1 /* $OpenBSD: enqueue.c,v 1.81 2014/06/06 15:02:08 gilles Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Henning Brauer <henning@bulabula.org> 5 * Copyright (c) 2009 Jacek Masiulaniec <jacekm@dobremiasto.net> 6 * Copyright (c) 2012 Gilles Chehade <gilles@poolp.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 17 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 18 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/types.h> 22 #include <sys/queue.h> 23 #include <sys/socket.h> 24 #include <sys/tree.h> 25 #include <sys/stat.h> 26 27 #include <ctype.h> 28 #include <err.h> 29 #include <errno.h> 30 #include <event.h> 31 #include <imsg.h> 32 #include <inttypes.h> 33 #include <pwd.h> 34 #include <stdarg.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <sysexits.h> 39 #include <time.h> 40 #include <unistd.h> 41 42 #include "smtpd.h" 43 44 extern struct imsgbuf *ibuf; 45 46 void usage(void); 47 static void build_from(char *, struct passwd *); 48 static int parse_message(FILE *, int, int, FILE *); 49 static void parse_addr(char *, size_t, int); 50 static void parse_addr_terminal(int); 51 static char *qualify_addr(char *); 52 static void rcpt_add(char *); 53 static int open_connection(void); 54 static void get_responses(FILE *, int); 55 static int send_line(FILE *, int, char *, ...); 56 static int enqueue_offline(int, char *[], FILE *); 57 58 extern int srv_connect(void); 59 60 enum headerfields { 61 HDR_NONE, 62 HDR_FROM, 63 HDR_TO, 64 HDR_CC, 65 HDR_BCC, 66 HDR_SUBJECT, 67 HDR_DATE, 68 HDR_MSGID, 69 HDR_MIME_VERSION, 70 HDR_CONTENT_TYPE, 71 HDR_CONTENT_DISPOSITION, 72 HDR_CONTENT_TRANSFER_ENCODING, 73 HDR_USER_AGENT 74 }; 75 76 struct { 77 char *word; 78 enum headerfields type; 79 } keywords[] = { 80 { "From:", HDR_FROM }, 81 { "To:", HDR_TO }, 82 { "Cc:", HDR_CC }, 83 { "Bcc:", HDR_BCC }, 84 { "Subject:", HDR_SUBJECT }, 85 { "Date:", HDR_DATE }, 86 { "Message-Id:", HDR_MSGID }, 87 { "MIME-Version:", HDR_MIME_VERSION }, 88 { "Content-Type:", HDR_CONTENT_TYPE }, 89 { "Content-Disposition:", HDR_CONTENT_DISPOSITION }, 90 { "Content-Transfer-Encoding:", HDR_CONTENT_TRANSFER_ENCODING }, 91 { "User-Agent:", HDR_USER_AGENT }, 92 }; 93 94 #define LINESPLIT 990 95 #define SMTP_LINELEN 1000 96 #define TIMEOUTMSG "Timeout\n" 97 98 #define WSP(c) (c == ' ' || c == '\t') 99 100 int verbose = 0; 101 char host[SMTPD_MAXHOSTNAMELEN]; 102 char *user = NULL; 103 time_t timestamp; 104 105 struct { 106 int fd; 107 char *from; 108 char *fromname; 109 char **rcpts; 110 char *dsn_notify; 111 char *dsn_ret; 112 char *dsn_envid; 113 int rcpt_cnt; 114 int need_linesplit; 115 int saw_date; 116 int saw_msgid; 117 int saw_from; 118 int saw_mime_version; 119 int saw_content_type; 120 int saw_content_disposition; 121 int saw_content_transfer_encoding; 122 int saw_user_agent; 123 } msg; 124 125 struct { 126 uint quote; 127 uint comment; 128 uint esc; 129 uint brackets; 130 size_t wpos; 131 char buf[SMTP_LINELEN]; 132 } pstate; 133 134 static void 135 qp_encoded_write(FILE *fp, char *buf, size_t len) 136 { 137 while (len) { 138 if (*buf == '=') 139 fprintf(fp, "=3D"); 140 else if (*buf == ' ' || *buf == '\t') { 141 char *p = buf; 142 143 while (*p != '\n') { 144 if (*p != ' ' && *p != '\t') 145 break; 146 p++; 147 } 148 if (*p == '\n') 149 fprintf(fp, "=%2X", *buf & 0xff); 150 else 151 fprintf(fp, "%c", *buf & 0xff); 152 } 153 else if (! isprint((unsigned char)*buf) && *buf != '\n') 154 fprintf(fp, "=%2X", *buf & 0xff); 155 else 156 fprintf(fp, "%c", *buf); 157 buf++; 158 len--; 159 } 160 } 161 162 static void 163 send_header(FILE *fout, const char *line, size_t len) 164 { 165 int i; 166 167 if (strncasecmp("To:", line, 3) != 0 && 168 strncasecmp("Cc:", line, 3) != 0 && 169 strncasecmp("Bcc:", line, 4) != 0 && 170 strncasecmp("From:", line, 5) != 0) { 171 send_line(fout, 0, "%.*s", (int)len, line); 172 return; 173 } 174 if (len >= sizeof pstate.buf) { 175 send_line(fout, 0, "%.*s", (int)len, line); 176 return; 177 } 178 179 /* XXX 180 * To, Cc and Bcc may need rewrite, we can reuse the 181 * msg recipients field since former content has already 182 * been used at this point. 183 */ 184 memset(&pstate, 0, sizeof(pstate)); 185 memcpy(pstate.buf, line, len); 186 pstate.buf[len] = 0; 187 pstate.wpos = len - 1; 188 msg.rcpts = NULL; 189 msg.rcpt_cnt = 0; 190 191 if (strncasecmp("From:", line, 5) == 0) { 192 parse_addr_terminal(1); 193 send_line(fout, 0, "%s\n", msg.from); 194 } 195 else { 196 parse_addr_terminal(0); 197 for (i = 0; i < msg.rcpt_cnt; ++i) 198 if (*msg.rcpts[i] != '\0') 199 send_line(fout, 0, "%s%s%s\n", i > 0 ? "\t" : "", 200 msg.rcpts[i], i < msg.rcpt_cnt - 1 ? "," : ""); 201 } 202 } 203 204 int 205 enqueue(int argc, char *argv[]) 206 { 207 int i, ch, tflag = 0, noheader; 208 char *fake_from = NULL, *buf; 209 struct passwd *pw; 210 FILE *fp, *fout; 211 size_t len, envid_sz = 0; 212 int fd; 213 char sfn[] = "/tmp/smtpd.XXXXXXXXXX"; 214 char *line; 215 int dotted; 216 int inheaders = 0; 217 int save_argc; 218 char **save_argv; 219 220 memset(&msg, 0, sizeof(msg)); 221 time(×tamp); 222 223 save_argc = argc; 224 save_argv = argv; 225 226 while ((ch = getopt(argc, argv, 227 "A:B:b:E::e:F:f:iJ::L:mN:o:p:qR:tvV:x")) != -1) { 228 switch (ch) { 229 case 'f': 230 fake_from = optarg; 231 break; 232 case 'F': 233 msg.fromname = optarg; 234 break; 235 case 'N': 236 msg.dsn_notify = optarg; 237 break; 238 case 'R': 239 msg.dsn_ret = optarg; 240 break; 241 case 't': 242 tflag = 1; 243 break; 244 case 'v': 245 verbose = 1; 246 break; 247 case 'V': 248 msg.dsn_envid = optarg; 249 break; 250 /* all remaining: ignored, sendmail compat */ 251 case 'A': 252 case 'B': 253 case 'b': 254 case 'E': 255 case 'e': 256 case 'i': 257 case 'L': 258 case 'm': 259 case 'o': 260 case 'p': 261 case 'x': 262 break; 263 case 'q': 264 /* XXX: implement "process all now" */ 265 return (EX_SOFTWARE); 266 default: 267 usage(); 268 } 269 } 270 271 argc -= optind; 272 argv += optind; 273 274 if (getmailname(host, sizeof(host)) == -1) 275 err(EX_NOHOST, "getmailname"); 276 if ((pw = getpwuid(getuid())) == NULL) 277 user = "anonymous"; 278 if (pw != NULL) 279 user = xstrdup(pw->pw_name, "enqueue"); 280 281 build_from(fake_from, pw); 282 283 while (argc > 0) { 284 rcpt_add(argv[0]); 285 argv++; 286 argc--; 287 } 288 289 if ((fd = mkstemp(sfn)) == -1 || 290 (fp = fdopen(fd, "w+")) == NULL) { 291 if (fd != -1) { 292 unlink(sfn); 293 close(fd); 294 } 295 err(EX_UNAVAILABLE, "mkstemp"); 296 } 297 unlink(sfn); 298 noheader = parse_message(stdin, fake_from == NULL, tflag, fp); 299 300 if (msg.rcpt_cnt == 0) 301 errx(EX_SOFTWARE, "no recipients"); 302 303 /* init session */ 304 rewind(fp); 305 306 /* try to connect */ 307 /* If the server is not running, enqueue the message offline */ 308 309 if (!srv_connect()) 310 return (enqueue_offline(save_argc, save_argv, fp)); 311 312 if ((msg.fd = open_connection()) == -1) 313 errx(EX_UNAVAILABLE, "server too busy"); 314 315 fout = fdopen(msg.fd, "a+"); 316 if (fout == NULL) 317 err(EX_UNAVAILABLE, "fdopen"); 318 319 /* 320 * We need to call get_responses after every command because we don't 321 * support PIPELINING on the server-side yet. 322 */ 323 324 /* banner */ 325 get_responses(fout, 1); 326 327 send_line(fout, verbose, "EHLO localhost\n"); 328 get_responses(fout, 1); 329 330 if (msg.dsn_envid != NULL) 331 envid_sz = strlen(msg.dsn_envid); 332 333 send_line(fout, verbose, "MAIL FROM:<%s> %s%s %s%s\n", 334 msg.from, 335 msg.dsn_ret ? "RET=" : "", 336 msg.dsn_ret ? msg.dsn_ret : "", 337 envid_sz ? "ENVID=" : "", 338 envid_sz ? msg.dsn_envid : ""); 339 get_responses(fout, 1); 340 341 for (i = 0; i < msg.rcpt_cnt; i++) { 342 send_line(fout, verbose, "RCPT TO:<%s> %s%s\n", 343 msg.rcpts[i], 344 msg.dsn_notify ? "NOTIFY=" : "", 345 msg.dsn_notify ? msg.dsn_notify : ""); 346 get_responses(fout, 1); 347 } 348 349 send_line(fout, verbose, "DATA\n"); 350 get_responses(fout, 1); 351 352 /* add From */ 353 if (!msg.saw_from) 354 send_line(fout, 0, "From: %s%s<%s>\n", 355 msg.fromname ? msg.fromname : "", 356 msg.fromname ? " " : "", 357 msg.from); 358 359 /* add Date */ 360 if (!msg.saw_date) 361 send_line(fout, 0, "Date: %s\n", time_to_text(timestamp)); 362 363 /* add Message-Id */ 364 if (!msg.saw_msgid) 365 send_line(fout, 0, "Message-Id: <%"PRIu64".enqueue@%s>\n", 366 generate_uid(), host); 367 368 if (msg.need_linesplit) { 369 /* we will always need to mime encode for long lines */ 370 if (!msg.saw_mime_version) 371 send_line(fout, 0, "MIME-Version: 1.0\n"); 372 if (!msg.saw_content_type) 373 send_line(fout, 0, "Content-Type: text/plain; " 374 "charset=unknown-8bit\n"); 375 if (!msg.saw_content_disposition) 376 send_line(fout, 0, "Content-Disposition: inline\n"); 377 if (!msg.saw_content_transfer_encoding) 378 send_line(fout, 0, "Content-Transfer-Encoding: " 379 "quoted-printable\n"); 380 } 381 382 /* add separating newline */ 383 if (noheader) 384 send_line(fout, 0, "\n"); 385 else 386 inheaders = 1; 387 388 for (;;) { 389 buf = fgetln(fp, &len); 390 if (buf == NULL && ferror(fp)) 391 err(EX_UNAVAILABLE, "fgetln"); 392 if (buf == NULL && feof(fp)) 393 break; 394 /* newlines have been normalized on first parsing */ 395 if (buf[len-1] != '\n') 396 errx(EX_SOFTWARE, "expect EOL"); 397 398 dotted = 0; 399 if (buf[0] == '.') { 400 fputc('.', fout); 401 dotted = 1; 402 } 403 404 line = buf; 405 406 if (msg.saw_content_transfer_encoding || noheader || 407 inheaders || !msg.need_linesplit) { 408 if (inheaders) 409 send_header(fout, line, len); 410 else 411 send_line(fout, 0, "%.*s", (int)len, line); 412 if (inheaders && buf[0] == '\n') 413 inheaders = 0; 414 continue; 415 } 416 417 /* we don't have a content transfer encoding, use our default */ 418 do { 419 if (len < LINESPLIT) { 420 qp_encoded_write(fout, line, len); 421 break; 422 } 423 else { 424 qp_encoded_write(fout, line, 425 LINESPLIT - 2 - dotted); 426 send_line(fout, 0, "=\n"); 427 line += LINESPLIT - 2 - dotted; 428 len -= LINESPLIT - 2 - dotted; 429 } 430 } while (len); 431 } 432 send_line(fout, verbose, ".\n"); 433 get_responses(fout, 1); 434 435 send_line(fout, verbose, "QUIT\n"); 436 get_responses(fout, 1); 437 438 fclose(fp); 439 fclose(fout); 440 441 exit(EX_OK); 442 } 443 444 static void 445 get_responses(FILE *fin, int n) 446 { 447 char *buf; 448 size_t len; 449 int e; 450 451 fflush(fin); 452 if ((e = ferror(fin))) 453 errx(1, "ferror: %d", e); 454 455 while (n) { 456 buf = fgetln(fin, &len); 457 if (buf == NULL && ferror(fin)) 458 err(1, "fgetln"); 459 if (buf == NULL && feof(fin)) 460 break; 461 if (buf == NULL || len < 1) 462 err(1, "fgetln weird"); 463 464 /* account for \r\n linebreaks */ 465 if (len >= 2 && buf[len - 2] == '\r' && buf[len - 1] == '\n') 466 buf[--len - 1] = '\n'; 467 468 if (len < 4) 469 errx(1, "bad response"); 470 471 if (verbose) 472 printf("<<< %.*s", (int)len, buf); 473 474 if (buf[3] == '-') 475 continue; 476 if (buf[0] != '2' && buf[0] != '3') 477 errx(1, "command failed: %.*s", (int)len, buf); 478 n--; 479 } 480 } 481 482 static int 483 send_line(FILE *fp, int v, char *fmt, ...) 484 { 485 int ret; 486 va_list ap; 487 488 va_start(ap, fmt); 489 ret = vfprintf(fp, fmt, ap); 490 va_end(ap); 491 492 if (v) { 493 va_start(ap, fmt); 494 printf(">>> "); 495 ret = vprintf(fmt, ap); 496 va_end(ap); 497 } 498 499 return (ret); 500 } 501 502 static void 503 build_from(char *fake_from, struct passwd *pw) 504 { 505 char *p; 506 507 if (fake_from == NULL) 508 msg.from = qualify_addr(user); 509 else { 510 if (fake_from[0] == '<') { 511 if (fake_from[strlen(fake_from) - 1] != '>') 512 errx(1, "leading < but no trailing >"); 513 fake_from[strlen(fake_from) - 1] = 0; 514 p = xstrdup(fake_from + 1, "build_from"); 515 516 msg.from = qualify_addr(p); 517 free(p); 518 } else 519 msg.from = qualify_addr(fake_from); 520 } 521 522 if (msg.fromname == NULL && fake_from == NULL && pw != NULL) { 523 int len, apos; 524 525 len = strcspn(pw->pw_gecos, ","); 526 if ((p = memchr(pw->pw_gecos, '&', len))) { 527 apos = p - pw->pw_gecos; 528 if (asprintf(&msg.fromname, "%.*s%s%.*s", 529 apos, pw->pw_gecos, 530 pw->pw_name, 531 len - apos - 1, p + 1) == -1) 532 err(1, NULL); 533 msg.fromname[apos] = toupper((unsigned char)msg.fromname[apos]); 534 } else { 535 if (asprintf(&msg.fromname, "%.*s", len, 536 pw->pw_gecos) == -1) 537 err(1, NULL); 538 } 539 } 540 } 541 542 static int 543 parse_message(FILE *fin, int get_from, int tflag, FILE *fout) 544 { 545 char *buf; 546 size_t len; 547 uint i, cur = HDR_NONE; 548 uint header_seen = 0, header_done = 0; 549 550 memset(&pstate, 0, sizeof(pstate)); 551 for (;;) { 552 buf = fgetln(fin, &len); 553 if (buf == NULL && ferror(fin)) 554 err(1, "fgetln"); 555 if (buf == NULL && feof(fin)) 556 break; 557 if (buf == NULL || len < 1) 558 err(1, "fgetln weird"); 559 560 /* account for \r\n linebreaks */ 561 if (len >= 2 && buf[len - 2] == '\r' && buf[len - 1] == '\n') 562 buf[--len - 1] = '\n'; 563 564 if (len == 1 && buf[0] == '\n') /* end of header */ 565 header_done = 1; 566 567 if (!WSP(buf[0])) { /* whitespace -> continuation */ 568 if (cur == HDR_FROM) 569 parse_addr_terminal(1); 570 if (cur == HDR_TO || cur == HDR_CC || cur == HDR_BCC) 571 parse_addr_terminal(0); 572 cur = HDR_NONE; 573 } 574 575 /* not really exact, if we are still in headers */ 576 if (len + (buf[len - 1] == '\n' ? 0 : 1) >= LINESPLIT) 577 msg.need_linesplit = 1; 578 579 for (i = 0; !header_done && cur == HDR_NONE && 580 i < nitems(keywords); i++) 581 if (len > strlen(keywords[i].word) && 582 !strncasecmp(buf, keywords[i].word, 583 strlen(keywords[i].word))) 584 cur = keywords[i].type; 585 586 if (cur != HDR_NONE) 587 header_seen = 1; 588 589 if (cur != HDR_BCC) { 590 send_line(fout, 0, "%.*s", (int)len, buf); 591 if (buf[len - 1] != '\n') 592 fputc('\n', fout); 593 if (ferror(fout)) 594 err(1, "write error"); 595 } 596 597 /* 598 * using From: as envelope sender is not sendmail compatible, 599 * but I really want it that way - maybe needs a knob 600 */ 601 if (cur == HDR_FROM) { 602 msg.saw_from++; 603 if (get_from) 604 parse_addr(buf, len, 1); 605 } 606 607 if (tflag && (cur == HDR_TO || cur == HDR_CC || cur == HDR_BCC)) 608 parse_addr(buf, len, 0); 609 610 if (cur == HDR_DATE) 611 msg.saw_date++; 612 if (cur == HDR_MSGID) 613 msg.saw_msgid++; 614 if (cur == HDR_MIME_VERSION) 615 msg.saw_mime_version = 1; 616 if (cur == HDR_CONTENT_TYPE) 617 msg.saw_content_type = 1; 618 if (cur == HDR_CONTENT_DISPOSITION) 619 msg.saw_content_disposition = 1; 620 if (cur == HDR_CONTENT_TRANSFER_ENCODING) 621 msg.saw_content_transfer_encoding = 1; 622 if (cur == HDR_USER_AGENT) 623 msg.saw_user_agent = 1; 624 } 625 626 return (!header_seen); 627 } 628 629 static void 630 parse_addr(char *s, size_t len, int is_from) 631 { 632 size_t pos = 0; 633 int terminal = 0; 634 635 /* unless this is a continuation... */ 636 if (!WSP(s[pos]) && s[pos] != ',' && s[pos] != ';') { 637 /* ... skip over everything before the ':' */ 638 for (; pos < len && s[pos] != ':'; pos++) 639 ; /* nothing */ 640 /* ... and check & reset parser state */ 641 parse_addr_terminal(is_from); 642 } 643 644 /* skip over ':' ',' ';' and whitespace */ 645 for (; pos < len && !pstate.quote && (WSP(s[pos]) || s[pos] == ':' || 646 s[pos] == ',' || s[pos] == ';'); pos++) 647 ; /* nothing */ 648 649 for (; pos < len; pos++) { 650 if (!pstate.esc && !pstate.quote && s[pos] == '(') 651 pstate.comment++; 652 if (!pstate.comment && !pstate.esc && s[pos] == '"') 653 pstate.quote = !pstate.quote; 654 655 if (!pstate.comment && !pstate.quote && !pstate.esc) { 656 if (s[pos] == ':') { /* group */ 657 for (pos++; pos < len && WSP(s[pos]); pos++) 658 ; /* nothing */ 659 pstate.wpos = 0; 660 } 661 if (s[pos] == '\n' || s[pos] == '\r') 662 break; 663 if (s[pos] == ',' || s[pos] == ';') { 664 terminal = 1; 665 break; 666 } 667 if (s[pos] == '<') { 668 pstate.brackets = 1; 669 pstate.wpos = 0; 670 } 671 if (pstate.brackets && s[pos] == '>') 672 terminal = 1; 673 } 674 675 if (!pstate.comment && !terminal && (!(!(pstate.quote || 676 pstate.esc) && (s[pos] == '<' || WSP(s[pos]))))) { 677 if (pstate.wpos >= sizeof(pstate.buf)) 678 errx(1, "address exceeds buffer size"); 679 pstate.buf[pstate.wpos++] = s[pos]; 680 } 681 682 if (!pstate.quote && pstate.comment && s[pos] == ')') 683 pstate.comment--; 684 685 if (!pstate.esc && !pstate.comment && !pstate.quote && 686 s[pos] == '\\') 687 pstate.esc = 1; 688 else 689 pstate.esc = 0; 690 } 691 692 if (terminal) 693 parse_addr_terminal(is_from); 694 695 for (; pos < len && (s[pos] == '\r' || s[pos] == '\n'); pos++) 696 ; /* nothing */ 697 698 if (pos < len) 699 parse_addr(s + pos, len - pos, is_from); 700 } 701 702 static void 703 parse_addr_terminal(int is_from) 704 { 705 if (pstate.comment || pstate.quote || pstate.esc) 706 errx(1, "syntax error in address"); 707 if (pstate.wpos) { 708 if (pstate.wpos >= sizeof(pstate.buf)) 709 errx(1, "address exceeds buffer size"); 710 pstate.buf[pstate.wpos] = '\0'; 711 if (is_from) 712 msg.from = qualify_addr(pstate.buf); 713 else 714 rcpt_add(pstate.buf); 715 pstate.wpos = 0; 716 } 717 } 718 719 static char * 720 qualify_addr(char *in) 721 { 722 char *out; 723 724 if (strlen(in) > 0 && strchr(in, '@') == NULL) { 725 if (asprintf(&out, "%s@%s", in, host) == -1) 726 err(1, "qualify asprintf"); 727 } else 728 out = xstrdup(in, "qualify_addr"); 729 730 return (out); 731 } 732 733 static void 734 rcpt_add(char *addr) 735 { 736 void *nrcpts; 737 char *p; 738 int n; 739 740 n = 1; 741 p = addr; 742 while ((p = strchr(p, ',')) != NULL) { 743 n++; 744 p++; 745 } 746 747 if ((nrcpts = realloc(msg.rcpts, 748 sizeof(char *) * (msg.rcpt_cnt + n))) == NULL) 749 err(1, "rcpt_add realloc"); 750 msg.rcpts = nrcpts; 751 752 while (n--) { 753 if ((p = strchr(addr, ',')) != NULL) 754 *p++ = '\0'; 755 msg.rcpts[msg.rcpt_cnt++] = qualify_addr(addr); 756 if (p == NULL) 757 break; 758 addr = p; 759 } 760 } 761 762 static int 763 open_connection(void) 764 { 765 struct imsg imsg; 766 int fd; 767 int n; 768 769 imsg_compose(ibuf, IMSG_CTL_SMTP_SESSION, IMSG_VERSION, 0, -1, NULL, 0); 770 771 while (ibuf->w.queued) 772 if (msgbuf_write(&ibuf->w) < 0 && errno != EAGAIN) 773 err(1, "write error"); 774 775 while (1) { 776 if ((n = imsg_read(ibuf)) == -1) 777 errx(1, "imsg_read error"); 778 if (n == 0) 779 errx(1, "pipe closed"); 780 781 if ((n = imsg_get(ibuf, &imsg)) == -1) 782 errx(1, "imsg_get error"); 783 if (n == 0) 784 continue; 785 786 switch (imsg.hdr.type) { 787 case IMSG_CTL_OK: 788 break; 789 case IMSG_CTL_FAIL: 790 errx(1, "server disallowed submission request"); 791 default: 792 errx(1, "unexpected imsg reply type"); 793 } 794 795 fd = imsg.fd; 796 imsg_free(&imsg); 797 798 break; 799 } 800 801 return fd; 802 } 803 804 static int 805 enqueue_offline(int argc, char *argv[], FILE *ifile) 806 { 807 char path[SMTPD_MAXPATHLEN]; 808 FILE *fp; 809 int i, fd, ch; 810 mode_t omode; 811 812 if (ckdir(PATH_SPOOL PATH_OFFLINE, 01777, 0, 0, 0) == 0) 813 errx(EX_UNAVAILABLE, "error in offline directory setup"); 814 815 if (! bsnprintf(path, sizeof(path), "%s%s/%lld.XXXXXXXXXX", PATH_SPOOL, 816 PATH_OFFLINE, (long long int) time(NULL))) 817 err(EX_UNAVAILABLE, "snprintf"); 818 819 omode = umask(7077); 820 if ((fd = mkstemp(path)) == -1 || (fp = fdopen(fd, "w+")) == NULL) { 821 warn("cannot create temporary file %s", path); 822 if (fd != -1) 823 unlink(path); 824 exit(EX_UNAVAILABLE); 825 } 826 umask(omode); 827 828 if (fchmod(fd, 0600) == -1) { 829 unlink(path); 830 exit(EX_SOFTWARE); 831 } 832 833 for (i = 1; i < argc; i++) { 834 if (strchr(argv[i], '|') != NULL) { 835 warnx("%s contains illegal character", argv[i]); 836 unlink(path); 837 exit(EX_SOFTWARE); 838 } 839 fprintf(fp, "%s%s", i == 1 ? "" : "|", argv[i]); 840 } 841 842 fprintf(fp, "\n"); 843 844 while ((ch = fgetc(ifile)) != EOF) 845 if (fputc(ch, fp) == EOF) { 846 warn("write error"); 847 unlink(path); 848 exit(EX_UNAVAILABLE); 849 } 850 851 if (ferror(ifile)) { 852 warn("read error"); 853 unlink(path); 854 exit(EX_UNAVAILABLE); 855 } 856 857 fclose(fp); 858 859 return (EX_TEMPFAIL); 860 } 861