masqmail
view src/accept.c @ 386:13c9e0969054
Ignore pointer sign warnings.
| author | markus schnalke <meillo@marmaro.de> |
|---|---|
| date | Sat, 18 Feb 2012 11:43:06 +0100 |
| parents | 9bc3e47b0222 |
| children | aa40710f09fe |
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[] = "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 /*
46 ** accept message from anywhere.
47 ** A message from local is indicated by msg->recieved_host == NULL
48 **
49 ** The -t option: With the ACC_RCPT_FROM_HEAD flag the addrs found found
50 ** in To/Cc/Bcc headers are added to the recipient list.
51 */
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] = '\0';
65 while (TRUE) {
66 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);
68 line1 = line;
70 if ((line[0] == '.') && (!(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 /* we got an EOF, and the last line was not terminated by a CR */
80 gint len1 = strlen(line1);
81 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */
82 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */
83 line1[len1] = '\n';
84 line1[len1 + 1] = '\0';
85 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
86 data_size += strlen(line1);
87 line_cnt++;
88 }
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) {
115 /* some pop servers send the 'From ' line, skip it: */
116 if (!msg->hdr_list && strncmp(line1, "From ", 5) == 0) {
117 continue;
118 }
120 if (line1[0] == ' ' || line1[0] == '\t') {
121 /* continuation of 'folded' header: */
122 if (hdr) {
123 char *cp;
124 cp = g_strconcat(hdr->header, line1, NULL);
125 hdr->value = cp + (hdr->value - hdr->header);
126 free(hdr->header);
127 hdr->header = cp;
128 }
130 } else if (line1[0] == '\n') {
131 /* an empty line marks end of headers */
132 in_headers = FALSE;
133 } else {
134 /* in all other cases we expect another header */
135 if ((hdr = get_header(line1))) {
136 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
137 } else {
138 /*
139 ** if get_header() returns NULL,
140 ** no header was recognized,
141 ** so this seems to be the first
142 ** data line of a broken mailer
143 ** which does not send an empty
144 ** line after the headers
145 */
146 in_headers = FALSE;
147 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
148 }
149 }
150 } else {
151 /* message body */
152 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
153 data_size += strlen(line1);
154 line_cnt++;
155 }
157 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {
158 DEBUG(4) debugf("accept_message_stream(): "
159 "received %d bytes (conf.max_msg_size=%d)\n",
160 data_size, conf.max_msg_size);
161 return AERR_SIZE;
162 }
164 }
166 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);
168 if (!msg->data_list) {
169 /* make sure data list is not NULL: */
170 msg->data_list = g_list_append(NULL, g_strdup(""));
171 }
172 msg->data_list = g_list_reverse(msg->data_list);
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 time_t rec_time = time(NULL);
188 DEBUG(5) debugf("accept_message_prepare()\n");
190 /* create unique message id */
191 msg->uid = g_malloc(14);
192 string_base62(msg->uid, rec_time, 6);
193 msg->uid[6] = '-';
194 string_base62(msg->uid + 7, getpid(), 3);
195 msg->uid[10] = '-';
196 string_base62(msg->uid + 11, msg->transfer_id, 2);
197 msg->uid[13] = '\0';
199 /* if local, get password entry and set return path if missing */
200 if (!msg->received_host) {
201 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
202 msg->ident = g_strdup(passwd->pw_name);
203 if (!msg->return_path) {
204 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);
205 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);
206 msg->return_path = create_address(path, TRUE);
207 g_free(path);
208 }
209 }
211 /* scan headers */
212 {
213 gboolean has_id = FALSE;
214 gboolean has_date = FALSE;
215 gboolean has_sender = FALSE;
216 gboolean has_from = FALSE;
217 gboolean has_to_or_cc = FALSE;
218 GList *hdr_node, *hdr_node_next;
219 header *hdr;
221 for (hdr_node = g_list_first(msg->hdr_list);
222 hdr_node;
223 hdr_node = hdr_node_next) {
224 hdr_node_next = g_list_next(hdr_node);
225 hdr = ((header *) (hdr_node->data));
226 DEBUG(5) debugf("scanning headers: %s", hdr->header);
227 switch (hdr->id) {
228 case HEAD_MESSAGE_ID:
229 has_id = TRUE;
230 break;
231 case HEAD_DATE:
232 has_date = TRUE;
233 break;
234 case HEAD_FROM:
235 has_from = TRUE;
236 break;
237 case HEAD_SENDER:
238 has_sender = TRUE;
239 break;
240 case HEAD_TO:
241 case HEAD_CC:
242 has_to_or_cc = TRUE;
243 /* fall through */
244 case HEAD_BCC:
245 if (flags & ACC_RCPT_FROM_HEAD) {
246 /* -t option (see comment above) */
247 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);
248 if (hdr->value) {
249 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
250 }
251 }
252 if (hdr->id == HEAD_BCC) {
253 DEBUG(3) debugf("removing 'Bcc' header\n");
254 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
255 g_list_free_1(hdr_node);
256 destroy_header(hdr);
257 }
258 break;
259 case HEAD_ENVELOPE_TO:
260 if (flags & ACC_SAVE_ENVELOPE_TO) {
261 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
262 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,
263 "X-Orig-Envelope-To: %s", hdr->value));
264 }
265 DEBUG(3) debugf("removing 'Envelope-To' header\n");
266 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
267 g_list_free_1(hdr_node);
268 destroy_header(hdr);
269 break;
270 case HEAD_RETURN_PATH:
271 if (flags & ACC_MAIL_FROM_HEAD) {
272 /* usually POP3 accept */
273 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
274 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
275 }
276 DEBUG(3) debugf("removing 'Return-Path' header\n");
277 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
278 g_list_free_1(hdr_node);
279 destroy_header(hdr);
280 break;
281 default:
282 break; /* make compiler happy */
283 }
284 }
286 if (!msg->return_path) {
287 /*
288 ** TODO: do we still need this as we don't fetch
289 ** mail anymore?
290 ** This can happen for pop3 accept only and if no
291 ** Return-Path: header was given
292 */
293 GList *hdr_list;
294 header *hdr;
296 DEBUG(3) debugf("return_path == NULL\n");
298 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
299 if (!hdr_list) {
300 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
301 }
302 if (hdr_list) {
303 gchar *addr;
304 hdr = (header *) (g_list_first(hdr_list)->data);
306 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);
308 addr = g_strdup(hdr->value);
309 g_strchomp(addr);
311 msg->return_path = create_address_qualified(addr, FALSE, msg->received_host);
312 if (msg->return_path) {
313 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
314 msg->hdr_list = g_list_append( msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Warning: return path set from %s address\n", hdr->id == HEAD_SENDER ? "Sender:" : "From:"));
315 }
316 g_free(addr);
317 }
318 if (!msg->return_path) {
319 /* no Sender: or From: or
320 create_address_qualified failed */
321 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);
322 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
323 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Warning: real return path is unknown\n"));
324 }
325 }
327 /* here we should have our recipients, fail if not: */
328 if (!msg->rcpt_list) {
329 logwrite(LOG_WARNING, "no recipients found in message\n");
330 return AERR_NORCPT;
331 }
333 if (!has_sender && !has_from) {
334 DEBUG(3) debugf("adding 'From:' header\n");
335 if (msg->full_sender_name) {
336 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_FROM, "From: \"%s\" <%s@%s>\n", msg->full_sender_name, msg->return_path->local_part, msg->return_path->domain));
337 } else {
338 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_FROM, "From: <%s@%s>\n", msg->return_path->local_part, msg->return_path->domain));
339 }
340 }
341 if (!has_to_or_cc) {
342 DEBUG(3) debugf("no To: or Cc: header, hence adding `To: undisclosed recipients:;'\n");
343 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: undisclosed-recipients:;\n"));
344 }
345 if (!has_date) {
346 DEBUG(3) debugf("adding 'Date:' header\n");
347 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));
348 }
349 if (!has_id) {
350 DEBUG(3) debugf("adding 'Message-ID:' header\n");
351 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));
352 }
353 }
355 /* Received header: */
356 /* At this point because we have to know the rcpts for the 'for' part */
357 /* The `for' part will only be used if exactly one rcpt is present. */
358 gchar *for_string = NULL;
359 header *hdr = NULL;
361 DEBUG(3) debugf("adding 'Received:' header\n");
363 if (g_list_length(msg->rcpt_list) == 1) {
364 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);
365 for_string = g_strdup_printf("\n\tfor %s", addr_string(addr));
366 }
368 if (!msg->received_host) {
369 /* received locally */
370 hdr = create_header(HEAD_RECEIVED,
371 "Received: by %s (%s %s, from userid %d)\n\tid %s%s; %s\n",
372 conf.host_name, PACKAGE, VERSION, geteuid(),
373 msg->uid, for_string ? for_string : "", rec_timestamp());
374 } else {
375 /* received from remote */
376 DEBUG(5) debugf("adding 'Received:' header (5)\n");
377 hdr = create_header(HEAD_RECEIVED,
378 "Received: from %s\n\tby %s with %s (%s %s)\n\tid %s%s; %s\n",
379 msg->received_host,
380 conf.host_name, prot_names[msg->received_prot], PACKAGE,
381 VERSION, msg->uid, for_string ? for_string : "",
382 rec_timestamp());
383 }
384 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
386 if (for_string)
387 g_free(for_string);
389 return AERR_OK;
390 }
392 accept_error
393 accept_message(FILE *in, message *msg, guint flags)
394 {
395 accept_error err;
397 err = accept_message_stream(in, msg, flags);
398 if (err == AERR_OK) {
399 err = accept_message_prepare(msg, flags);
400 }
402 return err;
403 }