masqmail

view src/accept.c @ 434:f2a7271746d1

Removes Freshmeat.net from the docs The site, which was later renamed to freecode.com, is no longer maintained (contains only a static copy).
author markus schnalke <meillo@marmaro.de>
date Sat, 07 Feb 2015 11:45:07 +0100
parents aa40710f09fe
children
line source
1 /*
2 ** MasqMail
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
21 #include "masqmail.h"
22 #include "readsock.h"
24 /* must match PROT_* in masqmail.h */
25 gchar *prot_names[] = {
26 "local",
27 "SMTP",
28 "ESMTP",
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[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
36 "abcdefghijklmnopqrstuvwxyz";
37 gchar *p = res + len;
38 *p = '\0';
39 while (p > res) {
40 *(--p) = base62_chars[value % 62];
41 value /= 62;
42 }
43 return res;
44 }
46 /*
47 ** accept message from anywhere.
48 ** A message from local is indicated by msg->recieved_host == NULL
49 **
50 ** The -t option: With the ACC_RCPT_FROM_HEAD flag the addrs found found
51 ** in To/Cc/Bcc headers are added to the recipient list.
52 */
53 accept_error
54 accept_message_stream(FILE *in, message *msg, guint flags)
55 {
56 gchar *line, *line1;
57 int line_size = MAX_DATALINE;
58 gboolean in_headers = TRUE;
59 header *hdr = NULL;
60 gint line_cnt = 0, data_size = 0;
62 line = g_malloc(line_size);
63 *line = '\0';
65 while (1) {
66 int len = read_sockline1(in, &line, &line_size, 5 * 60,
67 READSOCKL_CVT_CRLF);
68 line1 = line;
70 if ((*line == '.') && (!(flags & ACC_DOT_IGNORE))) {
71 if (line[1] == '\n') {
72 g_free(line);
73 break;
74 }
75 line1++;
76 }
78 if (len==-1 && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {
79 /* at EOF but last line was not terminated by CR */
80 /* some MUAs allow unterminated lines */
81 gint len1 = strlen(line1);
82 if (len1 > 0 && line1[len1-1] != '\n') {
83 line1[len1] = '\n';
84 line1[len1+1] = '\0';
85 msg->data_list = g_list_prepend(msg->data_list,
86 g_strdup(line1));
87 data_size += strlen(line1);
88 line_cnt++;
89 }
90 break;
92 } else if (len == -1) {
93 g_free(line);
94 return AERR_EOF;
96 } else if (len == -2) {
97 /* should not happen any more */
98 g_free(line);
99 return AERR_OVERFLOW;
101 } else if (len == -3) {
102 g_free(line);
103 return AERR_TIMEOUT;
105 } else if (len <= 0) {
106 /* does not happen */
107 g_free(line);
108 DEBUG(5) debugf("read_sockline returned %d\n", len);
109 return AERR_UNKNOWN;
111 }
113 if (in_headers) {
114 /* some pop servers send the 'From ' line, skip it: */
115 if (!msg->hdr_list && strncmp(line1, "From ", 5)==0) {
116 continue;
117 }
119 if (*line1 == ' ' || *line1 == '\t') {
120 /* continuation of 'folded' header: */
121 if (hdr) {
122 char *cp;
123 cp = g_strconcat(hdr->header, line1,
124 NULL);
125 hdr->value = cp + (hdr->value -
126 hdr->header);
127 free(hdr->header);
128 hdr->header = cp;
129 }
130 } else if (*line1 == '\n') {
131 /* an empty line marks end of headers */
132 in_headers = FALSE;
134 } else if ((hdr = get_header(line1))) {
135 /* another header */
136 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
137 } else {
138 /*
139 ** Should be another header but none was
140 ** recognized, so this seems to be the first
141 ** data line of a broken mailer which does
142 ** not add an empty line after the headers.
143 */
144 in_headers = FALSE;
145 msg->data_list = g_list_prepend(msg->data_list,
146 g_strdup(line1));
147 }
148 } else {
149 /* message body */
150 msg->data_list = g_list_prepend(msg->data_list,
151 g_strdup(line1));
152 data_size += strlen(line1);
153 line_cnt++;
154 }
156 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {
157 DEBUG(4) debugf("accept_message_stream(): "
158 "received %d bytes (conf.max_msg_size=%d)\n",
159 data_size, conf.max_msg_size);
160 return AERR_SIZE;
161 }
162 }
163 DEBUG(4) debugf("received %d lines of data (%d bytes)\n",
164 line_cnt, data_size);
166 if (!msg->data_list) {
167 /* make sure data list is not NULL */
168 msg->data_list = g_list_append(NULL, g_strdup(""));
169 }
170 msg->data_list = g_list_reverse(msg->data_list);
172 /* we have succesfully received the mail data */
174 msg->data_size = data_size;
175 msg->received_time = time(NULL);
177 return AERR_OK;
178 }
180 static void
181 ensure_return_path(message *msg)
182 {
183 GList *hdr_list;
184 header *hdr;
185 gchar *addr;
187 if (msg->return_path) {
188 return;
189 }
191 DEBUG(3) debugf("return_path == NULL\n");
193 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
194 if (!hdr_list) {
195 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
196 }
197 if (hdr_list) {
198 hdr = (header *) (g_list_first(hdr_list)->data);
200 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);
202 addr = g_strstrip(g_strdup(hdr->value));
203 msg->return_path = create_address_qualified(addr,
204 FALSE, msg->received_host);
205 if (msg->return_path) {
206 DEBUG(3) debugf("setting return_path to %s\n",
207 addr_string(msg->return_path));
208 msg->hdr_list = g_list_append(msg->hdr_list,
209 create_header(HEAD_UNKNOWN,
210 "X-Warning: return path set from %s "
211 "address\n",
212 (hdr->id == HEAD_SENDER) ?
213 "Sender:" : "From:"));
214 }
215 g_free(addr);
216 }
217 if (!msg->return_path) {
218 /* no Sender: or From: or create_address_qualified failed */
219 msg->return_path = create_address_qualified("postmaster",
220 TRUE, conf.host_name);
221 DEBUG(3) debugf("setting return_path to %s\n",
222 addr_string(msg->return_path));
223 msg->hdr_list = g_list_append(msg->hdr_list,
224 create_header(HEAD_UNKNOWN,
225 "X-Warning: real return path is unknown\n"));
226 }
227 }
229 static accept_error
230 scan_headers(message *msg, guint flags)
231 {
232 gboolean has_id = FALSE;
233 gboolean has_date = FALSE;
234 gboolean has_sender = FALSE;
235 gboolean has_from = FALSE;
236 gboolean has_to_or_cc = FALSE;
237 GList *hdr_node, *hdr_node_next;
238 header *hdr;
240 for (hdr_node = g_list_first(msg->hdr_list); hdr_node;
241 hdr_node = hdr_node_next) {
242 hdr_node_next = g_list_next(hdr_node);
243 hdr = ((header *) (hdr_node->data));
244 DEBUG(5) debugf("scanning headers: %s", hdr->header);
245 switch (hdr->id) {
246 case HEAD_MESSAGE_ID:
247 has_id = TRUE;
248 break;
249 case HEAD_DATE:
250 has_date = TRUE;
251 break;
252 case HEAD_FROM:
253 has_from = TRUE;
254 break;
255 case HEAD_SENDER:
256 has_sender = TRUE;
257 break;
258 case HEAD_TO:
259 case HEAD_CC:
260 has_to_or_cc = TRUE;
261 /* fall through */
262 case HEAD_BCC:
263 if (flags & ACC_RCPT_FROM_HEAD) {
264 /* -t option (see comment above) */
265 DEBUG(5) debugf("hdr->value = %s\n",
266 hdr->value);
267 if (hdr->value) {
268 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
269 }
270 }
271 if (hdr->id == HEAD_BCC) {
272 DEBUG(3) debugf("removing 'Bcc' header\n");
273 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
274 g_list_free_1(hdr_node);
275 destroy_header(hdr);
276 }
277 break;
278 case HEAD_ENVELOPE_TO:
279 if (flags & ACC_SAVE_ENVELOPE_TO) {
280 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
281 msg->hdr_list = g_list_prepend(msg->hdr_list,
282 create_header(HEAD_UNKNOWN,
283 "X-Orig-Envelope-To: %s",
284 hdr->value));
285 }
286 DEBUG(3) debugf("removing 'Envelope-To' header\n");
287 msg->hdr_list = g_list_remove_link(msg->hdr_list,
288 hdr_node);
289 g_list_free_1(hdr_node);
290 destroy_header(hdr);
291 break;
292 case HEAD_RETURN_PATH:
293 if (flags & ACC_MAIL_FROM_HEAD) {
294 /* usually POP3 accept */
295 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
296 DEBUG(3) debugf("setting return_path to %s\n",
297 addr_string(msg->return_path));
298 }
299 DEBUG(3) debugf("removing 'Return-Path' header\n");
300 msg->hdr_list = g_list_remove_link(msg->hdr_list,
301 hdr_node);
302 g_list_free_1(hdr_node);
303 destroy_header(hdr);
304 break;
305 default:
306 break; /* make compiler happy */
307 }
308 }
310 /*
311 ** TODO: do we still need this as we don't fetch
312 ** mail anymore?
313 ** This can happen for pop3 accept only and if no
314 ** Return-Path: header was given
315 */
316 ensure_return_path(msg);
318 /* here we should have our recipients, fail if not: */
319 if (!msg->rcpt_list) {
320 logwrite(LOG_WARNING, "no recipients found in message\n");
321 return AERR_NORCPT;
322 }
324 if (!has_sender && !has_from) {
325 DEBUG(3) debugf("adding 'From:' header\n");
326 if (msg->full_sender_name) {
327 msg->hdr_list = g_list_append(msg->hdr_list,
328 create_header(HEAD_FROM,
329 "From: \"%s\" <%s@%s>\n",
330 msg->full_sender_name,
331 msg->return_path->local_part,
332 msg->return_path->domain));
333 } else {
334 msg->hdr_list = g_list_append(msg->hdr_list,
335 create_header(HEAD_FROM,
336 "From: <%s@%s>\n",
337 msg->return_path->local_part,
338 msg->return_path->domain));
339 }
340 }
341 if (!has_to_or_cc) {
342 DEBUG(3) debugf("no To: or Cc: header, hence adding "
343 "`To: undisclosed recipients:;'\n");
344 msg->hdr_list = g_list_append(msg->hdr_list,
345 create_header(HEAD_TO,
346 "To: undisclosed-recipients:;\n"));
347 }
348 if (!has_date) {
349 DEBUG(3) debugf("adding 'Date:' header\n");
350 msg->hdr_list = g_list_append(msg->hdr_list,
351 create_header(HEAD_DATE, "Date: %s\n",
352 rec_timestamp()));
353 }
354 if (!has_id) {
355 DEBUG(3) debugf("adding 'Message-ID:' header\n");
356 msg->hdr_list = g_list_append(msg->hdr_list,
357 create_header(HEAD_MESSAGE_ID,
358 "Message-ID: <%s@%s>\n",
359 msg->uid, conf.host_name));
360 }
362 return AERR_OK;
363 }
365 static void
366 add_received_hdr(message *msg)
367 {
368 gchar *for_string = NULL;
369 header *hdr = NULL;
370 address *addr;
372 DEBUG(3) debugf("adding 'Received:' header\n");
373 if (g_list_length(msg->rcpt_list) == 1) {
374 /* The `for' part only if exactly one rcpt is present */
375 addr = (address *) (g_list_first(msg->rcpt_list)->data);
376 for_string = g_strdup_printf("\n\tfor %s", addr_string(addr));
377 }
378 if (!msg->received_host) {
379 /* received locally */
380 hdr = create_header(HEAD_RECEIVED,
381 "Received: by %s (%s %s, from userid %d)\n"
382 "\tid %s%s; %s\n",
383 conf.host_name, PACKAGE, VERSION, geteuid(),
384 msg->uid,
385 for_string ? for_string : "", rec_timestamp());
386 } else {
387 /* received from remote */
388 DEBUG(5) debugf("adding 'Received:' header (5)\n");
389 hdr = create_header(HEAD_RECEIVED,
390 "Received: from %s\n"
391 "\tby %s with %s (%s %s)\n"
392 "\tid %s%s; %s\n",
393 msg->received_host, conf.host_name,
394 prot_names[msg->received_prot], PACKAGE,
395 VERSION, msg->uid,
396 for_string ? for_string : "", rec_timestamp());
397 }
398 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
399 if (for_string) {
400 g_free(for_string);
401 }
402 }
404 accept_error
405 accept_message_prepare(message *msg, guint flags)
406 {
407 DEBUG(5) debugf("accept_message_prepare()\n");
409 /* generate unique message id */
410 msg->uid = g_malloc(14);
411 string_base62(msg->uid, time(NULL), 6);
412 msg->uid[6] = '-';
413 string_base62(msg->uid + 7, getpid(), 3);
414 msg->uid[10] = '-';
415 string_base62(msg->uid + 11, msg->transfer_id, 2);
416 msg->uid[13] = '\0';
418 /* if local, get password entry and set return path if missing */
419 if (!msg->received_host) {
420 struct passwd *passwd = NULL;
422 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
423 msg->ident = g_strdup(passwd->pw_name);
424 if (!msg->return_path) {
425 gchar *path = g_strdup_printf("<%s@%s>",
426 passwd->pw_name, conf.host_name);
427 DEBUG(3) debugf("setting return_path for local "
428 "accept: %s\n", path);
429 msg->return_path = create_address(path, TRUE);
430 g_free(path);
431 }
432 }
434 if (scan_headers(msg, flags) == AERR_NORCPT) {
435 return AERR_NORCPT;
436 }
438 /* after the hdrs are scanned because we need to know the rcpts */
439 add_received_hdr(msg);
441 return AERR_OK;
442 }
444 accept_error
445 accept_message(FILE *in, message *msg, guint flags)
446 {
447 accept_error err;
449 err = accept_message_stream(in, msg, flags);
450 if (err == AERR_OK) {
451 err = accept_message_prepare(msg, flags);
452 }
454 return err;
455 }