masqmail
view src/smtp_out.c @ 432:ddc05e12e307
Added tag 0.3.5 for changeset 34c919a8d74e
| author | markus schnalke <meillo@marmaro.de> |
|---|---|
| date | Sat, 07 Feb 2015 11:36:09 +0100 |
| parents | f122535c589e |
| children |
line source
1 /*
2 ** smtp_out.c
3 ** Copyright (C) 1999-2001 Oliver Kurth
4 ** Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
5 **
6 ** This program is free software; you can redistribute it and/or modify
7 ** it under the terms of the GNU General Public License as published by
8 ** the Free Software Foundation; either version 2 of the License, or
9 ** (at your option) any later version.
10 **
11 ** This program is distributed in the hope that it will be useful,
12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ** GNU General Public License for more details.
15 **
16 ** You should have received a copy of the GNU General Public License
17 ** along with this program; if not, write to the Free Software
18 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
21 /*
22 ** I always forget these rfc numbers:
23 ** RFC 821 (SMTP)
24 ** RFC 1869 (ESMTP)
25 ** RFC 1870 (ESMTP SIZE)
26 ** RFC 2197 (ESMTP PIPELINE)
27 ** RFC 2554 (ESMTP AUTH)
28 */
30 #include "masqmail.h"
31 #include "smtp_out.h"
32 #include "readsock.h"
34 #ifdef ENABLE_AUTH
35 #include "md5/md5.h"
36 #include "md5/hmac_md5.h"
37 #include "base64/base64.h"
38 #endif
40 void
41 destroy_smtpbase(smtp_base *psb)
42 {
43 fclose(psb->in);
44 fclose(psb->out);
46 close(psb->sock);
48 if (psb->helo_name)
49 g_free(psb->helo_name);
50 if (psb->buffer)
51 g_free(psb->buffer);
52 if (psb->auth_names)
53 g_strfreev(psb->auth_names);
55 if (psb->auth_name)
56 g_free(psb->auth_name);
57 if (psb->auth_login)
58 g_free(psb->auth_login);
59 if (psb->auth_secret)
60 g_free(psb->auth_secret);
61 }
63 gchar*
64 set_heloname(smtp_base *psb, gchar *default_name, gboolean do_correct)
65 {
66 struct sockaddr_in sname;
67 int len = sizeof(struct sockaddr_in);
68 struct hostent *host_entry;
70 if (do_correct) {
71 getsockname(psb->sock, (struct sockaddr *) (&sname), &len);
72 DEBUG(5) debugf("socket: name.sin_addr = %s\n", inet_ntoa(sname.sin_addr));
73 host_entry = gethostbyaddr((const char *) &(sname.sin_addr), sizeof(sname.sin_addr), AF_INET);
74 if (host_entry) {
75 psb->helo_name = g_strdup(host_entry->h_name);
76 } else {
77 /*
78 ** we failed to look up our own name. Instead of
79 ** giving our local hostname, we may give our IP
80 ** number to show the server that we are at least
81 ** willing to be honest. For the really picky ones.
82 */
83 DEBUG(5) debugf("failed to look up own host name.\n");
84 psb->helo_name = g_strdup_printf("[%s]", inet_ntoa(sname.sin_addr));
85 }
86 DEBUG(5) debugf("helo_name = %s\n", psb->helo_name);
87 }
88 if (psb->helo_name == NULL) {
89 psb->helo_name = g_strdup(default_name);
90 }
91 return psb->helo_name;
92 }
94 #ifdef ENABLE_AUTH
96 gboolean
97 set_auth(smtp_base *psb, gchar *name, gchar *login, gchar *secret)
98 {
99 if ((strcasecmp(name, "CRAM-MD5") == 0) || (strcasecmp(name, "LOGIN") == 0)) {
100 psb->auth_name = g_strdup(name);
101 psb->auth_login = g_strdup(login);
102 psb->auth_secret = g_strdup(secret);
104 return TRUE;
105 }
106 return FALSE;
107 }
109 #endif
111 static smtp_base*
112 create_smtpbase(gint sock)
113 {
114 gint dup_sock;
116 smtp_base *psb = (smtp_base *) g_malloc(sizeof(smtp_base));
118 psb->sock = sock;
120 psb->use_size = FALSE;
121 psb->use_pipelining = FALSE;
122 psb->use_auth = FALSE;
124 psb->max_size = 0;
125 psb->auth_names = NULL;
127 psb->buffer = (gchar *) g_malloc(SMTP_BUF_LEN);
129 dup_sock = dup(sock);
130 psb->out = fdopen(sock, "w");
131 psb->in = fdopen(dup_sock, "r");
133 psb->error = smtp_ok;
135 psb->helo_name = NULL;
137 psb->auth_name = psb->auth_login = psb->auth_secret = NULL;
139 return psb;
140 }
142 static gboolean
143 read_response(smtp_base *psb, int timeout)
144 {
145 gint buf_pos = 0;
146 gchar code[5];
147 gint i, len;
149 do {
150 len = read_sockline(psb->in, &(psb->buffer[buf_pos]), SMTP_BUF_LEN - buf_pos, timeout, READSOCKL_CHUG);
151 if (len == -3) {
152 psb->error = smtp_timeout;
153 return FALSE;
154 } else if (len == -2) {
155 psb->error = smtp_syntax;
156 return FALSE;
157 } else if (len == -1) {
158 psb->error = smtp_eof;
159 return FALSE;
160 }
161 for (i = 0; i < 4; i++)
162 code[i] = psb->buffer[buf_pos + i];
163 code[i] = '\0';
164 psb->last_code = atoi(code);
166 buf_pos += len;
168 } while (code[3] == '-');
169 if (psb->buffer) {
170 DEBUG(4) debugf("S: %s\n", psb->buffer);
171 }
173 return TRUE;
174 }
176 static gboolean
177 check_response(smtp_base *psb, gboolean after_data)
178 {
179 char c = psb->buffer[0];
181 if (((c == '2') && !after_data) || ((c == '3') && after_data)) {
182 psb->error = smtp_ok;
183 DEBUG(6) debugf("response OK:'%s' after_data = %d\n", psb->buffer, (int) after_data);
184 return TRUE;
185 } else {
186 if (c == '4')
187 psb->error = smtp_trylater;
188 else if (c == '5')
189 psb->error = smtp_fail;
190 else
191 psb->error = smtp_syntax;
192 DEBUG(6) debugf("response failure:'%s' after_data = %d\n", psb->buffer, (int) after_data);
193 return FALSE;
194 }
195 }
197 static gchar*
198 get_response_arg(gchar *response)
199 {
200 gchar buf[SMTP_BUF_LEN];
201 gchar *p = response, *q = buf;
203 while (*p && (*p != '\n') && isspace(*p))
204 p++;
205 if (*p && (*p != '\n')) {
206 while (*p && (*p != '\n') && (*p != '\r') && (q < buf + SMTP_BUF_LEN - 1))
207 *(q++) = *(p++);
208 *q = '\0';
209 return g_strdup(buf);
210 }
211 return NULL;
212 }
214 static gboolean
215 check_helo_response(smtp_base *psb)
216 {
217 gchar *ptr;
219 if (!check_response(psb, FALSE))
220 return FALSE;
222 if (psb->last_code == 220) {
223 logwrite(LOG_NOTICE, "received a 220 greeting after sending EHLO,\n");
224 logwrite(LOG_NOTICE, "please remove `instant_helo' from your route config\n");
225 /* read the next response, cause that's the actual helo response */
226 if (!read_response(psb, SMTP_CMD_TIMEOUT) || !check_response(psb, FALSE)) {
227 return FALSE;
228 }
229 }
231 ptr = psb->buffer;
233 while (*ptr) {
234 if (strncasecmp(&(ptr[4]), "SIZE", 4) == 0) {
235 gchar *arg;
236 psb->use_size = TRUE;
237 arg = get_response_arg(&(ptr[8]));
238 if (arg) {
239 psb->max_size = atoi(arg);
240 g_free(arg);
241 }
242 }
244 if (strncasecmp(&(ptr[4]), "PIPELINING", 10) == 0)
245 psb->use_pipelining = TRUE;
247 if (strncasecmp(&(ptr[4]), "AUTH", 4) == 0) {
248 if ((ptr[8] == ' ') || (ptr[8] == '=') || (ptr[8] == '\t')) { /* not sure about '\t' */
249 gchar *arg;
250 psb->use_auth = TRUE;
251 arg = get_response_arg(&(ptr[9])); /* after several years I finally learnt to count */
252 if (arg) {
253 psb->auth_names = g_strsplit(arg, " ", 0);
254 g_free(arg);
256 DEBUG(4) {
257 gint i = 0;
258 debugf("in check_helo_response()\n");
259 while (psb->auth_names[i]) {
260 debugf(" offered AUTH %s\n", psb->auth_names[i]);
261 i++;
262 }
263 }
264 }
265 }
266 }
268 while (*ptr != '\n')
269 ptr++;
270 ptr++;
271 }
273 DEBUG(4) {
274 debugf(" %s\n", psb->use_size ? "uses SIZE" : "no size");
275 debugf(" %s\n", psb->use_pipelining ? "uses PIPELINING" : "no pipelining");
276 debugf(" %s\n", psb->use_auth ? "uses AUTH" : "no auth");
277 }
279 return TRUE;
280 }
282 /*
283 ** We first try EHLO, but if it fails HELO in a second fall back try.
284 ** This is what is requested by RFC 2821 (sec 3.2):
285 **
286 ** Once the server has sent the welcoming message and
287 ** the client has received it, the client normally sends
288 ** the EHLO command to the server, [...]
289 ** For a particular connection attempt, if the server
290 ** returns a "command not recognized" response to EHLO,
291 ** the client SHOULD be able to fall back and send HELO.
292 **
293 ** Up to and including version 0.3.0 masqmail used ESMTP only if the
294 ** string ``ESMTP'' appeared within the server's greeting message. This
295 ** made it impossible to use AUTH with servers that would send odd
296 ** greeting messages.
297 */
298 static gboolean
299 smtp_helo(smtp_base *psb, gchar *helo)
300 {
301 fprintf(psb->out, "EHLO %s\r\n", helo);
302 fflush(psb->out);
303 DEBUG(4) debugf("C: EHLO %s\r\n", helo);
305 if (!read_response(psb, SMTP_CMD_TIMEOUT)) {
306 return FALSE;
307 }
308 if (check_helo_response(psb)) {
309 DEBUG(4) debugf("uses esmtp\n");
310 return TRUE;
311 }
313 if (psb->error != smtp_fail) {
314 return FALSE;
315 }
317 /*
318 ** our guess that server understands EHLO could have been wrong,
319 ** try again with HELO
320 */
322 fprintf(psb->out, "HELO %s\r\n", helo);
323 fflush(psb->out);
324 DEBUG(4) debugf("C: HELO %s\r\n", helo);
326 if (!read_response(psb, SMTP_CMD_TIMEOUT)) {
327 return FALSE;
328 }
329 if (check_helo_response(psb)) {
330 DEBUG(4) debugf("uses smtp\n");
331 return TRUE;
332 }
334 /* what sort of server ist THAT ?! give up... */
335 return FALSE;
336 }
338 static void
339 smtp_cmd_mailfrom(smtp_base *psb, address *return_path, guint size)
340 {
341 if (psb->use_size) {
342 fprintf(psb->out, "MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
343 fflush(psb->out);
345 DEBUG(4) debugf("C: MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
347 } else {
348 fprintf(psb->out, "MAIL FROM:%s\r\n", addr_string(return_path));
349 fflush(psb->out);
351 DEBUG(4) debugf("C: MAIL FROM:%s\r\n", addr_string(return_path));
352 }
353 }
355 static void
356 smtp_cmd_rcptto(smtp_base *psb, address *rcpt)
357 {
358 fprintf(psb->out, "RCPT TO:%s\r\n", addr_string(rcpt));
359 fflush(psb->out);
360 DEBUG(4) debugf("C: RCPT TO:%s\n", addr_string(rcpt));
361 }
363 static void
364 send_data_line(smtp_base *psb, gchar *data)
365 {
366 /*
367 ** According to RFC 821 each line should be terminated with CRLF.
368 ** Since a dot on a line itself marks the end of data, each line
369 ** beginning with a dot is prepended with another dot.
370 */
371 gchar *ptr;
372 gboolean new_line = TRUE; /* previous versions assumed that each item was exactly one line. This is no longer the case */
374 ptr = data;
375 while (*ptr) {
376 int c = (int) (*ptr);
377 if (c == '.' && new_line) {
378 /* dot-stuffing */
379 putc('.', psb->out);
380 }
381 if (c == '\n') {
382 /* CRLF line terminators */
383 putc('\r', psb->out);
384 putc('\n', psb->out);
385 new_line = TRUE;
386 } else {
387 putc(c, psb->out);
388 new_line = FALSE;
389 }
390 ptr++;
391 }
392 }
394 static void
395 send_header(smtp_base *psb, GList *hdr_list)
396 {
397 GList *node;
398 gint num_hdrs = 0;
400 /* header */
401 if (hdr_list) {
402 foreach(hdr_list, node) {
403 if (node->data) {
404 header *hdr = (header *) (node->data);
405 if (hdr->header) {
406 send_data_line(psb, hdr->header);
407 num_hdrs++;
408 }
409 }
410 }
411 }
413 /* empty line separating headers from data: */
414 putc('\r', psb->out);
415 putc('\n', psb->out);
417 DEBUG(4) debugf("sent %d headers\n", num_hdrs);
418 }
420 static void
421 send_data(smtp_base *psb, message *msg)
422 {
423 GList *node;
424 gint num_lines = 0;
426 /* data */
427 if (msg->data_list) {
428 for (node = g_list_first(msg->data_list); node; node = g_list_next(node)) {
429 if (node->data) {
430 send_data_line(psb, node->data);
431 num_lines++;
432 }
433 }
434 }
436 DEBUG(4) debugf("sent %d lines of data\n", num_lines);
438 fprintf(psb->out, ".\r\n");
439 fflush(psb->out);
440 DEBUG(4) debugf("C: .\n");
441 }
443 void
444 smtp_out_mark_rcpts(smtp_base *psb, GList *rcpt_list)
445 {
446 GList *rcpt_node;
447 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
448 address *rcpt = (address *) (rcpt_node->data);
450 addr_unmark_delivered(rcpt);
452 if ((psb->error == smtp_trylater) || (psb->error == smtp_timeout) || (psb->error == smtp_eof)) {
453 addr_mark_defered(rcpt);
454 } else {
455 addr_mark_failed(rcpt);
456 }
457 }
458 }
460 void
461 smtp_out_log_failure(smtp_base *psb, message *msg)
462 {
463 gchar *err_str;
465 if (psb->error == smtp_timeout)
466 err_str = g_strdup("connection timed out.");
467 else if (psb->error == smtp_eof)
468 err_str = g_strdup("connection terminated prematurely.");
469 else if (psb->error == smtp_syntax)
470 err_str = g_strdup_printf("got unexpected response: %s", psb->buffer);
471 else if (psb->error == smtp_cancel)
472 err_str = g_strdup("delivery was canceled.\n");
473 else
474 /* error message should still be in the buffer */
475 err_str = g_strdup_printf("failed: %s\n", psb->buffer);
477 if (msg == NULL)
478 logwrite(LOG_NOTICE, "host=%s %s\n", psb->remote_host, err_str);
479 else
480 logwrite(LOG_NOTICE, "%s == host=%s %s\n", msg->uid, psb->remote_host, err_str);
482 g_free(err_str);
483 }
485 smtp_base*
486 smtp_out_open(gchar *host, gint port, GList *resolve_list)
487 {
488 smtp_base *psb;
489 gint sock;
490 mxip_addr *addr;
492 DEBUG(5) debugf("smtp_out_open entered, host = %s\n", host);
494 if ((addr = connect_resolvelist(&sock, host, port, resolve_list))) {
495 /* create structure to hold status data: */
496 psb = create_smtpbase(sock);
497 psb->remote_host = addr->name;
499 DEBUG(5) {
500 struct sockaddr_in name;
501 int len = sizeof(struct sockaddr);
502 getsockname(sock, (struct sockaddr *) (&name), &len);
503 debugf("socket: name.sin_addr = %s\n", inet_ntoa(name.sin_addr));
504 }
505 return psb;
506 } else {
507 DEBUG(5) debugf("connect_resolvelist failed: %s %s\n", strerror(errno), hstrerror(h_errno));
508 }
510 return NULL;
511 }
513 smtp_base*
514 smtp_out_open_child(gchar *cmd)
515 {
516 smtp_base *psb;
517 gint sock;
519 DEBUG(5) debugf("smtp_out_open_child entered, cmd = %s\n", cmd);
520 sock = child(cmd);
521 if (sock <= 0) {
522 return NULL;
523 }
524 psb = create_smtpbase(sock);
525 psb->remote_host = NULL;
527 return psb;
528 }
530 gboolean
531 smtp_out_rset(smtp_base *psb)
532 {
533 gboolean ok;
535 fprintf(psb->out, "RSET\r\n");
536 fflush(psb->out);
537 DEBUG(4) debugf("C: RSET\n");
539 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
540 if (check_response(psb, FALSE))
541 return TRUE;
543 smtp_out_log_failure(psb, NULL);
545 return FALSE;
546 }
548 #ifdef ENABLE_AUTH
550 static gboolean
551 smtp_out_auth_cram_md5(smtp_base *psb)
552 {
553 gboolean ok = FALSE;
555 fprintf(psb->out, "C: AUTH CRAM-MD5\r\n");
556 fflush(psb->out);
557 DEBUG(4) debugf("AUTH CRAM-MD5\n");
558 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
559 if ((ok = check_response(psb, TRUE))) {
560 gchar *chall64 = get_response_arg(&(psb->buffer[4]));
561 gint chall_size;
562 gchar *chall = base64_decode(chall64, &chall_size);
563 guchar digest[16], *reply64, *reply;
564 gchar digest_string[33];
565 gint i;
567 DEBUG(5) debugf("smtp_out_auth_cram_md5():\n");
568 DEBUG(5) debugf(" encoded challenge = %s\n", chall64);
569 DEBUG(5) debugf(" decoded challenge = %s, size = %d\n", chall, chall_size);
570 DEBUG(5) debugf(" secret = %s\n", psb->auth_secret);
572 hmac_md5(chall, chall_size, psb->auth_secret, strlen(psb->auth_secret), digest);
573 for (i = 0; i < 16; i++)
574 sprintf(&(digest_string[i + i]), "%02x", (unsigned int) (digest[i]));
575 digest_string[32] = '\0';
577 DEBUG(5) debugf(" digest = %s\n", digest_string);
579 reply = g_strdup_printf("%s %s", psb->auth_login, digest_string);
580 DEBUG(5) debugf(" unencoded reply = %s\n", reply);
582 reply64 = base64_encode(reply, strlen(reply));
583 DEBUG(5) debugf(" encoded reply = %s\n", reply64);
585 fprintf(psb->out, "%s\r\n", reply64);
586 fflush(psb->out);
587 DEBUG(6) debugf(" reply64 = %s\n", reply64);
588 DEBUG(6) debugf("C: %s\n", reply64);
590 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
591 ok = check_response(psb, FALSE);
593 g_free(reply64);
594 g_free(reply);
595 g_free(chall);
596 g_free(chall64);
597 }
598 }
599 return ok;
600 }
602 static gboolean
603 smtp_out_auth_login(smtp_base *psb)
604 {
605 gboolean ok = FALSE;
606 fprintf(psb->out, "AUTH LOGIN\r\n");
607 fflush(psb->out);
608 DEBUG(4) debugf("C: AUTH LOGIN\r\n");
609 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
610 if ((ok = check_response(psb, TRUE))) {
611 gchar *resp64;
612 guchar *resp;
613 gint resp_size;
614 gchar *reply64;
616 DEBUG(5) debugf("smtp_out_auth_login():\n");
617 resp64 = get_response_arg(&(psb->buffer[4]));
618 DEBUG(5) debugf(" encoded response = `%s'\n", resp64);
619 resp = base64_decode(resp64, &resp_size);
620 g_free(resp64);
621 DEBUG(5) debugf(" decoded response = `%s', size = %d\n", resp, resp_size);
622 g_free(resp);
623 reply64 = base64_encode(psb->auth_login, strlen(psb->auth_login));
624 fprintf(psb->out, "%s\r\n", reply64);
625 fflush(psb->out);
626 DEBUG(6) debugf("C: %s\n", reply64);
627 g_free(reply64);
628 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
629 if ((ok = check_response(psb, TRUE))) {
630 resp64 = get_response_arg(&(psb->buffer[4]));
631 DEBUG(5) debugf(" encoded response = `%s'\n", resp64);
632 resp = base64_decode(resp64, &resp_size);
633 g_free(resp64);
634 DEBUG(5) debugf(" decoded response = `%s', size = %d\n", resp, resp_size);
635 g_free(resp);
636 reply64 = base64_encode(psb->auth_secret, strlen(psb->auth_secret));
637 fprintf(psb->out, "%s\r\n", reply64);
638 fflush(psb->out);
639 DEBUG(6) debugf("C: %s\n", reply64);
640 g_free(reply64);
641 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
642 ok = check_response(psb, FALSE);
643 }
644 }
645 }
646 }
647 return ok;
648 }
650 gboolean
651 smtp_out_auth(smtp_base *psb)
652 {
653 gboolean ok = FALSE;
654 gint i = 0;
655 while (psb->auth_names[i]) {
656 if (strcasecmp(psb->auth_names[i], psb->auth_name) == 0)
657 break;
658 i++;
659 }
660 if (psb->auth_names[i]) {
661 if (strcasecmp(psb->auth_name, "cram-md5") == 0) {
662 smtp_out_auth_cram_md5(psb);
663 } else if (strcasecmp(psb->auth_name, "login") == 0) {
664 smtp_out_auth_login(psb);
665 } else {
666 logwrite(LOG_ERR, "auth method %s not supported\n", psb->auth_name);
667 }
668 } else {
669 logwrite(LOG_ERR, "no auth method %s found.\n", psb->auth_name);
670 }
671 return ok;
672 }
674 #endif
676 gboolean
677 smtp_out_init(smtp_base *psb, gboolean instant_helo)
678 {
679 gboolean ok;
681 logwrite(LOG_INFO, "smtp_out_init(): instant_helo:%d\n", instant_helo);
683 if (!instant_helo) {
684 if ((ok = read_response(psb, SMTP_INITIAL_TIMEOUT))) {
685 ok = check_response(psb, FALSE);
686 }
687 if (!ok) {
688 smtp_out_log_failure(psb, NULL);
689 return ok;
690 }
691 }
693 if ((ok = smtp_helo(psb, psb->helo_name))) {
694 #ifdef ENABLE_AUTH
695 if (psb->auth_name && psb->use_auth) {
696 /* we completely disregard the response of server here. If
697 authentication fails, the server will complain later
698 anyway. I know, this is not polite... */
699 smtp_out_auth(psb);
700 }
701 #endif
702 }
703 if (!ok)
704 smtp_out_log_failure(psb, NULL);
705 return ok;
706 }
708 gint
709 smtp_out_msg(smtp_base *psb, message *msg, address *return_path,
710 GList *rcpt_list, GList *hdr_list)
711 {
712 gint i, size;
713 gboolean ok = TRUE;
714 int rcpt_cnt;
715 int rcpt_accept = 0;
717 DEBUG(5) debugf("smtp_out_msg entered\n");
719 /* defaults: */
720 if (return_path == NULL)
721 return_path = msg->return_path;
722 if (hdr_list == NULL)
723 hdr_list = msg->hdr_list;
724 if (rcpt_list == NULL)
725 rcpt_list = msg->rcpt_list;
726 rcpt_cnt = g_list_length(rcpt_list);
728 size = msg_calc_size(msg, TRUE);
730 /* respect maximum size given by server: */
731 if ((psb->max_size > 0) && (size > psb->max_size)) {
732 logwrite(LOG_WARNING, "%s == host=%s message size (%d) > "
733 "fixed maximum message size of server (%d)",
734 msg->uid, psb->remote_host, size, psb->max_size);
735 psb->error = smtp_cancel;
736 ok = FALSE;
737 }
739 if (ok) {
740 /*
741 ** pretend the message is a bit larger,
742 ** just in case the size calculation is buggy
743 */
744 smtp_cmd_mailfrom(psb, return_path, psb->use_size ? size+SMTP_SIZE_ADD : 0);
746 if (!psb->use_pipelining) {
747 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
748 ok = check_response(psb, FALSE);
749 }
750 }
751 if (ok) {
752 GList *rcpt_node;
753 rcpt_accept = 0;
755 for (rcpt_node = g_list_first(rcpt_list); rcpt_node != NULL; rcpt_node = g_list_next(rcpt_node)) {
756 address *rcpt = (address *) (rcpt_node->data);
757 smtp_cmd_rcptto(psb, rcpt);
758 if (!psb->use_pipelining) {
759 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
760 if (check_response(psb, FALSE)) {
761 rcpt_accept++;
762 addr_mark_delivered(rcpt);
763 } else {
764 /* if server returned an error for one recp. we
765 may still try the others. But if it is a timeout, eof
766 or unexpected response, it is more serious and we should
767 give up. */
768 if ((psb->error != smtp_trylater) && (psb->error != smtp_fail)) {
769 ok = FALSE;
770 break;
771 } else {
772 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n",
773 msg->uid, addr_string(rcpt), psb->remote_host, psb->buffer);
774 if (psb->error == smtp_trylater) {
775 addr_mark_defered(rcpt);
776 } else {
777 addr_mark_failed(rcpt);
778 }
779 }
780 } else
781 break;
782 }
783 }
785 /*
786 ** There is no point in going on if no recp.s were accpted.
787 ** But we can check that at this point only if not pipelining:
788 */
789 ok = (ok && (psb->use_pipelining || (rcpt_accept > 0)));
790 if (ok) {
792 fprintf(psb->out, "DATA\r\n");
793 fflush(psb->out);
795 DEBUG(4) debugf("C: DATA\r\n");
797 if (psb->use_pipelining) {
798 /*
799 ** the first pl'ed command was MAIL FROM
800 ** the last was DATA, whose response can be
801 ** handled by the 'normal' code all in
802 ** between were RCPT TO:
803 */
804 /* response to MAIL FROM: */
805 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
806 if ((ok = check_response(psb, FALSE))) {
808 /*
809 ** response(s) to RCPT TO:
810 ** this is very similar to
811 ** the sequence above for no
812 ** pipeline
813 */
814 for (i = 0; i < rcpt_cnt; i++) {
815 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
816 address *rcpt = g_list_nth_data(rcpt_list, i);
817 if (check_response(psb, FALSE)) {
818 rcpt_accept++;
819 addr_mark_delivered(rcpt);
820 } else {
821 /*
822 ** if server returned an error 4xx or 5xx for one recp. we
823 ** may still try the others. But if it is a timeout, eof
824 ** or unexpected response, it is more serious and we
825 ** should give up.
826 */
827 if ((psb->error != smtp_trylater) &&
828 (psb->error != smtp_fail)) {
829 ok = FALSE;
830 break;
831 } else {
832 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n", msg->uid,
833 addr_string(rcpt), psb->remote_host, psb->buffer);
834 if (psb->error == smtp_trylater) {
835 addr_mark_defered(rcpt);
836 } else {
837 addr_mark_failed(rcpt);
838 }
839 }
840 }
841 } else {
842 DEBUG(5) debugf("check_response failed after RCPT TO\n");
843 break;
844 }
845 }
846 if (rcpt_accept == 0)
847 ok = FALSE;
848 } else {
849 DEBUG(5) debugf("check_response failed after MAIL FROM\n");
850 }
851 } else {
852 DEBUG(5)
853 debugf("read_response failed after MAIL FROM\n");
854 }
855 }
857 /* if(psb->use_pipelining) */
858 /* response to the DATA cmd */
859 if (ok) {
860 if (read_response(psb, SMTP_DATA_TIMEOUT)) {
861 if (check_response(psb, TRUE)) {
862 send_header(psb, hdr_list);
863 send_data(psb, msg);
865 if (read_response(psb, SMTP_FINAL_TIMEOUT))
866 ok = check_response(psb, FALSE);
867 }
868 }
869 }
870 }
871 }
873 DEBUG(5) {
874 debugf("smtp_out_msg():\n");
875 debugf(" psb->error = %d\n", psb->error);
876 debugf(" ok = %d\n", ok);
877 debugf(" rcpt_accept = %d\n", rcpt_accept);
878 }
880 if (psb->error == smtp_ok) {
881 GList *rcpt_node;
882 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
883 address *rcpt = (address *) (rcpt_node->data);
884 if (addr_is_delivered(rcpt))
885 logwrite(LOG_NOTICE, "%s => %s host=%s\n",
886 msg->uid, addr_string(rcpt), psb->remote_host);
887 }
888 } else {
889 /*
890 ** if something went wrong,
891 ** we have to unmark the rcpts prematurely marked as
892 ** delivered and mark the status
893 */
894 smtp_out_mark_rcpts(psb, rcpt_list);
896 /* log the failure: */
897 smtp_out_log_failure(psb, msg);
898 }
899 return rcpt_accept;
900 }
902 gboolean
903 smtp_out_quit(smtp_base *psb)
904 {
905 fprintf(psb->out, "QUIT\r\n");
906 fflush(psb->out);
908 DEBUG(4) debugf("C: QUIT\n");
910 signal(SIGALRM, SIG_DFL);
912 return TRUE;
913 }
915 gint
916 smtp_deliver(gchar *host, gint port, GList *resolve_list, message *msg,
917 address *return_path, GList *rcpt_list)
918 {
919 smtp_base *psb;
920 smtp_error err;
922 DEBUG(5) debugf("smtp_deliver entered\n");
924 if (return_path == NULL)
925 return_path = msg->return_path;
927 if ((psb = smtp_out_open(host, port, resolve_list))) {
928 set_heloname(psb, return_path->domain, TRUE);
929 /* initiate connection, send message and quit: */
930 if (smtp_out_init(psb, FALSE)) {
931 smtp_out_msg(psb, msg, return_path, rcpt_list, NULL);
932 if (psb->error == smtp_ok || (psb->error == smtp_fail) || (psb->error == smtp_trylater)
933 || (psb->error == smtp_syntax) || (psb->error == smtp_cancel))
934 smtp_out_quit(psb);
935 }
937 err = psb->error;
938 destroy_smtpbase(psb);
940 return err;
941 }
942 return -1;
943 }