use smtp_context struct for sync_responses()
[exim.git] / src / src / transports / smtp.c
CommitLineData
0756eb3c
PH
1/*************************************************
2* Exim - an Internet mail transport agent *
3*************************************************/
4
80fea873 5/* Copyright (c) University of Cambridge 1995 - 2016 */
0756eb3c
PH
6/* See the file NOTICE for conditions of use and distribution. */
7
8#include "../exim.h"
9#include "smtp.h"
10
0756eb3c
PH
11
12/* Options specific to the smtp transport. This transport also supports LMTP
13over TCP/IP. The options must be in alphabetic order (note that "_" comes
14before the lower case letters). Some live in the transport_instance block so as
15to be publicly visible; these are flagged with opt_public. */
16
17optionlist smtp_transport_options[] = {
506900af
JH
18 { "*expand_multi_domain", opt_stringptr | opt_hidden | opt_public,
19 (void *)offsetof(transport_instance, expand_multi_domain) },
9c695f6d
JH
20 { "*expand_retry_include_ip_address", opt_stringptr | opt_hidden,
21 (void *)(offsetof(smtp_transport_options_block, expand_retry_include_ip_address)) },
22
48c7f9e2
PH
23 { "address_retry_include_sender", opt_bool,
24 (void *)offsetof(smtp_transport_options_block, address_retry_include_sender) },
0756eb3c
PH
25 { "allow_localhost", opt_bool,
26 (void *)offsetof(smtp_transport_options_block, allow_localhost) },
27 { "authenticated_sender", opt_stringptr,
28 (void *)offsetof(smtp_transport_options_block, authenticated_sender) },
382afc6b
PH
29 { "authenticated_sender_force", opt_bool,
30 (void *)offsetof(smtp_transport_options_block, authenticated_sender_force) },
0756eb3c
PH
31 { "command_timeout", opt_time,
32 (void *)offsetof(smtp_transport_options_block, command_timeout) },
33 { "connect_timeout", opt_time,
34 (void *)offsetof(smtp_transport_options_block, connect_timeout) },
35 { "connection_max_messages", opt_int | opt_public,
36 (void *)offsetof(transport_instance, connection_max_messages) },
37 { "data_timeout", opt_time,
38 (void *)offsetof(smtp_transport_options_block, data_timeout) },
39 { "delay_after_cutoff", opt_bool,
40 (void *)offsetof(smtp_transport_options_block, delay_after_cutoff) },
80a47a2c 41#ifndef DISABLE_DKIM
f7572e5a 42 { "dkim_canon", opt_stringptr,
ff5aac2b 43 (void *)offsetof(smtp_transport_options_block, dkim.dkim_canon) },
f7572e5a 44 { "dkim_domain", opt_stringptr,
ff5aac2b 45 (void *)offsetof(smtp_transport_options_block, dkim.dkim_domain) },
f7572e5a 46 { "dkim_private_key", opt_stringptr,
ff5aac2b 47 (void *)offsetof(smtp_transport_options_block, dkim.dkim_private_key) },
f7572e5a 48 { "dkim_selector", opt_stringptr,
ff5aac2b 49 (void *)offsetof(smtp_transport_options_block, dkim.dkim_selector) },
f7572e5a 50 { "dkim_sign_headers", opt_stringptr,
ff5aac2b 51 (void *)offsetof(smtp_transport_options_block, dkim.dkim_sign_headers) },
f7572e5a 52 { "dkim_strict", opt_stringptr,
ff5aac2b 53 (void *)offsetof(smtp_transport_options_block, dkim.dkim_strict) },
80a47a2c 54#endif
0756eb3c
PH
55 { "dns_qualify_single", opt_bool,
56 (void *)offsetof(smtp_transport_options_block, dns_qualify_single) },
57 { "dns_search_parents", opt_bool,
58 (void *)offsetof(smtp_transport_options_block, dns_search_parents) },
578897ea 59 { "dnssec_request_domains", opt_stringptr,
7cd171b7 60 (void *)offsetof(smtp_transport_options_block, dnssec.request) },
578897ea 61 { "dnssec_require_domains", opt_stringptr,
7cd171b7 62 (void *)offsetof(smtp_transport_options_block, dnssec.require) },
9e4f5962
PP
63 { "dscp", opt_stringptr,
64 (void *)offsetof(smtp_transport_options_block, dscp) },
0756eb3c
PH
65 { "fallback_hosts", opt_stringptr,
66 (void *)offsetof(smtp_transport_options_block, fallback_hosts) },
67 { "final_timeout", opt_time,
68 (void *)offsetof(smtp_transport_options_block, final_timeout) },
69 { "gethostbyname", opt_bool,
70 (void *)offsetof(smtp_transport_options_block, gethostbyname) },
71 { "helo_data", opt_stringptr,
72 (void *)offsetof(smtp_transport_options_block, helo_data) },
73 { "hosts", opt_stringptr,
74 (void *)offsetof(smtp_transport_options_block, hosts) },
75 { "hosts_avoid_esmtp", opt_stringptr,
76 (void *)offsetof(smtp_transport_options_block, hosts_avoid_esmtp) },
c51b8e75
PH
77 { "hosts_avoid_pipelining", opt_stringptr,
78 (void *)offsetof(smtp_transport_options_block, hosts_avoid_pipelining) },
80a47a2c 79#ifdef SUPPORT_TLS
0756eb3c
PH
80 { "hosts_avoid_tls", opt_stringptr,
81 (void *)offsetof(smtp_transport_options_block, hosts_avoid_tls) },
80a47a2c 82#endif
0756eb3c
PH
83 { "hosts_max_try", opt_int,
84 (void *)offsetof(smtp_transport_options_block, hosts_max_try) },
533244af
PH
85 { "hosts_max_try_hardlimit", opt_int,
86 (void *)offsetof(smtp_transport_options_block, hosts_max_try_hardlimit) },
80a47a2c 87#ifdef SUPPORT_TLS
0756eb3c
PH
88 { "hosts_nopass_tls", opt_stringptr,
89 (void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) },
80a47a2c 90#endif
0756eb3c
PH
91 { "hosts_override", opt_bool,
92 (void *)offsetof(smtp_transport_options_block, hosts_override) },
93 { "hosts_randomize", opt_bool,
94 (void *)offsetof(smtp_transport_options_block, hosts_randomize) },
f2de3a33 95#if defined(SUPPORT_TLS) && !defined(DISABLE_OCSP)
44662487
JH
96 { "hosts_request_ocsp", opt_stringptr,
97 (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) },
98#endif
0756eb3c
PH
99 { "hosts_require_auth", opt_stringptr,
100 (void *)offsetof(smtp_transport_options_block, hosts_require_auth) },
80a47a2c 101#ifdef SUPPORT_TLS
7a31d643
JH
102# ifdef EXPERIMENTAL_DANE
103 { "hosts_require_dane", opt_stringptr,
104 (void *)offsetof(smtp_transport_options_block, hosts_require_dane) },
105# endif
f2de3a33 106# ifndef DISABLE_OCSP
f5d78688
JH
107 { "hosts_require_ocsp", opt_stringptr,
108 (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) },
109# endif
0756eb3c
PH
110 { "hosts_require_tls", opt_stringptr,
111 (void *)offsetof(smtp_transport_options_block, hosts_require_tls) },
80a47a2c 112#endif
0756eb3c
PH
113 { "hosts_try_auth", opt_stringptr,
114 (void *)offsetof(smtp_transport_options_block, hosts_try_auth) },
f98442df
JH
115 { "hosts_try_chunking", opt_stringptr,
116 (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) },
7a31d643 117#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
96e47838
TL
118 { "hosts_try_dane", opt_stringptr,
119 (void *)offsetof(smtp_transport_options_block, hosts_try_dane) },
120#endif
fb05276a
JH
121 { "hosts_try_fastopen", opt_stringptr,
122 (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) },
8ccd00b1 123#ifndef DISABLE_PRDR
fd98a5c6
JH
124 { "hosts_try_prdr", opt_stringptr,
125 (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) },
126#endif
99400968
JH
127#ifdef SUPPORT_TLS
128 { "hosts_verify_avoid_tls", opt_stringptr,
129 (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) },
130#endif
0756eb3c
PH
131 { "interface", opt_stringptr,
132 (void *)offsetof(smtp_transport_options_block, interface) },
133 { "keepalive", opt_bool,
134 (void *)offsetof(smtp_transport_options_block, keepalive) },
f1513293
PH
135 { "lmtp_ignore_quota", opt_bool,
136 (void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) },
0756eb3c
PH
137 { "max_rcpt", opt_int | opt_public,
138 (void *)offsetof(transport_instance, max_addresses) },
506900af 139 { "multi_domain", opt_expand_bool | opt_public,
0756eb3c
PH
140 (void *)offsetof(transport_instance, multi_domain) },
141 { "port", opt_stringptr,
142 (void *)offsetof(smtp_transport_options_block, port) },
143 { "protocol", opt_stringptr,
144 (void *)offsetof(smtp_transport_options_block, protocol) },
9c695f6d 145 { "retry_include_ip_address", opt_expand_bool,
0756eb3c
PH
146 (void *)offsetof(smtp_transport_options_block, retry_include_ip_address) },
147 { "serialize_hosts", opt_stringptr,
148 (void *)offsetof(smtp_transport_options_block, serialize_hosts) },
149 { "size_addition", opt_int,
150 (void *)offsetof(smtp_transport_options_block, size_addition) }
f0989ec0 151#ifdef SUPPORT_SOCKS
7eb6c37c
JH
152 ,{ "socks_proxy", opt_stringptr,
153 (void *)offsetof(smtp_transport_options_block, socks_proxy) }
154#endif
80a47a2c 155#ifdef SUPPORT_TLS
0756eb3c
PH
156 ,{ "tls_certificate", opt_stringptr,
157 (void *)offsetof(smtp_transport_options_block, tls_certificate) },
158 { "tls_crl", opt_stringptr,
159 (void *)offsetof(smtp_transport_options_block, tls_crl) },
54c90be1
PP
160 { "tls_dh_min_bits", opt_int,
161 (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) },
0756eb3c
PH
162 { "tls_privatekey", opt_stringptr,
163 (void *)offsetof(smtp_transport_options_block, tls_privatekey) },
3f0945ff 164 { "tls_require_ciphers", opt_stringptr,
0756eb3c 165 (void *)offsetof(smtp_transport_options_block, tls_require_ciphers) },
3f0945ff
PP
166 { "tls_sni", opt_stringptr,
167 (void *)offsetof(smtp_transport_options_block, tls_sni) },
0756eb3c
PH
168 { "tls_tempfail_tryclear", opt_bool,
169 (void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) },
a63be306
WB
170 { "tls_try_verify_hosts", opt_stringptr,
171 (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) },
e51c7be2
JH
172 { "tls_verify_cert_hostnames", opt_stringptr,
173 (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)},
0756eb3c 174 { "tls_verify_certificates", opt_stringptr,
a63be306
WB
175 (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) },
176 { "tls_verify_hosts", opt_stringptr,
177 (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) }
80a47a2c 178#endif
0756eb3c
PH
179};
180
181/* Size of the options list. An extern variable has to be used so that its
182address can appear in the tables drtables.c. */
183
184int smtp_transport_options_count =
185 sizeof(smtp_transport_options)/sizeof(optionlist);
186
187/* Default private options block for the smtp transport. */
188
189smtp_transport_options_block smtp_transport_option_defaults = {
190 NULL, /* hosts */
191 NULL, /* fallback_hosts */
192 NULL, /* hostlist */
193 NULL, /* fallback_hostlist */
194 NULL, /* authenticated_sender */
195 US"$primary_hostname", /* helo_data */
196 NULL, /* interface */
197 NULL, /* port */
198 US"smtp", /* protocol */
9e4f5962 199 NULL, /* DSCP */
0756eb3c
PH
200 NULL, /* serialize_hosts */
201 NULL, /* hosts_try_auth */
202 NULL, /* hosts_require_auth */
f98442df 203 US"*", /* hosts_try_chunking */
96e47838
TL
204#ifdef EXPERIMENTAL_DANE
205 NULL, /* hosts_try_dane */
7a31d643 206 NULL, /* hosts_require_dane */
96e47838 207#endif
fb05276a 208 NULL, /* hosts_try_fastopen */
8ccd00b1 209#ifndef DISABLE_PRDR
f98442df 210 US"*", /* hosts_try_prdr */
fd98a5c6 211#endif
f2de3a33 212#ifndef DISABLE_OCSP
0e66b3b6 213 US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */
f5d78688
JH
214 NULL, /* hosts_require_ocsp */
215#endif
0756eb3c
PH
216 NULL, /* hosts_require_tls */
217 NULL, /* hosts_avoid_tls */
6c9ed72e 218 NULL, /* hosts_verify_avoid_tls */
c51b8e75 219 NULL, /* hosts_avoid_pipelining */
0756eb3c
PH
220 NULL, /* hosts_avoid_esmtp */
221 NULL, /* hosts_nopass_tls */
222 5*60, /* command_timeout */
223 5*60, /* connect_timeout; shorter system default overrides */
224 5*60, /* data timeout */
225 10*60, /* final timeout */
226 1024, /* size_addition */
227 5, /* hosts_max_try */
8e669ac1 228 50, /* hosts_max_try_hardlimit */
48c7f9e2 229 TRUE, /* address_retry_include_sender */
0756eb3c 230 FALSE, /* allow_localhost */
382afc6b 231 FALSE, /* authenticated_sender_force */
0756eb3c
PH
232 FALSE, /* gethostbyname */
233 TRUE, /* dns_qualify_single */
234 FALSE, /* dns_search_parents */
0539a19d 235 { NULL, NULL }, /* dnssec_domains {request,require} */
0756eb3c
PH
236 TRUE, /* delay_after_cutoff */
237 FALSE, /* hosts_override */
238 FALSE, /* hosts_randomize */
239 TRUE, /* keepalive */
f1513293 240 FALSE, /* lmtp_ignore_quota */
9c695f6d 241 NULL, /* expand_retry_include_ip_address */
0756eb3c 242 TRUE /* retry_include_ip_address */
f0989ec0 243#ifdef SUPPORT_SOCKS
7eb6c37c 244 ,NULL /* socks_proxy */
b8bf753b 245#endif
80a47a2c 246#ifdef SUPPORT_TLS
0756eb3c
PH
247 ,NULL, /* tls_certificate */
248 NULL, /* tls_crl */
249 NULL, /* tls_privatekey */
250 NULL, /* tls_require_ciphers */
54c90be1 251 NULL, /* tls_sni */
0e0f3f56 252 US"system", /* tls_verify_certificates */
54c90be1
PP
253 EXIM_CLIENT_DH_DEFAULT_MIN_BITS,
254 /* tls_dh_min_bits */
a63be306
WB
255 TRUE, /* tls_tempfail_tryclear */
256 NULL, /* tls_verify_hosts */
610ff438 257 US"*", /* tls_try_verify_hosts */
01a4a5c5 258 US"*" /* tls_verify_cert_hostnames */
80a47a2c
TK
259#endif
260#ifndef DISABLE_DKIM
ff5aac2b
JH
261 , {NULL, /* dkim_canon */
262 NULL, /* dkim_domain */
263 NULL, /* dkim_private_key */
264 NULL, /* dkim_selector */
265 NULL, /* dkim_sign_headers */
e983e85a
JH
266 NULL, /* dkim_strict */
267 FALSE} /* dot_stuffed */
80a47a2c 268#endif
0756eb3c
PH
269};
270
6c1c3d1d
WB
271/* some DSN flags for use later */
272
273static int rf_list[] = {rf_notify_never, rf_notify_success,
274 rf_notify_failure, rf_notify_delay };
275
45500060 276static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" };
6c1c3d1d
WB
277
278
0756eb3c
PH
279
280/* Local statics */
281
87cb4a16
JH
282static uschar *smtp_command; /* Points to last cmd for error messages */
283static uschar *mail_command; /* Points to MAIL cmd for error messages */
284static uschar *data_command = US""; /* Points to DATA cmd for error messages */
285static BOOL update_waiting; /* TRUE to update the "wait" database */
286static BOOL pipelining_active; /* current transaction is in pipe mode */
0756eb3c
PH
287
288
289/*************************************************
290* Setup entry point *
291*************************************************/
292
293/* This function is called when the transport is about to be used,
294but before running it in a sub-process. It is used for two things:
295
296 (1) To set the fallback host list in addresses, when delivering.
26da7e20
PH
297 (2) To pass back the interface, port, protocol, and other options, for use
298 during callout verification.
0756eb3c
PH
299
300Arguments:
301 tblock pointer to the transport instance block
302 addrlist list of addresses about to be transported
303 tf if not NULL, pointer to block in which to return options
929ba01c
PH
304 uid the uid that will be set (not used)
305 gid the gid that will be set (not used)
0756eb3c
PH
306 errmsg place for error message (not used)
307
308Returns: OK always (FAIL, DEFER not used)
309*/
310
311static int
312smtp_transport_setup(transport_instance *tblock, address_item *addrlist,
929ba01c 313 transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg)
0756eb3c
PH
314{
315smtp_transport_options_block *ob =
316 (smtp_transport_options_block *)(tblock->options_block);
317
318errmsg = errmsg; /* Keep picky compilers happy */
929ba01c
PH
319uid = uid;
320gid = gid;
0756eb3c
PH
321
322/* Pass back options if required. This interface is getting very messy. */
323
02b41d71 324if (tf)
0756eb3c
PH
325 {
326 tf->interface = ob->interface;
327 tf->port = ob->port;
328 tf->protocol = ob->protocol;
329 tf->hosts = ob->hosts;
330 tf->hosts_override = ob->hosts_override;
331 tf->hosts_randomize = ob->hosts_randomize;
332 tf->gethostbyname = ob->gethostbyname;
333 tf->qualify_single = ob->dns_qualify_single;
334 tf->search_parents = ob->dns_search_parents;
26da7e20 335 tf->helo_data = ob->helo_data;
0756eb3c
PH
336 }
337
338/* Set the fallback host list for all the addresses that don't have fallback
339host lists, provided that the local host wasn't present in the original host
340list. */
341
342if (!testflag(addrlist, af_local_host_removed))
02b41d71
JH
343 for (; addrlist; addrlist = addrlist->next)
344 if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist;
0756eb3c
PH
345
346return OK;
347}
348
349
350
351/*************************************************
352* Initialization entry point *
353*************************************************/
354
355/* Called for each instance, after its options have been read, to
356enable consistency checks to be done, or anything else that needs
357to be set up.
358
359Argument: pointer to the transport instance block
360Returns: nothing
361*/
362
363void
364smtp_transport_init(transport_instance *tblock)
365{
366smtp_transport_options_block *ob =
367 (smtp_transport_options_block *)(tblock->options_block);
368
369/* Retry_use_local_part defaults FALSE if unset */
370
371if (tblock->retry_use_local_part == TRUE_UNSET)
372 tblock->retry_use_local_part = FALSE;
373
374/* Set the default port according to the protocol */
375
376if (ob->port == NULL)
061b7ebd
PP
377 ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" :
378 (strcmpic(ob->protocol, US"smtps") == 0)? US"smtps" : US"smtp";
0756eb3c
PH
379
380/* Set up the setup entry point, to be called before subprocesses for this
381transport. */
382
383tblock->setup = smtp_transport_setup;
384
385/* Complain if any of the timeouts are zero. */
386
387if (ob->command_timeout <= 0 || ob->data_timeout <= 0 ||
388 ob->final_timeout <= 0)
389 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
390 "command, data, or final timeout value is zero for %s transport",
391 tblock->name);
392
393/* If hosts_override is set and there are local hosts, set the global
394flag that stops verify from showing router hosts. */
395
396if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE;
397
398/* If there are any fallback hosts listed, build a chain of host items
399for them, but do not do any lookups at this time. */
400
401host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE);
402}
403
404
405
406
407
408/*************************************************
409* Set delivery info into all active addresses *
410*************************************************/
411
412/* Only addresses whose status is >= PENDING are relevant. A lesser
413status means that an address is not currently being processed.
414
415Arguments:
447d236c
PH
416 addrlist points to a chain of addresses
417 errno_value to put in each address's errno field
418 msg to put in each address's message field
419 rc to put in each address's transport_return field
420 pass_message if TRUE, set the "pass message" flag in the address
c562fd30 421 host if set, mark addrs as having used this host
895fbaf2
JH
422 smtp_greeting from peer
423 helo_response from peer
0756eb3c
PH
424
425If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in
426the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate
427this particular type of timeout.
428
429Returns: nothing
430*/
431
7cd1141b
PH
432static void
433set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc,
895fbaf2
JH
434 BOOL pass_message, host_item * host
435#ifdef EXPERIMENTAL_DSN_INFO
436 , const uschar * smtp_greeting, const uschar * helo_response
437#endif
438 )
0756eb3c
PH
439{
440address_item *addr;
441int orvalue = 0;
442if (errno_value == ERRNO_CONNECTTIMEOUT)
443 {
444 errno_value = ETIMEDOUT;
445 orvalue = RTEF_CTOUT;
446 }
895fbaf2 447for (addr = addrlist; addr; addr = addr->next)
168dec3b 448 if (addr->transport_return >= PENDING)
447d236c 449 {
168dec3b
JH
450 addr->basic_errno = errno_value;
451 addr->more_errno |= orvalue;
02b41d71 452 if (msg)
168dec3b
JH
453 {
454 addr->message = msg;
455 if (pass_message) setflag(addr, af_pass_message);
456 }
457 addr->transport_return = rc;
458 if (host)
895fbaf2 459 {
168dec3b 460 addr->host_used = host;
895fbaf2
JH
461#ifdef EXPERIMENTAL_DSN_INFO
462 if (smtp_greeting)
463 {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';}
464 addr->smtp_greeting = smtp_greeting;
465
466 if (helo_response)
467 {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';}
468 addr->helo_response = helo_response;
469#endif
470 }
447d236c 471 }
0756eb3c
PH
472}
473
895fbaf2
JH
474static void
475set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc,
476 BOOL pass_message)
477{
478set_errno(addrlist, errno_value, msg, rc, pass_message, NULL
479#ifdef EXPERIMENTAL_DSN_INFO
480 , NULL, NULL
481#endif
482 );
483}
0756eb3c
PH
484
485
486/*************************************************
487* Check an SMTP response *
488*************************************************/
489
490/* This function is given an errno code and the SMTP response buffer
491to analyse, together with the host identification for generating messages. It
492sets an appropriate message and puts the first digit of the response code into
493the yield variable. If no response was actually read, a suitable digit is
494chosen.
495
496Arguments:
447d236c
PH
497 host the current host, to get its name for messages
498 errno_value pointer to the errno value
499 more_errno from the top address for use with ERRNO_FILTER_FAIL
500 buffer the SMTP response buffer
501 yield where to put a one-digit SMTP response code
4c04137d 502 message where to put an error message
447d236c
PH
503 pass_message set TRUE if message is an SMTP response
504
505Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE
0756eb3c
PH
506*/
507
a7538db1
JH
508static BOOL
509check_response(host_item *host, int *errno_value, int more_errno,
447d236c 510 uschar *buffer, int *yield, uschar **message, BOOL *pass_message)
0756eb3c 511{
0d9fa8c0 512uschar * pl = pipelining_active ? US"pipelined " : US"";
0756eb3c
PH
513
514*yield = '4'; /* Default setting is to give a temporary error */
515
516/* Handle response timeout */
517
518if (*errno_value == ETIMEDOUT)
519 {
c562fd30
JH
520 *message = US string_sprintf("SMTP timeout after %s%s",
521 pl, smtp_command);
0756eb3c
PH
522 if (transport_count > 0)
523 *message = US string_sprintf("%s (%d bytes written)", *message,
524 transport_count);
525 return FALSE;
526 }
527
528/* Handle malformed SMTP response */
529
530if (*errno_value == ERRNO_SMTPFORMAT)
531 {
55414b25 532 const uschar *malfresp = string_printing(buffer);
0756eb3c 533 while (isspace(*malfresp)) malfresp++;
c562fd30
JH
534 *message = *malfresp == 0
535 ? string_sprintf("Malformed SMTP reply (an empty line) "
536 "in response to %s%s", pl, smtp_command)
537 : string_sprintf("Malformed SMTP reply in response to %s%s: %s",
538 pl, smtp_command, malfresp);
0756eb3c
PH
539 return FALSE;
540 }
541
542/* Handle a failed filter process error; can't send QUIT as we mustn't
543end the DATA. */
544
545if (*errno_value == ERRNO_FILTER_FAIL)
546 {
35af9f61 547 *message = US string_sprintf("transport filter process failed (%d)%s",
8e669ac1 548 more_errno,
35af9f61 549 (more_errno == EX_EXECFAILED)? ": unable to execute command" : "");
0756eb3c
PH
550 return FALSE;
551 }
552
553/* Handle a failed add_headers expansion; can't send QUIT as we mustn't
554end the DATA. */
555
556if (*errno_value == ERRNO_CHHEADER_FAIL)
557 {
558 *message =
559 US string_sprintf("failed to expand headers_add or headers_remove: %s",
560 expand_string_message);
561 return FALSE;
562 }
563
564/* Handle failure to write a complete data block */
565
566if (*errno_value == ERRNO_WRITEINCOMPLETE)
567 {
568 *message = US string_sprintf("failed to write a data block");
569 return FALSE;
570 }
571
8c5d388a 572#ifdef SUPPORT_I18N
250b6871
JH
573/* Handle lack of advertised SMTPUTF8, for international message */
574if (*errno_value == ERRNO_UTF8_FWD)
575 {
d093f8e5 576 *message = US"utf8 support required but not offered for forwarding";
250b6871
JH
577 DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message);
578 return TRUE;
579 }
580#endif
581
0756eb3c
PH
582/* Handle error responses from the remote mailer. */
583
584if (buffer[0] != 0)
585 {
55414b25 586 const uschar *s = string_printing(buffer);
447d236c 587 *message = US string_sprintf("SMTP error from remote mail server after %s%s: "
c562fd30 588 "%s", pl, smtp_command, s);
447d236c 589 *pass_message = TRUE;
0756eb3c
PH
590 *yield = buffer[0];
591 return TRUE;
592 }
593
594/* No data was read. If there is no errno, this must be the EOF (i.e.
19b9dc85
PH
595connection closed) case, which causes deferral. An explicit connection reset
596error has the same effect. Otherwise, put the host's identity in the message,
597leaving the errno value to be interpreted as well. In all cases, we have to
598assume the connection is now dead. */
0756eb3c 599
19b9dc85 600if (*errno_value == 0 || *errno_value == ECONNRESET)
0756eb3c
PH
601 {
602 *errno_value = ERRNO_SMTPCLOSED;
c562fd30 603 *message = US string_sprintf("Remote host closed connection "
02b41d71 604 "in response to %s%s", pl, smtp_command);
0756eb3c
PH
605 }
606else *message = US string_sprintf("%s [%s]", host->name, host->address);
607
608return FALSE;
609}
610
611
612
613/*************************************************
614* Write error message to logs *
615*************************************************/
616
617/* This writes to the main log and to the message log.
618
619Arguments:
620 addr the address item containing error information
621 host the current host
622
623Returns: nothing
624*/
625
626static void
627write_logs(address_item *addr, host_item *host)
628{
584ddd64
JH
629uschar * message = LOGGING(outgoing_port)
630 ? string_sprintf("H=%s [%s]:%d", host->name, host->address,
631 host->port == PORT_NONE ? 25 : host->port)
632 : string_sprintf("H=%s [%s]", host->name, host->address);
c562fd30
JH
633
634if (addr->message)
0756eb3c 635 {
c562fd30 636 message = string_sprintf("%s: %s", message, addr->message);
0756eb3c
PH
637 if (addr->basic_errno > 0)
638 message = string_sprintf("%s: %s", message, strerror(addr->basic_errno));
639 log_write(0, LOG_MAIN, "%s", message);
640 deliver_msglog("%s %s\n", tod_stamp(tod_log), message);
641 }
642else
643 {
37f3dc43
JH
644 const uschar * s = exim_errstr(addr->basic_errno);
645 log_write(0, LOG_MAIN, "%s %s", message, s);
646 deliver_msglog("%s %s %s\n", tod_stamp(tod_log), message, s);
0756eb3c
PH
647 }
648}
649
c562fd30
JH
650static void
651msglog_line(host_item * host, uschar * message)
652{
37f3dc43
JH
653deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log),
654 host->name, host->address, message);
c562fd30
JH
655}
656
0756eb3c
PH
657
658
0cbf2b82 659#ifndef DISABLE_EVENT
d68218c7
JH
660/*************************************************
661* Post-defer action *
662*************************************************/
663
664/* This expands an arbitrary per-transport string.
665 It might, for example, be used to write to the database log.
666
667Arguments:
d68218c7
JH
668 addr the address item containing error information
669 host the current host
670
671Returns: nothing
672*/
673
674static void
774ef2d7 675deferred_event_raise(address_item *addr, host_item *host)
d68218c7 676{
774ef2d7 677uschar * action = addr->transport->event_action;
55414b25 678const uschar * save_domain;
a7538db1
JH
679uschar * save_local;
680
d68218c7 681if (!action)
a7538db1 682 return;
d68218c7 683
a7538db1
JH
684save_domain = deliver_domain;
685save_local = deliver_localpart;
686
687/*XXX would ip & port already be set up? */
688deliver_host_address = string_copy(host->address);
774ef2d7
JH
689deliver_host_port = host->port == PORT_NONE ? 25 : host->port;
690event_defer_errno = addr->basic_errno;
d68218c7
JH
691
692router_name = addr->router->name;
693transport_name = addr->transport->name;
a7538db1
JH
694deliver_domain = addr->domain;
695deliver_localpart = addr->local_part;
696
774ef2d7 697(void) event_raise(action, US"msg:host:defer",
a7538db1
JH
698 addr->message
699 ? addr->basic_errno > 0
700 ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno))
701 : string_copy(addr->message)
702 : addr->basic_errno > 0
703 ? string_copy(US strerror(addr->basic_errno))
704 : NULL);
705
706deliver_localpart = save_local;
707deliver_domain = save_domain;
d68218c7
JH
708router_name = transport_name = NULL;
709}
710#endif
711
0756eb3c
PH
712/*************************************************
713* Synchronize SMTP responses *
714*************************************************/
715
716/* This function is called from smtp_deliver() to receive SMTP responses from
717the server, and match them up with the commands to which they relate. When
718PIPELINING is not in use, this function is called after every command, and is
719therefore somewhat over-engineered, but it is simpler to use a single scheme
720that works both with and without PIPELINING instead of having two separate sets
721of code.
722
723The set of commands that are buffered up with pipelining may start with MAIL
724and may end with DATA; in between are RCPT commands that correspond to the
725addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH,
726etc.) are never buffered.
727
728Errors after MAIL or DATA abort the whole process leaving the response in the
729buffer. After MAIL, pending responses are flushed, and the original command is
730re-instated in big_buffer for error messages. For RCPT commands, the remote is
731permitted to reject some recipient addresses while accepting others. However
732certain errors clearly abort the whole process. Set the value in
733transport_return to PENDING_OK if the address is accepted. If there is a
734subsequent general error, it will get reset accordingly. If not, it will get
735converted to OK at the end.
736
737Arguments:
df5b41e3 738 sx smtp connection context
48c7f9e2 739 count the number of responses to read
48c7f9e2
PH
740 pending_DATA 0 if last command sent was not DATA
741 +1 if previously had a good recipient
742 -1 if not previously had a good recipient
0756eb3c
PH
743
744Returns: 3 if at least one address had 2xx and one had 5xx
745 2 if at least one address had 5xx but none had 2xx
746 1 if at least one host had a 2xx response, but none had 5xx
747 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA)
748 -1 timeout while reading RCPT response
749 -2 I/O or other non-response error for RCPT
750 -3 DATA or MAIL failed - errno and buffer set
751*/
752
753static int
df5b41e3 754sync_responses(smtp_context * sx, int count, int pending_DATA)
0756eb3c 755{
df5b41e3 756address_item *addr = sx->sync_addr;
0756eb3c
PH
757int yield = 0;
758
759/* Handle the response for a MAIL command. On error, reinstate the original
760command in big_buffer for error message use, and flush any further pending
761responses before returning, except after I/O errors and timeouts. */
762
df5b41e3 763if (sx->pending_MAIL)
0756eb3c
PH
764 {
765 count--;
df5b41e3 766 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', ((smtp_transport_options_block *)sx->tblock->options_block)->command_timeout))
0756eb3c 767 {
e027f545 768 DEBUG(D_transport) debug_printf("bad response for MAIL\n");
0756eb3c 769 Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */
df5b41e3 770 if (errno == 0 && sx->buffer[0] != 0)
0756eb3c
PH
771 {
772 uschar flushbuffer[4096];
e97957bc 773 int save_errno = 0;
df5b41e3 774 if (sx->buffer[0] == '4')
e97957bc
PH
775 {
776 save_errno = ERRNO_MAIL4XX;
df5b41e3 777 addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
e97957bc 778 }
0756eb3c
PH
779 while (count-- > 0)
780 {
df5b41e3
JH
781 if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer),
782 '2', ((smtp_transport_options_block *)sx->tblock->options_block)->command_timeout)
0756eb3c
PH
783 && (errno != 0 || flushbuffer[0] == 0))
784 break;
785 }
e97957bc 786 errno = save_errno;
0756eb3c 787 }
c562fd30
JH
788
789 if (pending_DATA) count--; /* Number of RCPT responses to come */
790 while (count-- > 0) /* Mark any pending addrs with the host used */
791 {
792 while (addr->transport_return != PENDING_DEFER) addr = addr->next;
df5b41e3 793 addr->host_used = sx->host;
c562fd30
JH
794 addr = addr->next;
795 }
0756eb3c
PH
796 return -3;
797 }
798 }
799
800if (pending_DATA) count--; /* Number of RCPT responses to come */
801
802/* Read and handle the required number of RCPT responses, matching each one up
803with an address by scanning for the next address whose status is PENDING_DEFER.
804*/
805
806while (count-- > 0)
807 {
808 while (addr->transport_return != PENDING_DEFER) addr = addr->next;
809
810 /* The address was accepted */
df5b41e3 811 addr->host_used = sx->host;
0756eb3c 812
df5b41e3 813 if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2', ((smtp_transport_options_block *)sx->tblock->options_block)->command_timeout))
0756eb3c
PH
814 {
815 yield |= 1;
816 addr->transport_return = PENDING_OK;
817
818 /* If af_dr_retry_exists is set, there was a routing delay on this address;
09945f1e
PH
819 ensure that any address-specific retry record is expunged. We do this both
820 for the basic key and for the version that also includes the sender. */
0756eb3c
PH
821
822 if (testflag(addr, af_dr_retry_exists))
09945f1e
PH
823 {
824 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
825 sender_address);
826 retry_add_item(addr, altkey, rf_delete);
0756eb3c 827 retry_add_item(addr, addr->address_retry_key, rf_delete);
09945f1e 828 }
0756eb3c
PH
829 }
830
831 /* Timeout while reading the response */
832
833 else if (errno == ETIMEDOUT)
834 {
c562fd30 835 uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>",
df5b41e3
JH
836 transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes));
837 set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE);
0756eb3c 838 retry_add_item(addr, addr->address_retry_key, 0);
f6c332bd 839 update_waiting = FALSE;
0756eb3c
PH
840 return -1;
841 }
842
843 /* Handle other errors in obtaining an SMTP response by returning -1. This
844 will cause all the addresses to be deferred. Restore the SMTP command in
845 big_buffer for which we are checking the response, so the error message
846 makes sense. */
847
df5b41e3 848 else if (errno != 0 || sx->buffer[0] == 0)
0756eb3c
PH
849 {
850 string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>",
df5b41e3 851 transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes));
0756eb3c
PH
852 return -2;
853 }
854
855 /* Handle SMTP permanent and temporary response codes. */
856
857 else
858 {
859 addr->message =
447d236c 860 string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: "
df5b41e3
JH
861 "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes),
862 string_printing(sx->buffer));
447d236c 863 setflag(addr, af_pass_message);
df5b41e3 864 msglog_line(sx->host, addr->message);
0756eb3c
PH
865
866 /* The response was 5xx */
867
df5b41e3 868 if (sx->buffer[0] == '5')
0756eb3c
PH
869 {
870 addr->transport_return = FAIL;
871 yield |= 2;
872 }
873
874 /* The response was 4xx */
875
876 else
877 {
0756eb3c
PH
878 addr->transport_return = DEFER;
879 addr->basic_errno = ERRNO_RCPT4XX;
df5b41e3 880 addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
0756eb3c 881
0cbf2b82 882#ifndef DISABLE_EVENT
5ef5dd52
JB
883 event_defer_errno = addr->more_errno;
884 msg_event_raise(US"msg:rcpt:host:defer", addr);
885#endif
886
c562fd30
JH
887 /* Log temporary errors if there are more hosts to be tried.
888 If not, log this last one in the == line. */
0756eb3c 889
df5b41e3
JH
890 if (sx->host->next)
891 log_write(0, LOG_MAIN, "H=%s [%s]: %s", sx->host->name, sx->host->address, addr->message);
0756eb3c 892
0cbf2b82 893#ifndef DISABLE_EVENT
5ef5dd52
JB
894 else
895 msg_event_raise(US"msg:rcpt:defer", addr);
896#endif
897
f6c332bd
PH
898 /* Do not put this message on the list of those waiting for specific
899 hosts, as otherwise it is likely to be tried too often. */
0756eb3c 900
f6c332bd 901 update_waiting = FALSE;
0756eb3c 902
48c7f9e2
PH
903 /* Add a retry item for the address so that it doesn't get tried again
904 too soon. If address_retry_include_sender is true, add the sender address
905 to the retry key. */
0756eb3c 906
df5b41e3 907 if (((smtp_transport_options_block *)sx->tblock->options_block)->address_retry_include_sender)
48c7f9e2
PH
908 {
909 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
910 sender_address);
911 retry_add_item(addr, altkey, 0);
912 }
913 else retry_add_item(addr, addr->address_retry_key, 0);
0756eb3c
PH
914 }
915 }
916 } /* Loop for next RCPT response */
917
918/* Update where to start at for the next block of responses, unless we
919have already handled all the addresses. */
920
df5b41e3 921if (addr != NULL) sx->sync_addr = addr->next;
0756eb3c
PH
922
923/* Handle a response to DATA. If we have not had any good recipients, either
924previously or in this block, the response is ignored. */
925
926if (pending_DATA != 0 &&
df5b41e3 927 !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '3', ((smtp_transport_options_block *)sx->tblock->options_block)->command_timeout))
0756eb3c
PH
928 {
929 int code;
930 uschar *msg;
447d236c 931 BOOL pass_message;
e97957bc
PH
932 if (pending_DATA > 0 || (yield & 1) != 0)
933 {
df5b41e3 934 if (errno == 0 && sx->buffer[0] == '4')
e97957bc
PH
935 {
936 errno = ERRNO_DATA4XX;
df5b41e3 937 sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
e97957bc
PH
938 }
939 return -3;
940 }
df5b41e3 941 (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message);
0756eb3c
PH
942 DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining "
943 "is in use and there were no good recipients\n", msg);
944 }
945
946/* All responses read and handled; MAIL (if present) received 2xx and DATA (if
947present) received 3xx. If any RCPTs were handled and yielded anything other
948than 4xx, yield will be set non-zero. */
949
950return yield;
951}
952
953
954
fcc8e047
JH
955/* Do the client side of smtp-level authentication */
956/*
957Arguments:
958 buffer EHLO response from server (gets overwritten)
959 addrlist chain of potential addresses to deliver
960 host host to deliver to
961 ob transport options
962 ibp, obp comms channel control blocks
963
964Returns:
965 OK Success, or failed (but not required): global "smtp_authenticated" set
966 DEFER Failed authentication (and was required)
967 ERROR Internal problem
968
969 FAIL_SEND Failed communications - transmit
970 FAIL - response
971*/
972
973int
974smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host,
975 smtp_transport_options_block *ob, BOOL is_esmtp,
976 smtp_inblock *ibp, smtp_outblock *obp)
977{
a7538db1
JH
978int require_auth;
979uschar *fail_reason = US"server did not advertise AUTH support";
fcc8e047 980
a7538db1
JH
981smtp_authenticated = FALSE;
982client_authenticator = client_authenticated_id = client_authenticated_sender = NULL;
5130845b 983require_auth = verify_check_given_host(&ob->hosts_require_auth, host);
fcc8e047 984
a7538db1
JH
985if (is_esmtp && !regex_AUTH) regex_AUTH =
986 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
987 FALSE, TRUE);
fcc8e047 988
a7538db1
JH
989if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1))
990 {
991 uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]);
992 expand_nmax = -1; /* reset */
fcc8e047 993
a7538db1
JH
994 /* Must not do this check until after we have saved the result of the
995 regex match above. */
fcc8e047 996
a7538db1 997 if (require_auth == OK ||
5130845b 998 verify_check_given_host(&ob->hosts_try_auth, host) == OK)
a7538db1
JH
999 {
1000 auth_instance *au;
1001 fail_reason = US"no common mechanisms were found";
fcc8e047 1002
a7538db1 1003 DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n");
fcc8e047 1004
a7538db1
JH
1005 /* Scan the configured authenticators looking for one which is configured
1006 for use as a client, which is not suppressed by client_condition, and
1007 whose name matches an authentication mechanism supported by the server.
1008 If one is found, attempt to authenticate by calling its client function.
1009 */
fcc8e047 1010
a7538db1
JH
1011 for (au = auths; !smtp_authenticated && au != NULL; au = au->next)
1012 {
1013 uschar *p = names;
1014 if (!au->client ||
1015 (au->client_condition != NULL &&
1016 !expand_check_condition(au->client_condition, au->name,
1017 US"client authenticator")))
1018 {
1019 DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n",
1020 au->name,
1021 (au->client)? "client_condition is false" :
1022 "not configured as a client");
1023 continue;
1024 }
fcc8e047 1025
a7538db1 1026 /* Loop to scan supported server mechanisms */
fcc8e047 1027
a7538db1
JH
1028 while (*p != 0)
1029 {
1030 int rc;
1031 int len = Ustrlen(au->public_name);
1032 while (isspace(*p)) p++;
fcc8e047 1033
a7538db1
JH
1034 if (strncmpic(au->public_name, p, len) != 0 ||
1035 (p[len] != 0 && !isspace(p[len])))
1036 {
1037 while (*p != 0 && !isspace(*p)) p++;
1038 continue;
1039 }
fcc8e047 1040
a7538db1
JH
1041 /* Found data for a listed mechanism. Call its client entry. Set
1042 a flag in the outblock so that data is overwritten after sending so
1043 that reflections don't show it. */
fcc8e047 1044
a7538db1
JH
1045 fail_reason = US"authentication attempt(s) failed";
1046 obp->authenticating = TRUE;
1047 rc = (au->info->clientcode)(au, ibp, obp,
1048 ob->command_timeout, buffer, bufsize);
1049 obp->authenticating = FALSE;
1050 DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n",
1051 au->name, rc);
fcc8e047 1052
a7538db1
JH
1053 /* A temporary authentication failure must hold up delivery to
1054 this host. After a permanent authentication failure, we carry on
1055 to try other authentication methods. If all fail hard, try to
1056 deliver the message unauthenticated unless require_auth was set. */
fcc8e047 1057
a7538db1
JH
1058 switch(rc)
1059 {
1060 case OK:
1061 smtp_authenticated = TRUE; /* stops the outer loop */
1062 client_authenticator = au->name;
1063 if (au->set_client_id != NULL)
1064 client_authenticated_id = expand_string(au->set_client_id);
1065 break;
1066
1067 /* Failure after writing a command */
1068
1069 case FAIL_SEND:
1070 return FAIL_SEND;
1071
1072 /* Failure after reading a response */
1073
1074 case FAIL:
1075 if (errno != 0 || buffer[0] != '5') return FAIL;
1076 log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s",
1077 au->name, host->name, host->address, buffer);
1078 break;
1079
1080 /* Failure by some other means. In effect, the authenticator
1081 decided it wasn't prepared to handle this case. Typically this
1082 is the result of "fail" in an expansion string. Do we need to
1083 log anything here? Feb 2006: a message is now put in the buffer
1084 if logging is required. */
1085
1086 case CANCELLED:
1087 if (*buffer != 0)
1088 log_write(0, LOG_MAIN, "%s authenticator cancelled "
1089 "authentication H=%s [%s] %s", au->name, host->name,
1090 host->address, buffer);
1091 break;
1092
1093 /* Internal problem, message in buffer. */
1094
1095 case ERROR:
895fbaf2
JH
1096 set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer),
1097 DEFER, FALSE);
a7538db1
JH
1098 return ERROR;
1099 }
fcc8e047 1100
a7538db1
JH
1101 break; /* If not authenticated, try next authenticator */
1102 } /* Loop for scanning supported server mechanisms */
1103 } /* Loop for further authenticators */
fcc8e047 1104 }
a7538db1 1105 }
fcc8e047 1106
a7538db1 1107/* If we haven't authenticated, but are required to, give up. */
fcc8e047 1108
a7538db1
JH
1109if (require_auth == OK && !smtp_authenticated)
1110 {
895fbaf2 1111 set_errno_nohost(addrlist, ERRNO_AUTHFAIL,
a7538db1 1112 string_sprintf("authentication required but %s", fail_reason), DEFER,
895fbaf2 1113 FALSE);
a7538db1
JH
1114 return DEFER;
1115 }
4d8d62b9 1116
a7538db1 1117return OK;
fcc8e047
JH
1118}
1119
1120
1121/* Construct AUTH appendix string for MAIL TO */
1122/*
1123Arguments
1124 buffer to build string
1125 addrlist chain of potential addresses to deliver
1126 ob transport options
1127
1128Globals smtp_authenticated
1129 client_authenticated_sender
1130Return True on error, otherwise buffer has (possibly empty) terminated string
1131*/
1132
1133BOOL
1134smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist,
1135 smtp_transport_options_block *ob)
1136{
1137uschar *local_authenticated_sender = authenticated_sender;
1138
1139#ifdef notdef
1140 debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N");
1141#endif
1142
1143if (ob->authenticated_sender != NULL)
1144 {
1145 uschar *new = expand_string(ob->authenticated_sender);
1146 if (new == NULL)
1147 {
1148 if (!expand_string_forcedfail)
1149 {
1150 uschar *message = string_sprintf("failed to expand "
1151 "authenticated_sender: %s", expand_string_message);
895fbaf2 1152 set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
fcc8e047
JH
1153 return TRUE;
1154 }
1155 }
1156 else if (new[0] != 0) local_authenticated_sender = new;
1157 }
1158
1159/* Add the authenticated sender address if present */
1160
1161if ((smtp_authenticated || ob->authenticated_sender_force) &&
1162 local_authenticated_sender != NULL)
1163 {
1164 string_format(buffer, bufsize, " AUTH=%s",
1165 auth_xtextencode(local_authenticated_sender,
1166 Ustrlen(local_authenticated_sender)));
1167 client_authenticated_sender = string_copy(local_authenticated_sender);
1168 }
1169else
1170 *buffer= 0;
1171
1172return FALSE;
1173}
1174
1175
1176
0e66b3b6 1177#ifdef EXPERIMENTAL_DANE
2d5fdd53
JH
1178/* Lookup TLSA record for host/port.
1179Return: OK success with dnssec; DANE mode
1180 DEFER Do not use this host now, may retry later
1181 FAIL_FORCED No TLSA record; DANE not usable
1182 FAIL Do not use this connection
1183*/
1184
0e66b3b6 1185int
4b0fe319 1186tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required)
0e66b3b6
JH
1187{
1188/* move this out to host.c given the similarity to dns_lookup() ? */
1189uschar buffer[300];
55414b25 1190const uschar * fullname = buffer;
0e66b3b6
JH
1191
1192/* TLSA lookup string */
1193(void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name);
1194
1195switch (dns_lookup(dnsa, buffer, T_TLSA, &fullname))
1196 {
0e66b3b6
JH
1197 case DNS_SUCCEED:
1198 if (!dns_is_secure(dnsa))
1199 {
1200 log_write(0, LOG_MAIN, "DANE error: TLSA lookup not DNSSEC");
1201 return DEFER;
1202 }
4b0fe319 1203 return OK;
2d5fdd53
JH
1204
1205 case DNS_AGAIN:
1206 return DEFER; /* just defer this TLS'd conn */
1207
ef3a1a30
JH
1208 case DNS_NODATA: /* no TLSA RR for this lookup */
1209 case DNS_NOMATCH: /* no records at all for this lookup */
2d5fdd53
JH
1210 return dane_required ? FAIL : FAIL_FORCED;
1211
1212 default:
1213 case DNS_FAIL:
1214 return dane_required ? FAIL : DEFER;
0e66b3b6 1215 }
0e66b3b6
JH
1216}
1217#endif
1218
1219
a39bd74d
JB
1220
1221typedef struct smtp_compare_s
1222{
1223 uschar *current_sender_address;
1224 struct transport_instance *tblock;
1225} smtp_compare_t;
1226
d093f8e5
JH
1227
1228/* Create a unique string that identifies this message, it is based on
1229sender_address, helo_data and tls_certificate if enabled.
1230*/
a39bd74d
JB
1231
1232static uschar *
1233smtp_local_identity(uschar * sender, struct transport_instance * tblock)
1234{
1235address_item * addr1;
1236uschar * if1 = US"";
1237uschar * helo1 = US"";
1238#ifdef SUPPORT_TLS
1239uschar * tlsc1 = US"";
1240#endif
1241uschar * save_sender_address = sender_address;
1242uschar * local_identity = NULL;
1243smtp_transport_options_block * ob =
1244 (smtp_transport_options_block *)tblock->options_block;
1245
1246sender_address = sender;
1247
1248addr1 = deliver_make_addr (sender, TRUE);
1249deliver_set_expansions(addr1);
1250
1251if (ob->interface)
1252 if1 = expand_string(ob->interface);
1253
1254if (ob->helo_data)
1255 helo1 = expand_string(ob->helo_data);
1256
1257#ifdef SUPPORT_TLS
1258if (ob->tls_certificate)
1259 tlsc1 = expand_string(ob->tls_certificate);
1260local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1);
1261#else
1262local_identity = string_sprintf ("%s^%s", if1, helo1);
1263#endif
1264
1265deliver_set_expansions(NULL);
1266sender_address = save_sender_address;
1267
1268return local_identity;
1269}
1270
1271
1272
1273/* This routine is a callback that is called from transport_check_waiting.
1274This function will evaluate the incoming message versus the previous
1275message. If the incoming message is using a different local identity then
1276we will veto this new message. */
1277
1278static BOOL
1279smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare)
1280{
dadff1d4
HSHR
1281uschar * message_local_identity,
1282 * current_local_identity,
1283 * new_sender_address;
1284
1285current_local_identity =
a39bd74d 1286 smtp_local_identity(s_compare->current_sender_address, s_compare->tblock);
a39bd74d 1287
dadff1d4
HSHR
1288if (!(new_sender_address = deliver_get_sender_address(message_id)))
1289 return 0;
1290
1291message_local_identity =
1292 smtp_local_identity(new_sender_address, s_compare->tblock);
a39bd74d
JB
1293
1294return Ustrcmp(current_local_identity, message_local_identity) == 0;
1295}
1296
1297
1298
9094b84b
JH
1299uschar
1300ehlo_response(uschar * buf, size_t bsize, uschar checks)
1301{
1302#ifdef SUPPORT_TLS
ff5aac2b
JH
1303if ( checks & PEER_OFFERED_TLS
1304 && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1305 checks &= ~PEER_OFFERED_TLS;
9094b84b
JH
1306#endif
1307
ff5aac2b
JH
1308if ( checks & PEER_OFFERED_IGNQ
1309 && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0,
1310 PCRE_EOPT, NULL, 0) < 0)
1311 checks &= ~PEER_OFFERED_IGNQ;
9094b84b 1312
f98442df
JH
1313if ( checks & PEER_OFFERED_CHUNKING
1314 && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1315 checks &= ~PEER_OFFERED_CHUNKING;
1316
9094b84b 1317#ifndef DISABLE_PRDR
ff5aac2b
JH
1318if ( checks & PEER_OFFERED_PRDR
1319 && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1320 checks &= ~PEER_OFFERED_PRDR;
9094b84b
JH
1321#endif
1322
1323#ifdef SUPPORT_I18N
ff5aac2b
JH
1324if ( checks & PEER_OFFERED_UTF8
1325 && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1326 checks &= ~PEER_OFFERED_UTF8;
9094b84b
JH
1327#endif
1328
ff5aac2b
JH
1329if ( checks & PEER_OFFERED_DSN
1330 && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1331 checks &= ~PEER_OFFERED_DSN;
9094b84b 1332
ff5aac2b
JH
1333if ( checks & PEER_OFFERED_PIPE
1334 && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0,
1335 PCRE_EOPT, NULL, 0) < 0)
1336 checks &= ~PEER_OFFERED_PIPE;
9094b84b 1337
ff5aac2b
JH
1338if ( checks & PEER_OFFERED_SIZE
1339 && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1340 checks &= ~PEER_OFFERED_SIZE;
9094b84b
JH
1341
1342return checks;
1343}
1344
1345
6d5c916c
JH
1346
1347/* Callback for emitting a BDAT data chunk header.
6d5c916c 1348
e027f545
JH
1349If given a nonzero size, first flush any buffered SMTP commands
1350then emit the command.
1351
1352Reap previous SMTP command responses if requested.
1353Reap one SMTP command response if requested.
6d5c916c
JH
1354
1355Returns: OK or ERROR
1356*/
1357
1358static int
1359smtp_chunk_cmd_callback(int fd, transport_ctx * tctx,
e027f545 1360 unsigned chunk_size, unsigned flags)
6d5c916c
JH
1361{
1362smtp_transport_options_block * ob =
1363 (smtp_transport_options_block *)(tctx->tblock->options_block);
e027f545
JH
1364int cmd_count = 0;
1365int prev_cmd_count;
1366uschar * buffer = tctx->buffer;
df5b41e3 1367smtp_context sx;
6d5c916c 1368
6d5c916c 1369
e027f545 1370/* Write SMTP chunk header command */
6d5c916c 1371
e027f545 1372if (chunk_size > 0)
87cb4a16 1373 {
e027f545
JH
1374 if((cmd_count = smtp_write_command(tctx->outblock, FALSE, "BDAT %u%s\r\n",
1375 chunk_size,
1376 flags & tc_chunk_last ? " LAST" : "")
1377 ) < 0) return ERROR;
87cb4a16
JH
1378 if (flags & tc_chunk_last)
1379 data_command = string_copy(big_buffer); /* Save for later error message */
1380 }
e027f545
JH
1381
1382prev_cmd_count = cmd_count += tctx->cmd_count;
6d5c916c 1383
e027f545 1384/* Reap responses for any previous, but not one we just emitted */
6d5c916c 1385
e027f545
JH
1386if (chunk_size > 0)
1387 prev_cmd_count--;
1388if (tctx->pending_BDAT)
1389 prev_cmd_count--;
6d5c916c 1390
e027f545 1391if (flags & tc_reap_prev && prev_cmd_count > 0)
6d5c916c 1392 {
df5b41e3
JH
1393 sx.first_addr = tctx->first_addr;
1394 sx.tblock = tctx->tblock;
1395 sx.sync_addr = *tctx->sync_addr;
1396 sx.host = tctx->host;
1397 sx.pending_MAIL = tctx->pending_MAIL;
1398 sx.inblock = *tctx->inblock;
1399
58fc5fb2
JH
1400 DEBUG(D_transport) debug_printf("look for %d responses"
1401 " for previous pipelined cmds\n", prev_cmd_count);
6d5c916c 1402
df5b41e3 1403 switch(sync_responses(&sx, prev_cmd_count, 0))
e027f545
JH
1404 {
1405 case 1: /* 2xx (only) => OK */
1406 case 3: tctx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */
1407 case 2: *tctx->completed_address = TRUE; /* 5xx (only) => progress made */
1408 case 0: break; /* No 2xx or 5xx, but no probs */
1409
1410 case -1: /* Timeout on RCPT */
1411 default: return ERROR; /* I/O error, or any MAIL/DATA error */
1412 }
df5b41e3 1413 *tctx->sync_addr = sx.sync_addr;
e027f545
JH
1414 cmd_count = 1;
1415 if (!tctx->pending_BDAT)
1416 pipelining_active = FALSE;
6d5c916c 1417 }
e027f545 1418
58fc5fb2 1419/* Reap response for an outstanding BDAT */
e027f545 1420
58fc5fb2 1421if (tctx->pending_BDAT)
e027f545 1422 {
58fc5fb2
JH
1423 DEBUG(D_transport) debug_printf("look for one response for BDAT\n");
1424
df5b41e3 1425 if (!smtp_read_response(tctx->inblock, sx.buffer, sizeof(sx.buffer), '2',
e027f545
JH
1426 ob->command_timeout))
1427 {
df5b41e3 1428 if (errno == 0 && sx.buffer[0] == '4')
e027f545
JH
1429 {
1430 errno = ERRNO_DATA4XX; /*XXX does this actually get used? */
1431 tctx->first_addr->more_errno |=
df5b41e3 1432 ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
e027f545
JH
1433 }
1434 return ERROR;
1435 }
1436 cmd_count--;
1437 tctx->pending_BDAT = FALSE;
1438 pipelining_active = FALSE;
1439 }
1440else if (chunk_size > 0)
1441 tctx->pending_BDAT = TRUE;
1442
1443
1444tctx->cmd_count = cmd_count;
1445return OK;
6d5c916c
JH
1446}
1447
1448
1449
0756eb3c 1450/*************************************************
d093f8e5 1451* Make connection for given message *
0756eb3c
PH
1452*************************************************/
1453
d093f8e5
JH
1454/*
1455Arguments:
1456 ctx connection context
d093f8e5
JH
1457 suppress_tls if TRUE, don't attempt a TLS connection - this is set for
1458 a second attempt after TLS initialization fails
1459 verify TRUE if connection is for a verify callout, FALSE for
1460 a delivery attempt
1461
1462Returns: 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*/
1471int
02b41d71 1472smtp_setup_conn(smtp_context * sx, BOOL suppress_tls, BOOL verify)
d093f8e5
JH
1473{
1474#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
1475dns_answer tlsa_dnsa;
1476#endif
1477BOOL pass_message = FALSE;
1478
1479uschar * message = NULL;
1480int save_errno;
1481int yield = OK;
1482int rc;
1483
02b41d71 1484sx->ob = (smtp_transport_options_block *) sx->tblock->options_block;
d093f8e5
JH
1485
1486sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0;
1487sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0;
1488sx->ok = FALSE;
1489sx->send_rset = TRUE;
1490sx->send_quit = TRUE;
1491sx->setting_up = TRUE;
1492sx->esmtp = TRUE;
1493sx->esmtp_sent = FALSE;
59a286ef 1494#ifdef SUPPORT_I18N
d093f8e5 1495sx->utf8_needed = FALSE;
59a286ef 1496#endif
d093f8e5 1497sx->dsn_all_lasthop = TRUE;
59a286ef 1498#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
d093f8e5
JH
1499sx->dane = FALSE;
1500sx->dane_required = verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK;
1501#endif
1502
1503if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999;
d093f8e5
JH
1504sx->peer_offered = 0;
1505sx->igquotstr = US"";
02b41d71 1506if (!sx->helo_data) sx->helo_data = sx->ob->helo_data;
d093f8e5
JH
1507#ifdef EXPERIMENTAL_DSN_INFO
1508sx->smtp_greeting = NULL;
1509sx->helo_response = NULL;
59a286ef
JH
1510#endif
1511
0756eb3c 1512smtp_command = US"initial connection";
d093f8e5 1513sx->buffer[0] = '\0';
0756eb3c
PH
1514
1515/* Set up the buffer for reading SMTP response packets. */
1516
d093f8e5
JH
1517sx->inblock.buffer = sx->inbuffer;
1518sx->inblock.buffersize = sizeof(sx->inbuffer);
1519sx->inblock.ptr = sx->inbuffer;
1520sx->inblock.ptrend = sx->inbuffer;
0756eb3c
PH
1521
1522/* Set up the buffer for holding SMTP commands while pipelining */
1523
d093f8e5
JH
1524sx->outblock.buffer = sx->outbuffer;
1525sx->outblock.buffersize = sizeof(sx->outbuffer);
1526sx->outblock.ptr = sx->outbuffer;
1527sx->outblock.cmd_count = 0;
1528sx->outblock.authenticating = FALSE;
0756eb3c 1529
6c512171
PH
1530/* Reset the parameters of a TLS session. */
1531
817d9f57
JH
1532tls_out.bits = 0;
1533tls_out.cipher = NULL; /* the one we may use for this transport */
9d1c15ef
JH
1534tls_out.ourcert = NULL;
1535tls_out.peercert = NULL;
817d9f57
JH
1536tls_out.peerdn = NULL;
1537#if defined(SUPPORT_TLS) && !defined(USE_GNUTLS)
1538tls_out.sni = NULL;
5b456975 1539#endif
018058b2 1540tls_out.ocsp = OCSP_NOT_REQ;
6c512171 1541
35aba663
JH
1542/* Flip the legacy TLS-related variables over to the outbound set in case
1543they're used in the context of the transport. Don't bother resetting
02b41d71
JH
1544afterward (when being used by a transport) as we're in a subprocess.
1545For verify, unflipped once the callout is dealt with */
35aba663
JH
1546
1547tls_modify_variables(&tls_out);
1548
061b7ebd 1549#ifndef SUPPORT_TLS
d093f8e5 1550if (sx->smtps)
061b7ebd 1551 {
d093f8e5 1552 set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available",
895fbaf2 1553 DEFER, FALSE);
018058b2 1554 return ERROR;
061b7ebd
PP
1555 }
1556#endif
1557
0756eb3c
PH
1558/* Make a connection to the host if this isn't a continued delivery, and handle
1559the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled
1560specially so they can be identified for retries. */
1561
1562if (continue_hostname == NULL)
1563 {
02b41d71
JH
1564 if (verify)
1565 HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port);
1566
a7538db1 1567 /* This puts port into host->port */
d093f8e5
JH
1568 sx->inblock.sock = sx->outblock.sock =
1569 smtp_connect(sx->host, sx->host_af, sx->port, sx->interface,
1570 sx->ob->connect_timeout, sx->tblock);
4311097e 1571
d093f8e5 1572 if (sx->inblock.sock < 0)
0756eb3c 1573 {
02b41d71
JH
1574 uschar * msg = NULL;
1575 int save_errno = errno;
1576 if (verify)
1577 {
1578 msg = strerror(errno);
1579 HDEBUG(D_verify) debug_printf("connect: %s\n", msg);
1580 }
1581 set_errno_nohost(sx->addrlist,
1582 save_errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : save_errno,
1583 verify ? string_sprintf("could not connect: %s", msg)
1584 : NULL,
1585 DEFER, FALSE);
1586 sx->send_quit = FALSE;
0756eb3c
PH
1587 return DEFER;
1588 }
1589
0e66b3b6
JH
1590#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
1591 {
0e66b3b6
JH
1592 tls_out.dane_verified = FALSE;
1593 tls_out.tlsa_usage = 0;
1594
d093f8e5 1595 if (sx->host->dnssec == DS_YES)
0e66b3b6 1596 {
d093f8e5
JH
1597 if( sx->dane_required
1598 || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK
0e66b3b6 1599 )
d093f8e5 1600 switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required))
4b0fe319 1601 {
d093f8e5 1602 case OK: sx->dane = TRUE; break;
2d5fdd53 1603 case FAIL_FORCED: break;
d093f8e5 1604 default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
2d5fdd53
JH
1605 string_sprintf("DANE error: tlsa lookup %s",
1606 rc == DEFER ? "DEFER" : "FAIL"),
1607 rc, FALSE);
1608 return rc;
4b0fe319 1609 }
0e66b3b6 1610 }
d093f8e5 1611 else if (sx->dane_required)
0e66b3b6 1612 {
d093f8e5
JH
1613 set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
1614 string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name),
895fbaf2 1615 FAIL, FALSE);
4b0fe319 1616 return FAIL;
0e66b3b6
JH
1617 }
1618
d093f8e5
JH
1619 if (sx->dane)
1620 sx->ob->tls_tempfail_tryclear = FALSE;
0e66b3b6
JH
1621 }
1622#endif /*DANE*/
1623
41c7c167
PH
1624 /* Expand the greeting message while waiting for the initial response. (Makes
1625 sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is
1626 delayed till here so that $sending_interface and $sending_port are set. */
1627
02b41d71
JH
1628 if (sx->helo_data)
1629 if (!(sx->helo_data = expand_string(sx->helo_data)))
1630 if (verify)
1631 log_write(0, LOG_MAIN|LOG_PANIC,
1632 "<%s>: failed to expand transport's helo_data value for callout: %s",
1633 sx->addrlist->address, expand_string_message);
1634
8c5d388a 1635#ifdef SUPPORT_I18N
d093f8e5 1636 if (sx->helo_data)
810d16ad 1637 {
02b41d71
JH
1638 expand_string_message = NULL;
1639 if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data,
1640 &expand_string_message)),
1641 expand_string_message)
1642 if (verify)
1643 log_write(0, LOG_MAIN|LOG_PANIC,
1644 "<%s>: failed to expand transport's helo_data value for callout: %s",
1645 sx->addrlist->address, expand_string_message);
1646 else
1647 sx->helo_data = NULL;
810d16ad
JH
1648 }
1649#endif
41c7c167 1650
0756eb3c
PH
1651 /* The first thing is to wait for an initial OK response. The dreaded "goto"
1652 is nevertheless a reasonably clean way of programming this kind of logic,
1653 where you want to escape on any error. */
1654
d093f8e5 1655 if (!sx->smtps)
061b7ebd 1656 {
8d330698
JH
1657 BOOL good_response;
1658
1659#ifdef TCP_QUICKACK
d093f8e5 1660 (void) setsockopt(sx->inblock.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off));
8d330698 1661#endif
d093f8e5
JH
1662 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
1663 '2', sx->ob->command_timeout);
895fbaf2 1664#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1665 sx->smtp_greeting = string_copy(sx->buffer);
895fbaf2
JH
1666#endif
1667 if (!good_response) goto RESPONSE_FAILED;
0756eb3c 1668
0cbf2b82 1669#ifndef DISABLE_EVENT
b30275b8 1670 {
805c9d53 1671 uschar * s;
d093f8e5
JH
1672 lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes"
1673 : sx->host->dnssec==DS_NO ? US"no" : NULL;
1674 s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer);
b30275b8 1675 if (s)
a7538db1 1676 {
d093f8e5 1677 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL,
b30275b8 1678 string_sprintf("deferred by smtp:connect event expansion: %s", s),
895fbaf2 1679 DEFER, FALSE);
a7538db1
JH
1680 yield = DEFER;
1681 goto SEND_QUIT;
1682 }
b30275b8 1683 }
a7538db1
JH
1684#endif
1685
061b7ebd
PP
1686 /* Now check if the helo_data expansion went well, and sign off cleanly if
1687 it didn't. */
41c7c167 1688
d093f8e5 1689 if (!sx->helo_data)
061b7ebd 1690 {
d093f8e5 1691 message = string_sprintf("failed to expand helo_data: %s",
061b7ebd 1692 expand_string_message);
d093f8e5 1693 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
061b7ebd
PP
1694 yield = DEFER;
1695 goto SEND_QUIT;
1696 }
41c7c167
PH
1697 }
1698
0756eb3c 1699/** Debugging without sending a message
d093f8e5 1700sx->addrlist->transport_return = DEFER;
0756eb3c
PH
1701goto SEND_QUIT;
1702**/
1703
1704 /* Errors that occur after this point follow an SMTP command, which is
1705 left in big_buffer by smtp_write_command() for use in error messages. */
1706
1707 smtp_command = big_buffer;
1708
1709 /* Tell the remote who we are...
1710
1711 February 1998: A convention has evolved that ESMTP-speaking MTAs include the
1712 string "ESMTP" in their greeting lines, so make Exim send EHLO if the
1713 greeting is of this form. The assumption was that the far end supports it
1714 properly... but experience shows that there are some that give 5xx responses,
1715 even though the banner includes "ESMTP" (there's a bloody-minded one that
1716 says "ESMTP not spoken here"). Cope with that case.
1717
1718 September 2000: Time has passed, and it seems reasonable now to always send
1719 EHLO at the start. It is also convenient to make the change while installing
1720 the TLS stuff.
1721
1722 July 2003: Joachim Wieland met a broken server that advertises "PIPELINING"
1723 but times out after sending MAIL FROM, RCPT TO and DATA all together. There
1724 would be no way to send out the mails, so there is now a host list
1725 "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the
1726 PIPELINING problem as well. Maybe it can also be useful to cure other
1727 problems with broken servers.
1728
1729 Exim originally sent "Helo" at this point and ran for nearly a year that way.
1730 Then somebody tried it with a Microsoft mailer... It seems that all other
1731 mailers use upper case for some reason (the RFC is quite clear about case
1732 independence) so, for peace of mind, I gave in. */
1733
d093f8e5 1734 sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK;
0756eb3c 1735
061b7ebd
PP
1736 /* Alas; be careful, since this goto is not an error-out, so conceivably
1737 we might set data between here and the target which we assume to exist
1738 and be usable. I can see this coming back to bite us. */
a7538db1 1739#ifdef SUPPORT_TLS
d093f8e5 1740 if (sx->smtps)
061b7ebd 1741 {
2d14f397 1742 smtp_peer_options |= PEER_OFFERED_TLS;
061b7ebd 1743 suppress_tls = FALSE;
d093f8e5 1744 sx->ob->tls_tempfail_tryclear = FALSE;
061b7ebd
PP
1745 smtp_command = US"SSL-on-connect";
1746 goto TLS_NEGOTIATE;
1747 }
a7538db1 1748#endif
061b7ebd 1749
d093f8e5 1750 if (sx->esmtp)
0756eb3c 1751 {
d093f8e5
JH
1752 if (smtp_write_command(&sx->outblock, FALSE, "%s %s\r\n",
1753 sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0)
0756eb3c 1754 goto SEND_FAILED;
d093f8e5
JH
1755 sx->esmtp_sent = TRUE;
1756 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
1757 sx->ob->command_timeout))
0756eb3c 1758 {
d093f8e5 1759 if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp)
895fbaf2
JH
1760 {
1761#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1762 sx->helo_response = string_copy(sx->buffer);
895fbaf2
JH
1763#endif
1764 goto RESPONSE_FAILED;
1765 }
d093f8e5 1766 sx->esmtp = FALSE;
0756eb3c 1767 }
895fbaf2 1768#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1769 sx->helo_response = string_copy(sx->buffer);
895fbaf2 1770#endif
0756eb3c
PH
1771 }
1772 else
0756eb3c
PH
1773 DEBUG(D_transport)
1774 debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
0756eb3c 1775
d093f8e5 1776 if (!sx->esmtp)
0756eb3c 1777 {
895fbaf2 1778 BOOL good_response;
d093f8e5
JH
1779 int n = sizeof(sx->buffer);
1780 uschar * rsp = sx->buffer;
a57ce043 1781
d093f8e5
JH
1782 if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2)
1783 { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; }
895fbaf2 1784
d093f8e5 1785 if (smtp_write_command(&sx->outblock, FALSE, "HELO %s\r\n", sx->helo_data) < 0)
0756eb3c 1786 goto SEND_FAILED;
d093f8e5
JH
1787 good_response = smtp_read_response(&sx->inblock, rsp, n,
1788 '2', sx->ob->command_timeout);
895fbaf2 1789#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1790 sx->helo_response = string_copy(rsp);
895fbaf2 1791#endif
a57ce043
JH
1792 if (!good_response)
1793 {
1794 /* Handle special logging for a closed connection after HELO
1795 when had previously sent EHLO */
1796
d093f8e5 1797 if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET))
a57ce043 1798 {
d093f8e5 1799 sx->send_quit = FALSE;
a57ce043
JH
1800 save_errno = ERRNO_SMTPCLOSED;
1801 message = string_sprintf("Remote host closed connection "
1802 "in response to %s (EHLO response was: %s)",
d093f8e5 1803 smtp_command, sx->buffer);
a57ce043
JH
1804 goto FAILED;
1805 }
d093f8e5 1806 Ustrncpy(sx->buffer, rsp, sizeof(sx->buffer)/2);
a57ce043
JH
1807 goto RESPONSE_FAILED;
1808 }
0756eb3c
PH
1809 }
1810
d093f8e5 1811 sx->peer_offered = smtp_peer_options = 0;
2d14f397 1812
d093f8e5 1813 if (sx->esmtp || sx->lmtp)
2d14f397 1814 {
d093f8e5 1815 sx->peer_offered = ehlo_response(sx->buffer, Ustrlen(sx->buffer),
ff5aac2b 1816 PEER_OFFERED_TLS /* others checked later */
9094b84b 1817 );
f1513293 1818
0756eb3c
PH
1819 /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */
1820
a7538db1 1821#ifdef SUPPORT_TLS
d093f8e5 1822 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_TLS;
7ade712c 1823#endif
2d14f397 1824 }
0756eb3c
PH
1825 }
1826
1827/* For continuing deliveries down the same channel, the socket is the standard
1828input, and we don't need to redo EHLO here (but may need to do so for TLS - see
1829below). Set up the pointer to where subsequent commands will be left, for
2d14f397 1830error messages. Note that smtp_peer_options will have been
0756eb3c
PH
1831set from the command line if they were set in the process that passed the
1832connection on. */
1833
895fbaf2 1834/*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c
4c04137d 1835as the continue goes via transport_pass_socket() and doublefork and exec.
895fbaf2
JH
1836It does not wait. Unclear how we keep separate host's responses
1837separate - we could match up by host ip+port as a bodge. */
1838
0756eb3c
PH
1839else
1840 {
d093f8e5 1841 sx->inblock.sock = sx->outblock.sock = fileno(stdin);
0756eb3c 1842 smtp_command = big_buffer;
d093f8e5 1843 sx->host->port = sx->port; /* Record the port that was used */
02b41d71 1844 sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */
0756eb3c
PH
1845 }
1846
1847/* If TLS is available on this connection, whether continued or not, attempt to
1848start up a TLS session, unless the host is in hosts_avoid_tls. If successful,
1849send another EHLO - the server may give a different answer in secure mode. We
1850use a separate buffer for reading the response to STARTTLS so that if it is
1851negative, the original EHLO data is available for subsequent analysis, should
1852the client not be required to use TLS. If the response is bad, copy the buffer
1853for error analysis. */
1854
1855#ifdef SUPPORT_TLS
2d14f397 1856if ( smtp_peer_options & PEER_OFFERED_TLS
5130845b 1857 && !suppress_tls
02b41d71
JH
1858 && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK
1859 && ( !verify
1860 || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK
1861 ) )
0756eb3c
PH
1862 {
1863 uschar buffer2[4096];
d093f8e5 1864 if (smtp_write_command(&sx->outblock, FALSE, "STARTTLS\r\n") < 0)
0756eb3c
PH
1865 goto SEND_FAILED;
1866
1867 /* If there is an I/O error, transmission of this message is deferred. If
1868 there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is
1869 false, we also defer. However, if there is a temporary rejection of STARTTLS
1870 and tls_tempfail_tryclear is true, or if there is an outright rejection of
1871 STARTTLS, we carry on. This means we will try to send the message in clear,
1872 unless the host is in hosts_require_tls (tested below). */
1873
d093f8e5
JH
1874 if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2',
1875 sx->ob->command_timeout))
0756eb3c 1876 {
4b0fe319
JH
1877 if ( errno != 0
1878 || buffer2[0] == 0
d093f8e5 1879 || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear)
4b0fe319 1880 )
0dda4340 1881 {
d093f8e5 1882 Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer));
0756eb3c 1883 goto RESPONSE_FAILED;
0dda4340 1884 }
0756eb3c
PH
1885 }
1886
1887 /* STARTTLS accepted: try to negotiate a TLS session. */
1888
1889 else
061b7ebd 1890 TLS_NEGOTIATE:
0756eb3c 1891 {
d093f8e5
JH
1892 address_item * addr;
1893 int rc = tls_client_start(sx->inblock.sock, sx->host, sx->addrlist, sx->tblock
0e66b3b6 1894# ifdef EXPERIMENTAL_DANE
d093f8e5 1895 , sx->dane ? &tlsa_dnsa : NULL
0e66b3b6
JH
1896# endif
1897 );
0756eb3c
PH
1898
1899 /* TLS negotiation failed; give an error. From outside, this function may
1900 be called again to try in clear on a new connection, if the options permit
1901 it for this host. */
1902
1903 if (rc != OK)
1904 {
6ebd79ec 1905# ifdef EXPERIMENTAL_DANE
d093f8e5 1906 if (sx->dane) log_write(0, LOG_MAIN,
4b0fe319 1907 "DANE attempt failed; no TLS connection to %s [%s]",
d093f8e5 1908 sx->host->name, sx->host->address);
6ebd79ec
JH
1909# endif
1910
0756eb3c
PH
1911 save_errno = ERRNO_TLSFAILURE;
1912 message = US"failure while setting up TLS session";
d093f8e5 1913 sx->send_quit = FALSE;
0756eb3c
PH
1914 goto TLS_FAILED;
1915 }
1916
1917 /* TLS session is set up */
1918
2d14f397 1919 smtp_peer_options_wrap = smtp_peer_options;
d093f8e5 1920 for (addr = sx->addrlist; addr; addr = addr->next)
5ca2a9a1
PH
1921 if (addr->transport_return == PENDING_DEFER)
1922 {
817d9f57 1923 addr->cipher = tls_out.cipher;
9d1c15ef
JH
1924 addr->ourcert = tls_out.ourcert;
1925 addr->peercert = tls_out.peercert;
817d9f57 1926 addr->peerdn = tls_out.peerdn;
018058b2 1927 addr->ocsp = tls_out.ocsp;
5ca2a9a1 1928 }
0756eb3c
PH
1929 }
1930 }
1931
061b7ebd
PP
1932/* if smtps, we'll have smtp_command set to something else; always safe to
1933reset it here. */
1934smtp_command = big_buffer;
1935
41c7c167
PH
1936/* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If
1937helo_data is null, we are dealing with a connection that was passed from
1938another process, and so we won't have expanded helo_data above. We have to
1939expand it here. $sending_ip_address and $sending_port are set up right at the
1940start of the Exim process (in exim.c). */
0756eb3c 1941
817d9f57 1942if (tls_out.active >= 0)
0756eb3c 1943 {
061b7ebd 1944 char *greeting_cmd;
895fbaf2
JH
1945 BOOL good_response;
1946
d093f8e5 1947 if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data)))
41c7c167 1948 {
d093f8e5
JH
1949 uschar *message = string_sprintf("failed to expand helo_data: %s",
1950 expand_string_message);
1951 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
1952 yield = DEFER;
1953 goto SEND_QUIT;
41c7c167
PH
1954 }
1955
0d0e4455 1956 /* For SMTPS we need to wait for the initial OK response. */
d093f8e5 1957 if (sx->smtps)
061b7ebd 1958 {
d093f8e5
JH
1959 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
1960 '2', sx->ob->command_timeout);
895fbaf2 1961#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1962 sx->smtp_greeting = string_copy(sx->buffer);
895fbaf2
JH
1963#endif
1964 if (!good_response) goto RESPONSE_FAILED;
0d0e4455
PP
1965 }
1966
d093f8e5 1967 if (sx->esmtp)
0d0e4455
PP
1968 greeting_cmd = "EHLO";
1969 else
1970 {
1971 greeting_cmd = "HELO";
1972 DEBUG(D_transport)
1973 debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
061b7ebd
PP
1974 }
1975
d093f8e5
JH
1976 if (smtp_write_command(&sx->outblock, FALSE, "%s %s\r\n",
1977 sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0)
0756eb3c 1978 goto SEND_FAILED;
d093f8e5
JH
1979 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
1980 '2', sx->ob->command_timeout);
895fbaf2 1981#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1982 sx->helo_response = string_copy(sx->buffer);
895fbaf2
JH
1983#endif
1984 if (!good_response) goto RESPONSE_FAILED;
2d14f397 1985 smtp_peer_options = 0;
0756eb3c
PH
1986 }
1987
1988/* If the host is required to use a secure channel, ensure that we
1989have one. */
1990
d093f8e5 1991else if ( sx->smtps
0e66b3b6 1992# ifdef EXPERIMENTAL_DANE
d093f8e5 1993 || sx->dane
0e66b3b6 1994# endif
d093f8e5 1995 || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK
7a31d643 1996 )
0756eb3c
PH
1997 {
1998 save_errno = ERRNO_TLSREQUIRED;
c562fd30 1999 message = string_sprintf("a TLS session is required, but %s",
2d14f397
JH
2000 smtp_peer_options & PEER_OFFERED_TLS
2001 ? "an attempt to start TLS failed" : "the server did not offer TLS support");
0756eb3c
PH
2002 goto TLS_FAILED;
2003 }
0e66b3b6 2004#endif /*SUPPORT_TLS*/
0756eb3c
PH
2005
2006/* If TLS is active, we have just started it up and re-done the EHLO command,
2007so its response needs to be analyzed. If TLS is not active and this is a
2008continued session down a previously-used socket, we haven't just done EHLO, so
2009we skip this. */
2010
2011if (continue_hostname == NULL
a7538db1 2012#ifdef SUPPORT_TLS
817d9f57 2013 || tls_out.active >= 0
a7538db1 2014#endif
0756eb3c
PH
2015 )
2016 {
d093f8e5 2017 if (sx->esmtp || sx->lmtp)
2d14f397 2018 {
d093f8e5
JH
2019 sx->peer_offered = ehlo_response(sx->buffer, Ustrlen(sx->buffer),
2020 0 /* no TLS */
2021 | (sx->lmtp && sx->ob->lmtp_ignore_quota ? PEER_OFFERED_IGNQ : 0)
2022 | PEER_OFFERED_CHUNKING
2023 | PEER_OFFERED_PRDR
9094b84b 2024#ifdef SUPPORT_I18N
d093f8e5
JH
2025 | (sx->addrlist->prop.utf8_msg ? PEER_OFFERED_UTF8 : 0)
2026 /*XXX if we hand peercaps on to continued-conn processes,
2027 must not depend on this addr */
9094b84b 2028#endif
d093f8e5
JH
2029 | PEER_OFFERED_DSN
2030 | PEER_OFFERED_PIPE
2031 | (sx->ob->size_addition >= 0 ? PEER_OFFERED_SIZE : 0)
9094b84b
JH
2032 );
2033
2d14f397
JH
2034 /* Set for IGNOREQUOTA if the response to LHLO specifies support and the
2035 lmtp_ignore_quota option was set. */
f1513293 2036
d093f8e5 2037 sx->igquotstr = sx->peer_offered & PEER_OFFERED_IGNQ ? US" IGNOREQUOTA" : US"";
f1513293 2038
2d14f397
JH
2039 /* If the response to EHLO specified support for the SIZE parameter, note
2040 this, provided size_addition is non-negative. */
f1513293 2041
d093f8e5 2042 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_SIZE;
0756eb3c 2043
2d14f397
JH
2044 /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched
2045 the current host, esmtp will be false, so PIPELINING can never be used. If
2046 the current host matches hosts_avoid_pipelining, don't do it. */
0756eb3c 2047
d093f8e5
JH
2048 if ( sx->peer_offered & PEER_OFFERED_PIPE
2049 && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK)
2d14f397 2050 smtp_peer_options |= PEER_OFFERED_PIPE;
0756eb3c 2051
2d14f397
JH
2052 DEBUG(D_transport) debug_printf("%susing PIPELINING\n",
2053 smtp_peer_options & PEER_OFFERED_PIPE ? "" : "not ");
0756eb3c 2054
d093f8e5
JH
2055 if ( sx->peer_offered & PEER_OFFERED_CHUNKING
2056 && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK)
2057 sx->peer_offered &= ~PEER_OFFERED_CHUNKING;
f98442df 2058
d093f8e5 2059 if (sx->peer_offered & PEER_OFFERED_CHUNKING)
2d14f397 2060 {DEBUG(D_transport) debug_printf("CHUNKING usable\n");}
0756eb3c 2061
8ccd00b1 2062#ifndef DISABLE_PRDR
d093f8e5
JH
2063 if ( sx->peer_offered & PEER_OFFERED_PRDR
2064 && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK)
2065 sx->peer_offered &= ~PEER_OFFERED_PRDR;
fd98a5c6 2066
d093f8e5 2067 if (sx->peer_offered & PEER_OFFERED_PRDR)
2d14f397 2068 {DEBUG(D_transport) debug_printf("PRDR usable\n");}
fd98a5c6
JH
2069#endif
2070
2d14f397 2071 /* Note if the server supports DSN */
d093f8e5 2072 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_DSN;
2d14f397 2073 DEBUG(D_transport) debug_printf("%susing DSN\n",
d093f8e5 2074 sx->peer_offered & PEER_OFFERED_DSN ? "" : "not ");
6c1c3d1d 2075
2d14f397
JH
2076 /* Note if the response to EHLO specifies support for the AUTH extension.
2077 If it has, check that this host is one we want to authenticate to, and do
2078 the business. The host name and address must be available when the
2079 authenticator's client driver is running. */
0756eb3c 2080
d093f8e5
JH
2081 switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host,
2082 sx->ob, sx->esmtp, &sx->inblock, &sx->outblock))
2d14f397
JH
2083 {
2084 default: goto SEND_QUIT;
2085 case OK: break;
2086 case FAIL_SEND: goto SEND_FAILED;
2087 case FAIL: goto RESPONSE_FAILED;
2088 }
0756eb3c
PH
2089 }
2090 }
2d14f397 2091pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE);
0756eb3c
PH
2092
2093/* The setting up of the SMTP call is now complete. Any subsequent errors are
2094message-specific. */
2095
d093f8e5 2096sx->setting_up = FALSE;
0756eb3c 2097
8c5d388a 2098#ifdef SUPPORT_I18N
d093f8e5 2099if (sx->addrlist->prop.utf8_msg)
9094b84b 2100 {
d093f8e5
JH
2101 sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt
2102 && !sx->addrlist->prop.utf8_downcvt_maybe;
2103 DEBUG(D_transport) if (!sx->utf8_needed)
59a286ef 2104 debug_printf("utf8: %s downconvert\n",
d093f8e5 2105 sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional");
9094b84b
JH
2106 }
2107
7ade712c 2108/* If this is an international message we need the host to speak SMTPUTF8 */
d093f8e5 2109if (sx->utf8_needed && !(sx->peer_offered & PEER_OFFERED_UTF8))
7ade712c
JH
2110 {
2111 errno = ERRNO_UTF8_FWD;
2112 goto RESPONSE_FAILED;
2113 }
2114#endif
2115
d093f8e5
JH
2116return OK;
2117
2118
2119 {
2120 int code;
2121 uschar * set_message;
2122
2123 RESPONSE_FAILED:
2124 {
2125 save_errno = errno;
2126 message = NULL;
2127 sx->send_quit = check_response(sx->host, &save_errno, sx->addrlist->more_errno,
2128 sx->buffer, &code, &message, &pass_message);
2129 goto FAILED;
2130 }
2131
2132 SEND_FAILED:
2133 {
2134 save_errno = errno;
2135 code = '4';
2136 message = US string_sprintf("send() to %s [%s] failed: %s",
2137 sx->host->name, sx->host->address, strerror(save_errno));
2138 sx->send_quit = FALSE;
2139 goto FAILED;
2140 }
2141
2142 /* This label is jumped to directly when a TLS negotiation has failed,
2143 or was not done for a host for which it is required. Values will be set
2144 in message and save_errno, and setting_up will always be true. Treat as
2145 a temporary error. */
2146
2147#ifdef SUPPORT_TLS
2148 TLS_FAILED:
2149 code = '4';
2150#endif
2151
2152 /* The failure happened while setting up the call; see if the failure was
2153 a 5xx response (this will either be on connection, or following HELO - a 5xx
2154 after EHLO causes it to try HELO). If so, fail all addresses, as this host is
2155 never going to accept them. For other errors during setting up (timeouts or
2156 whatever), defer all addresses, and yield DEFER, so that the host is not
2157 tried again for a while. */
2158
2159 FAILED:
2160 sx->ok = FALSE; /* For when reached by GOTO */
2161 set_message = message;
2162
2163 yield = code == '5'
2164#ifdef SUPPORT_I18N
2165 || errno == ERRNO_UTF8_FWD
2166#endif
2167 ? FAIL : DEFER;
2168
2169 set_errno(sx->addrlist, save_errno, set_message, yield, pass_message, sx->host
2170#ifdef EXPERIMENTAL_DSN_INFO
2171 , sx->smtp_greeting, sx->helo_response
2172#endif
2173 );
2174 }
2175
2176
2177SEND_QUIT:
2178
2179if (sx->send_quit)
2180 (void)smtp_write_command(&sx->outblock, FALSE, "QUIT\r\n");
2181
d093f8e5
JH
2182#ifdef SUPPORT_TLS
2183tls_close(FALSE, TRUE);
2184#endif
2185
2186/* Close the socket, and return the appropriate value, first setting
2187works because the NULL setting is passed back to the calling process, and
2188remote_max_parallel is forced to 1 when delivering over an existing connection,
2189
2190If all went well and continue_more is set, we shouldn't actually get here if
2191there are further addresses, as the return above will be taken. However,
2192writing RSET might have failed, or there may be other addresses whose hosts are
2193specified in the transports, and therefore not visible at top level, in which
2194case continue_more won't get set. */
2195
2196HDEBUG(D_transport|D_acl|D_v) debug_printf(" SMTP(close)>>\n");
2197if (sx->send_quit)
2198 {
2199 shutdown(sx->outblock.sock, SHUT_WR);
2200 if (fcntl(sx->inblock.sock, F_SETFL, O_NONBLOCK) == 0)
2201 for (rc = 16; read(sx->inblock.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;)
2202 rc--; /* drain socket */
02b41d71 2203 sx->send_quit = FALSE;
d093f8e5
JH
2204 }
2205(void)close(sx->inblock.sock);
02b41d71 2206sx->inblock.sock = sx->outblock.sock = -1;
d093f8e5
JH
2207
2208#ifndef DISABLE_EVENT
2209(void) event_raise(sx->tblock->event_action, US"tcp:close", NULL);
2210#endif
2211
2212continue_transport = NULL;
2213continue_hostname = NULL;
2214return yield;
2215}
2216
2217
9be4572b
JH
2218
2219
2220/* Create the string of options that will be appended to the MAIL FROM:
2221in the connection context buffer */
2222
2223static int
2224build_mailcmd_options(smtp_context * sx, address_item * addrlist)
2225{
2226uschar * p = sx->buffer;
2227address_item * addr;
2228int address_count;
2229
2230*p = 0;
2231
2232/* If we know the receiving MTA supports the SIZE qualification,
2233send it, adding something to the message size to allow for imprecision
2234and things that get added en route. Exim keeps the number of lines
2235in a message, so we can give an accurate value for the original message, but we
2236need some additional to handle added headers. (Double "." characters don't get
2237included in the count.) */
2238
2239if (sx->peer_offered & PEER_OFFERED_SIZE)
2240 {
2241 sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition);
2242 while (*p) p++;
2243 }
2244
2245#ifndef DISABLE_PRDR
2246/* If it supports Per-Recipient Data Reponses, and we have omre than one recipient,
2247request that */
2248
2249sx->prdr_active = FALSE;
2250if (sx->peer_offered & PEER_OFFERED_PRDR)
2251 for (addr = addrlist; addr; addr = addr->next)
2252 if (addr->transport_return == PENDING_DEFER)
2253 {
2254 for (addr = addr->next; addr; addr = addr->next)
2255 if (addr->transport_return == PENDING_DEFER)
2256 { /* at least two recipients to send */
2257 sx->prdr_active = TRUE;
2258 sprintf(CS p, " PRDR"); p += 5;
2259 break;
2260 }
2261 break;
2262 }
2263#endif
2264
2265#ifdef SUPPORT_I18N
2266/* If it supports internationalised messages, and this meesage need that,
2267request it */
2268
2269if ( sx->peer_offered & PEER_OFFERED_UTF8
2270 && addrlist->prop.utf8_msg
2271 && !addrlist->prop.utf8_downcvt
2272 )
2273 Ustrcpy(p, " SMTPUTF8"), p += 9;
2274#endif
2275
2276/* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */
2277for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0;
2278 addr && address_count < sx->max_rcpt;
2279 addr = addr->next) if (addr->transport_return == PENDING_DEFER)
2280 {
2281 address_count++;
2282 if (!(addr->dsn_flags & rf_dsnlasthop))
2283 {
2284 sx->dsn_all_lasthop = FALSE;
2285 break;
2286 }
2287 }
2288
2289/* Add any DSN flags to the mail command */
2290
2291if (sx->peer_offered & PEER_OFFERED_DSN && !sx->dsn_all_lasthop)
2292 {
2293 if (dsn_ret == dsn_ret_hdrs)
2294 { Ustrcpy(p, " RET=HDRS"); p += 9; }
2295 else if (dsn_ret == dsn_ret_full)
2296 { Ustrcpy(p, " RET=FULL"); p += 9; }
2297
2298 if (dsn_envid)
2299 {
2300 string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid);
2301 while (*p) p++;
2302 }
2303 }
2304
2305/* If an authenticated_sender override has been specified for this transport
2306instance, expand it. If the expansion is forced to fail, and there was already
2307an authenticated_sender for this message, the original value will be used.
2308Other expansion failures are serious. An empty result is ignored, but there is
2309otherwise no check - this feature is expected to be used with LMTP and other
2310cases where non-standard addresses (e.g. without domains) might be required. */
2311
2312if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob))
2313 return ERROR;
2314
2315return OK;
2316}
2317
2318
2319static void
2320build_rcptcmd_options(smtp_context * sx, const address_item * addr)
2321{
2322uschar * p = sx->buffer;
2323*p = 0;
2324
2325/* Add any DSN flags to the rcpt command */
2326
2327if (sx->peer_offered & PEER_OFFERED_DSN && !(addr->dsn_flags & rf_dsnlasthop))
2328 {
2329 if (addr->dsn_flags & rf_dsnflags)
2330 {
2331 int i;
2332 BOOL first = TRUE;
2333
2334 Ustrcpy(p, " NOTIFY=");
2335 while (*p) p++;
2336 for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i])
2337 {
2338 if (!first) *p++ = ',';
2339 first = FALSE;
2340 Ustrcpy(p, rf_names[i]);
2341 while (*p) p++;
2342 }
2343 }
2344
2345 if (addr->dsn_orcpt)
2346 {
2347 string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s",
2348 addr->dsn_orcpt);
2349 while (*p) p++;
2350 }
2351 }
2352}
2353
2354
d9c3c8ed
JH
2355
2356/*
2357Return:
2358 0 good
2359 -1 MAIL response error, any read i/o error
2360 -2 non-MAIL response timeout
2361 -3 internal error; channel still usable
2362 -4 transmit failed
2363 */
2364
2365int
2366smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield)
2367{
2368address_item * addr;
2369int address_count;
2370int rc;
2371
2372if (build_mailcmd_options(sx, sx->first_addr) != OK)
2373 {
2374 *yield = ERROR;
2375 return -3;
2376 }
2377
2378/* From here until we send the DATA command, we can make use of PIPELINING
2379if the server host supports it. The code has to be able to check the responses
2380at any point, for when the buffer fills up, so we write it totally generally.
2381When PIPELINING is off, each command written reports that it has flushed the
2382buffer. */
2383
2384sx->pending_MAIL = TRUE; /* The block starts with MAIL */
2385
2386 {
2387 uschar * s = sx->from_addr;
2388#ifdef SUPPORT_I18N
2389 uschar * errstr = NULL;
2390
2391 /* If we must downconvert, do the from-address here. Remember we had to
2392 for the to-addresses (done below), and also (ugly) for re-doing when building
2393 the delivery log line. */
2394
2395 if ( sx->addrlist->prop.utf8_msg
2396 && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & PEER_OFFERED_UTF8))
2397 )
2398 {
2399 if (s = string_address_utf8_to_alabel(s, &errstr), errstr)
2400 {
2401 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE);
2402 *yield = ERROR;
2403 return -3;
2404 }
2405 setflag(sx->addrlist, af_utf8_downcvt);
2406 }
2407#endif
2408
2409 rc = smtp_write_command(&sx->outblock, pipelining_active,
2410 "MAIL FROM:<%s>%s\r\n", s, sx->buffer);
2411 }
2412
2413mail_command = string_copy(big_buffer); /* Save for later error message */
2414
2415switch(rc)
2416 {
2417 case -1: /* Transmission error */
2418 return -4;
2419
df5b41e3 2420 case +1: /* Cmd was sent */
d9c3c8ed
JH
2421 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
2422 sx->ob->command_timeout))
2423 {
2424 if (errno == 0 && sx->buffer[0] == '4')
2425 {
2426 errno = ERRNO_MAIL4XX;
2427 sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
2428 }
2429 return -1;
2430 }
2431 sx->pending_MAIL = FALSE;
2432 break;
2433 }
2434
2435/* Pass over all the relevant recipient addresses for this host, which are the
2436ones that have status PENDING_DEFER. If we are using PIPELINING, we can send
2437several before we have to read the responses for those seen so far. This
2438checking is done by a subroutine because it also needs to be done at the end.
2439Send only up to max_rcpt addresses at a time, leaving next_addr pointing to
2440the next one if not all are sent.
2441
2442In the MUA wrapper situation, we want to flush the PIPELINING buffer for the
2443last address because we want to abort if any recipients have any kind of
2444problem, temporary or permanent. We know that all recipient addresses will have
2445the PENDING_DEFER status, because only one attempt is ever made, and we know
2446that max_rcpt will be large, so all addresses will be done at once. */
2447
2448for (addr = sx->first_addr, address_count = 0;
2449 addr && address_count < sx->max_rcpt;
2450 addr = addr->next) if (addr->transport_return == PENDING_DEFER)
2451 {
2452 int count;
2453 BOOL no_flush;
2454 uschar * rcpt_addr;
2455
2456 addr->dsn_aware = sx->peer_offered & PEER_OFFERED_DSN
2457 ? dsn_support_yes : dsn_support_no;
2458
2459 address_count++;
2460 no_flush = pipelining_active && (!mua_wrapper || addr->next);
2461
2462 build_rcptcmd_options(sx, addr);
2463
2464 /* Now send the RCPT command, and process outstanding responses when
2465 necessary. After a timeout on RCPT, we just end the function, leaving the
2466 yield as OK, because this error can often mean that there is a problem with
2467 just one address, so we don't want to delay the host. */
2468
2469 rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes);
2470
2471#ifdef SUPPORT_I18N
2472 if ( testflag(sx->addrlist, af_utf8_downcvt)
2473 && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL))
2474 )
2475 {
2476 /*XXX could we use a per-address errstr here? Not fail the whole send? */
2477 errno = ERRNO_EXPANDFAIL;
2478 return -4; /*XXX too harsh? */
2479 }
2480#endif
2481
2482 count = smtp_write_command(&sx->outblock, no_flush, "RCPT TO:<%s>%s%s\r\n",
2483 rcpt_addr, sx->igquotstr, sx->buffer);
2484
2485 if (count < 0) return -4;
2486 if (count > 0)
2487 {
df5b41e3 2488 switch(sync_responses(sx, count, 0))
d9c3c8ed
JH
2489 {
2490 case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */
2491 case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */
2492 break;
2493
2494 case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
2495 if (!sx->lmtp) /* can't tell about progress yet */
2496 sx->completed_addr = TRUE;
2497 case 0: /* No 2xx or 5xx, but no probs */
2498 break;
2499
2500 case -1: return -2; /* Timeout on RCPT */
2501 default: return -1; /* I/O error, or any MAIL error */
2502 }
2503 sx->pending_MAIL = FALSE; /* Dealt with MAIL */
2504 }
2505 } /* Loop for next address */
2506
2507sx->next_addr = addr;
2508return 0;
2509}
2510
2511
d093f8e5
JH
2512/*************************************************
2513* Deliver address list to given host *
2514*************************************************/
2515
2516/* If continue_hostname is not null, we get here only when continuing to
2517deliver down an existing channel. The channel was passed as the standard
2518input. TLS is never active on a passed channel; the previous process always
2519closes it down before passing the connection on.
2520
2521Otherwise, we have to make a connection to the remote host, and do the
2522initial protocol exchange.
2523
2524When running as an MUA wrapper, if the sender or any recipient is rejected,
2525temporarily or permanently, we force failure for all recipients.
2526
2527Arguments:
2528 addrlist chain of potential addresses to deliver; only those whose
2529 transport_return field is set to PENDING_DEFER are currently
2530 being processed; others should be skipped - they have either
2531 been delivered to an earlier host or IP address, or been
2532 failed by one of them.
2533 host host to deliver to
2534 host_af AF_INET or AF_INET6
2535 port default TCP/IP port to use, in host byte order
2536 interface interface to bind to, or NULL
2537 tblock transport instance block
2538 message_defer set TRUE if yield is OK, but all addresses were deferred
2539 because of a non-recipient, non-host failure, that is, a
2540 4xx response to MAIL FROM, DATA, or ".". This is a defer
2541 that is specific to the message.
2542 suppress_tls if TRUE, don't attempt a TLS connection - this is set for
2543 a second attempt after TLS initialization fails
2544
2545Returns: OK - the connection was made and the delivery attempted;
2546 the result for each address is in its data block.
2547 DEFER - the connection could not be made, or something failed
2548 while setting up the SMTP session, or there was a
2549 non-message-specific error, such as a timeout.
2550 ERROR - a filter command is specified for this transport,
2551 and there was a problem setting it up; OR helo_data
2552 or add_headers or authenticated_sender is specified
2553 for this transport, and the string failed to expand
2554*/
2555
2556static int
2557smtp_deliver(address_item *addrlist, host_item *host, int host_af, int port,
2558 uschar *interface, transport_instance *tblock,
2559 BOOL *message_defer, BOOL suppress_tls)
2560{
2561address_item *addr;
d093f8e5 2562int yield = OK;
d093f8e5
JH
2563int save_errno;
2564int rc;
2565time_t start_delivery_time = time(NULL);
2566
d093f8e5
JH
2567BOOL pass_message = FALSE;
2568uschar *message = NULL;
2569uschar new_message_id[MESSAGE_ID_LENGTH + 1];
2570uschar *p;
2571
2572smtp_context sx;
2573
2574suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */
02b41d71 2575*message_defer = FALSE;
d093f8e5
JH
2576
2577sx.addrlist = addrlist;
2578sx.host = host;
2579sx.host_af = host_af,
2580sx.port = port;
2581sx.interface = interface;
02b41d71 2582sx.helo_data = NULL;
d093f8e5
JH
2583sx.tblock = tblock;
2584
9be4572b
JH
2585/* Get the channel set up ready for a message (MAIL FROM being the next
2586SMTP command to send */
2587
02b41d71 2588if ((rc = smtp_setup_conn(&sx, suppress_tls, FALSE)) != OK)
d093f8e5
JH
2589 return rc;
2590
0756eb3c
PH
2591/* If there is a filter command specified for this transport, we can now
2592set it up. This cannot be done until the identify of the host is known. */
2593
2594if (tblock->filter_command != NULL)
2595 {
2596 BOOL rc;
76ac1b5b
JH
2597 uschar fbuf[64];
2598 sprintf(CS fbuf, "%.50s transport", tblock->name);
0756eb3c 2599 rc = transport_set_up_command(&transport_filter_argv, tblock->filter_command,
76ac1b5b 2600 TRUE, DEFER, addrlist, fbuf, NULL);
9b989985 2601 transport_filter_timeout = tblock->filter_timeout;
0756eb3c
PH
2602
2603 /* On failure, copy the error to all addresses, abandon the SMTP call, and
2604 yield ERROR. */
2605
2606 if (!rc)
2607 {
895fbaf2
JH
2608 set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER,
2609 FALSE);
0756eb3c
PH
2610 yield = ERROR;
2611 goto SEND_QUIT;
2612 }
48f1c853
JH
2613
2614 if ( transport_filter_argv
2615 && *transport_filter_argv
2616 && **transport_filter_argv
d093f8e5 2617 && sx.peer_offered & PEER_OFFERED_CHUNKING
48f1c853
JH
2618 )
2619 {
d093f8e5 2620 sx.peer_offered &= ~PEER_OFFERED_CHUNKING;
48f1c853
JH
2621 DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n");
2622 }
0756eb3c
PH
2623 }
2624
2625
2626/* For messages that have more than the maximum number of envelope recipients,
2627we want to send several transactions down the same SMTP connection. (See
2628comments in deliver.c as to how this reconciles, heuristically, with
2629remote_max_parallel.) This optimization was added to Exim after the following
2630code was already working. The simplest way to put it in without disturbing the
2631code was to use a goto to jump back to this point when there is another
2632transaction to handle. */
2633
2634SEND_MESSAGE:
d9c3c8ed
JH
2635sx.from_addr = return_path;
2636sx.first_addr = sx.sync_addr = addrlist;
d093f8e5
JH
2637sx.ok = FALSE;
2638sx.send_rset = TRUE;
d9c3c8ed 2639sx.completed_addr = FALSE;
0756eb3c
PH
2640
2641
9be4572b 2642/* Initiate a message transfer. */
6b62e899 2643
d9c3c8ed 2644switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield))
0756eb3c 2645 {
d9c3c8ed
JH
2646 case 0: break;
2647 case -1: goto RESPONSE_FAILED;
2648 case -2: goto END_OFF;
2649 case -3: goto SEND_QUIT;
2650 default: goto SEND_FAILED;
0756eb3c
PH
2651 }
2652
0756eb3c
PH
2653/* If we are an MUA wrapper, abort if any RCPTs were rejected, either
2654permanently or temporarily. We should have flushed and synced after the last
2655RCPT. */
2656
2657if (mua_wrapper)
2658 {
2659 address_item *badaddr;
d9c3c8ed 2660 for (badaddr = sx.first_addr; badaddr; badaddr = badaddr->next)
168dec3b
JH
2661 if (badaddr->transport_return != PENDING_OK)
2662 {
2663 /*XXX could we find a better errno than 0 here? */
895fbaf2
JH
2664 set_errno_nohost(addrlist, 0, badaddr->message, FAIL,
2665 testflag(badaddr, af_pass_message));
d093f8e5 2666 sx.ok = FALSE;
168dec3b
JH
2667 break;
2668 }
0756eb3c
PH
2669 }
2670
2671/* If ok is TRUE, we know we have got at least one good recipient, and must now
2672send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still
2673have a good recipient buffered up if we are pipelining. We don't want to waste
2674time sending DATA needlessly, so we only send it if either ok is TRUE or if we
6d5c916c
JH
2675are pipelining. The responses are all handled by sync_responses().
2676If using CHUNKING, do not send a BDAT until we know how big a chunk we want
2677to send is. */
0756eb3c 2678
d093f8e5
JH
2679if ( !(sx.peer_offered & PEER_OFFERED_CHUNKING)
2680 && (sx.ok || (pipelining_active && !mua_wrapper)))
0756eb3c 2681 {
d093f8e5 2682 int count = smtp_write_command(&sx.outblock, FALSE, "DATA\r\n");
6d5c916c 2683
0756eb3c 2684 if (count < 0) goto SEND_FAILED;
df5b41e3 2685 switch(sync_responses(&sx, count, sx.ok ? +1 : -1))
0756eb3c 2686 {
d093f8e5 2687 case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */
d9c3c8ed 2688 case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */
0756eb3c
PH
2689 break;
2690
d093f8e5 2691 case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
d9c3c8ed 2692 if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */
0756eb3c
PH
2693 case 0: break; /* No 2xx or 5xx, but no probs */
2694
2695 case -1: goto END_OFF; /* Timeout on RCPT */
2696 default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */
2697 }
0d9fa8c0 2698 pipelining_active = FALSE;
87cb4a16 2699 data_command = string_copy(big_buffer); /* Save for later error message */
0756eb3c
PH
2700 }
2701
0756eb3c
PH
2702/* If there were no good recipients (but otherwise there have been no
2703problems), just set ok TRUE, since we have handled address-specific errors
2704already. Otherwise, it's OK to send the message. Use the check/escape mechanism
2705for handling the SMTP dot-handling protocol, flagging to apply to headers as
2706well as body. Set the appropriate timeout value to be used for each chunk.
2707(Haven't been able to make it work using select() for writing yet.) */
2708
d093f8e5 2709if (!(sx.peer_offered & PEER_OFFERED_CHUNKING) && !sx.ok)
6d5c916c
JH
2710 {
2711 /* Save the first address of the next batch. */
d9c3c8ed 2712 sx.first_addr = sx.next_addr;
6d5c916c 2713
d093f8e5 2714 sx.ok = TRUE;
6d5c916c 2715 }
ff5aac2b 2716else
0756eb3c 2717 {
6b46ecc6
JH
2718 transport_ctx tctx = {
2719 tblock,
2720 addrlist,
2721 US".", US"..", /* Escaping strings */
65de12cc 2722 topt_use_crlf | topt_escape_headers
6b46ecc6
JH
2723 | (tblock->body_only ? topt_no_headers : 0)
2724 | (tblock->headers_only ? topt_no_body : 0)
2725 | (tblock->return_path_add ? topt_add_return_path : 0)
2726 | (tblock->delivery_date_add ? topt_add_delivery_date : 0)
2727 | (tblock->envelope_to_add ? topt_add_envelope_to : 0)
2728 };
2729
6d5c916c
JH
2730 /* If using CHUNKING we need a callback from the generic transport
2731 support to us, for the sending of BDAT smtp commands and the reaping
2732 of responses. The callback needs a whole bunch of state so set up
2733 a transport-context structure to be passed around. */
2734
d093f8e5 2735 if (sx.peer_offered & PEER_OFFERED_CHUNKING)
59932f7d 2736 {
65de12cc 2737 tctx.check_string = tctx.escape_string = NULL;
6d5c916c
JH
2738 tctx.options |= topt_use_bdat;
2739 tctx.chunk_cb = smtp_chunk_cmd_callback;
d093f8e5
JH
2740 tctx.inblock = &sx.inblock;
2741 tctx.outblock = &sx.outblock;
6d5c916c 2742 tctx.host = host;
d9c3c8ed
JH
2743 tctx.first_addr = sx.first_addr;
2744 tctx.sync_addr = &sx.sync_addr;
d093f8e5 2745 tctx.pending_MAIL = sx.pending_MAIL;
e027f545 2746 tctx.pending_BDAT = FALSE;
d093f8e5 2747 tctx.good_RCPT = sx.ok;
d9c3c8ed 2748 tctx.completed_address = &sx.completed_addr;
e027f545 2749 tctx.cmd_count = 0;
d093f8e5 2750 tctx.buffer = sx.buffer;
59932f7d
JH
2751 }
2752 else
65de12cc 2753 tctx.options |= topt_end_dot;
59932f7d 2754
6d5c916c 2755 /* Save the first address of the next batch. */
d9c3c8ed 2756 sx.first_addr = sx.next_addr;
6d5c916c 2757
e027f545
JH
2758 /* Responses from CHUNKING commands go in buffer. Otherwise,
2759 there has not been a response. */
2760
d093f8e5 2761 sx.buffer[0] = 0;
e027f545 2762
0756eb3c 2763 sigalrm_seen = FALSE;
d093f8e5 2764 transport_write_timeout = sx.ob->data_timeout;
0756eb3c
PH
2765 smtp_command = US"sending data block"; /* For error messages */
2766 DEBUG(D_transport|D_v)
d093f8e5 2767 if (sx.peer_offered & PEER_OFFERED_CHUNKING)
6d5c916c
JH
2768 debug_printf(" will write message using CHUNKING\n");
2769 else
2770 debug_printf(" SMTP>> writing message and terminating \".\"\n");
0756eb3c 2771 transport_count = 0;
a7538db1 2772
80a47a2c 2773#ifndef DISABLE_DKIM
d093f8e5 2774 sx.ok = dkim_transport_write_message(sx.inblock.sock, &tctx, &sx.ob->dkim);
4cd12fe9 2775#else
d093f8e5 2776 sx.ok = transport_write_message(sx.inblock.sock, &tctx, 0);
4cd12fe9 2777#endif
0756eb3c
PH
2778
2779 /* transport_write_message() uses write() because it is called from other
2780 places to write to non-sockets. This means that under some OS (e.g. Solaris)
2781 it can exit with "Broken pipe" as its error. This really means that the
2782 socket got closed at the far end. */
2783
2784 transport_write_timeout = 0; /* for subsequent transports */
2785
2786 /* Failure can either be some kind of I/O disaster (including timeout),
e027f545
JH
2787 or the failure of a transport filter or the expansion of added headers.
2788 Or, when CHUNKING, it can be a protocol-detected failure. */
0756eb3c 2789
d093f8e5 2790 if (!sx.ok)
0756eb3c 2791 goto RESPONSE_FAILED;
0756eb3c
PH
2792
2793 /* We used to send the terminating "." explicitly here, but because of
2794 buffering effects at both ends of TCP/IP connections, you don't gain
2795 anything by keeping it separate, so it might as well go in the final
2796 data buffer for efficiency. This is now done by setting the topt_end_dot
2797 flag above. */
2798
2799 smtp_command = US"end of data";
2800
d093f8e5 2801 if (sx.peer_offered & PEER_OFFERED_CHUNKING && tctx.cmd_count > 1)
6d5c916c
JH
2802 {
2803 /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */
df5b41e3 2804 switch(sync_responses(&sx, tctx.cmd_count-1, 0))
6d5c916c 2805 {
d093f8e5 2806 case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */
d9c3c8ed 2807 case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */
6d5c916c
JH
2808 break;
2809
d093f8e5 2810 case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
d9c3c8ed 2811 if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */
6d5c916c
JH
2812 case 0: break; /* No 2xx or 5xx, but no probs */
2813
2814 case -1: goto END_OFF; /* Timeout on RCPT */
2815 default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */
2816 }
2817 }
2818
8ccd00b1 2819#ifndef DISABLE_PRDR
fd98a5c6
JH
2820 /* For PRDR we optionally get a partial-responses warning
2821 * followed by the individual responses, before going on with
2822 * the overall response. If we don't get the warning then deal
2823 * with per non-PRDR. */
d093f8e5 2824 if(sx.prdr_active)
fd98a5c6 2825 {
d093f8e5
JH
2826 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3',
2827 sx.ob->final_timeout);
2828 if (!sx.ok && errno == 0) switch(sx.buffer[0])
e027f545 2829 {
d093f8e5
JH
2830 case '2': sx.prdr_active = FALSE;
2831 sx.ok = TRUE;
e027f545
JH
2832 break;
2833 case '4': errno = ERRNO_DATA4XX;
2834 addrlist->more_errno |=
d093f8e5 2835 ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
e027f545
JH
2836 break;
2837 }
fd98a5c6
JH
2838 }
2839 else
2840#endif
2841
2842 /* For non-PRDR SMTP, we now read a single response that applies to the
2843 whole message. If it is OK, then all the addresses have been delivered. */
0756eb3c 2844
d093f8e5 2845 if (!sx.lmtp)
e97957bc 2846 {
d093f8e5
JH
2847 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
2848 sx.ob->final_timeout);
2849 if (!sx.ok && errno == 0 && sx.buffer[0] == '4')
e97957bc
PH
2850 {
2851 errno = ERRNO_DATA4XX;
d093f8e5 2852 addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
e97957bc
PH
2853 }
2854 }
0756eb3c
PH
2855
2856 /* For LMTP, we get back a response for every RCPT command that we sent;
2857 some may be accepted and some rejected. For those that get a response, their
2858 status is fixed; any that are accepted have been handed over, even if later
2859 responses crash - at least, that's how I read RFC 2033.
2860
2861 If all went well, mark the recipient addresses as completed, record which
2862 host/IPaddress they were delivered to, and cut out RSET when sending another
2863 message down the same channel. Write the completed addresses to the journal
2864 now so that they are recorded in case there is a crash of hardware or
2865 software before the spool gets updated. Also record the final SMTP
2866 confirmation if needed (for SMTP only). */
2867
d093f8e5 2868 if (sx.ok)
0756eb3c
PH
2869 {
2870 int flag = '=';
2871 int delivery_time = (int)(time(NULL) - start_delivery_time);
2872 int len;
0756eb3c 2873 uschar *conf = NULL;
0d9fa8c0 2874
d093f8e5 2875 sx.send_rset = FALSE;
0d9fa8c0 2876 pipelining_active = FALSE;
0756eb3c 2877
0756eb3c
PH
2878 /* Set up confirmation if needed - applies only to SMTP */
2879
d68218c7 2880 if (
0cbf2b82 2881#ifdef DISABLE_EVENT
6c6d6e48 2882 LOGGING(smtp_confirmation) &&
a7538db1 2883#endif
d093f8e5 2884 !sx.lmtp
d68218c7 2885 )
0756eb3c 2886 {
d093f8e5 2887 const uschar *s = string_printing(sx.buffer);
55414b25 2888 /* deconst cast ok here as string_printing was checked to have alloc'n'copied */
d093f8e5 2889 conf = (s == sx.buffer)? (uschar *)string_copy(s) : US s;
0756eb3c
PH
2890 }
2891
fd98a5c6 2892 /* Process all transported addresses - for LMTP or PRDR, read a status for
0756eb3c
PH
2893 each one. */
2894
d9c3c8ed 2895 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
0756eb3c
PH
2896 {
2897 if (addr->transport_return != PENDING_OK) continue;
2898
2899 /* LMTP - if the response fails badly (e.g. timeout), use it for all the
2900 remaining addresses. Otherwise, it's a return code for just the one
75def545
PH
2901 address. For temporary errors, add a retry item for the address so that
2902 it doesn't get tried again too soon. */
0756eb3c 2903
8ccd00b1 2904#ifndef DISABLE_PRDR
d093f8e5 2905 if (sx.lmtp || sx.prdr_active)
fd98a5c6 2906#else
d093f8e5 2907 if (sx.lmtp)
fd98a5c6 2908#endif
0756eb3c 2909 {
d093f8e5
JH
2910 if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
2911 sx.ob->final_timeout))
0756eb3c 2912 {
d093f8e5 2913 if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED;
fd98a5c6 2914 addr->message = string_sprintf(
8ccd00b1 2915#ifndef DISABLE_PRDR
d093f8e5 2916 "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP",
fd98a5c6
JH
2917#else
2918 "LMTP error after %s: %s",
2919#endif
d093f8e5 2920 data_command, string_printing(sx.buffer));
75def545 2921 setflag(addr, af_pass_message); /* Allow message to go to user */
d093f8e5 2922 if (sx.buffer[0] == '5')
75def545
PH
2923 addr->transport_return = FAIL;
2924 else
2925 {
e97957bc 2926 errno = ERRNO_DATA4XX;
d093f8e5 2927 addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
75def545 2928 addr->transport_return = DEFER;
8ccd00b1 2929#ifndef DISABLE_PRDR
d093f8e5 2930 if (!sx.prdr_active)
fd98a5c6
JH
2931#endif
2932 retry_add_item(addr, addr->address_retry_key, 0);
75def545 2933 }
0756eb3c
PH
2934 continue;
2935 }
d9c3c8ed 2936 sx.completed_addr = TRUE; /* NOW we can set this flag */
6c6d6e48 2937 if (LOGGING(smtp_confirmation))
c0ea85ab 2938 {
d093f8e5 2939 const uschar *s = string_printing(sx.buffer);
55414b25 2940 /* deconst cast ok here as string_printing was checked to have alloc'n'copied */
d093f8e5 2941 conf = (s == sx.buffer) ? US string_copy(s) : US s;
c0ea85ab 2942 }
0756eb3c
PH
2943 }
2944
2945 /* SMTP, or success return from LMTP for this address. Pass back the
2d280592 2946 actual host that was used. */
0756eb3c
PH
2947
2948 addr->transport_return = OK;
2949 addr->more_errno = delivery_time;
d427a7f9 2950 addr->host_used = host;
0756eb3c
PH
2951 addr->special_action = flag;
2952 addr->message = conf;
8ccd00b1 2953#ifndef DISABLE_PRDR
d093f8e5 2954 if (sx.prdr_active) addr->flags |= af_prdr_used;
fd98a5c6 2955#endif
d093f8e5 2956 if (sx.peer_offered & PEER_OFFERED_CHUNKING) addr->flags |= af_chunking_used;
0756eb3c
PH
2957 flag = '-';
2958
8ccd00b1 2959#ifndef DISABLE_PRDR
d093f8e5 2960 if (!sx.prdr_active)
fd98a5c6
JH
2961#endif
2962 {
2963 /* Update the journal. For homonymic addresses, use the base address plus
2964 the transport name. See lots of comments in deliver.c about the reasons
2965 for the complications when homonyms are involved. Just carry on after
2966 write error, as it may prove possible to update the spool file later. */
4d8d62b9 2967
fd98a5c6 2968 if (testflag(addr, af_homonym))
d093f8e5 2969 sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
fd98a5c6 2970 else
d093f8e5 2971 sprintf(CS sx.buffer, "%.500s\n", addr->unique);
4d8d62b9 2972
d093f8e5
JH
2973 DEBUG(D_deliver) debug_printf("journalling %s\n", sx.buffer);
2974 len = Ustrlen(CS sx.buffer);
2975 if (write(journal_fd, sx.buffer, len) != len)
fd98a5c6 2976 log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
d093f8e5 2977 "%s: %s", sx.buffer, strerror(errno));
fd98a5c6 2978 }
0756eb3c
PH
2979 }
2980
8ccd00b1 2981#ifndef DISABLE_PRDR
d093f8e5 2982 if (sx.prdr_active)
fd98a5c6
JH
2983 {
2984 /* PRDR - get the final, overall response. For any non-success
2985 upgrade all the address statuses. */
d093f8e5
JH
2986 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
2987 sx.ob->final_timeout);
2988 if (!sx.ok)
fd98a5c6 2989 {
d093f8e5 2990 if(errno == 0 && sx.buffer[0] == '4')
fd98a5c6
JH
2991 {
2992 errno = ERRNO_DATA4XX;
d093f8e5 2993 addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
fd98a5c6 2994 }
d9c3c8ed 2995 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
d093f8e5 2996 if (sx.buffer[0] == '5' || addr->transport_return == OK)
fd98a5c6
JH
2997 addr->transport_return = PENDING_OK; /* allow set_errno action */
2998 goto RESPONSE_FAILED;
2999 }
3000
3001 /* Update the journal, or setup retry. */
d9c3c8ed 3002 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
fd98a5c6 3003 if (addr->transport_return == OK)
9be4572b
JH
3004 {
3005 if (testflag(addr, af_homonym))
3006 sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
3007 else
3008 sprintf(CS sx.buffer, "%.500s\n", addr->unique);
3009
3010 DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer);
3011 len = Ustrlen(CS sx.buffer);
3012 if (write(journal_fd, sx.buffer, len) != len)
3013 log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
3014 "%s: %s", sx.buffer, strerror(errno));
3015 }
3016 else if (addr->transport_return == DEFER)
3017 retry_add_item(addr, addr->address_retry_key, -2);
fd98a5c6
JH
3018 }
3019#endif
3020
0756eb3c
PH
3021 /* Ensure the journal file is pushed out to disk. */
3022
54fc8428 3023 if (EXIMfsync(journal_fd) < 0)
0756eb3c
PH
3024 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
3025 strerror(errno));
3026 }
3027 }
3028
3029
3030/* Handle general (not specific to one address) failures here. The value of ok
3031is used to skip over this code on the falling through case. A timeout causes a
3032deferral. Other errors may defer or fail according to the response code, and
3033may set up a special errno value, e.g. after connection chopped, which is
3034assumed if errno == 0 and there is no text in the buffer. If control reaches
3035here during the setting up phase (i.e. before MAIL FROM) then always defer, as
3036the problem is not related to this specific message. */
3037
d093f8e5 3038if (!sx.ok)
0756eb3c 3039 {
895fbaf2
JH
3040 int code, set_rc;
3041 uschar * set_message;
0756eb3c
PH
3042
3043 RESPONSE_FAILED:
895fbaf2
JH
3044 {
3045 save_errno = errno;
3046 message = NULL;
d093f8e5
JH
3047 sx.send_quit = check_response(host, &save_errno, addrlist->more_errno,
3048 sx.buffer, &code, &message, &pass_message);
895fbaf2
JH
3049 goto FAILED;
3050 }
0756eb3c
PH
3051
3052 SEND_FAILED:
895fbaf2
JH
3053 {
3054 save_errno = errno;
3055 code = '4';
3056 message = US string_sprintf("send() to %s [%s] failed: %s",
3057 host->name, host->address, strerror(save_errno));
d093f8e5 3058 sx.send_quit = FALSE;
895fbaf2
JH
3059 goto FAILED;
3060 }
0756eb3c 3061
0756eb3c 3062 FAILED:
9be4572b
JH
3063 {
3064 BOOL message_error;
0756eb3c 3065
9be4572b
JH
3066 sx.ok = FALSE; /* For when reached by GOTO */
3067 set_message = message;
0756eb3c 3068
e97957bc 3069 /* We want to handle timeouts after MAIL or "." and loss of connection after
0756eb3c 3070 "." specially. They can indicate a problem with the sender address or with
e97957bc
PH
3071 the contents of the message rather than a real error on the connection. These
3072 cases are treated in the same way as a 4xx response. This next bit of code
3073 does the classification. */
0756eb3c 3074
e97957bc
PH
3075 switch(save_errno)
3076 {
3077 case 0:
3078 case ERRNO_MAIL4XX:
3079 case ERRNO_DATA4XX:
250b6871
JH
3080 message_error = TRUE;
3081 break;
0756eb3c 3082
e97957bc 3083 case ETIMEDOUT:
250b6871
JH
3084 message_error = Ustrncmp(smtp_command,"MAIL",4) == 0 ||
3085 Ustrncmp(smtp_command,"end ",4) == 0;
3086 break;
e97957bc
PH
3087
3088 case ERRNO_SMTPCLOSED:
250b6871
JH
3089 message_error = Ustrncmp(smtp_command,"end ",4) == 0;
3090 break;
e97957bc
PH
3091
3092 default:
250b6871
JH
3093 message_error = FALSE;
3094 break;
e97957bc 3095 }
0756eb3c 3096
e97957bc 3097 /* Handle the cases that are treated as message errors. These are:
0756eb3c 3098
e97957bc
PH
3099 (a) negative response or timeout after MAIL
3100 (b) negative response after DATA
3101 (c) negative response or timeout or dropped connection after "."
250b6871 3102 (d) utf8 support required and not offered
0756eb3c 3103
e97957bc
PH
3104 It won't be a negative response or timeout after RCPT, as that is dealt
3105 with separately above. The action in all cases is to set an appropriate
3106 error code for all the addresses, but to leave yield set to OK because the
3107 host itself has not failed. Of course, it might in practice have failed
3108 when we've had a timeout, but if so, we'll discover that at the next
3109 delivery attempt. For a temporary error, set the message_defer flag, and
3110 write to the logs for information if this is not the last host. The error
3111 for the last host will be logged as part of the address's log line. */
3112
3113 if (message_error)
0756eb3c 3114 {
e97957bc 3115 if (mua_wrapper) code = '5'; /* Force hard failure in wrapper mode */
e97957bc
PH
3116
3117 /* If there's an errno, the message contains just the identity of
3118 the host. */
3119
895fbaf2
JH
3120 if (code == '5')
3121 set_rc = FAIL;
3122 else /* Anything other than 5 is treated as temporary */
e97957bc 3123 {
895fbaf2 3124 set_rc = DEFER;
e97957bc
PH
3125 if (save_errno > 0)
3126 message = US string_sprintf("%s: %s", message, strerror(save_errno));
3127 if (host->next != NULL) log_write(0, LOG_MAIN, "%s", message);
c562fd30 3128 msglog_line(host, message);
e97957bc
PH
3129 *message_defer = TRUE;
3130 }
3131 }
3132
3133 /* Otherwise, we have an I/O error or a timeout other than after MAIL or
3134 ".", or some other transportation error. We defer all addresses and yield
3135 DEFER, except for the case of failed add_headers expansion, or a transport
3136 filter failure, when the yield should be ERROR, to stop it trying other
3137 hosts. */
3138
3139 else
3140 {
895fbaf2 3141 set_rc = DEFER;
e97957bc
PH
3142 yield = (save_errno == ERRNO_CHHEADER_FAIL ||
3143 save_errno == ERRNO_FILTER_FAIL)? ERROR : DEFER;
0756eb3c
PH
3144 }
3145 }
895fbaf2
JH
3146
3147 set_errno(addrlist, save_errno, set_message, set_rc, pass_message, host
3148#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 3149 , sx.smtp_greeting, sx.helo_response
895fbaf2
JH
3150#endif
3151 );
0756eb3c
PH
3152 }
3153
3154
3155/* If all has gone well, send_quit will be set TRUE, implying we can end the
3156SMTP session tidily. However, if there were too many addresses to send in one
3157message (indicated by first_addr being non-NULL) we want to carry on with the
3158rest of them. Also, it is desirable to send more than one message down the SMTP
3159connection if there are several waiting, provided we haven't already sent so
3160many as to hit the configured limit. The function transport_check_waiting looks
3161for a waiting message and returns its id. Then transport_pass_socket tries to
3162set up a continued delivery by passing the socket on to another process. The
3163variable send_rset is FALSE if a message has just been successfully transfered.
3164
3165If we are already sending down a continued channel, there may be further
3166addresses not yet delivered that are aimed at the same host, but which have not
3167been passed in this run of the transport. In this case, continue_more will be
3168true, and all we should do is send RSET if necessary, and return, leaving the
3169channel open.
3170
3171However, if no address was disposed of, i.e. all addresses got 4xx errors, we
3172do not want to continue with other messages down the same channel, because that
3173can lead to looping between two or more messages, all with the same,
3174temporarily failing address(es). [The retry information isn't updated yet, so
3175new processes keep on trying.] We probably also don't want to try more of this
3176message's addresses either.
3177
3178If we have started a TLS session, we have to end it before passing the
3179connection to a new process. However, not all servers can handle this (Exim
3180can), so we do not pass such a connection on if the host matches
3181hosts_nopass_tls. */
3182
3183DEBUG(D_transport)
3184 debug_printf("ok=%d send_quit=%d send_rset=%d continue_more=%d "
d093f8e5 3185 "yield=%d first_address is %sNULL\n", sx.ok, sx.send_quit,
d9c3c8ed 3186 sx.send_rset, continue_more, yield, sx.first_addr ? "not " : "");
0756eb3c 3187
d9c3c8ed 3188if (sx.completed_addr && sx.ok && sx.send_quit)
0756eb3c
PH
3189 {
3190 BOOL more;
a39bd74d
JB
3191 smtp_compare_t t_compare;
3192
3193 t_compare.tblock = tblock;
3194 t_compare.current_sender_address = sender_address;
3195
d9c3c8ed 3196 if ( sx.first_addr != NULL
5130845b
JH
3197 || continue_more
3198 || ( ( tls_out.active < 0
d093f8e5 3199 || verify_check_given_host(&sx.ob->hosts_nopass_tls, host) != OK
5130845b 3200 )
0756eb3c
PH
3201 &&
3202 transport_check_waiting(tblock->name, host->name,
a39bd74d
JB
3203 tblock->connection_max_messages, new_message_id, &more,
3204 (oicf)smtp_are_same_identities, (void*)&t_compare)
5130845b 3205 ) )
0756eb3c
PH
3206 {
3207 uschar *msg;
447d236c 3208 BOOL pass_message;
0756eb3c 3209
d093f8e5
JH
3210 if (sx.send_rset)
3211 if (! (sx.ok = smtp_write_command(&sx.outblock, FALSE, "RSET\r\n") >= 0))
0756eb3c
PH
3212 {
3213 msg = US string_sprintf("send() to %s [%s] failed: %s", host->name,
3214 host->address, strerror(save_errno));
d093f8e5 3215 sx.send_quit = FALSE;
0756eb3c 3216 }
d093f8e5
JH
3217 else if (! (sx.ok = smtp_read_response(&sx.inblock, sx.buffer,
3218 sizeof(sx.buffer), '2', sx.ob->command_timeout)))
0756eb3c
PH
3219 {
3220 int code;
d093f8e5 3221 sx.send_quit = check_response(host, &errno, 0, sx.buffer, &code, &msg,
447d236c 3222 &pass_message);
d093f8e5 3223 if (!sx.send_quit)
0756eb3c 3224 {
c562fd30
JH
3225 DEBUG(D_transport) debug_printf("H=%s [%s] %s\n",
3226 host->name, host->address, msg);
0756eb3c
PH
3227 }
3228 }
0756eb3c
PH
3229
3230 /* Either RSET was not needed, or it succeeded */
3231
d093f8e5 3232 if (sx.ok)
0756eb3c 3233 {
d9c3c8ed 3234 if (sx.first_addr != NULL) /* More addresses still to be sent */
0756eb3c
PH
3235 { /* in this run of the transport */
3236 continue_sequence++; /* Causes * in logging */
3237 goto SEND_MESSAGE;
3238 }
3239 if (continue_more) return yield; /* More addresses for another run */
3240
3241 /* Pass the socket to a new Exim process. Before doing so, we must shut
3242 down TLS. Not all MTAs allow for the continuation of the SMTP session
3243 when TLS is shut down. We test for this by sending a new EHLO. If we
3244 don't get a good response, we don't attempt to pass the socket on. */
3245
a7538db1 3246#ifdef SUPPORT_TLS
817d9f57 3247 if (tls_out.active >= 0)
0756eb3c 3248 {
817d9f57 3249 tls_close(FALSE, TRUE);
2d14f397 3250 smtp_peer_options = smtp_peer_options_wrap;
d093f8e5
JH
3251 sx.ok = !sx.smtps
3252 && smtp_write_command(&sx.outblock, FALSE,
3253 "EHLO %s\r\n", sx.helo_data) >= 0
3254 && smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer),
3255 '2', sx.ob->command_timeout);
0756eb3c 3256 }
a7538db1 3257#endif
0756eb3c 3258
4c04137d 3259 /* If the socket is successfully passed, we mustn't send QUIT (or
0756eb3c
PH
3260 indeed anything!) from here. */
3261
895fbaf2
JH
3262/*XXX DSN_INFO: assume likely to do new HELO; but for greet we'll want to
3263propagate it from the initial
3264*/
d093f8e5
JH
3265 if (sx.ok && transport_pass_socket(tblock->name, host->name,
3266 host->address, new_message_id, sx.inblock.sock))
3267 sx.send_quit = FALSE;
0756eb3c
PH
3268 }
3269
3270 /* If RSET failed and there are addresses left, they get deferred. */
3271
d9c3c8ed 3272 else set_errno(sx.first_addr, errno, msg, DEFER, FALSE, host