masqmail

annotate src/smtp_out.c @ 215:08b32edca1d5

find changesets by author, revision, files, or words in the commit message
added the contents of the old FAQ page it surely needs an update
author meillo@marmaro.de
date Mon, 19 Jul 2010 14:10:14 +0200
parents 6530806d418f
children 8cddc65765bd
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@177 176 if (psb->buffer) {
meillo@177 177 DEBUG(4) debugf("S: %s\n", psb->buffer);
meillo@177 178 }
meillo@0 179
meillo@10 180 return TRUE;
meillo@0 181 }
meillo@0 182
meillo@10 183 static gboolean
meillo@10 184 check_response(smtp_base * psb, gboolean after_data)
meillo@0 185 {
meillo@10 186 char c = psb->buffer[0];
meillo@0 187
meillo@10 188 if (((c == '2') && !after_data) || ((c == '3') && after_data)) {
meillo@10 189 psb->error = smtp_ok;
meillo@176 190 DEBUG(6) debugf("response OK:'%s' after_data = %d\n", psb->buffer, (int) after_data);
meillo@10 191 return TRUE;
meillo@10 192 } else {
meillo@10 193 if (c == '4')
meillo@10 194 psb->error = smtp_trylater;
meillo@10 195 else if (c == '5')
meillo@10 196 psb->error = smtp_fail;
meillo@10 197 else
meillo@10 198 psb->error = smtp_syntax;
meillo@176 199 DEBUG(6) debugf("response failure:'%s' after_data = %d\n", psb->buffer, (int) after_data);
meillo@10 200 return FALSE;
meillo@10 201 }
meillo@0 202 }
meillo@0 203
meillo@10 204 static gboolean
meillo@10 205 check_init_response(smtp_base * psb)
meillo@0 206 {
meillo@10 207 if (check_response(psb, FALSE)) {
meillo@10 208 psb->use_esmtp = (strstr(psb->buffer, "ESMTP") != NULL);
meillo@0 209
meillo@10 210 DEBUG(4) debugf(psb->use_esmtp ? "uses esmtp\n" : "no esmtp\n");
meillo@0 211
meillo@10 212 return TRUE;
meillo@10 213 }
meillo@10 214 return FALSE;
meillo@0 215 }
meillo@0 216
meillo@10 217 static gchar*
meillo@10 218 get_response_arg(gchar * response)
meillo@0 219 {
meillo@10 220 gchar buf[SMTP_BUF_LEN];
meillo@10 221 gchar *p = response, *q = buf;
meillo@0 222
meillo@10 223 while (*p && (*p != '\n') && isspace(*p))
meillo@10 224 p++;
meillo@10 225 if (*p && (*p != '\n')) {
meillo@10 226 while (*p && (*p != '\n') && (*p != '\r') && (q < buf + SMTP_BUF_LEN - 1))
meillo@10 227 *(q++) = *(p++);
meillo@15 228 *q = '\0';
meillo@10 229 return g_strdup(buf);
meillo@10 230 }
meillo@10 231 return NULL;
meillo@0 232 }
meillo@0 233
meillo@10 234 static gboolean
meillo@10 235 check_helo_response(smtp_base * psb)
meillo@0 236 {
meillo@10 237 gchar *ptr = psb->buffer;
meillo@0 238
meillo@10 239 if (!check_response(psb, FALSE))
meillo@10 240 return FALSE;
meillo@0 241
meillo@10 242 while (*ptr) {
meillo@10 243 if (strncasecmp(&(ptr[4]), "SIZE", 4) == 0) {
meillo@10 244 gchar *arg;
meillo@10 245 psb->use_size = TRUE;
meillo@10 246 arg = get_response_arg(&(ptr[8]));
meillo@10 247 if (arg) {
meillo@10 248 psb->max_size = atoi(arg);
meillo@10 249 g_free(arg);
meillo@10 250 }
meillo@10 251 }
meillo@0 252
meillo@10 253 if (strncasecmp(&(ptr[4]), "PIPELINING", 10) == 0)
meillo@10 254 psb->use_pipelining = TRUE;
meillo@0 255
meillo@10 256 if (strncasecmp(&(ptr[4]), "AUTH", 4) == 0) {
meillo@10 257 if ((ptr[8] == ' ') || (ptr[8] == '=') || (ptr[8] == '\t')) { /* not sure about '\t' */
meillo@10 258 gchar *arg;
meillo@10 259 psb->use_auth = TRUE;
meillo@10 260 arg = get_response_arg(&(ptr[9])); /* after several years I finally learnt to count */
meillo@10 261 if (arg) {
meillo@10 262 psb->auth_names = g_strsplit(arg, " ", 0);
meillo@10 263 g_free(arg);
meillo@10 264
meillo@10 265 DEBUG(4) {
meillo@10 266 gint i = 0;
meillo@114 267 debugf("in check_helo_response()\n");
meillo@10 268 while (psb->auth_names[i]) {
meillo@114 269 debugf(" offered AUTH %s\n", psb->auth_names[i]);
meillo@10 270 i++;
meillo@10 271 }
meillo@10 272 }
meillo@10 273 }
meillo@10 274 }
meillo@10 275 }
meillo@10 276
meillo@10 277 while (*ptr != '\n')
meillo@10 278 ptr++;
meillo@10 279 ptr++;
meillo@0 280 }
meillo@0 281
meillo@10 282 DEBUG(4) {
meillo@114 283 debugf(" %s\n", psb->use_size ? "uses SIZE" : "no size");
meillo@114 284 debugf(" %s\n", psb->use_pipelining ? "uses PIPELINING" : "no pipelining");
meillo@114 285 debugf(" %s\n", psb->use_auth ? "uses AUTH" : "no auth");
meillo@10 286 }
meillo@0 287
meillo@10 288 return TRUE;
meillo@0 289 }
meillo@0 290
meillo@10 291 static gboolean
meillo@10 292 smtp_helo(smtp_base * psb, gchar * helo)
meillo@0 293 {
meillo@10 294 while (TRUE) {
meillo@10 295 if (psb->use_esmtp) {
meillo@10 296 fprintf(psb->out, "EHLO %s\r\n", helo);
meillo@10 297 fflush(psb->out);
meillo@0 298
meillo@177 299 DEBUG(4) debugf("C: EHLO %s\r\n", helo);
meillo@0 300
meillo@10 301 } else {
meillo@10 302 fprintf(psb->out, "HELO %s\r\n", helo);
meillo@10 303 fflush(psb->out);
meillo@0 304
meillo@177 305 DEBUG(4) debugf("C: HELO %s\r\n", helo);
meillo@0 306
meillo@10 307 }
meillo@0 308
meillo@10 309 if (!read_response(psb, SMTP_CMD_TIMEOUT))
meillo@10 310 return FALSE;
meillo@10 311
meillo@10 312 if (check_helo_response(psb))
meillo@10 313 return TRUE;
meillo@10 314 else {
meillo@10 315 if (psb->error == smtp_fail) {
meillo@10 316 if (psb->use_esmtp) {
meillo@10 317 /* our guess that server understands EHLO was wrong, try again with HELO */
meillo@10 318 psb->use_esmtp = FALSE;
meillo@10 319 } else {
meillo@10 320 /* what sort of server ist THAT ?! give up... */
meillo@10 321 return FALSE;
meillo@10 322 }
meillo@10 323 } else
meillo@10 324 return FALSE;
meillo@10 325 }
meillo@0 326 }
meillo@0 327 }
meillo@0 328
meillo@10 329 static void
meillo@10 330 smtp_cmd_mailfrom(smtp_base * psb, address * return_path, guint size)
meillo@0 331 {
meillo@10 332 if (psb->use_size) {
meillo@10 333 fprintf(psb->out, "MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@10 334 fflush(psb->out);
meillo@0 335
meillo@177 336 DEBUG(4) debugf("C: MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@0 337
meillo@10 338 } else {
meillo@10 339 fprintf(psb->out, "MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 340 fflush(psb->out);
meillo@0 341
meillo@177 342 DEBUG(4) debugf("C: MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 343 }
meillo@0 344 }
meillo@0 345
meillo@10 346 static void
meillo@10 347 smtp_cmd_rcptto(smtp_base * psb, address * rcpt)
meillo@0 348 {
meillo@10 349 fprintf(psb->out, "RCPT TO:%s\r\n", addr_string(rcpt));
meillo@10 350 fflush(psb->out);
meillo@177 351 DEBUG(4) debugf("C: RCPT TO:%s\n", addr_string(rcpt));
meillo@0 352 }
meillo@0 353
meillo@10 354 static void
meillo@10 355 send_data_line(smtp_base * psb, gchar * data)
meillo@0 356 {
meillo@10 357 /* According to RFC 821 each line should be terminated with CRLF.
meillo@10 358 Since a dot on a line itself marks the end of data, each line
meillo@10 359 beginning with a dot is prepended with another dot.
meillo@10 360 */
meillo@10 361 gchar *ptr;
meillo@15 362 gboolean new_line = TRUE; /* previous versions assumed that each item was exactly one line.
meillo@15 363 This is no longer the case */
meillo@0 364
meillo@10 365 ptr = data;
meillo@10 366 while (*ptr) {
meillo@10 367 int c = (int) (*ptr);
meillo@119 368 if (c == '.' && new_line) {
meillo@119 369 /* dot-stuffing */
meillo@119 370 putc('.', psb->out);
meillo@119 371 }
meillo@10 372 if (c == '\n') {
meillo@119 373 /* CRLF line terminators */
meillo@10 374 putc('\r', psb->out);
meillo@10 375 putc('\n', psb->out);
meillo@10 376 new_line = TRUE;
meillo@10 377 } else {
meillo@10 378 putc(c, psb->out);
meillo@10 379 new_line = FALSE;
meillo@10 380 }
meillo@10 381 ptr++;
meillo@10 382 }
meillo@0 383 }
meillo@0 384
meillo@10 385 static void
meillo@10 386 send_header(smtp_base * psb, GList * hdr_list)
meillo@0 387 {
meillo@10 388 GList *node;
meillo@10 389 gint num_hdrs = 0;
meillo@0 390
meillo@10 391 /* header */
meillo@10 392 if (hdr_list) {
meillo@10 393 foreach(hdr_list, node) {
meillo@10 394 if (node->data) {
meillo@10 395 header *hdr = (header *) (node->data);
meillo@10 396 if (hdr->header) {
meillo@10 397 send_data_line(psb, hdr->header);
meillo@10 398 num_hdrs++;
meillo@10 399 }
meillo@10 400 }
meillo@10 401 }
meillo@0 402 }
meillo@0 403
meillo@10 404 /* empty line separating headers from data: */
meillo@10 405 putc('\r', psb->out);
meillo@10 406 putc('\n', psb->out);
meillo@0 407
meillo@10 408 DEBUG(4) debugf("sent %d headers\n", num_hdrs);
meillo@0 409 }
meillo@0 410
meillo@10 411 static void
meillo@10 412 send_data(smtp_base * psb, message * msg)
meillo@0 413 {
meillo@10 414 GList *node;
meillo@10 415 gint num_lines = 0;
meillo@0 416
meillo@10 417 /* data */
meillo@10 418 if (msg->data_list) {
meillo@10 419 for (node = g_list_first(msg->data_list); node; node = g_list_next(node)) {
meillo@10 420 if (node->data) {
meillo@10 421 send_data_line(psb, node->data);
meillo@10 422 num_lines++;
meillo@10 423 }
meillo@10 424 }
meillo@10 425 }
meillo@0 426
meillo@10 427 DEBUG(4) debugf("sent %d lines of data\n", num_lines);
meillo@0 428
meillo@10 429 fprintf(psb->out, ".\r\n");
meillo@10 430 fflush(psb->out);
meillo@177 431 DEBUG(4) debugf("C: .\n");
meillo@0 432 }
meillo@0 433
meillo@10 434 void
meillo@10 435 smtp_out_mark_rcpts(smtp_base * psb, GList * rcpt_list)
meillo@0 436 {
meillo@10 437 GList *rcpt_node;
meillo@10 438 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 439 address *rcpt = (address *) (rcpt_node->data);
meillo@0 440
meillo@10 441 addr_unmark_delivered(rcpt);
meillo@0 442
meillo@10 443 if ((psb->error == smtp_trylater) || (psb->error == smtp_timeout) || (psb->error == smtp_eof)) {
meillo@10 444 addr_mark_defered(rcpt);
meillo@10 445 } else {
meillo@10 446 addr_mark_failed(rcpt);
meillo@10 447 }
meillo@10 448 }
meillo@0 449 }
meillo@0 450
meillo@10 451 void
meillo@10 452 smtp_out_log_failure(smtp_base * psb, message * msg)
meillo@0 453 {
meillo@10 454 gchar *err_str;
meillo@0 455
meillo@10 456 if (psb->error == smtp_timeout)
meillo@10 457 err_str = g_strdup("connection timed out.");
meillo@10 458 else if (psb->error == smtp_eof)
meillo@10 459 err_str = g_strdup("connection terminated prematurely.");
meillo@10 460 else if (psb->error == smtp_syntax)
meillo@10 461 err_str = g_strdup_printf("got unexpected response: %s", psb->buffer);
meillo@10 462 else if (psb->error == smtp_cancel)
meillo@10 463 err_str = g_strdup("delivery was canceled.\n");
meillo@10 464 else
meillo@10 465 /* error message should still be in the buffer */
meillo@10 466 err_str = g_strdup_printf("failed: %s\n", psb->buffer);
meillo@0 467
meillo@10 468 if (msg == NULL)
meillo@10 469 logwrite(LOG_NOTICE, "host=%s %s\n", psb->remote_host, err_str);
meillo@10 470 else
meillo@10 471 logwrite(LOG_NOTICE, "%s == host=%s %s\n", msg->uid, psb->remote_host, err_str);
meillo@0 472
meillo@10 473 g_free(err_str);
meillo@0 474 }
meillo@0 475
meillo@10 476 smtp_base*
meillo@10 477 smtp_out_open(gchar * host, gint port, GList * resolve_list)
meillo@0 478 {
meillo@10 479 smtp_base *psb;
meillo@10 480 gint sock;
meillo@10 481 mxip_addr *addr;
meillo@0 482
meillo@10 483 DEBUG(5) debugf("smtp_out_open entered, host = %s\n", host);
meillo@0 484
meillo@10 485 if ((addr = connect_resolvelist(&sock, host, port, resolve_list))) {
meillo@10 486 /* create structure to hold status data: */
meillo@10 487 psb = create_smtpbase(sock);
meillo@10 488 psb->remote_host = addr->name;
meillo@0 489
meillo@10 490 DEBUG(5) {
meillo@10 491 struct sockaddr_in name;
meillo@10 492 int len = sizeof(struct sockaddr);
meillo@10 493 getsockname(sock, (struct sockaddr *) (&name), &len);
meillo@10 494 debugf("socket: name.sin_addr = %s\n", inet_ntoa(name.sin_addr));
meillo@10 495 }
meillo@10 496 return psb;
meillo@10 497 } else {
meillo@10 498 DEBUG(5) debugf("connect_resolvelist failed: %s %s\n", strerror(errno), hstrerror(h_errno));
meillo@10 499 }
meillo@0 500
meillo@10 501 return NULL;
meillo@0 502 }
meillo@0 503
meillo@10 504 smtp_base*
meillo@10 505 smtp_out_open_child(gchar * cmd)
meillo@0 506 {
meillo@10 507 smtp_base *psb;
meillo@10 508 gint sock;
meillo@0 509
meillo@10 510 DEBUG(5) debugf("smtp_out_open_child entered, cmd = %s\n", cmd);
meillo@0 511
meillo@10 512 sock = child(cmd);
meillo@0 513
meillo@10 514 if (sock > 0) {
meillo@10 515 psb = create_smtpbase(sock);
meillo@10 516 psb->remote_host = NULL;
meillo@0 517
meillo@10 518 return psb;
meillo@10 519 }
meillo@0 520
meillo@10 521 return NULL;
meillo@0 522 }
meillo@0 523
meillo@10 524 gboolean
meillo@10 525 smtp_out_rset(smtp_base * psb)
meillo@0 526 {
meillo@10 527 gboolean ok;
meillo@0 528
meillo@10 529 fprintf(psb->out, "RSET\r\n");
meillo@10 530 fflush(psb->out);
meillo@177 531 DEBUG(4) debugf("C: RSET\n");
meillo@0 532
meillo@10 533 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 534 if (check_response(psb, FALSE))
meillo@10 535 return TRUE;
meillo@0 536
meillo@10 537 smtp_out_log_failure(psb, NULL);
meillo@10 538
meillo@10 539 return FALSE;
meillo@0 540 }
meillo@0 541
meillo@0 542 #ifdef ENABLE_AUTH
meillo@0 543
meillo@10 544 static gboolean
meillo@10 545 smtp_out_auth_cram_md5(smtp_base * psb)
meillo@0 546 {
meillo@10 547 gboolean ok = FALSE;
meillo@0 548
meillo@177 549 fprintf(psb->out, "C: AUTH CRAM-MD5\r\n");
meillo@10 550 fflush(psb->out);
meillo@10 551 DEBUG(4) debugf("AUTH CRAM-MD5\n");
meillo@10 552 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 553 if ((ok = check_response(psb, TRUE))) {
meillo@10 554 gchar *chall64 = get_response_arg(&(psb->buffer[4]));
meillo@10 555 gint chall_size;
meillo@10 556 gchar *chall = base64_decode(chall64, &chall_size);
meillo@10 557 guchar digest[16], *reply64, *reply;
meillo@10 558 gchar digest_string[33];
meillo@10 559 gint i;
meillo@0 560 #ifdef USE_LIB_CRYPTO
meillo@10 561 unsigned int digest_len;
meillo@0 562 #endif
meillo@10 563
meillo@114 564 DEBUG(5) debugf("smtp_out_auth_cram_md5():\n");
meillo@114 565 DEBUG(5) debugf(" encoded challenge = %s\n", chall64);
meillo@114 566 DEBUG(5) debugf(" decoded challenge = %s, size = %d\n", chall, chall_size);
meillo@114 567 DEBUG(5) debugf(" secret = %s\n", psb->auth_secret);
meillo@10 568
meillo@0 569 #ifdef USE_LIB_CRYPTO
meillo@10 570 HMAC(EVP_md5(), psb->auth_secret, strlen(psb->auth_secret), chall, chall_size, digest, &digest_len);
meillo@0 571 #else
meillo@10 572 hmac_md5(chall, chall_size, psb->auth_secret, strlen(psb->auth_secret), digest);
meillo@0 573 #endif
meillo@10 574
meillo@10 575 for (i = 0; i < 16; i++)
meillo@10 576 sprintf(&(digest_string[i + i]), "%02x", (unsigned int) (digest[i]));
meillo@15 577 digest_string[32] = '\0';
meillo@10 578
meillo@114 579 DEBUG(5) debugf(" digest = %s\n", digest_string);
meillo@10 580
meillo@10 581 reply = g_strdup_printf("%s %s", psb->auth_login, digest_string);
meillo@114 582 DEBUG(5) debugf(" unencoded reply = %s\n", reply);
meillo@10 583
meillo@10 584 reply64 = base64_encode(reply, strlen(reply));
meillo@114 585 DEBUG(5) debugf(" encoded reply = %s\n", reply64);
meillo@10 586
meillo@10 587 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 588 fflush(psb->out);
meillo@177 589 DEBUG(6) debugf(" reply64 = %s\n", reply64);
meillo@177 590 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 591
meillo@10 592 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 593 ok = check_response(psb, FALSE);
meillo@10 594
meillo@10 595 g_free(reply64);
meillo@10 596 g_free(reply);
meillo@10 597 g_free(chall);
meillo@10 598 g_free(chall64);
meillo@10 599 }
meillo@10 600 }
meillo@10 601 return ok;
meillo@0 602 }
meillo@0 603
meillo@10 604 static gboolean
meillo@10 605 smtp_out_auth_login(smtp_base * psb)
meillo@0 606 {
meillo@10 607 gboolean ok = FALSE;
meillo@10 608 fprintf(psb->out, "AUTH LOGIN\r\n");
meillo@10 609 fflush(psb->out);
meillo@177 610 DEBUG(4) debugf("C: AUTH LOGIN\r\n");
meillo@10 611 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 612 if ((ok = check_response(psb, TRUE))) {
meillo@10 613 gchar *resp64;
meillo@10 614 guchar *resp;
meillo@10 615 gint resp_size;
meillo@10 616 gchar *reply64;
meillo@10 617
meillo@114 618 DEBUG(5) debugf("smtp_out_auth_login():\n");
meillo@10 619 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 620 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 621 resp = base64_decode(resp64, &resp_size);
meillo@10 622 g_free(resp64);
meillo@114 623 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 624 g_free(resp);
meillo@10 625 reply64 = base64_encode(psb->auth_login, strlen(psb->auth_login));
meillo@10 626 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 627 fflush(psb->out);
meillo@177 628 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 629 g_free(reply64);
meillo@10 630 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 631 if ((ok = check_response(psb, TRUE))) {
meillo@10 632 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@114 633 DEBUG(5) debugf(" encoded response = %s\n", resp64);
meillo@10 634 resp = base64_decode(resp64, &resp_size);
meillo@10 635 g_free(resp64);
meillo@114 636 DEBUG(5) debugf(" decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 637 g_free(resp);
meillo@10 638 reply64 = base64_encode(psb->auth_secret, strlen(psb->auth_secret));
meillo@10 639 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 640 fflush(psb->out);
meillo@177 641 DEBUG(6) debugf("C: %s\n", reply64);
meillo@10 642 g_free(reply64);
meillo@10 643 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 644 ok = check_response(psb, FALSE);
meillo@10 645 }
meillo@10 646 }
meillo@10 647 }
meillo@0 648 }
meillo@10 649 return ok;
meillo@0 650 }
meillo@0 651
meillo@10 652 gboolean
meillo@10 653 smtp_out_auth(smtp_base * psb)
meillo@0 654 {
meillo@10 655 gboolean ok = FALSE;
meillo@10 656 gint i = 0;
meillo@10 657 while (psb->auth_names[i]) {
meillo@10 658 if (strcasecmp(psb->auth_names[i], psb->auth_name) == 0)
meillo@10 659 break;
meillo@10 660 i++;
meillo@10 661 }
meillo@10 662 if (psb->auth_names[i]) {
meillo@10 663 if (strcasecmp(psb->auth_name, "cram-md5") == 0) {
meillo@10 664 smtp_out_auth_cram_md5(psb);
meillo@10 665 } else if (strcasecmp(psb->auth_name, "login") == 0) {
meillo@10 666 smtp_out_auth_login(psb);
meillo@10 667 } else {
meillo@10 668 logwrite(LOG_ERR, "auth method %s not supported\n", psb->auth_name);
meillo@10 669 }
meillo@10 670 } else {
meillo@10 671 logwrite(LOG_ERR, "no auth method %s found.\n", psb->auth_name);
meillo@10 672 }
meillo@10 673 return ok;
meillo@0 674 }
meillo@0 675
meillo@0 676 #endif
meillo@0 677
meillo@10 678 gboolean
meillo@10 679 smtp_out_init(smtp_base * psb)
meillo@0 680 {
meillo@10 681 gboolean ok;
meillo@0 682
meillo@10 683 if ((ok = read_response(psb, SMTP_INITIAL_TIMEOUT))) {
meillo@10 684 if ((ok = check_init_response(psb))) {
meillo@10 685
meillo@10 686 if ((ok = smtp_helo(psb, psb->helo_name))) {
meillo@0 687 #ifdef ENABLE_AUTH
meillo@10 688 if (psb->auth_name && psb->use_auth) {
meillo@10 689 /* we completely disregard the response of server here. If
meillo@10 690 authentication fails, the server will complain later
meillo@10 691 anyway. I know, this is not polite... */
meillo@10 692 smtp_out_auth(psb);
meillo@10 693 }
meillo@10 694 #endif
meillo@10 695 }
meillo@10 696 }
meillo@0 697 }
meillo@10 698 if (!ok)
meillo@10 699 smtp_out_log_failure(psb, NULL);
meillo@10 700 return ok;
meillo@0 701 }
meillo@0 702
meillo@10 703 gint
meillo@10 704 smtp_out_msg(smtp_base * psb, message * msg, address * return_path, GList * rcpt_list, GList * hdr_list)
meillo@0 705 {
meillo@10 706 gint i, size;
meillo@10 707 gboolean ok = TRUE;
meillo@10 708 int rcpt_cnt;
meillo@10 709 int rcpt_accept = 0;
meillo@0 710
meillo@10 711 DEBUG(5) debugf("smtp_out_msg entered\n");
meillo@0 712
meillo@10 713 /* defaults: */
meillo@10 714 if (return_path == NULL)
meillo@10 715 return_path = msg->return_path;
meillo@10 716 if (hdr_list == NULL)
meillo@10 717 hdr_list = msg->hdr_list;
meillo@10 718 if (rcpt_list == NULL)
meillo@10 719 rcpt_list = msg->rcpt_list;
meillo@10 720 rcpt_cnt = g_list_length(rcpt_list);
meillo@0 721
meillo@10 722 size = msg_calc_size(msg, TRUE);
meillo@0 723
meillo@10 724 /* respect maximum size given by server: */
meillo@10 725 if ((psb->max_size > 0) && (size > psb->max_size)) {
meillo@114 726 logwrite(LOG_WARNING, "%s == host=%s message size (%d) > "
meillo@114 727 "fixed maximum message size of server (%d)",
meillo@10 728 msg->uid, psb->remote_host, size, psb->max_size);
meillo@10 729 psb->error = smtp_cancel;
meillo@10 730 ok = FALSE;
meillo@10 731 }
meillo@0 732
meillo@10 733 if (ok) {
meillo@119 734 /* pretend the message is a bit larger,
meillo@119 735 just in case the size calculation is buggy */
meillo@119 736 smtp_cmd_mailfrom(psb, return_path, psb->use_size ? size+SMTP_SIZE_ADD : 0);
meillo@0 737
meillo@10 738 if (!psb->use_pipelining) {
meillo@10 739 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 740 ok = check_response(psb, FALSE);
meillo@10 741 }
meillo@10 742 }
meillo@10 743 if (ok) {
meillo@10 744 GList *rcpt_node;
meillo@10 745 rcpt_accept = 0;
meillo@0 746
meillo@10 747 for (rcpt_node = g_list_first(rcpt_list); rcpt_node != NULL; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 748 address *rcpt = (address *) (rcpt_node->data);
meillo@10 749 smtp_cmd_rcptto(psb, rcpt);
meillo@10 750 if (!psb->use_pipelining) {
meillo@10 751 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 752 if (check_response(psb, FALSE)) {
meillo@10 753 rcpt_accept++;
meillo@10 754 addr_mark_delivered(rcpt);
meillo@10 755 } else {
meillo@10 756 /* if server returned an error for one recp. we
meillo@10 757 may still try the others. But if it is a timeout, eof
meillo@10 758 or unexpected response, it is more serious and we should
meillo@10 759 give up. */
meillo@10 760 if ((psb->error != smtp_trylater) && (psb->error != smtp_fail)) {
meillo@10 761 ok = FALSE;
meillo@10 762 break;
meillo@10 763 } else {
meillo@114 764 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n",
meillo@15 765 msg->uid, addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 766 if (psb->error == smtp_trylater) {
meillo@10 767 addr_mark_defered(rcpt);
meillo@10 768 } else {
meillo@10 769 addr_mark_failed(rcpt);
meillo@10 770 }
meillo@10 771 }
meillo@10 772 } else
meillo@10 773 break;
meillo@10 774 }
meillo@10 775 }
meillo@0 776
meillo@10 777 /* There is no point in going on if no recp.s were accpted.
meillo@10 778 But we can check that at this point only if not pipelining: */
meillo@10 779 ok = (ok && (psb->use_pipelining || (rcpt_accept > 0)));
meillo@10 780 if (ok) {
meillo@0 781
meillo@10 782 fprintf(psb->out, "DATA\r\n");
meillo@10 783 fflush(psb->out);
meillo@0 784
meillo@177 785 DEBUG(4) debugf("C: DATA\r\n");
meillo@10 786
meillo@10 787 if (psb->use_pipelining) {
meillo@10 788 /* the first pl'ed command was MAIL FROM
meillo@10 789 the last was DATA, whose response can be handled by the 'normal' code
meillo@10 790 all in between were RCPT TO:
meillo@10 791 */
meillo@10 792 /* response to MAIL FROM: */
meillo@10 793 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 794 if ((ok = check_response(psb, FALSE))) {
meillo@10 795
meillo@10 796 /* response(s) to RCPT TO:
meillo@10 797 this is very similar to the sequence above for no pipeline
meillo@10 798 */
meillo@10 799 for (i = 0; i < rcpt_cnt; i++) {
meillo@10 800 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 801 address *rcpt = g_list_nth_data(rcpt_list, i);
meillo@10 802 if (check_response(psb, FALSE)) {
meillo@10 803 rcpt_accept++;
meillo@10 804 addr_mark_delivered(rcpt);
meillo@10 805 } else {
meillo@10 806 /* if server returned an error 4xx or 5xx for one recp. we
meillo@10 807 may still try the others. But if it is a timeout, eof
meillo@10 808 or unexpected response, it is more serious and we
meillo@10 809 should give up. */
meillo@10 810 if ((psb->error != smtp_trylater) &&
meillo@10 811 (psb->error != smtp_fail)) {
meillo@10 812 ok = FALSE;
meillo@10 813 break;
meillo@10 814 } else {
meillo@114 815 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s\n", msg->uid,
meillo@10 816 addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 817 if (psb->error == smtp_trylater) {
meillo@10 818 addr_mark_defered(rcpt);
meillo@10 819 } else {
meillo@10 820 addr_mark_failed(rcpt);
meillo@10 821 }
meillo@10 822 }
meillo@10 823 }
meillo@10 824 } else {
meillo@10 825 DEBUG(5) debugf("check_response failed after RCPT TO\n");
meillo@10 826 break;
meillo@10 827 }
meillo@10 828 }
meillo@10 829 if (rcpt_accept == 0)
meillo@10 830 ok = FALSE;
meillo@10 831 } else {
meillo@10 832 DEBUG(5) debugf("check_response failed after MAIL FROM\n");
meillo@10 833 }
meillo@10 834 } else {
meillo@10 835 DEBUG(5)
meillo@10 836 debugf("read_response failed after MAIL FROM\n");
meillo@10 837 }
meillo@10 838 }
meillo@10 839
meillo@10 840 /* if(psb->use_pipelining) */
meillo@10 841 /* response to the DATA cmd */
meillo@10 842 if (ok) {
meillo@10 843 if (read_response(psb, SMTP_DATA_TIMEOUT)) {
meillo@10 844 if (check_response(psb, TRUE)) {
meillo@10 845 send_header(psb, hdr_list);
meillo@10 846 send_data(psb, msg);
meillo@10 847
meillo@10 848 if (read_response(psb, SMTP_FINAL_TIMEOUT))
meillo@10 849 ok = check_response(psb, FALSE);
meillo@10 850 }
meillo@10 851 }
meillo@10 852 }
meillo@0 853 }
meillo@10 854 }
meillo@10 855
meillo@10 856 DEBUG(5) {
meillo@114 857 debugf("smtp_out_msg():\n");
meillo@114 858 debugf(" psb->error = %d\n", psb->error);
meillo@114 859 debugf(" ok = %d\n", ok);
meillo@114 860 debugf(" rcpt_accept = %d\n", rcpt_accept);
meillo@10 861 }
meillo@10 862
meillo@10 863 if (psb->error == smtp_ok) {
meillo@10 864 GList *rcpt_node;
meillo@10 865 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 866 address *rcpt = (address *) (rcpt_node->data);
meillo@10 867 if (addr_is_delivered(rcpt))
meillo@10 868 logwrite(LOG_NOTICE, "%s => %s host=%s with %s\n", msg->uid, addr_string(rcpt),
meillo@10 869 psb->remote_host, psb->use_esmtp ? "esmtp" : "smtp");
meillo@0 870 }
meillo@10 871 } else {
meillo@10 872 /* if something went wrong,
meillo@10 873 we have to unmark the rcpts prematurely marked as delivered
meillo@10 874 and mark the status */
meillo@10 875 smtp_out_mark_rcpts(psb, rcpt_list);
meillo@10 876
meillo@10 877 /* log the failure: */
meillo@10 878 smtp_out_log_failure(psb, msg);
meillo@0 879 }
meillo@10 880 return rcpt_accept;
meillo@0 881 }
meillo@0 882
meillo@10 883 gboolean
meillo@10 884 smtp_out_quit(smtp_base * psb)
meillo@0 885 {
meillo@10 886 fprintf(psb->out, "QUIT\r\n");
meillo@10 887 fflush(psb->out);
meillo@0 888
meillo@177 889 DEBUG(4) debugf("C: QUIT\n");
meillo@0 890
meillo@10 891 signal(SIGALRM, SIG_DFL);
meillo@10 892
meillo@10 893 return TRUE;
meillo@0 894 }
meillo@10 895
meillo@10 896 gint
meillo@10 897 smtp_deliver(gchar * host, gint port, GList * resolve_list, message * msg, address * return_path, GList * rcpt_list)
meillo@0 898 {
meillo@10 899 smtp_base *psb;
meillo@10 900 smtp_error err;
meillo@0 901
meillo@10 902 DEBUG(5) debugf("smtp_deliver entered\n");
meillo@0 903
meillo@10 904 if (return_path == NULL)
meillo@10 905 return_path = msg->return_path;
meillo@0 906
meillo@10 907 if ((psb = smtp_out_open(host, port, resolve_list))) {
meillo@10 908 set_heloname(psb, return_path->domain, TRUE);
meillo@10 909 /* initiate connection, send message and quit: */
meillo@10 910 if (smtp_out_init(psb)) {
meillo@10 911 smtp_out_msg(psb, msg, return_path, rcpt_list, NULL);
meillo@10 912 if (psb->error == smtp_ok || (psb->error == smtp_fail) || (psb->error == smtp_trylater)
meillo@10 913 || (psb->error == smtp_syntax) || (psb->error == smtp_cancel))
meillo@10 914 smtp_out_quit(psb);
meillo@10 915 }
meillo@10 916
meillo@10 917 err = psb->error;
meillo@10 918 destroy_smtpbase(psb);
meillo@10 919
meillo@10 920 return err;
meillo@10 921 }
meillo@10 922 return -1;
meillo@0 923 }