masqmail

annotate src/smtp_out.c @ 198:c5e964e6ddbe

find changesets by author, revision, files, or words in the commit message
the goal is to have less config options especially less compile-time config options this is where oku and I differ in opinion
author meillo@marmaro.de
date Fri, 16 Jul 2010 10:08:06 +0200
parents a39c8ee61185
children 10da50168dab
rev   line source
meillo@0 1 /* smtp_out.c, Copyright (C) 1999-2001 Oliver Kurth,
meillo@0 2 *
meillo@0 3 * This program is free software; you can redistribute it and/or modify
meillo@0 4 * it under the terms of the GNU General Public License as published by
meillo@0 5 * the Free Software Foundation; either version 2 of the License, or
meillo@0 6 * (at your option) any later version.
meillo@10 7 *
meillo@0 8 * This program is distributed in the hope that it will be useful,
meillo@0 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 11 * GNU General Public License for more details.
meillo@0 12 *
meillo@0 13 * You should have received a copy of the GNU General Public License
meillo@0 14 * along with this program; if not, write to the Free Software
meillo@0 15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
meillo@0 16 */
meillo@0 17
meillo@0 18 /*
meillo@0 19 send bugs to: kurth@innominate.de
meillo@0 20 */
meillo@0 21
meillo@0 22 /*
meillo@0 23 I always forget these rfc numbers:
meillo@0 24 RFC 821 (SMTP)
meillo@0 25 RFC 1869 (ESMTP)
meillo@0 26 RFC 1870 (ESMTP SIZE)
meillo@0 27 RFC 2197 (ESMTP PIPELINE)
meillo@0 28 RFC 2554 (ESMTP AUTH)
meillo@0 29 */
meillo@0 30
meillo@0 31 #include "masqmail.h"
meillo@0 32 #include "smtp_out.h"
meillo@0 33 #include "readsock.h"
meillo@0 34
meillo@0 35 #ifdef ENABLE_AUTH
meillo@0 36
meillo@0 37 #ifdef USE_LIB_CRYPTO
meillo@0 38 #include <openssl/hmac.h>
meillo@0 39 #include <openssl/md5.h>
meillo@0 40 #include <openssl/evp.h>
meillo@0 41 #else
meillo@0 42 #include "md5/global.h"
meillo@0 43 #include "md5/md5.h"
meillo@0 44 #include "md5/hmac_md5.h"
meillo@0 45 #endif
meillo@0 46
meillo@0 47 #include "base64/base64.h"
meillo@0 48 #endif
meillo@0 49
meillo@10 50 void
meillo@10 51 destroy_smtpbase(smtp_base * psb)
meillo@0 52 {
meillo@10 53 fclose(psb->in);
meillo@10 54 fclose(psb->out);
meillo@0 55
meillo@10 56 close(psb->sock);
meillo@0 57
meillo@10 58 if (psb->helo_name)
meillo@10 59 g_free(psb->helo_name);
meillo@10 60 if (psb->buffer)
meillo@10 61 g_free(psb->buffer);
meillo@10 62 if (psb->auth_names)
meillo@10 63 g_strfreev(psb->auth_names);
meillo@0 64
meillo@10 65 if (psb->auth_name)
meillo@10 66 g_free(psb->auth_name);
meillo@10 67 if (psb->auth_login)
meillo@10 68 g_free(psb->auth_login);
meillo@10 69 if (psb->auth_secret)
meillo@10 70 g_free(psb->auth_secret);
meillo@0 71 }
meillo@0 72
meillo@10 73 gchar*
meillo@10 74 set_heloname(smtp_base * psb, gchar * default_name, gboolean do_correct)
meillo@0 75 {
meillo@10 76 struct sockaddr_in sname;
meillo@10 77 int len = sizeof(struct sockaddr_in);
meillo@10 78 struct hostent *host_entry;
meillo@0 79
meillo@10 80 if (do_correct) {
meillo@10 81 getsockname(psb->sock, (struct sockaddr *) (&sname), &len);
meillo@10 82 DEBUG(5) debugf("socket: name.sin_addr = %s\n", inet_ntoa(sname.sin_addr));
meillo@10 83 host_entry = gethostbyaddr((const char *) &(sname.sin_addr), sizeof(sname.sin_addr), AF_INET);
meillo@10 84 if (host_entry) {
meillo@10 85 psb->helo_name = g_strdup(host_entry->h_name);
meillo@10 86 } else {
meillo@10 87 /* we failed to look up our own name. Instead of giving our local hostname,
meillo@10 88 we may give our IP number to show the server that we are at least
meillo@10 89 willing to be honest. For the really picky ones. */
meillo@10 90 DEBUG(5) debugf("failed to look up own host name.\n");
meillo@10 91 psb->helo_name = g_strdup_printf("[%s]", inet_ntoa(sname.sin_addr));
meillo@10 92 }
meillo@10 93 DEBUG(5) debugf("helo_name = %s\n", psb->helo_name);
meillo@10 94 }
meillo@10 95 if (psb->helo_name == NULL) {
meillo@10 96 psb->helo_name = g_strdup(default_name);
meillo@10 97 }
meillo@10 98 return psb->helo_name;
meillo@10 99 }
meillo@0 100
meillo@0 101 #ifdef ENABLE_AUTH
meillo@0 102
meillo@10 103 gboolean
meillo@10 104 set_auth(smtp_base * psb, gchar * name, gchar * login, gchar * secret)
meillo@0 105 {
meillo@10 106 if ((strcasecmp(name, "CRAM-MD5") == 0) || (strcasecmp(name, "LOGIN") == 0)) {
meillo@10 107 psb->auth_name = g_strdup(name);
meillo@10 108 psb->auth_login = g_strdup(login);
meillo@10 109 psb->auth_secret = g_strdup(secret);
meillo@10 110
meillo@10 111 return TRUE;
meillo@10 112 }
meillo@10 113 return FALSE;
meillo@0 114 }
meillo@0 115
meillo@0 116 #endif
meillo@0 117
meillo@10 118 static smtp_base*
meillo@10 119 create_smtpbase(gint sock)
meillo@0 120 {
meillo@10 121 gint dup_sock;
meillo@0 122
meillo@10 123 smtp_base *psb = (smtp_base *) g_malloc(sizeof(smtp_base));
meillo@0 124
meillo@10 125 psb->sock = sock;
meillo@0 126
meillo@10 127 psb->use_esmtp = FALSE;
meillo@10 128 psb->use_size = FALSE;
meillo@10 129 psb->use_pipelining = FALSE;
meillo@10 130 psb->use_auth = FALSE;
meillo@0 131
meillo@10 132 psb->max_size = 0;
meillo@10 133 psb->auth_names = NULL;
meillo@0 134
meillo@10 135 psb->buffer = (gchar *) g_malloc(SMTP_BUF_LEN);
meillo@0 136
meillo@10 137 dup_sock = dup(sock);
meillo@10 138 psb->out = fdopen(sock, "w");
meillo@10 139 psb->in = fdopen(dup_sock, "r");
meillo@0 140
meillo@10 141 psb->error = smtp_ok;
meillo@0 142
meillo@10 143 psb->helo_name = NULL;
meillo@0 144
meillo@10 145 psb->auth_name = psb->auth_login = psb->auth_secret = NULL;
meillo@10 146
meillo@10 147 return psb;
meillo@0 148 }
meillo@0 149
meillo@10 150 static gboolean
meillo@10 151 read_response(smtp_base * psb, int timeout)
meillo@0 152 {
meillo@10 153 gint buf_pos = 0;
meillo@10 154 gchar code[5];
meillo@10 155 gint i, len;
meillo@0 156
meillo@10 157 do {
meillo@10 158 len = read_sockline(psb->in, &(psb->buffer[buf_pos]), SMTP_BUF_LEN - buf_pos, timeout, READSOCKL_CHUG);
meillo@10 159 if (len == -3) {
meillo@10 160 psb->error = smtp_timeout;
meillo@10 161 return FALSE;
meillo@10 162 } else if (len == -2) {
meillo@10 163 psb->error = smtp_syntax;
meillo@10 164 return FALSE;
meillo@10 165 } else if (len == -1) {
meillo@10 166 psb->error = smtp_eof;
meillo@10 167 return FALSE;
meillo@10 168 }
meillo@10 169 for (i = 0; i < 4; i++)
meillo@10 170 code[i] = psb->buffer[buf_pos + i];
meillo@15 171 code[i] = '\0';
meillo@10 172 psb->last_code = atoi(code);
meillo@0 173
meillo@10 174 buf_pos += len;
meillo@0 175
meillo@10 176 } while (code[3] == '-');
meillo@177 177 if (psb->buffer) {
meillo@177 178 DEBUG(4) debugf("S: %s\n", psb->buffer);
meillo@177 179 }
meillo@0 180
meillo@10 181 return TRUE;
meillo@0 182 }
meillo@0 183
meillo@10 184 static gboolean
meillo@10 185 check_response(smtp_base * psb, gboolean after_data)
meillo@0 186 {
meillo@10 187 char c = psb->buffer[0];
meillo@0 188
meillo@10 189 if (((c == '2') && !after_data) || ((c == '3') && after_data)) {
meillo@10 190 psb->error = smtp_ok;
meillo@176 191 DEBUG(6) debugf("response OK:'%s' after_data = %d\n", psb->buffer, (int) after_data);
meillo@10 192 return TRUE;
meillo@10 193 } else {
meillo@10 194 if (c == '4')
meillo@10 195 psb->error = smtp_trylater;
meillo@10 196 else if (c == '5')
meillo@10 197 psb->error = smtp_fail;
meillo@10 198 else
meillo@10 199 psb->error = smtp_syntax;
meillo@176 200 DEBUG(6) debugf("response failure:'%s' after_data = %d\n", psb->buffer, (int) after_data);
meillo@10 201 return FALSE;
meillo@10 202 }
meillo@0 203 }
meillo@0 204
meillo@10 205 static gboolean
meillo@10 206 check_init_response(smtp_base * psb)
meillo@0 207 {
meillo@10 208 if (check_response(psb, FALSE)) {
meillo@10 209 psb->use_esmtp = (strstr(psb->buffer, "ESMTP") != NULL);
meillo@0 210
meillo@10 211 DEBUG(4) debugf(psb->use_esmtp ? "uses esmtp\n" : "no esmtp\n");
meillo@0 212
meillo@10 213 return TRUE;
meillo@10 214 }
meillo@10 215 return FALSE;
meillo@0 216 }
meillo@0 217
meillo@10 218 static gchar*
meillo@10 219 get_response_arg(gchar * response)
meillo@0 220 {
meillo@10 221 gchar buf[SMTP_BUF_LEN];
meillo@10 222 gchar *p = response, *q = buf;
meillo@0 223
meillo@10 224 while (*p && (*p != '\n') && isspace(*p))
meillo@10 225 p++;
meillo@10 226 if (*p && (*p != '\n')) {
meillo@10 227 while (*p && (*p != '\n') && (*p != '\r') && (q < buf + SMTP_BUF_LEN - 1))
meillo@10 228 *(q++) = *(p++);
meillo@15 229 *q = '\0';
meillo@10 230 return g_strdup(buf);
meillo@10 231 }
meillo@10 232 return NULL;
meillo@0 233 }
meillo@0 234
meillo@10 235 static gboolean
meillo@10 236 check_helo_response(smtp_base * psb)
meillo@0 237 {
meillo@10 238 gchar *ptr = psb->buffer;
meillo@0 239
meillo@10 240 if (!check_response(psb, FALSE))
meillo@10 241 return FALSE;
meillo@0 242
meillo@10 243 while (*ptr) {
meillo@10 244 if (strncasecmp(&(ptr[4]), "SIZE", 4) == 0) {
meillo@10 245 gchar *arg;
meillo@10 246 psb->use_size = TRUE;
meillo@10 247 arg = get_response_arg(&(ptr[8]));
meillo@10 248 if (arg) {
meillo@10 249 psb->max_size = atoi(arg);
meillo@10 250 g_free(arg);
meillo@10 251 }
meillo@10 252 }
meillo@0 253
meillo@10 254 if (strncasecmp(&(ptr[4]), "PIPELINING", 10) == 0)
meillo@10 255 psb->use_pipelining = TRUE;
meillo@0 256
meillo@10 257 if (strncasecmp(&(ptr[4]), "AUTH", 4) == 0) {
meillo@10 258 if ((ptr[8] == ' ') || (ptr[8] == '=') || (ptr[8] == '\t')) { /* not sure about '\t' */
meillo@10 259 gchar *arg;
meillo@10 260 psb->use_auth = TRUE;
meillo@10 261 arg = get_response_arg(&(ptr[9])); /* after several years I finally learnt to count */
meillo@10 262 if (arg) {
meillo@10 263 psb->auth_names = g_strsplit(arg, " ", 0);
meillo@10 264 g_free(arg);
meillo@10 265
meillo@10 266 DEBUG(4) {
meillo@10 267 gint i = 0;
meillo@114 268 debugf("in check_helo_response()\n");
meillo@10 269 while (psb->auth_names[i]) {
meillo@114 270 debugf(" offered AUTH %s\n", psb->auth_names[i]);
meillo@10 271 i++;
meillo@10 272 }
meillo@10 273 }
meillo@10 274 }
meillo@10 275 }
meillo@10 276 }
meillo@10 277
meillo@10 278 while (*ptr != '\n')
meillo@10 279 ptr++;
meillo@10 280 ptr++;
meillo@0 281 }
meillo@0 282
meillo@10 283 DEBUG(4) {
meillo@114 284 debugf(" %s\n", psb->use_size ? "uses SIZE" : "no size");
meillo@114 285 debugf(" %s\n", psb->use_pipelining ? "uses PIPELINING" : "no pipelining");
meillo@114 286 debugf(" %s\n", psb->use_auth ? "uses AUTH" : "no auth");
meillo@10 287 }
meillo@0 288
meillo@10 289 return TRUE;
meillo@0 290 }
meillo@0 291
meillo@10 292 static gboolean
meillo@10 293 smtp_helo(smtp_base * psb, gchar * helo)
meillo@0 294 {
meillo@10 295 while (TRUE) {
meillo@10 296 if (psb->use_esmtp) {
meillo@10 297 fprintf(psb->out, "EHLO %s\r\n", helo);
meillo@10 298 fflush(psb->out);
meillo@0 299
meillo@177 300 DEBUG(4) debugf("C: EHLO %s\r\n", helo);
meillo@0 301
meillo@10 302 } else {
meillo@10 303 fprintf(psb->out, "HELO %s\r\n", helo);
meillo@10 304 fflush(psb->out);
meillo@0 305
meillo@177 306 DEBUG(4) debugf("C: HELO %s\r\n", helo);
meillo@0 307
meillo@10 308 }
meillo@0 309
meillo@10 310 if (!read_response(psb, SMTP_CMD_TIMEOUT))
meillo@10 311 return FALSE;
meillo@10 312
meillo@10 313 if (check_helo_response(psb))
meillo@10 314 return TRUE;
meillo@10 315 else {
meillo@10 316 if (psb->error == smtp_fail) {
meillo@10 317 if (psb->use_esmtp) {
meillo@10 318 /* our guess that server understands EHLO was wrong, try again with HELO */
meillo@10 319 psb->use_esmtp = FALSE;
meillo@10 320 } else {
meillo@10 321 /* what sort of server ist THAT ?! give up... */
meillo@10 322 return FALSE;
meillo@10 323 }
meillo@10 324 } else
meillo@10 325 return FALSE;
meillo@10 326 }
meillo@0 327 }
meillo@0 328 }
meillo@0 329
meillo@10 330 static void
meillo@10 331 smtp_cmd_mailfrom(smtp_base * psb, address * return_path, guint size)
meillo@0 332 {
meillo@10 333 if (psb->use_size) {
meillo@10 334 fprintf(psb->out, "MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@10 335 fflush(psb->out);
meillo@0 336
meillo@177 337 DEBUG(4) debugf("C: MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@0 338
meillo@10 339 } else {
meillo@10 340 fprintf(psb->out, "MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 341 fflush(psb->out);
meillo@0 342
meillo@177 343 DEBUG(4) debugf("C: MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 344 }
meillo@0 345 }
meillo@0 346
meillo@10 347 static void
meillo@10 348 smtp_cmd_rcptto(smtp_base * psb, address * rcpt)
meillo@0 349 {
meillo@10 350 fprintf(psb->out, "RCPT TO:%s\r\n", addr_string(rcpt));
meillo@10 351 fflush(psb->out);
meillo@177 352 DEBUG(4) debugf("C: RCPT TO:%s\n", addr_string(rcpt));
meillo@0 353 }
meillo@0 354
meillo@10 355 static void
meillo@10 356 send_data_line(smtp_base * psb, gchar * data)
meillo@0 357 {
meillo@10 358 /* According to RFC 821 each line should be terminated with CRLF.
meillo@10 359 Since a dot on a line itself marks the end of data, each line
meillo@10 360 beginning with a dot is prepended with another dot.
meillo@10 361 */
meillo@10 362 gchar *ptr;
meillo@15 363 gboolean new_line = TRUE; /* previous versions assumed that each item was exactly one line.
meillo@15 364 This is no longer the case */
meillo@0 365
meillo@10 366 ptr = data;
meillo@10 367 while (*ptr) {
meillo@10 368 int c = (int) (*ptr);
meillo@119 369 if (c == '.' && new_line) {
meillo@119 370 /* dot-stuffing */
meillo@119 371 putc('.', psb->out);
meillo@119 372 }
meillo@10 373 if (c == '\n') {
meillo@119 374 /* CRLF line terminators */
meillo@10 375 putc('\r', psb->out);
meillo@10 376 putc('\n', psb->out);
meillo@10 377 new_line = TRUE;
meillo@10 378 } else {
meillo@10 379 putc(c, psb->out);
meillo@10 380 new_line = FALSE;
meillo@10 381 }
meillo@10 382 ptr++;
meillo@10 383 }
meillo@0 384 }
meillo@0 385
meillo@10 386 static void
meillo@10 387 send_header(smtp_base * psb, GList * hdr_list)
meillo@0 388 {
meillo@10 389 GList *node;
meillo@10 390 gint num_hdrs = 0;
meillo@0 391
meillo@10 392 /* header */
meillo@10 393 if (hdr_list) {
meillo@10 394 foreach(hdr_list, node) {
meillo@10 395 if (node->data) {
meillo@10 396 header *hdr = (header *) (node->data);
meillo@10 397 if (hdr->header) {
meillo@10 398 send_data_line(psb, hdr->header);
meillo@10 399 num_hdrs++;
meillo@10 400 }
meillo@10 401 }
meillo@10 402 }
meillo@0 403 }
meillo@0 404
meillo@10 405 /* empty line separating headers from data: */
meillo@10 406 putc('\r', psb->out);
meillo@10 407 putc('\n', psb->out);
meillo@0 408
meillo@10 409 DEBUG(4) debugf("sent %d headers\n", num_hdrs);
meillo@0 410 }
meillo@0 411
meillo@10 412 static void
meillo@10 413 send_data(smtp_base * psb, message * msg)
meillo@0 414 {
meillo@10 415 GList *node;
meillo@10 416 gint num_lines = 0;
meillo@0 417
meillo@10 418 /* data */
meillo@10 419 if (msg->data_list) {
meillo@10 420 for (node = g_list_first(msg->data_list); node; node = g_list_next(node)) {
meillo@10 421 if (node->data) {
meillo@10 422 send_data_line(psb, node->data);
meillo@10 423 num_lines++;
meillo@10 424 }
meillo@10 425 }
meillo@10 426 }
meillo@0 427
meillo@10 428 DEBUG(4) debugf("sent %d lines of data\n", num_lines);
meillo@0 429
meillo@10 430 fprintf(psb->out, ".\r\n");
meillo@10 431 fflush(psb->out);
meillo@177 432 DEBUG(4) debugf("C: .\n");
meillo@0 433 }
meillo@0 434
meillo@10 435 void
meillo@10 436 smtp_out_mark_rcpts(smtp_base * psb, GList * rcpt_list)
meillo@0 437 {
meillo@10 438 GList *rcpt_node;
meillo@10 439 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 440 address *rcpt = (address *) (rcpt_node->data);
meillo@0 441
meillo@10 442 addr_unmark_delivered(rcpt);
meillo@0 443
meillo@10 444 if ((psb->error == smtp_trylater) || (psb->error == smtp_timeout) || (psb->error == smtp_eof)) {
meillo@10 445 addr_mark_defered(rcpt);
meillo@10 446 } else {
meillo@10 447 addr_mark_failed(rcpt);
meillo@10 448 }
meillo@10 449 }
meillo@0 450 }
meillo@0 451
meillo@10 452 void
meillo@10 453 smtp_out_log_failure(smtp_base * psb, message * msg)
meillo@0 454 {
meillo@10 455 gchar *err_str;
meillo@0 456
meillo@10 457 if (psb->error == smtp_timeout)
meillo@10 458 err_str = g_strdup("connection timed out.");
meillo@10 459 else if (psb->error == smtp_eof)
meillo@10 460 err_str = g_strdup("connection terminated prematurely.");
meillo@10 461 else if (psb->error == smtp_syntax)
meillo@10 462 err_str = g_strdup_printf("got unexpected response: %s", psb->buffer);
meillo@10 463 else if (psb->error == smtp_cancel)
meillo@10 464 err_str = g_strdup("delivery was canceled.\n");
meillo@10 465 else
meillo@10 466 /* error message should still be in the buffer */
meillo@10 467 err_str = g_strdup_printf("failed: %s\n", psb->buffer);
meillo@0 468
meillo@10 469 if (msg == NULL)
meillo@10 470 logwrite(LOG_NOTICE, "host=%s %s\n", psb->remote_host, err_str);
meillo@10 471 else
meillo@10 472 logwrite(LOG_NOTICE, "%s == host=%s %s\n", msg->uid, psb->remote_host, err_str);
meillo@0 473
meillo@10 474 g_free(err_str);
meillo@0 475 }
meillo@0 476
meillo@10 477 smtp_base*
meillo@10 478 smtp_out_open(gchar * host, gint port, GList * resolve_list)
meillo@0 479 {
meillo@10 480 smtp_base *psb;
meillo@10 481 gint sock;
meillo@10 482 mxip_addr *addr;
meillo@0 483
meillo@10 484 DEBUG(5) debugf("smtp_out_open entered, host = %s\n", host);
meillo@0 485
meillo@10 486 if ((addr = connect_resolvelist(&sock, host, port, resolve_list))) {
meillo@10 487 /* create structure to hold status data: */
meillo@10 488 psb = create_smtpbase(sock);
meillo@10 489 psb->remote_host = addr->name;
meillo@0 490
meillo@10 491 DEBUG(5) {
meillo@10 492 struct sockaddr_in name;
meillo@10 493 int len = sizeof(struct sockaddr);
meillo@10 494 getsockname(sock, (struct sockaddr *) (&name), &len);
meillo@10 495 debugf("socket: name.sin_addr = %s\n", inet_ntoa(name.sin_addr));
meillo@10 496 }
meillo@10 497 return psb;
meillo@10 498 } else {
meillo@10 499 DEBUG(5) debugf("connect_resolvelist failed: %s %s\n", strerror(errno), hstrerror(h_errno));
meillo@10 500 }
meillo@0 501
meillo@10 502 return NULL;
meillo@0 503 }
meillo@0 504
meillo@10 505 smtp_base*
meillo@10 506 smtp_out_open_child(gchar * cmd)
meillo@0 507 {
meillo@10 508 smtp_base *psb;
meillo@10 509 gint sock;
meillo@0 510
meillo@10 511 DEBUG(5) debugf("smtp_out_open_child entered, cmd = %s\n", cmd);
meillo@0 512
meillo@10 513 sock = child(cmd);
meillo@0 514
meillo@10 515 if (sock > 0) {
meillo@10 516 psb = create_smtpbase(sock);
meillo@10 517 psb->remote_host = NULL;
meillo@0 518
meillo@10 519 return psb;
meillo@10 520 }
meillo@0 521
meillo@10 522 return NULL;
meillo@0 523 }
meillo@0 524
meillo@10 525 gboolean
meillo@10 526 smtp_out_rset(smtp_base * psb)
meillo@0 527 {
meillo@10 528 gboolean ok;
meillo@0 529
meillo@10 530 fprintf(psb->out, "RSET\r\n");
meillo@10 531 fflush(psb->out);
meillo@177 532 DEBUG(4) debugf("C: RSET\n");
meillo@0 533
meillo@10 534 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 535 if (check_response(psb, FALSE))
meillo@10 536 return TRUE;
meillo@0 537
meillo@10 538 smtp_out_log_failure(psb, NULL);
meillo@10 539
meillo@10 540 return FALSE;
meillo@0 541 }
meillo@0 542
meillo@0 543 #ifdef ENABLE_AUTH
meillo@0 544
meillo@10 545 static gboolean
meillo@10 546 smtp_out_auth_cram_md5(smtp_base * psb)
meillo@0 547 {
meillo@10 548 gboolean ok = FALSE;
meillo@0 549
meillo@177 550 fprintf(psb->out, "C: AUTH CRAM-MD5\r\n");
meillo@10 551 fflush(psb->out);
meillo@10 552 DEBUG(4) debugf("AUTH CRAM-MD5\n");
meillo@10 553 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 554 if ((ok = check_response(psb, TRUE))) {
meillo@10 555 gchar *chall64 = get_response_arg(&(psb->buffer[4]));
meillo@10 556 gint chall_size;
meillo@10 557 gchar *chall = base64_decode(chall64, &chall_size);
meillo@10 558 guchar digest[16], *reply64, *reply;
meillo@10 559 gchar digest_string[33];
meillo@10 560 gint i;
meillo@0 561 #ifdef USE_LIB_CRYPTO
meillo@10 562 unsigned int digest_len;
meillo@0 563 #endif
meillo@10 564
meillo@114 565 DEBUG(5) debugf("smtp_out_auth_cram_md5():\n");
meillo@114 566 DEBUG(5) debugf(" encoded challenge = %s\n", chall64);
meillo@114 567 DEBUG(5) debugf(" decoded challenge = %s, size = %d\n", chall, chall_size);
meillo@114 568 DEBUG(5) debugf(" secret = %s\n", psb->auth_secret);
meillo@10 569
meillo@0 570 #ifdef USE_LIB_CRYPTO
meillo@10 571 HMAC(EVP_md5(), psb->auth_secret, strlen(psb->auth_secret), chall, chall_size, digest, &digest_len);
meillo@0 572 #else
meillo@10 573 hmac_md5(chall, chall_size, psb->auth_secret, strlen(psb->auth_secret), digest);
meillo@0 574 #endif
meillo@10 575
meillo@10 576 for (i = 0; i < 16; i++)
meillo@10 577 sprintf(&(digest_string[i + i]), "%02x", (unsigned int) (digest[i]));
meillo@15 578 digest_string[32] = '\0';
meillo@10 579
meillo@114 580 DEBUG(5) debugf(" digest = %s\n", digest_string);
meillo@10 581
meillo@10 582 reply = g_strdup_printf("%s %s", psb->auth_login, digest_string);
meillo@114 583 DEBUG(5) debugf(" unencoded reply = %s\n", reply);
meillo@10 584
meillo@10 585 reply64 = base64_encode(reply, strlen(reply));
meillo@114 586 DEBUG(5) debugf(" encoded reply = %s\n", reply64);
meillo@10 587
meillo@10 588 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 589 fflush(psb->out);
meillo@177 590 DEBUG(6) debugf(" reply64 = %s\n", reply64);
meillo@177 591 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 592
meillo@10 593 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 594 ok = check_response(psb, FALSE);
meillo@10 595
meillo@10 596 g_free(reply64);
meillo@10 597 g_free(reply);
meillo@10 598 g_free(chall);
meillo@10 599 g_free(chall64);
meillo@10 600 }
meillo@10 601 }
meillo@10 602 return ok;
meillo@0 603 }
meillo@0 604
meillo@10 605 static gboolean
meillo@10 606 smtp_out_auth_login(smtp_base * psb)
meillo@0 607 {
meillo@10 608 gboolean ok = FALSE;
meillo@10 609 fprintf(psb->out, "AUTH LOGIN\r\n");
meillo@10 610 fflush(psb->out);
meillo@177 611 DEBUG(4) debugf("C: AUTH LOGIN\r\n");
meillo@10 612 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 613 if ((ok = check_response(psb, TRUE))) {
meillo@10 614 gchar *resp64;
meillo@10 615 guchar *resp;
meillo@10 616 gint resp_size;
meillo@10 617 gchar *reply64;
meillo@10 618
meillo@114 619 DEBUG(5) debugf("smtp_out_auth_login():\n");
meillo@10 620 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 621 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 622 resp = base64_decode(resp64, &resp_size);
meillo@10 623 g_free(resp64);
meillo@114 624 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 625 g_free(resp);
meillo@10 626 reply64 = base64_encode(psb->auth_login, strlen(psb->auth_login));
meillo@10 627 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 628 fflush(psb->out);
meillo@177 629 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 630 g_free(reply64);
meillo@10 631 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 632 if ((ok = check_response(psb, TRUE))) {
meillo@10 633 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 634 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 635 resp = base64_decode(resp64, &resp_size);
meillo@10 636 g_free(resp64);
meillo@114 637 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 638 g_free(resp);
meillo@10 639 reply64 = base64_encode(psb->auth_secret, strlen(psb->auth_secret));
meillo@10 640 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 641 fflush(psb->out);
meillo@177 642 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 643 g_free(reply64);
meillo@10 644 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 645 ok = check_response(psb, FALSE);
meillo@10 646 }
meillo@10 647 }
meillo@10 648 }
meillo@0 649 }
meillo@10 650 return ok;
meillo@0 651 }
meillo@0 652
meillo@10 653 gboolean
meillo@10 654 smtp_out_auth(smtp_base * psb)
meillo@0 655 {
meillo@10 656 gboolean ok = FALSE;
meillo@10 657 gint i = 0;
meillo@10 658 while (psb->auth_names[i]) {
meillo@10 659 if (strcasecmp(psb->auth_names[i], psb->auth_name) == 0)
meillo@10 660 break;
meillo@10 661 i++;
meillo@10 662 }
meillo@10 663 if (psb->auth_names[i]) {
meillo@10 664 if (strcasecmp(psb->auth_name, "cram-md5") == 0) {
meillo@10 665 smtp_out_auth_cram_md5(psb);
meillo@10 666 } else if (strcasecmp(psb->auth_name, "login") == 0) {
meillo@10 667 smtp_out_auth_login(psb);
meillo@10 668 } else {
meillo@10 669 logwrite(LOG_ERR, "auth method %s not supported\n", psb->auth_name);
meillo@10 670 }
meillo@10 671 } else {
meillo@10 672 logwrite(LOG_ERR, "no auth method %s found.\n", psb->auth_name);
meillo@10 673 }
meillo@10 674 return ok;
meillo@0 675 }
meillo@0 676
meillo@0 677 #endif
meillo@0 678
meillo@10 679 gboolean
meillo@10 680 smtp_out_init(smtp_base * psb)
meillo@0 681 {
meillo@10 682 gboolean ok;
meillo@0 683
meillo@10 684 if ((ok = read_response(psb, SMTP_INITIAL_TIMEOUT))) {
meillo@10 685 if ((ok = check_init_response(psb))) {
meillo@10 686
meillo@10 687 if ((ok = smtp_helo(psb, psb->helo_name))) {
meillo@0 688 #ifdef ENABLE_AUTH
meillo@10 689 if (psb->auth_name && psb->use_auth) {
meillo@10 690 /* we completely disregard the response of server here. If
meillo@10 691 authentication fails, the server will complain later
meillo@10 692 anyway. I know, this is not polite... */
meillo@10 693 smtp_out_auth(psb);
meillo@10 694 }
meillo@10 695 #endif
meillo@10 696 }
meillo@10 697 }
meillo@0 698 }
meillo@10 699 if (!ok)
meillo@10 700 smtp_out_log_failure(psb, NULL);
meillo@10 701 return ok;
meillo@0 702 }
meillo@0 703
meillo@10 704 gint
meillo@10 705 smtp_out_msg(smtp_base * psb, message * msg, address * return_path, GList * rcpt_list, GList * hdr_list)
meillo@0 706 {
meillo@10 707 gint i, size;
meillo@10 708 gboolean ok = TRUE;
meillo@10 709 int rcpt_cnt;
meillo@10 710 int rcpt_accept = 0;
meillo@0 711
meillo@10 712 DEBUG(5) debugf("smtp_out_msg entered\n");
meillo@0 713
meillo@10 714 /* defaults: */
meillo@10 715 if (return_path == NULL)
meillo@10 716 return_path = msg->return_path;
meillo@10 717 if (hdr_list == NULL)
meillo@10 718 hdr_list = msg->hdr_list;
meillo@10 719 if (rcpt_list == NULL)
meillo@10 720 rcpt_list = msg->rcpt_list;
meillo@10 721 rcpt_cnt = g_list_length(rcpt_list);
meillo@0 722
meillo@10 723 size = msg_calc_size(msg, TRUE);
meillo@0 724
meillo@10 725 /* respect maximum size given by server: */
meillo@10 726 if ((psb->max_size > 0) && (size > psb->max_size)) {
meillo@114 727 logwrite(LOG_WARNING, "%s == host=%s message size (%d) > "
meillo@114 728 "fixed maximum message size of server (%d)",
meillo@10 729 msg->uid, psb->remote_host, size, psb->max_size);
meillo@10 730 psb->error = smtp_cancel;
meillo@10 731 ok = FALSE;
meillo@10 732 }
meillo@0 733
meillo@10 734 if (ok) {
meillo@119 735 /* pretend the message is a bit larger,
meillo@119 736 just in case the size calculation is buggy */
meillo@119 737 smtp_cmd_mailfrom(psb, return_path, psb->use_size ? size+SMTP_SIZE_ADD : 0);
meillo@0 738
meillo@10 739 if (!psb->use_pipelining) {
meillo@10 740 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 741 ok = check_response(psb, FALSE);
meillo@10 742 }
meillo@10 743 }
meillo@10 744 if (ok) {
meillo@10 745 GList *rcpt_node;
meillo@10 746 rcpt_accept = 0;
meillo@0 747
meillo@10 748 for (rcpt_node = g_list_first(rcpt_list); rcpt_node != NULL; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 749 address *rcpt = (address *) (rcpt_node->data);
meillo@10 750 smtp_cmd_rcptto(psb, rcpt);
meillo@10 751 if (!psb->use_pipelining) {
meillo@10 752 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 753 if (check_response(psb, FALSE)) {
meillo@10 754 rcpt_accept++;
meillo@10 755 addr_mark_delivered(rcpt);
meillo@10 756 } else {
meillo@10 757 /* if server returned an error for one recp. we
meillo@10 758 may still try the others. But if it is a timeout, eof
meillo@10 759 or unexpected response, it is more serious and we should
meillo@10 760 give up. */
meillo@10 761 if ((psb->error != smtp_trylater) && (psb->error != smtp_fail)) {
meillo@10 762 ok = FALSE;
meillo@10 763 break;
meillo@10 764 } else {
meillo@114 765 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n",
meillo@15 766 msg->uid, addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 767 if (psb->error == smtp_trylater) {
meillo@10 768 addr_mark_defered(rcpt);
meillo@10 769 } else {
meillo@10 770 addr_mark_failed(rcpt);
meillo@10 771 }
meillo@10 772 }
meillo@10 773 } else
meillo@10 774 break;
meillo@10 775 }
meillo@10 776 }
meillo@0 777
meillo@10 778 /* There is no point in going on if no recp.s were accpted.
meillo@10 779 But we can check that at this point only if not pipelining: */
meillo@10 780 ok = (ok && (psb->use_pipelining || (rcpt_accept > 0)));
meillo@10 781 if (ok) {
meillo@0 782
meillo@10 783 fprintf(psb->out, "DATA\r\n");
meillo@10 784 fflush(psb->out);
meillo@0 785
meillo@177 786 DEBUG(4) debugf("C: DATA\r\n");
meillo@10 787
meillo@10 788 if (psb->use_pipelining) {
meillo@10 789 /* the first pl'ed command was MAIL FROM
meillo@10 790 the last was DATA, whose response can be handled by the 'normal' code
meillo@10 791 all in between were RCPT TO:
meillo@10 792 */
meillo@10 793 /* response to MAIL FROM: */
meillo@10 794 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 795 if ((ok = check_response(psb, FALSE))) {
meillo@10 796
meillo@10 797 /* response(s) to RCPT TO:
meillo@10 798 this is very similar to the sequence above for no pipeline
meillo@10 799 */
meillo@10 800 for (i = 0; i < rcpt_cnt; i++) {
meillo@10 801 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 802 address *rcpt = g_list_nth_data(rcpt_list, i);
meillo@10 803 if (check_response(psb, FALSE)) {
meillo@10 804 rcpt_accept++;
meillo@10 805 addr_mark_delivered(rcpt);
meillo@10 806 } else {
meillo@10 807 /* if server returned an error 4xx or 5xx for one recp. we
meillo@10 808 may still try the others. But if it is a timeout, eof
meillo@10 809 or unexpected response, it is more serious and we
meillo@10 810 should give up. */
meillo@10 811 if ((psb->error != smtp_trylater) &&
meillo@10 812 (psb->error != smtp_fail)) {
meillo@10 813 ok = FALSE;
meillo@10 814 break;
meillo@10 815 } else {
meillo@114 816 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n", msg->uid,
meillo@10 817 addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 818 if (psb->error == smtp_trylater) {
meillo@10 819 addr_mark_defered(rcpt);
meillo@10 820 } else {
meillo@10 821 addr_mark_failed(rcpt);
meillo@10 822 }
meillo@10 823 }
meillo@10 824 }
meillo@10 825 } else {
meillo@10 826 DEBUG(5) debugf("check_response failed after RCPT TO\n");
meillo@10 827 break;
meillo@10 828 }
meillo@10 829 }
meillo@10 830 if (rcpt_accept == 0)
meillo@10 831 ok = FALSE;
meillo@10 832 } else {
meillo@10 833 DEBUG(5) debugf("check_response failed after MAIL FROM\n");
meillo@10 834 }
meillo@10 835 } else {
meillo@10 836 DEBUG(5)
meillo@10 837 debugf("read_response failed after MAIL FROM\n");
meillo@10 838 }
meillo@10 839 }
meillo@10 840
meillo@10 841 /* if(psb->use_pipelining) */
meillo@10 842 /* response to the DATA cmd */
meillo@10 843 if (ok) {
meillo@10 844 if (read_response(psb, SMTP_DATA_TIMEOUT)) {
meillo@10 845 if (check_response(psb, TRUE)) {
meillo@10 846 send_header(psb, hdr_list);
meillo@10 847 send_data(psb, msg);
meillo@10 848
meillo@10 849 if (read_response(psb, SMTP_FINAL_TIMEOUT))
meillo@10 850 ok = check_response(psb, FALSE);
meillo@10 851 }
meillo@10 852 }
meillo@10 853 }
meillo@0 854 }
meillo@10 855 }
meillo@10 856
meillo@10 857 DEBUG(5) {
meillo@114 858 debugf("smtp_out_msg():\n");
meillo@114 859 debugf(" psb->error = %d\n", psb->error);
meillo@114 860 debugf(" ok = %d\n", ok);
meillo@114 861 debugf(" rcpt_accept = %d\n", rcpt_accept);
meillo@10 862 }
meillo@10 863
meillo@10 864 if (psb->error == smtp_ok) {
meillo@10 865 GList *rcpt_node;
meillo@10 866 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 867 address *rcpt = (address *) (rcpt_node->data);
meillo@10 868 if (addr_is_delivered(rcpt))
meillo@10 869 logwrite(LOG_NOTICE, "%s => %s host=%s with %s\n", msg->uid, addr_string(rcpt),
meillo@10 870 psb->remote_host, psb->use_esmtp ? "esmtp" : "smtp");
meillo@0 871 }
meillo@10 872 } else {
meillo@10 873 /* if something went wrong,
meillo@10 874 we have to unmark the rcpts prematurely marked as delivered
meillo@10 875 and mark the status */
meillo@10 876 smtp_out_mark_rcpts(psb, rcpt_list);
meillo@10 877
meillo@10 878 /* log the failure: */
meillo@10 879 smtp_out_log_failure(psb, msg);
meillo@0 880 }
meillo@10 881 return rcpt_accept;
meillo@0 882 }
meillo@0 883
meillo@10 884 gboolean
meillo@10 885 smtp_out_quit(smtp_base * psb)
meillo@0 886 {
meillo@10 887 fprintf(psb->out, "QUIT\r\n");
meillo@10 888 fflush(psb->out);
meillo@0 889
meillo@177 890 DEBUG(4) debugf("C: QUIT\n");
meillo@0 891
meillo@10 892 signal(SIGALRM, SIG_DFL);
meillo@10 893
meillo@10 894 return TRUE;
meillo@0 895 }
meillo@10 896
meillo@10 897 gint
meillo@10 898 smtp_deliver(gchar * host, gint port, GList * resolve_list, message * msg, address * return_path, GList * rcpt_list)
meillo@0 899 {
meillo@10 900 smtp_base *psb;
meillo@10 901 smtp_error err;
meillo@0 902
meillo@10 903 DEBUG(5) debugf("smtp_deliver entered\n");
meillo@0 904
meillo@10 905 if (return_path == NULL)
meillo@10 906 return_path = msg->return_path;
meillo@0 907
meillo@10 908 if ((psb = smtp_out_open(host, port, resolve_list))) {
meillo@10 909 set_heloname(psb, return_path->domain, TRUE);
meillo@10 910 /* initiate connection, send message and quit: */
meillo@10 911 if (smtp_out_init(psb)) {
meillo@10 912 smtp_out_msg(psb, msg, return_path, rcpt_list, NULL);
meillo@10 913 if (psb->error == smtp_ok || (psb->error == smtp_fail) || (psb->error == smtp_trylater)
meillo@10 914 || (psb->error == smtp_syntax) || (psb->error == smtp_cancel))
meillo@10 915 smtp_out_quit(psb);
meillo@10 916 }
meillo@10 917
meillo@10 918 err = psb->error;
meillo@10 919 destroy_smtpbase(psb);
meillo@10 920
meillo@10 921 return err;
meillo@10 922 }
meillo@10 923 return -1;
meillo@0 924 }