masqmail

annotate src/accept.c @ 23:4a3bc3a7afbe

find changesets by author, revision, files, or words in the commit message
refactoring: early exit instead of deep if levels
author meillo@marmaro.de
date Fri, 05 Dec 2008 11:32:26 +0100
parents a8f3424347dc
children d04fbd5ce16e
rev   line source
meillo@0 1 /* MasqMail
meillo@0 2 Copyright (C) 1999-2001 Oliver Kurth
meillo@0 3
meillo@0 4 This program is free software; you can redistribute it and/or modify
meillo@0 5 it under the terms of the GNU General Public License as published by
meillo@0 6 the Free Software Foundation; either version 2 of the License, or
meillo@0 7 (at your option) any later version.
meillo@0 8
meillo@0 9 This program is distributed in the hope that it will be useful,
meillo@0 10 but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 12 GNU General Public License for more details.
meillo@0 13
meillo@0 14 You should have received a copy of the GNU General Public License
meillo@0 15 along with this program; if not, write to the Free Software
meillo@0 16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 17 */
meillo@0 18
meillo@0 19 #include "masqmail.h"
meillo@0 20 #include "readsock.h"
meillo@0 21
meillo@10 22 gchar *prot_names[] = {
meillo@10 23 "local",
meillo@10 24 "bsmtp",
meillo@10 25 "smtp",
meillo@10 26 "esmtp",
meillo@10 27 "pop3",
meillo@10 28 "apop",
meillo@10 29 "(unknown)" /* should not happen, but better than crashing. */
meillo@0 30 };
meillo@0 31
meillo@10 32 static gchar*
meillo@10 33 string_base62(gchar * res, guint value, gchar len)
meillo@0 34 {
meillo@10 35 static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
meillo@10 36 gchar *p = res + len;
meillo@14 37 *p = '\0';
meillo@10 38 while (p > res) {
meillo@10 39 *(--p) = base62_chars[value % 62];
meillo@10 40 value /= 62;
meillo@10 41 }
meillo@10 42 return res;
meillo@0 43 }
meillo@0 44
meillo@10 45 static gint
meillo@10 46 _g_list_addr_isequal(gconstpointer a, gconstpointer b)
meillo@0 47 {
meillo@10 48 address *addr1 = (address *) a;
meillo@10 49 address *addr2 = (address *) b;
meillo@10 50 int ret;
meillo@0 51
meillo@10 52 if ((ret = strcasecmp(addr1->domain, addr2->domain)) == 0)
meillo@10 53 return strcmp(addr1->local_part, addr2->local_part);
meillo@10 54 else
meillo@10 55 return ret;
meillo@0 56 }
meillo@0 57
meillo@0 58 /* accept message from anywhere.
meillo@0 59 A locally originating message is indicated by msg->recieved_host == NULL
meillo@0 60
meillo@0 61 If the flags ACC_DEL_RCPTS is set, recipients in the msg->rcpt_list is
meillo@0 62 copied and items occuring in it will be removed from the newly constructed
meillo@0 63 (from To/Cc/Bcc headers if ACC_RCPT_TO is set) rcpt_list.
meillo@0 64 */
meillo@0 65
meillo@10 66 accept_error
meillo@10 67 accept_message_stream(FILE * in, message * msg, guint flags)
meillo@0 68 {
meillo@10 69 gchar *line, *line1;
meillo@10 70 int line_size = MAX_DATALINE;
meillo@10 71 gboolean in_headers = TRUE;
meillo@10 72 header *hdr = NULL;
meillo@10 73 gint line_cnt = 0, data_size = 0;
meillo@0 74
meillo@10 75 line = g_malloc(line_size);
meillo@14 76 line[0] = '\0';
meillo@0 77
meillo@10 78 while (TRUE) {
meillo@10 79 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);
meillo@0 80
meillo@10 81 line1 = line;
meillo@0 82
meillo@10 83 if ((line[0] == '.') && (!(flags & ACC_NODOT_TERM))) {
meillo@10 84 if (line[1] == '\n') {
meillo@10 85 g_free(line);
meillo@10 86 break;
meillo@10 87 }
meillo@10 88 line1++;
meillo@10 89 }
meillo@10 90
meillo@10 91 if (len <= 0) {
meillo@10 92 if ((len == -1) && ((flags & ACC_NODOT_TERM) || (flags & ACC_NODOT_RELAX))) {
meillo@10 93 /* we got an EOF, and the last line was not terminated by a CR */
meillo@10 94 gint len1 = strlen(line1);
meillo@10 95 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */
meillo@10 96 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */
meillo@10 97 line1[len1] = '\n';
meillo@14 98 line1[len1 + 1] = '\0';
meillo@10 99 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10 100 data_size += strlen(line1);
meillo@10 101 line_cnt++;
meillo@10 102 }
meillo@10 103 }
meillo@10 104 break;
meillo@10 105 } else {
meillo@10 106 g_free(line);
meillo@10 107 if (len == -1) {
meillo@10 108 return AERR_EOF;
meillo@10 109 } else if (len == -2) {
meillo@10 110 /* should not happen any more */
meillo@10 111 return AERR_OVERFLOW;
meillo@10 112 } else if (len == -3) {
meillo@10 113 return AERR_TIMEOUT;
meillo@10 114 } else {
meillo@10 115 /* does not happen */
meillo@10 116 DEBUG(5) debugf("read_sockline returned %d\n", len);
meillo@10 117 return AERR_UNKNOWN;
meillo@10 118 }
meillo@10 119 }
meillo@10 120 } else {
meillo@10 121 if (in_headers) {
meillo@10 122
meillo@10 123 /* some pop servers send the 'From ' line, skip it: */
meillo@10 124 if (msg->hdr_list == NULL)
meillo@10 125 if (strncmp(line1, "From ", 5) == 0)
meillo@10 126 continue;
meillo@10 127
meillo@10 128 if (line1[0] == ' ' || line1[0] == '\t') {
meillo@10 129 /* continuation of 'folded' header: */
meillo@10 130 if (hdr) {
meillo@22 131 hdr->header = g_strconcat(hdr->header, line1, NULL);
meillo@10 132 }
meillo@10 133
meillo@10 134 } else if (line1[0] == '\n') {
meillo@10 135 /* an empty line marks end of headers */
meillo@10 136 in_headers = FALSE;
meillo@10 137 } else {
meillo@10 138 /* in all other cases we expect another header */
meillo@10 139 if ((hdr = get_header(line1)))
meillo@10 140 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
meillo@10 141 else {
meillo@10 142 /* if get_header() returns NULL, no header was recognized,
meillo@10 143 so this seems to be the first data line of a broken mailer
meillo@10 144 which does not send an empty line after the headers */
meillo@10 145 in_headers = FALSE;
meillo@10 146 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10 147 }
meillo@10 148 }
meillo@10 149 } else {
meillo@10 150 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10 151 data_size += strlen(line1);
meillo@10 152 line_cnt++;
meillo@10 153 }
meillo@10 154 }
meillo@0 155 }
meillo@0 156
meillo@10 157 if (msg->data_list != NULL)
meillo@10 158 msg->data_list = g_list_reverse(msg->data_list);
meillo@10 159 else
meillo@10 160 /* make sure data list is not NULL: */
meillo@10 161 msg->data_list = g_list_append(NULL, g_strdup(""));
meillo@0 162
meillo@10 163 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);
meillo@10 164 /* we get here after we succesfully received the mail data */
meillo@0 165
meillo@10 166 msg->data_size = data_size;
meillo@10 167 msg->received_time = time(NULL);
meillo@0 168
meillo@10 169 return AERR_OK;
meillo@0 170 }
meillo@0 171
meillo@10 172 accept_error
meillo@10 173 accept_message_prepare(message * msg, guint flags)
meillo@0 174 {
meillo@10 175 struct passwd *passwd = NULL;
meillo@10 176 GList *non_rcpt_list = NULL;
meillo@10 177 time_t rec_time = time(NULL);
meillo@0 178
meillo@10 179 DEBUG(5) debugf("accept_message_prepare()\n");
meillo@0 180
meillo@10 181 /* create unique message id */
meillo@10 182 msg->uid = g_malloc(14);
meillo@0 183
meillo@10 184 string_base62(msg->uid, rec_time, 6);
meillo@10 185 msg->uid[6] = '-';
meillo@10 186 string_base62(&(msg->uid[7]), getpid(), 3);
meillo@10 187 msg->uid[10] = '-';
meillo@10 188 string_base62(&(msg->uid[11]), msg->transfer_id, 2);
meillo@10 189 msg->uid[13] = 0;
meillo@0 190
meillo@10 191 /* if local, get password entry */
meillo@10 192 if (msg->received_host == NULL) {
meillo@10 193 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
meillo@10 194 msg->ident = g_strdup(passwd->pw_name);
meillo@10 195 }
meillo@0 196
meillo@10 197 /* set return path if local */
meillo@22 198 if (msg->return_path == NULL && msg->received_host == NULL) {
meillo@22 199 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);
meillo@22 200 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);
meillo@22 201 msg->return_path = create_address(path, TRUE);
meillo@22 202 g_free(path);
meillo@10 203 }
meillo@0 204
meillo@10 205 /* -t option */
meillo@10 206 if (flags & ACC_DEL_RCPTS) {
meillo@10 207 non_rcpt_list = msg->rcpt_list;
meillo@10 208 msg->rcpt_list = NULL;
meillo@10 209 }
meillo@0 210
meillo@10 211 /* scan headers */
meillo@10 212 {
meillo@10 213 gboolean has_id = FALSE;
meillo@10 214 gboolean has_date = FALSE;
meillo@10 215 gboolean has_sender = FALSE;
meillo@10 216 gboolean has_from = FALSE;
meillo@10 217 gboolean has_rcpt = FALSE;
meillo@10 218 gboolean has_to_or_cc = FALSE;
meillo@10 219 GList *hdr_node, *hdr_node_next;
meillo@10 220 header *hdr;
meillo@0 221
meillo@10 222 for (hdr_node = g_list_first(msg->hdr_list);
meillo@10 223 hdr_node != NULL; hdr_node = hdr_node_next) {
meillo@10 224 hdr_node_next = g_list_next(hdr_node);
meillo@10 225 hdr = ((header *) (hdr_node->data));
meillo@10 226 DEBUG(5) debugf("scanning headers: %s", hdr->header);
meillo@10 227 switch (hdr->id) {
meillo@10 228 case HEAD_MESSAGE_ID:
meillo@10 229 has_id = TRUE;
meillo@10 230 break;
meillo@10 231 case HEAD_DATE:
meillo@10 232 has_date = TRUE;
meillo@10 233 break;
meillo@10 234 case HEAD_FROM:
meillo@10 235 has_from = TRUE;
meillo@10 236 break;
meillo@10 237 case HEAD_SENDER:
meillo@10 238 has_sender = TRUE;
meillo@10 239 break;
meillo@10 240 case HEAD_TO:
meillo@10 241 case HEAD_CC:
meillo@10 242 case HEAD_BCC:
meillo@10 243 has_rcpt = TRUE;
meillo@10 244 if (flags & ACC_RCPT_FROM_HEAD) {
meillo@10 245 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);
meillo@10 246 if (hdr->value) {
meillo@10 247 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
meillo@10 248 }
meillo@10 249 }
meillo@10 250 if ((flags & ACC_DEL_BCC) && (hdr->id == HEAD_BCC)) {
meillo@10 251 DEBUG(3) debugf("removing 'Bcc' header\n");
meillo@10 252 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 253 g_list_free_1(hdr_node);
meillo@10 254 destroy_header(hdr);
meillo@10 255 } else
meillo@10 256 has_to_or_cc = TRUE;
meillo@10 257 break;
meillo@10 258 case HEAD_ENVELOPE_TO:
meillo@10 259 if (flags & ACC_SAVE_ENVELOPE_TO) {
meillo@10 260 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
meillo@22 261 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@22 262 "X-Orig-Envelope-to: %s", hdr->value));
meillo@10 263 }
meillo@10 264 DEBUG(3) debugf("removing 'Envelope-To' header\n");
meillo@10 265 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 266 g_list_free_1(hdr_node);
meillo@10 267 destroy_header(hdr);
meillo@10 268 break;
meillo@10 269 case HEAD_RETURN_PATH:
meillo@10 270 if (flags & ACC_MAIL_FROM_HEAD) {
meillo@10 271 /* usually POP3 accept */
meillo@10 272 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
meillo@10 273 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@10 274 }
meillo@10 275 DEBUG(3) debugf("removing 'Return-Path' 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 default:
meillo@10 281 break; /* make compiler happy */
meillo@10 282 }
meillo@10 283 }
meillo@10 284
meillo@10 285 if (msg->return_path == NULL) {
meillo@10 286 /* this can happen for pop3 accept only and if no Return-path: header was given */
meillo@10 287 GList *hdr_list;
meillo@10 288 header *hdr;
meillo@10 289
meillo@10 290 DEBUG(3) debugf("return_path == NULL\n");
meillo@10 291
meillo@10 292 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
meillo@10 293 if (!hdr_list)
meillo@10 294 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
meillo@10 295 if (hdr_list) {
meillo@10 296 gchar *addr;
meillo@10 297 hdr = (header *) (g_list_first(hdr_list)->data);
meillo@10 298
meillo@10 299 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);
meillo@10 300
meillo@10 301 addr = g_strdup(hdr->value);
meillo@10 302 g_strchomp(addr);
meillo@10 303
meillo@10 304 if ((msg->return_path = create_address_qualified(addr, FALSE, msg->received_host)) != NULL) {
meillo@10 305 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@13 306 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@13 307 "X-Warning: return path set from %s address\n",
meillo@13 308 hdr->id == HEAD_SENDER ? "Sender:" : "From:"));
meillo@10 309 }
meillo@10 310 g_free(addr);
meillo@10 311 }
meillo@10 312 if (msg->return_path == NULL) { /* no Sender: or From: or create_address_qualified failed */
meillo@10 313 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);
meillo@10 314 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@13 315 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@13 316 "X-Warning: real return path is unkown\n"));
meillo@10 317 }
meillo@10 318 }
meillo@10 319
meillo@10 320 if (flags & ACC_DEL_RCPTS) {
meillo@10 321 GList *rcpt_node;
meillo@10 322 foreach(non_rcpt_list, rcpt_node) {
meillo@10 323 address *rcpt = (address *) (rcpt_node->data);
meillo@10 324 GList *node;
meillo@10 325 if ((node = g_list_find_custom(msg->rcpt_list, rcpt, _g_list_addr_isequal))) {
meillo@10 326 DEBUG(3) debugf("removing rcpt address %s\n", addr_string(node->data));
meillo@10 327 msg->rcpt_list = g_list_remove_link(msg->rcpt_list, node);
meillo@10 328 destroy_address((address *) (node->data));
meillo@10 329 g_list_free_1(node);
meillo@10 330 }
meillo@10 331 }
meillo@10 332 }
meillo@10 333
meillo@10 334 /* here we should have our recipients, fail if not: */
meillo@10 335 if (msg->rcpt_list == NULL) {
meillo@10 336 logwrite(LOG_WARNING, "no recipients found in message\n");
meillo@10 337 return AERR_NORCPT;
meillo@10 338 }
meillo@10 339
meillo@10 340 if (!(has_sender || has_from)) {
meillo@10 341 DEBUG(3) debugf("adding 'From' header\n");
meillo@10 342 msg->hdr_list = g_list_append(msg->hdr_list,
meillo@10 343 msg->full_sender_name
meillo@10 344 ?
meillo@13 345 create_header(HEAD_FROM, "From: \"%s\" <%s@%s>\n", msg->full_sender_name,
meillo@13 346 msg->return_path->local_part, msg->return_path->domain)
meillo@10 347 :
meillo@10 348 create_header(HEAD_FROM, "From: <%s@%s>\n",
meillo@13 349 msg->return_path->local_part, msg->return_path->domain)
meillo@10 350 );
meillo@10 351 }
meillo@10 352 if ((flags & ACC_HEAD_FROM_RCPT) && !has_rcpt) {
meillo@10 353 GList *node;
meillo@10 354 DEBUG(3) debugf("adding 'To' header(s)\n");
meillo@10 355 for (node = g_list_first(msg->rcpt_list); node; node = g_list_next(node)) {
meillo@13 356 msg->hdr_list = g_list_append(msg->hdr_list,
meillo@13 357 create_header(HEAD_TO, "To: %s\n", addr_string(msg-> return_path)));
meillo@10 358 }
meillo@10 359 }
meillo@10 360 if ((flags & ACC_DEL_BCC) && !has_to_or_cc) {
meillo@10 361 /* Bcc headers have been removed, and there are no remaining rcpt headers */
meillo@10 362 DEBUG(3) debugf("adding empty 'Bcc:' header\n");
meillo@10 363 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_BCC, "Bcc:\n"));
meillo@10 364 }
meillo@10 365 if (!has_date) {
meillo@10 366 DEBUG(3) debugf("adding 'Date:' header\n");
meillo@10 367 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));
meillo@10 368 }
meillo@10 369 if (!has_id) {
meillo@10 370 DEBUG(3) debugf("adding 'Message-ID:' header\n");
meillo@13 371 msg->hdr_list = g_list_append(msg->hdr_list,
meillo@13 372 create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));
meillo@10 373 }
meillo@0 374 }
meillo@10 375
meillo@10 376 /* Received header: */
meillo@10 377 /* At this point because we have to know the rcpts for the 'for' part */
meillo@10 378 if (!(flags & ACC_NO_RECVD_HDR)) {
meillo@10 379 gchar *for_string = NULL;
meillo@10 380 header *hdr = NULL;
meillo@10 381
meillo@10 382 DEBUG(3) debugf("adding 'Received:' header\n");
meillo@10 383
meillo@10 384 if (g_list_length(msg->rcpt_list) == 1) {
meillo@10 385 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);
meillo@10 386 for_string = g_strdup_printf(" for %s", addr_string(addr));
meillo@10 387 }
meillo@10 388
meillo@10 389 if (msg->received_host == NULL) {
meillo@13 390 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",
meillo@13 391 passwd->pw_name, conf.host_name, prot_names[msg->received_prot],
meillo@13 392 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());
meillo@10 393 } else {
meillo@10 394 #ifdef ENABLE_IDENT
meillo@10 395 DEBUG(5) debugf("adding 'Received:' header (5)\n");
meillo@13 396 hdr = create_header(HEAD_RECEIVED, "Received: from %s (ident=%s) by %s with %s (%s %s) id %s%s; %s\n",
meillo@13 397 msg->received_host, msg->ident ? msg->ident : "unknown", conf.host_name,
meillo@13 398 prot_names[msg->received_prot], PACKAGE, VERSION, msg->uid, for_string ? for_string : "",
meillo@10 399 rec_timestamp());
meillo@10 400 #else
meillo@13 401 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",
meillo@13 402 msg->received_host, conf.host_name, prot_names[msg->received_prot],
meillo@13 403 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());
meillo@10 404 #endif
meillo@10 405 }
meillo@10 406 header_fold(hdr);
meillo@10 407 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
meillo@10 408
meillo@10 409 if (for_string)
meillo@10 410 g_free(for_string);
meillo@0 411 }
meillo@0 412
meillo@10 413 /* write message to spool: */
meillo@10 414 /* accept is no longer responsible for this
meillo@13 415 if (!spool_write(msg, TRUE))
meillo@13 416 return AERR_NOSPOOL;
meillo@10 417 */
meillo@10 418 return AERR_OK;
meillo@0 419 }
meillo@0 420
meillo@10 421 accept_error
meillo@10 422 accept_message(FILE * in, message * msg, guint flags)
meillo@0 423 {
meillo@10 424 accept_error err;
meillo@0 425
meillo@10 426 err = accept_message_stream(in, msg, flags);
meillo@10 427 if (err == AERR_OK)
meillo@10 428 err = accept_message_prepare(msg, flags);
meillo@0 429
meillo@10 430 return err;
meillo@0 431 }