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 8.28 (Berkeley) 11/21/94 (with SMTP)"; 14 #else 15 static char sccsid[] = "@(#)usersmtp.c 8.28 (Berkeley) 11/21/94 (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 ** firstline -- set if this is the first line of the reply. 223 ** m -- the mailer. 224 ** mci -- the mailer connection info. 225 ** e -- the envelope. 226 ** 227 ** Returns: 228 ** none. 229 */ 230 231 void 232 esmtp_check(line, firstline, m, mci, e) 233 char *line; 234 bool firstline; 235 MAILER *m; 236 register MCI *mci; 237 ENVELOPE *e; 238 { 239 while ((line = strchr(++line, 'E')) != NULL) 240 { 241 if (strncmp(line, "ESMTP ", 6) == 0) 242 { 243 mci->mci_flags |= MCIF_ESMTP; 244 break; 245 } 246 } 247 } 248 /* 249 ** HELO_OPTIONS -- process the options on a HELO line. 250 ** 251 ** Parameters: 252 ** line -- the response line. 253 ** firstline -- set if this is the first line of the reply. 254 ** m -- the mailer. 255 ** mci -- the mailer connection info. 256 ** e -- the envelope. 257 ** 258 ** Returns: 259 ** none. 260 */ 261 262 void 263 helo_options(line, firstline, m, mci, e) 264 char *line; 265 bool firstline; 266 MAILER *m; 267 register MCI *mci; 268 ENVELOPE *e; 269 { 270 register char *p; 271 272 if (!firstline) 273 return; 274 275 if (strlen(line) < 5) 276 return; 277 line += 4; 278 p = strchr(line, ' '); 279 if (p != NULL) 280 *p++ = '\0'; 281 if (strcasecmp(line, "size") == 0) 282 { 283 mci->mci_flags |= MCIF_SIZE; 284 if (p != NULL) 285 mci->mci_maxsize = atol(p); 286 } 287 else if (strcasecmp(line, "8bitmime") == 0) 288 { 289 mci->mci_flags |= MCIF_8BITMIME; 290 mci->mci_flags &= ~MCIF_7BIT; 291 } 292 else if (strcasecmp(line, "expn") == 0) 293 mci->mci_flags |= MCIF_EXPN; 294 else if (strcasecmp(line, "x-dsn-1") == 0) 295 mci->mci_flags |= MCIF_DSN; 296 } 297 /* 298 ** SMTPMAILFROM -- send MAIL command 299 ** 300 ** Parameters: 301 ** m -- the mailer. 302 ** mci -- the mailer connection structure. 303 ** e -- the envelope (including the sender to specify). 304 */ 305 306 smtpmailfrom(m, mci, e) 307 struct mailer *m; 308 MCI *mci; 309 ENVELOPE *e; 310 { 311 int r; 312 char *bufp; 313 char *bodytype; 314 char buf[MAXNAME]; 315 char optbuf[MAXLINE]; 316 317 if (tTd(18, 2)) 318 printf("smtpmailfrom: CurHost=%s\n", CurHostName); 319 320 /* set up appropriate options to include */ 321 if (bitset(MCIF_SIZE, mci->mci_flags) && e->e_msgsize > 0) 322 sprintf(optbuf, " SIZE=%ld", e->e_msgsize); 323 else 324 strcpy(optbuf, ""); 325 326 bodytype = e->e_bodytype; 327 if (bitset(MCIF_8BITMIME, mci->mci_flags)) 328 { 329 if (bodytype == NULL && 330 bitset(MM_MIME8BIT, MimeMode) && 331 bitset(EF_HAS8BIT, e->e_flags) && 332 !bitnset(M_8BITS, m->m_flags)) 333 bodytype = "8BITMIME"; 334 if (bodytype != NULL) 335 { 336 strcat(optbuf, " BODY="); 337 strcat(optbuf, bodytype); 338 } 339 } 340 else if (bitnset(M_8BITS, m->m_flags)) 341 { 342 /* just pass it through */ 343 } 344 else if (bitset(MM_CVTMIME, MimeMode) && 345 (e->e_bodytype == NULL ? !bitset(MM_PASS8BIT, MimeMode) 346 : strcasecmp(e->e_bodytype, "7bit") != 0)) 347 { 348 /* must convert from 8bit MIME format to 7bit encoded */ 349 mci->mci_flags |= MCIF_CVT8TO7; 350 } 351 else if (!bitset(MM_PASS8BIT, MimeMode)) 352 { 353 /* cannot just send a 8-bit version */ 354 usrerr("%s does not support 8BITMIME", mci->mci_host); 355 return EX_DATAERR; 356 } 357 358 if (bitset(MCIF_DSN, mci->mci_flags)) 359 { 360 if (e->e_envid != NULL) 361 { 362 strcat(optbuf, " ENVID="); 363 strcat(optbuf, e->e_envid); 364 } 365 if (e->e_omts != NULL) 366 { 367 strcat(optbuf, " OMTS="); 368 strcat(optbuf, e->e_omts); 369 } 370 } 371 372 /* 373 ** Send the MAIL command. 374 ** Designates the sender. 375 */ 376 377 mci->mci_state = MCIS_ACTIVE; 378 379 if (bitset(EF_RESPONSE, e->e_flags) && 380 !bitnset(M_NO_NULL_FROM, m->m_flags)) 381 (void) strcpy(buf, ""); 382 else 383 expand("\201g", buf, &buf[sizeof buf - 1], e); 384 if (buf[0] == '<') 385 { 386 /* strip off <angle brackets> (put back on below) */ 387 bufp = &buf[strlen(buf) - 1]; 388 if (*bufp == '>') 389 *bufp = '\0'; 390 bufp = &buf[1]; 391 } 392 else 393 bufp = buf; 394 if (bitnset(M_LOCALMAILER, e->e_from.q_mailer->m_flags) || 395 !bitnset(M_FROMPATH, m->m_flags)) 396 { 397 smtpmessage("MAIL From:<%s>%s", m, mci, bufp, optbuf); 398 } 399 else 400 { 401 smtpmessage("MAIL From:<@%s%c%s>%s", m, mci, MyHostName, 402 *bufp == '@' ? ',' : ':', bufp, optbuf); 403 } 404 SmtpPhase = mci->mci_phase = "client MAIL"; 405 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 406 r = reply(m, mci, e, TimeOuts.to_mail, NULL); 407 if (r < 0 || REPLYTYPE(r) == 4) 408 { 409 mci->mci_exitstat = EX_TEMPFAIL; 410 mci->mci_errno = errno; 411 smtpquit(m, mci, e); 412 return EX_TEMPFAIL; 413 } 414 else if (r == 250) 415 { 416 mci->mci_exitstat = EX_OK; 417 return EX_OK; 418 } 419 else if (r == 552) 420 { 421 /* signal service unavailable */ 422 mci->mci_exitstat = EX_UNAVAILABLE; 423 smtpquit(m, mci, e); 424 return EX_UNAVAILABLE; 425 } 426 427 #ifdef LOG 428 if (LogLevel > 1) 429 { 430 syslog(LOG_CRIT, "%s: %s: SMTP MAIL protocol error: %s", 431 e->e_id, mci->mci_host, SmtpReplyBuffer); 432 } 433 #endif 434 435 /* protocol error -- close up */ 436 smtpquit(m, mci, e); 437 mci->mci_exitstat = EX_PROTOCOL; 438 return EX_PROTOCOL; 439 } 440 /* 441 ** SMTPRCPT -- designate recipient. 442 ** 443 ** Parameters: 444 ** to -- address of recipient. 445 ** m -- the mailer we are sending to. 446 ** mci -- the connection info for this transaction. 447 ** e -- the envelope for this transaction. 448 ** 449 ** Returns: 450 ** exit status corresponding to recipient status. 451 ** 452 ** Side Effects: 453 ** Sends the mail via SMTP. 454 */ 455 456 smtprcpt(to, m, mci, e) 457 ADDRESS *to; 458 register MAILER *m; 459 MCI *mci; 460 ENVELOPE *e; 461 { 462 register int r; 463 char optbuf[MAXLINE]; 464 465 strcpy(optbuf, ""); 466 if (bitset(MCIF_DSN, mci->mci_flags)) 467 { 468 bool firstone = TRUE; 469 470 strcat(optbuf, " NOTIFY="); 471 if (bitset(QPINGONFAILURE, to->q_flags)) 472 { 473 strcat(optbuf, "FAILURE"); 474 firstone = FALSE; 475 } 476 if (bitset(QPINGONSUCCESS, to->q_flags)) 477 { 478 if (firstone) 479 strcat(optbuf, ","); 480 strcat(optbuf, "SUCCESS"); 481 firstone = FALSE; 482 } 483 if (bitset(QPINGONDELAY, to->q_flags)) 484 { 485 if (firstone) 486 strcat(optbuf, ","); 487 strcat(optbuf, "DELAY"); 488 firstone = FALSE; 489 } 490 if (firstone) 491 strcat(optbuf, "NEVER"); 492 493 if (bitset(QHAS_RET_PARAM, to->q_flags)) 494 { 495 strcat(optbuf, " RET="); 496 if (bitset(QRET_HDRS, to->q_flags)) 497 strcat(optbuf, "HDRS"); 498 else 499 strcat(optbuf, "FULL"); 500 } 501 } 502 else if (bitset(QPINGONSUCCESS, to->q_flags)) 503 { 504 to->q_flags |= QRELAYED; 505 fprintf(e->e_xfp, "%s... relayed; expect no further notifications\n", 506 to->q_paddr); 507 } 508 509 smtpmessage("RCPT To:<%s>%s", m, mci, to->q_user, optbuf); 510 511 SmtpPhase = mci->mci_phase = "client RCPT"; 512 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 513 r = reply(m, mci, e, TimeOuts.to_rcpt, NULL); 514 setstatus(to, SmtpReplyBuffer); 515 if (r < 0 || REPLYTYPE(r) == 4) 516 return (EX_TEMPFAIL); 517 else if (REPLYTYPE(r) == 2) 518 return (EX_OK); 519 else if (r == 550 || r == 551 || r == 553) 520 return (EX_NOUSER); 521 else if (r == 552 || r == 554) 522 return (EX_UNAVAILABLE); 523 524 #ifdef LOG 525 if (LogLevel > 1) 526 { 527 syslog(LOG_CRIT, "%s: %s: SMTP RCPT protocol error: %s", 528 e->e_id, mci->mci_host, SmtpReplyBuffer); 529 } 530 #endif 531 532 return (EX_PROTOCOL); 533 } 534 /* 535 ** SMTPDATA -- send the data and clean up the transaction. 536 ** 537 ** Parameters: 538 ** m -- mailer being sent to. 539 ** e -- the envelope for this message. 540 ** 541 ** Returns: 542 ** exit status corresponding to DATA command. 543 ** 544 ** Side Effects: 545 ** none. 546 */ 547 548 static jmp_buf CtxDataTimeout; 549 static int datatimeout(); 550 551 smtpdata(m, mci, e) 552 struct mailer *m; 553 register MCI *mci; 554 register ENVELOPE *e; 555 { 556 register int r; 557 register EVENT *ev; 558 time_t timeout; 559 560 /* 561 ** Send the data. 562 ** First send the command and check that it is ok. 563 ** Then send the data. 564 ** Follow it up with a dot to terminate. 565 ** Finally get the results of the transaction. 566 */ 567 568 /* send the command and check ok to proceed */ 569 smtpmessage("DATA", m, mci); 570 SmtpPhase = mci->mci_phase = "client DATA 354"; 571 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 572 r = reply(m, mci, e, TimeOuts.to_datainit, NULL); 573 if (r < 0 || REPLYTYPE(r) == 4) 574 { 575 smtpquit(m, mci, e); 576 return (EX_TEMPFAIL); 577 } 578 else if (r == 554) 579 { 580 smtprset(m, mci, e); 581 return (EX_UNAVAILABLE); 582 } 583 else if (r != 354) 584 { 585 #ifdef LOG 586 if (LogLevel > 1) 587 { 588 syslog(LOG_CRIT, "%s: %s: SMTP DATA-1 protocol error: %s", 589 e->e_id, mci->mci_host, SmtpReplyBuffer); 590 } 591 #endif 592 smtprset(m, mci, e); 593 return (EX_PROTOCOL); 594 } 595 596 /* 597 ** Set timeout around data writes. Make it at least large 598 ** enough for DNS timeouts on all recipients plus some fudge 599 ** factor. The main thing is that it should not be infinite. 600 */ 601 602 if (setjmp(CtxDataTimeout) != 0) 603 { 604 mci->mci_errno = errno; 605 mci->mci_exitstat = EX_TEMPFAIL; 606 mci->mci_state = MCIS_ERROR; 607 syserr("451 timeout writing message to %s", mci->mci_host); 608 smtpquit(m, mci, e); 609 return EX_TEMPFAIL; 610 } 611 612 timeout = e->e_msgsize / 16; 613 if (timeout < (time_t) 60) 614 timeout = (time_t) 60; 615 timeout += e->e_nrcpts * 90; 616 ev = setevent(timeout, datatimeout, 0); 617 618 /* 619 ** Output the actual message. 620 */ 621 622 (*e->e_puthdr)(mci, e->e_header, e, 0); 623 (*e->e_putbody)(mci, e, NULL, 0); 624 625 /* 626 ** Cleanup after sending message. 627 */ 628 629 clrevent(ev); 630 631 if (ferror(mci->mci_out)) 632 { 633 /* error during processing -- don't send the dot */ 634 mci->mci_errno = EIO; 635 mci->mci_exitstat = EX_IOERR; 636 mci->mci_state = MCIS_ERROR; 637 smtpquit(m, mci, e); 638 return EX_IOERR; 639 } 640 641 /* terminate the message */ 642 fprintf(mci->mci_out, ".%s", m->m_eol); 643 if (TrafficLogFile != NULL) 644 fprintf(TrafficLogFile, "%05d >>> .\n", getpid()); 645 if (Verbose) 646 nmessage(">>> ."); 647 648 /* check for the results of the transaction */ 649 SmtpPhase = mci->mci_phase = "client DATA 250"; 650 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 651 r = reply(m, mci, e, TimeOuts.to_datafinal, NULL); 652 if (r < 0) 653 { 654 smtpquit(m, mci, e); 655 return (EX_TEMPFAIL); 656 } 657 mci->mci_state = MCIS_OPEN; 658 e->e_statmsg = newstr(&SmtpReplyBuffer[4]); 659 if (REPLYTYPE(r) == 4) 660 return (EX_TEMPFAIL); 661 else if (r == 250) 662 return (EX_OK); 663 else if (r == 552 || r == 554) 664 return (EX_UNAVAILABLE); 665 #ifdef LOG 666 if (LogLevel > 1) 667 { 668 syslog(LOG_CRIT, "%s: %s: SMTP DATA-2 protocol error: %s", 669 e->e_id, mci->mci_host, SmtpReplyBuffer); 670 } 671 #endif 672 return (EX_PROTOCOL); 673 } 674 675 676 static int 677 datatimeout() 678 { 679 longjmp(CtxDataTimeout, 1); 680 } 681 /* 682 ** SMTPQUIT -- close the SMTP connection. 683 ** 684 ** Parameters: 685 ** m -- a pointer to the mailer. 686 ** 687 ** Returns: 688 ** none. 689 ** 690 ** Side Effects: 691 ** sends the final protocol and closes the connection. 692 */ 693 694 smtpquit(m, mci, e) 695 register MAILER *m; 696 register MCI *mci; 697 ENVELOPE *e; 698 { 699 bool oldSuprErrs = SuprErrs; 700 701 /* 702 ** Suppress errors here -- we may be processing a different 703 ** job when we do the quit connection, and we don't want the 704 ** new job to be penalized for something that isn't it's 705 ** problem. 706 */ 707 708 SuprErrs = TRUE; 709 710 /* send the quit message if we haven't gotten I/O error */ 711 if (mci->mci_state != MCIS_ERROR) 712 { 713 SmtpPhase = "client QUIT"; 714 smtpmessage("QUIT", m, mci); 715 (void) reply(m, mci, e, TimeOuts.to_quit, NULL); 716 SuprErrs = oldSuprErrs; 717 if (mci->mci_state == MCIS_CLOSED) 718 { 719 SuprErrs = oldSuprErrs; 720 return; 721 } 722 } 723 724 /* now actually close the connection and pick up the zombie */ 725 (void) endmailer(mci, e, NULL); 726 727 SuprErrs = oldSuprErrs; 728 } 729 /* 730 ** SMTPRSET -- send a RSET (reset) command 731 */ 732 733 smtprset(m, mci, e) 734 register MAILER *m; 735 register MCI *mci; 736 ENVELOPE *e; 737 { 738 int r; 739 740 SmtpPhase = "client RSET"; 741 smtpmessage("RSET", m, mci); 742 r = reply(m, mci, e, TimeOuts.to_rset, NULL); 743 if (r < 0) 744 mci->mci_state = MCIS_ERROR; 745 else if (REPLYTYPE(r) == 2) 746 { 747 mci->mci_state = MCIS_OPEN; 748 return; 749 } 750 smtpquit(m, mci, e); 751 } 752 /* 753 ** SMTPPROBE -- check the connection state 754 */ 755 756 smtpprobe(mci) 757 register MCI *mci; 758 { 759 int r; 760 MAILER *m = mci->mci_mailer; 761 extern ENVELOPE BlankEnvelope; 762 ENVELOPE *e = &BlankEnvelope; 763 764 SmtpPhase = "client probe"; 765 smtpmessage("RSET", m, mci); 766 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 767 if (r < 0 || REPLYTYPE(r) != 2) 768 smtpquit(m, mci, e); 769 return r; 770 } 771 /* 772 ** REPLY -- read arpanet reply 773 ** 774 ** Parameters: 775 ** m -- the mailer we are reading the reply from. 776 ** mci -- the mailer connection info structure. 777 ** e -- the current envelope. 778 ** timeout -- the timeout for reads. 779 ** pfunc -- processing function for second and subsequent 780 ** lines of response -- if null, no special 781 ** processing is done. 782 ** 783 ** Returns: 784 ** reply code it reads. 785 ** 786 ** Side Effects: 787 ** flushes the mail file. 788 */ 789 790 reply(m, mci, e, timeout, pfunc) 791 MAILER *m; 792 MCI *mci; 793 ENVELOPE *e; 794 time_t timeout; 795 void (*pfunc)(); 796 { 797 register char *bufp; 798 register int r; 799 bool firstline = TRUE; 800 char junkbuf[MAXLINE]; 801 802 if (mci->mci_out != NULL) 803 (void) fflush(mci->mci_out); 804 805 if (tTd(18, 1)) 806 printf("reply\n"); 807 808 /* 809 ** Read the input line, being careful not to hang. 810 */ 811 812 for (bufp = SmtpReplyBuffer;; bufp = junkbuf) 813 { 814 register char *p; 815 extern time_t curtime(); 816 817 /* actually do the read */ 818 if (e->e_xfp != NULL) 819 (void) fflush(e->e_xfp); /* for debugging */ 820 821 /* if we are in the process of closing just give the code */ 822 if (mci->mci_state == MCIS_CLOSED) 823 return (SMTPCLOSING); 824 825 if (mci->mci_out != NULL) 826 fflush(mci->mci_out); 827 828 /* get the line from the other side */ 829 p = sfgets(bufp, MAXLINE, mci->mci_in, timeout, SmtpPhase); 830 mci->mci_lastuse = curtime(); 831 832 if (p == NULL) 833 { 834 bool oldholderrs; 835 extern char MsgBuf[]; /* err.c */ 836 837 /* if the remote end closed early, fake an error */ 838 if (errno == 0) 839 # ifdef ECONNRESET 840 errno = ECONNRESET; 841 # else /* ECONNRESET */ 842 errno = EPIPE; 843 # endif /* ECONNRESET */ 844 845 mci->mci_errno = errno; 846 mci->mci_exitstat = EX_TEMPFAIL; 847 oldholderrs = HoldErrs; 848 HoldErrs = TRUE; 849 usrerr("451 reply: read error from %s", mci->mci_host); 850 851 /* if debugging, pause so we can see state */ 852 if (tTd(18, 100)) 853 pause(); 854 mci->mci_state = MCIS_ERROR; 855 smtpquit(m, mci, e); 856 #ifdef XDEBUG 857 { 858 char wbuf[MAXLINE]; 859 char *p = wbuf; 860 if (e->e_to != NULL) 861 { 862 sprintf(p, "%s... ", e->e_to); 863 p += strlen(p); 864 } 865 sprintf(p, "reply(%s) during %s", 866 mci->mci_host, SmtpPhase); 867 checkfd012(wbuf); 868 } 869 #endif 870 HoldErrs = oldholderrs; 871 return (-1); 872 } 873 fixcrlf(bufp, TRUE); 874 875 /* EHLO failure is not a real error */ 876 if (e->e_xfp != NULL && (bufp[0] == '4' || 877 (bufp[0] == '5' && strncmp(SmtpMsgBuffer, "EHLO", 4) != 0))) 878 { 879 /* serious error -- log the previous command */ 880 if (SmtpNeedIntro) 881 { 882 /* inform user who we are chatting with */ 883 fprintf(CurEnv->e_xfp, 884 "... while talking to %s:\n", 885 CurHostName); 886 SmtpNeedIntro = FALSE; 887 } 888 if (SmtpMsgBuffer[0] != '\0') 889 fprintf(e->e_xfp, ">>> %s\n", SmtpMsgBuffer); 890 SmtpMsgBuffer[0] = '\0'; 891 892 /* now log the message as from the other side */ 893 fprintf(e->e_xfp, "<<< %s\n", bufp); 894 } 895 896 /* display the input for verbose mode */ 897 if (Verbose) 898 nmessage("050 %s", bufp); 899 900 /* process the line */ 901 if (pfunc != NULL) 902 (*pfunc)(bufp, firstline, m, mci, e); 903 904 firstline = FALSE; 905 906 /* if continuation is required, we can go on */ 907 if (bufp[3] == '-') 908 continue; 909 910 /* ignore improperly formated input */ 911 if (!(isascii(bufp[0]) && isdigit(bufp[0]))) 912 continue; 913 914 /* decode the reply code */ 915 r = atoi(bufp); 916 917 /* extra semantics: 0xx codes are "informational" */ 918 if (r >= 100) 919 break; 920 } 921 922 /* 923 ** Now look at SmtpReplyBuffer -- only care about the first 924 ** line of the response from here on out. 925 */ 926 927 /* save temporary failure messages for posterity */ 928 if (SmtpReplyBuffer[0] == '4' && SmtpError[0] == '\0') 929 (void) strcpy(SmtpError, SmtpReplyBuffer); 930 931 /* reply code 421 is "Service Shutting Down" */ 932 if (r == SMTPCLOSING && mci->mci_state != MCIS_SSD) 933 { 934 /* send the quit protocol */ 935 mci->mci_state = MCIS_SSD; 936 smtpquit(m, mci, e); 937 } 938 939 return (r); 940 } 941 /* 942 ** SMTPMESSAGE -- send message to server 943 ** 944 ** Parameters: 945 ** f -- format 946 ** m -- the mailer to control formatting. 947 ** a, b, c -- parameters 948 ** 949 ** Returns: 950 ** none. 951 ** 952 ** Side Effects: 953 ** writes message to mci->mci_out. 954 */ 955 956 /*VARARGS1*/ 957 #ifdef __STDC__ 958 smtpmessage(char *f, MAILER *m, MCI *mci, ...) 959 #else 960 smtpmessage(f, m, mci, va_alist) 961 char *f; 962 MAILER *m; 963 MCI *mci; 964 va_dcl 965 #endif 966 { 967 VA_LOCAL_DECL 968 969 VA_START(mci); 970 (void) vsprintf(SmtpMsgBuffer, f, ap); 971 VA_END; 972 973 if (tTd(18, 1) || Verbose) 974 nmessage(">>> %s", SmtpMsgBuffer); 975 if (TrafficLogFile != NULL) 976 fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), SmtpMsgBuffer); 977 if (mci->mci_out != NULL) 978 { 979 fprintf(mci->mci_out, "%s%s", SmtpMsgBuffer, 980 m == NULL ? "\r\n" : m->m_eol); 981 } 982 else if (tTd(18, 1)) 983 { 984 printf("smtpmessage: NULL mci_out\n"); 985 } 986 } 987 988 # endif /* SMTP */ 989