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 8.34 (Berkeley) 02/05/95 (with SMTP)"; 14 #else 15 static char sccsid[] = "@(#)usersmtp.c 8.34 (Berkeley) 02/05/95 (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]; 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 - 1], 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 else if (bitset(QPINGONSUCCESS, to->q_flags)) 514 { 515 to->q_flags |= QRELAYED; 516 fprintf(e->e_xfp, "%s... relayed; expect no further notifications\n", 517 to->q_paddr); 518 } 519 520 smtpmessage("RCPT To:<%s>%s", m, mci, to->q_user, optbuf); 521 522 SmtpPhase = mci->mci_phase = "client RCPT"; 523 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 524 r = reply(m, mci, e, TimeOuts.to_rcpt, NULL); 525 setstatus(to, SmtpReplyBuffer); 526 if (r < 0 || REPLYTYPE(r) == 4) 527 return (EX_TEMPFAIL); 528 else if (REPLYTYPE(r) == 2) 529 return (EX_OK); 530 else if (r == 550 || r == 551 || r == 553) 531 return (EX_NOUSER); 532 else if (r == 552 || r == 554) 533 return (EX_UNAVAILABLE); 534 535 #ifdef LOG 536 if (LogLevel > 1) 537 { 538 syslog(LOG_CRIT, "%s: %s: SMTP RCPT protocol error: %s", 539 e->e_id, mci->mci_host, SmtpReplyBuffer); 540 } 541 #endif 542 543 return (EX_PROTOCOL); 544 } 545 /* 546 ** SMTPDATA -- send the data and clean up the transaction. 547 ** 548 ** Parameters: 549 ** m -- mailer being sent to. 550 ** e -- the envelope for this message. 551 ** 552 ** Returns: 553 ** exit status corresponding to DATA command. 554 ** 555 ** Side Effects: 556 ** none. 557 */ 558 559 static jmp_buf CtxDataTimeout; 560 static int datatimeout(); 561 562 smtpdata(m, mci, e) 563 struct mailer *m; 564 register MCI *mci; 565 register ENVELOPE *e; 566 { 567 register int r; 568 register EVENT *ev; 569 time_t timeout; 570 571 /* 572 ** Send the data. 573 ** First send the command and check that it is ok. 574 ** Then send the data. 575 ** Follow it up with a dot to terminate. 576 ** Finally get the results of the transaction. 577 */ 578 579 /* send the command and check ok to proceed */ 580 smtpmessage("DATA", m, mci); 581 SmtpPhase = mci->mci_phase = "client DATA 354"; 582 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 583 r = reply(m, mci, e, TimeOuts.to_datainit, NULL); 584 if (r < 0 || REPLYTYPE(r) == 4) 585 { 586 smtpquit(m, mci, e); 587 return (EX_TEMPFAIL); 588 } 589 else if (r == 554) 590 { 591 smtprset(m, mci, e); 592 return (EX_UNAVAILABLE); 593 } 594 else if (r != 354) 595 { 596 #ifdef LOG 597 if (LogLevel > 1) 598 { 599 syslog(LOG_CRIT, "%s: %s: SMTP DATA-1 protocol error: %s", 600 e->e_id, mci->mci_host, SmtpReplyBuffer); 601 } 602 #endif 603 smtprset(m, mci, e); 604 return (EX_PROTOCOL); 605 } 606 607 /* 608 ** Set timeout around data writes. Make it at least large 609 ** enough for DNS timeouts on all recipients plus some fudge 610 ** factor. The main thing is that it should not be infinite. 611 */ 612 613 if (setjmp(CtxDataTimeout) != 0) 614 { 615 mci->mci_errno = errno; 616 mci->mci_exitstat = EX_TEMPFAIL; 617 mci->mci_state = MCIS_ERROR; 618 syserr("451 timeout writing message to %s", mci->mci_host); 619 smtpquit(m, mci, e); 620 return EX_TEMPFAIL; 621 } 622 623 timeout = e->e_msgsize / 16; 624 if (timeout < (time_t) 60) 625 timeout = (time_t) 60; 626 timeout += e->e_nrcpts * 90; 627 ev = setevent(timeout, datatimeout, 0); 628 629 /* 630 ** Output the actual message. 631 */ 632 633 (*e->e_puthdr)(mci, e->e_header, e); 634 (*e->e_putbody)(mci, e, NULL); 635 636 /* 637 ** Cleanup after sending message. 638 */ 639 640 clrevent(ev); 641 642 if (ferror(mci->mci_out)) 643 { 644 /* error during processing -- don't send the dot */ 645 mci->mci_errno = EIO; 646 mci->mci_exitstat = EX_IOERR; 647 mci->mci_state = MCIS_ERROR; 648 smtpquit(m, mci, e); 649 return EX_IOERR; 650 } 651 652 /* terminate the message */ 653 fprintf(mci->mci_out, ".%s", m->m_eol); 654 if (TrafficLogFile != NULL) 655 fprintf(TrafficLogFile, "%05d >>> .\n", getpid()); 656 if (Verbose) 657 nmessage(">>> ."); 658 659 /* check for the results of the transaction */ 660 SmtpPhase = mci->mci_phase = "client DATA 250"; 661 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 662 r = reply(m, mci, e, TimeOuts.to_datafinal, NULL); 663 if (r < 0) 664 { 665 smtpquit(m, mci, e); 666 return (EX_TEMPFAIL); 667 } 668 mci->mci_state = MCIS_OPEN; 669 e->e_statmsg = newstr(&SmtpReplyBuffer[4]); 670 if (REPLYTYPE(r) == 4) 671 return (EX_TEMPFAIL); 672 else if (r == 250) 673 return (EX_OK); 674 else if (r == 552 || r == 554) 675 return (EX_UNAVAILABLE); 676 #ifdef LOG 677 if (LogLevel > 1) 678 { 679 syslog(LOG_CRIT, "%s: %s: SMTP DATA-2 protocol error: %s", 680 e->e_id, mci->mci_host, SmtpReplyBuffer); 681 } 682 #endif 683 return (EX_PROTOCOL); 684 } 685 686 687 static int 688 datatimeout() 689 { 690 longjmp(CtxDataTimeout, 1); 691 } 692 /* 693 ** SMTPQUIT -- close the SMTP connection. 694 ** 695 ** Parameters: 696 ** m -- a pointer to the mailer. 697 ** 698 ** Returns: 699 ** none. 700 ** 701 ** Side Effects: 702 ** sends the final protocol and closes the connection. 703 */ 704 705 smtpquit(m, mci, e) 706 register MAILER *m; 707 register MCI *mci; 708 ENVELOPE *e; 709 { 710 bool oldSuprErrs = SuprErrs; 711 712 /* 713 ** Suppress errors here -- we may be processing a different 714 ** job when we do the quit connection, and we don't want the 715 ** new job to be penalized for something that isn't it's 716 ** problem. 717 */ 718 719 SuprErrs = TRUE; 720 721 /* send the quit message if we haven't gotten I/O error */ 722 if (mci->mci_state != MCIS_ERROR) 723 { 724 SmtpPhase = "client QUIT"; 725 smtpmessage("QUIT", m, mci); 726 (void) reply(m, mci, e, TimeOuts.to_quit, NULL); 727 SuprErrs = oldSuprErrs; 728 if (mci->mci_state == MCIS_CLOSED) 729 { 730 SuprErrs = oldSuprErrs; 731 return; 732 } 733 } 734 735 /* now actually close the connection and pick up the zombie */ 736 (void) endmailer(mci, e, NULL); 737 738 SuprErrs = oldSuprErrs; 739 } 740 /* 741 ** SMTPRSET -- send a RSET (reset) command 742 */ 743 744 smtprset(m, mci, e) 745 register MAILER *m; 746 register MCI *mci; 747 ENVELOPE *e; 748 { 749 int r; 750 751 SmtpPhase = "client RSET"; 752 smtpmessage("RSET", m, mci); 753 r = reply(m, mci, e, TimeOuts.to_rset, NULL); 754 if (r < 0) 755 mci->mci_state = MCIS_ERROR; 756 else if (REPLYTYPE(r) == 2) 757 { 758 mci->mci_state = MCIS_OPEN; 759 return; 760 } 761 smtpquit(m, mci, e); 762 } 763 /* 764 ** SMTPPROBE -- check the connection state 765 */ 766 767 smtpprobe(mci) 768 register MCI *mci; 769 { 770 int r; 771 MAILER *m = mci->mci_mailer; 772 extern ENVELOPE BlankEnvelope; 773 ENVELOPE *e = &BlankEnvelope; 774 775 SmtpPhase = "client probe"; 776 smtpmessage("RSET", m, mci); 777 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 778 if (r < 0 || REPLYTYPE(r) != 2) 779 smtpquit(m, mci, e); 780 return r; 781 } 782 /* 783 ** REPLY -- read arpanet reply 784 ** 785 ** Parameters: 786 ** m -- the mailer we are reading the reply from. 787 ** mci -- the mailer connection info structure. 788 ** e -- the current envelope. 789 ** timeout -- the timeout for reads. 790 ** pfunc -- processing function for second and subsequent 791 ** lines of response -- if null, no special 792 ** processing is done. 793 ** 794 ** Returns: 795 ** reply code it reads. 796 ** 797 ** Side Effects: 798 ** flushes the mail file. 799 */ 800 801 reply(m, mci, e, timeout, pfunc) 802 MAILER *m; 803 MCI *mci; 804 ENVELOPE *e; 805 time_t timeout; 806 void (*pfunc)(); 807 { 808 register char *bufp; 809 register int r; 810 bool firstline = TRUE; 811 char junkbuf[MAXLINE]; 812 813 if (mci->mci_out != NULL) 814 (void) fflush(mci->mci_out); 815 816 if (tTd(18, 1)) 817 printf("reply\n"); 818 819 /* 820 ** Read the input line, being careful not to hang. 821 */ 822 823 for (bufp = SmtpReplyBuffer;; bufp = junkbuf) 824 { 825 register char *p; 826 extern time_t curtime(); 827 828 /* actually do the read */ 829 if (e->e_xfp != NULL) 830 (void) fflush(e->e_xfp); /* for debugging */ 831 832 /* if we are in the process of closing just give the code */ 833 if (mci->mci_state == MCIS_CLOSED) 834 return (SMTPCLOSING); 835 836 if (mci->mci_out != NULL) 837 fflush(mci->mci_out); 838 839 /* get the line from the other side */ 840 p = sfgets(bufp, MAXLINE, mci->mci_in, timeout, SmtpPhase); 841 mci->mci_lastuse = curtime(); 842 843 if (p == NULL) 844 { 845 bool oldholderrs; 846 extern char MsgBuf[]; /* err.c */ 847 848 /* if the remote end closed early, fake an error */ 849 if (errno == 0) 850 # ifdef ECONNRESET 851 errno = ECONNRESET; 852 # else /* ECONNRESET */ 853 errno = EPIPE; 854 # endif /* ECONNRESET */ 855 856 mci->mci_errno = errno; 857 mci->mci_exitstat = EX_TEMPFAIL; 858 oldholderrs = HoldErrs; 859 HoldErrs = TRUE; 860 usrerr("451 reply: read error from %s", mci->mci_host); 861 862 /* if debugging, pause so we can see state */ 863 if (tTd(18, 100)) 864 pause(); 865 mci->mci_state = MCIS_ERROR; 866 smtpquit(m, mci, e); 867 #ifdef XDEBUG 868 { 869 char wbuf[MAXLINE]; 870 char *p = wbuf; 871 if (e->e_to != NULL) 872 { 873 sprintf(p, "%s... ", e->e_to); 874 p += strlen(p); 875 } 876 sprintf(p, "reply(%s) during %s", 877 mci->mci_host, SmtpPhase); 878 checkfd012(wbuf); 879 } 880 #endif 881 HoldErrs = oldholderrs; 882 return (-1); 883 } 884 fixcrlf(bufp, TRUE); 885 886 /* EHLO failure is not a real error */ 887 if (e->e_xfp != NULL && (bufp[0] == '4' || 888 (bufp[0] == '5' && strncmp(SmtpMsgBuffer, "EHLO", 4) != 0))) 889 { 890 /* serious error -- log the previous command */ 891 if (SmtpNeedIntro) 892 { 893 /* inform user who we are chatting with */ 894 fprintf(CurEnv->e_xfp, 895 "... while talking to %s:\n", 896 CurHostName); 897 SmtpNeedIntro = FALSE; 898 } 899 if (SmtpMsgBuffer[0] != '\0') 900 fprintf(e->e_xfp, ">>> %s\n", SmtpMsgBuffer); 901 SmtpMsgBuffer[0] = '\0'; 902 903 /* now log the message as from the other side */ 904 fprintf(e->e_xfp, "<<< %s\n", bufp); 905 } 906 907 /* display the input for verbose mode */ 908 if (Verbose) 909 nmessage("050 %s", bufp); 910 911 /* process the line */ 912 if (pfunc != NULL) 913 (*pfunc)(bufp, firstline, m, mci, e); 914 915 firstline = FALSE; 916 917 /* if continuation is required, we can go on */ 918 if (bufp[3] == '-') 919 continue; 920 921 /* ignore improperly formated input */ 922 if (!(isascii(bufp[0]) && isdigit(bufp[0]))) 923 continue; 924 925 /* decode the reply code */ 926 r = atoi(bufp); 927 928 /* extra semantics: 0xx codes are "informational" */ 929 if (r >= 100) 930 break; 931 } 932 933 /* 934 ** Now look at SmtpReplyBuffer -- only care about the first 935 ** line of the response from here on out. 936 */ 937 938 /* save temporary failure messages for posterity */ 939 if (SmtpReplyBuffer[0] == '4' && SmtpError[0] == '\0') 940 (void) strcpy(SmtpError, SmtpReplyBuffer); 941 942 /* reply code 421 is "Service Shutting Down" */ 943 if (r == SMTPCLOSING && mci->mci_state != MCIS_SSD) 944 { 945 /* send the quit protocol */ 946 mci->mci_state = MCIS_SSD; 947 smtpquit(m, mci, e); 948 } 949 950 return (r); 951 } 952 /* 953 ** SMTPMESSAGE -- send message to server 954 ** 955 ** Parameters: 956 ** f -- format 957 ** m -- the mailer to control formatting. 958 ** a, b, c -- parameters 959 ** 960 ** Returns: 961 ** none. 962 ** 963 ** Side Effects: 964 ** writes message to mci->mci_out. 965 */ 966 967 /*VARARGS1*/ 968 #ifdef __STDC__ 969 smtpmessage(char *f, MAILER *m, MCI *mci, ...) 970 #else 971 smtpmessage(f, m, mci, va_alist) 972 char *f; 973 MAILER *m; 974 MCI *mci; 975 va_dcl 976 #endif 977 { 978 VA_LOCAL_DECL 979 980 VA_START(mci); 981 (void) vsprintf(SmtpMsgBuffer, f, ap); 982 VA_END; 983 984 if (tTd(18, 1) || Verbose) 985 nmessage(">>> %s", SmtpMsgBuffer); 986 if (TrafficLogFile != NULL) 987 fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), SmtpMsgBuffer); 988 if (mci->mci_out != NULL) 989 { 990 fprintf(mci->mci_out, "%s%s", SmtpMsgBuffer, 991 m == NULL ? "\r\n" : m->m_eol); 992 } 993 else if (tTd(18, 1)) 994 { 995 printf("smtpmessage: NULL mci_out\n"); 996 } 997 } 998 999 # endif /* SMTP */ 1000