masqmail

annotate src/smtp_out.c @ 246:4cff8638dd9b

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SMTP client: tries EHLO now always first Changed the behavior of the SMTP client. Now always an EHLO greeting is sent, no matter what kind of greeting text the server had sent. If the EHLO failed, an HELO greeting is tried as fall back. This is the behavior RFC 2821 requires (section 3.2). This change will fix setups that were not possible to sent to a server because that requires AUTH but hadn't said ``ESMTP'' in its greeting message. See also: Debian bug #349211 Thanks to Steffen (inne)
author markus schnalke <meillo@marmaro.de>
date Thu, 28 Oct 2010 16:40:02 -0300
parents 589c365d90b1
children c74adb7c4f50
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_size = FALSE;
meillo@10 125 psb->use_pipelining = FALSE;
meillo@10 126 psb->use_auth = FALSE;
meillo@0 127
meillo@10 128 psb->max_size = 0;
meillo@10 129 psb->auth_names = NULL;
meillo@0 130
meillo@10 131 psb->buffer = (gchar *) g_malloc(SMTP_BUF_LEN);
meillo@0 132
meillo@10 133 dup_sock = dup(sock);
meillo@10 134 psb->out = fdopen(sock, "w");
meillo@10 135 psb->in = fdopen(dup_sock, "r");
meillo@0 136
meillo@10 137 psb->error = smtp_ok;
meillo@0 138
meillo@10 139 psb->helo_name = NULL;
meillo@0 140
meillo@10 141 psb->auth_name = psb->auth_login = psb->auth_secret = NULL;
meillo@10 142
meillo@10 143 return psb;
meillo@0 144 }
meillo@0 145
meillo@10 146 static gboolean
meillo@10 147 read_response(smtp_base * psb, int timeout)
meillo@0 148 {
meillo@10 149 gint buf_pos = 0;
meillo@10 150 gchar code[5];
meillo@10 151 gint i, len;
meillo@0 152
meillo@10 153 do {
meillo@10 154 len = read_sockline(psb->in, &(psb->buffer[buf_pos]), SMTP_BUF_LEN - buf_pos, timeout, READSOCKL_CHUG);
meillo@10 155 if (len == -3) {
meillo@10 156 psb->error = smtp_timeout;
meillo@10 157 return FALSE;
meillo@10 158 } else if (len == -2) {
meillo@10 159 psb->error = smtp_syntax;
meillo@10 160 return FALSE;
meillo@10 161 } else if (len == -1) {
meillo@10 162 psb->error = smtp_eof;
meillo@10 163 return FALSE;
meillo@10 164 }
meillo@10 165 for (i = 0; i < 4; i++)
meillo@10 166 code[i] = psb->buffer[buf_pos + i];
meillo@15 167 code[i] = '\0';
meillo@10 168 psb->last_code = atoi(code);
meillo@0 169
meillo@10 170 buf_pos += len;
meillo@0 171
meillo@10 172 } while (code[3] == '-');
meillo@177 173 if (psb->buffer) {
meillo@177 174 DEBUG(4) debugf("S: %s\n", psb->buffer);
meillo@177 175 }
meillo@0 176
meillo@10 177 return TRUE;
meillo@0 178 }
meillo@0 179
meillo@10 180 static gboolean
meillo@10 181 check_response(smtp_base * psb, gboolean after_data)
meillo@0 182 {
meillo@10 183 char c = psb->buffer[0];
meillo@0 184
meillo@10 185 if (((c == '2') && !after_data) || ((c == '3') && after_data)) {
meillo@10 186 psb->error = smtp_ok;
meillo@176 187 DEBUG(6) debugf("response OK:'%s' after_data = %d\n", psb->buffer, (int) after_data);
meillo@10 188 return TRUE;
meillo@10 189 } else {
meillo@10 190 if (c == '4')
meillo@10 191 psb->error = smtp_trylater;
meillo@10 192 else if (c == '5')
meillo@10 193 psb->error = smtp_fail;
meillo@10 194 else
meillo@10 195 psb->error = smtp_syntax;
meillo@176 196 DEBUG(6) debugf("response failure:'%s' after_data = %d\n", psb->buffer, (int) after_data);
meillo@10 197 return FALSE;
meillo@10 198 }
meillo@0 199 }
meillo@0 200
meillo@10 201 static gchar*
meillo@10 202 get_response_arg(gchar * response)
meillo@0 203 {
meillo@10 204 gchar buf[SMTP_BUF_LEN];
meillo@10 205 gchar *p = response, *q = buf;
meillo@0 206
meillo@10 207 while (*p && (*p != '\n') && isspace(*p))
meillo@10 208 p++;
meillo@10 209 if (*p && (*p != '\n')) {
meillo@10 210 while (*p && (*p != '\n') && (*p != '\r') && (q < buf + SMTP_BUF_LEN - 1))
meillo@10 211 *(q++) = *(p++);
meillo@15 212 *q = '\0';
meillo@10 213 return g_strdup(buf);
meillo@10 214 }
meillo@10 215 return NULL;
meillo@0 216 }
meillo@0 217
meillo@10 218 static gboolean
meillo@10 219 check_helo_response(smtp_base * psb)
meillo@0 220 {
meillo@222 221 gchar *ptr;
meillo@0 222
meillo@10 223 if (!check_response(psb, FALSE))
meillo@10 224 return FALSE;
meillo@0 225
meillo@222 226 if (psb->last_code == 220) {
meillo@222 227 logwrite(LOG_NOTICE, "received a 220 greeting after sending EHLO,\n");
meillo@222 228 logwrite(LOG_NOTICE, "please remove `instant_helo' from your route config\n");
meillo@222 229 /* read the next response, cause that's the actual helo response */
meillo@222 230 if (!read_response(psb, SMTP_CMD_TIMEOUT) || !check_response(psb, FALSE)) {
meillo@222 231 return FALSE;
meillo@222 232 }
meillo@222 233 }
meillo@222 234
meillo@222 235 ptr = psb->buffer;
meillo@222 236
meillo@10 237 while (*ptr) {
meillo@10 238 if (strncasecmp(&(ptr[4]), "SIZE", 4) == 0) {
meillo@10 239 gchar *arg;
meillo@10 240 psb->use_size = TRUE;
meillo@10 241 arg = get_response_arg(&(ptr[8]));
meillo@10 242 if (arg) {
meillo@10 243 psb->max_size = atoi(arg);
meillo@10 244 g_free(arg);
meillo@10 245 }
meillo@10 246 }
meillo@0 247
meillo@10 248 if (strncasecmp(&(ptr[4]), "PIPELINING", 10) == 0)
meillo@10 249 psb->use_pipelining = TRUE;
meillo@0 250
meillo@10 251 if (strncasecmp(&(ptr[4]), "AUTH", 4) == 0) {
meillo@10 252 if ((ptr[8] == ' ') || (ptr[8] == '=') || (ptr[8] == '\t')) { /* not sure about '\t' */
meillo@10 253 gchar *arg;
meillo@10 254 psb->use_auth = TRUE;
meillo@10 255 arg = get_response_arg(&(ptr[9])); /* after several years I finally learnt to count */
meillo@10 256 if (arg) {
meillo@10 257 psb->auth_names = g_strsplit(arg, " ", 0);
meillo@10 258 g_free(arg);
meillo@10 259
meillo@10 260 DEBUG(4) {
meillo@10 261 gint i = 0;
meillo@114 262 debugf("in check_helo_response()\n");
meillo@10 263 while (psb->auth_names[i]) {
meillo@114 264 debugf(" offered AUTH %s\n", psb->auth_names[i]);
meillo@10 265 i++;
meillo@10 266 }
meillo@10 267 }
meillo@10 268 }
meillo@10 269 }
meillo@10 270 }
meillo@10 271
meillo@10 272 while (*ptr != '\n')
meillo@10 273 ptr++;
meillo@10 274 ptr++;
meillo@0 275 }
meillo@0 276
meillo@10 277 DEBUG(4) {
meillo@114 278 debugf(" %s\n", psb->use_size ? "uses SIZE" : "no size");
meillo@114 279 debugf(" %s\n", psb->use_pipelining ? "uses PIPELINING" : "no pipelining");
meillo@114 280 debugf(" %s\n", psb->use_auth ? "uses AUTH" : "no auth");
meillo@10 281 }
meillo@0 282
meillo@10 283 return TRUE;
meillo@0 284 }
meillo@0 285
meillo@246 286 /*
meillo@246 287 We first try EHLO, but if it fails HELO in a second fall back try.
meillo@246 288 This is what is requested by RFC 2821 (sec 3.2):
meillo@246 289
meillo@246 290 Once the server has sent the welcoming message and
meillo@246 291 the client has received it, the client normally sends
meillo@246 292 the EHLO command to the server, [...]
meillo@246 293 For a particular connection attempt, if the server
meillo@246 294 returns a "command not recognized" response to EHLO,
meillo@246 295 the client SHOULD be able to fall back and send HELO.
meillo@246 296
meillo@246 297 Up to and including version 0.3.0 masqmail used ESMTP only if the
meillo@246 298 string ``ESMTP'' appeared within the server's greeting message. This
meillo@246 299 made it impossible to use AUTH with servers that would send odd
meillo@246 300 greeting messages.
meillo@246 301 */
meillo@10 302 static gboolean
meillo@10 303 smtp_helo(smtp_base * psb, gchar * helo)
meillo@0 304 {
meillo@246 305 fprintf(psb->out, "EHLO %s\r\n", helo);
meillo@246 306 fflush(psb->out);
meillo@246 307 DEBUG(4) debugf("C: EHLO %s\r\n", helo);
meillo@0 308
meillo@246 309 if (!read_response(psb, SMTP_CMD_TIMEOUT)) {
meillo@246 310 return FALSE;
meillo@246 311 }
meillo@246 312 if (check_helo_response(psb)) {
meillo@246 313 DEBUG(4) debugf("uses esmtp\n");
meillo@246 314 return TRUE;
meillo@246 315 }
meillo@0 316
meillo@246 317 if (psb->error != smtp_fail) {
meillo@246 318 return FALSE;
meillo@246 319 }
meillo@0 320
meillo@246 321 /* our guess that server understands EHLO could have been wrong,
meillo@246 322 try again with HELO */
meillo@0 323
meillo@246 324 fprintf(psb->out, "HELO %s\r\n", helo);
meillo@246 325 fflush(psb->out);
meillo@246 326 DEBUG(4) debugf("C: HELO %s\r\n", helo);
meillo@0 327
meillo@246 328 if (!read_response(psb, SMTP_CMD_TIMEOUT)) {
meillo@246 329 return FALSE;
meillo@246 330 }
meillo@246 331 if (check_helo_response(psb)) {
meillo@246 332 DEBUG(4) debugf("uses smtp\n");
meillo@246 333 return TRUE;
meillo@246 334 }
meillo@10 335
meillo@246 336 /* what sort of server ist THAT ?! give up... */
meillo@246 337 return FALSE;
meillo@0 338 }
meillo@0 339
meillo@10 340 static void
meillo@10 341 smtp_cmd_mailfrom(smtp_base * psb, address * return_path, guint size)
meillo@0 342 {
meillo@10 343 if (psb->use_size) {
meillo@10 344 fprintf(psb->out, "MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@10 345 fflush(psb->out);
meillo@0 346
meillo@177 347 DEBUG(4) debugf("C: MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@0 348
meillo@10 349 } else {
meillo@10 350 fprintf(psb->out, "MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 351 fflush(psb->out);
meillo@0 352
meillo@177 353 DEBUG(4) debugf("C: MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 354 }
meillo@0 355 }
meillo@0 356
meillo@10 357 static void
meillo@10 358 smtp_cmd_rcptto(smtp_base * psb, address * rcpt)
meillo@0 359 {
meillo@10 360 fprintf(psb->out, "RCPT TO:%s\r\n", addr_string(rcpt));
meillo@10 361 fflush(psb->out);
meillo@177 362 DEBUG(4) debugf("C: RCPT TO:%s\n", addr_string(rcpt));
meillo@0 363 }
meillo@0 364
meillo@10 365 static void
meillo@10 366 send_data_line(smtp_base * psb, gchar * data)
meillo@0 367 {
meillo@10 368 /* According to RFC 821 each line should be terminated with CRLF.
meillo@10 369 Since a dot on a line itself marks the end of data, each line
meillo@10 370 beginning with a dot is prepended with another dot.
meillo@10 371 */
meillo@10 372 gchar *ptr;
meillo@15 373 gboolean new_line = TRUE; /* previous versions assumed that each item was exactly one line.
meillo@15 374 This is no longer the case */
meillo@0 375
meillo@10 376 ptr = data;
meillo@10 377 while (*ptr) {
meillo@10 378 int c = (int) (*ptr);
meillo@119 379 if (c == '.' && new_line) {
meillo@119 380 /* dot-stuffing */
meillo@119 381 putc('.', psb->out);
meillo@119 382 }
meillo@10 383 if (c == '\n') {
meillo@119 384 /* CRLF line terminators */
meillo@10 385 putc('\r', psb->out);
meillo@10 386 putc('\n', psb->out);
meillo@10 387 new_line = TRUE;
meillo@10 388 } else {
meillo@10 389 putc(c, psb->out);
meillo@10 390 new_line = FALSE;
meillo@10 391 }
meillo@10 392 ptr++;
meillo@10 393 }
meillo@0 394 }
meillo@0 395
meillo@10 396 static void
meillo@10 397 send_header(smtp_base * psb, GList * hdr_list)
meillo@0 398 {
meillo@10 399 GList *node;
meillo@10 400 gint num_hdrs = 0;
meillo@0 401
meillo@10 402 /* header */
meillo@10 403 if (hdr_list) {
meillo@10 404 foreach(hdr_list, node) {
meillo@10 405 if (node->data) {
meillo@10 406 header *hdr = (header *) (node->data);
meillo@10 407 if (hdr->header) {
meillo@10 408 send_data_line(psb, hdr->header);
meillo@10 409 num_hdrs++;
meillo@10 410 }
meillo@10 411 }
meillo@10 412 }
meillo@0 413 }
meillo@0 414
meillo@10 415 /* empty line separating headers from data: */
meillo@10 416 putc('\r', psb->out);
meillo@10 417 putc('\n', psb->out);
meillo@0 418
meillo@10 419 DEBUG(4) debugf("sent %d headers\n", num_hdrs);
meillo@0 420 }
meillo@0 421
meillo@10 422 static void
meillo@10 423 send_data(smtp_base * psb, message * msg)
meillo@0 424 {
meillo@10 425 GList *node;
meillo@10 426 gint num_lines = 0;
meillo@0 427
meillo@10 428 /* data */
meillo@10 429 if (msg->data_list) {
meillo@10 430 for (node = g_list_first(msg->data_list); node; node = g_list_next(node)) {
meillo@10 431 if (node->data) {
meillo@10 432 send_data_line(psb, node->data);
meillo@10 433 num_lines++;
meillo@10 434 }
meillo@10 435 }
meillo@10 436 }
meillo@0 437
meillo@10 438 DEBUG(4) debugf("sent %d lines of data\n", num_lines);
meillo@0 439
meillo@10 440 fprintf(psb->out, ".\r\n");
meillo@10 441 fflush(psb->out);
meillo@177 442 DEBUG(4) debugf("C: .\n");
meillo@0 443 }
meillo@0 444
meillo@10 445 void
meillo@10 446 smtp_out_mark_rcpts(smtp_base * psb, GList * rcpt_list)
meillo@0 447 {
meillo@10 448 GList *rcpt_node;
meillo@10 449 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 450 address *rcpt = (address *) (rcpt_node->data);
meillo@0 451
meillo@10 452 addr_unmark_delivered(rcpt);
meillo@0 453
meillo@10 454 if ((psb->error == smtp_trylater) || (psb->error == smtp_timeout) || (psb->error == smtp_eof)) {
meillo@10 455 addr_mark_defered(rcpt);
meillo@10 456 } else {
meillo@10 457 addr_mark_failed(rcpt);
meillo@10 458 }
meillo@10 459 }
meillo@0 460 }
meillo@0 461
meillo@10 462 void
meillo@10 463 smtp_out_log_failure(smtp_base * psb, message * msg)
meillo@0 464 {
meillo@10 465 gchar *err_str;
meillo@0 466
meillo@10 467 if (psb->error == smtp_timeout)
meillo@10 468 err_str = g_strdup("connection timed out.");
meillo@10 469 else if (psb->error == smtp_eof)
meillo@10 470 err_str = g_strdup("connection terminated prematurely.");
meillo@10 471 else if (psb->error == smtp_syntax)
meillo@10 472 err_str = g_strdup_printf("got unexpected response: %s", psb->buffer);
meillo@10 473 else if (psb->error == smtp_cancel)
meillo@10 474 err_str = g_strdup("delivery was canceled.\n");
meillo@10 475 else
meillo@10 476 /* error message should still be in the buffer */
meillo@10 477 err_str = g_strdup_printf("failed: %s\n", psb->buffer);
meillo@0 478
meillo@10 479 if (msg == NULL)
meillo@10 480 logwrite(LOG_NOTICE, "host=%s %s\n", psb->remote_host, err_str);
meillo@10 481 else
meillo@10 482 logwrite(LOG_NOTICE, "%s == host=%s %s\n", msg->uid, psb->remote_host, err_str);
meillo@0 483
meillo@10 484 g_free(err_str);
meillo@0 485 }
meillo@0 486
meillo@10 487 smtp_base*
meillo@10 488 smtp_out_open(gchar * host, gint port, GList * resolve_list)
meillo@0 489 {
meillo@10 490 smtp_base *psb;
meillo@10 491 gint sock;
meillo@10 492 mxip_addr *addr;
meillo@0 493
meillo@10 494 DEBUG(5) debugf("smtp_out_open entered, host = %s\n", host);
meillo@0 495
meillo@10 496 if ((addr = connect_resolvelist(&sock, host, port, resolve_list))) {
meillo@10 497 /* create structure to hold status data: */
meillo@10 498 psb = create_smtpbase(sock);
meillo@10 499 psb->remote_host = addr->name;
meillo@0 500
meillo@10 501 DEBUG(5) {
meillo@10 502 struct sockaddr_in name;
meillo@10 503 int len = sizeof(struct sockaddr);
meillo@10 504 getsockname(sock, (struct sockaddr *) (&name), &len);
meillo@10 505 debugf("socket: name.sin_addr = %s\n", inet_ntoa(name.sin_addr));
meillo@10 506 }
meillo@10 507 return psb;
meillo@10 508 } else {
meillo@10 509 DEBUG(5) debugf("connect_resolvelist failed: %s %s\n", strerror(errno), hstrerror(h_errno));
meillo@10 510 }
meillo@0 511
meillo@10 512 return NULL;
meillo@0 513 }
meillo@0 514
meillo@10 515 smtp_base*
meillo@10 516 smtp_out_open_child(gchar * cmd)
meillo@0 517 {
meillo@10 518 smtp_base *psb;
meillo@10 519 gint sock;
meillo@0 520
meillo@10 521 DEBUG(5) debugf("smtp_out_open_child entered, cmd = %s\n", cmd);
meillo@0 522
meillo@10 523 sock = child(cmd);
meillo@0 524
meillo@10 525 if (sock > 0) {
meillo@10 526 psb = create_smtpbase(sock);
meillo@10 527 psb->remote_host = NULL;
meillo@0 528
meillo@10 529 return psb;
meillo@10 530 }
meillo@0 531
meillo@10 532 return NULL;
meillo@0 533 }
meillo@0 534
meillo@10 535 gboolean
meillo@10 536 smtp_out_rset(smtp_base * psb)
meillo@0 537 {
meillo@10 538 gboolean ok;
meillo@0 539
meillo@10 540 fprintf(psb->out, "RSET\r\n");
meillo@10 541 fflush(psb->out);
meillo@177 542 DEBUG(4) debugf("C: RSET\n");
meillo@0 543
meillo@10 544 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 545 if (check_response(psb, FALSE))
meillo@10 546 return TRUE;
meillo@0 547
meillo@10 548 smtp_out_log_failure(psb, NULL);
meillo@10 549
meillo@10 550 return FALSE;
meillo@0 551 }
meillo@0 552
meillo@0 553 #ifdef ENABLE_AUTH
meillo@0 554
meillo@10 555 static gboolean
meillo@10 556 smtp_out_auth_cram_md5(smtp_base * psb)
meillo@0 557 {
meillo@10 558 gboolean ok = FALSE;
meillo@0 559
meillo@177 560 fprintf(psb->out, "C: AUTH CRAM-MD5\r\n");
meillo@10 561 fflush(psb->out);
meillo@10 562 DEBUG(4) debugf("AUTH CRAM-MD5\n");
meillo@10 563 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 564 if ((ok = check_response(psb, TRUE))) {
meillo@10 565 gchar *chall64 = get_response_arg(&(psb->buffer[4]));
meillo@10 566 gint chall_size;
meillo@10 567 gchar *chall = base64_decode(chall64, &chall_size);
meillo@10 568 guchar digest[16], *reply64, *reply;
meillo@10 569 gchar digest_string[33];
meillo@10 570 gint i;
meillo@0 571 #ifdef USE_LIB_CRYPTO
meillo@10 572 unsigned int digest_len;
meillo@0 573 #endif
meillo@10 574
meillo@114 575 DEBUG(5) debugf("smtp_out_auth_cram_md5():\n");
meillo@114 576 DEBUG(5) debugf(" encoded challenge = %s\n", chall64);
meillo@114 577 DEBUG(5) debugf(" decoded challenge = %s, size = %d\n", chall, chall_size);
meillo@114 578 DEBUG(5) debugf(" secret = %s\n", psb->auth_secret);
meillo@10 579
meillo@0 580 #ifdef USE_LIB_CRYPTO
meillo@10 581 HMAC(EVP_md5(), psb->auth_secret, strlen(psb->auth_secret), chall, chall_size, digest, &digest_len);
meillo@0 582 #else
meillo@10 583 hmac_md5(chall, chall_size, psb->auth_secret, strlen(psb->auth_secret), digest);
meillo@0 584 #endif
meillo@10 585
meillo@10 586 for (i = 0; i < 16; i++)
meillo@10 587 sprintf(&(digest_string[i + i]), "%02x", (unsigned int) (digest[i]));
meillo@15 588 digest_string[32] = '\0';
meillo@10 589
meillo@114 590 DEBUG(5) debugf(" digest = %s\n", digest_string);
meillo@10 591
meillo@10 592 reply = g_strdup_printf("%s %s", psb->auth_login, digest_string);
meillo@114 593 DEBUG(5) debugf(" unencoded reply = %s\n", reply);
meillo@10 594
meillo@10 595 reply64 = base64_encode(reply, strlen(reply));
meillo@114 596 DEBUG(5) debugf(" encoded reply = %s\n", reply64);
meillo@10 597
meillo@10 598 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 599 fflush(psb->out);
meillo@177 600 DEBUG(6) debugf(" reply64 = %s\n", reply64);
meillo@177 601 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 602
meillo@10 603 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 604 ok = check_response(psb, FALSE);
meillo@10 605
meillo@10 606 g_free(reply64);
meillo@10 607 g_free(reply);
meillo@10 608 g_free(chall);
meillo@10 609 g_free(chall64);
meillo@10 610 }
meillo@10 611 }
meillo@10 612 return ok;
meillo@0 613 }
meillo@0 614
meillo@10 615 static gboolean
meillo@10 616 smtp_out_auth_login(smtp_base * psb)
meillo@0 617 {
meillo@10 618 gboolean ok = FALSE;
meillo@10 619 fprintf(psb->out, "AUTH LOGIN\r\n");
meillo@10 620 fflush(psb->out);
meillo@177 621 DEBUG(4) debugf("C: AUTH LOGIN\r\n");
meillo@10 622 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 623 if ((ok = check_response(psb, TRUE))) {
meillo@10 624 gchar *resp64;
meillo@10 625 guchar *resp;
meillo@10 626 gint resp_size;
meillo@10 627 gchar *reply64;
meillo@10 628
meillo@114 629 DEBUG(5) debugf("smtp_out_auth_login():\n");
meillo@10 630 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 631 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 632 resp = base64_decode(resp64, &resp_size);
meillo@10 633 g_free(resp64);
meillo@114 634 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 635 g_free(resp);
meillo@10 636 reply64 = base64_encode(psb->auth_login, strlen(psb->auth_login));
meillo@10 637 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 638 fflush(psb->out);
meillo@177 639 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 640 g_free(reply64);
meillo@10 641 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 642 if ((ok = check_response(psb, TRUE))) {
meillo@10 643 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 644 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 645 resp = base64_decode(resp64, &resp_size);
meillo@10 646 g_free(resp64);
meillo@114 647 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 648 g_free(resp);
meillo@10 649 reply64 = base64_encode(psb->auth_secret, strlen(psb->auth_secret));
meillo@10 650 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 651 fflush(psb->out);
meillo@177 652 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 653 g_free(reply64);
meillo@10 654 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 655 ok = check_response(psb, FALSE);
meillo@10 656 }
meillo@10 657 }
meillo@10 658 }
meillo@0 659 }
meillo@10 660 return ok;
meillo@0 661 }
meillo@0 662
meillo@10 663 gboolean
meillo@10 664 smtp_out_auth(smtp_base * psb)
meillo@0 665 {
meillo@10 666 gboolean ok = FALSE;
meillo@10 667 gint i = 0;
meillo@10 668 while (psb->auth_names[i]) {
meillo@10 669 if (strcasecmp(psb->auth_names[i], psb->auth_name) == 0)
meillo@10 670 break;
meillo@10 671 i++;
meillo@10 672 }
meillo@10 673 if (psb->auth_names[i]) {
meillo@10 674 if (strcasecmp(psb->auth_name, "cram-md5") == 0) {
meillo@10 675 smtp_out_auth_cram_md5(psb);
meillo@10 676 } else if (strcasecmp(psb->auth_name, "login") == 0) {
meillo@10 677 smtp_out_auth_login(psb);
meillo@10 678 } else {
meillo@10 679 logwrite(LOG_ERR, "auth method %s not supported\n", psb->auth_name);
meillo@10 680 }
meillo@10 681 } else {
meillo@10 682 logwrite(LOG_ERR, "no auth method %s found.\n", psb->auth_name);
meillo@10 683 }
meillo@10 684 return ok;
meillo@0 685 }
meillo@0 686
meillo@0 687 #endif
meillo@0 688
meillo@10 689 gboolean
meillo@222 690 smtp_out_init(smtp_base * psb, gboolean instant_helo)
meillo@0 691 {
meillo@10 692 gboolean ok;
meillo@0 693
meillo@222 694 logwrite(LOG_INFO, "smtp_out_init(): instant_helo:%d\n", instant_helo);
meillo@10 695
meillo@246 696 if (!instant_helo) {
meillo@222 697 if ((ok = read_response(psb, SMTP_INITIAL_TIMEOUT))) {
meillo@246 698 ok = check_response(psb, FALSE);
meillo@222 699 }
meillo@222 700 if (!ok) {
meillo@222 701 smtp_out_log_failure(psb, NULL);
meillo@222 702 return ok;
meillo@222 703 }
meillo@222 704 }
meillo@222 705
meillo@222 706 if ((ok = smtp_helo(psb, psb->helo_name))) {
meillo@0 707 #ifdef ENABLE_AUTH
meillo@222 708 if (psb->auth_name && psb->use_auth) {
meillo@222 709 /* we completely disregard the response of server here. If
meillo@222 710 authentication fails, the server will complain later
meillo@222 711 anyway. I know, this is not polite... */
meillo@222 712 smtp_out_auth(psb);
meillo@222 713 }
meillo@10 714 #endif
meillo@0 715 }
meillo@10 716 if (!ok)
meillo@10 717 smtp_out_log_failure(psb, NULL);
meillo@10 718 return ok;
meillo@0 719 }
meillo@0 720
meillo@10 721 gint
meillo@10 722 smtp_out_msg(smtp_base * psb, message * msg, address * return_path, GList * rcpt_list, GList * hdr_list)
meillo@0 723 {
meillo@10 724 gint i, size;
meillo@10 725 gboolean ok = TRUE;
meillo@10 726 int rcpt_cnt;
meillo@10 727 int rcpt_accept = 0;
meillo@0 728
meillo@10 729 DEBUG(5) debugf("smtp_out_msg entered\n");
meillo@0 730
meillo@10 731 /* defaults: */
meillo@10 732 if (return_path == NULL)
meillo@10 733 return_path = msg->return_path;
meillo@10 734 if (hdr_list == NULL)
meillo@10 735 hdr_list = msg->hdr_list;
meillo@10 736 if (rcpt_list == NULL)
meillo@10 737 rcpt_list = msg->rcpt_list;
meillo@10 738 rcpt_cnt = g_list_length(rcpt_list);
meillo@0 739
meillo@10 740 size = msg_calc_size(msg, TRUE);
meillo@0 741
meillo@10 742 /* respect maximum size given by server: */
meillo@10 743 if ((psb->max_size > 0) && (size > psb->max_size)) {
meillo@114 744 logwrite(LOG_WARNING, "%s == host=%s message size (%d) > "
meillo@114 745 "fixed maximum message size of server (%d)",
meillo@10 746 msg->uid, psb->remote_host, size, psb->max_size);
meillo@10 747 psb->error = smtp_cancel;
meillo@10 748 ok = FALSE;
meillo@10 749 }
meillo@0 750
meillo@10 751 if (ok) {
meillo@119 752 /* pretend the message is a bit larger,
meillo@119 753 just in case the size calculation is buggy */
meillo@119 754 smtp_cmd_mailfrom(psb, return_path, psb->use_size ? size+SMTP_SIZE_ADD : 0);
meillo@0 755
meillo@10 756 if (!psb->use_pipelining) {
meillo@10 757 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 758 ok = check_response(psb, FALSE);
meillo@10 759 }
meillo@10 760 }
meillo@10 761 if (ok) {
meillo@10 762 GList *rcpt_node;
meillo@10 763 rcpt_accept = 0;
meillo@0 764
meillo@10 765 for (rcpt_node = g_list_first(rcpt_list); rcpt_node != NULL; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 766 address *rcpt = (address *) (rcpt_node->data);
meillo@10 767 smtp_cmd_rcptto(psb, rcpt);
meillo@10 768 if (!psb->use_pipelining) {
meillo@10 769 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 770 if (check_response(psb, FALSE)) {
meillo@10 771 rcpt_accept++;
meillo@10 772 addr_mark_delivered(rcpt);
meillo@10 773 } else {
meillo@10 774 /* if server returned an error for one recp. we
meillo@10 775 may still try the others. But if it is a timeout, eof
meillo@10 776 or unexpected response, it is more serious and we should
meillo@10 777 give up. */
meillo@10 778 if ((psb->error != smtp_trylater) && (psb->error != smtp_fail)) {
meillo@10 779 ok = FALSE;
meillo@10 780 break;
meillo@10 781 } else {
meillo@114 782 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n",
meillo@15 783 msg->uid, addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 784 if (psb->error == smtp_trylater) {
meillo@10 785 addr_mark_defered(rcpt);
meillo@10 786 } else {
meillo@10 787 addr_mark_failed(rcpt);
meillo@10 788 }
meillo@10 789 }
meillo@10 790 } else
meillo@10 791 break;
meillo@10 792 }
meillo@10 793 }
meillo@0 794
meillo@10 795 /* There is no point in going on if no recp.s were accpted.
meillo@10 796 But we can check that at this point only if not pipelining: */
meillo@10 797 ok = (ok && (psb->use_pipelining || (rcpt_accept > 0)));
meillo@10 798 if (ok) {
meillo@0 799
meillo@10 800 fprintf(psb->out, "DATA\r\n");
meillo@10 801 fflush(psb->out);
meillo@0 802
meillo@177 803 DEBUG(4) debugf("C: DATA\r\n");
meillo@10 804
meillo@10 805 if (psb->use_pipelining) {
meillo@10 806 /* the first pl'ed command was MAIL FROM
meillo@10 807 the last was DATA, whose response can be handled by the 'normal' code
meillo@10 808 all in between were RCPT TO:
meillo@10 809 */
meillo@10 810 /* response to MAIL FROM: */
meillo@10 811 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 812 if ((ok = check_response(psb, FALSE))) {
meillo@10 813
meillo@10 814 /* response(s) to RCPT TO:
meillo@10 815 this is very similar to the sequence above for no pipeline
meillo@10 816 */
meillo@10 817 for (i = 0; i < rcpt_cnt; i++) {
meillo@10 818 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 819 address *rcpt = g_list_nth_data(rcpt_list, i);
meillo@10 820 if (check_response(psb, FALSE)) {
meillo@10 821 rcpt_accept++;
meillo@10 822 addr_mark_delivered(rcpt);
meillo@10 823 } else {
meillo@10 824 /* if server returned an error 4xx or 5xx for one recp. we
meillo@10 825 may still try the others. But if it is a timeout, eof
meillo@10 826 or unexpected response, it is more serious and we
meillo@10 827 should give up. */
meillo@10 828 if ((psb->error != smtp_trylater) &&
meillo@10 829 (psb->error != smtp_fail)) {
meillo@10 830 ok = FALSE;
meillo@10 831 break;
meillo@10 832 } else {
meillo@114 833 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n", msg->uid,
meillo@10 834 addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 835 if (psb->error == smtp_trylater) {
meillo@10 836 addr_mark_defered(rcpt);
meillo@10 837 } else {
meillo@10 838 addr_mark_failed(rcpt);
meillo@10 839 }
meillo@10 840 }
meillo@10 841 }
meillo@10 842 } else {
meillo@10 843 DEBUG(5) debugf("check_response failed after RCPT TO\n");
meillo@10 844 break;
meillo@10 845 }
meillo@10 846 }
meillo@10 847 if (rcpt_accept == 0)
meillo@10 848 ok = FALSE;
meillo@10 849 } else {
meillo@10 850 DEBUG(5) debugf("check_response failed after MAIL FROM\n");
meillo@10 851 }
meillo@10 852 } else {
meillo@10 853 DEBUG(5)
meillo@10 854 debugf("read_response failed after MAIL FROM\n");
meillo@10 855 }
meillo@10 856 }
meillo@10 857
meillo@10 858 /* if(psb->use_pipelining) */
meillo@10 859 /* response to the DATA cmd */
meillo@10 860 if (ok) {
meillo@10 861 if (read_response(psb, SMTP_DATA_TIMEOUT)) {
meillo@10 862 if (check_response(psb, TRUE)) {
meillo@10 863 send_header(psb, hdr_list);
meillo@10 864 send_data(psb, msg);
meillo@10 865
meillo@10 866 if (read_response(psb, SMTP_FINAL_TIMEOUT))
meillo@10 867 ok = check_response(psb, FALSE);
meillo@10 868 }
meillo@10 869 }
meillo@10 870 }
meillo@0 871 }
meillo@10 872 }
meillo@10 873
meillo@10 874 DEBUG(5) {
meillo@114 875 debugf("smtp_out_msg():\n");
meillo@114 876 debugf(" psb->error = %d\n", psb->error);
meillo@114 877 debugf(" ok = %d\n", ok);
meillo@114 878 debugf(" rcpt_accept = %d\n", rcpt_accept);
meillo@10 879 }
meillo@10 880
meillo@10 881 if (psb->error == smtp_ok) {
meillo@10 882 GList *rcpt_node;
meillo@10 883 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 884 address *rcpt = (address *) (rcpt_node->data);
meillo@10 885 if (addr_is_delivered(rcpt))
meillo@246 886 logwrite(LOG_NOTICE, "%s => %s host=%s\n",
meillo@246 887 msg->uid, addr_string(rcpt), psb->remote_host);
meillo@0 888 }
meillo@10 889 } else {
meillo@10 890 /* if something went wrong,
meillo@10 891 we have to unmark the rcpts prematurely marked as delivered
meillo@10 892 and mark the status */
meillo@10 893 smtp_out_mark_rcpts(psb, rcpt_list);
meillo@10 894
meillo@10 895 /* log the failure: */
meillo@10 896 smtp_out_log_failure(psb, msg);
meillo@0 897 }
meillo@10 898 return rcpt_accept;
meillo@0 899 }
meillo@0 900
meillo@10 901 gboolean
meillo@10 902 smtp_out_quit(smtp_base * psb)
meillo@0 903 {
meillo@10 904 fprintf(psb->out, "QUIT\r\n");
meillo@10 905 fflush(psb->out);
meillo@0 906
meillo@177 907 DEBUG(4) debugf("C: QUIT\n");
meillo@0 908
meillo@10 909 signal(SIGALRM, SIG_DFL);
meillo@10 910
meillo@10 911 return TRUE;
meillo@0 912 }
meillo@10 913
meillo@10 914 gint
meillo@10 915 smtp_deliver(gchar * host, gint port, GList * resolve_list, message * msg, address * return_path, GList * rcpt_list)
meillo@0 916 {
meillo@10 917 smtp_base *psb;
meillo@10 918 smtp_error err;
meillo@0 919
meillo@10 920 DEBUG(5) debugf("smtp_deliver entered\n");
meillo@0 921
meillo@10 922 if (return_path == NULL)
meillo@10 923 return_path = msg->return_path;
meillo@0 924
meillo@10 925 if ((psb = smtp_out_open(host, port, resolve_list))) {
meillo@10 926 set_heloname(psb, return_path->domain, TRUE);
meillo@10 927 /* initiate connection, send message and quit: */
meillo@222 928 if (smtp_out_init(psb, FALSE)) {
meillo@10 929 smtp_out_msg(psb, msg, return_path, rcpt_list, NULL);
meillo@10 930 if (psb->error == smtp_ok || (psb->error == smtp_fail) || (psb->error == smtp_trylater)
meillo@10 931 || (psb->error == smtp_syntax) || (psb->error == smtp_cancel))
meillo@10 932 smtp_out_quit(psb);
meillo@10 933 }
meillo@10 934
meillo@10 935 err = psb->error;
meillo@10 936 destroy_smtpbase(psb);
meillo@10 937
meillo@10 938 return err;
meillo@10 939 }
meillo@10 940 return -1;
meillo@0 941 }