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 8.20 (Berkeley) 07/03/94 (with SMTP)"; 14 #else 15 static char sccsid[] = "@(#)usersmtp.c 8.20 (Berkeley) 07/03/94 (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 SmtpNeedIntro = TRUE; 83 switch (mci->mci_state) 84 { 85 case MCIS_ACTIVE: 86 /* need to clear old information */ 87 smtprset(m, mci, e); 88 /* fall through */ 89 90 case MCIS_OPEN: 91 return; 92 93 case MCIS_ERROR: 94 case MCIS_SSD: 95 /* shouldn't happen */ 96 smtpquit(m, mci, e); 97 /* fall through */ 98 99 case MCIS_CLOSED: 100 syserr("451 smtpinit: state CLOSED"); 101 return; 102 103 case MCIS_OPENING: 104 break; 105 } 106 107 mci->mci_state = MCIS_OPENING; 108 109 /* 110 ** Get the greeting message. 111 ** This should appear spontaneously. Give it five minutes to 112 ** happen. 113 */ 114 115 SmtpPhase = mci->mci_phase = "client greeting"; 116 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 117 r = reply(m, mci, e, TimeOuts.to_initial, esmtp_check); 118 if (r < 0 || REPLYTYPE(r) == 4) 119 goto tempfail1; 120 if (REPLYTYPE(r) != 2) 121 goto unavailable; 122 123 /* 124 ** Send the HELO command. 125 ** My mother taught me to always introduce myself. 126 */ 127 128 if (bitnset(M_ESMTP, m->m_flags)) 129 mci->mci_flags |= MCIF_ESMTP; 130 131 tryhelo: 132 if (bitset(MCIF_ESMTP, mci->mci_flags)) 133 { 134 smtpmessage("EHLO %s", m, mci, MyHostName); 135 SmtpPhase = mci->mci_phase = "client EHLO"; 136 } 137 else 138 { 139 smtpmessage("HELO %s", m, mci, MyHostName); 140 SmtpPhase = mci->mci_phase = "client HELO"; 141 } 142 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 143 r = reply(m, mci, e, TimeOuts.to_helo, helo_options); 144 if (r < 0) 145 goto tempfail1; 146 else if (REPLYTYPE(r) == 5) 147 { 148 if (bitset(MCIF_ESMTP, mci->mci_flags)) 149 { 150 /* try old SMTP instead */ 151 mci->mci_flags &= ~MCIF_ESMTP; 152 goto tryhelo; 153 } 154 goto unavailable; 155 } 156 else if (REPLYTYPE(r) != 2) 157 goto tempfail1; 158 159 /* 160 ** Check to see if we actually ended up talking to ourself. 161 ** This means we didn't know about an alias or MX, or we managed 162 ** to connect to an echo server. 163 */ 164 165 p = strchr(&SmtpReplyBuffer[4], ' '); 166 if (p != NULL) 167 *p = '\0'; 168 if (!bitnset(M_NOLOOPCHECK, m->m_flags) && 169 strcasecmp(&SmtpReplyBuffer[4], MyHostName) == 0) 170 { 171 syserr("553 %s config error: mail loops back to myself", 172 MyHostName); 173 mci->mci_exitstat = EX_CONFIG; 174 mci->mci_errno = 0; 175 smtpquit(m, mci, e); 176 return; 177 } 178 179 /* 180 ** If this is expected to be another sendmail, send some internal 181 ** commands. 182 */ 183 184 if (bitnset(M_INTERNAL, m->m_flags)) 185 { 186 /* tell it to be verbose */ 187 smtpmessage("VERB", m, mci); 188 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 189 if (r < 0) 190 goto tempfail2; 191 } 192 193 if (mci->mci_state != MCIS_CLOSED) 194 { 195 mci->mci_state = MCIS_OPEN; 196 return; 197 } 198 199 /* got a 421 error code during startup */ 200 201 tempfail1: 202 tempfail2: 203 mci->mci_exitstat = EX_TEMPFAIL; 204 if (mci->mci_errno == 0) 205 mci->mci_errno = errno; 206 if (mci->mci_state != MCIS_CLOSED) 207 smtpquit(m, mci, e); 208 return; 209 210 unavailable: 211 mci->mci_exitstat = EX_UNAVAILABLE; 212 mci->mci_errno = errno; 213 smtpquit(m, mci, e); 214 return; 215 } 216 /* 217 ** ESMTP_CHECK -- check to see if this implementation likes ESMTP protocol 218 ** 219 ** 220 ** Parameters: 221 ** line -- the response line. 222 ** m -- the mailer. 223 ** mci -- the mailer connection info. 224 ** e -- the envelope. 225 ** 226 ** Returns: 227 ** none. 228 */ 229 230 void 231 esmtp_check(line, m, mci, e) 232 char *line; 233 MAILER *m; 234 register MCI *mci; 235 ENVELOPE *e; 236 { 237 if (strlen(line) < 5) 238 return; 239 line += 4; 240 if (strncmp(line, "ESMTP ", 6) == 0) 241 mci->mci_flags |= MCIF_ESMTP; 242 } 243 /* 244 ** HELO_OPTIONS -- process the options on a HELO line. 245 ** 246 ** Parameters: 247 ** line -- the response line. 248 ** m -- the mailer. 249 ** mci -- the mailer connection info. 250 ** e -- the envelope. 251 ** 252 ** Returns: 253 ** none. 254 */ 255 256 void 257 helo_options(line, m, mci, e) 258 char *line; 259 MAILER *m; 260 register MCI *mci; 261 ENVELOPE *e; 262 { 263 register char *p; 264 265 if (strlen(line) < 5) 266 return; 267 line += 4; 268 p = strchr(line, ' '); 269 if (p != NULL) 270 *p++ = '\0'; 271 if (strcasecmp(line, "size") == 0) 272 { 273 mci->mci_flags |= MCIF_SIZE; 274 if (p != NULL) 275 mci->mci_maxsize = atol(p); 276 } 277 else if (strcasecmp(line, "8bitmime") == 0) 278 { 279 mci->mci_flags |= MCIF_8BITMIME; 280 mci->mci_flags &= ~MCIF_7BIT; 281 } 282 else if (strcasecmp(line, "expn") == 0) 283 mci->mci_flags |= MCIF_EXPN; 284 } 285 /* 286 ** SMTPMAILFROM -- send MAIL command 287 ** 288 ** Parameters: 289 ** m -- the mailer. 290 ** mci -- the mailer connection structure. 291 ** e -- the envelope (including the sender to specify). 292 */ 293 294 smtpmailfrom(m, mci, e) 295 struct mailer *m; 296 MCI *mci; 297 ENVELOPE *e; 298 { 299 int r; 300 char *bufp; 301 char buf[MAXNAME]; 302 char optbuf[MAXLINE]; 303 304 if (tTd(18, 2)) 305 printf("smtpmailfrom: CurHost=%s\n", CurHostName); 306 307 /* set up appropriate options to include */ 308 if (bitset(MCIF_SIZE, mci->mci_flags) && e->e_msgsize > 0) 309 sprintf(optbuf, " SIZE=%ld", e->e_msgsize); 310 else 311 strcpy(optbuf, ""); 312 313 if (e->e_bodytype != NULL) 314 { 315 if (bitset(MCIF_8BITMIME, mci->mci_flags)) 316 { 317 strcat(optbuf, " BODY="); 318 strcat(optbuf, e->e_bodytype); 319 } 320 else if (strcasecmp(e->e_bodytype, "7bit") != 0) 321 { 322 /* cannot just send a 7-bit version */ 323 usrerr("%s does not support 8BITMIME", mci->mci_host); 324 return EX_DATAERR; 325 } 326 } 327 328 /* 329 ** Send the MAIL command. 330 ** Designates the sender. 331 */ 332 333 mci->mci_state = MCIS_ACTIVE; 334 335 if (bitset(EF_RESPONSE, e->e_flags) && 336 !bitnset(M_NO_NULL_FROM, m->m_flags)) 337 (void) strcpy(buf, ""); 338 else 339 expand("\201g", buf, &buf[sizeof buf - 1], e); 340 if (buf[0] == '<') 341 { 342 /* strip off <angle brackets> (put back on below) */ 343 bufp = &buf[strlen(buf) - 1]; 344 if (*bufp == '>') 345 *bufp = '\0'; 346 bufp = &buf[1]; 347 } 348 else 349 bufp = buf; 350 if (bitnset(M_LOCALMAILER, e->e_from.q_mailer->m_flags) || 351 !bitnset(M_FROMPATH, m->m_flags)) 352 { 353 smtpmessage("MAIL From:<%s>%s", m, mci, bufp, optbuf); 354 } 355 else 356 { 357 smtpmessage("MAIL From:<@%s%c%s>%s", m, mci, MyHostName, 358 *bufp == '@' ? ',' : ':', bufp, optbuf); 359 } 360 SmtpPhase = mci->mci_phase = "client MAIL"; 361 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 362 r = reply(m, mci, e, TimeOuts.to_mail, NULL); 363 if (r < 0 || REPLYTYPE(r) == 4) 364 { 365 mci->mci_exitstat = EX_TEMPFAIL; 366 mci->mci_errno = errno; 367 smtpquit(m, mci, e); 368 return EX_TEMPFAIL; 369 } 370 else if (r == 250) 371 { 372 mci->mci_exitstat = EX_OK; 373 return EX_OK; 374 } 375 else if (r == 552) 376 { 377 /* signal service unavailable */ 378 mci->mci_exitstat = EX_UNAVAILABLE; 379 smtpquit(m, mci, e); 380 return EX_UNAVAILABLE; 381 } 382 383 #ifdef LOG 384 if (LogLevel > 1) 385 { 386 syslog(LOG_CRIT, "%s: SMTP MAIL protocol error: %s", 387 e->e_id, SmtpReplyBuffer); 388 } 389 #endif 390 391 /* protocol error -- close up */ 392 smtpquit(m, mci, e); 393 mci->mci_exitstat = EX_PROTOCOL; 394 return EX_PROTOCOL; 395 } 396 /* 397 ** SMTPRCPT -- designate recipient. 398 ** 399 ** Parameters: 400 ** to -- address of recipient. 401 ** m -- the mailer we are sending to. 402 ** mci -- the connection info for this transaction. 403 ** e -- the envelope for this transaction. 404 ** 405 ** Returns: 406 ** exit status corresponding to recipient status. 407 ** 408 ** Side Effects: 409 ** Sends the mail via SMTP. 410 */ 411 412 smtprcpt(to, m, mci, e) 413 ADDRESS *to; 414 register MAILER *m; 415 MCI *mci; 416 ENVELOPE *e; 417 { 418 register int r; 419 420 smtpmessage("RCPT To:<%s>", m, mci, to->q_user); 421 422 SmtpPhase = mci->mci_phase = "client RCPT"; 423 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 424 r = reply(m, mci, e, TimeOuts.to_rcpt, NULL); 425 if (r < 0 || REPLYTYPE(r) == 4) 426 return (EX_TEMPFAIL); 427 else if (REPLYTYPE(r) == 2) 428 return (EX_OK); 429 else if (r == 550 || r == 551 || r == 553) 430 return (EX_NOUSER); 431 else if (r == 552 || r == 554) 432 return (EX_UNAVAILABLE); 433 434 #ifdef LOG 435 if (LogLevel > 1) 436 { 437 syslog(LOG_CRIT, "%s: SMTP RCPT protocol error: %s", 438 e->e_id, SmtpReplyBuffer); 439 } 440 #endif 441 442 return (EX_PROTOCOL); 443 } 444 /* 445 ** SMTPDATA -- send the data and clean up the transaction. 446 ** 447 ** Parameters: 448 ** m -- mailer being sent to. 449 ** e -- the envelope for this message. 450 ** 451 ** Returns: 452 ** exit status corresponding to DATA command. 453 ** 454 ** Side Effects: 455 ** none. 456 */ 457 458 static jmp_buf CtxDataTimeout; 459 static int datatimeout(); 460 461 smtpdata(m, mci, e) 462 struct mailer *m; 463 register MCI *mci; 464 register ENVELOPE *e; 465 { 466 register int r; 467 register EVENT *ev; 468 time_t timeout; 469 470 /* 471 ** Send the data. 472 ** First send the command and check that it is ok. 473 ** Then send the data. 474 ** Follow it up with a dot to terminate. 475 ** Finally get the results of the transaction. 476 */ 477 478 /* send the command and check ok to proceed */ 479 smtpmessage("DATA", m, mci); 480 SmtpPhase = mci->mci_phase = "client DATA 354"; 481 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 482 r = reply(m, mci, e, TimeOuts.to_datainit, NULL); 483 if (r < 0 || REPLYTYPE(r) == 4) 484 { 485 smtpquit(m, mci, e); 486 return (EX_TEMPFAIL); 487 } 488 else if (r == 554) 489 { 490 smtprset(m, mci, e); 491 return (EX_UNAVAILABLE); 492 } 493 else if (r != 354) 494 { 495 #ifdef LOG 496 if (LogLevel > 1) 497 { 498 syslog(LOG_CRIT, "%s: SMTP DATA-1 protocol error: %s", 499 e->e_id, SmtpReplyBuffer); 500 } 501 #endif 502 smtprset(m, mci, e); 503 return (EX_PROTOCOL); 504 } 505 506 /* 507 ** Set timeout around data writes. Make it at least large 508 ** enough for DNS timeouts on all recipients plus some fudge 509 ** factor. The main thing is that it should not be infinite. 510 */ 511 512 if (setjmp(CtxDataTimeout) != 0) 513 { 514 mci->mci_errno = errno; 515 mci->mci_exitstat = EX_TEMPFAIL; 516 mci->mci_state = MCIS_ERROR; 517 syserr("451 timeout writing message to %s", mci->mci_host); 518 smtpquit(m, mci, e); 519 return EX_TEMPFAIL; 520 } 521 522 timeout = e->e_msgsize / 16; 523 if (timeout < (time_t) 60) 524 timeout = (time_t) 60; 525 timeout += e->e_nrcpts * 90; 526 ev = setevent(timeout, datatimeout, 0); 527 528 /* now output the actual message */ 529 (*e->e_puthdr)(mci, e); 530 putline("\n", mci); 531 (*e->e_putbody)(mci, e, NULL); 532 533 clrevent(ev); 534 535 if (ferror(mci->mci_out)) 536 { 537 /* error during processing -- don't send the dot */ 538 mci->mci_errno = EIO; 539 mci->mci_exitstat = EX_IOERR; 540 mci->mci_state = MCIS_ERROR; 541 smtpquit(m, mci, e); 542 return EX_IOERR; 543 } 544 545 /* terminate the message */ 546 fprintf(mci->mci_out, ".%s", m->m_eol); 547 if (TrafficLogFile != NULL) 548 fprintf(TrafficLogFile, "%05d >>> .\n", getpid()); 549 if (Verbose) 550 nmessage(">>> ."); 551 552 /* check for the results of the transaction */ 553 SmtpPhase = mci->mci_phase = "client DATA 250"; 554 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 555 r = reply(m, mci, e, TimeOuts.to_datafinal, NULL); 556 if (r < 0) 557 { 558 smtpquit(m, mci, e); 559 return (EX_TEMPFAIL); 560 } 561 mci->mci_state = MCIS_OPEN; 562 e->e_statmsg = newstr(&SmtpReplyBuffer[4]); 563 if (REPLYTYPE(r) == 4) 564 return (EX_TEMPFAIL); 565 else if (r == 250) 566 return (EX_OK); 567 else if (r == 552 || r == 554) 568 return (EX_UNAVAILABLE); 569 #ifdef LOG 570 if (LogLevel > 1) 571 { 572 syslog(LOG_CRIT, "%s: SMTP DATA-2 protocol error: %s", 573 e->e_id, SmtpReplyBuffer); 574 } 575 #endif 576 return (EX_PROTOCOL); 577 } 578 579 580 static int 581 datatimeout() 582 { 583 longjmp(CtxDataTimeout, 1); 584 } 585 /* 586 ** SMTPQUIT -- close the SMTP connection. 587 ** 588 ** Parameters: 589 ** m -- a pointer to the mailer. 590 ** 591 ** Returns: 592 ** none. 593 ** 594 ** Side Effects: 595 ** sends the final protocol and closes the connection. 596 */ 597 598 smtpquit(m, mci, e) 599 register MAILER *m; 600 register MCI *mci; 601 ENVELOPE *e; 602 { 603 bool oldSuprErrs = SuprErrs; 604 605 /* 606 ** Suppress errors here -- we may be processing a different 607 ** job when we do the quit connection, and we don't want the 608 ** new job to be penalized for something that isn't it's 609 ** problem. 610 */ 611 612 SuprErrs = TRUE; 613 614 /* send the quit message if we haven't gotten I/O error */ 615 if (mci->mci_state != MCIS_ERROR) 616 { 617 SmtpPhase = "client QUIT"; 618 smtpmessage("QUIT", m, mci); 619 (void) reply(m, mci, e, TimeOuts.to_quit, NULL); 620 SuprErrs = oldSuprErrs; 621 if (mci->mci_state == MCIS_CLOSED) 622 { 623 SuprErrs = oldSuprErrs; 624 return; 625 } 626 } 627 628 /* now actually close the connection and pick up the zombie */ 629 (void) endmailer(mci, e, NULL); 630 631 SuprErrs = oldSuprErrs; 632 } 633 /* 634 ** SMTPRSET -- send a RSET (reset) command 635 */ 636 637 smtprset(m, mci, e) 638 register MAILER *m; 639 register MCI *mci; 640 ENVELOPE *e; 641 { 642 int r; 643 644 SmtpPhase = "client RSET"; 645 smtpmessage("RSET", m, mci); 646 r = reply(m, mci, e, TimeOuts.to_rset, NULL); 647 if (r < 0) 648 mci->mci_state = MCIS_ERROR; 649 else if (REPLYTYPE(r) == 2) 650 { 651 mci->mci_state = MCIS_OPEN; 652 return; 653 } 654 smtpquit(m, mci, e); 655 } 656 /* 657 ** SMTPPROBE -- check the connection state 658 */ 659 660 smtpprobe(mci) 661 register MCI *mci; 662 { 663 int r; 664 MAILER *m = mci->mci_mailer; 665 extern ENVELOPE BlankEnvelope; 666 ENVELOPE *e = &BlankEnvelope; 667 668 SmtpPhase = "client probe"; 669 smtpmessage("RSET", m, mci); 670 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 671 if (r < 0 || REPLYTYPE(r) != 2) 672 smtpquit(m, mci, e); 673 return r; 674 } 675 /* 676 ** REPLY -- read arpanet reply 677 ** 678 ** Parameters: 679 ** m -- the mailer we are reading the reply from. 680 ** mci -- the mailer connection info structure. 681 ** e -- the current envelope. 682 ** timeout -- the timeout for reads. 683 ** pfunc -- processing function for second and subsequent 684 ** lines of response -- if null, no special 685 ** processing is done. 686 ** 687 ** Returns: 688 ** reply code it reads. 689 ** 690 ** Side Effects: 691 ** flushes the mail file. 692 */ 693 694 reply(m, mci, e, timeout, pfunc) 695 MAILER *m; 696 MCI *mci; 697 ENVELOPE *e; 698 time_t timeout; 699 void (*pfunc)(); 700 { 701 register char *bufp; 702 register int r; 703 bool firstline = TRUE; 704 char junkbuf[MAXLINE]; 705 706 if (mci->mci_out != NULL) 707 (void) fflush(mci->mci_out); 708 709 if (tTd(18, 1)) 710 printf("reply\n"); 711 712 /* 713 ** Read the input line, being careful not to hang. 714 */ 715 716 for (bufp = SmtpReplyBuffer;; bufp = junkbuf) 717 { 718 register char *p; 719 extern time_t curtime(); 720 721 /* actually do the read */ 722 if (e->e_xfp != NULL) 723 (void) fflush(e->e_xfp); /* for debugging */ 724 725 /* if we are in the process of closing just give the code */ 726 if (mci->mci_state == MCIS_CLOSED) 727 return (SMTPCLOSING); 728 729 if (mci->mci_out != NULL) 730 fflush(mci->mci_out); 731 732 /* get the line from the other side */ 733 p = sfgets(bufp, MAXLINE, mci->mci_in, timeout, SmtpPhase); 734 mci->mci_lastuse = curtime(); 735 736 if (p == NULL) 737 { 738 bool oldholderrs; 739 extern char MsgBuf[]; /* err.c */ 740 741 /* if the remote end closed early, fake an error */ 742 if (errno == 0) 743 # ifdef ECONNRESET 744 errno = ECONNRESET; 745 # else /* ECONNRESET */ 746 errno = EPIPE; 747 # endif /* ECONNRESET */ 748 749 mci->mci_errno = errno; 750 mci->mci_exitstat = EX_TEMPFAIL; 751 oldholderrs = HoldErrs; 752 HoldErrs = TRUE; 753 usrerr("451 reply: read error from %s", mci->mci_host); 754 755 /* if debugging, pause so we can see state */ 756 if (tTd(18, 100)) 757 pause(); 758 mci->mci_state = MCIS_ERROR; 759 smtpquit(m, mci, e); 760 #ifdef XDEBUG 761 { 762 char wbuf[MAXLINE]; 763 char *p = wbuf; 764 if (e->e_to != NULL) 765 { 766 sprintf(p, "%s... ", e->e_to); 767 p += strlen(p); 768 } 769 sprintf(p, "reply(%s) during %s", 770 mci->mci_host, SmtpPhase); 771 checkfd012(wbuf); 772 } 773 #endif 774 HoldErrs = oldholderrs; 775 return (-1); 776 } 777 fixcrlf(bufp, TRUE); 778 779 /* EHLO failure is not a real error */ 780 if (e->e_xfp != NULL && (bufp[0] == '4' || 781 (bufp[0] == '5' && strncmp(SmtpMsgBuffer, "EHLO", 4) != 0))) 782 { 783 /* serious error -- log the previous command */ 784 if (SmtpNeedIntro) 785 { 786 /* inform user who we are chatting with */ 787 fprintf(CurEnv->e_xfp, 788 "... while talking to %s:\n", 789 CurHostName); 790 SmtpNeedIntro = FALSE; 791 } 792 if (SmtpMsgBuffer[0] != '\0') 793 fprintf(e->e_xfp, ">>> %s\n", SmtpMsgBuffer); 794 SmtpMsgBuffer[0] = '\0'; 795 796 /* now log the message as from the other side */ 797 fprintf(e->e_xfp, "<<< %s\n", bufp); 798 } 799 800 /* display the input for verbose mode */ 801 if (Verbose) 802 nmessage("050 %s", bufp); 803 804 /* process the line */ 805 if (pfunc != NULL && !firstline) 806 (*pfunc)(bufp, m, mci, e); 807 808 firstline = FALSE; 809 810 /* if continuation is required, we can go on */ 811 if (bufp[3] == '-') 812 continue; 813 814 /* ignore improperly formated input */ 815 if (!(isascii(bufp[0]) && isdigit(bufp[0]))) 816 continue; 817 818 /* decode the reply code */ 819 r = atoi(bufp); 820 821 /* extra semantics: 0xx codes are "informational" */ 822 if (r >= 100) 823 break; 824 } 825 826 /* 827 ** Now look at SmtpReplyBuffer -- only care about the first 828 ** line of the response from here on out. 829 */ 830 831 /* save temporary failure messages for posterity */ 832 if (SmtpReplyBuffer[0] == '4' && SmtpError[0] == '\0') 833 (void) strcpy(SmtpError, SmtpReplyBuffer); 834 835 /* reply code 421 is "Service Shutting Down" */ 836 if (r == SMTPCLOSING && mci->mci_state != MCIS_SSD) 837 { 838 /* send the quit protocol */ 839 mci->mci_state = MCIS_SSD; 840 smtpquit(m, mci, e); 841 } 842 843 return (r); 844 } 845 /* 846 ** SMTPMESSAGE -- send message to server 847 ** 848 ** Parameters: 849 ** f -- format 850 ** m -- the mailer to control formatting. 851 ** a, b, c -- parameters 852 ** 853 ** Returns: 854 ** none. 855 ** 856 ** Side Effects: 857 ** writes message to mci->mci_out. 858 */ 859 860 /*VARARGS1*/ 861 #ifdef __STDC__ 862 smtpmessage(char *f, MAILER *m, MCI *mci, ...) 863 #else 864 smtpmessage(f, m, mci, va_alist) 865 char *f; 866 MAILER *m; 867 MCI *mci; 868 va_dcl 869 #endif 870 { 871 VA_LOCAL_DECL 872 873 VA_START(mci); 874 (void) vsprintf(SmtpMsgBuffer, f, ap); 875 VA_END; 876 877 if (tTd(18, 1) || Verbose) 878 nmessage(">>> %s", SmtpMsgBuffer); 879 if (TrafficLogFile != NULL) 880 fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), SmtpMsgBuffer); 881 if (mci->mci_out != NULL) 882 { 883 fprintf(mci->mci_out, "%s%s", SmtpMsgBuffer, 884 m == NULL ? "\r\n" : m->m_eol); 885 } 886 else if (tTd(18, 1)) 887 { 888 printf("smtpmessage: NULL mci_out\n"); 889 } 890 } 891 892 # endif /* SMTP */ 893