masqmail

annotate src/smtp_out.c @ 11:24872a9fe6e1

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merged
author meillo@marmaro.de
date Mon, 27 Oct 2008 16:23:31 +0100
parents 08114f7dcc23
children f671821d8222
rev   line source
meillo@0 1 /* smtp_out.c, Copyright (C) 1999-2001 Oliver Kurth,
meillo@0 2 *
meillo@0 3 * This program is free software; you can redistribute it and/or modify
meillo@0 4 * it under the terms of the GNU General Public License as published by
meillo@0 5 * the Free Software Foundation; either version 2 of the License, or
meillo@0 6 * (at your option) any later version.
meillo@10 7 *
meillo@0 8 * This program is distributed in the hope that it will be useful,
meillo@0 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 11 * GNU General Public License for more details.
meillo@0 12 *
meillo@0 13 * You should have received a copy of the GNU General Public License
meillo@0 14 * along with this program; if not, write to the Free Software
meillo@0 15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
meillo@0 16 */
meillo@0 17
meillo@0 18 /*
meillo@0 19 send bugs to: kurth@innominate.de
meillo@0 20 */
meillo@0 21
meillo@0 22 /*
meillo@0 23 I always forget these rfc numbers:
meillo@0 24 RFC 821 (SMTP)
meillo@0 25 RFC 1869 (ESMTP)
meillo@0 26 RFC 1870 (ESMTP SIZE)
meillo@0 27 RFC 2197 (ESMTP PIPELINE)
meillo@0 28 RFC 2554 (ESMTP AUTH)
meillo@0 29 */
meillo@0 30
meillo@0 31 #include "masqmail.h"
meillo@0 32 #include "smtp_out.h"
meillo@0 33 #include "readsock.h"
meillo@0 34
meillo@0 35 #ifdef ENABLE_AUTH
meillo@0 36
meillo@0 37 #ifdef USE_LIB_CRYPTO
meillo@0 38 #include <openssl/hmac.h>
meillo@0 39 #include <openssl/md5.h>
meillo@0 40 #include <openssl/evp.h>
meillo@0 41 #else
meillo@0 42 #include "md5/global.h"
meillo@0 43 #include "md5/md5.h"
meillo@0 44 #include "md5/hmac_md5.h"
meillo@0 45 #endif
meillo@0 46
meillo@0 47 #include "base64/base64.h"
meillo@0 48 #endif
meillo@0 49
meillo@10 50 void
meillo@10 51 destroy_smtpbase(smtp_base * psb)
meillo@0 52 {
meillo@10 53 fclose(psb->in);
meillo@10 54 fclose(psb->out);
meillo@0 55
meillo@10 56 close(psb->sock);
meillo@0 57
meillo@10 58 if (psb->helo_name)
meillo@10 59 g_free(psb->helo_name);
meillo@10 60 if (psb->buffer)
meillo@10 61 g_free(psb->buffer);
meillo@10 62 if (psb->auth_names)
meillo@10 63 g_strfreev(psb->auth_names);
meillo@0 64
meillo@10 65 if (psb->auth_name)
meillo@10 66 g_free(psb->auth_name);
meillo@10 67 if (psb->auth_login)
meillo@10 68 g_free(psb->auth_login);
meillo@10 69 if (psb->auth_secret)
meillo@10 70 g_free(psb->auth_secret);
meillo@0 71 }
meillo@0 72
meillo@10 73 gchar*
meillo@10 74 set_heloname(smtp_base * psb, gchar * default_name, gboolean do_correct)
meillo@0 75 {
meillo@10 76 struct sockaddr_in sname;
meillo@10 77 int len = sizeof(struct sockaddr_in);
meillo@10 78 struct hostent *host_entry;
meillo@0 79
meillo@10 80 if (do_correct) {
meillo@10 81 getsockname(psb->sock, (struct sockaddr *) (&sname), &len);
meillo@10 82 DEBUG(5) debugf("socket: name.sin_addr = %s\n", inet_ntoa(sname.sin_addr));
meillo@10 83 host_entry = gethostbyaddr((const char *) &(sname.sin_addr), sizeof(sname.sin_addr), AF_INET);
meillo@10 84 if (host_entry) {
meillo@10 85 psb->helo_name = g_strdup(host_entry->h_name);
meillo@10 86 } else {
meillo@10 87 /* we failed to look up our own name. Instead of giving our local hostname,
meillo@10 88 we may give our IP number to show the server that we are at least
meillo@10 89 willing to be honest. For the really picky ones. */
meillo@10 90 DEBUG(5) debugf("failed to look up own host name.\n");
meillo@10 91 psb->helo_name = g_strdup_printf("[%s]", inet_ntoa(sname.sin_addr));
meillo@10 92 }
meillo@10 93 DEBUG(5) debugf("helo_name = %s\n", psb->helo_name);
meillo@10 94 }
meillo@10 95 if (psb->helo_name == NULL) {
meillo@10 96 psb->helo_name = g_strdup(default_name);
meillo@10 97 }
meillo@10 98 return psb->helo_name;
meillo@10 99 }
meillo@0 100
meillo@0 101 #ifdef ENABLE_AUTH
meillo@0 102
meillo@10 103 gboolean
meillo@10 104 set_auth(smtp_base * psb, gchar * name, gchar * login, gchar * secret)
meillo@0 105 {
meillo@10 106 if ((strcasecmp(name, "CRAM-MD5") == 0) || (strcasecmp(name, "LOGIN") == 0)) {
meillo@10 107 psb->auth_name = g_strdup(name);
meillo@10 108 psb->auth_login = g_strdup(login);
meillo@10 109 psb->auth_secret = g_strdup(secret);
meillo@10 110
meillo@10 111 return TRUE;
meillo@10 112 }
meillo@10 113 return FALSE;
meillo@0 114 }
meillo@0 115
meillo@0 116 #endif
meillo@0 117
meillo@10 118 static smtp_base*
meillo@10 119 create_smtpbase(gint sock)
meillo@0 120 {
meillo@10 121 gint dup_sock;
meillo@0 122
meillo@10 123 smtp_base *psb = (smtp_base *) g_malloc(sizeof(smtp_base));
meillo@0 124
meillo@10 125 psb->sock = sock;
meillo@0 126
meillo@10 127 psb->use_esmtp = FALSE;
meillo@10 128 psb->use_size = FALSE;
meillo@10 129 psb->use_pipelining = FALSE;
meillo@10 130 psb->use_auth = FALSE;
meillo@0 131
meillo@10 132 psb->max_size = 0;
meillo@10 133 psb->auth_names = NULL;
meillo@0 134
meillo@10 135 psb->buffer = (gchar *) g_malloc(SMTP_BUF_LEN);
meillo@0 136
meillo@10 137 dup_sock = dup(sock);
meillo@10 138 psb->out = fdopen(sock, "w");
meillo@10 139 psb->in = fdopen(dup_sock, "r");
meillo@0 140
meillo@10 141 psb->error = smtp_ok;
meillo@0 142
meillo@10 143 psb->helo_name = NULL;
meillo@0 144
meillo@10 145 psb->auth_name = psb->auth_login = psb->auth_secret = NULL;
meillo@10 146
meillo@10 147 return psb;
meillo@0 148 }
meillo@0 149
meillo@10 150 static gboolean
meillo@10 151 read_response(smtp_base * psb, int timeout)
meillo@0 152 {
meillo@10 153 gint buf_pos = 0;
meillo@10 154 gchar code[5];
meillo@10 155 gint i, len;
meillo@0 156
meillo@10 157 do {
meillo@10 158 len = read_sockline(psb->in, &(psb->buffer[buf_pos]), SMTP_BUF_LEN - buf_pos, timeout, READSOCKL_CHUG);
meillo@10 159 if (len == -3) {
meillo@10 160 psb->error = smtp_timeout;
meillo@10 161 return FALSE;
meillo@10 162 } else if (len == -2) {
meillo@10 163 psb->error = smtp_syntax;
meillo@10 164 return FALSE;
meillo@10 165 } else if (len == -1) {
meillo@10 166 psb->error = smtp_eof;
meillo@10 167 return FALSE;
meillo@10 168 }
meillo@10 169 for (i = 0; i < 4; i++)
meillo@10 170 code[i] = psb->buffer[buf_pos + i];
meillo@10 171 code[i] = 0;
meillo@10 172 psb->last_code = atoi(code);
meillo@0 173
meillo@10 174 buf_pos += len;
meillo@0 175
meillo@10 176 } while (code[3] == '-');
meillo@0 177
meillo@10 178 return TRUE;
meillo@0 179 }
meillo@0 180
meillo@10 181 static gboolean
meillo@10 182 check_response(smtp_base * psb, gboolean after_data)
meillo@0 183 {
meillo@10 184 char c = psb->buffer[0];
meillo@0 185
meillo@10 186 if (((c == '2') && !after_data) || ((c == '3') && after_data)) {
meillo@10 187 psb->error = smtp_ok;
meillo@10 188 DEBUG(6) debugf("response OK:'%s' after_date = %d\n", psb->buffer, (int) after_data);
meillo@10 189 return TRUE;
meillo@10 190 } else {
meillo@10 191 if (c == '4')
meillo@10 192 psb->error = smtp_trylater;
meillo@10 193 else if (c == '5')
meillo@10 194 psb->error = smtp_fail;
meillo@10 195 else
meillo@10 196 psb->error = smtp_syntax;
meillo@10 197 DEBUG(6) debugf("response failure:'%s' after_date = %d\n", psb->buffer, (int) after_data);
meillo@10 198 return FALSE;
meillo@10 199 }
meillo@0 200 }
meillo@0 201
meillo@10 202 static gboolean
meillo@10 203 check_init_response(smtp_base * psb)
meillo@0 204 {
meillo@10 205 if (check_response(psb, FALSE)) {
meillo@10 206 psb->use_esmtp = (strstr(psb->buffer, "ESMTP") != NULL);
meillo@0 207
meillo@10 208 DEBUG(4) debugf(psb->use_esmtp ? "uses esmtp\n" : "no esmtp\n");
meillo@0 209
meillo@10 210 return TRUE;
meillo@10 211 }
meillo@10 212 return FALSE;
meillo@0 213 }
meillo@0 214
meillo@10 215 static gchar*
meillo@10 216 get_response_arg(gchar * response)
meillo@0 217 {
meillo@10 218 gchar buf[SMTP_BUF_LEN];
meillo@10 219 gchar *p = response, *q = buf;
meillo@0 220
meillo@10 221 while (*p && (*p != '\n') && isspace(*p))
meillo@10 222 p++;
meillo@10 223 if (*p && (*p != '\n')) {
meillo@10 224 while (*p && (*p != '\n') && (*p != '\r') && (q < buf + SMTP_BUF_LEN - 1))
meillo@10 225 *(q++) = *(p++);
meillo@10 226 *q = 0;
meillo@10 227 return g_strdup(buf);
meillo@10 228 }
meillo@10 229 return NULL;
meillo@0 230 }
meillo@0 231
meillo@10 232 static gboolean
meillo@10 233 check_helo_response(smtp_base * psb)
meillo@0 234 {
meillo@10 235 gchar *ptr = psb->buffer;
meillo@0 236
meillo@10 237 if (!check_response(psb, FALSE))
meillo@10 238 return FALSE;
meillo@0 239
meillo@10 240 while (*ptr) {
meillo@10 241 if (strncasecmp(&(ptr[4]), "SIZE", 4) == 0) {
meillo@10 242 gchar *arg;
meillo@10 243 psb->use_size = TRUE;
meillo@10 244 arg = get_response_arg(&(ptr[8]));
meillo@10 245 if (arg) {
meillo@10 246 psb->max_size = atoi(arg);
meillo@10 247 g_free(arg);
meillo@10 248 }
meillo@10 249 }
meillo@0 250
meillo@10 251 if (strncasecmp(&(ptr[4]), "PIPELINING", 10) == 0)
meillo@10 252 psb->use_pipelining = TRUE;
meillo@0 253
meillo@10 254 if (strncasecmp(&(ptr[4]), "AUTH", 4) == 0) {
meillo@10 255 if ((ptr[8] == ' ') || (ptr[8] == '=') || (ptr[8] == '\t')) { /* not sure about '\t' */
meillo@10 256 gchar *arg;
meillo@10 257 psb->use_auth = TRUE;
meillo@10 258 arg = get_response_arg(&(ptr[9])); /* after several years I finally learnt to count */
meillo@10 259 if (arg) {
meillo@10 260 psb->auth_names = g_strsplit(arg, " ", 0);
meillo@10 261 g_free(arg);
meillo@10 262
meillo@10 263 DEBUG(4) {
meillo@10 264 gint i = 0;
meillo@10 265 while (psb->auth_names[i]) {
meillo@10 266 debugf("offered AUTH %s\n", psb->auth_names[i]);
meillo@10 267 i++;
meillo@10 268 }
meillo@10 269 }
meillo@10 270 }
meillo@10 271 }
meillo@10 272 }
meillo@10 273
meillo@10 274 while (*ptr != '\n')
meillo@10 275 ptr++;
meillo@10 276 ptr++;
meillo@0 277 }
meillo@0 278
meillo@10 279 DEBUG(4) {
meillo@10 280 debugf(psb->use_size ? "uses SIZE\n" : "no size\n");
meillo@10 281 debugf(psb->use_pipelining ? "uses PIPELINING\n" : "no pipelining\n");
meillo@10 282 debugf(psb->use_auth ? "uses AUTH\n" : "no auth\n");
meillo@10 283 }
meillo@0 284
meillo@10 285 return TRUE;
meillo@0 286 }
meillo@0 287
meillo@10 288 static gboolean
meillo@10 289 smtp_helo(smtp_base * psb, gchar * helo)
meillo@0 290 {
meillo@10 291 while (TRUE) {
meillo@10 292 if (psb->use_esmtp) {
meillo@10 293 fprintf(psb->out, "EHLO %s\r\n", helo);
meillo@10 294 fflush(psb->out);
meillo@0 295
meillo@10 296 DEBUG(4) debugf("EHLO %s\r\n", helo);
meillo@0 297
meillo@10 298 } else {
meillo@10 299 fprintf(psb->out, "HELO %s\r\n", helo);
meillo@10 300 fflush(psb->out);
meillo@0 301
meillo@10 302 DEBUG(4) debugf("HELO %s\r\n", helo);
meillo@0 303
meillo@10 304 }
meillo@0 305
meillo@10 306 if (!read_response(psb, SMTP_CMD_TIMEOUT))
meillo@10 307 return FALSE;
meillo@10 308
meillo@10 309 if (check_helo_response(psb))
meillo@10 310 return TRUE;
meillo@10 311 else {
meillo@10 312 if (psb->error == smtp_fail) {
meillo@10 313 if (psb->use_esmtp) {
meillo@10 314 /* our guess that server understands EHLO was wrong, try again with HELO */
meillo@10 315 psb->use_esmtp = FALSE;
meillo@10 316 } else {
meillo@10 317 /* what sort of server ist THAT ?! give up... */
meillo@10 318 return FALSE;
meillo@10 319 }
meillo@10 320 } else
meillo@10 321 return FALSE;
meillo@10 322 }
meillo@0 323 }
meillo@0 324 }
meillo@0 325
meillo@10 326 static void
meillo@10 327 smtp_cmd_mailfrom(smtp_base * psb, address * return_path, guint size)
meillo@0 328 {
meillo@10 329 if (psb->use_size) {
meillo@10 330 fprintf(psb->out, "MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@10 331 fflush(psb->out);
meillo@0 332
meillo@10 333 DEBUG(4) debugf("MAIL FROM:%s SIZE=%d\r\n", addr_string(return_path), size);
meillo@0 334
meillo@10 335 } else {
meillo@10 336 fprintf(psb->out, "MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 337 fflush(psb->out);
meillo@0 338
meillo@10 339 DEBUG(4) debugf("MAIL FROM:%s\r\n", addr_string(return_path));
meillo@10 340 }
meillo@0 341 }
meillo@0 342
meillo@10 343 static void
meillo@10 344 smtp_cmd_rcptto(smtp_base * psb, address * rcpt)
meillo@0 345 {
meillo@10 346 fprintf(psb->out, "RCPT TO:%s\r\n", addr_string(rcpt));
meillo@10 347 fflush(psb->out);
meillo@10 348 DEBUG(4) debugf("RCPT TO:%s\n", addr_string(rcpt));
meillo@0 349 }
meillo@0 350
meillo@10 351 static void
meillo@10 352 send_data_line(smtp_base * psb, gchar * data)
meillo@0 353 {
meillo@10 354 /* According to RFC 821 each line should be terminated with CRLF.
meillo@10 355 Since a dot on a line itself marks the end of data, each line
meillo@10 356 beginning with a dot is prepended with another dot.
meillo@10 357 */
meillo@10 358 gchar *ptr;
meillo@10 359 gboolean new_line = TRUE; /* previous versions assumed that each item was exactly one line. This is no longer the case */
meillo@0 360
meillo@10 361 ptr = data;
meillo@10 362 while (*ptr) {
meillo@10 363 int c = (int) (*ptr);
meillo@10 364 if (c == '.')
meillo@10 365 if (new_line)
meillo@10 366 putc('.', psb->out);
meillo@10 367 if (c == '\n') {
meillo@10 368 putc('\r', psb->out);
meillo@10 369 putc('\n', psb->out);
meillo@10 370 new_line = TRUE;
meillo@10 371 } else {
meillo@10 372 putc(c, psb->out);
meillo@10 373 new_line = FALSE;
meillo@10 374 }
meillo@10 375 ptr++;
meillo@10 376 }
meillo@0 377 }
meillo@0 378
meillo@10 379 static void
meillo@10 380 send_header(smtp_base * psb, GList * hdr_list)
meillo@0 381 {
meillo@10 382 GList *node;
meillo@10 383 gint num_hdrs = 0;
meillo@0 384
meillo@10 385 /* header */
meillo@10 386 if (hdr_list) {
meillo@10 387 foreach(hdr_list, node) {
meillo@10 388 if (node->data) {
meillo@10 389 header *hdr = (header *) (node->data);
meillo@10 390 if (hdr->header) {
meillo@10 391 send_data_line(psb, hdr->header);
meillo@10 392 num_hdrs++;
meillo@10 393 }
meillo@10 394 }
meillo@10 395 }
meillo@0 396 }
meillo@0 397
meillo@10 398 /* empty line separating headers from data: */
meillo@10 399 putc('\r', psb->out);
meillo@10 400 putc('\n', psb->out);
meillo@0 401
meillo@10 402 DEBUG(4) debugf("sent %d headers\n", num_hdrs);
meillo@0 403 }
meillo@0 404
meillo@10 405 static void
meillo@10 406 send_data(smtp_base * psb, message * msg)
meillo@0 407 {
meillo@10 408 GList *node;
meillo@10 409 gint num_lines = 0;
meillo@0 410
meillo@10 411 /* data */
meillo@10 412 if (msg->data_list) {
meillo@10 413 for (node = g_list_first(msg->data_list); node; node = g_list_next(node)) {
meillo@10 414 if (node->data) {
meillo@10 415 send_data_line(psb, node->data);
meillo@10 416 num_lines++;
meillo@10 417 }
meillo@10 418 }
meillo@10 419 }
meillo@0 420
meillo@10 421 DEBUG(4) debugf("sent %d lines of data\n", num_lines);
meillo@0 422
meillo@10 423 fprintf(psb->out, ".\r\n");
meillo@10 424 fflush(psb->out);
meillo@0 425 }
meillo@0 426
meillo@10 427 void
meillo@10 428 smtp_out_mark_rcpts(smtp_base * psb, GList * rcpt_list)
meillo@0 429 {
meillo@10 430 GList *rcpt_node;
meillo@10 431 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 432 address *rcpt = (address *) (rcpt_node->data);
meillo@0 433
meillo@10 434 addr_unmark_delivered(rcpt);
meillo@0 435
meillo@10 436 if ((psb->error == smtp_trylater) || (psb->error == smtp_timeout) || (psb->error == smtp_eof)) {
meillo@10 437 addr_mark_defered(rcpt);
meillo@10 438 } else {
meillo@10 439 addr_mark_failed(rcpt);
meillo@10 440 }
meillo@10 441 }
meillo@0 442 }
meillo@0 443
meillo@10 444 void
meillo@10 445 smtp_out_log_failure(smtp_base * psb, message * msg)
meillo@0 446 {
meillo@10 447 gchar *err_str;
meillo@0 448
meillo@10 449 if (psb->error == smtp_timeout)
meillo@10 450 err_str = g_strdup("connection timed out.");
meillo@10 451 else if (psb->error == smtp_eof)
meillo@10 452 err_str = g_strdup("connection terminated prematurely.");
meillo@10 453 else if (psb->error == smtp_syntax)
meillo@10 454 err_str = g_strdup_printf("got unexpected response: %s", psb->buffer);
meillo@10 455 else if (psb->error == smtp_cancel)
meillo@10 456 err_str = g_strdup("delivery was canceled.\n");
meillo@10 457 else
meillo@10 458 /* error message should still be in the buffer */
meillo@10 459 err_str = g_strdup_printf("failed: %s\n", psb->buffer);
meillo@0 460
meillo@10 461 if (msg == NULL)
meillo@10 462 logwrite(LOG_NOTICE, "host=%s %s\n", psb->remote_host, err_str);
meillo@10 463 else
meillo@10 464 logwrite(LOG_NOTICE, "%s == host=%s %s\n", msg->uid, psb->remote_host, err_str);
meillo@0 465
meillo@10 466 g_free(err_str);
meillo@0 467 }
meillo@0 468
meillo@10 469 smtp_base*
meillo@10 470 smtp_out_open(gchar * host, gint port, GList * resolve_list)
meillo@0 471 {
meillo@10 472 smtp_base *psb;
meillo@10 473 gint sock;
meillo@10 474 mxip_addr *addr;
meillo@0 475
meillo@10 476 DEBUG(5) debugf("smtp_out_open entered, host = %s\n", host);
meillo@0 477
meillo@10 478 if ((addr = connect_resolvelist(&sock, host, port, resolve_list))) {
meillo@10 479 /* create structure to hold status data: */
meillo@10 480 psb = create_smtpbase(sock);
meillo@10 481 psb->remote_host = addr->name;
meillo@0 482
meillo@10 483 DEBUG(5) {
meillo@10 484 struct sockaddr_in name;
meillo@10 485 int len = sizeof(struct sockaddr);
meillo@10 486 getsockname(sock, (struct sockaddr *) (&name), &len);
meillo@10 487 debugf("socket: name.sin_addr = %s\n", inet_ntoa(name.sin_addr));
meillo@10 488 }
meillo@10 489 return psb;
meillo@10 490 } else {
meillo@10 491 DEBUG(5) debugf("connect_resolvelist failed: %s %s\n", strerror(errno), hstrerror(h_errno));
meillo@10 492 }
meillo@0 493
meillo@10 494 return NULL;
meillo@0 495 }
meillo@0 496
meillo@10 497 smtp_base*
meillo@10 498 smtp_out_open_child(gchar * cmd)
meillo@0 499 {
meillo@10 500 smtp_base *psb;
meillo@10 501 gint sock;
meillo@0 502
meillo@10 503 DEBUG(5) debugf("smtp_out_open_child entered, cmd = %s\n", cmd);
meillo@0 504
meillo@10 505 sock = child(cmd);
meillo@0 506
meillo@10 507 if (sock > 0) {
meillo@10 508 psb = create_smtpbase(sock);
meillo@10 509 psb->remote_host = NULL;
meillo@0 510
meillo@10 511 return psb;
meillo@10 512 }
meillo@0 513
meillo@10 514 return NULL;
meillo@0 515 }
meillo@0 516
meillo@10 517 gboolean
meillo@10 518 smtp_out_rset(smtp_base * psb)
meillo@0 519 {
meillo@10 520 gboolean ok;
meillo@0 521
meillo@10 522 fprintf(psb->out, "RSET\r\n");
meillo@10 523 fflush(psb->out);
meillo@10 524 DEBUG(4) debugf("RSET\n");
meillo@0 525
meillo@10 526 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 527 if (check_response(psb, FALSE))
meillo@10 528 return TRUE;
meillo@0 529
meillo@10 530 smtp_out_log_failure(psb, NULL);
meillo@10 531
meillo@10 532 return FALSE;
meillo@0 533 }
meillo@0 534
meillo@0 535 #ifdef ENABLE_AUTH
meillo@0 536
meillo@10 537 static gboolean
meillo@10 538 smtp_out_auth_cram_md5(smtp_base * psb)
meillo@0 539 {
meillo@10 540 gboolean ok = FALSE;
meillo@0 541
meillo@10 542 fprintf(psb->out, "AUTH CRAM-MD5\r\n");
meillo@10 543 fflush(psb->out);
meillo@10 544 DEBUG(4) debugf("AUTH CRAM-MD5\n");
meillo@10 545 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 546 if ((ok = check_response(psb, TRUE))) {
meillo@10 547 gchar *chall64 = get_response_arg(&(psb->buffer[4]));
meillo@10 548 gint chall_size;
meillo@10 549 gchar *chall = base64_decode(chall64, &chall_size);
meillo@10 550 guchar digest[16], *reply64, *reply;
meillo@10 551 gchar digest_string[33];
meillo@10 552 gint i;
meillo@0 553 #ifdef USE_LIB_CRYPTO
meillo@10 554 unsigned int digest_len;
meillo@0 555 #endif
meillo@10 556
meillo@10 557 DEBUG(5) debugf("encoded challenge = %s\n", chall64);
meillo@10 558 DEBUG(5) debugf("decoded challenge = %s, size = %d\n", chall, chall_size);
meillo@10 559
meillo@10 560 DEBUG(5) debugf("secret = %s\n", psb->auth_secret);
meillo@10 561
meillo@0 562 #ifdef USE_LIB_CRYPTO
meillo@10 563 HMAC(EVP_md5(), psb->auth_secret, strlen(psb->auth_secret), chall, chall_size, digest, &digest_len);
meillo@0 564 #else
meillo@10 565 hmac_md5(chall, chall_size, psb->auth_secret, strlen(psb->auth_secret), digest);
meillo@0 566 #endif
meillo@10 567
meillo@10 568 for (i = 0; i < 16; i++)
meillo@10 569 sprintf(&(digest_string[i + i]), "%02x", (unsigned int) (digest[i]));
meillo@10 570 digest_string[32] = 0;
meillo@10 571
meillo@10 572 DEBUG(5) debugf("digest = %s\n", digest_string);
meillo@10 573
meillo@10 574 reply = g_strdup_printf("%s %s", psb->auth_login, digest_string);
meillo@10 575 DEBUG(5) debugf("unencoded reply = %s\n", reply);
meillo@10 576
meillo@10 577 reply64 = base64_encode(reply, strlen(reply));
meillo@10 578 DEBUG(5) debugf("encoded reply = %s\n", reply64);
meillo@10 579
meillo@10 580 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 581 fflush(psb->out);
meillo@10 582 DEBUG(4) debugf("%s\n", reply64);
meillo@10 583
meillo@10 584 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 585 ok = check_response(psb, FALSE);
meillo@10 586
meillo@10 587 g_free(reply64);
meillo@10 588 g_free(reply);
meillo@10 589 g_free(chall);
meillo@10 590 g_free(chall64);
meillo@10 591 }
meillo@10 592 }
meillo@10 593 return ok;
meillo@0 594 }
meillo@0 595
meillo@10 596 static gboolean
meillo@10 597 smtp_out_auth_login(smtp_base * psb)
meillo@0 598 {
meillo@10 599 gboolean ok = FALSE;
meillo@10 600 fprintf(psb->out, "AUTH LOGIN\r\n");
meillo@10 601 fflush(psb->out);
meillo@10 602 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 603 if ((ok = check_response(psb, TRUE))) {
meillo@10 604 gchar *resp64;
meillo@10 605 guchar *resp;
meillo@10 606 gint resp_size;
meillo@10 607 gchar *reply64;
meillo@10 608
meillo@10 609 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@10 610 DEBUG(5) debugf("encoded response = %s\n", resp64);
meillo@10 611 resp = base64_decode(resp64, &resp_size);
meillo@10 612 g_free(resp64);
meillo@10 613 DEBUG(5) debugf("decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 614 g_free(resp);
meillo@10 615 reply64 = base64_encode(psb->auth_login, strlen(psb->auth_login));
meillo@10 616 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 617 fflush(psb->out);
meillo@10 618 g_free(reply64);
meillo@10 619 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 620 if ((ok = check_response(psb, TRUE))) {
meillo@10 621 resp64 = get_response_arg(&(psb->buffer[4]));
meillo@10 622 DEBUG(5) debugf("encoded response = %s\n", resp64);
meillo@10 623 resp = base64_decode(resp64, &resp_size);
meillo@10 624 g_free(resp64);
meillo@10 625 DEBUG(5) debugf("decoded response = %s, size = %d\n", resp, resp_size);
meillo@10 626 g_free(resp);
meillo@10 627 reply64 = base64_encode(psb->auth_secret, strlen(psb->auth_secret));
meillo@10 628 fprintf(psb->out, "%s\r\n", reply64);
meillo@10 629 fflush(psb->out);
meillo@10 630 g_free(reply64);
meillo@10 631 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 632 ok = check_response(psb, FALSE);
meillo@10 633 }
meillo@10 634 }
meillo@10 635 }
meillo@0 636 }
meillo@10 637 return ok;
meillo@0 638 }
meillo@0 639
meillo@10 640 gboolean
meillo@10 641 smtp_out_auth(smtp_base * psb)
meillo@0 642 {
meillo@10 643 gboolean ok = FALSE;
meillo@10 644 gint i = 0;
meillo@10 645 while (psb->auth_names[i]) {
meillo@10 646 if (strcasecmp(psb->auth_names[i], psb->auth_name) == 0)
meillo@10 647 break;
meillo@10 648 i++;
meillo@10 649 }
meillo@10 650 if (psb->auth_names[i]) {
meillo@10 651 if (strcasecmp(psb->auth_name, "cram-md5") == 0) {
meillo@10 652 smtp_out_auth_cram_md5(psb);
meillo@10 653 } else if (strcasecmp(psb->auth_name, "login") == 0) {
meillo@10 654 smtp_out_auth_login(psb);
meillo@10 655 } else {
meillo@10 656 logwrite(LOG_ERR, "auth method %s not supported\n", psb->auth_name);
meillo@10 657 }
meillo@10 658 } else {
meillo@10 659 logwrite(LOG_ERR, "no auth method %s found.\n", psb->auth_name);
meillo@10 660 }
meillo@10 661 return ok;
meillo@0 662 }
meillo@0 663
meillo@0 664 #endif
meillo@0 665
meillo@10 666 gboolean
meillo@10 667 smtp_out_init(smtp_base * psb)
meillo@0 668 {
meillo@10 669 gboolean ok;
meillo@0 670
meillo@10 671 if ((ok = read_response(psb, SMTP_INITIAL_TIMEOUT))) {
meillo@10 672 if ((ok = check_init_response(psb))) {
meillo@10 673
meillo@10 674 if ((ok = smtp_helo(psb, psb->helo_name))) {
meillo@0 675 #ifdef ENABLE_AUTH
meillo@10 676 if (psb->auth_name && psb->use_auth) {
meillo@10 677 /* we completely disregard the response of server here. If
meillo@10 678 authentication fails, the server will complain later
meillo@10 679 anyway. I know, this is not polite... */
meillo@10 680 smtp_out_auth(psb);
meillo@10 681 }
meillo@10 682 #endif
meillo@10 683 }
meillo@10 684 }
meillo@0 685 }
meillo@10 686 if (!ok)
meillo@10 687 smtp_out_log_failure(psb, NULL);
meillo@10 688 return ok;
meillo@0 689 }
meillo@0 690
meillo@10 691 gint
meillo@10 692 smtp_out_msg(smtp_base * psb, message * msg, address * return_path, GList * rcpt_list, GList * hdr_list)
meillo@0 693 {
meillo@10 694 gint i, size;
meillo@10 695 gboolean ok = TRUE;
meillo@10 696 int rcpt_cnt;
meillo@10 697 int rcpt_accept = 0;
meillo@0 698
meillo@10 699 DEBUG(5) debugf("smtp_out_msg entered\n");
meillo@0 700
meillo@10 701 /* defaults: */
meillo@10 702 if (return_path == NULL)
meillo@10 703 return_path = msg->return_path;
meillo@10 704 if (hdr_list == NULL)
meillo@10 705 hdr_list = msg->hdr_list;
meillo@10 706 if (rcpt_list == NULL)
meillo@10 707 rcpt_list = msg->rcpt_list;
meillo@10 708 rcpt_cnt = g_list_length(rcpt_list);
meillo@0 709
meillo@10 710 size = msg_calc_size(msg, TRUE);
meillo@0 711
meillo@10 712 /* respect maximum size given by server: */
meillo@10 713 if ((psb->max_size > 0) && (size > psb->max_size)) {
meillo@10 714 logwrite(LOG_WARNING, "%s == host=%s message size (%d) > fixed maximum message size of server (%d)",
meillo@10 715 msg->uid, psb->remote_host, size, psb->max_size);
meillo@10 716 psb->error = smtp_cancel;
meillo@10 717 ok = FALSE;
meillo@10 718 }
meillo@0 719
meillo@10 720 if (ok) {
meillo@10 721 smtp_cmd_mailfrom(psb, return_path, psb->use_size ? size + SMTP_SIZE_ADD : 0);
meillo@0 722
meillo@10 723 if (!psb->use_pipelining) {
meillo@10 724 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 725 ok = check_response(psb, FALSE);
meillo@10 726 }
meillo@10 727 }
meillo@10 728 if (ok) {
meillo@10 729 GList *rcpt_node;
meillo@10 730 rcpt_accept = 0;
meillo@0 731
meillo@10 732 for (rcpt_node = g_list_first(rcpt_list); rcpt_node != NULL; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 733 address *rcpt = (address *) (rcpt_node->data);
meillo@10 734 smtp_cmd_rcptto(psb, rcpt);
meillo@10 735 if (!psb->use_pipelining) {
meillo@10 736 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT)))
meillo@10 737 if (check_response(psb, FALSE)) {
meillo@10 738 rcpt_accept++;
meillo@10 739 addr_mark_delivered(rcpt);
meillo@10 740 } else {
meillo@10 741 /* if server returned an error for one recp. we
meillo@10 742 may still try the others. But if it is a timeout, eof
meillo@10 743 or unexpected response, it is more serious and we should
meillo@10 744 give up. */
meillo@10 745 if ((psb->error != smtp_trylater) && (psb->error != smtp_fail)) {
meillo@10 746 ok = FALSE;
meillo@10 747 break;
meillo@10 748 } else {
meillo@10 749 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s", msg->uid, addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 750 if (psb->error == smtp_trylater) {
meillo@10 751 addr_mark_defered(rcpt);
meillo@10 752 } else {
meillo@10 753 addr_mark_failed(rcpt);
meillo@10 754 }
meillo@10 755 }
meillo@10 756 } else
meillo@10 757 break;
meillo@10 758 }
meillo@10 759 }
meillo@0 760
meillo@10 761 /* There is no point in going on if no recp.s were accpted.
meillo@10 762 But we can check that at this point only if not pipelining: */
meillo@10 763 ok = (ok && (psb->use_pipelining || (rcpt_accept > 0)));
meillo@10 764 if (ok) {
meillo@0 765
meillo@10 766 fprintf(psb->out, "DATA\r\n");
meillo@10 767 fflush(psb->out);
meillo@0 768
meillo@10 769 DEBUG(4) debugf("DATA\r\n");
meillo@10 770
meillo@10 771 if (psb->use_pipelining) {
meillo@10 772 /* the first pl'ed command was MAIL FROM
meillo@10 773 the last was DATA, whose response can be handled by the 'normal' code
meillo@10 774 all in between were RCPT TO:
meillo@10 775 */
meillo@10 776 /* response to MAIL FROM: */
meillo@10 777 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 778 if ((ok = check_response(psb, FALSE))) {
meillo@10 779
meillo@10 780 /* response(s) to RCPT TO:
meillo@10 781 this is very similar to the sequence above for no pipeline
meillo@10 782 */
meillo@10 783 for (i = 0; i < rcpt_cnt; i++) {
meillo@10 784 if ((ok = read_response(psb, SMTP_CMD_TIMEOUT))) {
meillo@10 785 address *rcpt = g_list_nth_data(rcpt_list, i);
meillo@10 786 if (check_response(psb, FALSE)) {
meillo@10 787 rcpt_accept++;
meillo@10 788 addr_mark_delivered(rcpt);
meillo@10 789 } else {
meillo@10 790 /* if server returned an error 4xx or 5xx for one recp. we
meillo@10 791 may still try the others. But if it is a timeout, eof
meillo@10 792 or unexpected response, it is more serious and we
meillo@10 793 should give up. */
meillo@10 794 if ((psb->error != smtp_trylater) &&
meillo@10 795 (psb->error != smtp_fail)) {
meillo@10 796 ok = FALSE;
meillo@10 797 break;
meillo@10 798 } else {
meillo@10 799 logwrite(LOG_NOTICE, "%s == %s host=%s failed: %s", msg->uid,
meillo@10 800 addr_string(rcpt), psb->remote_host, psb->buffer);
meillo@10 801 if (psb->error == smtp_trylater) {
meillo@10 802 addr_mark_defered(rcpt);
meillo@10 803 } else {
meillo@10 804 addr_mark_failed(rcpt);
meillo@10 805 }
meillo@10 806 }
meillo@10 807 }
meillo@10 808 } else {
meillo@10 809 DEBUG(5) debugf("check_response failed after RCPT TO\n");
meillo@10 810 break;
meillo@10 811 }
meillo@10 812 }
meillo@10 813 if (rcpt_accept == 0)
meillo@10 814 ok = FALSE;
meillo@10 815 } else {
meillo@10 816 DEBUG(5) debugf("check_response failed after MAIL FROM\n");
meillo@10 817 }
meillo@10 818 } else {
meillo@10 819 DEBUG(5)
meillo@10 820 debugf("read_response failed after MAIL FROM\n");
meillo@10 821 }
meillo@10 822 }
meillo@10 823
meillo@10 824 /* if(psb->use_pipelining) */
meillo@10 825 /* response to the DATA cmd */
meillo@10 826 if (ok) {
meillo@10 827 if (read_response(psb, SMTP_DATA_TIMEOUT)) {
meillo@10 828 if (check_response(psb, TRUE)) {
meillo@10 829 send_header(psb, hdr_list);
meillo@10 830 send_data(psb, msg);
meillo@10 831
meillo@10 832 if (read_response(psb, SMTP_FINAL_TIMEOUT))
meillo@10 833 ok = check_response(psb, FALSE);
meillo@10 834 }
meillo@10 835 }
meillo@10 836 }
meillo@0 837 }
meillo@10 838 }
meillo@10 839
meillo@10 840 DEBUG(5) {
meillo@10 841 debugf("psb->error = %d\n", psb->error);
meillo@10 842 debugf("ok = %d\n", ok);
meillo@10 843 debugf("rcpt_accept = %d\n", rcpt_accept);
meillo@10 844 }
meillo@10 845
meillo@10 846 if (psb->error == smtp_ok) {
meillo@10 847 GList *rcpt_node;
meillo@10 848 for (rcpt_node = g_list_first(rcpt_list); rcpt_node; rcpt_node = g_list_next(rcpt_node)) {
meillo@10 849 address *rcpt = (address *) (rcpt_node->data);
meillo@10 850 if (addr_is_delivered(rcpt))
meillo@10 851 logwrite(LOG_NOTICE, "%s => %s host=%s with %s\n", msg->uid, addr_string(rcpt),
meillo@10 852 psb->remote_host, psb->use_esmtp ? "esmtp" : "smtp");
meillo@0 853 }
meillo@10 854 } else {
meillo@10 855 /* if something went wrong,
meillo@10 856 we have to unmark the rcpts prematurely marked as delivered
meillo@10 857 and mark the status */
meillo@10 858 smtp_out_mark_rcpts(psb, rcpt_list);
meillo@10 859
meillo@10 860 /* log the failure: */
meillo@10 861 smtp_out_log_failure(psb, msg);
meillo@0 862 }
meillo@10 863 return rcpt_accept;
meillo@0 864 }
meillo@0 865
meillo@10 866 gboolean
meillo@10 867 smtp_out_quit(smtp_base * psb)
meillo@0 868 {
meillo@10 869 fprintf(psb->out, "QUIT\r\n");
meillo@10 870 fflush(psb->out);
meillo@0 871
meillo@10 872 DEBUG(4) debugf("QUIT\n");
meillo@0 873
meillo@10 874 signal(SIGALRM, SIG_DFL);
meillo@10 875
meillo@10 876 return TRUE;
meillo@0 877 }
meillo@10 878
meillo@10 879 gint
meillo@10 880 smtp_deliver(gchar * host, gint port, GList * resolve_list, message * msg, address * return_path, GList * rcpt_list)
meillo@0 881 {
meillo@10 882 smtp_base *psb;
meillo@10 883 smtp_error err;
meillo@0 884
meillo@10 885 DEBUG(5) debugf("smtp_deliver entered\n");
meillo@0 886
meillo@10 887 if (return_path == NULL)
meillo@10 888 return_path = msg->return_path;
meillo@0 889
meillo@10 890 if ((psb = smtp_out_open(host, port, resolve_list))) {
meillo@10 891 set_heloname(psb, return_path->domain, TRUE);
meillo@10 892 /* initiate connection, send message and quit: */
meillo@10 893 if (smtp_out_init(psb)) {
meillo@10 894 smtp_out_msg(psb, msg, return_path, rcpt_list, NULL);
meillo@10 895 if (psb->error == smtp_ok || (psb->error == smtp_fail) || (psb->error == smtp_trylater)
meillo@10 896 || (psb->error == smtp_syntax) || (psb->error == smtp_cancel))
meillo@10 897 smtp_out_quit(psb);
meillo@10 898 }
meillo@10 899
meillo@10 900 err = psb->error;
meillo@10 901 destroy_smtpbase(psb);
meillo@10 902
meillo@10 903 return err;
meillo@10 904 }
meillo@10 905 return -1;
meillo@0 906 }