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 8.32 (Berkeley) 12/10/94 (with SMTP)"; 14 #else 15 static char sccsid[] = "@(#)usersmtp.c 8.32 (Berkeley) 12/10/94 (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 !bitset(EF_HAS8BIT, e->e_flags) || 342 (e->e_bodytype != NULL && 343 strcasecmp(e->e_bodytype, "7bit") == 0)) 344 { 345 /* just pass it through */ 346 } 347 else if (bitset(MM_CVTMIME, MimeMode) && 348 (e->e_bodytype != NULL || !bitset(MM_PASS8BIT, MimeMode))) 349 { 350 /* must convert from 8bit MIME format to 7bit encoded */ 351 mci->mci_flags |= MCIF_CVT8TO7; 352 } 353 else if (!bitset(MM_PASS8BIT, MimeMode)) 354 { 355 /* cannot just send a 8-bit version */ 356 usrerr("%s does not support 8BITMIME", mci->mci_host); 357 return EX_DATAERR; 358 } 359 360 if (bitset(MCIF_DSN, mci->mci_flags)) 361 { 362 if (e->e_envid != NULL) 363 { 364 strcat(optbuf, " ENVID="); 365 strcat(optbuf, e->e_envid); 366 } 367 if (e->e_omts != NULL) 368 { 369 strcat(optbuf, " OMTS="); 370 strcat(optbuf, e->e_omts); 371 } 372 } 373 374 /* 375 ** Send the MAIL command. 376 ** Designates the sender. 377 */ 378 379 mci->mci_state = MCIS_ACTIVE; 380 381 if (bitset(EF_RESPONSE, e->e_flags) && 382 !bitnset(M_NO_NULL_FROM, m->m_flags)) 383 (void) strcpy(buf, ""); 384 else 385 expand("\201g", buf, &buf[sizeof buf - 1], e); 386 if (buf[0] == '<') 387 { 388 /* strip off <angle brackets> (put back on below) */ 389 bufp = &buf[strlen(buf) - 1]; 390 if (*bufp == '>') 391 *bufp = '\0'; 392 bufp = &buf[1]; 393 } 394 else 395 bufp = buf; 396 if (bitnset(M_LOCALMAILER, e->e_from.q_mailer->m_flags) || 397 !bitnset(M_FROMPATH, m->m_flags)) 398 { 399 smtpmessage("MAIL From:<%s>%s", m, mci, bufp, optbuf); 400 } 401 else 402 { 403 smtpmessage("MAIL From:<@%s%c%s>%s", m, mci, MyHostName, 404 *bufp == '@' ? ',' : ':', bufp, optbuf); 405 } 406 SmtpPhase = mci->mci_phase = "client MAIL"; 407 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 408 r = reply(m, mci, e, TimeOuts.to_mail, NULL); 409 if (r < 0 || REPLYTYPE(r) == 4) 410 { 411 mci->mci_exitstat = EX_TEMPFAIL; 412 mci->mci_errno = errno; 413 smtpquit(m, mci, e); 414 return EX_TEMPFAIL; 415 } 416 else if (r == 250) 417 { 418 return EX_OK; 419 } 420 else if (r == 501 || r == 553) 421 { 422 /* syntax error in arguments */ 423 smtpquit(m, mci, e); 424 return EX_DATAERR; 425 } 426 else if (r == 552) 427 { 428 /* signal service unavailable */ 429 smtpquit(m, mci, e); 430 return EX_UNAVAILABLE; 431 } 432 433 #ifdef LOG 434 if (LogLevel > 1) 435 { 436 syslog(LOG_CRIT, "%s: %s: SMTP MAIL protocol error: %s", 437 e->e_id, mci->mci_host, SmtpReplyBuffer); 438 } 439 #endif 440 441 /* protocol error -- close up */ 442 smtpquit(m, mci, e); 443 return EX_PROTOCOL; 444 } 445 /* 446 ** SMTPRCPT -- designate recipient. 447 ** 448 ** Parameters: 449 ** to -- address of recipient. 450 ** m -- the mailer we are sending to. 451 ** mci -- the connection info for this transaction. 452 ** e -- the envelope for this transaction. 453 ** 454 ** Returns: 455 ** exit status corresponding to recipient status. 456 ** 457 ** Side Effects: 458 ** Sends the mail via SMTP. 459 */ 460 461 smtprcpt(to, m, mci, e) 462 ADDRESS *to; 463 register MAILER *m; 464 MCI *mci; 465 ENVELOPE *e; 466 { 467 register int r; 468 char optbuf[MAXLINE]; 469 470 strcpy(optbuf, ""); 471 if (bitset(MCIF_DSN, mci->mci_flags)) 472 { 473 bool firstone = TRUE; 474 475 /* NOTIFY= parameter */ 476 strcat(optbuf, " NOTIFY="); 477 if (bitset(QPINGONSUCCESS, to->q_flags)) 478 { 479 strcat(optbuf, "SUCCESS"); 480 firstone = FALSE; 481 } 482 if (bitset(QPINGONFAILURE, to->q_flags)) 483 { 484 if (!firstone) 485 strcat(optbuf, ","); 486 strcat(optbuf, "FAILURE"); 487 firstone = FALSE; 488 } 489 if (bitset(QPINGONDELAY, to->q_flags)) 490 { 491 if (!firstone) 492 strcat(optbuf, ","); 493 strcat(optbuf, "DELAY"); 494 firstone = FALSE; 495 } 496 if (firstone) 497 strcat(optbuf, "NEVER"); 498 499 /* RET= parameter */ 500 if (bitset(QHAS_RET_PARAM, to->q_flags)) 501 { 502 strcat(optbuf, " RET="); 503 if (bitset(QRET_HDRS, to->q_flags)) 504 strcat(optbuf, "HDRS"); 505 else 506 strcat(optbuf, "FULL"); 507 } 508 509 /* ORCPT= parameter */ 510 if (to->q_orcpt != NULL) 511 { 512 strcat(optbuf, " ORCPT="); 513 strcat(optbuf, to->q_orcpt); 514 } 515 } 516 else if (bitset(QPINGONSUCCESS, to->q_flags)) 517 { 518 to->q_flags |= QRELAYED; 519 fprintf(e->e_xfp, "%s... relayed; expect no further notifications\n", 520 to->q_paddr); 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 int 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, 0); 637 (*e->e_putbody)(mci, e, NULL, 0); 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 int 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