1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 # include "sendmail.h" 10 11 #ifndef lint 12 #ifdef SMTP 13 static char sccsid[] = "@(#)usersmtp.c 8.44 (Berkeley) 04/07/95 (with SMTP)"; 14 #else 15 static char sccsid[] = "@(#)usersmtp.c 8.44 (Berkeley) 04/07/95 (without SMTP)"; 16 #endif 17 #endif /* not lint */ 18 19 # include <sysexits.h> 20 # include <errno.h> 21 22 # ifdef SMTP 23 24 /* 25 ** USERSMTP -- run SMTP protocol from the user end. 26 ** 27 ** This protocol is described in RFC821. 28 */ 29 30 #define REPLYTYPE(r) ((r) / 100) /* first digit of reply code */ 31 #define REPLYCLASS(r) (((r) / 10) % 10) /* second digit of reply code */ 32 #define SMTPCLOSING 421 /* "Service Shutting Down" */ 33 34 char SmtpMsgBuffer[MAXLINE]; /* buffer for commands */ 35 char SmtpReplyBuffer[MAXLINE]; /* buffer for replies */ 36 char SmtpError[MAXLINE] = ""; /* save failure error messages */ 37 int SmtpPid; /* pid of mailer */ 38 bool SmtpNeedIntro; /* need "while talking" in transcript */ 39 40 #ifdef __STDC__ 41 extern smtpmessage(char *f, MAILER *m, MCI *mci, ...); 42 #endif 43 /* 44 ** SMTPINIT -- initialize SMTP. 45 ** 46 ** Opens the connection and sends the initial protocol. 47 ** 48 ** Parameters: 49 ** m -- mailer to create connection to. 50 ** pvp -- pointer to parameter vector to pass to 51 ** the mailer. 52 ** 53 ** Returns: 54 ** none. 55 ** 56 ** Side Effects: 57 ** creates connection and sends initial protocol. 58 */ 59 60 smtpinit(m, mci, e) 61 struct mailer *m; 62 register MCI *mci; 63 ENVELOPE *e; 64 { 65 register int r; 66 register char *p; 67 extern void esmtp_check(); 68 extern void helo_options(); 69 70 if (tTd(18, 1)) 71 { 72 printf("smtpinit "); 73 mci_dump(mci, FALSE); 74 } 75 76 /* 77 ** Open the connection to the mailer. 78 */ 79 80 SmtpError[0] = '\0'; 81 CurHostName = mci->mci_host; /* XXX UGLY XXX */ 82 if (CurHostName == NULL) 83 CurHostName = MyHostName; 84 SmtpNeedIntro = TRUE; 85 switch (mci->mci_state) 86 { 87 case MCIS_ACTIVE: 88 /* need to clear old information */ 89 smtprset(m, mci, e); 90 /* fall through */ 91 92 case MCIS_OPEN: 93 return; 94 95 case MCIS_ERROR: 96 case MCIS_SSD: 97 /* shouldn't happen */ 98 smtpquit(m, mci, e); 99 /* fall through */ 100 101 case MCIS_CLOSED: 102 syserr("451 smtpinit: state CLOSED"); 103 return; 104 105 case MCIS_OPENING: 106 break; 107 } 108 109 mci->mci_state = MCIS_OPENING; 110 111 /* 112 ** Get the greeting message. 113 ** This should appear spontaneously. Give it five minutes to 114 ** happen. 115 */ 116 117 SmtpPhase = mci->mci_phase = "client greeting"; 118 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 119 r = reply(m, mci, e, TimeOuts.to_initial, esmtp_check); 120 if (r < 0 || REPLYTYPE(r) == 4) 121 goto tempfail1; 122 if (REPLYTYPE(r) != 2) 123 goto unavailable; 124 125 /* 126 ** Send the HELO command. 127 ** My mother taught me to always introduce myself. 128 */ 129 130 if (bitnset(M_ESMTP, m->m_flags)) 131 mci->mci_flags |= MCIF_ESMTP; 132 133 tryhelo: 134 if (bitset(MCIF_ESMTP, mci->mci_flags)) 135 { 136 smtpmessage("EHLO %s", m, mci, MyHostName); 137 SmtpPhase = mci->mci_phase = "client EHLO"; 138 } 139 else 140 { 141 smtpmessage("HELO %s", m, mci, MyHostName); 142 SmtpPhase = mci->mci_phase = "client HELO"; 143 } 144 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 145 r = reply(m, mci, e, TimeOuts.to_helo, helo_options); 146 if (r < 0) 147 goto tempfail1; 148 else if (REPLYTYPE(r) == 5) 149 { 150 if (bitset(MCIF_ESMTP, mci->mci_flags)) 151 { 152 /* try old SMTP instead */ 153 mci->mci_flags &= ~MCIF_ESMTP; 154 goto tryhelo; 155 } 156 goto unavailable; 157 } 158 else if (REPLYTYPE(r) != 2) 159 goto tempfail1; 160 161 /* 162 ** Check to see if we actually ended up talking to ourself. 163 ** This means we didn't know about an alias or MX, or we managed 164 ** to connect to an echo server. 165 */ 166 167 p = strchr(&SmtpReplyBuffer[4], ' '); 168 if (p != NULL) 169 *p = '\0'; 170 if (!bitnset(M_NOLOOPCHECK, m->m_flags) && 171 strcasecmp(&SmtpReplyBuffer[4], MyHostName) == 0) 172 { 173 syserr("553 %s config error: mail loops back to myself", 174 MyHostName); 175 mci->mci_exitstat = EX_CONFIG; 176 mci->mci_errno = 0; 177 smtpquit(m, mci, e); 178 return; 179 } 180 181 /* 182 ** If this is expected to be another sendmail, send some internal 183 ** commands. 184 */ 185 186 if (bitnset(M_INTERNAL, m->m_flags)) 187 { 188 /* tell it to be verbose */ 189 smtpmessage("VERB", m, mci); 190 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 191 if (r < 0) 192 goto tempfail2; 193 } 194 195 if (mci->mci_state != MCIS_CLOSED) 196 { 197 mci->mci_state = MCIS_OPEN; 198 return; 199 } 200 201 /* got a 421 error code during startup */ 202 203 tempfail1: 204 tempfail2: 205 mci->mci_exitstat = EX_TEMPFAIL; 206 if (mci->mci_errno == 0) 207 mci->mci_errno = errno; 208 if (mci->mci_state != MCIS_CLOSED) 209 smtpquit(m, mci, e); 210 return; 211 212 unavailable: 213 mci->mci_exitstat = EX_UNAVAILABLE; 214 mci->mci_errno = errno; 215 smtpquit(m, mci, e); 216 return; 217 } 218 /* 219 ** ESMTP_CHECK -- check to see if this implementation likes ESMTP protocol 220 ** 221 ** Parameters: 222 ** line -- the response line. 223 ** firstline -- set if this is the first line of the reply. 224 ** m -- the mailer. 225 ** mci -- the mailer connection info. 226 ** e -- the envelope. 227 ** 228 ** Returns: 229 ** none. 230 */ 231 232 void 233 esmtp_check(line, firstline, m, mci, e) 234 char *line; 235 bool firstline; 236 MAILER *m; 237 register MCI *mci; 238 ENVELOPE *e; 239 { 240 register char *l; 241 242 for (l = line; (l = strchr(++l, 'E')) != NULL; ) 243 { 244 if (strncmp(l, "ESMTP ", 6) == 0) 245 { 246 mci->mci_flags |= MCIF_ESMTP; 247 break; 248 } 249 } 250 for (l = line; (l = strchr(++l, '8')) != NULL; ) 251 { 252 if (strncmp(l, "8BIT OK", 7) == 0) 253 { 254 mci->mci_flags |= MCIF_8BITOK; 255 break; 256 } 257 } 258 } 259 /* 260 ** HELO_OPTIONS -- process the options on a HELO line. 261 ** 262 ** Parameters: 263 ** line -- the response line. 264 ** firstline -- set if this is the first line of the reply. 265 ** m -- the mailer. 266 ** mci -- the mailer connection info. 267 ** e -- the envelope. 268 ** 269 ** Returns: 270 ** none. 271 */ 272 273 void 274 helo_options(line, firstline, m, mci, e) 275 char *line; 276 bool firstline; 277 MAILER *m; 278 register MCI *mci; 279 ENVELOPE *e; 280 { 281 register char *p; 282 283 if (firstline) 284 return; 285 286 if (strlen(line) < (SIZE_T) 5) 287 return; 288 line += 4; 289 p = strchr(line, ' '); 290 if (p != NULL) 291 *p++ = '\0'; 292 if (strcasecmp(line, "size") == 0) 293 { 294 mci->mci_flags |= MCIF_SIZE; 295 if (p != NULL) 296 mci->mci_maxsize = atol(p); 297 } 298 else if (strcasecmp(line, "8bitmime") == 0) 299 { 300 mci->mci_flags |= MCIF_8BITMIME; 301 mci->mci_flags &= ~MCIF_7BIT; 302 } 303 else if (strcasecmp(line, "expn") == 0) 304 mci->mci_flags |= MCIF_EXPN; 305 else if (strcasecmp(line, "x-dsn-03") == 0) 306 mci->mci_flags |= MCIF_DSN; 307 } 308 /* 309 ** SMTPMAILFROM -- send MAIL command 310 ** 311 ** Parameters: 312 ** m -- the mailer. 313 ** mci -- the mailer connection structure. 314 ** e -- the envelope (including the sender to specify). 315 */ 316 317 smtpmailfrom(m, mci, e) 318 struct mailer *m; 319 MCI *mci; 320 ENVELOPE *e; 321 { 322 int r; 323 char *bufp; 324 char *bodytype; 325 char buf[MAXNAME + 1]; 326 char optbuf[MAXLINE]; 327 328 if (tTd(18, 2)) 329 printf("smtpmailfrom: CurHost=%s\n", CurHostName); 330 331 /* set up appropriate options to include */ 332 if (bitset(MCIF_SIZE, mci->mci_flags) && e->e_msgsize > 0) 333 sprintf(optbuf, " SIZE=%ld", e->e_msgsize); 334 else 335 strcpy(optbuf, ""); 336 337 bodytype = e->e_bodytype; 338 if (bitset(MCIF_8BITMIME, mci->mci_flags)) 339 { 340 if (bodytype == NULL && 341 bitset(MM_MIME8BIT, MimeMode) && 342 bitset(EF_HAS8BIT, e->e_flags) && 343 !bitnset(M_8BITS, m->m_flags)) 344 bodytype = "8BITMIME"; 345 if (bodytype != NULL) 346 { 347 strcat(optbuf, " BODY="); 348 strcat(optbuf, bodytype); 349 } 350 } 351 else if (bitnset(M_8BITS, m->m_flags) || 352 !bitset(EF_HAS8BIT, e->e_flags) || 353 (e->e_bodytype != NULL && 354 strcasecmp(e->e_bodytype, "7bit") == 0)) 355 { 356 /* just pass it through */ 357 } 358 else if (bitset(MM_CVTMIME, MimeMode) && 359 (e->e_bodytype != NULL || !bitset(MM_PASS8BIT, MimeMode))) 360 { 361 /* must convert from 8bit MIME format to 7bit encoded */ 362 mci->mci_flags |= MCIF_CVT8TO7; 363 } 364 else if (!bitset(MM_PASS8BIT, MimeMode)) 365 { 366 /* cannot just send a 8-bit version */ 367 usrerr("%s does not support 8BITMIME", mci->mci_host); 368 return EX_DATAERR; 369 } 370 371 if (bitset(MCIF_DSN, mci->mci_flags)) 372 { 373 if (e->e_envid != NULL) 374 { 375 strcat(optbuf, " ENVID="); 376 strcat(optbuf, e->e_envid); 377 } 378 379 /* RET= parameter */ 380 if (bitset(EF_RET_PARAM, e->e_flags)) 381 { 382 strcat(optbuf, " RET="); 383 if (bitset(EF_NO_BODY_RETN, e->e_flags)) 384 strcat(optbuf, "HDRS"); 385 else 386 strcat(optbuf, "FULL"); 387 } 388 } 389 390 /* 391 ** Send the MAIL command. 392 ** Designates the sender. 393 */ 394 395 mci->mci_state = MCIS_ACTIVE; 396 397 if (bitset(EF_RESPONSE, e->e_flags) && 398 !bitnset(M_NO_NULL_FROM, m->m_flags)) 399 (void) strcpy(buf, ""); 400 else 401 expand("\201g", buf, sizeof buf, e); 402 if (buf[0] == '<') 403 { 404 /* strip off <angle brackets> (put back on below) */ 405 bufp = &buf[strlen(buf) - 1]; 406 if (*bufp == '>') 407 *bufp = '\0'; 408 bufp = &buf[1]; 409 } 410 else 411 bufp = buf; 412 if (bitnset(M_LOCALMAILER, e->e_from.q_mailer->m_flags) || 413 !bitnset(M_FROMPATH, m->m_flags)) 414 { 415 smtpmessage("MAIL From:<%s>%s", m, mci, bufp, optbuf); 416 } 417 else 418 { 419 smtpmessage("MAIL From:<@%s%c%s>%s", m, mci, MyHostName, 420 *bufp == '@' ? ',' : ':', bufp, optbuf); 421 } 422 SmtpPhase = mci->mci_phase = "client MAIL"; 423 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 424 r = reply(m, mci, e, TimeOuts.to_mail, NULL); 425 if (r < 0 || REPLYTYPE(r) == 4) 426 { 427 mci->mci_exitstat = EX_TEMPFAIL; 428 mci->mci_errno = errno; 429 smtpquit(m, mci, e); 430 return EX_TEMPFAIL; 431 } 432 else if (r == 250) 433 { 434 return EX_OK; 435 } 436 else if (r == 501 || r == 553) 437 { 438 /* syntax error in arguments */ 439 smtpquit(m, mci, e); 440 return EX_DATAERR; 441 } 442 else if (r == 552) 443 { 444 /* signal service unavailable */ 445 smtpquit(m, mci, e); 446 return EX_UNAVAILABLE; 447 } 448 449 #ifdef LOG 450 if (LogLevel > 1) 451 { 452 syslog(LOG_CRIT, "%s: %s: SMTP MAIL protocol error: %s", 453 e->e_id, mci->mci_host, SmtpReplyBuffer); 454 } 455 #endif 456 457 /* protocol error -- close up */ 458 smtpquit(m, mci, e); 459 return EX_PROTOCOL; 460 } 461 /* 462 ** SMTPRCPT -- designate recipient. 463 ** 464 ** Parameters: 465 ** to -- address of recipient. 466 ** m -- the mailer we are sending to. 467 ** mci -- the connection info for this transaction. 468 ** e -- the envelope for this transaction. 469 ** 470 ** Returns: 471 ** exit status corresponding to recipient status. 472 ** 473 ** Side Effects: 474 ** Sends the mail via SMTP. 475 */ 476 477 smtprcpt(to, m, mci, e) 478 ADDRESS *to; 479 register MAILER *m; 480 MCI *mci; 481 ENVELOPE *e; 482 { 483 register int r; 484 char optbuf[MAXLINE]; 485 486 strcpy(optbuf, ""); 487 if (bitset(MCIF_DSN, mci->mci_flags)) 488 { 489 /* NOTIFY= parameter */ 490 if (bitset(QHASNOTIFY, to->q_flags) && 491 bitset(QPRIMARY, to->q_flags)) 492 { 493 bool firstone = TRUE; 494 495 strcat(optbuf, " NOTIFY="); 496 if (bitset(QPINGONSUCCESS, to->q_flags)) 497 { 498 strcat(optbuf, "SUCCESS"); 499 firstone = FALSE; 500 } 501 if (bitset(QPINGONFAILURE, to->q_flags)) 502 { 503 if (!firstone) 504 strcat(optbuf, ","); 505 strcat(optbuf, "FAILURE"); 506 firstone = FALSE; 507 } 508 if (bitset(QPINGONDELAY, to->q_flags)) 509 { 510 if (!firstone) 511 strcat(optbuf, ","); 512 strcat(optbuf, "DELAY"); 513 firstone = FALSE; 514 } 515 if (firstone) 516 strcat(optbuf, "NEVER"); 517 } 518 519 /* ORCPT= parameter */ 520 if (to->q_orcpt != NULL) 521 { 522 strcat(optbuf, " ORCPT="); 523 strcat(optbuf, to->q_orcpt); 524 } 525 } 526 527 smtpmessage("RCPT To:<%s>%s", m, mci, to->q_user, optbuf); 528 529 SmtpPhase = mci->mci_phase = "client RCPT"; 530 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 531 r = reply(m, mci, e, TimeOuts.to_rcpt, NULL); 532 setstatus(to, SmtpReplyBuffer); 533 if (r < 0 || REPLYTYPE(r) == 4) 534 return (EX_TEMPFAIL); 535 else if (REPLYTYPE(r) == 2) 536 return (EX_OK); 537 else if (r == 550 || r == 551 || r == 553) 538 return (EX_NOUSER); 539 else if (r == 552 || r == 554) 540 return (EX_UNAVAILABLE); 541 542 #ifdef LOG 543 if (LogLevel > 1) 544 { 545 syslog(LOG_CRIT, "%s: %s: SMTP RCPT protocol error: %s", 546 e->e_id, mci->mci_host, SmtpReplyBuffer); 547 } 548 #endif 549 550 return (EX_PROTOCOL); 551 } 552 /* 553 ** SMTPDATA -- send the data and clean up the transaction. 554 ** 555 ** Parameters: 556 ** m -- mailer being sent to. 557 ** e -- the envelope for this message. 558 ** 559 ** Returns: 560 ** exit status corresponding to DATA command. 561 ** 562 ** Side Effects: 563 ** none. 564 */ 565 566 static jmp_buf CtxDataTimeout; 567 static void datatimeout(); 568 569 smtpdata(m, mci, e) 570 struct mailer *m; 571 register MCI *mci; 572 register ENVELOPE *e; 573 { 574 register int r; 575 register EVENT *ev; 576 time_t timeout; 577 578 /* 579 ** Send the data. 580 ** First send the command and check that it is ok. 581 ** Then send the data. 582 ** Follow it up with a dot to terminate. 583 ** Finally get the results of the transaction. 584 */ 585 586 /* send the command and check ok to proceed */ 587 smtpmessage("DATA", m, mci); 588 SmtpPhase = mci->mci_phase = "client DATA 354"; 589 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 590 r = reply(m, mci, e, TimeOuts.to_datainit, NULL); 591 if (r < 0 || REPLYTYPE(r) == 4) 592 { 593 smtpquit(m, mci, e); 594 return (EX_TEMPFAIL); 595 } 596 else if (r == 554) 597 { 598 smtprset(m, mci, e); 599 return (EX_UNAVAILABLE); 600 } 601 else if (r != 354) 602 { 603 #ifdef LOG 604 if (LogLevel > 1) 605 { 606 syslog(LOG_CRIT, "%s: %s: SMTP DATA-1 protocol error: %s", 607 e->e_id, mci->mci_host, SmtpReplyBuffer); 608 } 609 #endif 610 smtprset(m, mci, e); 611 return (EX_PROTOCOL); 612 } 613 614 /* 615 ** Set timeout around data writes. Make it at least large 616 ** enough for DNS timeouts on all recipients plus some fudge 617 ** factor. The main thing is that it should not be infinite. 618 */ 619 620 if (setjmp(CtxDataTimeout) != 0) 621 { 622 mci->mci_errno = errno; 623 mci->mci_exitstat = EX_TEMPFAIL; 624 mci->mci_state = MCIS_ERROR; 625 syserr("451 timeout writing message to %s", mci->mci_host); 626 smtpquit(m, mci, e); 627 return EX_TEMPFAIL; 628 } 629 630 timeout = e->e_msgsize / 16; 631 if (timeout < (time_t) 600) 632 timeout = (time_t) 600; 633 timeout += e->e_nrcpts * 300; 634 ev = setevent(timeout, datatimeout, 0); 635 636 /* 637 ** Output the actual message. 638 */ 639 640 (*e->e_puthdr)(mci, e->e_header, e); 641 (*e->e_putbody)(mci, e, NULL); 642 643 /* 644 ** Cleanup after sending message. 645 */ 646 647 clrevent(ev); 648 649 if (ferror(mci->mci_out)) 650 { 651 /* error during processing -- don't send the dot */ 652 mci->mci_errno = EIO; 653 mci->mci_exitstat = EX_IOERR; 654 mci->mci_state = MCIS_ERROR; 655 smtpquit(m, mci, e); 656 return EX_IOERR; 657 } 658 659 /* terminate the message */ 660 fprintf(mci->mci_out, ".%s", m->m_eol); 661 if (TrafficLogFile != NULL) 662 fprintf(TrafficLogFile, "%05d >>> .\n", getpid()); 663 if (Verbose) 664 nmessage(">>> ."); 665 666 /* check for the results of the transaction */ 667 SmtpPhase = mci->mci_phase = "client DATA 250"; 668 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 669 r = reply(m, mci, e, TimeOuts.to_datafinal, NULL); 670 if (r < 0) 671 { 672 smtpquit(m, mci, e); 673 return (EX_TEMPFAIL); 674 } 675 mci->mci_state = MCIS_OPEN; 676 e->e_statmsg = newstr(&SmtpReplyBuffer[4]); 677 if (REPLYTYPE(r) == 4) 678 return (EX_TEMPFAIL); 679 else if (r == 250) 680 return (EX_OK); 681 else if (r == 552 || r == 554) 682 return (EX_UNAVAILABLE); 683 #ifdef LOG 684 if (LogLevel > 1) 685 { 686 syslog(LOG_CRIT, "%s: %s: SMTP DATA-2 protocol error: %s", 687 e->e_id, mci->mci_host, SmtpReplyBuffer); 688 } 689 #endif 690 return (EX_PROTOCOL); 691 } 692 693 694 static void 695 datatimeout() 696 { 697 longjmp(CtxDataTimeout, 1); 698 } 699 /* 700 ** SMTPQUIT -- close the SMTP connection. 701 ** 702 ** Parameters: 703 ** m -- a pointer to the mailer. 704 ** 705 ** Returns: 706 ** none. 707 ** 708 ** Side Effects: 709 ** sends the final protocol and closes the connection. 710 */ 711 712 smtpquit(m, mci, e) 713 register MAILER *m; 714 register MCI *mci; 715 ENVELOPE *e; 716 { 717 bool oldSuprErrs = SuprErrs; 718 719 /* 720 ** Suppress errors here -- we may be processing a different 721 ** job when we do the quit connection, and we don't want the 722 ** new job to be penalized for something that isn't it's 723 ** problem. 724 */ 725 726 SuprErrs = TRUE; 727 728 /* send the quit message if we haven't gotten I/O error */ 729 if (mci->mci_state != MCIS_ERROR) 730 { 731 SmtpPhase = "client QUIT"; 732 smtpmessage("QUIT", m, mci); 733 (void) reply(m, mci, e, TimeOuts.to_quit, NULL); 734 SuprErrs = oldSuprErrs; 735 if (mci->mci_state == MCIS_CLOSED) 736 { 737 SuprErrs = oldSuprErrs; 738 return; 739 } 740 } 741 742 /* now actually close the connection and pick up the zombie */ 743 (void) endmailer(mci, e, NULL); 744 745 SuprErrs = oldSuprErrs; 746 } 747 /* 748 ** SMTPRSET -- send a RSET (reset) command 749 */ 750 751 smtprset(m, mci, e) 752 register MAILER *m; 753 register MCI *mci; 754 ENVELOPE *e; 755 { 756 int r; 757 758 SmtpPhase = "client RSET"; 759 smtpmessage("RSET", m, mci); 760 r = reply(m, mci, e, TimeOuts.to_rset, NULL); 761 if (r < 0) 762 mci->mci_state = MCIS_ERROR; 763 else if (REPLYTYPE(r) == 2) 764 { 765 mci->mci_state = MCIS_OPEN; 766 return; 767 } 768 smtpquit(m, mci, e); 769 } 770 /* 771 ** SMTPPROBE -- check the connection state 772 */ 773 774 smtpprobe(mci) 775 register MCI *mci; 776 { 777 int r; 778 MAILER *m = mci->mci_mailer; 779 extern ENVELOPE BlankEnvelope; 780 ENVELOPE *e = &BlankEnvelope; 781 782 SmtpPhase = "client probe"; 783 smtpmessage("RSET", m, mci); 784 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 785 if (r < 0 || REPLYTYPE(r) != 2) 786 smtpquit(m, mci, e); 787 return r; 788 } 789 /* 790 ** REPLY -- read arpanet reply 791 ** 792 ** Parameters: 793 ** m -- the mailer we are reading the reply from. 794 ** mci -- the mailer connection info structure. 795 ** e -- the current envelope. 796 ** timeout -- the timeout for reads. 797 ** pfunc -- processing function for second and subsequent 798 ** lines of response -- if null, no special 799 ** processing is done. 800 ** 801 ** Returns: 802 ** reply code it reads. 803 ** 804 ** Side Effects: 805 ** flushes the mail file. 806 */ 807 808 reply(m, mci, e, timeout, pfunc) 809 MAILER *m; 810 MCI *mci; 811 ENVELOPE *e; 812 time_t timeout; 813 void (*pfunc)(); 814 { 815 register char *bufp; 816 register int r; 817 bool firstline = TRUE; 818 char junkbuf[MAXLINE]; 819 820 if (mci->mci_out != NULL) 821 (void) fflush(mci->mci_out); 822 823 if (tTd(18, 1)) 824 printf("reply\n"); 825 826 /* 827 ** Read the input line, being careful not to hang. 828 */ 829 830 for (bufp = SmtpReplyBuffer;; bufp = junkbuf) 831 { 832 register char *p; 833 extern time_t curtime(); 834 835 /* actually do the read */ 836 if (e->e_xfp != NULL) 837 (void) fflush(e->e_xfp); /* for debugging */ 838 839 /* if we are in the process of closing just give the code */ 840 if (mci->mci_state == MCIS_CLOSED) 841 return (SMTPCLOSING); 842 843 if (mci->mci_out != NULL) 844 fflush(mci->mci_out); 845 846 /* get the line from the other side */ 847 p = sfgets(bufp, MAXLINE, mci->mci_in, timeout, SmtpPhase); 848 mci->mci_lastuse = curtime(); 849 850 if (p == NULL) 851 { 852 bool oldholderrs; 853 extern char MsgBuf[]; /* err.c */ 854 855 /* if the remote end closed early, fake an error */ 856 if (errno == 0) 857 # ifdef ECONNRESET 858 errno = ECONNRESET; 859 # else /* ECONNRESET */ 860 errno = EPIPE; 861 # endif /* ECONNRESET */ 862 863 mci->mci_errno = errno; 864 mci->mci_exitstat = EX_TEMPFAIL; 865 oldholderrs = HoldErrs; 866 HoldErrs = TRUE; 867 usrerr("451 reply: read error from %s", mci->mci_host); 868 869 /* if debugging, pause so we can see state */ 870 if (tTd(18, 100)) 871 pause(); 872 mci->mci_state = MCIS_ERROR; 873 smtpquit(m, mci, e); 874 #ifdef XDEBUG 875 { 876 char wbuf[MAXLINE]; 877 char *p = wbuf; 878 if (e->e_to != NULL) 879 { 880 sprintf(p, "%s... ", e->e_to); 881 p += strlen(p); 882 } 883 sprintf(p, "reply(%s) during %s", 884 mci->mci_host, SmtpPhase); 885 checkfd012(wbuf); 886 } 887 #endif 888 HoldErrs = oldholderrs; 889 return (-1); 890 } 891 fixcrlf(bufp, TRUE); 892 893 /* EHLO failure is not a real error */ 894 if (e->e_xfp != NULL && (bufp[0] == '4' || 895 (bufp[0] == '5' && strncmp(SmtpMsgBuffer, "EHLO", 4) != 0))) 896 { 897 /* serious error -- log the previous command */ 898 if (SmtpNeedIntro) 899 { 900 /* inform user who we are chatting with */ 901 fprintf(CurEnv->e_xfp, 902 "... while talking to %s:\n", 903 CurHostName); 904 SmtpNeedIntro = FALSE; 905 } 906 if (SmtpMsgBuffer[0] != '\0') 907 fprintf(e->e_xfp, ">>> %s\n", SmtpMsgBuffer); 908 SmtpMsgBuffer[0] = '\0'; 909 910 /* now log the message as from the other side */ 911 fprintf(e->e_xfp, "<<< %s\n", bufp); 912 } 913 914 /* display the input for verbose mode */ 915 if (Verbose) 916 nmessage("050 %s", bufp); 917 918 /* process the line */ 919 if (pfunc != NULL) 920 (*pfunc)(bufp, firstline, m, mci, e); 921 922 firstline = FALSE; 923 924 /* if continuation is required, we can go on */ 925 if (bufp[3] == '-') 926 continue; 927 928 /* ignore improperly formated input */ 929 if (!(isascii(bufp[0]) && isdigit(bufp[0]))) 930 continue; 931 932 /* decode the reply code */ 933 r = atoi(bufp); 934 935 /* extra semantics: 0xx codes are "informational" */ 936 if (r >= 100) 937 break; 938 } 939 940 /* 941 ** Now look at SmtpReplyBuffer -- only care about the first 942 ** line of the response from here on out. 943 */ 944 945 /* save temporary failure messages for posterity */ 946 if (SmtpReplyBuffer[0] == '4' && SmtpError[0] == '\0') 947 (void) strcpy(SmtpError, SmtpReplyBuffer); 948 949 /* reply code 421 is "Service Shutting Down" */ 950 if (r == SMTPCLOSING && mci->mci_state != MCIS_SSD) 951 { 952 /* send the quit protocol */ 953 mci->mci_state = MCIS_SSD; 954 smtpquit(m, mci, e); 955 } 956 957 return (r); 958 } 959 /* 960 ** SMTPMESSAGE -- send message to server 961 ** 962 ** Parameters: 963 ** f -- format 964 ** m -- the mailer to control formatting. 965 ** a, b, c -- parameters 966 ** 967 ** Returns: 968 ** none. 969 ** 970 ** Side Effects: 971 ** writes message to mci->mci_out. 972 */ 973 974 /*VARARGS1*/ 975 #ifdef __STDC__ 976 smtpmessage(char *f, MAILER *m, MCI *mci, ...) 977 #else 978 smtpmessage(f, m, mci, va_alist) 979 char *f; 980 MAILER *m; 981 MCI *mci; 982 va_dcl 983 #endif 984 { 985 VA_LOCAL_DECL 986 987 VA_START(mci); 988 (void) vsprintf(SmtpMsgBuffer, f, ap); 989 VA_END; 990 991 if (tTd(18, 1) || Verbose) 992 nmessage(">>> %s", SmtpMsgBuffer); 993 if (TrafficLogFile != NULL) 994 fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), SmtpMsgBuffer); 995 if (mci->mci_out != NULL) 996 { 997 fprintf(mci->mci_out, "%s%s", SmtpMsgBuffer, 998 m == NULL ? "\r\n" : m->m_eol); 999 } 1000 else if (tTd(18, 1)) 1001 { 1002 printf("smtpmessage: NULL mci_out\n"); 1003 } 1004 } 1005 1006 # endif /* SMTP */ 1007