DEFER, FALSE); |
018058b2 | 1531 | return ERROR; |
061b7ebd PP |
1532 | } |
1533 | #endif | |
1534 | ||
0756eb3c PH |
1535 | /* Make a connection to the host if this isn't a continued delivery, and handle |
1536 | the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled | |
1537 | specially so they can be identified for retries. */ | |
1538 | ||
1539 | if (continue_hostname == NULL) | |
1540 | { | |
e9166683 | 1541 | if (sx->verify) |
02b41d71 JH |
1542 | HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port); |
1543 | ||
a7538db1 | 1544 | /* This puts port into host->port */ |
d093f8e5 JH |
1545 | sx->inblock.sock = sx->outblock.sock = |
1546 | smtp_connect(sx->host, sx->host_af, sx->port, sx->interface, | |
1547 | sx->ob->connect_timeout, sx->tblock); | |
4311097e | 1548 | |
d093f8e5 | 1549 | if (sx->inblock.sock < 0) |
0756eb3c | 1550 | { |
02b41d71 | 1551 | uschar * msg = NULL; |
e9166683 | 1552 | if (sx->verify) |
02b41d71 JH |
1553 | { |
1554 | msg = strerror(errno); | |
1555 | HDEBUG(D_verify) debug_printf("connect: %s\n", msg); | |
1556 | } | |
1557 | set_errno_nohost(sx->addrlist, | |
829dd842 | 1558 | errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno, |
e9166683 | 1559 | sx->verify ? string_sprintf("could not connect: %s", msg) |
02b41d71 JH |
1560 | : NULL, |
1561 | DEFER, FALSE); | |
1562 | sx->send_quit = FALSE; | |
0756eb3c PH |
1563 | return DEFER; |
1564 | } | |
1565 | ||
0e66b3b6 JH |
1566 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
1567 | { | |
0e66b3b6 JH |
1568 | tls_out.dane_verified = FALSE; |
1569 | tls_out.tlsa_usage = 0; | |
1570 | ||
d093f8e5 | 1571 | if (sx->host->dnssec == DS_YES) |
0e66b3b6 | 1572 | { |
d093f8e5 JH |
1573 | if( sx->dane_required |
1574 | || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK | |
0e66b3b6 | 1575 | ) |
d093f8e5 | 1576 | switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required)) |
4b0fe319 | 1577 | { |
d093f8e5 | 1578 | case OK: sx->dane = TRUE; break; |
2d5fdd53 | 1579 | case FAIL_FORCED: break; |
d093f8e5 | 1580 | default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
2d5fdd53 JH |
1581 | string_sprintf("DANE error: tlsa lookup %s", |
1582 | rc == DEFER ? "DEFER" : "FAIL"), | |
1583 | rc, FALSE); | |
1584 | return rc; | |
4b0fe319 | 1585 | } |
0e66b3b6 | 1586 | } |
d093f8e5 | 1587 | else if (sx->dane_required) |
0e66b3b6 | 1588 | { |
d093f8e5 JH |
1589 | set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
1590 | string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name), | |
895fbaf2 | 1591 | FAIL, FALSE); |
4b0fe319 | 1592 | return FAIL; |
0e66b3b6 JH |
1593 | } |
1594 | ||
d093f8e5 JH |
1595 | if (sx->dane) |
1596 | sx->ob->tls_tempfail_tryclear = FALSE; | |
0e66b3b6 JH |
1597 | } |
1598 | #endif /*DANE*/ | |
1599 | ||
41c7c167 PH |
1600 | /* Expand the greeting message while waiting for the initial response. (Makes |
1601 | sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is | |
1602 | delayed till here so that $sending_interface and $sending_port are set. */ | |
1603 | ||
02b41d71 JH |
1604 | if (sx->helo_data) |
1605 | if (!(sx->helo_data = expand_string(sx->helo_data))) | |
e9166683 | 1606 | if (sx->verify) |
02b41d71 JH |
1607 | log_write(0, LOG_MAIN|LOG_PANIC, |
1608 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1609 | sx->addrlist->address, expand_string_message); | |
1610 | ||
8c5d388a | 1611 | #ifdef SUPPORT_I18N |
d093f8e5 | 1612 | if (sx->helo_data) |
810d16ad | 1613 | { |
02b41d71 JH |
1614 | expand_string_message = NULL; |
1615 | if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data, | |
1616 | &expand_string_message)), | |
1617 | expand_string_message) | |
e9166683 | 1618 | if (sx->verify) |
02b41d71 JH |
1619 | log_write(0, LOG_MAIN|LOG_PANIC, |
1620 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1621 | sx->addrlist->address, expand_string_message); | |
1622 | else | |
1623 | sx->helo_data = NULL; | |
810d16ad JH |
1624 | } |
1625 | #endif | |
41c7c167 | 1626 | |
0756eb3c PH |
1627 | /* The first thing is to wait for an initial OK response. The dreaded "goto" |
1628 | is nevertheless a reasonably clean way of programming this kind of logic, | |
1629 | where you want to escape on any error. */ | |
1630 | ||
d093f8e5 | 1631 | if (!sx->smtps) |
061b7ebd | 1632 | { |
8d330698 JH |
1633 | BOOL good_response; |
1634 | ||
1635 | #ifdef TCP_QUICKACK | |
d093f8e5 | 1636 | (void) setsockopt(sx->inblock.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off)); |
8d330698 | 1637 | #endif |
d093f8e5 JH |
1638 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1639 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1640 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1641 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
1642 | #endif |
1643 | if (!good_response) goto RESPONSE_FAILED; | |
0756eb3c | 1644 | |
0cbf2b82 | 1645 | #ifndef DISABLE_EVENT |
b30275b8 | 1646 | { |
805c9d53 | 1647 | uschar * s; |
d093f8e5 JH |
1648 | lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes" |
1649 | : sx->host->dnssec==DS_NO ? US"no" : NULL; | |
1650 | s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer); | |
b30275b8 | 1651 | if (s) |
a7538db1 | 1652 | { |
d093f8e5 | 1653 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, |
b30275b8 | 1654 | string_sprintf("deferred by smtp:connect event expansion: %s", s), |
895fbaf2 | 1655 | DEFER, FALSE); |
a7538db1 JH |
1656 | yield = DEFER; |
1657 | goto SEND_QUIT; | |
1658 | } | |
b30275b8 | 1659 | } |
a7538db1 JH |
1660 | #endif |
1661 | ||
061b7ebd PP |
1662 | /* Now check if the helo_data expansion went well, and sign off cleanly if |
1663 | it didn't. */ | |
41c7c167 | 1664 | |
d093f8e5 | 1665 | if (!sx->helo_data) |
061b7ebd | 1666 | { |
d093f8e5 | 1667 | message = string_sprintf("failed to expand helo_data: %s", |
061b7ebd | 1668 | expand_string_message); |
d093f8e5 | 1669 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
061b7ebd PP |
1670 | yield = DEFER; |
1671 | goto SEND_QUIT; | |
1672 | } | |
41c7c167 PH |
1673 | } |
1674 | ||
0756eb3c | 1675 | /** Debugging without sending a message |
d093f8e5 | 1676 | sx->addrlist->transport_return = DEFER; |
0756eb3c PH |
1677 | goto SEND_QUIT; |
1678 | **/ | |
1679 | ||
1680 | /* Errors that occur after this point follow an SMTP command, which is | |
1681 | left in big_buffer by smtp_write_command() for use in error messages. */ | |
1682 | ||
1683 | smtp_command = big_buffer; | |
1684 | ||
1685 | /* Tell the remote who we are... | |
1686 | ||
1687 | February 1998: A convention has evolved that ESMTP-speaking MTAs include the | |
1688 | string "ESMTP" in their greeting lines, so make Exim send EHLO if the | |
1689 | greeting is of this form. The assumption was that the far end supports it | |
1690 | properly... but experience shows that there are some that give 5xx responses, | |
1691 | even though the banner includes "ESMTP" (there's a bloody-minded one that | |
1692 | says "ESMTP not spoken here"). Cope with that case. | |
1693 | ||
1694 | September 2000: Time has passed, and it seems reasonable now to always send | |
1695 | EHLO at the start. It is also convenient to make the change while installing | |
1696 | the TLS stuff. | |
1697 | ||
1698 | July 2003: Joachim Wieland met a broken server that advertises "PIPELINING" | |
1699 | but times out after sending MAIL FROM, RCPT TO and DATA all together. There | |
1700 | would be no way to send out the mails, so there is now a host list | |
1701 | "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the | |
1702 | PIPELINING problem as well. Maybe it can also be useful to cure other | |
1703 | problems with broken servers. | |
1704 | ||
1705 | Exim originally sent "Helo" at this point and ran for nearly a year that way. | |
1706 | Then somebody tried it with a Microsoft mailer... It seems that all other | |
1707 | mailers use upper case for some reason (the RFC is quite clear about case | |
1708 | independence) so, for peace of mind, I gave in. */ | |
1709 | ||
d093f8e5 | 1710 | sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK; |
0756eb3c | 1711 | |
061b7ebd PP |
1712 | /* Alas; be careful, since this goto is not an error-out, so conceivably |
1713 | we might set data between here and the target which we assume to exist | |
1714 | and be usable. I can see this coming back to bite us. */ | |
a7538db1 | 1715 | #ifdef SUPPORT_TLS |
d093f8e5 | 1716 | if (sx->smtps) |
061b7ebd | 1717 | { |
2d14f397 | 1718 | smtp_peer_options |= PEER_OFFERED_TLS; |
061b7ebd | 1719 | suppress_tls = FALSE; |
d093f8e5 | 1720 | sx->ob->tls_tempfail_tryclear = FALSE; |
061b7ebd PP |
1721 | smtp_command = US"SSL-on-connect"; |
1722 | goto TLS_NEGOTIATE; | |
1723 | } | |
a7538db1 | 1724 | #endif |
061b7ebd | 1725 | |
d093f8e5 | 1726 | if (sx->esmtp) |
0756eb3c | 1727 | { |
d093f8e5 JH |
1728 | if (smtp_write_command(&sx->outblock, FALSE, "%s %s\r\n", |
1729 | sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0) | |
0756eb3c | 1730 | goto SEND_FAILED; |
d093f8e5 JH |
1731 | sx->esmtp_sent = TRUE; |
1732 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', | |
1733 | sx->ob->command_timeout)) | |
0756eb3c | 1734 | { |
d093f8e5 | 1735 | if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp) |
895fbaf2 JH |
1736 | { |
1737 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 1738 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
1739 | #endif |
1740 | goto RESPONSE_FAILED; | |
1741 | } | |
d093f8e5 | 1742 | sx->esmtp = FALSE; |
0756eb3c | 1743 | } |
895fbaf2 | 1744 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1745 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 | 1746 | #endif |
0756eb3c PH |
1747 | } |
1748 | else | |
0756eb3c PH |
1749 | DEBUG(D_transport) |
1750 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
0756eb3c | 1751 | |
d093f8e5 | 1752 | if (!sx->esmtp) |
0756eb3c | 1753 | { |
895fbaf2 | 1754 | BOOL good_response; |
d093f8e5 JH |
1755 | int n = sizeof(sx->buffer); |
1756 | uschar * rsp = sx->buffer; | |
a57ce043 | 1757 | |
d093f8e5 JH |
1758 | if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2) |
1759 | { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; } | |
895fbaf2 | 1760 | |
d093f8e5 | 1761 | if (smtp_write_command(&sx->outblock, FALSE, "HELO %s\r\n", sx->helo_data) < 0) |
0756eb3c | 1762 | goto SEND_FAILED; |
d093f8e5 JH |
1763 | good_response = smtp_read_response(&sx->inblock, rsp, n, |
1764 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1765 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1766 | sx->helo_response = string_copy(rsp); |
895fbaf2 | 1767 | #endif |
a57ce043 JH |
1768 | if (!good_response) |
1769 | { | |
1770 | /* Handle special logging for a closed connection after HELO | |
1771 | when had previously sent EHLO */ | |
1772 | ||
d093f8e5 | 1773 | if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET)) |
a57ce043 | 1774 | { |
de6273b4 JH |
1775 | errno = ERRNO_SMTPCLOSED; |
1776 | goto EHLOHELO_FAILED; | |
a57ce043 | 1777 | } |
d093f8e5 | 1778 | Ustrncpy(sx->buffer, rsp, sizeof(sx->buffer)/2); |
a57ce043 JH |
1779 | goto RESPONSE_FAILED; |
1780 | } | |
0756eb3c PH |
1781 | } |
1782 | ||
d093f8e5 | 1783 | sx->peer_offered = smtp_peer_options = 0; |
2d14f397 | 1784 | |
d093f8e5 | 1785 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 1786 | { |
e9166683 | 1787 | sx->peer_offered = ehlo_response(sx->buffer, |
ff5aac2b | 1788 | PEER_OFFERED_TLS /* others checked later */ |
9094b84b | 1789 | ); |
f1513293 | 1790 | |
0756eb3c PH |
1791 | /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */ |
1792 | ||
a7538db1 | 1793 | #ifdef SUPPORT_TLS |
d093f8e5 | 1794 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_TLS; |
7ade712c | 1795 | #endif |
2d14f397 | 1796 | } |
0756eb3c PH |
1797 | } |
1798 | ||
1799 | /* For continuing deliveries down the same channel, the socket is the standard | |
1800 | input, and we don't need to redo EHLO here (but may need to do so for TLS - see | |
1801 | below). Set up the pointer to where subsequent commands will be left, for | |
2d14f397 | 1802 | error messages. Note that smtp_peer_options will have been |
0756eb3c PH |
1803 | set from the command line if they were set in the process that passed the |
1804 | connection on. */ | |
1805 | ||
895fbaf2 | 1806 | /*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c |
4c04137d | 1807 | as the continue goes via transport_pass_socket() and doublefork and exec. |
895fbaf2 JH |
1808 | It does not wait. Unclear how we keep separate host's responses |
1809 | separate - we could match up by host ip+port as a bodge. */ | |
1810 | ||
0756eb3c PH |
1811 | else |
1812 | { | |
d093f8e5 | 1813 | sx->inblock.sock = sx->outblock.sock = fileno(stdin); |
0756eb3c | 1814 | smtp_command = big_buffer; |
d093f8e5 | 1815 | sx->host->port = sx->port; /* Record the port that was used */ |
02b41d71 | 1816 | sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */ |
0756eb3c PH |
1817 | } |
1818 | ||
1819 | /* If TLS is available on this connection, whether continued or not, attempt to | |
1820 | start up a TLS session, unless the host is in hosts_avoid_tls. If successful, | |
1821 | send another EHLO - the server may give a different answer in secure mode. We | |
1822 | use a separate buffer for reading the response to STARTTLS so that if it is | |
1823 | negative, the original EHLO data is available for subsequent analysis, should | |
1824 | the client not be required to use TLS. If the response is bad, copy the buffer | |
1825 | for error analysis. */ | |
1826 | ||
1827 | #ifdef SUPPORT_TLS | |
2d14f397 | 1828 | if ( smtp_peer_options & PEER_OFFERED_TLS |
5130845b | 1829 | && !suppress_tls |
02b41d71 | 1830 | && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK |
e9166683 | 1831 | && ( !sx->verify |
02b41d71 JH |
1832 | || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK |
1833 | ) ) | |
0756eb3c PH |
1834 | { |
1835 | uschar buffer2[4096]; | |
d093f8e5 | 1836 | if (smtp_write_command(&sx->outblock, FALSE, "STARTTLS\r\n") < 0) |
0756eb3c PH |
1837 | goto SEND_FAILED; |
1838 | ||
1839 | /* If there is an I/O error, transmission of this message is deferred. If | |
1840 | there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is | |
1841 | false, we also defer. However, if there is a temporary rejection of STARTTLS | |
1842 | and tls_tempfail_tryclear is true, or if there is an outright rejection of | |
1843 | STARTTLS, we carry on. This means we will try to send the message in clear, | |
1844 | unless the host is in hosts_require_tls (tested below). */ | |
1845 | ||
d093f8e5 JH |
1846 | if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2', |
1847 | sx->ob->command_timeout)) | |
0756eb3c | 1848 | { |
4b0fe319 JH |
1849 | if ( errno != 0 |
1850 | || buffer2[0] == 0 | |
d093f8e5 | 1851 | || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear) |
4b0fe319 | 1852 | ) |
0dda4340 | 1853 | { |
d093f8e5 | 1854 | Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer)); |
9e7e0f6a | 1855 | sx->buffer[sizeof(sx->buffer)-1] = '\0'; |
0756eb3c | 1856 | goto RESPONSE_FAILED; |
0dda4340 | 1857 | } |
0756eb3c PH |
1858 | } |
1859 | ||
1860 | /* STARTTLS accepted: try to negotiate a TLS session. */ | |
1861 | ||
1862 | else | |
061b7ebd | 1863 | TLS_NEGOTIATE: |
0756eb3c | 1864 | { |
d093f8e5 JH |
1865 | address_item * addr; |
1866 | int rc = tls_client_start(sx->inblock.sock, sx->host, sx->addrlist, sx->tblock | |
0e66b3b6 | 1867 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 1868 | , sx->dane ? &tlsa_dnsa : NULL |
0e66b3b6 JH |
1869 | # endif |
1870 | ); | |
0756eb3c PH |
1871 | |
1872 | /* TLS negotiation failed; give an error. From outside, this function may | |
1873 | be called again to try in clear on a new connection, if the options permit | |
1874 | it for this host. */ | |
1875 | ||
1876 | if (rc != OK) | |
1877 | { | |
6ebd79ec | 1878 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 1879 | if (sx->dane) log_write(0, LOG_MAIN, |
4b0fe319 | 1880 | "DANE attempt failed; no TLS connection to %s [%s]", |
d093f8e5 | 1881 | sx->host->name, sx->host->address); |
6ebd79ec JH |
1882 | # endif |
1883 | ||
de6273b4 | 1884 | errno = ERRNO_TLSFAILURE; |
0756eb3c | 1885 | message = US"failure while setting up TLS session"; |
d093f8e5 | 1886 | sx->send_quit = FALSE; |
0756eb3c PH |
1887 | goto TLS_FAILED; |
1888 | } | |
1889 | ||
1890 | /* TLS session is set up */ | |
1891 | ||
2d14f397 | 1892 | smtp_peer_options_wrap = smtp_peer_options; |
d093f8e5 | 1893 | for (addr = sx->addrlist; addr; addr = addr->next) |
5ca2a9a1 PH |
1894 | if (addr->transport_return == PENDING_DEFER) |
1895 | { | |
817d9f57 | 1896 | addr->cipher = tls_out.cipher; |
9d1c15ef JH |
1897 | addr->ourcert = tls_out.ourcert; |
1898 | addr->peercert = tls_out.peercert; | |
817d9f57 | 1899 | addr->peerdn = tls_out.peerdn; |
018058b2 | 1900 | addr->ocsp = tls_out.ocsp; |
5ca2a9a1 | 1901 | } |
0756eb3c PH |
1902 | } |
1903 | } | |
1904 | ||
061b7ebd PP |
1905 | /* if smtps, we'll have smtp_command set to something else; always safe to |
1906 | reset it here. */ | |
1907 | smtp_command = big_buffer; | |
1908 | ||
41c7c167 PH |
1909 | /* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If |
1910 | helo_data is null, we are dealing with a connection that was passed from | |
1911 | another process, and so we won't have expanded helo_data above. We have to | |
1912 | expand it here. $sending_ip_address and $sending_port are set up right at the | |
1913 | start of the Exim process (in exim.c). */ | |
0756eb3c | 1914 | |
817d9f57 | 1915 | if (tls_out.active >= 0) |
0756eb3c | 1916 | { |
061b7ebd | 1917 | char *greeting_cmd; |
895fbaf2 JH |
1918 | BOOL good_response; |
1919 | ||
d093f8e5 | 1920 | if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data))) |
41c7c167 | 1921 | { |
d093f8e5 JH |
1922 | uschar *message = string_sprintf("failed to expand helo_data: %s", |
1923 | expand_string_message); | |
1924 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
1925 | yield = DEFER; | |
1926 | goto SEND_QUIT; | |
41c7c167 PH |
1927 | } |
1928 | ||
0d0e4455 | 1929 | /* For SMTPS we need to wait for the initial OK response. */ |
d093f8e5 | 1930 | if (sx->smtps) |
061b7ebd | 1931 | { |
d093f8e5 JH |
1932 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1933 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1934 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1935 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
1936 | #endif |
1937 | if (!good_response) goto RESPONSE_FAILED; | |
0d0e4455 PP |
1938 | } |
1939 | ||
d093f8e5 | 1940 | if (sx->esmtp) |
0d0e4455 PP |
1941 | greeting_cmd = "EHLO"; |
1942 | else | |
1943 | { | |
1944 | greeting_cmd = "HELO"; | |
1945 | DEBUG(D_transport) | |
1946 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
061b7ebd PP |
1947 | } |
1948 | ||
d093f8e5 JH |
1949 | if (smtp_write_command(&sx->outblock, FALSE, "%s %s\r\n", |
1950 | sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0) | |
0756eb3c | 1951 | goto SEND_FAILED; |
d093f8e5 JH |
1952 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1953 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1954 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1955 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
1956 | #endif |
1957 | if (!good_response) goto RESPONSE_FAILED; | |
2d14f397 | 1958 | smtp_peer_options = 0; |
0756eb3c PH |
1959 | } |
1960 | ||
1961 | /* If the host is required to use a secure channel, ensure that we | |
1962 | have one. */ | |
1963 | ||
d093f8e5 | 1964 | else if ( sx->smtps |
0e66b3b6 | 1965 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 1966 | || sx->dane |
0e66b3b6 | 1967 | # endif |
d093f8e5 | 1968 | || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK |
7a31d643 | 1969 | ) |
0756eb3c | 1970 | { |
de6273b4 | 1971 | errno = ERRNO_TLSREQUIRED; |
c562fd30 | 1972 | message = string_sprintf("a TLS session is required, but %s", |
2d14f397 JH |
1973 | smtp_peer_options & PEER_OFFERED_TLS |
1974 | ? "an attempt to start TLS failed" : "the server did not offer TLS support"); | |
0756eb3c PH |
1975 | goto TLS_FAILED; |
1976 | } | |
0e66b3b6 | 1977 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
1978 | |
1979 | /* If TLS is active, we have just started it up and re-done the EHLO command, | |
1980 | so its response needs to be analyzed. If TLS is not active and this is a | |
1981 | continued session down a previously-used socket, we haven't just done EHLO, so | |
1982 | we skip this. */ | |
1983 | ||
1984 | if (continue_hostname == NULL | |
a7538db1 | 1985 | #ifdef SUPPORT_TLS |
817d9f57 | 1986 | || tls_out.active >= 0 |
a7538db1 | 1987 | #endif |
0756eb3c PH |
1988 | ) |
1989 | { | |
d093f8e5 | 1990 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 1991 | { |
e9166683 | 1992 | sx->peer_offered = ehlo_response(sx->buffer, |
d093f8e5 JH |
1993 | 0 /* no TLS */ |
1994 | | (sx->lmtp && sx->ob->lmtp_ignore_quota ? PEER_OFFERED_IGNQ : 0) | |
1995 | | PEER_OFFERED_CHUNKING | |
1996 | | PEER_OFFERED_PRDR | |
9094b84b | 1997 | #ifdef SUPPORT_I18N |
d093f8e5 JH |
1998 | | (sx->addrlist->prop.utf8_msg ? PEER_OFFERED_UTF8 : 0) |
1999 | /*XXX if we hand peercaps on to continued-conn processes, | |
2000 | must not depend on this addr */ | |
9094b84b | 2001 | #endif |
d093f8e5 JH |
2002 | | PEER_OFFERED_DSN |
2003 | | PEER_OFFERED_PIPE | |
2004 | | (sx->ob->size_addition >= 0 ? PEER_OFFERED_SIZE : 0) | |
9094b84b JH |
2005 | ); |
2006 | ||
2d14f397 JH |
2007 | /* Set for IGNOREQUOTA if the response to LHLO specifies support and the |
2008 | lmtp_ignore_quota option was set. */ | |
f1513293 | 2009 | |
d093f8e5 | 2010 | sx->igquotstr = sx->peer_offered & PEER_OFFERED_IGNQ ? US" IGNOREQUOTA" : US""; |
f1513293 | 2011 | |
2d14f397 JH |
2012 | /* If the response to EHLO specified support for the SIZE parameter, note |
2013 | this, provided size_addition is non-negative. */ | |
f1513293 | 2014 | |
d093f8e5 | 2015 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_SIZE; |
0756eb3c | 2016 | |
2d14f397 JH |
2017 | /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched |
2018 | the current host, esmtp will be false, so PIPELINING can never be used. If | |
2019 | the current host matches hosts_avoid_pipelining, don't do it. */ | |
0756eb3c | 2020 | |
d093f8e5 JH |
2021 | if ( sx->peer_offered & PEER_OFFERED_PIPE |
2022 | && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK) | |
2d14f397 | 2023 | smtp_peer_options |= PEER_OFFERED_PIPE; |
0756eb3c | 2024 | |
2d14f397 JH |
2025 | DEBUG(D_transport) debug_printf("%susing PIPELINING\n", |
2026 | smtp_peer_options & PEER_OFFERED_PIPE ? "" : "not "); | |
0756eb3c | 2027 | |
d093f8e5 JH |
2028 | if ( sx->peer_offered & PEER_OFFERED_CHUNKING |
2029 | && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK) | |
2030 | sx->peer_offered &= ~PEER_OFFERED_CHUNKING; | |
f98442df | 2031 | |
d093f8e5 | 2032 | if (sx->peer_offered & PEER_OFFERED_CHUNKING) |
2d14f397 | 2033 | {DEBUG(D_transport) debug_printf("CHUNKING usable\n");} |
0756eb3c | 2034 | |
8ccd00b1 | 2035 | #ifndef DISABLE_PRDR |
d093f8e5 JH |
2036 | if ( sx->peer_offered & PEER_OFFERED_PRDR |
2037 | && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK) | |
2038 | sx->peer_offered &= ~PEER_OFFERED_PRDR; | |
fd98a5c6 | 2039 | |
d093f8e5 | 2040 | if (sx->peer_offered & PEER_OFFERED_PRDR) |
2d14f397 | 2041 | {DEBUG(D_transport) debug_printf("PRDR usable\n");} |
fd98a5c6 JH |
2042 | #endif |
2043 | ||
2d14f397 | 2044 | /* Note if the server supports DSN */ |
d093f8e5 | 2045 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_DSN; |
2d14f397 | 2046 | DEBUG(D_transport) debug_printf("%susing DSN\n", |
d093f8e5 | 2047 | sx->peer_offered & PEER_OFFERED_DSN ? "" : "not "); |
6c1c3d1d | 2048 | |
2d14f397 JH |
2049 | /* Note if the response to EHLO specifies support for the AUTH extension. |
2050 | If it has, check that this host is one we want to authenticate to, and do | |
2051 | the business. The host name and address must be available when the | |
2052 | authenticator's client driver is running. */ | |
0756eb3c | 2053 | |
d093f8e5 JH |
2054 | switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host, |
2055 | sx->ob, sx->esmtp, &sx->inblock, &sx->outblock)) | |
2d14f397 JH |
2056 | { |
2057 | default: goto SEND_QUIT; | |
2058 | case OK: break; | |
2059 | case FAIL_SEND: goto SEND_FAILED; | |
2060 | case FAIL: goto RESPONSE_FAILED; | |
2061 | } | |
0756eb3c PH |
2062 | } |
2063 | } | |
2d14f397 | 2064 | pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE); |
0756eb3c PH |
2065 | |
2066 | /* The setting up of the SMTP call is now complete. Any subsequent errors are | |
2067 | message-specific. */ | |
2068 | ||
d093f8e5 | 2069 | sx->setting_up = FALSE; |
0756eb3c | 2070 | |
8c5d388a | 2071 | #ifdef SUPPORT_I18N |
d093f8e5 | 2072 | if (sx->addrlist->prop.utf8_msg) |
9094b84b | 2073 | { |
d093f8e5 JH |
2074 | sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt |
2075 | && !sx->addrlist->prop.utf8_downcvt_maybe; | |
2076 | DEBUG(D_transport) if (!sx->utf8_needed) | |
59a286ef | 2077 | debug_printf("utf8: %s downconvert\n", |
d093f8e5 | 2078 | sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional"); |
9094b84b JH |
2079 | } |
2080 | ||
7ade712c | 2081 | /* If this is an international message we need the host to speak SMTPUTF8 */ |
d093f8e5 | 2082 | if (sx->utf8_needed && !(sx->peer_offered & PEER_OFFERED_UTF8)) |
7ade712c JH |
2083 | { |
2084 | errno = ERRNO_UTF8_FWD; | |
2085 | goto RESPONSE_FAILED; | |
2086 | } | |
2087 | #endif | |
2088 | ||
d093f8e5 JH |
2089 | return OK; |
2090 | ||
2091 | ||
2092 | { | |
2093 | int code; | |
d093f8e5 JH |
2094 | |
2095 | RESPONSE_FAILED: | |
d093f8e5 | 2096 | message = NULL; |
de6273b4 | 2097 | sx->send_quit = check_response(sx->host, &errno, sx->addrlist->more_errno, |
d093f8e5 JH |
2098 | sx->buffer, &code, &message, &pass_message); |
2099 | goto FAILED; | |
d093f8e5 JH |
2100 | |
2101 | SEND_FAILED: | |
d093f8e5 JH |
2102 | code = '4'; |
2103 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
829dd842 | 2104 | sx->host->name, sx->host->address, strerror(errno)); |
d093f8e5 JH |
2105 | sx->send_quit = FALSE; |
2106 | goto FAILED; | |
d093f8e5 JH |
2107 | |
2108 | /* This label is jumped to directly when a TLS negotiation has failed, | |
2109 | or was not done for a host for which it is required. Values will be set | |
829dd842 | 2110 | in message and errno, and setting_up will always be true. Treat as |
d093f8e5 JH |
2111 | a temporary error. */ |
2112 | ||
de6273b4 JH |
2113 | EHLOHELO_FAILED: |
2114 | code = '4'; | |
2115 | message = string_sprintf("Remote host closed connection in response to %s" | |
2116 | " (EHLO response was: %s)", smtp_command, sx->buffer); | |
2117 | sx->send_quit = FALSE; | |
2118 | goto FAILED; | |
2119 | ||
d093f8e5 JH |
2120 | #ifdef SUPPORT_TLS |
2121 | TLS_FAILED: | |
de6273b4 JH |
2122 | code = '4'; |
2123 | goto FAILED; | |
d093f8e5 JH |
2124 | #endif |
2125 | ||
2126 | /* The failure happened while setting up the call; see if the failure was | |
2127 | a 5xx response (this will either be on connection, or following HELO - a 5xx | |
2128 | after EHLO causes it to try HELO). If so, fail all addresses, as this host is | |
2129 | never going to accept them. For other errors during setting up (timeouts or | |
2130 | whatever), defer all addresses, and yield DEFER, so that the host is not | |
2131 | tried again for a while. */ | |
2132 | ||
de6273b4 | 2133 | FAILED: |
d093f8e5 | 2134 | sx->ok = FALSE; /* For when reached by GOTO */ |
d093f8e5 JH |
2135 | |
2136 | yield = code == '5' | |
2137 | #ifdef SUPPORT_I18N | |
2138 | || errno == ERRNO_UTF8_FWD | |
2139 | #endif | |
2140 | ? FAIL : DEFER; | |
2141 | ||
829dd842 | 2142 | set_errno(sx->addrlist, errno, message, yield, pass_message, sx->host |
d093f8e5 JH |
2143 | #ifdef EXPERIMENTAL_DSN_INFO |
2144 | , sx->smtp_greeting, sx->helo_response | |
2145 | #endif | |
2146 | ); | |
2147 | } | |
2148 | ||
2149 | ||
2150 | SEND_QUIT: | |
2151 | ||
2152 | if (sx->send_quit) | |
2153 | (void)smtp_write_command(&sx->outblock, FALSE, "QUIT\r\n"); | |
2154 | ||
d093f8e5 JH |
2155 | #ifdef SUPPORT_TLS |
2156 | tls_close(FALSE, TRUE); | |
2157 | #endif | |
2158 | ||
2159 | /* Close the socket, and return the appropriate value, first setting | |
2160 | works because the NULL setting is passed back to the calling process, and | |
2161 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
2162 | ||
2163 | If all went well and continue_more is set, we shouldn't actually get here if | |
2164 | there are further addresses, as the return above will be taken. However, | |
2165 | writing RSET might have failed, or there may be other addresses whose hosts are | |
2166 | specified in the transports, and therefore not visible at top level, in which | |
2167 | case continue_more won't get set. */ | |
2168 | ||
2169 | HDEBUG(D_transport|D_acl|D_v) debug_printf(" SMTP(close)>>\n"); | |
2170 | if (sx->send_quit) | |
2171 | { | |
2172 | shutdown(sx->outblock.sock, SHUT_WR); | |
2173 | if (fcntl(sx->inblock.sock, F_SETFL, O_NONBLOCK) == 0) | |
2174 | for (rc = 16; read(sx->inblock.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;) | |
2175 | rc--; /* drain socket */ | |
02b41d71 | 2176 | sx->send_quit = FALSE; |
d093f8e5 JH |
2177 | } |
2178 | (void)close(sx->inblock.sock); | |
02b41d71 | 2179 | sx->inblock.sock = sx->outblock.sock = -1; |
d093f8e5 JH |
2180 | |
2181 | #ifndef DISABLE_EVENT | |
2182 | (void) event_raise(sx->tblock->event_action, US"tcp:close", NULL); | |
2183 | #endif | |
2184 | ||
2185 | continue_transport = NULL; | |
2186 | continue_hostname = NULL; | |
2187 | return yield; | |
2188 | } | |
2189 | ||
2190 | ||
9be4572b JH |
2191 | |
2192 | ||
2193 | /* Create the string of options that will be appended to the MAIL FROM: | |
2194 | in the connection context buffer */ | |
2195 | ||
2196 | static int | |
2197 | build_mailcmd_options(smtp_context * sx, address_item * addrlist) | |
2198 | { | |
2199 | uschar * p = sx->buffer; | |
2200 | address_item * addr; | |
2201 | int address_count; | |
2202 | ||
2203 | *p = 0; | |
2204 | ||
2205 | /* If we know the receiving MTA supports the SIZE qualification, | |
2206 | send it, adding something to the message size to allow for imprecision | |
2207 | and things that get added en route. Exim keeps the number of lines | |
2208 | in a message, so we can give an accurate value for the original message, but we | |
2209 | need some additional to handle added headers. (Double "." characters don't get | |
2210 | included in the count.) */ | |
2211 | ||
2212 | if (sx->peer_offered & PEER_OFFERED_SIZE) | |
2213 | { | |
2214 | sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition); | |
2215 | while (*p) p++; | |
2216 | } | |
2217 | ||
2218 | #ifndef DISABLE_PRDR | |
2219 | /* If it supports Per-Recipient Data Reponses, and we have omre than one recipient, | |
2220 | request that */ | |
2221 | ||
2222 | sx->prdr_active = FALSE; | |
2223 | if (sx->peer_offered & PEER_OFFERED_PRDR) | |
2224 | for (addr = addrlist; addr; addr = addr->next) | |
2225 | if (addr->transport_return == PENDING_DEFER) | |
2226 | { | |
2227 | for (addr = addr->next; addr; addr = addr->next) | |
2228 | if (addr->transport_return == PENDING_DEFER) | |
2229 | { /* at least two recipients to send */ | |
2230 | sx->prdr_active = TRUE; | |
2231 | sprintf(CS p, " PRDR"); p += 5; | |
2232 | break; | |
2233 | } | |
2234 | break; | |
2235 | } | |
2236 | #endif | |
2237 | ||
2238 | #ifdef SUPPORT_I18N | |
2239 | /* If it supports internationalised messages, and this meesage need that, | |
2240 | request it */ | |
2241 | ||
2242 | if ( sx->peer_offered & PEER_OFFERED_UTF8 | |
2243 | && addrlist->prop.utf8_msg | |
2244 | && !addrlist->prop.utf8_downcvt | |
2245 | ) | |
2246 | Ustrcpy(p, " SMTPUTF8"), p += 9; | |
2247 | #endif | |
2248 | ||
2249 | /* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */ | |
2250 | for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0; | |
2251 | addr && address_count < sx->max_rcpt; | |
2252 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2253 | { | |
2254 | address_count++; | |
2255 | if (!(addr->dsn_flags & rf_dsnlasthop)) | |
2256 | { | |
2257 | sx->dsn_all_lasthop = FALSE; | |
2258 | break; | |
2259 | } | |
2260 | } | |
2261 | ||
2262 | /* Add any DSN flags to the mail command */ | |
2263 | ||
2264 | if (sx->peer_offered & PEER_OFFERED_DSN && !sx->dsn_all_lasthop) | |
2265 | { | |
2266 | if (dsn_ret == dsn_ret_hdrs) | |
2267 | { Ustrcpy(p, " RET=HDRS"); p += 9; } | |
2268 | else if (dsn_ret == dsn_ret_full) | |
2269 | { Ustrcpy(p, " RET=FULL"); p += 9; } | |
2270 | ||
2271 | if (dsn_envid) | |
2272 | { | |
2273 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid); | |
2274 | while (*p) p++; | |
2275 | } | |
2276 | } | |
2277 | ||
2278 | /* If an authenticated_sender override has been specified for this transport | |
2279 | instance, expand it. If the expansion is forced to fail, and there was already | |
2280 | an authenticated_sender for this message, the original value will be used. | |
2281 | Other expansion failures are serious. An empty result is ignored, but there is | |
2282 | otherwise no check - this feature is expected to be used with LMTP and other | |
2283 | cases where non-standard addresses (e.g. without domains) might be required. */ | |
2284 | ||
2285 | if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob)) | |
2286 | return ERROR; | |
2287 | ||
2288 | return OK; | |
2289 | } | |
2290 | ||
2291 | ||
2292 | static void | |
2293 | build_rcptcmd_options(smtp_context * sx, const address_item * addr) | |
2294 | { | |
2295 | uschar * p = sx->buffer; | |
2296 | *p = 0; | |
2297 | ||
2298 | /* Add any DSN flags to the rcpt command */ | |
2299 | ||
2300 | if (sx->peer_offered & PEER_OFFERED_DSN && !(addr->dsn_flags & rf_dsnlasthop)) | |
2301 | { | |
2302 | if (addr->dsn_flags & rf_dsnflags) | |
2303 | { | |
2304 | int i; | |
2305 | BOOL first = TRUE; | |
2306 | ||
2307 | Ustrcpy(p, " NOTIFY="); | |
2308 | while (*p) p++; | |
2309 | for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i]) | |
2310 | { | |
2311 | if (!first) *p++ = ','; | |
2312 | first = FALSE; | |
2313 | Ustrcpy(p, rf_names[i]); | |
2314 | while (*p) p++; | |
2315 | } | |
2316 | } | |
2317 | ||
2318 | if (addr->dsn_orcpt) | |
2319 | { | |
2320 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s", | |
2321 | addr->dsn_orcpt); | |
2322 | while (*p) p++; | |
2323 | } | |
2324 | } | |
2325 | } | |
2326 | ||
2327 | ||
d9c3c8ed JH |
2328 | |
2329 | /* | |
2330 | Return: | |
e9166683 JH |
2331 | 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL) |
2332 | -1 MAIL response error | |
2333 | -2 any non-MAIL read i/o error | |
2334 | -3 non-MAIL response timeout | |
2335 | -4 internal error; channel still usable | |
2336 | -5 transmit failed | |
d9c3c8ed JH |
2337 | */ |
2338 | ||
2339 | int | |
2340 | smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield) | |
2341 | { | |
2342 | address_item * addr; | |
2343 | int address_count; | |
2344 | int rc; | |
2345 | ||
2346 | if (build_mailcmd_options(sx, sx->first_addr) != OK) | |
2347 | { | |
2348 | *yield = ERROR; | |
e9166683 | 2349 | return -4; |
d9c3c8ed JH |
2350 | } |
2351 | ||
2352 | /* From here until we send the DATA command, we can make use of PIPELINING | |
2353 | if the server host supports it. The code has to be able to check the responses | |
2354 | at any point, for when the buffer fills up, so we write it totally generally. | |
2355 | When PIPELINING is off, each command written reports that it has flushed the | |
2356 | buffer. */ | |
2357 | ||
2358 | sx->pending_MAIL = TRUE; /* The block starts with MAIL */ | |
2359 | ||
2360 | { | |
2361 | uschar * s = sx->from_addr; | |
2362 | #ifdef SUPPORT_I18N | |
2363 | uschar * errstr = NULL; | |
2364 | ||
2365 | /* If we must downconvert, do the from-address here. Remember we had to | |
2366 | for the to-addresses (done below), and also (ugly) for re-doing when building | |
2367 | the delivery log line. */ | |
2368 | ||
2369 | if ( sx->addrlist->prop.utf8_msg | |
2370 | && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & PEER_OFFERED_UTF8)) | |
2371 | ) | |
2372 | { | |
2373 | if (s = string_address_utf8_to_alabel(s, &errstr), errstr) | |
2374 | { | |
2375 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE); | |
2376 | *yield = ERROR; | |
e9166683 | 2377 | return -4; |
d9c3c8ed JH |
2378 | } |
2379 | setflag(sx->addrlist, af_utf8_downcvt); | |
2380 | } | |
2381 | #endif | |
2382 | ||
2383 | rc = smtp_write_command(&sx->outblock, pipelining_active, | |
2384 | "MAIL FROM:<%s>%s\r\n", s, sx->buffer); | |
2385 | } | |
2386 | ||
2387 | mail_command = string_copy(big_buffer); /* Save for later error message */ | |
2388 | ||
2389 | switch(rc) | |
2390 | { | |
2391 | case -1: /* Transmission error */ | |
e9166683 | 2392 | return -5; |
d9c3c8ed | 2393 | |
df5b41e3 | 2394 | case +1: /* Cmd was sent */ |
d9c3c8ed JH |
2395 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
2396 | sx->ob->command_timeout)) | |
2397 | { | |
2398 | if (errno == 0 && sx->buffer[0] == '4') | |
2399 | { | |
2400 | errno = ERRNO_MAIL4XX; | |
2401 | sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
2402 | } | |
2403 | return -1; | |
2404 | } | |
2405 | sx->pending_MAIL = FALSE; | |
2406 | break; | |
e9166683 JH |
2407 | |
2408 | /* otherwise zero: command queued for pipeline */ | |
d9c3c8ed JH |
2409 | } |
2410 | ||
2411 | /* Pass over all the relevant recipient addresses for this host, which are the | |
2412 | ones that have status PENDING_DEFER. If we are using PIPELINING, we can send | |
2413 | several before we have to read the responses for those seen so far. This | |
2414 | checking is done by a subroutine because it also needs to be done at the end. | |
2415 | Send only up to max_rcpt addresses at a time, leaving next_addr pointing to | |
2416 | the next one if not all are sent. | |
2417 | ||
2418 | In the MUA wrapper situation, we want to flush the PIPELINING buffer for the | |
2419 | last address because we want to abort if any recipients have any kind of | |
2420 | problem, temporary or permanent. We know that all recipient addresses will have | |
2421 | the PENDING_DEFER status, because only one attempt is ever made, and we know | |
e9166683 JH |
2422 | that max_rcpt will be large, so all addresses will be done at once. |
2423 | ||
2424 | For verify we flush the pipeline after any (the only) rcpt address. */ | |
d9c3c8ed JH |
2425 | |
2426 | for (addr = sx->first_addr, address_count = 0; | |
2427 | addr && address_count < sx->max_rcpt; | |
2428 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2429 | { | |
2430 | int count; | |
2431 | BOOL no_flush; | |
2432 | uschar * rcpt_addr; | |
2433 | ||
2434 | addr->dsn_aware = sx->peer_offered & PEER_OFFERED_DSN | |
2435 | ? dsn_support_yes : dsn_support_no; | |
2436 | ||
2437 | address_count++; | |
e9166683 | 2438 | no_flush = pipelining_active && !sx->verify && (!mua_wrapper || addr->next); |
d9c3c8ed JH |
2439 | |
2440 | build_rcptcmd_options(sx, addr); | |
2441 | ||
2442 | /* Now send the RCPT command, and process outstanding responses when | |
2443 | necessary. After a timeout on RCPT, we just end the function, leaving the | |
2444 | yield as OK, because this error can often mean that there is a problem with | |
2445 | just one address, so we don't want to delay the host. */ | |
2446 | ||
2447 | rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes); | |
2448 | ||
2449 | #ifdef SUPPORT_I18N | |
2450 | if ( testflag(sx->addrlist, af_utf8_downcvt) | |
2451 | && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL)) | |
2452 | ) | |
2453 | { | |
2454 | /*XXX could we use a per-address errstr here? Not fail the whole send? */ | |
2455 | errno = ERRNO_EXPANDFAIL; | |
e9166683 | 2456 | return -5; /*XXX too harsh? */ |
d9c3c8ed JH |
2457 | } |
2458 | #endif | |
2459 | ||
2460 | count = smtp_write_command(&sx->outblock, no_flush, "RCPT TO:<%s>%s%s\r\n", | |
2461 | rcpt_addr, sx->igquotstr, sx->buffer); | |
2462 | ||
e9166683 | 2463 | if (count < 0) return -5; |
d9c3c8ed JH |
2464 | if (count > 0) |
2465 | { | |
df5b41e3 | 2466 | switch(sync_responses(sx, count, 0)) |
d9c3c8ed JH |
2467 | { |
2468 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ | |
2469 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e9166683 | 2470 | break; |
d9c3c8ed JH |
2471 | |
2472 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ | |
2473 | if (!sx->lmtp) /* can't tell about progress yet */ | |
2474 | sx->completed_addr = TRUE; | |
2475 | case 0: /* No 2xx or 5xx, but no probs */ | |
2476 | break; | |
2477 | ||
e9166683 JH |
2478 | case -1: return -3; /* Timeout on RCPT */ |
2479 | case -2: return -2; /* non-MAIL read i/o error */ | |
2480 | default: return -1; /* any MAIL error */ | |
d9c3c8ed JH |
2481 | } |
2482 | sx->pending_MAIL = FALSE; /* Dealt with MAIL */ | |
2483 | } | |
2484 | } /* Loop for next address */ | |
2485 | ||
2486 | sx->next_addr = addr; | |
2487 | return 0; | |
2488 | } | |
2489 | ||
2490 | ||
d093f8e5 JH |
2491 | /************************************************* |
2492 | * Deliver address list to given host * | |
2493 | *************************************************/ | |
2494 | ||
2495 | /* If continue_hostname is not null, we get here only when continuing to | |
2496 | deliver down an existing channel. The channel was passed as the standard | |
2497 | input. TLS is never active on a passed channel; the previous process always | |
2498 | closes it down before passing the connection on. | |
2499 | ||
2500 | Otherwise, we have to make a connection to the remote host, and do the | |
2501 | initial protocol exchange. | |
2502 | ||
2503 | When running as an MUA wrapper, if the sender or any recipient is rejected, | |
2504 | temporarily or permanently, we force failure for all recipients. | |
2505 | ||
2506 | Arguments: | |
2507 | addrlist chain of potential addresses to deliver; only those whose | |
2508 | transport_return field is set to PENDING_DEFER are currently | |
2509 | being processed; others should be skipped - they have either | |
2510 | been delivered to an earlier host or IP address, or been | |
2511 | failed by one of them. | |
2512 | host host to deliver to | |
2513 | host_af AF_INET or AF_INET6 | |
2514 | port default TCP/IP port to use, in host byte order | |
2515 | interface interface to bind to, or NULL | |
2516 | tblock transport instance block | |
2517 | message_defer set TRUE if yield is OK, but all addresses were deferred | |
2518 | because of a non-recipient, non-host failure, that is, a | |
2519 | 4xx response to MAIL FROM, DATA, or ".". This is a defer | |
2520 | that is specific to the message. | |
2521 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for | |
2522 | a second attempt after TLS initialization fails | |
2523 | ||
2524 | Returns: OK - the connection was made and the delivery attempted; | |
2525 | the result for each address is in its data block. | |
2526 | DEFER - the connection could not be made, or something failed | |
2527 | while setting up the SMTP session, or there was a | |
2528 | non-message-specific error, such as a timeout. | |
2529 | ERROR - a filter command is specified for this transport, | |
2530 | and there was a problem setting it up; OR helo_data | |
2531 | or add_headers or authenticated_sender is specified | |
2532 | for this transport, and the string failed to expand | |
2533 | */ | |
2534 | ||
2535 | static int | |
2536 | smtp_deliver(address_item *addrlist, host_item *host, int host_af, int port, | |
2537 | uschar *interface, transport_instance *tblock, | |
2538 | BOOL *message_defer, BOOL suppress_tls) | |
2539 | { | |
2540 | address_item *addr; | |
d093f8e5 | 2541 | int yield = OK; |
d093f8e5 JH |
2542 | int save_errno; |
2543 | int rc; | |
2544 | time_t start_delivery_time = time(NULL); | |
2545 | ||
d093f8e5 JH |
2546 | BOOL pass_message = FALSE; |
2547 | uschar *message = NULL; | |
2548 | uschar new_message_id[MESSAGE_ID_LENGTH + 1]; | |
2549 | uschar *p; | |
2550 | ||
2551 | smtp_context sx; | |
2552 | ||
2553 | suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */ | |
02b41d71 | 2554 | *message_defer = FALSE; |
d093f8e5 JH |
2555 | |
2556 | sx.addrlist = addrlist; | |
2557 | sx.host = host; | |
2558 | sx.host_af = host_af, | |
2559 | sx.port = port; | |
2560 | sx.interface = interface; | |
02b41d71 | 2561 | sx.helo_data = NULL; |
d093f8e5 | 2562 | sx.tblock = tblock; |
e9166683 | 2563 | sx.verify = FALSE; |
d093f8e5 | 2564 | |
9be4572b JH |
2565 | /* Get the channel set up ready for a message (MAIL FROM being the next |
2566 | SMTP command to send */ | |
2567 | ||
e9166683 | 2568 | if ((rc = smtp_setup_conn(&sx, suppress_tls)) != OK) |
d093f8e5 JH |
2569 | return rc; |
2570 | ||
0756eb3c PH |
2571 | /* If there is a filter command specified for this transport, we can now |
2572 | set it up. This cannot be done until the identify of the host is known. */ | |
2573 | ||
e9166683 | 2574 | if (tblock->filter_command) |
0756eb3c PH |
2575 | { |
2576 | BOOL rc; | |
76ac1b5b JH |
2577 | uschar fbuf[64]; |
2578 | sprintf(CS fbuf, "%.50s transport", tblock->name); | |
0756eb3c | 2579 | rc = transport_set_up_command(&transport_filter_argv, tblock->filter_command, |
76ac1b5b | 2580 | TRUE, DEFER, addrlist, fbuf, NULL); |
9b989985 | 2581 | transport_filter_timeout = tblock->filter_timeout; |
0756eb3c PH |
2582 | |
2583 | /* On failure, copy the error to all addresses, abandon the SMTP call, and | |
2584 | yield ERROR. */ | |
2585 | ||
2586 | if (!rc) | |
2587 | { | |
895fbaf2 JH |
2588 | set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER, |
2589 | FALSE); | |
0756eb3c PH |
2590 | yield = ERROR; |
2591 | goto SEND_QUIT; | |
2592 | } | |
48f1c853 JH |
2593 | |
2594 | if ( transport_filter_argv | |
2595 | && *transport_filter_argv | |
2596 | && **transport_filter_argv | |
d093f8e5 | 2597 | && sx.peer_offered & PEER_OFFERED_CHUNKING |
48f1c853 JH |
2598 | ) |
2599 | { | |
d093f8e5 | 2600 | sx.peer_offered &= ~PEER_OFFERED_CHUNKING; |
48f1c853 JH |
2601 | DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n"); |
2602 | } | |
0756eb3c PH |
2603 | } |
2604 | ||
2605 | ||
2606 | /* For messages that have more than the maximum number of envelope recipients, | |
2607 | we want to send several transactions down the same SMTP connection. (See | |
2608 | comments in deliver.c as to how this reconciles, heuristically, with | |
2609 | remote_max_parallel.) This optimization was added to Exim after the following | |
2610 | code was already working. The simplest way to put it in without disturbing the | |
2611 | code was to use a goto to jump back to this point when there is another | |
2612 | transaction to handle. */ | |
2613 | ||
2614 | SEND_MESSAGE: | |
d9c3c8ed JH |
2615 | sx.from_addr = return_path; |
2616 | sx.first_addr = sx.sync_addr = addrlist; | |
d093f8e5 JH |
2617 | sx.ok = FALSE; |
2618 | sx.send_rset = TRUE; | |
d9c3c8ed | 2619 | sx.completed_addr = FALSE; |
0756eb3c PH |
2620 | |
2621 | ||
9be4572b | 2622 | /* Initiate a message transfer. */ |
6b62e899 | 2623 | |
d9c3c8ed | 2624 | switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield)) |
0756eb3c | 2625 | { |
e9166683 JH |
2626 | case 0: break; |
2627 | case -1: case -2: goto RESPONSE_FAILED; | |
2628 | case -3: goto END_OFF; | |
2629 | case -4: goto SEND_QUIT; | |
2630 | default: goto SEND_FAILED; | |
0756eb3c PH |
2631 | } |
2632 | ||
0756eb3c PH |
2633 | /* If we are an MUA wrapper, abort if any RCPTs were rejected, either |
2634 | permanently or temporarily. We should have flushed and synced after the last | |
2635 | RCPT. */ | |
2636 | ||
2637 | if (mua_wrapper) | |
2638 | { | |
2639 | address_item *badaddr; | |
d9c3c8ed | 2640 | for (badaddr = sx.first_addr; badaddr; badaddr = badaddr->next) |
168dec3b JH |
2641 | if (badaddr->transport_return != PENDING_OK) |
2642 | { | |
2643 | /*XXX could we find a better errno than 0 here? */ | |
895fbaf2 JH |
2644 | set_errno_nohost(addrlist, 0, badaddr->message, FAIL, |
2645 | testflag(badaddr, af_pass_message)); | |
d093f8e5 | 2646 | sx.ok = FALSE; |
168dec3b JH |
2647 | break; |
2648 | } | |
0756eb3c PH |
2649 | } |
2650 | ||
2651 | /* If ok is TRUE, we know we have got at least one good recipient, and must now | |
2652 | send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still | |
2653 | have a good recipient buffered up if we are pipelining. We don't want to waste | |
2654 | time sending DATA needlessly, so we only send it if either ok is TRUE or if we | |
6d5c916c JH |
2655 | are pipelining. The responses are all handled by sync_responses(). |
2656 | If using CHUNKING, do not send a BDAT until we know how big a chunk we want | |
2657 | to send is. */ | |
0756eb3c | 2658 | |
d093f8e5 JH |
2659 | if ( !(sx.peer_offered & PEER_OFFERED_CHUNKING) |
2660 | && (sx.ok || (pipelining_active && !mua_wrapper))) | |
0756eb3c | 2661 | { |
d093f8e5 | 2662 | int count = smtp_write_command(&sx.outblock, FALSE, "DATA\r\n"); |
6d5c916c | 2663 | |
0756eb3c | 2664 | if (count < 0) goto SEND_FAILED; |
df5b41e3 | 2665 | switch(sync_responses(&sx, count, sx.ok ? +1 : -1)) |
0756eb3c | 2666 | { |
d093f8e5 | 2667 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 2668 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
0756eb3c PH |
2669 | break; |
2670 | ||
d093f8e5 | 2671 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 2672 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
0756eb3c PH |
2673 | case 0: break; /* No 2xx or 5xx, but no probs */ |
2674 | ||
2675 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
2676 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
2677 | } | |
0d9fa8c0 | 2678 | pipelining_active = FALSE; |
87cb4a16 | 2679 | data_command = string_copy(big_buffer); /* Save for later error message */ |
0756eb3c PH |
2680 | } |
2681 | ||
0756eb3c PH |
2682 | /* If there were no good recipients (but otherwise there have been no |
2683 | problems), just set ok TRUE, since we have handled address-specific errors | |
2684 | already. Otherwise, it's OK to send the message. Use the check/escape mechanism | |
2685 | for handling the SMTP dot-handling protocol, flagging to apply to headers as | |
2686 | well as body. Set the appropriate timeout value to be used for each chunk. | |
2687 | (Haven't been able to make it work using select() for writing yet.) */ | |
2688 | ||
d093f8e5 | 2689 | if (!(sx.peer_offered & PEER_OFFERED_CHUNKING) && !sx.ok) |
6d5c916c JH |
2690 | { |
2691 | /* Save the first address of the next batch. */ | |
d9c3c8ed | 2692 | sx.first_addr = sx.next_addr; |
6d5c916c | 2693 | |
d093f8e5 | 2694 | sx.ok = TRUE; |
6d5c916c | 2695 | } |
ff5aac2b | 2696 | else |
0756eb3c | 2697 | { |
6b46ecc6 JH |
2698 | transport_ctx tctx = { |
2699 | tblock, | |
2700 | addrlist, | |
2701 | US".", US"..", /* Escaping strings */ | |
65de12cc | 2702 | topt_use_crlf | topt_escape_headers |
6b46ecc6 JH |
2703 | | (tblock->body_only ? topt_no_headers : 0) |
2704 | | (tblock->headers_only ? topt_no_body : 0) | |
2705 | | (tblock->return_path_add ? topt_add_return_path : 0) | |
2706 | | (tblock->delivery_date_add ? topt_add_delivery_date : 0) | |
2707 | | (tblock->envelope_to_add ? topt_add_envelope_to : 0) | |
2708 | }; | |
2709 | ||
6d5c916c JH |
2710 | /* If using CHUNKING we need a callback from the generic transport |
2711 | support to us, for the sending of BDAT smtp commands and the reaping | |
2712 | of responses. The callback needs a whole bunch of state so set up | |
2713 | a transport-context structure to be passed around. */ | |
2714 | ||
d093f8e5 | 2715 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) |
59932f7d | 2716 | { |
65de12cc | 2717 | tctx.check_string = tctx.escape_string = NULL; |
6d5c916c JH |
2718 | tctx.options |= topt_use_bdat; |
2719 | tctx.chunk_cb = smtp_chunk_cmd_callback; | |
e9166683 JH |
2720 | sx.pending_BDAT = FALSE; |
2721 | sx.good_RCPT = sx.ok; | |
2722 | sx.cmd_count = 0; | |
2723 | tctx.smtp_context = &sx; | |
59932f7d JH |
2724 | } |
2725 | else | |
65de12cc | 2726 | tctx.options |= topt_end_dot; |
59932f7d | 2727 | |
6d5c916c | 2728 | /* Save the first address of the next batch. */ |
d9c3c8ed | 2729 | sx.first_addr = sx.next_addr; |
6d5c916c | 2730 | |
e027f545 JH |
2731 | /* Responses from CHUNKING commands go in buffer. Otherwise, |
2732 | there has not been a response. */ | |
2733 | ||
d093f8e5 | 2734 | sx.buffer[0] = 0; |
e027f545 | 2735 | |
0756eb3c | 2736 | sigalrm_seen = FALSE; |
d093f8e5 | 2737 | transport_write_timeout = sx.ob->data_timeout; |
0756eb3c PH |
2738 | smtp_command = US"sending data block"; /* For error messages */ |
2739 | DEBUG(D_transport|D_v) | |
d093f8e5 | 2740 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) |
6d5c916c JH |
2741 | debug_printf(" will write message using CHUNKING\n"); |
2742 | else | |
2743 | debug_printf(" SMTP>> writing message and terminating \".\"\n"); | |
0756eb3c | 2744 | transport_count = 0; |
a7538db1 | 2745 | |
80a47a2c | 2746 | #ifndef DISABLE_DKIM |
d093f8e5 | 2747 | sx.ok = dkim_transport_write_message(sx.inblock.sock, &tctx, &sx.ob->dkim); |
4cd12fe9 | 2748 | #else |
d093f8e5 | 2749 | sx.ok = transport_write_message(sx.inblock.sock, &tctx, 0); |
4cd12fe9 | 2750 | #endif |
0756eb3c PH |
2751 | |
2752 | /* transport_write_message() uses write() because it is called from other | |
2753 | places to write to non-sockets. This means that under some OS (e.g. Solaris) | |
2754 | it can exit with "Broken pipe" as its error. This really means that the | |
2755 | socket got closed at the far end. */ | |
2756 | ||
2757 | transport_write_timeout = 0; /* for subsequent transports */ | |
2758 | ||
2759 | /* Failure can either be some kind of I/O disaster (including timeout), | |
e027f545 JH |
2760 | or the failure of a transport filter or the expansion of added headers. |
2761 | Or, when CHUNKING, it can be a protocol-detected failure. */ | |
0756eb3c | 2762 | |
d093f8e5 | 2763 | if (!sx.ok) |
0756eb3c | 2764 | goto RESPONSE_FAILED; |
0756eb3c PH |
2765 | |
2766 | /* We used to send the terminating "." explicitly here, but because of | |
2767 | buffering effects at both ends of TCP/IP connections, you don't gain | |
2768 | anything by keeping it separate, so it might as well go in the final | |
2769 | data buffer for efficiency. This is now done by setting the topt_end_dot | |
2770 | flag above. */ | |
2771 | ||
2772 | smtp_command = US"end of data"; | |
2773 | ||
e9166683 | 2774 | if (sx.peer_offered & PEER_OFFERED_CHUNKING && sx.cmd_count > 1) |
6d5c916c JH |
2775 | { |
2776 | /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */ | |
e9166683 | 2777 | switch(sync_responses(&sx, sx.cmd_count-1, 0)) |
6d5c916c | 2778 | { |
d093f8e5 | 2779 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 2780 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
6d5c916c JH |
2781 | break; |
2782 | ||
d093f8e5 | 2783 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 2784 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
6d5c916c JH |
2785 | case 0: break; /* No 2xx or 5xx, but no probs */ |
2786 | ||
2787 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
2788 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
2789 | } | |
2790 | } | |
2791 | ||
8ccd00b1 | 2792 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
2793 | /* For PRDR we optionally get a partial-responses warning |
2794 | * followed by the individual responses, before going on with | |
2795 | * the overall response. If we don't get the warning then deal | |
2796 | * with per non-PRDR. */ | |
d093f8e5 | 2797 | if(sx.prdr_active) |
fd98a5c6 | 2798 | { |
d093f8e5 JH |
2799 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3', |
2800 | sx.ob->final_timeout); | |
2801 | if (!sx.ok && errno == 0) switch(sx.buffer[0]) | |
e027f545 | 2802 | { |
d093f8e5 JH |
2803 | case '2': sx.prdr_active = FALSE; |
2804 | sx.ok = TRUE; | |
e027f545 JH |
2805 | break; |
2806 | case '4': errno = ERRNO_DATA4XX; | |
2807 | addrlist->more_errno |= | |
d093f8e5 | 2808 | ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e027f545 JH |
2809 | break; |
2810 | } | |
fd98a5c6 JH |
2811 | } |
2812 | else | |
2813 | #endif | |
2814 | ||
2815 | /* For non-PRDR SMTP, we now read a single response that applies to the | |
2816 | whole message. If it is OK, then all the addresses have been delivered. */ | |
0756eb3c | 2817 | |
d093f8e5 | 2818 | if (!sx.lmtp) |
e97957bc | 2819 | { |
d093f8e5 JH |
2820 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
2821 | sx.ob->final_timeout); | |
2822 | if (!sx.ok && errno == 0 && sx.buffer[0] == '4') | |
e97957bc PH |
2823 | { |
2824 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 2825 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e97957bc PH |
2826 | } |
2827 | } | |
0756eb3c PH |
2828 | |
2829 | /* For LMTP, we get back a response for every RCPT command that we sent; | |
2830 | some may be accepted and some rejected. For those that get a response, their | |
2831 | status is fixed; any that are accepted have been handed over, even if later | |
2832 | responses crash - at least, that's how I read RFC 2033. | |
2833 | ||
2834 | If all went well, mark the recipient addresses as completed, record which | |
2835 | host/IPaddress they were delivered to, and cut out RSET when sending another | |
2836 | message down the same channel. Write the completed addresses to the journal | |
2837 | now so that they are recorded in case there is a crash of hardware or | |
2838 | software before the spool gets updated. Also record the final SMTP | |
2839 | confirmation if needed (for SMTP only). */ | |
2840 | ||
d093f8e5 | 2841 | if (sx.ok) |
0756eb3c PH |
2842 | { |
2843 | int flag = '='; | |
2844 | int delivery_time = (int)(time(NULL) - start_delivery_time); | |
2845 | int len; | |
0756eb3c | 2846 | uschar *conf = NULL; |
0d9fa8c0 | 2847 | |
d093f8e5 | 2848 | sx.send_rset = FALSE; |
0d9fa8c0 | 2849 | pipelining_active = FALSE; |
0756eb3c | 2850 | |
0756eb3c PH |
2851 | /* Set up confirmation if needed - applies only to SMTP */ |
2852 | ||
d68218c7 | 2853 | if ( |
0cbf2b82 | 2854 | #ifdef DISABLE_EVENT |
6c6d6e48 | 2855 | LOGGING(smtp_confirmation) && |
a7538db1 | 2856 | #endif |
d093f8e5 | 2857 | !sx.lmtp |
d68218c7 | 2858 | ) |
0756eb3c | 2859 | { |
d093f8e5 | 2860 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 2861 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
d093f8e5 | 2862 | conf = (s == sx.buffer)? (uschar *)string_copy(s) : US s; |
0756eb3c PH |
2863 | } |
2864 | ||
fd98a5c6 | 2865 | /* Process all transported addresses - for LMTP or PRDR, read a status for |
0756eb3c PH |
2866 | each one. */ |
2867 | ||
d9c3c8ed | 2868 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
0756eb3c PH |
2869 | { |
2870 | if (addr->transport_return != PENDING_OK) continue; | |
2871 | ||
2872 | /* LMTP - if the response fails badly (e.g. timeout), use it for all the | |
2873 | remaining addresses. Otherwise, it's a return code for just the one | |
75def545 PH |
2874 | address. For temporary errors, add a retry item for the address so that |
2875 | it doesn't get tried again too soon. */ | |
0756eb3c | 2876 | |
8ccd00b1 | 2877 | #ifndef DISABLE_PRDR |
d093f8e5 | 2878 | if (sx.lmtp || sx.prdr_active) |
fd98a5c6 | 2879 | #else |
d093f8e5 | 2880 | if (sx.lmtp) |
fd98a5c6 | 2881 | #endif |
0756eb3c | 2882 | { |
d093f8e5 JH |
2883 | if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
2884 | sx.ob->final_timeout)) | |
0756eb3c | 2885 | { |
d093f8e5 | 2886 | if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED; |
fd98a5c6 | 2887 | addr->message = string_sprintf( |
8ccd00b1 | 2888 | #ifndef DISABLE_PRDR |
d093f8e5 | 2889 | "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP", |
fd98a5c6 JH |
2890 | #else |
2891 | "LMTP error after %s: %s", | |
2892 | #endif | |
d093f8e5 | 2893 | data_command, string_printing(sx.buffer)); |
75def545 | 2894 | setflag(addr, af_pass_message); /* Allow message to go to user */ |
d093f8e5 | 2895 | if (sx.buffer[0] == '5') |
75def545 PH |
2896 | addr->transport_return = FAIL; |
2897 | else | |
2898 | { | |
e97957bc | 2899 | errno = ERRNO_DATA4XX; |
d093f8e5 | 2900 | addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
75def545 | 2901 | addr->transport_return = DEFER; |
8ccd00b1 | 2902 | #ifndef DISABLE_PRDR |
d093f8e5 | 2903 | if (!sx.prdr_active) |
fd98a5c6 JH |
2904 | #endif |
2905 | retry_add_item(addr, addr->address_retry_key, 0); | |
75def545 | 2906 | } |
0756eb3c PH |
2907 | continue; |
2908 | } | |
d9c3c8ed | 2909 | sx.completed_addr = TRUE; /* NOW we can set this flag */ |
6c6d6e48 | 2910 | if (LOGGING(smtp_confirmation)) |
c0ea85ab | 2911 | { |
d093f8e5 | 2912 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 2913 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
d093f8e5 | 2914 | conf = (s == sx.buffer) ? US string_copy(s) : US s; |
c0ea85ab | 2915 | } |
0756eb3c PH |
2916 | } |
2917 | ||
2918 | /* SMTP, or success return from LMTP for this address. Pass back the | |
2d280592 | 2919 | actual host that was used. */ |
0756eb3c PH |
2920 | |
2921 | addr->transport_return = OK; | |
2922 | addr->more_errno = delivery_time; | |
d427a7f9 | 2923 | addr->host_used = host; |
0756eb3c PH |
2924 | addr->special_action = flag; |
2925 | addr->message = conf; | |
8ccd00b1 | 2926 | #ifndef DISABLE_PRDR |
d093f8e5 | 2927 | if (sx.prdr_active) addr->flags |= af_prdr_used; |
fd98a5c6 | 2928 | #endif |
d093f8e5 | 2929 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) addr->flags |= af_chunking_used; |
0756eb3c PH |
2930 | flag = '-'; |
2931 | ||
8ccd00b1 | 2932 | #ifndef DISABLE_PRDR |
d093f8e5 | 2933 | if (!sx.prdr_active) |
fd98a5c6 JH |
2934 | #endif |
2935 | { | |
2936 | /* Update the journal. For homonymic addresses, use the base address plus | |
2937 | the transport name. See lots of comments in deliver.c about the reasons | |
2938 | for the complications when homonyms are involved. Just carry on after | |
2939 | write error, as it may prove possible to update the spool file later. */ | |
4d8d62b9 | 2940 | |
fd98a5c6 | 2941 | if (testflag(addr, af_homonym)) |
d093f8e5 | 2942 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); |
fd98a5c6 | 2943 | else |
d093f8e5 | 2944 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); |
4d8d62b9 | 2945 | |
d093f8e5 JH |
2946 | DEBUG(D_deliver) debug_printf("journalling %s\n", sx.buffer); |
2947 | len = Ustrlen(CS sx.buffer); | |
2948 | if (write(journal_fd, sx.buffer, len) != len) | |
fd98a5c6 | 2949 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " |
d093f8e5 | 2950 | "%s: %s", sx.buffer, strerror(errno)); |
fd98a5c6 | 2951 | } |
0756eb3c PH |
2952 | } |
2953 | ||
8ccd00b1 | 2954 | #ifndef DISABLE_PRDR |
d093f8e5 | 2955 | if (sx.prdr_active) |
fd98a5c6 JH |
2956 | { |
2957 | /* PRDR - get the final, overall response. For any non-success | |
2958 | upgrade all the address statuses. */ | |
d093f8e5 JH |
2959 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
2960 | sx.ob->final_timeout); | |
2961 | if (!sx.ok) | |
fd98a5c6 | 2962 | { |
d093f8e5 | 2963 | if(errno == 0 && sx.buffer[0] == '4') |
fd98a5c6 JH |
2964 | { |
2965 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 2966 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
fd98a5c6 | 2967 | } |
d9c3c8ed | 2968 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
d093f8e5 | 2969 | if (sx.buffer[0] == '5' || addr->transport_return == OK) |
fd98a5c6 JH |
2970 | addr->transport_return = PENDING_OK; /* allow set_errno action */ |
2971 | goto RESPONSE_FAILED; | |
2972 | } | |
2973 | ||
2974 | /* Update the journal, or setup retry. */ | |
d9c3c8ed | 2975 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
fd98a5c6 | 2976 | if (addr->transport_return == OK) |
9be4572b JH |
2977 | { |
2978 | if (testflag(addr, af_homonym)) | |
2979 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); | |
2980 | else | |
2981 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); | |
2982 | ||
2983 | DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer); | |
2984 | len = Ustrlen(CS sx.buffer); | |
2985 | if (write(journal_fd, sx.buffer, len) != len) | |
2986 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " | |
2987 | "%s: %s", sx.buffer, strerror(errno)); | |
2988 | } | |
2989 | else if (addr->transport_return == DEFER) | |
2990 | retry_add_item(addr, addr->address_retry_key, -2); | |
fd98a5c6 JH |
2991 | } |
2992 | #endif | |
2993 | ||
0756eb3c PH |
2994 | /* Ensure the journal file is pushed out to disk. */ |
2995 | ||
54fc8428 | 2996 | if (EXIMfsync(journal_fd) < 0) |
0756eb3c PH |
2997 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", |
2998 | strerror(errno)); | |
2999 | } | |
3000 | } | |
3001 | ||
3002 | ||
3003 | /* Handle general (not specific to one address) failures here. The value of ok | |
3004 | is used to skip over this code on the falling through case. A timeout causes a | |
3005 | deferral. Other errors may defer or fail according to the response code, and | |
3006 | may set up a special errno value, e.g. after connection chopped, which is | |
3007 | assumed if errno == 0 and there is no text in the buffer. If control reaches | |
3008 | here during the setting up phase (i.e. before MAIL FROM) then always defer, as | |
3009 | the problem is not related to this specific message. */ | |
3010 | ||
d093f8e5 | 3011 | if (!sx.ok) |
0756eb3c | 3012 | { |
895fbaf2 JH |
3013 | int code, set_rc; |
3014 | uschar * set_message; | |
0756eb3c PH |
3015 | |
3016 | RESPONSE_FAILED: | |
895fbaf2 JH |
3017 | { |
3018 | save_errno = errno; | |
3019 | message = NULL; | |
d093f8e5 JH |
3020 | sx.send_quit = check_response(host, &save_errno, addrlist->more_errno, |
3021 | sx.buffer, &code, &message, &pass_message); | |
895fbaf2 JH |
3022 | goto FAILED; |
3023 | } | |
0756eb3c PH |
3024 | |
3025 | SEND_FAILED: | |
895fbaf2 JH |
3026 | { |
3027 | save_errno = errno; | |
3028 | code = '4'; | |
3029 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
3030 | host->name, host->address, strerror(save_errno)); | |
d093f8e5 | 3031 | sx.send_quit = FALSE; |
895fbaf2 JH |
3032 | goto FAILED; |
3033 | } | |
0756eb3c | 3034 | |
0756eb3c | 3035 | FAILED: |
9be4572b JH |
3036 | { |
3037 | BOOL message_error; | |
0756eb3c | 3038 | |
9be4572b JH |
3039 | sx.ok = FALSE; /* For when reached by GOTO */ |
3040 | set_message = message; | |
0756eb3c | 3041 | |
e97957bc | 3042 | /* We want to handle timeouts after MAIL or "." and loss of connection after |
0756eb3c | 3043 | "." specially. They can indicate a problem with the sender address or with |
e97957bc PH |
3044 | the contents of the message rather than a real error on the connection. These |
3045 | cases are treated in the same way as a 4xx response. This next bit of code | |
3046 | does the classification. */ | |
0756eb3c | 3047 | |
e97957bc PH |
3048 | switch(save_errno) |
3049 | { | |
3050 | case 0: | |
3051 | case ERRNO_MAIL4XX: | |
3052 | case ERRNO_DATA4XX: | |
250b6871 JH |
3053 | message_error = TRUE; |
3054 | break; | |
0756eb3c | 3055 | |
e97957bc | 3056 | case ETIMEDOUT: |
250b6871 JH |
3057 | message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 || |
3058 | Ustrncmp(smtp_command,"end ",4) == 0; | |
3059 | break; | |
e97957bc PH |
3060 | |
3061 | case ERRNO_SMTPCLOSED: | |
250b6871 JH |
3062 | message_error = Ustrncmp(smtp_command,"end ",4) == 0; |
3063 | break; | |
e97957bc PH |
3064 | |
3065 | default: | |
250b6871 JH |
3066 | message_error = FALSE; |
3067 | break; | |
e97957bc | 3068 | } |
0756eb3c | 3069 | |
e97957bc | 3070 | /* Handle the cases that are treated as message errors. These are: |
0756eb3c | 3071 | |
e97957bc PH |
3072 | (a) negative response or timeout after MAIL |
3073 | (b) negative response after DATA | |
3074 | (c) negative response or timeout or dropped connection after "." | |
250b6871 | 3075 | (d) utf8 support required and not offered |
0756eb3c | 3076 | |
e97957bc PH |
3077 | It won't be a negative response or timeout after RCPT, as that is dealt |
3078 | with separately above. The action in all cases is to set an appropriate | |
3079 | error code for all the addresses, but to leave yield set to OK because the | |
3080 | host itself has not failed. Of course, it might in practice have failed | |
3081 | when we've had a timeout, but if so, we'll discover that at the next | |
3082 | delivery attempt. For a temporary error, set the message_defer flag, and | |
3083 | write to the logs for information if this is not the last host. The error | |
3084 | for the last host will be logged as part of the address's log line. */ | |
3085 | ||
3086 | if (message_error) | |
0756eb3c | 3087 | { |
e97957bc | 3088 | if (mua_wrapper) code = '5'; /* Force hard failure in wrapper mode */ |
e97957bc PH |
3089 | |
3090 | /* If there's an errno, the message contains just the identity of | |
3091 | the host. */ | |
3092 | ||
895fbaf2 JH |
3093 | if (code == '5') |
3094 | set_rc = FAIL; | |
3095 | else /* Anything other than 5 is treated as temporary */ | |
e97957bc | 3096 | { |
895fbaf2 | 3097 | set_rc = DEFER; |
e97957bc PH |
3098 | if (save_errno > 0) |
3099 | message = US string_sprintf("%s: %s", message, strerror(save_errno)); | |
3100 | if (host->next != NULL) log_write(0, LOG_MAIN, "%s", message); | |
c562fd30 | 3101 | msglog_line(host, message); |
e97957bc PH |
3102 | *message_defer = TRUE; |
3103 | } | |
3104 | } | |
3105 | ||
3106 | /* Otherwise, we have an I/O error or a timeout other than after MAIL or | |
3107 | ".", or some other transportation error. We defer all addresses and yield | |
3108 | DEFER, except for the case of failed add_headers expansion, or a transport | |
3109 | filter failure, when the yield should be ERROR, to stop it trying other | |
3110 | hosts. */ | |
3111 | ||
3112 | else | |
3113 | { | |
895fbaf2 | 3114 | set_rc = DEFER; |
e97957bc PH |
3115 | yield = (save_errno == ERRNO_CHHEADER_FAIL || |
3116 | save_errno == ERRNO_FILTER_FAIL)? ERROR : DEFER; | |
0756eb3c PH |
3117 | } |
3118 | } | |
895fbaf2 JH |
3119 | |
3120 | set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host | |
3121 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 3122 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3123 | #endif |
3124 | ); | |
0756eb3c PH |
3125 | } |
3126 | ||
3127 | ||
3128 | /* If all has gone well, send_quit will be set TRUE, implying we can end the | |
3129 | SMTP session tidily. However, if there were too many addresses to send in one | |
3130 | message (indicated by first_addr being non-NULL) we want to carry on with the | |
3131 | rest of them. Also, it is desirable to send more than one message down the SMTP | |
3132 | connection if there are several waiting, provided we haven't already sent so | |
3133 | many as to hit the configured limit. The function transport_check_waiting looks | |
3134 | for a waiting message and returns its id. Then transport_pass_socket tries to | |
3135 | set up a continued delivery by passing the socket on to another process. The | |
3136 | variable send_rset is FALSE if a message has just been successfully transfered. | |
3137 | ||
3138 | If we are already sending down a continued channel, there may be further | |
3139 | addresses not yet delivered that are aimed at the same host, but which have not | |
3140 | been passed in this run of the transport. In this case, continue_more will be | |
3141 | true, and all we should do is send RSET if necessary, and return, leaving the | |
3142 | channel open. | |
3143 | ||
3144 | However, if no address was disposed of, i.e. all addresses got 4xx errors, we | |
3145 | do not want to continue with other messages down the same channel, because that | |
3146 | can lead to looping between two or more messages, all with the same, | |
3147 | temporarily failing address(es). [The retry information isn't updated yet, so | |
3148 | new processes keep on trying.] We probably also don't want to try more of this | |
3149 | message's addresses either. | |
3150 | ||
3151 | If we have started a TLS session, we have to end it before passing the | |
3152 | connection to a new process. However, not all servers can handle this (Exim | |
3153 | can), so we do not pass such a connection on if the host matches | |
3154 | hosts_nopass_tls. */ | |
3155 | ||
3156 | DEBUG(D_transport) | |
3157 | debug_printf("ok=%d send_quit=%d send_rset=%d continue_more=%d " | |
d093f8e5 | 3158 | "yield=%d first_address is %sNULL\n", sx.ok, sx.send_quit, |
d9c3c8ed | 3159 | sx.send_rset, continue_more, yield, sx.first_addr ? "not " : ""); |
0756eb3c | 3160 | |
d9c3c8ed | 3161 | if (sx.completed_addr && sx.ok && sx.send_quit) |
0756eb3c PH |
3162 | { |
3163 | BOOL more; | |
a39bd74d JB |
3164 | smtp_compare_t t_compare; |
3165 | ||
3166 | t_compare.tblock = tblock; | |
3167 | t_compare.current_sender_address = sender_address; | |
3168 | ||
d9c3c8ed | 3169 | if ( sx.first_addr != NULL |
5130845b JH |
3170 | || continue_more |
3171 | || ( ( tls_out.active < 0 | |
d093f8e5 | 3172 | || verify_check_given_host(&sx.ob->hosts_nopass_tls, host) != OK |
5130845b | 3173 | ) |
0756eb3c PH |
3174 | && |
3175 | transport_check_waiting(tblock->name, host->name, | |
a39bd74d JB |
3176 | tblock->connection_max_messages, new_message_id, &more, |
3177 | (oicf)smtp_are_same_identities, (void*)&t_compare) | |
5130845b | 3178 | ) ) |
0756eb3c PH |
3179 | { |
3180 | uschar *msg; | |
447d236c | 3181 | BOOL pass_message; |
0756eb3c | 3182 | |
d093f8e5 JH |
3183 | if (sx.send_rset) |
3184 | if (! (sx.ok = smtp_write_command(&sx.outblock, FALSE, "RSET\r\n") >= 0)) | |
0756eb3c PH |
3185 | { |
3186 | msg = US string_sprintf("send() to %s [%s] failed: %s", host->name, | |
9e7e0f6a | 3187 | host->address, strerror(errno)); |
d093f8e5 | 3188 | sx.send_quit = FALSE; |
0756eb3c | 3189 | } |
d093f8e5 JH |
3190 | else if (! (sx.ok = smtp_read_response(&sx.inblock, sx.buffer, |
3191 | sizeof(sx.buffer), '2', sx.ob->command_timeout))) | |
0756eb3c PH |
3192 | { |
3193 | int code; | |
d093f8e5 | 3194 | sx.send_quit = check_response(host, &errno, 0, sx.buffer, &code, &msg, |
447d236c | 3195 | &pass_message); |
d093f8e5 | 3196 | if (!sx.send_quit) |
0756eb3c | 3197 | { |
c562fd30 JH |
3198 | DEBUG(D_transport) debug_printf("H=%s [%s] %s\n", |
3199 | host->name, host->address, msg); | |
0756eb3c PH |
3200 | } |
3201 | } | |
0756eb3c PH |
3202 | |
3203 | /* Either RSET was not needed, or it succeeded */ | |
3204 | ||
d093f8e5 | 3205 | if (sx.ok) |
0756eb3c | 3206 | { |
d9c3c8ed | 3207 | if (sx.first_addr != NULL) /* More addresses still to be sent */ |
0756eb3c PH |
3208 | { /* in this run of the transport */ |
3209 | continue_sequence++; /* Causes * in logging */ | |
3210 | goto SEND_MESSAGE; | |
3211 | } | |
3212 | if (continue_more) return yield; /* More addresses for another run */ | |
3213 | ||
3214 | /* Pass the socket to a new Exim process. Before doing so, we must shut | |
3215 | down TLS. Not all MTAs allow for the continuation of the SMTP session | |
3216 | when TLS is shut down. We test for this by sending a new EHLO. If we | |
3217 | don't get a good response, we don't attempt to pass the socket on. */ | |
3218 | ||
a7538db1 | 3219 | #ifdef SUPPORT_TLS |
817d9f57 | 3220 | if (tls_out.active >= 0) |
0756eb3c | 3221 | { |
817d9f57 | 3222 | tls_close(FALSE, TRUE); |
2d14f397 | 3223 | smtp_peer_options = smtp_peer_options_wrap; |
d093f8e5 JH |
3224 | sx.ok = !sx.smtps |
3225 | && smtp_write_command(&sx.outblock, FALSE, | |
3226 | "EHLO %s\r\n", sx.helo_data) >= 0 | |
3227 | && smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), | |
3228 | '2', sx.ob->command_timeout); | |
0756eb3c | 3229 | } |
a7538db1 | 3230 | #endif |
0756eb3c | 3231 | |
4c04137d | 3232 | /* If the socket is successfully passed, we mustn't send QUIT (or |
0756eb3c PH |
3233 | indeed anything!) from here. */ |
3234 | ||
895fbaf2 JH |
3235 | /*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to |
3236 | propagate it from the initial | |
3237 | */ | |
d093f8e5 JH |
3238 | if (sx.ok && transport_pass_socket(tblock->name, host->name, |
3239 | host->address, new_message_id, sx.inblock.sock)) | |
3240 | sx.send_quit = FALSE; | |
0756eb3c PH |
3241 | } |
3242 | ||
3243 | /* If RSET failed and there are addresses left, they get deferred. */ | |
3244 | ||
d9c3c8ed | 3245 | else set_errno(sx.first_addr, errno, msg, DEFER, FALSE, host |
895fbaf2 | 3246 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 3247 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3248 | #endif |
3249 | ); | |
0756eb3c PH |
3250 | } |
3251 | } | |
3252 | ||
3253 | /* End off tidily with QUIT unless the connection has died or the socket has | |
3254 | been passed to another process. There has been discussion on the net about what | |
3255 | to do after sending QUIT. The wording of the RFC suggests that it is necessary | |
3256 | to wait for a response, but on the other hand, there isn't anything one can do | |
3257 | with an error response, other than log it. Exim used to do that. However, | |
3258 | further discussion suggested that it is positively advantageous not to wait for | |
3259 | the response, but to close the session immediately. This is supposed to move | |
3260 | the TCP/IP TIME_WAIT state from the server to the client, thereby removing some | |
3261 | load from the server. (Hosts that are both servers and clients may not see much | |
3262 | difference, of course.) Further discussion indicated that this was safe to do | |
3263 | on Unix systems which have decent implementations of TCP/IP that leave the | |
3264 | connection around for a while (TIME_WAIT) after the application has gone away. | |
3265 | This enables the response sent by the server to be properly ACKed rather than | |
3266 | timed out, as can happen on broken TCP/IP implementations on other OS. | |
3267 | ||
3268 | This change is being made on 31-Jul-98. After over a year of trouble-free | |
3269 | operation, the old commented-out code was removed on 17-Sep-99. */ | |
3270 | ||
3271 | SEND_QUIT: | |
d093f8e5 | 3272 | if (sx.send_quit) (void)smtp_write_command(&sx.outblock, FALSE, "QUIT\r\n"); |
0756eb3c PH |
3273 | |
3274 | END_OFF: | |
3275 | ||
3276 | #ifdef SUPPORT_TLS | |
817d9f57 | 3277 | tls_close(FALSE, TRUE); |
0756eb3c PH |
3278 | #endif |
3279 | ||
3280 | /* Close the socket, and return the appropriate value, first setting | |
0756eb3c PH |
3281 | works because the NULL setting is passed back to the calling process, and |
3282 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
3283 | ||
3284 | If all went well and continue_more is set, we shouldn't actually get here if | |
3285 | there are further addresses, as the return above will be taken. However, | |
3286 | writing RSET might have failed, or there may be other addresses whose hosts are | |
3287 | specified in the transports, and therefore not visible at top level, in which | |
3288 | case continue_more won't get set. */ | |
3289 | ||
b9d9c5a2 | 3290 | HDEBUG(D_transport|D_acl|D_v) debug_printf(" SMTP(close)>>\n"); |
d093f8e5 | 3291 | if (sx.send_quit) |
60d10ce7 | 3292 | { |
d093f8e5 JH |
3293 | shutdown(sx.outblock.sock, SHUT_WR); |
3294 | if (fcntl(sx.inblock.sock, F_SETFL, O_NONBLOCK) == 0) | |
3295 | for (rc = 16; read(sx.inblock.sock, sx.inbuffer, sizeof(sx.inbuffer)) > 0 && rc > 0;) | |
5ddc9771 | 3296 | rc--; /* drain socket */ |
60d10ce7 | 3297 | } |
d093f8e5 | 3298 | (void)close(sx.inblock.sock); |
a7538db1 | 3299 | |
0cbf2b82 | 3300 | #ifndef DISABLE_EVENT |
774ef2d7 | 3301 | (void) event_raise(tblock->event_action, US"tcp:close", NULL); |
a7538db1 JH |
3302 | #endif |
3303 | ||
0756eb3c PH |
3304 | continue_transport = NULL; |
3305 | continue_hostname = NULL; | |
3306 | return yield; | |
3307 | } | |
3308 | ||
3309 | ||
3310 | ||
3311 | ||
3312 | /************************************************* | |
3313 | * Closedown entry point * | |
3314 | *************************************************/ | |
3315 | ||
3316 | /* This function is called when exim is passed an open smtp channel | |
3317 | from another incarnation, but the message which it has been asked | |
3318 | to deliver no longer exists. The channel is on stdin. | |
3319 | ||
3320 | We might do fancy things like looking for another message to send down | |
3321 | the channel, but if the one we sought has gone, it has probably been | |
3322 | delivered by some other process that itself will seek further messages, | |
3323 | so just close down our connection. | |
3324 | ||
3325 | Argument: pointer to the transport instance block | |
3326 | Returns: nothing | |
3327 | */ | |
3328 | ||
3329 | void | |
3330 | smtp_transport_closedown(transport_instance *tblock) | |
3331 | { | |
3332 | smtp_transport_options_block *ob = | |
02b41d71 | 3333 | (smtp_transport_options_block *)tblock->options_block; |
0756eb3c PH |
3334 | smtp_inblock inblock; |
3335 | smtp_outblock outblock; | |
3336 | uschar buffer[256]; | |
3337 | uschar inbuffer[4096]; | |
3338 | uschar outbuffer[16]; | |
3339 | ||
3340 | inblock.sock = fileno(stdin); | |
3341 | inblock.buffer = inbuffer; | |
3342 | inblock.buffersize = sizeof(inbuffer); | |
3343 | inblock.ptr = inbuffer; | |
3344 | inblock.ptrend = inbuffer; | |
3345 | ||
3346 | outblock.sock = inblock.sock; | |
3347 | outblock.buffersize = sizeof(outbuffer); | |
3348 | outblock.buffer = outbuffer; | |
3349 | outblock.ptr = outbuffer; | |
3350 | outblock.cmd_count = 0; | |
3351 | outblock.authenticating = FALSE; | |
3352 | ||
3353 | (void)smtp_write_command(&outblock, FALSE, "QUIT\r\n"); | |
3354 | (void)smtp_read_response(&inblock, buffer, sizeof(buffer), '2', | |
3355 | ob->command_timeout); | |
f1e894f3 | 3356 | (void)close(inblock.sock); |
0756eb3c PH |
3357 | } |
3358 | ||
3359 | ||
3360 | ||
3361 | /************************************************* | |
3362 | * Prepare addresses for delivery * | |
3363 | *************************************************/ | |
3364 | ||
3365 | /* This function is called to flush out error settings from previous delivery | |
3366 | attempts to other hosts. It also records whether we got here via an MX record | |
3367 | or not in the more_errno field of the address. We are interested only in | |
3368 | addresses that are still marked DEFER - others may have got delivered to a | |
3369 | previously considered IP address. Set their status to PENDING_DEFER to indicate | |
3370 | which ones are relevant this time. | |
3371 | ||
3372 | Arguments: | |
3373 | addrlist the list of addresses | |
3374 | host the host we are delivering to | |
3375 | ||
3376 | Returns: the first address for this delivery | |
3377 | */ | |
3378 | ||
3379 | static address_item * | |
3380 | prepare_addresses(address_item *addrlist, host_item *host) | |
3381 | { | |
3382 | address_item *first_addr = NULL; | |
3383 | address_item *addr; | |
7b4c8c1f | 3384 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b JH |
3385 | if (addr->transport_return == DEFER) |
3386 | { | |
7b4c8c1f | 3387 | if (!first_addr) first_addr = addr; |
168dec3b JH |
3388 | addr->transport_return = PENDING_DEFER; |
3389 | addr->basic_errno = 0; | |
3390 | addr->more_errno = (host->mx >= 0)? 'M' : 'A'; | |
3391 | addr->message = NULL; | |
a7538db1 | 3392 | #ifdef SUPPORT_TLS |
168dec3b JH |
3393 | addr->cipher = NULL; |
3394 | addr->ourcert = NULL; | |
3395 | addr->peercert = NULL; | |
3396 | addr->peerdn = NULL; | |
3397 | addr->ocsp = OCSP_NOT_REQ; | |
895fbaf2 JH |
3398 | #endif |
3399 | #ifdef EXPERIMENTAL_DSN_INFO | |
3400 | addr->smtp_greeting = NULL; | |
3401 | addr->helo_response = NULL; | |
a7538db1 | 3402 | #endif |
168dec3b | 3403 | } |
0756eb3c PH |
3404 | return first_addr; |
3405 | } | |
3406 | ||
3407 | ||
3408 | ||
3409 | /************************************************* | |
3410 | * Main entry point * | |
3411 | *************************************************/ | |
3412 | ||
3413 | /* See local README for interface details. As this is a remote transport, it is | |
3414 | given a chain of addresses to be delivered in one connection, if possible. It | |
3415 | always returns TRUE, indicating that each address has its own independent | |
3416 | status set, except if there is a setting up problem, in which case it returns | |
3417 | FALSE. */ | |
3418 | ||
3419 | BOOL | |
3420 | smtp_transport_entry( | |
3421 | transport_instance *tblock, /* data for this instantiation */ | |
3422 | address_item *addrlist) /* addresses we are working on */ | |
3423 | { | |
3424 | int cutoff_retry; | |
3425 | int port; | |
3426 | int hosts_defer = 0; | |
3427 | int hosts_fail = 0; | |
3428 | int hosts_looked_up = 0; | |
3429 | int hosts_retry = 0; | |
3430 | int hosts_serial = 0; | |
3431 | int hosts_total = 0; | |
8e669ac1 | 3432 | int total_hosts_tried = 0; |
0756eb3c PH |
3433 | address_item *addr; |
3434 | BOOL expired = TRUE; | |
0756eb3c PH |
3435 | uschar *expanded_hosts = NULL; |
3436 | uschar *pistring; | |
3437 | uschar *tid = string_sprintf("%s transport", tblock->name); | |
3438 | smtp_transport_options_block *ob = | |
3439 | (smtp_transport_options_block *)(tblock->options_block); | |
3440 | host_item *hostlist = addrlist->host_list; | |
3441 | host_item *host = NULL; | |
3442 | ||
3443 | DEBUG(D_transport) | |
3444 | { | |
3445 | debug_printf("%s transport entered\n", tblock->name); | |
7b4c8c1f | 3446 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c | 3447 | debug_printf(" %s\n", addr->address); |
7b4c8c1f JH |
3448 | if (hostlist) |
3449 | { | |
3450 | debug_printf("hostlist:\n"); | |
3451 | for (host = hostlist; host; host = host->next) | |
3452 | debug_printf(" %s:%d\n", host->name, host->port); | |
3453 | } | |
3454 | if (continue_hostname) debug_printf("already connected to %s [%s]\n", | |
0756eb3c PH |
3455 | continue_hostname, continue_host_address); |
3456 | } | |
3457 | ||
f6c332bd PH |
3458 | /* Set the flag requesting that these hosts be added to the waiting |
3459 | database if the delivery fails temporarily or if we are running with | |
3460 | queue_smtp or a 2-stage queue run. This gets unset for certain | |
3461 | kinds of error, typically those that are specific to the message. */ | |
3462 | ||
3463 | update_waiting = TRUE; | |
3464 | ||
0756eb3c PH |
3465 | /* If a host list is not defined for the addresses - they must all have the |
3466 | same one in order to be passed to a single transport - or if the transport has | |
3467 | a host list with hosts_override set, use the host list supplied with the | |
3468 | transport. It is an error for this not to exist. */ | |
3469 | ||
7b4c8c1f | 3470 | if (!hostlist || (ob->hosts_override && ob->hosts)) |
0756eb3c | 3471 | { |
7b4c8c1f | 3472 | if (!ob->hosts) |
0756eb3c PH |
3473 | { |
3474 | addrlist->message = string_sprintf("%s transport called with no hosts set", | |
3475 | tblock->name); | |
3476 | addrlist->transport_return = PANIC; | |
3477 | return FALSE; /* Only top address has status */ | |
3478 | } | |
3479 | ||
3480 | DEBUG(D_transport) debug_printf("using the transport's hosts: %s\n", | |
3481 | ob->hosts); | |
3482 | ||
3483 | /* If the transport's host list contains no '$' characters, and we are not | |
3484 | randomizing, it is fixed and therefore a chain of hosts can be built once | |
3485 | and for all, and remembered for subsequent use by other calls to this | |
3486 | transport. If, on the other hand, the host list does contain '$', or we are | |
3487 | randomizing its order, we have to rebuild it each time. In the fixed case, | |
3488 | as the hosts string will never be used again, it doesn't matter that we | |
3489 | replace all the : characters with zeros. */ | |
3490 | ||
7b4c8c1f | 3491 | if (!ob->hostlist) |
0756eb3c PH |
3492 | { |
3493 | uschar *s = ob->hosts; | |
3494 | ||
3495 | if (Ustrchr(s, '$') != NULL) | |
3496 | { | |
d427a7f9 | 3497 | if (!(expanded_hosts = expand_string(s))) |
0756eb3c PH |
3498 | { |
3499 | addrlist->message = string_sprintf("failed to expand list of hosts " | |
3500 | "\"%s\" in %s transport: %s", s, tblock->name, expand_string_message); | |
7b4c8c1f | 3501 | addrlist->transport_return = search_find_defer ? DEFER : PANIC; |
0756eb3c PH |
3502 | return FALSE; /* Only top address has status */ |
3503 | } | |
3504 | DEBUG(D_transport) debug_printf("expanded list of hosts \"%s\" to " | |
3505 | "\"%s\"\n", s, expanded_hosts); | |
3506 | s = expanded_hosts; | |
3507 | } | |
3508 | else | |
3509 | if (ob->hosts_randomize) s = expanded_hosts = string_copy(s); | |
3510 | ||
3511 | host_build_hostlist(&hostlist, s, ob->hosts_randomize); | |
3512 | ||
e276e04b | 3513 | /* Check that the expansion yielded something useful. */ |
7b4c8c1f | 3514 | if (!hostlist) |
e276e04b TF |
3515 | { |
3516 | addrlist->message = | |
3517 | string_sprintf("%s transport has empty hosts setting", tblock->name); | |
3518 | addrlist->transport_return = PANIC; | |
3519 | return FALSE; /* Only top address has status */ | |
3520 | } | |
3521 | ||
0756eb3c PH |
3522 | /* If there was no expansion of hosts, save the host list for |
3523 | next time. */ | |
3524 | ||
d427a7f9 | 3525 | if (!expanded_hosts) ob->hostlist = hostlist; |
0756eb3c PH |
3526 | } |
3527 | ||
3528 | /* This is not the first time this transport has been run in this delivery; | |
3529 | the host list was built previously. */ | |
3530 | ||
55414b25 JH |
3531 | else |
3532 | hostlist = ob->hostlist; | |
0756eb3c PH |
3533 | } |
3534 | ||
3535 | /* The host list was supplied with the address. If hosts_randomize is set, we | |
3536 | must sort it into a random order if it did not come from MX records and has not | |
3537 | already been randomized (but don't bother if continuing down an existing | |
3538 | connection). */ | |
3539 | ||
7b4c8c1f | 3540 | else if (ob->hosts_randomize && hostlist->mx == MX_NONE && !continue_hostname) |
0756eb3c PH |
3541 | { |
3542 | host_item *newlist = NULL; | |
7b4c8c1f | 3543 | while (hostlist) |
0756eb3c PH |
3544 | { |
3545 | host_item *h = hostlist; | |
3546 | hostlist = hostlist->next; | |
3547 | ||
3548 | h->sort_key = random_number(100); | |
3549 | ||
7b4c8c1f | 3550 | if (!newlist) |
0756eb3c PH |
3551 | { |
3552 | h->next = NULL; | |
3553 | newlist = h; | |
3554 | } | |
3555 | else if (h->sort_key < newlist->sort_key) | |
3556 | { | |
3557 | h->next = newlist; | |
3558 | newlist = h; | |
3559 | } | |
3560 | else | |
3561 | { | |
3562 | host_item *hh = newlist; | |
7b4c8c1f | 3563 | while (hh->next) |
0756eb3c PH |
3564 | { |
3565 | if (h->sort_key < hh->next->sort_key) break; | |
3566 | hh = hh->next; | |
3567 | } | |
3568 | h->next = hh->next; | |
3569 | hh->next = h; | |
3570 | } | |
3571 | } | |
3572 | ||
3573 | hostlist = addrlist->host_list = newlist; | |
3574 | } | |
3575 | ||
2d280592 | 3576 | /* Sort out the default port. */ |
0756eb3c PH |
3577 | |
3578 | if (!smtp_get_port(ob->port, addrlist, &port, tid)) return FALSE; | |
0756eb3c | 3579 | |
0756eb3c PH |
3580 | /* For each host-plus-IP-address on the list: |
3581 | ||
3582 | . If this is a continued delivery and the host isn't the one with the | |
3583 | current connection, skip. | |
3584 | ||
3585 | . If the status is unusable (i.e. previously failed or retry checked), skip. | |
3586 | ||
3587 | . If no IP address set, get the address, either by turning the name into | |
3588 | an address, calling gethostbyname if gethostbyname is on, or by calling | |
3589 | the DNS. The DNS may yield multiple addresses, in which case insert the | |
3590 | extra ones into the list. | |
3591 | ||
3592 | . Get the retry data if not previously obtained for this address and set the | |
3593 | field which remembers the state of this address. Skip if the retry time is | |
3594 | not reached. If not, remember whether retry data was found. The retry string | |
3595 | contains both the name and the IP address. | |
3596 | ||
3597 | . Scan the list of addresses and mark those whose status is DEFER as | |
3598 | PENDING_DEFER. These are the only ones that will be processed in this cycle | |
3599 | of the hosts loop. | |
3600 | ||
3601 | . Make a delivery attempt - addresses marked PENDING_DEFER will be tried. | |
3602 | Some addresses may be successfully delivered, others may fail, and yet | |
3603 | others may get temporary errors and so get marked DEFER. | |
3604 | ||
3605 | . The return from the delivery attempt is OK if a connection was made and a | |
3606 | valid SMTP dialogue was completed. Otherwise it is DEFER. | |
3607 | ||
3608 | . If OK, add a "remove" retry item for this host/IPaddress, if any. | |
3609 | ||
3610 | . If fail to connect, or other defer state, add a retry item. | |
3611 | ||
3612 | . If there are any addresses whose status is still DEFER, carry on to the | |
3613 | next host/IPaddress, unless we have tried the number of hosts given | |
533244af | 3614 | by hosts_max_try or hosts_max_try_hardlimit; otherwise return. Note that |
8e669ac1 PH |
3615 | there is some fancy logic for hosts_max_try that means its limit can be |
3616 | overstepped in some circumstances. | |
0756eb3c PH |
3617 | |
3618 | If we get to the end of the list, all hosts have deferred at least one address, | |
3619 | or not reached their retry times. If delay_after_cutoff is unset, it requests a | |
3620 | delivery attempt to those hosts whose last try was before the arrival time of | |
3621 | the current message. To cope with this, we have to go round the loop a second | |
3622 | time. After that, set the status and error data for any addresses that haven't | |
3623 | had it set already. */ | |
3624 | ||
7b4c8c1f JH |
3625 | for (cutoff_retry = 0; |
3626 | expired && cutoff_retry < (ob->delay_after_cutoff ? 1 : 2); | |
0756eb3c PH |
3627 | cutoff_retry++) |
3628 | { | |
3629 | host_item *nexthost = NULL; | |
3630 | int unexpired_hosts_tried = 0; | |
3631 | ||
3632 | for (host = hostlist; | |
7b4c8c1f JH |
3633 | host |
3634 | && unexpired_hosts_tried < ob->hosts_max_try | |
3635 | && total_hosts_tried < ob->hosts_max_try_hardlimit; | |
0756eb3c PH |
3636 | host = nexthost) |
3637 | { | |
3638 | int rc; | |
3639 | int host_af; | |
3640 | uschar *rs; | |
0756eb3c PH |
3641 | BOOL host_is_expired = FALSE; |
3642 | BOOL message_defer = FALSE; | |
0756eb3c PH |
3643 | BOOL some_deferred = FALSE; |
3644 | address_item *first_addr = NULL; | |
3645 | uschar *interface = NULL; | |
3646 | uschar *retry_host_key = NULL; | |
3647 | uschar *retry_message_key = NULL; | |
3648 | uschar *serialize_key = NULL; | |
3649 | ||
9c4e8f60 PH |
3650 | /* Default next host is next host. :-) But this can vary if the |
3651 | hosts_max_try limit is hit (see below). It may also be reset if a host | |
3652 | address is looked up here (in case the host was multihomed). */ | |
3653 | ||
3654 | nexthost = host->next; | |
3655 | ||
0756eb3c PH |
3656 | /* If the address hasn't yet been obtained from the host name, look it up |
3657 | now, unless the host is already marked as unusable. If it is marked as | |
3658 | unusable, it means that the router was unable to find its IP address (in | |
3659 | the DNS or wherever) OR we are in the 2nd time round the cutoff loop, and | |
3660 | the lookup failed last time. We don't get this far if *all* MX records | |
3661 | point to non-existent hosts; that is treated as a hard error. | |
3662 | ||
3663 | We can just skip this host entirely. When the hosts came from the router, | |
3664 | the address will timeout based on the other host(s); when the address is | |
3665 | looked up below, there is an explicit retry record added. | |
3666 | ||
3667 | Note that we mustn't skip unusable hosts if the address is not unset; they | |
3668 | may be needed as expired hosts on the 2nd time round the cutoff loop. */ | |
3669 | ||
7b4c8c1f | 3670 | if (!host->address) |
0756eb3c | 3671 | { |
322050c2 | 3672 | int new_port, flags; |
7cd1141b | 3673 | host_item *hh; |
0756eb3c PH |
3674 | |
3675 | if (host->status >= hstatus_unusable) | |
3676 | { | |
3677 | DEBUG(D_transport) debug_printf("%s has no address and is unusable - skipping\n", | |
3678 | host->name); | |
3679 | continue; | |
3680 | } | |
3681 | ||
3682 | DEBUG(D_transport) debug_printf("getting address for %s\n", host->name); | |
3683 | ||
7cd1141b PH |
3684 | /* The host name is permitted to have an attached port. Find it, and |
3685 | strip it from the name. Just remember it for now. */ | |
3686 | ||
3687 | new_port = host_item_get_port(host); | |
3688 | ||
3689 | /* Count hosts looked up */ | |
3690 | ||
0756eb3c PH |
3691 | hosts_looked_up++; |
3692 | ||
3693 | /* Find by name if so configured, or if it's an IP address. We don't | |
3694 | just copy the IP address, because we need the test-for-local to happen. */ | |
3695 | ||
322050c2 PH |
3696 | flags = HOST_FIND_BY_A; |
3697 | if (ob->dns_qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE; | |
3698 | if (ob->dns_search_parents) flags |= HOST_FIND_SEARCH_PARENTS; | |
3699 | ||
7e66e54d | 3700 | if (ob->gethostbyname || string_is_ip_address(host->name, NULL) != 0) |
55414b25 | 3701 | rc = host_find_byname(host, NULL, flags, NULL, TRUE); |
0756eb3c | 3702 | else |
0756eb3c | 3703 | rc = host_find_bydns(host, NULL, flags, NULL, NULL, NULL, |
7cd171b7 | 3704 | &ob->dnssec, /* domains for request/require */ |
55414b25 | 3705 | NULL, NULL); |
0756eb3c | 3706 | |
7cd1141b PH |
3707 | /* Update the host (and any additional blocks, resulting from |
3708 | multihoming) with a host-specific port, if any. */ | |
3709 | ||
3710 | for (hh = host; hh != nexthost; hh = hh->next) hh->port = new_port; | |
3711 | ||
0756eb3c PH |
3712 | /* Failure to find the host at this time (usually DNS temporary failure) |
3713 | is really a kind of routing failure rather than a transport failure. | |
3714 | Therefore we add a retry item of the routing kind, not to stop us trying | |
3715 | to look this name up here again, but to ensure the address gets timed | |
3716 | out if the failures go on long enough. A complete failure at this point | |
3717 | commonly points to a configuration error, but the best action is still | |
3718 | to carry on for the next host. */ | |
3719 | ||
3720 | if (rc == HOST_FIND_AGAIN || rc == HOST_FIND_FAILED) | |
3721 | { | |
3722 | retry_add_item(addrlist, string_sprintf("R:%s", host->name), 0); | |
3723 | expired = FALSE; | |
3724 | if (rc == HOST_FIND_AGAIN) hosts_defer++; else hosts_fail++; | |
3725 | DEBUG(D_transport) debug_printf("rc = %s for %s\n", (rc == HOST_FIND_AGAIN)? | |
3726 | "HOST_FIND_AGAIN" : "HOST_FIND_FAILED", host->name); | |
3727 | host->status = hstatus_unusable; | |
3728 | ||
7b4c8c1f | 3729 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
3730 | { |
3731 | if (addr->transport_return != DEFER) continue; | |
3732 | addr->basic_errno = ERRNO_UNKNOWNHOST; | |
3733 | addr->message = | |
3734 | string_sprintf("failed to lookup IP address for %s", host->name); | |
3735 | } | |
3736 | continue; | |
3737 | } | |
3738 | ||
3739 | /* If the host is actually the local host, we may have a problem, or | |
3740 | there may be some cunning configuration going on. In the problem case, | |
3741 | log things and give up. The default transport status is already DEFER. */ | |
3742 | ||
3743 | if (rc == HOST_FOUND_LOCAL && !ob->allow_localhost) | |
3744 | { | |
7b4c8c1f | 3745 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
3746 | { |
3747 | addr->basic_errno = 0; | |
3748 | addr->message = string_sprintf("%s transport found host %s to be " | |
3749 | "local", tblock->name, host->name); | |
3750 | } | |
3751 | goto END_TRANSPORT; | |
3752 | } | |
3753 | } /* End of block for IP address lookup */ | |
3754 | ||
3755 | /* If this is a continued delivery, we are interested only in the host | |
3756 | which matches the name of the existing open channel. The check is put | |
3757 | here after the local host lookup, in case the name gets expanded as a | |
3758 | result of the lookup. Set expired FALSE, to save the outer loop executing | |
3759 | twice. */ | |
3760 | ||
7b4c8c1f JH |
3761 | if ( continue_hostname |
3762 | && ( Ustrcmp(continue_hostname, host->name) != 0 | |
3763 | || Ustrcmp(continue_host_address, host->address) != 0 | |
3764 | ) ) | |
0756eb3c PH |
3765 | { |
3766 | expired = FALSE; | |
3767 | continue; /* With next host */ | |
3768 | } | |
3769 | ||
9c4e8f60 PH |
3770 | /* Reset the default next host in case a multihomed host whose addresses |
3771 | are not looked up till just above added to the host list. */ | |
83364d30 PH |
3772 | |
3773 | nexthost = host->next; | |
3774 | ||
0756eb3c PH |
3775 | /* If queue_smtp is set (-odqs or the first part of a 2-stage run), or the |
3776 | domain is in queue_smtp_domains, we don't actually want to attempt any | |
3777 | deliveries. When doing a queue run, queue_smtp_domains is always unset. If | |
3778 | there is a lookup defer in queue_smtp_domains, proceed as if the domain | |
3779 | were not in it. We don't want to hold up all SMTP deliveries! Except when | |
3780 | doing a two-stage queue run, don't do this if forcing. */ | |
3781 | ||
3782 | if ((!deliver_force || queue_2stage) && (queue_smtp || | |
55414b25 JH |
3783 | match_isinlist(addrlist->domain, |
3784 | (const uschar **)&queue_smtp_domains, 0, | |
cf39cf57 | 3785 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)) |
0756eb3c PH |
3786 | { |
3787 | expired = FALSE; | |
7b4c8c1f JH |
3788 | for (addr = addrlist; addr; addr = addr->next) |
3789 | if (addr->transport_return == DEFER) | |
3790 | addr->message = US"domain matches queue_smtp_domains, or -odqs set"; | |
0756eb3c PH |
3791 | continue; /* With next host */ |
3792 | } | |
3793 | ||
3794 | /* Count hosts being considered - purely for an intelligent comment | |
3795 | if none are usable. */ | |
3796 | ||
3797 | hosts_total++; | |
3798 | ||
3799 | /* Set $host and $host address now in case they are needed for the | |
3800 | interface expansion or the serialize_hosts check; they remain set if an | |
3801 | actual delivery happens. */ | |
3802 | ||
3803 | deliver_host = host->name; | |
3804 | deliver_host_address = host->address; | |
783b385f JH |
3805 | lookup_dnssec_authenticated = host->dnssec == DS_YES ? US"yes" |
3806 | : host->dnssec == DS_NO ? US"no" | |
3807 | : US""; | |
0756eb3c | 3808 | |
7cd1141b PH |
3809 | /* Set up a string for adding to the retry key if the port number is not |
3810 | the standard SMTP port. A host may have its own port setting that overrides | |
3811 | the default. */ | |
3812 | ||
7b4c8c1f JH |
3813 | pistring = string_sprintf(":%d", host->port == PORT_NONE |
3814 | ? port : host->port); | |
7cd1141b PH |
3815 | if (Ustrcmp(pistring, ":25") == 0) pistring = US""; |
3816 | ||
0756eb3c | 3817 | /* Select IPv4 or IPv6, and choose an outgoing interface. If the interface |
6f6dedcc JH |
3818 | string is set, even if constant (as different transports can have different |
3819 | constant settings), we must add it to the key that is used for retries, | |
3820 | because connections to the same host from a different interface should be | |
3821 | treated separately. */ | |
0756eb3c | 3822 | |
7b4c8c1f | 3823 | host_af = Ustrchr(host->address, ':') == NULL ? AF_INET : AF_INET6; |
6f6dedcc JH |
3824 | if ((rs = ob->interface) && *rs) |
3825 | { | |
3826 | if (!smtp_get_interface(rs, host_af, addrlist, &interface, tid)) | |
3827 | return FALSE; | |
3828 | pistring = string_sprintf("%s/%s", pistring, interface); | |
3829 | } | |
0756eb3c PH |
3830 | |
3831 | /* The first time round the outer loop, check the status of the host by | |
3832 | inspecting the retry data. The second time round, we are interested only | |
3833 | in expired hosts that haven't been tried since this message arrived. */ | |
3834 | ||
3835 | if (cutoff_retry == 0) | |
3836 | { | |
9c695f6d | 3837 | BOOL incl_ip; |
0756eb3c | 3838 | /* Ensure the status of the address is set by checking retry data if |
9c695f6d | 3839 | necessary. There may be host-specific retry data (applicable to all |
0756eb3c PH |
3840 | messages) and also data for retries of a specific message at this host. |
3841 | If either of these retry records are actually read, the keys used are | |
3842 | returned to save recomputing them later. */ | |
3843 | ||
9c695f6d JH |
3844 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, |
3845 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
3846 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
3847 | continue; /* with next host */ | |
3848 | ||
0756eb3c | 3849 | host_is_expired = retry_check_address(addrlist->domain, host, pistring, |
9c695f6d | 3850 | incl_ip, &retry_host_key, &retry_message_key); |
0756eb3c PH |
3851 | |
3852 | DEBUG(D_transport) debug_printf("%s [%s]%s status = %s\n", host->name, | |
3853 | (host->address == NULL)? US"" : host->address, pistring, | |
3854 | (host->status == hstatus_usable)? "usable" : | |
3855 | (host->status == hstatus_unusable)? "unusable" : | |
3856 | (host->status == hstatus_unusable_expired)? "unusable (expired)" : "?"); | |
3857 | ||
3858 | /* Skip this address if not usable at this time, noting if it wasn't | |
3859 | actually expired, both locally and in the address. */ | |
3860 | ||
3861 | switch (host->status) | |
3862 | { | |
3863 | case hstatus_unusable: | |
7b4c8c1f JH |
3864 | expired = FALSE; |
3865 | setflag(addrlist, af_retry_skipped); | |
3866 | /* Fall through */ | |
0756eb3c PH |
3867 | |
3868 | case hstatus_unusable_expired: | |
7b4c8c1f JH |
3869 | switch (host->why) |
3870 | { | |
3871 | case hwhy_retry: hosts_retry++; break; | |
3872 | case hwhy_failed: hosts_fail++; break; | |
3873 | case hwhy_deferred: hosts_defer++; break; | |
3874 | } | |
3875 | ||
3876 | /* If there was a retry message key, implying that previously there | |
3877 | was a message-specific defer, we don't want to update the list of | |
3878 | messages waiting for these hosts. */ | |
3879 | ||
3880 | if (retry_message_key) update_waiting = FALSE; | |
3881 | continue; /* With the next host or IP address */ | |
0756eb3c PH |
3882 | } |
3883 | } | |
3884 | ||
3885 | /* Second time round the loop: if the address is set but expired, and | |
3886 | the message is newer than the last try, let it through. */ | |
3887 | ||
3888 | else | |
3889 | { | |
7b4c8c1f JH |
3890 | if ( !host->address |
3891 | || host->status != hstatus_unusable_expired | |
3892 | || host->last_try > received_time) | |
0756eb3c | 3893 | continue; |
7b4c8c1f | 3894 | DEBUG(D_transport) debug_printf("trying expired host %s [%s]%s\n", |
0756eb3c PH |
3895 | host->name, host->address, pistring); |
3896 | host_is_expired = TRUE; | |
3897 | } | |
3898 | ||
3899 | /* Setting "expired=FALSE" doesn't actually mean not all hosts are expired; | |
3900 | it remains TRUE only if all hosts are expired and none are actually tried. | |
3901 | */ | |
3902 | ||
3903 | expired = FALSE; | |
3904 | ||
3905 | /* If this host is listed as one to which access must be serialized, | |
3906 | see if another Exim process has a connection to it, and if so, skip | |
3907 | this host. If not, update the database to record our connection to it | |
3908 | and remember this for later deletion. Do not do any of this if we are | |
3909 | sending the message down a pre-existing connection. */ | |
3910 | ||
7b4c8c1f JH |
3911 | if ( !continue_hostname |
3912 | && verify_check_given_host(&ob->serialize_hosts, host) == OK) | |
0756eb3c PH |
3913 | { |
3914 | serialize_key = string_sprintf("host-serialize-%s", host->name); | |
e8ae7214 | 3915 | if (!enq_start(serialize_key, 1)) |
0756eb3c PH |
3916 | { |
3917 | DEBUG(D_transport) | |
3918 | debug_printf("skipping host %s because another Exim process " | |
3919 | "is connected to it\n", host->name); | |
3920 | hosts_serial++; | |
3921 | continue; | |
3922 | } | |
0756eb3c PH |
3923 | } |
3924 | ||
3925 | /* OK, we have an IP address that is not waiting for its retry time to | |
3926 | arrive (it might be expired) OR (second time round the loop) we have an | |
3927 | expired host that hasn't been tried since the message arrived. Have a go | |
3928 | at delivering the message to it. First prepare the addresses by flushing | |
3929 | out the result of previous attempts, and finding the first address that | |
3930 | is still to be delivered. */ | |
3931 | ||
3932 | first_addr = prepare_addresses(addrlist, host); | |
3933 | ||
3934 | DEBUG(D_transport) debug_printf("delivering %s to %s [%s] (%s%s)\n", | |
3935 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 3936 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
3937 | |
3938 | set_process_info("delivering %s to %s [%s] (%s%s)", | |
3939 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 3940 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
3941 | |
3942 | /* This is not for real; don't do the delivery. If there are | |
3943 | any remaining hosts, list them. */ | |
3944 | ||
3945 | if (dont_deliver) | |
3946 | { | |
3947 | host_item *host2; | |
895fbaf2 | 3948 | set_errno_nohost(addrlist, 0, NULL, OK, FALSE); |
7b4c8c1f | 3949 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
3950 | { |
3951 | addr->host_used = host; | |
3952 | addr->special_action = '*'; | |
3953 | addr->message = US"delivery bypassed by -N option"; | |
3954 | } | |
3955 | DEBUG(D_transport) | |
3956 | { | |
3957 | debug_printf("*** delivery by %s transport bypassed by -N option\n" | |
3958 | "*** host and remaining hosts:\n", tblock->name); | |
7b4c8c1f | 3959 | for (host2 = host; host2; host2 = host2->next) |
0756eb3c | 3960 | debug_printf(" %s [%s]\n", host2->name, |
7b4c8c1f | 3961 | host2->address ? host2->address : US"unset"); |
0756eb3c PH |
3962 | } |
3963 | rc = OK; | |
3964 | } | |
3965 | ||
3966 | /* This is for real. If the host is expired, we don't count it for | |
3967 | hosts_max_retry. This ensures that all hosts must expire before an address | |
8e669ac1 | 3968 | is timed out, unless hosts_max_try_hardlimit (which protects against |
533244af | 3969 | lunatic DNS configurations) is reached. |
8e669ac1 | 3970 | |
533244af PH |
3971 | If the host is not expired and we are about to hit the hosts_max_retry |
3972 | limit, check to see if there is a subsequent hosts with a different MX | |
3973 | value. If so, make that the next host, and don't count this one. This is a | |
3974 | heuristic to make sure that different MXs do get tried. With a normal kind | |
3975 | of retry rule, they would get tried anyway when the earlier hosts were | |
3976 | delayed, but if the domain has a "retry every time" type of rule - as is | |
3977 | often used for the the very large ISPs, that won't happen. */ | |
0756eb3c PH |
3978 | |
3979 | else | |
3980 | { | |
d427a7f9 JH |
3981 | host_item * thost; |
3982 | /* Make a copy of the host if it is local to this invocation | |
3983 | of the transport. */ | |
3984 | ||
3985 | if (expanded_hosts) | |
3986 | { | |
3987 | thost = store_get(sizeof(host_item)); | |
3988 | *thost = *host; | |
3989 | thost->name = string_copy(host->name); | |
3990 | thost->address = string_copy(host->address); | |
3991 | } | |
3992 | else | |
3993 | thost = host; | |
3994 | ||
0756eb3c PH |
3995 | if (!host_is_expired && ++unexpired_hosts_tried >= ob->hosts_max_try) |
3996 | { | |
3997 | host_item *h; | |
3998 | DEBUG(D_transport) | |
3999 | debug_printf("hosts_max_try limit reached with this host\n"); | |
1a47b633 JH |
4000 | for (h = host; h; h = h->next) if (h->mx != host->mx) |
4001 | { | |
4002 | nexthost = h; | |
4003 | unexpired_hosts_tried--; | |
4004 | DEBUG(D_transport) debug_printf("however, a higher MX host exists " | |
4005 | "and will be tried\n"); | |
4006 | break; | |
4007 | } | |
0756eb3c PH |
4008 | } |
4009 | ||
4010 | /* Attempt the delivery. */ | |
4011 | ||
533244af | 4012 | total_hosts_tried++; |
d427a7f9 JH |
4013 | rc = smtp_deliver(addrlist, thost, host_af, port, interface, tblock, |
4014 | &message_defer, FALSE); | |
0756eb3c PH |
4015 | |
4016 | /* Yield is one of: | |
4017 | OK => connection made, each address contains its result; | |
4018 | message_defer is set for message-specific defers (when all | |
4019 | recipients are marked defer) | |
4020 | DEFER => there was a non-message-specific delivery problem; | |
4021 | ERROR => there was a problem setting up the arguments for a filter, | |
4022 | or there was a problem with expanding added headers | |
4023 | */ | |
4024 | ||
4025 | /* If the result is not OK, there was a non-message-specific problem. | |
4026 | If the result is DEFER, we need to write to the logs saying what happened | |
4027 | for this particular host, except in the case of authentication and TLS | |
4028 | failures, where the log has already been written. If all hosts defer a | |
4029 | general message is written at the end. */ | |
4030 | ||
7b4c8c1f JH |
4031 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL |
4032 | && first_addr->basic_errno != ERRNO_TLSFAILURE) | |
0756eb3c PH |
4033 | write_logs(first_addr, host); |
4034 | ||
0cbf2b82 | 4035 | #ifndef DISABLE_EVENT |
d68218c7 | 4036 | if (rc == DEFER) |
774ef2d7 | 4037 | deferred_event_raise(first_addr, host); |
a7538db1 | 4038 | #endif |
d68218c7 | 4039 | |
0756eb3c PH |
4040 | /* If STARTTLS was accepted, but there was a failure in setting up the |
4041 | TLS session (usually a certificate screwup), and the host is not in | |
4042 | hosts_require_tls, and tls_tempfail_tryclear is true, try again, with | |
4043 | TLS forcibly turned off. We have to start from scratch with a new SMTP | |
4044 | connection. That's why the retry is done from here, not from within | |
4045 | smtp_deliver(). [Rejections of STARTTLS itself don't screw up the | |
4046 | session, so the in-clear transmission after those errors, if permitted, | |
4047 | happens inside smtp_deliver().] */ | |
4048 | ||
a7538db1 | 4049 | #ifdef SUPPORT_TLS |
7a31d643 JH |
4050 | if ( rc == DEFER |
4051 | && first_addr->basic_errno == ERRNO_TLSFAILURE | |
4052 | && ob->tls_tempfail_tryclear | |
5130845b | 4053 | && verify_check_given_host(&ob->hosts_require_tls, host) != OK |
7a31d643 | 4054 | ) |
0756eb3c PH |
4055 | { |
4056 | log_write(0, LOG_MAIN, "TLS session failure: delivering unencrypted " | |
4057 | "to %s [%s] (not in hosts_require_tls)", host->name, host->address); | |
4058 | first_addr = prepare_addresses(addrlist, host); | |
d427a7f9 JH |
4059 | rc = smtp_deliver(addrlist, thost, host_af, port, interface, tblock, |
4060 | &message_defer, TRUE); | |
0756eb3c PH |
4061 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL) |
4062 | write_logs(first_addr, host); | |
0cbf2b82 | 4063 | # ifndef DISABLE_EVENT |
d68218c7 | 4064 | if (rc == DEFER) |
774ef2d7 | 4065 | deferred_event_raise(first_addr, host); |
a7538db1 | 4066 | # endif |
0756eb3c | 4067 | } |
a1bccd48 | 4068 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
4069 | } |
4070 | ||
4071 | /* Delivery attempt finished */ | |
4072 | ||
7b4c8c1f JH |
4073 | rs = rc == OK ? US"OK" |
4074 | : rc == DEFER ? US"DEFER" | |
4075 | : rc == ERROR ? US"ERROR" | |
4076 | : US"?"; | |
0756eb3c PH |
4077 | |
4078 | set_process_info("delivering %s: just tried %s [%s] for %s%s: result %s", | |
4079 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4080 | addrlist->next ? " (& others)" : "", rs); |
0756eb3c PH |
4081 | |
4082 | /* Release serialization if set up */ | |
4083 | ||
7b4c8c1f | 4084 | if (serialize_key) enq_end(serialize_key); |
0756eb3c PH |
4085 | |
4086 | /* If the result is DEFER, or if a host retry record is known to exist, we | |
4087 | need to add an item to the retry chain for updating the retry database | |
4088 | at the end of delivery. We only need to add the item to the top address, | |
4089 | of course. Also, if DEFER, we mark the IP address unusable so as to skip it | |
4090 | for any other delivery attempts using the same address. (It is copied into | |
4091 | the unusable tree at the outer level, so even if different address blocks | |
4092 | contain the same address, it still won't get tried again.) */ | |
4093 | ||
7b4c8c1f | 4094 | if (rc == DEFER || retry_host_key) |
0756eb3c | 4095 | { |
7b4c8c1f JH |
4096 | int delete_flag = rc != DEFER ? rf_delete : 0; |
4097 | if (!retry_host_key) | |
0756eb3c | 4098 | { |
9c695f6d JH |
4099 | BOOL incl_ip; |
4100 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4101 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4102 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4103 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4104 | ||
7b4c8c1f JH |
4105 | retry_host_key = incl_ip |
4106 | ? string_sprintf("T:%S:%s%s", host->name, host->address, pistring) | |
4107 | : string_sprintf("T:%S%s", host->name, pistring); | |
0756eb3c PH |
4108 | } |
4109 | ||
4110 | /* If a delivery of another message over an existing SMTP connection | |
4111 | yields DEFER, we do NOT set up retry data for the host. This covers the | |
4112 | case when there are delays in routing the addresses in the second message | |
4113 | that are so long that the server times out. This is alleviated by not | |
4114 | routing addresses that previously had routing defers when handling an | |
4115 | existing connection, but even so, this case may occur (e.g. if a | |
4116 | previously happily routed address starts giving routing defers). If the | |
4117 | host is genuinely down, another non-continued message delivery will | |
4118 | notice it soon enough. */ | |
4119 | ||
7b4c8c1f | 4120 | if (delete_flag != 0 || !continue_hostname) |
0756eb3c PH |
4121 | retry_add_item(first_addr, retry_host_key, rf_host | delete_flag); |
4122 | ||
4123 | /* We may have tried an expired host, if its retry time has come; ensure | |
4124 | the status reflects the expiry for the benefit of any other addresses. */ | |
4125 | ||
4126 | if (rc == DEFER) | |
4127 | { | |
7b4c8c1f JH |
4128 | host->status = host_is_expired |
4129 | ? hstatus_unusable_expired : hstatus_unusable; | |
0756eb3c PH |
4130 | host->why = hwhy_deferred; |
4131 | } | |
4132 | } | |
4133 | ||
4134 | /* If message_defer is set (host was OK, but every recipient got deferred | |
4135 | because of some message-specific problem), or if that had happened | |
4136 | previously so that a message retry key exists, add an appropriate item | |
4137 | to the retry chain. Note that if there was a message defer but now there is | |
4138 | a host defer, the message defer record gets deleted. That seems perfectly | |
4139 | reasonable. Also, stop the message from being remembered as waiting | |
f6c332bd | 4140 | for specific hosts. */ |
0756eb3c | 4141 | |
7b4c8c1f | 4142 | if (message_defer || retry_message_key) |
0756eb3c | 4143 | { |
7b4c8c1f JH |
4144 | int delete_flag = message_defer ? 0 : rf_delete; |
4145 | if (!retry_message_key) | |
0756eb3c | 4146 | { |
9c695f6d JH |
4147 | BOOL incl_ip; |
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 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4152 | ||
7b4c8c1f JH |
4153 | retry_message_key = incl_ip |
4154 | ? string_sprintf("T:%S:%s%s:%s", host->name, host->address, pistring, | |
4155 | message_id) | |
4156 | : string_sprintf("T:%S%s:%s", host->name, pistring, message_id); | |
0756eb3c PH |
4157 | } |
4158 | retry_add_item(addrlist, retry_message_key, | |
4159 | rf_message | rf_host | delete_flag); | |
f6c332bd | 4160 | update_waiting = FALSE; |
0756eb3c PH |
4161 | } |
4162 | ||
4163 | /* Any return other than DEFER (that is, OK or ERROR) means that the | |
4164 | addresses have got their final statuses filled in for this host. In the OK | |
4165 | case, see if any of them are deferred. */ | |
4166 | ||
4167 | if (rc == OK) | |
4cea764f | 4168 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4169 | if (addr->transport_return == DEFER) |
4170 | { | |
4171 | some_deferred = TRUE; | |
4172 | break; | |
4173 | } | |
0756eb3c PH |
4174 | |
4175 | /* If no addresses deferred or the result was ERROR, return. We do this for | |
4176 | ERROR because a failing filter set-up or add_headers expansion is likely to | |
4177 | fail for any host we try. */ | |
4178 | ||
4179 | if (rc == ERROR || (rc == OK && !some_deferred)) | |
4180 | { | |
4181 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4182 | return TRUE; /* Each address has its status */ | |
4183 | } | |
4184 | ||
4185 | /* If the result was DEFER or some individual addresses deferred, let | |
4186 | the loop run to try other hosts with the deferred addresses, except for the | |
4187 | case when we were trying to deliver down an existing channel and failed. | |
4188 | Don't try any other hosts in this case. */ | |
4189 | ||
7b4c8c1f | 4190 | if (continue_hostname) break; |
0756eb3c PH |
4191 | |
4192 | /* If the whole delivery, or some individual addresses, were deferred and | |
4193 | there are more hosts that could be tried, do not count this host towards | |
4194 | the hosts_max_try limit if the age of the message is greater than the | |
4195 | maximum retry time for this host. This means we may try try all hosts, | |
4196 | ignoring the limit, when messages have been around for some time. This is | |
4197 | important because if we don't try all hosts, the address will never time | |
533244af | 4198 | out. NOTE: this does not apply to hosts_max_try_hardlimit. */ |
0756eb3c | 4199 | |
7b4c8c1f | 4200 | if ((rc == DEFER || some_deferred) && nexthost) |
0756eb3c PH |
4201 | { |
4202 | BOOL timedout; | |
4203 | retry_config *retry = retry_find_config(host->name, NULL, 0, 0); | |
4204 | ||
7b4c8c1f | 4205 | if (retry && retry->rules) |
0756eb3c PH |
4206 | { |
4207 | retry_rule *last_rule; | |
4208 | for (last_rule = retry->rules; | |
7b4c8c1f | 4209 | last_rule->next; |
0756eb3c PH |
4210 | last_rule = last_rule->next); |
4211 | timedout = time(NULL) - received_time > last_rule->timeout; | |
4212 | } | |
4213 | else timedout = TRUE; /* No rule => timed out */ | |
4214 | ||
4215 | if (timedout) | |
4216 | { | |
4217 | unexpired_hosts_tried--; | |
4218 | DEBUG(D_transport) debug_printf("temporary delivery error(s) override " | |
4219 | "hosts_max_try (message older than host's retry time)\n"); | |
4220 | } | |
4221 | } | |
4222 | } /* End of loop for trying multiple hosts. */ | |
4223 | ||
4224 | /* This is the end of the loop that repeats iff expired is TRUE and | |
4225 | ob->delay_after_cutoff is FALSE. The second time round we will | |
4226 | try those hosts that haven't been tried since the message arrived. */ | |
4227 | ||
4228 | DEBUG(D_transport) | |
4229 | { | |
4230 | debug_printf("all IP addresses skipped or deferred at least one address\n"); | |
4231 | if (expired && !ob->delay_after_cutoff && cutoff_retry == 0) | |
4232 | debug_printf("retrying IP addresses not tried since message arrived\n"); | |
4233 | } | |
4234 | } | |
4235 | ||
4236 | ||
4237 | /* Get here if all IP addresses are skipped or defer at least one address. In | |
4238 | MUA wrapper mode, this will happen only for connection or other non-message- | |
4239 | specific failures. Force the delivery status for all addresses to FAIL. */ | |
4240 | ||
4241 | if (mua_wrapper) | |
4242 | { | |
7b4c8c1f | 4243 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4244 | addr->transport_return = FAIL; |
4245 | goto END_TRANSPORT; | |
4246 | } | |
4247 | ||
4248 | /* In the normal, non-wrapper case, add a standard message to each deferred | |
4249 | address if there hasn't been an error, that is, if it hasn't actually been | |
4250 | tried this time. The variable "expired" will be FALSE if any deliveries were | |
4251 | actually tried, or if there was at least one host that was not expired. That | |
4252 | is, it is TRUE only if no deliveries were tried and all hosts were expired. If | |
4253 | a delivery has been tried, an error code will be set, and the failing of the | |
4254 | message is handled by the retry code later. | |
4255 | ||
4256 | If queue_smtp is set, or this transport was called to send a subsequent message | |
4257 | down an existing TCP/IP connection, and something caused the host not to be | |
4258 | found, we end up here, but can detect these cases and handle them specially. */ | |
4259 | ||
c3f2eb9a | 4260 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4261 | { |
4262 | /* If host is not NULL, it means that we stopped processing the host list | |
533244af PH |
4263 | because of hosts_max_try or hosts_max_try_hardlimit. In the former case, this |
4264 | means we need to behave as if some hosts were skipped because their retry | |
4265 | time had not come. Specifically, this prevents the address from timing out. | |
8e669ac1 | 4266 | However, if we have hit hosts_max_try_hardlimit, we want to behave as if all |
533244af | 4267 | hosts were tried. */ |
0756eb3c | 4268 | |
c3f2eb9a | 4269 | if (host) |
533244af PH |
4270 | if (total_hosts_tried >= ob->hosts_max_try_hardlimit) |
4271 | { | |
4272 | DEBUG(D_transport) | |
4273 | debug_printf("hosts_max_try_hardlimit reached: behave as if all " | |
4274 | "hosts were tried\n"); | |
4275 | } | |
4276 | else | |
8e669ac1 | 4277 | { |
533244af PH |
4278 | DEBUG(D_transport) |
4279 | debug_printf("hosts_max_try limit caused some hosts to be skipped\n"); | |
4280 | setflag(addr, af_retry_skipped); | |
8e669ac1 | 4281 | } |
0756eb3c PH |
4282 | |
4283 | if (queue_smtp) /* no deliveries attempted */ | |
4284 | { | |
4285 | addr->transport_return = DEFER; | |
4286 | addr->basic_errno = 0; | |
4287 | addr->message = US"SMTP delivery explicitly queued"; | |
4288 | } | |
4289 | ||
c3f2eb9a JH |
4290 | else if ( addr->transport_return == DEFER |
4291 | && (addr->basic_errno == ERRNO_UNKNOWNERROR || addr->basic_errno == 0) | |
4292 | && !addr->message | |
4293 | ) | |
0756eb3c PH |
4294 | { |
4295 | addr->basic_errno = ERRNO_HRETRY; | |
c3f2eb9a | 4296 | if (continue_hostname) |
0756eb3c | 4297 | addr->message = US"no host found for existing SMTP connection"; |
0756eb3c PH |
4298 | else if (expired) |
4299 | { | |
fffffe4c | 4300 | setflag(addr, af_pass_message); /* This is not a security risk */ |
c3f2eb9a JH |
4301 | addr->message = string_sprintf( |
4302 | "all hosts%s have been failing for a long time %s", | |
4303 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US"", | |
4304 | ob->delay_after_cutoff | |
4305 | ? US"(and retry time not reached)" | |
4306 | : US"and were last tried after this message arrived"); | |
0756eb3c PH |
4307 | |
4308 | /* If we are already using fallback hosts, or there are no fallback hosts | |
4309 | defined, convert the result to FAIL to cause a bounce. */ | |
4310 | ||
c3f2eb9a | 4311 | if (addr->host_list == addr->fallback_hosts || !addr->fallback_hosts) |
0756eb3c PH |
4312 | addr->transport_return = FAIL; |
4313 | } | |
4314 | else | |
4315 | { | |
93a680e4 | 4316 | const char * s; |
0756eb3c | 4317 | if (hosts_retry == hosts_total) |
93a680e4 | 4318 | s = "retry time not reached for any host%s"; |
0756eb3c | 4319 | else if (hosts_fail == hosts_total) |
93a680e4 | 4320 | s = "all host address lookups%s failed permanently"; |
0756eb3c | 4321 | else if (hosts_defer == hosts_total) |
93a680e4 | 4322 | s = "all host address lookups%s failed temporarily"; |
0756eb3c | 4323 | else if (hosts_serial == hosts_total) |
93a680e4 | 4324 | s = "connection limit reached for all hosts%s"; |
0756eb3c | 4325 | else if (hosts_fail+hosts_defer == hosts_total) |
93a680e4 | 4326 | s = "all host address lookups%s failed"; |
3cf01803 | 4327 | else |
93a680e4 | 4328 | s = "some host address lookups failed and retry time " |
3cf01803 JH |
4329 | "not reached for other hosts or connection limit reached%s"; |
4330 | ||
4331 | addr->message = string_sprintf(s, | |
4332 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US""); | |
0756eb3c PH |
4333 | } |
4334 | } | |
4335 | } | |
4336 | ||
4337 | /* Update the database which keeps information about which messages are waiting | |
f6c332bd PH |
4338 | for which hosts to become available. For some message-specific errors, the |
4339 | update_waiting flag is turned off because we don't want follow-on deliveries in | |
ea722490 | 4340 | those cases. If this transport instance is explicitly limited to one message |
8b260705 PP |
4341 | per connection then follow-on deliveries are not possible and there's no need |
4342 | to create/update the per-transport wait-<transport_name> database. */ | |
0756eb3c | 4343 | |
ea722490 JH |
4344 | if (update_waiting && tblock->connection_max_messages != 1) |
4345 | transport_update_waiting(hostlist, tblock->name); | |
0756eb3c PH |
4346 | |
4347 | END_TRANSPORT: | |
4348 | ||
4349 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4350 | ||
4351 | return TRUE; /* Each address has its status */ | |
4352 | } | |
4353 | ||
578897ea JH |
4354 | /* vi: aw ai sw=2 |
4355 | */ | |
0756eb3c | 4356 | /* End of transport/smtp.c */ |