Commit | Line | Data |
---|---|---|
0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
d4e5e70b | 5 | /* Copyright (c) University of Cambridge 1995 - 2017 */ |
0756eb3c PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | #include "../exim.h" | |
9 | #include "smtp.h" | |
10 | ||
0756eb3c PH |
11 | |
12 | /* Options specific to the smtp transport. This transport also supports LMTP | |
13 | over TCP/IP. The options must be in alphabetic order (note that "_" comes | |
14 | before the lower case letters). Some live in the transport_instance block so as | |
15 | to be publicly visible; these are flagged with opt_public. */ | |
16 | ||
17 | optionlist smtp_transport_options[] = { | |
506900af JH |
18 | { "*expand_multi_domain", opt_stringptr | opt_hidden | opt_public, |
19 | (void *)offsetof(transport_instance, expand_multi_domain) }, | |
9c695f6d JH |
20 | { "*expand_retry_include_ip_address", opt_stringptr | opt_hidden, |
21 | (void *)(offsetof(smtp_transport_options_block, expand_retry_include_ip_address)) }, | |
22 | ||
48c7f9e2 PH |
23 | { "address_retry_include_sender", opt_bool, |
24 | (void *)offsetof(smtp_transport_options_block, address_retry_include_sender) }, | |
0756eb3c PH |
25 | { "allow_localhost", opt_bool, |
26 | (void *)offsetof(smtp_transport_options_block, allow_localhost) }, | |
27 | { "authenticated_sender", opt_stringptr, | |
28 | (void *)offsetof(smtp_transport_options_block, authenticated_sender) }, | |
382afc6b PH |
29 | { "authenticated_sender_force", opt_bool, |
30 | (void *)offsetof(smtp_transport_options_block, authenticated_sender_force) }, | |
0756eb3c PH |
31 | { "command_timeout", opt_time, |
32 | (void *)offsetof(smtp_transport_options_block, command_timeout) }, | |
33 | { "connect_timeout", opt_time, | |
34 | (void *)offsetof(smtp_transport_options_block, connect_timeout) }, | |
35 | { "connection_max_messages", opt_int | opt_public, | |
36 | (void *)offsetof(transport_instance, connection_max_messages) }, | |
37 | { "data_timeout", opt_time, | |
38 | (void *)offsetof(smtp_transport_options_block, data_timeout) }, | |
39 | { "delay_after_cutoff", opt_bool, | |
40 | (void *)offsetof(smtp_transport_options_block, delay_after_cutoff) }, | |
80a47a2c | 41 | #ifndef DISABLE_DKIM |
f7572e5a | 42 | { "dkim_canon", opt_stringptr, |
ff5aac2b | 43 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_canon) }, |
f7572e5a | 44 | { "dkim_domain", opt_stringptr, |
ff5aac2b | 45 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_domain) }, |
f7572e5a | 46 | { "dkim_private_key", opt_stringptr, |
ff5aac2b | 47 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_private_key) }, |
f7572e5a | 48 | { "dkim_selector", opt_stringptr, |
ff5aac2b | 49 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_selector) }, |
f7572e5a | 50 | { "dkim_sign_headers", opt_stringptr, |
ff5aac2b | 51 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_sign_headers) }, |
f7572e5a | 52 | { "dkim_strict", opt_stringptr, |
ff5aac2b | 53 | (void *)offsetof(smtp_transport_options_block, dkim.dkim_strict) }, |
80a47a2c | 54 | #endif |
0756eb3c PH |
55 | { "dns_qualify_single", opt_bool, |
56 | (void *)offsetof(smtp_transport_options_block, dns_qualify_single) }, | |
57 | { "dns_search_parents", opt_bool, | |
58 | (void *)offsetof(smtp_transport_options_block, dns_search_parents) }, | |
578897ea | 59 | { "dnssec_request_domains", opt_stringptr, |
7cd171b7 | 60 | (void *)offsetof(smtp_transport_options_block, dnssec.request) }, |
578897ea | 61 | { "dnssec_require_domains", opt_stringptr, |
7cd171b7 | 62 | (void *)offsetof(smtp_transport_options_block, dnssec.require) }, |
9e4f5962 PP |
63 | { "dscp", opt_stringptr, |
64 | (void *)offsetof(smtp_transport_options_block, dscp) }, | |
0756eb3c PH |
65 | { "fallback_hosts", opt_stringptr, |
66 | (void *)offsetof(smtp_transport_options_block, fallback_hosts) }, | |
67 | { "final_timeout", opt_time, | |
68 | (void *)offsetof(smtp_transport_options_block, final_timeout) }, | |
69 | { "gethostbyname", opt_bool, | |
70 | (void *)offsetof(smtp_transport_options_block, gethostbyname) }, | |
71 | { "helo_data", opt_stringptr, | |
72 | (void *)offsetof(smtp_transport_options_block, helo_data) }, | |
73 | { "hosts", opt_stringptr, | |
74 | (void *)offsetof(smtp_transport_options_block, hosts) }, | |
75 | { "hosts_avoid_esmtp", opt_stringptr, | |
76 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_esmtp) }, | |
c51b8e75 PH |
77 | { "hosts_avoid_pipelining", opt_stringptr, |
78 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_pipelining) }, | |
80a47a2c | 79 | #ifdef SUPPORT_TLS |
0756eb3c PH |
80 | { "hosts_avoid_tls", opt_stringptr, |
81 | (void *)offsetof(smtp_transport_options_block, hosts_avoid_tls) }, | |
80a47a2c | 82 | #endif |
0756eb3c PH |
83 | { "hosts_max_try", opt_int, |
84 | (void *)offsetof(smtp_transport_options_block, hosts_max_try) }, | |
533244af PH |
85 | { "hosts_max_try_hardlimit", opt_int, |
86 | (void *)offsetof(smtp_transport_options_block, hosts_max_try_hardlimit) }, | |
80a47a2c | 87 | #ifdef SUPPORT_TLS |
0756eb3c PH |
88 | { "hosts_nopass_tls", opt_stringptr, |
89 | (void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) }, | |
875512a3 JH |
90 | { "hosts_noproxy_tls", opt_stringptr, |
91 | (void *)offsetof(smtp_transport_options_block, hosts_noproxy_tls) }, | |
80a47a2c | 92 | #endif |
0756eb3c PH |
93 | { "hosts_override", opt_bool, |
94 | (void *)offsetof(smtp_transport_options_block, hosts_override) }, | |
95 | { "hosts_randomize", opt_bool, | |
96 | (void *)offsetof(smtp_transport_options_block, hosts_randomize) }, | |
f2de3a33 | 97 | #if defined(SUPPORT_TLS) && !defined(DISABLE_OCSP) |
44662487 JH |
98 | { "hosts_request_ocsp", opt_stringptr, |
99 | (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) }, | |
100 | #endif | |
0756eb3c PH |
101 | { "hosts_require_auth", opt_stringptr, |
102 | (void *)offsetof(smtp_transport_options_block, hosts_require_auth) }, | |
80a47a2c | 103 | #ifdef SUPPORT_TLS |
7a31d643 JH |
104 | # ifdef EXPERIMENTAL_DANE |
105 | { "hosts_require_dane", opt_stringptr, | |
106 | (void *)offsetof(smtp_transport_options_block, hosts_require_dane) }, | |
107 | # endif | |
f2de3a33 | 108 | # ifndef DISABLE_OCSP |
f5d78688 JH |
109 | { "hosts_require_ocsp", opt_stringptr, |
110 | (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) }, | |
111 | # endif | |
0756eb3c PH |
112 | { "hosts_require_tls", opt_stringptr, |
113 | (void *)offsetof(smtp_transport_options_block, hosts_require_tls) }, | |
80a47a2c | 114 | #endif |
0756eb3c PH |
115 | { "hosts_try_auth", opt_stringptr, |
116 | (void *)offsetof(smtp_transport_options_block, hosts_try_auth) }, | |
f98442df JH |
117 | { "hosts_try_chunking", opt_stringptr, |
118 | (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) }, | |
7a31d643 | 119 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
96e47838 TL |
120 | { "hosts_try_dane", opt_stringptr, |
121 | (void *)offsetof(smtp_transport_options_block, hosts_try_dane) }, | |
122 | #endif | |
fb05276a JH |
123 | { "hosts_try_fastopen", opt_stringptr, |
124 | (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) }, | |
8ccd00b1 | 125 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
126 | { "hosts_try_prdr", opt_stringptr, |
127 | (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) }, | |
128 | #endif | |
99400968 JH |
129 | #ifdef SUPPORT_TLS |
130 | { "hosts_verify_avoid_tls", opt_stringptr, | |
131 | (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) }, | |
132 | #endif | |
0756eb3c PH |
133 | { "interface", opt_stringptr, |
134 | (void *)offsetof(smtp_transport_options_block, interface) }, | |
135 | { "keepalive", opt_bool, | |
136 | (void *)offsetof(smtp_transport_options_block, keepalive) }, | |
f1513293 PH |
137 | { "lmtp_ignore_quota", opt_bool, |
138 | (void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) }, | |
0756eb3c PH |
139 | { "max_rcpt", opt_int | opt_public, |
140 | (void *)offsetof(transport_instance, max_addresses) }, | |
506900af | 141 | { "multi_domain", opt_expand_bool | opt_public, |
0756eb3c PH |
142 | (void *)offsetof(transport_instance, multi_domain) }, |
143 | { "port", opt_stringptr, | |
144 | (void *)offsetof(smtp_transport_options_block, port) }, | |
145 | { "protocol", opt_stringptr, | |
146 | (void *)offsetof(smtp_transport_options_block, protocol) }, | |
9c695f6d | 147 | { "retry_include_ip_address", opt_expand_bool, |
0756eb3c PH |
148 | (void *)offsetof(smtp_transport_options_block, retry_include_ip_address) }, |
149 | { "serialize_hosts", opt_stringptr, | |
150 | (void *)offsetof(smtp_transport_options_block, serialize_hosts) }, | |
151 | { "size_addition", opt_int, | |
152 | (void *)offsetof(smtp_transport_options_block, size_addition) } | |
f0989ec0 | 153 | #ifdef SUPPORT_SOCKS |
7eb6c37c JH |
154 | ,{ "socks_proxy", opt_stringptr, |
155 | (void *)offsetof(smtp_transport_options_block, socks_proxy) } | |
156 | #endif | |
80a47a2c | 157 | #ifdef SUPPORT_TLS |
0756eb3c PH |
158 | ,{ "tls_certificate", opt_stringptr, |
159 | (void *)offsetof(smtp_transport_options_block, tls_certificate) }, | |
160 | { "tls_crl", opt_stringptr, | |
161 | (void *)offsetof(smtp_transport_options_block, tls_crl) }, | |
54c90be1 PP |
162 | { "tls_dh_min_bits", opt_int, |
163 | (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) }, | |
0756eb3c PH |
164 | { "tls_privatekey", opt_stringptr, |
165 | (void *)offsetof(smtp_transport_options_block, tls_privatekey) }, | |
3f0945ff | 166 | { "tls_require_ciphers", opt_stringptr, |
0756eb3c | 167 | (void *)offsetof(smtp_transport_options_block, tls_require_ciphers) }, |
3f0945ff PP |
168 | { "tls_sni", opt_stringptr, |
169 | (void *)offsetof(smtp_transport_options_block, tls_sni) }, | |
0756eb3c PH |
170 | { "tls_tempfail_tryclear", opt_bool, |
171 | (void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) }, | |
a63be306 WB |
172 | { "tls_try_verify_hosts", opt_stringptr, |
173 | (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) }, | |
e51c7be2 JH |
174 | { "tls_verify_cert_hostnames", opt_stringptr, |
175 | (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)}, | |
0756eb3c | 176 | { "tls_verify_certificates", opt_stringptr, |
a63be306 WB |
177 | (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) }, |
178 | { "tls_verify_hosts", opt_stringptr, | |
179 | (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) } | |
80a47a2c | 180 | #endif |
0756eb3c PH |
181 | }; |
182 | ||
183 | /* Size of the options list. An extern variable has to be used so that its | |
184 | address can appear in the tables drtables.c. */ | |
185 | ||
186 | int smtp_transport_options_count = | |
187 | sizeof(smtp_transport_options)/sizeof(optionlist); | |
188 | ||
189 | /* Default private options block for the smtp transport. */ | |
190 | ||
191 | smtp_transport_options_block smtp_transport_option_defaults = { | |
192 | NULL, /* hosts */ | |
193 | NULL, /* fallback_hosts */ | |
194 | NULL, /* hostlist */ | |
195 | NULL, /* fallback_hostlist */ | |
196 | NULL, /* authenticated_sender */ | |
197 | US"$primary_hostname", /* helo_data */ | |
198 | NULL, /* interface */ | |
199 | NULL, /* port */ | |
200 | US"smtp", /* protocol */ | |
9e4f5962 | 201 | NULL, /* DSCP */ |
0756eb3c PH |
202 | NULL, /* serialize_hosts */ |
203 | NULL, /* hosts_try_auth */ | |
204 | NULL, /* hosts_require_auth */ | |
f98442df | 205 | US"*", /* hosts_try_chunking */ |
96e47838 TL |
206 | #ifdef EXPERIMENTAL_DANE |
207 | NULL, /* hosts_try_dane */ | |
7a31d643 | 208 | NULL, /* hosts_require_dane */ |
96e47838 | 209 | #endif |
fb05276a | 210 | NULL, /* hosts_try_fastopen */ |
8ccd00b1 | 211 | #ifndef DISABLE_PRDR |
f98442df | 212 | US"*", /* hosts_try_prdr */ |
f5d78688 | 213 | #endif |
f2de3a33 | 214 | #ifndef DISABLE_OCSP |
0e66b3b6 | 215 | US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */ |
f5d78688 | 216 | NULL, /* hosts_require_ocsp */ |
fd98a5c6 | 217 | #endif |
0756eb3c PH |
218 | NULL, /* hosts_require_tls */ |
219 | NULL, /* hosts_avoid_tls */ | |
6c9ed72e | 220 | NULL, /* hosts_verify_avoid_tls */ |
c51b8e75 | 221 | NULL, /* hosts_avoid_pipelining */ |
0756eb3c | 222 | NULL, /* hosts_avoid_esmtp */ |
57cc2785 | 223 | #ifdef SUPPORT_TLS |
0756eb3c | 224 | NULL, /* hosts_nopass_tls */ |
875512a3 | 225 | US"*", /* hosts_noproxy_tls */ |
57cc2785 | 226 | #endif |
0756eb3c PH |
227 | 5*60, /* command_timeout */ |
228 | 5*60, /* connect_timeout; shorter system default overrides */ | |
229 | 5*60, /* data timeout */ | |
230 | 10*60, /* final timeout */ | |
231 | 1024, /* size_addition */ | |
232 | 5, /* hosts_max_try */ | |
8e669ac1 | 233 | 50, /* hosts_max_try_hardlimit */ |
48c7f9e2 | 234 | TRUE, /* address_retry_include_sender */ |
0756eb3c | 235 | FALSE, /* allow_localhost */ |
382afc6b | 236 | FALSE, /* authenticated_sender_force */ |
0756eb3c PH |
237 | FALSE, /* gethostbyname */ |
238 | TRUE, /* dns_qualify_single */ | |
239 | FALSE, /* dns_search_parents */ | |
0539a19d | 240 | { NULL, NULL }, /* dnssec_domains {request,require} */ |
0756eb3c PH |
241 | TRUE, /* delay_after_cutoff */ |
242 | FALSE, /* hosts_override */ | |
243 | FALSE, /* hosts_randomize */ | |
244 | TRUE, /* keepalive */ | |
f1513293 | 245 | FALSE, /* lmtp_ignore_quota */ |
9c695f6d | 246 | NULL, /* expand_retry_include_ip_address */ |
0756eb3c | 247 | TRUE /* retry_include_ip_address */ |
f0989ec0 | 248 | #ifdef SUPPORT_SOCKS |
7eb6c37c | 249 | ,NULL /* socks_proxy */ |
b8bf753b | 250 | #endif |
80a47a2c | 251 | #ifdef SUPPORT_TLS |
0756eb3c PH |
252 | ,NULL, /* tls_certificate */ |
253 | NULL, /* tls_crl */ | |
254 | NULL, /* tls_privatekey */ | |
255 | NULL, /* tls_require_ciphers */ | |
54c90be1 | 256 | NULL, /* tls_sni */ |
0e0f3f56 | 257 | US"system", /* tls_verify_certificates */ |
54c90be1 PP |
258 | EXIM_CLIENT_DH_DEFAULT_MIN_BITS, |
259 | /* tls_dh_min_bits */ | |
a63be306 WB |
260 | TRUE, /* tls_tempfail_tryclear */ |
261 | NULL, /* tls_verify_hosts */ | |
610ff438 | 262 | US"*", /* tls_try_verify_hosts */ |
01a4a5c5 | 263 | US"*" /* tls_verify_cert_hostnames */ |
80a47a2c TK |
264 | #endif |
265 | #ifndef DISABLE_DKIM | |
ff5aac2b JH |
266 | , {NULL, /* dkim_canon */ |
267 | NULL, /* dkim_domain */ | |
268 | NULL, /* dkim_private_key */ | |
269 | NULL, /* dkim_selector */ | |
270 | NULL, /* dkim_sign_headers */ | |
e983e85a JH |
271 | NULL, /* dkim_strict */ |
272 | FALSE} /* dot_stuffed */ | |
80a47a2c | 273 | #endif |
0756eb3c PH |
274 | }; |
275 | ||
6c1c3d1d WB |
276 | /* some DSN flags for use later */ |
277 | ||
278 | static int rf_list[] = {rf_notify_never, rf_notify_success, | |
279 | rf_notify_failure, rf_notify_delay }; | |
280 | ||
45500060 | 281 | static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" }; |
6c1c3d1d WB |
282 | |
283 | ||
0756eb3c PH |
284 | |
285 | /* Local statics */ | |
286 | ||
87cb4a16 JH |
287 | static uschar *smtp_command; /* Points to last cmd for error messages */ |
288 | static uschar *mail_command; /* Points to MAIL cmd for error messages */ | |
289 | static uschar *data_command = US""; /* Points to DATA cmd for error messages */ | |
290 | static BOOL update_waiting; /* TRUE to update the "wait" database */ | |
875512a3 JH |
291 | |
292 | /*XXX move to smtp_context */ | |
87cb4a16 | 293 | static BOOL pipelining_active; /* current transaction is in pipe mode */ |
0756eb3c PH |
294 | |
295 | ||
296 | /************************************************* | |
297 | * Setup entry point * | |
298 | *************************************************/ | |
299 | ||
300 | /* This function is called when the transport is about to be used, | |
301 | but before running it in a sub-process. It is used for two things: | |
302 | ||
303 | (1) To set the fallback host list in addresses, when delivering. | |
26da7e20 PH |
304 | (2) To pass back the interface, port, protocol, and other options, for use |
305 | during callout verification. | |
0756eb3c PH |
306 | |
307 | Arguments: | |
308 | tblock pointer to the transport instance block | |
309 | addrlist list of addresses about to be transported | |
310 | tf if not NULL, pointer to block in which to return options | |
929ba01c PH |
311 | uid the uid that will be set (not used) |
312 | gid the gid that will be set (not used) | |
0756eb3c PH |
313 | errmsg place for error message (not used) |
314 | ||
315 | Returns: OK always (FAIL, DEFER not used) | |
316 | */ | |
317 | ||
318 | static int | |
319 | smtp_transport_setup(transport_instance *tblock, address_item *addrlist, | |
929ba01c | 320 | transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg) |
0756eb3c PH |
321 | { |
322 | smtp_transport_options_block *ob = | |
323 | (smtp_transport_options_block *)(tblock->options_block); | |
324 | ||
325 | errmsg = errmsg; /* Keep picky compilers happy */ | |
929ba01c PH |
326 | uid = uid; |
327 | gid = gid; | |
0756eb3c PH |
328 | |
329 | /* Pass back options if required. This interface is getting very messy. */ | |
330 | ||
02b41d71 | 331 | if (tf) |
0756eb3c PH |
332 | { |
333 | tf->interface = ob->interface; | |
334 | tf->port = ob->port; | |
335 | tf->protocol = ob->protocol; | |
336 | tf->hosts = ob->hosts; | |
337 | tf->hosts_override = ob->hosts_override; | |
338 | tf->hosts_randomize = ob->hosts_randomize; | |
339 | tf->gethostbyname = ob->gethostbyname; | |
340 | tf->qualify_single = ob->dns_qualify_single; | |
341 | tf->search_parents = ob->dns_search_parents; | |
26da7e20 | 342 | tf->helo_data = ob->helo_data; |
0756eb3c PH |
343 | } |
344 | ||
345 | /* Set the fallback host list for all the addresses that don't have fallback | |
346 | host lists, provided that the local host wasn't present in the original host | |
347 | list. */ | |
348 | ||
349 | if (!testflag(addrlist, af_local_host_removed)) | |
02b41d71 JH |
350 | for (; addrlist; addrlist = addrlist->next) |
351 | if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist; | |
0756eb3c PH |
352 | |
353 | return OK; | |
354 | } | |
355 | ||
356 | ||
357 | ||
358 | /************************************************* | |
359 | * Initialization entry point * | |
360 | *************************************************/ | |
361 | ||
362 | /* Called for each instance, after its options have been read, to | |
363 | enable consistency checks to be done, or anything else that needs | |
364 | to be set up. | |
365 | ||
366 | Argument: pointer to the transport instance block | |
367 | Returns: nothing | |
368 | */ | |
369 | ||
370 | void | |
371 | smtp_transport_init(transport_instance *tblock) | |
372 | { | |
373 | smtp_transport_options_block *ob = | |
374 | (smtp_transport_options_block *)(tblock->options_block); | |
375 | ||
376 | /* Retry_use_local_part defaults FALSE if unset */ | |
377 | ||
378 | if (tblock->retry_use_local_part == TRUE_UNSET) | |
379 | tblock->retry_use_local_part = FALSE; | |
380 | ||
381 | /* Set the default port according to the protocol */ | |
382 | ||
383 | if (ob->port == NULL) | |
061b7ebd PP |
384 | ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" : |
385 | (strcmpic(ob->protocol, US"smtps") == 0)? US"smtps" : US"smtp"; | |
0756eb3c PH |
386 | |
387 | /* Set up the setup entry point, to be called before subprocesses for this | |
388 | transport. */ | |
389 | ||
390 | tblock->setup = smtp_transport_setup; | |
391 | ||
392 | /* Complain if any of the timeouts are zero. */ | |
393 | ||
394 | if (ob->command_timeout <= 0 || ob->data_timeout <= 0 || | |
395 | ob->final_timeout <= 0) | |
396 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
397 | "command, data, or final timeout value is zero for %s transport", | |
398 | tblock->name); | |
399 | ||
400 | /* If hosts_override is set and there are local hosts, set the global | |
401 | flag that stops verify from showing router hosts. */ | |
402 | ||
403 | if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE; | |
404 | ||
405 | /* If there are any fallback hosts listed, build a chain of host items | |
406 | for them, but do not do any lookups at this time. */ | |
407 | ||
408 | host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE); | |
409 | } | |
410 | ||
411 | ||
412 | ||
413 | ||
414 | ||
415 | /************************************************* | |
416 | * Set delivery info into all active addresses * | |
417 | *************************************************/ | |
418 | ||
419 | /* Only addresses whose status is >= PENDING are relevant. A lesser | |
420 | status means that an address is not currently being processed. | |
421 | ||
422 | Arguments: | |
447d236c PH |
423 | addrlist points to a chain of addresses |
424 | errno_value to put in each address's errno field | |
425 | msg to put in each address's message field | |
426 | rc to put in each address's transport_return field | |
427 | pass_message if TRUE, set the "pass message" flag in the address | |
c562fd30 | 428 | host if set, mark addrs as having used this host |
895fbaf2 JH |
429 | smtp_greeting from peer |
430 | helo_response from peer | |
0756eb3c PH |
431 | |
432 | If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in | |
433 | the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate | |
434 | this particular type of timeout. | |
435 | ||
436 | Returns: nothing | |
437 | */ | |
438 | ||
7cd1141b PH |
439 | static void |
440 | set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
895fbaf2 JH |
441 | BOOL pass_message, host_item * host |
442 | #ifdef EXPERIMENTAL_DSN_INFO | |
443 | , const uschar * smtp_greeting, const uschar * helo_response | |
444 | #endif | |
445 | ) | |
0756eb3c PH |
446 | { |
447 | address_item *addr; | |
448 | int orvalue = 0; | |
449 | if (errno_value == ERRNO_CONNECTTIMEOUT) | |
450 | { | |
451 | errno_value = ETIMEDOUT; | |
452 | orvalue = RTEF_CTOUT; | |
453 | } | |
895fbaf2 | 454 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b | 455 | if (addr->transport_return >= PENDING) |
447d236c | 456 | { |
168dec3b JH |
457 | addr->basic_errno = errno_value; |
458 | addr->more_errno |= orvalue; | |
02b41d71 | 459 | if (msg) |
168dec3b JH |
460 | { |
461 | addr->message = msg; | |
462 | if (pass_message) setflag(addr, af_pass_message); | |
463 | } | |
464 | addr->transport_return = rc; | |
465 | if (host) | |
895fbaf2 | 466 | { |
168dec3b | 467 | addr->host_used = host; |
895fbaf2 JH |
468 | #ifdef EXPERIMENTAL_DSN_INFO |
469 | if (smtp_greeting) | |
470 | {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';} | |
471 | addr->smtp_greeting = smtp_greeting; | |
472 | ||
473 | if (helo_response) | |
474 | {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';} | |
475 | addr->helo_response = helo_response; | |
476 | #endif | |
477 | } | |
447d236c | 478 | } |
0756eb3c PH |
479 | } |
480 | ||
895fbaf2 JH |
481 | static void |
482 | set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc, | |
483 | BOOL pass_message) | |
484 | { | |
485 | set_errno(addrlist, errno_value, msg, rc, pass_message, NULL | |
486 | #ifdef EXPERIMENTAL_DSN_INFO | |
487 | , NULL, NULL | |
488 | #endif | |
489 | ); | |
490 | } | |
0756eb3c PH |
491 | |
492 | ||
493 | /************************************************* | |
494 | * Check an SMTP response * | |
495 | *************************************************/ | |
496 | ||
497 | /* This function is given an errno code and the SMTP response buffer | |
498 | to analyse, together with the host identification for generating messages. It | |
499 | sets an appropriate message and puts the first digit of the response code into | |
500 | the yield variable. If no response was actually read, a suitable digit is | |
501 | chosen. | |
502 | ||
503 | Arguments: | |
447d236c PH |
504 | host the current host, to get its name for messages |
505 | errno_value pointer to the errno value | |
506 | more_errno from the top address for use with ERRNO_FILTER_FAIL | |
507 | buffer the SMTP response buffer | |
508 | yield where to put a one-digit SMTP response code | |
4c04137d | 509 | message where to put an error message |
447d236c PH |
510 | pass_message set TRUE if message is an SMTP response |
511 | ||
512 | Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE | |
0756eb3c PH |
513 | */ |
514 | ||
a7538db1 JH |
515 | static BOOL |
516 | check_response(host_item *host, int *errno_value, int more_errno, | |
447d236c | 517 | uschar *buffer, int *yield, uschar **message, BOOL *pass_message) |
0756eb3c | 518 | { |
0d9fa8c0 | 519 | uschar * pl = pipelining_active ? US"pipelined " : US""; |
e9166683 | 520 | const uschar * s; |
0756eb3c PH |
521 | |
522 | *yield = '4'; /* Default setting is to give a temporary error */ | |
523 | ||
e9166683 | 524 | switch(*errno_value) |
0756eb3c | 525 | { |
e9166683 JH |
526 | case ETIMEDOUT: /* Handle response timeout */ |
527 | *message = US string_sprintf("SMTP timeout after %s%s", | |
528 | pl, smtp_command); | |
529 | if (transport_count > 0) | |
530 | *message = US string_sprintf("%s (%d bytes written)", *message, | |
531 | transport_count); | |
532 | return FALSE; | |
533 | ||
534 | case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */ | |
535 | s = string_printing(buffer); | |
536 | while (isspace(*s)) s++; | |
537 | *message = *s == 0 | |
538 | ? string_sprintf("Malformed SMTP reply (an empty line) " | |
539 | "in response to %s%s", pl, smtp_command) | |
540 | : string_sprintf("Malformed SMTP reply in response to %s%s: %s", | |
541 | pl, smtp_command, s); | |
542 | return FALSE; | |
543 | ||
544 | case ERRNO_FILTER_FAIL: /* Handle a failed filter process error; | |
545 | can't send QUIT as we mustn't end the DATA. */ | |
546 | *message = string_sprintf("transport filter process failed (%d)%s", | |
547 | more_errno, | |
548 | more_errno == EX_EXECFAILED ? ": unable to execute command" : ""); | |
549 | return FALSE; | |
550 | ||
551 | case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion; | |
552 | can't send QUIT as we mustn't end the DATA. */ | |
553 | *message = | |
554 | string_sprintf("failed to expand headers_add or headers_remove: %s", | |
555 | expand_string_message); | |
556 | return FALSE; | |
557 | ||
558 | case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */ | |
559 | *message = string_sprintf("failed to write a data block"); | |
560 | return FALSE; | |
0756eb3c | 561 | |
8c5d388a | 562 | #ifdef SUPPORT_I18N |
e9166683 JH |
563 | case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */ |
564 | *message = US"utf8 support required but not offered for forwarding"; | |
565 | DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message); | |
566 | return TRUE; | |
250b6871 | 567 | #endif |
e9166683 | 568 | } |
250b6871 | 569 | |
0756eb3c PH |
570 | /* Handle error responses from the remote mailer. */ |
571 | ||
572 | if (buffer[0] != 0) | |
573 | { | |
e9166683 JH |
574 | *message = string_sprintf("SMTP error from remote mail server after %s%s: " |
575 | "%s", pl, smtp_command, s = string_printing(buffer)); | |
447d236c | 576 | *pass_message = TRUE; |
0756eb3c PH |
577 | *yield = buffer[0]; |
578 | return TRUE; | |
579 | } | |
580 | ||
581 | /* No data was read. If there is no errno, this must be the EOF (i.e. | |
19b9dc85 PH |
582 | connection closed) case, which causes deferral. An explicit connection reset |
583 | error has the same effect. Otherwise, put the host's identity in the message, | |
584 | leaving the errno value to be interpreted as well. In all cases, we have to | |
585 | assume the connection is now dead. */ | |
0756eb3c | 586 | |
19b9dc85 | 587 | if (*errno_value == 0 || *errno_value == ECONNRESET) |
0756eb3c PH |
588 | { |
589 | *errno_value = ERRNO_SMTPCLOSED; | |
c562fd30 | 590 | *message = US string_sprintf("Remote host closed connection " |
02b41d71 | 591 | "in response to %s%s", pl, smtp_command); |
0756eb3c | 592 | } |
de6273b4 JH |
593 | else |
594 | *message = US string_sprintf("%s [%s]", host->name, host->address); | |
0756eb3c PH |
595 | |
596 | return FALSE; | |
597 | } | |
598 | ||
599 | ||
600 | ||
601 | /************************************************* | |
602 | * Write error message to logs * | |
603 | *************************************************/ | |
604 | ||
605 | /* This writes to the main log and to the message log. | |
606 | ||
607 | Arguments: | |
608 | addr the address item containing error information | |
609 | host the current host | |
610 | ||
611 | Returns: nothing | |
612 | */ | |
613 | ||
614 | static void | |
615 | write_logs(address_item *addr, host_item *host) | |
616 | { | |
584ddd64 JH |
617 | uschar * message = LOGGING(outgoing_port) |
618 | ? string_sprintf("H=%s [%s]:%d", host->name, host->address, | |
619 | host->port == PORT_NONE ? 25 : host->port) | |
620 | : string_sprintf("H=%s [%s]", host->name, host->address); | |
c562fd30 JH |
621 | |
622 | if (addr->message) | |
0756eb3c | 623 | { |
c562fd30 | 624 | message = string_sprintf("%s: %s", message, addr->message); |
0756eb3c PH |
625 | if (addr->basic_errno > 0) |
626 | message = string_sprintf("%s: %s", message, strerror(addr->basic_errno)); | |
627 | log_write(0, LOG_MAIN, "%s", message); | |
628 | deliver_msglog("%s %s\n", tod_stamp(tod_log), message); | |
629 | } | |
630 | else | |
631 | { | |
37f3dc43 JH |
632 | const uschar * s = exim_errstr(addr->basic_errno); |
633 | log_write(0, LOG_MAIN, "%s %s", message, s); | |
634 | deliver_msglog("%s %s %s\n", tod_stamp(tod_log), message, s); | |
0756eb3c PH |
635 | } |
636 | } | |
637 | ||
c562fd30 JH |
638 | static void |
639 | msglog_line(host_item * host, uschar * message) | |
640 | { | |
37f3dc43 JH |
641 | deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log), |
642 | host->name, host->address, message); | |
c562fd30 JH |
643 | } |
644 | ||
0756eb3c PH |
645 | |
646 | ||
0cbf2b82 | 647 | #ifndef DISABLE_EVENT |
d68218c7 JH |
648 | /************************************************* |
649 | * Post-defer action * | |
650 | *************************************************/ | |
651 | ||
652 | /* This expands an arbitrary per-transport string. | |
653 | It might, for example, be used to write to the database log. | |
654 | ||
655 | Arguments: | |
d68218c7 JH |
656 | addr the address item containing error information |
657 | host the current host | |
658 | ||
659 | Returns: nothing | |
660 | */ | |
661 | ||
662 | static void | |
774ef2d7 | 663 | deferred_event_raise(address_item *addr, host_item *host) |
d68218c7 | 664 | { |
774ef2d7 | 665 | uschar * action = addr->transport->event_action; |
55414b25 | 666 | const uschar * save_domain; |
a7538db1 JH |
667 | uschar * save_local; |
668 | ||
d68218c7 | 669 | if (!action) |
a7538db1 | 670 | return; |
d68218c7 | 671 | |
a7538db1 JH |
672 | save_domain = deliver_domain; |
673 | save_local = deliver_localpart; | |
674 | ||
675 | /*XXX would ip & port already be set up? */ | |
676 | deliver_host_address = string_copy(host->address); | |
774ef2d7 JH |
677 | deliver_host_port = host->port == PORT_NONE ? 25 : host->port; |
678 | event_defer_errno = addr->basic_errno; | |
d68218c7 JH |
679 | |
680 | router_name = addr->router->name; | |
681 | transport_name = addr->transport->name; | |
a7538db1 JH |
682 | deliver_domain = addr->domain; |
683 | deliver_localpart = addr->local_part; | |
684 | ||
774ef2d7 | 685 | (void) event_raise(action, US"msg:host:defer", |
a7538db1 JH |
686 | addr->message |
687 | ? addr->basic_errno > 0 | |
688 | ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno)) | |
689 | : string_copy(addr->message) | |
690 | : addr->basic_errno > 0 | |
691 | ? string_copy(US strerror(addr->basic_errno)) | |
692 | : NULL); | |
693 | ||
694 | deliver_localpart = save_local; | |
695 | deliver_domain = save_domain; | |
d68218c7 JH |
696 | router_name = transport_name = NULL; |
697 | } | |
698 | #endif | |
699 | ||
0756eb3c PH |
700 | /************************************************* |
701 | * Synchronize SMTP responses * | |
702 | *************************************************/ | |
703 | ||
704 | /* This function is called from smtp_deliver() to receive SMTP responses from | |
705 | the server, and match them up with the commands to which they relate. When | |
706 | PIPELINING is not in use, this function is called after every command, and is | |
707 | therefore somewhat over-engineered, but it is simpler to use a single scheme | |
708 | that works both with and without PIPELINING instead of having two separate sets | |
709 | of code. | |
710 | ||
711 | The set of commands that are buffered up with pipelining may start with MAIL | |
712 | and may end with DATA; in between are RCPT commands that correspond to the | |
713 | addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH, | |
714 | etc.) are never buffered. | |
715 | ||
716 | Errors after MAIL or DATA abort the whole process leaving the response in the | |
717 | buffer. After MAIL, pending responses are flushed, and the original command is | |
718 | re-instated in big_buffer for error messages. For RCPT commands, the remote is | |
719 | permitted to reject some recipient addresses while accepting others. However | |
720 | certain errors clearly abort the whole process. Set the value in | |
721 | transport_return to PENDING_OK if the address is accepted. If there is a | |
722 | subsequent general error, it will get reset accordingly. If not, it will get | |
723 | converted to OK at the end. | |
724 | ||
725 | Arguments: | |
df5b41e3 | 726 | sx smtp connection context |
48c7f9e2 | 727 | count the number of responses to read |
48c7f9e2 PH |
728 | pending_DATA 0 if last command sent was not DATA |
729 | +1 if previously had a good recipient | |
730 | -1 if not previously had a good recipient | |
0756eb3c PH |
731 | |
732 | Returns: 3 if at least one address had 2xx and one had 5xx | |
733 | 2 if at least one address had 5xx but none had 2xx | |
734 | 1 if at least one host had a 2xx response, but none had 5xx | |
735 | 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA) | |
736 | -1 timeout while reading RCPT response | |
737 | -2 I/O or other non-response error for RCPT | |
738 | -3 DATA or MAIL failed - errno and buffer set | |
739 | */ | |
740 | ||
741 | static int | |
df5b41e3 | 742 | sync_responses(smtp_context * sx, int count, int pending_DATA) |
0756eb3c | 743 | { |
df5b41e3 | 744 | address_item *addr = sx->sync_addr; |
e9166683 JH |
745 | smtp_transport_options_block *ob = |
746 | (smtp_transport_options_block *)sx->tblock->options_block; | |
0756eb3c PH |
747 | int yield = 0; |
748 | ||
749 | /* Handle the response for a MAIL command. On error, reinstate the original | |
750 | command in big_buffer for error message use, and flush any further pending | |
751 | responses before returning, except after I/O errors and timeouts. */ | |
752 | ||
df5b41e3 | 753 | if (sx->pending_MAIL) |
0756eb3c PH |
754 | { |
755 | count--; | |
e9166683 JH |
756 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
757 | '2', ob->command_timeout)) | |
0756eb3c | 758 | { |
e027f545 | 759 | DEBUG(D_transport) debug_printf("bad response for MAIL\n"); |
0756eb3c | 760 | Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */ |
df5b41e3 | 761 | if (errno == 0 && sx->buffer[0] != 0) |
0756eb3c PH |
762 | { |
763 | uschar flushbuffer[4096]; | |
e97957bc | 764 | int save_errno = 0; |
df5b41e3 | 765 | if (sx->buffer[0] == '4') |
e97957bc PH |
766 | { |
767 | save_errno = ERRNO_MAIL4XX; | |
df5b41e3 | 768 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc | 769 | } |
0756eb3c PH |
770 | while (count-- > 0) |
771 | { | |
df5b41e3 | 772 | if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer), |
e9166683 | 773 | '2', ob->command_timeout) |
0756eb3c PH |
774 | && (errno != 0 || flushbuffer[0] == 0)) |
775 | break; | |
776 | } | |
e97957bc | 777 | errno = save_errno; |
0756eb3c | 778 | } |
c562fd30 JH |
779 | |
780 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
781 | while (count-- > 0) /* Mark any pending addrs with the host used */ | |
782 | { | |
783 | while (addr->transport_return != PENDING_DEFER) addr = addr->next; | |
df5b41e3 | 784 | addr->host_used = sx->host; |
c562fd30 JH |
785 | addr = addr->next; |
786 | } | |
0756eb3c PH |
787 | return -3; |
788 | } | |
789 | } | |
790 | ||
791 | if (pending_DATA) count--; /* Number of RCPT responses to come */ | |
792 | ||
793 | /* Read and handle the required number of RCPT responses, matching each one up | |
794 | with an address by scanning for the next address whose status is PENDING_DEFER. | |
795 | */ | |
796 | ||
797 | while (count-- > 0) | |
798 | { | |
4c2471ca JH |
799 | while (addr->transport_return != PENDING_DEFER) |
800 | if (!(addr = addr->next)) | |
801 | return -2; | |
0756eb3c PH |
802 | |
803 | /* The address was accepted */ | |
df5b41e3 | 804 | addr->host_used = sx->host; |
0756eb3c | 805 | |
e9166683 JH |
806 | if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
807 | '2', ob->command_timeout)) | |
0756eb3c PH |
808 | { |
809 | yield |= 1; | |
810 | addr->transport_return = PENDING_OK; | |
811 | ||
812 | /* If af_dr_retry_exists is set, there was a routing delay on this address; | |
09945f1e PH |
813 | ensure that any address-specific retry record is expunged. We do this both |
814 | for the basic key and for the version that also includes the sender. */ | |
0756eb3c PH |
815 | |
816 | if (testflag(addr, af_dr_retry_exists)) | |
09945f1e PH |
817 | { |
818 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, | |
819 | sender_address); | |
820 | retry_add_item(addr, altkey, rf_delete); | |
0756eb3c | 821 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
09945f1e | 822 | } |
0756eb3c PH |
823 | } |
824 | ||
825 | /* Timeout while reading the response */ | |
826 | ||
827 | else if (errno == ETIMEDOUT) | |
828 | { | |
c562fd30 | 829 | uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>", |
e9166683 | 830 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
df5b41e3 | 831 | set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE); |
0756eb3c | 832 | retry_add_item(addr, addr->address_retry_key, 0); |
f6c332bd | 833 | update_waiting = FALSE; |
0756eb3c PH |
834 | return -1; |
835 | } | |
836 | ||
837 | /* Handle other errors in obtaining an SMTP response by returning -1. This | |
838 | will cause all the addresses to be deferred. Restore the SMTP command in | |
839 | big_buffer for which we are checking the response, so the error message | |
840 | makes sense. */ | |
841 | ||
df5b41e3 | 842 | else if (errno != 0 || sx->buffer[0] == 0) |
0756eb3c PH |
843 | { |
844 | string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>", | |
df5b41e3 | 845 | transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes)); |
0756eb3c PH |
846 | return -2; |
847 | } | |
848 | ||
849 | /* Handle SMTP permanent and temporary response codes. */ | |
850 | ||
851 | else | |
852 | { | |
853 | addr->message = | |
447d236c | 854 | string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: " |
df5b41e3 JH |
855 | "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes), |
856 | string_printing(sx->buffer)); | |
447d236c | 857 | setflag(addr, af_pass_message); |
e9166683 JH |
858 | if (!sx->verify) |
859 | msglog_line(sx->host, addr->message); | |
0756eb3c PH |
860 | |
861 | /* The response was 5xx */ | |
862 | ||
df5b41e3 | 863 | if (sx->buffer[0] == '5') |
0756eb3c PH |
864 | { |
865 | addr->transport_return = FAIL; | |
866 | yield |= 2; | |
867 | } | |
868 | ||
869 | /* The response was 4xx */ | |
870 | ||
871 | else | |
872 | { | |
0756eb3c PH |
873 | addr->transport_return = DEFER; |
874 | addr->basic_errno = ERRNO_RCPT4XX; | |
df5b41e3 | 875 | addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
0756eb3c | 876 | |
e9166683 JH |
877 | if (!sx->verify) |
878 | { | |
0cbf2b82 | 879 | #ifndef DISABLE_EVENT |
e9166683 JH |
880 | event_defer_errno = addr->more_errno; |
881 | msg_event_raise(US"msg:rcpt:host:defer", addr); | |
5ef5dd52 JB |
882 | #endif |
883 | ||
e9166683 JH |
884 | /* Log temporary errors if there are more hosts to be tried. |
885 | If not, log this last one in the == line. */ | |
0756eb3c | 886 | |
e9166683 JH |
887 | if (sx->host->next) |
888 | log_write(0, LOG_MAIN, "H=%s [%s]: %s", | |
889 | sx->host->name, sx->host->address, addr->message); | |
0756eb3c | 890 | |
0cbf2b82 | 891 | #ifndef DISABLE_EVENT |
e9166683 JH |
892 | else |
893 | msg_event_raise(US"msg:rcpt:defer", addr); | |
5ef5dd52 JB |
894 | #endif |
895 | ||
e9166683 JH |
896 | /* Do not put this message on the list of those waiting for specific |
897 | hosts, as otherwise it is likely to be tried too often. */ | |
0756eb3c | 898 | |
e9166683 | 899 | update_waiting = FALSE; |
0756eb3c | 900 | |
e9166683 JH |
901 | /* Add a retry item for the address so that it doesn't get tried again |
902 | too soon. If address_retry_include_sender is true, add the sender address | |
903 | to the retry key. */ | |
0756eb3c | 904 | |
e9166683 JH |
905 | retry_add_item(addr, |
906 | ob->address_retry_include_sender | |
907 | ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address) | |
908 | : addr->address_retry_key, | |
909 | 0); | |
910 | } | |
0756eb3c PH |
911 | } |
912 | } | |
913 | } /* Loop for next RCPT response */ | |
914 | ||
915 | /* Update where to start at for the next block of responses, unless we | |
916 | have already handled all the addresses. */ | |
917 | ||
e9166683 | 918 | if (addr) sx->sync_addr = addr->next; |
0756eb3c PH |
919 | |
920 | /* Handle a response to DATA. If we have not had any good recipients, either | |
921 | previously or in this block, the response is ignored. */ | |
922 | ||
923 | if (pending_DATA != 0 && | |
e9166683 JH |
924 | !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
925 | '3', ob->command_timeout)) | |
0756eb3c PH |
926 | { |
927 | int code; | |
928 | uschar *msg; | |
447d236c | 929 | BOOL pass_message; |
e97957bc PH |
930 | if (pending_DATA > 0 || (yield & 1) != 0) |
931 | { | |
df5b41e3 | 932 | if (errno == 0 && sx->buffer[0] == '4') |
e97957bc PH |
933 | { |
934 | errno = ERRNO_DATA4XX; | |
df5b41e3 | 935 | sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e97957bc PH |
936 | } |
937 | return -3; | |
938 | } | |
df5b41e3 | 939 | (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message); |
0756eb3c PH |
940 | DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining " |
941 | "is in use and there were no good recipients\n", msg); | |
942 | } | |
943 | ||
944 | /* All responses read and handled; MAIL (if present) received 2xx and DATA (if | |
945 | present) received 3xx. If any RCPTs were handled and yielded anything other | |
946 | than 4xx, yield will be set non-zero. */ | |
947 | ||
948 | return yield; | |
949 | } | |
950 | ||
951 | ||
952 | ||
fcc8e047 JH |
953 | /* Do the client side of smtp-level authentication */ |
954 | /* | |
955 | Arguments: | |
956 | buffer EHLO response from server (gets overwritten) | |
957 | addrlist chain of potential addresses to deliver | |
958 | host host to deliver to | |
959 | ob transport options | |
960 | ibp, obp comms channel control blocks | |
961 | ||
962 | Returns: | |
963 | OK Success, or failed (but not required): global "smtp_authenticated" set | |
964 | DEFER Failed authentication (and was required) | |
965 | ERROR Internal problem | |
966 | ||
967 | FAIL_SEND Failed communications - transmit | |
968 | FAIL - response | |
969 | */ | |
970 | ||
971 | int | |
972 | smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host, | |
973 | smtp_transport_options_block *ob, BOOL is_esmtp, | |
974 | smtp_inblock *ibp, smtp_outblock *obp) | |
975 | { | |
a7538db1 JH |
976 | int require_auth; |
977 | uschar *fail_reason = US"server did not advertise AUTH support"; | |
fcc8e047 | 978 | |
a7538db1 JH |
979 | smtp_authenticated = FALSE; |
980 | client_authenticator = client_authenticated_id = client_authenticated_sender = NULL; | |
5130845b | 981 | require_auth = verify_check_given_host(&ob->hosts_require_auth, host); |
fcc8e047 | 982 | |
a7538db1 JH |
983 | if (is_esmtp && !regex_AUTH) regex_AUTH = |
984 | regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)", | |
985 | FALSE, TRUE); | |
fcc8e047 | 986 | |
a7538db1 JH |
987 | if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1)) |
988 | { | |
989 | uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]); | |
990 | expand_nmax = -1; /* reset */ | |
fcc8e047 | 991 | |
a7538db1 JH |
992 | /* Must not do this check until after we have saved the result of the |
993 | regex match above. */ | |
fcc8e047 | 994 | |
a7538db1 | 995 | if (require_auth == OK || |
5130845b | 996 | verify_check_given_host(&ob->hosts_try_auth, host) == OK) |
a7538db1 JH |
997 | { |
998 | auth_instance *au; | |
999 | fail_reason = US"no common mechanisms were found"; | |
fcc8e047 | 1000 | |
a7538db1 | 1001 | DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n"); |
fcc8e047 | 1002 | |
a7538db1 JH |
1003 | /* Scan the configured authenticators looking for one which is configured |
1004 | for use as a client, which is not suppressed by client_condition, and | |
1005 | whose name matches an authentication mechanism supported by the server. | |
1006 | If one is found, attempt to authenticate by calling its client function. | |
1007 | */ | |
fcc8e047 | 1008 | |
a7538db1 JH |
1009 | for (au = auths; !smtp_authenticated && au != NULL; au = au->next) |
1010 | { | |
1011 | uschar *p = names; | |
1012 | if (!au->client || | |
1013 | (au->client_condition != NULL && | |
1014 | !expand_check_condition(au->client_condition, au->name, | |
1015 | US"client authenticator"))) | |
1016 | { | |
1017 | DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n", | |
1018 | au->name, | |
1019 | (au->client)? "client_condition is false" : | |
1020 | "not configured as a client"); | |
1021 | continue; | |
1022 | } | |
fcc8e047 | 1023 | |
a7538db1 | 1024 | /* Loop to scan supported server mechanisms */ |
fcc8e047 | 1025 | |
a7538db1 JH |
1026 | while (*p != 0) |
1027 | { | |
1028 | int rc; | |
1029 | int len = Ustrlen(au->public_name); | |
1030 | while (isspace(*p)) p++; | |
fcc8e047 | 1031 | |
a7538db1 JH |
1032 | if (strncmpic(au->public_name, p, len) != 0 || |
1033 | (p[len] != 0 && !isspace(p[len]))) | |
1034 | { | |
1035 | while (*p != 0 && !isspace(*p)) p++; | |
1036 | continue; | |
1037 | } | |
fcc8e047 | 1038 | |
a7538db1 JH |
1039 | /* Found data for a listed mechanism. Call its client entry. Set |
1040 | a flag in the outblock so that data is overwritten after sending so | |
1041 | that reflections don't show it. */ | |
fcc8e047 | 1042 | |
a7538db1 JH |
1043 | fail_reason = US"authentication attempt(s) failed"; |
1044 | obp->authenticating = TRUE; | |
1045 | rc = (au->info->clientcode)(au, ibp, obp, | |
1046 | ob->command_timeout, buffer, bufsize); | |
1047 | obp->authenticating = FALSE; | |
1048 | DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n", | |
1049 | au->name, rc); | |
fcc8e047 | 1050 | |
a7538db1 JH |
1051 | /* A temporary authentication failure must hold up delivery to |
1052 | this host. After a permanent authentication failure, we carry on | |
1053 | to try other authentication methods. If all fail hard, try to | |
1054 | deliver the message unauthenticated unless require_auth was set. */ | |
fcc8e047 | 1055 | |
a7538db1 JH |
1056 | switch(rc) |
1057 | { | |
1058 | case OK: | |
1059 | smtp_authenticated = TRUE; /* stops the outer loop */ | |
1060 | client_authenticator = au->name; | |
1061 | if (au->set_client_id != NULL) | |
1062 | client_authenticated_id = expand_string(au->set_client_id); | |
1063 | break; | |
1064 | ||
1065 | /* Failure after writing a command */ | |
1066 | ||
1067 | case FAIL_SEND: | |
1068 | return FAIL_SEND; | |
1069 | ||
1070 | /* Failure after reading a response */ | |
1071 | ||
1072 | case FAIL: | |
1073 | if (errno != 0 || buffer[0] != '5') return FAIL; | |
1074 | log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s", | |
1075 | au->name, host->name, host->address, buffer); | |
1076 | break; | |
1077 | ||
1078 | /* Failure by some other means. In effect, the authenticator | |
1079 | decided it wasn't prepared to handle this case. Typically this | |
1080 | is the result of "fail" in an expansion string. Do we need to | |
1081 | log anything here? Feb 2006: a message is now put in the buffer | |
1082 | if logging is required. */ | |
1083 | ||
1084 | case CANCELLED: | |
1085 | if (*buffer != 0) | |
1086 | log_write(0, LOG_MAIN, "%s authenticator cancelled " | |
1087 | "authentication H=%s [%s] %s", au->name, host->name, | |
1088 | host->address, buffer); | |
1089 | break; | |
1090 | ||
1091 | /* Internal problem, message in buffer. */ | |
1092 | ||
1093 | case ERROR: | |
895fbaf2 JH |
1094 | set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer), |
1095 | DEFER, FALSE); | |
a7538db1 JH |
1096 | return ERROR; |
1097 | } | |
fcc8e047 | 1098 | |
a7538db1 JH |
1099 | break; /* If not authenticated, try next authenticator */ |
1100 | } /* Loop for scanning supported server mechanisms */ | |
1101 | } /* Loop for further authenticators */ | |
fcc8e047 | 1102 | } |
a7538db1 | 1103 | } |
fcc8e047 | 1104 | |
a7538db1 | 1105 | /* If we haven't authenticated, but are required to, give up. */ |
fcc8e047 | 1106 | |
a7538db1 JH |
1107 | if (require_auth == OK && !smtp_authenticated) |
1108 | { | |
895fbaf2 | 1109 | set_errno_nohost(addrlist, ERRNO_AUTHFAIL, |
a7538db1 | 1110 | string_sprintf("authentication required but %s", fail_reason), DEFER, |
895fbaf2 | 1111 | FALSE); |
a7538db1 JH |
1112 | return DEFER; |
1113 | } | |
4d8d62b9 | 1114 | |
a7538db1 | 1115 | return OK; |
fcc8e047 JH |
1116 | } |
1117 | ||
1118 | ||
1119 | /* Construct AUTH appendix string for MAIL TO */ | |
1120 | /* | |
1121 | Arguments | |
1122 | buffer to build string | |
1123 | addrlist chain of potential addresses to deliver | |
1124 | ob transport options | |
1125 | ||
1126 | Globals smtp_authenticated | |
1127 | client_authenticated_sender | |
1128 | Return True on error, otherwise buffer has (possibly empty) terminated string | |
1129 | */ | |
1130 | ||
1131 | BOOL | |
1132 | smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist, | |
1133 | smtp_transport_options_block *ob) | |
1134 | { | |
1135 | uschar *local_authenticated_sender = authenticated_sender; | |
1136 | ||
1137 | #ifdef notdef | |
1138 | debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N"); | |
1139 | #endif | |
1140 | ||
1141 | if (ob->authenticated_sender != NULL) | |
1142 | { | |
1143 | uschar *new = expand_string(ob->authenticated_sender); | |
1144 | if (new == NULL) | |
1145 | { | |
1146 | if (!expand_string_forcedfail) | |
1147 | { | |
1148 | uschar *message = string_sprintf("failed to expand " | |
1149 | "authenticated_sender: %s", expand_string_message); | |
895fbaf2 | 1150 | set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
fcc8e047 JH |
1151 | return TRUE; |
1152 | } | |
1153 | } | |
1154 | else if (new[0] != 0) local_authenticated_sender = new; | |
1155 | } | |
1156 | ||
1157 | /* Add the authenticated sender address if present */ | |
1158 | ||
1159 | if ((smtp_authenticated || ob->authenticated_sender_force) && | |
1160 | local_authenticated_sender != NULL) | |
1161 | { | |
1162 | string_format(buffer, bufsize, " AUTH=%s", | |
1163 | auth_xtextencode(local_authenticated_sender, | |
1164 | Ustrlen(local_authenticated_sender))); | |
1165 | client_authenticated_sender = string_copy(local_authenticated_sender); | |
1166 | } | |
1167 | else | |
1168 | *buffer= 0; | |
1169 | ||
1170 | return FALSE; | |
1171 | } | |
1172 | ||
1173 | ||
1174 | ||
0e66b3b6 | 1175 | #ifdef EXPERIMENTAL_DANE |
2d5fdd53 JH |
1176 | /* Lookup TLSA record for host/port. |
1177 | Return: OK success with dnssec; DANE mode | |
1178 | DEFER Do not use this host now, may retry later | |
1179 | FAIL_FORCED No TLSA record; DANE not usable | |
1180 | FAIL Do not use this connection | |
1181 | */ | |
1182 | ||
0e66b3b6 | 1183 | int |
4b0fe319 | 1184 | tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required) |
0e66b3b6 JH |
1185 | { |
1186 | /* move this out to host.c given the similarity to dns_lookup() ? */ | |
1187 | uschar buffer[300]; | |
55414b25 | 1188 | const uschar * fullname = buffer; |
58c30e47 JH |
1189 | int rc; |
1190 | BOOL sec; | |
0e66b3b6 JH |
1191 | |
1192 | /* TLSA lookup string */ | |
1193 | (void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name); | |
1194 | ||
58c30e47 JH |
1195 | rc = dns_lookup(dnsa, buffer, T_TLSA, &fullname); |
1196 | sec = dns_is_secure(dnsa); | |
1197 | DEBUG(D_transport) | |
1198 | debug_printf("TLSA lookup ret %d %sDNSSEC\n", rc, sec ? "" : "not "); | |
1199 | ||
1200 | switch (rc) | |
0e66b3b6 | 1201 | { |
0e66b3b6 | 1202 | case DNS_SUCCEED: |
58c30e47 | 1203 | if (sec) return OK; |
2d5fdd53 | 1204 | |
58c30e47 JH |
1205 | log_write(0, LOG_MAIN, "DANE error: TLSA lookup not DNSSEC"); |
1206 | /*FALLTHROUGH*/ | |
2d5fdd53 JH |
1207 | case DNS_AGAIN: |
1208 | return DEFER; /* just defer this TLS'd conn */ | |
1209 | ||
ef3a1a30 JH |
1210 | case DNS_NODATA: /* no TLSA RR for this lookup */ |
1211 | case DNS_NOMATCH: /* no records at all for this lookup */ | |
6b524204 | 1212 | return dane_required ? FAIL : FAIL_FORCED; |
2d5fdd53 JH |
1213 | |
1214 | default: | |
1215 | case DNS_FAIL: | |
1216 | return dane_required ? FAIL : DEFER; | |
0e66b3b6 | 1217 | } |
0e66b3b6 JH |
1218 | } |
1219 | #endif | |
1220 | ||
1221 | ||
a39bd74d JB |
1222 | |
1223 | typedef struct smtp_compare_s | |
1224 | { | |
1225 | uschar *current_sender_address; | |
1226 | struct transport_instance *tblock; | |
1227 | } smtp_compare_t; | |
1228 | ||
d093f8e5 JH |
1229 | |
1230 | /* Create a unique string that identifies this message, it is based on | |
1231 | sender_address, helo_data and tls_certificate if enabled. | |
1232 | */ | |
a39bd74d JB |
1233 | |
1234 | static uschar * | |
1235 | smtp_local_identity(uschar * sender, struct transport_instance * tblock) | |
1236 | { | |
1237 | address_item * addr1; | |
1238 | uschar * if1 = US""; | |
1239 | uschar * helo1 = US""; | |
1240 | #ifdef SUPPORT_TLS | |
1241 | uschar * tlsc1 = US""; | |
1242 | #endif | |
1243 | uschar * save_sender_address = sender_address; | |
1244 | uschar * local_identity = NULL; | |
1245 | smtp_transport_options_block * ob = | |
1246 | (smtp_transport_options_block *)tblock->options_block; | |
1247 | ||
1248 | sender_address = sender; | |
1249 | ||
1250 | addr1 = deliver_make_addr (sender, TRUE); | |
1251 | deliver_set_expansions(addr1); | |
1252 | ||
1253 | if (ob->interface) | |
1254 | if1 = expand_string(ob->interface); | |
1255 | ||
1256 | if (ob->helo_data) | |
1257 | helo1 = expand_string(ob->helo_data); | |
1258 | ||
1259 | #ifdef SUPPORT_TLS | |
1260 | if (ob->tls_certificate) | |
1261 | tlsc1 = expand_string(ob->tls_certificate); | |
1262 | local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1); | |
1263 | #else | |
1264 | local_identity = string_sprintf ("%s^%s", if1, helo1); | |
1265 | #endif | |
1266 | ||
1267 | deliver_set_expansions(NULL); | |
1268 | sender_address = save_sender_address; | |
1269 | ||
1270 | return local_identity; | |
1271 | } | |
1272 | ||
1273 | ||
1274 | ||
1275 | /* This routine is a callback that is called from transport_check_waiting. | |
1276 | This function will evaluate the incoming message versus the previous | |
1277 | message. If the incoming message is using a different local identity then | |
1278 | we will veto this new message. */ | |
1279 | ||
1280 | static BOOL | |
1281 | smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare) | |
1282 | { | |
dadff1d4 HSHR |
1283 | uschar * message_local_identity, |
1284 | * current_local_identity, | |
1285 | * new_sender_address; | |
1286 | ||
1287 | current_local_identity = | |
a39bd74d | 1288 | smtp_local_identity(s_compare->current_sender_address, s_compare->tblock); |
a39bd74d | 1289 | |
dadff1d4 HSHR |
1290 | if (!(new_sender_address = deliver_get_sender_address(message_id))) |
1291 | return 0; | |
1292 | ||
1293 | message_local_identity = | |
1294 | smtp_local_identity(new_sender_address, s_compare->tblock); | |
a39bd74d JB |
1295 | |
1296 | return Ustrcmp(current_local_identity, message_local_identity) == 0; | |
1297 | } | |
1298 | ||
1299 | ||
1300 | ||
e9166683 JH |
1301 | static uschar |
1302 | ehlo_response(uschar * buf, uschar checks) | |
9094b84b | 1303 | { |
e9166683 JH |
1304 | size_t bsize = Ustrlen(buf); |
1305 | ||
9094b84b | 1306 | #ifdef SUPPORT_TLS |
ff5aac2b JH |
1307 | if ( checks & PEER_OFFERED_TLS |
1308 | && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1309 | checks &= ~PEER_OFFERED_TLS; | |
9094b84b JH |
1310 | #endif |
1311 | ||
ff5aac2b JH |
1312 | if ( checks & PEER_OFFERED_IGNQ |
1313 | && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0, | |
1314 | PCRE_EOPT, NULL, 0) < 0) | |
1315 | checks &= ~PEER_OFFERED_IGNQ; | |
9094b84b | 1316 | |
f98442df JH |
1317 | if ( checks & PEER_OFFERED_CHUNKING |
1318 | && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1319 | checks &= ~PEER_OFFERED_CHUNKING; | |
1320 | ||
9094b84b | 1321 | #ifndef DISABLE_PRDR |
ff5aac2b JH |
1322 | if ( checks & PEER_OFFERED_PRDR |
1323 | && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1324 | checks &= ~PEER_OFFERED_PRDR; | |
9094b84b JH |
1325 | #endif |
1326 | ||
1327 | #ifdef SUPPORT_I18N | |
ff5aac2b JH |
1328 | if ( checks & PEER_OFFERED_UTF8 |
1329 | && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1330 | checks &= ~PEER_OFFERED_UTF8; | |
9094b84b JH |
1331 | #endif |
1332 | ||
ff5aac2b JH |
1333 | if ( checks & PEER_OFFERED_DSN |
1334 | && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1335 | checks &= ~PEER_OFFERED_DSN; | |
9094b84b | 1336 | |
ff5aac2b JH |
1337 | if ( checks & PEER_OFFERED_PIPE |
1338 | && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0, | |
1339 | PCRE_EOPT, NULL, 0) < 0) | |
1340 | checks &= ~PEER_OFFERED_PIPE; | |
9094b84b | 1341 | |
ff5aac2b JH |
1342 | if ( checks & PEER_OFFERED_SIZE |
1343 | && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0) | |
1344 | checks &= ~PEER_OFFERED_SIZE; | |
9094b84b JH |
1345 | |
1346 | return checks; | |
1347 | } | |
1348 | ||
1349 | ||
6d5c916c JH |
1350 | |
1351 | /* Callback for emitting a BDAT data chunk header. | |
6d5c916c | 1352 | |
e027f545 JH |
1353 | If given a nonzero size, first flush any buffered SMTP commands |
1354 | then emit the command. | |
1355 | ||
d2aa036b JH |
1356 | Reap previous SMTP command responses if requested, and always reap |
1357 | the response from a previous BDAT command. | |
1358 | ||
1359 | Args: | |
1360 | tctx transport context | |
1361 | chunk_size value for SMTP BDAT command | |
1362 | flags | |
1363 | tc_chunk_last add LAST option to SMTP BDAT command | |
1364 | tc_reap_prev reap response to previous SMTP commands | |
6d5c916c JH |
1365 | |
1366 | Returns: OK or ERROR | |
1367 | */ | |
1368 | ||
1369 | static int | |
d2aa036b JH |
1370 | smtp_chunk_cmd_callback(transport_ctx * tctx, unsigned chunk_size, |
1371 | unsigned flags) | |
6d5c916c JH |
1372 | { |
1373 | smtp_transport_options_block * ob = | |
1374 | (smtp_transport_options_block *)(tctx->tblock->options_block); | |
e9166683 | 1375 | smtp_context * sx = tctx->smtp_context; |
e027f545 JH |
1376 | int cmd_count = 0; |
1377 | int prev_cmd_count; | |
6d5c916c | 1378 | |
4e910c01 JH |
1379 | /* Write SMTP chunk header command. If not reaping responses, note that |
1380 | there may be more writes (like, the chunk data) done soon. */ | |
6d5c916c | 1381 | |
e027f545 | 1382 | if (chunk_size > 0) |
87cb4a16 | 1383 | { |
4e910c01 JH |
1384 | if((cmd_count = smtp_write_command(&sx->outblock, |
1385 | flags & tc_reap_prev ? SCMD_FLUSH : SCMD_MORE, | |
1386 | "BDAT %u%s\r\n", chunk_size, flags & tc_chunk_last ? " LAST" : "") | |
e027f545 | 1387 | ) < 0) return ERROR; |
87cb4a16 JH |
1388 | if (flags & tc_chunk_last) |
1389 | data_command = string_copy(big_buffer); /* Save for later error message */ | |
1390 | } | |
e027f545 | 1391 | |
e9166683 | 1392 | prev_cmd_count = cmd_count += sx->cmd_count; |
6d5c916c | 1393 | |
e027f545 | 1394 | /* Reap responses for any previous, but not one we just emitted */ |
6d5c916c | 1395 | |
e027f545 JH |
1396 | if (chunk_size > 0) |
1397 | prev_cmd_count--; | |
e9166683 | 1398 | if (sx->pending_BDAT) |
e027f545 | 1399 | prev_cmd_count--; |
6d5c916c | 1400 | |
e027f545 | 1401 | if (flags & tc_reap_prev && prev_cmd_count > 0) |
6d5c916c | 1402 | { |
58fc5fb2 JH |
1403 | DEBUG(D_transport) debug_printf("look for %d responses" |
1404 | " for previous pipelined cmds\n", prev_cmd_count); | |
6d5c916c | 1405 | |
e9166683 | 1406 | switch(sync_responses(sx, prev_cmd_count, 0)) |
e027f545 JH |
1407 | { |
1408 | case 1: /* 2xx (only) => OK */ | |
e9166683 JH |
1409 | case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */ |
1410 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e027f545 JH |
1411 | case 0: break; /* No 2xx or 5xx, but no probs */ |
1412 | ||
1413 | case -1: /* Timeout on RCPT */ | |
1414 | default: return ERROR; /* I/O error, or any MAIL/DATA error */ | |
1415 | } | |
1416 | cmd_count = 1; | |
e9166683 | 1417 | if (!sx->pending_BDAT) |
e027f545 | 1418 | pipelining_active = FALSE; |
6d5c916c | 1419 | } |
e027f545 | 1420 | |
58fc5fb2 | 1421 | /* Reap response for an outstanding BDAT */ |
e027f545 | 1422 | |
e9166683 | 1423 | if (sx->pending_BDAT) |
e027f545 | 1424 | { |
58fc5fb2 JH |
1425 | DEBUG(D_transport) debug_printf("look for one response for BDAT\n"); |
1426 | ||
e9166683 | 1427 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
e027f545 JH |
1428 | ob->command_timeout)) |
1429 | { | |
e9166683 | 1430 | if (errno == 0 && sx->buffer[0] == '4') |
e027f545 JH |
1431 | { |
1432 | errno = ERRNO_DATA4XX; /*XXX does this actually get used? */ | |
36e55f49 | 1433 | sx->addrlist->more_errno |= |
e9166683 | 1434 | ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; |
e027f545 JH |
1435 | } |
1436 | return ERROR; | |
1437 | } | |
1438 | cmd_count--; | |
e9166683 | 1439 | sx->pending_BDAT = FALSE; |
e027f545 JH |
1440 | pipelining_active = FALSE; |
1441 | } | |
1442 | else if (chunk_size > 0) | |
e9166683 | 1443 | sx->pending_BDAT = TRUE; |
e027f545 JH |
1444 | |
1445 | ||
e9166683 | 1446 | sx->cmd_count = cmd_count; |
e027f545 | 1447 | return OK; |
6d5c916c JH |
1448 | } |
1449 | ||
1450 | ||
1451 | ||
0756eb3c | 1452 | /************************************************* |
d093f8e5 | 1453 | * Make connection for given message * |
0756eb3c PH |
1454 | *************************************************/ |
1455 | ||
d093f8e5 JH |
1456 | /* |
1457 | Arguments: | |
1458 | ctx connection context | |
d093f8e5 JH |
1459 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for |
1460 | a second attempt after TLS initialization fails | |
d093f8e5 JH |
1461 | |
1462 | Returns: OK - the connection was made and the delivery attempted; | |
1463 | fd is set in the conn context, tls_out set up. | |
1464 | DEFER - the connection could not be made, or something failed | |
1465 | while setting up the SMTP session, or there was a | |
1466 | non-message-specific error, such as a timeout. | |
1467 | ERROR - helo_data or add_headers or authenticated_sender is | |
1468 | specified for this transport, and the string failed | |
1469 | to expand | |
1470 | */ | |
1471 | int | |
e9166683 | 1472 | smtp_setup_conn(smtp_context * sx, BOOL suppress_tls) |
d093f8e5 JH |
1473 | { |
1474 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) | |
1475 | dns_answer tlsa_dnsa; | |
1476 | #endif | |
1477 | BOOL pass_message = FALSE; | |
d093f8e5 | 1478 | uschar * message = NULL; |
d093f8e5 JH |
1479 | int yield = OK; |
1480 | int rc; | |
1481 | ||
02b41d71 | 1482 | sx->ob = (smtp_transport_options_block *) sx->tblock->options_block; |
d093f8e5 JH |
1483 | |
1484 | sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0; | |
1485 | sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0; | |
1486 | sx->ok = FALSE; | |
1487 | sx->send_rset = TRUE; | |
1488 | sx->send_quit = TRUE; | |
1489 | sx->setting_up = TRUE; | |
1490 | sx->esmtp = TRUE; | |
1491 | sx->esmtp_sent = FALSE; | |
59a286ef | 1492 | #ifdef SUPPORT_I18N |
d093f8e5 | 1493 | sx->utf8_needed = FALSE; |
59a286ef | 1494 | #endif |
d093f8e5 | 1495 | sx->dsn_all_lasthop = TRUE; |
59a286ef | 1496 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
d093f8e5 JH |
1497 | sx->dane = FALSE; |
1498 | sx->dane_required = verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK; | |
1499 | #endif | |
1500 | ||
1501 | if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999; | |
d093f8e5 JH |
1502 | sx->peer_offered = 0; |
1503 | sx->igquotstr = US""; | |
02b41d71 | 1504 | if (!sx->helo_data) sx->helo_data = sx->ob->helo_data; |
d093f8e5 JH |
1505 | #ifdef EXPERIMENTAL_DSN_INFO |
1506 | sx->smtp_greeting = NULL; | |
1507 | sx->helo_response = NULL; | |
59a286ef JH |
1508 | #endif |
1509 | ||
0756eb3c | 1510 | smtp_command = US"initial connection"; |
d093f8e5 | 1511 | sx->buffer[0] = '\0'; |
0756eb3c PH |
1512 | |
1513 | /* Set up the buffer for reading SMTP response packets. */ | |
1514 | ||
d093f8e5 JH |
1515 | sx->inblock.buffer = sx->inbuffer; |
1516 | sx->inblock.buffersize = sizeof(sx->inbuffer); | |
1517 | sx->inblock.ptr = sx->inbuffer; | |
1518 | sx->inblock.ptrend = sx->inbuffer; | |
0756eb3c PH |
1519 | |
1520 | /* Set up the buffer for holding SMTP commands while pipelining */ | |
1521 | ||
d093f8e5 JH |
1522 | sx->outblock.buffer = sx->outbuffer; |
1523 | sx->outblock.buffersize = sizeof(sx->outbuffer); | |
1524 | sx->outblock.ptr = sx->outbuffer; | |
1525 | sx->outblock.cmd_count = 0; | |
1526 | sx->outblock.authenticating = FALSE; | |
0756eb3c | 1527 | |
6c512171 PH |
1528 | /* Reset the parameters of a TLS session. */ |
1529 | ||
817d9f57 JH |
1530 | tls_out.bits = 0; |
1531 | tls_out.cipher = NULL; /* the one we may use for this transport */ | |
9d1c15ef JH |
1532 | tls_out.ourcert = NULL; |
1533 | tls_out.peercert = NULL; | |
817d9f57 JH |
1534 | tls_out.peerdn = NULL; |
1535 | #if defined(SUPPORT_TLS) && !defined(USE_GNUTLS) | |
1536 | tls_out.sni = NULL; | |
5b456975 | 1537 | #endif |
018058b2 | 1538 | tls_out.ocsp = OCSP_NOT_REQ; |
6c512171 | 1539 | |
35aba663 JH |
1540 | /* Flip the legacy TLS-related variables over to the outbound set in case |
1541 | they're used in the context of the transport. Don't bother resetting | |
02b41d71 JH |
1542 | afterward (when being used by a transport) as we're in a subprocess. |
1543 | For verify, unflipped once the callout is dealt with */ | |
35aba663 JH |
1544 | |
1545 | tls_modify_variables(&tls_out); | |
1546 | ||
061b7ebd | 1547 | #ifndef SUPPORT_TLS |
d093f8e5 | 1548 | if (sx->smtps) |
061b7ebd | 1549 | { |
d093f8e5 | 1550 | set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available", |
895fbaf2 | 1551 | DEFER, FALSE); |
018058b2 | 1552 | return ERROR; |
061b7ebd PP |
1553 | } |
1554 | #endif | |
1555 | ||
0756eb3c PH |
1556 | /* Make a connection to the host if this isn't a continued delivery, and handle |
1557 | the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled | |
1558 | specially so they can be identified for retries. */ | |
1559 | ||
58c30e47 | 1560 | if (!continue_hostname) |
0756eb3c | 1561 | { |
e9166683 | 1562 | if (sx->verify) |
02b41d71 JH |
1563 | HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port); |
1564 | ||
58c30e47 | 1565 | /* Get the actual port the connection will use, into sx->host */ |
4311097e | 1566 | |
58c30e47 | 1567 | smtp_port_for_connect(sx->host, sx->port); |
0756eb3c | 1568 | |
0e66b3b6 | 1569 | #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE) |
58c30e47 | 1570 | /* Do TLSA lookup for DANE */ |
0e66b3b6 | 1571 | { |
0e66b3b6 JH |
1572 | tls_out.dane_verified = FALSE; |
1573 | tls_out.tlsa_usage = 0; | |
1574 | ||
d093f8e5 | 1575 | if (sx->host->dnssec == DS_YES) |
0e66b3b6 | 1576 | { |
d093f8e5 JH |
1577 | if( sx->dane_required |
1578 | || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK | |
0e66b3b6 | 1579 | ) |
d093f8e5 | 1580 | switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required)) |
4b0fe319 | 1581 | { |
58c30e47 JH |
1582 | case OK: sx->dane = TRUE; |
1583 | sx->ob->tls_tempfail_tryclear = FALSE; | |
1584 | break; | |
2d5fdd53 | 1585 | case FAIL_FORCED: break; |
d093f8e5 | 1586 | default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
2d5fdd53 JH |
1587 | string_sprintf("DANE error: tlsa lookup %s", |
1588 | rc == DEFER ? "DEFER" : "FAIL"), | |
1589 | rc, FALSE); | |
1590 | return rc; | |
4b0fe319 | 1591 | } |
0e66b3b6 | 1592 | } |
d093f8e5 | 1593 | else if (sx->dane_required) |
0e66b3b6 | 1594 | { |
d093f8e5 JH |
1595 | set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER, |
1596 | string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name), | |
895fbaf2 | 1597 | FAIL, FALSE); |
4b0fe319 | 1598 | return FAIL; |
0e66b3b6 | 1599 | } |
0e66b3b6 JH |
1600 | } |
1601 | #endif /*DANE*/ | |
1602 | ||
58c30e47 JH |
1603 | /* Make the TCP connection */ |
1604 | ||
1605 | sx->inblock.sock = sx->outblock.sock = | |
1606 | smtp_connect(sx->host, sx->host_af, sx->interface, | |
1607 | sx->ob->connect_timeout, sx->tblock); | |
1608 | ||
1609 | if (sx->inblock.sock < 0) | |
1610 | { | |
1611 | uschar * msg = NULL; | |
1612 | if (sx->verify) | |
1613 | { | |
1614 | msg = US strerror(errno); | |
1615 | HDEBUG(D_verify) debug_printf("connect: %s\n", msg); | |
1616 | } | |
1617 | set_errno_nohost(sx->addrlist, | |
1618 | errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno, | |
1619 | sx->verify ? string_sprintf("could not connect: %s", msg) | |
1620 | : NULL, | |
1621 | DEFER, FALSE); | |
1622 | sx->send_quit = FALSE; | |
1623 | return DEFER; | |
1624 | } | |
1625 | ||
41c7c167 PH |
1626 | /* Expand the greeting message while waiting for the initial response. (Makes |
1627 | sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is | |
1628 | delayed till here so that $sending_interface and $sending_port are set. */ | |
1629 | ||
02b41d71 JH |
1630 | if (sx->helo_data) |
1631 | if (!(sx->helo_data = expand_string(sx->helo_data))) | |
e9166683 | 1632 | if (sx->verify) |
02b41d71 JH |
1633 | log_write(0, LOG_MAIN|LOG_PANIC, |
1634 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1635 | sx->addrlist->address, expand_string_message); | |
1636 | ||
8c5d388a | 1637 | #ifdef SUPPORT_I18N |
d093f8e5 | 1638 | if (sx->helo_data) |
810d16ad | 1639 | { |
02b41d71 JH |
1640 | expand_string_message = NULL; |
1641 | if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data, | |
1642 | &expand_string_message)), | |
1643 | expand_string_message) | |
e9166683 | 1644 | if (sx->verify) |
02b41d71 JH |
1645 | log_write(0, LOG_MAIN|LOG_PANIC, |
1646 | "<%s>: failed to expand transport's helo_data value for callout: %s", | |
1647 | sx->addrlist->address, expand_string_message); | |
1648 | else | |
1649 | sx->helo_data = NULL; | |
810d16ad JH |
1650 | } |
1651 | #endif | |
41c7c167 | 1652 | |
0756eb3c PH |
1653 | /* The first thing is to wait for an initial OK response. The dreaded "goto" |
1654 | is nevertheless a reasonably clean way of programming this kind of logic, | |
1655 | where you want to escape on any error. */ | |
1656 | ||
d093f8e5 | 1657 | if (!sx->smtps) |
061b7ebd | 1658 | { |
8d330698 JH |
1659 | BOOL good_response; |
1660 | ||
1661 | #ifdef TCP_QUICKACK | |
d093f8e5 | 1662 | (void) setsockopt(sx->inblock.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off)); |
8d330698 | 1663 | #endif |
d093f8e5 JH |
1664 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1665 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1666 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1667 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
1668 | #endif |
1669 | if (!good_response) goto RESPONSE_FAILED; | |
0756eb3c | 1670 | |
0cbf2b82 | 1671 | #ifndef DISABLE_EVENT |
b30275b8 | 1672 | { |
805c9d53 | 1673 | uschar * s; |
d093f8e5 JH |
1674 | lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes" |
1675 | : sx->host->dnssec==DS_NO ? US"no" : NULL; | |
1676 | s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer); | |
b30275b8 | 1677 | if (s) |
a7538db1 | 1678 | { |
d093f8e5 | 1679 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, |
b30275b8 | 1680 | string_sprintf("deferred by smtp:connect event expansion: %s", s), |
895fbaf2 | 1681 | DEFER, FALSE); |
a7538db1 JH |
1682 | yield = DEFER; |
1683 | goto SEND_QUIT; | |
1684 | } | |
b30275b8 | 1685 | } |
a7538db1 JH |
1686 | #endif |
1687 | ||
061b7ebd PP |
1688 | /* Now check if the helo_data expansion went well, and sign off cleanly if |
1689 | it didn't. */ | |
41c7c167 | 1690 | |
d093f8e5 | 1691 | if (!sx->helo_data) |
061b7ebd | 1692 | { |
d093f8e5 | 1693 | message = string_sprintf("failed to expand helo_data: %s", |
061b7ebd | 1694 | expand_string_message); |
d093f8e5 | 1695 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); |
061b7ebd PP |
1696 | yield = DEFER; |
1697 | goto SEND_QUIT; | |
1698 | } | |
41c7c167 PH |
1699 | } |
1700 | ||
0756eb3c | 1701 | /** Debugging without sending a message |
d093f8e5 | 1702 | sx->addrlist->transport_return = DEFER; |
0756eb3c PH |
1703 | goto SEND_QUIT; |
1704 | **/ | |
1705 | ||
1706 | /* Errors that occur after this point follow an SMTP command, which is | |
1707 | left in big_buffer by smtp_write_command() for use in error messages. */ | |
1708 | ||
1709 | smtp_command = big_buffer; | |
1710 | ||
1711 | /* Tell the remote who we are... | |
1712 | ||
1713 | February 1998: A convention has evolved that ESMTP-speaking MTAs include the | |
1714 | string "ESMTP" in their greeting lines, so make Exim send EHLO if the | |
1715 | greeting is of this form. The assumption was that the far end supports it | |
1716 | properly... but experience shows that there are some that give 5xx responses, | |
1717 | even though the banner includes "ESMTP" (there's a bloody-minded one that | |
1718 | says "ESMTP not spoken here"). Cope with that case. | |
1719 | ||
1720 | September 2000: Time has passed, and it seems reasonable now to always send | |
1721 | EHLO at the start. It is also convenient to make the change while installing | |
1722 | the TLS stuff. | |
1723 | ||
1724 | July 2003: Joachim Wieland met a broken server that advertises "PIPELINING" | |
1725 | but times out after sending MAIL FROM, RCPT TO and DATA all together. There | |
1726 | would be no way to send out the mails, so there is now a host list | |
1727 | "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the | |
1728 | PIPELINING problem as well. Maybe it can also be useful to cure other | |
1729 | problems with broken servers. | |
1730 | ||
1731 | Exim originally sent "Helo" at this point and ran for nearly a year that way. | |
1732 | Then somebody tried it with a Microsoft mailer... It seems that all other | |
1733 | mailers use upper case for some reason (the RFC is quite clear about case | |
1734 | independence) so, for peace of mind, I gave in. */ | |
1735 | ||
d093f8e5 | 1736 | sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK; |
0756eb3c | 1737 | |
061b7ebd PP |
1738 | /* Alas; be careful, since this goto is not an error-out, so conceivably |
1739 | we might set data between here and the target which we assume to exist | |
1740 | and be usable. I can see this coming back to bite us. */ | |
a7538db1 | 1741 | #ifdef SUPPORT_TLS |
d093f8e5 | 1742 | if (sx->smtps) |
061b7ebd | 1743 | { |
2d14f397 | 1744 | smtp_peer_options |= PEER_OFFERED_TLS; |
061b7ebd | 1745 | suppress_tls = FALSE; |
d093f8e5 | 1746 | sx->ob->tls_tempfail_tryclear = FALSE; |
061b7ebd PP |
1747 | smtp_command = US"SSL-on-connect"; |
1748 | goto TLS_NEGOTIATE; | |
1749 | } | |
a7538db1 | 1750 | #endif |
061b7ebd | 1751 | |
d093f8e5 | 1752 | if (sx->esmtp) |
0756eb3c | 1753 | { |
4e910c01 | 1754 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n", |
d093f8e5 | 1755 | sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0) |
0756eb3c | 1756 | goto SEND_FAILED; |
d093f8e5 JH |
1757 | sx->esmtp_sent = TRUE; |
1758 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', | |
1759 | sx->ob->command_timeout)) | |
0756eb3c | 1760 | { |
d093f8e5 | 1761 | if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp) |
895fbaf2 JH |
1762 | { |
1763 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 1764 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
1765 | #endif |
1766 | goto RESPONSE_FAILED; | |
1767 | } | |
d093f8e5 | 1768 | sx->esmtp = FALSE; |
0756eb3c | 1769 | } |
895fbaf2 | 1770 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1771 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 | 1772 | #endif |
0756eb3c PH |
1773 | } |
1774 | else | |
0756eb3c PH |
1775 | DEBUG(D_transport) |
1776 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
0756eb3c | 1777 | |
d093f8e5 | 1778 | if (!sx->esmtp) |
0756eb3c | 1779 | { |
895fbaf2 | 1780 | BOOL good_response; |
d093f8e5 JH |
1781 | int n = sizeof(sx->buffer); |
1782 | uschar * rsp = sx->buffer; | |
a57ce043 | 1783 | |
d093f8e5 JH |
1784 | if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2) |
1785 | { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; } | |
895fbaf2 | 1786 | |
4e910c01 | 1787 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "HELO %s\r\n", sx->helo_data) < 0) |
0756eb3c | 1788 | goto SEND_FAILED; |
d093f8e5 JH |
1789 | good_response = smtp_read_response(&sx->inblock, rsp, n, |
1790 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1791 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1792 | sx->helo_response = string_copy(rsp); |
895fbaf2 | 1793 | #endif |
a57ce043 JH |
1794 | if (!good_response) |
1795 | { | |
1796 | /* Handle special logging for a closed connection after HELO | |
1797 | when had previously sent EHLO */ | |
1798 | ||
d093f8e5 | 1799 | if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET)) |
a57ce043 | 1800 | { |
de6273b4 JH |
1801 | errno = ERRNO_SMTPCLOSED; |
1802 | goto EHLOHELO_FAILED; | |
a57ce043 | 1803 | } |
d093f8e5 | 1804 | Ustrncpy(sx->buffer, rsp, sizeof(sx->buffer)/2); |
a57ce043 JH |
1805 | goto RESPONSE_FAILED; |
1806 | } | |
0756eb3c PH |
1807 | } |
1808 | ||
d093f8e5 | 1809 | sx->peer_offered = smtp_peer_options = 0; |
2d14f397 | 1810 | |
d093f8e5 | 1811 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 1812 | { |
e9166683 | 1813 | sx->peer_offered = ehlo_response(sx->buffer, |
ff5aac2b | 1814 | PEER_OFFERED_TLS /* others checked later */ |
9094b84b | 1815 | ); |
f1513293 | 1816 | |
0756eb3c PH |
1817 | /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */ |
1818 | ||
a7538db1 | 1819 | #ifdef SUPPORT_TLS |
d093f8e5 | 1820 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_TLS; |
7ade712c | 1821 | #endif |
2d14f397 | 1822 | } |
0756eb3c PH |
1823 | } |
1824 | ||
57cc2785 JH |
1825 | /* For continuing deliveries down the same channel, having re-exec'd the socket |
1826 | is the standard input; for a socket held open from verify it is recorded | |
1827 | in the cutthrough context block. Either way we don't need to redo EHLO here | |
1828 | (but may need to do so for TLS - see below). | |
1829 | Set up the pointer to where subsequent commands will be left, for | |
2d14f397 | 1830 | error messages. Note that smtp_peer_options will have been |
0756eb3c PH |
1831 | set from the command line if they were set in the process that passed the |
1832 | connection on. */ | |
1833 | ||
895fbaf2 | 1834 | /*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c |
4c04137d | 1835 | as the continue goes via transport_pass_socket() and doublefork and exec. |
895fbaf2 JH |
1836 | It does not wait. Unclear how we keep separate host's responses |
1837 | separate - we could match up by host ip+port as a bodge. */ | |
1838 | ||
0756eb3c PH |
1839 | else |
1840 | { | |
57cc2785 JH |
1841 | if (cutthrough.fd >= 0 && cutthrough.callout_hold_only) |
1842 | { | |
1843 | sx->inblock.sock = sx->outblock.sock = cutthrough.fd; | |
1844 | sx->host->port = sx->port = cutthrough.host.port; | |
1845 | } | |
1846 | else | |
1847 | { | |
1848 | sx->inblock.sock = sx->outblock.sock = 0; /* stdin */ | |
a843a57e | 1849 | smtp_port_for_connect(sx->host, sx->port); /* Record the port that was used */ |
57cc2785 | 1850 | } |
0756eb3c | 1851 | smtp_command = big_buffer; |
02b41d71 | 1852 | sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */ |
875512a3 | 1853 | |
57cc2785 JH |
1854 | /* For a continued connection with TLS being proxied for us, or a |
1855 | held-open verify connection with TLS, nothing more to do. */ | |
875512a3 | 1856 | |
57cc2785 JH |
1857 | if ( continue_proxy_cipher |
1858 | || (cutthrough.fd >= 0 && cutthrough.callout_hold_only && cutthrough.is_tls) | |
1859 | ) | |
875512a3 JH |
1860 | { |
1861 | sx->peer_offered = smtp_peer_options; | |
1862 | pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE); | |
57cc2785 JH |
1863 | HDEBUG(D_transport) debug_printf("continued connection, %s TLS\n", |
1864 | continue_proxy_cipher ? "proxied" : "verify conn with"); | |
875512a3 JH |
1865 | return OK; |
1866 | } | |
1867 | HDEBUG(D_transport) debug_printf("continued connection, no TLS\n"); | |
0756eb3c PH |
1868 | } |
1869 | ||
1870 | /* If TLS is available on this connection, whether continued or not, attempt to | |
1871 | start up a TLS session, unless the host is in hosts_avoid_tls. If successful, | |
1872 | send another EHLO - the server may give a different answer in secure mode. We | |
1873 | use a separate buffer for reading the response to STARTTLS so that if it is | |
1874 | negative, the original EHLO data is available for subsequent analysis, should | |
1875 | the client not be required to use TLS. If the response is bad, copy the buffer | |
1876 | for error analysis. */ | |
1877 | ||
1878 | #ifdef SUPPORT_TLS | |
2d14f397 | 1879 | if ( smtp_peer_options & PEER_OFFERED_TLS |
5130845b | 1880 | && !suppress_tls |
02b41d71 | 1881 | && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK |
e9166683 | 1882 | && ( !sx->verify |
02b41d71 JH |
1883 | || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK |
1884 | ) ) | |
0756eb3c PH |
1885 | { |
1886 | uschar buffer2[4096]; | |
4e910c01 | 1887 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "STARTTLS\r\n") < 0) |
0756eb3c PH |
1888 | goto SEND_FAILED; |
1889 | ||
1890 | /* If there is an I/O error, transmission of this message is deferred. If | |
1891 | there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is | |
1892 | false, we also defer. However, if there is a temporary rejection of STARTTLS | |
1893 | and tls_tempfail_tryclear is true, or if there is an outright rejection of | |
1894 | STARTTLS, we carry on. This means we will try to send the message in clear, | |
1895 | unless the host is in hosts_require_tls (tested below). */ | |
1896 | ||
d093f8e5 JH |
1897 | if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2', |
1898 | sx->ob->command_timeout)) | |
0756eb3c | 1899 | { |
4b0fe319 JH |
1900 | if ( errno != 0 |
1901 | || buffer2[0] == 0 | |
d093f8e5 | 1902 | || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear) |
4b0fe319 | 1903 | ) |
0dda4340 | 1904 | { |
d093f8e5 | 1905 | Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer)); |
9e7e0f6a | 1906 | sx->buffer[sizeof(sx->buffer)-1] = '\0'; |
0756eb3c | 1907 | goto RESPONSE_FAILED; |
0dda4340 | 1908 | } |
0756eb3c PH |
1909 | } |
1910 | ||
1911 | /* STARTTLS accepted: try to negotiate a TLS session. */ | |
1912 | ||
1913 | else | |
061b7ebd | 1914 | TLS_NEGOTIATE: |
0756eb3c | 1915 | { |
d093f8e5 | 1916 | address_item * addr; |
cf0c6164 JH |
1917 | uschar * errstr; |
1918 | int rc = tls_client_start(sx->inblock.sock, sx->host, sx->addrlist, sx->tblock, | |
0e66b3b6 | 1919 | # ifdef EXPERIMENTAL_DANE |
cf0c6164 | 1920 | sx->dane ? &tlsa_dnsa : NULL, |
0e66b3b6 | 1921 | # endif |
cf0c6164 | 1922 | &errstr); |
0756eb3c PH |
1923 | |
1924 | /* TLS negotiation failed; give an error. From outside, this function may | |
1925 | be called again to try in clear on a new connection, if the options permit | |
1926 | it for this host. */ | |
1927 | ||
1928 | if (rc != OK) | |
1929 | { | |
6ebd79ec | 1930 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 1931 | if (sx->dane) log_write(0, LOG_MAIN, |
cf0c6164 JH |
1932 | "DANE attempt failed; TLS connection to %s [%s]: %s", |
1933 | sx->host->name, sx->host->address, errstr); | |
6ebd79ec JH |
1934 | # endif |
1935 | ||
de6273b4 | 1936 | errno = ERRNO_TLSFAILURE; |
cf0c6164 | 1937 | message = string_sprintf("TLS session: %s", errstr); |
d093f8e5 | 1938 | sx->send_quit = FALSE; |
0756eb3c PH |
1939 | goto TLS_FAILED; |
1940 | } | |
1941 | ||
1942 | /* TLS session is set up */ | |
1943 | ||
2d14f397 | 1944 | smtp_peer_options_wrap = smtp_peer_options; |
d093f8e5 | 1945 | for (addr = sx->addrlist; addr; addr = addr->next) |
5ca2a9a1 PH |
1946 | if (addr->transport_return == PENDING_DEFER) |
1947 | { | |
817d9f57 | 1948 | addr->cipher = tls_out.cipher; |
9d1c15ef JH |
1949 | addr->ourcert = tls_out.ourcert; |
1950 | addr->peercert = tls_out.peercert; | |
817d9f57 | 1951 | addr->peerdn = tls_out.peerdn; |
018058b2 | 1952 | addr->ocsp = tls_out.ocsp; |
5ca2a9a1 | 1953 | } |
0756eb3c PH |
1954 | } |
1955 | } | |
1956 | ||
061b7ebd PP |
1957 | /* if smtps, we'll have smtp_command set to something else; always safe to |
1958 | reset it here. */ | |
1959 | smtp_command = big_buffer; | |
1960 | ||
41c7c167 PH |
1961 | /* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If |
1962 | helo_data is null, we are dealing with a connection that was passed from | |
1963 | another process, and so we won't have expanded helo_data above. We have to | |
1964 | expand it here. $sending_ip_address and $sending_port are set up right at the | |
1965 | start of the Exim process (in exim.c). */ | |
0756eb3c | 1966 | |
817d9f57 | 1967 | if (tls_out.active >= 0) |
0756eb3c | 1968 | { |
061b7ebd | 1969 | char *greeting_cmd; |
895fbaf2 JH |
1970 | BOOL good_response; |
1971 | ||
d093f8e5 | 1972 | if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data))) |
41c7c167 | 1973 | { |
d093f8e5 JH |
1974 | uschar *message = string_sprintf("failed to expand helo_data: %s", |
1975 | expand_string_message); | |
1976 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE); | |
1977 | yield = DEFER; | |
1978 | goto SEND_QUIT; | |
41c7c167 PH |
1979 | } |
1980 | ||
0d0e4455 | 1981 | /* For SMTPS we need to wait for the initial OK response. */ |
d093f8e5 | 1982 | if (sx->smtps) |
061b7ebd | 1983 | { |
d093f8e5 JH |
1984 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
1985 | '2', sx->ob->command_timeout); | |
895fbaf2 | 1986 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 1987 | sx->smtp_greeting = string_copy(sx->buffer); |
895fbaf2 JH |
1988 | #endif |
1989 | if (!good_response) goto RESPONSE_FAILED; | |
0d0e4455 PP |
1990 | } |
1991 | ||
d093f8e5 | 1992 | if (sx->esmtp) |
0d0e4455 PP |
1993 | greeting_cmd = "EHLO"; |
1994 | else | |
1995 | { | |
1996 | greeting_cmd = "HELO"; | |
1997 | DEBUG(D_transport) | |
1998 | debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n"); | |
061b7ebd PP |
1999 | } |
2000 | ||
4e910c01 | 2001 | if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n", |
d093f8e5 | 2002 | sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0) |
0756eb3c | 2003 | goto SEND_FAILED; |
d093f8e5 JH |
2004 | good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), |
2005 | '2', sx->ob->command_timeout); | |
895fbaf2 | 2006 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 2007 | sx->helo_response = string_copy(sx->buffer); |
895fbaf2 JH |
2008 | #endif |
2009 | if (!good_response) goto RESPONSE_FAILED; | |
2d14f397 | 2010 | smtp_peer_options = 0; |
0756eb3c PH |
2011 | } |
2012 | ||
2013 | /* If the host is required to use a secure channel, ensure that we | |
2014 | have one. */ | |
2015 | ||
d093f8e5 | 2016 | else if ( sx->smtps |
0e66b3b6 | 2017 | # ifdef EXPERIMENTAL_DANE |
d093f8e5 | 2018 | || sx->dane |
0e66b3b6 | 2019 | # endif |
d093f8e5 | 2020 | || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK |
7a31d643 | 2021 | ) |
0756eb3c | 2022 | { |
de6273b4 | 2023 | errno = ERRNO_TLSREQUIRED; |
c562fd30 | 2024 | message = string_sprintf("a TLS session is required, but %s", |
2d14f397 JH |
2025 | smtp_peer_options & PEER_OFFERED_TLS |
2026 | ? "an attempt to start TLS failed" : "the server did not offer TLS support"); | |
0756eb3c PH |
2027 | goto TLS_FAILED; |
2028 | } | |
0e66b3b6 | 2029 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
2030 | |
2031 | /* If TLS is active, we have just started it up and re-done the EHLO command, | |
2032 | so its response needs to be analyzed. If TLS is not active and this is a | |
2033 | continued session down a previously-used socket, we haven't just done EHLO, so | |
2034 | we skip this. */ | |
2035 | ||
2036 | if (continue_hostname == NULL | |
a7538db1 | 2037 | #ifdef SUPPORT_TLS |
817d9f57 | 2038 | || tls_out.active >= 0 |
a7538db1 | 2039 | #endif |
0756eb3c PH |
2040 | ) |
2041 | { | |
d093f8e5 | 2042 | if (sx->esmtp || sx->lmtp) |
2d14f397 | 2043 | { |
e9166683 | 2044 | sx->peer_offered = ehlo_response(sx->buffer, |
d093f8e5 JH |
2045 | 0 /* no TLS */ |
2046 | | (sx->lmtp && sx->ob->lmtp_ignore_quota ? PEER_OFFERED_IGNQ : 0) | |
2047 | | PEER_OFFERED_CHUNKING | |
2048 | | PEER_OFFERED_PRDR | |
9094b84b | 2049 | #ifdef SUPPORT_I18N |
d093f8e5 JH |
2050 | | (sx->addrlist->prop.utf8_msg ? PEER_OFFERED_UTF8 : 0) |
2051 | /*XXX if we hand peercaps on to continued-conn processes, | |
2052 | must not depend on this addr */ | |
9094b84b | 2053 | #endif |
d093f8e5 JH |
2054 | | PEER_OFFERED_DSN |
2055 | | PEER_OFFERED_PIPE | |
2056 | | (sx->ob->size_addition >= 0 ? PEER_OFFERED_SIZE : 0) | |
9094b84b JH |
2057 | ); |
2058 | ||
2d14f397 JH |
2059 | /* Set for IGNOREQUOTA if the response to LHLO specifies support and the |
2060 | lmtp_ignore_quota option was set. */ | |
f1513293 | 2061 | |
d093f8e5 | 2062 | sx->igquotstr = sx->peer_offered & PEER_OFFERED_IGNQ ? US" IGNOREQUOTA" : US""; |
f1513293 | 2063 | |
2d14f397 JH |
2064 | /* If the response to EHLO specified support for the SIZE parameter, note |
2065 | this, provided size_addition is non-negative. */ | |
f1513293 | 2066 | |
d093f8e5 | 2067 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_SIZE; |
0756eb3c | 2068 | |
2d14f397 JH |
2069 | /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched |
2070 | the current host, esmtp will be false, so PIPELINING can never be used. If | |
2071 | the current host matches hosts_avoid_pipelining, don't do it. */ | |
0756eb3c | 2072 | |
d093f8e5 JH |
2073 | if ( sx->peer_offered & PEER_OFFERED_PIPE |
2074 | && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK) | |
2d14f397 | 2075 | smtp_peer_options |= PEER_OFFERED_PIPE; |
0756eb3c | 2076 | |
2d14f397 JH |
2077 | DEBUG(D_transport) debug_printf("%susing PIPELINING\n", |
2078 | smtp_peer_options & PEER_OFFERED_PIPE ? "" : "not "); | |
0756eb3c | 2079 | |
d093f8e5 JH |
2080 | if ( sx->peer_offered & PEER_OFFERED_CHUNKING |
2081 | && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK) | |
2082 | sx->peer_offered &= ~PEER_OFFERED_CHUNKING; | |
f98442df | 2083 | |
d093f8e5 | 2084 | if (sx->peer_offered & PEER_OFFERED_CHUNKING) |
2d14f397 | 2085 | {DEBUG(D_transport) debug_printf("CHUNKING usable\n");} |
0756eb3c | 2086 | |
8ccd00b1 | 2087 | #ifndef DISABLE_PRDR |
d093f8e5 JH |
2088 | if ( sx->peer_offered & PEER_OFFERED_PRDR |
2089 | && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK) | |
2090 | sx->peer_offered &= ~PEER_OFFERED_PRDR; | |
fd98a5c6 | 2091 | |
d093f8e5 | 2092 | if (sx->peer_offered & PEER_OFFERED_PRDR) |
2d14f397 | 2093 | {DEBUG(D_transport) debug_printf("PRDR usable\n");} |
fd98a5c6 JH |
2094 | #endif |
2095 | ||
2d14f397 | 2096 | /* Note if the server supports DSN */ |
d093f8e5 | 2097 | smtp_peer_options |= sx->peer_offered & PEER_OFFERED_DSN; |
2d14f397 | 2098 | DEBUG(D_transport) debug_printf("%susing DSN\n", |
d093f8e5 | 2099 | sx->peer_offered & PEER_OFFERED_DSN ? "" : "not "); |
6c1c3d1d | 2100 | |
2d14f397 JH |
2101 | /* Note if the response to EHLO specifies support for the AUTH extension. |
2102 | If it has, check that this host is one we want to authenticate to, and do | |
2103 | the business. The host name and address must be available when the | |
2104 | authenticator's client driver is running. */ | |
0756eb3c | 2105 | |
d093f8e5 JH |
2106 | switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host, |
2107 | sx->ob, sx->esmtp, &sx->inblock, &sx->outblock)) | |
2d14f397 JH |
2108 | { |
2109 | default: goto SEND_QUIT; | |
2110 | case OK: break; | |
2111 | case FAIL_SEND: goto SEND_FAILED; | |
2112 | case FAIL: goto RESPONSE_FAILED; | |
2113 | } | |
0756eb3c PH |
2114 | } |
2115 | } | |
2d14f397 | 2116 | pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE); |
0756eb3c PH |
2117 | |
2118 | /* The setting up of the SMTP call is now complete. Any subsequent errors are | |
2119 | message-specific. */ | |
2120 | ||
d093f8e5 | 2121 | sx->setting_up = FALSE; |
0756eb3c | 2122 | |
8c5d388a | 2123 | #ifdef SUPPORT_I18N |
d093f8e5 | 2124 | if (sx->addrlist->prop.utf8_msg) |
9094b84b | 2125 | { |
d093f8e5 JH |
2126 | sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt |
2127 | && !sx->addrlist->prop.utf8_downcvt_maybe; | |
2128 | DEBUG(D_transport) if (!sx->utf8_needed) | |
59a286ef | 2129 | debug_printf("utf8: %s downconvert\n", |
d093f8e5 | 2130 | sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional"); |
9094b84b JH |
2131 | } |
2132 | ||
7ade712c | 2133 | /* If this is an international message we need the host to speak SMTPUTF8 */ |
d093f8e5 | 2134 | if (sx->utf8_needed && !(sx->peer_offered & PEER_OFFERED_UTF8)) |
7ade712c JH |
2135 | { |
2136 | errno = ERRNO_UTF8_FWD; | |
2137 | goto RESPONSE_FAILED; | |
2138 | } | |
2139 | #endif | |
2140 | ||
d093f8e5 JH |
2141 | return OK; |
2142 | ||
2143 | ||
2144 | { | |
2145 | int code; | |
d093f8e5 JH |
2146 | |
2147 | RESPONSE_FAILED: | |
d093f8e5 | 2148 | message = NULL; |
de6273b4 | 2149 | sx->send_quit = check_response(sx->host, &errno, sx->addrlist->more_errno, |
d093f8e5 JH |
2150 | sx->buffer, &code, &message, &pass_message); |
2151 | goto FAILED; | |
d093f8e5 JH |
2152 | |
2153 | SEND_FAILED: | |
d093f8e5 JH |
2154 | code = '4'; |
2155 | message = US string_sprintf("send() to %s [%s] failed: %s", | |
829dd842 | 2156 | sx->host->name, sx->host->address, strerror(errno)); |
d093f8e5 JH |
2157 | sx->send_quit = FALSE; |
2158 | goto FAILED; | |
d093f8e5 JH |
2159 | |
2160 | /* This label is jumped to directly when a TLS negotiation has failed, | |
2161 | or was not done for a host for which it is required. Values will be set | |
829dd842 | 2162 | in message and errno, and setting_up will always be true. Treat as |
d093f8e5 JH |
2163 | a temporary error. */ |
2164 | ||
de6273b4 JH |
2165 | EHLOHELO_FAILED: |
2166 | code = '4'; | |
2167 | message = string_sprintf("Remote host closed connection in response to %s" | |
2168 | " (EHLO response was: %s)", smtp_command, sx->buffer); | |
2169 | sx->send_quit = FALSE; | |
2170 | goto FAILED; | |
2171 | ||
d093f8e5 JH |
2172 | #ifdef SUPPORT_TLS |
2173 | TLS_FAILED: | |
de6273b4 JH |
2174 | code = '4'; |
2175 | goto FAILED; | |
d093f8e5 JH |
2176 | #endif |
2177 | ||
2178 | /* The failure happened while setting up the call; see if the failure was | |
2179 | a 5xx response (this will either be on connection, or following HELO - a 5xx | |
e69636bc JH |
2180 | after EHLO causes it to try HELO). If so, and there are no more hosts to try, |
2181 | fail all addresses, as this host is never going to accept them. For other | |
2182 | errors during setting up (timeouts or whatever), defer all addresses, and | |
2183 | yield DEFER, so that the host is not tried again for a while. | |
2184 | ||
2185 | XXX This peeking for another host feels like a layering violation. We want | |
2186 | to note the host as unusable, but down here we shouldn't know if this was | |
2187 | the last host to try for the addr(list). Perhaps the upper layer should be | |
2188 | the one to do set_errno() ? The problem is that currently the addr is where | |
2189 | errno etc. are stashed, but until we run out of hosts to try the errors are | |
2190 | host-specific. Maybe we should enhance the host_item definition? */ | |
d093f8e5 | 2191 | |
de6273b4 | 2192 | FAILED: |
d093f8e5 | 2193 | sx->ok = FALSE; /* For when reached by GOTO */ |
e69636bc JH |
2194 | set_errno(sx->addrlist, errno, message, |
2195 | sx->host->next | |
2196 | ? DEFER | |
2197 | : code == '5' | |
d093f8e5 | 2198 | #ifdef SUPPORT_I18N |
e69636bc | 2199 | || errno == ERRNO_UTF8_FWD |
d093f8e5 | 2200 | #endif |
e69636bc JH |
2201 | ? FAIL : DEFER, |
2202 | pass_message, sx->host | |
d093f8e5 JH |
2203 | #ifdef EXPERIMENTAL_DSN_INFO |
2204 | , sx->smtp_greeting, sx->helo_response | |
2205 | #endif | |
2206 | ); | |
e69636bc | 2207 | yield = DEFER; |
d093f8e5 JH |
2208 | } |
2209 | ||
2210 | ||
2211 | SEND_QUIT: | |
2212 | ||
2213 | if (sx->send_quit) | |
4e910c01 | 2214 | (void)smtp_write_command(&sx->outblock, SCMD_FLUSH, "QUIT\r\n"); |
d093f8e5 | 2215 | |
d093f8e5 JH |
2216 | #ifdef SUPPORT_TLS |
2217 | tls_close(FALSE, TRUE); | |
2218 | #endif | |
2219 | ||
2220 | /* Close the socket, and return the appropriate value, first setting | |
2221 | works because the NULL setting is passed back to the calling process, and | |
2222 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
b7d3afcf | 2223 | */ |
d093f8e5 | 2224 | |
e1d04f48 | 2225 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
d093f8e5 JH |
2226 | if (sx->send_quit) |
2227 | { | |
2228 | shutdown(sx->outblock.sock, SHUT_WR); | |
2229 | if (fcntl(sx->inblock.sock, F_SETFL, O_NONBLOCK) == 0) | |
2230 | for (rc = 16; read(sx->inblock.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;) | |
2231 | rc--; /* drain socket */ | |
02b41d71 | 2232 | sx->send_quit = FALSE; |
d093f8e5 JH |
2233 | } |
2234 | (void)close(sx->inblock.sock); | |
02b41d71 | 2235 | sx->inblock.sock = sx->outblock.sock = -1; |
d093f8e5 JH |
2236 | |
2237 | #ifndef DISABLE_EVENT | |
2238 | (void) event_raise(sx->tblock->event_action, US"tcp:close", NULL); | |
2239 | #endif | |
2240 | ||
2241 | continue_transport = NULL; | |
2242 | continue_hostname = NULL; | |
2243 | return yield; | |
2244 | } | |
2245 | ||
2246 | ||
9be4572b JH |
2247 | |
2248 | ||
2249 | /* Create the string of options that will be appended to the MAIL FROM: | |
2250 | in the connection context buffer */ | |
2251 | ||
2252 | static int | |
2253 | build_mailcmd_options(smtp_context * sx, address_item * addrlist) | |
2254 | { | |
2255 | uschar * p = sx->buffer; | |
2256 | address_item * addr; | |
2257 | int address_count; | |
2258 | ||
2259 | *p = 0; | |
2260 | ||
2261 | /* If we know the receiving MTA supports the SIZE qualification, | |
2262 | send it, adding something to the message size to allow for imprecision | |
2263 | and things that get added en route. Exim keeps the number of lines | |
2264 | in a message, so we can give an accurate value for the original message, but we | |
2265 | need some additional to handle added headers. (Double "." characters don't get | |
2266 | included in the count.) */ | |
2267 | ||
2268 | if (sx->peer_offered & PEER_OFFERED_SIZE) | |
2269 | { | |
328c5688 JH |
2270 | /*XXX problem here under spool_files_wireformat? |
2271 | Or just forget about lines? Or inflate by a fixed proportion? */ | |
2272 | ||
9be4572b JH |
2273 | sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition); |
2274 | while (*p) p++; | |
2275 | } | |
2276 | ||
2277 | #ifndef DISABLE_PRDR | |
2278 | /* If it supports Per-Recipient Data Reponses, and we have omre than one recipient, | |
2279 | request that */ | |
2280 | ||
2281 | sx->prdr_active = FALSE; | |
2282 | if (sx->peer_offered & PEER_OFFERED_PRDR) | |
2283 | for (addr = addrlist; addr; addr = addr->next) | |
2284 | if (addr->transport_return == PENDING_DEFER) | |
2285 | { | |
2286 | for (addr = addr->next; addr; addr = addr->next) | |
2287 | if (addr->transport_return == PENDING_DEFER) | |
2288 | { /* at least two recipients to send */ | |
2289 | sx->prdr_active = TRUE; | |
2290 | sprintf(CS p, " PRDR"); p += 5; | |
2291 | break; | |
2292 | } | |
2293 | break; | |
2294 | } | |
2295 | #endif | |
2296 | ||
2297 | #ifdef SUPPORT_I18N | |
2298 | /* If it supports internationalised messages, and this meesage need that, | |
2299 | request it */ | |
2300 | ||
2301 | if ( sx->peer_offered & PEER_OFFERED_UTF8 | |
2302 | && addrlist->prop.utf8_msg | |
2303 | && !addrlist->prop.utf8_downcvt | |
2304 | ) | |
2305 | Ustrcpy(p, " SMTPUTF8"), p += 9; | |
2306 | #endif | |
2307 | ||
2308 | /* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */ | |
2309 | for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0; | |
2310 | addr && address_count < sx->max_rcpt; | |
2311 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2312 | { | |
2313 | address_count++; | |
2314 | if (!(addr->dsn_flags & rf_dsnlasthop)) | |
2315 | { | |
2316 | sx->dsn_all_lasthop = FALSE; | |
2317 | break; | |
2318 | } | |
2319 | } | |
2320 | ||
2321 | /* Add any DSN flags to the mail command */ | |
2322 | ||
2323 | if (sx->peer_offered & PEER_OFFERED_DSN && !sx->dsn_all_lasthop) | |
2324 | { | |
2325 | if (dsn_ret == dsn_ret_hdrs) | |
2326 | { Ustrcpy(p, " RET=HDRS"); p += 9; } | |
2327 | else if (dsn_ret == dsn_ret_full) | |
2328 | { Ustrcpy(p, " RET=FULL"); p += 9; } | |
2329 | ||
2330 | if (dsn_envid) | |
2331 | { | |
2332 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid); | |
2333 | while (*p) p++; | |
2334 | } | |
2335 | } | |
2336 | ||
2337 | /* If an authenticated_sender override has been specified for this transport | |
2338 | instance, expand it. If the expansion is forced to fail, and there was already | |
2339 | an authenticated_sender for this message, the original value will be used. | |
2340 | Other expansion failures are serious. An empty result is ignored, but there is | |
2341 | otherwise no check - this feature is expected to be used with LMTP and other | |
2342 | cases where non-standard addresses (e.g. without domains) might be required. */ | |
2343 | ||
2344 | if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob)) | |
2345 | return ERROR; | |
2346 | ||
2347 | return OK; | |
2348 | } | |
2349 | ||
2350 | ||
2351 | static void | |
2352 | build_rcptcmd_options(smtp_context * sx, const address_item * addr) | |
2353 | { | |
2354 | uschar * p = sx->buffer; | |
2355 | *p = 0; | |
2356 | ||
2357 | /* Add any DSN flags to the rcpt command */ | |
2358 | ||
2359 | if (sx->peer_offered & PEER_OFFERED_DSN && !(addr->dsn_flags & rf_dsnlasthop)) | |
2360 | { | |
2361 | if (addr->dsn_flags & rf_dsnflags) | |
2362 | { | |
2363 | int i; | |
2364 | BOOL first = TRUE; | |
2365 | ||
2366 | Ustrcpy(p, " NOTIFY="); | |
2367 | while (*p) p++; | |
2368 | for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i]) | |
2369 | { | |
2370 | if (!first) *p++ = ','; | |
2371 | first = FALSE; | |
2372 | Ustrcpy(p, rf_names[i]); | |
2373 | while (*p) p++; | |
2374 | } | |
2375 | } | |
2376 | ||
2377 | if (addr->dsn_orcpt) | |
2378 | { | |
2379 | string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s", | |
2380 | addr->dsn_orcpt); | |
2381 | while (*p) p++; | |
2382 | } | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | ||
d9c3c8ed JH |
2387 | |
2388 | /* | |
2389 | Return: | |
e9166683 JH |
2390 | 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL) |
2391 | -1 MAIL response error | |
2392 | -2 any non-MAIL read i/o error | |
2393 | -3 non-MAIL response timeout | |
2394 | -4 internal error; channel still usable | |
2395 | -5 transmit failed | |
d9c3c8ed JH |
2396 | */ |
2397 | ||
2398 | int | |
2399 | smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield) | |
2400 | { | |
2401 | address_item * addr; | |
2402 | int address_count; | |
2403 | int rc; | |
2404 | ||
2405 | if (build_mailcmd_options(sx, sx->first_addr) != OK) | |
2406 | { | |
2407 | *yield = ERROR; | |
e9166683 | 2408 | return -4; |
d9c3c8ed JH |
2409 | } |
2410 | ||
2411 | /* From here until we send the DATA command, we can make use of PIPELINING | |
2412 | if the server host supports it. The code has to be able to check the responses | |
2413 | at any point, for when the buffer fills up, so we write it totally generally. | |
2414 | When PIPELINING is off, each command written reports that it has flushed the | |
2415 | buffer. */ | |
2416 | ||
2417 | sx->pending_MAIL = TRUE; /* The block starts with MAIL */ | |
2418 | ||
2419 | { | |
2420 | uschar * s = sx->from_addr; | |
2421 | #ifdef SUPPORT_I18N | |
2422 | uschar * errstr = NULL; | |
2423 | ||
2424 | /* If we must downconvert, do the from-address here. Remember we had to | |
2425 | for the to-addresses (done below), and also (ugly) for re-doing when building | |
2426 | the delivery log line. */ | |
2427 | ||
2428 | if ( sx->addrlist->prop.utf8_msg | |
2429 | && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & PEER_OFFERED_UTF8)) | |
2430 | ) | |
2431 | { | |
2432 | if (s = string_address_utf8_to_alabel(s, &errstr), errstr) | |
2433 | { | |
2434 | set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE); | |
2435 | *yield = ERROR; | |
e9166683 | 2436 | return -4; |
d9c3c8ed JH |
2437 | } |
2438 | setflag(sx->addrlist, af_utf8_downcvt); | |
2439 | } | |
2440 | #endif | |
2441 | ||
4e910c01 | 2442 | rc = smtp_write_command(&sx->outblock, pipelining_active ? SCMD_BUFFER : SCMD_FLUSH, |
d9c3c8ed JH |
2443 | "MAIL FROM:<%s>%s\r\n", s, sx->buffer); |
2444 | } | |
2445 | ||
2446 | mail_command = string_copy(big_buffer); /* Save for later error message */ | |
2447 | ||
2448 | switch(rc) | |
2449 | { | |
2450 | case -1: /* Transmission error */ | |
e9166683 | 2451 | return -5; |
d9c3c8ed | 2452 | |
df5b41e3 | 2453 | case +1: /* Cmd was sent */ |
d9c3c8ed JH |
2454 | if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', |
2455 | sx->ob->command_timeout)) | |
2456 | { | |
2457 | if (errno == 0 && sx->buffer[0] == '4') | |
2458 | { | |
2459 | errno = ERRNO_MAIL4XX; | |
2460 | sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8; | |
2461 | } | |
2462 | return -1; | |
2463 | } | |
2464 | sx->pending_MAIL = FALSE; | |
2465 | break; | |
e9166683 JH |
2466 | |
2467 | /* otherwise zero: command queued for pipeline */ | |
d9c3c8ed JH |
2468 | } |
2469 | ||
2470 | /* Pass over all the relevant recipient addresses for this host, which are the | |
2471 | ones that have status PENDING_DEFER. If we are using PIPELINING, we can send | |
2472 | several before we have to read the responses for those seen so far. This | |
2473 | checking is done by a subroutine because it also needs to be done at the end. | |
2474 | Send only up to max_rcpt addresses at a time, leaving next_addr pointing to | |
2475 | the next one if not all are sent. | |
2476 | ||
2477 | In the MUA wrapper situation, we want to flush the PIPELINING buffer for the | |
2478 | last address because we want to abort if any recipients have any kind of | |
2479 | problem, temporary or permanent. We know that all recipient addresses will have | |
2480 | the PENDING_DEFER status, because only one attempt is ever made, and we know | |
e9166683 JH |
2481 | that max_rcpt will be large, so all addresses will be done at once. |
2482 | ||
2483 | For verify we flush the pipeline after any (the only) rcpt address. */ | |
d9c3c8ed JH |
2484 | |
2485 | for (addr = sx->first_addr, address_count = 0; | |
2486 | addr && address_count < sx->max_rcpt; | |
2487 | addr = addr->next) if (addr->transport_return == PENDING_DEFER) | |
2488 | { | |
2489 | int count; | |
2490 | BOOL no_flush; | |
2491 | uschar * rcpt_addr; | |
2492 | ||
2493 | addr->dsn_aware = sx->peer_offered & PEER_OFFERED_DSN | |
2494 | ? dsn_support_yes : dsn_support_no; | |
2495 | ||
2496 | address_count++; | |
4c2471ca JH |
2497 | no_flush = pipelining_active && !sx->verify |
2498 | && (!mua_wrapper || addr->next && address_count < sx->max_rcpt); | |
d9c3c8ed JH |
2499 | |
2500 | build_rcptcmd_options(sx, addr); | |
2501 | ||
2502 | /* Now send the RCPT command, and process outstanding responses when | |
2503 | necessary. After a timeout on RCPT, we just end the function, leaving the | |
2504 | yield as OK, because this error can often mean that there is a problem with | |
2505 | just one address, so we don't want to delay the host. */ | |
2506 | ||
2507 | rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes); | |
2508 | ||
2509 | #ifdef SUPPORT_I18N | |
2510 | if ( testflag(sx->addrlist, af_utf8_downcvt) | |
2511 | && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL)) | |
2512 | ) | |
2513 | { | |
2514 | /*XXX could we use a per-address errstr here? Not fail the whole send? */ | |
2515 | errno = ERRNO_EXPANDFAIL; | |
e9166683 | 2516 | return -5; /*XXX too harsh? */ |
d9c3c8ed JH |
2517 | } |
2518 | #endif | |
2519 | ||
4e910c01 JH |
2520 | count = smtp_write_command(&sx->outblock, no_flush ? SCMD_BUFFER : SCMD_FLUSH, |
2521 | "RCPT TO:<%s>%s%s\r\n", rcpt_addr, sx->igquotstr, sx->buffer); | |
d9c3c8ed | 2522 | |
e9166683 | 2523 | if (count < 0) return -5; |
d9c3c8ed JH |
2524 | if (count > 0) |
2525 | { | |
df5b41e3 | 2526 | switch(sync_responses(sx, count, 0)) |
d9c3c8ed JH |
2527 | { |
2528 | case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */ | |
2529 | case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */ | |
e9166683 | 2530 | break; |
d9c3c8ed JH |
2531 | |
2532 | case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ | |
2533 | if (!sx->lmtp) /* can't tell about progress yet */ | |
2534 | sx->completed_addr = TRUE; | |
2535 | case 0: /* No 2xx or 5xx, but no probs */ | |
2536 | break; | |
2537 | ||
e9166683 JH |
2538 | case -1: return -3; /* Timeout on RCPT */ |
2539 | case -2: return -2; /* non-MAIL read i/o error */ | |
2540 | default: return -1; /* any MAIL error */ | |
d9c3c8ed JH |
2541 | } |
2542 | sx->pending_MAIL = FALSE; /* Dealt with MAIL */ | |
2543 | } | |
2544 | } /* Loop for next address */ | |
2545 | ||
2546 | sx->next_addr = addr; | |
2547 | return 0; | |
2548 | } | |
2549 | ||
2550 | ||
875512a3 JH |
2551 | #ifdef SUPPORT_TLS |
2552 | /***************************************************** | |
2553 | * Proxy TLS connection for another transport process * | |
2554 | ******************************************************/ | |
2555 | /* | |
57cc2785 JH |
2556 | Use the given buffer as a staging area, and select on both the given fd |
2557 | and the TLS'd client-fd for data to read (per the coding in ip_recv() and | |
875512a3 JH |
2558 | fd_ready() this is legitimate). Do blocking full-size writes, and reads |
2559 | under a timeout. | |
2560 | ||
2561 | Arguments: | |
57cc2785 JH |
2562 | buf space to use for buffering |
2563 | bufsiz size of buffer | |
875512a3 JH |
2564 | proxy_fd comms to proxied process |
2565 | timeout per-read timeout, seconds | |
2566 | */ | |
2567 | ||
57cc2785 JH |
2568 | void |
2569 | smtp_proxy_tls(uschar * buf, size_t bsize, int proxy_fd, int timeout) | |
875512a3 JH |
2570 | { |
2571 | fd_set fds; | |
2572 | int max_fd = MAX(proxy_fd, tls_out.active) + 1; | |
2573 | int rc, i, fd_bits, nbytes; | |
2574 | ||
2575 | set_process_info("proxying TLS connection for continued transport"); | |
2576 | FD_ZERO(&fds); | |
2577 | FD_SET(tls_out.active, &fds); | |
2578 | FD_SET(proxy_fd, &fds); | |
2579 | ||
2580 | for (fd_bits = 3; fd_bits; ) | |
2581 | { | |
2582 | time_t time_left = timeout; | |
2583 | time_t time_start = time(NULL); | |
2584 | ||
2585 | /* wait for data */ | |
2586 | do | |
2587 | { | |
2588 | struct timeval tv = { time_left, 0 }; | |
2589 | ||
2590 | rc = select(max_fd, (SELECT_ARG2_TYPE *)&fds, NULL, NULL, &tv); | |
2591 | ||
2592 | if (rc < 0 && errno == EINTR) | |
2593 | if ((time_left -= time(NULL) - time_start) > 0) continue; | |
2594 | ||
2595 | if (rc <= 0) | |
2596 | { | |
2597 | DEBUG(D_transport) if (rc == 0) debug_printf("%s: timed out\n", __FUNCTION__); | |
2598 | return; | |
2599 | } | |
2600 | } | |
2601 | while (rc < 0 || !(FD_ISSET(tls_out.active, &fds) || FD_ISSET(proxy_fd, &fds))); | |
2602 | ||
2603 | /* handle inbound data */ | |
2604 | if (FD_ISSET(tls_out.active, &fds)) | |
57cc2785 | 2605 | if ((rc = tls_read(FALSE, buf, bsize)) <= 0) |
875512a3 JH |
2606 | { |
2607 | fd_bits &= ~1; | |
2608 | FD_CLR(tls_out.active, &fds); | |
2609 | shutdown(proxy_fd, SHUT_WR); | |
2610 | } | |
2611 | else | |
2612 | { | |
2613 | for (nbytes = 0; rc - nbytes > 0; nbytes += i) | |
57cc2785 | 2614 | if ((i = write(proxy_fd, buf + nbytes, rc - nbytes)) < 0) return; |
875512a3 JH |
2615 | } |
2616 | else if (fd_bits & 1) | |
2617 | FD_SET(tls_out.active, &fds); | |
2618 | ||
2619 | /* handle outbound data */ | |
2620 | if (FD_ISSET(proxy_fd, &fds)) | |
57cc2785 | 2621 | if ((rc = read(proxy_fd, buf, bsize)) <= 0) |
875512a3 JH |
2622 | { |
2623 | fd_bits &= ~2; | |
2624 | FD_CLR(proxy_fd, &fds); | |
2625 | shutdown(tls_out.active, SHUT_WR); | |
2626 | } | |
2627 | else | |
2628 | { | |
2629 | for (nbytes = 0; rc - nbytes > 0; nbytes += i) | |
925ac8e4 JH |
2630 | if ((i = tls_write(FALSE, buf + nbytes, rc - nbytes, FALSE)) < 0) |
2631 | return; | |
875512a3 JH |
2632 | } |
2633 | else if (fd_bits & 2) | |
2634 | FD_SET(proxy_fd, &fds); | |
2635 | } | |
2636 | } | |
2637 | #endif | |
2638 | ||
2639 | ||
d093f8e5 JH |
2640 | /************************************************* |
2641 | * Deliver address list to given host * | |
2642 | *************************************************/ | |
2643 | ||
2644 | /* If continue_hostname is not null, we get here only when continuing to | |
2645 | deliver down an existing channel. The channel was passed as the standard | |
2646 | input. TLS is never active on a passed channel; the previous process always | |
2647 | closes it down before passing the connection on. | |
2648 | ||
2649 | Otherwise, we have to make a connection to the remote host, and do the | |
2650 | initial protocol exchange. | |
2651 | ||
2652 | When running as an MUA wrapper, if the sender or any recipient is rejected, | |
2653 | temporarily or permanently, we force failure for all recipients. | |
2654 | ||
2655 | Arguments: | |
2656 | addrlist chain of potential addresses to deliver; only those whose | |
2657 | transport_return field is set to PENDING_DEFER are currently | |
2658 | being processed; others should be skipped - they have either | |
2659 | been delivered to an earlier host or IP address, or been | |
2660 | failed by one of them. | |
2661 | host host to deliver to | |
2662 | host_af AF_INET or AF_INET6 | |
a843a57e JH |
2663 | defport default TCP/IP port to use if host does not specify, in host |
2664 | byte order | |
d093f8e5 JH |
2665 | interface interface to bind to, or NULL |
2666 | tblock transport instance block | |
2667 | message_defer set TRUE if yield is OK, but all addresses were deferred | |
2668 | because of a non-recipient, non-host failure, that is, a | |
2669 | 4xx response to MAIL FROM, DATA, or ".". This is a defer | |
2670 | that is specific to the message. | |
2671 | suppress_tls if TRUE, don't attempt a TLS connection - this is set for | |
2672 | a second attempt after TLS initialization fails | |
2673 | ||
2674 | Returns: OK - the connection was made and the delivery attempted; | |
2675 | the result for each address is in its data block. | |
2676 | DEFER - the connection could not be made, or something failed | |
2677 | while setting up the SMTP session, or there was a | |
2678 | non-message-specific error, such as a timeout. | |
2679 | ERROR - a filter command is specified for this transport, | |
2680 | and there was a problem setting it up; OR helo_data | |
2681 | or add_headers or authenticated_sender is specified | |
2682 | for this transport, and the string failed to expand | |
2683 | */ | |
2684 | ||
2685 | static int | |
a843a57e | 2686 | smtp_deliver(address_item *addrlist, host_item *host, int host_af, int defport, |
d093f8e5 JH |
2687 | uschar *interface, transport_instance *tblock, |
2688 | BOOL *message_defer, BOOL suppress_tls) | |
2689 | { | |
2690 | address_item *addr; | |
d093f8e5 | 2691 | int yield = OK; |
d093f8e5 JH |
2692 | int save_errno; |
2693 | int rc; | |
2694 | time_t start_delivery_time = time(NULL); | |
2695 | ||
d093f8e5 JH |
2696 | BOOL pass_message = FALSE; |
2697 | uschar *message = NULL; | |
2698 | uschar new_message_id[MESSAGE_ID_LENGTH + 1]; | |
2699 | uschar *p; | |
2700 | ||
2701 | smtp_context sx; | |
2702 | ||
2703 | suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */ | |
02b41d71 | 2704 | *message_defer = FALSE; |
d093f8e5 JH |
2705 | |
2706 | sx.addrlist = addrlist; | |
2707 | sx.host = host; | |
2708 | sx.host_af = host_af, | |
a843a57e | 2709 | sx.port = defport; |
d093f8e5 | 2710 | sx.interface = interface; |
02b41d71 | 2711 | sx.helo_data = NULL; |
d093f8e5 | 2712 | sx.tblock = tblock; |
e9166683 | 2713 | sx.verify = FALSE; |
d093f8e5 | 2714 | |
9be4572b JH |
2715 | /* Get the channel set up ready for a message (MAIL FROM being the next |
2716 | SMTP command to send */ | |
2717 | ||
e9166683 | 2718 | if ((rc = smtp_setup_conn(&sx, suppress_tls)) != OK) |
d093f8e5 JH |
2719 | return rc; |
2720 | ||
0756eb3c PH |
2721 | /* If there is a filter command specified for this transport, we can now |
2722 | set it up. This cannot be done until the identify of the host is known. */ | |
2723 | ||
e9166683 | 2724 | if (tblock->filter_command) |
0756eb3c | 2725 | { |
9b989985 | 2726 | transport_filter_timeout = tblock->filter_timeout; |
0756eb3c PH |
2727 | |
2728 | /* On failure, copy the error to all addresses, abandon the SMTP call, and | |
2729 | yield ERROR. */ | |
2730 | ||
36d295f1 JH |
2731 | if (!transport_set_up_command(&transport_filter_argv, |
2732 | tblock->filter_command, TRUE, DEFER, addrlist, | |
2733 | string_sprintf("%.50s transport", tblock->name), NULL)) | |
0756eb3c | 2734 | { |
895fbaf2 JH |
2735 | set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER, |
2736 | FALSE); | |
0756eb3c PH |
2737 | yield = ERROR; |
2738 | goto SEND_QUIT; | |
2739 | } | |
48f1c853 JH |
2740 | |
2741 | if ( transport_filter_argv | |
2742 | && *transport_filter_argv | |
2743 | && **transport_filter_argv | |
d093f8e5 | 2744 | && sx.peer_offered & PEER_OFFERED_CHUNKING |
48f1c853 JH |
2745 | ) |
2746 | { | |
d093f8e5 | 2747 | sx.peer_offered &= ~PEER_OFFERED_CHUNKING; |
48f1c853 JH |
2748 | DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n"); |
2749 | } | |
0756eb3c PH |
2750 | } |
2751 | ||
36d295f1 | 2752 | sx.first_addr = addrlist; |
0756eb3c PH |
2753 | |
2754 | /* For messages that have more than the maximum number of envelope recipients, | |
2755 | we want to send several transactions down the same SMTP connection. (See | |
2756 | comments in deliver.c as to how this reconciles, heuristically, with | |
2757 | remote_max_parallel.) This optimization was added to Exim after the following | |
2758 | code was already working. The simplest way to put it in without disturbing the | |
2759 | code was to use a goto to jump back to this point when there is another | |
2760 | transaction to handle. */ | |
2761 | ||
2762 | SEND_MESSAGE: | |
d9c3c8ed | 2763 | sx.from_addr = return_path; |
36d295f1 | 2764 | sx.sync_addr = sx.first_addr; |
d093f8e5 JH |
2765 | sx.ok = FALSE; |
2766 | sx.send_rset = TRUE; | |
d9c3c8ed | 2767 | sx.completed_addr = FALSE; |
0756eb3c PH |
2768 | |
2769 | ||
57cc2785 JH |
2770 | /* If we are a continued-connection-after-verify the MAIL and RCPT |
2771 | commands were already sent; do not re-send but do mark the addrs as | |
2772 | having been accepted up to RCPT stage. A traditional cont-conn | |
2773 | always has a sequence number greater than one. */ | |
6b62e899 | 2774 | |
57cc2785 | 2775 | if (continue_hostname && continue_sequence == 1) |
0756eb3c | 2776 | { |
57cc2785 | 2777 | address_item * addr; |
0756eb3c | 2778 | |
57cc2785 | 2779 | sx.peer_offered = smtp_peer_options; |
d8b8dd15 | 2780 | sx.pending_MAIL = FALSE; |
57cc2785 JH |
2781 | sx.ok = TRUE; |
2782 | sx.next_addr = NULL; | |
0756eb3c | 2783 | |
57cc2785 JH |
2784 | for (addr = addrlist; addr; addr = addr->next) |
2785 | addr->transport_return = PENDING_OK; | |
2786 | } | |
2787 | else | |
0756eb3c | 2788 | { |
57cc2785 JH |
2789 | /* Initiate a message transfer. */ |
2790 | ||
2791 | switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield)) | |
2792 | { | |
2793 | case 0: break; | |
2794 | case -1: case -2: goto RESPONSE_FAILED; | |
2795 | case -3: goto END_OFF; | |
2796 | case -4: goto SEND_QUIT; | |
2797 | default: goto SEND_FAILED; | |
2798 | } | |
2799 | ||
2800 | /* If we are an MUA wrapper, abort if any RCPTs were rejected, either | |
2801 | permanently or temporarily. We should have flushed and synced after the last | |
2802 | RCPT. */ | |
2803 | ||
2804 | if (mua_wrapper) | |
2805 | { | |
4c2471ca JH |
2806 | address_item * a; |
2807 | unsigned cnt; | |
2808 | ||
2809 | for (a = sx.first_addr, cnt = 0; a && cnt < sx.max_rcpt; a = a->next, cnt++) | |
2810 | if (a->transport_return != PENDING_OK) | |
57cc2785 JH |
2811 | { |
2812 | /*XXX could we find a better errno than 0 here? */ | |
4c2471ca JH |
2813 | set_errno_nohost(addrlist, 0, a->message, FAIL, |
2814 | testflag(a, af_pass_message)); | |
57cc2785 JH |
2815 | sx.ok = FALSE; |
2816 | break; | |
2817 | } | |
2818 | } | |
0756eb3c PH |
2819 | } |
2820 | ||
2821 | /* If ok is TRUE, we know we have got at least one good recipient, and must now | |
2822 | send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still | |
2823 | have a good recipient buffered up if we are pipelining. We don't want to waste | |
2824 | time sending DATA needlessly, so we only send it if either ok is TRUE or if we | |
6d5c916c JH |
2825 | are pipelining. The responses are all handled by sync_responses(). |
2826 | If using CHUNKING, do not send a BDAT until we know how big a chunk we want | |
2827 | to send is. */ | |
0756eb3c | 2828 | |
d093f8e5 JH |
2829 | if ( !(sx.peer_offered & PEER_OFFERED_CHUNKING) |
2830 | && (sx.ok || (pipelining_active && !mua_wrapper))) | |
0756eb3c | 2831 | { |
4e910c01 | 2832 | int count = smtp_write_command(&sx.outblock, SCMD_FLUSH, "DATA\r\n"); |
6d5c916c | 2833 | |
0756eb3c | 2834 | if (count < 0) goto SEND_FAILED; |
df5b41e3 | 2835 | switch(sync_responses(&sx, count, sx.ok ? +1 : -1)) |
0756eb3c | 2836 | { |
d093f8e5 | 2837 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 2838 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
0756eb3c PH |
2839 | break; |
2840 | ||
d093f8e5 | 2841 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 2842 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
0756eb3c PH |
2843 | case 0: break; /* No 2xx or 5xx, but no probs */ |
2844 | ||
2845 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
2846 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
2847 | } | |
0d9fa8c0 | 2848 | pipelining_active = FALSE; |
87cb4a16 | 2849 | data_command = string_copy(big_buffer); /* Save for later error message */ |
0756eb3c PH |
2850 | } |
2851 | ||
0756eb3c PH |
2852 | /* If there were no good recipients (but otherwise there have been no |
2853 | problems), just set ok TRUE, since we have handled address-specific errors | |
2854 | already. Otherwise, it's OK to send the message. Use the check/escape mechanism | |
2855 | for handling the SMTP dot-handling protocol, flagging to apply to headers as | |
2856 | well as body. Set the appropriate timeout value to be used for each chunk. | |
2857 | (Haven't been able to make it work using select() for writing yet.) */ | |
2858 | ||
d093f8e5 | 2859 | if (!(sx.peer_offered & PEER_OFFERED_CHUNKING) && !sx.ok) |
6d5c916c JH |
2860 | { |
2861 | /* Save the first address of the next batch. */ | |
d9c3c8ed | 2862 | sx.first_addr = sx.next_addr; |
6d5c916c | 2863 | |
d093f8e5 | 2864 | sx.ok = TRUE; |
6d5c916c | 2865 | } |
ff5aac2b | 2866 | else |
0756eb3c | 2867 | { |
6b46ecc6 | 2868 | transport_ctx tctx = { |
42055a33 | 2869 | sx.inblock.sock, |
6b46ecc6 JH |
2870 | tblock, |
2871 | addrlist, | |
2872 | US".", US"..", /* Escaping strings */ | |
65de12cc | 2873 | topt_use_crlf | topt_escape_headers |
6b46ecc6 JH |
2874 | | (tblock->body_only ? topt_no_headers : 0) |
2875 | | (tblock->headers_only ? topt_no_body : 0) | |
2876 | | (tblock->return_path_add ? topt_add_return_path : 0) | |
2877 | | (tblock->delivery_date_add ? topt_add_delivery_date : 0) | |
2878 | | (tblock->envelope_to_add ? topt_add_envelope_to : 0) | |
2879 | }; | |
2880 | ||
6d5c916c JH |
2881 | /* If using CHUNKING we need a callback from the generic transport |
2882 | support to us, for the sending of BDAT smtp commands and the reaping | |
2883 | of responses. The callback needs a whole bunch of state so set up | |
2884 | a transport-context structure to be passed around. */ | |
2885 | ||
d093f8e5 | 2886 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) |
59932f7d | 2887 | { |
65de12cc | 2888 | tctx.check_string = tctx.escape_string = NULL; |
6d5c916c JH |
2889 | tctx.options |= topt_use_bdat; |
2890 | tctx.chunk_cb = smtp_chunk_cmd_callback; | |
e9166683 JH |
2891 | sx.pending_BDAT = FALSE; |
2892 | sx.good_RCPT = sx.ok; | |
2893 | sx.cmd_count = 0; | |
2894 | tctx.smtp_context = &sx; | |
59932f7d JH |
2895 | } |
2896 | else | |
65de12cc | 2897 | tctx.options |= topt_end_dot; |
59932f7d | 2898 | |
6d5c916c | 2899 | /* Save the first address of the next batch. */ |
d9c3c8ed | 2900 | sx.first_addr = sx.next_addr; |
6d5c916c | 2901 | |
e027f545 JH |
2902 | /* Responses from CHUNKING commands go in buffer. Otherwise, |
2903 | there has not been a response. */ | |
2904 | ||
d093f8e5 | 2905 | sx.buffer[0] = 0; |
e027f545 | 2906 | |
0756eb3c | 2907 | sigalrm_seen = FALSE; |
d093f8e5 | 2908 | transport_write_timeout = sx.ob->data_timeout; |
0756eb3c PH |
2909 | smtp_command = US"sending data block"; /* For error messages */ |
2910 | DEBUG(D_transport|D_v) | |
d093f8e5 | 2911 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) |
6d5c916c JH |
2912 | debug_printf(" will write message using CHUNKING\n"); |
2913 | else | |
2914 | debug_printf(" SMTP>> writing message and terminating \".\"\n"); | |
0756eb3c | 2915 | transport_count = 0; |
a7538db1 | 2916 | |
80a47a2c | 2917 | #ifndef DISABLE_DKIM |
42055a33 | 2918 | sx.ok = dkim_transport_write_message(&tctx, &sx.ob->dkim, CUSS &message); |
4cd12fe9 | 2919 | #else |
42055a33 | 2920 | sx.ok = transport_write_message(&tctx, 0); |
4cd12fe9 | 2921 | #endif |
0756eb3c PH |
2922 | |
2923 | /* transport_write_message() uses write() because it is called from other | |
2924 | places to write to non-sockets. This means that under some OS (e.g. Solaris) | |
2925 | it can exit with "Broken pipe" as its error. This really means that the | |
2926 | socket got closed at the far end. */ | |
2927 | ||
2928 | transport_write_timeout = 0; /* for subsequent transports */ | |
2929 | ||
2930 | /* Failure can either be some kind of I/O disaster (including timeout), | |
e027f545 JH |
2931 | or the failure of a transport filter or the expansion of added headers. |
2932 | Or, when CHUNKING, it can be a protocol-detected failure. */ | |
0756eb3c | 2933 | |
d093f8e5 | 2934 | if (!sx.ok) |
b9df1829 JH |
2935 | if (message) goto SEND_FAILED; |
2936 | else goto RESPONSE_FAILED; | |
0756eb3c PH |
2937 | |
2938 | /* We used to send the terminating "." explicitly here, but because of | |
2939 | buffering effects at both ends of TCP/IP connections, you don't gain | |
2940 | anything by keeping it separate, so it might as well go in the final | |
2941 | data buffer for efficiency. This is now done by setting the topt_end_dot | |
2942 | flag above. */ | |
2943 | ||
2944 | smtp_command = US"end of data"; | |
2945 | ||
e9166683 | 2946 | if (sx.peer_offered & PEER_OFFERED_CHUNKING && sx.cmd_count > 1) |
6d5c916c JH |
2947 | { |
2948 | /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */ | |
e9166683 | 2949 | switch(sync_responses(&sx, sx.cmd_count-1, 0)) |
6d5c916c | 2950 | { |
d093f8e5 | 2951 | case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */ |
d9c3c8ed | 2952 | case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */ |
6d5c916c JH |
2953 | break; |
2954 | ||
d093f8e5 | 2955 | case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */ |
d9c3c8ed | 2956 | if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */ |
6d5c916c JH |
2957 | case 0: break; /* No 2xx or 5xx, but no probs */ |
2958 | ||
2959 | case -1: goto END_OFF; /* Timeout on RCPT */ | |
2960 | default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */ | |
2961 | } | |
2962 | } | |
2963 | ||
8ccd00b1 | 2964 | #ifndef DISABLE_PRDR |
fd98a5c6 JH |
2965 | /* For PRDR we optionally get a partial-responses warning |
2966 | * followed by the individual responses, before going on with | |
2967 | * the overall response. If we don't get the warning then deal | |
2968 | * with per non-PRDR. */ | |
d093f8e5 | 2969 | if(sx.prdr_active) |
fd98a5c6 | 2970 | { |
d093f8e5 JH |
2971 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3', |
2972 | sx.ob->final_timeout); | |
2973 | if (!sx.ok && errno == 0) switch(sx.buffer[0]) | |
e027f545 | 2974 | { |
d093f8e5 JH |
2975 | case '2': sx.prdr_active = FALSE; |
2976 | sx.ok = TRUE; | |
e027f545 JH |
2977 | break; |
2978 | case '4': errno = ERRNO_DATA4XX; | |
2979 | addrlist->more_errno |= | |
d093f8e5 | 2980 | ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e027f545 JH |
2981 | break; |
2982 | } | |
fd98a5c6 JH |
2983 | } |
2984 | else | |
2985 | #endif | |
2986 | ||
2987 | /* For non-PRDR SMTP, we now read a single response that applies to the | |
2988 | whole message. If it is OK, then all the addresses have been delivered. */ | |
0756eb3c | 2989 | |
d093f8e5 | 2990 | if (!sx.lmtp) |
e97957bc | 2991 | { |
d093f8e5 JH |
2992 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
2993 | sx.ob->final_timeout); | |
2994 | if (!sx.ok && errno == 0 && sx.buffer[0] == '4') | |
e97957bc PH |
2995 | { |
2996 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 2997 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
e97957bc PH |
2998 | } |
2999 | } | |
0756eb3c PH |
3000 | |
3001 | /* For LMTP, we get back a response for every RCPT command that we sent; | |
3002 | some may be accepted and some rejected. For those that get a response, their | |
3003 | status is fixed; any that are accepted have been handed over, even if later | |
3004 | responses crash - at least, that's how I read RFC 2033. | |
3005 | ||
3006 | If all went well, mark the recipient addresses as completed, record which | |
3007 | host/IPaddress they were delivered to, and cut out RSET when sending another | |
3008 | message down the same channel. Write the completed addresses to the journal | |
3009 | now so that they are recorded in case there is a crash of hardware or | |
3010 | software before the spool gets updated. Also record the final SMTP | |
3011 | confirmation if needed (for SMTP only). */ | |
3012 | ||
d093f8e5 | 3013 | if (sx.ok) |
0756eb3c PH |
3014 | { |
3015 | int flag = '='; | |
3016 | int delivery_time = (int)(time(NULL) - start_delivery_time); | |
3017 | int len; | |
0756eb3c | 3018 | uschar *conf = NULL; |
0d9fa8c0 | 3019 | |
d093f8e5 | 3020 | sx.send_rset = FALSE; |
0d9fa8c0 | 3021 | pipelining_active = FALSE; |
0756eb3c | 3022 | |
0756eb3c PH |
3023 | /* Set up confirmation if needed - applies only to SMTP */ |
3024 | ||
d68218c7 | 3025 | if ( |
0cbf2b82 | 3026 | #ifdef DISABLE_EVENT |
6c6d6e48 | 3027 | LOGGING(smtp_confirmation) && |
a7538db1 | 3028 | #endif |
d093f8e5 | 3029 | !sx.lmtp |
d68218c7 | 3030 | ) |
0756eb3c | 3031 | { |
d093f8e5 | 3032 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 3033 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
d093f8e5 | 3034 | conf = (s == sx.buffer)? (uschar *)string_copy(s) : US s; |
0756eb3c PH |
3035 | } |
3036 | ||
fd98a5c6 | 3037 | /* Process all transported addresses - for LMTP or PRDR, read a status for |
0756eb3c PH |
3038 | each one. */ |
3039 | ||
d9c3c8ed | 3040 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
0756eb3c PH |
3041 | { |
3042 | if (addr->transport_return != PENDING_OK) continue; | |
3043 | ||
3044 | /* LMTP - if the response fails badly (e.g. timeout), use it for all the | |
3045 | remaining addresses. Otherwise, it's a return code for just the one | |
75def545 PH |
3046 | address. For temporary errors, add a retry item for the address so that |
3047 | it doesn't get tried again too soon. */ | |
0756eb3c | 3048 | |
8ccd00b1 | 3049 | #ifndef DISABLE_PRDR |
d093f8e5 | 3050 | if (sx.lmtp || sx.prdr_active) |
fd98a5c6 | 3051 | #else |
d093f8e5 | 3052 | if (sx.lmtp) |
fd98a5c6 | 3053 | #endif |
0756eb3c | 3054 | { |
d093f8e5 JH |
3055 | if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
3056 | sx.ob->final_timeout)) | |
0756eb3c | 3057 | { |
d093f8e5 | 3058 | if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED; |
fd98a5c6 | 3059 | addr->message = string_sprintf( |
8ccd00b1 | 3060 | #ifndef DISABLE_PRDR |
d093f8e5 | 3061 | "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP", |
fd98a5c6 JH |
3062 | #else |
3063 | "LMTP error after %s: %s", | |
3064 | #endif | |
d093f8e5 | 3065 | data_command, string_printing(sx.buffer)); |
75def545 | 3066 | setflag(addr, af_pass_message); /* Allow message to go to user */ |
d093f8e5 | 3067 | if (sx.buffer[0] == '5') |
75def545 PH |
3068 | addr->transport_return = FAIL; |
3069 | else | |
3070 | { | |
e97957bc | 3071 | errno = ERRNO_DATA4XX; |
d093f8e5 | 3072 | addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
75def545 | 3073 | addr->transport_return = DEFER; |
8ccd00b1 | 3074 | #ifndef DISABLE_PRDR |
d093f8e5 | 3075 | if (!sx.prdr_active) |
fd98a5c6 JH |
3076 | #endif |
3077 | retry_add_item(addr, addr->address_retry_key, 0); | |
75def545 | 3078 | } |
0756eb3c PH |
3079 | continue; |
3080 | } | |
d9c3c8ed | 3081 | sx.completed_addr = TRUE; /* NOW we can set this flag */ |
6c6d6e48 | 3082 | if (LOGGING(smtp_confirmation)) |
c0ea85ab | 3083 | { |
d093f8e5 | 3084 | const uschar *s = string_printing(sx.buffer); |
55414b25 | 3085 | /* deconst cast ok here as string_printing was checked to have alloc'n'copied */ |
d093f8e5 | 3086 | conf = (s == sx.buffer) ? US string_copy(s) : US s; |
c0ea85ab | 3087 | } |
0756eb3c PH |
3088 | } |
3089 | ||
3090 | /* SMTP, or success return from LMTP for this address. Pass back the | |
2d280592 | 3091 | actual host that was used. */ |
0756eb3c PH |
3092 | |
3093 | addr->transport_return = OK; | |
3094 | addr->more_errno = delivery_time; | |
d427a7f9 | 3095 | addr->host_used = host; |
0756eb3c PH |
3096 | addr->special_action = flag; |
3097 | addr->message = conf; | |
8ccd00b1 | 3098 | #ifndef DISABLE_PRDR |
d093f8e5 | 3099 | if (sx.prdr_active) addr->flags |= af_prdr_used; |
fd98a5c6 | 3100 | #endif |
d093f8e5 | 3101 | if (sx.peer_offered & PEER_OFFERED_CHUNKING) addr->flags |= af_chunking_used; |
0756eb3c PH |
3102 | flag = '-'; |
3103 | ||
8ccd00b1 | 3104 | #ifndef DISABLE_PRDR |
d093f8e5 | 3105 | if (!sx.prdr_active) |
fd98a5c6 JH |
3106 | #endif |
3107 | { | |
3108 | /* Update the journal. For homonymic addresses, use the base address plus | |
3109 | the transport name. See lots of comments in deliver.c about the reasons | |
3110 | for the complications when homonyms are involved. Just carry on after | |
3111 | write error, as it may prove possible to update the spool file later. */ | |
4d8d62b9 | 3112 | |
fd98a5c6 | 3113 | if (testflag(addr, af_homonym)) |
d093f8e5 | 3114 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); |
fd98a5c6 | 3115 | else |
d093f8e5 | 3116 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); |
4d8d62b9 | 3117 | |
57cc2785 | 3118 | DEBUG(D_deliver) debug_printf("S:journalling %s\n", sx.buffer); |
d093f8e5 JH |
3119 | len = Ustrlen(CS sx.buffer); |
3120 | if (write(journal_fd, sx.buffer, len) != len) | |
fd98a5c6 | 3121 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " |
d093f8e5 | 3122 | "%s: %s", sx.buffer, strerror(errno)); |
fd98a5c6 | 3123 | } |
0756eb3c PH |
3124 | } |
3125 | ||
8ccd00b1 | 3126 | #ifndef DISABLE_PRDR |
d093f8e5 | 3127 | if (sx.prdr_active) |
fd98a5c6 JH |
3128 | { |
3129 | /* PRDR - get the final, overall response. For any non-success | |
3130 | upgrade all the address statuses. */ | |
d093f8e5 JH |
3131 | sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2', |
3132 | sx.ob->final_timeout); | |
3133 | if (!sx.ok) | |
fd98a5c6 | 3134 | { |
d093f8e5 | 3135 | if(errno == 0 && sx.buffer[0] == '4') |
fd98a5c6 JH |
3136 | { |
3137 | errno = ERRNO_DATA4XX; | |
d093f8e5 | 3138 | addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8; |
fd98a5c6 | 3139 | } |
d9c3c8ed | 3140 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
d093f8e5 | 3141 | if (sx.buffer[0] == '5' || addr->transport_return == OK) |
fd98a5c6 JH |
3142 | addr->transport_return = PENDING_OK; /* allow set_errno action */ |
3143 | goto RESPONSE_FAILED; | |
3144 | } | |
3145 | ||
3146 | /* Update the journal, or setup retry. */ | |
d9c3c8ed | 3147 | for (addr = addrlist; addr != sx.first_addr; addr = addr->next) |
fd98a5c6 | 3148 | if (addr->transport_return == OK) |
9be4572b JH |
3149 | { |
3150 | if (testflag(addr, af_homonym)) | |
3151 | sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name); | |
3152 | else | |
3153 | sprintf(CS sx.buffer, "%.500s\n", addr->unique); | |
3154 | ||
3155 | DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer); | |
3156 | len = Ustrlen(CS sx.buffer); | |
3157 | if (write(journal_fd, sx.buffer, len) != len) | |
3158 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for " | |
3159 | "%s: %s", sx.buffer, strerror(errno)); | |
3160 | } | |
3161 | else if (addr->transport_return == DEFER) | |
3162 | retry_add_item(addr, addr->address_retry_key, -2); | |
fd98a5c6 JH |
3163 | } |
3164 | #endif | |
3165 | ||
0756eb3c PH |
3166 | /* Ensure the journal file is pushed out to disk. */ |
3167 | ||
54fc8428 | 3168 | if (EXIMfsync(journal_fd) < 0) |
0756eb3c PH |
3169 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", |
3170 | strerror(errno)); | |
3171 | } | |
3172 | } | |
3173 | ||
3174 | ||
3175 | /* Handle general (not specific to one address) failures here. The value of ok | |
3176 | is used to skip over this code on the falling through case. A timeout causes a | |
3177 | deferral. Other errors may defer or fail according to the response code, and | |
3178 | may set up a special errno value, e.g. after connection chopped, which is | |
3179 | assumed if errno == 0 and there is no text in the buffer. If control reaches | |
3180 | here during the setting up phase (i.e. before MAIL FROM) then always defer, as | |
3181 | the problem is not related to this specific message. */ | |
3182 | ||
d093f8e5 | 3183 | if (!sx.ok) |
0756eb3c | 3184 | { |
895fbaf2 JH |
3185 | int code, set_rc; |
3186 | uschar * set_message; | |
0756eb3c PH |
3187 | |
3188 | RESPONSE_FAILED: | |
895fbaf2 JH |
3189 | { |
3190 | save_errno = errno; | |
3191 | message = NULL; | |
d093f8e5 JH |
3192 | sx.send_quit = check_response(host, &save_errno, addrlist->more_errno, |
3193 | sx.buffer, &code, &message, &pass_message); | |
895fbaf2 JH |
3194 | goto FAILED; |
3195 | } | |
0756eb3c PH |
3196 | |
3197 | SEND_FAILED: | |
895fbaf2 JH |
3198 | { |
3199 | save_errno = errno; | |
3200 | code = '4'; | |
b9df1829 | 3201 | message = string_sprintf("send() to %s [%s] failed: %s", |
c0ad8edf | 3202 | host->name, host->address, message ? message : US strerror(save_errno)); |
d093f8e5 | 3203 | sx.send_quit = FALSE; |
895fbaf2 JH |
3204 | goto FAILED; |
3205 | } | |
0756eb3c | 3206 | |
0756eb3c | 3207 | FAILED: |
9be4572b JH |
3208 | { |
3209 | BOOL message_error; | |
0756eb3c | 3210 | |
9be4572b JH |
3211 | sx.ok = FALSE; /* For when reached by GOTO */ |
3212 | set_message = message; | |
0756eb3c | 3213 | |
e97957bc | 3214 | /* We want to handle timeouts after MAIL or "." and loss of connection after |
0756eb3c | 3215 | "." specially. They can indicate a problem with the sender address or with |
e97957bc PH |
3216 | the contents of the message rather than a real error on the connection. These |
3217 | cases are treated in the same way as a 4xx response. This next bit of code | |
3218 | does the classification. */ | |
0756eb3c | 3219 | |
e97957bc PH |
3220 | switch(save_errno) |
3221 | { | |
3222 | case 0: | |
3223 | case ERRNO_MAIL4XX: | |
3224 | case ERRNO_DATA4XX: | |
250b6871 JH |
3225 | message_error = TRUE; |
3226 | break; | |
0756eb3c | 3227 | |
e97957bc | 3228 | case ETIMEDOUT: |
250b6871 JH |
3229 | message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 || |
3230 | Ustrncmp(smtp_command,"end ",4) == 0; | |
3231 | break; | |
e97957bc PH |
3232 | |
3233 | case ERRNO_SMTPCLOSED: | |
250b6871 JH |
3234 | message_error = Ustrncmp(smtp_command,"end ",4) == 0; |
3235 | break; | |
e97957bc PH |
3236 | |
3237 | default: | |
250b6871 JH |
3238 | message_error = FALSE; |
3239 | break; | |
e97957bc | 3240 | } |
0756eb3c | 3241 | |
e97957bc | 3242 | /* Handle the cases that are treated as message errors. These are: |
0756eb3c | 3243 | |
e97957bc PH |
3244 | (a) negative response or timeout after MAIL |
3245 | (b) negative response after DATA | |
3246 | (c) negative response or timeout or dropped connection after "." | |
250b6871 | 3247 | (d) utf8 support required and not offered |
0756eb3c | 3248 | |
e97957bc PH |
3249 | It won't be a negative response or timeout after RCPT, as that is dealt |
3250 | with separately above. The action in all cases is to set an appropriate | |
3251 | error code for all the addresses, but to leave yield set to OK because the | |
3252 | host itself has not failed. Of course, it might in practice have failed | |
3253 | when we've had a timeout, but if so, we'll discover that at the next | |
3254 | delivery attempt. For a temporary error, set the message_defer flag, and | |
3255 | write to the logs for information if this is not the last host. The error | |
3256 | for the last host will be logged as part of the address's log line. */ | |
3257 | ||
3258 | if (message_error) | |
0756eb3c | 3259 | { |
e97957bc | 3260 | if (mua_wrapper) code = '5'; /* Force hard failure in wrapper mode */ |
e97957bc PH |
3261 | |
3262 | /* If there's an errno, the message contains just the identity of | |
3263 | the host. */ | |
3264 | ||
895fbaf2 JH |
3265 | if (code == '5') |
3266 | set_rc = FAIL; | |
3267 | else /* Anything other than 5 is treated as temporary */ | |
e97957bc | 3268 | { |
895fbaf2 | 3269 | set_rc = DEFER; |
e97957bc PH |
3270 | if (save_errno > 0) |
3271 | message = US string_sprintf("%s: %s", message, strerror(save_errno)); | |
3272 | if (host->next != NULL) log_write(0, LOG_MAIN, "%s", message); | |
c562fd30 | 3273 | msglog_line(host, message); |
e97957bc PH |
3274 | *message_defer = TRUE; |
3275 | } | |
3276 | } | |
3277 | ||
3278 | /* Otherwise, we have an I/O error or a timeout other than after MAIL or | |
3279 | ".", or some other transportation error. We defer all addresses and yield | |
3280 | DEFER, except for the case of failed add_headers expansion, or a transport | |
3281 | filter failure, when the yield should be ERROR, to stop it trying other | |
3282 | hosts. */ | |
3283 | ||
3284 | else | |
3285 | { | |
895fbaf2 | 3286 | set_rc = DEFER; |
e97957bc PH |
3287 | yield = (save_errno == ERRNO_CHHEADER_FAIL || |
3288 | save_errno == ERRNO_FILTER_FAIL)? ERROR : DEFER; | |
0756eb3c PH |
3289 | } |
3290 | } | |
895fbaf2 JH |
3291 | |
3292 | set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host | |
3293 | #ifdef EXPERIMENTAL_DSN_INFO | |
d093f8e5 | 3294 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3295 | #endif |
3296 | ); | |
0756eb3c PH |
3297 | } |
3298 | ||
3299 | ||
3300 | /* If all has gone well, send_quit will be set TRUE, implying we can end the | |
3301 | SMTP session tidily. However, if there were too many addresses to send in one | |
3302 | message (indicated by first_addr being non-NULL) we want to carry on with the | |
3303 | rest of them. Also, it is desirable to send more than one message down the SMTP | |
3304 | connection if there are several waiting, provided we haven't already sent so | |
3305 | many as to hit the configured limit. The function transport_check_waiting looks | |
3306 | for a waiting message and returns its id. Then transport_pass_socket tries to | |
3307 | set up a continued delivery by passing the socket on to another process. The | |
3308 | variable send_rset is FALSE if a message has just been successfully transfered. | |
3309 | ||
3310 | If we are already sending down a continued channel, there may be further | |
3311 | addresses not yet delivered that are aimed at the same host, but which have not | |
3312 | been passed in this run of the transport. In this case, continue_more will be | |
3313 | true, and all we should do is send RSET if necessary, and return, leaving the | |
3314 | channel open. | |
3315 | ||
3316 | However, if no address was disposed of, i.e. all addresses got 4xx errors, we | |
3317 | do not want to continue with other messages down the same channel, because that | |
3318 | can lead to looping between two or more messages, all with the same, | |
3319 | temporarily failing address(es). [The retry information isn't updated yet, so | |
3320 | new processes keep on trying.] We probably also don't want to try more of this | |
3321 | message's addresses either. | |
3322 | ||
3323 | If we have started a TLS session, we have to end it before passing the | |
3324 | connection to a new process. However, not all servers can handle this (Exim | |
3325 | can), so we do not pass such a connection on if the host matches | |
3326 | hosts_nopass_tls. */ | |
3327 | ||
3328 | DEBUG(D_transport) | |
3329 | debug_printf("ok=%d send_quit=%d send_rset=%d continue_more=%d " | |
d093f8e5 | 3330 | "yield=%d first_address is %sNULL\n", sx.ok, sx.send_quit, |
d9c3c8ed | 3331 | sx.send_rset, continue_more, yield, sx.first_addr ? "not " : ""); |
0756eb3c | 3332 | |
d9c3c8ed | 3333 | if (sx.completed_addr && sx.ok && sx.send_quit) |
0756eb3c PH |
3334 | { |
3335 | BOOL more; | |
a39bd74d JB |
3336 | smtp_compare_t t_compare; |
3337 | ||
3338 | t_compare.tblock = tblock; | |
3339 | t_compare.current_sender_address = sender_address; | |
3340 | ||
d9c3c8ed | 3341 | if ( sx.first_addr != NULL |
5130845b | 3342 | || continue_more |
875512a3 JH |
3343 | || ( |
3344 | #ifdef SUPPORT_TLS | |
5013d912 | 3345 | ( tls_out.active < 0 && !continue_proxy_cipher |
d093f8e5 | 3346 | || verify_check_given_host(&sx.ob->hosts_nopass_tls, host) != OK |
5130845b | 3347 | ) |
0756eb3c | 3348 | && |
875512a3 | 3349 | #endif |
0756eb3c | 3350 | transport_check_waiting(tblock->name, host->name, |
a39bd74d JB |
3351 | tblock->connection_max_messages, new_message_id, &more, |
3352 | (oicf)smtp_are_same_identities, (void*)&t_compare) | |
5130845b | 3353 | ) ) |
0756eb3c PH |
3354 | { |
3355 | uschar *msg; | |
447d236c | 3356 | BOOL pass_message; |
0756eb3c | 3357 | |
d093f8e5 | 3358 | if (sx.send_rset) |
4e910c01 | 3359 | if (! (sx.ok = smtp_write_command(&sx.outblock, SCMD_FLUSH, "RSET\r\n") >= 0)) |
0756eb3c PH |
3360 | { |
3361 | msg = US string_sprintf("send() to %s [%s] failed: %s", host->name, | |
9e7e0f6a | 3362 | host->address, strerror(errno)); |
d093f8e5 | 3363 | sx.send_quit = FALSE; |
0756eb3c | 3364 | } |
d093f8e5 JH |
3365 | else if (! (sx.ok = smtp_read_response(&sx.inblock, sx.buffer, |
3366 | sizeof(sx.buffer), '2', sx.ob->command_timeout))) | |
0756eb3c PH |
3367 | { |
3368 | int code; | |
d093f8e5 | 3369 | sx.send_quit = check_response(host, &errno, 0, sx.buffer, &code, &msg, |
447d236c | 3370 | &pass_message); |
d093f8e5 | 3371 | if (!sx.send_quit) |
0756eb3c | 3372 | { |
c562fd30 JH |
3373 | DEBUG(D_transport) debug_printf("H=%s [%s] %s\n", |
3374 | host->name, host->address, msg); | |
0756eb3c PH |
3375 | } |
3376 | } | |
0756eb3c PH |
3377 | |
3378 | /* Either RSET was not needed, or it succeeded */ | |
3379 | ||
d093f8e5 | 3380 | if (sx.ok) |
0756eb3c | 3381 | { |
875512a3 JH |
3382 | int pfd[2]; |
3383 | int socket_fd = sx.inblock.sock; | |
3384 | ||
3385 | ||
3386 | if (sx.first_addr != NULL) /* More addresses still to be sent */ | |
0756eb3c PH |
3387 | { /* in this run of the transport */ |
3388 | continue_sequence++; /* Causes * in logging */ | |
3389 | goto SEND_MESSAGE; | |
3390 | } | |
0756eb3c | 3391 | |
b7d3afcf JH |
3392 | /* Unless caller said it already has more messages listed for this host, |
3393 | pass the connection on to a new Exim process (below, the call to | |
3394 | transport_pass_socket). If the caller has more ready, just return with | |
3395 | the connection still open. */ | |
3396 | ||
a7538db1 | 3397 | #ifdef SUPPORT_TLS |
817d9f57 | 3398 | if (tls_out.active >= 0) |
b7d3afcf JH |
3399 | if ( continue_more |
3400 | || verify_check_given_host(&sx.ob->hosts_noproxy_tls, host) == OK) | |
875512a3 | 3401 | { |
b7d3afcf JH |
3402 | /* Before passing the socket on, or returning to caller with it still |
3403 | open, we must shut down TLS. Not all MTAs allow for the continuation | |
3404 | of the SMTP session when TLS is shut down. We test for this by sending | |
3405 | a new EHLO. If we don't get a good response, we don't attempt to pass | |
3406 | the socket on. */ | |
875512a3 JH |
3407 | |
3408 | tls_close(FALSE, TRUE); | |
3409 | smtp_peer_options = smtp_peer_options_wrap; | |
3410 | sx.ok = !sx.smtps | |
4e910c01 | 3411 | && smtp_write_command(&sx.outblock, SCMD_FLUSH, |
875512a3 JH |
3412 | "EHLO %s\r\n", sx.helo_data) >= 0 |
3413 | && smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), | |
3414 | '2', sx.ob->command_timeout); | |
b7d3afcf JH |
3415 | |
3416 | if (sx.ok && continue_more) | |
3417 | return yield; /* More addresses for another run */ | |
875512a3 JH |
3418 | } |
3419 | else | |
3420 | { | |
3421 | /* Set up a pipe for proxying TLS for the new transport process */ | |
3422 | ||
3423 | smtp_peer_options |= PEER_OFFERED_TLS; | |
fa18eebc | 3424 | if (sx.ok = (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) == 0)) |
875512a3 JH |
3425 | socket_fd = pfd[1]; |
3426 | else | |
3427 | set_errno(sx.first_addr, errno, US"internal allocation problem", | |
3428 | DEFER, FALSE, host | |
3429 | # ifdef EXPERIMENTAL_DSN_INFO | |
3430 | , sx.smtp_greeting, sx.helo_response | |
3431 | # endif | |
3432 | ); | |
3433 | } | |
b7d3afcf | 3434 | else |
a7538db1 | 3435 | #endif |
b7d3afcf JH |
3436 | if (continue_more) |
3437 | return yield; /* More addresses for another run */ | |
0756eb3c | 3438 | |
4c04137d | 3439 | /* If the socket is successfully passed, we mustn't send QUIT (or |
0756eb3c PH |
3440 | indeed anything!) from here. */ |
3441 | ||
895fbaf2 JH |
3442 | /*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to |
3443 | propagate it from the initial | |
3444 | */ | |
d093f8e5 | 3445 | if (sx.ok && transport_pass_socket(tblock->name, host->name, |
875512a3 JH |
3446 | host->address, new_message_id, socket_fd)) |
3447 | { | |
d093f8e5 | 3448 | sx.send_quit = FALSE; |
875512a3 JH |
3449 | |
3450 | /* If TLS is still active, we need to proxy it for the transport we | |
3451 | just passed the baton to. Fork a child to to do it, and return to | |
3452 | get logging done asap. Which way to place the work makes assumptions | |
3453 | about post-fork prioritisation which may not hold on all platforms. */ | |
57cc2785 | 3454 | #ifdef SUPPORT_TLS |
875512a3 JH |
3455 | if (tls_out.active >= 0) |
3456 | { | |
3457 | int pid = fork(); | |
3458 | if (pid > 0) /* parent */ | |
3459 | { | |
b7d3afcf | 3460 | DEBUG(D_transport) debug_printf("proxy-proc inter-pid %d\n", pid); |
60272099 | 3461 | waitpid(pid, NULL, 0); |
875512a3 JH |
3462 | tls_close(FALSE, FALSE); |
3463 | (void)close(sx.inblock.sock); | |
3464 | continue_transport = NULL; | |
3465 | continue_hostname = NULL; | |
3466 | return yield; | |
3467 | } | |
60272099 | 3468 | else if (pid == 0) /* child; fork again to disconnect totally */ |
875512a3 | 3469 | { |
60272099 | 3470 | if ((pid = fork())) |
b7d3afcf JH |
3471 | { |
3472 | DEBUG(D_transport) debug_printf("proxy-prox final-pid %d\n", pid); | |
60272099 | 3473 | _exit(pid ? EXIT_FAILURE : EXIT_SUCCESS); |
b7d3afcf | 3474 | } |
57cc2785 | 3475 | smtp_proxy_tls(sx.buffer, sizeof(sx.buffer), pfd[0], sx.ob->command_timeout); |
875512a3 JH |
3476 | exim_exit(0); |
3477 | } | |
3478 | } | |
57cc2785 | 3479 | #endif |
875512a3 | 3480 | } |
0756eb3c PH |
3481 | } |
3482 | ||
3483 | /* If RSET failed and there are addresses left, they get deferred. */ | |
875512a3 JH |
3484 | else |
3485 | set_errno(sx.first_addr, errno, msg, DEFER, FALSE, host | |
895fbaf2 | 3486 | #ifdef EXPERIMENTAL_DSN_INFO |
d093f8e5 | 3487 | , sx.smtp_greeting, sx.helo_response |
895fbaf2 JH |
3488 | #endif |
3489 | ); | |
0756eb3c PH |
3490 | } |
3491 | } | |
3492 | ||
3493 | /* End off tidily with QUIT unless the connection has died or the socket has | |
3494 | been passed to another process. There has been discussion on the net about what | |
3495 | to do after sending QUIT. The wording of the RFC suggests that it is necessary | |
3496 | to wait for a response, but on the other hand, there isn't anything one can do | |
3497 | with an error response, other than log it. Exim used to do that. However, | |
3498 | further discussion suggested that it is positively advantageous not to wait for | |
3499 | the response, but to close the session immediately. This is supposed to move | |
3500 | the TCP/IP TIME_WAIT state from the server to the client, thereby removing some | |
3501 | load from the server. (Hosts that are both servers and clients may not see much | |
3502 | difference, of course.) Further discussion indicated that this was safe to do | |
3503 | on Unix systems which have decent implementations of TCP/IP that leave the | |
3504 | connection around for a while (TIME_WAIT) after the application has gone away. | |
3505 | This enables the response sent by the server to be properly ACKed rather than | |
3506 | timed out, as can happen on broken TCP/IP implementations on other OS. | |
3507 | ||
3508 | This change is being made on 31-Jul-98. After over a year of trouble-free | |
3509 | operation, the old commented-out code was removed on 17-Sep-99. */ | |
3510 | ||
3511 | SEND_QUIT: | |
4e910c01 | 3512 | if (sx.send_quit) (void)smtp_write_command(&sx.outblock, SCMD_FLUSH, "QUIT\r\n"); |
0756eb3c PH |
3513 | |
3514 | END_OFF: | |
3515 | ||
3516 | #ifdef SUPPORT_TLS | |
817d9f57 | 3517 | tls_close(FALSE, TRUE); |
0756eb3c PH |
3518 | #endif |
3519 | ||
3520 | /* Close the socket, and return the appropriate value, first setting | |
0756eb3c PH |
3521 | works because the NULL setting is passed back to the calling process, and |
3522 | remote_max_parallel is forced to 1 when delivering over an existing connection, | |
3523 | ||
3524 | If all went well and continue_more is set, we shouldn't actually get here if | |
3525 | there are further addresses, as the return above will be taken. However, | |
3526 | writing RSET might have failed, or there may be other addresses whose hosts are | |
3527 | specified in the transports, and therefore not visible at top level, in which | |
3528 | case continue_more won't get set. */ | |
3529 | ||
e1d04f48 | 3530 | HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); |
d093f8e5 | 3531 | if (sx.send_quit) |
60d10ce7 | 3532 | { |
d093f8e5 JH |
3533 | shutdown(sx.outblock.sock, SHUT_WR); |
3534 | if (fcntl(sx.inblock.sock, F_SETFL, O_NONBLOCK) == 0) | |
3535 | for (rc = 16; read(sx.inblock.sock, sx.inbuffer, sizeof(sx.inbuffer)) > 0 && rc > 0;) | |
5ddc9771 | 3536 | rc--; /* drain socket */ |
60d10ce7 | 3537 | } |
d093f8e5 | 3538 | (void)close(sx.inblock.sock); |
a7538db1 | 3539 | |
0cbf2b82 | 3540 | #ifndef DISABLE_EVENT |
774ef2d7 | 3541 | (void) event_raise(tblock->event_action, US"tcp:close", NULL); |
a7538db1 JH |
3542 | #endif |
3543 | ||
0756eb3c PH |
3544 | continue_transport = NULL; |
3545 | continue_hostname = NULL; | |
3546 | return yield; | |
3547 | } | |
3548 | ||
3549 | ||
3550 | ||
3551 | ||
3552 | /************************************************* | |
3553 | * Closedown entry point * | |
3554 | *************************************************/ | |
3555 | ||
3556 | /* This function is called when exim is passed an open smtp channel | |
3557 | from another incarnation, but the message which it has been asked | |
3558 | to deliver no longer exists. The channel is on stdin. | |
3559 | ||
3560 | We might do fancy things like looking for another message to send down | |
3561 | the channel, but if the one we sought has gone, it has probably been | |
3562 | delivered by some other process that itself will seek further messages, | |
3563 | so just close down our connection. | |
3564 | ||
3565 | Argument: pointer to the transport instance block | |
3566 | Returns: nothing | |
3567 | */ | |
3568 | ||
3569 | void | |
3570 | smtp_transport_closedown(transport_instance *tblock) | |
3571 | { | |
3572 | smtp_transport_options_block *ob = | |
02b41d71 | 3573 | (smtp_transport_options_block *)tblock->options_block; |
0756eb3c PH |
3574 | smtp_inblock inblock; |
3575 | smtp_outblock outblock; | |
3576 | uschar buffer[256]; | |
3577 | uschar inbuffer[4096]; | |
3578 | uschar outbuffer[16]; | |
3579 | ||
3580 | inblock.sock = fileno(stdin); | |
3581 | inblock.buffer = inbuffer; | |
3582 | inblock.buffersize = sizeof(inbuffer); | |
3583 | inblock.ptr = inbuffer; | |
3584 | inblock.ptrend = inbuffer; | |
3585 | ||
3586 | outblock.sock = inblock.sock; | |
3587 | outblock.buffersize = sizeof(outbuffer); | |
3588 | outblock.buffer = outbuffer; | |
3589 | outblock.ptr = outbuffer; | |
3590 | outblock.cmd_count = 0; | |
3591 | outblock.authenticating = FALSE; | |
3592 | ||
4e910c01 | 3593 | (void)smtp_write_command(&outblock, SCMD_FLUSH, "QUIT\r\n"); |
0756eb3c PH |
3594 | (void)smtp_read_response(&inblock, buffer, sizeof(buffer), '2', |
3595 | ob->command_timeout); | |
f1e894f3 | 3596 | (void)close(inblock.sock); |
0756eb3c PH |
3597 | } |
3598 | ||
3599 | ||
3600 | ||
3601 | /************************************************* | |
3602 | * Prepare addresses for delivery * | |
3603 | *************************************************/ | |
3604 | ||
3605 | /* This function is called to flush out error settings from previous delivery | |
3606 | attempts to other hosts. It also records whether we got here via an MX record | |
3607 | or not in the more_errno field of the address. We are interested only in | |
3608 | addresses that are still marked DEFER - others may have got delivered to a | |
3609 | previously considered IP address. Set their status to PENDING_DEFER to indicate | |
3610 | which ones are relevant this time. | |
3611 | ||
3612 | Arguments: | |
3613 | addrlist the list of addresses | |
3614 | host the host we are delivering to | |
3615 | ||
3616 | Returns: the first address for this delivery | |
3617 | */ | |
3618 | ||
3619 | static address_item * | |
3620 | prepare_addresses(address_item *addrlist, host_item *host) | |
3621 | { | |
3622 | address_item *first_addr = NULL; | |
3623 | address_item *addr; | |
7b4c8c1f | 3624 | for (addr = addrlist; addr; addr = addr->next) |
168dec3b JH |
3625 | if (addr->transport_return == DEFER) |
3626 | { | |
7b4c8c1f | 3627 | if (!first_addr) first_addr = addr; |
168dec3b JH |
3628 | addr->transport_return = PENDING_DEFER; |
3629 | addr->basic_errno = 0; | |
3630 | addr->more_errno = (host->mx >= 0)? 'M' : 'A'; | |
3631 | addr->message = NULL; | |
a7538db1 | 3632 | #ifdef SUPPORT_TLS |
168dec3b JH |
3633 | addr->cipher = NULL; |
3634 | addr->ourcert = NULL; | |
3635 | addr->peercert = NULL; | |
3636 | addr->peerdn = NULL; | |
3637 | addr->ocsp = OCSP_NOT_REQ; | |
895fbaf2 JH |
3638 | #endif |
3639 | #ifdef EXPERIMENTAL_DSN_INFO | |
3640 | addr->smtp_greeting = NULL; | |
3641 | addr->helo_response = NULL; | |
a7538db1 | 3642 | #endif |
168dec3b | 3643 | } |
0756eb3c PH |
3644 | return first_addr; |
3645 | } | |
3646 | ||
3647 | ||
3648 | ||
3649 | /************************************************* | |
3650 | * Main entry point * | |
3651 | *************************************************/ | |
3652 | ||
3653 | /* See local README for interface details. As this is a remote transport, it is | |
3654 | given a chain of addresses to be delivered in one connection, if possible. It | |
3655 | always returns TRUE, indicating that each address has its own independent | |
3656 | status set, except if there is a setting up problem, in which case it returns | |
3657 | FALSE. */ | |
3658 | ||
3659 | BOOL | |
3660 | smtp_transport_entry( | |
3661 | transport_instance *tblock, /* data for this instantiation */ | |
3662 | address_item *addrlist) /* addresses we are working on */ | |
3663 | { | |
3664 | int cutoff_retry; | |
a843a57e | 3665 | int defport; |
0756eb3c PH |
3666 | int hosts_defer = 0; |
3667 | int hosts_fail = 0; | |
3668 | int hosts_looked_up = 0; | |
3669 | int hosts_retry = 0; | |
3670 | int hosts_serial = 0; | |
3671 | int hosts_total = 0; | |
8e669ac1 | 3672 | int total_hosts_tried = 0; |
0756eb3c PH |
3673 | address_item *addr; |
3674 | BOOL expired = TRUE; | |
0756eb3c PH |
3675 | uschar *expanded_hosts = NULL; |
3676 | uschar *pistring; | |
3677 | uschar *tid = string_sprintf("%s transport", tblock->name); | |
3678 | smtp_transport_options_block *ob = | |
3679 | (smtp_transport_options_block *)(tblock->options_block); | |
3680 | host_item *hostlist = addrlist->host_list; | |
3681 | host_item *host = NULL; | |
3682 | ||
3683 | DEBUG(D_transport) | |
3684 | { | |
3685 | debug_printf("%s transport entered\n", tblock->name); | |
7b4c8c1f | 3686 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c | 3687 | debug_printf(" %s\n", addr->address); |
7b4c8c1f JH |
3688 | if (hostlist) |
3689 | { | |
3690 | debug_printf("hostlist:\n"); | |
3691 | for (host = hostlist; host; host = host->next) | |
3692 | debug_printf(" %s:%d\n", host->name, host->port); | |
3693 | } | |
57cc2785 JH |
3694 | if (continue_hostname) |
3695 | debug_printf("already connected to %s [%s] (on fd %d)\n", | |
3696 | continue_hostname, continue_host_address, | |
3697 | cutthrough.fd >= 0 ? cutthrough.fd : 0); | |
0756eb3c PH |
3698 | } |
3699 | ||
f6c332bd PH |
3700 | /* Set the flag requesting that these hosts be added to the waiting |
3701 | database if the delivery fails temporarily or if we are running with | |
3702 | queue_smtp or a 2-stage queue run. This gets unset for certain | |
3703 | kinds of error, typically those that are specific to the message. */ | |
3704 | ||
3705 | update_waiting = TRUE; | |
3706 | ||
0756eb3c PH |
3707 | /* If a host list is not defined for the addresses - they must all have the |
3708 | same one in order to be passed to a single transport - or if the transport has | |
3709 | a host list with hosts_override set, use the host list supplied with the | |
3710 | transport. It is an error for this not to exist. */ | |
3711 | ||
7b4c8c1f | 3712 | if (!hostlist || (ob->hosts_override && ob->hosts)) |
0756eb3c | 3713 | { |
7b4c8c1f | 3714 | if (!ob->hosts) |
0756eb3c PH |
3715 | { |
3716 | addrlist->message = string_sprintf("%s transport called with no hosts set", | |
3717 | tblock->name); | |
3718 | addrlist->transport_return = PANIC; | |
3719 | return FALSE; /* Only top address has status */ | |
3720 | } | |
3721 | ||
3722 | DEBUG(D_transport) debug_printf("using the transport's hosts: %s\n", | |
3723 | ob->hosts); | |
3724 | ||
3725 | /* If the transport's host list contains no '$' characters, and we are not | |
3726 | randomizing, it is fixed and therefore a chain of hosts can be built once | |
3727 | and for all, and remembered for subsequent use by other calls to this | |
3728 | transport. If, on the other hand, the host list does contain '$', or we are | |
3729 | randomizing its order, we have to rebuild it each time. In the fixed case, | |
3730 | as the hosts string will never be used again, it doesn't matter that we | |
3731 | replace all the : characters with zeros. */ | |
3732 | ||
7b4c8c1f | 3733 | if (!ob->hostlist) |
0756eb3c PH |
3734 | { |
3735 | uschar *s = ob->hosts; | |
3736 | ||
3737 | if (Ustrchr(s, '$') != NULL) | |
3738 | { | |
d427a7f9 | 3739 | if (!(expanded_hosts = expand_string(s))) |
0756eb3c PH |
3740 | { |
3741 | addrlist->message = string_sprintf("failed to expand list of hosts " | |
3742 | "\"%s\" in %s transport: %s", s, tblock->name, expand_string_message); | |
7b4c8c1f | 3743 | addrlist->transport_return = search_find_defer ? DEFER : PANIC; |
0756eb3c PH |
3744 | return FALSE; /* Only top address has status */ |
3745 | } | |
3746 | DEBUG(D_transport) debug_printf("expanded list of hosts \"%s\" to " | |
3747 | "\"%s\"\n", s, expanded_hosts); | |
3748 | s = expanded_hosts; | |
3749 | } | |
3750 | else | |
3751 | if (ob->hosts_randomize) s = expanded_hosts = string_copy(s); | |
3752 | ||
3753 | host_build_hostlist(&hostlist, s, ob->hosts_randomize); | |
3754 | ||
e276e04b | 3755 | /* Check that the expansion yielded something useful. */ |
7b4c8c1f | 3756 | if (!hostlist) |
e276e04b TF |
3757 | { |
3758 | addrlist->message = | |
3759 | string_sprintf("%s transport has empty hosts setting", tblock->name); | |
3760 | addrlist->transport_return = PANIC; | |
3761 | return FALSE; /* Only top address has status */ | |
3762 | } | |
3763 | ||
0756eb3c PH |
3764 | /* If there was no expansion of hosts, save the host list for |
3765 | next time. */ | |
3766 | ||
d427a7f9 | 3767 | if (!expanded_hosts) ob->hostlist = hostlist; |
0756eb3c PH |
3768 | } |
3769 | ||
3770 | /* This is not the first time this transport has been run in this delivery; | |
3771 | the host list was built previously. */ | |
3772 | ||
55414b25 JH |
3773 | else |
3774 | hostlist = ob->hostlist; | |
0756eb3c PH |
3775 | } |
3776 | ||
3777 | /* The host list was supplied with the address. If hosts_randomize is set, we | |
3778 | must sort it into a random order if it did not come from MX records and has not | |
3779 | already been randomized (but don't bother if continuing down an existing | |
3780 | connection). */ | |
3781 | ||
7b4c8c1f | 3782 | else if (ob->hosts_randomize && hostlist->mx == MX_NONE && !continue_hostname) |
0756eb3c PH |
3783 | { |
3784 | host_item *newlist = NULL; | |
7b4c8c1f | 3785 | while (hostlist) |
0756eb3c PH |
3786 | { |
3787 | host_item *h = hostlist; | |
3788 | hostlist = hostlist->next; | |
3789 | ||
3790 | h->sort_key = random_number(100); | |
3791 | ||
7b4c8c1f | 3792 | if (!newlist) |
0756eb3c PH |
3793 | { |
3794 | h->next = NULL; | |
3795 | newlist = h; | |
3796 | } | |
3797 | else if (h->sort_key < newlist->sort_key) | |
3798 | { | |
3799 | h->next = newlist; | |
3800 | newlist = h; | |
3801 | } | |
3802 | else | |
3803 | { | |
3804 | host_item *hh = newlist; | |
7b4c8c1f | 3805 | while (hh->next) |
0756eb3c PH |
3806 | { |
3807 | if (h->sort_key < hh->next->sort_key) break; | |
3808 | hh = hh->next; | |
3809 | } | |
3810 | h->next = hh->next; | |
3811 | hh->next = h; | |
3812 | } | |
3813 | } | |
3814 | ||
3815 | hostlist = addrlist->host_list = newlist; | |
3816 | } | |
3817 | ||
2d280592 | 3818 | /* Sort out the default port. */ |
0756eb3c | 3819 | |
a843a57e | 3820 | if (!smtp_get_port(ob->port, addrlist, &defport, tid)) return FALSE; |
0756eb3c | 3821 | |
0756eb3c PH |
3822 | /* For each host-plus-IP-address on the list: |
3823 | ||
3824 | . If this is a continued delivery and the host isn't the one with the | |
3825 | current connection, skip. | |
3826 | ||
3827 | . If the status is unusable (i.e. previously failed or retry checked), skip. | |
3828 | ||
3829 | . If no IP address set, get the address, either by turning the name into | |
3830 | an address, calling gethostbyname if gethostbyname is on, or by calling | |
3831 | the DNS. The DNS may yield multiple addresses, in which case insert the | |
3832 | extra ones into the list. | |
3833 | ||
3834 | . Get the retry data if not previously obtained for this address and set the | |
3835 | field which remembers the state of this address. Skip if the retry time is | |
3836 | not reached. If not, remember whether retry data was found. The retry string | |
3837 | contains both the name and the IP address. | |
3838 | ||
3839 | . Scan the list of addresses and mark those whose status is DEFER as | |
3840 | PENDING_DEFER. These are the only ones that will be processed in this cycle | |
3841 | of the hosts loop. | |
3842 | ||
3843 | . Make a delivery attempt - addresses marked PENDING_DEFER will be tried. | |
3844 | Some addresses may be successfully delivered, others may fail, and yet | |
3845 | others may get temporary errors and so get marked DEFER. | |
3846 | ||
3847 | . The return from the delivery attempt is OK if a connection was made and a | |
3848 | valid SMTP dialogue was completed. Otherwise it is DEFER. | |
3849 | ||
3850 | . If OK, add a "remove" retry item for this host/IPaddress, if any. | |
3851 | ||
3852 | . If fail to connect, or other defer state, add a retry item. | |
3853 | ||
3854 | . If there are any addresses whose status is still DEFER, carry on to the | |
3855 | next host/IPaddress, unless we have tried the number of hosts given | |
533244af | 3856 | by hosts_max_try or hosts_max_try_hardlimit; otherwise return. Note that |
8e669ac1 PH |
3857 | there is some fancy logic for hosts_max_try that means its limit can be |
3858 | overstepped in some circumstances. | |
0756eb3c PH |
3859 | |
3860 | If we get to the end of the list, all hosts have deferred at least one address, | |
3861 | or not reached their retry times. If delay_after_cutoff is unset, it requests a | |
3862 | delivery attempt to those hosts whose last try was before the arrival time of | |
3863 | the current message. To cope with this, we have to go round the loop a second | |
3864 | time. After that, set the status and error data for any addresses that haven't | |
3865 | had it set already. */ | |
3866 | ||
7b4c8c1f JH |
3867 | for (cutoff_retry = 0; |
3868 | expired && cutoff_retry < (ob->delay_after_cutoff ? 1 : 2); | |
0756eb3c PH |
3869 | cutoff_retry++) |
3870 | { | |
3871 | host_item *nexthost = NULL; | |
3872 | int unexpired_hosts_tried = 0; | |
3873 | ||
3874 | for (host = hostlist; | |
7b4c8c1f JH |
3875 | host |
3876 | && unexpired_hosts_tried < ob->hosts_max_try | |
3877 | && total_hosts_tried < ob->hosts_max_try_hardlimit; | |
0756eb3c PH |
3878 | host = nexthost) |
3879 | { | |
3880 | int rc; | |
3881 | int host_af; | |
3882 | uschar *rs; | |
0756eb3c PH |
3883 | BOOL host_is_expired = FALSE; |
3884 | BOOL message_defer = FALSE; | |
0756eb3c PH |
3885 | BOOL some_deferred = FALSE; |
3886 | address_item *first_addr = NULL; | |
3887 | uschar *interface = NULL; | |
3888 | uschar *retry_host_key = NULL; | |
3889 | uschar *retry_message_key = NULL; | |
3890 | uschar *serialize_key = NULL; | |
3891 | ||
9c4e8f60 PH |
3892 | /* Default next host is next host. :-) But this can vary if the |
3893 | hosts_max_try limit is hit (see below). It may also be reset if a host | |
3894 | address is looked up here (in case the host was multihomed). */ | |
3895 | ||
3896 | nexthost = host->next; | |
3897 | ||
0756eb3c PH |
3898 | /* If the address hasn't yet been obtained from the host name, look it up |
3899 | now, unless the host is already marked as unusable. If it is marked as | |
3900 | unusable, it means that the router was unable to find its IP address (in | |
3901 | the DNS or wherever) OR we are in the 2nd time round the cutoff loop, and | |
3902 | the lookup failed last time. We don't get this far if *all* MX records | |
3903 | point to non-existent hosts; that is treated as a hard error. | |
3904 | ||
3905 | We can just skip this host entirely. When the hosts came from the router, | |
3906 | the address will timeout based on the other host(s); when the address is | |
3907 | looked up below, there is an explicit retry record added. | |
3908 | ||
3909 | Note that we mustn't skip unusable hosts if the address is not unset; they | |
3910 | may be needed as expired hosts on the 2nd time round the cutoff loop. */ | |
3911 | ||
7b4c8c1f | 3912 | if (!host->address) |
0756eb3c | 3913 | { |
322050c2 | 3914 | int new_port, flags; |
7cd1141b | 3915 | host_item *hh; |
0756eb3c PH |
3916 | |
3917 | if (host->status >= hstatus_unusable) | |
3918 | { | |
3919 | DEBUG(D_transport) debug_printf("%s has no address and is unusable - skipping\n", | |
3920 | host->name); | |
3921 | continue; | |
3922 | } | |
3923 | ||
3924 | DEBUG(D_transport) debug_printf("getting address for %s\n", host->name); | |
3925 | ||
7cd1141b PH |
3926 | /* The host name is permitted to have an attached port. Find it, and |
3927 | strip it from the name. Just remember it for now. */ | |
3928 | ||
3929 | new_port = host_item_get_port(host); | |
3930 | ||
3931 | /* Count hosts looked up */ | |
3932 | ||
0756eb3c PH |
3933 | hosts_looked_up++; |
3934 | ||
3935 | /* Find by name if so configured, or if it's an IP address. We don't | |
3936 | just copy the IP address, because we need the test-for-local to happen. */ | |
3937 | ||
322050c2 PH |
3938 | flags = HOST_FIND_BY_A; |
3939 | if (ob->dns_qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE; | |
3940 | if (ob->dns_search_parents) flags |= HOST_FIND_SEARCH_PARENTS; | |
3941 | ||
7e66e54d | 3942 | if (ob->gethostbyname || string_is_ip_address(host->name, NULL) != 0) |
55414b25 | 3943 | rc = host_find_byname(host, NULL, flags, NULL, TRUE); |
0756eb3c | 3944 | else |
0756eb3c | 3945 | rc = host_find_bydns(host, NULL, flags, NULL, NULL, NULL, |
7cd171b7 | 3946 | &ob->dnssec, /* domains for request/require */ |
55414b25 | 3947 | NULL, NULL); |
0756eb3c | 3948 | |
7cd1141b PH |
3949 | /* Update the host (and any additional blocks, resulting from |
3950 | multihoming) with a host-specific port, if any. */ | |
3951 | ||
3952 | for (hh = host; hh != nexthost; hh = hh->next) hh->port = new_port; | |
3953 | ||
0756eb3c PH |
3954 | /* Failure to find the host at this time (usually DNS temporary failure) |
3955 | is really a kind of routing failure rather than a transport failure. | |
3956 | Therefore we add a retry item of the routing kind, not to stop us trying | |
3957 | to look this name up here again, but to ensure the address gets timed | |
3958 | out if the failures go on long enough. A complete failure at this point | |
3959 | commonly points to a configuration error, but the best action is still | |
3960 | to carry on for the next host. */ | |
3961 | ||
2546388c | 3962 | if (rc == HOST_FIND_AGAIN || rc == HOST_FIND_SECURITY || rc == HOST_FIND_FAILED) |
0756eb3c PH |
3963 | { |
3964 | retry_add_item(addrlist, string_sprintf("R:%s", host->name), 0); | |
3965 | expired = FALSE; | |
3966 | if (rc == HOST_FIND_AGAIN) hosts_defer++; else hosts_fail++; | |
3967 | DEBUG(D_transport) debug_printf("rc = %s for %s\n", (rc == HOST_FIND_AGAIN)? | |
3968 | "HOST_FIND_AGAIN" : "HOST_FIND_FAILED", host->name); | |
3969 | host->status = hstatus_unusable; | |
3970 | ||
7b4c8c1f | 3971 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
3972 | { |
3973 | if (addr->transport_return != DEFER) continue; | |
3974 | addr->basic_errno = ERRNO_UNKNOWNHOST; | |
2546388c JH |
3975 | addr->message = string_sprintf( |
3976 | rc == HOST_FIND_SECURITY | |
3977 | ? "lookup of IP address for %s was insecure" | |
3978 | : "failed to lookup IP address for %s", | |
3979 | host->name); | |
0756eb3c PH |
3980 | } |
3981 | continue; | |
3982 | } | |
3983 | ||
3984 | /* If the host is actually the local host, we may have a problem, or | |
3985 | there may be some cunning configuration going on. In the problem case, | |
3986 | log things and give up. The default transport status is already DEFER. */ | |
3987 | ||
3988 | if (rc == HOST_FOUND_LOCAL && !ob->allow_localhost) | |
3989 | { | |
7b4c8c1f | 3990 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
3991 | { |
3992 | addr->basic_errno = 0; | |
3993 | addr->message = string_sprintf("%s transport found host %s to be " | |
3994 | "local", tblock->name, host->name); | |
3995 | } | |
3996 | goto END_TRANSPORT; | |
3997 | } | |
3998 | } /* End of block for IP address lookup */ | |
3999 | ||
4000 | /* If this is a continued delivery, we are interested only in the host | |
4001 | which matches the name of the existing open channel. The check is put | |
4002 | here after the local host lookup, in case the name gets expanded as a | |
4003 | result of the lookup. Set expired FALSE, to save the outer loop executing | |
4004 | twice. */ | |
4005 | ||
7b4c8c1f JH |
4006 | if ( continue_hostname |
4007 | && ( Ustrcmp(continue_hostname, host->name) != 0 | |
4008 | || Ustrcmp(continue_host_address, host->address) != 0 | |
4009 | ) ) | |
0756eb3c PH |
4010 | { |
4011 | expired = FALSE; | |
4012 | continue; /* With next host */ | |
4013 | } | |
4014 | ||
9c4e8f60 PH |
4015 | /* Reset the default next host in case a multihomed host whose addresses |
4016 | are not looked up till just above added to the host list. */ | |
83364d30 PH |
4017 | |
4018 | nexthost = host->next; | |
4019 | ||
0756eb3c PH |
4020 | /* If queue_smtp is set (-odqs or the first part of a 2-stage run), or the |
4021 | domain is in queue_smtp_domains, we don't actually want to attempt any | |
4022 | deliveries. When doing a queue run, queue_smtp_domains is always unset. If | |
4023 | there is a lookup defer in queue_smtp_domains, proceed as if the domain | |
4024 | were not in it. We don't want to hold up all SMTP deliveries! Except when | |
4025 | doing a two-stage queue run, don't do this if forcing. */ | |
4026 | ||
4027 | if ((!deliver_force || queue_2stage) && (queue_smtp || | |
55414b25 JH |
4028 | match_isinlist(addrlist->domain, |
4029 | (const uschar **)&queue_smtp_domains, 0, | |
cf39cf57 | 4030 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)) |
0756eb3c PH |
4031 | { |
4032 | expired = FALSE; | |
7b4c8c1f JH |
4033 | for (addr = addrlist; addr; addr = addr->next) |
4034 | if (addr->transport_return == DEFER) | |
4035 | addr->message = US"domain matches queue_smtp_domains, or -odqs set"; | |
0756eb3c PH |
4036 | continue; /* With next host */ |
4037 | } | |
4038 | ||
4039 | /* Count hosts being considered - purely for an intelligent comment | |
4040 | if none are usable. */ | |
4041 | ||
4042 | hosts_total++; | |
4043 | ||
4044 | /* Set $host and $host address now in case they are needed for the | |
4045 | interface expansion or the serialize_hosts check; they remain set if an | |
4046 | actual delivery happens. */ | |
4047 | ||
4048 | deliver_host = host->name; | |
4049 | deliver_host_address = host->address; | |
783b385f JH |
4050 | lookup_dnssec_authenticated = host->dnssec == DS_YES ? US"yes" |
4051 | : host->dnssec == DS_NO ? US"no" | |
4052 | : US""; | |
0756eb3c | 4053 | |
7cd1141b PH |
4054 | /* Set up a string for adding to the retry key if the port number is not |
4055 | the standard SMTP port. A host may have its own port setting that overrides | |
4056 | the default. */ | |
4057 | ||
7b4c8c1f | 4058 | pistring = string_sprintf(":%d", host->port == PORT_NONE |
a843a57e | 4059 | ? defport : host->port); |
7cd1141b PH |
4060 | if (Ustrcmp(pistring, ":25") == 0) pistring = US""; |
4061 | ||
0756eb3c | 4062 | /* Select IPv4 or IPv6, and choose an outgoing interface. If the interface |
6f6dedcc JH |
4063 | string is set, even if constant (as different transports can have different |
4064 | constant settings), we must add it to the key that is used for retries, | |
4065 | because connections to the same host from a different interface should be | |
4066 | treated separately. */ | |
0756eb3c | 4067 | |
7b4c8c1f | 4068 | host_af = Ustrchr(host->address, ':') == NULL ? AF_INET : AF_INET6; |
6f6dedcc JH |
4069 | if ((rs = ob->interface) && *rs) |
4070 | { | |
4071 | if (!smtp_get_interface(rs, host_af, addrlist, &interface, tid)) | |
4072 | return FALSE; | |
4073 | pistring = string_sprintf("%s/%s", pistring, interface); | |
4074 | } | |
0756eb3c PH |
4075 | |
4076 | /* The first time round the outer loop, check the status of the host by | |
4077 | inspecting the retry data. The second time round, we are interested only | |
4078 | in expired hosts that haven't been tried since this message arrived. */ | |
4079 | ||
4080 | if (cutoff_retry == 0) | |
4081 | { | |
9c695f6d | 4082 | BOOL incl_ip; |
0756eb3c | 4083 | /* Ensure the status of the address is set by checking retry data if |
9c695f6d | 4084 | necessary. There may be host-specific retry data (applicable to all |
0756eb3c PH |
4085 | messages) and also data for retries of a specific message at this host. |
4086 | If either of these retry records are actually read, the keys used are | |
4087 | returned to save recomputing them later. */ | |
4088 | ||
9c695f6d JH |
4089 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, |
4090 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4091 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4092 | continue; /* with next host */ | |
4093 | ||
0756eb3c | 4094 | host_is_expired = retry_check_address(addrlist->domain, host, pistring, |
9c695f6d | 4095 | incl_ip, &retry_host_key, &retry_message_key); |
0756eb3c | 4096 | |
875512a3 | 4097 | DEBUG(D_transport) debug_printf("%s [%s]%s retry-status = %s\n", host->name, |
0756eb3c PH |
4098 | (host->address == NULL)? US"" : host->address, pistring, |
4099 | (host->status == hstatus_usable)? "usable" : | |
4100 | (host->status == hstatus_unusable)? "unusable" : | |
4101 | (host->status == hstatus_unusable_expired)? "unusable (expired)" : "?"); | |
4102 | ||
4103 | /* Skip this address if not usable at this time, noting if it wasn't | |
4104 | actually expired, both locally and in the address. */ | |
4105 | ||
4106 | switch (host->status) | |
4107 | { | |
4108 | case hstatus_unusable: | |
7b4c8c1f JH |
4109 | expired = FALSE; |
4110 | setflag(addrlist, af_retry_skipped); | |
4111 | /* Fall through */ | |
0756eb3c PH |
4112 | |
4113 | case hstatus_unusable_expired: | |
7b4c8c1f JH |
4114 | switch (host->why) |
4115 | { | |
4116 | case hwhy_retry: hosts_retry++; break; | |
4117 | case hwhy_failed: hosts_fail++; break; | |
2546388c | 4118 | case hwhy_insecure: |
7b4c8c1f JH |
4119 | case hwhy_deferred: hosts_defer++; break; |
4120 | } | |
4121 | ||
4122 | /* If there was a retry message key, implying that previously there | |
4123 | was a message-specific defer, we don't want to update the list of | |
4124 | messages waiting for these hosts. */ | |
4125 | ||
4126 | if (retry_message_key) update_waiting = FALSE; | |
4127 | continue; /* With the next host or IP address */ | |
0756eb3c PH |
4128 | } |
4129 | } | |
4130 | ||
4131 | /* Second time round the loop: if the address is set but expired, and | |
4132 | the message is newer than the last try, let it through. */ | |
4133 | ||
4134 | else | |
4135 | { | |
7b4c8c1f JH |
4136 | if ( !host->address |
4137 | || host->status != hstatus_unusable_expired | |
4138 | || host->last_try > received_time) | |
0756eb3c | 4139 | continue; |
7b4c8c1f | 4140 | DEBUG(D_transport) debug_printf("trying expired host %s [%s]%s\n", |
0756eb3c PH |
4141 | host->name, host->address, pistring); |
4142 | host_is_expired = TRUE; | |
4143 | } | |
4144 | ||
4145 | /* Setting "expired=FALSE" doesn't actually mean not all hosts are expired; | |
4146 | it remains TRUE only if all hosts are expired and none are actually tried. | |
4147 | */ | |
4148 | ||
4149 | expired = FALSE; | |
4150 | ||
4151 | /* If this host is listed as one to which access must be serialized, | |
4152 | see if another Exim process has a connection to it, and if so, skip | |
4153 | this host. If not, update the database to record our connection to it | |
4154 | and remember this for later deletion. Do not do any of this if we are | |
4155 | sending the message down a pre-existing connection. */ | |
4156 | ||
7b4c8c1f JH |
4157 | if ( !continue_hostname |
4158 | && verify_check_given_host(&ob->serialize_hosts, host) == OK) | |
0756eb3c PH |
4159 | { |
4160 | serialize_key = string_sprintf("host-serialize-%s", host->name); | |
e8ae7214 | 4161 | if (!enq_start(serialize_key, 1)) |
0756eb3c PH |
4162 | { |
4163 | DEBUG(D_transport) | |
4164 | debug_printf("skipping host %s because another Exim process " | |
4165 | "is connected to it\n", host->name); | |
4166 | hosts_serial++; | |
4167 | continue; | |
4168 | } | |
0756eb3c PH |
4169 | } |
4170 | ||
4171 | /* OK, we have an IP address that is not waiting for its retry time to | |
4172 | arrive (it might be expired) OR (second time round the loop) we have an | |
4173 | expired host that hasn't been tried since the message arrived. Have a go | |
4174 | at delivering the message to it. First prepare the addresses by flushing | |
4175 | out the result of previous attempts, and finding the first address that | |
4176 | is still to be delivered. */ | |
4177 | ||
4178 | first_addr = prepare_addresses(addrlist, host); | |
4179 | ||
4180 | DEBUG(D_transport) debug_printf("delivering %s to %s [%s] (%s%s)\n", | |
4181 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4182 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
4183 | |
4184 | set_process_info("delivering %s to %s [%s] (%s%s)", | |
4185 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4186 | addrlist->next ? ", ..." : ""); |
0756eb3c PH |
4187 | |
4188 | /* This is not for real; don't do the delivery. If there are | |
4189 | any remaining hosts, list them. */ | |
4190 | ||
4191 | if (dont_deliver) | |
4192 | { | |
4193 | host_item *host2; | |
895fbaf2 | 4194 | set_errno_nohost(addrlist, 0, NULL, OK, FALSE); |
7b4c8c1f | 4195 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4196 | { |
4197 | addr->host_used = host; | |
4198 | addr->special_action = '*'; | |
4199 | addr->message = US"delivery bypassed by -N option"; | |
4200 | } | |
4201 | DEBUG(D_transport) | |
4202 | { | |
4203 | debug_printf("*** delivery by %s transport bypassed by -N option\n" | |
4204 | "*** host and remaining hosts:\n", tblock->name); | |
7b4c8c1f | 4205 | for (host2 = host; host2; host2 = host2->next) |
0756eb3c | 4206 | debug_printf(" %s [%s]\n", host2->name, |
7b4c8c1f | 4207 | host2->address ? host2->address : US"unset"); |
0756eb3c PH |
4208 | } |
4209 | rc = OK; | |
4210 | } | |
4211 | ||
4212 | /* This is for real. If the host is expired, we don't count it for | |
4213 | hosts_max_retry. This ensures that all hosts must expire before an address | |
8e669ac1 | 4214 | is timed out, unless hosts_max_try_hardlimit (which protects against |
533244af | 4215 | lunatic DNS configurations) is reached. |
8e669ac1 | 4216 | |
533244af PH |
4217 | If the host is not expired and we are about to hit the hosts_max_retry |
4218 | limit, check to see if there is a subsequent hosts with a different MX | |
4219 | value. If so, make that the next host, and don't count this one. This is a | |
4220 | heuristic to make sure that different MXs do get tried. With a normal kind | |
4221 | of retry rule, they would get tried anyway when the earlier hosts were | |
4222 | delayed, but if the domain has a "retry every time" type of rule - as is | |
4223 | often used for the the very large ISPs, that won't happen. */ | |
0756eb3c PH |
4224 | |
4225 | else | |
4226 | { | |
d427a7f9 JH |
4227 | host_item * thost; |
4228 | /* Make a copy of the host if it is local to this invocation | |
4229 | of the transport. */ | |
4230 | ||
4231 | if (expanded_hosts) | |
4232 | { | |
4233 | thost = store_get(sizeof(host_item)); | |
4234 | *thost = *host; | |
4235 | thost->name = string_copy(host->name); | |
4236 | thost->address = string_copy(host->address); | |
4237 | } | |
4238 | else | |
4239 | thost = host; | |
4240 | ||
0756eb3c PH |
4241 | if (!host_is_expired && ++unexpired_hosts_tried >= ob->hosts_max_try) |
4242 | { | |
4243 | host_item *h; | |
4244 | DEBUG(D_transport) | |
4245 | debug_printf("hosts_max_try limit reached with this host\n"); | |
1a47b633 JH |
4246 | for (h = host; h; h = h->next) if (h->mx != host->mx) |
4247 | { | |
4248 | nexthost = h; | |
4249 | unexpired_hosts_tried--; | |
4250 | DEBUG(D_transport) debug_printf("however, a higher MX host exists " | |
4251 | "and will be tried\n"); | |
4252 | break; | |
4253 | } | |
0756eb3c PH |
4254 | } |
4255 | ||
4256 | /* Attempt the delivery. */ | |
4257 | ||
533244af | 4258 | total_hosts_tried++; |
a843a57e | 4259 | rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock, |
d427a7f9 | 4260 | &message_defer, FALSE); |
0756eb3c PH |
4261 | |
4262 | /* Yield is one of: | |
4263 | OK => connection made, each address contains its result; | |
4264 | message_defer is set for message-specific defers (when all | |
4265 | recipients are marked defer) | |
4266 | DEFER => there was a non-message-specific delivery problem; | |
4267 | ERROR => there was a problem setting up the arguments for a filter, | |
4268 | or there was a problem with expanding added headers | |
4269 | */ | |
4270 | ||
4271 | /* If the result is not OK, there was a non-message-specific problem. | |
4272 | If the result is DEFER, we need to write to the logs saying what happened | |
4273 | for this particular host, except in the case of authentication and TLS | |
4274 | failures, where the log has already been written. If all hosts defer a | |
4275 | general message is written at the end. */ | |
4276 | ||
7b4c8c1f JH |
4277 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL |
4278 | && first_addr->basic_errno != ERRNO_TLSFAILURE) | |
0756eb3c PH |
4279 | write_logs(first_addr, host); |
4280 | ||
0cbf2b82 | 4281 | #ifndef DISABLE_EVENT |
d68218c7 | 4282 | if (rc == DEFER) |
774ef2d7 | 4283 | deferred_event_raise(first_addr, host); |
a7538db1 | 4284 | #endif |
d68218c7 | 4285 | |
0756eb3c PH |
4286 | /* If STARTTLS was accepted, but there was a failure in setting up the |
4287 | TLS session (usually a certificate screwup), and the host is not in | |
4288 | hosts_require_tls, and tls_tempfail_tryclear is true, try again, with | |
4289 | TLS forcibly turned off. We have to start from scratch with a new SMTP | |
4290 | connection. That's why the retry is done from here, not from within | |
4291 | smtp_deliver(). [Rejections of STARTTLS itself don't screw up the | |
4292 | session, so the in-clear transmission after those errors, if permitted, | |
4293 | happens inside smtp_deliver().] */ | |
4294 | ||
a7538db1 | 4295 | #ifdef SUPPORT_TLS |
7a31d643 JH |
4296 | if ( rc == DEFER |
4297 | && first_addr->basic_errno == ERRNO_TLSFAILURE | |
4298 | && ob->tls_tempfail_tryclear | |
5130845b | 4299 | && verify_check_given_host(&ob->hosts_require_tls, host) != OK |
7a31d643 | 4300 | ) |
0756eb3c | 4301 | { |
cf0c6164 JH |
4302 | log_write(0, LOG_MAIN, |
4303 | "%s: delivering unencrypted to H=%s [%s] (not in hosts_require_tls)", | |
4304 | first_addr->message, host->name, host->address); | |
0756eb3c | 4305 | first_addr = prepare_addresses(addrlist, host); |
a843a57e | 4306 | rc = smtp_deliver(addrlist, thost, host_af, defport, interface, tblock, |
d427a7f9 | 4307 | &message_defer, TRUE); |
0756eb3c PH |
4308 | if (rc == DEFER && first_addr->basic_errno != ERRNO_AUTHFAIL) |
4309 | write_logs(first_addr, host); | |
0cbf2b82 | 4310 | # ifndef DISABLE_EVENT |
d68218c7 | 4311 | if (rc == DEFER) |
774ef2d7 | 4312 | deferred_event_raise(first_addr, host); |
a7538db1 | 4313 | # endif |
0756eb3c | 4314 | } |
a1bccd48 | 4315 | #endif /*SUPPORT_TLS*/ |
0756eb3c PH |
4316 | } |
4317 | ||
4318 | /* Delivery attempt finished */ | |
4319 | ||
7b4c8c1f JH |
4320 | rs = rc == OK ? US"OK" |
4321 | : rc == DEFER ? US"DEFER" | |
4322 | : rc == ERROR ? US"ERROR" | |
4323 | : US"?"; | |
0756eb3c PH |
4324 | |
4325 | set_process_info("delivering %s: just tried %s [%s] for %s%s: result %s", | |
4326 | message_id, host->name, host->address, addrlist->address, | |
7b4c8c1f | 4327 | addrlist->next ? " (& others)" : "", rs); |
0756eb3c PH |
4328 | |
4329 | /* Release serialization if set up */ | |
4330 | ||
7b4c8c1f | 4331 | if (serialize_key) enq_end(serialize_key); |
0756eb3c PH |
4332 | |
4333 | /* If the result is DEFER, or if a host retry record is known to exist, we | |
4334 | need to add an item to the retry chain for updating the retry database | |
4335 | at the end of delivery. We only need to add the item to the top address, | |
4336 | of course. Also, if DEFER, we mark the IP address unusable so as to skip it | |
4337 | for any other delivery attempts using the same address. (It is copied into | |
4338 | the unusable tree at the outer level, so even if different address blocks | |
4339 | contain the same address, it still won't get tried again.) */ | |
4340 | ||
7b4c8c1f | 4341 | if (rc == DEFER || retry_host_key) |
0756eb3c | 4342 | { |
7b4c8c1f JH |
4343 | int delete_flag = rc != DEFER ? rf_delete : 0; |
4344 | if (!retry_host_key) | |
0756eb3c | 4345 | { |
9c695f6d JH |
4346 | BOOL incl_ip; |
4347 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4348 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4349 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4350 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4351 | ||
7b4c8c1f JH |
4352 | retry_host_key = incl_ip |
4353 | ? string_sprintf("T:%S:%s%s", host->name, host->address, pistring) | |
4354 | : string_sprintf("T:%S%s", host->name, pistring); | |
0756eb3c PH |
4355 | } |
4356 | ||
4357 | /* If a delivery of another message over an existing SMTP connection | |
4358 | yields DEFER, we do NOT set up retry data for the host. This covers the | |
4359 | case when there are delays in routing the addresses in the second message | |
4360 | that are so long that the server times out. This is alleviated by not | |
4361 | routing addresses that previously had routing defers when handling an | |
4362 | existing connection, but even so, this case may occur (e.g. if a | |
4363 | previously happily routed address starts giving routing defers). If the | |
4364 | host is genuinely down, another non-continued message delivery will | |
4365 | notice it soon enough. */ | |
4366 | ||
7b4c8c1f | 4367 | if (delete_flag != 0 || !continue_hostname) |
0756eb3c PH |
4368 | retry_add_item(first_addr, retry_host_key, rf_host | delete_flag); |
4369 | ||
4370 | /* We may have tried an expired host, if its retry time has come; ensure | |
4371 | the status reflects the expiry for the benefit of any other addresses. */ | |
4372 | ||
4373 | if (rc == DEFER) | |
4374 | { | |
7b4c8c1f JH |
4375 | host->status = host_is_expired |
4376 | ? hstatus_unusable_expired : hstatus_unusable; | |
0756eb3c PH |
4377 | host->why = hwhy_deferred; |
4378 | } | |
4379 | } | |
4380 | ||
4381 | /* If message_defer is set (host was OK, but every recipient got deferred | |
4382 | because of some message-specific problem), or if that had happened | |
4383 | previously so that a message retry key exists, add an appropriate item | |
4384 | to the retry chain. Note that if there was a message defer but now there is | |
4385 | a host defer, the message defer record gets deleted. That seems perfectly | |
4386 | reasonable. Also, stop the message from being remembered as waiting | |
f6c332bd | 4387 | for specific hosts. */ |
0756eb3c | 4388 | |
7b4c8c1f | 4389 | if (message_defer || retry_message_key) |
0756eb3c | 4390 | { |
7b4c8c1f JH |
4391 | int delete_flag = message_defer ? 0 : rf_delete; |
4392 | if (!retry_message_key) | |
0756eb3c | 4393 | { |
9c695f6d JH |
4394 | BOOL incl_ip; |
4395 | if (exp_bool(addrlist, US"transport", tblock->name, D_transport, | |
4396 | US"retry_include_ip_address", ob->retry_include_ip_address, | |
4397 | ob->expand_retry_include_ip_address, &incl_ip) != OK) | |
4398 | incl_ip = TRUE; /* error; use most-specific retry record */ | |
4399 | ||
7b4c8c1f JH |
4400 | retry_message_key = incl_ip |
4401 | ? string_sprintf("T:%S:%s%s:%s", host->name, host->address, pistring, | |
4402 | message_id) | |
4403 | : string_sprintf("T:%S%s:%s", host->name, pistring, message_id); | |
0756eb3c PH |
4404 | } |
4405 | retry_add_item(addrlist, retry_message_key, | |
4406 | rf_message | rf_host | delete_flag); | |
f6c332bd | 4407 | update_waiting = FALSE; |
0756eb3c PH |
4408 | } |
4409 | ||
4410 | /* Any return other than DEFER (that is, OK or ERROR) means that the | |
4411 | addresses have got their final statuses filled in for this host. In the OK | |
4412 | case, see if any of them are deferred. */ | |
4413 | ||
4414 | if (rc == OK) | |
4cea764f | 4415 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4416 | if (addr->transport_return == DEFER) |
4417 | { | |
4418 | some_deferred = TRUE; | |
4419 | break; | |
4420 | } | |
0756eb3c PH |
4421 | |
4422 | /* If no addresses deferred or the result was ERROR, return. We do this for | |
4423 | ERROR because a failing filter set-up or add_headers expansion is likely to | |
4424 | fail for any host we try. */ | |
4425 | ||
4426 | if (rc == ERROR || (rc == OK && !some_deferred)) | |
4427 | { | |
4428 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4429 | return TRUE; /* Each address has its status */ | |
4430 | } | |
4431 | ||
4432 | /* If the result was DEFER or some individual addresses deferred, let | |
4433 | the loop run to try other hosts with the deferred addresses, except for the | |
4434 | case when we were trying to deliver down an existing channel and failed. | |
4435 | Don't try any other hosts in this case. */ | |
4436 | ||
7b4c8c1f | 4437 | if (continue_hostname) break; |
0756eb3c PH |
4438 | |
4439 | /* If the whole delivery, or some individual addresses, were deferred and | |
4440 | there are more hosts that could be tried, do not count this host towards | |
4441 | the hosts_max_try limit if the age of the message is greater than the | |
4442 | maximum retry time for this host. This means we may try try all hosts, | |
4443 | ignoring the limit, when messages have been around for some time. This is | |
4444 | important because if we don't try all hosts, the address will never time | |
533244af | 4445 | out. NOTE: this does not apply to hosts_max_try_hardlimit. */ |
0756eb3c | 4446 | |
7b4c8c1f | 4447 | if ((rc == DEFER || some_deferred) && nexthost) |
0756eb3c PH |
4448 | { |
4449 | BOOL timedout; | |
4450 | retry_config *retry = retry_find_config(host->name, NULL, 0, 0); | |
4451 | ||
7b4c8c1f | 4452 | if (retry && retry->rules) |
0756eb3c PH |
4453 | { |
4454 | retry_rule *last_rule; | |
4455 | for (last_rule = retry->rules; | |
7b4c8c1f | 4456 | last_rule->next; |
0756eb3c PH |
4457 | last_rule = last_rule->next); |
4458 | timedout = time(NULL) - received_time > last_rule->timeout; | |
4459 | } | |
4460 | else timedout = TRUE; /* No rule => timed out */ | |
4461 | ||
4462 | if (timedout) | |
4463 | { | |
4464 | unexpired_hosts_tried--; | |
4465 | DEBUG(D_transport) debug_printf("temporary delivery error(s) override " | |
4466 | "hosts_max_try (message older than host's retry time)\n"); | |
4467 | } | |
4468 | } | |
4469 | } /* End of loop for trying multiple hosts. */ | |
4470 | ||
4471 | /* This is the end of the loop that repeats iff expired is TRUE and | |
4472 | ob->delay_after_cutoff is FALSE. The second time round we will | |
4473 | try those hosts that haven't been tried since the message arrived. */ | |
4474 | ||
4475 | DEBUG(D_transport) | |
4476 | { | |
4477 | debug_printf("all IP addresses skipped or deferred at least one address\n"); | |
4478 | if (expired && !ob->delay_after_cutoff && cutoff_retry == 0) | |
4479 | debug_printf("retrying IP addresses not tried since message arrived\n"); | |
4480 | } | |
4481 | } | |
4482 | ||
4483 | ||
4484 | /* Get here if all IP addresses are skipped or defer at least one address. In | |
4485 | MUA wrapper mode, this will happen only for connection or other non-message- | |
4486 | specific failures. Force the delivery status for all addresses to FAIL. */ | |
4487 | ||
4488 | if (mua_wrapper) | |
4489 | { | |
7b4c8c1f | 4490 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4491 | addr->transport_return = FAIL; |
4492 | goto END_TRANSPORT; | |
4493 | } | |
4494 | ||
4495 | /* In the normal, non-wrapper case, add a standard message to each deferred | |
4496 | address if there hasn't been an error, that is, if it hasn't actually been | |
4497 | tried this time. The variable "expired" will be FALSE if any deliveries were | |
4498 | actually tried, or if there was at least one host that was not expired. That | |
4499 | is, it is TRUE only if no deliveries were tried and all hosts were expired. If | |
4500 | a delivery has been tried, an error code will be set, and the failing of the | |
4501 | message is handled by the retry code later. | |
4502 | ||
4503 | If queue_smtp is set, or this transport was called to send a subsequent message | |
4504 | down an existing TCP/IP connection, and something caused the host not to be | |
4505 | found, we end up here, but can detect these cases and handle them specially. */ | |
4506 | ||
c3f2eb9a | 4507 | for (addr = addrlist; addr; addr = addr->next) |
0756eb3c PH |
4508 | { |
4509 | /* If host is not NULL, it means that we stopped processing the host list | |
533244af PH |
4510 | because of hosts_max_try or hosts_max_try_hardlimit. In the former case, this |
4511 | means we need to behave as if some hosts were skipped because their retry | |
4512 | time had not come. Specifically, this prevents the address from timing out. | |
8e669ac1 | 4513 | However, if we have hit hosts_max_try_hardlimit, we want to behave as if all |
533244af | 4514 | hosts were tried. */ |
0756eb3c | 4515 | |
c3f2eb9a | 4516 | if (host) |
533244af PH |
4517 | if (total_hosts_tried >= ob->hosts_max_try_hardlimit) |
4518 | { | |
4519 | DEBUG(D_transport) | |
4520 | debug_printf("hosts_max_try_hardlimit reached: behave as if all " | |
4521 | "hosts were tried\n"); | |
4522 | } | |
4523 | else | |
8e669ac1 | 4524 | { |
533244af PH |
4525 | DEBUG(D_transport) |
4526 | debug_printf("hosts_max_try limit caused some hosts to be skipped\n"); | |
4527 | setflag(addr, af_retry_skipped); | |
8e669ac1 | 4528 | } |
0756eb3c PH |
4529 | |
4530 | if (queue_smtp) /* no deliveries attempted */ | |
4531 | { | |
4532 | addr->transport_return = DEFER; | |
4533 | addr->basic_errno = 0; | |
4534 | addr->message = US"SMTP delivery explicitly queued"; | |
4535 | } | |
4536 | ||
c3f2eb9a JH |
4537 | else if ( addr->transport_return == DEFER |
4538 | && (addr->basic_errno == ERRNO_UNKNOWNERROR || addr->basic_errno == 0) | |
4539 | && !addr->message | |
4540 | ) | |
0756eb3c PH |
4541 | { |
4542 | addr->basic_errno = ERRNO_HRETRY; | |
c3f2eb9a | 4543 | if (continue_hostname) |
0756eb3c | 4544 | addr->message = US"no host found for existing SMTP connection"; |
0756eb3c PH |
4545 | else if (expired) |
4546 | { | |
fffffe4c | 4547 | setflag(addr, af_pass_message); /* This is not a security risk */ |
c3f2eb9a JH |
4548 | addr->message = string_sprintf( |
4549 | "all hosts%s have been failing for a long time %s", | |
4550 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US"", | |
4551 | ob->delay_after_cutoff | |
4552 | ? US"(and retry time not reached)" | |
4553 | : US"and were last tried after this message arrived"); | |
0756eb3c PH |
4554 | |
4555 | /* If we are already using fallback hosts, or there are no fallback hosts | |
4556 | defined, convert the result to FAIL to cause a bounce. */ | |
4557 | ||
c3f2eb9a | 4558 | if (addr->host_list == addr->fallback_hosts || !addr->fallback_hosts) |
0756eb3c PH |
4559 | addr->transport_return = FAIL; |
4560 | } | |
4561 | else | |
4562 | { | |
93a680e4 | 4563 | const char * s; |
0756eb3c | 4564 | if (hosts_retry == hosts_total) |
93a680e4 | 4565 | s = "retry time not reached for any host%s"; |
0756eb3c | 4566 | else if (hosts_fail == hosts_total) |
93a680e4 | 4567 | s = "all host address lookups%s failed permanently"; |
0756eb3c | 4568 | else if (hosts_defer == hosts_total) |
93a680e4 | 4569 | s = "all host address lookups%s failed temporarily"; |
0756eb3c | 4570 | else if (hosts_serial == hosts_total) |
93a680e4 | 4571 | s = "connection limit reached for all hosts%s"; |
0756eb3c | 4572 | else if (hosts_fail+hosts_defer == hosts_total) |
93a680e4 | 4573 | s = "all host address lookups%s failed"; |
3cf01803 | 4574 | else |
93a680e4 | 4575 | s = "some host address lookups failed and retry time " |
3cf01803 JH |
4576 | "not reached for other hosts or connection limit reached%s"; |
4577 | ||
4578 | addr->message = string_sprintf(s, | |
4579 | addr->domain ? string_sprintf(" for '%s'", addr->domain) : US""); | |
0756eb3c PH |
4580 | } |
4581 | } | |
4582 | } | |
4583 | ||
4584 | /* Update the database which keeps information about which messages are waiting | |
f6c332bd PH |
4585 | for which hosts to become available. For some message-specific errors, the |
4586 | update_waiting flag is turned off because we don't want follow-on deliveries in | |
ea722490 | 4587 | those cases. If this transport instance is explicitly limited to one message |
8b260705 PP |
4588 | per connection then follow-on deliveries are not possible and there's no need |
4589 | to create/update the per-transport wait-<transport_name> database. */ | |
0756eb3c | 4590 | |
ea722490 JH |
4591 | if (update_waiting && tblock->connection_max_messages != 1) |
4592 | transport_update_waiting(hostlist, tblock->name); | |
0756eb3c PH |
4593 | |
4594 | END_TRANSPORT: | |
4595 | ||
4596 | DEBUG(D_transport) debug_printf("Leaving %s transport\n", tblock->name); | |
4597 | ||
4598 | return TRUE; /* Each address has its status */ | |
4599 | } | |
4600 | ||
578897ea JH |
4601 | /* vi: aw ai sw=2 |
4602 | */ | |
0756eb3c | 4603 | /* End of transport/smtp.c */ |