masqmail
view src/accept.c @ 160:60c92aa59911
added a script to guess the host's name
| author | meillo@marmaro.de |
|---|---|
| date | Thu, 08 Jul 2010 11:27:03 +0200 |
| parents | 5ec5e6637049 |
| children | 89f951be358f |
line source
1 /* MasqMail
2 Copyright (C) 1999-2001 Oliver Kurth
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
19 #include "masqmail.h"
20 #include "readsock.h"
22 gchar *prot_names[] = {
23 "local",
24 "bsmtp",
25 "smtp",
26 "esmtp",
27 "pop3",
28 "apop",
29 "(unknown)" /* should not happen, but better than crashing. */
30 };
32 static gchar*
33 string_base62(gchar * res, guint value, gchar len)
34 {
35 static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
36 gchar *p = res + len;
37 *p = '\0';
38 while (p > res) {
39 *(--p) = base62_chars[value % 62];
40 value /= 62;
41 }
42 return res;
43 }
45 static gint
46 _g_list_addr_isequal(gconstpointer a, gconstpointer b)
47 {
48 address *addr1 = (address *) a;
49 address *addr2 = (address *) b;
50 int ret;
52 if ((ret = strcasecmp(addr1->domain, addr2->domain)) == 0)
53 return strcmp(addr1->local_part, addr2->local_part);
54 else
55 return ret;
56 }
58 /* accept message from anywhere.
59 A locally originating message is indicated by msg->recieved_host == NULL
61 The -t option:
62 The ACC_RCPT_FROM_HEAD flag adds the recipients found in To/Cc/Bcc
63 headers to the recipients list.
64 The ACC_DEL_RCPTS flag makes only sense if the ACC_RCPT_FROM_HEAD
65 flag is given too. With ACC_DEL_RCPTS the recipients given on the
66 command line are removed from the ones given in headers.
67 */
69 accept_error
70 accept_message_stream(FILE * in, message * msg, guint flags)
71 {
72 gchar *line, *line1;
73 int line_size = MAX_DATALINE;
74 gboolean in_headers = TRUE;
75 header *hdr = NULL;
76 gint line_cnt = 0, data_size = 0;
78 line = g_malloc(line_size);
79 line[0] = '\0';
81 while (TRUE) {
82 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);
84 line1 = line;
86 if ((line[0] == '.') && (!(flags & ACC_DOT_IGNORE))) {
87 if (line[1] == '\n') {
88 g_free(line);
89 break;
90 }
91 line1++;
92 }
94 if (len <= 0) {
95 if ((len == -1) && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {
96 /* we got an EOF, and the last line was not terminated by a CR */
97 gint len1 = strlen(line1);
98 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */
99 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */
100 line1[len1] = '\n';
101 line1[len1 + 1] = '\0';
102 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
103 data_size += strlen(line1);
104 line_cnt++;
105 }
106 }
107 break;
108 } else {
109 g_free(line);
110 if (len == -1) {
111 return AERR_EOF;
112 } else if (len == -2) {
113 /* should not happen any more */
114 return AERR_OVERFLOW;
115 } else if (len == -3) {
116 return AERR_TIMEOUT;
117 } else {
118 /* does not happen */
119 DEBUG(5) debugf("read_sockline returned %d\n", len);
120 return AERR_UNKNOWN;
121 }
122 }
123 } else {
124 if (in_headers) {
126 /* some pop servers send the 'From ' line, skip it: */
127 if (msg->hdr_list == NULL)
128 if (strncmp(line1, "From ", 5) == 0)
129 continue;
131 if (line1[0] == ' ' || line1[0] == '\t') {
132 /* continuation of 'folded' header: */
133 if (hdr) {
134 hdr->header = g_strconcat(hdr->header, line1, NULL);
135 }
137 } else if (line1[0] == '\n') {
138 /* an empty line marks end of headers */
139 in_headers = FALSE;
140 } else {
141 /* in all other cases we expect another header */
142 if ((hdr = get_header(line1)))
143 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
144 else {
145 /* if get_header() returns NULL, no header was recognized,
146 so this seems to be the first data line of a broken mailer
147 which does not send an empty line after the headers */
148 in_headers = FALSE;
149 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
150 }
151 }
152 } else {
153 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
154 data_size += strlen(line1);
155 line_cnt++;
156 }
157 }
158 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {
159 DEBUG(4) debugf("accept_message_stream(): "
160 "received %d bytes (conf.max_msg_size=%d)\n",
161 data_size, conf.max_msg_size);
162 return AERR_SIZE;
163 }
165 }
167 if (msg->data_list != NULL)
168 msg->data_list = g_list_reverse(msg->data_list);
169 else
170 /* make sure data list is not NULL: */
171 msg->data_list = g_list_append(NULL, g_strdup(""));
173 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);
174 /* we get here after we succesfully received the mail data */
176 msg->data_size = data_size;
177 msg->received_time = time(NULL);
179 return AERR_OK;
180 }
182 accept_error
183 accept_message_prepare(message * msg, guint flags)
184 {
185 struct passwd *passwd = NULL;
186 GList *non_rcpt_list = NULL;
187 time_t rec_time = time(NULL);
189 DEBUG(5) debugf("accept_message_prepare()\n");
191 /* create unique message id */
192 msg->uid = g_malloc(14);
194 string_base62(msg->uid, rec_time, 6);
195 msg->uid[6] = '-';
196 string_base62(&(msg->uid[7]), getpid(), 3);
197 msg->uid[10] = '-';
198 string_base62(&(msg->uid[11]), msg->transfer_id, 2);
199 msg->uid[13] = 0;
201 /* if local, get password entry */
202 if (msg->received_host == NULL) {
203 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
204 msg->ident = g_strdup(passwd->pw_name);
205 }
207 /* set return path if local */
208 if (msg->return_path == NULL && msg->received_host == NULL) {
209 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);
210 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);
211 msg->return_path = create_address(path, TRUE);
212 g_free(path);
213 }
215 /* -t option (see comment above) */
216 if (flags & ACC_DEL_RCPTS) {
217 non_rcpt_list = msg->rcpt_list;
218 msg->rcpt_list = NULL;
219 }
221 /* scan headers */
222 {
223 gboolean has_id = FALSE;
224 gboolean has_date = FALSE;
225 gboolean has_sender = FALSE;
226 gboolean has_from = FALSE;
227 gboolean has_to_or_cc = FALSE;
228 GList *hdr_node, *hdr_node_next;
229 header *hdr;
231 for (hdr_node = g_list_first(msg->hdr_list);
232 hdr_node != NULL; hdr_node = hdr_node_next) {
233 hdr_node_next = g_list_next(hdr_node);
234 hdr = ((header *) (hdr_node->data));
235 DEBUG(5) debugf("scanning headers: %s", hdr->header);
236 switch (hdr->id) {
237 case HEAD_MESSAGE_ID:
238 has_id = TRUE;
239 break;
240 case HEAD_DATE:
241 has_date = TRUE;
242 break;
243 case HEAD_FROM:
244 has_from = TRUE;
245 break;
246 case HEAD_SENDER:
247 has_sender = TRUE;
248 break;
249 case HEAD_TO:
250 case HEAD_CC:
251 has_to_or_cc = TRUE;
252 /* fall through */
253 case HEAD_BCC:
254 if (flags & ACC_RCPT_FROM_HEAD) {
255 /* -t option (see comment above) */
256 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);
257 if (hdr->value) {
258 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
259 }
260 }
261 if (hdr->id == HEAD_BCC) {
262 DEBUG(3) debugf("removing 'Bcc' header\n");
263 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
264 g_list_free_1(hdr_node);
265 destroy_header(hdr);
266 }
267 break;
268 case HEAD_ENVELOPE_TO:
269 if (flags & ACC_SAVE_ENVELOPE_TO) {
270 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
271 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,
272 "X-Orig-Envelope-to: %s", hdr->value));
273 }
274 DEBUG(3) debugf("removing 'Envelope-To' header\n");
275 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
276 g_list_free_1(hdr_node);
277 destroy_header(hdr);
278 break;
279 case HEAD_RETURN_PATH:
280 if (flags & ACC_MAIL_FROM_HEAD) {
281 /* usually POP3 accept */
282 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
283 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
284 }
285 DEBUG(3) debugf("removing 'Return-Path' header\n");
286 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
287 g_list_free_1(hdr_node);
288 destroy_header(hdr);
289 break;
290 default:
291 break; /* make compiler happy */
292 }
293 }
295 if (msg->return_path == NULL) {
296 /* this can happen for pop3 accept only and if no Return-path: header was given */
297 GList *hdr_list;
298 header *hdr;
300 DEBUG(3) debugf("return_path == NULL\n");
302 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
303 if (!hdr_list)
304 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
305 if (hdr_list) {
306 gchar *addr;
307 hdr = (header *) (g_list_first(hdr_list)->data);
309 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);
311 addr = g_strdup(hdr->value);
312 g_strchomp(addr);
314 if ((msg->return_path = create_address_qualified(addr, FALSE, msg->received_host)) != NULL) {
315 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
316 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,
317 "X-Warning: return path set from %s address\n",
318 hdr->id == HEAD_SENDER ? "Sender:" : "From:"));
319 }
320 g_free(addr);
321 }
322 if (msg->return_path == NULL) { /* no Sender: or From: or create_address_qualified failed */
323 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);
324 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
325 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,
326 "X-Warning: real return path is unknown\n"));
327 }
328 }
330 if (flags & ACC_DEL_RCPTS) {
331 /* remove the recipients given on the command line from the ones given in headers
332 -t option (see comment above) */
333 GList *rcpt_node;
334 foreach(non_rcpt_list, rcpt_node) {
335 address *rcpt = (address *) (rcpt_node->data);
336 GList *node;
337 if ((node = g_list_find_custom(msg->rcpt_list, rcpt, _g_list_addr_isequal))) {
338 DEBUG(3) debugf("removing rcpt address %s\n", addr_string(node->data));
339 msg->rcpt_list = g_list_remove_link(msg->rcpt_list, node);
340 destroy_address((address *) (node->data));
341 g_list_free_1(node);
342 }
343 }
344 }
346 /* here we should have our recipients, fail if not: */
347 if (msg->rcpt_list == NULL) {
348 logwrite(LOG_WARNING, "no recipients found in message\n");
349 return AERR_NORCPT;
350 }
352 if (!(has_sender || has_from)) {
353 DEBUG(3) debugf("adding 'From' header\n");
354 msg->hdr_list = g_list_append(msg->hdr_list,
355 msg->full_sender_name
356 ?
357 create_header(HEAD_FROM, "From: \"%s\" <%s@%s>\n", msg->full_sender_name,
358 msg->return_path->local_part, msg->return_path->domain)
359 :
360 create_header(HEAD_FROM, "From: <%s@%s>\n",
361 msg->return_path->local_part, msg->return_path->domain)
362 );
363 }
364 if (!has_to_or_cc) {
365 DEBUG(3) debugf("no To: or Cc: header, hence adding `To: undisclosed recipients:;'\n");
366 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: undisclosed-recipients:;\n"));
367 }
368 if (!has_date) {
369 DEBUG(3) debugf("adding 'Date:' header\n");
370 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));
371 }
372 if (!has_id) {
373 DEBUG(3) debugf("adding 'Message-ID:' header\n");
374 msg->hdr_list = g_list_append(msg->hdr_list,
375 create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));
376 }
377 }
379 /* Received header: */
380 /* At this point because we have to know the rcpts for the 'for' part */
381 gchar *for_string = NULL;
382 header *hdr = NULL;
384 DEBUG(3) debugf("adding 'Received:' header\n");
386 if (g_list_length(msg->rcpt_list) == 1) {
387 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);
388 for_string = g_strdup_printf(" for %s", addr_string(addr));
389 }
391 if (msg->received_host == NULL) {
392 /* received locally */
393 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",
394 passwd->pw_name, conf.host_name, prot_names[msg->received_prot],
395 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());
396 } else {
397 /* received from remote */
398 #ifdef ENABLE_IDENT
399 DEBUG(5) debugf("adding 'Received:' header (5)\n");
400 hdr = create_header(HEAD_RECEIVED, "Received: from %s (ident=%s) by %s with %s (%s %s) id %s%s; %s\n",
401 msg->received_host, msg->ident ? msg->ident : "unknown", conf.host_name,
402 prot_names[msg->received_prot], PACKAGE, VERSION, msg->uid, for_string ? for_string : "",
403 rec_timestamp());
404 #else
405 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",
406 msg->received_host, conf.host_name, prot_names[msg->received_prot],
407 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());
408 #endif
409 }
410 header_fold(hdr);
411 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
413 if (for_string)
414 g_free(for_string);
416 /* write message to spool: */
417 /* accept is no longer responsible for this
418 if (!spool_write(msg, TRUE))
419 return AERR_NOSPOOL;
420 */
421 return AERR_OK;
422 }
424 accept_error
425 accept_message(FILE * in, message * msg, guint flags)
426 {
427 accept_error err;
429 err = accept_message_stream(in, msg, flags);
430 if (err == AERR_OK)
431 err = accept_message_prepare(msg, flags);
433 return err;
434 }