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 8.39 (Berkeley) 03/21/95 (with SMTP)"; 14 #else 15 static char sccsid[] = "@(#)usersmtp.c 8.39 (Berkeley) 03/21/95 (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) < 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-3") == 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 bool firstone = TRUE; 490 491 /* NOTIFY= parameter */ 492 strcat(optbuf, " NOTIFY="); 493 if (bitset(QPINGONSUCCESS, to->q_flags)) 494 { 495 strcat(optbuf, "SUCCESS"); 496 firstone = FALSE; 497 } 498 if (bitset(QPINGONFAILURE, to->q_flags)) 499 { 500 if (!firstone) 501 strcat(optbuf, ","); 502 strcat(optbuf, "FAILURE"); 503 firstone = FALSE; 504 } 505 if (bitset(QPINGONDELAY, to->q_flags)) 506 { 507 if (!firstone) 508 strcat(optbuf, ","); 509 strcat(optbuf, "DELAY"); 510 firstone = FALSE; 511 } 512 if (firstone) 513 strcat(optbuf, "NEVER"); 514 515 /* ORCPT= parameter */ 516 if (to->q_orcpt != NULL) 517 { 518 strcat(optbuf, " ORCPT="); 519 strcat(optbuf, to->q_orcpt); 520 } 521 } 522 523 smtpmessage("RCPT To:<%s>%s", m, mci, to->q_user, optbuf); 524 525 SmtpPhase = mci->mci_phase = "client RCPT"; 526 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 527 r = reply(m, mci, e, TimeOuts.to_rcpt, NULL); 528 setstatus(to, SmtpReplyBuffer); 529 if (r < 0 || REPLYTYPE(r) == 4) 530 return (EX_TEMPFAIL); 531 else if (REPLYTYPE(r) == 2) 532 return (EX_OK); 533 else if (r == 550 || r == 551 || r == 553) 534 return (EX_NOUSER); 535 else if (r == 552 || r == 554) 536 return (EX_UNAVAILABLE); 537 538 #ifdef LOG 539 if (LogLevel > 1) 540 { 541 syslog(LOG_CRIT, "%s: %s: SMTP RCPT protocol error: %s", 542 e->e_id, mci->mci_host, SmtpReplyBuffer); 543 } 544 #endif 545 546 return (EX_PROTOCOL); 547 } 548 /* 549 ** SMTPDATA -- send the data and clean up the transaction. 550 ** 551 ** Parameters: 552 ** m -- mailer being sent to. 553 ** e -- the envelope for this message. 554 ** 555 ** Returns: 556 ** exit status corresponding to DATA command. 557 ** 558 ** Side Effects: 559 ** none. 560 */ 561 562 static jmp_buf CtxDataTimeout; 563 static void datatimeout(); 564 565 smtpdata(m, mci, e) 566 struct mailer *m; 567 register MCI *mci; 568 register ENVELOPE *e; 569 { 570 register int r; 571 register EVENT *ev; 572 time_t timeout; 573 574 /* 575 ** Send the data. 576 ** First send the command and check that it is ok. 577 ** Then send the data. 578 ** Follow it up with a dot to terminate. 579 ** Finally get the results of the transaction. 580 */ 581 582 /* send the command and check ok to proceed */ 583 smtpmessage("DATA", m, mci); 584 SmtpPhase = mci->mci_phase = "client DATA 354"; 585 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 586 r = reply(m, mci, e, TimeOuts.to_datainit, NULL); 587 if (r < 0 || REPLYTYPE(r) == 4) 588 { 589 smtpquit(m, mci, e); 590 return (EX_TEMPFAIL); 591 } 592 else if (r == 554) 593 { 594 smtprset(m, mci, e); 595 return (EX_UNAVAILABLE); 596 } 597 else if (r != 354) 598 { 599 #ifdef LOG 600 if (LogLevel > 1) 601 { 602 syslog(LOG_CRIT, "%s: %s: SMTP DATA-1 protocol error: %s", 603 e->e_id, mci->mci_host, SmtpReplyBuffer); 604 } 605 #endif 606 smtprset(m, mci, e); 607 return (EX_PROTOCOL); 608 } 609 610 /* 611 ** Set timeout around data writes. Make it at least large 612 ** enough for DNS timeouts on all recipients plus some fudge 613 ** factor. The main thing is that it should not be infinite. 614 */ 615 616 if (setjmp(CtxDataTimeout) != 0) 617 { 618 mci->mci_errno = errno; 619 mci->mci_exitstat = EX_TEMPFAIL; 620 mci->mci_state = MCIS_ERROR; 621 syserr("451 timeout writing message to %s", mci->mci_host); 622 smtpquit(m, mci, e); 623 return EX_TEMPFAIL; 624 } 625 626 timeout = e->e_msgsize / 16; 627 if (timeout < (time_t) 60) 628 timeout = (time_t) 60; 629 timeout += e->e_nrcpts * 90; 630 ev = setevent(timeout, datatimeout, 0); 631 632 /* 633 ** Output the actual message. 634 */ 635 636 (*e->e_puthdr)(mci, e->e_header, e); 637 (*e->e_putbody)(mci, e, NULL); 638 639 /* 640 ** Cleanup after sending message. 641 */ 642 643 clrevent(ev); 644 645 if (ferror(mci->mci_out)) 646 { 647 /* error during processing -- don't send the dot */ 648 mci->mci_errno = EIO; 649 mci->mci_exitstat = EX_IOERR; 650 mci->mci_state = MCIS_ERROR; 651 smtpquit(m, mci, e); 652 return EX_IOERR; 653 } 654 655 /* terminate the message */ 656 fprintf(mci->mci_out, ".%s", m->m_eol); 657 if (TrafficLogFile != NULL) 658 fprintf(TrafficLogFile, "%05d >>> .\n", getpid()); 659 if (Verbose) 660 nmessage(">>> ."); 661 662 /* check for the results of the transaction */ 663 SmtpPhase = mci->mci_phase = "client DATA 250"; 664 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 665 r = reply(m, mci, e, TimeOuts.to_datafinal, NULL); 666 if (r < 0) 667 { 668 smtpquit(m, mci, e); 669 return (EX_TEMPFAIL); 670 } 671 mci->mci_state = MCIS_OPEN; 672 e->e_statmsg = newstr(&SmtpReplyBuffer[4]); 673 if (REPLYTYPE(r) == 4) 674 return (EX_TEMPFAIL); 675 else if (r == 250) 676 return (EX_OK); 677 else if (r == 552 || r == 554) 678 return (EX_UNAVAILABLE); 679 #ifdef LOG 680 if (LogLevel > 1) 681 { 682 syslog(LOG_CRIT, "%s: %s: SMTP DATA-2 protocol error: %s", 683 e->e_id, mci->mci_host, SmtpReplyBuffer); 684 } 685 #endif 686 return (EX_PROTOCOL); 687 } 688 689 690 static void 691 datatimeout() 692 { 693 longjmp(CtxDataTimeout, 1); 694 } 695 /* 696 ** SMTPQUIT -- close the SMTP connection. 697 ** 698 ** Parameters: 699 ** m -- a pointer to the mailer. 700 ** 701 ** Returns: 702 ** none. 703 ** 704 ** Side Effects: 705 ** sends the final protocol and closes the connection. 706 */ 707 708 smtpquit(m, mci, e) 709 register MAILER *m; 710 register MCI *mci; 711 ENVELOPE *e; 712 { 713 bool oldSuprErrs = SuprErrs; 714 715 /* 716 ** Suppress errors here -- we may be processing a different 717 ** job when we do the quit connection, and we don't want the 718 ** new job to be penalized for something that isn't it's 719 ** problem. 720 */ 721 722 SuprErrs = TRUE; 723 724 /* send the quit message if we haven't gotten I/O error */ 725 if (mci->mci_state != MCIS_ERROR) 726 { 727 SmtpPhase = "client QUIT"; 728 smtpmessage("QUIT", m, mci); 729 (void) reply(m, mci, e, TimeOuts.to_quit, NULL); 730 SuprErrs = oldSuprErrs; 731 if (mci->mci_state == MCIS_CLOSED) 732 { 733 SuprErrs = oldSuprErrs; 734 return; 735 } 736 } 737 738 /* now actually close the connection and pick up the zombie */ 739 (void) endmailer(mci, e, NULL); 740 741 SuprErrs = oldSuprErrs; 742 } 743 /* 744 ** SMTPRSET -- send a RSET (reset) command 745 */ 746 747 smtprset(m, mci, e) 748 register MAILER *m; 749 register MCI *mci; 750 ENVELOPE *e; 751 { 752 int r; 753 754 SmtpPhase = "client RSET"; 755 smtpmessage("RSET", m, mci); 756 r = reply(m, mci, e, TimeOuts.to_rset, NULL); 757 if (r < 0) 758 mci->mci_state = MCIS_ERROR; 759 else if (REPLYTYPE(r) == 2) 760 { 761 mci->mci_state = MCIS_OPEN; 762 return; 763 } 764 smtpquit(m, mci, e); 765 } 766 /* 767 ** SMTPPROBE -- check the connection state 768 */ 769 770 smtpprobe(mci) 771 register MCI *mci; 772 { 773 int r; 774 MAILER *m = mci->mci_mailer; 775 extern ENVELOPE BlankEnvelope; 776 ENVELOPE *e = &BlankEnvelope; 777 778 SmtpPhase = "client probe"; 779 smtpmessage("RSET", m, mci); 780 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 781 if (r < 0 || REPLYTYPE(r) != 2) 782 smtpquit(m, mci, e); 783 return r; 784 } 785 /* 786 ** REPLY -- read arpanet reply 787 ** 788 ** Parameters: 789 ** m -- the mailer we are reading the reply from. 790 ** mci -- the mailer connection info structure. 791 ** e -- the current envelope. 792 ** timeout -- the timeout for reads. 793 ** pfunc -- processing function for second and subsequent 794 ** lines of response -- if null, no special 795 ** processing is done. 796 ** 797 ** Returns: 798 ** reply code it reads. 799 ** 800 ** Side Effects: 801 ** flushes the mail file. 802 */ 803 804 reply(m, mci, e, timeout, pfunc) 805 MAILER *m; 806 MCI *mci; 807 ENVELOPE *e; 808 time_t timeout; 809 void (*pfunc)(); 810 { 811 register char *bufp; 812 register int r; 813 bool firstline = TRUE; 814 char junkbuf[MAXLINE]; 815 816 if (mci->mci_out != NULL) 817 (void) fflush(mci->mci_out); 818 819 if (tTd(18, 1)) 820 printf("reply\n"); 821 822 /* 823 ** Read the input line, being careful not to hang. 824 */ 825 826 for (bufp = SmtpReplyBuffer;; bufp = junkbuf) 827 { 828 register char *p; 829 extern time_t curtime(); 830 831 /* actually do the read */ 832 if (e->e_xfp != NULL) 833 (void) fflush(e->e_xfp); /* for debugging */ 834 835 /* if we are in the process of closing just give the code */ 836 if (mci->mci_state == MCIS_CLOSED) 837 return (SMTPCLOSING); 838 839 if (mci->mci_out != NULL) 840 fflush(mci->mci_out); 841 842 /* get the line from the other side */ 843 p = sfgets(bufp, MAXLINE, mci->mci_in, timeout, SmtpPhase); 844 mci->mci_lastuse = curtime(); 845 846 if (p == NULL) 847 { 848 bool oldholderrs; 849 extern char MsgBuf[]; /* err.c */ 850 851 /* if the remote end closed early, fake an error */ 852 if (errno == 0) 853 # ifdef ECONNRESET 854 errno = ECONNRESET; 855 # else /* ECONNRESET */ 856 errno = EPIPE; 857 # endif /* ECONNRESET */ 858 859 mci->mci_errno = errno; 860 mci->mci_exitstat = EX_TEMPFAIL; 861 oldholderrs = HoldErrs; 862 HoldErrs = TRUE; 863 usrerr("451 reply: read error from %s", mci->mci_host); 864 865 /* if debugging, pause so we can see state */ 866 if (tTd(18, 100)) 867 pause(); 868 mci->mci_state = MCIS_ERROR; 869 smtpquit(m, mci, e); 870 #ifdef XDEBUG 871 { 872 char wbuf[MAXLINE]; 873 char *p = wbuf; 874 if (e->e_to != NULL) 875 { 876 sprintf(p, "%s... ", e->e_to); 877 p += strlen(p); 878 } 879 sprintf(p, "reply(%s) during %s", 880 mci->mci_host, SmtpPhase); 881 checkfd012(wbuf); 882 } 883 #endif 884 HoldErrs = oldholderrs; 885 return (-1); 886 } 887 fixcrlf(bufp, TRUE); 888 889 /* EHLO failure is not a real error */ 890 if (e->e_xfp != NULL && (bufp[0] == '4' || 891 (bufp[0] == '5' && strncmp(SmtpMsgBuffer, "EHLO", 4) != 0))) 892 { 893 /* serious error -- log the previous command */ 894 if (SmtpNeedIntro) 895 { 896 /* inform user who we are chatting with */ 897 fprintf(CurEnv->e_xfp, 898 "... while talking to %s:\n", 899 CurHostName); 900 SmtpNeedIntro = FALSE; 901 } 902 if (SmtpMsgBuffer[0] != '\0') 903 fprintf(e->e_xfp, ">>> %s\n", SmtpMsgBuffer); 904 SmtpMsgBuffer[0] = '\0'; 905 906 /* now log the message as from the other side */ 907 fprintf(e->e_xfp, "<<< %s\n", bufp); 908 } 909 910 /* display the input for verbose mode */ 911 if (Verbose) 912 nmessage("050 %s", bufp); 913 914 /* process the line */ 915 if (pfunc != NULL) 916 (*pfunc)(bufp, firstline, m, mci, e); 917 918 firstline = FALSE; 919 920 /* if continuation is required, we can go on */ 921 if (bufp[3] == '-') 922 continue; 923 924 /* ignore improperly formated input */ 925 if (!(isascii(bufp[0]) && isdigit(bufp[0]))) 926 continue; 927 928 /* decode the reply code */ 929 r = atoi(bufp); 930 931 /* extra semantics: 0xx codes are "informational" */ 932 if (r >= 100) 933 break; 934 } 935 936 /* 937 ** Now look at SmtpReplyBuffer -- only care about the first 938 ** line of the response from here on out. 939 */ 940 941 /* save temporary failure messages for posterity */ 942 if (SmtpReplyBuffer[0] == '4' && SmtpError[0] == '\0') 943 (void) strcpy(SmtpError, SmtpReplyBuffer); 944 945 /* reply code 421 is "Service Shutting Down" */ 946 if (r == SMTPCLOSING && mci->mci_state != MCIS_SSD) 947 { 948 /* send the quit protocol */ 949 mci->mci_state = MCIS_SSD; 950 smtpquit(m, mci, e); 951 } 952 953 return (r); 954 } 955 /* 956 ** SMTPMESSAGE -- send message to server 957 ** 958 ** Parameters: 959 ** f -- format 960 ** m -- the mailer to control formatting. 961 ** a, b, c -- parameters 962 ** 963 ** Returns: 964 ** none. 965 ** 966 ** Side Effects: 967 ** writes message to mci->mci_out. 968 */ 969 970 /*VARARGS1*/ 971 #ifdef __STDC__ 972 smtpmessage(char *f, MAILER *m, MCI *mci, ...) 973 #else 974 smtpmessage(f, m, mci, va_alist) 975 char *f; 976 MAILER *m; 977 MCI *mci; 978 va_dcl 979 #endif 980 { 981 VA_LOCAL_DECL 982 983 VA_START(mci); 984 (void) vsprintf(SmtpMsgBuffer, f, ap); 985 VA_END; 986 987 if (tTd(18, 1) || Verbose) 988 nmessage(">>> %s", SmtpMsgBuffer); 989 if (TrafficLogFile != NULL) 990 fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), SmtpMsgBuffer); 991 if (mci->mci_out != NULL) 992 { 993 fprintf(mci->mci_out, "%s%s", SmtpMsgBuffer, 994 m == NULL ? "\r\n" : m->m_eol); 995 } 996 else if (tTd(18, 1)) 997 { 998 printf("smtpmessage: NULL mci_out\n"); 999 } 1000 } 1001 1002 # endif /* SMTP */ 1003