masqmail

view src/accept.c @ 282:ba53e648906f

-q and -qo are non-exclusive -qo without arg is already included in -q (-qXXX is something completely different)
author markus schnalke <meillo@marmaro.de>
date Tue, 07 Dec 2010 14:07:25 -0300
parents 1405012509e3
children bb3005ce0837
line source
1 /* MasqMail
2 Copyright (C) 1999-2001 Oliver Kurth
3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
20 #include "masqmail.h"
21 #include "readsock.h"
23 gchar *prot_names[] = {
24 "local",
25 "bsmtp",
26 "smtp",
27 "esmtp",
28 "(unknown)" /* should not happen, but better than crashing. */
29 };
31 static gchar*
32 string_base62(gchar * res, guint value, gchar len)
33 {
34 static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
35 gchar *p = res + len;
36 *p = '\0';
37 while (p > res) {
38 *(--p) = base62_chars[value % 62];
39 value /= 62;
40 }
41 return res;
42 }
44 static gint
45 _g_list_addr_isequal(gconstpointer a, gconstpointer b)
46 {
47 address *addr1 = (address *) a;
48 address *addr2 = (address *) b;
49 int ret;
51 if ((ret = strcasecmp(addr1->domain, addr2->domain)) == 0) {
52 return strcmp(addr1->local_part, addr2->local_part);
53 }
54 return ret;
55 }
57 /* accept message from anywhere.
58 A message from local is indicated by msg->recieved_host == NULL
60 The -t option: With the ACC_RCPT_FROM_HEAD flag the addrs found found
61 in To/Cc/Bcc headers are added to the recipient list.
62 */
64 accept_error
65 accept_message_stream(FILE * in, message * msg, guint flags)
66 {
67 gchar *line, *line1;
68 int line_size = MAX_DATALINE;
69 gboolean in_headers = TRUE;
70 header *hdr = NULL;
71 gint line_cnt = 0, data_size = 0;
73 line = g_malloc(line_size);
74 line[0] = '\0';
76 while (TRUE) {
77 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);
79 line1 = line;
81 if ((line[0] == '.') && (!(flags & ACC_DOT_IGNORE))) {
82 if (line[1] == '\n') {
83 g_free(line);
84 break;
85 }
86 line1++;
87 }
89 if ((len == -1) && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {
90 /* we got an EOF, and the last line was not terminated by a CR */
91 gint len1 = strlen(line1);
92 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */
93 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */
94 line1[len1] = '\n';
95 line1[len1 + 1] = '\0';
96 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
97 data_size += strlen(line1);
98 line_cnt++;
99 }
100 }
101 break;
103 } else if (len == -1) {
104 g_free(line);
105 return AERR_EOF;
107 } else if (len == -2) {
108 /* should not happen any more */
109 g_free(line);
110 return AERR_OVERFLOW;
112 } else if (len == -3) {
113 g_free(line);
114 return AERR_TIMEOUT;
116 } else if (len <= 0) {
117 /* does not happen */
118 g_free(line);
119 DEBUG(5) debugf("read_sockline returned %d\n", len);
120 return AERR_UNKNOWN;
122 }
124 if (in_headers) {
126 /* some pop servers send the 'From ' line, skip it: */
127 if (!msg->hdr_list && strncmp(line1, "From ", 5) == 0) {
128 continue;
129 }
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 /* message body */
154 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
155 data_size += strlen(line1);
156 line_cnt++;
157 }
159 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {
160 DEBUG(4) debugf("accept_message_stream(): "
161 "received %d bytes (conf.max_msg_size=%d)\n",
162 data_size, conf.max_msg_size);
163 return AERR_SIZE;
164 }
166 }
168 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);
170 if (!msg->data_list) {
171 /* make sure data list is not NULL: */
172 msg->data_list = g_list_append(NULL, g_strdup(""));
173 }
174 msg->data_list = g_list_reverse(msg->data_list);
176 /* we get here after we succesfully received the mail data */
178 msg->data_size = data_size;
179 msg->received_time = time(NULL);
181 return AERR_OK;
182 }
184 accept_error
185 accept_message_prepare(message * msg, guint flags)
186 {
187 struct passwd *passwd = NULL;
188 time_t rec_time = time(NULL);
190 DEBUG(5) debugf("accept_message_prepare()\n");
192 /* create unique message id */
193 msg->uid = g_malloc(14);
195 string_base62(msg->uid, rec_time, 6);
196 msg->uid[6] = '-';
197 string_base62(&(msg->uid[7]), getpid(), 3);
198 msg->uid[10] = '-';
199 string_base62(&(msg->uid[11]), msg->transfer_id, 2);
200 msg->uid[13] = 0;
202 /* if local, get password entry */
203 if (msg->received_host == NULL) {
204 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
205 msg->ident = g_strdup(passwd->pw_name);
206 }
208 /* set return path if local */
209 if (msg->return_path == NULL && msg->received_host == NULL) {
210 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);
211 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);
212 msg->return_path = create_address(path, TRUE);
213 g_free(path);
214 }
216 /* scan headers */
217 {
218 gboolean has_id = FALSE;
219 gboolean has_date = FALSE;
220 gboolean has_sender = FALSE;
221 gboolean has_from = FALSE;
222 gboolean has_to_or_cc = FALSE;
223 GList *hdr_node, *hdr_node_next;
224 header *hdr;
226 for (hdr_node = g_list_first(msg->hdr_list);
227 hdr_node != NULL; hdr_node = hdr_node_next) {
228 hdr_node_next = g_list_next(hdr_node);
229 hdr = ((header *) (hdr_node->data));
230 DEBUG(5) debugf("scanning headers: %s", hdr->header);
231 switch (hdr->id) {
232 case HEAD_MESSAGE_ID:
233 has_id = TRUE;
234 break;
235 case HEAD_DATE:
236 has_date = TRUE;
237 break;
238 case HEAD_FROM:
239 has_from = TRUE;
240 break;
241 case HEAD_SENDER:
242 has_sender = TRUE;
243 break;
244 case HEAD_TO:
245 case HEAD_CC:
246 has_to_or_cc = TRUE;
247 /* fall through */
248 case HEAD_BCC:
249 if (flags & ACC_RCPT_FROM_HEAD) {
250 /* -t option (see comment above) */
251 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);
252 if (hdr->value) {
253 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
254 }
255 }
256 if (hdr->id == HEAD_BCC) {
257 DEBUG(3) debugf("removing 'Bcc' header\n");
258 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
259 g_list_free_1(hdr_node);
260 destroy_header(hdr);
261 }
262 break;
263 case HEAD_ENVELOPE_TO:
264 if (flags & ACC_SAVE_ENVELOPE_TO) {
265 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
266 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,
267 "X-Orig-Envelope-To: %s", hdr->value));
268 }
269 DEBUG(3) debugf("removing 'Envelope-To' header\n");
270 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
271 g_list_free_1(hdr_node);
272 destroy_header(hdr);
273 break;
274 case HEAD_RETURN_PATH:
275 if (flags & ACC_MAIL_FROM_HEAD) {
276 /* usually POP3 accept */
277 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
278 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
279 }
280 DEBUG(3) debugf("removing 'Return-Path' header\n");
281 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
282 g_list_free_1(hdr_node);
283 destroy_header(hdr);
284 break;
285 default:
286 break; /* make compiler happy */
287 }
288 }
290 if (msg->return_path == NULL) {
291 /* this can happen for pop3 accept only and if no Return-path: header was given */
292 GList *hdr_list;
293 header *hdr;
295 DEBUG(3) debugf("return_path == NULL\n");
297 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
298 if (!hdr_list)
299 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
300 if (hdr_list) {
301 gchar *addr;
302 hdr = (header *) (g_list_first(hdr_list)->data);
304 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);
306 addr = g_strdup(hdr->value);
307 g_strchomp(addr);
309 if ((msg->return_path = create_address_qualified(addr, FALSE, msg->received_host)) != NULL) {
310 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
311 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,
312 "X-Warning: return path set from %s address\n",
313 hdr->id == HEAD_SENDER ? "Sender:" : "From:"));
314 }
315 g_free(addr);
316 }
317 if (msg->return_path == NULL) { /* no Sender: or From: or create_address_qualified failed */
318 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);
319 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
320 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,
321 "X-Warning: real return path is unknown\n"));
322 }
323 }
325 /* here we should have our recipients, fail if not: */
326 if (!msg->rcpt_list) {
327 logwrite(LOG_WARNING, "no recipients found in message\n");
328 return AERR_NORCPT;
329 }
331 if (!(has_sender || has_from)) {
332 DEBUG(3) debugf("adding 'From' header\n");
333 msg->hdr_list = g_list_append(msg->hdr_list,
334 msg->full_sender_name
335 ?
336 create_header(HEAD_FROM, "From: \"%s\" <%s@%s>\n", msg->full_sender_name,
337 msg->return_path->local_part, msg->return_path->domain)
338 :
339 create_header(HEAD_FROM, "From: <%s@%s>\n",
340 msg->return_path->local_part, msg->return_path->domain)
341 );
342 }
343 if (!has_to_or_cc) {
344 DEBUG(3) debugf("no To: or Cc: header, hence adding `To: undisclosed recipients:;'\n");
345 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: undisclosed-recipients:;\n"));
346 }
347 if (!has_date) {
348 DEBUG(3) debugf("adding 'Date:' header\n");
349 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));
350 }
351 if (!has_id) {
352 DEBUG(3) debugf("adding 'Message-ID:' header\n");
353 msg->hdr_list = g_list_append(msg->hdr_list,
354 create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));
355 }
356 }
358 /* Received header: */
359 /* At this point because we have to know the rcpts for the 'for' part */
360 gchar *for_string = NULL;
361 header *hdr = NULL;
363 DEBUG(3) debugf("adding 'Received:' header\n");
365 if (g_list_length(msg->rcpt_list) == 1) {
366 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);
367 for_string = g_strdup_printf(" for %s", addr_string(addr));
368 }
370 if (msg->received_host == NULL) {
371 /* received locally */
372 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",
373 passwd->pw_name, conf.host_name, prot_names[msg->received_prot],
374 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());
375 } else {
376 /* received from remote */
377 #ifdef ENABLE_IDENT
378 DEBUG(5) debugf("adding 'Received:' header (5)\n");
379 hdr = create_header(HEAD_RECEIVED, "Received: from %s (ident=%s) by %s with %s (%s %s) id %s%s; %s\n",
380 msg->received_host, msg->ident ? msg->ident : "unknown", conf.host_name,
381 prot_names[msg->received_prot], PACKAGE, VERSION, msg->uid, for_string ? for_string : "",
382 rec_timestamp());
383 #else
384 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",
385 msg->received_host, conf.host_name, prot_names[msg->received_prot],
386 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());
387 #endif
388 }
389 header_fold(hdr);
390 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
392 if (for_string)
393 g_free(for_string);
395 return AERR_OK;
396 }
398 accept_error
399 accept_message(FILE * in, message * msg, guint flags)
400 {
401 accept_error err;
403 err = accept_message_stream(in, msg, flags);
404 if (err == AERR_OK) {
405 err = accept_message_prepare(msg, flags);
406 }
408 return err;
409 }