Commit | Line | Data |
---|---|---|
0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
80fea873 | 5 | /* Copyright (c) University of Cambridge 1995 - 2016 */ |
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 PH |
585 | } |
586 | else *message = US string_sprintf("%s [%s]", host->name, host->address); | |
587 | ||
588 | return FALSE; | |
589 | } | |
590 | ||
591 | ||
592 | ||
593 | /************************************************* | |
594 | * Write error message to logs * | |
595 | *************************************************/ | |
596 | ||
597 | /* This writes to the main log and to the message log. | |
598 | ||
599 | Arguments: | |
600 | addr the address item containing error information | |
601 | host the current host | |
602 | ||
603 | Returns: nothing | |
604 | */ | |
605 | ||
606 | static void | |
607 | write_logs(address_item *addr, host_item *host) | |
608 | { | |
584ddd64 JH |
609 | uschar * message = LOGGING(outgoing_port) |
610 | ? string_sprintf("H=%s [%s]:%d", host->name, host->address, | |
611 | host->port == PORT_NONE ? 25 : host->port) | |
612 | : string_sprintf("H=%s [%s]", host->name, host->address); | |
c562fd30 JH |
613 | |
614 | if (addr->message) | |
0756eb3c | 615 | { |
c562fd30 | 616 | message = string_sprintf("%s: %s", message, addr->message); |
0756eb3c PH |
617 | if (addr->basic_errno > 0) |
618 | message = string_sprintf("%s: %s", message, strerror(addr->basic_errno)); | |
619 | log_write(0, LOG_MAIN, "%s", message); | |
620 | deliver_msglog("%s %s\n", tod_stamp(tod_log), message); | |
621 | } | |
622 | else | |
623 | { | |
37f3dc43 JH |
624 | const uschar * s = exim_errstr(addr->basic_errno); |
625 | log_write(0, LOG_MAIN, "%s %s", message, s); | |
626 | deliver_msglog("%s %s %s\n", tod_stamp(tod_log), message, s); | |
0756eb3c PH |
627 | } |
628 | } | |
629 | ||
c562fd30 JH |
630 | static void |
631 | msglog_line(host_item * host, uschar * message) | |
632 | { | |
37f3dc43 JH |
633 | deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log), |
634 | host->name, host->address, message); | |
c562fd30 JH |
635 | } |
636 | ||
0756eb3c PH |
637 | |
638 | ||
0cbf2b82 | 639 | #ifndef DISABLE_EVENT |
d68218c7 JH |
640 | /************************************************* |
641 | * Post-defer action * | |
642 | *************************************************/ | |
643 | ||
644 | /* This expands an arbitrary per-transport string. | |
645 | It might, for example, be used to write to the database log. | |
646 | ||
647 | Arguments: | |
d68218c7 JH |
648 | addr the address item containing error information |
649 | host the current host | |
650 | ||
651 | Returns: nothing | |
652 | */ | |
653 | ||
654 | static void | |
774ef2d7 | 655 | deferred_event_raise(address_item *addr, host_item *host) |
d68218c7 | 656 | { |
774ef2d7 | 657 | uschar * action = addr->transport->event_action; |
55414b25 | 658 | const uschar * save_domain; |
a7538db1 JH |
659 | uschar * save_local; |
660 | ||
d68218c7 | 661 | if (!action) |
a7538db1 | 662 | return; |
d68218c7 | 663 | |
a7538db1 JH |
664 | save_domain = deliver_domain; |
665 | save_local = deliver_localpart; | |
666 | ||
667 | /*XXX would ip & port already be set up? */ | |
668 | deliver_host_address = string_copy(host->address); | |
774ef2d7 JH |
669 | deliver_host_port = host->port == PORT_NONE ? 25 : host->port; |
670 | event_defer_errno = addr->basic_errno; | |
d68218c7 JH |
671 | |
672 | router_name = addr->router->name; | |
673 | transport_name = addr->transport->name; | |
a7538db1 JH |
674 | deliver_domain = addr->domain; |
675 | deliver_localpart = addr->local_part; | |
676 | ||
774ef2d7 | 677 | (void) event_raise(action, US"msg:host:defer", |
a7538db1 JH |
678 | addr->message |
679 | ? addr->basic_errno > 0 | |
680 | ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno)) | |
681 | : string_copy(addr->message) | |
682 | : addr->basic_errno > 0 | |
683 | ? string_copy(US strerror(addr->basic_errno)) | |
684 | : NULL); | |
685 | ||
686 | deliver_localpart = save_local; | |
687 | deliver_domain = save_domain; | |
d68218c7 JH |
688 | router_name = transport_name = NULL; |
689 | } | |
690 | #endif | |
691 | ||
0756eb3c PH |
692 | /************************************************* |
693 | * Synchronize SMTP responses * | |
694 | *************************************************/ | |
695 | ||
696 | /* This function is called from smtp_deliver() to receive SMTP responses from | |
697 | the server, and match them up with the commands to which they relate. When | |
698 | PIPELINING is not in use, this function is called after every command, and is | |
699 | therefore somewhat over-engineered, but it is simpler to use a single scheme | |
700 | that works both with and without PIPELINING instead of having two separate sets | |
701 | of code. | |
702 | ||
703 | The set of commands that are buffered up with pipelining may start with MAIL | |
704 | and may end with DATA; in between are RCPT commands that correspond to the | |
705 | addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH, | |
706 | etc.) are never buffered. | |
707 | ||
708 | Errors after MAIL or DATA abort the whole process leaving the response in the | |
709 | buffer. After MAIL, pending responses are flushed, and the original command is | |
710 | re-instated in big_buffer for error messages. For RCPT commands, the remote is | |
711 | permitted to reject some recipient addresses while accepting others. However | |
712 | certain errors clearly abort the whole process. Set the value in | |
713 | transport_return to PENDING_OK if the address is accepted. If there is a | |
714 | subsequent general error, it will get reset accordingly. If not, it will get | |
715 | converted to OK at the end. | |
716 | ||
717 | Arguments: | |
df5b41e3 | 718 | sx smtp connection context |
48c7f9e2 | 719 | count the number of responses to read |
48c7f9e2 PH |
720 | pending_DATA 0 if last command sent was not DATA |
721 | +1 if previously had a good recipient | |
722 | -1 if not previously had a good recipient | |
0756eb3c PH |
723 | |
724 | Returns: 3 if at least one address had 2xx and one had 5xx | |
725 | 2 if at least one address had 5xx but none had 2xx | |
726 | 1 if at least one host had a 2xx response, but none had 5xx | |
727 | 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA) | |
728 | -1 timeout while reading RCPT response | |
729 | -2 I/O or other non-response error for RCPT | |
730 | -3 DATA or MAIL failed - errno and buffer set | |
731 | */ | |
732 | ||
733 | static int | |
df5b41e3 | 734 | sync_responses(smtp_context * sx, int count, int pending_DATA) |
0756eb3c | 735 | { |
df5b41e3 | 736 | address_item *addr = sx->sync_addr; |
e9166683 JH |
737 | smtp_transport_options_block *ob = |
738 | (smtp_transport_options_block *)sx->tblock->options_block; | |
0756eb3c PH |
739 | int yield = 0; |
740 | ||
741 | /* Handle the response for a MAIL command. On error, reinstate the original | |
742 | command in big_buffer for error message use, and flush any further pending | |
743 | responses before returning, except after I/O errors and timeouts. */ | |
744 | ||
df5b41e3 | 745 | if (sx->pending_MAIL) |
0756eb3c PH |
746 | { |
747 | count--; | |
e9166683 JH |
748 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
749 | '2', ob->command_timeout)) | |
0756eb3c | 750 | { |
e027f545 | 751 | DEBUG(D_transport) debug_printf("bad response for MAIL\n"); |
0756eb3c | 752 | Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */ |
df5b41e3 | 753 | if (errno == 0 && sx->buffer[0] != 0) |
0756eb3c PH |
754 | { |
755 | uschar flushbuffer[4096]; | |
e97957bc | 756 | int save_errno = 0; |
df5b41e3 | 757 | if (sx->buffer[0] == '4') |
e97957bc PH |
758 | { |
759 | save_errno = ERRNO_MAIL4XX; | |
df5b41e3 | 760 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc | 761 | } |
0756eb3c PH |
762 | while (count-- > 0) |
763 | { | |
df5b41e3 | 764 | if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer), |
e9166683 | 765 | '2', ob->command_timeout) |
0756eb3c PH |
766 | && (errno != 0 || flushbuffer[0] == 0)) |
767 | break; | |
768 | } | |
e97957bc | 769 | errno = save_errno; |
0756eb3c | 770 | } |
c562fd30 JH |
771 | |
772 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
773 | while (count-- > 0) /* Mark any pending addrs with the host used */ | |
774 | { | |
775 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
df5b41e3 | 776 | addr->host_used = sx->host; |
c562fd30 JH |
777 | addr = addr->next; |
778 | } | |
0756eb3c PH |
779 | return -3; |
780 | } | |
781 | } | |
782 | ||
783 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
784 | ||
785 | /* Read and handle the required number of RCPT responses, matching each one up | |
786 | with an address by scanning for the next address whose status is PENDING_DEFER. | |
787 | */ | |
788 | ||
789 | while (count-- > 0) | |
790 | { | |
791 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
792 | ||
793 | /* The address was accepted */ | |
df5b41e3 | 794 | addr->host_used = sx->host; |
0756eb3c | 795 | |
e9166683 JH |
796 | if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
797 | '2', ob->command_timeout)) | |
0756eb3c PH |
798 | { |
799 | yield |= 1; | |
800 | addr->transport_return = PENDING_OK; | |
801 | ||
802 | /* If af_dr_retry_exists is set, there was a routing delay on this address; | |
09945f1e PH |
803 | ensure that any address-specific retry record is expunged. We do this both |
804 | for the basic key and for the version that also includes the sender. */ | |
0756eb3c PH |
805 | |
806 | if (testflag(addr, af_dr_retry_exists)) | |
09945f1e PH |
807 | { |
808 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, | |
809 | sender_address); | |
810 | retry_add_item(addr, altkey, rf_delete); | |
0756eb3c | 811 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
09945f1e | 812 | } |
0756eb3c PH |
813 | } |
814 | ||
815 | /* Timeout while reading the response */ | |
816 | ||
817 | else if (errno == ETIMEDOUT) | |
818 | { | |
c562fd30 | 819 | uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>", |
e9166683 | 820 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
df5b41e3 | 821 | set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE); |
0756eb3c | 822 | retry_add_item(addr, addr->address_retry_key, 0); |
f6c332bd | 823 | update_waiting = FALSE; |
0756eb3c PH |
824 | return -1; |
825 | } | |
826 | ||
827 | /* Handle other errors in obtaining an SMTP response by returning -1. This | |
828 | will cause all the addresses to be deferred. Restore the SMTP command in | |
829 | big_buffer for which we are checking the response, so the error message | |
830 | makes sense. */ | |
831 | ||
df5b41e3 | 832 | else if (errno != 0 || sx->buffer[0] == 0) |
0756eb3c PH |
833 | { |
834 | string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>", | |
df5b41e3 | 835 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
0756eb3c PH |
836 | return -2; |
837 | } | |
838 | ||
839 | /* Handle SMTP permanent and temporary response codes. */ | |
840 | ||
841 | else | |
842 | { | |
843 | addr->message = | |
447d236c | 844 | string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: " |
df5b41e3 JH |
845 | "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes), |
846 | string_printing(sx->buffer)); | |
447d236c | 847 | setflag(addr, af_pass_message); |
e9166683 JH |
848 | if (!sx->verify) |
849 | msglog_line(sx->host, addr->message); | |
0756eb3c PH |
850 | |
851 | /* The response was 5xx */ | |
852 | ||
df5b41e3 | 853 | if (sx->buffer[0] == '5') |
0756eb3c PH |
854 | { |
855 | addr->transport_return = FAIL; | |
856 | yield |= 2; | |
857 | } | |
858 | ||
859 | /* The response was 4xx */ | |
860 | ||
861 | else | |
862 | { | |
0756eb3c PH |
863 | addr->transport_return = DEFER; |
864 | addr->basic_errno = ERRNO_RCPT4XX; | |
df5b41e3 | 865 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
0756eb3c | 866 | |
e9166683 JH |
867 | if (!sx->verify) |
868 | { | |
0cbf2b82 | 869 | #ifndef DISABLE_EVENT |
e9166683 JH |
870 | event_defer_errno = addr->more_errno; |
871 | msg_event_raise(US"msg:rcpt:host:defer", addr); | |
5ef5dd52 JB |
872 | #endif |
873 | ||
e9166683 JH |
874 | /* Log temporary errors if there are more hosts to be tried. |
875 | If not, log this last one in the == line. */ | |
0756eb3c | 876 | |
e9166683 JH |
877 | if (sx->host->next) |
878 | log_write(0, LOG_MAIN, "H=%s [%s]: %s", | |
879 | sx->host->name, sx->host->address, addr->message); | |
0756eb3c | 880 | |
0cbf2b82 | 881 | #ifndef DISABLE_EVENT |
e9166683 JH |
882 | else |
883 | msg_event_raise(US"msg:rcpt:defer", addr); | |
5ef5dd52 JB |
884 | #endif |
885 | ||
e9166683 JH |
886 | /* Do not put this message on the list of those waiting for specific |
887 | hosts, as otherwise it is likely to be tried too often. */ | |
0756eb3c | 888 | |
e9166683 | 889 | update_waiting = FALSE; |
0756eb3c | 890 | |
e9166683 JH |
891 | /* Add a retry item for the address so that it doesn't get tried again |
892 | too soon. If address_retry_include_sender is true, add the sender address | |
893 | to the retry key. */ | |
0756eb3c | 894 | |
e9166683 JH |
895 | retry_add_item(addr, |
896 | ob->address_retry_include_sender | |
897 | ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address) | |
898 | : addr->address_retry_key, | |
899 | 0); | |
900 | } | |
0756eb3c PH |
901 | } |
902 | } | |
903 | } /* Loop for next RCPT response */ | |
904 | ||
905 | /* Update where to start at for the next block of responses, unless we | |
906 | have already handled all the addresses. */ | |
907 | ||
e9166683 | 908 | if (addr) sx->sync_addr = addr->next; |
0756eb3c PH |
909 | |
910 | /* Handle a response to DATA. If we have not had any good recipients, either | |
911 | previously or in this block, the response is ignored. */ | |
912 | ||
913 | if (pending_DATA != 0 && | |
e9166683 JH |
914 | !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
915 | '3', ob->command_timeout)) | |
0756eb3c PH |
916 | { |
917 | int code; | |
918 | uschar *msg; | |
447d236c | 919 | BOOL pass_message; |
e97957bc PH |
920 | if (pending_DATA > 0 || (yield & 1) != 0) |
921 | { | |
df5b41e3 | 922 | if (errno == 0 && sx->buffer[0] == '4') |
e97957bc PH |
923 | { |
924 | errno = ERRNO_DATA4XX; | |
df5b41e3 | 925 | sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc PH |
926 | } |
927 | return -3; | |
928 | } | |
df5b41e3 | 929 | (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message); |
0756eb3c PH |
930 | DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining " |
931 | "is in use and there were no good recipients\n", msg); | |
932 | } | |
933 | ||
934 | /* All responses read and handled; MAIL (if present) received 2xx and DATA (if | |
935 | present) received 3xx. If any RCPTs were handled and yielded anything other | |
936 | than 4xx, yield will be set non-zero. */ | |
937 | ||
938 | return yield; | |
939 | } | |
940 | ||
941 | ||
942 | ||
fcc8e047 JH |
943 | /* Do the client side of smtp-level authentication */ |
944 | /* | |
945 | Arguments: | |
946 | buffer EHLO response from server (gets overwritten) | |
947 | addrlist chain of potential addresses to deliver | |
948 | host host to deliver to | |
949 | ob transport options | |
950 | ibp, obp comms channel control blocks | |
951 | ||
952 | Returns: | |
953 | OK Success, or failed (but not required): global "smtp_authenticated" set | |
954 | DEFER Failed authentication (and was required) | |
955 | ERROR Internal problem | |
956 | ||
957 | FAIL_SEND Failed communications - transmit | |
958 | FAIL - response | |
959 | */ | |
960 | ||
961 | int | |
962 | smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host, | |
963 | smtp_transport_options_block *ob, BOOL is_esmtp, | |
964 | smtp_inblock *ibp, smtp_outblock *obp) | |
965 | { | |
a7538db1 JH |
966 | int require_auth; |
967 | uschar *fail_reason = US"server did not advertise AUTH support"; | |
fcc8e047 | 968 | |
a7538db1 JH |
969 | smtp_authenticated = FALSE; |
970 | client_authenticator = client_authenticated_id = client_authenticated_sender = NULL; | |
5130845b | 971 | require_auth = verify_check_given_host(&ob->hosts_require_auth, host); |
fcc8e047 | 972 | |
a7538db1 JH |
973 | if (is_esmtp && !regex_AUTH) regex_AUTH = |
974 | regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)", | |
975 | FALSE, TRUE); | |
fcc8e047 | 976 | |
a7538db1 JH |
977 | if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1)) |
978 | { | |
979 | uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
980 | expand_nmax = -1; /* reset */ | |
fcc8e047 | 981 | |
a7538db1 JH |
982 | /* Must not do this check until after we have saved the result of the |
983 | regex match above. */ | |
fcc8e047 | 984 | |
a7538db1 | 985 | if (require_auth == OK || |
5130845b | 986 | verify_check_given_host(&ob->hosts_try_auth, host) == OK) |
a7538db1 JH |
987 | { |
988 | auth_instance *au; | |
989 | fail_reason = US"no common mechanisms were found"; | |
fcc8e047 | 990 | |
a7538db1 | 991 | DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n"); |
fcc8e047 | 992 | |
a7538db1 JH |
993 | /* Scan the configured authenticators looking for one which is configured |
994 | for use as a client, which is not suppressed by client_condition, and | |
995 | whose name matches an authentication mechanism supported by the server. | |
996 | If one is found, attempt to authenticate by calling its client function. | |
997 | */ | |
fcc8e047 | 998 | |
a7538db1 JH |
999 | for (au = auths; !smtp_authenticated && au != NULL; au = au->next) |
1000 | { | |
1001 | uschar *p = names; | |
1002 | if (!au->client || | |
1003 | (au->client_condition != NULL && | |
1004 | !expand_check_condition(au->client_condition, au->name, | |
1005 | US"client authenticator"))) | |
1006 | { | |
1007 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1008 | au->name, | |
1009 | (au->client)? "client_condition is false" : | |
1010 | "not configured as a client"); | |
1011 | continue; | |
1012 | } | |
fcc8e047 | 1013 | |
a7538db1 | 1014 | /* Loop to scan supported server mechanisms */ |
fcc8e047 | 1015 | |
a7538db1 JH |
1016 | while (*p != 0) |
1017 | { | |
1018 | int rc; | |
1019 | int len = Ustrlen(au->public_name); | |
1020 | while (isspace(*p)) p++; | |
fcc8e047 | 1021 | |
a7538db1 JH |
1022 | if (strncmpic(au->public_name, p, len) != 0 || |
1023 | (p[len] != 0 && !isspace(p[len]))) | |
1024 | { | |
1025 | while (*p != 0 && !isspace(*p)) p++; | |
1026 | continue; | |
1027 | } | |
fcc8e047 | 1028 | |
a7538db1 JH |
1029 | /* Found data for a listed mechanism. Call its client entry. Set |
1030 | a flag in the outblock so that data is overwritten after sending so | |
1031 | that reflections don't show it. */ | |
fcc8e047 | 1032 | |
a7538db1 JH |
1033 | fail_reason = US"authentication attempt(s) failed"; |
1034 | obp->authenticating = TRUE; | |
1035 | rc = (au->info->clientcode)(au, ibp, obp, | |
1036 | ob->command_timeout, buffer, bufsize); | |
1037 | obp->authenticating = FALSE; | |
1038 | DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n", | |
1039 | au->name, rc); | |
fcc8e047 | 1040 | |
a7538db1 JH |
1041 | /* A temporary authentication failure must hold up delivery to |
1042 | this host. After a permanent authentication failure, we carry on | |
1043 | to try other authentication methods. If all fail hard, try to | |
1044 | deliver the message unauthenticated unless require_auth was set. */ | |
fcc8e047 | 1045 | |
a7538db1 JH |
1046 | switch(rc) |
1047 | { | |
1048 | case OK: | |
1049 | smtp_authenticated = TRUE; /* stops the outer loop */ | |
1050 | client_authenticator = au->name; | |
1051 | if (au->set_client_id != NULL) | |
1052 | client_authenticated_id = expand_string(au->set_client_id); | |
1053 | break; | |
1054 | ||
1055 | /* Failure after writing a command */ | |
1056 | ||
1057 | case FAIL_SEND: | |
1058 | return FAIL_SEND; | |
1059 | ||
1060 | /* Failure after reading a response */ | |
1061 | ||
1062 | case FAIL: | |
1063 | if (errno != 0 || buffer[0] != '5') return FAIL; | |
1064 | log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s", | |
1065 | au->name, host->name, host->address, buffer); | |
1066 | break; | |
1067 | ||
1068 | /* Failure by some other means. In effect, the authenticator | |
1069 | decided it wasn't prepared to handle this case. Typically this | |
1070 | is the result of "fail" in an expansion string. Do we need to | |
1071 | log anything here? Feb 2006: a message is now put in the buffer | |
1072 | if logging is required. */ | |
1073 | ||
1074 | case CANCELLED: | |
1075 | if (*buffer != 0) | |
1076 | log_write(0, LOG_MAIN, "%s authenticator cancelled " | |
1077 | "authentication H=%s [%s] %s", au->name, host->name, | |
1078 | host->address, buffer); | |
1079 | break; | |
1080 | ||
1081 | /* Internal problem, message in buffer. */ | |
1082 | ||
1083 | case ERROR: | |
895fbaf2 JH |
1084 | set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer), |
1085 | DEFER, FALSE); | |
a7538db1 JH |
1086 | return ERROR; |
1087 | } | |
fcc8e047 | 1088 | |
a7538db1 JH |
1089 | break; /* If not authenticated, try next authenticator */ |
1090 | } /* Loop for scanning supported server mechanisms */ | |
1091 | } /* Loop for further authenticators */ | |
fcc8e047 | 1092 | } |
a7538db1 | 1093 | } |
fcc8e047 | 1094 | |
a7538db1 | 1095 | /* If we haven't authenticated, but are required to, give up. */ |
fcc8e047 | 1096 | |
a7538db1 JH |
1097 | if (require_auth == OK && !smtp_authenticated) |
1098 | { | |
895fbaf2 | 1099 | set_errno_nohost(addrlist, ERRNO_AUTHFAIL, |
a7538db1 | 1100 | string_sprintf("authentication required but %s", fail_reason), DEFER, |
895fbaf2 | 1101 | FALSE); |
a7538db1 JH |
1102 | return DEFER; |
1103 | } | |
4d8d62b9 | 1104 | |
a7538db1 | 1105 | return OK; |
fcc8e047 JH |
1106 | } |
1107 | ||
1108 | ||
1109 | /* Construct AUTH appendix string for MAIL TO */ | |
1110 | /* | |
1111 | Arguments | |
1112 | buffer to build string | |
1113 | addrlist chain of potential addresses to deliver | |
1114 | ob transport options | |
1115 | ||
1116 | Globals smtp_authenticated | |
1117 | client_authenticated_sender | |
1118 | Return True on error, otherwise buffer has (possibly empty) terminated string | |
1119 | */ | |
1120 | ||
1121 | BOOL | |
1122 | smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist, | |
1123 | smtp_transport_options_block *ob) | |
1124 | { | |
1125 | uschar *local_authenticated_sender = authenticated_sender; | |
1126 | ||
1127 | #ifdef notdef | |
1128 | debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N"); | |
1129 | #endif | |
1130 | ||
1131 | if (ob->authenticated_sender != NULL) | |
1132 | { | |
1133 | uschar *new = expand_string(ob->authenticated_sender); | |
1134 | if (new == NULL) | |
1135 | { | |
1136 | if (!expand_string_forcedfail) | |
1137 | { | |
1138 | uschar *message = string_sprintf("failed to expand " | |
1139 | "authenticated_sender: %s", expand_string_message); | |
895fbaf2 | 1140 | set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
fcc8e047 JH |
1141 | return TRUE; |
1142 | } | |
1143 | } | |
1144 | else if (new[0] != 0) local_authenticated_sender = new; | |
1145 | } | |
1146 | ||
1147 | /* Add the authenticated sender address if present */ | |
1148 | ||
1149 | if ((smtp_authenticated || ob->authenticated_sender_force) && | |
1150 | local_authenticated_sender != NULL) | |
1151 | { | |
1152 | string_format(buffer, bufsize, " AUTH=%s", | |
1153 | auth_xtextencode(local_authenticated_sender, | |
1154 | Ustrlen(local_authenticated_sender))); | |
1155 | client_authenticated_sender = string_copy(local_authenticated_sender); | |
1156 | } | |
1157 | else | |
1158 | *buffer= 0; | |
1159 | ||
1160 | return FALSE; | |
1161 | } | |
1162 | ||
1163 | ||
1164 | ||
0e66b3b6 | 1165 | #ifdef EXPERIMENTAL_DANE |
2d5fdd53 JH |
1166 | /* Lookup TLSA record for host/port. |
1167 | Return: OK success with dnssec; DANE mode | |
1168 | DEFER Do not use this host now, may retry later | |
1169 | FAIL_FORCED No TLSA record; DANE not usable | |
1170 | FAIL Do not use this connection | |
1171 | */ | |
1172 | ||
0e66b3b6 | 1173 | int |
4b0fe319 | 1174 | tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required) |
0e66b3b6 JH |
1175 | { |
1176 | /* move this out to host.c given the similarity to dns_lookup() ? */ | |
1177 | uschar buffer[300]; | |
55414b25 | 1178 | const uschar * fullname = buffer; |
0e66b3b6 JH |
1179 | |
1180 | /* TLSA lookup string */ | |
1181 | (void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name); | |
1182 | ||
1183 | switch (dns_lookup(dnsa, buffer, T_TLSA, &fullname)) | |
1184 | { | |
0e66b3b6 JH |
1185 | case DNS_SUCCEED: |
1186 | if (!dns_is_secure(dnsa)) | |
1187 | { | |
1188 | log_write(0, LOG_MAIN, "DANE error: TLSA lookup not DNSSEC"); | |
1189 | return DEFER; | |
1190 | } | |
4b0fe319 | 1191 | return OK; |
2d5fdd53 JH |
1192 | |
1193 | case DNS_AGAIN: | |
1194 | return DEFER; /* just defer this TLS'd conn */ | |
1195 | ||
ef3a1a30 JH |
1196 | case DNS_NODATA: /* no TLSA RR for this lookup */ |
1197 | case DNS_NOMATCH: /* no records at all for this lookup */ | |
2d5fdd53 JH |
1198 | return dane_required ? FAIL : FAIL_FORCED; |
1199 | ||
1200 | default: | |
1201 | case DNS_FAIL: | |
1202 | return dane_required ? FAIL : DEFER; | |
0e66b3b6 | 1203 | } |
0e66b3b6 JH |
1204 | } |
1205 | #endif | |
1206 | ||
1207 | ||
a39bd74d JB |
1208 | |
1209 | typedef struct smtp_compare_s | |
1210 | { | |
1211 | uschar *current_sender_address; | |
1212 | struct transport_instance *tblock; | |
1213 | } smtp_compare_t; | |
1214 | ||
d093f8e5 JH |
1215 | |
1216 | /* Create a unique string that identifies this message, it is based on | |
1217 | sender_address, helo_data and tls_certificate if enabled. | |
1218 | */ | |
a39bd74d JB |
1219 | |
1220 | static uschar * | |
1221 | smtp_local_identity(uschar * sender, struct transport_instance * tblock) | |
1222 | { | |
1223 | address_item * addr1; | |
1224 | uschar * if1 = US""; | |
1225 | uschar * helo1 = US""; | |
1226 | #ifdef SUPPORT_TLS | |
1227 | uschar * tlsc1 = US""; | |
1228 | #endif | |
1229 | uschar * save_sender_address = sender_address; | |
1230 | uschar * local_identity = NULL; | |
1231 | smtp_transport_options_block * ob = | |
1232 | (smtp_transport_options_block *)tblock->options_block; | |
1233 | ||
1234 | sender_address = sender; | |
1235 | ||
1236 | addr1 = deliver_make_addr (sender, TRUE); | |
1237 | deliver_set_expansions(addr1); | |
1238 | ||
1239 | if (ob->interface) | |
1240 | if1 = expand_string(ob->interface); | |
1241 | ||
1242 | if (ob->helo_data) | |
1243 | helo1 = expand_string(ob->helo_data); | |
1244 | ||
1245 | #ifdef SUPPORT_TLS | |
1246 | if (ob->tls_certificate) | |
1247 | tlsc1 = expand_string(ob->tls_certificate); | |
1248 | local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1); | |
1249 | #else | |
1250 | local_identity = string_sprintf ("%s^%s", if1, helo1); | |
1251 | #endif | |
1252 | ||
1253 | deliver_set_expansions(NULL); | |
1254 | sender_address = save_sender_address; | |
1255 | ||
1256 | return local_identity; | |
1257 | } | |
1258 | ||
1259 | ||
1260 | ||
1261 | /* This routine is a callback that is called from transport_check_waiting. | |
1262 | This function will evaluate the incoming message versus the previous | |
1263 | message. If the incoming message is using a different local identity then | |
1264 | we will veto this new message. */ | |
1265 | ||
1266 | static BOOL | |
1267 | smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare) | |
1268 | { | |
dadff1d4 HSHR |
1269 | uschar * message_local_identity, |
1270 | * current_local_identity, | |
1271 | * new_sender_address; | |
1272 | ||
1273 | current_local_identity = | |
a39bd74d | 1274 | smtp_local_identity(s_compare->current_sender_address, s_compare->tblock); |
a39bd74d | 1275 | |
dadff1d4 HSHR |
1276 | if (!(new_sender_address = deliver_get_sender_address(message_id))) |
1277 | return 0; | |
1278 | ||
1279 | message_local_identity = | |
1280 | smtp_local_identity(new_sender_address, s_compare->tblock); | |
a39bd74d JB |
1281 | |
1282 | return Ustrcmp(current_local_identity, message_local_identity) == 0; | |
1283 | } | |
1284 | ||
1285 | ||
1286 | ||
e9166683 JH |
1287 | static uschar |
1288 | ehlo_response(uschar * buf, uschar checks) | |
9094b84b | 1289 | { |
e9166683 JH |
1290 | size_t bsize = Ustrlen(buf); |
1291 | ||
9094b84b | 1292 | #ifdef SUPPORT_TLS |
ff5aac2b JH |
1293 | if ( checks & PEER_OFFERED_TLS |
1294 | && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1295 | checks &= ~PEER_OFFERED_TLS; | |
9094b84b JH |
1296 | #endif |
1297 | ||
ff5aac2b JH |
1298 | if ( checks & PEER_OFFERED_IGNQ |
1299 | && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0, | |
1300 | PCRE_EOPT, NULL, 0) < 0) | |
1301 | checks &= ~PEER_OFFERED_IGNQ; | |
9094b84b | 1302 | |
f98442df JH |
1303 | if ( checks & PEER_OFFERED_CHUNKING |
1304 | && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1305 | checks &= ~PEER_OFFERED_CHUNKING; | |
1306 | ||
9094b84b | 1307 | #ifndef DISABLE_PRDR |
ff5aac2b JH |
1308 | if ( checks & PEER_OFFERED_PRDR |
1309 | && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1310 | checks &= ~PEER_OFFERED_PRDR; | |
9094b84b JH |
1311 | #endif |
1312 | ||
1313 | #ifdef SUPPORT_I18N | |
ff5aac2b JH |
1314 | if ( checks & PEER_OFFERED_UTF8 |
1315 | && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1316 | checks &= ~PEER_OFFERED_UTF8; | |
9094b84b JH |
1317 | #endif |
1318 | ||
ff5aac2b JH |
1319 | if ( checks & PEER_OFFERED_DSN |
1320 | && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1321 | checks &= ~PEER_OFFERED_DSN; | |
9094b84b | 1322 | |
ff5aac2b JH |
1323 | if ( checks & PEER_OFFERED_PIPE |
1324 | && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0, | |
1325 | PCRE_EOPT, NULL, 0) < 0) | |
1326 | checks &= ~PEER_OFFERED_PIPE; | |
9094b84b | 1327 | |
ff5aac2b JH |
1328 | if ( checks & PEER_OFFERED_SIZE |
1329 | && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1330 | checks &= ~PEER_OFFERED_SIZE; | |
9094b84b JH |
1331 | |
1332 | return checks; | |
1333 | } | |
1334 | ||
1335 | ||
6d5c916c JH |
1336 | |
1337 | /* Callback for emitting a BDAT data chunk header. | |
6d5c916c | 1338 | |
e027f545 JH |
1339 | If given a nonzero size, first flush any buffered SMTP commands |
1340 | then emit the command. | |
1341 | ||
1342 | Reap previous SMTP command responses if requested. | |
1343 | Reap one SMTP command response if requested. | |
6d5c916c JH |
1344 | |
1345 | Returns: OK or ERROR | |
1346 | */ | |
1347 | ||
1348 | static int | |
1349 | smtp_chunk_cmd_callback(int fd, transport_ctx * tctx, | |
e027f545 | 1350 | unsigned chunk_size, unsigned flags) |
6d5c916c JH |
1351 | { |
1352 | smtp_transport_options_block * ob = | |
1353 | (smtp_transport_options_block *)(tctx->tblock->options_block); | |
e9166683 | 1354 | smtp_context * sx = tctx->smtp_context; |
e027f545 JH |
1355 | int cmd_count = 0; |
1356 | int prev_cmd_count; | |
6d5c916c | 1357 | |
e027f545 | 1358 | /* Write SMTP chunk header command */ |
6d5c916c | 1359 | |
e027f545 | 1360 | if (chunk_size > 0) |
87cb4a16 | 1361 | { |
e9166683 | 1362 | if((cmd_count = smtp_write_command(&sx->outblock, FALSE, "BDAT %u%s\r\n", |
e027f545 JH |
1363 | chunk_size, |
1364 | flags & tc_chunk_last ? " LAST" : "") | |
1365 | ) < 0) return ERROR; | |
87cb4a16 JH |
1366 | if (flags & tc_chunk_last) |
1367 | data_command = string_copy(big_buffer); /* Save for later error message */ | |
1368 | } | |
e027f545 | 1369 | |
e9166683 | 1370 | prev_cmd_count = cmd_count += sx->cmd_count; |
6d5c916c | 1371 | |
e027f545 | 1372 | /* Reap responses for any previous, but not one we just emitted */ |
6d5c916c | 1373 | |
e027f545 JH |
1374 | if (chunk_size > 0) |
1375 | prev_cmd_count--; | |
e9166683 | 1376 | if (sx->pending_BDAT) |
e027f545 | 1377 | prev_cmd_count--; |
6d5c916c | 1378 | |
e027f545 | 1379 | if (flags & tc_reap_prev && prev_cmd_count > 0) |
6d5c916c | 1380 | { |
58fc5fb2 JH |
1381 | DEBUG(D_transport) debug_printf("look for %d responses" |
1382 | " for previous pipelined cmds\n", prev_cmd_count); | |
6d5c916c | 1383 | |
e9166683 | 1384 | switch(sync_responses(sx, prev_cmd_count, 0)) |
e027f545 JH |
1385 | { |
1386 | case 1: /* 2xx (only) => OK */ | |
e9166683 JH |
1387 | case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */ |
1388 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e027f545 JH |
1389 | case 0: break; /* No 2xx or 5xx, but no probs */ |
1390 | ||
1391 | case -1: /* Timeout on RCPT */ | |
1392 | default: return ERROR; /* I/O error, or any MAIL/DATA error */ | |
1393 | } | |
1394 | cmd_count = 1; | |
e9166683 | 1395 | if (!sx->pending_BDAT) |
e027f545 | 1396 | pipelining_active = FALSE; |
6d5c916c | 1397 | } |
e027f545 | 1398 | |
58fc5fb2 | 1399 | /* Reap response for an outstanding BDAT */ |
e027f545 | 1400 | |
e9166683 | 1401 | if (sx->pending_BDAT) |
e027f545 | 1402 | { |
58fc5fb2 JH |
1403 | DEBUG(D_transport) debug_printf("look for one response for BDAT\n"); |
1404 | ||
e9166683 | 1405 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
e027f545 JH |
1406 | ob->command_timeout)) |
1407 | { | |
e9166683 | 1408 | if (errno == 0 && sx->buffer[0] == '4') |
e027f545 JH |
1409 | { |
1410 | errno = ERRNO_DATA4XX; /*XXX does this actually get used? */ | |
e9166683 JH |
1411 | sx->first_addr->more_errno |= |
1412 | ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
e027f545 JH |
1413 | } |
1414 | return ERROR; | |
1415 | } | |
1416 | cmd_count--; | |
e9166683 | 1417 | sx->pending_BDAT = FALSE; |
e027f545 JH |
1418 | pipelining_active = FALSE; |
1419 | } | |
1420 | else if (chunk_size > 0) | |
e9166683 | 1421 | sx->pending_BDAT = TRUE; |
e027f545 JH |
1422 | |
1423 | ||
e9166683 | 1424 | sx->cmd_count = cmd_count; |
e027f545 | 1425 | return OK; |
6d5c916c JH |
1426 | } |
1427 | ||
1428 | ||
1429 | ||
0756eb3c | 1430 | /************************************************* |
d093f8e5 | 1431 | * Make connection for given message * |
0756eb3c PH |
1432 | *************************************************/ |
1433 | ||
d093f8e5 JH |
1434 | /* |
1435 | Arguments: | |
1436 | ctx connection context | |
d093f8e5 JH |
1437 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for |
1438 | a second attempt after TLS initialization fails | |
d093f8e5 JH |
1439 | |
1440 | Returns: OK - the connection was made and the delivery attempted; | |
1441 | fd is set in the conn context, tls_out set up. | |
1442 | DEFER - the connection could not be made, or something failed | |
1443 | while setting up the SMTP session, or there was a | |
1444 | non-message-specific error, such as a timeout. | |
1445 | ERROR - helo_data or add_headers or authenticated_sender is | |
1446 | specified for this transport, and the string failed | |
1447 | to expand | |
1448 | */ | |
1449 | int | |
e9166683 | 1450 | smtp_setup_conn(smtp_context * sx, BOOL suppress_tls) |
d093f8e5 JH |
1451 | { |
1452 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) | |
1453 | dns_answer tlsa_dnsa; | |
1454 | #endif | |
1455 | BOOL pass_message = FALSE; | |
1456 | ||
1457 | uschar * message = NULL; | |
1458 | int save_errno; | |
1459 | int yield = OK; | |
1460 | int rc; | |
1461 | ||
02b41d71 | 1462 | sx->ob = (smtp_transport_options_block *) sx->tblock->options_block; |
d093f8e5 JH |
1463 | |
1464 | sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0; | |
1465 | sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0; | |
1466 | sx->ok = FALSE; | |
1467 | sx->send_rset = TRUE; | |
1468 | sx->send_quit = TRUE; | |
1469 | sx->setting_up = TRUE; | |
1470 | sx->esmtp = TRUE; | |
1471 | sx->esmtp_sent = FALSE; | |
59a286ef | 1472 | #ifdef SUPPORT_I18N |
d093f8e5 | 1473 | sx->utf8_needed = FALSE; |
59a286ef | 1474 | #endif |
d093f8e5 | 1475 | sx->dsn_all_lasthop = TRUE; |
59a286ef | 1476 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
d093f8e5 JH |
1477 | sx->dane = FALSE; |
1478 | sx->dane_required = verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK; | |
1479 | #endif | |
1480 | ||
1481 | if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999; | |
d093f8e5 JH |
1482 | sx->peer_offered = 0; |
1483 | sx->igquotstr = US""; | |
02b41d71 | 1484 | if (!sx->helo_data) sx->helo_data = sx->ob->helo_data; |
d093f8e5 JH |
1485 | #ifdef EXPERIMENTAL_DSN_INFO |
1486 | sx->smtp_greeting = NULL; | |
1487 | sx->helo_response = NULL; | |
59a286ef JH |
1488 | #endif |
1489 | ||
0756eb3c | 1490 | smtp_command = US"initial connection"; |
d093f8e5 | 1491 | sx->buffer[0] = '\0'; |
0756eb3c PH |
1492 | |
1493 | /* Set up the buffer for reading SMTP response packets. */ | |
1494 | ||
d093f8e5 JH |
1495 | sx->inblock.buffer = sx->inbuffer; |
1496 | sx->inblock.buffersize = sizeof(sx->inbuffer); | |
1497 | sx->inblock.ptr = sx->inbuffer; | |
1498 | sx->inblock.ptrend = sx->inbuffer; | |
0756eb3c PH |
1499 | |
1500 | /* Set up the buffer for holding SMTP commands while pipelining */ | |
1501 | ||
d093f8e5 JH |
1502 | sx->outblock.buffer = sx->outbuffer; |
1503 | sx->outblock.buffersize = sizeof(sx->outbuffer); | |
1504 | sx->outblock.ptr = sx->outbuffer; | |
1505 | sx->outblock.cmd_count = 0; | |
1506 | sx->outblock.authenticating = FALSE; | |
0756eb3c | 1507 | |
6c512171 PH |
1508 | /* Reset the parameters of a TLS session. */ |
1509 | ||
817d9f57 JH |
1510 | tls_out.bits = 0; |
1511 | tls_out.cipher = NULL; /* the one we may use for this transport */ | |
9d1c15ef JH |
1512 | tls_out.ourcert = NULL; |
1513 | tls_out.peercert = NULL; | |
817d9f57 JH |
1514 | tls_out.peerdn = NULL; |
1515 | #if defined(SUPPORT_TLS) && !defined(USE_GNUTLS) | |
1516 | tls_out.sni = NULL; | |
5b456975 | 1517 | #endif |
018058b2 | 1518 | tls_out.ocsp = OCSP_NOT_REQ; |
6c512171 | 1519 | |
35aba663 JH |
1520 | /* Flip the legacy TLS-related variables over to the outbound set in case |
1521 | they're used in the context of the transport. Don't bother resetting | |
02b41d71 JH |
1522 | afterward (when being used by a transport) as we're in a subprocess. |
1523 | For verify, unflipped once the callout is dealt with */ | |
35aba663 JH |
1524 | |
1525 | tls_modify_variables(&tls_out); | |
1526 | ||
061b7ebd | 1527 | #ifndef SUPPORT_TLS |
d093f8e5 | 1528 | if (sx->smtps) |
061b7ebd | 1529 | { |
d093f8e5 | 1530 | set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available", |
895fbaf2 | 1531 | DEFER, FALSE); |
018058b2 | 1532 | return ERROR; |
061b7ebd PP |
1533 | } |
1534 | #endif | |
1535 | ||
0756eb3c PH |
1536 | /* Make a connection to the host if this isn't a continued delivery, and handle |
1537 | the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled | |
1538 | specially so they can be identified for retries. */ | |
1539 | ||
1540 | if (continue_hostname == NULL) | |
1541 | { | |
e9166683 | 1542 | if (sx->verify) |
02b41d71 JH |
1543 | HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port); |
1544 | ||
a7538db1 | 1545 | /* This puts port into host->port */ |
d093f8e5 JH |
1546 | sx->inblock.sock = sx->outblock.sock = |
1547 | smtp_connect(sx->host, sx->host_af, sx->port, sx->interface, | |
1548 | sx->ob->connect_timeout, sx->tblock); | |
4311097e | 1549 | |
d093f8e5 | 1550 | if (sx->inblock.sock < 0) |
0756eb3c | 1551 | { |
02b41d71 JH |
1552 | uschar * msg = NULL; |
1553 | int save_errno = errno; | |
e9166683 | 1554 | if (sx->verify) |
02b41d71 JH |
1555 | { |
1556 | msg = strerror(errno); | |
1557 | HDEBUG(D_verify) debug_printf("connect: %s\n", msg); | |
1558 | } | |
1559 | set_errno_nohost(sx->addrlist, | |
1560 | save_errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : save_errno, | |
e9166683 | 1561 | sx->verify ? string_sprintf("could not connect: %s", msg) |
02b41d71 JH |
1562 | : NULL, |
1563 | DEFER, FALSE); | |
1564 | sx->send_quit = FALSE; | |
0756eb3c PH |
1565 | return DEFER; |
1566 | } | |
1567 | ||
0e66b3b6 JH |
1568 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
1569 | { | |
0e66b3b6 JH |
1570 | tls_out.dane_verified = FALSE; |
1571 | tls_out.tlsa_usage = 0; | |
1572 | ||
d093f8e5 | 1573 | if (sx->host->dnssec == DS_YES) |
0e66b3b6 | 1574 | { |
d093f8e5 JH |
1575 | if( sx->dane_required |
1576 | || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK | |
0e66b3b6 | 1577 | ) |
d093f8e5 | 1578 | switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required)) |
4b0fe319 | 1579 | { |
d093f8e5 | 1580 | case OK: sx->dane = TRUE; break; |
2d5fdd53 | 1581 | case FAIL_FORCED: break; |
d093f8e5 | 1582 | default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
2d5fdd53 JH |
1583 | string_sprintf("DANE error: tlsa lookup %s", |
1584 | rc == DEFER ? "DEFER" : "FAIL"), | |
1585 | rc, FALSE); | |
1586 | return rc; | |
4b0fe319 | 1587 | } |
0e66b3b6 | 1588 | } |
d093f8e5 | 1589 | else if (sx->dane_required) |
0e66b3b6 | 1590 | { |
d093f8e5 JH |
1591 | set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
1592 | string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name), | |
895fbaf2 | 1593 | FAIL, FALSE); |
4b0fe319 | 1594 | return FAIL; |
0e66b3b6 JH |
1595 | } |
1596 | ||
d093f8e5 JH |
1597 | if (sx->dane) |
1598 | sx->ob->tls_tempfail_tryclear = FALSE; | |
0e66b3b6 JH |
1599 | } |
1600 | #endif /*DANE*/ | |
1601 | ||
41c7c167 PH |
1602 | /* Expand the greeting message while waiting for the initial response. (Makes |
1603 | sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is | |
1604 | delayed till here so that $sending_interface and $sending_port are set. */ | |
1605 | ||
02b41d71 JH |
1606 | if (sx->helo_data) |
1607 | if (!(sx->helo_data = expand_string(sx->helo_data))) | |
e9166683 | 1608 | if (sx->verify) |
02b41d71 JH |
1609 | log_write(0, LOG_MAIN|LOG_PANIC, |
1610 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1611 | sx->addrlist->address, expand_string_message); | |
1612 | ||
8c5d388a | 1613 | #ifdef SUPPORT_I18N |
d093f8e5 | 1614 | if (sx->helo_data) |
810d16ad | 1615 | { |
02b41d71 JH |
1616 | expand_string_message = NULL; |
1617 | if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data, | |
1618 | &expand_string_message)), | |
1619 | expand_string_message) | |
e9166683 | 1620 | if (sx->verify) |
02b41d71 JH |
1621 | log_write(0, LOG_MAIN|LOG_PANIC, |
1622 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1623 | sx->addrlist->address, expand_string_message); | |
1624 | else | |
1625 | sx->helo_data = NULL; | |
810d16ad JH |
1626 | } |
1627 | #endif | |
41c7c167 | 1628 | |
0756eb3c PH |
1629 | /* The first thing is to wait for an initial OK response. The dreaded "goto" |
1630 | is nevertheless a reasonably clean way of programming this kind of logic, | |
1631 | where you want to escape on any error. */ | |
1632 | ||
d093f8e5 | 1633 | if (!sx->smtps) |
061b7ebd | 1634 | { |
8d330698 JH |
1635 | BOOL good_response; |
1636 | ||
1637 | #ifdef TCP_QUICKACK | |
d093f8e5 | 1638 | (void) setsockopt(sx->inblock.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off)); |
8d330698 | 1639 | #endif |
d093f8e5 JH |
1640 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1641 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1642 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1643 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
1644 | #endif |
1645 | if (!good_response) goto RESPONSE_FAILED; | |
0756eb3c | 1646 | |
0cbf2b82 | 1647 | #ifndef DISABLE_EVENT |
b30275b8 | 1648 | { |
805c9d53 | 1649 | uschar * s; |
d093f8e5 JH |
1650 | lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes" |
1651 | : sx->host->dnssec==DS_NO ? US"no" : NULL; | |
1652 | s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer); | |
b30275b8 | 1653 | if (s) |
a7538db1 | 1654 | { |
d093f8e5 | 1655 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, |
b30275b8 | 1656 | string_sprintf("deferred by smtp:connect event expansion: %s", s), |
895fbaf2 | 1657 | DEFER, FALSE); |
a7538db1 JH |
1658 | yield = DEFER; |
1659 | goto SEND_QUIT; | |
1660 | } | |
b30275b8 | 1661 | } |
a7538db1 JH |
1662 | #endif |
1663 | ||
061b7ebd PP |
1664 | /* Now check if the helo_data expansion went well, and sign off cleanly if |
1665 | it didn't. */ | |
41c7c167 | 1666 | |
d093f8e5 | 1667 | if (!sx->helo_data) |
061b7ebd | 1668 | { |
d093f8e5 | 1669 | message = string_sprintf("failed to expand helo_data: %s", |
061b7ebd | 1670 | expand_string_message); |
d093f8e5 | 1671 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
061b7ebd PP |
1672 | yield = DEFER; |
1673 | goto SEND_QUIT; | |
1674 | } | |
41c7c167 PH |
1675 | } |
1676 | ||
0756eb3c | 1677 | /** Debugging without sending a message |
d093f8e5 | 1678 | sx->addrlist->transport_return = DEFER; |
0756eb3c PH |
1679 | goto SEND_QUIT; |
1680 | **/ | |
1681 | ||
1682 | /* Errors that occur after this point follow an SMTP command, which is | |
1683 | left in big_buffer by smtp_write_command() for use in error messages. */ | |
1684 | ||
1685 | smtp_command = big_buffer; | |
1686 | ||
1687 | /* Tell the remote who we are... | |
1688 | ||
1689 | February 1998: A convention has evolved that ESMTP-speaking MTAs include the | |
1690 | string "ESMTP" in their greeting lines, so make Exim send EHLO if the | |
1691 | greeting is of this form. The assumption was that the far end supports it | |
1692 | properly... but experience shows that there are some that give 5xx responses, | |
1693 | even though the banner includes "ESMTP" (there's a bloody-minded one that | |
1694 | says "ESMTP not spoken here"). Cope with that case. | |
1695 | ||
1696 | September 2000: Time has passed, and it seems reasonable now to always send | |
1697 | EHLO at the start. It is also convenient to make the change while installing | |
1698 | the TLS stuff. | |
1699 | ||
1700 | July 2003: Joachim Wieland met a broken server that advertises "PIPELINING" | |
1701 | but times out after sending MAIL FROM, RCPT TO and DATA all together. There | |
1702 | would be no way to send out the mails, so there is now a host list | |
1703 | "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the | |
1704 | PIPELINING problem as well. Maybe it can also be useful to cure other | |
1705 | problems with broken servers. | |
1706 | ||
1707 | Exim originally sent "Helo" at this point and ran for nearly a year that way. | |
1708 | Then somebody tried it with a Microsoft mailer... It seems that all other | |
1709 | mailers use upper case for some reason (the RFC is quite clear about case | |
1710 | independence) so, for peace of mind, I gave in. */ | |
1711 | ||
d093f8e5 | 1712 | sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK; |
0756eb3c | 1713 | |
061b7ebd PP |
1714 | /* Alas; be careful, since this goto is not an error-out, so conceivably |
1715 | we might set data between here and the target which we assume to exist | |
1716 | and be usable. I can see this coming back to bite us. */ | |
a7538db1 | 1717 | #ifdef SUPPORT_TLS |
d093f8e5 | 1718 | if (sx->smtps) |
061b7ebd | 1719 | { |
2d14f397 | 1720 | smtp_peer_options |= PEER_OFFERED_TLS; |
061b7ebd | 1721 | suppress_tls = FALSE; |
d093f8e5 | 1722 | sx->ob->tls_tempfail_tryclear = FALSE; |
061b7ebd PP |
1723 | smtp_command = US"SSL-on-connect"; |
1724 | goto TLS_NEGOTIATE; | |
1725 | } | |
a7538db1 | 1726 | #endif |
061b7ebd | 1727 | |
d093f8e5 | 1728 | if (sx->esmtp) |
0756eb3c | 1729 | { |
d093f8e5 JH |
1730 | if (smtp_write_command(&sx->outblock, FALSE, "%s %s\r\n", |
1731 | sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0) | |
0756eb3c | 1732 | goto SEND_FAILED; |
d093f8e5 JH |
1733 | sx->esmtp_sent = TRUE; |
1734 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', | |
1735 | sx->ob->command_timeout)) | |
0756eb3c | 1736 | { |
d093f8e5 | 1737 | if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp) |
895fbaf2 JH |
1738 | { |
1739 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 1740 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
1741 | #endif |
1742 | goto RESPONSE_FAILED; | |
1743 | } | |
d093f8e5 | 1744 | sx->esmtp = FALSE; |
0756eb3c | 1745 | } |
895fbaf2 | 1746 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1747 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 | 1748 | #endif |
0756eb3c PH |
1749 | } |
1750 | else | |
0756eb3c PH |
1751 | DEBUG(D_transport) |
1752 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
0756eb3c | 1753 | |
d093f8e5 | 1754 | if (!sx->esmtp) |
0756eb3c | 1755 | { |
895fbaf2 | 1756 | BOOL good_response; |
d093f8e5 JH |
1757 | int n = sizeof(sx->buffer); |
1758 | uschar * rsp = sx->buffer; | |
a57ce043 | 1759 | |
d093f8e5 JH |
1760 | if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2) |
1761 | { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; } | |
895fbaf2 | 1762 | |
d093f8e5 | 1763 | if (smtp_write_command(&sx->outblock, FALSE, "HELO %s\r\n", sx->helo_data) < 0) |
0756eb3c | 1764 | goto SEND_FAILED; |
d093f8e5 JH |
1765 | good_response = smtp_read_response(&sx->inblock, rsp, n, |
1766 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1767 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1768 | sx->helo_response = string_copy(rsp); |
895fbaf2 | 1769 | #endif |
a57ce043 JH |
1770 | if (!good_response) |
1771 | { | |
1772 | /* Handle special logging for a closed connection after HELO | |
1773 | when had previously sent EHLO */ | |
1774 | ||
d093f8e5 | 1775 | if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET)) |
a57ce043 | 1776 | { |
d093f8e5 | 1777 | sx->send_quit = FALSE; |
a57ce043 JH |
1778 | save_errno = ERRNO_SMTPCLOSED; |
1779 | message = string_sprintf("Remote host closed connection " | |
1780 | "in response to %s (EHLO response was: %s)", | |
d093f8e5 | 1781 | smtp_command, sx->buffer); |
a57ce043 JH |
1782 | goto FAILED; |
1783 | } | |
d093f8e5 | 1784 | Ustrncpy(sx->buffer, rsp, sizeof(sx->buffer)/2); |
a57ce043 JH |
1785 | goto RESPONSE_FAILED; |
1786 | } | |
0756eb3c PH |
1787 | } |
1788 | ||
d093f8e5 | 1789 | sx->peer_offered = smtp_peer_options = 0; |
2d14f397 | 1790 | |
d093f8e5 | 1791 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 1792 | { |
e9166683 | 1793 | sx->peer_offered = ehlo_response(sx->buffer, |
ff5aac2b | 1794 | PEER_OFFERED_TLS /* others checked later */ |
9094b84b | 1795 | ); |
f1513293 | 1796 | |
0756eb3c PH |
1797 | /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */ |
1798 | ||
a7538db1 | 1799 | #ifdef SUPPORT_TLS |
d093f8e5 | 1800 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_TLS; |
7ade712c | 1801 | #endif |
2d14f397 | 1802 | } |
0756eb3c PH |
1803 | } |
1804 | ||
1805 | /* For continuing deliveries down the same channel, the socket is the standard | |
1806 | input, and we don't need to redo EHLO here (but may need to do so for TLS - see | |
1807 | below). Set up the pointer to where subsequent commands will be left, for | |
2d14f397 | 1808 | error messages. Note that smtp_peer_options will have been |
0756eb3c PH |
1809 | set from the command line if they were set in the process that passed the |
1810 | connection on. */ | |
1811 | ||
895fbaf2 | 1812 | /*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c |
4c04137d | 1813 | as the continue goes via transport_pass_socket() and doublefork and exec. |
895fbaf2 JH |
1814 | It does not wait. Unclear how we keep separate host's responses |
1815 | separate - we could match up by host ip+port as a bodge. */ | |
1816 | ||
0756eb3c PH |
1817 | else |
1818 | { | |
d093f8e5 | 1819 | sx->inblock.sock = sx->outblock.sock = fileno(stdin); |
0756eb3c | 1820 | smtp_command = big_buffer; |
d093f8e5 | 1821 | sx->host->port = sx->port; /* Record the port that was used */ |
02b41d71 | 1822 | sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */ |
0756eb3c PH |
1823 | } |
1824 | ||
1825 | /* If TLS is available on this connection, whether continued or not, attempt to | |
1826 | start up a TLS session, unless the host is in hosts_avoid_tls. If successful, | |
1827 | send another EHLO - the server may give a different answer in secure mode. We | |
1828 | use a separate buffer for reading the response to STARTTLS so that if it is | |
1829 | negative, the original EHLO data is available for subsequent analysis, should | |
1830 | the client not be required to use TLS. If the response is bad, copy the buffer | |
1831 | for error analysis. */ | |
1832 | ||
1833 | #ifdef SUPPORT_TLS | |
2d14f397 | 1834 | if ( smtp_peer_options & PEER_OFFERED_TLS |
5130845b | 1835 | && !suppress_tls |
02b41d71 | 1836 | && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK |
e9166683 | 1837 | && ( !sx->verify |
02b41d71 JH |
1838 | || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK |
1839 | ) ) | |
0756eb3c PH |
1840 | { |
1841 | uschar buffer2[4096]; | |
d093f8e5 | 1842 | if (smtp_write_command(&sx->outblock, FALSE, "STARTTLS\r\n") < 0) |
0756eb3c PH |
1843 | goto SEND_FAILED; |
1844 | ||
1845 | /* If there is an I/O error, transmission of this message is deferred. If | |
1846 | there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is | |
1847 | false, we also defer. However, if there is a temporary rejection of STARTTLS | |
1848 | and tls_tempfail_tryclear is true, or if there is an outright rejection of | |
1849 | STARTTLS, we carry on. This means we will try to send the message in clear, | |
1850 | unless the host is in hosts_require_tls (tested below). */ | |
1851 | ||
d093f8e5 JH |
1852 | if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2', |
1853 | sx->ob->command_timeout)) | |
0756eb3c | 1854 | { |
4b0fe319 JH |
1855 | if ( errno != 0 |
1856 | || buffer2[0] == 0 | |
d093f8e5 | 1857 | || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear) |
4b0fe319 | 1858 | ) |
0dda4340 | 1859 | { |
d093f8e5 | 1860 | Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer)); |
0756eb3c | 1861 | goto RESPONSE_FAILED; |
0dda4340 | 1862 | } |
0756eb3c PH |
1863 | } |
1864 | ||
1865 | /* STARTTLS accepted: try to negotiate a TLS session. */ | |
1866 | ||
1867 | else | |
061b7ebd | 1868 | TLS_NEGOTIATE: |
0756eb3c | 1869 | { |
d093f8e5 JH |
1870 | address_item * addr; |
1871 | int rc = tls_client_start(sx->inblock.sock, sx->host, sx->addrlist, sx->tblock | |
0e66b3b6 | 1872 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 1873 | , sx->dane ? &tlsa_dnsa : NULL |
0e66b3b6 JH |
1874 | # endif |
1875 | ); | |
0756eb3c PH |
1876 | |
1877 | /* TLS negotiation failed; give an error. From outside, this function may | |
1878 | be called again to try in clear on a new connection, if the options permit | |
1879 | it for this host. */ | |
1880 | ||
1881 | if (rc != OK) | |
1882 | { | |
6ebd79ec | 1883 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 1884 | if (sx->dane) log_write(0, LOG_MAIN, |
4b0fe319 | 1885 | "DANE attempt failed; no TLS connection to %s [%s]", |
d093f8e5 | 1886 | sx->host->name, sx->host->address); |
6ebd79ec JH |
1887 | # endif |
1888 | ||
0756eb3c PH |
1889 | save_errno = ERRNO_TLSFAILURE; |
1890 | message = US"failure while setting up TLS session"; | |
d093f8e5 | 1891 | sx->send_quit = FALSE; |
0756eb3c PH |
1892 | goto TLS_FAILED; |
1893 | } | |
1894 | ||
1895 | /* TLS session is set up */ | |
1896 | ||
2d14f397 | 1897 | smtp_peer_options_wrap = smtp_peer_options; |
d093f8e5 | 1898 | for (addr = sx->addrlist; addr; addr = addr->next) |
5ca2a9a1 PH |
1899 | if (addr->transport_return == PENDING_DEFER) |
1900 | { | |
817d9f57 | 1901 | addr->cipher = tls_out.cipher; |
9d1c15ef JH |
1902 | addr->ourcert = tls_out.ourcert; |
1903 | addr->peercert = tls_out.peercert; | |
817d9f57 | 1904 | addr->peerdn = tls_out.peerdn; |
018058b2 | 1905 | addr->ocsp = tls_out.ocsp; |
5ca2a9a1 | 1906 | } |
0756eb3c PH |
1907 | } |
1908 | } | |
1909 | ||
061b7ebd PP |
1910 | /* if smtps, we'll have smtp_command set to something else; always safe to |
1911 | reset it here. */ | |
1912 | smtp_command = big_buffer; | |
1913 | ||
41c7c167 PH |
1914 | /* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If |
1915 | helo_data is null, we are dealing with a connection that was passed from | |
1916 | another process, and so we won't have expanded helo_data above. We have to | |
1917 | expand it here. $sending_ip_address and $sending_port are set up right at the | |
1918 | start of the Exim process (in exim.c). */ | |
0756eb3c | 1919 | |
817d9f57 | 1920 | if (tls_out.active >= 0) |
0756eb3c | 1921 | { |
061b7ebd | 1922 | char *greeting_cmd; |
895fbaf2 JH |
1923 | BOOL good_response; |
1924 | ||
d093f8e5 | 1925 | if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data))) |
41c7c167 | 1926 | { |
d093f8e5 JH |
1927 | uschar *message = string_sprintf("failed to expand helo_data: %s", |
1928 | expand_string_message); | |
1929 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
1930 | yield = DEFER; | |
1931 | goto SEND_QUIT; | |
41c7c167 PH |
1932 | } |
1933 | ||
0d0e4455 | 1934 | /* For SMTPS we need to wait for the initial OK response. */ |
d093f8e5 | 1935 | if (sx->smtps) |
061b7ebd | 1936 | { |
d093f8e5 JH |
1937 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1938 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1939 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1940 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
1941 | #endif |
1942 | if (!good_response) goto RESPONSE_FAILED; | |
0d0e4455 PP |
1943 | } |
1944 | ||
d093f8e5 | 1945 | if (sx->esmtp) |
0d0e4455 PP |
1946 | greeting_cmd = "EHLO"; |
1947 | else | |
1948 | { | |
1949 | greeting_cmd = "HELO"; | |
1950 | DEBUG(D_transport) | |
1951 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
061b7ebd PP |
1952 | } |
1953 | ||
d093f8e5 JH |
1954 | if (smtp_write_command(&sx->outblock, FALSE, "%s %s\r\n", |
1955 | sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0) | |
0756eb3c | 1956 | goto SEND_FAILED; |
d093f8e5 JH |
1957 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1958 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1959 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1960 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
1961 | #endif |
1962 | if (!good_response) goto RESPONSE_FAILED; | |
2d14f397 | 1963 | smtp_peer_options = 0; |
0756eb3c PH |
1964 | } |
1965 | ||
1966 | /* If the host is required to use a secure channel, ensure that we | |
1967 | have one. */ | |
1968 | ||
d093f8e5 | 1969 | else if ( sx->smtps |
0e66b3b6 | 1970 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 1971 | || sx->dane |
0e66b3b6 | 1972 | # endif |
d093f8e5 | 1973 | || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK |
7a31d643 | 1974 | ) |
0756eb3c PH |
1975 | { |
1976 | save_errno = ERRNO_TLSREQUIRED; | |
c562fd30 | 1977 | message = string_sprintf("a TLS session is required, but %s", |
2d14f397 JH |
1978 | smtp_peer_options & PEER_OFFERED_TLS |
1979 | ? "an attempt to start TLS failed" : "the server did not offer TLS support"); | |
0756eb3c PH |
1980 | goto TLS_FAILED; |
1981 | } | |
0e66b3b6 | 1982 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
1983 | |
1984 | /* If TLS is active, we have just started it up and re-done the EHLO command, | |
1985 | so its response needs to be analyzed. If TLS is not active and this is a | |
1986 | continued session down a previously-used socket, we haven't just done EHLO, so | |
1987 | we skip this. */ | |
1988 | ||
1989 | if (continue_hostname == NULL | |
a7538db1 | 1990 | #ifdef SUPPORT_TLS |
817d9f57 | 1991 | || tls_out.active >= 0 |
a7538db1 | 1992 | #endif |
0756eb3c PH |
1993 | ) |
1994 | { | |
d093f8e5 | 1995 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 1996 | { |
e9166683 | 1997 | sx->peer_offered = ehlo_response(sx->buffer, |
d093f8e5 JH |
1998 | 0 /* no TLS */ |
1999 | | (sx->lmtp && sx->ob->lmtp_ignore_quota ? PEER_OFFERED_IGNQ : 0) | |
2000 | | PEER_OFFERED_CHUNKING | |
2001 | | PEER_OFFERED_PRDR | |
9094b84b | 2002 | #ifdef SUPPORT_I18N |
d093f8e5 JH |
2003 | | (sx->addrlist->prop.utf8_msg ? PEER_OFFERED_UTF8 : 0) |
2004 | /*XXX if we hand peercaps on to continued-conn processes, | |
2005 | must not depend on this addr */ | |
9094b84b | 2006 | #endif |
d093f8e5 JH |
2007 | | PEER_OFFERED_DSN |
2008 | | PEER_OFFERED_PIPE | |
2009 | | (sx->ob->size_addition >= 0 ? PEER_OFFERED_SIZE : 0) | |
9094b84b JH |
2010 | ); |
2011 | ||
2d14f397 JH |
2012 | /* Set for IGNOREQUOTA if the response to LHLO specifies support and the |
2013 | lmtp_ignore_quota option was set. */ | |
f1513293 | 2014 | |
d093f8e5 | 2015 | sx->igquotstr = sx->peer_offered & PEER_OFFERED_IGNQ ? US" IGNOREQUOTA" : US""; |
f1513293 | 2016 | |
2d14f397 JH |
2017 | /* If the response to EHLO specified support for the SIZE parameter, note |
2018 | this, provided size_addition is non-negative. */ | |
f1513293 | 2019 | |
d093f8e5 | 2020 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_SIZE; |
0756eb3c | 2021 | |
2d14f397 JH |
2022 | /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched |
2023 | the current host, esmtp will be false, so PIPELINING can never be used. If | |
2024 | the current host matches hosts_avoid_pipelining, don't do it. */ | |
0756eb3c | 2025 | |
d093f8e5 JH |
2026 | if ( sx->peer_offered & PEER_OFFERED_PIPE |
2027 | && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK) | |
2d14f397 | 2028 | smtp_peer_options |= PEER_OFFERED_PIPE; |
0756eb3c | 2029 | |
2d14f397 JH |
2030 | DEBUG(D_transport) debug_printf("%susing PIPELINING\n", |
2031 | smtp_peer_options & PEER_OFFERED_PIPE ? "" : "not "); | |
0756eb3c | 2032 | |
d093f8e5 JH |
2033 | if ( sx->peer_offered & PEER_OFFERED_CHUNKING |
2034 | && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK) | |
2035 | sx->peer_offered &= ~PEER_OFFERED_CHUNKING; | |
f98442df | 2036 | |
d093f8e5 | 2037 | if (sx->peer_offered & PEER_OFFERED_CHUNKING) |
2d14f397 | 2038 | {DEBUG(D_transport) debug_printf("CHUNKING usable\n");} |
0756eb3c | 2039 | |
8ccd00b1 | 2040 | #ifndef DISABLE_PRDR |
d093f8e5 JH |
2041 | if ( sx->peer_offered & PEER_OFFERED_PRDR |
2042 | && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK) | |
2043 | sx->peer_offered &= ~PEER_OFFERED_PRDR; | |
fd98a5c6 | 2044 | |
d093f8e5 | 2045 | if (sx->peer_offered & PEER_OFFERED_PRDR) |
2d14f397 | 2046 | {DEBUG(D_transport) debug_printf("PRDR usable\n");} |
fd98a5c6 JH |
2047 | #endif |
2048 | ||
2d14f397 | 2049 | /* Note if the server supports DSN */ |
d093f8e5 | 2050 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_DSN; |
2d14f397 | 2051 | DEBUG(D_transport) debug_printf("%susing DSN\n", |
d093f8e5 | 2052 | sx->peer_offered & PEER_OFFERED_DSN ? "" : "not "); |
6c1c3d1d | 2053 | |
2d14f397 JH |
2054 | /* Note if the response to EHLO specifies support for the AUTH extension. |
2055 | If it has, check that this host is one we want to authenticate to, and do | |
2056 | the business. The host name and address must be available when the | |
2057 | authenticator's client driver is running. */ | |
0756eb3c | 2058 | |
d093f8e5 JH |
2059 | switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host, |
2060 | sx->ob, sx->esmtp, &sx->inblock, &sx->outblock)) | |
2d14f397 JH |
2061 | { |
2062 | default: goto SEND_QUIT; | |
2063 | case OK: break; | |
2064 | case FAIL_SEND: goto SEND_FAILED; | |
2065 | case FAIL: goto RESPONSE_FAILED; | |
2066 | } | |
0756eb3c PH |
2067 | } |
2068 | } | |
2d14f397 | 2069 | pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE); |
0756eb3c PH |
2070 | |
2071 | /* The setting up of the SMTP call is now complete. Any subsequent errors are | |
2072 | message-specific. */ | |
2073 | ||
d093f8e5 | 2074 | sx->setting_up = FALSE; |
0756eb3c | 2075 | |
8c5d388a | 2076 | #ifdef SUPPORT_I18N |
d093f8e5 | 2077 | if (sx->addrlist->prop.utf8_msg) |
9094b84b | 2078 | { |
d093f8e5 JH |
2079 | sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt |
2080 | && !sx->addrlist->prop.utf8_downcvt_maybe; | |
2081 | DEBUG(D_transport) if (!sx->utf8_needed) | |
59a286ef | 2082 | debug_printf("utf8: %s downconvert\n", |
d093f8e5 | 2083 | sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional"); |
9094b84b JH |
2084 | } |
2085 | ||
7ade712c | 2086 | /* If this is an international message we need the host to speak SMTPUTF8 */ |
d093f8e5 | 2087 | if (sx->utf8_needed && !(sx->peer_offered & PEER_OFFERED_UTF8)) |
7ade712c JH |
2088 | { |
2089 | errno = ERRNO_UTF8_FWD; | |
2090 | goto RESPONSE_FAILED; | |
2091 | } | |
2092 | #endif | |
2093 | ||
d093f8e5 JH |
2094 | return OK; |
2095 | ||
2096 | ||
2097 | { | |
2098 | int code; | |
2099 | uschar * set_message; | |
2100 | ||
2101 | RESPONSE_FAILED: | |
2102 | { | |
2103 | save_errno = errno; | |
2104 | message = NULL; | |
2105 | sx->send_quit = check_response(sx->host, &save_errno, sx->addrlist->more_errno, | |
2106 | sx->buffer, &code, &message, &pass_message); | |
2107 | goto FAILED; | |
2108 | } | |
2109 | ||
2110 | SEND_FAILED: | |
2111 | { | |
2112 | save_errno = errno; | |
2113 | code = '4'; | |
2114 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
2115 | sx->host->name, sx->host->address, strerror(save_errno)); | |
2116 | sx->send_quit = FALSE; | |
2117 | goto FAILED; | |
2118 | } | |
2119 | ||
2120 | /* This label is jumped to directly when a TLS negotiation has failed, | |
2121 | or was not done for a host for which it is required. Values will be set | |
2122 | in message and save_errno, and setting_up will always be true. Treat as | |
2123 | a temporary error. */ | |
2124 | ||
2125 | #ifdef SUPPORT_TLS | |
2126 | TLS_FAILED: | |
2127 | code = '4'; | |
2128 | #endif | |
2129 | ||
2130 | /* The failure happened while setting up the call; see if the failure was | |
2131 | a 5xx response (this will either be on connection, or following HELO - a 5xx | |
2132 | after EHLO causes it to try HELO). If so, fail all addresses, as this host is | |
2133 | never going to accept them. For other errors during setting up (timeouts or | |
2134 | whatever), defer all addresses, and yield DEFER, so that the host is not | |
2135 | tried again for a while. */ | |
2136 | ||
2137 | FAILED: | |
2138 | sx->ok = FALSE; /* For when reached by GOTO */ | |
2139 | set_message = message; | |
2140 | ||
2141 | yield = code == '5' | |
2142 | #ifdef SUPPORT_I18N | |
2143 | || errno == ERRNO_UTF8_FWD | |
2144 | #endif | |
2145 | ? FAIL : DEFER; | |
2146 | ||
2147 | set_errno(sx->addrlist, save_errno, set_message, yield, pass_message, sx->host | |
2148 | #ifdef EXPERIMENTAL_DSN_INFO | |
2149 | , sx->smtp_greeting, sx->helo_response | |
2150 | #endif | |
2151 | ); | |
2152 | } | |
2153 | ||
2154 | ||
2155 | SEND_QUIT: | |
2156 | ||
2157 | if (sx->send_quit) | |
2158 | (void)smtp_write_command(&sx->outblock, FALSE, "QUIT\r\n"); | |
2159 | ||
d093f8e5 JH |
2160 | #ifdef SUPPORT_TLS |
2161 | tls_close(FALSE, TRUE); | |
2162 | #endif | |
2163 | ||
2164 | /* Close the socket, and return the appropriate value, first setting | |
2165 | works because the NULL setting is passed back to the calling process, and | |
2166 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
2167 | ||
2168 | If all went well and continue_more is set, we shouldn't actually get here if | |
2169 | there are further addresses, as the return above will be taken. However, | |
2170 | writing RSET might have failed, or there may be other addresses whose hosts are | |
2171 | specified in the transports, and therefore not visible at top level, in which | |
2172 | case continue_more won't get set. */ | |
2173 | ||
2174 | HDEBUG(D_transport|D_acl|D_v) debug_printf(" SMTP(close)>>\n"); | |
2175 | if (sx->send_quit) | |
2176 | { | |
2177 | shutdown(sx->outblock.sock, SHUT_WR); | |
2178 | if (fcntl(sx->inblock.sock, F_SETFL, O_NONBLOCK) == 0) | |
2179 | for (rc = 16; read(sx->inblock.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;) | |
2180 | rc--; /* drain socket */ | |
02b41d71 | 2181 | sx->send_quit = FALSE; |
d093f8e5 JH |
2182 | } |
2183 | (void)close(sx->inblock.sock); | |
02b41d71 | 2184 | sx->inblock.sock = sx->outblock.sock = -1; |
d093f8e5 JH |
2185 | |
2186 | #ifndef DISABLE_EVENT | |
2187 | (void) event_raise(sx->tblock->event_action, US"tcp:close", NULL); | |
2188 | #endif | |
2189 | ||
2190 | continue_transport = NULL; | |
2191 | continue_hostname = NULL; | |
2192 | return yield; | |
2193 | } | |
2194 | ||
2195 | ||
9be4572b JH |
2196 | |
2197 | ||
2198 | /* Create the string of options that will be appended to the MAIL FROM: | |
2199 | in the connection context buffer */ | |
2200 | ||
2201 | static int | |
2202 | build_mailcmd_options(smtp_context * sx, address_item * addrlist) | |
2203 | { | |
2204 | uschar * p = sx->buffer; | |
2205 | address_item * addr; | |
2206 | int address_count; | |
2207 | ||
2208 | *p = 0; | |
2209 | ||
2210 | /* If we know the receiving MTA supports the SIZE qualification, | |
2211 | send it, adding something to the message size to allow for imprecision | |
2212 | and things that get added en route. Exim keeps the number of lines | |
2213 | in a message, so we can give an accurate value for the original message, but we | |
2214 | need some additional to handle added headers. (Double "." characters don't get | |
2215 | included in the count.) */ | |
2216 | ||
2217 | if (sx->peer_offered & PEER_OFFERED_SIZE) | |
2218 | { | |
2219 | sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition); | |
2220 | while (*p) p++; | |
2221 | } | |
2222 | ||
2223 | #ifndef DISABLE_PRDR | |
2224 | /* If it supports Per-Recipient Data Reponses, and we have omre than one recipient, | |
2225 | request that */ | |
2226 | ||
2227 | sx->prdr_active = FALSE; | |
2228 | if (sx->peer_offered & PEER_OFFERED_PRDR) | |
2229 | for (addr = addrlist; addr; addr = addr->next) | |
2230 | if (addr->transport_return == PENDING_DEFER) | |
2231 | { | |
2232 | for (addr = addr->next; addr; addr = addr->next) | |
2233 | if (addr->transport_return == PENDING_DEFER) | |
2234 | { /* at least two recipients to send */ | |
2235 | sx->prdr_active = TRUE; | |
2236 | sprintf(CS p, " PRDR"); p += 5; | |
2237 | break; | |
2238 | } | |
2239 | break; | |
2240 | } | |
2241 | #endif | |
2242 | ||
2243 | #ifdef SUPPORT_I18N | |
2244 | /* If it supports internationalised messages, and this meesage need that, | |
2245 | request it */ | |
2246 | ||
2247 | if ( sx->peer_offered & PEER_OFFERED_UTF8 | |
2248 | && addrlist->prop.utf8_msg | |
2249 | && !addrlist->prop.utf8_downcvt | |
2250 | ) | |
2251 | Ustrcpy(p, " SMTPUTF8"), p += 9; | |
2252 | #endif | |
2253 | ||
2254 | /* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */ | |
2255 | for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0; | |
2256 | addr && address_count < sx->max_rcpt; | |
2257 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2258 | { | |
2259 | address_count++; | |
2260 | if (!(addr->dsn_flags & rf_dsnlasthop)) | |
2261 | { | |
2262 | sx->dsn_all_lasthop = FALSE; | |
2263 | break; | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | /* Add any DSN flags to the mail command */ | |
2268 | ||
2269 | if (sx->peer_offered & PEER_OFFERED_DSN && !sx->dsn_all_lasthop) | |
2270 | { | |
2271 | if (dsn_ret == dsn_ret_hdrs) | |
2272 | { Ustrcpy(p, " RET=HDRS"); p += 9; } | |
2273 | else if (dsn_ret == dsn_ret_full) | |
2274 | { Ustrcpy(p, " RET=FULL"); p += 9; } | |
2275 | ||
2276 | if (dsn_envid) | |
2277 | { | |
2278 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid); | |
2279 | while (*p) p++; | |
2280 | } | |
2281 | } | |
2282 | ||
2283 | /* If an authenticated_sender override has been specified for this transport | |
2284 | instance, expand it. If the expansion is forced to fail, and there was already | |
2285 | an authenticated_sender for this message, the original value will be used. | |
2286 | Other expansion failures are serious. An empty result is ignored, but there is | |
2287 | otherwise no check - this feature is expected to be used with LMTP and other | |
2288 | cases where non-standard addresses (e.g. without domains) might be required. */ | |
2289 | ||
2290 | if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob)) | |
2291 | return ERROR; | |
2292 | ||
2293 | return OK; | |
2294 | } | |
2295 | ||
2296 | ||
2297 | static void | |
2298 | build_rcptcmd_options(smtp_context * sx, const address_item * addr) | |
2299 | { | |
2300 | uschar * p = sx->buffer; | |
2301 | *p = 0; | |
2302 | ||
2303 | /* Add any DSN flags to the rcpt command */ | |
2304 | ||
2305 | if (sx->peer_offered & PEER_OFFERED_DSN && !(addr->dsn_flags & rf_dsnlasthop)) | |
2306 | { | |
2307 | if (addr->dsn_flags & rf_dsnflags) | |
2308 | { | |
2309 | int i; | |
2310 | BOOL first = TRUE; | |
2311 | ||
2312 | Ustrcpy(p, " NOTIFY="); | |
2313 | while (*p) p++; | |
2314 | for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i]) | |
2315 | { | |
2316 | if (!first) *p++ = ','; | |
2317 | first = FALSE; | |
2318 | Ustrcpy(p, rf_names[i]); | |
2319 | while (*p) p++; | |
2320 | } | |
2321 | } | |
2322 | ||
2323 | if (addr->dsn_orcpt) | |
2324 | { | |
2325 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s", | |
2326 | addr->dsn_orcpt); | |
2327 | while (*p) p++; | |
2328 | } | |
2329 | } | |
2330 | } | |
2331 | ||
2332 | ||
d9c3c8ed JH |
2333 | |
2334 | /* | |
2335 | Return: | |
e9166683 JH |
2336 | 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL) |
2337 | -1 MAIL response error | |
2338 | -2 any non-MAIL read i/o error | |
2339 | -3 non-MAIL response timeout | |
2340 | -4 internal error; channel still usable | |
2341 | -5 transmit failed | |
d9c3c8ed JH |
2342 | */ |
2343 | ||
2344 | int | |
2345 | smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield) | |
2346 | { | |
2347 | address_item * addr; | |
2348 | int address_count; | |
2349 | int rc; | |
2350 | ||
2351 | if (build_mailcmd_options(sx, sx->first_addr) != OK) | |
2352 | { | |
2353 | *yield = ERROR; | |
e9166683 | 2354 | return -4; |
d9c3c8ed JH |
2355 | } |
2356 | ||
2357 | /* From here until we send the DATA command, we can make use of PIPELINING | |
2358 | if the server host supports it. The code has to be able to check the responses | |
2359 | at any point, for when the buffer fills up, so we write it totally generally. | |
2360 | When PIPELINING is off, each command written reports that it has flushed the | |
2361 | buffer. */ | |
2362 | ||
2363 | sx->pending_MAIL = TRUE; /* The block starts with MAIL */ | |
2364 | ||
2365 | { | |
2366 | uschar * s = sx->from_addr; | |
2367 | #ifdef SUPPORT_I18N | |
2368 | uschar * errstr = NULL; | |
2369 | ||
2370 | /* If we must downconvert, do the from-address here. Remember we had to | |
2371 | for the to-addresses (done below), and also (ugly) for re-doing when building | |
2372 | the delivery log line. */ | |
2373 | ||
2374 | if ( sx->addrlist->prop.utf8_msg | |
2375 | && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & PEER_OFFERED_UTF8)) | |
2376 | ) | |
2377 | { | |
2378 | if (s = string_address_utf8_to_alabel(s, &errstr), errstr) | |
2379 | { | |
2380 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE); | |
2381 | *yield = ERROR; | |
e9166683 | 2382 | return -4; |
d9c3c8ed JH |
2383 | } |
2384 | setflag(sx->addrlist, af_utf8_downcvt); | |
2385 | } | |
2386 | #endif | |
2387 | ||
2388 | rc = smtp_write_command(&sx->outblock, pipelining_active, | |
2389 | "MAIL FROM:<%s>%s\r\n", s, sx->buffer); | |
2390 | } | |
2391 | ||
2392 | mail_command = string_copy(big_buffer); /* Save for later error message */ | |
2393 | ||
2394 | switch(rc) | |
2395 | { | |
2396 | case -1: /* Transmission error */ | |
e9166683 | 2397 | return -5; |
d9c3c8ed | 2398 | |
df5b41e3 | 2399 | case +1: /* Cmd was sent */ |
d9c3c8ed JH |
2400 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
2401 | sx->ob->command_timeout)) | |
2402 | { | |
2403 | if (errno == 0 && sx->buffer[0] == '4') | |
2404 | { | |
2405 | errno = ERRNO_MAIL4XX; | |
2406 | sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
2407 | } | |
2408 | return -1; | |
2409 | } | |
2410 | sx->pending_MAIL = FALSE; | |
2411 | break; | |
e9166683 JH |
2412 | |
2413 | /* otherwise zero: command queued for pipeline */ | |
d9c3c8ed JH |
2414 | } |
2415 | ||
2416 | /* Pass over all the relevant recipient addresses for this host, which are the | |
2417 | ones that have status PENDING_DEFER. If we are using PIPELINING, we can send | |
2418 | several before we have to read the responses for those seen so far. This | |
2419 | checking is done by a subroutine because it also needs to be done at the end. | |
2420 | Send only up to max_rcpt addresses at a time, leaving next_addr pointing to | |
2421 | the next one if not all are sent. | |
2422 | ||
2423 | In the MUA wrapper situation, we want to flush the PIPELINING buffer for the | |
2424 | last address because we want to abort if any recipients have any kind of | |
2425 | problem, temporary or permanent. We know that all recipient addresses will have | |
2426 | the PENDING_DEFER status, because only one attempt is ever made, and we know | |
e9166683 JH |
2427 | that max_rcpt will be large, so all addresses will be done at once. |
2428 | ||
2429 | For verify we flush the pipeline after any (the only) rcpt address. */ | |
d9c3c8ed JH |
2430 | |
2431 | for (addr = sx->first_addr, address_count = 0; | |
2432 | addr && address_count < sx->max_rcpt; | |
2433 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2434 | { | |
2435 | int count; | |
2436 | BOOL no_flush; | |
2437 | uschar * rcpt_addr; | |
2438 | ||
2439 | addr->dsn_aware = sx->peer_offered & PEER_OFFERED_DSN | |
2440 | ? dsn_support_yes : dsn_support_no; | |
2441 | ||
2442 | address_count++; | |
e9166683 | 2443 | no_flush = pipelining_active && !sx->verify && (!mua_wrapper || addr->next); |
d9c3c8ed JH |
2444 | |
2445 | build_rcptcmd_options(sx, addr); | |
2446 | ||
2447 | /* Now send the RCPT command, and process outstanding responses when | |
2448 | necessary. After a timeout on RCPT, we just end the function, leaving the | |
2449 | yield as OK, because this error can often mean that there is a problem with | |
2450 | just one address, so we don't want to delay the host. */ | |
2451 | ||
2452 | rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes); | |
2453 | ||
2454 | #ifdef SUPPORT_I18N | |
2455 | if ( testflag(sx->addrlist, af_utf8_downcvt) | |
2456 | && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL)) | |
2457 | ) | |
2458 | { | |
2459 | /*XXX could we use a per-address errstr here? Not fail the whole send? */ | |
2460 | errno = ERRNO_EXPANDFAIL; | |
e9166683 | 2461 | return -5; /*XXX too harsh? */ |
d9c3c8ed JH |
2462 | } |
2463 | #endif | |
2464 | ||
2465 | count = smtp_write_command(&sx->outblock, no_flush, "RCPT TO:<%s>%s%s\r\n", | |
2466 | rcpt_addr, sx->igquotstr, sx->buffer); | |
2467 | ||
e9166683 | 2468 | if (count < 0) return -5; |
d9c3c8ed JH |
2469 | if (count > 0) |
2470 | { | |
df5b41e3 | 2471 | switch(sync_responses(sx, count, 0)) |
d9c3c8ed JH |
2472 | { |
2473 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ | |
2474 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e9166683 | 2475 | break; |
d9c3c8ed JH |
2476 | |
2477 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ | |
2478 | if (!sx->lmtp) /* can't tell about progress yet */ | |
2479 | sx->completed_addr = TRUE; | |
2480 | case 0: /* No 2xx or 5xx, but no probs */ | |
2481 | break; | |
2482 | ||
e9166683 JH |
2483 | case -1: return -3; /* Timeout on RCPT */ |
2484 | case -2: return -2; /* non-MAIL read i/o error */ | |
2485 | default: return -1; /* any MAIL error */ | |
d9c3c8ed JH |
2486 | } |
2487 | sx->pending_MAIL = FALSE; /* Dealt with MAIL */ | |
2488 | } | |
2489 | } /* Loop for next address */ | |
2490 | ||
2491 | sx->next_addr = addr; | |
2492 | return 0; | |
2493 | } | |
2494 | ||
2495 | ||
d093f8e5 JH |
2496 | /************************************************* |
2497 | * Deliver address list to given host * | |
2498 | *************************************************/ | |
2499 | ||
2500 | /* If continue_hostname is not null, we get here only when continuing to | |
2501 | deliver down an existing channel. The channel was passed as the standard | |
2502 | input. TLS is never active on a passed channel; the previous process always | |
2503 | closes it down before passing the connection on. | |
2504 | ||
2505 | Otherwise, we have to make a connection to the remote host, and do the | |
2506 | initial protocol exchange. | |
2507 | ||
2508 | When running as an MUA wrapper, if the sender or any recipient is rejected, | |
2509 | temporarily or permanently, we force failure for all recipients. | |
2510 | ||
2511 | Arguments: | |
2512 | addrlist chain of potential addresses to deliver; only those whose | |
2513 | transport_return field is set to PENDING_DEFER are currently | |
2514 | being processed; others should be skipped - they have either | |
2515 | been delivered to an earlier host or IP address, or been | |
2516 | failed by one of them. | |
2517 | host host to deliver to | |
2518 | host_af AF_INET or AF_INET6 | |
2519 | port default TCP/IP port to use, in host byte order | |
2520 | interface interface to bind to, or NULL | |
2521 | tblock transport instance block | |
2522 | message_defer set TRUE if yield is OK, but all addresses were deferred | |
2523 | because of a non-recipient, non-host failure, that is, a | |
2524 | 4xx response to MAIL FROM, DATA, or ".". This is a defer | |
2525 | that is specific to the message. | |
2526 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for | |
2527 | a second attempt after TLS initialization fails | |
2528 | ||
2529 | Returns: OK - the connection was made and the delivery attempted; | |
2530 | the result for each address is in its data block. | |
2531 | DEFER - the connection could not be made, or something failed | |
2532 | while setting up the SMTP session, or there was a | |
2533 | non-message-specific error, such as a timeout. | |
2534 | ERROR - a filter command is specified for this transport, | |
2535 | and there was a problem setting it up; OR helo_data | |
2536 | or add_headers or authenticated_sender is specified | |
2537 | for this transport, and the string failed to expand | |
2538 | */ | |
2539 | ||
2540 | static int | |
2541 | smtp_deliver(address_item *addrlist, host_item *host, int host_af, int port, | |
2542 | uschar *interface, transport_instance *tblock, | |
2543 | BOOL *message_defer, BOOL suppress_tls) | |
2544 | { | |
2545 | address_item *addr; | |
d093f8e5 | 2546 | int yield = OK; |
d093f8e5 JH |
2547 | int save_errno; |
2548 | int rc; | |
2549 | time_t start_delivery_time = time(NULL); | |
2550 | ||
d093f8e5 JH |
2551 | BOOL pass_message = FALSE; |
2552 | uschar *message = NULL; | |
2553 | uschar new_message_id[MESSAGE_ID_LENGTH + 1]; | |
2554 | uschar *p; | |
2555 | ||
2556 | smtp_context sx; | |
2557 | ||
2558 | suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */ | |
02b41d71 | 2559 | *message_defer = FALSE; |
d093f8e5 JH |
2560 | |
2561 | sx.addrlist = addrlist; | |
2562 | sx.host = host; | |
2563 | sx.host_af = host_af, | |
2564 | sx.port = port; | |
2565 | sx.interface = interface; | |
02b41d71 | 2566 | sx.helo_data = NULL; |
d093f8e5 | 2567 | sx.tblock = tblock; |
e9166683 | 2568 | sx.verify = FALSE; |
d093f8e5 | 2569 | |
9be4572b JH |
2570 | /* Get the channel set up ready for a message (MAIL FROM being the next |
2571 | SMTP command to send */ | |
2572 | ||
e9166683 | 2573 | if ((rc = smtp_setup_conn(&sx, suppress_tls)) != OK) |
d093f8e5 JH |
2574 | return rc; |
2575 | ||
0756eb3c PH |
2576 | /* If there is a filter command specified for this transport, we can now |
2577 | set it up. This cannot be done until the identify of the host is known. */ | |
2578 | ||
e9166683 | 2579 | if (tblock->filter_command) |
0756eb3c PH |
2580 | { |
2581 | BOOL rc; | |
76ac1b5b JH |
2582 | uschar fbuf[64]; |
2583 | sprintf(CS fbuf, "%.50s transport", tblock->name); | |
0756eb3c | 2584 | rc = transport_set_up_command(&transport_filter_argv, tblock->filter_command, |
76ac1b5b | 2585 | TRUE, DEFER, addrlist, fbuf, NULL); |
9b989985 | 2586 | transport_filter_timeout = tblock->filter_timeout; |
0756eb3c PH |
2587 | |
2588 | /* On failure, copy the error to all addresses, abandon the SMTP call, and | |
2589 | yield ERROR. */ | |
2590 | ||
2591 | if (!rc) | |
2592 | { | |
895fbaf2 JH |
2593 | set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER, |
2594 | FALSE); | |
0756eb3c PH |
2595 | yield = ERROR; |
2596 | goto SEND_QUIT; | |
2597 | } | |
48f1c853 JH |
2598 | |
2599 | if ( transport_filter_argv | |
2600 | && *transport_filter_argv | |
2601 | && **transport_filter_argv | |
d093f8e5 | 2602 | && sx.peer_offered & PEER_OFFERED_CHUNKING |
48f1c853 JH |
2603 | ) |
2604 | { | |
d093f8e5 | 2605 | sx.peer_offered &= ~PEER_OFFERED_CHUNKING; |
48f1c853 JH |
2606 | DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n"); |
2607 | } | |
0756eb3c PH |
2608 | } |
2609 | ||
2610 | ||
2611 | /* For messages that have more than the maximum number of envelope recipients, | |
2612 | we want to send several transactions down the same SMTP connection. (See | |
2613 | comments in deliver.c as to how this reconciles, heuristically, with | |
2614 | remote_max_parallel.) This optimization was added to Exim after the following | |
2615 | code was already working. The simplest way to put it in without disturbing the | |
2616 | code was to use a goto to jump back to this point when there is another | |
2617 | transaction to handle. */ | |
2618 | ||
2619 | SEND_MESSAGE: | |
d9c3c8ed JH |
2620 | sx.from_addr = return_path; |
2621 | sx.first_addr = sx.sync_addr = addrlist; | |
d093f8e5 JH |
2622 | sx.ok = FALSE; |
2623 | sx.send_rset = TRUE; | |
d9c3c8ed | 2624 | sx.completed_addr = FALSE; |
0756eb3c PH |
2625 | |
2626 | ||
9be4572b | 2627 | /* Initiate a message transfer. */ |
6b62e899 | 2628 | |
d9c3c8ed | 2629 | switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield)) |
0756eb3c | 2630 | { |
e9166683 JH |
2631 | case 0: break; |
2632 | case -1: case -2: goto RESPONSE_FAILED; | |
2633 | case -3: goto END_OFF; | |
2634 | case -4: goto SEND_QUIT; | |
2635 | default: goto SEND_FAILED; | |
0756eb3c PH |
2636 | } |
2637 | ||
0756eb3c PH |
2638 | /* If we are an MUA wrapper, abort if any RCPTs were rejected, either |
2639 | permanently or temporarily. We should have flushed and synced after the last | |
2640 | RCPT. */ | |
2641 | ||
2642 | if (mua_wrapper) | |
2643 | { | |
2644 | address_item *badaddr; | |
d9c3c8ed | 2645 | for (badaddr = sx.first_addr; badaddr; badaddr = badaddr->next) |
168dec3b JH |
2646 | if (badaddr->transport_return != PENDING_OK) |
2647 | { | |
2648 | /*XXX could we find a better errno than 0 here? */ | |
895fbaf2 JH |
2649 | set_errno_nohost(addrlist, 0, badaddr->message, FAIL, |
2650 | testflag(badaddr, af_pass_message)); | |
d093f8e5 | 2651 | sx.ok = FALSE; |
168dec3b JH |
2652 | break; |
2653 | } | |
0756eb3c PH |
2654 | } |
2655 | ||
2656 | /* If ok is TRUE, we know we have got at least one good recipient, and must now | |
2657 | send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still | |
2658 | have a good recipient buffered up if we are pipelining. We don't want to waste | |
2659 | time sending DATA needlessly, so we only send it if either ok is TRUE or if we | |
6d5c916c JH |
2660 | are pipelining. The responses are all handled by sync_responses(). |
2661 | If using CHUNKING, do not send a BDAT until we know how big a chunk we want | |
2662 | to send is. */ | |
0756eb3c | 2663 | |
d093f8e5 JH |
2664 | if ( !(sx.peer_offered & PEER_OFFERED_CHUNKING) |
2665 | && (sx.ok || (pipelining_active && !mua_wrapper))) | |
0756eb3c | 2666 | { |
d093f8e5 | 2667 | int count = smtp_write_command(&sx.outblock, FALSE, "DATA\r\n"); |
6d5c916c | 2668 | |
0756eb3c | 2669 | if (count < 0) goto SEND_FAILED; |
df5b41e3 | 2670 | switch(sync_responses(&sx, count, sx.ok ? +1 : -1)) |
0756eb3c | 2671 | { |
d093f8e5 | 2672 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 2673 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
0756eb3c PH |
2674 | break; |
2675 | ||
d093f8e5 | 2676 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 2677 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
0756eb3c PH |
2678 | case 0: break; /* No 2xx or 5xx, but no probs */ |
2679 | ||
2680 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
2681 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
2682 | } | |
0d9fa8c0 | 2683 | pipelining_active = FALSE; |
87cb4a16 | 2684 | data_command = string_copy(big_buffer); /* Save for later error message */ |
0756eb3c PH |
2685 | } |
2686 | ||
0756eb3c PH |
2687 | /* If there were no good recipients (but otherwise there have been no |
2688 | problems), just set ok TRUE, since we have handled address-specific errors | |
2689 | already. Otherwise, it's OK to send the message. Use the check/escape mechanism | |
2690 | for handling the SMTP dot-handling protocol, flagging to apply to headers as | |
2691 | well as body. Set the appropriate timeout value to be used for each chunk. | |
2692 | (Haven't been able to make it work using select() for writing yet.) */ | |
2693 | ||
d093f8e5 | 2694 | if (!(sx.peer_offered & PEER_OFFERED_CHUNKING) && !sx.ok) |
6d5c916c JH |
2695 | { |
2696 | /* Save the first address of the next batch. */ | |
d9c3c8ed | 2697 | sx.first_addr = sx.next_addr; |
6d5c916c | 2698 | |
d093f8e5 | 2699 | sx.ok = TRUE; |
6d5c916c | 2700 | } |
ff5aac2b | 2701 | else |
0756eb3c | 2702 | { |
6b46ecc6 JH |
2703 | transport_ctx tctx = { |
2704 | tblock, | |
2705 | addrlist, | |
2706 | US".", US"..", /* Escaping strings */ | |
65de12cc | 2707 | topt_use_crlf | topt_escape_headers |
6b46ecc6 JH |
2708 | | (tblock->body_only ? topt_no_headers : 0) |
2709 | | (tblock->headers_only ? topt_no_body : 0) | |
2710 | | (tblock->return_path_add ? topt_add_return_path : 0) | |
2711 | | (tblock->delivery_date_add ? topt_add_delivery_date : 0) | |
2712 | | (tblock->envelope_to_add ? topt_add_envelope_to : 0) | |
2713 | }; | |
2714 | ||
6d5c916c JH |
2715 | /* If using CHUNKING we need a callback from the generic transport |
2716 | support to us, for the sending of BDAT smtp commands and the reaping | |
2717 | of responses. The callback needs a whole bunch of state so set up | |
2718 | a transport-context structure to be passed around. */ | |
2719 | ||
d093f8e5 | 2720 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) |
59932f7d | 2721 | { |
65de12cc | 2722 | tctx.check_string = tctx.escape_string = NULL; |
6d5c916c JH |
2723 | tctx.options |= topt_use_bdat; |
2724 | tctx.chunk_cb = smtp_chunk_cmd_callback; | |
e9166683 JH |
2725 | sx.pending_BDAT = FALSE; |
2726 | sx.good_RCPT = sx.ok; | |
2727 | sx.cmd_count = 0; | |
2728 | tctx.smtp_context = &sx; | |
59932f7d JH |
2729 | } |
2730 | else | |
65de12cc | 2731 | tctx.options |= topt_end_dot; |
59932f7d | 2732 | |
6d5c916c | 2733 | /* Save the first address of the next batch. */ |
d9c3c8ed | 2734 | sx.first_addr = sx.next_addr; |
6d5c916c | 2735 | |
e027f545 JH |
2736 | /* Responses from CHUNKING commands go in buffer. Otherwise, |
2737 | there has not been a response. */ | |
2738 | ||
d093f8e5 | 2739 | sx.buffer[0] = 0; |
e027f545 | 2740 | |
0756eb3c | 2741 | sigalrm_seen = FALSE; |
d093f8e5 | 2742 | transport_write_timeout = sx.ob->data_timeout; |
0756eb3c PH |
2743 | smtp_command = US"sending data block"; /* For error messages */ |
2744 | DEBUG(D_transport|D_v) | |
d093f8e5 | 2745 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) |
6d5c916c JH |
2746 | debug_printf(" will write message using CHUNKING\n"); |
2747 | else | |
2748 | debug_printf(" SMTP>> writing message and terminating \".\"\n"); | |
0756eb3c | 2749 | transport_count = 0; |
a7538db1 | 2750 | |
80a47a2c | 2751 | #ifndef DISABLE_DKIM |
d093f8e5 | 2752 | sx.ok = dkim_transport_write_message(sx.inblock.sock, &tctx, &sx.ob->dkim); |
4cd12fe9 | 2753 | #else |
d093f8e5 | 2754 | sx.ok = transport_write_message(sx.inblock.sock, &tctx, 0); |
4cd12fe9 | 2755 | #endif |
0756eb3c PH |
2756 | |
2757 | /* transport_write_message() uses write() because it is called from other | |
2758 | places to write to non-sockets. This means that under some OS (e.g. Solaris) | |
2759 | it can exit with "Broken pipe" as its error. This really means that the | |
2760 | socket got closed at the far end. */ | |
2761 | ||
2762 | transport_write_timeout = 0; /* for subsequent transports */ | |
2763 | ||
2764 | /* Failure can either be some kind of I/O disaster (including timeout), | |
e027f545 JH |
2765 | or the failure of a transport filter or the expansion of added headers. |
2766 | Or, when CHUNKING, it can be a protocol-detected failure. */ | |
0756eb3c | 2767 | |
d093f8e5 | 2768 | if (!sx.ok) |
0756eb3c | 2769 | goto RESPONSE_FAILED; |
0756eb3c PH |
2770 | |
2771 | /* We used to send the terminating "." explicitly here, but because of | |
2772 | buffering effects at both ends of TCP/IP connections, you don't gain | |
2773 | anything by keeping it separate, so it might as well go in the final | |
2774 | data buffer for efficiency. This is now done by setting the topt_end_dot | |
2775 | flag above. */ | |
2776 | ||
2777 | smtp_command = US"end of data"; | |
2778 | ||
e9166683 | 2779 | if (sx.peer_offered & PEER_OFFERED_CHUNKING && sx.cmd_count > 1) |
6d5c916c JH |
2780 | { |
2781 | /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */ | |
e9166683 | 2782 | switch(sync_responses(&sx, sx.cmd_count-1, 0)) |
6d5c916c | 2783 | { |
d093f8e5 | 2784 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 2785 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
6d5c916c JH |
2786 | break; |
2787 | ||
d093f8e5 | 2788 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 2789 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
6d5c916c JH |
2790 | case 0: break; /* No 2xx or 5xx, but no probs */ |
2791 | ||
2792 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
2793 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
2794 | } | |
2795 | } | |
2796 | ||
8ccd00b1 | 2797 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
2798 | /* For PRDR we optionally get a partial-responses warning |
2799 | * followed by the individual responses, before going on with | |
2800 | * the overall response. If we don't get the warning then deal | |
2801 | * with per non-PRDR. */ | |
d093f8e5 | 2802 | if(sx.prdr_active) |
fd98a5c6 | 2803 | { |
d093f8e5 JH |
2804 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3', |
2805 | sx.ob->final_timeout); | |
2806 | if (!sx.ok && errno == 0) switch(sx.buffer[0]) | |
e027f545 | 2807 | { |
d093f8e5 JH |
2808 | case '2': sx.prdr_active = FALSE; |
2809 | sx.ok = TRUE; | |
e027f545 JH |
2810 | break; |
2811 | case '4': errno = ERRNO_DATA4XX; | |
2812 | addrlist->more_errno |= | |
d093f8e5 | 2813 | ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e027f545 JH |
2814 | break; |
2815 | } | |
fd98a5c6 JH |
2816 | } |
2817 | else | |
2818 | #endif | |
2819 | ||
2820 | /* For non-PRDR SMTP, we now read a single response that applies to the | |
2821 | whole message. If it is OK, then all the addresses have been delivered. */ | |
0756eb3c | 2822 | |
d093f8e5 | 2823 | if (!sx.lmtp) |
e97957bc | 2824 | { |
d093f8e5 JH |
2825 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
2826 | sx.ob->final_timeout); | |
2827 | if (!sx.ok && errno == 0 && sx.buffer[0] == '4') | |
e97957bc PH |
2828 | { |
2829 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 2830 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e97957bc PH |
2831 | } |
2832 | } | |
0756eb3c PH |
2833 | |
2834 | /* For LMTP, we get back a response for every RCPT command that we sent; | |
2835 | some may be accepted and some rejected. For those that get a response, their | |
2836 | status is fixed; any that are accepted have been handed over, even if later | |
2837 | responses crash - at least, that's how I read RFC 2033. | |
2838 | ||
2839 | If all went well, mark the recipient addresses as completed, record which | |
2840 | host/IPaddress they were delivered to, and cut out RSET when sending another | |
2841 | message down the same channel. Write the completed addresses to the journal | |
2842 | now so that they are recorded in case there is a crash of hardware or | |
2843 | software before the spool gets updated. Also record the final SMTP | |
2844 | confirmation if needed (for SMTP only). */ | |
2845 | ||
d093f8e5 | 2846 | if (sx.ok) |
0756eb3c PH |
2847 | { |
2848 | int flag = '='; | |
2849 | int delivery_time = (int)(time(NULL) - start_delivery_time); | |
2850 | int len; | |
0756eb3c | 2851 | uschar *conf = NULL; |
0d9fa8c0 | 2852 | |
d093f8e5 | 2853 | sx.send_rset = FALSE; |
0d9fa8c0 | 2854 | pipelining_active = FALSE; |
0756eb3c | 2855 | |
0756eb3c PH |
2856 | /* Set up confirmation if needed - applies only to SMTP */ |
2857 | ||
d68218c7 | 2858 | if ( |
0cbf2b82 | 2859 | #ifdef DISABLE_EVENT |
6c6d6e48 | 2860 | LOGGING(smtp_confirmation) && |
a7538db1 | 2861 | #endif |
d093f8e5 | 2862 | !sx.lmtp |
d68218c7 | 2863 | ) |
0756eb3c | 2864 | { |
d093f8e5 | 2865 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 2866 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
d093f8e5 | 2867 | conf = (s == sx.buffer)? (uschar *)string_copy(s) : US s; |
0756eb3c PH |
2868 | } |
2869 | ||
fd98a5c6 | 2870 | /* Process all transported addresses - for LMTP or PRDR, read a status for |
0756eb3c PH |
2871 | each one. */ |
2872 | ||
d9c3c8ed | 2873 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
0756eb3c PH |
2874 | { |
2875 | if (addr->transport_return != PENDING_OK) continue; | |
2876 | ||
2877 | /* LMTP - if the response fails badly (e.g. timeout), use it for all the | |
2878 | remaining addresses. Otherwise, it's a return code for just the one | |
75def545 PH |
2879 | address. For temporary errors, add a retry item for the address so that |
2880 | it doesn't get tried again too soon. */ | |
0756eb3c | 2881 | |
8ccd00b1 | 2882 | #ifndef DISABLE_PRDR |
d093f8e5 | 2883 | if (sx.lmtp || sx.prdr_active) |
fd98a5c6 | 2884 | #else |
d093f8e5 | 2885 | if (sx.lmtp) |
fd98a5c6 | 2886 | #endif |
0756eb3c | 2887 | { |
d093f8e5 JH |
2888 | if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
2889 | sx.ob->final_timeout)) | |
0756eb3c | 2890 | { |
d093f8e5 | 2891 | if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED; |
fd98a5c6 | 2892 | addr->message = string_sprintf( |
8ccd00b1 | 2893 | #ifndef DISABLE_PRDR |
d093f8e5 | 2894 | "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP", |
fd98a5c6 JH |
2895 | #else |
2896 | "LMTP error after %s: %s", | |
2897 | #endif | |
d093f8e5 | 2898 | data_command, string_printing(sx.buffer)); |
75def545 | 2899 | setflag(addr, af_pass_message); /* Allow message to go to user */ |
d093f8e5 | 2900 | if (sx.buffer[0] == '5') |
75def545 PH |
2901 | addr->transport_return = FAIL; |
2902 | else | |
2903 | { | |
e97957bc | 2904 | errno = ERRNO_DATA4XX; |
d093f8e5 | 2905 | addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
75def545 | 2906 | addr->transport_return = DEFER; |
8ccd00b1 | 2907 | #ifndef DISABLE_PRDR |
d093f8e5 | 2908 | if (!sx.prdr_active) |
fd98a5c6 JH |
2909 | #endif |
2910 | retry_add_item(addr, addr->address_retry_key, 0); | |
75def545 | 2911 | } |
0756eb3c PH |
2912 | continue; |
2913 | } | |
d9c3c8ed | 2914 | sx.completed_addr = TRUE; /* NOW we can set this flag */ |
6c6d6e48 | 2915 | if (LOGGING(smtp_confirmation)) |
c0ea85ab | 2916 | { |
d093f8e5 | 2917 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 2918 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
d093f8e5 | 2919 | conf = (s == sx.buffer) ? US string_copy(s) : US s; |
c0ea85ab | 2920 | } |
0756eb3c PH |
2921 | } |
2922 | ||
2923 | /* SMTP, or success return from LMTP for this address. Pass back the | |
2d280592 | 2924 | actual host that was used. */ |
0756eb3c PH |
2925 | |
2926 | addr->transport_return = OK; | |
2927 | addr->more_errno = delivery_time; | |
d427a7f9 | 2928 | addr->host_used = host; |
0756eb3c PH |
2929 | addr->special_action = flag; |
2930 | addr->message = conf; | |
8ccd00b1 | 2931 | #ifndef DISABLE_PRDR |
d093f8e5 | 2932 | if (sx.prdr_active) addr->flags |= af_prdr_used; |
fd98a5c6 | 2933 | #endif |
d093f8e5 | 2934 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) addr->flags |= af_chunking_used; |
0756eb3c PH |
2935 | flag = '-'; |
2936 | ||
8ccd00b1 | 2937 | #ifndef DISABLE_PRDR |
d093f8e5 | 2938 | if (!sx.prdr_active) |
fd98a5c6 JH |
2939 | #endif |
2940 | { | |
2941 | /* Update the journal. For homonymic addresses, use the base address plus | |
2942 | the transport name. See lots of comments in deliver.c about the reasons | |
2943 | for the complications when homonyms are involved. Just carry on after | |
2944 | write error, as it may prove possible to update the spool file later. */ | |
4d8d62b9 | 2945 | |
fd98a5c6 | 2946 | if (testflag(addr, af_homonym)) |
d093f8e5 | 2947 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); |
fd98a5c6 | 2948 | else |
d093f8e5 | 2949 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); |
4d8d62b9 | 2950 | |
d093f8e5 JH |
2951 | DEBUG(D_deliver) debug_printf("journalling %s\n", sx.buffer); |
2952 | len = Ustrlen(CS sx.buffer); | |
2953 | if (write(journal_fd, sx.buffer, len) != len) | |
fd98a5c6 | 2954 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " |
d093f8e5 | 2955 | "%s: %s", sx.buffer, strerror(errno)); |
fd98a5c6 | 2956 | } |
0756eb3c PH |
2957 | } |
2958 | ||
8ccd00b1 | 2959 | #ifndef DISABLE_PRDR |
d093f8e5 | 2960 | if (sx.prdr_active) |
fd98a5c6 JH |
2961 | { |
2962 | /* PRDR - get the final, overall response. For any non-success | |
2963 | upgrade all the address statuses. */ | |
d093f8e5 JH |
2964 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
2965 | sx.ob->final_timeout); | |
2966 | if (!sx.ok) | |
fd98a5c6 | 2967 | { |
d093f8e5 | 2968 | if(errno == 0 && sx.buffer[0] == '4') |
fd98a5c6 JH |
2969 | { |
2970 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 2971 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
fd98a5c6 | 2972 | } |
d9c3c8ed | 2973 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
d093f8e5 | 2974 | if (sx.buffer[0] == '5' || addr->transport_return == OK) |
fd98a5c6 JH |
2975 | addr->transport_return = PENDING_OK; /* allow set_errno action */ |
2976 | goto RESPONSE_FAILED; | |
2977 | } | |
2978 | ||
2979 | /* Update the journal, or setup retry. */ | |
d9c3c8ed | 2980 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
fd98a5c6 | 2981 | if (addr->transport_return == OK) |
9be4572b JH |
2982 | { |
2983 | if (testflag(addr, af_homonym)) | |
2984 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); | |
2985 | else | |
2986 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); | |
2987 | ||
2988 | DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer); | |
2989 | len = Ustrlen(CS sx.buffer); | |
2990 | if (write(journal_fd, sx.buffer, len) != len) | |
2991 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " | |
2992 | "%s: %s", sx.buffer, strerror(errno)); | |
2993 | } | |
2994 | else if (addr->transport_return == DEFER) | |
2995 | retry_add_item(addr, addr->address_retry_key, -2); | |
fd98a5c6 JH |
2996 | } |
2997 | #endif | |
2998 | ||
0756eb3c PH |
2999 | /* Ensure the journal file is pushed out to disk. */ |
3000 | ||
54fc8428 | 3001 | if (EXIMfsync(journal_fd) < 0) |
0756eb3c PH |
3002 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", |
3003 | strerror(errno)); | |
3004 | } | |
3005 | } | |
3006 | ||
3007 | ||
3008 | /* Handle general (not specific to one address) failures here. The value of ok | |
3009 | is used to skip over this code on the falling through case. A timeout causes a | |
3010 | deferral. Other errors may defer or fail according to the response code, and | |
3011 | may set up a special errno value, e.g. after connection chopped, which is | |
3012 | assumed if errno == 0 and there is no text in the buffer. If control reaches | |
3013 | here during the setting up phase (i.e. before MAIL FROM) then always defer, as | |
3014 | the problem is not related to this specific message. */ | |
3015 | ||
d093f8e5 | 3016 | if (!sx.ok) |
0756eb3c | 3017 | { |
895fbaf2 JH |
3018 | int code, set_rc; |
3019 | uschar * set_message; | |
0756eb3c PH |
3020 | |
3021 | RESPONSE_FAILED: | |
895fbaf2 JH |
3022 | { |
3023 | save_errno = errno; | |
3024 | message = NULL; | |
d093f8e5 JH |
3025 | sx.send_quit = check_response(host, &save_errno, addrlist->more_errno, |
3026 | sx.buffer, &code, &message, &pass_message); | |
895fbaf2 JH |
3027 | goto FAILED; |
3028 | } | |
0756eb3c PH |
3029 | |
3030 | SEND_FAILED: | |
895fbaf2 JH |
3031 | { |
3032 | save_errno = errno; | |
3033 | code = '4'; | |
3034 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
3035 | host->name, host->address, strerror(save_errno)); | |
d093f8e5 | 3036 | sx.send_quit = FALSE; |
895fbaf2 JH |
3037 | goto FAILED; |
3038 | } | |
0756eb3c | 3039 | |
0756eb3c | 3040 | FAILED: |
9be4572b JH |
3041 | { |
3042 | BOOL message_error; | |
0756eb3c | 3043 | |
9be4572b JH |
3044 | sx.ok = FALSE; /* For when reached by GOTO */ |
3045 | set_message = message; | |
0756eb3c | 3046 | |
e97957bc | 3047 | /* We want to handle timeouts after MAIL or "." and loss of connection after |
0756eb3c | 3048 | "." specially. They can indicate a problem with the sender address or with |
e97957bc PH |
3049 | the contents of the message rather than a real error on the connection. These |
3050 | cases are treated in the same way as a 4xx response. This next bit of code | |
3051 | does the classification. */ | |
0756eb3c | 3052 | |
e97957bc PH |
3053 | switch(save_errno) |
3054 | { | |
3055 | case 0: | |
3056 | case ERRNO_MAIL4XX: | |
3057 | case ERRNO_DATA4XX: | |
250b6871 JH |
3058 | message_error = TRUE; |
3059 | break; | |
0756eb3c | 3060 | |
e97957bc | 3061 | case ETIMEDOUT: |
250b6871 JH |
3062 | message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 || |
3063 | Ustrncmp(smtp_command,"end ",4) == 0; | |
3064 | break; | |
e97957bc PH |
3065 | |
3066 | case ERRNO_SMTPCLOSED: | |
250b6871 JH |
3067 | message_error = Ustrncmp(smtp_command,"end ",4) == 0; |
3068 | break; | |
e97957bc PH |
3069 | |
3070 | default: | |
250b6871 JH |
3071 | message_error = FALSE; |
3072 | break; | |
e97957bc | 3073 | } |
0756eb3c | 3074 | |
e97957bc | 3075 | /* Handle the cases that are treated as message errors. These are: |
0756eb3c | 3076 | |
e97957bc PH |
3077 | (a) negative response or timeout after MAIL |
3078 | (b) negative response after DATA | |
3079 | (c) negative response or timeout or dropped connection after "." | |
250b6871 | 3080 | (d) utf8 support required and not offered |
0756eb3c | 3081 | |
e97957bc PH |
3082 | It won't be a negative response or timeout after RCPT, as that is dealt |
3083 | with separately above. The action in all cases is to set an appropriate | |
3084 | error code for all the addresses, but to leave yield set to OK because the | |
3085 | host itself has not failed. Of course, it might in practice have failed | |
3086 | when we've had a timeout, but if so, we'll discover that at the next | |
3087 | delivery attempt. For a temporary error, set the message_defer flag, and | |
3088 | write to the logs for information if this is not the last host. The error | |
3089 | for the last host will be logged as part of the address's log line. */ | |
3090 | ||
3091 | if (message_error) | |
0756eb3c | 3092 | { |
e97957bc | 3093 | if (mua_wrapper) code = '5'; /* Force hard failure in wrapper mode */ |
e97957bc PH |
3094 | |
3095 | /* If there's an errno, the message contains just the identity of | |
3096 | the host. */ | |
3097 | ||
895fbaf2 JH |
3098 | if (code == '5') |
3099 | set_rc = FAIL; | |
3100 | else /* Anything other than 5 is treated as temporary */ | |
e97957bc | 3101 | { |
895fbaf2 | 3102 | set_rc = DEFER; |
e97957bc PH |
3103 | if (save_errno > 0) |
3104 | message = US string_sprintf("%s: %s", message, strerror(save_errno)); | |
3105 | if (host->next != NULL) log_write(0, LOG_MAIN, "%s", message); | |
c562fd30 | 3106 | msglog_line(host, message); |
e97957bc PH |
3107 | *message_defer = TRUE; |
3108 | } | |
3109 | } | |
3110 | ||
3111 | /* Otherwise, we have an I/O error or a timeout other than after MAIL or | |
3112 | ".", or some other transportation error. We defer all addresses and yield | |
3113 | DEFER, except for the case of failed add_headers expansion, or a transport | |
3114 | filter failure, when the yield should be ERROR, to stop it trying other | |
3115 | hosts. */ | |
3116 | ||
3117 | else | |
3118 | { | |
895fbaf2 | 3119 | set_rc = DEFER; |
e97957bc PH |
3120 | yield = (save_errno == ERRNO_CHHEADER_FAIL || |
3121 | save_errno == ERRNO_FILTER_FAIL)? ERROR : DEFER; | |
0756eb3c PH |
3122 | } |
3123 | } | |
895fbaf2 JH |
3124 | |
3125 | set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host | |
3126 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 3127 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3128 | #endif |
3129 | ); | |
0756eb3c PH |
3130 | } |
3131 | ||
3132 | ||
3133 | /* If all has gone well, send_quit will be set TRUE, implying we can end the | |
3134 | SMTP session tidily. However, if there were too many addresses to send in one | |
3135 | message (indicated by first_addr being non-NULL) we want to carry on with the | |
3136 | rest of them. Also, it is desirable to send more than one message down the SMTP | |
3137 | connection if there are several waiting, provided we haven't already sent so | |
3138 | many as to hit the configured limit. The function transport_check_waiting looks | |
3139 | for a waiting message and returns its id. Then transport_pass_socket tries to | |
3140 | set up a continued delivery by passing the socket on to another process. The | |
3141 | variable send_rset is FALSE if a message has just been successfully transfered. | |
3142 | ||
3143 | If we are already sending down a continued channel, there may be further | |
3144 | addresses not yet delivered that are aimed at the same host, but which have not | |
3145 | been passed in this run of the transport. In this case, continue_more will be | |
3146 | true, and all we should do is send RSET if necessary, and return, leaving the | |
3147 | channel open. | |
3148 | ||
3149 | However, if no address was disposed of, i.e. all addresses got 4xx errors, we | |
3150 | do not want to continue with other messages down the same channel, because that | |
3151 | can lead to looping between two or more messages, all with the same, | |
3152 | temporarily failing address(es). [The retry information isn't updated yet, so | |
3153 | new processes keep on trying.] We probably also don't want to try more of this | |
3154 | message's addresses either. | |
3155 | ||
3156 | If we have started a TLS session, we have to end it before passing the | |
3157 | connection to a new process. However, not all servers can handle this (Exim | |
3158 | can), so we do not pass such a connection on if the host matches | |
3159 | hosts_nopass_tls. */ | |
3160 | ||
3161 | DEBUG(D_transport) | |
3162 | debug_printf("ok=%d send_quit=%d send_rset=%d continue_more=%d " | |
d093f8e5 | 3163 | "yield=%d first_address is %sNULL\n", sx.ok, sx.send_quit, |
d9c3c8ed | 3164 | sx.send_rset, continue_more, yield, sx.first_addr ? "not " : ""); |
0756eb3c | 3165 | |
d9c3c8ed | 3166 | if (sx.completed_addr && sx.ok && sx.send_quit) |
0756eb3c PH |
3167 | { |
3168 | BOOL more; | |
a39bd74d JB |
3169 | smtp_compare_t t_compare; |
3170 | ||
3171 | t_compare.tblock = tblock; | |
3172 | t_compare.current_sender_address = sender_address; | |
3173 | ||
d9c3c8ed | 3174 | if ( sx.first_addr != NULL |
5130845b JH |
3175 | || continue_more |
3176 | || ( ( tls_out.active < 0 | |
d093f8e5 | 3177 | || verify_check_given_host(&sx.ob->hosts_nopass_tls, host) != OK |
5130845b | 3178 | ) |
0756eb3c PH |
3179 | && |
3180 | transport_check_waiting(tblock->name, host->name, | |
a39bd74d JB |
3181 | tblock->connection_max_messages, new_message_id, &more, |
3182 | (oicf)smtp_are_same_identities, (void*)&t_compare) | |
5130845b | 3183 | ) ) |
0756eb3c PH |
3184 | { |
3185 | uschar *msg; | |
447d236c | 3186 | BOOL pass_message; |
0756eb3c | 3187 | |
d093f8e5 JH |
3188 | if (sx.send_rset) |
3189 | if (! (sx.ok = smtp_write_command(&sx.outblock, FALSE, "RSET\r\n") >= 0)) | |
0756eb3c PH |
3190 | { |
3191 | msg = US string_sprintf("send() to %s [%s] failed: %s", host->name, | |
3192 | host->address, strerror(save_errno)); | |
d093f8e5 | 3193 | sx.send_quit = FALSE; |
0756eb3c | 3194 | } |
d093f8e5 JH |
3195 | else if (! (sx.ok = smtp_read_response(&sx.inblock, sx.buffer, |
3196 | sizeof(sx.buffer), '2', sx.ob->command_timeout))) | |
0756eb3c PH |
3197 | { |
3198 | int code; | |
d093f8e5 | 3199 | sx.send_quit = check_response(host, &errno, 0, sx.buffer, &code, &msg, |
447d236c | 3200 | &pass_message); |
d093f8e5 | 3201 | if (!sx.send_quit) |
0756eb3c | 3202 | { |
c562fd30 JH |
3203 | DEBUG(D_transport) debug_printf("H=%s [%s] %s\n", |
3204 | host->name, host->address, msg); | |
0756eb3c PH |
3205 | } |
3206 | } | |
0756eb3c PH |
3207 | |
3208 | /* Either RSET was not needed, or it succeeded */ | |
3209 | ||
d093f8e5 | 3210 | if (sx.ok) |
0756eb3c | 3211 | { |
d9c3c8ed | 3212 | if (sx.first_addr != NULL) /* More addresses still to be sent */ |
0756eb3c PH |
3213 | { /* in this run of the transport */ |
3214 | continue_sequence++; /* Causes * in logging */ | |
3215 | goto SEND_MESSAGE; | |
3216 | } | |
3217 | if (continue_more) return yield; /* More addresses for another run */ | |
3218 | ||
3219 | /* Pass the socket to a new Exim process. Before doing so, we must shut | |
3220 | down TLS. Not all MTAs allow for the continuation of the SMTP session | |
3221 | when TLS is shut down. We test for this by sending a new EHLO. If we | |
3222 | don't get a good response, we don't attempt to pass the socket on. */ | |
3223 | ||
a7538db1 | 3224 | #ifdef SUPPORT_TLS |
817d9f57 | 3225 | if (tls_out.active >= 0) |
0756eb3c | 3226 | { |
817d9f57 | 3227 | tls_close(FALSE, TRUE); |
2d14f397 | 3228 | smtp_peer_options = smtp_peer_options_wrap; |
d093f8e5 JH |
3229 | sx.ok = !sx.smtps |
3230 | && smtp_write_command(&sx.outblock, FALSE, | |
3231 | "EHLO %s\r\n", sx.helo_data) >= 0 | |
3232 | && smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), | |
3233 | '2', sx.ob->command_timeout); | |
0756eb3c | 3234 | } |
a7538db1 | 3235 | #endif |
0756eb3c | 3236 | |
4c04137d | 3237 | /* If the socket is successfully passed, we mustn't send QUIT (or |
0756eb3c PH |
3238 | indeed anything!) from here. */ |
3239 | ||
895fbaf2 JH |
3240 | /*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to |
3241 | propagate it from the initial | |
3242 | */ | |
d093f8e5 JH |
3243 | if (sx.ok && transport_pass_socket(tblock->name, host->name, |
3244 | host->address, new_message_id, sx.inblock.sock)) | |
3245 | sx.send_quit = FALSE; | |
0756eb3c PH |
3246 | } |
3247 | ||
3248 | /* If RSET failed and there are addresses left, they get deferred. */ | |
3249 | ||
d9c3c8ed | 3250 | else set_errno(sx.first_addr, errno, msg, DEFER, FALSE, host |
895fbaf2 | 3251 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 3252 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3253 | #endif |
3254 | ); | |
0756eb3c PH |
3255 | } |
3256 | } | |
3257 | ||
3258 | /* End off tidily with QUIT unless the connection has died or the socket has | |
3259 | been passed to another process. There has been discussion on the net about what | |
3260 | to do after sending QUIT. The wording of the RFC suggests that it is necessary | |
3261 | to wait for a response, but on the other hand, there isn't anything one can do | |
3262 | with an error response, other than log it. Exim used to do that. However, | |
3263 | further discussion suggested that it is positively advantageous not to wait for | |
3264 | the response, but to close the session immediately. This is supposed to move | |
3265 | the TCP/IP TIME_WAIT state from the server to the client, thereby removing some | |
3266 | load from the server. (Hosts that are both servers and clients may not see much | |
3267 | difference, of course.) Further discussion indicated that this was safe to do | |
3268 | on Unix systems which have decent implementations of TCP/IP that leave the | |
3269 | connection around for a while (TIME_WAIT) after the application has gone away. | |
3270 | This enables the response sent by the server to be properly ACKed rather than | |
3271 | timed out, as can happen on broken TCP/IP implementations on other OS. | |
3272 | ||
3273 | This change is being made on 31-Jul-98. After over a year of trouble-free | |
3274 | operation, the old commented-out code was removed on 17-Sep-99. */ | |
3275 | ||
3276 | SEND_QUIT: | |
d093f8e5 | 3277 | if (sx.send_quit) (void)smtp_write_command(&sx.outblock, FALSE, "QUIT\r\n"); |
0756eb3c PH |
3278 | |
3279 | END_OFF: | |
3280 | ||
3281 | #ifdef SUPPORT_TLS | |
817d9f57 | 3282 | tls_close(FALSE, TRUE); |
0756eb3c PH |
3283 | #endif |
3284 | ||
3285 | /* Close the socket, and return the appropriate value, first setting | |
0756eb3c PH |
3286 | works because the NULL setting is passed back to the calling process, and |
3287 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
3288 | ||
3289 | If all went well and continue_more is set, we shouldn't actually get here if | |
3290 | there are further addresses, as the return above will be taken. However, | |
3291 | writing RSET might have failed, or there may be other addresses whose hosts are | |
3292 | specified in the transports, and therefore not visible at top level, in which | |
3293 | case continue_more won't get set. */ | |
3294 | ||
b9d9c5a2 | 3295 | HDEBUG(D_transport|D_acl|D_v) debug_printf(" SMTP(close)>>\n"); |
d093f8e5 | 3296 | if (sx.send_quit) |
60d10ce7 | 3297 | { |
d093f8e5 JH |
3298 | shutdown(sx.outblock.sock, SHUT_WR); |
3299 | if (fcntl(sx.inblock.sock, F_SETFL, O_NONBLOCK) == 0) | |
3300 | for (rc = 16; read(sx.inblock.sock, sx.inbuffer, sizeof(sx.inbuffer)) > 0 && rc > 0;) | |
5ddc9771 | 3301 | rc--; /* drain socket */ |
60d10ce7 | 3302 | } |
d093f8e5 | 3303 | (void)close(sx.inblock.sock); |
a7538db1 | 3304 | |
0cbf2b82 | 3305 | #ifndef DISABLE_EVENT |
774ef2d7 | 3306 | (void) event_raise(tblock->event_action, US"tcp:close", NULL); |
a7538db1 JH |
3307 | #endif |
3308 | ||
0756eb3c PH |
3309 | continue_transport = NULL; |
3310 | continue_hostname = NULL; | |
3311 | return yield; | |
3312 | } | |
3313 | ||
3314 | ||
3315 | ||
3316 | ||
3317 | /************************************************* | |
3318 | * Closedown entry point * | |
3319 | *************************************************/ | |
3320 | ||
3321 | /* This function is called when exim is passed an open smtp channel | |
3322 | from another incarnation, but the message which it has been asked | |
3323 | to deliver no longer exists. The channel is on stdin. | |
3324 | ||
3325 | We might do fancy things like looking for another message to send down | |
3326 | the channel, but if the one we sought has gone, it has probably been | |
3327 | delivered by some other process that itself will seek further messages, | |
3328 | so just close down our connection. | |
3329 | ||
3330 | Argument: pointer to the transport instance block | |
3331 | Returns: nothing | |
3332 | */ | |
3333 | ||
3334 | void | |
3335 | smtp_transport_closedown(transport_instance *tblock) | |
3336 | { | |
3337 | smtp_transport_options_block *ob = | |
02b41d71 | 3338 | (smtp_transport_options_block *)tblock->options_block; |
0756eb3c PH |
3339 | smtp_inblock inblock; |
3340 | smtp_outblock outblock; | |
3341 | uschar buffer[256]; | |
3342 | uschar inbuffer[4096]; | |
3343 | uschar outbuffer[16]; | |
3344 | ||
3345 | inblock.sock = fileno(stdin); | |
3346 | inblock.buffer = inbuffer; | |
3347 | inblock.buffersize = sizeof(inbuffer); | |
3348 | inblock.ptr = inbuffer; | |
3349 | inblock.ptrend = inbuffer; | |
3350 | ||
3351 | outblock.sock = inblock.sock; | |
3352 | outblock.buffersize = sizeof(outbuffer); | |
3353 | outblock.buffer = outbuffer; | |
3354 | outblock.ptr = outbuffer; | |
3355 | outblock.cmd_count = 0; | |
3356 | outblock.authenticating = FALSE; | |
3357 | ||
3358 | (void)smtp_write_command(&outblock, FALSE, "QUIT\r\n"); | |
3359 | (void)smtp_read_response(&inblock, buffer, sizeof(buffer), '2', | |
3360 | ob->command_timeout); | |
f1e894f3 | 3361 | (void)close(inblock.sock); |
0756eb3c PH |
3362 | } |
3363 | ||
3364 | ||
3365 | ||
3366 | /************************************************* | |
3367 | * Prepare addresses for delivery * | |
3368 | *************************************************/ | |
3369 | ||
3370 | /* This function is called to flush out error settings from previous delivery | |
3371 | attempts to other hosts. It also records whether we got here via an MX record | |
3372 | or not in the more_errno field of the address. We are interested only in | |
3373 | addresses that are still marked DEFER - others may have got delivered to a | |
3374 | previously considered IP address. Set their status to PENDING_DEFER to indicate | |
3375 | which ones are relevant this time. | |
3376 | ||
3377 | Arguments: | |
3378 | addrlist the list of addresses | |
3379 | host the host we are delivering to | |
3380 | ||
3381 | Returns: the first address for this delivery | |
3382 | */ | |
3383 | ||
3384 | static address_item * | |
3385 | prepare_addresses(address_item *addrlist, host_item *host) | |
3386 | { | |
3387 | address_item *first_addr = NULL; | |
3388 | address_item *addr; | |
7b4c8c1f | 3389 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b JH |
3390 | if (addr->transport_return == DEFER) |
3391 | { | |
7b4c8c1f | 3392 | if (!first_addr) first_addr = addr; |
168dec3b JH |
3393 | addr->transport_return = PENDING_DEFER; |
3394 | addr->basic_errno = 0; | |
3395 | addr->more_errno = (host->mx >= 0)? 'M' : 'A'; | |
3396 | addr->message = NULL; | |
a7538db1 | 3397 | #ifdef SUPPORT_TLS |
168dec3b JH |
3398 | addr->cipher = NULL; |
3399 | addr->ourcert = NULL; | |
3400 | addr->peercert = NULL; | |
3401 | addr->peerdn = NULL; | |
3402 | addr->ocsp = OCSP_NOT_REQ; | |
895fbaf2 JH |
3403 | #endif |
3404 | #ifdef EXPERIMENTAL_DSN_INFO | |
3405 | addr->smtp_greeting = NULL; | |
3406 | addr->helo_response = NULL; | |
a7538db1 | 3407 | #endif |
168dec3b | 3408 | } |
0756eb3c PH |
3409 | return first_addr; |
3410 | } | |
3411 | ||
3412 | ||
3413 | ||
3414 | /************************************************* | |
3415 | * Main entry point * | |
3416 | *************************************************/ | |
3417 | ||
3418 | /* See local README for interface details. As this is a remote transport, it is | |
3419 | given a chain of addresses to be delivered in one connection, if possible. It | |
3420 | always returns TRUE, indicating that each address has its own independent | |
3421 | status set, except if there is a setting up problem, in which case it returns | |
3422 | FALSE. */ | |
3423 | ||
3424 | BOOL | |
3425 | smtp_transport_entry( | |
3426 | transport_instance *tblock, /* data for this instantiation */ | |
3427 | address_item *addrlist) /* addresses we are working on */ | |
3428 | { | |
3429 | int cutoff_retry; | |
3430 | int port; | |
3431 | int hosts_defer = 0; | |
3432 | int hosts_fail = 0; | |
3433 | int hosts_looked_up = 0; | |
3434 | int hosts_retry = 0; | |
3435 | int hosts_serial = 0; | |
3436 | int hosts_total = 0; | |
8e669ac1 | 3437 | int total_hosts_tried = 0; |
0756eb3c PH |
3438 | address_item *addr; |
3439 | BOOL expired = TRUE; | |
0756eb3c PH |
3440 | uschar *expanded_hosts = NULL; |
3441 | uschar *pistring; | |
3442 | uschar *tid = string_sprintf("%s transport", tblock->name); | |
3443 | smtp_transport_options_block *ob = | |
3444 | (smtp_transport_options_block *)(tblock->options_block); | |
3445 | host_item *hostlist = addrlist->host_list; | |
3446 | host_item *host = NULL; | |
3447 | ||
3448 | DEBUG(D_transport) | |
3449 | { | |
3450 | debug_printf("%s transport entered\n", tblock->name); | |
7b4c8c1f | 3451 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c | 3452 | debug_printf(" %s\n", addr->address); |
7b4c8c1f JH |
3453 | if (hostlist) |
3454 | { | |
3455 | debug_printf("hostlist:\n"); | |
3456 | for (host = hostlist; host; host = host->next) | |
3457 | debug_printf(" %s:%d\n", host->name, host->port); | |
3458 | } | |
3459 | if (continue_hostname) debug_printf("already connected to %s [%s]\n", | |
0756eb3c PH |
3460 | continue_hostname, continue_host_address); |
3461 | } | |
3462 | ||
f6c332bd PH |
3463 | /* Set the flag requesting that these hosts be added to the waiting |
3464 | database if the delivery fails temporarily or if we are running with | |
3465 | queue_smtp or a 2-stage queue run. This gets unset for certain | |
3466 | kinds of error, typically those that are specific to the message. */ | |
3467 | ||
3468 | update_waiting = TRUE; | |
3469 | ||
0756eb3c PH |
3470 | /* If a host list is not defined for the addresses - they must all have the |
3471 | same one in order to be passed to a single transport - or if the transport has | |
3472 | a host list with hosts_override set, use the host list supplied with the | |
3473 | transport. It is an error for this not to exist. */ | |
3474 | ||
7b4c8c1f | 3475 | if (!hostlist || (ob->hosts_override && ob->hosts)) |
0756eb3c | 3476 | { |
7b4c8c1f | 3477 | if (!ob->hosts) |
0756eb3c PH |
3478 | { |
3479 | addrlist->message = string_sprintf("%s transport called with no hosts set", | |
3480 | tblock->name); | |
3481 | addrlist->transport_return = PANIC; | |
3482 | return FALSE; /* Only top address has status */ | |
3483 | } | |
3484 | ||
3485 | DEBUG(D_transport) debug_printf("using the transport's hosts: %s\n", | |
3486 | ob->hosts); | |
3487 | ||
3488 | /* If the transport's host list contains no '$' characters, and we are not | |
3489 | randomizing, it is fixed and therefore a chain of hosts can be built once | |
3490 | and for all, and remembered for subsequent use by other calls to this | |
3491 | transport. If, on the other hand, the host list does contain '$', or we are | |
3492 | randomizing its order, we have to rebuild it each time. In the fixed case, | |
3493 | as the hosts string will never be used again, it doesn't matter that we | |
3494 | replace all the : characters with zeros. */ | |
3495 | ||
7b4c8c1f | 3496 | if (!ob->hostlist) |
0756eb3c PH |
3497 | { |
3498 | uschar *s = ob->hosts; | |
3499 | ||
3500 | if (Ustrchr(s, '$') != NULL) | |
3501 | { | |
d427a7f9 | 3502 | if (!(expanded_hosts = expand_string(s))) |
0756eb3c PH |
3503 | { |
3504 | addrlist->message = string_sprintf("failed to expand list of hosts " | |
3505 | "\"%s\" in %s transport: %s", s, tblock->name, expand_string_message); | |
7b4c8c1f | 3506 | addrlist->transport_return = search_find_defer ? DEFER : PANIC; |
0756eb3c PH |
3507 | return FALSE; /* Only top address has status */ |
3508 | } | |
3509 | DEBUG(D_transport) debug_printf("expanded list of hosts \"%s\" to " | |
3510 | "\"%s\"\n", s, expanded_hosts); | |
3511 | s = expanded_hosts; | |
3512 | } | |
3513 | else | |
3514 | if (ob->hosts_randomize) s = expanded_hosts = string_copy(s); | |
3515 | ||
3516 | host_build_hostlist(&hostlist, s, ob->hosts_randomize); | |
3517 | ||
e276e04b | 3518 | /* Check that the expansion yielded something useful. */ |
7b4c8c1f | 3519 | if (!hostlist) |
e276e04b TF |
3520 | { |
3521 | addrlist->message = | |
3522 | string_sprintf("%s transport has empty hosts setting", tblock->name); | |
3523 | addrlist->transport_return = PANIC; | |
3524 | return FALSE; /* Only top address has status */ | |
3525 | } | |
3526 | ||
0756eb3c PH |
3527 | /* If there was no expansion of hosts, save the host list for |
3528 | next time. */ | |
3529 | ||
d427a7f9 | 3530 | if (!expanded_hosts) ob->hostlist = hostlist; |
0756eb3c PH |
3531 | } |
3532 | ||
3533 | /* This is not the first time this transport has been run in this delivery; | |
3534 | the host list was built previously. */ | |
3535 | ||
55414b25 JH |
3536 | else |
3537 | hostlist = ob->hostlist; | |
0756eb3c PH |
3538 | } |
3539 | ||
3540 | /* The host list was supplied with the address. If hosts_randomize is set, we | |
3541 | must sort it into a random order if it did not come from MX records and has not | |
3542 | already been randomized (but don't bother if continuing down an existing | |
3543 | connection). */ | |
3544 | ||
7b4c8c1f | 3545 | else if (ob->hosts_randomize && hostlist->mx == MX_NONE && !continue_hostname) |
0756eb3c PH |
3546 | { |
3547 | host_item *newlist = NULL; | |
7b4c8c1f | 3548 | while (hostlist) |
0756eb3c PH |
3549 | { |
3550 | host_item *h = hostlist; | |
3551 | hostlist = hostlist->next; | |
3552 | ||
3553 | h->sort_key = random_number(100); | |
3554 | ||
7b4c8c1f | 3555 | if (!newlist) |
0756eb3c PH |
3556 | { |
3557 | h->next = NULL; | |
3558 | newlist = h; | |
3559 | } | |
3560 | else if (h->sort_key < newlist->sort_key) | |
3561 | { | |
3562 | h->next = newlist; | |
3563 | newlist = h; | |
3564 | } | |
3565 | else | |
3566 | { | |
3567 | host_item *hh = newlist; | |
7b4c8c1f | 3568 | while (hh->next) |
0756eb3c PH |
3569 | { |
3570 | if (h->sort_key < hh->next->sort_key) break; | |
3571 | hh = hh->next; | |
3572 | } | |
3573 | h->next = hh->next; | |
3574 | hh->next = h; | |
3575 | } | |
3576 | } | |
3577 | ||
3578 | hostlist = addrlist->host_list = newlist; | |
3579 | } | |
3580 | ||
2d280592 | 3581 | /* Sort out the default port. */ |
0756eb3c PH |
3582 | |
3583 | if (!smtp_get_port(ob->port, addrlist, &port, tid)) return FALSE; | |
0756eb3c | 3584 | |
0756eb3c PH |
3585 | /* For each host-plus-IP-address on the list: |
3586 | ||
3587 | . If this is a continued delivery and the host isn't the one with the | |
3588 | current connection, skip. | |
3589 | ||
3590 | . If the status is unusable (i.e. previously failed or retry checked), skip. | |
3591 | ||
3592 | . If no IP address set, get the address, either by turning the name into | |
3593 | an address, calling gethostbyname if gethostbyname is on, or by calling | |
3594 | the DNS. The DNS may yield multiple addresses, in which case insert the | |
3595 | extra ones into the list. | |
3596 | ||
3597 | . Get the retry data if not previously obtained for this address and set the | |
3598 | field which remembers the state of this address. Skip if the retry time is | |
3599 | not reached. If not, remember whether retry data was found. The retry string | |
3600 | contains both the name and the IP address. | |
3601 | ||
3602 | . Scan the list of addresses and mark those whose status is DEFER as | |
3603 | PENDING_DEFER. These are the only ones that will be processed in this cycle | |
3604 | of the hosts loop. | |
3605 | ||
3606 | . Make a delivery attempt - addresses marked PENDING_DEFER will be tried. | |
3607 | Some addresses may be successfully delivered, others may fail, and yet | |
3608 | others may get temporary errors and so get marked DEFER. | |
3609 | ||
3610 | . The return from the delivery attempt is OK if a connection was made and a | |
3611 | valid SMTP dialogue was completed. Otherwise it is DEFER. | |
3612 | ||
3613 | . If OK, add a "remove" retry item for this host/IPaddress, if any. | |
3614 | ||
3615 | . If fail to connect, or other defer state, add a retry item. | |
3616 | ||
3617 | . If there are any addresses whose status is still DEFER, carry on to the | |
3618 | next host/IPaddress, unless we have tried the number of hosts given | |
533244af | 3619 | by hosts_max_try or hosts_max_try_hardlimit; otherwise return. Note that |
8e669ac1 PH |
3620 | there is some fancy logic for hosts_max_try that means its limit can be |
3621 | overstepped in some circumstances. | |
0756eb3c PH |
3622 | |
3623 | If we get to the end of the list, all hosts have deferred at least one address, | |
3624 | or not reached their retry times. If delay_after_cutoff is unset, it requests a | |
3625 | delivery attempt to those hosts whose last try was before the arrival time of | |
3626 | the current message. To cope with this, we have to go round the loop a second | |
3627 | time. After that, set the status and error data for any addresses that haven't | |
3628 | had it set already. */ | |
3629 | ||
7b4c8c1f JH |
3630 | for (cutoff_retry = 0; |
3631 | expired && cutoff_retry < (ob->delay_after_cutoff ? 1 : 2); | |
0756eb3c PH |
3632 | cutoff_retry++) |
3633 | { | |
3634 | host_item *nexthost = NULL; | |
3635 | int unexpired_hosts_tried = 0; | |
3636 | ||
3637 | for (host = hostlist; | |
7b4c8c1f JH |
3638 | host |
3639 | && unexpired_hosts_tried < ob->hosts_max_try | |
3640 | && total_hosts_tried < ob->hosts_max_try_hardlimit; | |
0756eb3c PH |
3641 | host = nexthost) |
3642 | { | |
3643 | int rc; | |
3644 | int host_af; | |
3645 | uschar *rs; | |
0756eb3c PH |
3646 | BOOL host_is_expired = FALSE; |
3647 | BOOL message_defer = FALSE; | |
0756eb3c PH |
3648 | BOOL some_deferred = FALSE; |
3649 | address_item *first_addr = NULL; | |
3650 | uschar *interface = NULL; | |
3651 | uschar *retry_host_key = NULL; | |
3652 | uschar *retry_message_key = NULL; | |
3653 | uschar *serialize_key = NULL; | |
3654 | ||
9c4e8f60 PH |
3655 | /* Default next host is next host. :-) But this can vary if the |
3656 | hosts_max_try limit is hit (see below). It may also be reset if a host | |
3657 | address is looked up here (in case the host was multihomed). */ | |
3658 | ||
3659 | nexthost = host->next; | |
3660 | ||
0756eb3c PH |
3661 | /* If the address hasn't yet been obtained from the host name, look it up |
3662 | now, unless the host is already marked as unusable. If it is marked as | |
3663 | unusable, it means that the router was unable to find its IP address (in | |
3664 | the DNS or wherever) OR we are in the 2nd time round the cutoff loop, and | |
3665 | the lookup failed last time. We don't get this far if *all* MX records | |
3666 | point to non-existent hosts; that is treated as a hard error. | |
3667 | ||
3668 | We can just skip this host entirely. When the hosts came from the router, | |
3669 | the address will timeout based on the other host(s); when the address is | |
3670 | looked up below, there is an explicit retry record added. | |
3671 | ||
3672 | Note that we mustn't skip unusable hosts if the address is not unset; they | |
3673 | may be needed as expired hosts on the 2nd time round the cutoff loop. */ | |
3674 | ||
7b4c8c1f | 3675 | if (!host->address) |
0756eb3c | 3676 | { |
322050c2 | 3677 | int new_port, flags; |
7cd1141b | 3678 | host_item *hh; |
0756eb3c PH |
3679 | |
3680 | if (host->status >= hstatus_unusable) | |
3681 | { | |
3682 | DEBUG(D_transport) debug_printf("%s has no address and is unusable - skipping\n", | |
3683 | host->name); | |
3684 | continue; | |
3685 | } | |
3686 | ||
3687 | DEBUG(D_transport) debug_printf("getting address for %s\n", host->name); | |
3688 | ||
7cd1141b PH |
3689 | /* The host name is permitted to have an attached port. Find it, and |
3690 | strip it from the name. Just remember it for now. */ | |
3691 | ||
3692 | new_port = host_item_get_port(host); | |
3693 | ||
3694 | /* Count hosts looked up */ | |
3695 | ||
0756eb3c PH |
3696 | hosts_looked_up++; |
3697 | ||
3698 | /* Find by name if so configured, or if it's an IP address. We don't | |
3699 | just copy the IP address, because we need the test-for-local to happen. */ | |
3700 | ||
322050c2 PH |
3701 | flags = HOST_FIND_BY_A; |
3702 | if (ob->dns_qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE; | |
3703 | if (ob->dns_search_parents) flags |= HOST_FIND_SEARCH_PARENTS; | |
3704 | ||
7e66e54d | 3705 | if (ob->gethostbyname || string_is_ip_address(host->name, NULL) != 0) |
55414b25 | 3706 | rc = host_find_byname(host, NULL, flags, NULL, TRUE); |
0756eb3c | 3707 | else |
0756eb3c | 3708 | rc = host_find_bydns(host, NULL, flags, NULL, NULL, NULL, |
7cd171b7 | 3709 | &ob->dnssec, /* domains for request/require */ |
55414b25 | 3710 | NULL, NULL); |
0756eb3c | 3711 | |
7cd1141b PH |
3712 | /* Update the host (and any additional blocks, resulting from |
3713 | multihoming) with a host-specific port, if any. */ | |
3714 | ||
3715 | for (hh = host; hh != nexthost; hh = hh->next) hh->port = new_port; | |
3716 | ||
0756eb3c PH |
3717 | /* Failure to find the host at this time (usually DNS temporary failure) |
3718 | is really a kind of routing failure rather than a transport failure. | |
3719 | Therefore we add a retry item of the routing kind, not to stop us trying | |
3720 | to look this name up here again, but to ensure the address gets timed | |
3721 | out if the failures go on long enough. A complete failure at this point | |
3722 | commonly points to a configuration error, but the best action is still | |
3723 | to carry on for the next host. */ | |
3724 | ||
3725 | if (rc == HOST_FIND_AGAIN || rc == HOST_FIND_FAILED) | |
3726 | { | |
3727 | retry_add_item(addrlist, string_sprintf("R:%s", host->name), 0); | |
3728 | expired = FALSE; | |
3729 | if (rc == HOST_FIND_AGAIN) hosts_defer++; else hosts_fail++; | |
3730 | DEBUG(D_transport) debug_printf("rc = %s for %s\n", (rc == HOST_FIND_AGAIN)? | |
3731 | "HOST_FIND_AGAIN" : "HOST_FIND_FAILED", host->name); | |
3732 | host->status = hstatus_unusable; | |
3733 | ||
7b4c8c1f | 3734 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
3735 | { |
3736 | if (addr->transport_return != DEFER) continue; | |
3737 | addr->basic_errno = ERRNO_UNKNOWNHOST; | |
3738 | addr->message = | |
3739 | string_sprintf("failed to lookup IP address for %s", host->name); | |
3740 | } | |
3741 | continue; | |
3742 | } | |
3743 | ||
3744 | /* If the host is actually the local host, we may have a problem, or | |
3745 | there may be some cunning configuration going on. In the problem case, | |
3746 | log things and give up. The default transport status is already DEFER. */ | |
3747 | ||
3748 | if (rc == HOST_FOUND_LOCAL && !ob->allow_localhost) | |
3749 | { | |
7b4c8c1f | 3750 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
3751 | { |
3752 | addr->basic_errno = 0; | |
3753 | addr->message = string_sprintf("%s transport found host %s to be " | |
3754 | "local", tblock->name, host->name); | |
3755 | } | |
3756 | goto END_TRANSPORT; | |
3757 | } | |
3758 | } /* End of block for IP address lookup */ | |
3759 | ||
3760 | /* If this is a continued delivery, we are interested only in the host | |
3761 | which matches the name of the existing open channel. The check is put | |
3762 | here after the local host lookup, in case the name gets expanded as a | |
3763 | result of the lookup. Set expired FALSE, to save the outer loop executing | |
3764 | twice. */ | |
3765 | ||
7b4c8c1f JH |
3766 | if ( continue_hostname |
3767 | && ( Ustrcmp(continue_hostname, host->name) != 0 | |
3768 | || Ustrcmp(continue_host_address, host->address) != 0 | |
3769 | ) ) | |
0756eb3c PH |
3770 | { |
3771 | expired = FALSE; | |
3772 | continue; /* With next host */ | |
3773 | } | |
3774 | ||
9c4e8f60 PH |
3775 | /* Reset the default next host in case a multihomed host whose addresses |
3776 | are not looked up till just above added to the host list. */ | |
83364d30 PH |
3777 | |
3778 | nexthost = host->next; | |
3779 | ||
0756eb3c PH |
3780 | /* If queue_smtp is set (-odqs or the first part of a 2-stage run), or the |
3781 | domain is in queue_smtp_domains, we don't actually want to attempt any | |
3782 | deliveries. When doing a queue run, queue_smtp_domains is always unset. If | |
3783 | there is a lookup defer in queue_smtp_domains, proceed as if the domain | |
3784 | were not in it. We don't want to hold up all SMTP deliveries! Except when | |
3785 | doing a two-stage queue run, don't do this if forcing. */ | |
3786 | ||
3787 | if ((!deliver_force || queue_2stage) && (queue_smtp || | |
55414b25 JH |
3788 | match_isinlist(addrlist->domain, |
3789 | (const uschar **)&queue_smtp_domains, 0, | |
cf39cf57 | 3790 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)) |
0756eb3c PH |
3791 | { |
3792 | expired = FALSE; | |
7b4c8c1f JH |
3793 | for (addr = addrlist; addr; addr = addr->next) |
3794 | if (addr->transport_return == DEFER) | |
3795 | addr->message = US"domain matches queue_smtp_domains, or -odqs set"; | |
0756eb3c PH |
3796 | continue; /* With next host */ |
3797 | } | |
3798 | ||
3799 | /* Count hosts being considered - purely for an intelligent comment | |
3800 | if none are usable. */ | |
3801 | ||
3802 | hosts_total++; | |
3803 | ||
3804 | /* Set $host and $host address now in case they are needed for the | |
3805 | interface expansion or the serialize_hosts check; they remain set if an | |
3806 | actual delivery happens. */ | |
3807 | ||
3808 | deliver_host = host->name; | |
3809 | deliver_host_address = host->address; | |
783b385f JH |
3810 | lookup_dnssec_authenticated = host->dnssec == DS_YES ? US"yes" |
3811 | : host->dnssec == DS_NO ? US"no" | |
3812 | : US""; | |
0756eb3c | 3813 | |
7cd1141b PH |
3814 | /* Set up a string for adding to the retry key if the port number is not |
3815 | the standard SMTP port. A host may have its own port setting that overrides | |
3816 | the default. */ | |
3817 | ||
7b4c8c1f JH |
3818 | pistring = string_sprintf(":%d", host->port == PORT_NONE |
3819 | ? port : host->port); | |
7cd1141b PH |
3820 | if (Ustrcmp(pistring, ":25") == 0) pistring = US""; |
3821 | ||
0756eb3c | 3822 | /* Select IPv4 or IPv6, and choose an outgoing interface. If the interface |
6f6dedcc JH |
3823 | string is set, even if constant (as different transports can have different |
3824 | constant settings), we must add it to the key that is used for retries, | |
3825 | because connections to the same host from a different interface should be | |
3826 | treated separately. */ | |
0756eb3c | 3827 | |
7b4c8c1f | 3828 | host_af = Ustrchr(host->address, ':') == NULL ? AF_INET : AF_INET6; |
6f6dedcc JH |
3829 | if ((rs = ob->interface) && *rs) |
3830 | { | |
3831 | if (!smtp_get_interface(rs, host_af, addrlist, &interface, tid)) | |
3832 | return FALSE; | |
3833 | pistring = string_sprintf("%s/%s", pistring, interface); | |
3834 | } | |
0756eb3c PH |
3835 | |
3836 | /* The first time round the outer loop, check the status of the host by | |
3837 | inspecting the retry data. The second time round, we are interested only | |
3838 | in expired hosts that haven't been tried since this message arrived. */ | |
3839 | ||
3840 | if (cutoff_retry == 0) | |
3841 | { | |
9c695f6d | 3842 | BOOL incl_ip; |
0756eb3c | 3843 | /* Ensure the status of the address is set by checking retry data if |
9c695f6d | 3844 | necessary. There may be host-specific retry data (applicable to all |
0756eb3c PH |
3845 | messages) and also data for retries of a specific message at this host. |
3846 | If either of these retry records are actually read, the keys used are | |
3847 | returned to save recomputing them later. */ | |
3848 | ||
9c695f6d JH |
3849 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, |
3850 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
3851 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
3852 | continue; /* with next host */ | |
3853 | ||
0756eb3c | 3854 | host_is_expired = retry_check_address(addrlist->domain, host, pistring, |
9c695f6d | 3855 | incl_ip, &retry_host_key, &retry_message_key); |
0756eb3c PH |
3856 | |
3857 | DEBUG(D_transport) debug_printf("%s [%s]%s status = %s\n", host->name, | |
3858 | (host->address == NULL)? US"" : host->address, pistring, | |
3859 | (host->status == hstatus_usable)? "usable" : | |
3860 | (host->status == hstatus_unusable)? "unusable" : | |
3861 | (host->status == hstatus_unusable_expired)? "unusable (expired)" : "?"); | |
3862 | ||
3863 | /* Skip this address if not usable at this time, noting if it wasn't | |
3864 | actually expired, both locally and in the address. */ | |
3865 | ||
3866 | switch (host->status) | |
3867 | { | |
3868 | case hstatus_unusable: | |
7b4c8c1f JH |
3869 | expired = FALSE; |
3870 | setflag(addrlist, af_retry_skipped); | |
3871 | /* Fall through */ | |
0756eb3c PH |
3872 | |
3873 | case hstatus_unusable_expired: | |
7b4c8c1f JH |
3874 | switch (host->why) |
3875 | { | |
3876 | case hwhy_retry: hosts_retry++; break; | |
3877 | case hwhy_failed: hosts_fail++; break; | |
3878 | case hwhy_deferred: hosts_defer++; break; | |
3879 | } | |
3880 | ||
3881 | /* If there was a retry message key, implying that previously there | |
3882 | was a message-specific defer, we don't want to update the list of | |
3883 | messages waiting for these hosts. */ | |
3884 | ||
3885 | if (retry_message_key) update_waiting = FALSE; | |
3886 | continue; /* With the next host or IP address */ | |
0756eb3c PH |
3887 | } |
3888 | } | |
3889 | ||
3890 | /* Second time round the loop: if the address is set but expired, and | |
3891 | the message is newer than the last try, let it through. */ | |
3892 | ||
3893 | else | |
3894 | { | |
7b4c8c1f JH |
3895 | if ( !host->address |
3896 | || host->status != hstatus_unusable_expired | |
3897 | || host->last_try > received_time) | |
0756eb3c | 3898 | continue; |
7b4c8c1f | 3899 | DEBUG(D_transport) debug_printf("trying expired host %s [%s]%s\n", |
0756eb3c PH |
3900 | host->name, host->address, pistring); |
3901 | host_is_expired = TRUE; | |
3902 | } | |
3903 | ||
3904 | /* Setting "expired=FALSE" doesn't actually mean not all hosts are expired; | |
3905 | it remains TRUE only if all hosts are expired and none are actually tried. | |
3906 | */ | |
3907 | ||
3908 | expired = FALSE; | |
3909 | ||
3910 | /* If this host is listed as one to which access must be serialized, | |
3911 | see if another Exim process has a connection to it, and if so, skip | |
3912 | this host. If not, update the database to record our connection to it | |
3913 | and remember this for later deletion. Do not do any of this if we are | |
3914 | sending the message down a pre-existing connection. */ | |
3915 | ||
7b4c8c1f JH |
3916 | if ( !continue_hostname |
3917 | && verify_check_given_host(&ob->serialize_hosts, host) == OK) | |
0756eb3c PH |
3918 | { |
3919 | serialize_key = string_sprintf("host-serialize-%s", host->name); | |
e8ae7214 | 3920 | if (!enq_start(serialize_key, 1)) |
0756eb3c PH |
3921 | { |
3922 | DEBUG(D_transport) | |
3923 | debug_printf("skipping host %s because another Exim process " | |
3924 | "is connected to it\n", host->name); | |
3925 | hosts_serial++; | |
3926 | continue; | |
3927 | } | |
0756eb3c PH |
3928 | } |
3929 | ||
3930 | /* OK, we have an IP address that is not waiting for its retry time to | |
3931 | arrive (it might be expired) OR (second time round the loop) we have an | |
3932 | expired host that hasn't been tried since the message arrived. Have a go | |
3933 | at delivering the message to it. First prepare the addresses by flushing | |
3934 | out the result of previous attempts, and finding the first address that | |
3935 | is still to be delivered. */ | |
3936 | ||
3937 | first_addr = prepare_addresses(addrlist, host); | |
3938 | ||
3939 | DEBUG(D_transport) debug_printf("delivering %s to %s [%s] (%s%s)\n", | |
3940 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 3941 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
3942 | |
3943 | set_process_info("delivering %s to %s [%s] (%s%s)", | |
3944 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 3945 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
3946 | |
3947 | /* This is not for real; don't do the delivery. If there are | |
3948 | any remaining hosts, list them. */ | |
3949 | ||
3950 | if (dont_deliver) | |
3951 | { | |
3952 | host_item *host2; | |
895fbaf2 | 3953 | set_errno_nohost(addrlist, 0, NULL, OK, FALSE); |
7b4c8c1f | 3954 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
3955 | { |
3956 | addr->host_used = host; | |
3957 | addr->special_action = '*'; | |
3958 | addr->message = US"delivery bypassed by -N option"; | |
3959 | } | |
3960 | DEBUG(D_transport) | |
3961 | { | |
3962 | debug_printf("*** delivery by %s transport bypassed by -N option\n" | |
3963 | "*** host and remaining hosts:\n", tblock->name); | |
7b4c8c1f | 3964 | for (host2 = host; host2; host2 = host2->next) |
0756eb3c | 3965 | debug_printf(" %s [%s]\n", host2->name, |
7b4c8c1f | 3966 | host2->address ? host2->address : US"unset"); |
0756eb3c PH |
3967 | } |
3968 | rc = OK; | |
3969 | } | |
3970 | ||
3971 | /* This is for real. If the host is expired, we don't count it for | |
3972 | hosts_max_retry. This ensures that all hosts must expire before an address | |
8e669ac1 | 3973 | is timed out, unless hosts_max_try_hardlimit (which protects against |
533244af | 3974 | lunatic DNS configurations) is reached. |
8e669ac1 | 3975 | |
533244af PH |
3976 | If the host is not expired and we are about to hit the hosts_max_retry |
3977 | limit, check to see if there is a subsequent hosts with a different MX | |
3978 | value. If so, make that the next host, and don't count this one. This is a | |
3979 | heuristic to make sure that different MXs do get tried. With a normal kind | |
3980 | of retry rule, they would get tried anyway when the earlier hosts were | |
3981 | delayed, but if the domain has a "retry every time" type of rule - as is | |
3982 | often used for the the very large ISPs, that won't happen. */ | |
0756eb3c PH |
3983 | |
3984 | else | |
3985 | { | |
d427a7f9 JH |
3986 | host_item * thost; |
3987 | /* Make a copy of the host if it is local to this invocation | |
3988 | of the transport. */ | |
3989 | ||
3990 | if (expanded_hosts) | |
3991 | { | |
3992 | thost = store_get(sizeof(host_item)); | |
3993 | *thost = *host; | |
3994 | thost->name = string_copy(host->name); | |
3995 | thost->address = string_copy(host->address); | |
3996 | } | |
3997 | else | |
3998 | thost = host; | |
3999 | ||
0756eb3c PH |
4000 | if (!host_is_expired && ++unexpired_hosts_tried >= ob->hosts_max_try) |
4001 | { | |
4002 | host_item *h; | |
4003 | DEBUG(D_transport) | |
4004 | debug_printf("hosts_max_try limit reached with this host\n"); | |
1a47b633 JH |
4005 | for (h = host; h; h = h->next) if (h->mx != host->mx) |
4006 | { | |
4007 | nexthost = h; | |
4008 | unexpired_hosts_tried--; | |
4009 | DEBUG(D_transport) debug_printf("however, a higher MX host exists " | |
4010 | "and will be tried\n"); | |
4011 | break; | |
4012 | } | |
0756eb3c PH |
4013 | } |
4014 | ||
4015 | /* Attempt the delivery. */ | |
4016 | ||
533244af | 4017 | total_hosts_tried++; |
d427a7f9 JH |
4018 | rc = smtp_deliver(addrlist, thost, host_af, port, interface, tblock, |
4019 | &message_defer, FALSE); | |
0756eb3c PH |
4020 | |
4021 | /* Yield is one of: | |
4022 | OK => connection made, each address contains its result; | |
4023 | message_defer is set for message-specific defers (when all | |
4024 | recipients are marked defer) | |
4025 | DEFER => there was a non-message-specific delivery problem; | |
4026 | ERROR => there was a problem setting up the arguments for a filter, | |
4027 | or there was a problem with expanding added headers | |
4028 | */ | |
4029 | ||
4030 | /* If the result is not OK, there was a non-message-specific problem. | |
4031 | If the result is DEFER, we need to write to the logs saying what happened | |
4032 | for this particular host, except in the case of authentication and TLS | |
4033 | failures, where the log has already been written. If all hosts defer a | |
4034 | general message is written at the end. */ | |
4035 | ||
7b4c8c1f JH |
4036 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL |
4037 | && first_addr->basic_errno != ERRNO_TLSFAILURE) | |
0756eb3c PH |
4038 | write_logs(first_addr, host); |
4039 | ||
0cbf2b82 | 4040 | #ifndef DISABLE_EVENT |
d68218c7 | 4041 | if (rc == DEFER) |
774ef2d7 | 4042 | deferred_event_raise(first_addr, host); |
a7538db1 | 4043 | #endif |
d68218c7 | 4044 | |
0756eb3c PH |
4045 | /* If STARTTLS was accepted, but there was a failure in setting up the |
4046 | TLS session (usually a certificate screwup), and the host is not in | |
4047 | hosts_require_tls, and tls_tempfail_tryclear is true, try again, with | |
4048 | TLS forcibly turned off. We have to start from scratch with a new SMTP | |
4049 | connection. That's why the retry is done from here, not from within | |
4050 | smtp_deliver(). [Rejections of STARTTLS itself don't screw up the | |
4051 | session, so the in-clear transmission after those errors, if permitted, | |
4052 | happens inside smtp_deliver().] */ | |
4053 | ||
a7538db1 | 4054 | #ifdef SUPPORT_TLS |
7a31d643 JH |
4055 | if ( rc == DEFER |
4056 | && first_addr->basic_errno == ERRNO_TLSFAILURE | |
4057 | && ob->tls_tempfail_tryclear | |
5130845b | 4058 | && verify_check_given_host(&ob->hosts_require_tls, host) != OK |
7a31d643 | 4059 | ) |
0756eb3c PH |
4060 | { |
4061 | log_write(0, LOG_MAIN, "TLS session failure: delivering unencrypted " | |
4062 | "to %s [%s] (not in hosts_require_tls)", host->name, host->address); | |
4063 | first_addr = prepare_addresses(addrlist, host); | |
d427a7f9 JH |
4064 | rc = smtp_deliver(addrlist, thost, host_af, port, interface, tblock, |
4065 | &message_defer, TRUE); | |
0756eb3c PH |
4066 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL) |
4067 | write_logs(first_addr, host); | |
0cbf2b82 | 4068 | # ifndef DISABLE_EVENT |
d68218c7 | 4069 | if (rc == DEFER) |
774ef2d7 | 4070 | deferred_event_raise(first_addr, host); |
a7538db1 | 4071 | # endif |
0756eb3c | 4072 | } |
a1bccd48 | 4073 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
4074 | } |
4075 | ||
4076 | /* Delivery attempt finished */ | |
4077 | ||
7b4c8c1f JH |
4078 | rs = rc == OK ? US"OK" |
4079 | : rc == DEFER ? US"DEFER" | |
4080 | : rc == ERROR ? US"ERROR" | |
4081 | : US"?"; | |
0756eb3c PH |
4082 | |
4083 | set_process_info("delivering %s: just tried %s [%s] for %s%s: result %s", | |
4084 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4085 | addrlist->next ? " (& others)" : "", rs); |
0756eb3c PH |
4086 | |
4087 | /* Release serialization if set up */ | |
4088 | ||
7b4c8c1f | 4089 | if (serialize_key) enq_end(serialize_key); |
0756eb3c PH |
4090 | |
4091 | /* If the result is DEFER, or if a host retry record is known to exist, we | |
4092 | need to add an item to the retry chain for updating the retry database | |
4093 | at the end of delivery. We only need to add the item to the top address, | |
4094 | of course. Also, if DEFER, we mark the IP address unusable so as to skip it | |
4095 | for any other delivery attempts using the same address. (It is copied into | |
4096 | the unusable tree at the outer level, so even if different address blocks | |
4097 | contain the same address, it still won't get tried again.) */ | |
4098 | ||
7b4c8c1f | 4099 | if (rc == DEFER || retry_host_key) |
0756eb3c | 4100 | { |
7b4c8c1f JH |
4101 | int delete_flag = rc != DEFER ? rf_delete : 0; |
4102 | if (!retry_host_key) | |
0756eb3c | 4103 | { |
9c695f6d JH |
4104 | BOOL incl_ip; |
4105 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4106 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4107 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4108 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4109 | ||
7b4c8c1f JH |
4110 | retry_host_key = incl_ip |
4111 | ? string_sprintf("T:%S:%s%s", host->name, host->address, pistring) | |
4112 | : string_sprintf("T:%S%s", host->name, pistring); | |
0756eb3c PH |
4113 | } |
4114 | ||
4115 | /* If a delivery of another message over an existing SMTP connection | |
4116 | yields DEFER, we do NOT set up retry data for the host. This covers the | |
4117 | case when there are delays in routing the addresses in the second message | |
4118 | that are so long that the server times out. This is alleviated by not | |
4119 | routing addresses that previously had routing defers when handling an | |
4120 | existing connection, but even so, this case may occur (e.g. if a | |
4121 | previously happily routed address starts giving routing defers). If the | |
4122 | host is genuinely down, another non-continued message delivery will | |
4123 | notice it soon enough. */ | |
4124 | ||
7b4c8c1f | 4125 | if (delete_flag != 0 || !continue_hostname) |
0756eb3c PH |
4126 | retry_add_item(first_addr, retry_host_key, rf_host | delete_flag); |
4127 | ||
4128 | /* We may have tried an expired host, if its retry time has come; ensure | |
4129 | the status reflects the expiry for the benefit of any other addresses. */ | |
4130 | ||
4131 | if (rc == DEFER) | |
4132 | { | |
7b4c8c1f JH |
4133 | host->status = host_is_expired |
4134 | ? hstatus_unusable_expired : hstatus_unusable; | |
0756eb3c PH |
4135 | host->why = hwhy_deferred; |
4136 | } | |
4137 | } | |
4138 | ||
4139 | /* If message_defer is set (host was OK, but every recipient got deferred | |
4140 | because of some message-specific problem), or if that had happened | |
4141 | previously so that a message retry key exists, add an appropriate item | |
4142 | to the retry chain. Note that if there was a message defer but now there is | |
4143 | a host defer, the message defer record gets deleted. That seems perfectly | |
4144 | reasonable. Also, stop the message from being remembered as waiting | |
f6c332bd | 4145 | for specific hosts. */ |
0756eb3c | 4146 | |
7b4c8c1f | 4147 | if (message_defer || retry_message_key) |
0756eb3c | 4148 | { |
7b4c8c1f JH |
4149 | int delete_flag = message_defer ? 0 : rf_delete; |
4150 | if (!retry_message_key) | |
0756eb3c | 4151 | { |
9c695f6d JH |
4152 | BOOL incl_ip; |
4153 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4154 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4155 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4156 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4157 | ||
7b4c8c1f JH |
4158 | retry_message_key = incl_ip |
4159 | ? string_sprintf("T:%S:%s%s:%s", host->name, host->address, pistring, | |
4160 | message_id) | |
4161 | : string_sprintf("T:%S%s:%s", host->name, pistring, message_id); | |
0756eb3c PH |
4162 | } |
4163 | retry_add_item(addrlist, retry_message_key, | |
4164 | rf_message | rf_host | delete_flag); | |
f6c332bd | 4165 | update_waiting = FALSE; |
0756eb3c PH |
4166 | } |
4167 | ||
4168 | /* Any return other than DEFER (that is, OK or ERROR) means that the | |
4169 | addresses have got their final statuses filled in for this host. In the OK | |
4170 | case, see if any of them are deferred. */ | |
4171 | ||
4172 | if (rc == OK) | |
4cea764f | 4173 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4174 | if (addr->transport_return == DEFER) |
4175 | { | |
4176 | some_deferred = TRUE; | |
4177 | break; | |
4178 | } | |
0756eb3c PH |
4179 | |
4180 | /* If no addresses deferred or the result was ERROR, return. We do this for | |
4181 | ERROR because a failing filter set-up or add_headers expansion is likely to | |
4182 | fail for any host we try. */ | |
4183 | ||
4184 | if (rc == ERROR || (rc == OK && !some_deferred)) | |
4185 | { | |
4186 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4187 | return TRUE; /* Each address has its status */ | |
4188 | } | |
4189 | ||
4190 | /* If the result was DEFER or some individual addresses deferred, let | |
4191 | the loop run to try other hosts with the deferred addresses, except for the | |
4192 | case when we were trying to deliver down an existing channel and failed. | |
4193 | Don't try any other hosts in this case. */ | |
4194 | ||
7b4c8c1f | 4195 | if (continue_hostname) break; |
0756eb3c PH |
4196 | |
4197 | /* If the whole delivery, or some individual addresses, were deferred and | |
4198 | there are more hosts that could be tried, do not count this host towards | |
4199 | the hosts_max_try limit if the age of the message is greater than the | |
4200 | maximum retry time for this host. This means we may try try all hosts, | |
4201 | ignoring the limit, when messages have been around for some time. This is | |
4202 | important because if we don't try all hosts, the address will never time | |
533244af | 4203 | out. NOTE: this does not apply to hosts_max_try_hardlimit. */ |
0756eb3c | 4204 | |
7b4c8c1f | 4205 | if ((rc == DEFER || some_deferred) && nexthost) |
0756eb3c PH |
4206 | { |
4207 | BOOL timedout; | |
4208 | retry_config *retry = retry_find_config(host->name, NULL, 0, 0); | |
4209 | ||
7b4c8c1f | 4210 | if (retry && retry->rules) |
0756eb3c PH |
4211 | { |
4212 | retry_rule *last_rule; | |
4213 | for (last_rule = retry->rules; | |
7b4c8c1f | 4214 | last_rule->next; |
0756eb3c PH |
4215 | last_rule = last_rule->next); |
4216 | timedout = time(NULL) - received_time > last_rule->timeout; | |
4217 | } | |
4218 | else timedout = TRUE; /* No rule => timed out */ | |
4219 | ||
4220 | if (timedout) | |
4221 | { | |
4222 | unexpired_hosts_tried--; | |
4223 | DEBUG(D_transport) debug_printf("temporary delivery error(s) override " | |
4224 | "hosts_max_try (message older than host's retry time)\n"); | |
4225 | } | |
4226 | } | |
4227 | } /* End of loop for trying multiple hosts. */ | |
4228 | ||
4229 | /* This is the end of the loop that repeats iff expired is TRUE and | |
4230 | ob->delay_after_cutoff is FALSE. The second time round we will | |
4231 | try those hosts that haven't been tried since the message arrived. */ | |
4232 | ||
4233 | DEBUG(D_transport) | |
4234 | { | |
4235 | debug_printf("all IP addresses skipped or deferred at least one address\n"); | |
4236 | if (expired && !ob->delay_after_cutoff && cutoff_retry == 0) | |
4237 | debug_printf("retrying IP addresses not tried since message arrived\n"); | |
4238 | } | |
4239 | } | |
4240 | ||
4241 | ||
4242 | /* Get here if all IP addresses are skipped or defer at least one address. In | |
4243 | MUA wrapper mode, this will happen only for connection or other non-message- | |
4244 | specific failures. Force the delivery status for all addresses to FAIL. */ | |
4245 | ||
4246 | if (mua_wrapper) | |
4247 | { | |
7b4c8c1f | 4248 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4249 | addr->transport_return = FAIL; |
4250 | goto END_TRANSPORT; | |
4251 | } | |
4252 | ||
4253 | /* In the normal, non-wrapper case, add a standard message to each deferred | |
4254 | address if there hasn't been an error, that is, if it hasn't actually been | |
4255 | tried this time. The variable "expired" will be FALSE if any deliveries were | |
4256 | actually tried, or if there was at least one host that was not expired. That | |
4257 | is, it is TRUE only if no deliveries were tried and all hosts were expired. If | |
4258 | a delivery has been tried, an error code will be set, and the failing of the | |
4259 | message is handled by the retry code later. | |
4260 | ||
4261 | If queue_smtp is set, or this transport was called to send a subsequent message | |
4262 | down an existing TCP/IP connection, and something caused the host not to be | |
4263 | found, we end up here, but can detect these cases and handle them specially. */ | |
4264 | ||
c3f2eb9a | 4265 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4266 | { |
4267 | /* If host is not NULL, it means that we stopped processing the host list | |
533244af PH |
4268 | because of hosts_max_try or hosts_max_try_hardlimit. In the former case, this |
4269 | means we need to behave as if some hosts were skipped because their retry | |
4270 | time had not come. Specifically, this prevents the address from timing out. | |
8e669ac1 | 4271 | However, if we have hit hosts_max_try_hardlimit, we want to behave as if all |
533244af | 4272 | hosts were tried. */ |
0756eb3c | 4273 | |
c3f2eb9a | 4274 | if (host) |
533244af PH |
4275 | if (total_hosts_tried >= ob->hosts_max_try_hardlimit) |
4276 | { | |
4277 | DEBUG(D_transport) | |
4278 | debug_printf("hosts_max_try_hardlimit reached: behave as if all " | |
4279 | "hosts were tried\n"); | |
4280 | } | |
4281 | else | |
8e669ac1 | 4282 | { |
533244af PH |
4283 | DEBUG(D_transport) |
4284 | debug_printf("hosts_max_try limit caused some hosts to be skipped\n"); | |
4285 | setflag(addr, af_retry_skipped); | |
8e669ac1 | 4286 | } |
0756eb3c PH |
4287 | |
4288 | if (queue_smtp) /* no deliveries attempted */ | |
4289 | { | |
4290 | addr->transport_return = DEFER; | |
4291 | addr->basic_errno = 0; | |
4292 | addr->message = US"SMTP delivery explicitly queued"; | |
4293 | } | |
4294 | ||
c3f2eb9a JH |
4295 | else if ( addr->transport_return == DEFER |
4296 | && (addr->basic_errno == ERRNO_UNKNOWNERROR || addr->basic_errno == 0) | |
4297 | && !addr->message | |
4298 | ) | |
0756eb3c PH |
4299 | { |
4300 | addr->basic_errno = ERRNO_HRETRY; | |
c3f2eb9a | 4301 | if (continue_hostname) |
0756eb3c | 4302 | addr->message = US"no host found for existing SMTP connection"; |
0756eb3c PH |
4303 | else if (expired) |
4304 | { | |
fffffe4c | 4305 | setflag(addr, af_pass_message); /* This is not a security risk */ |
c3f2eb9a JH |
4306 | addr->message = string_sprintf( |
4307 | "all hosts%s have been failing for a long time %s", | |
4308 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US"", | |
4309 | ob->delay_after_cutoff | |
4310 | ? US"(and retry time not reached)" | |
4311 | : US"and were last tried after this message arrived"); | |
0756eb3c PH |
4312 | |
4313 | /* If we are already using fallback hosts, or there are no fallback hosts | |
4314 | defined, convert the result to FAIL to cause a bounce. */ | |
4315 | ||
c3f2eb9a | 4316 | if (addr->host_list == addr->fallback_hosts || !addr->fallback_hosts) |
0756eb3c PH |
4317 | addr->transport_return = FAIL; |
4318 | } | |
4319 | else | |
4320 | { | |
93a680e4 | 4321 | const char * s; |
0756eb3c | 4322 | if (hosts_retry == hosts_total) |
93a680e4 | 4323 | s = "retry time not reached for any host%s"; |
0756eb3c | 4324 | else if (hosts_fail == hosts_total) |
93a680e4 | 4325 | s = "all host address lookups%s failed permanently"; |
0756eb3c | 4326 | else if (hosts_defer == hosts_total) |
93a680e4 | 4327 | s = "all host address lookups%s failed temporarily"; |
0756eb3c | 4328 | else if (hosts_serial == hosts_total) |
93a680e4 | 4329 | s = "connection limit reached for all hosts%s"; |
0756eb3c | 4330 | else if (hosts_fail+hosts_defer == hosts_total) |
93a680e4 | 4331 | s = "all host address lookups%s failed"; |
3cf01803 | 4332 | else |
93a680e4 | 4333 | s = "some host address lookups failed and retry time " |
3cf01803 JH |
4334 | "not reached for other hosts or connection limit reached%s"; |
4335 | ||
4336 | addr->message = string_sprintf(s, | |
4337 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US""); | |
0756eb3c PH |
4338 | } |
4339 | } | |
4340 | } | |
4341 | ||
4342 | /* Update the database which keeps information about which messages are waiting | |
f6c332bd PH |
4343 | for which hosts to become available. For some message-specific errors, the |
4344 | update_waiting flag is turned off because we don't want follow-on deliveries in | |
ea722490 | 4345 | those cases. If this transport instance is explicitly limited to one message |
8b260705 PP |
4346 | per connection then follow-on deliveries are not possible and there's no need |
4347 | to create/update the per-transport wait-<transport_name> database. */ | |
0756eb3c | 4348 | |
ea722490 JH |
4349 | if (update_waiting && tblock->connection_max_messages != 1) |
4350 | transport_update_waiting(hostlist, tblock->name); | |
0756eb3c PH |
4351 | |
4352 | END_TRANSPORT: | |
4353 | ||
4354 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4355 | ||
4356 | return TRUE; /* Each address has its status */ | |
4357 | } | |
4358 | ||
578897ea JH |
4359 | /* vi: aw ai sw=2 |
4360 | */ | |
0756eb3c | 4361 | /* End of transport/smtp.c */ |