Testsuite: testcase for continued-delivery with transport hosts_override
[exim.git] / src / src / transports / smtp.c
CommitLineData
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1/*************************************************
2* Exim - an Internet mail transport agent *
3*************************************************/
4
d4e5e70b 5/* Copyright (c) University of Cambridge 1995 - 2017 */
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6/* See the file NOTICE for conditions of use and distribution. */
7
8#include "../exim.h"
9#include "smtp.h"
10
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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[] = {
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18 { "*expand_multi_domain", opt_stringptr | opt_hidden | opt_public,
19 (void *)offsetof(transport_instance, expand_multi_domain) },
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20 { "*expand_retry_include_ip_address", opt_stringptr | opt_hidden,
21 (void *)(offsetof(smtp_transport_options_block, expand_retry_include_ip_address)) },
22
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23 { "address_retry_include_sender", opt_bool,
24 (void *)offsetof(smtp_transport_options_block, address_retry_include_sender) },
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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) },
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29 { "authenticated_sender_force", opt_bool,
30 (void *)offsetof(smtp_transport_options_block, authenticated_sender_force) },
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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
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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) },
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63 { "dscp", opt_stringptr,
64 (void *)offsetof(smtp_transport_options_block, dscp) },
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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) },
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77 { "hosts_avoid_pipelining", opt_stringptr,
78 (void *)offsetof(smtp_transport_options_block, hosts_avoid_pipelining) },
80a47a2c 79#ifdef SUPPORT_TLS
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80 { "hosts_avoid_tls", opt_stringptr,
81 (void *)offsetof(smtp_transport_options_block, hosts_avoid_tls) },
80a47a2c 82#endif
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83 { "hosts_max_try", opt_int,
84 (void *)offsetof(smtp_transport_options_block, hosts_max_try) },
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85 { "hosts_max_try_hardlimit", opt_int,
86 (void *)offsetof(smtp_transport_options_block, hosts_max_try_hardlimit) },
80a47a2c 87#ifdef SUPPORT_TLS
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88 { "hosts_nopass_tls", opt_stringptr,
89 (void *)offsetof(smtp_transport_options_block, hosts_nopass_tls) },
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90 { "hosts_noproxy_tls", opt_stringptr,
91 (void *)offsetof(smtp_transport_options_block, hosts_noproxy_tls) },
80a47a2c 92#endif
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93 { "hosts_override", opt_bool,
94 (void *)offsetof(smtp_transport_options_block, hosts_override) },
95 { "hosts_randomize", opt_bool,
96 (void *)offsetof(smtp_transport_options_block, hosts_randomize) },
f2de3a33 97#if defined(SUPPORT_TLS) && !defined(DISABLE_OCSP)
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98 { "hosts_request_ocsp", opt_stringptr,
99 (void *)offsetof(smtp_transport_options_block, hosts_request_ocsp) },
100#endif
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101 { "hosts_require_auth", opt_stringptr,
102 (void *)offsetof(smtp_transport_options_block, hosts_require_auth) },
80a47a2c 103#ifdef SUPPORT_TLS
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104# ifdef EXPERIMENTAL_DANE
105 { "hosts_require_dane", opt_stringptr,
106 (void *)offsetof(smtp_transport_options_block, hosts_require_dane) },
107# endif
f2de3a33 108# ifndef DISABLE_OCSP
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109 { "hosts_require_ocsp", opt_stringptr,
110 (void *)offsetof(smtp_transport_options_block, hosts_require_ocsp) },
111# endif
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112 { "hosts_require_tls", opt_stringptr,
113 (void *)offsetof(smtp_transport_options_block, hosts_require_tls) },
80a47a2c 114#endif
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115 { "hosts_try_auth", opt_stringptr,
116 (void *)offsetof(smtp_transport_options_block, hosts_try_auth) },
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117 { "hosts_try_chunking", opt_stringptr,
118 (void *)offsetof(smtp_transport_options_block, hosts_try_chunking) },
7a31d643 119#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
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120 { "hosts_try_dane", opt_stringptr,
121 (void *)offsetof(smtp_transport_options_block, hosts_try_dane) },
122#endif
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123 { "hosts_try_fastopen", opt_stringptr,
124 (void *)offsetof(smtp_transport_options_block, hosts_try_fastopen) },
8ccd00b1 125#ifndef DISABLE_PRDR
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126 { "hosts_try_prdr", opt_stringptr,
127 (void *)offsetof(smtp_transport_options_block, hosts_try_prdr) },
128#endif
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129#ifdef SUPPORT_TLS
130 { "hosts_verify_avoid_tls", opt_stringptr,
131 (void *)offsetof(smtp_transport_options_block, hosts_verify_avoid_tls) },
132#endif
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133 { "interface", opt_stringptr,
134 (void *)offsetof(smtp_transport_options_block, interface) },
135 { "keepalive", opt_bool,
136 (void *)offsetof(smtp_transport_options_block, keepalive) },
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137 { "lmtp_ignore_quota", opt_bool,
138 (void *)offsetof(smtp_transport_options_block, lmtp_ignore_quota) },
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139 { "max_rcpt", opt_int | opt_public,
140 (void *)offsetof(transport_instance, max_addresses) },
506900af 141 { "multi_domain", opt_expand_bool | opt_public,
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142 (void *)offsetof(transport_instance, multi_domain) },
143 { "port", opt_stringptr,
144 (void *)offsetof(smtp_transport_options_block, port) },
145 { "protocol", opt_stringptr,
146 (void *)offsetof(smtp_transport_options_block, protocol) },
9c695f6d 147 { "retry_include_ip_address", opt_expand_bool,
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148 (void *)offsetof(smtp_transport_options_block, retry_include_ip_address) },
149 { "serialize_hosts", opt_stringptr,
150 (void *)offsetof(smtp_transport_options_block, serialize_hosts) },
151 { "size_addition", opt_int,
152 (void *)offsetof(smtp_transport_options_block, size_addition) }
f0989ec0 153#ifdef SUPPORT_SOCKS
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154 ,{ "socks_proxy", opt_stringptr,
155 (void *)offsetof(smtp_transport_options_block, socks_proxy) }
156#endif
80a47a2c 157#ifdef SUPPORT_TLS
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158 ,{ "tls_certificate", opt_stringptr,
159 (void *)offsetof(smtp_transport_options_block, tls_certificate) },
160 { "tls_crl", opt_stringptr,
161 (void *)offsetof(smtp_transport_options_block, tls_crl) },
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162 { "tls_dh_min_bits", opt_int,
163 (void *)offsetof(smtp_transport_options_block, tls_dh_min_bits) },
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164 { "tls_privatekey", opt_stringptr,
165 (void *)offsetof(smtp_transport_options_block, tls_privatekey) },
3f0945ff 166 { "tls_require_ciphers", opt_stringptr,
0756eb3c 167 (void *)offsetof(smtp_transport_options_block, tls_require_ciphers) },
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168 { "tls_sni", opt_stringptr,
169 (void *)offsetof(smtp_transport_options_block, tls_sni) },
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170 { "tls_tempfail_tryclear", opt_bool,
171 (void *)offsetof(smtp_transport_options_block, tls_tempfail_tryclear) },
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172 { "tls_try_verify_hosts", opt_stringptr,
173 (void *)offsetof(smtp_transport_options_block, tls_try_verify_hosts) },
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174 { "tls_verify_cert_hostnames", opt_stringptr,
175 (void *)offsetof(smtp_transport_options_block,tls_verify_cert_hostnames)},
0756eb3c 176 { "tls_verify_certificates", opt_stringptr,
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177 (void *)offsetof(smtp_transport_options_block, tls_verify_certificates) },
178 { "tls_verify_hosts", opt_stringptr,
179 (void *)offsetof(smtp_transport_options_block, tls_verify_hosts) }
80a47a2c 180#endif
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181};
182
183/* Size of the options list. An extern variable has to be used so that its
184address can appear in the tables drtables.c. */
185
186int smtp_transport_options_count =
187 sizeof(smtp_transport_options)/sizeof(optionlist);
188
189/* Default private options block for the smtp transport. */
190
191smtp_transport_options_block smtp_transport_option_defaults = {
192 NULL, /* hosts */
193 NULL, /* fallback_hosts */
194 NULL, /* hostlist */
195 NULL, /* fallback_hostlist */
196 NULL, /* authenticated_sender */
197 US"$primary_hostname", /* helo_data */
198 NULL, /* interface */
199 NULL, /* port */
200 US"smtp", /* protocol */
9e4f5962 201 NULL, /* DSCP */
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202 NULL, /* serialize_hosts */
203 NULL, /* hosts_try_auth */
204 NULL, /* hosts_require_auth */
f98442df 205 US"*", /* hosts_try_chunking */
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206#ifdef EXPERIMENTAL_DANE
207 NULL, /* hosts_try_dane */
7a31d643 208 NULL, /* hosts_require_dane */
96e47838 209#endif
fb05276a 210 NULL, /* hosts_try_fastopen */
8ccd00b1 211#ifndef DISABLE_PRDR
f98442df 212 US"*", /* hosts_try_prdr */
fd98a5c6 213#endif
f2de3a33 214#ifndef DISABLE_OCSP
0e66b3b6 215 US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */
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216 NULL, /* hosts_require_ocsp */
217#endif
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218 NULL, /* hosts_require_tls */
219 NULL, /* hosts_avoid_tls */
6c9ed72e 220 NULL, /* hosts_verify_avoid_tls */
c51b8e75 221 NULL, /* hosts_avoid_pipelining */
0756eb3c 222 NULL, /* hosts_avoid_esmtp */
57cc2785 223#ifdef SUPPORT_TLS
0756eb3c 224 NULL, /* hosts_nopass_tls */
875512a3 225 US"*", /* hosts_noproxy_tls */
57cc2785 226#endif
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227 5*60, /* command_timeout */
228 5*60, /* connect_timeout; shorter system default overrides */
229 5*60, /* data timeout */
230 10*60, /* final timeout */
231 1024, /* size_addition */
232 5, /* hosts_max_try */
8e669ac1 233 50, /* hosts_max_try_hardlimit */
48c7f9e2 234 TRUE, /* address_retry_include_sender */
0756eb3c 235 FALSE, /* allow_localhost */
382afc6b 236 FALSE, /* authenticated_sender_force */
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237 FALSE, /* gethostbyname */
238 TRUE, /* dns_qualify_single */
239 FALSE, /* dns_search_parents */
0539a19d 240 { NULL, NULL }, /* dnssec_domains {request,require} */
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241 TRUE, /* delay_after_cutoff */
242 FALSE, /* hosts_override */
243 FALSE, /* hosts_randomize */
244 TRUE, /* keepalive */
f1513293 245 FALSE, /* lmtp_ignore_quota */
9c695f6d 246 NULL, /* expand_retry_include_ip_address */
0756eb3c 247 TRUE /* retry_include_ip_address */
f0989ec0 248#ifdef SUPPORT_SOCKS
7eb6c37c 249 ,NULL /* socks_proxy */
b8bf753b 250#endif
80a47a2c 251#ifdef SUPPORT_TLS
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252 ,NULL, /* tls_certificate */
253 NULL, /* tls_crl */
254 NULL, /* tls_privatekey */
255 NULL, /* tls_require_ciphers */
54c90be1 256 NULL, /* tls_sni */
0e0f3f56 257 US"system", /* tls_verify_certificates */
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258 EXIM_CLIENT_DH_DEFAULT_MIN_BITS,
259 /* tls_dh_min_bits */
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260 TRUE, /* tls_tempfail_tryclear */
261 NULL, /* tls_verify_hosts */
610ff438 262 US"*", /* tls_try_verify_hosts */
01a4a5c5 263 US"*" /* tls_verify_cert_hostnames */
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264#endif
265#ifndef DISABLE_DKIM
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266 , {NULL, /* dkim_canon */
267 NULL, /* dkim_domain */
268 NULL, /* dkim_private_key */
269 NULL, /* dkim_selector */
270 NULL, /* dkim_sign_headers */
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271 NULL, /* dkim_strict */
272 FALSE} /* dot_stuffed */
80a47a2c 273#endif
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274};
275
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276/* some DSN flags for use later */
277
278static int rf_list[] = {rf_notify_never, rf_notify_success,
279 rf_notify_failure, rf_notify_delay };
280
45500060 281static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" };
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282
283
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284
285/* Local statics */
286
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287static uschar *smtp_command; /* Points to last cmd for error messages */
288static uschar *mail_command; /* Points to MAIL cmd for error messages */
289static uschar *data_command = US""; /* Points to DATA cmd for error messages */
290static BOOL update_waiting; /* TRUE to update the "wait" database */
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291
292/*XXX move to smtp_context */
87cb4a16 293static BOOL pipelining_active; /* current transaction is in pipe mode */
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294
295
296/*************************************************
297* Setup entry point *
298*************************************************/
299
300/* This function is called when the transport is about to be used,
301but before running it in a sub-process. It is used for two things:
302
303 (1) To set the fallback host list in addresses, when delivering.
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304 (2) To pass back the interface, port, protocol, and other options, for use
305 during callout verification.
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306
307Arguments:
308 tblock pointer to the transport instance block
309 addrlist list of addresses about to be transported
310 tf if not NULL, pointer to block in which to return options
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311 uid the uid that will be set (not used)
312 gid the gid that will be set (not used)
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313 errmsg place for error message (not used)
314
315Returns: OK always (FAIL, DEFER not used)
316*/
317
318static int
319smtp_transport_setup(transport_instance *tblock, address_item *addrlist,
929ba01c 320 transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg)
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321{
322smtp_transport_options_block *ob =
323 (smtp_transport_options_block *)(tblock->options_block);
324
325errmsg = errmsg; /* Keep picky compilers happy */
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326uid = uid;
327gid = gid;
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328
329/* Pass back options if required. This interface is getting very messy. */
330
02b41d71 331if (tf)
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332 {
333 tf->interface = ob->interface;
334 tf->port = ob->port;
335 tf->protocol = ob->protocol;
336 tf->hosts = ob->hosts;
337 tf->hosts_override = ob->hosts_override;
338 tf->hosts_randomize = ob->hosts_randomize;
339 tf->gethostbyname = ob->gethostbyname;
340 tf->qualify_single = ob->dns_qualify_single;
341 tf->search_parents = ob->dns_search_parents;
26da7e20 342 tf->helo_data = ob->helo_data;
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343 }
344
345/* Set the fallback host list for all the addresses that don't have fallback
346host lists, provided that the local host wasn't present in the original host
347list. */
348
349if (!testflag(addrlist, af_local_host_removed))
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350 for (; addrlist; addrlist = addrlist->next)
351 if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist;
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352
353return OK;
354}
355
356
357
358/*************************************************
359* Initialization entry point *
360*************************************************/
361
362/* Called for each instance, after its options have been read, to
363enable consistency checks to be done, or anything else that needs
364to be set up.
365
366Argument: pointer to the transport instance block
367Returns: nothing
368*/
369
370void
371smtp_transport_init(transport_instance *tblock)
372{
373smtp_transport_options_block *ob =
374 (smtp_transport_options_block *)(tblock->options_block);
375
376/* Retry_use_local_part defaults FALSE if unset */
377
378if (tblock->retry_use_local_part == TRUE_UNSET)
379 tblock->retry_use_local_part = FALSE;
380
381/* Set the default port according to the protocol */
382
383if (ob->port == NULL)
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384 ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" :
385 (strcmpic(ob->protocol, US"smtps") == 0)? US"smtps" : US"smtp";
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386
387/* Set up the setup entry point, to be called before subprocesses for this
388transport. */
389
390tblock->setup = smtp_transport_setup;
391
392/* Complain if any of the timeouts are zero. */
393
394if (ob->command_timeout <= 0 || ob->data_timeout <= 0 ||
395 ob->final_timeout <= 0)
396 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
397 "command, data, or final timeout value is zero for %s transport",
398 tblock->name);
399
400/* If hosts_override is set and there are local hosts, set the global
401flag that stops verify from showing router hosts. */
402
403if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE;
404
405/* If there are any fallback hosts listed, build a chain of host items
406for them, but do not do any lookups at this time. */
407
408host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE);
409}
410
411
412
413
414
415/*************************************************
416* Set delivery info into all active addresses *
417*************************************************/
418
419/* Only addresses whose status is >= PENDING are relevant. A lesser
420status means that an address is not currently being processed.
421
422Arguments:
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423 addrlist points to a chain of addresses
424 errno_value to put in each address's errno field
425 msg to put in each address's message field
426 rc to put in each address's transport_return field
427 pass_message if TRUE, set the "pass message" flag in the address
c562fd30 428 host if set, mark addrs as having used this host
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429 smtp_greeting from peer
430 helo_response from peer
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431
432If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in
433the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate
434this particular type of timeout.
435
436Returns: nothing
437*/
438
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439static void
440set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc,
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441 BOOL pass_message, host_item * host
442#ifdef EXPERIMENTAL_DSN_INFO
443 , const uschar * smtp_greeting, const uschar * helo_response
444#endif
445 )
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446{
447address_item *addr;
448int orvalue = 0;
449if (errno_value == ERRNO_CONNECTTIMEOUT)
450 {
451 errno_value = ETIMEDOUT;
452 orvalue = RTEF_CTOUT;
453 }
895fbaf2 454for (addr = addrlist; addr; addr = addr->next)
168dec3b 455 if (addr->transport_return >= PENDING)
447d236c 456 {
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457 addr->basic_errno = errno_value;
458 addr->more_errno |= orvalue;
02b41d71 459 if (msg)
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460 {
461 addr->message = msg;
462 if (pass_message) setflag(addr, af_pass_message);
463 }
464 addr->transport_return = rc;
465 if (host)
895fbaf2 466 {
168dec3b 467 addr->host_used = host;
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468#ifdef EXPERIMENTAL_DSN_INFO
469 if (smtp_greeting)
470 {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';}
471 addr->smtp_greeting = smtp_greeting;
472
473 if (helo_response)
474 {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';}
475 addr->helo_response = helo_response;
476#endif
477 }
447d236c 478 }
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479}
480
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481static void
482set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc,
483 BOOL pass_message)
484{
485set_errno(addrlist, errno_value, msg, rc, pass_message, NULL
486#ifdef EXPERIMENTAL_DSN_INFO
487 , NULL, NULL
488#endif
489 );
490}
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491
492
493/*************************************************
494* Check an SMTP response *
495*************************************************/
496
497/* This function is given an errno code and the SMTP response buffer
498to analyse, together with the host identification for generating messages. It
499sets an appropriate message and puts the first digit of the response code into
500the yield variable. If no response was actually read, a suitable digit is
501chosen.
502
503Arguments:
447d236c
PH
504 host the current host, to get its name for messages
505 errno_value pointer to the errno value
506 more_errno from the top address for use with ERRNO_FILTER_FAIL
507 buffer the SMTP response buffer
508 yield where to put a one-digit SMTP response code
4c04137d 509 message where to put an error message
447d236c
PH
510 pass_message set TRUE if message is an SMTP response
511
512Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE
0756eb3c
PH
513*/
514
a7538db1
JH
515static BOOL
516check_response(host_item *host, int *errno_value, int more_errno,
447d236c 517 uschar *buffer, int *yield, uschar **message, BOOL *pass_message)
0756eb3c 518{
0d9fa8c0 519uschar * pl = pipelining_active ? US"pipelined " : US"";
e9166683 520const uschar * s;
0756eb3c
PH
521
522*yield = '4'; /* Default setting is to give a temporary error */
523
e9166683 524switch(*errno_value)
0756eb3c 525 {
e9166683
JH
526 case ETIMEDOUT: /* Handle response timeout */
527 *message = US string_sprintf("SMTP timeout after %s%s",
528 pl, smtp_command);
529 if (transport_count > 0)
530 *message = US string_sprintf("%s (%d bytes written)", *message,
531 transport_count);
532 return FALSE;
533
534 case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */
535 s = string_printing(buffer);
536 while (isspace(*s)) s++;
537 *message = *s == 0
538 ? string_sprintf("Malformed SMTP reply (an empty line) "
539 "in response to %s%s", pl, smtp_command)
540 : string_sprintf("Malformed SMTP reply in response to %s%s: %s",
541 pl, smtp_command, s);
542 return FALSE;
543
544 case ERRNO_FILTER_FAIL: /* Handle a failed filter process error;
545 can't send QUIT as we mustn't end the DATA. */
546 *message = string_sprintf("transport filter process failed (%d)%s",
547 more_errno,
548 more_errno == EX_EXECFAILED ? ": unable to execute command" : "");
549 return FALSE;
550
551 case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion;
552 can't send QUIT as we mustn't end the DATA. */
553 *message =
554 string_sprintf("failed to expand headers_add or headers_remove: %s",
555 expand_string_message);
556 return FALSE;
557
558 case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */
559 *message = string_sprintf("failed to write a data block");
560 return FALSE;
0756eb3c 561
8c5d388a 562#ifdef SUPPORT_I18N
e9166683
JH
563 case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */
564 *message = US"utf8 support required but not offered for forwarding";
565 DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message);
566 return TRUE;
250b6871 567#endif
e9166683 568 }
250b6871 569
0756eb3c
PH
570/* Handle error responses from the remote mailer. */
571
572if (buffer[0] != 0)
573 {
e9166683
JH
574 *message = string_sprintf("SMTP error from remote mail server after %s%s: "
575 "%s", pl, smtp_command, s = string_printing(buffer));
447d236c 576 *pass_message = TRUE;
0756eb3c
PH
577 *yield = buffer[0];
578 return TRUE;
579 }
580
581/* No data was read. If there is no errno, this must be the EOF (i.e.
19b9dc85
PH
582connection closed) case, which causes deferral. An explicit connection reset
583error has the same effect. Otherwise, put the host's identity in the message,
584leaving the errno value to be interpreted as well. In all cases, we have to
585assume the connection is now dead. */
0756eb3c 586
19b9dc85 587if (*errno_value == 0 || *errno_value == ECONNRESET)
0756eb3c
PH
588 {
589 *errno_value = ERRNO_SMTPCLOSED;
c562fd30 590 *message = US string_sprintf("Remote host closed connection "
02b41d71 591 "in response to %s%s", pl, smtp_command);
0756eb3c 592 }
de6273b4
JH
593else
594 *message = US string_sprintf("%s [%s]", host->name, host->address);
0756eb3c
PH
595
596return FALSE;
597}
598
599
600
601/*************************************************
602* Write error message to logs *
603*************************************************/
604
605/* This writes to the main log and to the message log.
606
607Arguments:
608 addr the address item containing error information
609 host the current host
610
611Returns: nothing
612*/
613
614static void
615write_logs(address_item *addr, host_item *host)
616{
584ddd64
JH
617uschar * message = LOGGING(outgoing_port)
618 ? string_sprintf("H=%s [%s]:%d", host->name, host->address,
619 host->port == PORT_NONE ? 25 : host->port)
620 : string_sprintf("H=%s [%s]", host->name, host->address);
c562fd30
JH
621
622if (addr->message)
0756eb3c 623 {
c562fd30 624 message = string_sprintf("%s: %s", message, addr->message);
0756eb3c
PH
625 if (addr->basic_errno > 0)
626 message = string_sprintf("%s: %s", message, strerror(addr->basic_errno));
627 log_write(0, LOG_MAIN, "%s", message);
628 deliver_msglog("%s %s\n", tod_stamp(tod_log), message);
629 }
630else
631 {
37f3dc43
JH
632 const uschar * s = exim_errstr(addr->basic_errno);
633 log_write(0, LOG_MAIN, "%s %s", message, s);
634 deliver_msglog("%s %s %s\n", tod_stamp(tod_log), message, s);
0756eb3c
PH
635 }
636}
637
c562fd30
JH
638static void
639msglog_line(host_item * host, uschar * message)
640{
37f3dc43
JH
641deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log),
642 host->name, host->address, message);
c562fd30
JH
643}
644
0756eb3c
PH
645
646
0cbf2b82 647#ifndef DISABLE_EVENT
d68218c7
JH
648/*************************************************
649* Post-defer action *
650*************************************************/
651
652/* This expands an arbitrary per-transport string.
653 It might, for example, be used to write to the database log.
654
655Arguments:
d68218c7
JH
656 addr the address item containing error information
657 host the current host
658
659Returns: nothing
660*/
661
662static void
774ef2d7 663deferred_event_raise(address_item *addr, host_item *host)
d68218c7 664{
774ef2d7 665uschar * action = addr->transport->event_action;
55414b25 666const uschar * save_domain;
a7538db1
JH
667uschar * save_local;
668
d68218c7 669if (!action)
a7538db1 670 return;
d68218c7 671
a7538db1
JH
672save_domain = deliver_domain;
673save_local = deliver_localpart;
674
675/*XXX would ip & port already be set up? */
676deliver_host_address = string_copy(host->address);
774ef2d7
JH
677deliver_host_port = host->port == PORT_NONE ? 25 : host->port;
678event_defer_errno = addr->basic_errno;
d68218c7
JH
679
680router_name = addr->router->name;
681transport_name = addr->transport->name;
a7538db1
JH
682deliver_domain = addr->domain;
683deliver_localpart = addr->local_part;
684
774ef2d7 685(void) event_raise(action, US"msg:host:defer",
a7538db1
JH
686 addr->message
687 ? addr->basic_errno > 0
688 ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno))
689 : string_copy(addr->message)
690 : addr->basic_errno > 0
691 ? string_copy(US strerror(addr->basic_errno))
692 : NULL);
693
694deliver_localpart = save_local;
695deliver_domain = save_domain;
d68218c7
JH
696router_name = transport_name = NULL;
697}
698#endif
699
0756eb3c
PH
700/*************************************************
701* Synchronize SMTP responses *
702*************************************************/
703
704/* This function is called from smtp_deliver() to receive SMTP responses from
705the server, and match them up with the commands to which they relate. When
706PIPELINING is not in use, this function is called after every command, and is
707therefore somewhat over-engineered, but it is simpler to use a single scheme
708that works both with and without PIPELINING instead of having two separate sets
709of code.
710
711The set of commands that are buffered up with pipelining may start with MAIL
712and may end with DATA; in between are RCPT commands that correspond to the
713addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH,
714etc.) are never buffered.
715
716Errors after MAIL or DATA abort the whole process leaving the response in the
717buffer. After MAIL, pending responses are flushed, and the original command is
718re-instated in big_buffer for error messages. For RCPT commands, the remote is
719permitted to reject some recipient addresses while accepting others. However
720certain errors clearly abort the whole process. Set the value in
721transport_return to PENDING_OK if the address is accepted. If there is a
722subsequent general error, it will get reset accordingly. If not, it will get
723converted to OK at the end.
724
725Arguments:
df5b41e3 726 sx smtp connection context
48c7f9e2 727 count the number of responses to read
48c7f9e2
PH
728 pending_DATA 0 if last command sent was not DATA
729 +1 if previously had a good recipient
730 -1 if not previously had a good recipient
0756eb3c
PH
731
732Returns: 3 if at least one address had 2xx and one had 5xx
733 2 if at least one address had 5xx but none had 2xx
734 1 if at least one host had a 2xx response, but none had 5xx
735 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA)
736 -1 timeout while reading RCPT response
737 -2 I/O or other non-response error for RCPT
738 -3 DATA or MAIL failed - errno and buffer set
739*/
740
741static int
df5b41e3 742sync_responses(smtp_context * sx, int count, int pending_DATA)
0756eb3c 743{
df5b41e3 744address_item *addr = sx->sync_addr;
e9166683
JH
745smtp_transport_options_block *ob =
746 (smtp_transport_options_block *)sx->tblock->options_block;
0756eb3c
PH
747int yield = 0;
748
749/* Handle the response for a MAIL command. On error, reinstate the original
750command in big_buffer for error message use, and flush any further pending
751responses before returning, except after I/O errors and timeouts. */
752
df5b41e3 753if (sx->pending_MAIL)
0756eb3c
PH
754 {
755 count--;
e9166683
JH
756 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
757 '2', ob->command_timeout))
0756eb3c 758 {
e027f545 759 DEBUG(D_transport) debug_printf("bad response for MAIL\n");
0756eb3c 760 Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */
df5b41e3 761 if (errno == 0 && sx->buffer[0] != 0)
0756eb3c
PH
762 {
763 uschar flushbuffer[4096];
e97957bc 764 int save_errno = 0;
df5b41e3 765 if (sx->buffer[0] == '4')
e97957bc
PH
766 {
767 save_errno = ERRNO_MAIL4XX;
df5b41e3 768 addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
e97957bc 769 }
0756eb3c
PH
770 while (count-- > 0)
771 {
df5b41e3 772 if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer),
e9166683 773 '2', ob->command_timeout)
0756eb3c
PH
774 && (errno != 0 || flushbuffer[0] == 0))
775 break;
776 }
e97957bc 777 errno = save_errno;
0756eb3c 778 }
c562fd30
JH
779
780 if (pending_DATA) count--; /* Number of RCPT responses to come */
781 while (count-- > 0) /* Mark any pending addrs with the host used */
782 {
783 while (addr->transport_return != PENDING_DEFER) addr = addr->next;
df5b41e3 784 addr->host_used = sx->host;
c562fd30
JH
785 addr = addr->next;
786 }
0756eb3c
PH
787 return -3;
788 }
789 }
790
791if (pending_DATA) count--; /* Number of RCPT responses to come */
792
793/* Read and handle the required number of RCPT responses, matching each one up
794with an address by scanning for the next address whose status is PENDING_DEFER.
795*/
796
797while (count-- > 0)
798 {
4c2471ca
JH
799 while (addr->transport_return != PENDING_DEFER)
800 if (!(addr = addr->next))
801 return -2;
0756eb3c
PH
802
803 /* The address was accepted */
df5b41e3 804 addr->host_used = sx->host;
0756eb3c 805
e9166683
JH
806 if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
807 '2', ob->command_timeout))
0756eb3c
PH
808 {
809 yield |= 1;
810 addr->transport_return = PENDING_OK;
811
812 /* If af_dr_retry_exists is set, there was a routing delay on this address;
09945f1e
PH
813 ensure that any address-specific retry record is expunged. We do this both
814 for the basic key and for the version that also includes the sender. */
0756eb3c
PH
815
816 if (testflag(addr, af_dr_retry_exists))
09945f1e
PH
817 {
818 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
819 sender_address);
820 retry_add_item(addr, altkey, rf_delete);
0756eb3c 821 retry_add_item(addr, addr->address_retry_key, rf_delete);
09945f1e 822 }
0756eb3c
PH
823 }
824
825 /* Timeout while reading the response */
826
827 else if (errno == ETIMEDOUT)
828 {
c562fd30 829 uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>",
e9166683 830 transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes));
df5b41e3 831 set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE);
0756eb3c 832 retry_add_item(addr, addr->address_retry_key, 0);
f6c332bd 833 update_waiting = FALSE;
0756eb3c
PH
834 return -1;
835 }
836
837 /* Handle other errors in obtaining an SMTP response by returning -1. This
838 will cause all the addresses to be deferred. Restore the SMTP command in
839 big_buffer for which we are checking the response, so the error message
840 makes sense. */
841
df5b41e3 842 else if (errno != 0 || sx->buffer[0] == 0)
0756eb3c
PH
843 {
844 string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>",
df5b41e3 845 transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes));
0756eb3c
PH
846 return -2;
847 }
848
849 /* Handle SMTP permanent and temporary response codes. */
850
851 else
852 {
853 addr->message =
447d236c 854 string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: "
df5b41e3
JH
855 "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes),
856 string_printing(sx->buffer));
447d236c 857 setflag(addr, af_pass_message);
e9166683
JH
858 if (!sx->verify)
859 msglog_line(sx->host, addr->message);
0756eb3c
PH
860
861 /* The response was 5xx */
862
df5b41e3 863 if (sx->buffer[0] == '5')
0756eb3c
PH
864 {
865 addr->transport_return = FAIL;
866 yield |= 2;
867 }
868
869 /* The response was 4xx */
870
871 else
872 {
0756eb3c
PH
873 addr->transport_return = DEFER;
874 addr->basic_errno = ERRNO_RCPT4XX;
df5b41e3 875 addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
0756eb3c 876
e9166683
JH
877 if (!sx->verify)
878 {
0cbf2b82 879#ifndef DISABLE_EVENT
e9166683
JH
880 event_defer_errno = addr->more_errno;
881 msg_event_raise(US"msg:rcpt:host:defer", addr);
5ef5dd52
JB
882#endif
883
e9166683
JH
884 /* Log temporary errors if there are more hosts to be tried.
885 If not, log this last one in the == line. */
0756eb3c 886
e9166683
JH
887 if (sx->host->next)
888 log_write(0, LOG_MAIN, "H=%s [%s]: %s",
889 sx->host->name, sx->host->address, addr->message);
0756eb3c 890
0cbf2b82 891#ifndef DISABLE_EVENT
e9166683
JH
892 else
893 msg_event_raise(US"msg:rcpt:defer", addr);
5ef5dd52
JB
894#endif
895
e9166683
JH
896 /* Do not put this message on the list of those waiting for specific
897 hosts, as otherwise it is likely to be tried too often. */
0756eb3c 898
e9166683 899 update_waiting = FALSE;
0756eb3c 900
e9166683
JH
901 /* Add a retry item for the address so that it doesn't get tried again
902 too soon. If address_retry_include_sender is true, add the sender address
903 to the retry key. */
0756eb3c 904
e9166683
JH
905 retry_add_item(addr,
906 ob->address_retry_include_sender
907 ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address)
908 : addr->address_retry_key,
909 0);
910 }
0756eb3c
PH
911 }
912 }
913 } /* Loop for next RCPT response */
914
915/* Update where to start at for the next block of responses, unless we
916have already handled all the addresses. */
917
e9166683 918if (addr) sx->sync_addr = addr->next;
0756eb3c
PH
919
920/* Handle a response to DATA. If we have not had any good recipients, either
921previously or in this block, the response is ignored. */
922
923if (pending_DATA != 0 &&
e9166683
JH
924 !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
925 '3', ob->command_timeout))
0756eb3c
PH
926 {
927 int code;
928 uschar *msg;
447d236c 929 BOOL pass_message;
e97957bc
PH
930 if (pending_DATA > 0 || (yield & 1) != 0)
931 {
df5b41e3 932 if (errno == 0 && sx->buffer[0] == '4')
e97957bc
PH
933 {
934 errno = ERRNO_DATA4XX;
df5b41e3 935 sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
e97957bc
PH
936 }
937 return -3;
938 }
df5b41e3 939 (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message);
0756eb3c
PH
940 DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining "
941 "is in use and there were no good recipients\n", msg);
942 }
943
944/* All responses read and handled; MAIL (if present) received 2xx and DATA (if
945present) received 3xx. If any RCPTs were handled and yielded anything other
946than 4xx, yield will be set non-zero. */
947
948return yield;
949}
950
951
952
fcc8e047
JH
953/* Do the client side of smtp-level authentication */
954/*
955Arguments:
956 buffer EHLO response from server (gets overwritten)
957 addrlist chain of potential addresses to deliver
958 host host to deliver to
959 ob transport options
960 ibp, obp comms channel control blocks
961
962Returns:
963 OK Success, or failed (but not required): global "smtp_authenticated" set
964 DEFER Failed authentication (and was required)
965 ERROR Internal problem
966
967 FAIL_SEND Failed communications - transmit
968 FAIL - response
969*/
970
971int
972smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host,
973 smtp_transport_options_block *ob, BOOL is_esmtp,
974 smtp_inblock *ibp, smtp_outblock *obp)
975{
a7538db1
JH
976int require_auth;
977uschar *fail_reason = US"server did not advertise AUTH support";
fcc8e047 978
a7538db1
JH
979smtp_authenticated = FALSE;
980client_authenticator = client_authenticated_id = client_authenticated_sender = NULL;
5130845b 981require_auth = verify_check_given_host(&ob->hosts_require_auth, host);
fcc8e047 982
a7538db1
JH
983if (is_esmtp && !regex_AUTH) regex_AUTH =
984 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
985 FALSE, TRUE);
fcc8e047 986
a7538db1
JH
987if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1))
988 {
989 uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]);
990 expand_nmax = -1; /* reset */
fcc8e047 991
a7538db1
JH
992 /* Must not do this check until after we have saved the result of the
993 regex match above. */
fcc8e047 994
a7538db1 995 if (require_auth == OK ||
5130845b 996 verify_check_given_host(&ob->hosts_try_auth, host) == OK)
a7538db1
JH
997 {
998 auth_instance *au;
999 fail_reason = US"no common mechanisms were found";
fcc8e047 1000
a7538db1 1001 DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n");
fcc8e047 1002
a7538db1
JH
1003 /* Scan the configured authenticators looking for one which is configured
1004 for use as a client, which is not suppressed by client_condition, and
1005 whose name matches an authentication mechanism supported by the server.
1006 If one is found, attempt to authenticate by calling its client function.
1007 */
fcc8e047 1008
a7538db1
JH
1009 for (au = auths; !smtp_authenticated && au != NULL; au = au->next)
1010 {
1011 uschar *p = names;
1012 if (!au->client ||
1013 (au->client_condition != NULL &&
1014 !expand_check_condition(au->client_condition, au->name,
1015 US"client authenticator")))
1016 {
1017 DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n",
1018 au->name,
1019 (au->client)? "client_condition is false" :
1020 "not configured as a client");
1021 continue;
1022 }
fcc8e047 1023
a7538db1 1024 /* Loop to scan supported server mechanisms */
fcc8e047 1025
a7538db1
JH
1026 while (*p != 0)
1027 {
1028 int rc;
1029 int len = Ustrlen(au->public_name);
1030 while (isspace(*p)) p++;
fcc8e047 1031
a7538db1
JH
1032 if (strncmpic(au->public_name, p, len) != 0 ||
1033 (p[len] != 0 && !isspace(p[len])))
1034 {
1035 while (*p != 0 && !isspace(*p)) p++;
1036 continue;
1037 }
fcc8e047 1038
a7538db1
JH
1039 /* Found data for a listed mechanism. Call its client entry. Set
1040 a flag in the outblock so that data is overwritten after sending so
1041 that reflections don't show it. */
fcc8e047 1042
a7538db1
JH
1043 fail_reason = US"authentication attempt(s) failed";
1044 obp->authenticating = TRUE;
1045 rc = (au->info->clientcode)(au, ibp, obp,
1046 ob->command_timeout, buffer, bufsize);
1047 obp->authenticating = FALSE;
1048 DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n",
1049 au->name, rc);
fcc8e047 1050
a7538db1
JH
1051 /* A temporary authentication failure must hold up delivery to
1052 this host. After a permanent authentication failure, we carry on
1053 to try other authentication methods. If all fail hard, try to
1054 deliver the message unauthenticated unless require_auth was set. */
fcc8e047 1055
a7538db1
JH
1056 switch(rc)
1057 {
1058 case OK:
1059 smtp_authenticated = TRUE; /* stops the outer loop */
1060 client_authenticator = au->name;
1061 if (au->set_client_id != NULL)
1062 client_authenticated_id = expand_string(au->set_client_id);
1063 break;
1064
1065 /* Failure after writing a command */
1066
1067 case FAIL_SEND:
1068 return FAIL_SEND;
1069
1070 /* Failure after reading a response */
1071
1072 case FAIL:
1073 if (errno != 0 || buffer[0] != '5') return FAIL;
1074 log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s",
1075 au->name, host->name, host->address, buffer);
1076 break;
1077
1078 /* Failure by some other means. In effect, the authenticator
1079 decided it wasn't prepared to handle this case. Typically this
1080 is the result of "fail" in an expansion string. Do we need to
1081 log anything here? Feb 2006: a message is now put in the buffer
1082 if logging is required. */
1083
1084 case CANCELLED:
1085 if (*buffer != 0)
1086 log_write(0, LOG_MAIN, "%s authenticator cancelled "
1087 "authentication H=%s [%s] %s", au->name, host->name,
1088 host->address, buffer);
1089 break;
1090
1091 /* Internal problem, message in buffer. */
1092
1093 case ERROR:
895fbaf2
JH
1094 set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer),
1095 DEFER, FALSE);
a7538db1
JH
1096 return ERROR;
1097 }
fcc8e047 1098
a7538db1
JH
1099 break; /* If not authenticated, try next authenticator */
1100 } /* Loop for scanning supported server mechanisms */
1101 } /* Loop for further authenticators */
fcc8e047 1102 }
a7538db1 1103 }
fcc8e047 1104
a7538db1 1105/* If we haven't authenticated, but are required to, give up. */
fcc8e047 1106
a7538db1
JH
1107if (require_auth == OK && !smtp_authenticated)
1108 {
895fbaf2 1109 set_errno_nohost(addrlist, ERRNO_AUTHFAIL,
a7538db1 1110 string_sprintf("authentication required but %s", fail_reason), DEFER,
895fbaf2 1111 FALSE);
a7538db1
JH
1112 return DEFER;
1113 }
4d8d62b9 1114
a7538db1 1115return OK;
fcc8e047
JH
1116}
1117
1118
1119/* Construct AUTH appendix string for MAIL TO */
1120/*
1121Arguments
1122 buffer to build string
1123 addrlist chain of potential addresses to deliver
1124 ob transport options
1125
1126Globals smtp_authenticated
1127 client_authenticated_sender
1128Return True on error, otherwise buffer has (possibly empty) terminated string
1129*/
1130
1131BOOL
1132smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist,
1133 smtp_transport_options_block *ob)
1134{
1135uschar *local_authenticated_sender = authenticated_sender;
1136
1137#ifdef notdef
1138 debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N");
1139#endif
1140
1141if (ob->authenticated_sender != NULL)
1142 {
1143 uschar *new = expand_string(ob->authenticated_sender);
1144 if (new == NULL)
1145 {
1146 if (!expand_string_forcedfail)
1147 {
1148 uschar *message = string_sprintf("failed to expand "
1149 "authenticated_sender: %s", expand_string_message);
895fbaf2 1150 set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
fcc8e047
JH
1151 return TRUE;
1152 }
1153 }
1154 else if (new[0] != 0) local_authenticated_sender = new;
1155 }
1156
1157/* Add the authenticated sender address if present */
1158
1159if ((smtp_authenticated || ob->authenticated_sender_force) &&
1160 local_authenticated_sender != NULL)
1161 {
1162 string_format(buffer, bufsize, " AUTH=%s",
1163 auth_xtextencode(local_authenticated_sender,
1164 Ustrlen(local_authenticated_sender)));
1165 client_authenticated_sender = string_copy(local_authenticated_sender);
1166 }
1167else
1168 *buffer= 0;
1169
1170return FALSE;
1171}
1172
1173
1174
0e66b3b6 1175#ifdef EXPERIMENTAL_DANE
2d5fdd53
JH
1176/* Lookup TLSA record for host/port.
1177Return: OK success with dnssec; DANE mode
1178 DEFER Do not use this host now, may retry later
1179 FAIL_FORCED No TLSA record; DANE not usable
1180 FAIL Do not use this connection
1181*/
1182
0e66b3b6 1183int
4b0fe319 1184tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required)
0e66b3b6
JH
1185{
1186/* move this out to host.c given the similarity to dns_lookup() ? */
1187uschar buffer[300];
55414b25 1188const uschar * fullname = buffer;
58c30e47
JH
1189int rc;
1190BOOL sec;
0e66b3b6
JH
1191
1192/* TLSA lookup string */
1193(void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name);
1194
58c30e47
JH
1195rc = dns_lookup(dnsa, buffer, T_TLSA, &fullname);
1196sec = dns_is_secure(dnsa);
1197DEBUG(D_transport)
1198 debug_printf("TLSA lookup ret %d %sDNSSEC\n", rc, sec ? "" : "not ");
1199
1200switch (rc)
0e66b3b6 1201 {
0e66b3b6 1202 case DNS_SUCCEED:
58c30e47 1203 if (sec) return OK;
2d5fdd53 1204
58c30e47
JH
1205 log_write(0, LOG_MAIN, "DANE error: TLSA lookup not DNSSEC");
1206 /*FALLTHROUGH*/
2d5fdd53
JH
1207 case DNS_AGAIN:
1208 return DEFER; /* just defer this TLS'd conn */
1209
ef3a1a30
JH
1210 case DNS_NODATA: /* no TLSA RR for this lookup */
1211 case DNS_NOMATCH: /* no records at all for this lookup */
6b524204 1212 return dane_required ? FAIL : FAIL_FORCED;
2d5fdd53
JH
1213
1214 default:
1215 case DNS_FAIL:
1216 return dane_required ? FAIL : DEFER;
0e66b3b6 1217 }
0e66b3b6
JH
1218}
1219#endif
1220
1221
a39bd74d
JB
1222
1223typedef struct smtp_compare_s
1224{
1225 uschar *current_sender_address;
1226 struct transport_instance *tblock;
1227} smtp_compare_t;
1228
d093f8e5
JH
1229
1230/* Create a unique string that identifies this message, it is based on
1231sender_address, helo_data and tls_certificate if enabled.
1232*/
a39bd74d
JB
1233
1234static uschar *
1235smtp_local_identity(uschar * sender, struct transport_instance * tblock)
1236{
1237address_item * addr1;
1238uschar * if1 = US"";
1239uschar * helo1 = US"";
1240#ifdef SUPPORT_TLS
1241uschar * tlsc1 = US"";
1242#endif
1243uschar * save_sender_address = sender_address;
1244uschar * local_identity = NULL;
1245smtp_transport_options_block * ob =
1246 (smtp_transport_options_block *)tblock->options_block;
1247
1248sender_address = sender;
1249
1250addr1 = deliver_make_addr (sender, TRUE);
1251deliver_set_expansions(addr1);
1252
1253if (ob->interface)
1254 if1 = expand_string(ob->interface);
1255
1256if (ob->helo_data)
1257 helo1 = expand_string(ob->helo_data);
1258
1259#ifdef SUPPORT_TLS
1260if (ob->tls_certificate)
1261 tlsc1 = expand_string(ob->tls_certificate);
1262local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1);
1263#else
1264local_identity = string_sprintf ("%s^%s", if1, helo1);
1265#endif
1266
1267deliver_set_expansions(NULL);
1268sender_address = save_sender_address;
1269
1270return local_identity;
1271}
1272
1273
1274
1275/* This routine is a callback that is called from transport_check_waiting.
1276This function will evaluate the incoming message versus the previous
1277message. If the incoming message is using a different local identity then
1278we will veto this new message. */
1279
1280static BOOL
1281smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare)
1282{
dadff1d4
HSHR
1283uschar * message_local_identity,
1284 * current_local_identity,
1285 * new_sender_address;
1286
1287current_local_identity =
a39bd74d 1288 smtp_local_identity(s_compare->current_sender_address, s_compare->tblock);
a39bd74d 1289
dadff1d4
HSHR
1290if (!(new_sender_address = deliver_get_sender_address(message_id)))
1291 return 0;
1292
1293message_local_identity =
1294 smtp_local_identity(new_sender_address, s_compare->tblock);
a39bd74d
JB
1295
1296return Ustrcmp(current_local_identity, message_local_identity) == 0;
1297}
1298
1299
1300
e9166683
JH
1301static uschar
1302ehlo_response(uschar * buf, uschar checks)
9094b84b 1303{
e9166683
JH
1304size_t bsize = Ustrlen(buf);
1305
9094b84b 1306#ifdef SUPPORT_TLS
ff5aac2b
JH
1307if ( checks & PEER_OFFERED_TLS
1308 && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1309 checks &= ~PEER_OFFERED_TLS;
9094b84b
JH
1310#endif
1311
ff5aac2b
JH
1312if ( checks & PEER_OFFERED_IGNQ
1313 && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0,
1314 PCRE_EOPT, NULL, 0) < 0)
1315 checks &= ~PEER_OFFERED_IGNQ;
9094b84b 1316
f98442df
JH
1317if ( checks & PEER_OFFERED_CHUNKING
1318 && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1319 checks &= ~PEER_OFFERED_CHUNKING;
1320
9094b84b 1321#ifndef DISABLE_PRDR
ff5aac2b
JH
1322if ( checks & PEER_OFFERED_PRDR
1323 && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1324 checks &= ~PEER_OFFERED_PRDR;
9094b84b
JH
1325#endif
1326
1327#ifdef SUPPORT_I18N
ff5aac2b
JH
1328if ( checks & PEER_OFFERED_UTF8
1329 && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1330 checks &= ~PEER_OFFERED_UTF8;
9094b84b
JH
1331#endif
1332
ff5aac2b
JH
1333if ( checks & PEER_OFFERED_DSN
1334 && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1335 checks &= ~PEER_OFFERED_DSN;
9094b84b 1336
ff5aac2b
JH
1337if ( checks & PEER_OFFERED_PIPE
1338 && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0,
1339 PCRE_EOPT, NULL, 0) < 0)
1340 checks &= ~PEER_OFFERED_PIPE;
9094b84b 1341
ff5aac2b
JH
1342if ( checks & PEER_OFFERED_SIZE
1343 && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1344 checks &= ~PEER_OFFERED_SIZE;
9094b84b
JH
1345
1346return checks;
1347}
1348
1349
6d5c916c
JH
1350
1351/* Callback for emitting a BDAT data chunk header.
6d5c916c 1352
e027f545
JH
1353If given a nonzero size, first flush any buffered SMTP commands
1354then emit the command.
1355
d2aa036b
JH
1356Reap previous SMTP command responses if requested, and always reap
1357the response from a previous BDAT command.
1358
1359Args:
1360 tctx transport context
1361 chunk_size value for SMTP BDAT command
1362 flags
1363 tc_chunk_last add LAST option to SMTP BDAT command
1364 tc_reap_prev reap response to previous SMTP commands
6d5c916c
JH
1365
1366Returns: OK or ERROR
1367*/
1368
1369static int
d2aa036b
JH
1370smtp_chunk_cmd_callback(transport_ctx * tctx, unsigned chunk_size,
1371 unsigned flags)
6d5c916c
JH
1372{
1373smtp_transport_options_block * ob =
1374 (smtp_transport_options_block *)(tctx->tblock->options_block);
e9166683 1375smtp_context * sx = tctx->smtp_context;
e027f545
JH
1376int cmd_count = 0;
1377int prev_cmd_count;
6d5c916c 1378
4e910c01
JH
1379/* Write SMTP chunk header command. If not reaping responses, note that
1380there may be more writes (like, the chunk data) done soon. */
6d5c916c 1381
e027f545 1382if (chunk_size > 0)
87cb4a16 1383 {
4e910c01
JH
1384 if((cmd_count = smtp_write_command(&sx->outblock,
1385 flags & tc_reap_prev ? SCMD_FLUSH : SCMD_MORE,
1386 "BDAT %u%s\r\n", chunk_size, flags & tc_chunk_last ? " LAST" : "")
e027f545 1387 ) < 0) return ERROR;
87cb4a16
JH
1388 if (flags & tc_chunk_last)
1389 data_command = string_copy(big_buffer); /* Save for later error message */
1390 }
e027f545 1391
e9166683 1392prev_cmd_count = cmd_count += sx->cmd_count;
6d5c916c 1393
e027f545 1394/* Reap responses for any previous, but not one we just emitted */
6d5c916c 1395
e027f545
JH
1396if (chunk_size > 0)
1397 prev_cmd_count--;
e9166683 1398if (sx->pending_BDAT)
e027f545 1399 prev_cmd_count--;
6d5c916c 1400
e027f545 1401if (flags & tc_reap_prev && prev_cmd_count > 0)
6d5c916c 1402 {
58fc5fb2
JH
1403 DEBUG(D_transport) debug_printf("look for %d responses"
1404 " for previous pipelined cmds\n", prev_cmd_count);
6d5c916c 1405
e9166683 1406 switch(sync_responses(sx, prev_cmd_count, 0))
e027f545
JH
1407 {
1408 case 1: /* 2xx (only) => OK */
e9166683
JH
1409 case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */
1410 case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */
e027f545
JH
1411 case 0: break; /* No 2xx or 5xx, but no probs */
1412
1413 case -1: /* Timeout on RCPT */
1414 default: return ERROR; /* I/O error, or any MAIL/DATA error */
1415 }
1416 cmd_count = 1;
e9166683 1417 if (!sx->pending_BDAT)
e027f545 1418 pipelining_active = FALSE;
6d5c916c 1419 }
e027f545 1420
58fc5fb2 1421/* Reap response for an outstanding BDAT */
e027f545 1422
e9166683 1423if (sx->pending_BDAT)
e027f545 1424 {
58fc5fb2
JH
1425 DEBUG(D_transport) debug_printf("look for one response for BDAT\n");
1426
e9166683 1427 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
e027f545
JH
1428 ob->command_timeout))
1429 {
e9166683 1430 if (errno == 0 && sx->buffer[0] == '4')
e027f545
JH
1431 {
1432 errno = ERRNO_DATA4XX; /*XXX does this actually get used? */
36e55f49 1433 sx->addrlist->more_errno |=
e9166683 1434 ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
e027f545
JH
1435 }
1436 return ERROR;
1437 }
1438 cmd_count--;
e9166683 1439 sx->pending_BDAT = FALSE;
e027f545
JH
1440 pipelining_active = FALSE;
1441 }
1442else if (chunk_size > 0)
e9166683 1443 sx->pending_BDAT = TRUE;
e027f545
JH
1444
1445
e9166683 1446sx->cmd_count = cmd_count;
e027f545 1447return OK;
6d5c916c
JH
1448}
1449
1450
1451
0756eb3c 1452/*************************************************
d093f8e5 1453* Make connection for given message *
0756eb3c
PH
1454*************************************************/
1455
d093f8e5
JH
1456/*
1457Arguments:
1458 ctx connection context
d093f8e5
JH
1459 suppress_tls if TRUE, don't attempt a TLS connection - this is set for
1460 a second attempt after TLS initialization fails
d093f8e5
JH
1461
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
e9166683 1472smtp_setup_conn(smtp_context * sx, BOOL suppress_tls)
d093f8e5
JH
1473{
1474#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
1475dns_answer tlsa_dnsa;
1476#endif
1477BOOL pass_message = FALSE;
d093f8e5 1478uschar * message = NULL;
d093f8e5
JH
1479int yield = OK;
1480int rc;
1481
02b41d71 1482sx->ob = (smtp_transport_options_block *) sx->tblock->options_block;
d093f8e5
JH
1483
1484sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0;
1485sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0;
1486sx->ok = FALSE;
1487sx->send_rset = TRUE;
1488sx->send_quit = TRUE;
1489sx->setting_up = TRUE;
1490sx->esmtp = TRUE;
1491sx->esmtp_sent = FALSE;
59a286ef 1492#ifdef SUPPORT_I18N
d093f8e5 1493sx->utf8_needed = FALSE;
59a286ef 1494#endif
d093f8e5 1495sx->dsn_all_lasthop = TRUE;
59a286ef 1496#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
d093f8e5
JH
1497sx->dane = FALSE;
1498sx->dane_required = verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK;
1499#endif
1500
1501if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999;
d093f8e5
JH
1502sx->peer_offered = 0;
1503sx->igquotstr = US"";
02b41d71 1504if (!sx->helo_data) sx->helo_data = sx->ob->helo_data;
d093f8e5
JH
1505#ifdef EXPERIMENTAL_DSN_INFO
1506sx->smtp_greeting = NULL;
1507sx->helo_response = NULL;
59a286ef
JH
1508#endif
1509
0756eb3c 1510smtp_command = US"initial connection";
d093f8e5 1511sx->buffer[0] = '\0';
0756eb3c
PH
1512
1513/* Set up the buffer for reading SMTP response packets. */
1514
d093f8e5
JH
1515sx->inblock.buffer = sx->inbuffer;
1516sx->inblock.buffersize = sizeof(sx->inbuffer);
1517sx->inblock.ptr = sx->inbuffer;
1518sx->inblock.ptrend = sx->inbuffer;
0756eb3c
PH
1519
1520/* Set up the buffer for holding SMTP commands while pipelining */
1521
d093f8e5
JH
1522sx->outblock.buffer = sx->outbuffer;
1523sx->outblock.buffersize = sizeof(sx->outbuffer);
1524sx->outblock.ptr = sx->outbuffer;
1525sx->outblock.cmd_count = 0;
1526sx->outblock.authenticating = FALSE;
0756eb3c 1527
6c512171
PH
1528/* Reset the parameters of a TLS session. */
1529
817d9f57
JH
1530tls_out.bits = 0;
1531tls_out.cipher = NULL; /* the one we may use for this transport */
9d1c15ef
JH
1532tls_out.ourcert = NULL;
1533tls_out.peercert = NULL;
817d9f57
JH
1534tls_out.peerdn = NULL;
1535#if defined(SUPPORT_TLS) && !defined(USE_GNUTLS)
1536tls_out.sni = NULL;
5b456975 1537#endif
018058b2 1538tls_out.ocsp = OCSP_NOT_REQ;
6c512171 1539
35aba663
JH
1540/* Flip the legacy TLS-related variables over to the outbound set in case
1541they're used in the context of the transport. Don't bother resetting
02b41d71
JH
1542afterward (when being used by a transport) as we're in a subprocess.
1543For verify, unflipped once the callout is dealt with */
35aba663
JH
1544
1545tls_modify_variables(&tls_out);
1546
061b7ebd 1547#ifndef SUPPORT_TLS
d093f8e5 1548if (sx->smtps)
061b7ebd 1549 {
d093f8e5 1550 set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available",
895fbaf2 1551 DEFER, FALSE);
018058b2 1552 return ERROR;
061b7ebd
PP
1553 }
1554#endif
1555
0756eb3c
PH
1556/* Make a connection to the host if this isn't a continued delivery, and handle
1557the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled
1558specially so they can be identified for retries. */
1559
58c30e47 1560if (!continue_hostname)
0756eb3c 1561 {
e9166683 1562 if (sx->verify)
02b41d71
JH
1563 HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port);
1564
58c30e47 1565 /* Get the actual port the connection will use, into sx->host */
4311097e 1566
58c30e47 1567 smtp_port_for_connect(sx->host, sx->port);
0756eb3c 1568
0e66b3b6 1569#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
58c30e47 1570 /* Do TLSA lookup for DANE */
0e66b3b6 1571 {
0e66b3b6
JH
1572 tls_out.dane_verified = FALSE;
1573 tls_out.tlsa_usage = 0;
1574
d093f8e5 1575 if (sx->host->dnssec == DS_YES)
0e66b3b6 1576 {
d093f8e5
JH
1577 if( sx->dane_required
1578 || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK
0e66b3b6 1579 )
d093f8e5 1580 switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required))
4b0fe319 1581 {
58c30e47
JH
1582 case OK: sx->dane = TRUE;
1583 sx->ob->tls_tempfail_tryclear = FALSE;
1584 break;
2d5fdd53 1585 case FAIL_FORCED: break;
d093f8e5 1586 default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
2d5fdd53
JH
1587 string_sprintf("DANE error: tlsa lookup %s",
1588 rc == DEFER ? "DEFER" : "FAIL"),
1589 rc, FALSE);
1590 return rc;
4b0fe319 1591 }
0e66b3b6 1592 }
d093f8e5 1593 else if (sx->dane_required)
0e66b3b6 1594 {
d093f8e5
JH
1595 set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
1596 string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name),
895fbaf2 1597 FAIL, FALSE);
4b0fe319 1598 return FAIL;
0e66b3b6 1599 }
0e66b3b6
JH
1600 }
1601#endif /*DANE*/
1602
58c30e47
JH
1603 /* Make the TCP connection */
1604
1605 sx->inblock.sock = sx->outblock.sock =
1606 smtp_connect(sx->host, sx->host_af, sx->interface,
1607 sx->ob->connect_timeout, sx->tblock);
1608
1609 if (sx->inblock.sock < 0)
1610 {
1611 uschar * msg = NULL;
1612 if (sx->verify)
1613 {
1614 msg = US strerror(errno);
1615 HDEBUG(D_verify) debug_printf("connect: %s\n", msg);
1616 }
1617 set_errno_nohost(sx->addrlist,
1618 errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno,
1619 sx->verify ? string_sprintf("could not connect: %s", msg)
1620 : NULL,
1621 DEFER, FALSE);
1622 sx->send_quit = FALSE;
1623 return DEFER;
1624 }
1625
41c7c167
PH
1626 /* Expand the greeting message while waiting for the initial response. (Makes
1627 sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is
1628 delayed till here so that $sending_interface and $sending_port are set. */
1629
02b41d71
JH
1630 if (sx->helo_data)
1631 if (!(sx->helo_data = expand_string(sx->helo_data)))
e9166683 1632 if (sx->verify)
02b41d71
JH
1633 log_write(0, LOG_MAIN|LOG_PANIC,
1634 "<%s>: failed to expand transport's helo_data value for callout: %s",
1635 sx->addrlist->address, expand_string_message);
1636
8c5d388a 1637#ifdef SUPPORT_I18N
d093f8e5 1638 if (sx->helo_data)
810d16ad 1639 {
02b41d71
JH
1640 expand_string_message = NULL;
1641 if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data,
1642 &expand_string_message)),
1643 expand_string_message)
e9166683 1644 if (sx->verify)
02b41d71
JH
1645 log_write(0, LOG_MAIN|LOG_PANIC,
1646 "<%s>: failed to expand transport's helo_data value for callout: %s",
1647 sx->addrlist->address, expand_string_message);
1648 else
1649 sx->helo_data = NULL;
810d16ad
JH
1650 }
1651#endif
41c7c167 1652
0756eb3c
PH
1653 /* The first thing is to wait for an initial OK response. The dreaded "goto"
1654 is nevertheless a reasonably clean way of programming this kind of logic,
1655 where you want to escape on any error. */
1656
d093f8e5 1657 if (!sx->smtps)
061b7ebd 1658 {
8d330698
JH
1659 BOOL good_response;
1660
1661#ifdef TCP_QUICKACK
d093f8e5 1662 (void) setsockopt(sx->inblock.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off));
8d330698 1663#endif
d093f8e5
JH
1664 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
1665 '2', sx->ob->command_timeout);
895fbaf2 1666#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1667 sx->smtp_greeting = string_copy(sx->buffer);
895fbaf2
JH
1668#endif
1669 if (!good_response) goto RESPONSE_FAILED;
0756eb3c 1670
0cbf2b82 1671#ifndef DISABLE_EVENT
b30275b8 1672 {
805c9d53 1673 uschar * s;
d093f8e5
JH
1674 lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes"
1675 : sx->host->dnssec==DS_NO ? US"no" : NULL;
1676 s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer);
b30275b8 1677 if (s)
a7538db1 1678 {
d093f8e5 1679 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL,
b30275b8 1680 string_sprintf("deferred by smtp:connect event expansion: %s", s),
895fbaf2 1681 DEFER, FALSE);
a7538db1
JH
1682 yield = DEFER;
1683 goto SEND_QUIT;
1684 }
b30275b8 1685 }
a7538db1
JH
1686#endif
1687
061b7ebd
PP
1688 /* Now check if the helo_data expansion went well, and sign off cleanly if
1689 it didn't. */
41c7c167 1690
d093f8e5 1691 if (!sx->helo_data)
061b7ebd 1692 {
d093f8e5 1693 message = string_sprintf("failed to expand helo_data: %s",
061b7ebd 1694 expand_string_message);
d093f8e5 1695 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
061b7ebd
PP
1696 yield = DEFER;
1697 goto SEND_QUIT;
1698 }
41c7c167
PH
1699 }
1700
0756eb3c 1701/** Debugging without sending a message
d093f8e5 1702sx->addrlist->transport_return = DEFER;
0756eb3c
PH
1703goto SEND_QUIT;
1704**/
1705
1706 /* Errors that occur after this point follow an SMTP command, which is
1707 left in big_buffer by smtp_write_command() for use in error messages. */
1708
1709 smtp_command = big_buffer;
1710
1711 /* Tell the remote who we are...
1712
1713 February 1998: A convention has evolved that ESMTP-speaking MTAs include the
1714 string "ESMTP" in their greeting lines, so make Exim send EHLO if the
1715 greeting is of this form. The assumption was that the far end supports it
1716 properly... but experience shows that there are some that give 5xx responses,
1717 even though the banner includes "ESMTP" (there's a bloody-minded one that
1718 says "ESMTP not spoken here"). Cope with that case.
1719
1720 September 2000: Time has passed, and it seems reasonable now to always send
1721 EHLO at the start. It is also convenient to make the change while installing
1722 the TLS stuff.
1723
1724 July 2003: Joachim Wieland met a broken server that advertises "PIPELINING"
1725 but times out after sending MAIL FROM, RCPT TO and DATA all together. There
1726 would be no way to send out the mails, so there is now a host list
1727 "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the
1728 PIPELINING problem as well. Maybe it can also be useful to cure other
1729 problems with broken servers.
1730
1731 Exim originally sent "Helo" at this point and ran for nearly a year that way.
1732 Then somebody tried it with a Microsoft mailer... It seems that all other
1733 mailers use upper case for some reason (the RFC is quite clear about case
1734 independence) so, for peace of mind, I gave in. */
1735
d093f8e5 1736 sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK;
0756eb3c 1737
061b7ebd
PP
1738 /* Alas; be careful, since this goto is not an error-out, so conceivably
1739 we might set data between here and the target which we assume to exist
1740 and be usable. I can see this coming back to bite us. */
a7538db1 1741#ifdef SUPPORT_TLS
d093f8e5 1742 if (sx->smtps)
061b7ebd 1743 {
2d14f397 1744 smtp_peer_options |= PEER_OFFERED_TLS;
061b7ebd 1745 suppress_tls = FALSE;
d093f8e5 1746 sx->ob->tls_tempfail_tryclear = FALSE;
061b7ebd
PP
1747 smtp_command = US"SSL-on-connect";
1748 goto TLS_NEGOTIATE;
1749 }
a7538db1 1750#endif
061b7ebd 1751
d093f8e5 1752 if (sx->esmtp)
0756eb3c 1753 {
4e910c01 1754 if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n",
d093f8e5 1755 sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0)
0756eb3c 1756 goto SEND_FAILED;
d093f8e5
JH
1757 sx->esmtp_sent = TRUE;
1758 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
1759 sx->ob->command_timeout))
0756eb3c 1760 {
d093f8e5 1761 if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp)
895fbaf2
JH
1762 {
1763#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1764 sx->helo_response = string_copy(sx->buffer);
895fbaf2
JH
1765#endif
1766 goto RESPONSE_FAILED;
1767 }
d093f8e5 1768 sx->esmtp = FALSE;
0756eb3c 1769 }
895fbaf2 1770#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1771 sx->helo_response = string_copy(sx->buffer);
895fbaf2 1772#endif
0756eb3c
PH
1773 }
1774 else
0756eb3c
PH
1775 DEBUG(D_transport)
1776 debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
0756eb3c 1777
d093f8e5 1778 if (!sx->esmtp)
0756eb3c 1779 {
895fbaf2 1780 BOOL good_response;
d093f8e5
JH
1781 int n = sizeof(sx->buffer);
1782 uschar * rsp = sx->buffer;
a57ce043 1783
d093f8e5
JH
1784 if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2)
1785 { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; }
895fbaf2 1786
4e910c01 1787 if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "HELO %s\r\n", sx->helo_data) < 0)
0756eb3c 1788 goto SEND_FAILED;
d093f8e5
JH
1789 good_response = smtp_read_response(&sx->inblock, rsp, n,
1790 '2', sx->ob->command_timeout);
895fbaf2 1791#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1792 sx->helo_response = string_copy(rsp);
895fbaf2 1793#endif
a57ce043
JH
1794 if (!good_response)
1795 {
1796 /* Handle special logging for a closed connection after HELO
1797 when had previously sent EHLO */
1798
d093f8e5 1799 if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET))
a57ce043 1800 {
de6273b4
JH
1801 errno = ERRNO_SMTPCLOSED;
1802 goto EHLOHELO_FAILED;
a57ce043 1803 }
d093f8e5 1804 Ustrncpy(sx->buffer, rsp, sizeof(sx->buffer)/2);
a57ce043
JH
1805 goto RESPONSE_FAILED;
1806 }
0756eb3c
PH
1807 }
1808
d093f8e5 1809 sx->peer_offered = smtp_peer_options = 0;
2d14f397 1810
d093f8e5 1811 if (sx->esmtp || sx->lmtp)
2d14f397 1812 {
e9166683 1813 sx->peer_offered = ehlo_response(sx->buffer,
ff5aac2b 1814 PEER_OFFERED_TLS /* others checked later */
9094b84b 1815 );
f1513293 1816
0756eb3c
PH
1817 /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */
1818
a7538db1 1819#ifdef SUPPORT_TLS
d093f8e5 1820 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_TLS;
7ade712c 1821#endif
2d14f397 1822 }
0756eb3c
PH
1823 }
1824
57cc2785
JH
1825/* For continuing deliveries down the same channel, having re-exec'd the socket
1826is the standard input; for a socket held open from verify it is recorded
1827in the cutthrough context block. Either way we don't need to redo EHLO here
1828(but may need to do so for TLS - see below).
1829Set 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 {
57cc2785
JH
1841 if (cutthrough.fd >= 0 && cutthrough.callout_hold_only)
1842 {
1843 sx->inblock.sock = sx->outblock.sock = cutthrough.fd;
1844 sx->host->port = sx->port = cutthrough.host.port;
1845 }
1846 else
1847 {
1848 sx->inblock.sock = sx->outblock.sock = 0; /* stdin */
a843a57e 1849 smtp_port_for_connect(sx->host, sx->port); /* Record the port that was used */
57cc2785 1850 }
0756eb3c 1851 smtp_command = big_buffer;
02b41d71 1852 sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */
875512a3 1853
57cc2785
JH
1854 /* For a continued connection with TLS being proxied for us, or a
1855 held-open verify connection with TLS, nothing more to do. */
875512a3 1856
57cc2785
JH
1857 if ( continue_proxy_cipher
1858 || (cutthrough.fd >= 0 && cutthrough.callout_hold_only && cutthrough.is_tls)
1859 )
875512a3
JH
1860 {
1861 sx->peer_offered = smtp_peer_options;
1862 pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE);
57cc2785
JH
1863 HDEBUG(D_transport) debug_printf("continued connection, %s TLS\n",
1864 continue_proxy_cipher ? "proxied" : "verify conn with");
875512a3
JH
1865 return OK;
1866 }
1867 HDEBUG(D_transport) debug_printf("continued connection, no TLS\n");
0756eb3c
PH
1868 }
1869
1870/* If TLS is available on this connection, whether continued or not, attempt to
1871start up a TLS session, unless the host is in hosts_avoid_tls. If successful,
1872send another EHLO - the server may give a different answer in secure mode. We
1873use a separate buffer for reading the response to STARTTLS so that if it is
1874negative, the original EHLO data is available for subsequent analysis, should
1875the client not be required to use TLS. If the response is bad, copy the buffer
1876for error analysis. */
1877
1878#ifdef SUPPORT_TLS
2d14f397 1879if ( smtp_peer_options & PEER_OFFERED_TLS
5130845b 1880 && !suppress_tls
02b41d71 1881 && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK
e9166683 1882 && ( !sx->verify
02b41d71
JH
1883 || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK
1884 ) )
0756eb3c
PH
1885 {
1886 uschar buffer2[4096];
4e910c01 1887 if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "STARTTLS\r\n") < 0)
0756eb3c
PH
1888 goto SEND_FAILED;
1889
1890 /* If there is an I/O error, transmission of this message is deferred. If
1891 there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is
1892 false, we also defer. However, if there is a temporary rejection of STARTTLS
1893 and tls_tempfail_tryclear is true, or if there is an outright rejection of
1894 STARTTLS, we carry on. This means we will try to send the message in clear,
1895 unless the host is in hosts_require_tls (tested below). */
1896
d093f8e5
JH
1897 if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2',
1898 sx->ob->command_timeout))
0756eb3c 1899 {
4b0fe319
JH
1900 if ( errno != 0
1901 || buffer2[0] == 0
d093f8e5 1902 || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear)
4b0fe319 1903 )
0dda4340 1904 {
d093f8e5 1905 Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer));
9e7e0f6a 1906 sx->buffer[sizeof(sx->buffer)-1] = '\0';
0756eb3c 1907 goto RESPONSE_FAILED;
0dda4340 1908 }
0756eb3c
PH
1909 }
1910
1911 /* STARTTLS accepted: try to negotiate a TLS session. */
1912
1913 else
061b7ebd 1914 TLS_NEGOTIATE:
0756eb3c 1915 {
d093f8e5 1916 address_item * addr;
cf0c6164
JH
1917 uschar * errstr;
1918 int rc = tls_client_start(sx->inblock.sock, sx->host, sx->addrlist, sx->tblock,
0e66b3b6 1919# ifdef EXPERIMENTAL_DANE
cf0c6164 1920 sx->dane ? &tlsa_dnsa : NULL,
0e66b3b6 1921# endif
cf0c6164 1922 &errstr);
0756eb3c
PH
1923
1924 /* TLS negotiation failed; give an error. From outside, this function may
1925 be called again to try in clear on a new connection, if the options permit
1926 it for this host. */
1927
1928 if (rc != OK)
1929 {
6ebd79ec 1930# ifdef EXPERIMENTAL_DANE
d093f8e5 1931 if (sx->dane) log_write(0, LOG_MAIN,
cf0c6164
JH
1932 "DANE attempt failed; TLS connection to %s [%s]: %s",
1933 sx->host->name, sx->host->address, errstr);
6ebd79ec
JH
1934# endif
1935
de6273b4 1936 errno = ERRNO_TLSFAILURE;
cf0c6164 1937 message = string_sprintf("TLS session: %s", errstr);
d093f8e5 1938 sx->send_quit = FALSE;
0756eb3c
PH
1939 goto TLS_FAILED;
1940 }
1941
1942 /* TLS session is set up */
1943
2d14f397 1944 smtp_peer_options_wrap = smtp_peer_options;
d093f8e5 1945 for (addr = sx->addrlist; addr; addr = addr->next)
5ca2a9a1
PH
1946 if (addr->transport_return == PENDING_DEFER)
1947 {
817d9f57 1948 addr->cipher = tls_out.cipher;
9d1c15ef
JH
1949 addr->ourcert = tls_out.ourcert;
1950 addr->peercert = tls_out.peercert;
817d9f57 1951 addr->peerdn = tls_out.peerdn;
018058b2 1952 addr->ocsp = tls_out.ocsp;
5ca2a9a1 1953 }
0756eb3c
PH
1954 }
1955 }
1956
061b7ebd
PP
1957/* if smtps, we'll have smtp_command set to something else; always safe to
1958reset it here. */
1959smtp_command = big_buffer;
1960
41c7c167
PH
1961/* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If
1962helo_data is null, we are dealing with a connection that was passed from
1963another process, and so we won't have expanded helo_data above. We have to
1964expand it here. $sending_ip_address and $sending_port are set up right at the
1965start of the Exim process (in exim.c). */
0756eb3c 1966
817d9f57 1967if (tls_out.active >= 0)
0756eb3c 1968 {
061b7ebd 1969 char *greeting_cmd;
895fbaf2
JH
1970 BOOL good_response;
1971
d093f8e5 1972 if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data)))
41c7c167 1973 {
d093f8e5
JH
1974 uschar *message = string_sprintf("failed to expand helo_data: %s",
1975 expand_string_message);
1976 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
1977 yield = DEFER;
1978 goto SEND_QUIT;
41c7c167
PH
1979 }
1980
0d0e4455 1981 /* For SMTPS we need to wait for the initial OK response. */
d093f8e5 1982 if (sx->smtps)
061b7ebd 1983 {
d093f8e5
JH
1984 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
1985 '2', sx->ob->command_timeout);
895fbaf2 1986#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1987 sx->smtp_greeting = string_copy(sx->buffer);
895fbaf2
JH
1988#endif
1989 if (!good_response) goto RESPONSE_FAILED;
0d0e4455
PP
1990 }
1991
d093f8e5 1992 if (sx->esmtp)
0d0e4455
PP
1993 greeting_cmd = "EHLO";
1994 else
1995 {
1996 greeting_cmd = "HELO";
1997 DEBUG(D_transport)
1998 debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
061b7ebd
PP
1999 }
2000
4e910c01 2001 if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n",
d093f8e5 2002 sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0)
0756eb3c 2003 goto SEND_FAILED;
d093f8e5
JH
2004 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
2005 '2', sx->ob->command_timeout);
895fbaf2 2006#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 2007 sx->helo_response = string_copy(sx->buffer);
895fbaf2
JH
2008#endif
2009 if (!good_response) goto RESPONSE_FAILED;
2d14f397 2010 smtp_peer_options = 0;
0756eb3c
PH
2011 }
2012
2013/* If the host is required to use a secure channel, ensure that we
2014have one. */
2015
d093f8e5 2016else if ( sx->smtps
0e66b3b6 2017# ifdef EXPERIMENTAL_DANE
d093f8e5 2018 || sx->dane
0e66b3b6 2019# endif
d093f8e5 2020 || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK
7a31d643 2021 )
0756eb3c 2022 {
de6273b4 2023 errno = ERRNO_TLSREQUIRED;
c562fd30 2024 message = string_sprintf("a TLS session is required, but %s",
2d14f397
JH
2025 smtp_peer_options & PEER_OFFERED_TLS
2026 ? "an attempt to start TLS failed" : "the server did not offer TLS support");
0756eb3c
PH
2027 goto TLS_FAILED;
2028 }
0e66b3b6 2029#endif /*SUPPORT_TLS*/
0756eb3c
PH
2030
2031/* If TLS is active, we have just started it up and re-done the EHLO command,
2032so its response needs to be analyzed. If TLS is not active and this is a
2033continued session down a previously-used socket, we haven't just done EHLO, so
2034we skip this. */
2035
2036if (continue_hostname == NULL
a7538db1 2037#ifdef SUPPORT_TLS
817d9f57 2038 || tls_out.active >= 0
a7538db1 2039#endif
0756eb3c
PH
2040 )
2041 {
d093f8e5 2042 if (sx->esmtp || sx->lmtp)
2d14f397 2043 {
e9166683 2044 sx->peer_offered = ehlo_response(sx->buffer,
d093f8e5
JH
2045 0 /* no TLS */
2046 | (sx->lmtp && sx->ob->lmtp_ignore_quota ? PEER_OFFERED_IGNQ : 0)
2047 | PEER_OFFERED_CHUNKING
2048 | PEER_OFFERED_PRDR
9094b84b 2049#ifdef SUPPORT_I18N
d093f8e5
JH
2050 | (sx->addrlist->prop.utf8_msg ? PEER_OFFERED_UTF8 : 0)
2051 /*XXX if we hand peercaps on to continued-conn processes,
2052 must not depend on this addr */
9094b84b 2053#endif
d093f8e5
JH
2054 | PEER_OFFERED_DSN
2055 | PEER_OFFERED_PIPE
2056 | (sx->ob->size_addition >= 0 ? PEER_OFFERED_SIZE : 0)
9094b84b
JH
2057 );
2058
2d14f397
JH
2059 /* Set for IGNOREQUOTA if the response to LHLO specifies support and the
2060 lmtp_ignore_quota option was set. */
f1513293 2061
d093f8e5 2062 sx->igquotstr = sx->peer_offered & PEER_OFFERED_IGNQ ? US" IGNOREQUOTA" : US"";
f1513293 2063
2d14f397
JH
2064 /* If the response to EHLO specified support for the SIZE parameter, note
2065 this, provided size_addition is non-negative. */
f1513293 2066
d093f8e5 2067 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_SIZE;
0756eb3c 2068
2d14f397
JH
2069 /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched
2070 the current host, esmtp will be false, so PIPELINING can never be used. If
2071 the current host matches hosts_avoid_pipelining, don't do it. */
0756eb3c 2072
d093f8e5
JH
2073 if ( sx->peer_offered & PEER_OFFERED_PIPE
2074 && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK)
2d14f397 2075 smtp_peer_options |= PEER_OFFERED_PIPE;
0756eb3c 2076
2d14f397
JH
2077 DEBUG(D_transport) debug_printf("%susing PIPELINING\n",
2078 smtp_peer_options & PEER_OFFERED_PIPE ? "" : "not ");
0756eb3c 2079
d093f8e5
JH
2080 if ( sx->peer_offered & PEER_OFFERED_CHUNKING
2081 && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK)
2082 sx->peer_offered &= ~PEER_OFFERED_CHUNKING;
f98442df 2083
d093f8e5 2084 if (sx->peer_offered & PEER_OFFERED_CHUNKING)
2d14f397 2085 {DEBUG(D_transport) debug_printf("CHUNKING usable\n");}
0756eb3c 2086
8ccd00b1 2087#ifndef DISABLE_PRDR
d093f8e5
JH
2088 if ( sx->peer_offered & PEER_OFFERED_PRDR
2089 && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK)
2090 sx->peer_offered &= ~PEER_OFFERED_PRDR;
fd98a5c6 2091
d093f8e5 2092 if (sx->peer_offered & PEER_OFFERED_PRDR)
2d14f397 2093 {DEBUG(D_transport) debug_printf("PRDR usable\n");}
fd98a5c6
JH
2094#endif
2095
2d14f397 2096 /* Note if the server supports DSN */
d093f8e5 2097 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_DSN;
2d14f397 2098 DEBUG(D_transport) debug_printf("%susing DSN\n",
d093f8e5 2099 sx->peer_offered & PEER_OFFERED_DSN ? "" : "not ");
6c1c3d1d 2100
2d14f397
JH
2101 /* Note if the response to EHLO specifies support for the AUTH extension.
2102 If it has, check that this host is one we want to authenticate to, and do
2103 the business. The host name and address must be available when the
2104 authenticator's client driver is running. */
0756eb3c 2105
d093f8e5
JH
2106 switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host,
2107 sx->ob, sx->esmtp, &sx->inblock, &sx->outblock))
2d14f397
JH
2108 {
2109 default: goto SEND_QUIT;
2110 case OK: break;
2111 case FAIL_SEND: goto SEND_FAILED;
2112 case FAIL: goto RESPONSE_FAILED;
2113 }
0756eb3c
PH
2114 }
2115 }
2d14f397 2116pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE);
0756eb3c
PH
2117
2118/* The setting up of the SMTP call is now complete. Any subsequent errors are
2119message-specific. */
2120
d093f8e5 2121sx->setting_up = FALSE;
0756eb3c 2122
8c5d388a 2123#ifdef SUPPORT_I18N
d093f8e5 2124if (sx->addrlist->prop.utf8_msg)
9094b84b 2125 {
d093f8e5
JH
2126 sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt
2127 && !sx->addrlist->prop.utf8_downcvt_maybe;
2128 DEBUG(D_transport) if (!sx->utf8_needed)
59a286ef 2129 debug_printf("utf8: %s downconvert\n",
d093f8e5 2130 sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional");
9094b84b
JH
2131 }
2132
7ade712c 2133/* If this is an international message we need the host to speak SMTPUTF8 */
d093f8e5 2134if (sx->utf8_needed && !(sx->peer_offered & PEER_OFFERED_UTF8))
7ade712c
JH
2135 {
2136 errno = ERRNO_UTF8_FWD;
2137 goto RESPONSE_FAILED;
2138 }
2139#endif
2140
d093f8e5
JH
2141return OK;
2142
2143
2144 {
2145 int code;
d093f8e5
JH
2146
2147 RESPONSE_FAILED:
d093f8e5 2148 message = NULL;
de6273b4 2149 sx->send_quit = check_response(sx->host, &errno, sx->addrlist->more_errno,
d093f8e5
JH
2150 sx->buffer, &code, &message, &pass_message);
2151 goto FAILED;
d093f8e5
JH
2152
2153 SEND_FAILED:
d093f8e5
JH
2154 code = '4';
2155 message = US string_sprintf("send() to %s [%s] failed: %s",
829dd842 2156 sx->host->name, sx->host->address, strerror(errno));
d093f8e5
JH
2157 sx->send_quit = FALSE;
2158 goto FAILED;
d093f8e5
JH
2159
2160 /* This label is jumped to directly when a TLS negotiation has failed,
2161 or was not done for a host for which it is required. Values will be set
829dd842 2162 in message and errno, and setting_up will always be true. Treat as
d093f8e5
JH
2163 a temporary error. */
2164
de6273b4
JH
2165 EHLOHELO_FAILED:
2166 code = '4';
2167 message = string_sprintf("Remote host closed connection in response to %s"
2168 " (EHLO response was: %s)", smtp_command, sx->buffer);
2169 sx->send_quit = FALSE;
2170 goto FAILED;
2171
d093f8e5
JH
2172#ifdef SUPPORT_TLS
2173 TLS_FAILED:
de6273b4
JH
2174 code = '4';
2175 goto FAILED;
d093f8e5
JH
2176#endif
2177
2178 /* The failure happened while setting up the call; see if the failure was
2179 a 5xx response (this will either be on connection, or following HELO - a 5xx
e69636bc
JH
2180 after EHLO causes it to try HELO). If so, and there are no more hosts to try,
2181 fail all addresses, as this host is never going to accept them. For other
2182 errors during setting up (timeouts or whatever), defer all addresses, and
2183 yield DEFER, so that the host is not tried again for a while.
2184
2185 XXX This peeking for another host feels like a layering violation. We want
2186 to note the host as unusable, but down here we shouldn't know if this was
2187 the last host to try for the addr(list). Perhaps the upper layer should be
2188 the one to do set_errno() ? The problem is that currently the addr is where
2189 errno etc. are stashed, but until we run out of hosts to try the errors are
2190 host-specific. Maybe we should enhance the host_item definition? */
d093f8e5 2191
de6273b4 2192FAILED:
d093f8e5 2193 sx->ok = FALSE; /* For when reached by GOTO */
e69636bc
JH
2194 set_errno(sx->addrlist, errno, message,
2195 sx->host->next
2196 ? DEFER
2197 : code == '5'
d093f8e5 2198#ifdef SUPPORT_I18N
e69636bc 2199 || errno == ERRNO_UTF8_FWD
d093f8e5 2200#endif
e69636bc
JH
2201 ? FAIL : DEFER,
2202 pass_message, sx->host
d093f8e5
JH
2203#ifdef EXPERIMENTAL_DSN_INFO
2204 , sx->smtp_greeting, sx->helo_response
2205#endif
2206 );
e69636bc 2207 yield = DEFER;
d093f8e5
JH
2208 }
2209
2210
2211SEND_QUIT:
2212
2213if (sx->send_quit)
4e910c01 2214 (void)smtp_write_command(&sx->outblock, SCMD_FLUSH, "QUIT\r\n");
d093f8e5 2215
d093f8e5
JH
2216#ifdef SUPPORT_TLS
2217tls_close(FALSE, TRUE);
2218#endif
2219
2220/* Close the socket, and return the appropriate value, first setting
2221works because the NULL setting is passed back to the calling process, and
2222remote_max_parallel is forced to 1 when delivering over an existing connection,
b7d3afcf 2223*/
d093f8e5 2224
e1d04f48 2225HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
d093f8e5
JH
2226if (sx->send_quit)
2227 {
2228 shutdown(sx->outblock.sock, SHUT_WR);
2229 if (fcntl(sx->inblock.sock, F_SETFL, O_NONBLOCK) == 0)
2230 for (rc = 16; read(sx->inblock.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;)
2231 rc--; /* drain socket */
02b41d71 2232 sx->send_quit = FALSE;
d093f8e5
JH
2233 }
2234(void)close(sx->inblock.sock);
02b41d71 2235sx->inblock.sock = sx->outblock.sock = -1;
d093f8e5
JH
2236
2237#ifndef DISABLE_EVENT
2238(void) event_raise(sx->tblock->event_action, US"tcp:close", NULL);
2239#endif
2240
2241continue_transport = NULL;
2242continue_hostname = NULL;
2243return yield;
2244}
2245
2246
9be4572b
JH
2247
2248
2249/* Create the string of options that will be appended to the MAIL FROM:
2250in the connection context buffer */
2251
2252static int
2253build_mailcmd_options(smtp_context * sx, address_item * addrlist)
2254{
2255uschar * p = sx->buffer;
2256address_item * addr;
2257int address_count;
2258
2259*p = 0;
2260
2261/* If we know the receiving MTA supports the SIZE qualification,
2262send it, adding something to the message size to allow for imprecision
2263and things that get added en route. Exim keeps the number of lines
2264in a message, so we can give an accurate value for the original message, but we
2265need some additional to handle added headers. (Double "." characters don't get
2266included in the count.) */
2267
2268if (sx->peer_offered & PEER_OFFERED_SIZE)
2269 {
328c5688
JH
2270/*XXX problem here under spool_files_wireformat?
2271Or just forget about lines? Or inflate by a fixed proportion? */
2272
9be4572b
JH
2273 sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition);
2274 while (*p) p++;
2275 }
2276
2277#ifndef DISABLE_PRDR
2278/* If it supports Per-Recipient Data Reponses, and we have omre than one recipient,
2279request that */
2280
2281sx->prdr_active = FALSE;
2282if (sx->peer_offered & PEER_OFFERED_PRDR)
2283 for (addr = addrlist; addr; addr = addr->next)
2284 if (addr->transport_return == PENDING_DEFER)
2285 {
2286 for (addr = addr->next; addr; addr = addr->next)
2287 if (addr->transport_return == PENDING_DEFER)
2288 { /* at least two recipients to send */
2289 sx->prdr_active = TRUE;
2290 sprintf(CS p, " PRDR"); p += 5;
2291 break;
2292 }
2293 break;
2294 }
2295#endif
2296
2297#ifdef SUPPORT_I18N
2298/* If it supports internationalised messages, and this meesage need that,
2299request it */
2300
2301if ( sx->peer_offered & PEER_OFFERED_UTF8
2302 && addrlist->prop.utf8_msg
2303 && !addrlist->prop.utf8_downcvt
2304 )
2305 Ustrcpy(p, " SMTPUTF8"), p += 9;
2306#endif
2307
2308/* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */
2309for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0;
2310 addr && address_count < sx->max_rcpt;
2311 addr = addr->next) if (addr->transport_return == PENDING_DEFER)
2312 {
2313 address_count++;
2314 if (!(addr->dsn_flags & rf_dsnlasthop))
2315 {
2316 sx->dsn_all_lasthop = FALSE;
2317 break;
2318 }
2319 }
2320
2321/* Add any DSN flags to the mail command */
2322
2323if (sx->peer_offered & PEER_OFFERED_DSN && !sx->dsn_all_lasthop)
2324 {
2325 if (dsn_ret == dsn_ret_hdrs)
2326 { Ustrcpy(p, " RET=HDRS"); p += 9; }
2327 else if (dsn_ret == dsn_ret_full)
2328 { Ustrcpy(p, " RET=FULL"); p += 9; }
2329
2330 if (dsn_envid)
2331 {
2332 string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid);
2333 while (*p) p++;
2334 }
2335 }
2336
2337/* If an authenticated_sender override has been specified for this transport
2338instance, expand it. If the expansion is forced to fail, and there was already
2339an authenticated_sender for this message, the original value will be used.
2340Other expansion failures are serious. An empty result is ignored, but there is
2341otherwise no check - this feature is expected to be used with LMTP and other
2342cases where non-standard addresses (e.g. without domains) might be required. */
2343
2344if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob))
2345 return ERROR;
2346
2347return OK;
2348}
2349
2350
2351static void
2352build_rcptcmd_options(smtp_context * sx, const address_item * addr)
2353{
2354uschar * p = sx->buffer;
2355*p = 0;
2356
2357/* Add any DSN flags to the rcpt command */
2358
2359if (sx->peer_offered & PEER_OFFERED_DSN && !(addr->dsn_flags & rf_dsnlasthop))
2360 {
2361 if (addr->dsn_flags & rf_dsnflags)
2362 {
2363 int i;
2364 BOOL first = TRUE;
2365
2366 Ustrcpy(p, " NOTIFY=");
2367 while (*p) p++;
2368 for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i])
2369 {
2370 if (!first) *p++ = ',';
2371 first = FALSE;
2372 Ustrcpy(p, rf_names[i]);
2373 while (*p) p++;
2374 }
2375 }
2376
2377 if (addr->dsn_orcpt)
2378 {
2379 string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s",
2380 addr->dsn_orcpt);
2381 while (*p) p++;
2382 }
2383 }
2384}
2385
2386
d9c3c8ed
JH
2387
2388/*
2389Return:
e9166683
JH
2390 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL)
2391 -1 MAIL response error
2392 -2 any non-MAIL read i/o error
2393 -3 non-MAIL response timeout
2394 -4 internal error; channel still usable
2395 -5 transmit failed
d9c3c8ed
JH
2396 */
2397
2398int
2399smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield)
2400{
2401address_item * addr;
2402int address_count;
2403int rc;
2404
2405if (build_mailcmd_options(sx, sx->first_addr) != OK)
2406 {
2407 *yield = ERROR;
e9166683 2408 return -4;
d9c3c8ed
JH
2409 }
2410
2411/* From here until we send the DATA command, we can make use of PIPELINING
2412if the server host supports it. The code has to be able to check the responses
2413at any point, for when the buffer fills up, so we write it totally generally.
2414When PIPELINING is off, each command written reports that it has flushed the
2415buffer. */
2416
2417sx->pending_MAIL = TRUE; /* The block starts with MAIL */
2418
2419 {
2420 uschar * s = sx->from_addr;
2421#ifdef SUPPORT_I18N
2422 uschar * errstr = NULL;
2423
2424 /* If we must downconvert, do the from-address here. Remember we had to
2425 for the to-addresses (done below), and also (ugly) for re-doing when building
2426 the delivery log line. */
2427
2428 if ( sx->addrlist->prop.utf8_msg
2429 && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & PEER_OFFERED_UTF8))
2430 )
2431 {
2432 if (s = string_address_utf8_to_alabel(s, &errstr), errstr)
2433 {
2434 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE);
2435 *yield = ERROR;
e9166683 2436 return -4;
d9c3c8ed
JH
2437 }
2438 setflag(sx->addrlist, af_utf8_downcvt);
2439 }
2440#endif
2441
4e910c01 2442 rc = smtp_write_command(&sx->outblock, pipelining_active ? SCMD_BUFFER : SCMD_FLUSH,
d9c3c8ed
JH
2443 "MAIL FROM:<%s>%s\r\n", s, sx->buffer);
2444 }
2445
2446mail_command = string_copy(big_buffer); /* Save for later error message */
2447
2448switch(rc)
2449 {
2450 case -1: /* Transmission error */
e9166683 2451 return -5;
d9c3c8ed 2452
df5b41e3 2453 case +1: /* Cmd was sent */
d9c3c8ed
JH
2454 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
2455 sx->ob->command_timeout))
2456 {
2457 if (errno == 0 && sx->buffer[0] == '4')
2458 {
2459 errno = ERRNO_MAIL4XX;
2460 sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
2461 }
2462 return -1;
2463 }
2464 sx->pending_MAIL = FALSE;
2465 break;
e9166683
JH
2466
2467 /* otherwise zero: command queued for pipeline */
d9c3c8ed
JH
2468 }
2469
2470/* Pass over all the relevant recipient addresses for this host, which are the
2471ones that have status PENDING_DEFER. If we are using PIPELINING, we can send
2472several before we have to read the responses for those seen so far. This
2473checking is done by a subroutine because it also needs to be done at the end.
2474Send only up to max_rcpt addresses at a time, leaving next_addr pointing to
2475the next one if not all are sent.
2476
2477In the MUA wrapper situation, we want to flush the PIPELINING buffer for the
2478last address because we want to abort if any recipients have any kind of
2479problem, temporary or permanent. We know that all recipient addresses will have
2480the PENDING_DEFER status, because only one attempt is ever made, and we know
e9166683
JH
2481that max_rcpt will be large, so all addresses will be done at once.
2482
2483For verify we flush the pipeline after any (the only) rcpt address. */
d9c3c8ed
JH
2484
2485for (addr = sx->first_addr, address_count = 0;
2486 addr && address_count < sx->max_rcpt;
2487 addr = addr->next) if (addr->transport_return == PENDING_DEFER)
2488 {
2489 int count;
2490 BOOL no_flush;
2491 uschar * rcpt_addr;
2492
2493 addr->dsn_aware = sx->peer_offered & PEER_OFFERED_DSN
2494 ? dsn_support_yes : dsn_support_no;
2495
2496 address_count++;
4c2471ca
JH
2497 no_flush = pipelining_active && !sx->verify
2498 && (!mua_wrapper || addr->next && address_count < sx->max_rcpt);
d9c3c8ed
JH
2499
2500 build_rcptcmd_options(sx, addr);
2501
2502 /* Now send the RCPT command, and process outstanding responses when
2503 necessary. After a timeout on RCPT, we just end the function, leaving the
2504 yield as OK, because this error can often mean that there is a problem with
2505 just one address, so we don't want to delay the host. */
2506
2507 rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes);
2508
2509#ifdef SUPPORT_I18N
2510 if ( testflag(sx->addrlist, af_utf8_downcvt)
2511 && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL))
2512 )
2513 {
2514 /*XXX could we use a per-address errstr here? Not fail the whole send? */
2515 errno = ERRNO_EXPANDFAIL;
e9166683 2516 return -5; /*XXX too harsh? */
d9c3c8ed
JH
2517 }
2518#endif
2519
4e910c01
JH
2520 count = smtp_write_command(&sx->outblock, no_flush ? SCMD_BUFFER : SCMD_FLUSH,
2521 "RCPT TO:<%s>%s%s\r\n", rcpt_addr, sx->igquotstr, sx->buffer);
d9c3c8ed 2522
e9166683 2523 if (count < 0) return -5;
d9c3c8ed
JH
2524 if (count > 0)
2525 {
df5b41e3 2526 switch(sync_responses(sx, count, 0))
d9c3c8ed
JH
2527 {
2528 case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */
2529 case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */
e9166683 2530 break;
d9c3c8ed
JH
2531
2532 case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
2533 if (!sx->lmtp) /* can't tell about progress yet */
2534 sx->completed_addr = TRUE;
2535 case 0: /* No 2xx or 5xx, but no probs */
2536 break;
2537
e9166683
JH
2538 case -1: return -3; /* Timeout on RCPT */
2539 case -2: return -2; /* non-MAIL read i/o error */
2540 default: return -1; /* any MAIL error */
d9c3c8ed
JH
2541 }
2542 sx->pending_MAIL = FALSE; /* Dealt with MAIL */
2543 }
2544 } /* Loop for next address */
2545
2546sx->next_addr = addr;
2547return 0;
2548}
2549
2550
875512a3
JH
2551#ifdef SUPPORT_TLS
2552/*****************************************************
2553* Proxy TLS connection for another transport process *
2554******************************************************/
2555/*
57cc2785
JH
2556Use the given buffer as a staging area, and select on both the given fd
2557and the TLS'd client-fd for data to read (per the coding in ip_recv() and
875512a3
JH
2558fd_ready() this is legitimate). Do blocking full-size writes, and reads
2559under a timeout.
2560
2561Arguments:
57cc2785
JH
2562 buf space to use for buffering
2563 bufsiz size of buffer
875512a3
JH
2564 proxy_fd comms to proxied process
2565 timeout per-read timeout, seconds
2566*/
2567
57cc2785
JH
2568void
2569smtp_proxy_tls(uschar * buf, size_t bsize, int proxy_fd, int timeout)
875512a3
JH
2570{
2571fd_set fds;
2572int max_fd = MAX(proxy_fd, tls_out.active) + 1;
2573int rc, i, fd_bits, nbytes;
2574
2575set_process_info("proxying TLS connection for continued transport");
2576FD_ZERO(&fds);
2577FD_SET(tls_out.active, &fds);
2578FD_SET(proxy_fd, &fds);
2579
2580for (fd_bits = 3; fd_bits; )
2581 {
2582 time_t time_left = timeout;
2583 time_t time_start = time(NULL);
2584
2585 /* wait for data */
2586 do
2587 {
2588 struct timeval tv = { time_left, 0 };
2589
2590 rc = select(max_fd, (SELECT_ARG2_TYPE *)&fds, NULL, NULL, &tv);
2591
2592 if (rc < 0 && errno == EINTR)
2593 if ((time_left -= time(NULL) - time_start) > 0) continue;
2594
2595 if (rc <= 0)
2596 {
2597 DEBUG(D_transport) if (rc == 0) debug_printf("%s: timed out\n", __FUNCTION__);
2598 return;
2599 }
2600 }
2601 while (rc < 0 || !(FD_ISSET(tls_out.active, &fds) || FD_ISSET(proxy_fd, &fds)));
2602
2603 /* handle inbound data */
2604 if (FD_ISSET(tls_out.active, &fds))
57cc2785 2605 if ((rc = tls_read(FALSE, buf, bsize)) <= 0)
875512a3
JH
2606 {
2607 fd_bits &= ~1;
2608 FD_CLR(tls_out.active, &fds);
2609 shutdown(proxy_fd, SHUT_WR);
2610 }
2611 else
2612 {
2613 for (nbytes = 0; rc - nbytes > 0; nbytes += i)
57cc2785 2614 if ((i = write(proxy_fd, buf + nbytes, rc - nbytes)) < 0) return;
875512a3
JH
2615 }
2616 else if (fd_bits & 1)
2617 FD_SET(tls_out.active, &fds);
2618
2619 /* handle outbound data */
2620 if (FD_ISSET(proxy_fd, &fds))
57cc2785 2621 if ((rc = read(proxy_fd, buf, bsize)) <= 0)
875512a3
JH
2622 {
2623 fd_bits &= ~2;
2624 FD_CLR(proxy_fd, &fds);
2625 shutdown(tls_out.active, SHUT_WR);
2626 }
2627 else
2628 {
2629 for (nbytes = 0; rc - nbytes > 0; nbytes += i)
925ac8e4
JH
2630 if ((i = tls_write(FALSE, buf + nbytes, rc - nbytes, FALSE)) < 0)
2631 return;
875512a3
JH
2632 }
2633 else if (fd_bits & 2)
2634 FD_SET(proxy_fd, &fds);
2635 }
2636}
2637#endif
2638
2639
d093f8e5
JH
2640/*************************************************
2641* Deliver address list to given host *
2642*************************************************/
2643
2644/* If continue_hostname is not null, we get here only when continuing to
2645deliver down an existing channel. The channel was passed as the standard
2646input. TLS is never active on a passed channel; the previous process always
2647closes it down before passing the connection on.
2648
2649Otherwise, we have to make a connection to the remote host, and do the
2650initial protocol exchange.
2651
2652When running as an MUA wrapper, if the sender or any recipient is rejected,
2653temporarily or permanently, we force failure for all recipients.
2654
2655Arguments:
2656 addrlist chain of potential addresses to deliver; only those whose
2657 transport_return field is set to PENDING_DEFER are currently
2658 being processed; others should be skipped - they have either
2659 been delivered to an earlier host or IP address, or been
2660 failed by one of them.
2661 host host to deliver to
2662 host_af AF_INET or AF_INET6
a843a57e
JH
2663 defport default TCP/IP port to use if host does not specify, in host
2664 byte order
d093f8e5
JH
2665 interface interface to bind to, or NULL
2666 tblock transport instance block
2667 message_defer set TRUE if yield is OK, but all addresses were deferred
2668 because of a non-recipient, non-host failure, that is, a
2669 4xx response to MAIL FROM, DATA, or ".". This is a defer
2670 that is specific to the message.
2671 suppress_tls if TRUE, don't attempt a TLS connection - this is set for
2672 a second attempt after TLS initialization fails
2673
2674Returns: OK - the connection was made and the delivery attempted;
2675 the result for each address is in its data block.
2676 DEFER - the connection could not be made, or something failed
2677 while setting up the SMTP session, or there was a
2678 non-message-specific error, such as a timeout.
2679 ERROR - a filter command is specified for this transport,
2680 and there was a problem setting it up; OR helo_data
2681 or add_headers or authenticated_sender is specified
2682 for this transport, and the string failed to expand
2683*/
2684
2685static int
a843a57e 2686smtp_deliver(address_item *addrlist, host_item *host, int host_af, int defport,
d093f8e5
JH
2687 uschar *interface, transport_instance *tblock,
2688 BOOL *message_defer, BOOL suppress_tls)
2689{
2690address_item *addr;
d093f8e5 2691int yield = OK;
d093f8e5
JH
2692int save_errno;
2693int rc;
2694time_t start_delivery_time = time(NULL);
2695
d093f8e5
JH
2696BOOL pass_message = FALSE;
2697uschar *message = NULL;
2698uschar new_message_id[MESSAGE_ID_LENGTH + 1];
2699uschar *p;
2700
2701smtp_context sx;
2702
2703suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */
02b41d71 2704*message_defer = FALSE;
d093f8e5
JH
2705
2706sx.addrlist = addrlist;
2707sx.host = host;
2708sx.host_af = host_af,
a843a57e 2709sx.port = defport;
d093f8e5 2710sx.interface = interface;
02b41d71 2711sx.helo_data = NULL;
d093f8e5 2712sx.tblock = tblock;
e9166683 2713sx.verify = FALSE;
d093f8e5 2714
9be4572b
JH
2715/* Get the channel set up ready for a message (MAIL FROM being the next
2716SMTP command to send */
2717
e9166683 2718if ((rc = smtp_setup_conn(&sx, suppress_tls)) != OK)
d093f8e5
JH
2719 return rc;
2720
0756eb3c
PH
2721/* If there is a filter command specified for this transport, we can now
2722set it up. This cannot be done until the identify of the host is known. */
2723
e9166683 2724if (tblock->filter_command)
0756eb3c 2725 {
9b989985 2726 transport_filter_timeout = tblock->filter_timeout;
0756eb3c
PH
2727
2728 /* On failure, copy the error to all addresses, abandon the SMTP call, and
2729 yield ERROR. */
2730
36d295f1
JH
2731 if (!transport_set_up_command(&transport_filter_argv,
2732 tblock->filter_command, TRUE, DEFER, addrlist,
2733 string_sprintf("%.50s transport", tblock->name), NULL))
0756eb3c 2734 {
895fbaf2
JH
2735 set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER,
2736 FALSE);
0756eb3c
PH
2737 yield = ERROR;
2738 goto SEND_QUIT;
2739 }
48f1c853
JH
2740
2741 if ( transport_filter_argv
2742 && *transport_filter_argv
2743 && **transport_filter_argv
d093f8e5 2744 && sx.peer_offered & PEER_OFFERED_CHUNKING
48f1c853
JH
2745 )
2746 {
d093f8e5 2747 sx.peer_offered &= ~PEER_OFFERED_CHUNKING;
48f1c853
JH
2748 DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n");
2749 }
0756eb3c
PH
2750 }
2751
36d295f1 2752sx.first_addr = addrlist;
0756eb3c
PH
2753
2754/* For messages that have more than the maximum number of envelope recipients,
2755we want to send several transactions down the same SMTP connection. (See
2756comments in deliver.c as to how this reconciles, heuristically, with
2757remote_max_parallel.) This optimization was added to Exim after the following
2758code was already working. The simplest way to put it in without disturbing the
2759code was to use a goto to jump back to this point when there is another
2760transaction to handle. */
2761
2762SEND_MESSAGE:
d9c3c8ed 2763sx.from_addr = return_path;
36d295f1 2764sx.sync_addr = sx.first_addr;
d093f8e5
JH
2765sx.ok = FALSE;
2766sx.send_rset = TRUE;
d9c3c8ed 2767sx.completed_addr = FALSE;
0756eb3c
PH
2768
2769
57cc2785
JH
2770/* If we are a continued-connection-after-verify the MAIL and RCPT
2771commands were already sent; do not re-send but do mark the addrs as
2772having been accepted up to RCPT stage. A traditional cont-conn
2773always has a sequence number greater than one. */
6b62e899 2774
57cc2785 2775if (continue_hostname && continue_sequence == 1)
0756eb3c 2776 {
57cc2785 2777 address_item * addr;
0756eb3c 2778
57cc2785 2779 sx.peer_offered = smtp_peer_options;
d8b8dd15 2780 sx.pending_MAIL = FALSE;
57cc2785
JH
2781 sx.ok = TRUE;
2782 sx.next_addr = NULL;
0756eb3c 2783
57cc2785
JH
2784 for (addr = addrlist; addr; addr = addr->next)
2785 addr->transport_return = PENDING_OK;
2786 }
2787else
0756eb3c 2788 {
57cc2785
JH
2789 /* Initiate a message transfer. */
2790
2791 switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield))
2792 {
2793 case 0: break;
2794 case -1: case -2: goto RESPONSE_FAILED;
2795 case -3: goto END_OFF;
2796 case -4: goto SEND_QUIT;
2797 default: goto SEND_FAILED;
2798 }
2799
2800 /* If we are an MUA wrapper, abort if any RCPTs were rejected, either
2801 permanently or temporarily. We should have flushed and synced after the last
2802 RCPT. */
2803
2804 if (mua_wrapper)
2805 {
4c2471ca
JH
2806 address_item * a;
2807 unsigned cnt;
2808
2809 for (a = sx.first_addr, cnt = 0; a && cnt < sx.max_rcpt; a = a->next, cnt++)
2810 if (a->transport_return != PENDING_OK)
57cc2785
JH
2811 {
2812 /*XXX could we find a better errno than 0 here? */
4c2471ca
JH
2813 set_errno_nohost(addrlist, 0, a->message, FAIL,
2814 testflag(a, af_pass_message));
57cc2785
JH
2815 sx.ok = FALSE;
2816 break;
2817 }
2818 }
0756eb3c
PH
2819 }
2820
2821/* If ok is TRUE, we know we have got at least one good recipient, and must now
2822send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still
2823have a good recipient buffered up if we are pipelining. We don't want to waste
2824time sending DATA needlessly, so we only send it if either ok is TRUE or if we
6d5c916c
JH
2825are pipelining. The responses are all handled by sync_responses().
2826If using CHUNKING, do not send a BDAT until we know how big a chunk we want
2827to send is. */
0756eb3c 2828
d093f8e5
JH
2829if ( !(sx.peer_offered & PEER_OFFERED_CHUNKING)
2830 && (sx.ok || (pipelining_active && !mua_wrapper)))
0756eb3c 2831 {
4e910c01 2832 int count = smtp_write_command(&sx.outblock, SCMD_FLUSH, "DATA\r\n");
6d5c916c 2833
0756eb3c 2834 if (count < 0) goto SEND_FAILED;
df5b41e3 2835 switch(sync_responses(&sx, count, sx.ok ? +1 : -1))
0756eb3c 2836 {
d093f8e5 2837 case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */
d9c3c8ed 2838 case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */
0756eb3c
PH
2839 break;
2840
d093f8e5 2841 case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
d9c3c8ed 2842 if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */
0756eb3c
PH
2843 case 0: break; /* No 2xx or 5xx, but no probs */
2844
2845 case -1: goto END_OFF; /* Timeout on RCPT */
2846 default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */
2847 }
0d9fa8c0 2848 pipelining_active = FALSE;
87cb4a16 2849 data_command = string_copy(big_buffer); /* Save for later error message */
0756eb3c
PH
2850 }
2851
0756eb3c
PH
2852/* If there were no good recipients (but otherwise there have been no
2853problems), just set ok TRUE, since we have handled address-specific errors
2854already. Otherwise, it's OK to send the message. Use the check/escape mechanism
2855for handling the SMTP dot-handling protocol, flagging to apply to headers as
2856well as body. Set the appropriate timeout value to be used for each chunk.
2857(Haven't been able to make it work using select() for writing yet.) */
2858
d093f8e5 2859if (!(sx.peer_offered & PEER_OFFERED_CHUNKING) && !sx.ok)
6d5c916c
JH
2860 {
2861 /* Save the first address of the next batch. */
d9c3c8ed 2862 sx.first_addr = sx.next_addr;
6d5c916c 2863
d093f8e5 2864 sx.ok = TRUE;
6d5c916c 2865 }
ff5aac2b 2866else
0756eb3c 2867 {
6b46ecc6 2868 transport_ctx tctx = {
42055a33 2869 sx.inblock.sock,
6b46ecc6
JH
2870 tblock,
2871 addrlist,
2872 US".", US"..", /* Escaping strings */
65de12cc 2873 topt_use_crlf | topt_escape_headers
6b46ecc6
JH
2874 | (tblock->body_only ? topt_no_headers : 0)
2875 | (tblock->headers_only ? topt_no_body : 0)
2876 | (tblock->return_path_add ? topt_add_return_path : 0)
2877 | (tblock->delivery_date_add ? topt_add_delivery_date : 0)
2878 | (tblock->envelope_to_add ? topt_add_envelope_to : 0)
2879 };
2880
6d5c916c
JH
2881 /* If using CHUNKING we need a callback from the generic transport
2882 support to us, for the sending of BDAT smtp commands and the reaping
2883 of responses. The callback needs a whole bunch of state so set up
2884 a transport-context structure to be passed around. */
2885
d093f8e5 2886 if (sx.peer_offered & PEER_OFFERED_CHUNKING)
59932f7d 2887 {
65de12cc 2888 tctx.check_string = tctx.escape_string = NULL;
6d5c916c
JH
2889 tctx.options |= topt_use_bdat;
2890 tctx.chunk_cb = smtp_chunk_cmd_callback;
e9166683
JH
2891 sx.pending_BDAT = FALSE;
2892 sx.good_RCPT = sx.ok;
2893 sx.cmd_count = 0;
2894 tctx.smtp_context = &sx;
59932f7d
JH
2895 }
2896 else
65de12cc 2897 tctx.options |= topt_end_dot;
59932f7d 2898
6d5c916c 2899 /* Save the first address of the next batch. */
d9c3c8ed 2900 sx.first_addr = sx.next_addr;
6d5c916c 2901
e027f545
JH
2902 /* Responses from CHUNKING commands go in buffer. Otherwise,
2903 there has not been a response. */
2904
d093f8e5 2905 sx.buffer[0] = 0;
e027f545 2906
0756eb3c 2907 sigalrm_seen = FALSE;
d093f8e5 2908 transport_write_timeout = sx.ob->data_timeout;
0756eb3c
PH
2909 smtp_command = US"sending data block"; /* For error messages */
2910 DEBUG(D_transport|D_v)
d093f8e5 2911 if (sx.peer_offered & PEER_OFFERED_CHUNKING)
6d5c916c
JH
2912 debug_printf(" will write message using CHUNKING\n");
2913 else
2914 debug_printf(" SMTP>> writing message and terminating \".\"\n");
0756eb3c 2915 transport_count = 0;
a7538db1 2916
80a47a2c 2917#ifndef DISABLE_DKIM
42055a33 2918 sx.ok = dkim_transport_write_message(&tctx, &sx.ob->dkim, CUSS &message);
4cd12fe9 2919#else
42055a33 2920 sx.ok = transport_write_message(&tctx, 0);
4cd12fe9 2921#endif
0756eb3c
PH
2922
2923 /* transport_write_message() uses write() because it is called from other
2924 places to write to non-sockets. This means that under some OS (e.g. Solaris)
2925 it can exit with "Broken pipe" as its error. This really means that the
2926 socket got closed at the far end. */
2927
2928 transport_write_timeout = 0; /* for subsequent transports */
2929
2930 /* Failure can either be some kind of I/O disaster (including timeout),
e027f545
JH
2931 or the failure of a transport filter or the expansion of added headers.
2932 Or, when CHUNKING, it can be a protocol-detected failure. */
0756eb3c 2933
d093f8e5 2934 if (!sx.ok)
b9df1829
JH
2935 if (message) goto SEND_FAILED;
2936 else goto RESPONSE_FAILED;
0756eb3c
PH
2937
2938 /* We used to send the terminating "." explicitly here, but because of
2939 buffering effects at both ends of TCP/IP connections, you don't gain
2940 anything by keeping it separate, so it might as well go in the final
2941 data buffer for efficiency. This is now done by setting the topt_end_dot
2942 flag above. */
2943
2944 smtp_command = US"end of data";
2945
e9166683 2946 if (sx.peer_offered & PEER_OFFERED_CHUNKING && sx.cmd_count > 1)
6d5c916c
JH
2947 {
2948 /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */
e9166683 2949 switch(sync_responses(&sx, sx.cmd_count-1, 0))
6d5c916c 2950 {
d093f8e5 2951 case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */
d9c3c8ed 2952 case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */
6d5c916c
JH
2953 break;
2954
d093f8e5 2955 case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
d9c3c8ed 2956 if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */
6d5c916c
JH
2957 case 0: break; /* No 2xx or 5xx, but no probs */
2958
2959 case -1: goto END_OFF; /* Timeout on RCPT */
2960 default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */
2961 }
2962 }
2963
8ccd00b1 2964#ifndef DISABLE_PRDR
fd98a5c6
JH
2965 /* For PRDR we optionally get a partial-responses warning
2966 * followed by the individual responses, before going on with
2967 * the overall response. If we don't get the warning then deal
2968 * with per non-PRDR. */
d093f8e5 2969 if(sx.prdr_active)
fd98a5c6 2970 {
d093f8e5
JH
2971 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3',
2972 sx.ob->final_timeout);
2973 if (!sx.ok && errno == 0) switch(sx.buffer[0])
e027f545 2974 {
d093f8e5
JH
2975 case '2': sx.prdr_active = FALSE;
2976 sx.ok = TRUE;
e027f545
JH
2977 break;
2978 case '4': errno = ERRNO_DATA4XX;
2979 addrlist->more_errno |=
d093f8e5 2980 ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
e027f545
JH
2981 break;
2982 }
fd98a5c6
JH
2983 }
2984 else
2985#endif
2986
2987 /* For non-PRDR SMTP, we now read a single response that applies to the
2988 whole message. If it is OK, then all the addresses have been delivered. */
0756eb3c 2989
d093f8e5 2990 if (!sx.lmtp)
e97957bc 2991 {
d093f8e5
JH
2992 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
2993 sx.ob->final_timeout);
2994 if (!sx.ok && errno == 0 && sx.buffer[0] == '4')
e97957bc
PH
2995 {
2996 errno = ERRNO_DATA4XX;
d093f8e5 2997 addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
e97957bc
PH
2998 }
2999 }
0756eb3c
PH
3000
3001 /* For LMTP, we get back a response for every RCPT command that we sent;
3002 some may be accepted and some rejected. For those that get a response, their
3003 status is fixed; any that are accepted have been handed over, even if later
3004 responses crash - at least, that's how I read RFC 2033.
3005
3006 If all went well, mark the recipient addresses as completed, record which
3007 host/IPaddress they were delivered to, and cut out RSET when sending another
3008 message down the same channel. Write the completed addresses to the journal
3009 now so that they are recorded in case there is a crash of hardware or
3010 software before the spool gets updated. Also record the final SMTP
3011 confirmation if needed (for SMTP only). */
3012
d093f8e5 3013 if (sx.ok)
0756eb3c
PH
3014 {
3015 int flag = '=';
3016 int delivery_time = (int)(time(NULL) - start_delivery_time);
3017 int len;
0756eb3c 3018 uschar *conf = NULL;
0d9fa8c0 3019
d093f8e5 3020 sx.send_rset = FALSE;
0d9fa8c0 3021 pipelining_active = FALSE;
0756eb3c 3022
0756eb3c
PH
3023 /* Set up confirmation if needed - applies only to SMTP */
3024
d68218c7 3025 if (
0cbf2b82 3026#ifdef DISABLE_EVENT
6c6d6e48 3027 LOGGING(smtp_confirmation) &&
a7538db1 3028#endif
d093f8e5 3029 !sx.lmtp
d68218c7 3030 )
0756eb3c 3031 {
d093f8e5 3032 const uschar *s = string_printing(sx.buffer);
55414b25 3033 /* deconst cast ok here as string_printing was checked to have alloc'n'copied */
d093f8e5 3034 conf = (s == sx.buffer)? (uschar *)string_copy(s) : US s;
0756eb3c
PH
3035 }
3036
fd98a5c6 3037 /* Process all transported addresses - for LMTP or PRDR, read a status for
0756eb3c
PH
3038 each one. */
3039
d9c3c8ed 3040 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
0756eb3c
PH
3041 {
3042 if (addr->transport_return != PENDING_OK) continue;
3043
3044 /* LMTP - if the response fails badly (e.g. timeout), use it for all the
3045 remaining addresses. Otherwise, it's a return code for just the one
75def545
PH
3046 address. For temporary errors, add a retry item for the address so that
3047 it doesn't get tried again too soon. */
0756eb3c 3048
8ccd00b1 3049#ifndef DISABLE_PRDR
d093f8e5 3050 if (sx.lmtp || sx.prdr_active)
fd98a5c6 3051#else
d093f8e5 3052 if (sx.lmtp)
fd98a5c6 3053#endif
0756eb3c 3054 {
d093f8e5
JH
3055 if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
3056 sx.ob->final_timeout))
0756eb3c 3057 {
d093f8e5 3058 if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED;
fd98a5c6 3059 addr->message = string_sprintf(
8ccd00b1 3060#ifndef DISABLE_PRDR
d093f8e5 3061 "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP",
fd98a5c6
JH
3062#else
3063 "LMTP error after %s: %s",
3064#endif
d093f8e5 3065 data_command, string_printing(sx.buffer));
75def545 3066 setflag(addr, af_pass_message); /* Allow message to go to user */
d093f8e5 3067 if (sx.buffer[0] == '5')
75def545
PH
3068 addr->transport_return = FAIL;
3069 else
3070 {
e97957bc 3071 errno = ERRNO_DATA4XX;
d093f8e5 3072 addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
75def545 3073 addr->transport_return = DEFER;
8ccd00b1 3074#ifndef DISABLE_PRDR
d093f8e5 3075 if (!sx.prdr_active)
fd98a5c6
JH
3076#endif
3077 retry_add_item(addr, addr->address_retry_key, 0);
75def545 3078 }
0756eb3c
PH
3079 continue;
3080 }
d9c3c8ed 3081 sx.completed_addr = TRUE; /* NOW we can set this flag */
6c6d6e48 3082 if (LOGGING(smtp_confirmation))
c0ea85ab 3083 {
d093f8e5 3084 const uschar *s = string_printing(sx.buffer);
55414b25 3085 /* deconst cast ok here as string_printing was checked to have alloc'n'copied */
d093f8e5 3086 conf = (s == sx.buffer) ? US string_copy(s) : US s;
c0ea85ab 3087 }
0756eb3c
PH
3088 }
3089
3090 /* SMTP, or success return from LMTP for this address. Pass back the
2d280592 3091 actual host that was used. */
0756eb3c
PH
3092
3093 addr->transport_return = OK;
3094 addr->more_errno = delivery_time;
d427a7f9 3095 addr->host_used = host;
0756eb3c
PH
3096 addr->special_action = flag;
3097 addr->message = conf;
8ccd00b1 3098#ifndef DISABLE_PRDR
d093f8e5 3099 if (sx.prdr_active) addr->flags |= af_prdr_used;
fd98a5c6 3100#endif
d093f8e5 3101 if (sx.peer_offered & PEER_OFFERED_CHUNKING) addr->flags |= af_chunking_used;
0756eb3c
PH
3102 flag = '-';
3103
8ccd00b1 3104#ifndef DISABLE_PRDR
d093f8e5 3105 if (!sx.prdr_active)
fd98a5c6
JH
3106#endif
3107 {
3108 /* Update the journal. For homonymic addresses, use the base address plus
3109 the transport name. See lots of comments in deliver.c about the reasons
3110 for the complications when homonyms are involved. Just carry on after
3111 write error, as it may prove possible to update the spool file later. */
4d8d62b9 3112
fd98a5c6 3113 if (testflag(addr, af_homonym))
d093f8e5 3114 sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
fd98a5c6 3115 else
d093f8e5 3116 sprintf(CS sx.buffer, "%.500s\n", addr->unique);
4d8d62b9 3117
57cc2785 3118 DEBUG(D_deliver) debug_printf("S:journalling %s\n", sx.buffer);
d093f8e5
JH
3119 len = Ustrlen(CS sx.buffer);
3120 if (write(journal_fd, sx.buffer, len) != len)
fd98a5c6 3121 log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
d093f8e5 3122 "%s: %s", sx.buffer, strerror(errno));
fd98a5c6 3123 }
0756eb3c
PH
3124 }
3125
8ccd00b1 3126#ifndef DISABLE_PRDR
d093f8e5 3127 if (sx.prdr_active)
fd98a5c6
JH
3128 {
3129 /* PRDR - get the final, overall response. For any non-success
3130 upgrade all the address statuses. */
d093f8e5
JH
3131 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
3132 sx.ob->final_timeout);
3133 if (!sx.ok)
fd98a5c6 3134 {
d093f8e5 3135 if(errno == 0 && sx.buffer[0] == '4')
fd98a5c6
JH
3136 {
3137 errno = ERRNO_DATA4XX;
d093f8e5 3138 addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
fd98a5c6 3139 }
d9c3c8ed 3140 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
d093f8e5 3141 if (sx.buffer[0] == '5' || addr->transport_return == OK)
fd98a5c6
JH
3142 addr->transport_return = PENDING_OK; /* allow set_errno action */
3143 goto RESPONSE_FAILED;
3144 }
3145
3146 /* Update the journal, or setup retry. */
d9c3c8ed 3147 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
fd98a5c6 3148 if (addr->transport_return == OK)
9be4572b
JH
3149 {
3150 if (testflag(addr, af_homonym))
3151 sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
3152 else
3153 sprintf(CS sx.buffer, "%.500s\n", addr->unique);
3154
3155 DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer);
3156 len = Ustrlen(CS sx.buffer);
3157 if (write(journal_fd, sx.buffer, len) != len)
3158 log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
3159 "%s: %s", sx.buffer, strerror(errno));
3160 }
3161 else if (addr->transport_return == DEFER)
3162 retry_add_item(addr, addr->address_retry_key, -2);
fd98a5c6
JH
3163 }
3164#endif
3165
0756eb3c
PH
3166 /* Ensure the journal file is pushed out to disk. */
3167
54fc8428 3168 if (EXIMfsync(journal_fd) < 0)
0756eb3c
PH
3169 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
3170 strerror(errno));
3171 }
3172 }
3173
3174
3175/* Handle general (not specific to one address) failures here. The value of ok
3176is used to skip over this code on the falling through case. A timeout causes a
3177deferral. Other errors may defer or fail according to the response code, and
3178may set up a special errno value, e.g. after connection chopped, which is
3179assumed if errno == 0 and there is no text in the buffer. If control reaches
3180here during the setting up phase (i.e. before MAIL FROM) then always defer, as
3181the problem is not related to this specific message. */
3182
d093f8e5 3183if (!sx.ok)
0756eb3c 3184 {
895fbaf2
JH
3185 int code, set_rc;
3186 uschar * set_message;
0756eb3c
PH
3187
3188 RESPONSE_FAILED:
895fbaf2
JH
3189 {
3190 save_errno = errno;
3191 message = NULL;
d093f8e5
JH
3192 sx.send_quit = check_response(host, &save_errno, addrlist->more_errno,
3193 sx.buffer, &code, &message, &pass_message);
895fbaf2
JH
3194 goto FAILED;
3195 }
0756eb3c
PH
3196
3197 SEND_FAILED:
895fbaf2
JH
3198 {
3199 save_errno = errno;
3200 code = '4';
b9df1829 3201 message = string_sprintf("send() to %s [%s] failed: %s",
c0ad8edf 3202 host->name, host->address, message ? message : US strerror(save_errno));
d093f8e5 3203 sx.send_quit = FALSE;
895fbaf2
JH
3204 goto FAILED;
3205 }
0756eb3c 3206
0756eb3c 3207 FAILED:
9be4572b
JH
3208 {
3209 BOOL message_error;
0756eb3c 3210
9be4572b
JH
3211 sx.ok = FALSE; /* For when reached by GOTO */
3212 set_message = message;
0756eb3c 3213
e97957bc 3214 /* We want to handle timeouts after MAIL or "." and loss of connection after
0756eb3c 3215 "." specially. They can indicate a problem with the sender address or with
e97957bc
PH
3216 the contents of the message rather than a real error on the connection. These
3217 cases are treated in the same way as a 4xx response. This next bit of code
3218 does the classification. */
0756eb3c 3219
e97957bc
PH
3220 switch(save_errno)
3221 {
3222 case 0:
3223 case ERRNO_MAIL4XX:
3224 case ERRNO_DATA4XX:
250b6871
JH
3225 message_error = TRUE;
3226 break;
0756eb3c 3227
e97957bc 3228 case ETIMEDOUT: