masqmail-0.2

annotate src/accept.c @ 175:805abb75b20c

find changesets by author, revision, files, or words in the commit message
removed links to oku's old email address
author meillo@marmaro.de
date Fri, 23 Jul 2010 10:20:27 +0200
parents cd59a5b4d3dd
children ec3fe72a3e99
rev   line source
meillo@0 1 /* MasqMail
meillo@0 2 Copyright (C) 1999-2001 Oliver Kurth
meillo@174 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@10 23 gchar *prot_names[] = {
meillo@10 24 "local",
meillo@10 25 "bsmtp",
meillo@10 26 "smtp",
meillo@10 27 "esmtp",
meillo@10 28 "pop3",
meillo@10 29 "apop",
meillo@10 30 "(unknown)" /* should not happen, but better than crashing. */
meillo@0 31 };
meillo@0 32
meillo@10 33 static gchar*
meillo@10 34 string_base62(gchar * res, guint value, gchar len)
meillo@0 35 {
meillo@10 36 static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
meillo@10 37 gchar *p = res + len;
meillo@14 38 *p = '\0';
meillo@10 39 while (p > res) {
meillo@10 40 *(--p) = base62_chars[value % 62];
meillo@10 41 value /= 62;
meillo@10 42 }
meillo@10 43 return res;
meillo@0 44 }
meillo@0 45
meillo@10 46 static gint
meillo@10 47 _g_list_addr_isequal(gconstpointer a, gconstpointer b)
meillo@0 48 {
meillo@10 49 address *addr1 = (address *) a;
meillo@10 50 address *addr2 = (address *) b;
meillo@10 51 int ret;
meillo@0 52
meillo@10 53 if ((ret = strcasecmp(addr1->domain, addr2->domain)) == 0)
meillo@10 54 return strcmp(addr1->local_part, addr2->local_part);
meillo@10 55 else
meillo@10 56 return ret;
meillo@0 57 }
meillo@0 58
meillo@0 59 /* accept message from anywhere.
meillo@0 60 A locally originating message is indicated by msg->recieved_host == NULL
meillo@0 61
meillo@109 62 The -t option:
meillo@109 63 The ACC_RCPT_FROM_HEAD flag adds the recipients found in To/Cc/Bcc
meillo@109 64 headers to the recipients list.
meillo@109 65 The ACC_DEL_RCPTS flag makes only sense if the ACC_RCPT_FROM_HEAD
meillo@109 66 flag is given too. With ACC_DEL_RCPTS the recipients given on the
meillo@109 67 command line are removed from the ones given in headers.
meillo@0 68 */
meillo@0 69
meillo@10 70 accept_error
meillo@10 71 accept_message_stream(FILE * in, message * msg, guint flags)
meillo@0 72 {
meillo@10 73 gchar *line, *line1;
meillo@10 74 int line_size = MAX_DATALINE;
meillo@10 75 gboolean in_headers = TRUE;
meillo@10 76 header *hdr = NULL;
meillo@10 77 gint line_cnt = 0, data_size = 0;
meillo@0 78
meillo@10 79 line = g_malloc(line_size);
meillo@14 80 line[0] = '\0';
meillo@0 81
meillo@10 82 while (TRUE) {
meillo@10 83 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);
meillo@0 84
meillo@10 85 line1 = line;
meillo@0 86
meillo@110 87 if ((line[0] == '.') && (!(flags & ACC_DOT_IGNORE))) {
meillo@10 88 if (line[1] == '\n') {
meillo@10 89 g_free(line);
meillo@10 90 break;
meillo@10 91 }
meillo@10 92 line1++;
meillo@10 93 }
meillo@10 94
meillo@10 95 if (len <= 0) {
meillo@111 96 if ((len == -1) && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {
meillo@10 97 /* we got an EOF, and the last line was not terminated by a CR */
meillo@10 98 gint len1 = strlen(line1);
meillo@10 99 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */
meillo@10 100 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */
meillo@10 101 line1[len1] = '\n';
meillo@14 102 line1[len1 + 1] = '\0';
meillo@10 103 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10 104 data_size += strlen(line1);
meillo@10 105 line_cnt++;
meillo@10 106 }
meillo@10 107 }
meillo@10 108 break;
meillo@10 109 } else {
meillo@10 110 g_free(line);
meillo@10 111 if (len == -1) {
meillo@10 112 return AERR_EOF;
meillo@10 113 } else if (len == -2) {
meillo@10 114 /* should not happen any more */
meillo@10 115 return AERR_OVERFLOW;
meillo@10 116 } else if (len == -3) {
meillo@10 117 return AERR_TIMEOUT;
meillo@10 118 } else {
meillo@10 119 /* does not happen */
meillo@10 120 DEBUG(5) debugf("read_sockline returned %d\n", len);
meillo@10 121 return AERR_UNKNOWN;
meillo@10 122 }
meillo@10 123 }
meillo@10 124 } else {
meillo@10 125 if (in_headers) {
meillo@10 126
meillo@10 127 /* some pop servers send the 'From ' line, skip it: */
meillo@10 128 if (msg->hdr_list == NULL)
meillo@10 129 if (strncmp(line1, "From ", 5) == 0)
meillo@10 130 continue;
meillo@10 131
meillo@10 132 if (line1[0] == ' ' || line1[0] == '\t') {
meillo@10 133 /* continuation of 'folded' header: */
meillo@10 134 if (hdr) {
meillo@22 135 hdr->header = g_strconcat(hdr->header, line1, NULL);
meillo@10 136 }
meillo@10 137
meillo@10 138 } else if (line1[0] == '\n') {
meillo@10 139 /* an empty line marks end of headers */
meillo@10 140 in_headers = FALSE;
meillo@10 141 } else {
meillo@10 142 /* in all other cases we expect another header */
meillo@10 143 if ((hdr = get_header(line1)))
meillo@10 144 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
meillo@10 145 else {
meillo@10 146 /* if get_header() returns NULL, no header was recognized,
meillo@10 147 so this seems to be the first data line of a broken mailer
meillo@10 148 which does not send an empty line after the headers */
meillo@10 149 in_headers = FALSE;
meillo@10 150 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10 151 }
meillo@10 152 }
meillo@10 153 } else {
meillo@10 154 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10 155 data_size += strlen(line1);
meillo@10 156 line_cnt++;
meillo@10 157 }
meillo@10 158 }
meillo@120 159 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {
meillo@117 160 DEBUG(4) debugf("accept_message_stream(): "
meillo@117 161 "received %d bytes (conf.max_msg_size=%d)\n",
meillo@117 162 data_size, conf.max_msg_size);
meillo@117 163 return AERR_SIZE;
meillo@117 164 }
meillo@117 165
meillo@0 166 }
meillo@0 167
meillo@10 168 if (msg->data_list != NULL)
meillo@10 169 msg->data_list = g_list_reverse(msg->data_list);
meillo@10 170 else
meillo@10 171 /* make sure data list is not NULL: */
meillo@10 172 msg->data_list = g_list_append(NULL, g_strdup(""));
meillo@0 173
meillo@10 174 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);
meillo@10 175 /* we get here after we succesfully received the mail data */
meillo@0 176
meillo@10 177 msg->data_size = data_size;
meillo@10 178 msg->received_time = time(NULL);
meillo@0 179
meillo@10 180 return AERR_OK;
meillo@0 181 }
meillo@0 182
meillo@10 183 accept_error
meillo@10 184 accept_message_prepare(message * msg, guint flags)
meillo@0 185 {
meillo@10 186 struct passwd *passwd = NULL;
meillo@10 187 GList *non_rcpt_list = NULL;
meillo@10 188 time_t rec_time = time(NULL);
meillo@0 189
meillo@10 190 DEBUG(5) debugf("accept_message_prepare()\n");
meillo@0 191
meillo@10 192 /* create unique message id */
meillo@10 193 msg->uid = g_malloc(14);
meillo@0 194
meillo@10 195 string_base62(msg->uid, rec_time, 6);
meillo@10 196 msg->uid[6] = '-';
meillo@10 197 string_base62(&(msg->uid[7]), getpid(), 3);
meillo@10 198 msg->uid[10] = '-';
meillo@10 199 string_base62(&(msg->uid[11]), msg->transfer_id, 2);
meillo@10 200 msg->uid[13] = 0;
meillo@0 201
meillo@10 202 /* if local, get password entry */
meillo@10 203 if (msg->received_host == NULL) {
meillo@10 204 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
meillo@10 205 msg->ident = g_strdup(passwd->pw_name);
meillo@10 206 }
meillo@0 207
meillo@10 208 /* set return path if local */
meillo@22 209 if (msg->return_path == NULL && msg->received_host == NULL) {
meillo@22 210 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);
meillo@22 211 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);
meillo@22 212 msg->return_path = create_address(path, TRUE);
meillo@22 213 g_free(path);
meillo@10 214 }
meillo@0 215
meillo@109 216 /* -t option (see comment above) */
meillo@10 217 if (flags & ACC_DEL_RCPTS) {
meillo@10 218 non_rcpt_list = msg->rcpt_list;
meillo@10 219 msg->rcpt_list = NULL;
meillo@10 220 }
meillo@0 221
meillo@10 222 /* scan headers */
meillo@10 223 {
meillo@10 224 gboolean has_id = FALSE;
meillo@10 225 gboolean has_date = FALSE;
meillo@10 226 gboolean has_sender = FALSE;
meillo@10 227 gboolean has_from = FALSE;
meillo@10 228 gboolean has_to_or_cc = FALSE;
meillo@10 229 GList *hdr_node, *hdr_node_next;
meillo@10 230 header *hdr;
meillo@0 231
meillo@10 232 for (hdr_node = g_list_first(msg->hdr_list);
meillo@10 233 hdr_node != NULL; hdr_node = hdr_node_next) {
meillo@10 234 hdr_node_next = g_list_next(hdr_node);
meillo@10 235 hdr = ((header *) (hdr_node->data));
meillo@10 236 DEBUG(5) debugf("scanning headers: %s", hdr->header);
meillo@10 237 switch (hdr->id) {
meillo@10 238 case HEAD_MESSAGE_ID:
meillo@10 239 has_id = TRUE;
meillo@10 240 break;
meillo@10 241 case HEAD_DATE:
meillo@10 242 has_date = TRUE;
meillo@10 243 break;
meillo@10 244 case HEAD_FROM:
meillo@10 245 has_from = TRUE;
meillo@10 246 break;
meillo@10 247 case HEAD_SENDER:
meillo@10 248 has_sender = TRUE;
meillo@10 249 break;
meillo@10 250 case HEAD_TO:
meillo@10 251 case HEAD_CC:
meillo@106 252 has_to_or_cc = TRUE;
meillo@106 253 /* fall through */
meillo@10 254 case HEAD_BCC:
meillo@10 255 if (flags & ACC_RCPT_FROM_HEAD) {
meillo@109 256 /* -t option (see comment above) */
meillo@10 257 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);
meillo@10 258 if (hdr->value) {
meillo@10 259 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
meillo@10 260 }
meillo@10 261 }
meillo@106 262 if (hdr->id == HEAD_BCC) {
meillo@10 263 DEBUG(3) debugf("removing 'Bcc' header\n");
meillo@10 264 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 265 g_list_free_1(hdr_node);
meillo@10 266 destroy_header(hdr);
meillo@106 267 }
meillo@10 268 break;
meillo@10 269 case HEAD_ENVELOPE_TO:
meillo@10 270 if (flags & ACC_SAVE_ENVELOPE_TO) {
meillo@10 271 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
meillo@22 272 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@22 273 "X-Orig-Envelope-to: %s", hdr->value));
meillo@10 274 }
meillo@10 275 DEBUG(3) debugf("removing 'Envelope-To' header\n");
meillo@10 276 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 277 g_list_free_1(hdr_node);
meillo@10 278 destroy_header(hdr);
meillo@10 279 break;
meillo@10 280 case HEAD_RETURN_PATH:
meillo@10 281 if (flags & ACC_MAIL_FROM_HEAD) {
meillo@10 282 /* usually POP3 accept */
meillo@10 283 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
meillo@10 284 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@10 285 }
meillo@10 286 DEBUG(3) debugf("removing 'Return-Path' header\n");
meillo@10 287 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 288 g_list_free_1(hdr_node);
meillo@10 289 destroy_header(hdr);
meillo@10 290 break;
meillo@10 291 default:
meillo@10 292 break; /* make compiler happy */
meillo@10 293 }
meillo@10 294 }
meillo@10 295
meillo@10 296 if (msg->return_path == NULL) {
meillo@10 297 /* this can happen for pop3 accept only and if no Return-path: header was given */
meillo@10 298 GList *hdr_list;
meillo@10 299 header *hdr;
meillo@10 300
meillo@10 301 DEBUG(3) debugf("return_path == NULL\n");
meillo@10 302
meillo@10 303 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
meillo@10 304 if (!hdr_list)
meillo@10 305 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
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@10 315 if ((msg->return_path = create_address_qualified(addr, FALSE, msg->received_host)) != NULL) {
meillo@10 316 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@13 317 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@13 318 "X-Warning: return path set from %s address\n",
meillo@13 319 hdr->id == HEAD_SENDER ? "Sender:" : "From:"));
meillo@10 320 }
meillo@10 321 g_free(addr);
meillo@10 322 }
meillo@10 323 if (msg->return_path == NULL) { /* no Sender: or From: or create_address_qualified failed */
meillo@10 324 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);
meillo@10 325 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@13 326 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@25 327 "X-Warning: real return path is unknown\n"));
meillo@10 328 }
meillo@10 329 }
meillo@10 330
meillo@10 331 if (flags & ACC_DEL_RCPTS) {
meillo@109 332 /* remove the recipients given on the command line from the ones given in headers
meillo@109 333 -t option (see comment above) */
meillo@10 334 GList *rcpt_node;
meillo@10 335 foreach(non_rcpt_list, rcpt_node) {
meillo@10 336 address *rcpt = (address *) (rcpt_node->data);
meillo@10 337 GList *node;
meillo@10 338 if ((node = g_list_find_custom(msg->rcpt_list, rcpt, _g_list_addr_isequal))) {
meillo@10 339 DEBUG(3) debugf("removing rcpt address %s\n", addr_string(node->data));
meillo@10 340 msg->rcpt_list = g_list_remove_link(msg->rcpt_list, node);
meillo@10 341 destroy_address((address *) (node->data));
meillo@10 342 g_list_free_1(node);
meillo@10 343 }
meillo@10 344 }
meillo@10 345 }
meillo@10 346
meillo@10 347 /* here we should have our recipients, fail if not: */
meillo@10 348 if (msg->rcpt_list == NULL) {
meillo@10 349 logwrite(LOG_WARNING, "no recipients found in message\n");
meillo@10 350 return AERR_NORCPT;
meillo@10 351 }
meillo@10 352
meillo@10 353 if (!(has_sender || has_from)) {
meillo@10 354 DEBUG(3) debugf("adding 'From' header\n");
meillo@10 355 msg->hdr_list = g_list_append(msg->hdr_list,
meillo@10 356 msg->full_sender_name
meillo@10 357 ?
meillo@13 358 create_header(HEAD_FROM, "From: \"%s\" <%s@%s>\n", msg->full_sender_name,
meillo@13 359 msg->return_path->local_part, msg->return_path->domain)
meillo@10 360 :
meillo@10 361 create_header(HEAD_FROM, "From: <%s@%s>\n",
meillo@13 362 msg->return_path->local_part, msg->return_path->domain)
meillo@10 363 );
meillo@10 364 }
meillo@106 365 if (!has_to_or_cc) {
meillo@106 366 DEBUG(3) debugf("no To: or Cc: header, hence adding `To: undisclosed recipients:;'\n");
meillo@105 367 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: undisclosed-recipients:;\n"));
meillo@10 368 }
meillo@10 369 if (!has_date) {
meillo@10 370 DEBUG(3) debugf("adding 'Date:' header\n");
meillo@10 371 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));
meillo@10 372 }
meillo@10 373 if (!has_id) {
meillo@10 374 DEBUG(3) debugf("adding 'Message-ID:' header\n");
meillo@13 375 msg->hdr_list = g_list_append(msg->hdr_list,
meillo@13 376 create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));
meillo@10 377 }
meillo@0 378 }
meillo@10 379
meillo@10 380 /* Received header: */
meillo@10 381 /* At this point because we have to know the rcpts for the 'for' part */
meillo@102 382 gchar *for_string = NULL;
meillo@102 383 header *hdr = NULL;
meillo@10 384
meillo@102 385 DEBUG(3) debugf("adding 'Received:' header\n");
meillo@10 386
meillo@102 387 if (g_list_length(msg->rcpt_list) == 1) {
meillo@102 388 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);
meillo@102 389 for_string = g_strdup_printf(" for %s", addr_string(addr));
meillo@102 390 }
meillo@10 391
meillo@102 392 if (msg->received_host == NULL) {
meillo@102 393 /* received locally */
meillo@102 394 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",
meillo@102 395 passwd->pw_name, conf.host_name, prot_names[msg->received_prot],
meillo@102 396 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());
meillo@102 397 } else {
meillo@102 398 /* received from remote */
meillo@10 399 #ifdef ENABLE_IDENT
meillo@102 400 DEBUG(5) debugf("adding 'Received:' header (5)\n");
meillo@102 401 hdr = create_header(HEAD_RECEIVED, "Received: from %s (ident=%s) by %s with %s (%s %s) id %s%s; %s\n",
meillo@102 402 msg->received_host, msg->ident ? msg->ident : "unknown", conf.host_name,
meillo@102 403 prot_names[msg->received_prot], PACKAGE, VERSION, msg->uid, for_string ? for_string : "",
meillo@102 404 rec_timestamp());
meillo@10 405 #else
meillo@102 406 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",
meillo@102 407 msg->received_host, conf.host_name, prot_names[msg->received_prot],
meillo@102 408 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());
meillo@10 409 #endif
meillo@102 410 }
meillo@102 411 header_fold(hdr);
meillo@102 412 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
meillo@10 413
meillo@102 414 if (for_string)
meillo@102 415 g_free(for_string);
meillo@0 416
meillo@10 417 /* write message to spool: */
meillo@10 418 /* accept is no longer responsible for this
meillo@13 419 if (!spool_write(msg, TRUE))
meillo@13 420 return AERR_NOSPOOL;
meillo@10 421 */
meillo@10 422 return AERR_OK;
meillo@0 423 }
meillo@0 424
meillo@10 425 accept_error
meillo@10 426 accept_message(FILE * in, message * msg, guint flags)
meillo@0 427 {
meillo@10 428 accept_error err;
meillo@0 429
meillo@10 430 err = accept_message_stream(in, msg, flags);
meillo@10 431 if (err == AERR_OK)
meillo@10 432 err = accept_message_prepare(msg, flags);
meillo@0 433
meillo@10 434 return err;
meillo@0 435 }