Do not rely on linker identifying common strings
[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
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189
190#ifdef MACRO_PREDEF
191
192/* Dummy values */
193smtp_transport_options_block smtp_transport_option_defaults = {0};
194void smtp_transport_init(transport_instance *tblock) {}
195BOOL smtp_transport_entry(transport_instance *tblock, address_item *addr) {return FALSE;}
196void smtp_transport_closedown(transport_instance *tblock) {}
197
198#else /*!MACRO_PREDEF*/
199
200
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201/* Default private options block for the smtp transport. */
202
203smtp_transport_options_block smtp_transport_option_defaults = {
204 NULL, /* hosts */
205 NULL, /* fallback_hosts */
206 NULL, /* hostlist */
207 NULL, /* fallback_hostlist */
208 NULL, /* authenticated_sender */
209 US"$primary_hostname", /* helo_data */
210 NULL, /* interface */
211 NULL, /* port */
212 US"smtp", /* protocol */
9e4f5962 213 NULL, /* DSCP */
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214 NULL, /* serialize_hosts */
215 NULL, /* hosts_try_auth */
216 NULL, /* hosts_require_auth */
f98442df 217 US"*", /* hosts_try_chunking */
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218#ifdef EXPERIMENTAL_DANE
219 NULL, /* hosts_try_dane */
7a31d643 220 NULL, /* hosts_require_dane */
96e47838 221#endif
fb05276a 222 NULL, /* hosts_try_fastopen */
8ccd00b1 223#ifndef DISABLE_PRDR
f98442df 224 US"*", /* hosts_try_prdr */
fd98a5c6 225#endif
f2de3a33 226#ifndef DISABLE_OCSP
0e66b3b6 227 US"*", /* hosts_request_ocsp (except under DANE; tls_client_start()) */
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228 NULL, /* hosts_require_ocsp */
229#endif
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230 NULL, /* hosts_require_tls */
231 NULL, /* hosts_avoid_tls */
6c9ed72e 232 NULL, /* hosts_verify_avoid_tls */
c51b8e75 233 NULL, /* hosts_avoid_pipelining */
0756eb3c 234 NULL, /* hosts_avoid_esmtp */
57cc2785 235#ifdef SUPPORT_TLS
0756eb3c 236 NULL, /* hosts_nopass_tls */
875512a3 237 US"*", /* hosts_noproxy_tls */
57cc2785 238#endif
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239 5*60, /* command_timeout */
240 5*60, /* connect_timeout; shorter system default overrides */
241 5*60, /* data timeout */
242 10*60, /* final timeout */
243 1024, /* size_addition */
244 5, /* hosts_max_try */
8e669ac1 245 50, /* hosts_max_try_hardlimit */
48c7f9e2 246 TRUE, /* address_retry_include_sender */
0756eb3c 247 FALSE, /* allow_localhost */
382afc6b 248 FALSE, /* authenticated_sender_force */
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249 FALSE, /* gethostbyname */
250 TRUE, /* dns_qualify_single */
251 FALSE, /* dns_search_parents */
0539a19d 252 { NULL, NULL }, /* dnssec_domains {request,require} */
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253 TRUE, /* delay_after_cutoff */
254 FALSE, /* hosts_override */
255 FALSE, /* hosts_randomize */
256 TRUE, /* keepalive */
f1513293 257 FALSE, /* lmtp_ignore_quota */
9c695f6d 258 NULL, /* expand_retry_include_ip_address */
0756eb3c 259 TRUE /* retry_include_ip_address */
f0989ec0 260#ifdef SUPPORT_SOCKS
7eb6c37c 261 ,NULL /* socks_proxy */
b8bf753b 262#endif
80a47a2c 263#ifdef SUPPORT_TLS
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264 ,NULL, /* tls_certificate */
265 NULL, /* tls_crl */
266 NULL, /* tls_privatekey */
267 NULL, /* tls_require_ciphers */
54c90be1 268 NULL, /* tls_sni */
0e0f3f56 269 US"system", /* tls_verify_certificates */
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270 EXIM_CLIENT_DH_DEFAULT_MIN_BITS,
271 /* tls_dh_min_bits */
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272 TRUE, /* tls_tempfail_tryclear */
273 NULL, /* tls_verify_hosts */
610ff438 274 US"*", /* tls_try_verify_hosts */
01a4a5c5 275 US"*" /* tls_verify_cert_hostnames */
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276#endif
277#ifndef DISABLE_DKIM
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278 , {NULL, /* dkim_canon */
279 NULL, /* dkim_domain */
280 NULL, /* dkim_private_key */
281 NULL, /* dkim_selector */
282 NULL, /* dkim_sign_headers */
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283 NULL, /* dkim_strict */
284 FALSE} /* dot_stuffed */
80a47a2c 285#endif
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286};
287
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288/* some DSN flags for use later */
289
290static int rf_list[] = {rf_notify_never, rf_notify_success,
291 rf_notify_failure, rf_notify_delay };
292
45500060 293static uschar *rf_names[] = { US"NEVER", US"SUCCESS", US"FAILURE", US"DELAY" };
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294
295
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296
297/* Local statics */
298
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299static uschar *smtp_command; /* Points to last cmd for error messages */
300static uschar *mail_command; /* Points to MAIL cmd for error messages */
301static uschar *data_command = US""; /* Points to DATA cmd for error messages */
302static BOOL update_waiting; /* TRUE to update the "wait" database */
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303
304/*XXX move to smtp_context */
87cb4a16 305static BOOL pipelining_active; /* current transaction is in pipe mode */
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306
307
308/*************************************************
309* Setup entry point *
310*************************************************/
311
312/* This function is called when the transport is about to be used,
313but before running it in a sub-process. It is used for two things:
314
315 (1) To set the fallback host list in addresses, when delivering.
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316 (2) To pass back the interface, port, protocol, and other options, for use
317 during callout verification.
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318
319Arguments:
320 tblock pointer to the transport instance block
321 addrlist list of addresses about to be transported
322 tf if not NULL, pointer to block in which to return options
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323 uid the uid that will be set (not used)
324 gid the gid that will be set (not used)
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325 errmsg place for error message (not used)
326
327Returns: OK always (FAIL, DEFER not used)
328*/
329
330static int
331smtp_transport_setup(transport_instance *tblock, address_item *addrlist,
929ba01c 332 transport_feedback *tf, uid_t uid, gid_t gid, uschar **errmsg)
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333{
334smtp_transport_options_block *ob =
335 (smtp_transport_options_block *)(tblock->options_block);
336
337errmsg = errmsg; /* Keep picky compilers happy */
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338uid = uid;
339gid = gid;
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340
341/* Pass back options if required. This interface is getting very messy. */
342
02b41d71 343if (tf)
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344 {
345 tf->interface = ob->interface;
346 tf->port = ob->port;
347 tf->protocol = ob->protocol;
348 tf->hosts = ob->hosts;
349 tf->hosts_override = ob->hosts_override;
350 tf->hosts_randomize = ob->hosts_randomize;
351 tf->gethostbyname = ob->gethostbyname;
352 tf->qualify_single = ob->dns_qualify_single;
353 tf->search_parents = ob->dns_search_parents;
26da7e20 354 tf->helo_data = ob->helo_data;
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355 }
356
357/* Set the fallback host list for all the addresses that don't have fallback
358host lists, provided that the local host wasn't present in the original host
359list. */
360
361if (!testflag(addrlist, af_local_host_removed))
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362 for (; addrlist; addrlist = addrlist->next)
363 if (!addrlist->fallback_hosts) addrlist->fallback_hosts = ob->fallback_hostlist;
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364
365return OK;
366}
367
368
369
370/*************************************************
371* Initialization entry point *
372*************************************************/
373
374/* Called for each instance, after its options have been read, to
375enable consistency checks to be done, or anything else that needs
376to be set up.
377
378Argument: pointer to the transport instance block
379Returns: nothing
380*/
381
382void
383smtp_transport_init(transport_instance *tblock)
384{
385smtp_transport_options_block *ob =
386 (smtp_transport_options_block *)(tblock->options_block);
387
388/* Retry_use_local_part defaults FALSE if unset */
389
390if (tblock->retry_use_local_part == TRUE_UNSET)
391 tblock->retry_use_local_part = FALSE;
392
393/* Set the default port according to the protocol */
394
395if (ob->port == NULL)
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396 ob->port = (strcmpic(ob->protocol, US"lmtp") == 0)? US"lmtp" :
397 (strcmpic(ob->protocol, US"smtps") == 0)? US"smtps" : US"smtp";
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398
399/* Set up the setup entry point, to be called before subprocesses for this
400transport. */
401
402tblock->setup = smtp_transport_setup;
403
404/* Complain if any of the timeouts are zero. */
405
406if (ob->command_timeout <= 0 || ob->data_timeout <= 0 ||
407 ob->final_timeout <= 0)
408 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
409 "command, data, or final timeout value is zero for %s transport",
410 tblock->name);
411
412/* If hosts_override is set and there are local hosts, set the global
413flag that stops verify from showing router hosts. */
414
415if (ob->hosts_override && ob->hosts != NULL) tblock->overrides_hosts = TRUE;
416
417/* If there are any fallback hosts listed, build a chain of host items
418for them, but do not do any lookups at this time. */
419
420host_build_hostlist(&(ob->fallback_hostlist), ob->fallback_hosts, FALSE);
421}
422
423
424
425
426
427/*************************************************
428* Set delivery info into all active addresses *
429*************************************************/
430
431/* Only addresses whose status is >= PENDING are relevant. A lesser
432status means that an address is not currently being processed.
433
434Arguments:
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435 addrlist points to a chain of addresses
436 errno_value to put in each address's errno field
437 msg to put in each address's message field
438 rc to put in each address's transport_return field
439 pass_message if TRUE, set the "pass message" flag in the address
c562fd30 440 host if set, mark addrs as having used this host
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441 smtp_greeting from peer
442 helo_response from peer
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443
444If errno_value has the special value ERRNO_CONNECTTIMEOUT, ETIMEDOUT is put in
445the errno field, and RTEF_CTOUT is ORed into the more_errno field, to indicate
446this particular type of timeout.
447
448Returns: nothing
449*/
450
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451static void
452set_errno(address_item *addrlist, int errno_value, uschar *msg, int rc,
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453 BOOL pass_message, host_item * host
454#ifdef EXPERIMENTAL_DSN_INFO
455 , const uschar * smtp_greeting, const uschar * helo_response
456#endif
457 )
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458{
459address_item *addr;
460int orvalue = 0;
461if (errno_value == ERRNO_CONNECTTIMEOUT)
462 {
463 errno_value = ETIMEDOUT;
464 orvalue = RTEF_CTOUT;
465 }
895fbaf2 466for (addr = addrlist; addr; addr = addr->next)
168dec3b 467 if (addr->transport_return >= PENDING)
447d236c 468 {
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469 addr->basic_errno = errno_value;
470 addr->more_errno |= orvalue;
02b41d71 471 if (msg)
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472 {
473 addr->message = msg;
474 if (pass_message) setflag(addr, af_pass_message);
475 }
476 addr->transport_return = rc;
477 if (host)
895fbaf2 478 {
168dec3b 479 addr->host_used = host;
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480#ifdef EXPERIMENTAL_DSN_INFO
481 if (smtp_greeting)
482 {uschar * s = Ustrchr(smtp_greeting, '\n'); if (s) *s = '\0';}
483 addr->smtp_greeting = smtp_greeting;
484
485 if (helo_response)
486 {uschar * s = Ustrchr(helo_response, '\n'); if (s) *s = '\0';}
487 addr->helo_response = helo_response;
488#endif
489 }
447d236c 490 }
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491}
492
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493static void
494set_errno_nohost(address_item *addrlist, int errno_value, uschar *msg, int rc,
495 BOOL pass_message)
496{
497set_errno(addrlist, errno_value, msg, rc, pass_message, NULL
498#ifdef EXPERIMENTAL_DSN_INFO
499 , NULL, NULL
500#endif
501 );
502}
0756eb3c
PH
503
504
505/*************************************************
506* Check an SMTP response *
507*************************************************/
508
509/* This function is given an errno code and the SMTP response buffer
510to analyse, together with the host identification for generating messages. It
511sets an appropriate message and puts the first digit of the response code into
512the yield variable. If no response was actually read, a suitable digit is
513chosen.
514
515Arguments:
447d236c
PH
516 host the current host, to get its name for messages
517 errno_value pointer to the errno value
518 more_errno from the top address for use with ERRNO_FILTER_FAIL
519 buffer the SMTP response buffer
520 yield where to put a one-digit SMTP response code
4c04137d 521 message where to put an error message
447d236c
PH
522 pass_message set TRUE if message is an SMTP response
523
524Returns: TRUE if an SMTP "QUIT" command should be sent, else FALSE
0756eb3c
PH
525*/
526
a7538db1
JH
527static BOOL
528check_response(host_item *host, int *errno_value, int more_errno,
447d236c 529 uschar *buffer, int *yield, uschar **message, BOOL *pass_message)
0756eb3c 530{
0d9fa8c0 531uschar * pl = pipelining_active ? US"pipelined " : US"";
e9166683 532const uschar * s;
0756eb3c
PH
533
534*yield = '4'; /* Default setting is to give a temporary error */
535
e9166683 536switch(*errno_value)
0756eb3c 537 {
e9166683
JH
538 case ETIMEDOUT: /* Handle response timeout */
539 *message = US string_sprintf("SMTP timeout after %s%s",
540 pl, smtp_command);
541 if (transport_count > 0)
542 *message = US string_sprintf("%s (%d bytes written)", *message,
543 transport_count);
544 return FALSE;
545
546 case ERRNO_SMTPFORMAT: /* Handle malformed SMTP response */
547 s = string_printing(buffer);
548 while (isspace(*s)) s++;
549 *message = *s == 0
550 ? string_sprintf("Malformed SMTP reply (an empty line) "
551 "in response to %s%s", pl, smtp_command)
552 : string_sprintf("Malformed SMTP reply in response to %s%s: %s",
553 pl, smtp_command, s);
554 return FALSE;
555
556 case ERRNO_FILTER_FAIL: /* Handle a failed filter process error;
557 can't send QUIT as we mustn't end the DATA. */
558 *message = string_sprintf("transport filter process failed (%d)%s",
559 more_errno,
560 more_errno == EX_EXECFAILED ? ": unable to execute command" : "");
561 return FALSE;
562
563 case ERRNO_CHHEADER_FAIL: /* Handle a failed add_headers expansion;
564 can't send QUIT as we mustn't end the DATA. */
565 *message =
566 string_sprintf("failed to expand headers_add or headers_remove: %s",
567 expand_string_message);
568 return FALSE;
569
570 case ERRNO_WRITEINCOMPLETE: /* failure to write a complete data block */
571 *message = string_sprintf("failed to write a data block");
572 return FALSE;
0756eb3c 573
8c5d388a 574#ifdef SUPPORT_I18N
e9166683
JH
575 case ERRNO_UTF8_FWD: /* no advertised SMTPUTF8, for international message */
576 *message = US"utf8 support required but not offered for forwarding";
577 DEBUG(D_deliver|D_transport) debug_printf("%s\n", *message);
578 return TRUE;
250b6871 579#endif
e9166683 580 }
250b6871 581
0756eb3c
PH
582/* Handle error responses from the remote mailer. */
583
584if (buffer[0] != 0)
585 {
e9166683
JH
586 *message = string_sprintf("SMTP error from remote mail server after %s%s: "
587 "%s", pl, smtp_command, s = string_printing(buffer));
447d236c 588 *pass_message = TRUE;
0756eb3c
PH
589 *yield = buffer[0];
590 return TRUE;
591 }
592
593/* No data was read. If there is no errno, this must be the EOF (i.e.
19b9dc85
PH
594connection closed) case, which causes deferral. An explicit connection reset
595error has the same effect. Otherwise, put the host's identity in the message,
596leaving the errno value to be interpreted as well. In all cases, we have to
597assume the connection is now dead. */
0756eb3c 598
19b9dc85 599if (*errno_value == 0 || *errno_value == ECONNRESET)
0756eb3c
PH
600 {
601 *errno_value = ERRNO_SMTPCLOSED;
c562fd30 602 *message = US string_sprintf("Remote host closed connection "
02b41d71 603 "in response to %s%s", pl, smtp_command);
0756eb3c 604 }
de6273b4
JH
605else
606 *message = US string_sprintf("%s [%s]", host->name, host->address);
0756eb3c
PH
607
608return FALSE;
609}
610
611
612
613/*************************************************
614* Write error message to logs *
615*************************************************/
616
617/* This writes to the main log and to the message log.
618
619Arguments:
620 addr the address item containing error information
621 host the current host
622
623Returns: nothing
624*/
625
626static void
627write_logs(address_item *addr, host_item *host)
628{
584ddd64
JH
629uschar * message = LOGGING(outgoing_port)
630 ? string_sprintf("H=%s [%s]:%d", host->name, host->address,
631 host->port == PORT_NONE ? 25 : host->port)
632 : string_sprintf("H=%s [%s]", host->name, host->address);
c562fd30
JH
633
634if (addr->message)
0756eb3c 635 {
c562fd30 636 message = string_sprintf("%s: %s", message, addr->message);
0756eb3c
PH
637 if (addr->basic_errno > 0)
638 message = string_sprintf("%s: %s", message, strerror(addr->basic_errno));
639 log_write(0, LOG_MAIN, "%s", message);
640 deliver_msglog("%s %s\n", tod_stamp(tod_log), message);
641 }
642else
643 {
37f3dc43
JH
644 const uschar * s = exim_errstr(addr->basic_errno);
645 log_write(0, LOG_MAIN, "%s %s", message, s);
646 deliver_msglog("%s %s %s\n", tod_stamp(tod_log), message, s);
0756eb3c
PH
647 }
648}
649
c562fd30
JH
650static void
651msglog_line(host_item * host, uschar * message)
652{
37f3dc43
JH
653deliver_msglog("%s H=%s [%s] %s\n", tod_stamp(tod_log),
654 host->name, host->address, message);
c562fd30
JH
655}
656
0756eb3c
PH
657
658
0cbf2b82 659#ifndef DISABLE_EVENT
d68218c7
JH
660/*************************************************
661* Post-defer action *
662*************************************************/
663
664/* This expands an arbitrary per-transport string.
665 It might, for example, be used to write to the database log.
666
667Arguments:
d68218c7
JH
668 addr the address item containing error information
669 host the current host
670
671Returns: nothing
672*/
673
674static void
774ef2d7 675deferred_event_raise(address_item *addr, host_item *host)
d68218c7 676{
774ef2d7 677uschar * action = addr->transport->event_action;
55414b25 678const uschar * save_domain;
a7538db1
JH
679uschar * save_local;
680
d68218c7 681if (!action)
a7538db1 682 return;
d68218c7 683
a7538db1
JH
684save_domain = deliver_domain;
685save_local = deliver_localpart;
686
687/*XXX would ip & port already be set up? */
688deliver_host_address = string_copy(host->address);
774ef2d7
JH
689deliver_host_port = host->port == PORT_NONE ? 25 : host->port;
690event_defer_errno = addr->basic_errno;
d68218c7
JH
691
692router_name = addr->router->name;
693transport_name = addr->transport->name;
a7538db1
JH
694deliver_domain = addr->domain;
695deliver_localpart = addr->local_part;
696
774ef2d7 697(void) event_raise(action, US"msg:host:defer",
a7538db1
JH
698 addr->message
699 ? addr->basic_errno > 0
700 ? string_sprintf("%s: %s", addr->message, strerror(addr->basic_errno))
701 : string_copy(addr->message)
702 : addr->basic_errno > 0
703 ? string_copy(US strerror(addr->basic_errno))
704 : NULL);
705
706deliver_localpart = save_local;
707deliver_domain = save_domain;
d68218c7
JH
708router_name = transport_name = NULL;
709}
710#endif
711
0756eb3c
PH
712/*************************************************
713* Synchronize SMTP responses *
714*************************************************/
715
716/* This function is called from smtp_deliver() to receive SMTP responses from
717the server, and match them up with the commands to which they relate. When
718PIPELINING is not in use, this function is called after every command, and is
719therefore somewhat over-engineered, but it is simpler to use a single scheme
720that works both with and without PIPELINING instead of having two separate sets
721of code.
722
723The set of commands that are buffered up with pipelining may start with MAIL
724and may end with DATA; in between are RCPT commands that correspond to the
725addresses whose status is PENDING_DEFER. All other commands (STARTTLS, AUTH,
726etc.) are never buffered.
727
728Errors after MAIL or DATA abort the whole process leaving the response in the
729buffer. After MAIL, pending responses are flushed, and the original command is
730re-instated in big_buffer for error messages. For RCPT commands, the remote is
731permitted to reject some recipient addresses while accepting others. However
732certain errors clearly abort the whole process. Set the value in
733transport_return to PENDING_OK if the address is accepted. If there is a
734subsequent general error, it will get reset accordingly. If not, it will get
735converted to OK at the end.
736
737Arguments:
df5b41e3 738 sx smtp connection context
48c7f9e2 739 count the number of responses to read
48c7f9e2
PH
740 pending_DATA 0 if last command sent was not DATA
741 +1 if previously had a good recipient
742 -1 if not previously had a good recipient
0756eb3c
PH
743
744Returns: 3 if at least one address had 2xx and one had 5xx
745 2 if at least one address had 5xx but none had 2xx
746 1 if at least one host had a 2xx response, but none had 5xx
747 0 no address had 2xx or 5xx but no errors (all 4xx, or just DATA)
748 -1 timeout while reading RCPT response
749 -2 I/O or other non-response error for RCPT
750 -3 DATA or MAIL failed - errno and buffer set
751*/
752
753static int
df5b41e3 754sync_responses(smtp_context * sx, int count, int pending_DATA)
0756eb3c 755{
df5b41e3 756address_item *addr = sx->sync_addr;
e9166683
JH
757smtp_transport_options_block *ob =
758 (smtp_transport_options_block *)sx->tblock->options_block;
0756eb3c
PH
759int yield = 0;
760
761/* Handle the response for a MAIL command. On error, reinstate the original
762command in big_buffer for error message use, and flush any further pending
763responses before returning, except after I/O errors and timeouts. */
764
df5b41e3 765if (sx->pending_MAIL)
0756eb3c
PH
766 {
767 count--;
e9166683
JH
768 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
769 '2', ob->command_timeout))
0756eb3c 770 {
e027f545 771 DEBUG(D_transport) debug_printf("bad response for MAIL\n");
0756eb3c 772 Ustrcpy(big_buffer, mail_command); /* Fits, because it came from there! */
df5b41e3 773 if (errno == 0 && sx->buffer[0] != 0)
0756eb3c
PH
774 {
775 uschar flushbuffer[4096];
e97957bc 776 int save_errno = 0;
df5b41e3 777 if (sx->buffer[0] == '4')
e97957bc
PH
778 {
779 save_errno = ERRNO_MAIL4XX;
df5b41e3 780 addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
e97957bc 781 }
0756eb3c
PH
782 while (count-- > 0)
783 {
df5b41e3 784 if (!smtp_read_response(&sx->inblock, flushbuffer, sizeof(flushbuffer),
e9166683 785 '2', ob->command_timeout)
0756eb3c
PH
786 && (errno != 0 || flushbuffer[0] == 0))
787 break;
788 }
e97957bc 789 errno = save_errno;
0756eb3c 790 }
c562fd30
JH
791
792 if (pending_DATA) count--; /* Number of RCPT responses to come */
793 while (count-- > 0) /* Mark any pending addrs with the host used */
794 {
795 while (addr->transport_return != PENDING_DEFER) addr = addr->next;
df5b41e3 796 addr->host_used = sx->host;
c562fd30
JH
797 addr = addr->next;
798 }
0756eb3c
PH
799 return -3;
800 }
801 }
802
803if (pending_DATA) count--; /* Number of RCPT responses to come */
804
805/* Read and handle the required number of RCPT responses, matching each one up
806with an address by scanning for the next address whose status is PENDING_DEFER.
807*/
808
809while (count-- > 0)
810 {
4c2471ca
JH
811 while (addr->transport_return != PENDING_DEFER)
812 if (!(addr = addr->next))
813 return -2;
0756eb3c
PH
814
815 /* The address was accepted */
df5b41e3 816 addr->host_used = sx->host;
0756eb3c 817
e9166683
JH
818 if (smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
819 '2', ob->command_timeout))
0756eb3c
PH
820 {
821 yield |= 1;
822 addr->transport_return = PENDING_OK;
823
824 /* If af_dr_retry_exists is set, there was a routing delay on this address;
09945f1e
PH
825 ensure that any address-specific retry record is expunged. We do this both
826 for the basic key and for the version that also includes the sender. */
0756eb3c
PH
827
828 if (testflag(addr, af_dr_retry_exists))
09945f1e
PH
829 {
830 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
831 sender_address);
832 retry_add_item(addr, altkey, rf_delete);
0756eb3c 833 retry_add_item(addr, addr->address_retry_key, rf_delete);
09945f1e 834 }
0756eb3c
PH
835 }
836
837 /* Timeout while reading the response */
838
839 else if (errno == ETIMEDOUT)
840 {
c562fd30 841 uschar *message = string_sprintf("SMTP timeout after RCPT TO:<%s>",
e9166683 842 transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes));
df5b41e3 843 set_errno_nohost(sx->first_addr, ETIMEDOUT, message, DEFER, FALSE);
0756eb3c 844 retry_add_item(addr, addr->address_retry_key, 0);
f6c332bd 845 update_waiting = FALSE;
0756eb3c
PH
846 return -1;
847 }
848
849 /* Handle other errors in obtaining an SMTP response by returning -1. This
850 will cause all the addresses to be deferred. Restore the SMTP command in
851 big_buffer for which we are checking the response, so the error message
852 makes sense. */
853
df5b41e3 854 else if (errno != 0 || sx->buffer[0] == 0)
0756eb3c
PH
855 {
856 string_format(big_buffer, big_buffer_size, "RCPT TO:<%s>",
df5b41e3 857 transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes));
0756eb3c
PH
858 return -2;
859 }
860
861 /* Handle SMTP permanent and temporary response codes. */
862
863 else
864 {
865 addr->message =
447d236c 866 string_sprintf("SMTP error from remote mail server after RCPT TO:<%s>: "
df5b41e3
JH
867 "%s", transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes),
868 string_printing(sx->buffer));
447d236c 869 setflag(addr, af_pass_message);
e9166683
JH
870 if (!sx->verify)
871 msglog_line(sx->host, addr->message);
0756eb3c
PH
872
873 /* The response was 5xx */
874
df5b41e3 875 if (sx->buffer[0] == '5')
0756eb3c
PH
876 {
877 addr->transport_return = FAIL;
878 yield |= 2;
879 }
880
881 /* The response was 4xx */
882
883 else
884 {
0756eb3c
PH
885 addr->transport_return = DEFER;
886 addr->basic_errno = ERRNO_RCPT4XX;
df5b41e3 887 addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
0756eb3c 888
e9166683
JH
889 if (!sx->verify)
890 {
0cbf2b82 891#ifndef DISABLE_EVENT
e9166683
JH
892 event_defer_errno = addr->more_errno;
893 msg_event_raise(US"msg:rcpt:host:defer", addr);
5ef5dd52
JB
894#endif
895
e9166683
JH
896 /* Log temporary errors if there are more hosts to be tried.
897 If not, log this last one in the == line. */
0756eb3c 898
e9166683
JH
899 if (sx->host->next)
900 log_write(0, LOG_MAIN, "H=%s [%s]: %s",
901 sx->host->name, sx->host->address, addr->message);
0756eb3c 902
0cbf2b82 903#ifndef DISABLE_EVENT
e9166683
JH
904 else
905 msg_event_raise(US"msg:rcpt:defer", addr);
5ef5dd52
JB
906#endif
907
e9166683
JH
908 /* Do not put this message on the list of those waiting for specific
909 hosts, as otherwise it is likely to be tried too often. */
0756eb3c 910
e9166683 911 update_waiting = FALSE;
0756eb3c 912
e9166683
JH
913 /* Add a retry item for the address so that it doesn't get tried again
914 too soon. If address_retry_include_sender is true, add the sender address
915 to the retry key. */
0756eb3c 916
e9166683
JH
917 retry_add_item(addr,
918 ob->address_retry_include_sender
919 ? string_sprintf("%s:<%s>", addr->address_retry_key, sender_address)
920 : addr->address_retry_key,
921 0);
922 }
0756eb3c
PH
923 }
924 }
925 } /* Loop for next RCPT response */
926
927/* Update where to start at for the next block of responses, unless we
928have already handled all the addresses. */
929
e9166683 930if (addr) sx->sync_addr = addr->next;
0756eb3c
PH
931
932/* Handle a response to DATA. If we have not had any good recipients, either
933previously or in this block, the response is ignored. */
934
935if (pending_DATA != 0 &&
e9166683
JH
936 !smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
937 '3', ob->command_timeout))
0756eb3c
PH
938 {
939 int code;
940 uschar *msg;
447d236c 941 BOOL pass_message;
e97957bc
PH
942 if (pending_DATA > 0 || (yield & 1) != 0)
943 {
df5b41e3 944 if (errno == 0 && sx->buffer[0] == '4')
e97957bc
PH
945 {
946 errno = ERRNO_DATA4XX;
df5b41e3 947 sx->first_addr->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
e97957bc
PH
948 }
949 return -3;
950 }
df5b41e3 951 (void)check_response(sx->host, &errno, 0, sx->buffer, &code, &msg, &pass_message);
0756eb3c
PH
952 DEBUG(D_transport) debug_printf("%s\nerror for DATA ignored: pipelining "
953 "is in use and there were no good recipients\n", msg);
954 }
955
956/* All responses read and handled; MAIL (if present) received 2xx and DATA (if
957present) received 3xx. If any RCPTs were handled and yielded anything other
958than 4xx, yield will be set non-zero. */
959
960return yield;
961}
962
963
964
fcc8e047
JH
965/* Do the client side of smtp-level authentication */
966/*
967Arguments:
968 buffer EHLO response from server (gets overwritten)
969 addrlist chain of potential addresses to deliver
970 host host to deliver to
971 ob transport options
972 ibp, obp comms channel control blocks
973
974Returns:
975 OK Success, or failed (but not required): global "smtp_authenticated" set
976 DEFER Failed authentication (and was required)
977 ERROR Internal problem
978
979 FAIL_SEND Failed communications - transmit
980 FAIL - response
981*/
982
983int
984smtp_auth(uschar *buffer, unsigned bufsize, address_item *addrlist, host_item *host,
985 smtp_transport_options_block *ob, BOOL is_esmtp,
986 smtp_inblock *ibp, smtp_outblock *obp)
987{
a7538db1
JH
988int require_auth;
989uschar *fail_reason = US"server did not advertise AUTH support";
fcc8e047 990
a7538db1
JH
991smtp_authenticated = FALSE;
992client_authenticator = client_authenticated_id = client_authenticated_sender = NULL;
5130845b 993require_auth = verify_check_given_host(&ob->hosts_require_auth, host);
fcc8e047 994
a7538db1
JH
995if (is_esmtp && !regex_AUTH) regex_AUTH =
996 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
997 FALSE, TRUE);
fcc8e047 998
a7538db1
JH
999if (is_esmtp && regex_match_and_setup(regex_AUTH, buffer, 0, -1))
1000 {
1001 uschar *names = string_copyn(expand_nstring[1], expand_nlength[1]);
1002 expand_nmax = -1; /* reset */
fcc8e047 1003
a7538db1
JH
1004 /* Must not do this check until after we have saved the result of the
1005 regex match above. */
fcc8e047 1006
a7538db1 1007 if (require_auth == OK ||
5130845b 1008 verify_check_given_host(&ob->hosts_try_auth, host) == OK)
a7538db1
JH
1009 {
1010 auth_instance *au;
1011 fail_reason = US"no common mechanisms were found";
fcc8e047 1012
a7538db1 1013 DEBUG(D_transport) debug_printf("scanning authentication mechanisms\n");
fcc8e047 1014
a7538db1
JH
1015 /* Scan the configured authenticators looking for one which is configured
1016 for use as a client, which is not suppressed by client_condition, and
1017 whose name matches an authentication mechanism supported by the server.
1018 If one is found, attempt to authenticate by calling its client function.
1019 */
fcc8e047 1020
a7538db1
JH
1021 for (au = auths; !smtp_authenticated && au != NULL; au = au->next)
1022 {
1023 uschar *p = names;
1024 if (!au->client ||
1025 (au->client_condition != NULL &&
1026 !expand_check_condition(au->client_condition, au->name,
1027 US"client authenticator")))
1028 {
1029 DEBUG(D_transport) debug_printf("skipping %s authenticator: %s\n",
1030 au->name,
1031 (au->client)? "client_condition is false" :
1032 "not configured as a client");
1033 continue;
1034 }
fcc8e047 1035
a7538db1 1036 /* Loop to scan supported server mechanisms */
fcc8e047 1037
a7538db1
JH
1038 while (*p != 0)
1039 {
1040 int rc;
1041 int len = Ustrlen(au->public_name);
1042 while (isspace(*p)) p++;
fcc8e047 1043
a7538db1
JH
1044 if (strncmpic(au->public_name, p, len) != 0 ||
1045 (p[len] != 0 && !isspace(p[len])))
1046 {
1047 while (*p != 0 && !isspace(*p)) p++;
1048 continue;
1049 }
fcc8e047 1050
a7538db1
JH
1051 /* Found data for a listed mechanism. Call its client entry. Set
1052 a flag in the outblock so that data is overwritten after sending so
1053 that reflections don't show it. */
fcc8e047 1054
a7538db1
JH
1055 fail_reason = US"authentication attempt(s) failed";
1056 obp->authenticating = TRUE;
1057 rc = (au->info->clientcode)(au, ibp, obp,
1058 ob->command_timeout, buffer, bufsize);
1059 obp->authenticating = FALSE;
1060 DEBUG(D_transport) debug_printf("%s authenticator yielded %d\n",
1061 au->name, rc);
fcc8e047 1062
a7538db1
JH
1063 /* A temporary authentication failure must hold up delivery to
1064 this host. After a permanent authentication failure, we carry on
1065 to try other authentication methods. If all fail hard, try to
1066 deliver the message unauthenticated unless require_auth was set. */
fcc8e047 1067
a7538db1
JH
1068 switch(rc)
1069 {
1070 case OK:
1071 smtp_authenticated = TRUE; /* stops the outer loop */
1072 client_authenticator = au->name;
1073 if (au->set_client_id != NULL)
1074 client_authenticated_id = expand_string(au->set_client_id);
1075 break;
1076
1077 /* Failure after writing a command */
1078
1079 case FAIL_SEND:
1080 return FAIL_SEND;
1081
1082 /* Failure after reading a response */
1083
1084 case FAIL:
1085 if (errno != 0 || buffer[0] != '5') return FAIL;
1086 log_write(0, LOG_MAIN, "%s authenticator failed H=%s [%s] %s",
1087 au->name, host->name, host->address, buffer);
1088 break;
1089
1090 /* Failure by some other means. In effect, the authenticator
1091 decided it wasn't prepared to handle this case. Typically this
1092 is the result of "fail" in an expansion string. Do we need to
1093 log anything here? Feb 2006: a message is now put in the buffer
1094 if logging is required. */
1095
1096 case CANCELLED:
1097 if (*buffer != 0)
1098 log_write(0, LOG_MAIN, "%s authenticator cancelled "
1099 "authentication H=%s [%s] %s", au->name, host->name,
1100 host->address, buffer);
1101 break;
1102
1103 /* Internal problem, message in buffer. */
1104
1105 case ERROR:
895fbaf2
JH
1106 set_errno_nohost(addrlist, ERRNO_AUTHPROB, string_copy(buffer),
1107 DEFER, FALSE);
a7538db1
JH
1108 return ERROR;
1109 }
fcc8e047 1110
a7538db1
JH
1111 break; /* If not authenticated, try next authenticator */
1112 } /* Loop for scanning supported server mechanisms */
1113 } /* Loop for further authenticators */
fcc8e047 1114 }
a7538db1 1115 }
fcc8e047 1116
a7538db1 1117/* If we haven't authenticated, but are required to, give up. */
fcc8e047 1118
a7538db1
JH
1119if (require_auth == OK && !smtp_authenticated)
1120 {
895fbaf2 1121 set_errno_nohost(addrlist, ERRNO_AUTHFAIL,
a7538db1 1122 string_sprintf("authentication required but %s", fail_reason), DEFER,
895fbaf2 1123 FALSE);
a7538db1
JH
1124 return DEFER;
1125 }
4d8d62b9 1126
a7538db1 1127return OK;
fcc8e047
JH
1128}
1129
1130
1131/* Construct AUTH appendix string for MAIL TO */
1132/*
1133Arguments
1134 buffer to build string
1135 addrlist chain of potential addresses to deliver
1136 ob transport options
1137
1138Globals smtp_authenticated
1139 client_authenticated_sender
1140Return True on error, otherwise buffer has (possibly empty) terminated string
1141*/
1142
1143BOOL
1144smtp_mail_auth_str(uschar *buffer, unsigned bufsize, address_item *addrlist,
1145 smtp_transport_options_block *ob)
1146{
1147uschar *local_authenticated_sender = authenticated_sender;
1148
1149#ifdef notdef
1150 debug_printf("smtp_mail_auth_str: as<%s> os<%s> SA<%s>\n", authenticated_sender, ob->authenticated_sender, smtp_authenticated?"Y":"N");
1151#endif
1152
1153if (ob->authenticated_sender != NULL)
1154 {
1155 uschar *new = expand_string(ob->authenticated_sender);
1156 if (new == NULL)
1157 {
1158 if (!expand_string_forcedfail)
1159 {
1160 uschar *message = string_sprintf("failed to expand "
1161 "authenticated_sender: %s", expand_string_message);
895fbaf2 1162 set_errno_nohost(addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
fcc8e047
JH
1163 return TRUE;
1164 }
1165 }
1166 else if (new[0] != 0) local_authenticated_sender = new;
1167 }
1168
1169/* Add the authenticated sender address if present */
1170
1171if ((smtp_authenticated || ob->authenticated_sender_force) &&
1172 local_authenticated_sender != NULL)
1173 {
1174 string_format(buffer, bufsize, " AUTH=%s",
1175 auth_xtextencode(local_authenticated_sender,
1176 Ustrlen(local_authenticated_sender)));
1177 client_authenticated_sender = string_copy(local_authenticated_sender);
1178 }
1179else
1180 *buffer= 0;
1181
1182return FALSE;
1183}
1184
1185
1186
0e66b3b6 1187#ifdef EXPERIMENTAL_DANE
2d5fdd53
JH
1188/* Lookup TLSA record for host/port.
1189Return: OK success with dnssec; DANE mode
1190 DEFER Do not use this host now, may retry later
1191 FAIL_FORCED No TLSA record; DANE not usable
1192 FAIL Do not use this connection
1193*/
1194
0e66b3b6 1195int
4b0fe319 1196tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required)
0e66b3b6
JH
1197{
1198/* move this out to host.c given the similarity to dns_lookup() ? */
1199uschar buffer[300];
55414b25 1200const uschar * fullname = buffer;
58c30e47
JH
1201int rc;
1202BOOL sec;
0e66b3b6
JH
1203
1204/* TLSA lookup string */
1205(void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name);
1206
58c30e47
JH
1207rc = dns_lookup(dnsa, buffer, T_TLSA, &fullname);
1208sec = dns_is_secure(dnsa);
1209DEBUG(D_transport)
1210 debug_printf("TLSA lookup ret %d %sDNSSEC\n", rc, sec ? "" : "not ");
1211
1212switch (rc)
0e66b3b6 1213 {
0e66b3b6 1214 case DNS_SUCCEED:
58c30e47 1215 if (sec) return OK;
2d5fdd53 1216
58c30e47
JH
1217 log_write(0, LOG_MAIN, "DANE error: TLSA lookup not DNSSEC");
1218 /*FALLTHROUGH*/
2d5fdd53
JH
1219 case DNS_AGAIN:
1220 return DEFER; /* just defer this TLS'd conn */
1221
ef3a1a30
JH
1222 case DNS_NODATA: /* no TLSA RR for this lookup */
1223 case DNS_NOMATCH: /* no records at all for this lookup */
6b524204 1224 return dane_required ? FAIL : FAIL_FORCED;
2d5fdd53
JH
1225
1226 default:
1227 case DNS_FAIL:
1228 return dane_required ? FAIL : DEFER;
0e66b3b6 1229 }
0e66b3b6
JH
1230}
1231#endif
1232
1233
a39bd74d
JB
1234
1235typedef struct smtp_compare_s
1236{
1237 uschar *current_sender_address;
1238 struct transport_instance *tblock;
1239} smtp_compare_t;
1240
d093f8e5
JH
1241
1242/* Create a unique string that identifies this message, it is based on
1243sender_address, helo_data and tls_certificate if enabled.
1244*/
a39bd74d
JB
1245
1246static uschar *
1247smtp_local_identity(uschar * sender, struct transport_instance * tblock)
1248{
1249address_item * addr1;
1250uschar * if1 = US"";
1251uschar * helo1 = US"";
1252#ifdef SUPPORT_TLS
1253uschar * tlsc1 = US"";
1254#endif
1255uschar * save_sender_address = sender_address;
1256uschar * local_identity = NULL;
1257smtp_transport_options_block * ob =
1258 (smtp_transport_options_block *)tblock->options_block;
1259
1260sender_address = sender;
1261
1262addr1 = deliver_make_addr (sender, TRUE);
1263deliver_set_expansions(addr1);
1264
1265if (ob->interface)
1266 if1 = expand_string(ob->interface);
1267
1268if (ob->helo_data)
1269 helo1 = expand_string(ob->helo_data);
1270
1271#ifdef SUPPORT_TLS
1272if (ob->tls_certificate)
1273 tlsc1 = expand_string(ob->tls_certificate);
1274local_identity = string_sprintf ("%s^%s^%s", if1, helo1, tlsc1);
1275#else
1276local_identity = string_sprintf ("%s^%s", if1, helo1);
1277#endif
1278
1279deliver_set_expansions(NULL);
1280sender_address = save_sender_address;
1281
1282return local_identity;
1283}
1284
1285
1286
1287/* This routine is a callback that is called from transport_check_waiting.
1288This function will evaluate the incoming message versus the previous
1289message. If the incoming message is using a different local identity then
1290we will veto this new message. */
1291
1292static BOOL
1293smtp_are_same_identities(uschar * message_id, smtp_compare_t * s_compare)
1294{
dadff1d4
HSHR
1295uschar * message_local_identity,
1296 * current_local_identity,
1297 * new_sender_address;
1298
1299current_local_identity =
a39bd74d 1300 smtp_local_identity(s_compare->current_sender_address, s_compare->tblock);
a39bd74d 1301
dadff1d4
HSHR
1302if (!(new_sender_address = deliver_get_sender_address(message_id)))
1303 return 0;
1304
1305message_local_identity =
1306 smtp_local_identity(new_sender_address, s_compare->tblock);
a39bd74d
JB
1307
1308return Ustrcmp(current_local_identity, message_local_identity) == 0;
1309}
1310
1311
1312
e9166683
JH
1313static uschar
1314ehlo_response(uschar * buf, uschar checks)
9094b84b 1315{
e9166683
JH
1316size_t bsize = Ustrlen(buf);
1317
9094b84b 1318#ifdef SUPPORT_TLS
ff5aac2b
JH
1319if ( checks & PEER_OFFERED_TLS
1320 && pcre_exec(regex_STARTTLS, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1321 checks &= ~PEER_OFFERED_TLS;
9094b84b
JH
1322#endif
1323
ff5aac2b
JH
1324if ( checks & PEER_OFFERED_IGNQ
1325 && pcre_exec(regex_IGNOREQUOTA, NULL, CS buf, bsize, 0,
1326 PCRE_EOPT, NULL, 0) < 0)
1327 checks &= ~PEER_OFFERED_IGNQ;
9094b84b 1328
f98442df
JH
1329if ( checks & PEER_OFFERED_CHUNKING
1330 && pcre_exec(regex_CHUNKING, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1331 checks &= ~PEER_OFFERED_CHUNKING;
1332
9094b84b 1333#ifndef DISABLE_PRDR
ff5aac2b
JH
1334if ( checks & PEER_OFFERED_PRDR
1335 && pcre_exec(regex_PRDR, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1336 checks &= ~PEER_OFFERED_PRDR;
9094b84b
JH
1337#endif
1338
1339#ifdef SUPPORT_I18N
ff5aac2b
JH
1340if ( checks & PEER_OFFERED_UTF8
1341 && pcre_exec(regex_UTF8, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1342 checks &= ~PEER_OFFERED_UTF8;
9094b84b
JH
1343#endif
1344
ff5aac2b
JH
1345if ( checks & PEER_OFFERED_DSN
1346 && pcre_exec(regex_DSN, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1347 checks &= ~PEER_OFFERED_DSN;
9094b84b 1348
ff5aac2b
JH
1349if ( checks & PEER_OFFERED_PIPE
1350 && pcre_exec(regex_PIPELINING, NULL, CS buf, bsize, 0,
1351 PCRE_EOPT, NULL, 0) < 0)
1352 checks &= ~PEER_OFFERED_PIPE;
9094b84b 1353
ff5aac2b
JH
1354if ( checks & PEER_OFFERED_SIZE
1355 && pcre_exec(regex_SIZE, NULL, CS buf, bsize, 0, PCRE_EOPT, NULL, 0) < 0)
1356 checks &= ~PEER_OFFERED_SIZE;
9094b84b
JH
1357
1358return checks;
1359}
1360
1361
6d5c916c
JH
1362
1363/* Callback for emitting a BDAT data chunk header.
6d5c916c 1364
e027f545
JH
1365If given a nonzero size, first flush any buffered SMTP commands
1366then emit the command.
1367
d2aa036b
JH
1368Reap previous SMTP command responses if requested, and always reap
1369the response from a previous BDAT command.
1370
1371Args:
1372 tctx transport context
1373 chunk_size value for SMTP BDAT command
1374 flags
1375 tc_chunk_last add LAST option to SMTP BDAT command
1376 tc_reap_prev reap response to previous SMTP commands
6d5c916c
JH
1377
1378Returns: OK or ERROR
1379*/
1380
1381static int
d2aa036b
JH
1382smtp_chunk_cmd_callback(transport_ctx * tctx, unsigned chunk_size,
1383 unsigned flags)
6d5c916c
JH
1384{
1385smtp_transport_options_block * ob =
1386 (smtp_transport_options_block *)(tctx->tblock->options_block);
e9166683 1387smtp_context * sx = tctx->smtp_context;
e027f545
JH
1388int cmd_count = 0;
1389int prev_cmd_count;
6d5c916c 1390
4e910c01
JH
1391/* Write SMTP chunk header command. If not reaping responses, note that
1392there may be more writes (like, the chunk data) done soon. */
6d5c916c 1393
e027f545 1394if (chunk_size > 0)
87cb4a16 1395 {
4e910c01
JH
1396 if((cmd_count = smtp_write_command(&sx->outblock,
1397 flags & tc_reap_prev ? SCMD_FLUSH : SCMD_MORE,
1398 "BDAT %u%s\r\n", chunk_size, flags & tc_chunk_last ? " LAST" : "")
e027f545 1399 ) < 0) return ERROR;
87cb4a16
JH
1400 if (flags & tc_chunk_last)
1401 data_command = string_copy(big_buffer); /* Save for later error message */
1402 }
e027f545 1403
e9166683 1404prev_cmd_count = cmd_count += sx->cmd_count;
6d5c916c 1405
e027f545 1406/* Reap responses for any previous, but not one we just emitted */
6d5c916c 1407
e027f545
JH
1408if (chunk_size > 0)
1409 prev_cmd_count--;
e9166683 1410if (sx->pending_BDAT)
e027f545 1411 prev_cmd_count--;
6d5c916c 1412
e027f545 1413if (flags & tc_reap_prev && prev_cmd_count > 0)
6d5c916c 1414 {
58fc5fb2
JH
1415 DEBUG(D_transport) debug_printf("look for %d responses"
1416 " for previous pipelined cmds\n", prev_cmd_count);
6d5c916c 1417
e9166683 1418 switch(sync_responses(sx, prev_cmd_count, 0))
e027f545
JH
1419 {
1420 case 1: /* 2xx (only) => OK */
e9166683
JH
1421 case 3: sx->good_RCPT = TRUE; /* 2xx & 5xx => OK & progress made */
1422 case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */
e027f545
JH
1423 case 0: break; /* No 2xx or 5xx, but no probs */
1424
1425 case -1: /* Timeout on RCPT */
1426 default: return ERROR; /* I/O error, or any MAIL/DATA error */
1427 }
1428 cmd_count = 1;
e9166683 1429 if (!sx->pending_BDAT)
e027f545 1430 pipelining_active = FALSE;
6d5c916c 1431 }
e027f545 1432
58fc5fb2 1433/* Reap response for an outstanding BDAT */
e027f545 1434
e9166683 1435if (sx->pending_BDAT)
e027f545 1436 {
58fc5fb2
JH
1437 DEBUG(D_transport) debug_printf("look for one response for BDAT\n");
1438
e9166683 1439 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
e027f545
JH
1440 ob->command_timeout))
1441 {
e9166683 1442 if (errno == 0 && sx->buffer[0] == '4')
e027f545
JH
1443 {
1444 errno = ERRNO_DATA4XX; /*XXX does this actually get used? */
36e55f49 1445 sx->addrlist->more_errno |=
e9166683 1446 ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
e027f545
JH
1447 }
1448 return ERROR;
1449 }
1450 cmd_count--;
e9166683 1451 sx->pending_BDAT = FALSE;
e027f545
JH
1452 pipelining_active = FALSE;
1453 }
1454else if (chunk_size > 0)
e9166683 1455 sx->pending_BDAT = TRUE;
e027f545
JH
1456
1457
e9166683 1458sx->cmd_count = cmd_count;
e027f545 1459return OK;
6d5c916c
JH
1460}
1461
1462
1463
0756eb3c 1464/*************************************************
d093f8e5 1465* Make connection for given message *
0756eb3c
PH
1466*************************************************/
1467
d093f8e5
JH
1468/*
1469Arguments:
1470 ctx connection context
d093f8e5
JH
1471 suppress_tls if TRUE, don't attempt a TLS connection - this is set for
1472 a second attempt after TLS initialization fails
d093f8e5
JH
1473
1474Returns: OK - the connection was made and the delivery attempted;
1475 fd is set in the conn context, tls_out set up.
1476 DEFER - the connection could not be made, or something failed
1477 while setting up the SMTP session, or there was a
1478 non-message-specific error, such as a timeout.
1479 ERROR - helo_data or add_headers or authenticated_sender is
1480 specified for this transport, and the string failed
1481 to expand
1482*/
1483int
e9166683 1484smtp_setup_conn(smtp_context * sx, BOOL suppress_tls)
d093f8e5
JH
1485{
1486#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
1487dns_answer tlsa_dnsa;
1488#endif
1489BOOL pass_message = FALSE;
d093f8e5 1490uschar * message = NULL;
d093f8e5
JH
1491int yield = OK;
1492int rc;
1493
02b41d71 1494sx->ob = (smtp_transport_options_block *) sx->tblock->options_block;
d093f8e5
JH
1495
1496sx->lmtp = strcmpic(sx->ob->protocol, US"lmtp") == 0;
1497sx->smtps = strcmpic(sx->ob->protocol, US"smtps") == 0;
1498sx->ok = FALSE;
1499sx->send_rset = TRUE;
1500sx->send_quit = TRUE;
1501sx->setting_up = TRUE;
1502sx->esmtp = TRUE;
1503sx->esmtp_sent = FALSE;
59a286ef 1504#ifdef SUPPORT_I18N
d093f8e5 1505sx->utf8_needed = FALSE;
59a286ef 1506#endif
d093f8e5 1507sx->dsn_all_lasthop = TRUE;
59a286ef 1508#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
d093f8e5
JH
1509sx->dane = FALSE;
1510sx->dane_required = verify_check_given_host(&sx->ob->hosts_require_dane, sx->host) == OK;
1511#endif
1512
1513if ((sx->max_rcpt = sx->tblock->max_addresses) == 0) sx->max_rcpt = 999999;
d093f8e5
JH
1514sx->peer_offered = 0;
1515sx->igquotstr = US"";
02b41d71 1516if (!sx->helo_data) sx->helo_data = sx->ob->helo_data;
d093f8e5
JH
1517#ifdef EXPERIMENTAL_DSN_INFO
1518sx->smtp_greeting = NULL;
1519sx->helo_response = NULL;
59a286ef
JH
1520#endif
1521
0756eb3c 1522smtp_command = US"initial connection";
d093f8e5 1523sx->buffer[0] = '\0';
0756eb3c
PH
1524
1525/* Set up the buffer for reading SMTP response packets. */
1526
d093f8e5
JH
1527sx->inblock.buffer = sx->inbuffer;
1528sx->inblock.buffersize = sizeof(sx->inbuffer);
1529sx->inblock.ptr = sx->inbuffer;
1530sx->inblock.ptrend = sx->inbuffer;
0756eb3c
PH
1531
1532/* Set up the buffer for holding SMTP commands while pipelining */
1533
d093f8e5
JH
1534sx->outblock.buffer = sx->outbuffer;
1535sx->outblock.buffersize = sizeof(sx->outbuffer);
1536sx->outblock.ptr = sx->outbuffer;
1537sx->outblock.cmd_count = 0;
1538sx->outblock.authenticating = FALSE;
0756eb3c 1539
6c512171
PH
1540/* Reset the parameters of a TLS session. */
1541
817d9f57
JH
1542tls_out.bits = 0;
1543tls_out.cipher = NULL; /* the one we may use for this transport */
9d1c15ef
JH
1544tls_out.ourcert = NULL;
1545tls_out.peercert = NULL;
817d9f57
JH
1546tls_out.peerdn = NULL;
1547#if defined(SUPPORT_TLS) && !defined(USE_GNUTLS)
1548tls_out.sni = NULL;
5b456975 1549#endif
018058b2 1550tls_out.ocsp = OCSP_NOT_REQ;
6c512171 1551
35aba663
JH
1552/* Flip the legacy TLS-related variables over to the outbound set in case
1553they're used in the context of the transport. Don't bother resetting
02b41d71
JH
1554afterward (when being used by a transport) as we're in a subprocess.
1555For verify, unflipped once the callout is dealt with */
35aba663
JH
1556
1557tls_modify_variables(&tls_out);
1558
061b7ebd 1559#ifndef SUPPORT_TLS
d093f8e5 1560if (sx->smtps)
061b7ebd 1561 {
d093f8e5 1562 set_errno_nohost(sx->addrlist, ERRNO_TLSFAILURE, US"TLS support not available",
895fbaf2 1563 DEFER, FALSE);
018058b2 1564 return ERROR;
061b7ebd
PP
1565 }
1566#endif
1567
0756eb3c
PH
1568/* Make a connection to the host if this isn't a continued delivery, and handle
1569the initial interaction and HELO/EHLO/LHLO. Connect timeout errors are handled
1570specially so they can be identified for retries. */
1571
58c30e47 1572if (!continue_hostname)
0756eb3c 1573 {
e9166683 1574 if (sx->verify)
02b41d71
JH
1575 HDEBUG(D_verify) debug_printf("interface=%s port=%d\n", sx->interface, sx->port);
1576
58c30e47 1577 /* Get the actual port the connection will use, into sx->host */
4311097e 1578
58c30e47 1579 smtp_port_for_connect(sx->host, sx->port);
0756eb3c 1580
0e66b3b6 1581#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_DANE)
58c30e47 1582 /* Do TLSA lookup for DANE */
0e66b3b6 1583 {
0e66b3b6
JH
1584 tls_out.dane_verified = FALSE;
1585 tls_out.tlsa_usage = 0;
1586
d093f8e5 1587 if (sx->host->dnssec == DS_YES)
0e66b3b6 1588 {
d093f8e5
JH
1589 if( sx->dane_required
1590 || verify_check_given_host(&sx->ob->hosts_try_dane, sx->host) == OK
0e66b3b6 1591 )
d093f8e5 1592 switch (rc = tlsa_lookup(sx->host, &tlsa_dnsa, sx->dane_required))
4b0fe319 1593 {
58c30e47
JH
1594 case OK: sx->dane = TRUE;
1595 sx->ob->tls_tempfail_tryclear = FALSE;
1596 break;
2d5fdd53 1597 case FAIL_FORCED: break;
d093f8e5 1598 default: set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
2d5fdd53
JH
1599 string_sprintf("DANE error: tlsa lookup %s",
1600 rc == DEFER ? "DEFER" : "FAIL"),
1601 rc, FALSE);
1602 return rc;
4b0fe319 1603 }
0e66b3b6 1604 }
d093f8e5 1605 else if (sx->dane_required)
0e66b3b6 1606 {
d093f8e5
JH
1607 set_errno_nohost(sx->addrlist, ERRNO_DNSDEFER,
1608 string_sprintf("DANE error: %s lookup not DNSSEC", sx->host->name),
895fbaf2 1609 FAIL, FALSE);
4b0fe319 1610 return FAIL;
0e66b3b6 1611 }
0e66b3b6
JH
1612 }
1613#endif /*DANE*/
1614
58c30e47
JH
1615 /* Make the TCP connection */
1616
1617 sx->inblock.sock = sx->outblock.sock =
1618 smtp_connect(sx->host, sx->host_af, sx->interface,
1619 sx->ob->connect_timeout, sx->tblock);
1620
1621 if (sx->inblock.sock < 0)
1622 {
1623 uschar * msg = NULL;
1624 if (sx->verify)
1625 {
1626 msg = US strerror(errno);
1627 HDEBUG(D_verify) debug_printf("connect: %s\n", msg);
1628 }
1629 set_errno_nohost(sx->addrlist,
1630 errno == ETIMEDOUT ? ERRNO_CONNECTTIMEOUT : errno,
1631 sx->verify ? string_sprintf("could not connect: %s", msg)
1632 : NULL,
1633 DEFER, FALSE);
1634 sx->send_quit = FALSE;
1635 return DEFER;
1636 }
1637
41c7c167
PH
1638 /* Expand the greeting message while waiting for the initial response. (Makes
1639 sense if helo_data contains ${lookup dnsdb ...} stuff). The expansion is
1640 delayed till here so that $sending_interface and $sending_port are set. */
1641
02b41d71
JH
1642 if (sx->helo_data)
1643 if (!(sx->helo_data = expand_string(sx->helo_data)))
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
8c5d388a 1649#ifdef SUPPORT_I18N
d093f8e5 1650 if (sx->helo_data)
810d16ad 1651 {
02b41d71
JH
1652 expand_string_message = NULL;
1653 if ((sx->helo_data = string_domain_utf8_to_alabel(sx->helo_data,
1654 &expand_string_message)),
1655 expand_string_message)
e9166683 1656 if (sx->verify)
02b41d71
JH
1657 log_write(0, LOG_MAIN|LOG_PANIC,
1658 "<%s>: failed to expand transport's helo_data value for callout: %s",
1659 sx->addrlist->address, expand_string_message);
1660 else
1661 sx->helo_data = NULL;
810d16ad
JH
1662 }
1663#endif
41c7c167 1664
0756eb3c
PH
1665 /* The first thing is to wait for an initial OK response. The dreaded "goto"
1666 is nevertheless a reasonably clean way of programming this kind of logic,
1667 where you want to escape on any error. */
1668
d093f8e5 1669 if (!sx->smtps)
061b7ebd 1670 {
8d330698
JH
1671 BOOL good_response;
1672
1673#ifdef TCP_QUICKACK
d093f8e5 1674 (void) setsockopt(sx->inblock.sock, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off));
8d330698 1675#endif
d093f8e5
JH
1676 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
1677 '2', sx->ob->command_timeout);
895fbaf2 1678#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1679 sx->smtp_greeting = string_copy(sx->buffer);
895fbaf2
JH
1680#endif
1681 if (!good_response) goto RESPONSE_FAILED;
0756eb3c 1682
0cbf2b82 1683#ifndef DISABLE_EVENT
b30275b8 1684 {
805c9d53 1685 uschar * s;
d093f8e5
JH
1686 lookup_dnssec_authenticated = sx->host->dnssec==DS_YES ? US"yes"
1687 : sx->host->dnssec==DS_NO ? US"no" : NULL;
1688 s = event_raise(sx->tblock->event_action, US"smtp:connect", sx->buffer);
b30275b8 1689 if (s)
a7538db1 1690 {
d093f8e5 1691 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL,
b30275b8 1692 string_sprintf("deferred by smtp:connect event expansion: %s", s),
895fbaf2 1693 DEFER, FALSE);
a7538db1
JH
1694 yield = DEFER;
1695 goto SEND_QUIT;
1696 }
b30275b8 1697 }
a7538db1
JH
1698#endif
1699
061b7ebd
PP
1700 /* Now check if the helo_data expansion went well, and sign off cleanly if
1701 it didn't. */
41c7c167 1702
d093f8e5 1703 if (!sx->helo_data)
061b7ebd 1704 {
d093f8e5 1705 message = string_sprintf("failed to expand helo_data: %s",
061b7ebd 1706 expand_string_message);
d093f8e5 1707 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
061b7ebd
PP
1708 yield = DEFER;
1709 goto SEND_QUIT;
1710 }
41c7c167
PH
1711 }
1712
0756eb3c 1713/** Debugging without sending a message
d093f8e5 1714sx->addrlist->transport_return = DEFER;
0756eb3c
PH
1715goto SEND_QUIT;
1716**/
1717
1718 /* Errors that occur after this point follow an SMTP command, which is
1719 left in big_buffer by smtp_write_command() for use in error messages. */
1720
1721 smtp_command = big_buffer;
1722
1723 /* Tell the remote who we are...
1724
1725 February 1998: A convention has evolved that ESMTP-speaking MTAs include the
1726 string "ESMTP" in their greeting lines, so make Exim send EHLO if the
1727 greeting is of this form. The assumption was that the far end supports it
1728 properly... but experience shows that there are some that give 5xx responses,
1729 even though the banner includes "ESMTP" (there's a bloody-minded one that
1730 says "ESMTP not spoken here"). Cope with that case.
1731
1732 September 2000: Time has passed, and it seems reasonable now to always send
1733 EHLO at the start. It is also convenient to make the change while installing
1734 the TLS stuff.
1735
1736 July 2003: Joachim Wieland met a broken server that advertises "PIPELINING"
1737 but times out after sending MAIL FROM, RCPT TO and DATA all together. There
1738 would be no way to send out the mails, so there is now a host list
1739 "hosts_avoid_esmtp" that disables ESMTP for special hosts and solves the
1740 PIPELINING problem as well. Maybe it can also be useful to cure other
1741 problems with broken servers.
1742
1743 Exim originally sent "Helo" at this point and ran for nearly a year that way.
1744 Then somebody tried it with a Microsoft mailer... It seems that all other
1745 mailers use upper case for some reason (the RFC is quite clear about case
1746 independence) so, for peace of mind, I gave in. */
1747
d093f8e5 1748 sx->esmtp = verify_check_given_host(&sx->ob->hosts_avoid_esmtp, sx->host) != OK;
0756eb3c 1749
061b7ebd
PP
1750 /* Alas; be careful, since this goto is not an error-out, so conceivably
1751 we might set data between here and the target which we assume to exist
1752 and be usable. I can see this coming back to bite us. */
a7538db1 1753#ifdef SUPPORT_TLS
d093f8e5 1754 if (sx->smtps)
061b7ebd 1755 {
2d14f397 1756 smtp_peer_options |= PEER_OFFERED_TLS;
061b7ebd 1757 suppress_tls = FALSE;
d093f8e5 1758 sx->ob->tls_tempfail_tryclear = FALSE;
061b7ebd
PP
1759 smtp_command = US"SSL-on-connect";
1760 goto TLS_NEGOTIATE;
1761 }
a7538db1 1762#endif
061b7ebd 1763
d093f8e5 1764 if (sx->esmtp)
0756eb3c 1765 {
4e910c01 1766 if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n",
d093f8e5 1767 sx->lmtp ? "LHLO" : "EHLO", sx->helo_data) < 0)
0756eb3c 1768 goto SEND_FAILED;
d093f8e5
JH
1769 sx->esmtp_sent = TRUE;
1770 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
1771 sx->ob->command_timeout))
0756eb3c 1772 {
d093f8e5 1773 if (errno != 0 || sx->buffer[0] == 0 || sx->lmtp)
895fbaf2
JH
1774 {
1775#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1776 sx->helo_response = string_copy(sx->buffer);
895fbaf2
JH
1777#endif
1778 goto RESPONSE_FAILED;
1779 }
d093f8e5 1780 sx->esmtp = FALSE;
0756eb3c 1781 }
895fbaf2 1782#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1783 sx->helo_response = string_copy(sx->buffer);
895fbaf2 1784#endif
0756eb3c
PH
1785 }
1786 else
0756eb3c
PH
1787 DEBUG(D_transport)
1788 debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
0756eb3c 1789
d093f8e5 1790 if (!sx->esmtp)
0756eb3c 1791 {
895fbaf2 1792 BOOL good_response;
d093f8e5
JH
1793 int n = sizeof(sx->buffer);
1794 uschar * rsp = sx->buffer;
a57ce043 1795
d093f8e5
JH
1796 if (sx->esmtp_sent && (n = Ustrlen(sx->buffer)) < sizeof(sx->buffer)/2)
1797 { rsp = sx->buffer + n + 1; n = sizeof(sx->buffer) - n; }
895fbaf2 1798
4e910c01 1799 if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "HELO %s\r\n", sx->helo_data) < 0)
0756eb3c 1800 goto SEND_FAILED;
d093f8e5
JH
1801 good_response = smtp_read_response(&sx->inblock, rsp, n,
1802 '2', sx->ob->command_timeout);
895fbaf2 1803#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1804 sx->helo_response = string_copy(rsp);
895fbaf2 1805#endif
a57ce043
JH
1806 if (!good_response)
1807 {
1808 /* Handle special logging for a closed connection after HELO
1809 when had previously sent EHLO */
1810
d093f8e5 1811 if (rsp != sx->buffer && rsp[0] == 0 && (errno == 0 || errno == ECONNRESET))
a57ce043 1812 {
de6273b4
JH
1813 errno = ERRNO_SMTPCLOSED;
1814 goto EHLOHELO_FAILED;
a57ce043 1815 }
d093f8e5 1816 Ustrncpy(sx->buffer, rsp, sizeof(sx->buffer)/2);
a57ce043
JH
1817 goto RESPONSE_FAILED;
1818 }
0756eb3c
PH
1819 }
1820
d093f8e5 1821 sx->peer_offered = smtp_peer_options = 0;
2d14f397 1822
d093f8e5 1823 if (sx->esmtp || sx->lmtp)
2d14f397 1824 {
e9166683 1825 sx->peer_offered = ehlo_response(sx->buffer,
ff5aac2b 1826 PEER_OFFERED_TLS /* others checked later */
9094b84b 1827 );
f1513293 1828
0756eb3c
PH
1829 /* Set tls_offered if the response to EHLO specifies support for STARTTLS. */
1830
a7538db1 1831#ifdef SUPPORT_TLS
d093f8e5 1832 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_TLS;
7ade712c 1833#endif
2d14f397 1834 }
0756eb3c
PH
1835 }
1836
57cc2785
JH
1837/* For continuing deliveries down the same channel, having re-exec'd the socket
1838is the standard input; for a socket held open from verify it is recorded
1839in the cutthrough context block. Either way we don't need to redo EHLO here
1840(but may need to do so for TLS - see below).
1841Set up the pointer to where subsequent commands will be left, for
2d14f397 1842error messages. Note that smtp_peer_options will have been
0756eb3c
PH
1843set from the command line if they were set in the process that passed the
1844connection on. */
1845
895fbaf2 1846/*XXX continue case needs to propagate DSN_INFO, prob. in deliver.c
4c04137d 1847as the continue goes via transport_pass_socket() and doublefork and exec.
895fbaf2
JH
1848It does not wait. Unclear how we keep separate host's responses
1849separate - we could match up by host ip+port as a bodge. */
1850
0756eb3c
PH
1851else
1852 {
57cc2785
JH
1853 if (cutthrough.fd >= 0 && cutthrough.callout_hold_only)
1854 {
1855 sx->inblock.sock = sx->outblock.sock = cutthrough.fd;
1856 sx->host->port = sx->port = cutthrough.host.port;
1857 }
1858 else
1859 {
1860 sx->inblock.sock = sx->outblock.sock = 0; /* stdin */
a843a57e 1861 smtp_port_for_connect(sx->host, sx->port); /* Record the port that was used */
57cc2785 1862 }
0756eb3c 1863 smtp_command = big_buffer;
02b41d71 1864 sx->helo_data = NULL; /* ensure we re-expand ob->helo_data */
875512a3 1865
57cc2785
JH
1866 /* For a continued connection with TLS being proxied for us, or a
1867 held-open verify connection with TLS, nothing more to do. */
875512a3 1868
57cc2785
JH
1869 if ( continue_proxy_cipher
1870 || (cutthrough.fd >= 0 && cutthrough.callout_hold_only && cutthrough.is_tls)
1871 )
875512a3
JH
1872 {
1873 sx->peer_offered = smtp_peer_options;
1874 pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE);
57cc2785
JH
1875 HDEBUG(D_transport) debug_printf("continued connection, %s TLS\n",
1876 continue_proxy_cipher ? "proxied" : "verify conn with");
875512a3
JH
1877 return OK;
1878 }
1879 HDEBUG(D_transport) debug_printf("continued connection, no TLS\n");
0756eb3c
PH
1880 }
1881
1882/* If TLS is available on this connection, whether continued or not, attempt to
1883start up a TLS session, unless the host is in hosts_avoid_tls. If successful,
1884send another EHLO - the server may give a different answer in secure mode. We
1885use a separate buffer for reading the response to STARTTLS so that if it is
1886negative, the original EHLO data is available for subsequent analysis, should
1887the client not be required to use TLS. If the response is bad, copy the buffer
1888for error analysis. */
1889
1890#ifdef SUPPORT_TLS
2d14f397 1891if ( smtp_peer_options & PEER_OFFERED_TLS
5130845b 1892 && !suppress_tls
02b41d71 1893 && verify_check_given_host(&sx->ob->hosts_avoid_tls, sx->host) != OK
e9166683 1894 && ( !sx->verify
02b41d71
JH
1895 || verify_check_given_host(&sx->ob->hosts_verify_avoid_tls, sx->host) != OK
1896 ) )
0756eb3c
PH
1897 {
1898 uschar buffer2[4096];
4e910c01 1899 if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "STARTTLS\r\n") < 0)
0756eb3c
PH
1900 goto SEND_FAILED;
1901
1902 /* If there is an I/O error, transmission of this message is deferred. If
1903 there is a temporary rejection of STARRTLS and tls_tempfail_tryclear is
1904 false, we also defer. However, if there is a temporary rejection of STARTTLS
1905 and tls_tempfail_tryclear is true, or if there is an outright rejection of
1906 STARTTLS, we carry on. This means we will try to send the message in clear,
1907 unless the host is in hosts_require_tls (tested below). */
1908
d093f8e5
JH
1909 if (!smtp_read_response(&sx->inblock, buffer2, sizeof(buffer2), '2',
1910 sx->ob->command_timeout))
0756eb3c 1911 {
4b0fe319
JH
1912 if ( errno != 0
1913 || buffer2[0] == 0
d093f8e5 1914 || (buffer2[0] == '4' && !sx->ob->tls_tempfail_tryclear)
4b0fe319 1915 )
0dda4340 1916 {
d093f8e5 1917 Ustrncpy(sx->buffer, buffer2, sizeof(sx->buffer));
9e7e0f6a 1918 sx->buffer[sizeof(sx->buffer)-1] = '\0';
0756eb3c 1919 goto RESPONSE_FAILED;
0dda4340 1920 }
0756eb3c
PH
1921 }
1922
1923 /* STARTTLS accepted: try to negotiate a TLS session. */
1924
1925 else
061b7ebd 1926 TLS_NEGOTIATE:
0756eb3c 1927 {
d093f8e5 1928 address_item * addr;
cf0c6164
JH
1929 uschar * errstr;
1930 int rc = tls_client_start(sx->inblock.sock, sx->host, sx->addrlist, sx->tblock,
0e66b3b6 1931# ifdef EXPERIMENTAL_DANE
cf0c6164 1932 sx->dane ? &tlsa_dnsa : NULL,
0e66b3b6 1933# endif
cf0c6164 1934 &errstr);
0756eb3c
PH
1935
1936 /* TLS negotiation failed; give an error. From outside, this function may
1937 be called again to try in clear on a new connection, if the options permit
1938 it for this host. */
1939
1940 if (rc != OK)
1941 {
6ebd79ec 1942# ifdef EXPERIMENTAL_DANE
d093f8e5 1943 if (sx->dane) log_write(0, LOG_MAIN,
cf0c6164
JH
1944 "DANE attempt failed; TLS connection to %s [%s]: %s",
1945 sx->host->name, sx->host->address, errstr);
6ebd79ec
JH
1946# endif
1947
de6273b4 1948 errno = ERRNO_TLSFAILURE;
cf0c6164 1949 message = string_sprintf("TLS session: %s", errstr);
d093f8e5 1950 sx->send_quit = FALSE;
0756eb3c
PH
1951 goto TLS_FAILED;
1952 }
1953
1954 /* TLS session is set up */
1955
2d14f397 1956 smtp_peer_options_wrap = smtp_peer_options;
d093f8e5 1957 for (addr = sx->addrlist; addr; addr = addr->next)
5ca2a9a1
PH
1958 if (addr->transport_return == PENDING_DEFER)
1959 {
817d9f57 1960 addr->cipher = tls_out.cipher;
9d1c15ef
JH
1961 addr->ourcert = tls_out.ourcert;
1962 addr->peercert = tls_out.peercert;
817d9f57 1963 addr->peerdn = tls_out.peerdn;
018058b2 1964 addr->ocsp = tls_out.ocsp;
5ca2a9a1 1965 }
0756eb3c
PH
1966 }
1967 }
1968
061b7ebd
PP
1969/* if smtps, we'll have smtp_command set to something else; always safe to
1970reset it here. */
1971smtp_command = big_buffer;
1972
41c7c167
PH
1973/* If we started TLS, redo the EHLO/LHLO exchange over the secure channel. If
1974helo_data is null, we are dealing with a connection that was passed from
1975another process, and so we won't have expanded helo_data above. We have to
1976expand it here. $sending_ip_address and $sending_port are set up right at the
1977start of the Exim process (in exim.c). */
0756eb3c 1978
817d9f57 1979if (tls_out.active >= 0)
0756eb3c 1980 {
061b7ebd 1981 char *greeting_cmd;
895fbaf2
JH
1982 BOOL good_response;
1983
d093f8e5 1984 if (!sx->helo_data && !(sx->helo_data = expand_string(sx->ob->helo_data)))
41c7c167 1985 {
d093f8e5
JH
1986 uschar *message = string_sprintf("failed to expand helo_data: %s",
1987 expand_string_message);
1988 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, message, DEFER, FALSE);
1989 yield = DEFER;
1990 goto SEND_QUIT;
41c7c167
PH
1991 }
1992
0d0e4455 1993 /* For SMTPS we need to wait for the initial OK response. */
d093f8e5 1994 if (sx->smtps)
061b7ebd 1995 {
d093f8e5
JH
1996 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
1997 '2', sx->ob->command_timeout);
895fbaf2 1998#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 1999 sx->smtp_greeting = string_copy(sx->buffer);
895fbaf2
JH
2000#endif
2001 if (!good_response) goto RESPONSE_FAILED;
0d0e4455
PP
2002 }
2003
d093f8e5 2004 if (sx->esmtp)
0d0e4455
PP
2005 greeting_cmd = "EHLO";
2006 else
2007 {
2008 greeting_cmd = "HELO";
2009 DEBUG(D_transport)
2010 debug_printf("not sending EHLO (host matches hosts_avoid_esmtp)\n");
061b7ebd
PP
2011 }
2012
4e910c01 2013 if (smtp_write_command(&sx->outblock, SCMD_FLUSH, "%s %s\r\n",
d093f8e5 2014 sx->lmtp ? "LHLO" : greeting_cmd, sx->helo_data) < 0)
0756eb3c 2015 goto SEND_FAILED;
d093f8e5
JH
2016 good_response = smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer),
2017 '2', sx->ob->command_timeout);
895fbaf2 2018#ifdef EXPERIMENTAL_DSN_INFO
d093f8e5 2019 sx->helo_response = string_copy(sx->buffer);
895fbaf2
JH
2020#endif
2021 if (!good_response) goto RESPONSE_FAILED;
2d14f397 2022 smtp_peer_options = 0;
0756eb3c
PH
2023 }
2024
2025/* If the host is required to use a secure channel, ensure that we
2026have one. */
2027
d093f8e5 2028else if ( sx->smtps
0e66b3b6 2029# ifdef EXPERIMENTAL_DANE
d093f8e5 2030 || sx->dane
0e66b3b6 2031# endif
d093f8e5 2032 || verify_check_given_host(&sx->ob->hosts_require_tls, sx->host) == OK
7a31d643 2033 )
0756eb3c 2034 {
de6273b4 2035 errno = ERRNO_TLSREQUIRED;
c562fd30 2036 message = string_sprintf("a TLS session is required, but %s",
2d14f397
JH
2037 smtp_peer_options & PEER_OFFERED_TLS
2038 ? "an attempt to start TLS failed" : "the server did not offer TLS support");
0756eb3c
PH
2039 goto TLS_FAILED;
2040 }
0e66b3b6 2041#endif /*SUPPORT_TLS*/
0756eb3c
PH
2042
2043/* If TLS is active, we have just started it up and re-done the EHLO command,
2044so its response needs to be analyzed. If TLS is not active and this is a
2045continued session down a previously-used socket, we haven't just done EHLO, so
2046we skip this. */
2047
2048if (continue_hostname == NULL
a7538db1 2049#ifdef SUPPORT_TLS
817d9f57 2050 || tls_out.active >= 0
a7538db1 2051#endif
0756eb3c
PH
2052 )
2053 {
d093f8e5 2054 if (sx->esmtp || sx->lmtp)
2d14f397 2055 {
e9166683 2056 sx->peer_offered = ehlo_response(sx->buffer,
d093f8e5
JH
2057 0 /* no TLS */
2058 | (sx->lmtp && sx->ob->lmtp_ignore_quota ? PEER_OFFERED_IGNQ : 0)
2059 | PEER_OFFERED_CHUNKING
2060 | PEER_OFFERED_PRDR
9094b84b 2061#ifdef SUPPORT_I18N
d093f8e5
JH
2062 | (sx->addrlist->prop.utf8_msg ? PEER_OFFERED_UTF8 : 0)
2063 /*XXX if we hand peercaps on to continued-conn processes,
2064 must not depend on this addr */
9094b84b 2065#endif
d093f8e5
JH
2066 | PEER_OFFERED_DSN
2067 | PEER_OFFERED_PIPE
2068 | (sx->ob->size_addition >= 0 ? PEER_OFFERED_SIZE : 0)
9094b84b
JH
2069 );
2070
2d14f397
JH
2071 /* Set for IGNOREQUOTA if the response to LHLO specifies support and the
2072 lmtp_ignore_quota option was set. */
f1513293 2073
d093f8e5 2074 sx->igquotstr = sx->peer_offered & PEER_OFFERED_IGNQ ? US" IGNOREQUOTA" : US"";
f1513293 2075
2d14f397
JH
2076 /* If the response to EHLO specified support for the SIZE parameter, note
2077 this, provided size_addition is non-negative. */
f1513293 2078
d093f8e5 2079 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_SIZE;
0756eb3c 2080
2d14f397
JH
2081 /* Note whether the server supports PIPELINING. If hosts_avoid_esmtp matched
2082 the current host, esmtp will be false, so PIPELINING can never be used. If
2083 the current host matches hosts_avoid_pipelining, don't do it. */
0756eb3c 2084
d093f8e5
JH
2085 if ( sx->peer_offered & PEER_OFFERED_PIPE
2086 && verify_check_given_host(&sx->ob->hosts_avoid_pipelining, sx->host) != OK)
2d14f397 2087 smtp_peer_options |= PEER_OFFERED_PIPE;
0756eb3c 2088
2d14f397
JH
2089 DEBUG(D_transport) debug_printf("%susing PIPELINING\n",
2090 smtp_peer_options & PEER_OFFERED_PIPE ? "" : "not ");
0756eb3c 2091
d093f8e5
JH
2092 if ( sx->peer_offered & PEER_OFFERED_CHUNKING
2093 && verify_check_given_host(&sx->ob->hosts_try_chunking, sx->host) != OK)
2094 sx->peer_offered &= ~PEER_OFFERED_CHUNKING;
f98442df 2095
d093f8e5 2096 if (sx->peer_offered & PEER_OFFERED_CHUNKING)
2d14f397 2097 {DEBUG(D_transport) debug_printf("CHUNKING usable\n");}
0756eb3c 2098
8ccd00b1 2099#ifndef DISABLE_PRDR
d093f8e5
JH
2100 if ( sx->peer_offered & PEER_OFFERED_PRDR
2101 && verify_check_given_host(&sx->ob->hosts_try_prdr, sx->host) != OK)
2102 sx->peer_offered &= ~PEER_OFFERED_PRDR;
fd98a5c6 2103
d093f8e5 2104 if (sx->peer_offered & PEER_OFFERED_PRDR)
2d14f397 2105 {DEBUG(D_transport) debug_printf("PRDR usable\n");}
fd98a5c6
JH
2106#endif
2107
2d14f397 2108 /* Note if the server supports DSN */
d093f8e5 2109 smtp_peer_options |= sx->peer_offered & PEER_OFFERED_DSN;
2d14f397 2110 DEBUG(D_transport) debug_printf("%susing DSN\n",
d093f8e5 2111 sx->peer_offered & PEER_OFFERED_DSN ? "" : "not ");
6c1c3d1d 2112
2d14f397
JH
2113 /* Note if the response to EHLO specifies support for the AUTH extension.
2114 If it has, check that this host is one we want to authenticate to, and do
2115 the business. The host name and address must be available when the
2116 authenticator's client driver is running. */
0756eb3c 2117
d093f8e5
JH
2118 switch (yield = smtp_auth(sx->buffer, sizeof(sx->buffer), sx->addrlist, sx->host,
2119 sx->ob, sx->esmtp, &sx->inblock, &sx->outblock))
2d14f397
JH
2120 {
2121 default: goto SEND_QUIT;
2122 case OK: break;
2123 case FAIL_SEND: goto SEND_FAILED;
2124 case FAIL: goto RESPONSE_FAILED;
2125 }
0756eb3c
PH
2126 }
2127 }
2d14f397 2128pipelining_active = !!(smtp_peer_options & PEER_OFFERED_PIPE);
0756eb3c
PH
2129
2130/* The setting up of the SMTP call is now complete. Any subsequent errors are
2131message-specific. */
2132
d093f8e5 2133sx->setting_up = FALSE;
0756eb3c 2134
8c5d388a 2135#ifdef SUPPORT_I18N
d093f8e5 2136if (sx->addrlist->prop.utf8_msg)
9094b84b 2137 {
d093f8e5
JH
2138 sx->utf8_needed = !sx->addrlist->prop.utf8_downcvt
2139 && !sx->addrlist->prop.utf8_downcvt_maybe;
2140 DEBUG(D_transport) if (!sx->utf8_needed)
59a286ef 2141 debug_printf("utf8: %s downconvert\n",
d093f8e5 2142 sx->addrlist->prop.utf8_downcvt ? "mandatory" : "optional");
9094b84b
JH
2143 }
2144
7ade712c 2145/* If this is an international message we need the host to speak SMTPUTF8 */
d093f8e5 2146if (sx->utf8_needed && !(sx->peer_offered & PEER_OFFERED_UTF8))
7ade712c
JH
2147 {
2148 errno = ERRNO_UTF8_FWD;
2149 goto RESPONSE_FAILED;
2150 }
2151#endif
2152
d093f8e5
JH
2153return OK;
2154
2155
2156 {
2157 int code;
d093f8e5
JH
2158
2159 RESPONSE_FAILED:
d093f8e5 2160 message = NULL;
de6273b4 2161 sx->send_quit = check_response(sx->host, &errno, sx->addrlist->more_errno,
d093f8e5
JH
2162 sx->buffer, &code, &message, &pass_message);
2163 goto FAILED;
d093f8e5
JH
2164
2165 SEND_FAILED:
d093f8e5
JH
2166 code = '4';
2167 message = US string_sprintf("send() to %s [%s] failed: %s",
829dd842 2168 sx->host->name, sx->host->address, strerror(errno));
d093f8e5
JH
2169 sx->send_quit = FALSE;
2170 goto FAILED;
d093f8e5
JH
2171
2172 /* This label is jumped to directly when a TLS negotiation has failed,
2173 or was not done for a host for which it is required. Values will be set
829dd842 2174 in message and errno, and setting_up will always be true. Treat as
d093f8e5
JH
2175 a temporary error. */
2176
de6273b4
JH
2177 EHLOHELO_FAILED:
2178 code = '4';
2179 message = string_sprintf("Remote host closed connection in response to %s"
2180 " (EHLO response was: %s)", smtp_command, sx->buffer);
2181 sx->send_quit = FALSE;
2182 goto FAILED;
2183
d093f8e5
JH
2184#ifdef SUPPORT_TLS
2185 TLS_FAILED:
de6273b4
JH
2186 code = '4';
2187 goto FAILED;
d093f8e5
JH
2188#endif
2189
2190 /* The failure happened while setting up the call; see if the failure was
2191 a 5xx response (this will either be on connection, or following HELO - a 5xx
e69636bc
JH
2192 after EHLO causes it to try HELO). If so, and there are no more hosts to try,
2193 fail all addresses, as this host is never going to accept them. For other
2194 errors during setting up (timeouts or whatever), defer all addresses, and
2195 yield DEFER, so that the host is not tried again for a while.
2196
2197 XXX This peeking for another host feels like a layering violation. We want
2198 to note the host as unusable, but down here we shouldn't know if this was
2199 the last host to try for the addr(list). Perhaps the upper layer should be
2200 the one to do set_errno() ? The problem is that currently the addr is where
2201 errno etc. are stashed, but until we run out of hosts to try the errors are
2202 host-specific. Maybe we should enhance the host_item definition? */
d093f8e5 2203
de6273b4 2204FAILED:
d093f8e5 2205 sx->ok = FALSE; /* For when reached by GOTO */
e69636bc
JH
2206 set_errno(sx->addrlist, errno, message,
2207 sx->host->next
2208 ? DEFER
2209 : code == '5'
d093f8e5 2210#ifdef SUPPORT_I18N
e69636bc 2211 || errno == ERRNO_UTF8_FWD
d093f8e5 2212#endif
e69636bc
JH
2213 ? FAIL : DEFER,
2214 pass_message, sx->host
d093f8e5
JH
2215#ifdef EXPERIMENTAL_DSN_INFO
2216 , sx->smtp_greeting, sx->helo_response
2217#endif
2218 );
e69636bc 2219 yield = DEFER;
d093f8e5
JH
2220 }
2221
2222
2223SEND_QUIT:
2224
2225if (sx->send_quit)
4e910c01 2226 (void)smtp_write_command(&sx->outblock, SCMD_FLUSH, "QUIT\r\n");
d093f8e5 2227
d093f8e5
JH
2228#ifdef SUPPORT_TLS
2229tls_close(FALSE, TRUE);
2230#endif
2231
2232/* Close the socket, and return the appropriate value, first setting
2233works because the NULL setting is passed back to the calling process, and
2234remote_max_parallel is forced to 1 when delivering over an existing connection,
b7d3afcf 2235*/
d093f8e5 2236
e1d04f48 2237HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
d093f8e5
JH
2238if (sx->send_quit)
2239 {
2240 shutdown(sx->outblock.sock, SHUT_WR);
2241 if (fcntl(sx->inblock.sock, F_SETFL, O_NONBLOCK) == 0)
2242 for (rc = 16; read(sx->inblock.sock, sx->inbuffer, sizeof(sx->inbuffer)) > 0 && rc > 0;)
2243 rc--; /* drain socket */
02b41d71 2244 sx->send_quit = FALSE;
d093f8e5
JH
2245 }
2246(void)close(sx->inblock.sock);
02b41d71 2247sx->inblock.sock = sx->outblock.sock = -1;
d093f8e5
JH
2248
2249#ifndef DISABLE_EVENT
2250(void) event_raise(sx->tblock->event_action, US"tcp:close", NULL);
2251#endif
2252
2253continue_transport = NULL;
2254continue_hostname = NULL;
2255return yield;
2256}
2257
2258
9be4572b
JH
2259
2260
2261/* Create the string of options that will be appended to the MAIL FROM:
2262in the connection context buffer */
2263
2264static int
2265build_mailcmd_options(smtp_context * sx, address_item * addrlist)
2266{
2267uschar * p = sx->buffer;
2268address_item * addr;
2269int address_count;
2270
2271*p = 0;
2272
2273/* If we know the receiving MTA supports the SIZE qualification,
2274send it, adding something to the message size to allow for imprecision
2275and things that get added en route. Exim keeps the number of lines
2276in a message, so we can give an accurate value for the original message, but we
2277need some additional to handle added headers. (Double "." characters don't get
2278included in the count.) */
2279
2280if (sx->peer_offered & PEER_OFFERED_SIZE)
2281 {
328c5688
JH
2282/*XXX problem here under spool_files_wireformat?
2283Or just forget about lines? Or inflate by a fixed proportion? */
2284
9be4572b
JH
2285 sprintf(CS p, " SIZE=%d", message_size+message_linecount+sx->ob->size_addition);
2286 while (*p) p++;
2287 }
2288
2289#ifndef DISABLE_PRDR
2290/* If it supports Per-Recipient Data Reponses, and we have omre than one recipient,
2291request that */
2292
2293sx->prdr_active = FALSE;
2294if (sx->peer_offered & PEER_OFFERED_PRDR)
2295 for (addr = addrlist; addr; addr = addr->next)
2296 if (addr->transport_return == PENDING_DEFER)
2297 {
2298 for (addr = addr->next; addr; addr = addr->next)
2299 if (addr->transport_return == PENDING_DEFER)
2300 { /* at least two recipients to send */
2301 sx->prdr_active = TRUE;
2302 sprintf(CS p, " PRDR"); p += 5;
2303 break;
2304 }
2305 break;
2306 }
2307#endif
2308
2309#ifdef SUPPORT_I18N
2310/* If it supports internationalised messages, and this meesage need that,
2311request it */
2312
2313if ( sx->peer_offered & PEER_OFFERED_UTF8
2314 && addrlist->prop.utf8_msg
2315 && !addrlist->prop.utf8_downcvt
2316 )
2317 Ustrcpy(p, " SMTPUTF8"), p += 9;
2318#endif
2319
2320/* check if all addresses have DSN-lasthop flag; do not send RET and ENVID if so */
2321for (sx->dsn_all_lasthop = TRUE, addr = addrlist, address_count = 0;
2322 addr && address_count < sx->max_rcpt;
2323 addr = addr->next) if (addr->transport_return == PENDING_DEFER)
2324 {
2325 address_count++;
2326 if (!(addr->dsn_flags & rf_dsnlasthop))
2327 {
2328 sx->dsn_all_lasthop = FALSE;
2329 break;
2330 }
2331 }
2332
2333/* Add any DSN flags to the mail command */
2334
2335if (sx->peer_offered & PEER_OFFERED_DSN && !sx->dsn_all_lasthop)
2336 {
2337 if (dsn_ret == dsn_ret_hdrs)
2338 { Ustrcpy(p, " RET=HDRS"); p += 9; }
2339 else if (dsn_ret == dsn_ret_full)
2340 { Ustrcpy(p, " RET=FULL"); p += 9; }
2341
2342 if (dsn_envid)
2343 {
2344 string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ENVID=%s", dsn_envid);
2345 while (*p) p++;
2346 }
2347 }
2348
2349/* If an authenticated_sender override has been specified for this transport
2350instance, expand it. If the expansion is forced to fail, and there was already
2351an authenticated_sender for this message, the original value will be used.
2352Other expansion failures are serious. An empty result is ignored, but there is
2353otherwise no check - this feature is expected to be used with LMTP and other
2354cases where non-standard addresses (e.g. without domains) might be required. */
2355
2356if (smtp_mail_auth_str(p, sizeof(sx->buffer) - (p-sx->buffer), addrlist, sx->ob))
2357 return ERROR;
2358
2359return OK;
2360}
2361
2362
2363static void
2364build_rcptcmd_options(smtp_context * sx, const address_item * addr)
2365{
2366uschar * p = sx->buffer;
2367*p = 0;
2368
2369/* Add any DSN flags to the rcpt command */
2370
2371if (sx->peer_offered & PEER_OFFERED_DSN && !(addr->dsn_flags & rf_dsnlasthop))
2372 {
2373 if (addr->dsn_flags & rf_dsnflags)
2374 {
2375 int i;
2376 BOOL first = TRUE;
2377
2378 Ustrcpy(p, " NOTIFY=");
2379 while (*p) p++;
2380 for (i = 0; i < nelem(rf_list); i++) if (addr->dsn_flags & rf_list[i])
2381 {
2382 if (!first) *p++ = ',';
2383 first = FALSE;
2384 Ustrcpy(p, rf_names[i]);
2385 while (*p) p++;
2386 }
2387 }
2388
2389 if (addr->dsn_orcpt)
2390 {
2391 string_format(p, sizeof(sx->buffer) - (p-sx->buffer), " ORCPT=%s",
2392 addr->dsn_orcpt);
2393 while (*p) p++;
2394 }
2395 }
2396}
2397
2398
d9c3c8ed
JH
2399
2400/*
2401Return:
e9166683
JH
2402 0 good, rcpt results in addr->transport_return (PENDING_OK, DEFER, FAIL)
2403 -1 MAIL response error
2404 -2 any non-MAIL read i/o error
2405 -3 non-MAIL response timeout
2406 -4 internal error; channel still usable
2407 -5 transmit failed
d9c3c8ed
JH
2408 */
2409
2410int
2411smtp_write_mail_and_rcpt_cmds(smtp_context * sx, int * yield)
2412{
2413address_item * addr;
2414int address_count;
2415int rc;
2416
2417if (build_mailcmd_options(sx, sx->first_addr) != OK)
2418 {
2419 *yield = ERROR;
e9166683 2420 return -4;
d9c3c8ed
JH
2421 }
2422
2423/* From here until we send the DATA command, we can make use of PIPELINING
2424if the server host supports it. The code has to be able to check the responses
2425at any point, for when the buffer fills up, so we write it totally generally.
2426When PIPELINING is off, each command written reports that it has flushed the
2427buffer. */
2428
2429sx->pending_MAIL = TRUE; /* The block starts with MAIL */
2430
2431 {
2432 uschar * s = sx->from_addr;
2433#ifdef SUPPORT_I18N
2434 uschar * errstr = NULL;
2435
2436 /* If we must downconvert, do the from-address here. Remember we had to
2437 for the to-addresses (done below), and also (ugly) for re-doing when building
2438 the delivery log line. */
2439
2440 if ( sx->addrlist->prop.utf8_msg
2441 && (sx->addrlist->prop.utf8_downcvt || !(sx->peer_offered & PEER_OFFERED_UTF8))
2442 )
2443 {
2444 if (s = string_address_utf8_to_alabel(s, &errstr), errstr)
2445 {
2446 set_errno_nohost(sx->addrlist, ERRNO_EXPANDFAIL, errstr, DEFER, FALSE);
2447 *yield = ERROR;
e9166683 2448 return -4;
d9c3c8ed
JH
2449 }
2450 setflag(sx->addrlist, af_utf8_downcvt);
2451 }
2452#endif
2453
4e910c01 2454 rc = smtp_write_command(&sx->outblock, pipelining_active ? SCMD_BUFFER : SCMD_FLUSH,
d9c3c8ed
JH
2455 "MAIL FROM:<%s>%s\r\n", s, sx->buffer);
2456 }
2457
2458mail_command = string_copy(big_buffer); /* Save for later error message */
2459
2460switch(rc)
2461 {
2462 case -1: /* Transmission error */
e9166683 2463 return -5;
d9c3c8ed 2464
df5b41e3 2465 case +1: /* Cmd was sent */
d9c3c8ed
JH
2466 if (!smtp_read_response(&sx->inblock, sx->buffer, sizeof(sx->buffer), '2',
2467 sx->ob->command_timeout))
2468 {
2469 if (errno == 0 && sx->buffer[0] == '4')
2470 {
2471 errno = ERRNO_MAIL4XX;
2472 sx->addrlist->more_errno |= ((sx->buffer[1] - '0')*10 + sx->buffer[2] - '0') << 8;
2473 }
2474 return -1;
2475 }
2476 sx->pending_MAIL = FALSE;
2477 break;
e9166683
JH
2478
2479 /* otherwise zero: command queued for pipeline */
d9c3c8ed
JH
2480 }
2481
2482/* Pass over all the relevant recipient addresses for this host, which are the
2483ones that have status PENDING_DEFER. If we are using PIPELINING, we can send
2484several before we have to read the responses for those seen so far. This
2485checking is done by a subroutine because it also needs to be done at the end.
2486Send only up to max_rcpt addresses at a time, leaving next_addr pointing to
2487the next one if not all are sent.
2488
2489In the MUA wrapper situation, we want to flush the PIPELINING buffer for the
2490last address because we want to abort if any recipients have any kind of
2491problem, temporary or permanent. We know that all recipient addresses will have
2492the PENDING_DEFER status, because only one attempt is ever made, and we know
e9166683
JH
2493that max_rcpt will be large, so all addresses will be done at once.
2494
2495For verify we flush the pipeline after any (the only) rcpt address. */
d9c3c8ed
JH
2496
2497for (addr = sx->first_addr, address_count = 0;
2498 addr && address_count < sx->max_rcpt;
2499 addr = addr->next) if (addr->transport_return == PENDING_DEFER)
2500 {
2501 int count;
2502 BOOL no_flush;
2503 uschar * rcpt_addr;
2504
2505 addr->dsn_aware = sx->peer_offered & PEER_OFFERED_DSN
2506 ? dsn_support_yes : dsn_support_no;
2507
2508 address_count++;
4c2471ca
JH
2509 no_flush = pipelining_active && !sx->verify
2510 && (!mua_wrapper || addr->next && address_count < sx->max_rcpt);
d9c3c8ed
JH
2511
2512 build_rcptcmd_options(sx, addr);
2513
2514 /* Now send the RCPT command, and process outstanding responses when
2515 necessary. After a timeout on RCPT, we just end the function, leaving the
2516 yield as OK, because this error can often mean that there is a problem with
2517 just one address, so we don't want to delay the host. */
2518
2519 rcpt_addr = transport_rcpt_address(addr, sx->tblock->rcpt_include_affixes);
2520
2521#ifdef SUPPORT_I18N
2522 if ( testflag(sx->addrlist, af_utf8_downcvt)
2523 && !(rcpt_addr = string_address_utf8_to_alabel(rcpt_addr, NULL))
2524 )
2525 {
2526 /*XXX could we use a per-address errstr here? Not fail the whole send? */
2527 errno = ERRNO_EXPANDFAIL;
e9166683 2528 return -5; /*XXX too harsh? */
d9c3c8ed
JH
2529 }
2530#endif
2531
4e910c01
JH
2532 count = smtp_write_command(&sx->outblock, no_flush ? SCMD_BUFFER : SCMD_FLUSH,
2533 "RCPT TO:<%s>%s%s\r\n", rcpt_addr, sx->igquotstr, sx->buffer);
d9c3c8ed 2534
e9166683 2535 if (count < 0) return -5;
d9c3c8ed
JH
2536 if (count > 0)
2537 {
df5b41e3 2538 switch(sync_responses(sx, count, 0))
d9c3c8ed
JH
2539 {
2540 case 3: sx->ok = TRUE; /* 2xx & 5xx => OK & progress made */
2541 case 2: sx->completed_addr = TRUE; /* 5xx (only) => progress made */
e9166683 2542 break;
d9c3c8ed
JH
2543
2544 case 1: sx->ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
2545 if (!sx->lmtp) /* can't tell about progress yet */
2546 sx->completed_addr = TRUE;
2547 case 0: /* No 2xx or 5xx, but no probs */
2548 break;
2549
e9166683
JH
2550 case -1: return -3; /* Timeout on RCPT */
2551 case -2: return -2; /* non-MAIL read i/o error */
2552 default: return -1; /* any MAIL error */
d9c3c8ed
JH
2553 }
2554 sx->pending_MAIL = FALSE; /* Dealt with MAIL */
2555 }
2556 } /* Loop for next address */
2557
2558sx->next_addr = addr;
2559return 0;
2560}
2561
2562
875512a3
JH
2563#ifdef SUPPORT_TLS
2564/*****************************************************
2565* Proxy TLS connection for another transport process *
2566******************************************************/
2567/*
57cc2785
JH
2568Use the given buffer as a staging area, and select on both the given fd
2569and the TLS'd client-fd for data to read (per the coding in ip_recv() and
875512a3
JH
2570fd_ready() this is legitimate). Do blocking full-size writes, and reads
2571under a timeout.
2572
2573Arguments:
57cc2785
JH
2574 buf space to use for buffering
2575 bufsiz size of buffer
875512a3
JH
2576 proxy_fd comms to proxied process
2577 timeout per-read timeout, seconds
2578*/
2579
57cc2785
JH
2580void
2581smtp_proxy_tls(uschar * buf, size_t bsize, int proxy_fd, int timeout)
875512a3 2582{
e47252f5 2583fd_set rfds, efds;
875512a3
JH
2584int max_fd = MAX(proxy_fd, tls_out.active) + 1;
2585int rc, i, fd_bits, nbytes;
2586
2587set_process_info("proxying TLS connection for continued transport");
e47252f5
JH
2588FD_ZERO(&rfds);
2589FD_SET(tls_out.active, &rfds);
2590FD_SET(proxy_fd, &rfds);
875512a3
JH
2591
2592for (fd_bits = 3; fd_bits; )
2593 {
2594 time_t time_left = timeout;
2595 time_t time_start = time(NULL);
2596
2597 /* wait for data */
e47252f5 2598 efds = rfds;
875512a3
JH
2599 do
2600 {
2601 struct timeval tv = { time_left, 0 };
2602
e47252f5
JH
2603 rc = select(max_fd,
2604 (SELECT_ARG2_TYPE *)&rfds, NULL, (SELECT_ARG2_TYPE *)&efds, &tv);
875512a3
JH
2605
2606 if (rc < 0 && errno == EINTR)
2607 if ((time_left -= time(NULL) - time_start) > 0) continue;
2608
2609 if (rc <= 0)
2610 {
2611 DEBUG(D_transport) if (rc == 0) debug_printf("%s: timed out\n", __FUNCTION__);
2612 return;
2613 }
e47252f5
JH
2614
2615 if (FD_ISSET(tls_out.active, &efds) || FD_ISSET(proxy_fd, &efds))
2616 {
2617 DEBUG(D_transport) debug_printf("select: exceptional cond on %s fd\n",
2618 FD_ISSET(proxy_fd, &efds) ? "proxy" : "tls");
2619 return;
2620 }
875512a3 2621 }
e47252f5 2622 while (rc < 0 || !(FD_ISSET(tls_out.active, &rfds) || FD_ISSET(proxy_fd, &rfds)));
875512a3
JH
2623
2624 /* handle inbound data */
e47252f5 2625 if (FD_ISSET(tls_out.active, &rfds))
57cc2785 2626 if ((rc = tls_read(FALSE, buf, bsize)) <= 0)
875512a3
JH
2627 {
2628 fd_bits &= ~1;
e47252f5 2629 FD_CLR(tls_out.active, &rfds);
875512a3 2630 shutdown(proxy_fd, SHUT_WR);
e47252f5 2631 timeout = 5;
875512a3
JH
2632 }
2633 else
2634 {
2635 for (nbytes = 0; rc - nbytes > 0; nbytes += i)
57cc2785 2636 if ((i = write(proxy_fd, buf + nbytes, rc - nbytes)) < 0) return;
875512a3
JH
2637 }
2638 else if (fd_bits & 1)
e47252f5 2639 FD_SET(tls_out.active, &rfds);
875512a3
JH
2640
2641 /* handle outbound data */
e47252f5 2642 if (FD_ISSET(proxy_fd, &rfds))
57cc2785 2643 if ((rc = read(proxy_fd, buf, bsize)) <= 0)
875512a3 2644 {
e47252f5
JH
2645 fd_bits = 0;
2646 tls_close(FALSE, TRUE);
875512a3
JH
2647 }
2648 else
2649 {
2650 for (nbytes = 0; rc - nbytes > 0; nbytes += i)
925ac8e4
JH
2651 if ((i = tls_write(FALSE, buf + nbytes, rc - nbytes, FALSE)) < 0)
2652 return;
875512a3
JH
2653 }
2654 else if (fd_bits & 2)
e47252f5 2655 FD_SET(proxy_fd, &rfds);
875512a3
JH
2656 }
2657}
2658#endif
2659
2660
d093f8e5
JH
2661/*************************************************
2662* Deliver address list to given host *
2663*************************************************/
2664
2665/* If continue_hostname is not null, we get here only when continuing to
2666deliver down an existing channel. The channel was passed as the standard
2667input. TLS is never active on a passed channel; the previous process always
2668closes it down before passing the connection on.
2669
2670Otherwise, we have to make a connection to the remote host, and do the
2671initial protocol exchange.
2672
2673When running as an MUA wrapper, if the sender or any recipient is rejected,
2674temporarily or permanently, we force failure for all recipients.
2675
2676Arguments:
2677 addrlist chain of potential addresses to deliver; only those whose
2678 transport_return field is set to PENDING_DEFER are currently
2679 being processed; others should be skipped - they have either
2680 been delivered to an earlier host or IP address, or been
2681 failed by one of them.
2682 host host to deliver to
2683 host_af AF_INET or AF_INET6
a843a57e
JH
2684 defport default TCP/IP port to use if host does not specify, in host
2685 byte order
d093f8e5
JH
2686 interface interface to bind to, or NULL
2687 tblock transport instance block
2688 message_defer set TRUE if yield is OK, but all addresses were deferred
2689 because of a non-recipient, non-host failure, that is, a
2690 4xx response to MAIL FROM, DATA, or ".". This is a defer
2691 that is specific to the message.
2692 suppress_tls if TRUE, don't attempt a TLS connection - this is set for
2693 a second attempt after TLS initialization fails
2694
2695Returns: OK - the connection was made and the delivery attempted;
2696 the result for each address is in its data block.
2697 DEFER - the connection could not be made, or something failed
2698 while setting up the SMTP session, or there was a
2699 non-message-specific error, such as a timeout.
2700 ERROR - a filter command is specified for this transport,
2701 and there was a problem setting it up; OR helo_data
2702 or add_headers or authenticated_sender is specified
2703 for this transport, and the string failed to expand
2704*/
2705
2706static int
a843a57e 2707smtp_deliver(address_item *addrlist, host_item *host, int host_af, int defport,
d093f8e5
JH
2708 uschar *interface, transport_instance *tblock,
2709 BOOL *message_defer, BOOL suppress_tls)
2710{
2711address_item *addr;
d093f8e5 2712int yield = OK;
d093f8e5
JH
2713int save_errno;
2714int rc;
2715time_t start_delivery_time = time(NULL);
2716
d093f8e5
JH
2717BOOL pass_message = FALSE;
2718uschar *message = NULL;
2719uschar new_message_id[MESSAGE_ID_LENGTH + 1];
2720uschar *p;
2721
2722smtp_context sx;
2723
2724suppress_tls = suppress_tls; /* stop compiler warning when no TLS support */
02b41d71 2725*message_defer = FALSE;
d093f8e5
JH
2726
2727sx.addrlist = addrlist;
2728sx.host = host;
2729sx.host_af = host_af,
a843a57e 2730sx.port = defport;
d093f8e5 2731sx.interface = interface;
02b41d71 2732sx.helo_data = NULL;
d093f8e5 2733sx.tblock = tblock;
e9166683 2734sx.verify = FALSE;
d093f8e5 2735
9be4572b
JH
2736/* Get the channel set up ready for a message (MAIL FROM being the next
2737SMTP command to send */
2738
e9166683 2739if ((rc = smtp_setup_conn(&sx, suppress_tls)) != OK)
d093f8e5
JH
2740 return rc;
2741
0756eb3c
PH
2742/* If there is a filter command specified for this transport, we can now
2743set it up. This cannot be done until the identify of the host is known. */
2744
e9166683 2745if (tblock->filter_command)
0756eb3c 2746 {
9b989985 2747 transport_filter_timeout = tblock->filter_timeout;
0756eb3c
PH
2748
2749 /* On failure, copy the error to all addresses, abandon the SMTP call, and
2750 yield ERROR. */
2751
36d295f1
JH
2752 if (!transport_set_up_command(&transport_filter_argv,
2753 tblock->filter_command, TRUE, DEFER, addrlist,
2754 string_sprintf("%.50s transport", tblock->name), NULL))
0756eb3c 2755 {
895fbaf2
JH
2756 set_errno_nohost(addrlist->next, addrlist->basic_errno, addrlist->message, DEFER,
2757 FALSE);
0756eb3c
PH
2758 yield = ERROR;
2759 goto SEND_QUIT;
2760 }
48f1c853
JH
2761
2762 if ( transport_filter_argv
2763 && *transport_filter_argv
2764 && **transport_filter_argv
d093f8e5 2765 && sx.peer_offered & PEER_OFFERED_CHUNKING
48f1c853
JH
2766 )
2767 {
d093f8e5 2768 sx.peer_offered &= ~PEER_OFFERED_CHUNKING;
48f1c853
JH
2769 DEBUG(D_transport) debug_printf("CHUNKING not usable due to transport filter\n");
2770 }
0756eb3c
PH
2771 }
2772
36d295f1 2773sx.first_addr = addrlist;
0756eb3c
PH
2774
2775/* For messages that have more than the maximum number of envelope recipients,
2776we want to send several transactions down the same SMTP connection. (See
2777comments in deliver.c as to how this reconciles, heuristically, with
2778remote_max_parallel.) This optimization was added to Exim after the following
2779code was already working. The simplest way to put it in without disturbing the
2780code was to use a goto to jump back to this point when there is another
2781transaction to handle. */
2782
2783SEND_MESSAGE:
d9c3c8ed 2784sx.from_addr = return_path;
36d295f1 2785sx.sync_addr = sx.first_addr;
d093f8e5
JH
2786sx.ok = FALSE;
2787sx.send_rset = TRUE;
d9c3c8ed 2788sx.completed_addr = FALSE;
0756eb3c
PH
2789
2790
57cc2785
JH
2791/* If we are a continued-connection-after-verify the MAIL and RCPT
2792commands were already sent; do not re-send but do mark the addrs as
2793having been accepted up to RCPT stage. A traditional cont-conn
2794always has a sequence number greater than one. */
6b62e899 2795
57cc2785 2796if (continue_hostname && continue_sequence == 1)
0756eb3c 2797 {
57cc2785 2798 address_item * addr;
0756eb3c 2799
57cc2785 2800 sx.peer_offered = smtp_peer_options;
d8b8dd15 2801 sx.pending_MAIL = FALSE;
57cc2785
JH
2802 sx.ok = TRUE;
2803 sx.next_addr = NULL;
0756eb3c 2804
57cc2785
JH
2805 for (addr = addrlist; addr; addr = addr->next)
2806 addr->transport_return = PENDING_OK;
2807 }
2808else
0756eb3c 2809 {
57cc2785
JH
2810 /* Initiate a message transfer. */
2811
2812 switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield))
2813 {
2814 case 0: break;
2815 case -1: case -2: goto RESPONSE_FAILED;
2816 case -3: goto END_OFF;
2817 case -4: goto SEND_QUIT;
2818 default: goto SEND_FAILED;
2819 }
2820
2821 /* If we are an MUA wrapper, abort if any RCPTs were rejected, either
2822 permanently or temporarily. We should have flushed and synced after the last
2823 RCPT. */
2824
2825 if (mua_wrapper)
2826 {
4c2471ca
JH
2827 address_item * a;
2828 unsigned cnt;
2829
2830 for (a = sx.first_addr, cnt = 0; a && cnt < sx.max_rcpt; a = a->next, cnt++)
2831 if (a->transport_return != PENDING_OK)
57cc2785
JH
2832 {
2833 /*XXX could we find a better errno than 0 here? */
4c2471ca
JH
2834 set_errno_nohost(addrlist, 0, a->message, FAIL,
2835 testflag(a, af_pass_message));
57cc2785
JH
2836 sx.ok = FALSE;
2837 break;
2838 }
2839 }
0756eb3c
PH
2840 }
2841
2842/* If ok is TRUE, we know we have got at least one good recipient, and must now
2843send DATA, but if it is FALSE (in the normal, non-wrapper case), we may still
2844have a good recipient buffered up if we are pipelining. We don't want to waste
2845time sending DATA needlessly, so we only send it if either ok is TRUE or if we
6d5c916c
JH
2846are pipelining. The responses are all handled by sync_responses().
2847If using CHUNKING, do not send a BDAT until we know how big a chunk we want
2848to send is. */
0756eb3c 2849
d093f8e5
JH
2850if ( !(sx.peer_offered & PEER_OFFERED_CHUNKING)
2851 && (sx.ok || (pipelining_active && !mua_wrapper)))
0756eb3c 2852 {
4e910c01 2853 int count = smtp_write_command(&sx.outblock, SCMD_FLUSH, "DATA\r\n");
6d5c916c 2854
0756eb3c 2855 if (count < 0) goto SEND_FAILED;
df5b41e3 2856 switch(sync_responses(&sx, count, sx.ok ? +1 : -1))
0756eb3c 2857 {
d093f8e5 2858 case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */
d9c3c8ed 2859 case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */
0756eb3c
PH
2860 break;
2861
d093f8e5 2862 case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
d9c3c8ed 2863 if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */
0756eb3c
PH
2864 case 0: break; /* No 2xx or 5xx, but no probs */
2865
2866 case -1: goto END_OFF; /* Timeout on RCPT */
2867 default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */
2868 }
0d9fa8c0 2869 pipelining_active = FALSE;
87cb4a16 2870 data_command = string_copy(big_buffer); /* Save for later error message */
0756eb3c
PH
2871 }
2872
0756eb3c
PH
2873/* If there were no good recipients (but otherwise there have been no
2874problems), just set ok TRUE, since we have handled address-specific errors
2875already. Otherwise, it's OK to send the message. Use the check/escape mechanism
2876for handling the SMTP dot-handling protocol, flagging to apply to headers as
2877well as body. Set the appropriate timeout value to be used for each chunk.
2878(Haven't been able to make it work using select() for writing yet.) */
2879
d093f8e5 2880if (!(sx.peer_offered & PEER_OFFERED_CHUNKING) && !sx.ok)
6d5c916c
JH
2881 {
2882 /* Save the first address of the next batch. */
d9c3c8ed 2883 sx.first_addr = sx.next_addr;
6d5c916c 2884
d093f8e5 2885 sx.ok = TRUE;
6d5c916c 2886 }
ff5aac2b 2887else
0756eb3c 2888 {
6b46ecc6 2889 transport_ctx tctx = {
42055a33 2890 sx.inblock.sock,
6b46ecc6
JH
2891 tblock,
2892 addrlist,
2893 US".", US"..", /* Escaping strings */
65de12cc 2894 topt_use_crlf | topt_escape_headers
6b46ecc6
JH
2895 | (tblock->body_only ? topt_no_headers : 0)
2896 | (tblock->headers_only ? topt_no_body : 0)
2897 | (tblock->return_path_add ? topt_add_return_path : 0)
2898 | (tblock->delivery_date_add ? topt_add_delivery_date : 0)
2899 | (tblock->envelope_to_add ? topt_add_envelope_to : 0)
2900 };
2901
6d5c916c
JH
2902 /* If using CHUNKING we need a callback from the generic transport
2903 support to us, for the sending of BDAT smtp commands and the reaping
2904 of responses. The callback needs a whole bunch of state so set up
2905 a transport-context structure to be passed around. */
2906
d093f8e5 2907 if (sx.peer_offered & PEER_OFFERED_CHUNKING)
59932f7d 2908 {
65de12cc 2909 tctx.check_string = tctx.escape_string = NULL;
6d5c916c
JH
2910 tctx.options |= topt_use_bdat;
2911 tctx.chunk_cb = smtp_chunk_cmd_callback;
e9166683
JH
2912 sx.pending_BDAT = FALSE;
2913 sx.good_RCPT = sx.ok;
2914 sx.cmd_count = 0;
2915 tctx.smtp_context = &sx;
59932f7d
JH
2916 }
2917 else
65de12cc 2918 tctx.options |= topt_end_dot;
59932f7d 2919
6d5c916c 2920 /* Save the first address of the next batch. */
d9c3c8ed 2921 sx.first_addr = sx.next_addr;
6d5c916c 2922
e027f545
JH
2923 /* Responses from CHUNKING commands go in buffer. Otherwise,
2924 there has not been a response. */
2925
d093f8e5 2926 sx.buffer[0] = 0;
e027f545 2927
0756eb3c 2928 sigalrm_seen = FALSE;
d093f8e5 2929 transport_write_timeout = sx.ob->data_timeout;
0756eb3c
PH
2930 smtp_command = US"sending data block"; /* For error messages */
2931 DEBUG(D_transport|D_v)
d093f8e5 2932 if (sx.peer_offered & PEER_OFFERED_CHUNKING)
6d5c916c
JH
2933 debug_printf(" will write message using CHUNKING\n");
2934 else
2935 debug_printf(" SMTP>> writing message and terminating \".\"\n");
0756eb3c 2936 transport_count = 0;
a7538db1 2937
80a47a2c 2938#ifndef DISABLE_DKIM
42055a33 2939 sx.ok = dkim_transport_write_message(&tctx, &sx.ob->dkim, CUSS &message);
4cd12fe9 2940#else
42055a33 2941 sx.ok = transport_write_message(&tctx, 0);
4cd12fe9 2942#endif
0756eb3c
PH
2943
2944 /* transport_write_message() uses write() because it is called from other
2945 places to write to non-sockets. This means that under some OS (e.g. Solaris)
2946 it can exit with "Broken pipe" as its error. This really means that the
2947 socket got closed at the far end. */
2948
2949 transport_write_timeout = 0; /* for subsequent transports */
2950
2951 /* Failure can either be some kind of I/O disaster (including timeout),
e027f545
JH
2952 or the failure of a transport filter or the expansion of added headers.
2953 Or, when CHUNKING, it can be a protocol-detected failure. */
0756eb3c 2954
d093f8e5 2955 if (!sx.ok)
b9df1829
JH
2956 if (message) goto SEND_FAILED;
2957 else goto RESPONSE_FAILED;
0756eb3c
PH
2958
2959 /* We used to send the terminating "." explicitly here, but because of
2960 buffering effects at both ends of TCP/IP connections, you don't gain
2961 anything by keeping it separate, so it might as well go in the final
2962 data buffer for efficiency. This is now done by setting the topt_end_dot
2963 flag above. */
2964
2965 smtp_command = US"end of data";
2966
e9166683 2967 if (sx.peer_offered & PEER_OFFERED_CHUNKING && sx.cmd_count > 1)
6d5c916c
JH
2968 {
2969 /* Reap any outstanding MAIL & RCPT commands, but not a DATA-go-ahead */
e9166683 2970 switch(sync_responses(&sx, sx.cmd_count-1, 0))
6d5c916c 2971 {
d093f8e5 2972 case 3: sx.ok = TRUE; /* 2xx & 5xx => OK & progress made */
d9c3c8ed 2973 case 2: sx.completed_addr = TRUE; /* 5xx (only) => progress made */
6d5c916c
JH
2974 break;
2975
d093f8e5 2976 case 1: sx.ok = TRUE; /* 2xx (only) => OK, but if LMTP, */
d9c3c8ed 2977 if (!sx.lmtp) sx.completed_addr = TRUE; /* can't tell about progress yet */
6d5c916c
JH
2978 case 0: break; /* No 2xx or 5xx, but no probs */
2979
2980 case -1: goto END_OFF; /* Timeout on RCPT */
2981 default: goto RESPONSE_FAILED; /* I/O error, or any MAIL/DATA error */
2982 }
2983 }
2984
8ccd00b1 2985#ifndef DISABLE_PRDR
fd98a5c6
JH
2986 /* For PRDR we optionally get a partial-responses warning
2987 * followed by the individual responses, before going on with
2988 * the overall response. If we don't get the warning then deal
2989 * with per non-PRDR. */
d093f8e5 2990 if(sx.prdr_active)
fd98a5c6 2991 {
d093f8e5
JH
2992 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '3',
2993 sx.ob->final_timeout);
2994 if (!sx.ok && errno == 0) switch(sx.buffer[0])
e027f545 2995 {
d093f8e5
JH
2996 case '2': sx.prdr_active = FALSE;
2997 sx.ok = TRUE;
e027f545
JH
2998 break;
2999 case '4': errno = ERRNO_DATA4XX;
3000 addrlist->more_errno |=
d093f8e5 3001 ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
e027f545
JH
3002 break;
3003 }
fd98a5c6
JH
3004 }
3005 else
3006#endif
3007
3008 /* For non-PRDR SMTP, we now read a single response that applies to the
3009 whole message. If it is OK, then all the addresses have been delivered. */
0756eb3c 3010
d093f8e5 3011 if (!sx.lmtp)
e97957bc 3012 {
d093f8e5
JH
3013 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
3014 sx.ob->final_timeout);
3015 if (!sx.ok && errno == 0 && sx.buffer[0] == '4')
e97957bc
PH
3016 {
3017 errno = ERRNO_DATA4XX;
d093f8e5 3018 addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
e97957bc
PH
3019 }
3020 }
0756eb3c
PH
3021
3022 /* For LMTP, we get back a response for every RCPT command that we sent;
3023 some may be accepted and some rejected. For those that get a response, their
3024 status is fixed; any that are accepted have been handed over, even if later
3025 responses crash - at least, that's how I read RFC 2033.
3026
3027 If all went well, mark the recipient addresses as completed, record which
3028 host/IPaddress they were delivered to, and cut out RSET when sending another
3029 message down the same channel. Write the completed addresses to the journal
3030 now so that they are recorded in case there is a crash of hardware or
3031 software before the spool gets updated. Also record the final SMTP
3032 confirmation if needed (for SMTP only). */
3033
d093f8e5 3034 if (sx.ok)
0756eb3c
PH
3035 {
3036 int flag = '=';
3037 int delivery_time = (int)(time(NULL) - start_delivery_time);
3038 int len;
0756eb3c 3039 uschar *conf = NULL;
0d9fa8c0 3040
d093f8e5 3041 sx.send_rset = FALSE;
0d9fa8c0 3042 pipelining_active = FALSE;
0756eb3c 3043
0756eb3c
PH
3044 /* Set up confirmation if needed - applies only to SMTP */
3045
d68218c7 3046 if (
0cbf2b82 3047#ifdef DISABLE_EVENT
6c6d6e48 3048 LOGGING(smtp_confirmation) &&
a7538db1 3049#endif
d093f8e5 3050 !sx.lmtp
d68218c7 3051 )
0756eb3c 3052 {
d093f8e5 3053 const uschar *s = string_printing(sx.buffer);
55414b25 3054 /* deconst cast ok here as string_printing was checked to have alloc'n'copied */
d093f8e5 3055 conf = (s == sx.buffer)? (uschar *)string_copy(s) : US s;
0756eb3c
PH
3056 }
3057
fd98a5c6 3058 /* Process all transported addresses - for LMTP or PRDR, read a status for
0756eb3c
PH
3059 each one. */
3060
d9c3c8ed 3061 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
0756eb3c
PH
3062 {
3063 if (addr->transport_return != PENDING_OK) continue;
3064
3065 /* LMTP - if the response fails badly (e.g. timeout), use it for all the
3066 remaining addresses. Otherwise, it's a return code for just the one
75def545
PH
3067 address. For temporary errors, add a retry item for the address so that
3068 it doesn't get tried again too soon. */
0756eb3c 3069
8ccd00b1 3070#ifndef DISABLE_PRDR
d093f8e5 3071 if (sx.lmtp || sx.prdr_active)
fd98a5c6 3072#else
d093f8e5 3073 if (sx.lmtp)
fd98a5c6 3074#endif
0756eb3c 3075 {
d093f8e5
JH
3076 if (!smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
3077 sx.ob->final_timeout))
0756eb3c 3078 {
d093f8e5 3079 if (errno != 0 || sx.buffer[0] == 0) goto RESPONSE_FAILED;
fd98a5c6 3080 addr->message = string_sprintf(
8ccd00b1 3081#ifndef DISABLE_PRDR
d093f8e5 3082 "%s error after %s: %s", sx.prdr_active ? "PRDR":"LMTP",
fd98a5c6
JH
3083#else
3084 "LMTP error after %s: %s",
3085#endif
d093f8e5 3086 data_command, string_printing(sx.buffer));
75def545 3087 setflag(addr, af_pass_message); /* Allow message to go to user */
d093f8e5 3088 if (sx.buffer[0] == '5')
75def545
PH
3089 addr->transport_return = FAIL;
3090 else
3091 {
e97957bc 3092 errno = ERRNO_DATA4XX;
d093f8e5 3093 addr->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
75def545 3094 addr->transport_return = DEFER;
8ccd00b1 3095#ifndef DISABLE_PRDR
d093f8e5 3096 if (!sx.prdr_active)
fd98a5c6
JH
3097#endif
3098 retry_add_item(addr, addr->address_retry_key, 0);
75def545 3099 }
0756eb3c
PH
3100 continue;
3101 }
d9c3c8ed 3102 sx.completed_addr = TRUE; /* NOW we can set this flag */
6c6d6e48 3103 if (LOGGING(smtp_confirmation))
c0ea85ab 3104 {
d093f8e5 3105 const uschar *s = string_printing(sx.buffer);
55414b25 3106 /* deconst cast ok here as string_printing was checked to have alloc'n'copied */
d093f8e5 3107 conf = (s == sx.buffer) ? US string_copy(s) : US s;
c0ea85ab 3108 }
0756eb3c
PH
3109 }
3110
3111 /* SMTP, or success return from LMTP for this address. Pass back the
2d280592 3112 actual host that was used. */
0756eb3c
PH
3113
3114 addr->transport_return = OK;
3115 addr->more_errno = delivery_time;
d427a7f9 3116 addr->host_used = host;
0756eb3c
PH
3117 addr->special_action = flag;
3118 addr->message = conf;
8ccd00b1 3119#ifndef DISABLE_PRDR
d093f8e5 3120 if (sx.prdr_active) addr->flags |= af_prdr_used;
fd98a5c6 3121#endif
d093f8e5 3122 if (sx.peer_offered & PEER_OFFERED_CHUNKING) addr->flags |= af_chunking_used;
0756eb3c
PH
3123 flag = '-';
3124
8ccd00b1 3125#ifndef DISABLE_PRDR
d093f8e5 3126 if (!sx.prdr_active)
fd98a5c6
JH
3127#endif
3128 {
3129 /* Update the journal. For homonymic addresses, use the base address plus
3130 the transport name. See lots of comments in deliver.c about the reasons
3131 for the complications when homonyms are involved. Just carry on after
3132 write error, as it may prove possible to update the spool file later. */
4d8d62b9 3133
fd98a5c6 3134 if (testflag(addr, af_homonym))
d093f8e5 3135 sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
fd98a5c6 3136 else
d093f8e5 3137 sprintf(CS sx.buffer, "%.500s\n", addr->unique);
4d8d62b9 3138
57cc2785 3139 DEBUG(D_deliver) debug_printf("S:journalling %s\n", sx.buffer);
d093f8e5
JH
3140 len = Ustrlen(CS sx.buffer);
3141 if (write(journal_fd, sx.buffer, len) != len)
fd98a5c6 3142 log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
d093f8e5 3143 "%s: %s", sx.buffer, strerror(errno));
fd98a5c6 3144 }
0756eb3c
PH
3145 }
3146
8ccd00b1 3147#ifndef DISABLE_PRDR
d093f8e5 3148 if (sx.prdr_active)
fd98a5c6
JH
3149 {
3150 /* PRDR - get the final, overall response. For any non-success
3151 upgrade all the address statuses. */
d093f8e5
JH
3152 sx.ok = smtp_read_response(&sx.inblock, sx.buffer, sizeof(sx.buffer), '2',
3153 sx.ob->final_timeout);
3154 if (!sx.ok)
fd98a5c6 3155 {
d093f8e5 3156 if(errno == 0 && sx.buffer[0] == '4')
fd98a5c6
JH
3157 {
3158 errno = ERRNO_DATA4XX;
d093f8e5 3159 addrlist->more_errno |= ((sx.buffer[1] - '0')*10 + sx.buffer[2] - '0') << 8;
fd98a5c6 3160 }
d9c3c8ed 3161 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
d093f8e5 3162 if (sx.buffer[0] == '5' || addr->transport_return == OK)
fd98a5c6
JH
3163 addr->transport_return = PENDING_OK; /* allow set_errno action */
3164 goto RESPONSE_FAILED;
3165 }
3166
3167 /* Update the journal, or setup retry. */
d9c3c8ed 3168 for (addr = addrlist; addr != sx.first_addr; addr = addr->next)
fd98a5c6 3169 if (addr->transport_return == OK)
9be4572b
JH
3170 {
3171 if (testflag(addr, af_homonym))
3172 sprintf(CS sx.buffer, "%.500s/%s\n", addr->unique + 3, tblock->name);
3173 else
3174 sprintf(CS sx.buffer, "%.500s\n", addr->unique);
3175
3176 DEBUG(D_deliver) debug_printf("journalling(PRDR) %s\n", sx.buffer);
3177 len = Ustrlen(CS sx.buffer);
3178 if (write(journal_fd, sx.buffer, len) != len)
3179 log_write(0, LOG_MAIN|LOG_PANIC, "failed to write journal for "
3180 "%s: %s", sx.buffer, strerror(errno));
3181 }
3182 else if (addr->transport_return == DEFER)
3183 retry_add_item(addr, addr->address_retry_key, -2);
fd98a5c6
JH
3184 }
3185#endif
3186
0756eb3c
PH
3187 /* Ensure the journal file is pushed out to disk. */
3188
54fc8428 3189 if (EXIMfsync(journal_fd) < 0)
0756eb3c
PH
3190 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
3191 strerror(errno));
3192 }
3193 }
3194
3195
3196/* Handle general (not specific to one address) failures here. The value of ok
3197is used to skip over this code on the falling through case. A timeout causes a
3198deferral. Other errors may defer or fail according to the response code, and
3199may set up a special errno value, e.g. after connection chopped, which is
3200assumed if errno == 0 and there is no text in the buffer. If control reaches
3201here during the setting up phase (i.e. before MAIL FROM) then always defer, as
3202the problem is not related to this specific message. */
3203
d093f8e5 3204if (!sx.ok)
0756eb3c 3205 {
895fbaf2
JH
3206 int code, set_rc;
3207 uschar * set_message;
0756eb3c
PH
3208
3209 RESPONSE_FAILED:
895fbaf2
JH
3210 {
3211 save_errno = errno;
3212 message = NULL;
d093f8e5
JH
3213 sx.send_quit = check_response(host, &save_errno, addrlist->more_errno,
3214 sx.buffer, &code, &message, &pass_message);
895fbaf2
JH
3215 goto FAILED;
3216 }
0756eb3c
PH
3217
3218 SEND_FAILED:
895fbaf2
JH
3219 {
3220 save_errno = errno;
3221 code = '4';
b9df1829