masqmail

annotate src/accept.c @ 366:41958685480d

find changesets by author, revision, files, or words in the commit message
Switched to `type *name' style Andrew Koenig's ``C Traps and Pitfalls'' (Ch.2.1) convinced me that it is best to go with the way C had been designed. The ``declaration reflects use'' concept conflicts with a ``type* name'' notation. Hence I switched.
author markus schnalke <meillo@marmaro.de>
date Thu, 22 Sep 2011 15:07:40 +0200
parents 9d49dffc3070
children b27f66555ba8
rev   line source
meillo@0 1 /* MasqMail
meillo@0 2 Copyright (C) 1999-2001 Oliver Kurth
meillo@224 3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@0 4
meillo@0 5 This program is free software; you can redistribute it and/or modify
meillo@0 6 it under the terms of the GNU General Public License as published by
meillo@0 7 the Free Software Foundation; either version 2 of the License, or
meillo@0 8 (at your option) any later version.
meillo@0 9
meillo@0 10 This program is distributed in the hope that it will be useful,
meillo@0 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 13 GNU General Public License for more details.
meillo@0 14
meillo@0 15 You should have received a copy of the GNU General Public License
meillo@0 16 along with this program; if not, write to the Free Software
meillo@0 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 18 */
meillo@0 19
meillo@0 20 #include "masqmail.h"
meillo@0 21 #include "readsock.h"
meillo@0 22
meillo@299 23 /* must match PROT_* in masqmail.h */
meillo@10 24 gchar *prot_names[] = {
meillo@10 25 "local",
meillo@299 26 "SMTP",
meillo@299 27 "ESMTP",
meillo@10 28 "(unknown)" /* should not happen, but better than crashing. */
meillo@0 29 };
meillo@0 30
meillo@10 31 static gchar*
meillo@366 32 string_base62(gchar *res, guint value, gchar len)
meillo@0 33 {
meillo@10 34 static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
meillo@10 35 gchar *p = res + len;
meillo@14 36 *p = '\0';
meillo@10 37 while (p > res) {
meillo@10 38 *(--p) = base62_chars[value % 62];
meillo@10 39 value /= 62;
meillo@10 40 }
meillo@10 41 return res;
meillo@0 42 }
meillo@0 43
meillo@10 44 static gint
meillo@10 45 _g_list_addr_isequal(gconstpointer a, gconstpointer b)
meillo@0 46 {
meillo@10 47 address *addr1 = (address *) a;
meillo@10 48 address *addr2 = (address *) b;
meillo@10 49 int ret;
meillo@0 50
meillo@270 51 if ((ret = strcasecmp(addr1->domain, addr2->domain)) == 0) {
meillo@10 52 return strcmp(addr1->local_part, addr2->local_part);
meillo@270 53 }
meillo@270 54 return ret;
meillo@0 55 }
meillo@0 56
meillo@0 57 /* accept message from anywhere.
meillo@276 58 A message from local is indicated by msg->recieved_host == NULL
meillo@0 59
meillo@276 60 The -t option: With the ACC_RCPT_FROM_HEAD flag the addrs found found
meillo@276 61 in To/Cc/Bcc headers are added to the recipient list.
meillo@0 62 */
meillo@0 63
meillo@10 64 accept_error
meillo@366 65 accept_message_stream(FILE *in, message *msg, guint flags)
meillo@0 66 {
meillo@10 67 gchar *line, *line1;
meillo@10 68 int line_size = MAX_DATALINE;
meillo@10 69 gboolean in_headers = TRUE;
meillo@10 70 header *hdr = NULL;
meillo@10 71 gint line_cnt = 0, data_size = 0;
meillo@0 72
meillo@10 73 line = g_malloc(line_size);
meillo@14 74 line[0] = '\0';
meillo@0 75
meillo@10 76 while (TRUE) {
meillo@10 77 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);
meillo@0 78
meillo@10 79 line1 = line;
meillo@0 80
meillo@110 81 if ((line[0] == '.') && (!(flags & ACC_DOT_IGNORE))) {
meillo@10 82 if (line[1] == '\n') {
meillo@10 83 g_free(line);
meillo@10 84 break;
meillo@10 85 }
meillo@10 86 line1++;
meillo@10 87 }
meillo@10 88
meillo@270 89 if ((len == -1) && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {
meillo@270 90 /* we got an EOF, and the last line was not terminated by a CR */
meillo@270 91 gint len1 = strlen(line1);
meillo@270 92 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */
meillo@270 93 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */
meillo@270 94 line1[len1] = '\n';
meillo@270 95 line1[len1 + 1] = '\0';
meillo@270 96 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@270 97 data_size += strlen(line1);
meillo@270 98 line_cnt++;
meillo@10 99 }
meillo@270 100 }
meillo@270 101 break;
meillo@270 102
meillo@270 103 } else if (len == -1) {
meillo@270 104 g_free(line);
meillo@270 105 return AERR_EOF;
meillo@270 106
meillo@270 107 } else if (len == -2) {
meillo@270 108 /* should not happen any more */
meillo@270 109 g_free(line);
meillo@270 110 return AERR_OVERFLOW;
meillo@270 111
meillo@270 112 } else if (len == -3) {
meillo@270 113 g_free(line);
meillo@270 114 return AERR_TIMEOUT;
meillo@270 115
meillo@270 116 } else if (len <= 0) {
meillo@270 117 /* does not happen */
meillo@270 118 g_free(line);
meillo@270 119 DEBUG(5) debugf("read_sockline returned %d\n", len);
meillo@270 120 return AERR_UNKNOWN;
meillo@270 121
meillo@270 122 }
meillo@270 123
meillo@270 124 if (in_headers) {
meillo@270 125
meillo@270 126 /* some pop servers send the 'From ' line, skip it: */
meillo@270 127 if (!msg->hdr_list && strncmp(line1, "From ", 5) == 0) {
meillo@270 128 continue;
meillo@270 129 }
meillo@270 130
meillo@270 131 if (line1[0] == ' ' || line1[0] == '\t') {
meillo@270 132 /* continuation of 'folded' header: */
meillo@270 133 if (hdr) {
meillo@366 134 char *cp;
meillo@323 135 cp = g_strconcat(hdr->header, line1, NULL);
meillo@323 136 hdr->value = cp + (hdr->value - hdr->header);
meillo@323 137 free(hdr->header);
meillo@323 138 hdr->header = cp;
meillo@270 139 }
meillo@270 140
meillo@270 141 } else if (line1[0] == '\n') {
meillo@270 142 /* an empty line marks end of headers */
meillo@270 143 in_headers = FALSE;
meillo@10 144 } else {
meillo@270 145 /* in all other cases we expect another header */
meillo@270 146 if ((hdr = get_header(line1))) {
meillo@270 147 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
meillo@10 148 } else {
meillo@270 149 /* if get_header() returns NULL, no header was recognized,
meillo@270 150 so this seems to be the first data line of a broken mailer
meillo@270 151 which does not send an empty line after the headers */
meillo@270 152 in_headers = FALSE;
meillo@270 153 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10 154 }
meillo@10 155 }
meillo@10 156 } else {
meillo@270 157 /* message body */
meillo@270 158 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@270 159 data_size += strlen(line1);
meillo@270 160 line_cnt++;
meillo@270 161 }
meillo@10 162
meillo@120 163 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {
meillo@117 164 DEBUG(4) debugf("accept_message_stream(): "
meillo@117 165 "received %d bytes (conf.max_msg_size=%d)\n",
meillo@117 166 data_size, conf.max_msg_size);
meillo@117 167 return AERR_SIZE;
meillo@117 168 }
meillo@117 169
meillo@0 170 }
meillo@0 171
meillo@270 172 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);
meillo@270 173
meillo@270 174 if (!msg->data_list) {
meillo@10 175 /* make sure data list is not NULL: */
meillo@10 176 msg->data_list = g_list_append(NULL, g_strdup(""));
meillo@270 177 }
meillo@270 178 msg->data_list = g_list_reverse(msg->data_list);
meillo@0 179
meillo@10 180 /* we get here after we succesfully received the mail data */
meillo@0 181
meillo@10 182 msg->data_size = data_size;
meillo@10 183 msg->received_time = time(NULL);
meillo@0 184
meillo@10 185 return AERR_OK;
meillo@0 186 }
meillo@0 187
meillo@10 188 accept_error
meillo@366 189 accept_message_prepare(message *msg, guint flags)
meillo@0 190 {
meillo@10 191 struct passwd *passwd = NULL;
meillo@10 192 time_t rec_time = time(NULL);
meillo@0 193
meillo@10 194 DEBUG(5) debugf("accept_message_prepare()\n");
meillo@0 195
meillo@10 196 /* create unique message id */
meillo@10 197 msg->uid = g_malloc(14);
meillo@10 198 string_base62(msg->uid, rec_time, 6);
meillo@10 199 msg->uid[6] = '-';
meillo@298 200 string_base62(msg->uid + 7, getpid(), 3);
meillo@10 201 msg->uid[10] = '-';
meillo@298 202 string_base62(msg->uid + 11, msg->transfer_id, 2);
meillo@298 203 msg->uid[13] = '\0';
meillo@0 204
meillo@298 205 /* if local, get password entry and set return path if missing */
meillo@298 206 if (!msg->received_host) {
meillo@10 207 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
meillo@10 208 msg->ident = g_strdup(passwd->pw_name);
meillo@298 209 if (!msg->return_path) {
meillo@298 210 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);
meillo@298 211 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);
meillo@298 212 msg->return_path = create_address(path, TRUE);
meillo@298 213 g_free(path);
meillo@298 214 }
meillo@10 215 }
meillo@0 216
meillo@10 217 /* scan headers */
meillo@10 218 {
meillo@10 219 gboolean has_id = FALSE;
meillo@10 220 gboolean has_date = FALSE;
meillo@10 221 gboolean has_sender = FALSE;
meillo@10 222 gboolean has_from = FALSE;
meillo@10 223 gboolean has_to_or_cc = FALSE;
meillo@10 224 GList *hdr_node, *hdr_node_next;
meillo@10 225 header *hdr;
meillo@0 226
meillo@10 227 for (hdr_node = g_list_first(msg->hdr_list);
meillo@298 228 hdr_node;
meillo@298 229 hdr_node = hdr_node_next) {
meillo@10 230 hdr_node_next = g_list_next(hdr_node);
meillo@10 231 hdr = ((header *) (hdr_node->data));
meillo@10 232 DEBUG(5) debugf("scanning headers: %s", hdr->header);
meillo@10 233 switch (hdr->id) {
meillo@10 234 case HEAD_MESSAGE_ID:
meillo@10 235 has_id = TRUE;
meillo@10 236 break;
meillo@10 237 case HEAD_DATE:
meillo@10 238 has_date = TRUE;
meillo@10 239 break;
meillo@10 240 case HEAD_FROM:
meillo@10 241 has_from = TRUE;
meillo@10 242 break;
meillo@10 243 case HEAD_SENDER:
meillo@10 244 has_sender = TRUE;
meillo@10 245 break;
meillo@10 246 case HEAD_TO:
meillo@10 247 case HEAD_CC:
meillo@106 248 has_to_or_cc = TRUE;
meillo@106 249 /* fall through */
meillo@10 250 case HEAD_BCC:
meillo@10 251 if (flags & ACC_RCPT_FROM_HEAD) {
meillo@109 252 /* -t option (see comment above) */
meillo@10 253 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);
meillo@10 254 if (hdr->value) {
meillo@10 255 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
meillo@10 256 }
meillo@10 257 }
meillo@106 258 if (hdr->id == HEAD_BCC) {
meillo@10 259 DEBUG(3) debugf("removing 'Bcc' header\n");
meillo@10 260 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 261 g_list_free_1(hdr_node);
meillo@10 262 destroy_header(hdr);
meillo@106 263 }
meillo@10 264 break;
meillo@10 265 case HEAD_ENVELOPE_TO:
meillo@10 266 if (flags & ACC_SAVE_ENVELOPE_TO) {
meillo@10 267 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
meillo@22 268 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@276 269 "X-Orig-Envelope-To: %s", hdr->value));
meillo@10 270 }
meillo@10 271 DEBUG(3) debugf("removing 'Envelope-To' header\n");
meillo@10 272 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 273 g_list_free_1(hdr_node);
meillo@10 274 destroy_header(hdr);
meillo@10 275 break;
meillo@10 276 case HEAD_RETURN_PATH:
meillo@10 277 if (flags & ACC_MAIL_FROM_HEAD) {
meillo@10 278 /* usually POP3 accept */
meillo@10 279 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
meillo@10 280 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@10 281 }
meillo@10 282 DEBUG(3) debugf("removing 'Return-Path' header\n");
meillo@10 283 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 284 g_list_free_1(hdr_node);
meillo@10 285 destroy_header(hdr);
meillo@10 286 break;
meillo@10 287 default:
meillo@10 288 break; /* make compiler happy */
meillo@10 289 }
meillo@10 290 }
meillo@10 291
meillo@298 292 if (!msg->return_path) {
meillo@298 293 /* TODO: do we still need this as we don't fetch
meillo@298 294 mail anymore? */
meillo@298 295 /* this can happen for pop3 accept only and if no
meillo@298 296 Return-Path: header was given */
meillo@10 297 GList *hdr_list;
meillo@10 298 header *hdr;
meillo@10 299
meillo@10 300 DEBUG(3) debugf("return_path == NULL\n");
meillo@10 301
meillo@10 302 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
meillo@298 303 if (!hdr_list) {
meillo@10 304 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
meillo@298 305 }
meillo@10 306 if (hdr_list) {
meillo@10 307 gchar *addr;
meillo@10 308 hdr = (header *) (g_list_first(hdr_list)->data);
meillo@10 309
meillo@10 310 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);
meillo@10 311
meillo@10 312 addr = g_strdup(hdr->value);
meillo@10 313 g_strchomp(addr);
meillo@10 314
meillo@299 315 msg->return_path = create_address_qualified(addr, FALSE, msg->received_host);
meillo@298 316 if (msg->return_path) {
meillo@10 317 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@298 318 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:"));
meillo@10 319 }
meillo@10 320 g_free(addr);
meillo@10 321 }
meillo@298 322 if (!msg->return_path) {
meillo@298 323 /* no Sender: or From: or
meillo@298 324 create_address_qualified failed */
meillo@10 325 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);
meillo@10 326 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@298 327 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Warning: real return path is unknown\n"));
meillo@10 328 }
meillo@10 329 }
meillo@10 330
meillo@10 331 /* here we should have our recipients, fail if not: */
meillo@276 332 if (!msg->rcpt_list) {
meillo@10 333 logwrite(LOG_WARNING, "no recipients found in message\n");
meillo@10 334 return AERR_NORCPT;
meillo@10 335 }
meillo@10 336
meillo@299 337 if (!has_sender && !has_from) {
meillo@298 338 DEBUG(3) debugf("adding 'From:' header\n");
meillo@298 339 if (msg->full_sender_name) {
meillo@298 340 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));
meillo@298 341 } else {
meillo@298 342 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));
meillo@298 343 }
meillo@10 344 }
meillo@106 345 if (!has_to_or_cc) {
meillo@106 346 DEBUG(3) debugf("no To: or Cc: header, hence adding `To: undisclosed recipients:;'\n");
meillo@105 347 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: undisclosed-recipients:;\n"));
meillo@10 348 }
meillo@10 349 if (!has_date) {
meillo@10 350 DEBUG(3) debugf("adding 'Date:' header\n");
meillo@10 351 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));
meillo@10 352 }
meillo@10 353 if (!has_id) {
meillo@10 354 DEBUG(3) debugf("adding 'Message-ID:' header\n");
meillo@298 355 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));
meillo@10 356 }
meillo@0 357 }
meillo@10 358
meillo@10 359 /* Received header: */
meillo@10 360 /* At this point because we have to know the rcpts for the 'for' part */
meillo@298 361 /* The `for' part will only be used if exactly one rcpt is present. */
meillo@102 362 gchar *for_string = NULL;
meillo@102 363 header *hdr = NULL;
meillo@10 364
meillo@102 365 DEBUG(3) debugf("adding 'Received:' header\n");
meillo@10 366
meillo@102 367 if (g_list_length(msg->rcpt_list) == 1) {
meillo@102 368 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);
meillo@304 369 for_string = g_strdup_printf("\n\tfor %s", addr_string(addr));
meillo@102 370 }
meillo@10 371
meillo@289 372 if (!msg->received_host) {
meillo@102 373 /* received locally */
meillo@289 374 hdr = create_header(HEAD_RECEIVED,
meillo@304 375 "Received: by %s (%s %s, from userid %d)\n\tid %s%s; %s\n",
meillo@304 376 conf.host_name, PACKAGE, VERSION, geteuid(),
meillo@289 377 msg->uid, for_string ? for_string : "", rec_timestamp());
meillo@102 378 } else {
meillo@102 379 /* received from remote */
meillo@102 380 DEBUG(5) debugf("adding 'Received:' header (5)\n");
meillo@289 381 hdr = create_header(HEAD_RECEIVED,
meillo@362 382 #ifdef ENABLE_IDENT
meillo@304 383 "Received: from %s (ident=%s)\n\tby %s with %s (%s %s)\n\tid %s%s; %s\n",
meillo@289 384 msg->received_host, msg->ident ? msg->ident : "unknown",
meillo@362 385 #else
meillo@362 386 "Received: from %s\n\tby %s with %s (%s %s)\n\tid %s%s; %s\n",
meillo@362 387 msg->received_host,
meillo@362 388 #endif
meillo@289 389 conf.host_name, prot_names[msg->received_prot], PACKAGE,
meillo@289 390 VERSION, msg->uid, for_string ? for_string : "",
meillo@289 391 rec_timestamp());
meillo@102 392 }
meillo@102 393 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
meillo@10 394
meillo@102 395 if (for_string)
meillo@102 396 g_free(for_string);
meillo@0 397
meillo@10 398 return AERR_OK;
meillo@0 399 }
meillo@0 400
meillo@10 401 accept_error
meillo@366 402 accept_message(FILE *in, message *msg, guint flags)
meillo@0 403 {
meillo@10 404 accept_error err;
meillo@0 405
meillo@10 406 err = accept_message_stream(in, msg, flags);
meillo@270 407 if (err == AERR_OK) {
meillo@10 408 err = accept_message_prepare(msg, flags);
meillo@270 409 }
meillo@0 410
meillo@10 411 return err;
meillo@0 412 }