masqmail

annotate src/smtp_out.c @ 228:9397d10fd771

find changesets by author, revision, files, or words in the commit message
updated date and version of man pages
author meillo@marmaro.de
date Fri, 23 Jul 2010 12:08:41 +0200
parents 996b53a50f55
children 4cff8638dd9b
rev   line source
meillo@224 1 /* smtp_out.c
meillo@224 2 Copyright (C) 1999-2001 Oliver Kurth
meillo@224 3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@224 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@10 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., 675 Mass Ave, Cambridge, MA 02139, USA.
meillo@0 18 */
meillo@0 19
meillo@0 20 /*
meillo@0 21 I always forget these rfc numbers:
meillo@0 22 RFC 821 (SMTP)
meillo@0 23 RFC 1869 (ESMTP)
meillo@0 24 RFC 1870 (ESMTP SIZE)
meillo@0 25 RFC 2197 (ESMTP PIPELINE)
meillo@0 26 RFC 2554 (ESMTP AUTH)
meillo@0 27 */
meillo@0 28
meillo@0 29 #include "masqmail.h"
meillo@0 30 #include "smtp_out.h"
meillo@0 31 #include "readsock.h"
meillo@0 32
meillo@0 33 #ifdef ENABLE_AUTH
meillo@0 34
meillo@0 35 #ifdef USE_LIB_CRYPTO
meillo@0 36 #include <openssl/hmac.h>
meillo@0 37 #include <openssl/md5.h>
meillo@0 38 #include <openssl/evp.h>
meillo@0 39 #else
meillo@0 40 #include "md5/md5.h"
meillo@0 41 #include "md5/hmac_md5.h"
meillo@0 42 #endif
meillo@0 43
meillo@0 44 #include "base64/base64.h"
meillo@0 45 #endif
meillo@0 46
meillo@10 47 void
meillo@10 48 destroy_smtpbase(smtp_base * psb)
meillo@0 49 {
meillo@10 50 fclose(psb->in);
meillo@10 51 fclose(psb->out);
meillo@0 52
meillo@10 53 close(psb->sock);
meillo@0 54
meillo@10 55 if (psb->helo_name)
meillo@10 56 g_free(psb->helo_name);
meillo@10 57 if (psb->buffer)
meillo@10 58 g_free(psb->buffer);
meillo@10 59 if (psb->auth_names)
meillo@10 60 g_strfreev(psb->auth_names);
meillo@0 61
meillo@10 62 if (psb->auth_name)
meillo@10 63 g_free(psb->auth_name);
meillo@10 64 if (psb->auth_login)
meillo@10 65 g_free(psb->auth_login);
meillo@10 66 if (psb->auth_secret)
meillo@10 67 g_free(psb->auth_secret);
meillo@0 68 }
meillo@0 69
meillo@10 70 gchar*
meillo@10 71 set_heloname(smtp_base * psb, gchar * default_name, gboolean do_correct)
meillo@0 72 {
meillo@10 73 struct sockaddr_in sname;
meillo@10 74 int len = sizeof(struct sockaddr_in);
meillo@10 75 struct hostent *host_entry;
meillo@0 76
meillo@10 77 if (do_correct) {
meillo@10 78 getsockname(psb->sock, (struct sockaddr *) (&sname), &len);
meillo@10 79 DEBUG(5) debugf("socket: name.sin_addr = %s\n", inet_ntoa(sname.sin_addr));
meillo@10 80 host_entry = gethostbyaddr((const char *) &(sname.sin_addr), sizeof(sname.sin_addr), AF_INET);
meillo@10 81 if (host_entry) {
meillo@10 82 psb->helo_name = g_strdup(host_entry->h_name);
meillo@10 83 } else {
meillo@10 84 /* we failed to look up our own name. Instead of giving our local hostname,
meillo@10 85 we may give our IP number to show the server that we are at least
meillo@10 86 willing to be honest. For the really picky ones. */
meillo@10 87 DEBUG(5) debugf("failed to look up own host name.\n");
meillo@10 88 psb->helo_name = g_strdup_printf("[%s]", inet_ntoa(sname.sin_addr));
meillo@10 89 }
meillo@10 90 DEBUG(5) debugf("helo_name = %s\n", psb->helo_name);
meillo@10 91 }
meillo@10 92 if (psb->helo_name == NULL) {
meillo@10 93 psb->helo_name = g_strdup(default_name);
meillo@10 94 }
meillo@10 95 return psb->helo_name;
meillo@10 96 }
meillo@0 97
meillo@0 98 #ifdef ENABLE_AUTH
meillo@0 99
meillo@10 100 gboolean
meillo@10 101 set_auth(smtp_base * psb, gchar * name, gchar * login, gchar * secret)
meillo@0 102 {
meillo@10 103 if ((strcasecmp(name, "CRAM-MD5") == 0) || (strcasecmp(name, "LOGIN") == 0)) {
meillo@10 104 psb->auth_name = g_strdup(name);
meillo@10 105 psb->auth_login = g_strdup(login);
meillo@10 106 psb->auth_secret = g_strdup(secret);
meillo@10 107
meillo@10 108 return TRUE;
meillo@10 109 }
meillo@10 110 return FALSE;
meillo@0 111 }
meillo@0 112
meillo@0 113 #endif
meillo@0 114
meillo@10 115 static smtp_base*
meillo@10 116 create_smtpbase(gint sock)
meillo@0 117 {
meillo@10 118 gint dup_sock;
meillo@0 119
meillo@10 120 smtp_base *psb = (smtp_base *) g_malloc(sizeof(smtp_base));
meillo@0 121
meillo@10 122 psb->sock = sock;
meillo@0 123
meillo@10 124 psb->use_esmtp = FALSE;
meillo@10 125 psb->use_size = FALSE;
meillo@10 126 psb->use_pipelining = FALSE;
meillo@10 127 psb->use_auth = FALSE;
meillo@0 128
meillo@10 129 psb->max_size = 0;
meillo@10 130 psb->auth_names = NULL;
meillo@0 131
meillo@10 132 psb->buffer = (gchar *) g_malloc(SMTP_BUF_LEN);
meillo@0 133
meillo@10 134 dup_sock = dup(sock);
meillo@10 135 psb->out = fdopen(sock, "w");
meillo@10 136 psb->in = fdopen(dup_sock, "r");
meillo@0 137
meillo@10 138 psb->error = smtp_ok;
meillo@0 139
meillo@10 140 psb->helo_name = NULL;
meillo@0 141
meillo@10 142 psb->auth_name = psb->auth_login = psb->auth_secret = NULL;
meillo@10 143
meillo@10 144 return psb;
meillo@0 145 }
meillo@0 146
meillo@10 147 static gboolean
meillo@10 148 read_response(smtp_base * psb, int timeout)
meillo@0 149 {
meillo@10 150 gint buf_pos = 0;
meillo@10 151 gchar code[5];
meillo@10 152 gint i, len;
meillo@0 153
meillo@10 154 do {
meillo@10 155 len = read_sockline(psb->in, &(psb->buffer[buf_pos]), SMTP_BUF_LEN - buf_pos, timeout, READSOCKL_CHUG);
meillo@10 156 if (len == -3) {
meillo@10 157 psb->error = smtp_timeout;
meillo@10 158 return FALSE;
meillo@10 159 } else if (len == -2) {
meillo@10 160 psb->error = smtp_syntax;
meillo@10 161 return FALSE;
meillo@10 162 } else if (len == -1) {
meillo@10 163 psb->error = smtp_eof;
meillo@10 164 return FALSE;
meillo@10 165 }
meillo@10 166 for (i = 0; i < 4; i++)
meillo@10 167 code[i] = psb->buffer[buf_pos + i];
meillo@15 168 code[i] = '\0';
meillo@10 169 psb->last_code = atoi(code);
meillo@0 170
meillo@10 171 buf_pos += len;
meillo@0 172
meillo@10 173 } while (code[3] == '-');
meillo@177 174 if (psb->buffer) {
meillo@177 175 DEBUG(4) debugf("S: %s\n", psb->buffer);
meillo@177 176 }
meillo@0 177
meillo@10 178 return TRUE;
meillo@0 179 }
meillo@0 180
meillo@10 181 static gboolean
meillo@10 182 check_response(smtp_base * psb, gboolean after_data)
meillo@0 183 {
meillo@10 184 char c = psb->buffer[0];
meillo@0 185
meillo@10 186 if (((c == '2') && !after_data) || ((c == '3') && after_data)) {
meillo@10 187 psb->error = smtp_ok;
meillo@176 188 DEBUG(6) debugf("response OK:'%s' after_data = %d\n", psb->buffer, (int) after_data);
meillo@10 189 return TRUE;
meillo@10 190 } else {
meillo@10 191 if (c == '4')
meillo@10 192 psb->error = smtp_trylater;
meillo@10 193 else if (c == '5')
meillo@10 194 psb->error = smtp_fail;
meillo@10 195 else
meillo@10 196 psb->error = smtp_syntax;
meillo@176 197 DEBUG(6) debugf("response failure:'%s' after_data = %d\n", psb->buffer, (int) after_data);
meillo@10 198 return FALSE;
meillo@10 199 }
meillo@0 200 }
meillo@0 201
meillo@10 202 static gboolean
meillo@10 203 check_init_response(smtp_base * psb)
meillo@0 204 {
meillo@10 205 if (check_response(psb, FALSE)) {
meillo@10 206 psb->use_esmtp = (strstr(psb->buffer, "ESMTP") != NULL);
meillo@0 207
meillo@10 208 DEBUG(4) debugf(psb->use_esmtp ? "uses esmtp\n" : "no esmtp\n");
meillo@0 209
meillo@10 210 return TRUE;
meillo@10 211 }
meillo@10 212 return FALSE;
meillo@0 213 }
meillo@0 214
meillo@10 215 static gchar*
meillo@10 216 get_response_arg(gchar * response)
meillo@0 217 {
meillo@10 218 gchar buf[SMTP_BUF_LEN];
meillo@10 219 gchar *p = response, *q = buf;
meillo@0 220
meillo@10 221 while (*p && (*p != '\n') && isspace(*p))
meillo@10 222 p++;
meillo@10 223 if (*p && (*p != '\n')) {
meillo@10 224 while (*p && (*p != '\n') && (*p != '\r') && (q < buf + SMTP_BUF_LEN - 1))
meillo@10 225 *(q++) = *(p++);
meillo@15 226 *q = '\0';
meillo@10 227 return g_strdup(buf);
meillo@10 228 }
meillo@10 229 return NULL;
meillo@0 230 }
meillo@0 231
meillo@10 232 static gboolean
meillo@10 233 check_helo_response(smtp_base * psb)
meillo@0 234 {
meillo@222 235 gchar *ptr;
meillo@0 236
meillo@10 237 if (!check_response(psb, FALSE))
meillo@10 238 return FALSE;
meillo@0 239
meillo@222 240 if (psb->last_code == 220) {
meillo@222 241 logwrite(LOG_NOTICE, "received a 220 greeting after sending EHLO,\n");
meillo@222 242 logwrite(LOG_NOTICE, "please remove `instant_helo' from your route config\n");
meillo@222 243 /* read the next response, cause that's the actual helo response */
meillo@222 244 if (!read_response(psb, SMTP_CMD_TIMEOUT) || !check_response(psb, FALSE)) {
meillo@222 245 return FALSE;
meillo@222 246 }
meillo@222 247 }
meillo@222 248
meillo@222 249 ptr = psb->buffer;
meillo@222 250
meillo@10 251 while (*ptr) {
meillo@10 252 if (strncasecmp(&(ptr[4]), "SIZE", 4) == 0) {
meillo@10 253 gchar *arg;
meillo@10 254 psb->use_size = TRUE;
meillo@10 255 arg = get_response_arg(&(ptr[8]));
meillo@10 256 if (arg) {
meillo@10 257 psb->max_size = atoi(arg);
meillo@10 258 g_free(arg);
meillo@10 259 }
meillo@10 260 }
meillo@0 261
meillo@10 262 if (strncasecmp(&(ptr[4]), "PIPELINING", 10) == 0)
meillo@10 263 psb->use_pipelining = TRUE;
meillo@0 264
meillo@10 265 if (strncasecmp(&(ptr[4]), "AUTH", 4) == 0) {
meillo@10 266 if ((ptr[8] == ' ') || (ptr[8] == '=') || (ptr[8] == '\t')) { /* not sure about '\t' */
meillo@10 267 gchar *arg;
meillo@10 268 psb->use_auth = TRUE;
meillo@10 269 arg = get_response_arg(&(ptr[9])); /* after several years I finally learnt to count */
meillo@10 270 if (arg) {
meillo@10 271 psb->auth_names = g_strsplit(arg, " ", 0);
meillo@10 272 g_free(arg);
meillo@10 273
meillo@10 274 DEBUG(4) {
meillo@10 275 gint i = 0;
meillo@114 276 debugf("in check_helo_response()\n");
meillo@10 277 while (psb->auth_names[i]) {
meillo@114 278 debugf(" offered AUTH %s\n", psb->auth_names[i]);
meillo@10 279 i++;
meillo@10 280 }
meillo@10 281 }
meillo@10 282 }
meillo@10 283 }
meillo@10 284 }
meillo@10 285
meillo@10 286 while (*ptr != '\n')
meillo@10 287 ptr++;
meillo@10 288 ptr++;
meillo@0 289 }
meillo@0 290
meillo@10 291 DEBUG(4) {
meillo@114 292 debugf(" %s\n", psb->use_size ? "uses SIZE" : "no size");
meillo@114 293 debugf(" %s\n", psb->use_pipelining ? "uses PIPELINING" : "no pipelining");
meillo@114 294 debugf(" %s\n", psb->use_auth ? "uses AUTH" : "no auth");
meillo@10 295 }
meillo@0 296
meillo@10 297 return TRUE;
meillo@0 298 }
meillo@0 299
meillo@10 300 static gboolean
meillo@10 301 smtp_helo(smtp_base * psb, gchar * helo)
meillo@0 302 {
meillo@10 303 while (TRUE) {
meillo@10 304 if (psb->use_esmtp) {
meillo@10 305 fprintf(psb->out, "EHLO %s\r\n", helo);
meillo@10 306 fflush(psb->out);
meillo@0 307
meillo@177 308 DEBUG(4) debugf("C: EHLO %s\r\n", helo);
meillo@0 309
meillo@10 310 } else {
meillo@10 311 fprintf(psb->out, "HELO %s\r\n", helo);
meillo@10 312 fflush(psb->out);
meillo@0 313
meillo@177 314 DEBUG(4) debugf("C: HELO %s\r\n", helo);
meillo@0 315
meillo@10 316 }
meillo@0 317
meillo@10 318 if (!read_response(psb, SMTP_CMD_TIMEOUT))
meillo@10 319 return FALSE;
meillo@10 320
meillo@10 321 if (check_helo_response(psb))
meillo@10 322 return TRUE;
meillo@10 323 else {
meillo@10 324 if (psb->error == smtp_fail) {
meillo@10 325 if (psb->use_esmtp) {
meillo@10 326 /* our guess that server understands EHLO was wrong, try again with HELO */
meillo@10 327 psb->use_esmtp = FALSE;
meillo@10 328 } else {
meillo@10 329 /* what sort of server ist THAT ?! give up... */
meillo@10 330 return FALSE;
meillo@10 331 }
meillo@10 332 } else
meillo@10 333 return FALSE;
meillo@10 334 }
meillo@0 335 }
meillo@0 336 }
meillo@0 337
meillo@10 338 static void
meillo@10 339 smtp_cmd_mailfrom(smtp_base * psb, address * return_path, guint size)
meillo@0 340 {
meillo@10 341 if (psb->use_size) {
meillo@10 342 fprintf(psb->out, "MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@10 343 fflush(psb->out);
meillo@0 344
meillo@177 345 DEBUG(4) debugf("C: MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@0 346
meillo@10 347 } else {
meillo@10 348 fprintf(psb->out, "MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 349 fflush(psb->out);
meillo@0 350
meillo@177 351 DEBUG(4) debugf("C: MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 352 }
meillo@0 353 }
meillo@0 354
meillo@10 355 static void
meillo@10 356 smtp_cmd_rcptto(smtp_base * psb, address * rcpt)
meillo@0 357 {
meillo@10 358 fprintf(psb->out, "RCPT TO:%s\r\n", addr_string(rcpt));
meillo@10 359 fflush(psb->out);
meillo@177 360 DEBUG(4) debugf("C: RCPT TO:%s\n", addr_string(rcpt));
meillo@0 361 }
meillo@0 362
meillo@10 363 static void
meillo@10 364 send_data_line(smtp_base * psb, gchar * data)
meillo@0 365 {
meillo@10 366 /* According to RFC 821 each line should be terminated with CRLF.
meillo@10 367 Since a dot on a line itself marks the end of data, each line
meillo@10 368 beginning with a dot is prepended with another dot.
meillo@10 369 */
meillo@10 370 gchar *ptr;
meillo@15 371 gboolean new_line = TRUE; /* previous versions assumed that each item was exactly one line.
meillo@15 372 This is no longer the case */
meillo@0 373
meillo@10 374 ptr = data;
meillo@10 375 while (*ptr) {
meillo@10 376 int c = (int) (*ptr);
meillo@119 377 if (c == '.' && new_line) {
meillo@119 378 /* dot-stuffing */
meillo@119 379 putc('.', psb->out);
meillo@119 380 }
meillo@10 381 if (c == '\n') {
meillo@119 382 /* CRLF line terminators */
meillo@10 383 putc('\r', psb->out);
meillo@10 384 putc('\n', psb->out);
meillo@10 385 new_line = TRUE;
meillo@10 386 } else {
meillo@10 387 putc(c, psb->out);
meillo@10 388 new_line = FALSE;
meillo@10 389 }
meillo@10 390 ptr++;
meillo@10 391 }
meillo@0 392 }
meillo@0 393
meillo@10 394 static void
meillo@10 395 send_header(smtp_base * psb, GList * hdr_list)
meillo@0 396 {
meillo@10 397 GList *node;
meillo@10 398 gint num_hdrs = 0;
meillo@0 399
meillo@10 400 /* header */
meillo@10 401 if (hdr_list) {
meillo@10 402 foreach(hdr_list, node) {
meillo@10 403 if (node->data) {
meillo@10 404 header *hdr = (header *) (node->data);
meillo@10 405 if (hdr->header) {
meillo@10 406 send_data_line(psb, hdr->header);
meillo@10 407 num_hdrs++;
meillo@10 408 }
meillo@10 409 }
meillo@10 410 }
meillo@0 411 }
meillo@0 412
meillo@10 413 /* empty line separating headers from data: */
meillo@10 414 putc('\r', psb->out);
meillo@10 415 putc('\n', psb->out);
meillo@0 416
meillo@10 417 DEBUG(4) debugf("sent %d headers\n", num_hdrs);
meillo@0 418 }
meillo@0 419
meillo@10 420 static void
meillo@10 421 send_data(smtp_base * psb, message * msg)
meillo@0 422 {
meillo@10 423 GList *node;
meillo@10 424 gint num_lines = 0;
meillo@0 425
meillo@10 426 /* data */
meillo@10 427 if (msg->data_list) {
meillo@10 428 for (node = g_list_first(msg->data_list); node; node = g_list_next(node)) {
meillo@10 429 if (node->data) {
meillo@10 430 send_data_line(psb, node->data);
meillo@10 431 num_lines++;
meillo@10 432 }
meillo@10 433 }
meillo@10 434 }
meillo@0 435
meillo@10 436 DEBUG(4) debugf("sent %d lines of data\n", num_lines);
meillo@0 437
meillo@10 438 fprintf(psb->out, ".\r\n");
meillo@10 439 fflush(psb->out);
meillo@177 440 DEBUG(4) debugf("C: .\n");
meillo@0 441 }
meillo@0 442
meillo@10 443 void
meillo@10 444 smtp_out_mark_rcpts(smtp_base * psb, GList * rcpt_list)
meillo@0 445 {
meillo@10 446 GList *rcpt_node;
meillo@10 447 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 448 address *rcpt = (address *) (rcpt_node->data);
meillo@0 449
meillo@10 450 addr_unmark_delivered(rcpt);
meillo@0 451
meillo@10 452 if ((psb->error == smtp_trylater) || (psb->error == smtp_timeout) || (psb->error == smtp_eof)) {
meillo@10 453 addr_mark_defered(rcpt);
meillo@10 454 } else {
meillo@10 455 addr_mark_failed(rcpt);
meillo@10 456 }
meillo@10 457 }
meillo@0 458 }
meillo@0 459
meillo@10 460 void
meillo@10 461 smtp_out_log_failure(smtp_base * psb, message * msg)
meillo@0 462 {
meillo@10 463 gchar *err_str;
meillo@0 464
meillo@10 465 if (psb->error == smtp_timeout)
meillo@10 466 err_str = g_strdup("connection timed out.");
meillo@10 467 else if (psb->error == smtp_eof)
meillo@10 468 err_str = g_strdup("connection terminated prematurely.");
meillo@10 469 else if (psb->error == smtp_syntax)
meillo@10 470 err_str = g_strdup_printf("got unexpected response: %s", psb->buffer);
meillo@10 471 else if (psb->error == smtp_cancel)
meillo@10 472 err_str = g_strdup("delivery was canceled.\n");
meillo@10 473 else
meillo@10 474 /* error message should still be in the buffer */
meillo@10 475 err_str = g_strdup_printf("failed: %s\n", psb->buffer);
meillo@0 476
meillo@10 477 if (msg == NULL)
meillo@10 478 logwrite(LOG_NOTICE, "host=%s %s\n", psb->remote_host, err_str);
meillo@10 479 else
meillo@10 480 logwrite(LOG_NOTICE, "%s == host=%s %s\n", msg->uid, psb->remote_host, err_str);
meillo@0 481
meillo@10 482 g_free(err_str);
meillo@0 483 }
meillo@0 484
meillo@10 485 smtp_base*
meillo@10 486 smtp_out_open(gchar * host, gint port, GList * resolve_list)
meillo@0 487 {
meillo@10 488 smtp_base *psb;
meillo@10 489 gint sock;
meillo@10 490 mxip_addr *addr;
meillo@0 491
meillo@10 492 DEBUG(5) debugf("smtp_out_open entered, host = %s\n", host);
meillo@0 493
meillo@10 494 if ((addr = connect_resolvelist(&sock, host, port, resolve_list))) {
meillo@10 495 /* create structure to hold status data: */
meillo@10 496 psb = create_smtpbase(sock);
meillo@10 497 psb->remote_host = addr->name;
meillo@0 498
meillo@10 499 DEBUG(5) {
meillo@10 500 struct sockaddr_in name;
meillo@10 501 int len = sizeof(struct sockaddr);
meillo@10 502 getsockname(sock, (struct sockaddr *) (&name), &len);
meillo@10 503 debugf("socket: name.sin_addr = %s\n", inet_ntoa(name.sin_addr));
meillo@10 504 }
meillo@10 505 return psb;
meillo@10 506 } else {
meillo@10 507 DEBUG(5) debugf("connect_resolvelist failed: %s %s\n", strerror(errno), hstrerror(h_errno));
meillo@10 508 }
meillo@0 509
meillo@10 510 return NULL;
meillo@0 511 }
meillo@0 512
meillo@10 513 smtp_base*
meillo@10 514 smtp_out_open_child(gchar * cmd)
meillo@0 515 {
meillo@10 516 smtp_base *psb;
meillo@10 517 gint sock;
meillo@0 518
meillo@10 519 DEBUG(5) debugf("smtp_out_open_child entered, cmd = %s\n", cmd);
meillo@0 520
meillo@10 521 sock = child(cmd);
meillo@0 522
meillo@10 523 if (sock > 0) {
meillo@10 524 psb = create_smtpbase(sock);
meillo@10 525 psb->remote_host = NULL;
meillo@0 526
meillo@10 527 return psb;
meillo@10 528 }
meillo@0 529
meillo@10 530 return NULL;
meillo@0 531 }
meillo@0 532
meillo@10 533 gboolean
meillo@10 534 smtp_out_rset(smtp_base * psb)
meillo@0 535 {
meillo@10 536 gboolean ok;
meillo@0 537
meillo@10 538 fprintf(psb->out, "RSET\r\n");
meillo@10 539 fflush(psb->out);
meillo@177 540 DEBUG(4) debugf("C: RSET\n");
meillo@0 541
meillo@10 542 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 543 if (check_response(psb, FALSE))
meillo@10 544 return TRUE;
meillo@0 545
meillo@10 546 smtp_out_log_failure(psb, NULL);
meillo@10 547
meillo@10 548 return FALSE;
meillo@0 549 }
meillo@0 550
meillo@0 551 #ifdef ENABLE_AUTH
meillo@0 552
meillo@10 553 static gboolean
meillo@10 554 smtp_out_auth_cram_md5(smtp_base * psb)
meillo@0 555 {
meillo@10 556 gboolean ok = FALSE;
meillo@0 557
meillo@177 558 fprintf(psb->out, "C: AUTH CRAM-MD5\r\n");
meillo@10 559 fflush(psb->out);
meillo@10 560 DEBUG(4) debugf("AUTH CRAM-MD5\n");
meillo@10 561 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 562 if ((ok = check_response(psb, TRUE))) {
meillo@10 563 gchar *chall64 = get_response_arg(&(psb->buffer[4]));
meillo@10 564 gint chall_size;
meillo@10 565 gchar *chall = base64_decode(chall64, &chall_size);
meillo@10 566 guchar digest[16], *reply64, *reply;
meillo@10 567 gchar digest_string[33];
meillo@10 568 gint i;
meillo@0 569 #ifdef USE_LIB_CRYPTO
meillo@10 570 unsigned int digest_len;
meillo@0 571 #endif
meillo@10 572
meillo@114 573 DEBUG(5) debugf("smtp_out_auth_cram_md5():\n");
meillo@114 574 DEBUG(5) debugf(" encoded challenge = %s\n", chall64);
meillo@114 575 DEBUG(5) debugf(" decoded challenge = %s, size = %d\n", chall, chall_size);
meillo@114 576 DEBUG(5) debugf(" secret = %s\n", psb->auth_secret);
meillo@10 577
meillo@0 578 #ifdef USE_LIB_CRYPTO
meillo@10 579 HMAC(EVP_md5(), psb->auth_secret, strlen(psb->auth_secret), chall, chall_size, digest, &digest_len);
meillo@0 580 #else
meillo@10 581 hmac_md5(chall, chall_size, psb->auth_secret, strlen(psb->auth_secret), digest);
meillo@0 582 #endif
meillo@10 583
meillo@10 584 for (i = 0; i < 16; i++)
meillo@10 585 sprintf(&(digest_string[i + i]), "%02x", (unsigned int) (digest[i]));
meillo@15 586 digest_string[32] = '\0';
meillo@10 587
meillo@114 588 DEBUG(5) debugf(" digest = %s\n", digest_string);
meillo@10 589
meillo@10 590 reply = g_strdup_printf("%s %s", psb->auth_login, digest_string);
meillo@114 591 DEBUG(5) debugf(" unencoded reply = %s\n", reply);
meillo@10 592
meillo@10 593 reply64 = base64_encode(reply, strlen(reply));
meillo@114 594 DEBUG(5) debugf(" encoded reply = %s\n", reply64);
meillo@10 595
meillo@10 596 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 597 fflush(psb->out);
meillo@177 598 DEBUG(6) debugf(" reply64 = %s\n", reply64);
meillo@177 599 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 600
meillo@10 601 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 602 ok = check_response(psb, FALSE);
meillo@10 603
meillo@10 604 g_free(reply64);
meillo@10 605 g_free(reply);
meillo@10 606 g_free(chall);
meillo@10 607 g_free(chall64);
meillo@10 608 }
meillo@10 609 }
meillo@10 610 return ok;
meillo@0 611 }
meillo@0 612
meillo@10 613 static gboolean
meillo@10 614 smtp_out_auth_login(smtp_base * psb)
meillo@0 615 {
meillo@10 616 gboolean ok = FALSE;
meillo@10 617 fprintf(psb->out, "AUTH LOGIN\r\n");
meillo@10 618 fflush(psb->out);
meillo@177 619 DEBUG(4) debugf("C: AUTH LOGIN\r\n");
meillo@10 620 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 621 if ((ok = check_response(psb, TRUE))) {
meillo@10 622 gchar *resp64;
meillo@10 623 guchar *resp;
meillo@10 624 gint resp_size;
meillo@10 625 gchar *reply64;
meillo@10 626
meillo@114 627 DEBUG(5) debugf("smtp_out_auth_login():\n");
meillo@10 628 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 629 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 630 resp = base64_decode(resp64, &resp_size);
meillo@10 631 g_free(resp64);
meillo@114 632 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 633 g_free(resp);
meillo@10 634 reply64 = base64_encode(psb->auth_login, strlen(psb->auth_login));
meillo@10 635 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 636 fflush(psb->out);
meillo@177 637 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 638 g_free(reply64);
meillo@10 639 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 640 if ((ok = check_response(psb, TRUE))) {
meillo@10 641 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 642 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 643 resp = base64_decode(resp64, &resp_size);
meillo@10 644 g_free(resp64);
meillo@114 645 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 646 g_free(resp);
meillo@10 647 reply64 = base64_encode(psb->auth_secret, strlen(psb->auth_secret));
meillo@10 648 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 649 fflush(psb->out);
meillo@177 650 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 651 g_free(reply64);
meillo@10 652 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 653 ok = check_response(psb, FALSE);
meillo@10 654 }
meillo@10 655 }
meillo@10 656 }
meillo@0 657 }
meillo@10 658 return ok;
meillo@0 659 }
meillo@0 660
meillo@10 661 gboolean
meillo@10 662 smtp_out_auth(smtp_base * psb)
meillo@0 663 {
meillo@10 664 gboolean ok = FALSE;
meillo@10 665 gint i = 0;
meillo@10 666 while (psb->auth_names[i]) {
meillo@10 667 if (strcasecmp(psb->auth_names[i], psb->auth_name) == 0)
meillo@10 668 break;
meillo@10 669 i++;
meillo@10 670 }
meillo@10 671 if (psb->auth_names[i]) {
meillo@10 672 if (strcasecmp(psb->auth_name, "cram-md5") == 0) {
meillo@10 673 smtp_out_auth_cram_md5(psb);
meillo@10 674 } else if (strcasecmp(psb->auth_name, "login") == 0) {
meillo@10 675 smtp_out_auth_login(psb);
meillo@10 676 } else {
meillo@10 677 logwrite(LOG_ERR, "auth method %s not supported\n", psb->auth_name);
meillo@10 678 }
meillo@10 679 } else {
meillo@10 680 logwrite(LOG_ERR, "no auth method %s found.\n", psb->auth_name);
meillo@10 681 }
meillo@10 682 return ok;
meillo@0 683 }
meillo@0 684
meillo@0 685 #endif
meillo@0 686
meillo@10 687 gboolean
meillo@222 688 smtp_out_init(smtp_base * psb, gboolean instant_helo)
meillo@0 689 {
meillo@10 690 gboolean ok;
meillo@0 691
meillo@222 692 logwrite(LOG_INFO, "smtp_out_init(): instant_helo:%d\n", instant_helo);
meillo@10 693
meillo@222 694 if (instant_helo) {
meillo@222 695 /* we say hello right away, hence we don't know if
meillo@222 696 ESMTP is supported; we just assume it */
meillo@222 697 psb->use_esmtp = 1;
meillo@222 698 } else {
meillo@222 699 if ((ok = read_response(psb, SMTP_INITIAL_TIMEOUT))) {
meillo@222 700 ok = check_init_response(psb);
meillo@222 701 }
meillo@222 702 if (!ok) {
meillo@222 703 smtp_out_log_failure(psb, NULL);
meillo@222 704 return ok;
meillo@222 705 }
meillo@222 706 }
meillo@222 707
meillo@222 708 if ((ok = smtp_helo(psb, psb->helo_name))) {
meillo@0 709 #ifdef ENABLE_AUTH
meillo@222 710 if (psb->auth_name && psb->use_auth) {
meillo@222 711 /* we completely disregard the response of server here. If
meillo@222 712 authentication fails, the server will complain later
meillo@222 713 anyway. I know, this is not polite... */
meillo@222 714 smtp_out_auth(psb);
meillo@222 715 }
meillo@10 716 #endif
meillo@0 717 }
meillo@10 718 if (!ok)
meillo@10 719 smtp_out_log_failure(psb, NULL);
meillo@10 720 return ok;
meillo@0 721 }
meillo@0 722
meillo@10 723 gint
meillo@10 724 smtp_out_msg(smtp_base * psb, message * msg, address * return_path, GList * rcpt_list, GList * hdr_list)
meillo@0 725 {
meillo@10 726 gint i, size;
meillo@10 727 gboolean ok = TRUE;
meillo@10 728 int rcpt_cnt;
meillo@10 729 int rcpt_accept = 0;
meillo@0 730
meillo@10 731 DEBUG(5) debugf("smtp_out_msg entered\n");
meillo@0 732
meillo@10 733 /* defaults: */
meillo@10 734 if (return_path == NULL)
meillo@10 735 return_path = msg->return_path;
meillo@10 736 if (hdr_list == NULL)
meillo@10 737 hdr_list = msg->hdr_list;
meillo@10 738 if (rcpt_list == NULL)
meillo@10 739 rcpt_list = msg->rcpt_list;
meillo@10 740 rcpt_cnt = g_list_length(rcpt_list);
meillo@0 741
meillo@10 742 size = msg_calc_size(msg, TRUE);
meillo@0 743
meillo@10 744 /* respect maximum size given by server: */
meillo@10 745 if ((psb->max_size > 0) && (size > psb->max_size)) {
meillo@114 746 logwrite(LOG_WARNING, "%s == host=%s message size (%d) > "
meillo@114 747 "fixed maximum message size of server (%d)",
meillo@10 748 msg->uid, psb->remote_host, size, psb->max_size);
meillo@10 749 psb->error = smtp_cancel;
meillo@10 750 ok = FALSE;
meillo@10 751 }
meillo@0 752
meillo@10 753 if (ok) {
meillo@119 754 /* pretend the message is a bit larger,
meillo@119 755 just in case the size calculation is buggy */
meillo@119 756 smtp_cmd_mailfrom(psb, return_path, psb->use_size ? size+SMTP_SIZE_ADD : 0);
meillo@0 757
meillo@10 758 if (!psb->use_pipelining) {
meillo@10 759 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 760 ok = check_response(psb, FALSE);
meillo@10 761 }
meillo@10 762 }
meillo@10 763 if (ok) {
meillo@10 764 GList *rcpt_node;
meillo@10 765 rcpt_accept = 0;
meillo@0 766
meillo@10 767 for (rcpt_node = g_list_first(rcpt_list); rcpt_node != NULL; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 768 address *rcpt = (address *) (rcpt_node->data);
meillo@10 769 smtp_cmd_rcptto(psb, rcpt);
meillo@10 770 if (!psb->use_pipelining) {
meillo@10 771 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 772 if (check_response(psb, FALSE)) {
meillo@10 773 rcpt_accept++;
meillo@10 774 addr_mark_delivered(rcpt);
meillo@10 775 } else {
meillo@10 776 /* if server returned an error for one recp. we
meillo@10 777 may still try the others. But if it is a timeout, eof
meillo@10 778 or unexpected response, it is more serious and we should
meillo@10 779 give up. */
meillo@10 780 if ((psb->error != smtp_trylater) && (psb->error != smtp_fail)) {
meillo@10 781 ok = FALSE;
meillo@10 782 break;
meillo@10 783 } else {
meillo@114 784 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n",
meillo@15 785 msg->uid, addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 786 if (psb->error == smtp_trylater) {
meillo@10 787 addr_mark_defered(rcpt);
meillo@10 788 } else {
meillo@10 789 addr_mark_failed(rcpt);
meillo@10 790 }
meillo@10 791 }
meillo@10 792 } else
meillo@10 793 break;
meillo@10 794 }
meillo@10 795 }
meillo@0 796
meillo@10 797 /* There is no point in going on if no recp.s were accpted.
meillo@10 798 But we can check that at this point only if not pipelining: */
meillo@10 799 ok = (ok && (psb->use_pipelining || (rcpt_accept > 0)));
meillo@10 800 if (ok) {
meillo@0 801
meillo@10 802 fprintf(psb->out, "DATA\r\n");
meillo@10 803 fflush(psb->out);
meillo@0 804
meillo@177 805 DEBUG(4) debugf("C: DATA\r\n");
meillo@10 806
meillo@10 807 if (psb->use_pipelining) {
meillo@10 808 /* the first pl'ed command was MAIL FROM
meillo@10 809 the last was DATA, whose response can be handled by the 'normal' code
meillo@10 810 all in between were RCPT TO:
meillo@10 811 */
meillo@10 812 /* response to MAIL FROM: */
meillo@10 813 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 814 if ((ok = check_response(psb, FALSE))) {
meillo@10 815
meillo@10 816 /* response(s) to RCPT TO:
meillo@10 817 this is very similar to the sequence above for no pipeline
meillo@10 818 */
meillo@10 819 for (i = 0; i < rcpt_cnt; i++) {
meillo@10 820 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 821 address *rcpt = g_list_nth_data(rcpt_list, i);
meillo@10 822 if (check_response(psb, FALSE)) {
meillo@10 823 rcpt_accept++;
meillo@10 824 addr_mark_delivered(rcpt);
meillo@10 825 } else {
meillo@10 826 /* if server returned an error 4xx or 5xx for one recp. we
meillo@10 827 may still try the others. But if it is a timeout, eof
meillo@10 828 or unexpected response, it is more serious and we
meillo@10 829 should give up. */
meillo@10 830 if ((psb->error != smtp_trylater) &&
meillo@10 831 (psb->error != smtp_fail)) {
meillo@10 832 ok = FALSE;
meillo@10 833 break;
meillo@10 834 } else {
meillo@114 835 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n", msg->uid,
meillo@10 836 addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 837 if (psb->error == smtp_trylater) {
meillo@10 838 addr_mark_defered(rcpt);
meillo@10 839 } else {
meillo@10 840 addr_mark_failed(rcpt);
meillo@10 841 }
meillo@10 842 }
meillo@10 843 }
meillo@10 844 } else {
meillo@10 845 DEBUG(5) debugf("check_response failed after RCPT TO\n");
meillo@10 846 break;
meillo@10 847 }
meillo@10 848 }
meillo@10 849 if (rcpt_accept == 0)
meillo@10 850 ok = FALSE;
meillo@10 851 } else {
meillo@10 852 DEBUG(5) debugf("check_response failed after MAIL FROM\n");
meillo@10 853 }
meillo@10 854 } else {
meillo@10 855 DEBUG(5)
meillo@10 856 debugf("read_response failed after MAIL FROM\n");
meillo@10 857 }
meillo@10 858 }
meillo@10 859
meillo@10 860 /* if(psb->use_pipelining) */
meillo@10 861 /* response to the DATA cmd */
meillo@10 862 if (ok) {
meillo@10 863 if (read_response(psb, SMTP_DATA_TIMEOUT)) {
meillo@10 864 if (check_response(psb, TRUE)) {
meillo@10 865 send_header(psb, hdr_list);
meillo@10 866 send_data(psb, msg);
meillo@10 867
meillo@10 868 if (read_response(psb, SMTP_FINAL_TIMEOUT))
meillo@10 869 ok = check_response(psb, FALSE);
meillo@10 870 }
meillo@10 871 }
meillo@10 872 }
meillo@0 873 }
meillo@10 874 }
meillo@10 875
meillo@10 876 DEBUG(5) {
meillo@114 877 debugf("smtp_out_msg():\n");
meillo@114 878 debugf(" psb->error = %d\n", psb->error);
meillo@114 879 debugf(" ok = %d\n", ok);
meillo@114 880 debugf(" rcpt_accept = %d\n", rcpt_accept);
meillo@10 881 }
meillo@10 882
meillo@10 883 if (psb->error == smtp_ok) {
meillo@10 884 GList *rcpt_node;
meillo@10 885 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 886 address *rcpt = (address *) (rcpt_node->data);
meillo@10 887 if (addr_is_delivered(rcpt))
meillo@10 888 logwrite(LOG_NOTICE, "%s => %s host=%s with %s\n", msg->uid, addr_string(rcpt),
meillo@10 889 psb->remote_host, psb->use_esmtp ? "esmtp" : "smtp");
meillo@0 890 }
meillo@10 891 } else {
meillo@10 892 /* if something went wrong,
meillo@10 893 we have to unmark the rcpts prematurely marked as delivered
meillo@10 894 and mark the status */
meillo@10 895 smtp_out_mark_rcpts(psb, rcpt_list);
meillo@10 896
meillo@10 897 /* log the failure: */
meillo@10 898 smtp_out_log_failure(psb, msg);
meillo@0 899 }
meillo@10 900 return rcpt_accept;
meillo@0 901 }
meillo@0 902
meillo@10 903 gboolean
meillo@10 904 smtp_out_quit(smtp_base * psb)
meillo@0 905 {
meillo@10 906 fprintf(psb->out, "QUIT\r\n");
meillo@10 907 fflush(psb->out);
meillo@0 908
meillo@177 909 DEBUG(4) debugf("C: QUIT\n");
meillo@0 910
meillo@10 911 signal(SIGALRM, SIG_DFL);
meillo@10 912
meillo@10 913 return TRUE;
meillo@0 914 }
meillo@10 915
meillo@10 916 gint
meillo@10 917 smtp_deliver(gchar * host, gint port, GList * resolve_list, message * msg, address * return_path, GList * rcpt_list)
meillo@0 918 {
meillo@10 919 smtp_base *psb;
meillo@10 920 smtp_error err;
meillo@0 921
meillo@10 922 DEBUG(5) debugf("smtp_deliver entered\n");
meillo@0 923
meillo@10 924 if (return_path == NULL)
meillo@10 925 return_path = msg->return_path;
meillo@0 926
meillo@10 927 if ((psb = smtp_out_open(host, port, resolve_list))) {
meillo@10 928 set_heloname(psb, return_path->domain, TRUE);
meillo@10 929 /* initiate connection, send message and quit: */
meillo@222 930 if (smtp_out_init(psb, FALSE)) {
meillo@10 931 smtp_out_msg(psb, msg, return_path, rcpt_list, NULL);
meillo@10 932 if (psb->error == smtp_ok || (psb->error == smtp_fail) || (psb->error == smtp_trylater)
meillo@10 933 || (psb->error == smtp_syntax) || (psb->error == smtp_cancel))
meillo@10 934 smtp_out_quit(psb);
meillo@10 935 }
meillo@10 936
meillo@10 937 err = psb->error;
meillo@10 938 destroy_smtpbase(psb);
meillo@10 939
meillo@10 940 return err;
meillo@10 941 }
meillo@10 942 return -1;
meillo@0 943 }