masqmail-0.2

annotate src/smtp_out.c @ 173:a2bec9a14324

find changesets by author, revision, files, or words in the commit message
updated date and version in man pages
author meillo@marmaro.de
date Fri, 23 Jul 2010 10:15:49 +0200
parents 52c82d755215
children 087e99c7702a
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/md5.h"
meillo@0 43 #include "md5/hmac_md5.h"
meillo@0 44 #endif
meillo@0 45
meillo@0 46 #include "base64/base64.h"
meillo@0 47 #endif
meillo@0 48
meillo@10 49 void
meillo@10 50 destroy_smtpbase(smtp_base * psb)
meillo@0 51 {
meillo@10 52 fclose(psb->in);
meillo@10 53 fclose(psb->out);
meillo@0 54
meillo@10 55 close(psb->sock);
meillo@0 56
meillo@10 57 if (psb->helo_name)
meillo@10 58 g_free(psb->helo_name);
meillo@10 59 if (psb->buffer)
meillo@10 60 g_free(psb->buffer);
meillo@10 61 if (psb->auth_names)
meillo@10 62 g_strfreev(psb->auth_names);
meillo@0 63
meillo@10 64 if (psb->auth_name)
meillo@10 65 g_free(psb->auth_name);
meillo@10 66 if (psb->auth_login)
meillo@10 67 g_free(psb->auth_login);
meillo@10 68 if (psb->auth_secret)
meillo@10 69 g_free(psb->auth_secret);
meillo@0 70 }
meillo@0 71
meillo@10 72 gchar*
meillo@10 73 set_heloname(smtp_base * psb, gchar * default_name, gboolean do_correct)
meillo@0 74 {
meillo@10 75 struct sockaddr_in sname;
meillo@10 76 int len = sizeof(struct sockaddr_in);
meillo@10 77 struct hostent *host_entry;
meillo@0 78
meillo@10 79 if (do_correct) {
meillo@10 80 getsockname(psb->sock, (struct sockaddr *) (&sname), &len);
meillo@10 81 DEBUG(5) debugf("socket: name.sin_addr = %s\n", inet_ntoa(sname.sin_addr));
meillo@10 82 host_entry = gethostbyaddr((const char *) &(sname.sin_addr), sizeof(sname.sin_addr), AF_INET);
meillo@10 83 if (host_entry) {
meillo@10 84 psb->helo_name = g_strdup(host_entry->h_name);
meillo@10 85 } else {
meillo@10 86 /* we failed to look up our own name. Instead of giving our local hostname,
meillo@10 87 we may give our IP number to show the server that we are at least
meillo@10 88 willing to be honest. For the really picky ones. */
meillo@10 89 DEBUG(5) debugf("failed to look up own host name.\n");
meillo@10 90 psb->helo_name = g_strdup_printf("[%s]", inet_ntoa(sname.sin_addr));
meillo@10 91 }
meillo@10 92 DEBUG(5) debugf("helo_name = %s\n", psb->helo_name);
meillo@10 93 }
meillo@10 94 if (psb->helo_name == NULL) {
meillo@10 95 psb->helo_name = g_strdup(default_name);
meillo@10 96 }
meillo@10 97 return psb->helo_name;
meillo@10 98 }
meillo@0 99
meillo@0 100 #ifdef ENABLE_AUTH
meillo@0 101
meillo@10 102 gboolean
meillo@10 103 set_auth(smtp_base * psb, gchar * name, gchar * login, gchar * secret)
meillo@0 104 {
meillo@10 105 if ((strcasecmp(name, "CRAM-MD5") == 0) || (strcasecmp(name, "LOGIN") == 0)) {
meillo@10 106 psb->auth_name = g_strdup(name);
meillo@10 107 psb->auth_login = g_strdup(login);
meillo@10 108 psb->auth_secret = g_strdup(secret);
meillo@10 109
meillo@10 110 return TRUE;
meillo@10 111 }
meillo@10 112 return FALSE;
meillo@0 113 }
meillo@0 114
meillo@0 115 #endif
meillo@0 116
meillo@10 117 static smtp_base*
meillo@10 118 create_smtpbase(gint sock)
meillo@0 119 {
meillo@10 120 gint dup_sock;
meillo@0 121
meillo@10 122 smtp_base *psb = (smtp_base *) g_malloc(sizeof(smtp_base));
meillo@0 123
meillo@10 124 psb->sock = sock;
meillo@0 125
meillo@10 126 psb->use_esmtp = FALSE;
meillo@10 127 psb->use_size = FALSE;
meillo@10 128 psb->use_pipelining = FALSE;
meillo@10 129 psb->use_auth = FALSE;
meillo@0 130
meillo@10 131 psb->max_size = 0;
meillo@10 132 psb->auth_names = NULL;
meillo@0 133
meillo@10 134 psb->buffer = (gchar *) g_malloc(SMTP_BUF_LEN);
meillo@0 135
meillo@10 136 dup_sock = dup(sock);
meillo@10 137 psb->out = fdopen(sock, "w");
meillo@10 138 psb->in = fdopen(dup_sock, "r");
meillo@0 139
meillo@10 140 psb->error = smtp_ok;
meillo@0 141
meillo@10 142 psb->helo_name = NULL;
meillo@0 143
meillo@10 144 psb->auth_name = psb->auth_login = psb->auth_secret = NULL;
meillo@10 145
meillo@10 146 return psb;
meillo@0 147 }
meillo@0 148
meillo@10 149 static gboolean
meillo@10 150 read_response(smtp_base * psb, int timeout)
meillo@0 151 {
meillo@10 152 gint buf_pos = 0;
meillo@10 153 gchar code[5];
meillo@10 154 gint i, len;
meillo@0 155
meillo@10 156 do {
meillo@10 157 len = read_sockline(psb->in, &(psb->buffer[buf_pos]), SMTP_BUF_LEN - buf_pos, timeout, READSOCKL_CHUG);
meillo@10 158 if (len == -3) {
meillo@10 159 psb->error = smtp_timeout;
meillo@10 160 return FALSE;
meillo@10 161 } else if (len == -2) {
meillo@10 162 psb->error = smtp_syntax;
meillo@10 163 return FALSE;
meillo@10 164 } else if (len == -1) {
meillo@10 165 psb->error = smtp_eof;
meillo@10 166 return FALSE;
meillo@10 167 }
meillo@10 168 for (i = 0; i < 4; i++)
meillo@10 169 code[i] = psb->buffer[buf_pos + i];
meillo@15 170 code[i] = '\0';
meillo@10 171 psb->last_code = atoi(code);
meillo@0 172
meillo@10 173 buf_pos += len;
meillo@0 174
meillo@10 175 } while (code[3] == '-');
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@10 187 DEBUG(6) debugf("response OK:'%s' after_date = %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@10 196 DEBUG(6) debugf("response failure:'%s' after_date = %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 gboolean
meillo@10 202 check_init_response(smtp_base * psb)
meillo@0 203 {
meillo@10 204 if (check_response(psb, FALSE)) {
meillo@10 205 psb->use_esmtp = (strstr(psb->buffer, "ESMTP") != NULL);
meillo@0 206
meillo@10 207 DEBUG(4) debugf(psb->use_esmtp ? "uses esmtp\n" : "no esmtp\n");
meillo@0 208
meillo@10 209 return TRUE;
meillo@10 210 }
meillo@10 211 return FALSE;
meillo@0 212 }
meillo@0 213
meillo@10 214 static gchar*
meillo@10 215 get_response_arg(gchar * response)
meillo@0 216 {
meillo@10 217 gchar buf[SMTP_BUF_LEN];
meillo@10 218 gchar *p = response, *q = buf;
meillo@0 219
meillo@10 220 while (*p && (*p != '\n') && isspace(*p))
meillo@10 221 p++;
meillo@10 222 if (*p && (*p != '\n')) {
meillo@10 223 while (*p && (*p != '\n') && (*p != '\r') && (q < buf + SMTP_BUF_LEN - 1))
meillo@10 224 *(q++) = *(p++);
meillo@15 225 *q = '\0';
meillo@10 226 return g_strdup(buf);
meillo@10 227 }
meillo@10 228 return NULL;
meillo@0 229 }
meillo@0 230
meillo@10 231 static gboolean
meillo@10 232 check_helo_response(smtp_base * psb)
meillo@0 233 {
meillo@171 234 gchar *ptr;
meillo@0 235
meillo@10 236 if (!check_response(psb, FALSE))
meillo@10 237 return FALSE;
meillo@0 238
meillo@171 239 if (psb->last_code == 220) {
meillo@171 240 logwrite(LOG_NOTICE, "received a 220 greeting after sending EHLO,\n");
meillo@171 241 logwrite(LOG_NOTICE, "please remove `instant_helo' from your route config\n");
meillo@171 242 /* read the next response, cause that's the actual helo response */
meillo@171 243 if (!read_response(psb, SMTP_CMD_TIMEOUT) || !check_response(psb, FALSE)) {
meillo@171 244 return FALSE;
meillo@171 245 }
meillo@171 246 }
meillo@171 247
meillo@171 248 ptr = psb->buffer;
meillo@171 249
meillo@10 250 while (*ptr) {
meillo@10 251 if (strncasecmp(&(ptr[4]), "SIZE", 4) == 0) {
meillo@10 252 gchar *arg;
meillo@10 253 psb->use_size = TRUE;
meillo@10 254 arg = get_response_arg(&(ptr[8]));
meillo@10 255 if (arg) {
meillo@10 256 psb->max_size = atoi(arg);
meillo@10 257 g_free(arg);
meillo@10 258 }
meillo@10 259 }
meillo@0 260
meillo@10 261 if (strncasecmp(&(ptr[4]), "PIPELINING", 10) == 0)
meillo@10 262 psb->use_pipelining = TRUE;
meillo@0 263
meillo@10 264 if (strncasecmp(&(ptr[4]), "AUTH", 4) == 0) {
meillo@10 265 if ((ptr[8] == ' ') || (ptr[8] == '=') || (ptr[8] == '\t')) { /* not sure about '\t' */
meillo@10 266 gchar *arg;
meillo@10 267 psb->use_auth = TRUE;
meillo@10 268 arg = get_response_arg(&(ptr[9])); /* after several years I finally learnt to count */
meillo@10 269 if (arg) {
meillo@10 270 psb->auth_names = g_strsplit(arg, " ", 0);
meillo@10 271 g_free(arg);
meillo@10 272
meillo@10 273 DEBUG(4) {
meillo@10 274 gint i = 0;
meillo@114 275 debugf("in check_helo_response()\n");
meillo@10 276 while (psb->auth_names[i]) {
meillo@114 277 debugf(" offered AUTH %s\n", psb->auth_names[i]);
meillo@10 278 i++;
meillo@10 279 }
meillo@10 280 }
meillo@10 281 }
meillo@10 282 }
meillo@10 283 }
meillo@10 284
meillo@10 285 while (*ptr != '\n')
meillo@10 286 ptr++;
meillo@10 287 ptr++;
meillo@0 288 }
meillo@0 289
meillo@10 290 DEBUG(4) {
meillo@114 291 debugf(" %s\n", psb->use_size ? "uses SIZE" : "no size");
meillo@114 292 debugf(" %s\n", psb->use_pipelining ? "uses PIPELINING" : "no pipelining");
meillo@114 293 debugf(" %s\n", psb->use_auth ? "uses AUTH" : "no auth");
meillo@10 294 }
meillo@0 295
meillo@10 296 return TRUE;
meillo@0 297 }
meillo@0 298
meillo@10 299 static gboolean
meillo@10 300 smtp_helo(smtp_base * psb, gchar * helo)
meillo@0 301 {
meillo@10 302 while (TRUE) {
meillo@10 303 if (psb->use_esmtp) {
meillo@10 304 fprintf(psb->out, "EHLO %s\r\n", helo);
meillo@10 305 fflush(psb->out);
meillo@0 306
meillo@10 307 DEBUG(4) debugf("EHLO %s\r\n", helo);
meillo@0 308
meillo@10 309 } else {
meillo@10 310 fprintf(psb->out, "HELO %s\r\n", helo);
meillo@10 311 fflush(psb->out);
meillo@0 312
meillo@10 313 DEBUG(4) debugf("HELO %s\r\n", helo);
meillo@0 314
meillo@10 315 }
meillo@0 316
meillo@10 317 if (!read_response(psb, SMTP_CMD_TIMEOUT))
meillo@10 318 return FALSE;
meillo@10 319
meillo@10 320 if (check_helo_response(psb))
meillo@10 321 return TRUE;
meillo@10 322 else {
meillo@10 323 if (psb->error == smtp_fail) {
meillo@10 324 if (psb->use_esmtp) {
meillo@10 325 /* our guess that server understands EHLO was wrong, try again with HELO */
meillo@10 326 psb->use_esmtp = FALSE;
meillo@10 327 } else {
meillo@10 328 /* what sort of server ist THAT ?! give up... */
meillo@10 329 return FALSE;
meillo@10 330 }
meillo@10 331 } else
meillo@10 332 return FALSE;
meillo@10 333 }
meillo@0 334 }
meillo@0 335 }
meillo@0 336
meillo@10 337 static void
meillo@10 338 smtp_cmd_mailfrom(smtp_base * psb, address * return_path, guint size)
meillo@0 339 {
meillo@10 340 if (psb->use_size) {
meillo@10 341 fprintf(psb->out, "MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@10 342 fflush(psb->out);
meillo@0 343
meillo@10 344 DEBUG(4) debugf("MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@0 345
meillo@10 346 } else {
meillo@10 347 fprintf(psb->out, "MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 348 fflush(psb->out);
meillo@0 349
meillo@10 350 DEBUG(4) debugf("MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 351 }
meillo@0 352 }
meillo@0 353
meillo@10 354 static void
meillo@10 355 smtp_cmd_rcptto(smtp_base * psb, address * rcpt)
meillo@0 356 {
meillo@10 357 fprintf(psb->out, "RCPT TO:%s\r\n", addr_string(rcpt));
meillo@10 358 fflush(psb->out);
meillo@10 359 DEBUG(4) debugf("RCPT TO:%s\n", addr_string(rcpt));
meillo@0 360 }
meillo@0 361
meillo@10 362 static void
meillo@10 363 send_data_line(smtp_base * psb, gchar * data)
meillo@0 364 {
meillo@10 365 /* According to RFC 821 each line should be terminated with CRLF.
meillo@10 366 Since a dot on a line itself marks the end of data, each line
meillo@10 367 beginning with a dot is prepended with another dot.
meillo@10 368 */
meillo@10 369 gchar *ptr;
meillo@15 370 gboolean new_line = TRUE; /* previous versions assumed that each item was exactly one line.
meillo@15 371 This is no longer the case */
meillo@0 372
meillo@10 373 ptr = data;
meillo@10 374 while (*ptr) {
meillo@10 375 int c = (int) (*ptr);
meillo@119 376 if (c == '.' && new_line) {
meillo@119 377 /* dot-stuffing */
meillo@119 378 putc('.', psb->out);
meillo@119 379 }
meillo@10 380 if (c == '\n') {
meillo@119 381 /* CRLF line terminators */
meillo@10 382 putc('\r', psb->out);
meillo@10 383 putc('\n', psb->out);
meillo@10 384 new_line = TRUE;
meillo@10 385 } else {
meillo@10 386 putc(c, psb->out);
meillo@10 387 new_line = FALSE;
meillo@10 388 }
meillo@10 389 ptr++;
meillo@10 390 }
meillo@0 391 }
meillo@0 392
meillo@10 393 static void
meillo@10 394 send_header(smtp_base * psb, GList * hdr_list)
meillo@0 395 {
meillo@10 396 GList *node;
meillo@10 397 gint num_hdrs = 0;
meillo@0 398
meillo@10 399 /* header */
meillo@10 400 if (hdr_list) {
meillo@10 401 foreach(hdr_list, node) {
meillo@10 402 if (node->data) {
meillo@10 403 header *hdr = (header *) (node->data);
meillo@10 404 if (hdr->header) {
meillo@10 405 send_data_line(psb, hdr->header);
meillo@10 406 num_hdrs++;
meillo@10 407 }
meillo@10 408 }
meillo@10 409 }
meillo@0 410 }
meillo@0 411
meillo@10 412 /* empty line separating headers from data: */
meillo@10 413 putc('\r', psb->out);
meillo@10 414 putc('\n', psb->out);
meillo@0 415
meillo@10 416 DEBUG(4) debugf("sent %d headers\n", num_hdrs);
meillo@0 417 }
meillo@0 418
meillo@10 419 static void
meillo@10 420 send_data(smtp_base * psb, message * msg)
meillo@0 421 {
meillo@10 422 GList *node;
meillo@10 423 gint num_lines = 0;
meillo@0 424
meillo@10 425 /* data */
meillo@10 426 if (msg->data_list) {
meillo@10 427 for (node = g_list_first(msg->data_list); node; node = g_list_next(node)) {
meillo@10 428 if (node->data) {
meillo@10 429 send_data_line(psb, node->data);
meillo@10 430 num_lines++;
meillo@10 431 }
meillo@10 432 }
meillo@10 433 }
meillo@0 434
meillo@10 435 DEBUG(4) debugf("sent %d lines of data\n", num_lines);
meillo@0 436
meillo@10 437 fprintf(psb->out, ".\r\n");
meillo@10 438 fflush(psb->out);
meillo@0 439 }
meillo@0 440
meillo@10 441 void
meillo@10 442 smtp_out_mark_rcpts(smtp_base * psb, GList * rcpt_list)
meillo@0 443 {
meillo@10 444 GList *rcpt_node;
meillo@10 445 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 446 address *rcpt = (address *) (rcpt_node->data);
meillo@0 447
meillo@10 448 addr_unmark_delivered(rcpt);
meillo@0 449
meillo@10 450 if ((psb->error == smtp_trylater) || (psb->error == smtp_timeout) || (psb->error == smtp_eof)) {
meillo@10 451 addr_mark_defered(rcpt);
meillo@10 452 } else {
meillo@10 453 addr_mark_failed(rcpt);
meillo@10 454 }
meillo@10 455 }
meillo@0 456 }
meillo@0 457
meillo@10 458 void
meillo@10 459 smtp_out_log_failure(smtp_base * psb, message * msg)
meillo@0 460 {
meillo@10 461 gchar *err_str;
meillo@0 462
meillo@10 463 if (psb->error == smtp_timeout)
meillo@10 464 err_str = g_strdup("connection timed out.");
meillo@10 465 else if (psb->error == smtp_eof)
meillo@10 466 err_str = g_strdup("connection terminated prematurely.");
meillo@10 467 else if (psb->error == smtp_syntax)
meillo@10 468 err_str = g_strdup_printf("got unexpected response: %s", psb->buffer);
meillo@10 469 else if (psb->error == smtp_cancel)
meillo@10 470 err_str = g_strdup("delivery was canceled.\n");
meillo@10 471 else
meillo@10 472 /* error message should still be in the buffer */
meillo@10 473 err_str = g_strdup_printf("failed: %s\n", psb->buffer);
meillo@0 474
meillo@10 475 if (msg == NULL)
meillo@10 476 logwrite(LOG_NOTICE, "host=%s %s\n", psb->remote_host, err_str);
meillo@10 477 else
meillo@10 478 logwrite(LOG_NOTICE, "%s == host=%s %s\n", msg->uid, psb->remote_host, err_str);
meillo@0 479
meillo@10 480 g_free(err_str);
meillo@0 481 }
meillo@0 482
meillo@10 483 smtp_base*
meillo@10 484 smtp_out_open(gchar * host, gint port, GList * resolve_list)
meillo@0 485 {
meillo@10 486 smtp_base *psb;
meillo@10 487 gint sock;
meillo@10 488 mxip_addr *addr;
meillo@0 489
meillo@10 490 DEBUG(5) debugf("smtp_out_open entered, host = %s\n", host);
meillo@0 491
meillo@10 492 if ((addr = connect_resolvelist(&sock, host, port, resolve_list))) {
meillo@10 493 /* create structure to hold status data: */
meillo@10 494 psb = create_smtpbase(sock);
meillo@10 495 psb->remote_host = addr->name;
meillo@0 496
meillo@10 497 DEBUG(5) {
meillo@10 498 struct sockaddr_in name;
meillo@10 499 int len = sizeof(struct sockaddr);
meillo@10 500 getsockname(sock, (struct sockaddr *) (&name), &len);
meillo@10 501 debugf("socket: name.sin_addr = %s\n", inet_ntoa(name.sin_addr));
meillo@10 502 }
meillo@10 503 return psb;
meillo@10 504 } else {
meillo@10 505 DEBUG(5) debugf("connect_resolvelist failed: %s %s\n", strerror(errno), hstrerror(h_errno));
meillo@10 506 }
meillo@0 507
meillo@10 508 return NULL;
meillo@0 509 }
meillo@0 510
meillo@10 511 smtp_base*
meillo@10 512 smtp_out_open_child(gchar * cmd)
meillo@0 513 {
meillo@10 514 smtp_base *psb;
meillo@10 515 gint sock;
meillo@0 516
meillo@10 517 DEBUG(5) debugf("smtp_out_open_child entered, cmd = %s\n", cmd);
meillo@0 518
meillo@10 519 sock = child(cmd);
meillo@0 520
meillo@10 521 if (sock > 0) {
meillo@10 522 psb = create_smtpbase(sock);
meillo@10 523 psb->remote_host = NULL;
meillo@0 524
meillo@10 525 return psb;
meillo@10 526 }
meillo@0 527
meillo@10 528 return NULL;
meillo@0 529 }
meillo@0 530
meillo@10 531 gboolean
meillo@10 532 smtp_out_rset(smtp_base * psb)
meillo@0 533 {
meillo@10 534 gboolean ok;
meillo@0 535
meillo@10 536 fprintf(psb->out, "RSET\r\n");
meillo@10 537 fflush(psb->out);
meillo@10 538 DEBUG(4) debugf("RSET\n");
meillo@0 539
meillo@10 540 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 541 if (check_response(psb, FALSE))
meillo@10 542 return TRUE;
meillo@0 543
meillo@10 544 smtp_out_log_failure(psb, NULL);
meillo@10 545
meillo@10 546 return FALSE;
meillo@0 547 }
meillo@0 548
meillo@0 549 #ifdef ENABLE_AUTH
meillo@0 550
meillo@10 551 static gboolean
meillo@10 552 smtp_out_auth_cram_md5(smtp_base * psb)
meillo@0 553 {
meillo@10 554 gboolean ok = FALSE;
meillo@0 555
meillo@10 556 fprintf(psb->out, "AUTH CRAM-MD5\r\n");
meillo@10 557 fflush(psb->out);
meillo@10 558 DEBUG(4) debugf("AUTH CRAM-MD5\n");
meillo@10 559 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 560 if ((ok = check_response(psb, TRUE))) {
meillo@10 561 gchar *chall64 = get_response_arg(&(psb->buffer[4]));
meillo@10 562 gint chall_size;
meillo@10 563 gchar *chall = base64_decode(chall64, &chall_size);
meillo@10 564 guchar digest[16], *reply64, *reply;
meillo@10 565 gchar digest_string[33];
meillo@10 566 gint i;
meillo@0 567 #ifdef USE_LIB_CRYPTO
meillo@10 568 unsigned int digest_len;
meillo@0 569 #endif
meillo@10 570
meillo@114 571 DEBUG(5) debugf("smtp_out_auth_cram_md5():\n");
meillo@114 572 DEBUG(5) debugf(" encoded challenge = %s\n", chall64);
meillo@114 573 DEBUG(5) debugf(" decoded challenge = %s, size = %d\n", chall, chall_size);
meillo@114 574 DEBUG(5) debugf(" secret = %s\n", psb->auth_secret);
meillo@10 575
meillo@0 576 #ifdef USE_LIB_CRYPTO
meillo@10 577 HMAC(EVP_md5(), psb->auth_secret, strlen(psb->auth_secret), chall, chall_size, digest, &digest_len);
meillo@0 578 #else
meillo@10 579 hmac_md5(chall, chall_size, psb->auth_secret, strlen(psb->auth_secret), digest);
meillo@0 580 #endif
meillo@10 581
meillo@10 582 for (i = 0; i < 16; i++)
meillo@10 583 sprintf(&(digest_string[i + i]), "%02x", (unsigned int) (digest[i]));
meillo@15 584 digest_string[32] = '\0';
meillo@10 585
meillo@114 586 DEBUG(5) debugf(" digest = %s\n", digest_string);
meillo@10 587
meillo@10 588 reply = g_strdup_printf("%s %s", psb->auth_login, digest_string);
meillo@114 589 DEBUG(5) debugf(" unencoded reply = %s\n", reply);
meillo@10 590
meillo@10 591 reply64 = base64_encode(reply, strlen(reply));
meillo@114 592 DEBUG(5) debugf(" encoded reply = %s\n", reply64);
meillo@10 593
meillo@10 594 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 595 fflush(psb->out);
meillo@114 596 DEBUG(4) debugf(" reply64 = %s\n", reply64);
meillo@10 597
meillo@10 598 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 599 ok = check_response(psb, FALSE);
meillo@10 600
meillo@10 601 g_free(reply64);
meillo@10 602 g_free(reply);
meillo@10 603 g_free(chall);
meillo@10 604 g_free(chall64);
meillo@10 605 }
meillo@10 606 }
meillo@10 607 return ok;
meillo@0 608 }
meillo@0 609
meillo@10 610 static gboolean
meillo@10 611 smtp_out_auth_login(smtp_base * psb)
meillo@0 612 {
meillo@10 613 gboolean ok = FALSE;
meillo@10 614 fprintf(psb->out, "AUTH LOGIN\r\n");
meillo@10 615 fflush(psb->out);
meillo@10 616 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 617 if ((ok = check_response(psb, TRUE))) {
meillo@10 618 gchar *resp64;
meillo@10 619 guchar *resp;
meillo@10 620 gint resp_size;
meillo@10 621 gchar *reply64;
meillo@10 622
meillo@114 623 DEBUG(5) debugf("smtp_out_auth_login():\n");
meillo@10 624 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 625 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 626 resp = base64_decode(resp64, &resp_size);
meillo@10 627 g_free(resp64);
meillo@114 628 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 629 g_free(resp);
meillo@10 630 reply64 = base64_encode(psb->auth_login, strlen(psb->auth_login));
meillo@10 631 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 632 fflush(psb->out);
meillo@10 633 g_free(reply64);
meillo@10 634 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 635 if ((ok = check_response(psb, TRUE))) {
meillo@10 636 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 637 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 638 resp = base64_decode(resp64, &resp_size);
meillo@10 639 g_free(resp64);
meillo@114 640 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 641 g_free(resp);
meillo@10 642 reply64 = base64_encode(psb->auth_secret, strlen(psb->auth_secret));
meillo@10 643 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 644 fflush(psb->out);
meillo@10 645 g_free(reply64);
meillo@10 646 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 647 ok = check_response(psb, FALSE);
meillo@10 648 }
meillo@10 649 }
meillo@10 650 }
meillo@0 651 }
meillo@10 652 return ok;
meillo@0 653 }
meillo@0 654
meillo@10 655 gboolean
meillo@10 656 smtp_out_auth(smtp_base * psb)
meillo@0 657 {
meillo@10 658 gboolean ok = FALSE;
meillo@10 659 gint i = 0;
meillo@10 660 while (psb->auth_names[i]) {
meillo@10 661 if (strcasecmp(psb->auth_names[i], psb->auth_name) == 0)
meillo@10 662 break;
meillo@10 663 i++;
meillo@10 664 }
meillo@10 665 if (psb->auth_names[i]) {
meillo@10 666 if (strcasecmp(psb->auth_name, "cram-md5") == 0) {
meillo@10 667 smtp_out_auth_cram_md5(psb);
meillo@10 668 } else if (strcasecmp(psb->auth_name, "login") == 0) {
meillo@10 669 smtp_out_auth_login(psb);
meillo@10 670 } else {
meillo@10 671 logwrite(LOG_ERR, "auth method %s not supported\n", psb->auth_name);
meillo@10 672 }
meillo@10 673 } else {
meillo@10 674 logwrite(LOG_ERR, "no auth method %s found.\n", psb->auth_name);
meillo@10 675 }
meillo@10 676 return ok;
meillo@0 677 }
meillo@0 678
meillo@0 679 #endif
meillo@0 680
meillo@10 681 gboolean
meillo@171 682 smtp_out_init(smtp_base * psb, gboolean instant_helo)
meillo@0 683 {
meillo@10 684 gboolean ok;
meillo@0 685
meillo@171 686 logwrite(LOG_INFO, "smtp_out_init(): instant_helo:%d\n", instant_helo);
meillo@10 687
meillo@171 688 if (instant_helo) {
meillo@171 689 /* we say hello right away, hence we don't know if
meillo@171 690 ESMTP is supported; we just assume it */
meillo@171 691 psb->use_esmtp = 1;
meillo@171 692 } else {
meillo@171 693 if ((ok = read_response(psb, SMTP_INITIAL_TIMEOUT))) {
meillo@171 694 ok = check_init_response(psb);
meillo@171 695 }
meillo@171 696 if (!ok) {
meillo@171 697 smtp_out_log_failure(psb, NULL);
meillo@171 698 return ok;
meillo@171 699 }
meillo@171 700 }
meillo@171 701
meillo@171 702 if ((ok = smtp_helo(psb, psb->helo_name))) {
meillo@0 703 #ifdef ENABLE_AUTH
meillo@171 704 if (psb->auth_name && psb->use_auth) {
meillo@171 705 /* we completely disregard the response of server here. If
meillo@171 706 authentication fails, the server will complain later
meillo@171 707 anyway. I know, this is not polite... */
meillo@171 708 smtp_out_auth(psb);
meillo@171 709 }
meillo@10 710 #endif
meillo@0 711 }
meillo@10 712 if (!ok)
meillo@10 713 smtp_out_log_failure(psb, NULL);
meillo@10 714 return ok;
meillo@0 715 }
meillo@0 716
meillo@10 717 gint
meillo@10 718 smtp_out_msg(smtp_base * psb, message * msg, address * return_path, GList * rcpt_list, GList * hdr_list)
meillo@0 719 {
meillo@10 720 gint i, size;
meillo@10 721 gboolean ok = TRUE;
meillo@10 722 int rcpt_cnt;
meillo@10 723 int rcpt_accept = 0;
meillo@0 724
meillo@10 725 DEBUG(5) debugf("smtp_out_msg entered\n");
meillo@0 726
meillo@10 727 /* defaults: */
meillo@10 728 if (return_path == NULL)
meillo@10 729 return_path = msg->return_path;
meillo@10 730 if (hdr_list == NULL)
meillo@10 731 hdr_list = msg->hdr_list;
meillo@10 732 if (rcpt_list == NULL)
meillo@10 733 rcpt_list = msg->rcpt_list;
meillo@10 734 rcpt_cnt = g_list_length(rcpt_list);
meillo@0 735
meillo@10 736 size = msg_calc_size(msg, TRUE);
meillo@0 737
meillo@10 738 /* respect maximum size given by server: */
meillo@10 739 if ((psb->max_size > 0) && (size > psb->max_size)) {
meillo@114 740 logwrite(LOG_WARNING, "%s == host=%s message size (%d) > "
meillo@114 741 "fixed maximum message size of server (%d)",
meillo@10 742 msg->uid, psb->remote_host, size, psb->max_size);
meillo@10 743 psb->error = smtp_cancel;
meillo@10 744 ok = FALSE;
meillo@10 745 }
meillo@0 746
meillo@10 747 if (ok) {
meillo@119 748 /* pretend the message is a bit larger,
meillo@119 749 just in case the size calculation is buggy */
meillo@119 750 smtp_cmd_mailfrom(psb, return_path, psb->use_size ? size+SMTP_SIZE_ADD : 0);
meillo@0 751
meillo@10 752 if (!psb->use_pipelining) {
meillo@10 753 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 754 ok = check_response(psb, FALSE);
meillo@10 755 }
meillo@10 756 }
meillo@10 757 if (ok) {
meillo@10 758 GList *rcpt_node;
meillo@10 759 rcpt_accept = 0;
meillo@0 760
meillo@10 761 for (rcpt_node = g_list_first(rcpt_list); rcpt_node != NULL; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 762 address *rcpt = (address *) (rcpt_node->data);
meillo@10 763 smtp_cmd_rcptto(psb, rcpt);
meillo@10 764 if (!psb->use_pipelining) {
meillo@10 765 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 766 if (check_response(psb, FALSE)) {
meillo@10 767 rcpt_accept++;
meillo@10 768 addr_mark_delivered(rcpt);
meillo@10 769 } else {
meillo@10 770 /* if server returned an error for one recp. we
meillo@10 771 may still try the others. But if it is a timeout, eof
meillo@10 772 or unexpected response, it is more serious and we should
meillo@10 773 give up. */
meillo@10 774 if ((psb->error != smtp_trylater) && (psb->error != smtp_fail)) {
meillo@10 775 ok = FALSE;
meillo@10 776 break;
meillo@10 777 } else {
meillo@114 778 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n",
meillo@15 779 msg->uid, addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 780 if (psb->error == smtp_trylater) {
meillo@10 781 addr_mark_defered(rcpt);
meillo@10 782 } else {
meillo@10 783 addr_mark_failed(rcpt);
meillo@10 784 }
meillo@10 785 }
meillo@10 786 } else
meillo@10 787 break;
meillo@10 788 }
meillo@10 789 }
meillo@0 790
meillo@10 791 /* There is no point in going on if no recp.s were accpted.
meillo@10 792 But we can check that at this point only if not pipelining: */
meillo@10 793 ok = (ok && (psb->use_pipelining || (rcpt_accept > 0)));
meillo@10 794 if (ok) {
meillo@0 795
meillo@10 796 fprintf(psb->out, "DATA\r\n");
meillo@10 797 fflush(psb->out);
meillo@0 798
meillo@10 799 DEBUG(4) debugf("DATA\r\n");
meillo@10 800
meillo@10 801 if (psb->use_pipelining) {
meillo@10 802 /* the first pl'ed command was MAIL FROM
meillo@10 803 the last was DATA, whose response can be handled by the 'normal' code
meillo@10 804 all in between were RCPT TO:
meillo@10 805 */
meillo@10 806 /* response to MAIL FROM: */
meillo@10 807 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 808 if ((ok = check_response(psb, FALSE))) {
meillo@10 809
meillo@10 810 /* response(s) to RCPT TO:
meillo@10 811 this is very similar to the sequence above for no pipeline
meillo@10 812 */
meillo@10 813 for (i = 0; i < rcpt_cnt; i++) {
meillo@10 814 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 815 address *rcpt = g_list_nth_data(rcpt_list, i);
meillo@10 816 if (check_response(psb, FALSE)) {
meillo@10 817 rcpt_accept++;
meillo@10 818 addr_mark_delivered(rcpt);
meillo@10 819 } else {
meillo@10 820 /* if server returned an error 4xx or 5xx for one recp. we
meillo@10 821 may still try the others. But if it is a timeout, eof
meillo@10 822 or unexpected response, it is more serious and we
meillo@10 823 should give up. */
meillo@10 824 if ((psb->error != smtp_trylater) &&
meillo@10 825 (psb->error != smtp_fail)) {
meillo@10 826 ok = FALSE;
meillo@10 827 break;
meillo@10 828 } else {
meillo@114 829 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n", msg->uid,
meillo@10 830 addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 831 if (psb->error == smtp_trylater) {
meillo@10 832 addr_mark_defered(rcpt);
meillo@10 833 } else {
meillo@10 834 addr_mark_failed(rcpt);
meillo@10 835 }
meillo@10 836 }
meillo@10 837 }
meillo@10 838 } else {
meillo@10 839 DEBUG(5) debugf("check_response failed after RCPT TO\n");
meillo@10 840 break;
meillo@10 841 }
meillo@10 842 }
meillo@10 843 if (rcpt_accept == 0)
meillo@10 844 ok = FALSE;
meillo@10 845 } else {
meillo@10 846 DEBUG(5) debugf("check_response failed after MAIL FROM\n");
meillo@10 847 }
meillo@10 848 } else {
meillo@10 849 DEBUG(5)
meillo@10 850 debugf("read_response failed after MAIL FROM\n");
meillo@10 851 }
meillo@10 852 }
meillo@10 853
meillo@10 854 /* if(psb->use_pipelining) */
meillo@10 855 /* response to the DATA cmd */
meillo@10 856 if (ok) {
meillo@10 857 if (read_response(psb, SMTP_DATA_TIMEOUT)) {
meillo@10 858 if (check_response(psb, TRUE)) {
meillo@10 859 send_header(psb, hdr_list);
meillo@10 860 send_data(psb, msg);
meillo@10 861
meillo@10 862 if (read_response(psb, SMTP_FINAL_TIMEOUT))
meillo@10 863 ok = check_response(psb, FALSE);
meillo@10 864 }
meillo@10 865 }
meillo@10 866 }
meillo@0 867 }
meillo@10 868 }
meillo@10 869
meillo@10 870 DEBUG(5) {
meillo@114 871 debugf("smtp_out_msg():\n");
meillo@114 872 debugf(" psb->error = %d\n", psb->error);
meillo@114 873 debugf(" ok = %d\n", ok);
meillo@114 874 debugf(" rcpt_accept = %d\n", rcpt_accept);
meillo@10 875 }
meillo@10 876
meillo@10 877 if (psb->error == smtp_ok) {
meillo@10 878 GList *rcpt_node;
meillo@10 879 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 880 address *rcpt = (address *) (rcpt_node->data);
meillo@10 881 if (addr_is_delivered(rcpt))
meillo@10 882 logwrite(LOG_NOTICE, "%s => %s host=%s with %s\n", msg->uid, addr_string(rcpt),
meillo@10 883 psb->remote_host, psb->use_esmtp ? "esmtp" : "smtp");
meillo@0 884 }
meillo@10 885 } else {
meillo@10 886 /* if something went wrong,
meillo@10 887 we have to unmark the rcpts prematurely marked as delivered
meillo@10 888 and mark the status */
meillo@10 889 smtp_out_mark_rcpts(psb, rcpt_list);
meillo@10 890
meillo@10 891 /* log the failure: */
meillo@10 892 smtp_out_log_failure(psb, msg);
meillo@0 893 }
meillo@10 894 return rcpt_accept;
meillo@0 895 }
meillo@0 896
meillo@10 897 gboolean
meillo@10 898 smtp_out_quit(smtp_base * psb)
meillo@0 899 {
meillo@10 900 fprintf(psb->out, "QUIT\r\n");
meillo@10 901 fflush(psb->out);
meillo@0 902
meillo@10 903 DEBUG(4) debugf("QUIT\n");
meillo@0 904
meillo@10 905 signal(SIGALRM, SIG_DFL);
meillo@10 906
meillo@10 907 return TRUE;
meillo@0 908 }
meillo@10 909
meillo@10 910 gint
meillo@10 911 smtp_deliver(gchar * host, gint port, GList * resolve_list, message * msg, address * return_path, GList * rcpt_list)
meillo@0 912 {
meillo@10 913 smtp_base *psb;
meillo@10 914 smtp_error err;
meillo@0 915
meillo@10 916 DEBUG(5) debugf("smtp_deliver entered\n");
meillo@0 917
meillo@10 918 if (return_path == NULL)
meillo@10 919 return_path = msg->return_path;
meillo@0 920
meillo@10 921 if ((psb = smtp_out_open(host, port, resolve_list))) {
meillo@10 922 set_heloname(psb, return_path->domain, TRUE);
meillo@10 923 /* initiate connection, send message and quit: */
meillo@171 924 if (smtp_out_init(psb, FALSE)) {
meillo@10 925 smtp_out_msg(psb, msg, return_path, rcpt_list, NULL);
meillo@10 926 if (psb->error == smtp_ok || (psb->error == smtp_fail) || (psb->error == smtp_trylater)
meillo@10 927 || (psb->error == smtp_syntax) || (psb->error == smtp_cancel))
meillo@10 928 smtp_out_quit(psb);
meillo@10 929 }
meillo@10 930
meillo@10 931 err = psb->error;
meillo@10 932 destroy_smtpbase(psb);
meillo@10 933
meillo@10 934 return err;
meillo@10 935 }
meillo@10 936 return -1;
meillo@0 937 }