masqmail: src/accept.c annotate

masqmail

annotate src/accept.c @ 312:c74adb7c4f50

null-terminated the decoded base64 strings The returned size is still the same. I only alloced one byte more and filled it with zero. TODO: I'm not sure if the allocated size is exact. It's large enough but maybe too large.

author	meillo@marmaro.de
date	Sun, 24 Apr 2011 20:13:47 +0200
parents	3e3c280ca5b2
children	29de6a1c4538

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@10	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@10	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@270	134 hdr->header = g_strconcat(hdr->header, line1, NULL);
meillo@270	135 }
meillo@270	136
meillo@270	137 } else if (line1[0] == '\n') {
meillo@270	138 /* an empty line marks end of headers */
meillo@270	139 in_headers = FALSE;
meillo@10	140 } else {
meillo@270	141 /* in all other cases we expect another header */
meillo@270	142 if ((hdr = get_header(line1))) {
meillo@270	143 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
meillo@10	144 } else {
meillo@270	145 /* if get_header() returns NULL, no header was recognized,
meillo@270	146 so this seems to be the first data line of a broken mailer
meillo@270	147 which does not send an empty line after the headers */
meillo@270	148 in_headers = FALSE;
meillo@270	149 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@10	150 }
meillo@10	151 }
meillo@10	152 } else {
meillo@270	153 /* message body */
meillo@270	154 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));
meillo@270	155 data_size += strlen(line1);
meillo@270	156 line_cnt++;
meillo@270	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@270	168 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);
meillo@270	169
meillo@270	170 if (!msg->data_list) {
meillo@10	171 /* make sure data list is not NULL: */
meillo@10	172 msg->data_list = g_list_append(NULL, g_strdup(""));
meillo@270	173 }
meillo@270	174 msg->data_list = g_list_reverse(msg->data_list);
meillo@0	175
meillo@10	176 /* we get here after we succesfully received the mail data */
meillo@0	177
meillo@10	178 msg->data_size = data_size;
meillo@10	179 msg->received_time = time(NULL);
meillo@0	180
meillo@10	181 return AERR_OK;
meillo@0	182 }
meillo@0	183
meillo@10	184 accept_error
meillo@10	185 accept_message_prepare(message * msg, guint flags)
meillo@0	186 {
meillo@10	187 struct passwd *passwd = 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@10	194 string_base62(msg->uid, rec_time, 6);
meillo@10	195 msg->uid[6] = '-';
meillo@298	196 string_base62(msg->uid + 7, getpid(), 3);
meillo@10	197 msg->uid[10] = '-';
meillo@298	198 string_base62(msg->uid + 11, msg->transfer_id, 2);
meillo@298	199 msg->uid[13] = '\0';
meillo@0	200
meillo@298	201 /* if local, get password entry and set return path if missing */
meillo@298	202 if (!msg->received_host) {
meillo@10	203 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
meillo@10	204 msg->ident = g_strdup(passwd->pw_name);
meillo@298	205 if (!msg->return_path) {
meillo@298	206 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);
meillo@298	207 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);
meillo@298	208 msg->return_path = create_address(path, TRUE);
meillo@298	209 g_free(path);
meillo@298	210 }
meillo@10	211 }
meillo@0	212
meillo@10	213 /* scan headers */
meillo@10	214 {
meillo@10	215 gboolean has_id = FALSE;
meillo@10	216 gboolean has_date = FALSE;
meillo@10	217 gboolean has_sender = FALSE;
meillo@10	218 gboolean has_from = FALSE;
meillo@10	219 gboolean has_to_or_cc = FALSE;
meillo@10	220 GList hdr_node, hdr_node_next;
meillo@10	221 header *hdr;
meillo@0	222
meillo@10	223 for (hdr_node = g_list_first(msg->hdr_list);
meillo@298	224 hdr_node;
meillo@298	225 hdr_node = hdr_node_next) {
meillo@10	226 hdr_node_next = g_list_next(hdr_node);
meillo@10	227 hdr = ((header *) (hdr_node->data));
meillo@10	228 DEBUG(5) debugf("scanning headers: %s", hdr->header);
meillo@10	229 switch (hdr->id) {
meillo@10	230 case HEAD_MESSAGE_ID:
meillo@10	231 has_id = TRUE;
meillo@10	232 break;
meillo@10	233 case HEAD_DATE:
meillo@10	234 has_date = TRUE;
meillo@10	235 break;
meillo@10	236 case HEAD_FROM:
meillo@10	237 has_from = TRUE;
meillo@10	238 break;
meillo@10	239 case HEAD_SENDER:
meillo@10	240 has_sender = TRUE;
meillo@10	241 break;
meillo@10	242 case HEAD_TO:
meillo@10	243 case HEAD_CC:
meillo@106	244 has_to_or_cc = TRUE;
meillo@106	245 /* fall through */
meillo@10	246 case HEAD_BCC:
meillo@10	247 if (flags & ACC_RCPT_FROM_HEAD) {
meillo@109	248 /* -t option (see comment above) */
meillo@10	249 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);
meillo@10	250 if (hdr->value) {
meillo@10	251 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
meillo@10	252 }
meillo@10	253 }
meillo@106	254 if (hdr->id == HEAD_BCC) {
meillo@10	255 DEBUG(3) debugf("removing 'Bcc' header\n");
meillo@10	256 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10	257 g_list_free_1(hdr_node);
meillo@10	258 destroy_header(hdr);
meillo@106	259 }
meillo@10	260 break;
meillo@10	261 case HEAD_ENVELOPE_TO:
meillo@10	262 if (flags & ACC_SAVE_ENVELOPE_TO) {
meillo@10	263 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
meillo@22	264 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,
meillo@276	265 "X-Orig-Envelope-To: %s", hdr->value));
meillo@10	266 }
meillo@10	267 DEBUG(3) debugf("removing 'Envelope-To' header\n");
meillo@10	268 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10	269 g_list_free_1(hdr_node);
meillo@10	270 destroy_header(hdr);
meillo@10	271 break;
meillo@10	272 case HEAD_RETURN_PATH:
meillo@10	273 if (flags & ACC_MAIL_FROM_HEAD) {
meillo@10	274 /* usually POP3 accept */
meillo@10	275 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
meillo@10	276 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));
meillo@10	277 }
meillo@10	278 DEBUG(3) debugf("removing 'Return-Path' header\n");
meillo@10	279 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@10	280 g_list_free_1(hdr_node);
meillo@10	281 destroy_header(hdr);
meillo@10	282 break;
meillo@10	283 default:
meillo@10	284 break; /* make compiler happy */
meillo@10	285 }
meillo@10	286 }
meillo@10	287
meillo@298	288 if (!msg->return_path) {
meillo@298	289 /* TODO: do we still need this as we don't fetch
meillo@298	290 mail anymore? */
meillo@298	291 /* this can happen for pop3 accept only and if no
meillo@298	292 Return-Path: header was given */
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@10	376 #ifdef ENABLE_IDENT
meillo@102	377 DEBUG(5) debugf("adding 'Received:' header (5)\n");
meillo@289	378 hdr = create_header(HEAD_RECEIVED,
meillo@304	379 "Received: from %s (ident=%s)\n\tby %s with %s (%s %s)\n\tid %s%s; %s\n",
meillo@289	380 msg->received_host, msg->ident ? msg->ident : "unknown",
meillo@289	381 conf.host_name, prot_names[msg->received_prot], PACKAGE,
meillo@289	382 VERSION, msg->uid, for_string ? for_string : "",
meillo@289	383 rec_timestamp());
meillo@10	384 #else
meillo@289	385 hdr = create_header(HEAD_RECEIVED,
meillo@304	386 "Received: from %s\n\tby %s with %s (%s %s)\n\tid %s%s; %s\n",
meillo@289	387 msg->received_host, conf.host_name,
meillo@289	388 prot_names[msg->received_prot], PACKAGE, VERSION,
meillo@289	389 msg->uid, for_string ? for_string : "", rec_timestamp());
meillo@10	390 #endif
meillo@102	391 }
meillo@102	392 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
meillo@10	393
meillo@102	394 if (for_string)
meillo@102	395 g_free(for_string);
meillo@0	396
meillo@10	397 return AERR_OK;
meillo@0	398 }
meillo@0	399
meillo@10	400 accept_error
meillo@10	401 accept_message(FILE * in, message * msg, guint flags)
meillo@0	402 {
meillo@10	403 accept_error err;
meillo@0	404
meillo@10	405 err = accept_message_stream(in, msg, flags);
meillo@270	406 if (err == AERR_OK) {
meillo@10	407 err = accept_message_prepare(msg, flags);
meillo@270	408 }
meillo@0	409
meillo@10	410 return err;
meillo@0	411 }