masqmail

annotate src/accept.c @ 387:a408411ff8df

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Added a glob-pattern aliasing facility. One use-case is virtual hosting another catch-all maildrops, but you may use it as a more flexible aliasing mechanism as well.
author markus schnalke <meillo@marmaro.de>
date Sat, 18 Feb 2012 12:35:12 +0100
parents 9bc3e47b0222
children aa40710f09fe
rev   line source
meillo@367 1 /*
meillo@367 2 ** MasqMail
meillo@367 3 ** Copyright (C) 1999-2001 Oliver Kurth
meillo@367 4 ** Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@367 5 **
meillo@367 6 ** This program is free software; you can redistribute it and/or modify
meillo@367 7 ** it under the terms of the GNU General Public License as published by
meillo@367 8 ** the Free Software Foundation; either version 2 of the License, or
meillo@367 9 ** (at your option) any later version.
meillo@367 10 **
meillo@367 11 ** This program is distributed in the hope that it will be useful,
meillo@367 12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@367 13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@367 14 ** GNU General Public License for more details.
meillo@367 15 **
meillo@367 16 ** You should have received a copy of the GNU General Public License
meillo@367 17 ** along with this program; if not, write to the Free Software
meillo@367 18 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 19 */
meillo@0 20
meillo@0 21 #include "masqmail.h"
meillo@0 22 #include "readsock.h"
meillo@0 23
meillo@299 24 /* must match PROT_* in masqmail.h */
meillo@10 25 gchar *prot_names[] = {
meillo@10 26 "local",
meillo@299 27 "SMTP",
meillo@299 28 "ESMTP",
meillo@10 29 "(unknown)" /* should not happen, but better than crashing. */
meillo@0 30 };
meillo@0 31
meillo@10 32 static gchar*
meillo@366 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@367 45 /*
meillo@367 46 ** accept message from anywhere.
meillo@367 47 ** A message from local is indicated by msg->recieved_host == NULL
meillo@367 48 **
meillo@367 49 ** The -t option: With the ACC_RCPT_FROM_HEAD flag the addrs found found
meillo@367 50 ** in To/Cc/Bcc headers are added to the recipient list.
meillo@0 51 */
meillo@0 52
meillo@10 53 accept_error
meillo@366 54 accept_message_stream(FILE *in, message *msg, guint flags)
meillo@0 55 {
meillo@10 56 gchar *line, *line1;
meillo@10 57 int line_size = MAX_DATALINE;
meillo@10 58 gboolean in_headers = TRUE;
meillo@10 59 header *hdr = NULL;
meillo@10 60 gint line_cnt = 0, data_size = 0;
meillo@0 61
meillo@10 62 line = g_malloc(line_size);
meillo@14 63 line[0] = '\0';
meillo@0 64
meillo@10 65 while (TRUE) {
meillo@10 66 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);
meillo@0 67
meillo@10 68 line1 = line;
meillo@0 69
meillo@110 70 if ((line[0] == '.') && (!(flags & ACC_DOT_IGNORE))) {
meillo@10 71 if (line[1] == '\n') {
meillo@10 72 g_free(line);
meillo@10 73 break;
meillo@10 74 }
meillo@10 75 line1++;
meillo@10 76 }
meillo@10 77
meillo@270 78 if ((len == -1) && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {
meillo@270 79 /* we got an EOF, and the last line was not terminated by a CR */
meillo@270 80 gint len1 = strlen(line1);
meillo@270 81 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */
meillo@270 82 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */
meillo@270 83 line1[len1] = '\n';
meillo@270 84 line1[len1 + 1] = '\0';
meillo@270 85 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@270 86 data_size += strlen(line1);
meillo@270 87 line_cnt++;
meillo@10 88 }
meillo@270 89 }
meillo@270 90 break;
meillo@270 91
meillo@270 92 } else if (len == -1) {
meillo@270 93 g_free(line);
meillo@270 94 return AERR_EOF;
meillo@270 95
meillo@270 96 } else if (len == -2) {
meillo@270 97 /* should not happen any more */
meillo@270 98 g_free(line);
meillo@270 99 return AERR_OVERFLOW;
meillo@270 100
meillo@270 101 } else if (len == -3) {
meillo@270 102 g_free(line);
meillo@270 103 return AERR_TIMEOUT;
meillo@270 104
meillo@270 105 } else if (len <= 0) {
meillo@270 106 /* does not happen */
meillo@270 107 g_free(line);
meillo@270 108 DEBUG(5) debugf("read_sockline returned %d\n", len);
meillo@270 109 return AERR_UNKNOWN;
meillo@270 110
meillo@270 111 }
meillo@270 112
meillo@270 113 if (in_headers) {
meillo@270 114
meillo@270 115 /* some pop servers send the 'From ' line, skip it: */
meillo@270 116 if (!msg->hdr_list && strncmp(line1, "From ", 5) == 0) {
meillo@270 117 continue;
meillo@270 118 }
meillo@270 119
meillo@270 120 if (line1[0] == ' ' || line1[0] == '\t') {
meillo@270 121 /* continuation of 'folded' header: */
meillo@270 122 if (hdr) {
meillo@366 123 char *cp;
meillo@323 124 cp = g_strconcat(hdr->header, line1, NULL);
meillo@323 125 hdr->value = cp + (hdr->value - hdr->header);
meillo@323 126 free(hdr->header);
meillo@323 127 hdr->header = cp;
meillo@270 128 }
meillo@270 129
meillo@270 130 } else if (line1[0] == '\n') {
meillo@270 131 /* an empty line marks end of headers */
meillo@270 132 in_headers = FALSE;
meillo@10 133 } else {
meillo@270 134 /* in all other cases we expect another header */
meillo@270 135 if ((hdr = get_header(line1))) {
meillo@270 136 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
meillo@10 137 } else {
meillo@367 138 /*
meillo@367 139 ** if get_header() returns NULL,
meillo@367 140 ** no header was recognized,
meillo@367 141 ** so this seems to be the first
meillo@367 142 ** data line of a broken mailer
meillo@367 143 ** which does not send an empty
meillo@367 144 ** line after the headers
meillo@367 145 */
meillo@270 146 in_headers = FALSE;
meillo@270 147 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10 148 }
meillo@10 149 }
meillo@10 150 } else {
meillo@270 151 /* message body */
meillo@270 152 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@270 153 data_size += strlen(line1);
meillo@270 154 line_cnt++;
meillo@270 155 }
meillo@10 156
meillo@120 157 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {
meillo@117 158 DEBUG(4) debugf("accept_message_stream(): "
meillo@117 159 "received %d bytes (conf.max_msg_size=%d)\n",
meillo@117 160 data_size, conf.max_msg_size);
meillo@117 161 return AERR_SIZE;
meillo@117 162 }
meillo@117 163
meillo@0 164 }
meillo@0 165
meillo@270 166 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);
meillo@270 167
meillo@270 168 if (!msg->data_list) {
meillo@10 169 /* make sure data list is not NULL: */
meillo@10 170 msg->data_list = g_list_append(NULL, g_strdup(""));
meillo@270 171 }
meillo@270 172 msg->data_list = g_list_reverse(msg->data_list);
meillo@0 173
meillo@10 174 /* we get here after we succesfully received the mail data */
meillo@0 175
meillo@10 176 msg->data_size = data_size;
meillo@10 177 msg->received_time = time(NULL);
meillo@0 178
meillo@10 179 return AERR_OK;
meillo@0 180 }
meillo@0 181
meillo@10 182 accept_error
meillo@366 183 accept_message_prepare(message *msg, guint flags)
meillo@0 184 {
meillo@10 185 struct passwd *passwd = NULL;
meillo@10 186 time_t rec_time = time(NULL);
meillo@0 187
meillo@10 188 DEBUG(5) debugf("accept_message_prepare()\n");
meillo@0 189
meillo@10 190 /* create unique message id */
meillo@10 191 msg->uid = g_malloc(14);
meillo@10 192 string_base62(msg->uid, rec_time, 6);
meillo@10 193 msg->uid[6] = '-';
meillo@298 194 string_base62(msg->uid + 7, getpid(), 3);
meillo@10 195 msg->uid[10] = '-';
meillo@298 196 string_base62(msg->uid + 11, msg->transfer_id, 2);
meillo@298 197 msg->uid[13] = '\0';
meillo@0 198
meillo@298 199 /* if local, get password entry and set return path if missing */
meillo@298 200 if (!msg->received_host) {
meillo@10 201 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
meillo@10 202 msg->ident = g_strdup(passwd->pw_name);
meillo@298 203 if (!msg->return_path) {
meillo@298 204 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);
meillo@298 205 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);
meillo@298 206 msg->return_path = create_address(path, TRUE);
meillo@298 207 g_free(path);
meillo@298 208 }
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_to_or_cc = FALSE;
meillo@10 218 GList *hdr_node, *hdr_node_next;
meillo@10 219 header *hdr;
meillo@0 220
meillo@10 221 for (hdr_node = g_list_first(msg->hdr_list);
meillo@298 222 hdr_node;
meillo@298 223 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@106 242 has_to_or_cc = TRUE;
meillo@106 243 /* fall through */
meillo@10 244 case HEAD_BCC:
meillo@10 245 if (flags & ACC_RCPT_FROM_HEAD) {
meillo@109 246 /* -t option (see comment above) */
meillo@10 247 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);
meillo@10 248 if (hdr->value) {
meillo@10 249 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
meillo@10 250 }
meillo@10 251 }
meillo@106 252 if (hdr->id == HEAD_BCC) {
meillo@10 253 DEBUG(3) debugf("removing 'Bcc' header\n");
meillo@10 254 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 255 g_list_free_1(hdr_node);
meillo@10 256 destroy_header(hdr);
meillo@106 257 }
meillo@10 258 break;
meillo@10 259 case HEAD_ENVELOPE_TO:
meillo@10 260 if (flags & ACC_SAVE_ENVELOPE_TO) {
meillo@10 261 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
meillo@22 262 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@276 263 "X-Orig-Envelope-To: %s", hdr->value));
meillo@10 264 }
meillo@10 265 DEBUG(3) debugf("removing 'Envelope-To' header\n");
meillo@10 266 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 267 g_list_free_1(hdr_node);
meillo@10 268 destroy_header(hdr);
meillo@10 269 break;
meillo@10 270 case HEAD_RETURN_PATH:
meillo@10 271 if (flags & ACC_MAIL_FROM_HEAD) {
meillo@10 272 /* usually POP3 accept */
meillo@10 273 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
meillo@10 274 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@10 275 }
meillo@10 276 DEBUG(3) debugf("removing 'Return-Path' header\n");
meillo@10 277 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10 278 g_list_free_1(hdr_node);
meillo@10 279 destroy_header(hdr);
meillo@10 280 break;
meillo@10 281 default:
meillo@10 282 break; /* make compiler happy */
meillo@10 283 }
meillo@10 284 }
meillo@10 285
meillo@298 286 if (!msg->return_path) {
meillo@367 287 /*
meillo@367 288 ** TODO: do we still need this as we don't fetch
meillo@367 289 ** mail anymore?
meillo@367 290 ** This can happen for pop3 accept only and if no
meillo@367 291 ** Return-Path: header was given
meillo@367 292 */
meillo@10 293 GList *hdr_list;
meillo@10 294 header *hdr;
meillo@10 295
meillo@10 296 DEBUG(3) debugf("return_path == NULL\n");
meillo@10 297
meillo@10 298 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
meillo@298 299 if (!hdr_list) {
meillo@10 300 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
meillo@298 301 }
meillo@10 302 if (hdr_list) {
meillo@10 303 gchar *addr;
meillo@10 304 hdr = (header *) (g_list_first(hdr_list)->data);
meillo@10 305
meillo@10 306 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);
meillo@10 307
meillo@10 308 addr = g_strdup(hdr->value);
meillo@10 309 g_strchomp(addr);
meillo@10 310
meillo@299 311 msg->return_path = create_address_qualified(addr, FALSE, msg->received_host);
meillo@298 312 if (msg->return_path) {
meillo@10 313 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@298 314 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:"));
meillo@10 315 }
meillo@10 316 g_free(addr);
meillo@10 317 }
meillo@298 318 if (!msg->return_path) {
meillo@298 319 /* no Sender: or From: or
meillo@298 320 create_address_qualified failed */
meillo@10 321 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);
meillo@10 322 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@298 323 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Warning: real return path is unknown\n"));
meillo@10 324 }
meillo@10 325 }
meillo@10 326
meillo@10 327 /* here we should have our recipients, fail if not: */
meillo@276 328 if (!msg->rcpt_list) {
meillo@10 329 logwrite(LOG_WARNING, "no recipients found in message\n");
meillo@10 330 return AERR_NORCPT;
meillo@10 331 }
meillo@10 332
meillo@299 333 if (!has_sender && !has_from) {
meillo@298 334 DEBUG(3) debugf("adding 'From:' header\n");
meillo@298 335 if (msg->full_sender_name) {
meillo@298 336 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));
meillo@298 337 } else {
meillo@298 338 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));
meillo@298 339 }
meillo@10 340 }
meillo@106 341 if (!has_to_or_cc) {
meillo@106 342 DEBUG(3) debugf("no To: or Cc: header, hence adding `To: undisclosed recipients:;'\n");
meillo@105 343 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: undisclosed-recipients:;\n"));
meillo@10 344 }
meillo@10 345 if (!has_date) {
meillo@10 346 DEBUG(3) debugf("adding 'Date:' header\n");
meillo@10 347 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));
meillo@10 348 }
meillo@10 349 if (!has_id) {
meillo@10 350 DEBUG(3) debugf("adding 'Message-ID:' header\n");
meillo@298 351 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));
meillo@10 352 }
meillo@0 353 }
meillo@10 354
meillo@10 355 /* Received header: */
meillo@10 356 /* At this point because we have to know the rcpts for the 'for' part */
meillo@298 357 /* The `for' part will only be used if exactly one rcpt is present. */
meillo@102 358 gchar *for_string = NULL;
meillo@102 359 header *hdr = NULL;
meillo@10 360
meillo@102 361 DEBUG(3) debugf("adding 'Received:' header\n");
meillo@10 362
meillo@102 363 if (g_list_length(msg->rcpt_list) == 1) {
meillo@102 364 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);
meillo@304 365 for_string = g_strdup_printf("\n\tfor %s", addr_string(addr));
meillo@102 366 }
meillo@10 367
meillo@289 368 if (!msg->received_host) {
meillo@102 369 /* received locally */
meillo@289 370 hdr = create_header(HEAD_RECEIVED,
meillo@304 371 "Received: by %s (%s %s, from userid %d)\n\tid %s%s; %s\n",
meillo@304 372 conf.host_name, PACKAGE, VERSION, geteuid(),
meillo@289 373 msg->uid, for_string ? for_string : "", rec_timestamp());
meillo@102 374 } else {
meillo@102 375 /* received from remote */
meillo@102 376 DEBUG(5) debugf("adding 'Received:' header (5)\n");
meillo@289 377 hdr = create_header(HEAD_RECEIVED,
meillo@362 378 "Received: from %s\n\tby %s with %s (%s %s)\n\tid %s%s; %s\n",
meillo@362 379 msg->received_host,
meillo@289 380 conf.host_name, prot_names[msg->received_prot], PACKAGE,
meillo@289 381 VERSION, msg->uid, for_string ? for_string : "",
meillo@289 382 rec_timestamp());
meillo@102 383 }
meillo@102 384 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
meillo@10 385
meillo@102 386 if (for_string)
meillo@102 387 g_free(for_string);
meillo@0 388
meillo@10 389 return AERR_OK;
meillo@0 390 }
meillo@0 391
meillo@10 392 accept_error
meillo@366 393 accept_message(FILE *in, message *msg, guint flags)
meillo@0 394 {
meillo@10 395 accept_error err;
meillo@0 396
meillo@10 397 err = accept_message_stream(in, msg, flags);
meillo@270 398 if (err == AERR_OK) {
meillo@10 399 err = accept_message_prepare(msg, flags);
meillo@270 400 }
meillo@0 401
meillo@10 402 return err;
meillo@0 403 }