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 8.37 (Berkeley) 03/14/95 (with SMTP)"; 14 #else 15 static char sccsid[] = "@(#)usersmtp.c 8.37 (Berkeley) 03/14/95 (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 ** 222 ** Parameters: 223 ** line -- the response line. 224 ** firstline -- set if this is the first line of the reply. 225 ** m -- the mailer. 226 ** mci -- the mailer connection info. 227 ** e -- the envelope. 228 ** 229 ** Returns: 230 ** none. 231 */ 232 233 void 234 esmtp_check(line, firstline, m, mci, e) 235 char *line; 236 bool firstline; 237 MAILER *m; 238 register MCI *mci; 239 ENVELOPE *e; 240 { 241 while ((line = strchr(++line, 'E')) != NULL) 242 { 243 if (strncmp(line, "ESMTP ", 6) == 0) 244 { 245 mci->mci_flags |= MCIF_ESMTP; 246 break; 247 } 248 } 249 } 250 /* 251 ** HELO_OPTIONS -- process the options on a HELO line. 252 ** 253 ** Parameters: 254 ** line -- the response line. 255 ** firstline -- set if this is the first line of the reply. 256 ** m -- the mailer. 257 ** mci -- the mailer connection info. 258 ** e -- the envelope. 259 ** 260 ** Returns: 261 ** none. 262 */ 263 264 void 265 helo_options(line, firstline, m, mci, e) 266 char *line; 267 bool firstline; 268 MAILER *m; 269 register MCI *mci; 270 ENVELOPE *e; 271 { 272 register char *p; 273 274 if (firstline) 275 return; 276 277 if (strlen(line) < 5) 278 return; 279 line += 4; 280 p = strchr(line, ' '); 281 if (p != NULL) 282 *p++ = '\0'; 283 if (strcasecmp(line, "size") == 0) 284 { 285 mci->mci_flags |= MCIF_SIZE; 286 if (p != NULL) 287 mci->mci_maxsize = atol(p); 288 } 289 else if (strcasecmp(line, "8bitmime") == 0) 290 { 291 mci->mci_flags |= MCIF_8BITMIME; 292 mci->mci_flags &= ~MCIF_7BIT; 293 } 294 else if (strcasecmp(line, "expn") == 0) 295 mci->mci_flags |= MCIF_EXPN; 296 else if (strcasecmp(line, "x-dsn-1") == 0) 297 mci->mci_flags |= MCIF_DSN; 298 } 299 /* 300 ** SMTPMAILFROM -- send MAIL command 301 ** 302 ** Parameters: 303 ** m -- the mailer. 304 ** mci -- the mailer connection structure. 305 ** e -- the envelope (including the sender to specify). 306 */ 307 308 smtpmailfrom(m, mci, e) 309 struct mailer *m; 310 MCI *mci; 311 ENVELOPE *e; 312 { 313 int r; 314 char *bufp; 315 char *bodytype; 316 char buf[MAXNAME + 1]; 317 char optbuf[MAXLINE]; 318 319 if (tTd(18, 2)) 320 printf("smtpmailfrom: CurHost=%s\n", CurHostName); 321 322 /* set up appropriate options to include */ 323 if (bitset(MCIF_SIZE, mci->mci_flags) && e->e_msgsize > 0) 324 sprintf(optbuf, " SIZE=%ld", e->e_msgsize); 325 else 326 strcpy(optbuf, ""); 327 328 bodytype = e->e_bodytype; 329 if (bitset(MCIF_8BITMIME, mci->mci_flags)) 330 { 331 if (bodytype == NULL && 332 bitset(MM_MIME8BIT, MimeMode) && 333 bitset(EF_HAS8BIT, e->e_flags) && 334 !bitnset(M_8BITS, m->m_flags)) 335 bodytype = "8BITMIME"; 336 if (bodytype != NULL) 337 { 338 strcat(optbuf, " BODY="); 339 strcat(optbuf, bodytype); 340 } 341 } 342 else if (bitnset(M_8BITS, m->m_flags) || 343 !bitset(EF_HAS8BIT, e->e_flags) || 344 (e->e_bodytype != NULL && 345 strcasecmp(e->e_bodytype, "7bit") == 0)) 346 { 347 /* just pass it through */ 348 } 349 else if (bitset(MM_CVTMIME, MimeMode) && 350 (e->e_bodytype != NULL || !bitset(MM_PASS8BIT, MimeMode))) 351 { 352 /* must convert from 8bit MIME format to 7bit encoded */ 353 mci->mci_flags |= MCIF_CVT8TO7; 354 } 355 else if (!bitset(MM_PASS8BIT, MimeMode)) 356 { 357 /* cannot just send a 8-bit version */ 358 usrerr("%s does not support 8BITMIME", mci->mci_host); 359 return EX_DATAERR; 360 } 361 362 if (bitset(MCIF_DSN, mci->mci_flags)) 363 { 364 if (e->e_envid != NULL) 365 { 366 strcat(optbuf, " ENVID="); 367 strcat(optbuf, e->e_envid); 368 } 369 } 370 371 /* 372 ** Send the MAIL command. 373 ** Designates the sender. 374 */ 375 376 mci->mci_state = MCIS_ACTIVE; 377 378 if (bitset(EF_RESPONSE, e->e_flags) && 379 !bitnset(M_NO_NULL_FROM, m->m_flags)) 380 (void) strcpy(buf, ""); 381 else 382 expand("\201g", buf, &buf[sizeof buf], e); 383 if (buf[0] == '<') 384 { 385 /* strip off <angle brackets> (put back on below) */ 386 bufp = &buf[strlen(buf) - 1]; 387 if (*bufp == '>') 388 *bufp = '\0'; 389 bufp = &buf[1]; 390 } 391 else 392 bufp = buf; 393 if (bitnset(M_LOCALMAILER, e->e_from.q_mailer->m_flags) || 394 !bitnset(M_FROMPATH, m->m_flags)) 395 { 396 smtpmessage("MAIL From:<%s>%s", m, mci, bufp, optbuf); 397 } 398 else 399 { 400 smtpmessage("MAIL From:<@%s%c%s>%s", m, mci, MyHostName, 401 *bufp == '@' ? ',' : ':', bufp, optbuf); 402 } 403 SmtpPhase = mci->mci_phase = "client MAIL"; 404 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 405 r = reply(m, mci, e, TimeOuts.to_mail, NULL); 406 if (r < 0 || REPLYTYPE(r) == 4) 407 { 408 mci->mci_exitstat = EX_TEMPFAIL; 409 mci->mci_errno = errno; 410 smtpquit(m, mci, e); 411 return EX_TEMPFAIL; 412 } 413 else if (r == 250) 414 { 415 return EX_OK; 416 } 417 else if (r == 501 || r == 553) 418 { 419 /* syntax error in arguments */ 420 smtpquit(m, mci, e); 421 return EX_DATAERR; 422 } 423 else if (r == 552) 424 { 425 /* signal service unavailable */ 426 smtpquit(m, mci, e); 427 return EX_UNAVAILABLE; 428 } 429 430 #ifdef LOG 431 if (LogLevel > 1) 432 { 433 syslog(LOG_CRIT, "%s: %s: SMTP MAIL protocol error: %s", 434 e->e_id, mci->mci_host, SmtpReplyBuffer); 435 } 436 #endif 437 438 /* protocol error -- close up */ 439 smtpquit(m, mci, e); 440 return EX_PROTOCOL; 441 } 442 /* 443 ** SMTPRCPT -- designate recipient. 444 ** 445 ** Parameters: 446 ** to -- address of recipient. 447 ** m -- the mailer we are sending to. 448 ** mci -- the connection info for this transaction. 449 ** e -- the envelope for this transaction. 450 ** 451 ** Returns: 452 ** exit status corresponding to recipient status. 453 ** 454 ** Side Effects: 455 ** Sends the mail via SMTP. 456 */ 457 458 smtprcpt(to, m, mci, e) 459 ADDRESS *to; 460 register MAILER *m; 461 MCI *mci; 462 ENVELOPE *e; 463 { 464 register int r; 465 char optbuf[MAXLINE]; 466 467 strcpy(optbuf, ""); 468 if (bitset(MCIF_DSN, mci->mci_flags)) 469 { 470 bool firstone = TRUE; 471 472 /* NOTIFY= parameter */ 473 strcat(optbuf, " NOTIFY="); 474 if (bitset(QPINGONSUCCESS, to->q_flags)) 475 { 476 strcat(optbuf, "SUCCESS"); 477 firstone = FALSE; 478 } 479 if (bitset(QPINGONFAILURE, to->q_flags)) 480 { 481 if (!firstone) 482 strcat(optbuf, ","); 483 strcat(optbuf, "FAILURE"); 484 firstone = FALSE; 485 } 486 if (bitset(QPINGONDELAY, to->q_flags)) 487 { 488 if (!firstone) 489 strcat(optbuf, ","); 490 strcat(optbuf, "DELAY"); 491 firstone = FALSE; 492 } 493 if (firstone) 494 strcat(optbuf, "NEVER"); 495 496 /* RET= parameter */ 497 if (bitset(QHAS_RET_PARAM, to->q_flags)) 498 { 499 strcat(optbuf, " RET="); 500 if (bitset(QRET_HDRS, to->q_flags)) 501 strcat(optbuf, "HDRS"); 502 else 503 strcat(optbuf, "FULL"); 504 } 505 506 /* ORCPT= parameter */ 507 if (to->q_orcpt != NULL) 508 { 509 strcat(optbuf, " ORCPT="); 510 strcat(optbuf, to->q_orcpt); 511 } 512 } 513 514 smtpmessage("RCPT To:<%s>%s", m, mci, to->q_user, optbuf); 515 516 SmtpPhase = mci->mci_phase = "client RCPT"; 517 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 518 r = reply(m, mci, e, TimeOuts.to_rcpt, NULL); 519 setstatus(to, SmtpReplyBuffer); 520 if (r < 0 || REPLYTYPE(r) == 4) 521 return (EX_TEMPFAIL); 522 else if (REPLYTYPE(r) == 2) 523 return (EX_OK); 524 else if (r == 550 || r == 551 || r == 553) 525 return (EX_NOUSER); 526 else if (r == 552 || r == 554) 527 return (EX_UNAVAILABLE); 528 529 #ifdef LOG 530 if (LogLevel > 1) 531 { 532 syslog(LOG_CRIT, "%s: %s: SMTP RCPT protocol error: %s", 533 e->e_id, mci->mci_host, SmtpReplyBuffer); 534 } 535 #endif 536 537 return (EX_PROTOCOL); 538 } 539 /* 540 ** SMTPDATA -- send the data and clean up the transaction. 541 ** 542 ** Parameters: 543 ** m -- mailer being sent to. 544 ** e -- the envelope for this message. 545 ** 546 ** Returns: 547 ** exit status corresponding to DATA command. 548 ** 549 ** Side Effects: 550 ** none. 551 */ 552 553 static jmp_buf CtxDataTimeout; 554 static void datatimeout(); 555 556 smtpdata(m, mci, e) 557 struct mailer *m; 558 register MCI *mci; 559 register ENVELOPE *e; 560 { 561 register int r; 562 register EVENT *ev; 563 time_t timeout; 564 565 /* 566 ** Send the data. 567 ** First send the command and check that it is ok. 568 ** Then send the data. 569 ** Follow it up with a dot to terminate. 570 ** Finally get the results of the transaction. 571 */ 572 573 /* send the command and check ok to proceed */ 574 smtpmessage("DATA", m, mci); 575 SmtpPhase = mci->mci_phase = "client DATA 354"; 576 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 577 r = reply(m, mci, e, TimeOuts.to_datainit, NULL); 578 if (r < 0 || REPLYTYPE(r) == 4) 579 { 580 smtpquit(m, mci, e); 581 return (EX_TEMPFAIL); 582 } 583 else if (r == 554) 584 { 585 smtprset(m, mci, e); 586 return (EX_UNAVAILABLE); 587 } 588 else if (r != 354) 589 { 590 #ifdef LOG 591 if (LogLevel > 1) 592 { 593 syslog(LOG_CRIT, "%s: %s: SMTP DATA-1 protocol error: %s", 594 e->e_id, mci->mci_host, SmtpReplyBuffer); 595 } 596 #endif 597 smtprset(m, mci, e); 598 return (EX_PROTOCOL); 599 } 600 601 /* 602 ** Set timeout around data writes. Make it at least large 603 ** enough for DNS timeouts on all recipients plus some fudge 604 ** factor. The main thing is that it should not be infinite. 605 */ 606 607 if (setjmp(CtxDataTimeout) != 0) 608 { 609 mci->mci_errno = errno; 610 mci->mci_exitstat = EX_TEMPFAIL; 611 mci->mci_state = MCIS_ERROR; 612 syserr("451 timeout writing message to %s", mci->mci_host); 613 smtpquit(m, mci, e); 614 return EX_TEMPFAIL; 615 } 616 617 timeout = e->e_msgsize / 16; 618 if (timeout < (time_t) 60) 619 timeout = (time_t) 60; 620 timeout += e->e_nrcpts * 90; 621 ev = setevent(timeout, datatimeout, 0); 622 623 /* 624 ** Output the actual message. 625 */ 626 627 (*e->e_puthdr)(mci, e->e_header, e); 628 (*e->e_putbody)(mci, e, NULL); 629 630 /* 631 ** Cleanup after sending message. 632 */ 633 634 clrevent(ev); 635 636 if (ferror(mci->mci_out)) 637 { 638 /* error during processing -- don't send the dot */ 639 mci->mci_errno = EIO; 640 mci->mci_exitstat = EX_IOERR; 641 mci->mci_state = MCIS_ERROR; 642 smtpquit(m, mci, e); 643 return EX_IOERR; 644 } 645 646 /* terminate the message */ 647 fprintf(mci->mci_out, ".%s", m->m_eol); 648 if (TrafficLogFile != NULL) 649 fprintf(TrafficLogFile, "%05d >>> .\n", getpid()); 650 if (Verbose) 651 nmessage(">>> ."); 652 653 /* check for the results of the transaction */ 654 SmtpPhase = mci->mci_phase = "client DATA 250"; 655 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 656 r = reply(m, mci, e, TimeOuts.to_datafinal, NULL); 657 if (r < 0) 658 { 659 smtpquit(m, mci, e); 660 return (EX_TEMPFAIL); 661 } 662 mci->mci_state = MCIS_OPEN; 663 e->e_statmsg = newstr(&SmtpReplyBuffer[4]); 664 if (REPLYTYPE(r) == 4) 665 return (EX_TEMPFAIL); 666 else if (r == 250) 667 return (EX_OK); 668 else if (r == 552 || r == 554) 669 return (EX_UNAVAILABLE); 670 #ifdef LOG 671 if (LogLevel > 1) 672 { 673 syslog(LOG_CRIT, "%s: %s: SMTP DATA-2 protocol error: %s", 674 e->e_id, mci->mci_host, SmtpReplyBuffer); 675 } 676 #endif 677 return (EX_PROTOCOL); 678 } 679 680 681 static void 682 datatimeout() 683 { 684 longjmp(CtxDataTimeout, 1); 685 } 686 /* 687 ** SMTPQUIT -- close the SMTP connection. 688 ** 689 ** Parameters: 690 ** m -- a pointer to the mailer. 691 ** 692 ** Returns: 693 ** none. 694 ** 695 ** Side Effects: 696 ** sends the final protocol and closes the connection. 697 */ 698 699 smtpquit(m, mci, e) 700 register MAILER *m; 701 register MCI *mci; 702 ENVELOPE *e; 703 { 704 bool oldSuprErrs = SuprErrs; 705 706 /* 707 ** Suppress errors here -- we may be processing a different 708 ** job when we do the quit connection, and we don't want the 709 ** new job to be penalized for something that isn't it's 710 ** problem. 711 */ 712 713 SuprErrs = TRUE; 714 715 /* send the quit message if we haven't gotten I/O error */ 716 if (mci->mci_state != MCIS_ERROR) 717 { 718 SmtpPhase = "client QUIT"; 719 smtpmessage("QUIT", m, mci); 720 (void) reply(m, mci, e, TimeOuts.to_quit, NULL); 721 SuprErrs = oldSuprErrs; 722 if (mci->mci_state == MCIS_CLOSED) 723 { 724 SuprErrs = oldSuprErrs; 725 return; 726 } 727 } 728 729 /* now actually close the connection and pick up the zombie */ 730 (void) endmailer(mci, e, NULL); 731 732 SuprErrs = oldSuprErrs; 733 } 734 /* 735 ** SMTPRSET -- send a RSET (reset) command 736 */ 737 738 smtprset(m, mci, e) 739 register MAILER *m; 740 register MCI *mci; 741 ENVELOPE *e; 742 { 743 int r; 744 745 SmtpPhase = "client RSET"; 746 smtpmessage("RSET", m, mci); 747 r = reply(m, mci, e, TimeOuts.to_rset, NULL); 748 if (r < 0) 749 mci->mci_state = MCIS_ERROR; 750 else if (REPLYTYPE(r) == 2) 751 { 752 mci->mci_state = MCIS_OPEN; 753 return; 754 } 755 smtpquit(m, mci, e); 756 } 757 /* 758 ** SMTPPROBE -- check the connection state 759 */ 760 761 smtpprobe(mci) 762 register MCI *mci; 763 { 764 int r; 765 MAILER *m = mci->mci_mailer; 766 extern ENVELOPE BlankEnvelope; 767 ENVELOPE *e = &BlankEnvelope; 768 769 SmtpPhase = "client probe"; 770 smtpmessage("RSET", m, mci); 771 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 772 if (r < 0 || REPLYTYPE(r) != 2) 773 smtpquit(m, mci, e); 774 return r; 775 } 776 /* 777 ** REPLY -- read arpanet reply 778 ** 779 ** Parameters: 780 ** m -- the mailer we are reading the reply from. 781 ** mci -- the mailer connection info structure. 782 ** e -- the current envelope. 783 ** timeout -- the timeout for reads. 784 ** pfunc -- processing function for second and subsequent 785 ** lines of response -- if null, no special 786 ** processing is done. 787 ** 788 ** Returns: 789 ** reply code it reads. 790 ** 791 ** Side Effects: 792 ** flushes the mail file. 793 */ 794 795 reply(m, mci, e, timeout, pfunc) 796 MAILER *m; 797 MCI *mci; 798 ENVELOPE *e; 799 time_t timeout; 800 void (*pfunc)(); 801 { 802 register char *bufp; 803 register int r; 804 bool firstline = TRUE; 805 char junkbuf[MAXLINE]; 806 807 if (mci->mci_out != NULL) 808 (void) fflush(mci->mci_out); 809 810 if (tTd(18, 1)) 811 printf("reply\n"); 812 813 /* 814 ** Read the input line, being careful not to hang. 815 */ 816 817 for (bufp = SmtpReplyBuffer;; bufp = junkbuf) 818 { 819 register char *p; 820 extern time_t curtime(); 821 822 /* actually do the read */ 823 if (e->e_xfp != NULL) 824 (void) fflush(e->e_xfp); /* for debugging */ 825 826 /* if we are in the process of closing just give the code */ 827 if (mci->mci_state == MCIS_CLOSED) 828 return (SMTPCLOSING); 829 830 if (mci->mci_out != NULL) 831 fflush(mci->mci_out); 832 833 /* get the line from the other side */ 834 p = sfgets(bufp, MAXLINE, mci->mci_in, timeout, SmtpPhase); 835 mci->mci_lastuse = curtime(); 836 837 if (p == NULL) 838 { 839 bool oldholderrs; 840 extern char MsgBuf[]; /* err.c */ 841 842 /* if the remote end closed early, fake an error */ 843 if (errno == 0) 844 # ifdef ECONNRESET 845 errno = ECONNRESET; 846 # else /* ECONNRESET */ 847 errno = EPIPE; 848 # endif /* ECONNRESET */ 849 850 mci->mci_errno = errno; 851 mci->mci_exitstat = EX_TEMPFAIL; 852 oldholderrs = HoldErrs; 853 HoldErrs = TRUE; 854 usrerr("451 reply: read error from %s", mci->mci_host); 855 856 /* if debugging, pause so we can see state */ 857 if (tTd(18, 100)) 858 pause(); 859 mci->mci_state = MCIS_ERROR; 860 smtpquit(m, mci, e); 861 #ifdef XDEBUG 862 { 863 char wbuf[MAXLINE]; 864 char *p = wbuf; 865 if (e->e_to != NULL) 866 { 867 sprintf(p, "%s... ", e->e_to); 868 p += strlen(p); 869 } 870 sprintf(p, "reply(%s) during %s", 871 mci->mci_host, SmtpPhase); 872 checkfd012(wbuf); 873 } 874 #endif 875 HoldErrs = oldholderrs; 876 return (-1); 877 } 878 fixcrlf(bufp, TRUE); 879 880 /* EHLO failure is not a real error */ 881 if (e->e_xfp != NULL && (bufp[0] == '4' || 882 (bufp[0] == '5' && strncmp(SmtpMsgBuffer, "EHLO", 4) != 0))) 883 { 884 /* serious error -- log the previous command */ 885 if (SmtpNeedIntro) 886 { 887 /* inform user who we are chatting with */ 888 fprintf(CurEnv->e_xfp, 889 "... while talking to %s:\n", 890 CurHostName); 891 SmtpNeedIntro = FALSE; 892 } 893 if (SmtpMsgBuffer[0] != '\0') 894 fprintf(e->e_xfp, ">>> %s\n", SmtpMsgBuffer); 895 SmtpMsgBuffer[0] = '\0'; 896 897 /* now log the message as from the other side */ 898 fprintf(e->e_xfp, "<<< %s\n", bufp); 899 } 900 901 /* display the input for verbose mode */ 902 if (Verbose) 903 nmessage("050 %s", bufp); 904 905 /* process the line */ 906 if (pfunc != NULL) 907 (*pfunc)(bufp, firstline, m, mci, e); 908 909 firstline = FALSE; 910 911 /* if continuation is required, we can go on */ 912 if (bufp[3] == '-') 913 continue; 914 915 /* ignore improperly formated input */ 916 if (!(isascii(bufp[0]) && isdigit(bufp[0]))) 917 continue; 918 919 /* decode the reply code */ 920 r = atoi(bufp); 921 922 /* extra semantics: 0xx codes are "informational" */ 923 if (r >= 100) 924 break; 925 } 926 927 /* 928 ** Now look at SmtpReplyBuffer -- only care about the first 929 ** line of the response from here on out. 930 */ 931 932 /* save temporary failure messages for posterity */ 933 if (SmtpReplyBuffer[0] == '4' && SmtpError[0] == '\0') 934 (void) strcpy(SmtpError, SmtpReplyBuffer); 935 936 /* reply code 421 is "Service Shutting Down" */ 937 if (r == SMTPCLOSING && mci->mci_state != MCIS_SSD) 938 { 939 /* send the quit protocol */ 940 mci->mci_state = MCIS_SSD; 941 smtpquit(m, mci, e); 942 } 943 944 return (r); 945 } 946 /* 947 ** SMTPMESSAGE -- send message to server 948 ** 949 ** Parameters: 950 ** f -- format 951 ** m -- the mailer to control formatting. 952 ** a, b, c -- parameters 953 ** 954 ** Returns: 955 ** none. 956 ** 957 ** Side Effects: 958 ** writes message to mci->mci_out. 959 */ 960 961 /*VARARGS1*/ 962 #ifdef __STDC__ 963 smtpmessage(char *f, MAILER *m, MCI *mci, ...) 964 #else 965 smtpmessage(f, m, mci, va_alist) 966 char *f; 967 MAILER *m; 968 MCI *mci; 969 va_dcl 970 #endif 971 { 972 VA_LOCAL_DECL 973 974 VA_START(mci); 975 (void) vsprintf(SmtpMsgBuffer, f, ap); 976 VA_END; 977 978 if (tTd(18, 1) || Verbose) 979 nmessage(">>> %s", SmtpMsgBuffer); 980 if (TrafficLogFile != NULL) 981 fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), SmtpMsgBuffer); 982 if (mci->mci_out != NULL) 983 { 984 fprintf(mci->mci_out, "%s%s", SmtpMsgBuffer, 985 m == NULL ? "\r\n" : m->m_eol); 986 } 987 else if (tTd(18, 1)) 988 { 989 printf("smtpmessage: NULL mci_out\n"); 990 } 991 } 992 993 # endif /* SMTP */ 994