masqmail

annotate src/smtp_out.c @ 321:412385b57dc4

find changesets by author, revision, files, or words in the commit message
refactoring
author meillo@marmaro.de
date Thu, 28 Apr 2011 16:48:23 +0200
parents c74adb7c4f50
children 02bc0331e390
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@321 516 smtp_out_open_child(gchar * cmd, char* host)
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@321 522 psb->remote_host = host;
meillo@10 523 sock = child(cmd);
meillo@10 524 if (sock > 0) {
meillo@10 525 psb = create_smtpbase(sock);
meillo@10 526 psb->remote_host = NULL;
meillo@0 527
meillo@10 528 return psb;
meillo@10 529 }
meillo@0 530
meillo@10 531 return NULL;
meillo@0 532 }
meillo@0 533
meillo@10 534 gboolean
meillo@10 535 smtp_out_rset(smtp_base * psb)
meillo@0 536 {
meillo@10 537 gboolean ok;
meillo@0 538
meillo@10 539 fprintf(psb->out, "RSET\r\n");
meillo@10 540 fflush(psb->out);
meillo@177 541 DEBUG(4) debugf("C: RSET\n");
meillo@0 542
meillo@10 543 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 544 if (check_response(psb, FALSE))
meillo@10 545 return TRUE;
meillo@0 546
meillo@10 547 smtp_out_log_failure(psb, NULL);
meillo@10 548
meillo@10 549 return FALSE;
meillo@0 550 }
meillo@0 551
meillo@0 552 #ifdef ENABLE_AUTH
meillo@0 553
meillo@10 554 static gboolean
meillo@10 555 smtp_out_auth_cram_md5(smtp_base * psb)
meillo@0 556 {
meillo@10 557 gboolean ok = FALSE;
meillo@0 558
meillo@177 559 fprintf(psb->out, "C: AUTH CRAM-MD5\r\n");
meillo@10 560 fflush(psb->out);
meillo@10 561 DEBUG(4) debugf("AUTH CRAM-MD5\n");
meillo@10 562 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 563 if ((ok = check_response(psb, TRUE))) {
meillo@10 564 gchar *chall64 = get_response_arg(&(psb->buffer[4]));
meillo@10 565 gint chall_size;
meillo@10 566 gchar *chall = base64_decode(chall64, &chall_size);
meillo@10 567 guchar digest[16], *reply64, *reply;
meillo@10 568 gchar digest_string[33];
meillo@10 569 gint i;
meillo@0 570 #ifdef USE_LIB_CRYPTO
meillo@10 571 unsigned int digest_len;
meillo@0 572 #endif
meillo@10 573
meillo@114 574 DEBUG(5) debugf("smtp_out_auth_cram_md5():\n");
meillo@114 575 DEBUG(5) debugf(" encoded challenge = %s\n", chall64);
meillo@114 576 DEBUG(5) debugf(" decoded challenge = %s, size = %d\n", chall, chall_size);
meillo@114 577 DEBUG(5) debugf(" secret = %s\n", psb->auth_secret);
meillo@10 578
meillo@0 579 #ifdef USE_LIB_CRYPTO
meillo@10 580 HMAC(EVP_md5(), psb->auth_secret, strlen(psb->auth_secret), chall, chall_size, digest, &digest_len);
meillo@0 581 #else
meillo@10 582 hmac_md5(chall, chall_size, psb->auth_secret, strlen(psb->auth_secret), digest);
meillo@0 583 #endif
meillo@10 584
meillo@10 585 for (i = 0; i < 16; i++)
meillo@10 586 sprintf(&(digest_string[i + i]), "%02x", (unsigned int) (digest[i]));
meillo@15 587 digest_string[32] = '\0';
meillo@10 588
meillo@114 589 DEBUG(5) debugf(" digest = %s\n", digest_string);
meillo@10 590
meillo@10 591 reply = g_strdup_printf("%s %s", psb->auth_login, digest_string);
meillo@114 592 DEBUG(5) debugf(" unencoded reply = %s\n", reply);
meillo@10 593
meillo@10 594 reply64 = base64_encode(reply, strlen(reply));
meillo@114 595 DEBUG(5) debugf(" encoded reply = %s\n", reply64);
meillo@10 596
meillo@10 597 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 598 fflush(psb->out);
meillo@177 599 DEBUG(6) debugf(" reply64 = %s\n", reply64);
meillo@177 600 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 601
meillo@10 602 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 603 ok = check_response(psb, FALSE);
meillo@10 604
meillo@10 605 g_free(reply64);
meillo@10 606 g_free(reply);
meillo@10 607 g_free(chall);
meillo@10 608 g_free(chall64);
meillo@10 609 }
meillo@10 610 }
meillo@10 611 return ok;
meillo@0 612 }
meillo@0 613
meillo@10 614 static gboolean
meillo@10 615 smtp_out_auth_login(smtp_base * psb)
meillo@0 616 {
meillo@10 617 gboolean ok = FALSE;
meillo@10 618 fprintf(psb->out, "AUTH LOGIN\r\n");
meillo@10 619 fflush(psb->out);
meillo@177 620 DEBUG(4) debugf("C: AUTH LOGIN\r\n");
meillo@10 621 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 622 if ((ok = check_response(psb, TRUE))) {
meillo@10 623 gchar *resp64;
meillo@10 624 guchar *resp;
meillo@10 625 gint resp_size;
meillo@10 626 gchar *reply64;
meillo@10 627
meillo@114 628 DEBUG(5) debugf("smtp_out_auth_login():\n");
meillo@10 629 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@312 630 DEBUG(5) debugf(" encoded response = `%s'\n", resp64);
meillo@10 631 resp = base64_decode(resp64, &resp_size);
meillo@10 632 g_free(resp64);
meillo@312 633 DEBUG(5) debugf(" decoded response = `%s', size = %d\n", resp, resp_size);
meillo@10 634 g_free(resp);
meillo@10 635 reply64 = base64_encode(psb->auth_login, strlen(psb->auth_login));
meillo@10 636 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 637 fflush(psb->out);
meillo@177 638 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 639 g_free(reply64);
meillo@10 640 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 641 if ((ok = check_response(psb, TRUE))) {
meillo@10 642 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@312 643 DEBUG(5) debugf(" encoded response = `%s'\n", resp64);
meillo@10 644 resp = base64_decode(resp64, &resp_size);
meillo@10 645 g_free(resp64);
meillo@312 646 DEBUG(5) debugf(" decoded response = `%s', size = %d\n", resp, resp_size);
meillo@10 647 g_free(resp);
meillo@10 648 reply64 = base64_encode(psb->auth_secret, strlen(psb->auth_secret));
meillo@10 649 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 650 fflush(psb->out);
meillo@177 651 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 652 g_free(reply64);
meillo@10 653 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 654 ok = check_response(psb, FALSE);
meillo@10 655 }
meillo@10 656 }
meillo@10 657 }
meillo@0 658 }
meillo@10 659 return ok;
meillo@0 660 }
meillo@0 661
meillo@10 662 gboolean
meillo@10 663 smtp_out_auth(smtp_base * psb)
meillo@0 664 {
meillo@10 665 gboolean ok = FALSE;
meillo@10 666 gint i = 0;
meillo@10 667 while (psb->auth_names[i]) {
meillo@10 668 if (strcasecmp(psb->auth_names[i], psb->auth_name) == 0)
meillo@10 669 break;
meillo@10 670 i++;
meillo@10 671 }
meillo@10 672 if (psb->auth_names[i]) {
meillo@10 673 if (strcasecmp(psb->auth_name, "cram-md5") == 0) {
meillo@10 674 smtp_out_auth_cram_md5(psb);
meillo@10 675 } else if (strcasecmp(psb->auth_name, "login") == 0) {
meillo@10 676 smtp_out_auth_login(psb);
meillo@10 677 } else {
meillo@10 678 logwrite(LOG_ERR, "auth method %s not supported\n", psb->auth_name);
meillo@10 679 }
meillo@10 680 } else {
meillo@10 681 logwrite(LOG_ERR, "no auth method %s found.\n", psb->auth_name);
meillo@10 682 }
meillo@10 683 return ok;
meillo@0 684 }
meillo@0 685
meillo@0 686 #endif
meillo@0 687
meillo@10 688 gboolean
meillo@222 689 smtp_out_init(smtp_base * psb, gboolean instant_helo)
meillo@0 690 {
meillo@10 691 gboolean ok;
meillo@0 692
meillo@222 693 logwrite(LOG_INFO, "smtp_out_init(): instant_helo:%d\n", instant_helo);
meillo@10 694
meillo@246 695 if (!instant_helo) {
meillo@222 696 if ((ok = read_response(psb, SMTP_INITIAL_TIMEOUT))) {
meillo@246 697 ok = check_response(psb, FALSE);
meillo@222 698 }
meillo@222 699 if (!ok) {
meillo@222 700 smtp_out_log_failure(psb, NULL);
meillo@222 701 return ok;
meillo@222 702 }
meillo@222 703 }
meillo@222 704
meillo@222 705 if ((ok = smtp_helo(psb, psb->helo_name))) {
meillo@0 706 #ifdef ENABLE_AUTH
meillo@222 707 if (psb->auth_name && psb->use_auth) {
meillo@222 708 /* we completely disregard the response of server here. If
meillo@222 709 authentication fails, the server will complain later
meillo@222 710 anyway. I know, this is not polite... */
meillo@222 711 smtp_out_auth(psb);
meillo@222 712 }
meillo@10 713 #endif
meillo@0 714 }
meillo@10 715 if (!ok)
meillo@10 716 smtp_out_log_failure(psb, NULL);
meillo@10 717 return ok;
meillo@0 718 }
meillo@0 719
meillo@10 720 gint
meillo@10 721 smtp_out_msg(smtp_base * psb, message * msg, address * return_path, GList * rcpt_list, GList * hdr_list)
meillo@0 722 {
meillo@10 723 gint i, size;
meillo@10 724 gboolean ok = TRUE;
meillo@10 725 int rcpt_cnt;
meillo@10 726 int rcpt_accept = 0;
meillo@0 727
meillo@10 728 DEBUG(5) debugf("smtp_out_msg entered\n");
meillo@0 729
meillo@10 730 /* defaults: */
meillo@10 731 if (return_path == NULL)
meillo@10 732 return_path = msg->return_path;
meillo@10 733 if (hdr_list == NULL)
meillo@10 734 hdr_list = msg->hdr_list;
meillo@10 735 if (rcpt_list == NULL)
meillo@10 736 rcpt_list = msg->rcpt_list;
meillo@10 737 rcpt_cnt = g_list_length(rcpt_list);
meillo@0 738
meillo@10 739 size = msg_calc_size(msg, TRUE);
meillo@0 740
meillo@10 741 /* respect maximum size given by server: */
meillo@10 742 if ((psb->max_size > 0) && (size > psb->max_size)) {
meillo@114 743 logwrite(LOG_WARNING, "%s == host=%s message size (%d) > "
meillo@114 744 "fixed maximum message size of server (%d)",
meillo@10 745 msg->uid, psb->remote_host, size, psb->max_size);
meillo@10 746 psb->error = smtp_cancel;
meillo@10 747 ok = FALSE;
meillo@10 748 }
meillo@0 749
meillo@10 750 if (ok) {
meillo@119 751 /* pretend the message is a bit larger,
meillo@119 752 just in case the size calculation is buggy */
meillo@119 753 smtp_cmd_mailfrom(psb, return_path, psb->use_size ? size+SMTP_SIZE_ADD : 0);
meillo@0 754
meillo@10 755 if (!psb->use_pipelining) {
meillo@10 756 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 757 ok = check_response(psb, FALSE);
meillo@10 758 }
meillo@10 759 }
meillo@10 760 if (ok) {
meillo@10 761 GList *rcpt_node;
meillo@10 762 rcpt_accept = 0;
meillo@0 763
meillo@10 764 for (rcpt_node = g_list_first(rcpt_list); rcpt_node != NULL; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 765 address *rcpt = (address *) (rcpt_node->data);
meillo@10 766 smtp_cmd_rcptto(psb, rcpt);
meillo@10 767 if (!psb->use_pipelining) {
meillo@10 768 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 769 if (check_response(psb, FALSE)) {
meillo@10 770 rcpt_accept++;
meillo@10 771 addr_mark_delivered(rcpt);
meillo@10 772 } else {
meillo@10 773 /* if server returned an error for one recp. we
meillo@10 774 may still try the others. But if it is a timeout, eof
meillo@10 775 or unexpected response, it is more serious and we should
meillo@10 776 give up. */
meillo@10 777 if ((psb->error != smtp_trylater) && (psb->error != smtp_fail)) {
meillo@10 778 ok = FALSE;
meillo@10 779 break;
meillo@10 780 } else {
meillo@114 781 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n",
meillo@15 782 msg->uid, addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 783 if (psb->error == smtp_trylater) {
meillo@10 784 addr_mark_defered(rcpt);
meillo@10 785 } else {
meillo@10 786 addr_mark_failed(rcpt);
meillo@10 787 }
meillo@10 788 }
meillo@10 789 } else
meillo@10 790 break;
meillo@10 791 }
meillo@10 792 }
meillo@0 793
meillo@10 794 /* There is no point in going on if no recp.s were accpted.
meillo@10 795 But we can check that at this point only if not pipelining: */
meillo@10 796 ok = (ok && (psb->use_pipelining || (rcpt_accept > 0)));
meillo@10 797 if (ok) {
meillo@0 798
meillo@10 799 fprintf(psb->out, "DATA\r\n");
meillo@10 800 fflush(psb->out);
meillo@0 801
meillo@177 802 DEBUG(4) debugf("C: DATA\r\n");
meillo@10 803
meillo@10 804 if (psb->use_pipelining) {
meillo@10 805 /* the first pl'ed command was MAIL FROM
meillo@10 806 the last was DATA, whose response can be handled by the 'normal' code
meillo@10 807 all in between were RCPT TO:
meillo@10 808 */
meillo@10 809 /* response to MAIL FROM: */
meillo@10 810 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 811 if ((ok = check_response(psb, FALSE))) {
meillo@10 812
meillo@10 813 /* response(s) to RCPT TO:
meillo@10 814 this is very similar to the sequence above for no pipeline
meillo@10 815 */
meillo@10 816 for (i = 0; i < rcpt_cnt; i++) {
meillo@10 817 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 818 address *rcpt = g_list_nth_data(rcpt_list, i);
meillo@10 819 if (check_response(psb, FALSE)) {
meillo@10 820 rcpt_accept++;
meillo@10 821 addr_mark_delivered(rcpt);
meillo@10 822 } else {
meillo@10 823 /* if server returned an error 4xx or 5xx for one recp. we
meillo@10 824 may still try the others. But if it is a timeout, eof
meillo@10 825 or unexpected response, it is more serious and we
meillo@10 826 should give up. */
meillo@10 827 if ((psb->error != smtp_trylater) &&
meillo@10 828 (psb->error != smtp_fail)) {
meillo@10 829 ok = FALSE;
meillo@10 830 break;
meillo@10 831 } else {
meillo@114 832 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n", msg->uid,
meillo@10 833 addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 834 if (psb->error == smtp_trylater) {
meillo@10 835 addr_mark_defered(rcpt);
meillo@10 836 } else {
meillo@10 837 addr_mark_failed(rcpt);
meillo@10 838 }
meillo@10 839 }
meillo@10 840 }
meillo@10 841 } else {
meillo@10 842 DEBUG(5) debugf("check_response failed after RCPT TO\n");
meillo@10 843 break;
meillo@10 844 }
meillo@10 845 }
meillo@10 846 if (rcpt_accept == 0)
meillo@10 847 ok = FALSE;
meillo@10 848 } else {
meillo@10 849 DEBUG(5) debugf("check_response failed after MAIL FROM\n");
meillo@10 850 }
meillo@10 851 } else {
meillo@10 852 DEBUG(5)
meillo@10 853 debugf("read_response failed after MAIL FROM\n");
meillo@10 854 }
meillo@10 855 }
meillo@10 856
meillo@10 857 /* if(psb->use_pipelining) */
meillo@10 858 /* response to the DATA cmd */
meillo@10 859 if (ok) {
meillo@10 860 if (read_response(psb, SMTP_DATA_TIMEOUT)) {
meillo@10 861 if (check_response(psb, TRUE)) {
meillo@10 862 send_header(psb, hdr_list);
meillo@10 863 send_data(psb, msg);
meillo@10 864
meillo@10 865 if (read_response(psb, SMTP_FINAL_TIMEOUT))
meillo@10 866 ok = check_response(psb, FALSE);
meillo@10 867 }
meillo@10 868 }
meillo@10 869 }
meillo@0 870 }
meillo@10 871 }
meillo@10 872
meillo@10 873 DEBUG(5) {
meillo@114 874 debugf("smtp_out_msg():\n");
meillo@114 875 debugf(" psb->error = %d\n", psb->error);
meillo@114 876 debugf(" ok = %d\n", ok);
meillo@114 877 debugf(" rcpt_accept = %d\n", rcpt_accept);
meillo@10 878 }
meillo@10 879
meillo@10 880 if (psb->error == smtp_ok) {
meillo@10 881 GList *rcpt_node;
meillo@10 882 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 883 address *rcpt = (address *) (rcpt_node->data);
meillo@10 884 if (addr_is_delivered(rcpt))
meillo@246 885 logwrite(LOG_NOTICE, "%s => %s host=%s\n",
meillo@246 886 msg->uid, addr_string(rcpt), psb->remote_host);
meillo@0 887 }
meillo@10 888 } else {
meillo@10 889 /* if something went wrong,
meillo@10 890 we have to unmark the rcpts prematurely marked as delivered
meillo@10 891 and mark the status */
meillo@10 892 smtp_out_mark_rcpts(psb, rcpt_list);
meillo@10 893
meillo@10 894 /* log the failure: */
meillo@10 895 smtp_out_log_failure(psb, msg);
meillo@0 896 }
meillo@10 897 return rcpt_accept;
meillo@0 898 }
meillo@0 899
meillo@10 900 gboolean
meillo@10 901 smtp_out_quit(smtp_base * psb)
meillo@0 902 {
meillo@10 903 fprintf(psb->out, "QUIT\r\n");
meillo@10 904 fflush(psb->out);
meillo@0 905
meillo@177 906 DEBUG(4) debugf("C: QUIT\n");
meillo@0 907
meillo@10 908 signal(SIGALRM, SIG_DFL);
meillo@10 909
meillo@10 910 return TRUE;
meillo@0 911 }
meillo@10 912
meillo@10 913 gint
meillo@10 914 smtp_deliver(gchar * host, gint port, GList * resolve_list, message * msg, address * return_path, GList * rcpt_list)
meillo@0 915 {
meillo@10 916 smtp_base *psb;
meillo@10 917 smtp_error err;
meillo@0 918
meillo@10 919 DEBUG(5) debugf("smtp_deliver entered\n");
meillo@0 920
meillo@10 921 if (return_path == NULL)
meillo@10 922 return_path = msg->return_path;
meillo@0 923
meillo@10 924 if ((psb = smtp_out_open(host, port, resolve_list))) {
meillo@10 925 set_heloname(psb, return_path->domain, TRUE);
meillo@10 926 /* initiate connection, send message and quit: */
meillo@222 927 if (smtp_out_init(psb, FALSE)) {
meillo@10 928 smtp_out_msg(psb, msg, return_path, rcpt_list, NULL);
meillo@10 929 if (psb->error == smtp_ok || (psb->error == smtp_fail) || (psb->error == smtp_trylater)
meillo@10 930 || (psb->error == smtp_syntax) || (psb->error == smtp_cancel))
meillo@10 931 smtp_out_quit(psb);
meillo@10 932 }
meillo@10 933
meillo@10 934 err = psb->error;
meillo@10 935 destroy_smtpbase(psb);
meillo@10 936
meillo@10 937 return err;
meillo@10 938 }
meillo@10 939 return -1;
meillo@0 940 }