1 /* 2 * Copyright (c) 1983, 1995 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 8.51 (Berkeley) 04/29/95 (with SMTP)"; 14 #else 15 static char sccsid[] = "@(#)usersmtp.c 8.51 (Berkeley) 04/29/95 (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) < (SIZE_T) 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-03") == 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 { 354 /* just pass it through */ 355 } 356 else if (bitset(MM_CVTMIME, MimeMode) && 357 (!bitset(MM_PASS8BIT, MimeMode) || 358 bitset(EF_IS_MIME, e->e_flags))) 359 { 360 /* must convert from 8bit MIME format to 7bit encoded */ 361 mci->mci_flags |= MCIF_CVT8TO7; 362 } 363 else if (!bitset(MM_PASS8BIT, MimeMode)) 364 { 365 /* cannot just send a 8-bit version */ 366 usrerr("%s does not support 8BITMIME", mci->mci_host); 367 mci->mci_status = "5.6.3"; 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 || r == 421) 426 { 427 /* communications failure/service shutting down */ 428 mci->mci_exitstat = EX_TEMPFAIL; 429 mci->mci_errno = errno; 430 smtpquit(m, mci, e); 431 return EX_TEMPFAIL; 432 } 433 else if (REPLYTYPE(r) == 4) 434 { 435 return EX_TEMPFAIL; 436 } 437 else if (r == 250) 438 { 439 return EX_OK; 440 } 441 else if (r == 501) 442 { 443 /* syntax error in arguments */ 444 mci->mci_status = "5.5.2"; 445 return EX_DATAERR; 446 } 447 else if (r == 553) 448 { 449 /* mailbox name not allowed */ 450 mci->mci_status = "5.1.3"; 451 return EX_DATAERR; 452 } 453 else if (r == 552) 454 { 455 /* exceeded storage allocation */ 456 mci->mci_status = "5.2.2"; 457 return EX_UNAVAILABLE; 458 } 459 460 #ifdef LOG 461 if (LogLevel > 1) 462 { 463 syslog(LOG_CRIT, "%s: %s: SMTP MAIL protocol error: %s", 464 e->e_id, mci->mci_host, SmtpReplyBuffer); 465 } 466 #endif 467 468 /* protocol error -- close up */ 469 smtpquit(m, mci, e); 470 return EX_PROTOCOL; 471 } 472 /* 473 ** SMTPRCPT -- designate recipient. 474 ** 475 ** Parameters: 476 ** to -- address of recipient. 477 ** m -- the mailer we are sending to. 478 ** mci -- the connection info for this transaction. 479 ** e -- the envelope for this transaction. 480 ** 481 ** Returns: 482 ** exit status corresponding to recipient status. 483 ** 484 ** Side Effects: 485 ** Sends the mail via SMTP. 486 */ 487 488 smtprcpt(to, m, mci, e) 489 ADDRESS *to; 490 register MAILER *m; 491 MCI *mci; 492 ENVELOPE *e; 493 { 494 register int r; 495 char optbuf[MAXLINE]; 496 extern char *smtptodsn(); 497 498 strcpy(optbuf, ""); 499 if (bitset(MCIF_DSN, mci->mci_flags)) 500 { 501 /* NOTIFY= parameter */ 502 if (bitset(QHASNOTIFY, to->q_flags) && 503 bitset(QPRIMARY, to->q_flags)) 504 { 505 bool firstone = TRUE; 506 507 strcat(optbuf, " NOTIFY="); 508 if (bitset(QPINGONSUCCESS, to->q_flags)) 509 { 510 strcat(optbuf, "SUCCESS"); 511 firstone = FALSE; 512 } 513 if (bitset(QPINGONFAILURE, to->q_flags)) 514 { 515 if (!firstone) 516 strcat(optbuf, ","); 517 strcat(optbuf, "FAILURE"); 518 firstone = FALSE; 519 } 520 if (bitset(QPINGONDELAY, to->q_flags)) 521 { 522 if (!firstone) 523 strcat(optbuf, ","); 524 strcat(optbuf, "DELAY"); 525 firstone = FALSE; 526 } 527 if (firstone) 528 strcat(optbuf, "NEVER"); 529 } 530 531 /* ORCPT= parameter */ 532 if (to->q_orcpt != NULL) 533 { 534 strcat(optbuf, " ORCPT="); 535 strcat(optbuf, to->q_orcpt); 536 } 537 } 538 539 smtpmessage("RCPT To:<%s>%s", m, mci, to->q_user, optbuf); 540 541 SmtpPhase = mci->mci_phase = "client RCPT"; 542 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 543 r = reply(m, mci, e, TimeOuts.to_rcpt, NULL); 544 to->q_rstatus = newstr(SmtpReplyBuffer); 545 to->q_status = smtptodsn(r); 546 if (r < 0 || REPLYTYPE(r) == 4) 547 return EX_TEMPFAIL; 548 else if (REPLYTYPE(r) == 2) 549 return EX_OK; 550 else if (r == 550 || r == 551 || r == 553) 551 return EX_NOUSER; 552 else if (r == 552 || r == 554) 553 return EX_UNAVAILABLE; 554 555 #ifdef LOG 556 if (LogLevel > 1) 557 { 558 syslog(LOG_CRIT, "%s: %s: SMTP RCPT protocol error: %s", 559 e->e_id, mci->mci_host, SmtpReplyBuffer); 560 } 561 #endif 562 563 return (EX_PROTOCOL); 564 } 565 /* 566 ** SMTPDATA -- send the data and clean up the transaction. 567 ** 568 ** Parameters: 569 ** m -- mailer being sent to. 570 ** e -- the envelope for this message. 571 ** 572 ** Returns: 573 ** exit status corresponding to DATA command. 574 ** 575 ** Side Effects: 576 ** none. 577 */ 578 579 static jmp_buf CtxDataTimeout; 580 static void datatimeout(); 581 582 smtpdata(m, mci, e) 583 struct mailer *m; 584 register MCI *mci; 585 register ENVELOPE *e; 586 { 587 register int r; 588 register EVENT *ev; 589 time_t timeout; 590 591 /* 592 ** Send the data. 593 ** First send the command and check that it is ok. 594 ** Then send the data. 595 ** Follow it up with a dot to terminate. 596 ** Finally get the results of the transaction. 597 */ 598 599 /* send the command and check ok to proceed */ 600 smtpmessage("DATA", m, mci); 601 SmtpPhase = mci->mci_phase = "client DATA 354"; 602 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 603 r = reply(m, mci, e, TimeOuts.to_datainit, NULL); 604 if (r < 0 || REPLYTYPE(r) == 4) 605 { 606 smtpquit(m, mci, e); 607 return (EX_TEMPFAIL); 608 } 609 else if (r == 554) 610 { 611 smtprset(m, mci, e); 612 return (EX_UNAVAILABLE); 613 } 614 else if (r != 354) 615 { 616 #ifdef LOG 617 if (LogLevel > 1) 618 { 619 syslog(LOG_CRIT, "%s: %s: SMTP DATA-1 protocol error: %s", 620 e->e_id, mci->mci_host, SmtpReplyBuffer); 621 } 622 #endif 623 smtprset(m, mci, e); 624 return (EX_PROTOCOL); 625 } 626 627 /* 628 ** Set timeout around data writes. Make it at least large 629 ** enough for DNS timeouts on all recipients plus some fudge 630 ** factor. The main thing is that it should not be infinite. 631 */ 632 633 if (setjmp(CtxDataTimeout) != 0) 634 { 635 mci->mci_errno = errno; 636 mci->mci_exitstat = EX_TEMPFAIL; 637 mci->mci_state = MCIS_ERROR; 638 syserr("451 timeout writing message to %s", mci->mci_host); 639 smtpquit(m, mci, e); 640 return EX_TEMPFAIL; 641 } 642 643 timeout = e->e_msgsize / 16; 644 if (timeout < (time_t) 600) 645 timeout = (time_t) 600; 646 timeout += e->e_nrcpts * 300; 647 ev = setevent(timeout, datatimeout, 0); 648 649 /* 650 ** Output the actual message. 651 */ 652 653 (*e->e_puthdr)(mci, e->e_header, e); 654 (*e->e_putbody)(mci, e, NULL); 655 656 /* 657 ** Cleanup after sending message. 658 */ 659 660 clrevent(ev); 661 662 if (ferror(mci->mci_out)) 663 { 664 /* error during processing -- don't send the dot */ 665 mci->mci_errno = EIO; 666 mci->mci_exitstat = EX_IOERR; 667 mci->mci_state = MCIS_ERROR; 668 smtpquit(m, mci, e); 669 return EX_IOERR; 670 } 671 672 /* terminate the message */ 673 fprintf(mci->mci_out, ".%s", m->m_eol); 674 if (TrafficLogFile != NULL) 675 fprintf(TrafficLogFile, "%05d >>> .\n", getpid()); 676 if (Verbose) 677 nmessage(">>> ."); 678 679 /* check for the results of the transaction */ 680 SmtpPhase = mci->mci_phase = "client DATA 250"; 681 setproctitle("%s %s: %s", e->e_id, CurHostName, mci->mci_phase); 682 r = reply(m, mci, e, TimeOuts.to_datafinal, NULL); 683 if (r < 0) 684 { 685 smtpquit(m, mci, e); 686 return (EX_TEMPFAIL); 687 } 688 mci->mci_state = MCIS_OPEN; 689 e->e_statmsg = newstr(&SmtpReplyBuffer[4]); 690 if (REPLYTYPE(r) == 4) 691 return (EX_TEMPFAIL); 692 else if (r == 250) 693 return (EX_OK); 694 else if (r == 552 || r == 554) 695 return (EX_UNAVAILABLE); 696 #ifdef LOG 697 if (LogLevel > 1) 698 { 699 syslog(LOG_CRIT, "%s: %s: SMTP DATA-2 protocol error: %s", 700 e->e_id, mci->mci_host, SmtpReplyBuffer); 701 } 702 #endif 703 return (EX_PROTOCOL); 704 } 705 706 707 static void 708 datatimeout() 709 { 710 longjmp(CtxDataTimeout, 1); 711 } 712 /* 713 ** SMTPQUIT -- close the SMTP connection. 714 ** 715 ** Parameters: 716 ** m -- a pointer to the mailer. 717 ** 718 ** Returns: 719 ** none. 720 ** 721 ** Side Effects: 722 ** sends the final protocol and closes the connection. 723 */ 724 725 smtpquit(m, mci, e) 726 register MAILER *m; 727 register MCI *mci; 728 ENVELOPE *e; 729 { 730 bool oldSuprErrs = SuprErrs; 731 732 /* 733 ** Suppress errors here -- we may be processing a different 734 ** job when we do the quit connection, and we don't want the 735 ** new job to be penalized for something that isn't it's 736 ** problem. 737 */ 738 739 SuprErrs = TRUE; 740 741 /* send the quit message if we haven't gotten I/O error */ 742 if (mci->mci_state != MCIS_ERROR) 743 { 744 SmtpPhase = "client QUIT"; 745 smtpmessage("QUIT", m, mci); 746 (void) reply(m, mci, e, TimeOuts.to_quit, NULL); 747 SuprErrs = oldSuprErrs; 748 if (mci->mci_state == MCIS_CLOSED) 749 { 750 SuprErrs = oldSuprErrs; 751 return; 752 } 753 } 754 755 /* now actually close the connection and pick up the zombie */ 756 (void) endmailer(mci, e, NULL); 757 758 SuprErrs = oldSuprErrs; 759 } 760 /* 761 ** SMTPRSET -- send a RSET (reset) command 762 */ 763 764 smtprset(m, mci, e) 765 register MAILER *m; 766 register MCI *mci; 767 ENVELOPE *e; 768 { 769 int r; 770 771 SmtpPhase = "client RSET"; 772 smtpmessage("RSET", m, mci); 773 r = reply(m, mci, e, TimeOuts.to_rset, NULL); 774 if (r < 0) 775 mci->mci_state = MCIS_ERROR; 776 else if (REPLYTYPE(r) == 2) 777 { 778 mci->mci_state = MCIS_OPEN; 779 return; 780 } 781 smtpquit(m, mci, e); 782 } 783 /* 784 ** SMTPPROBE -- check the connection state 785 */ 786 787 smtpprobe(mci) 788 register MCI *mci; 789 { 790 int r; 791 MAILER *m = mci->mci_mailer; 792 extern ENVELOPE BlankEnvelope; 793 ENVELOPE *e = &BlankEnvelope; 794 795 SmtpPhase = "client probe"; 796 smtpmessage("RSET", m, mci); 797 r = reply(m, mci, e, TimeOuts.to_miscshort, NULL); 798 if (r < 0 || REPLYTYPE(r) != 2) 799 smtpquit(m, mci, e); 800 return r; 801 } 802 /* 803 ** REPLY -- read arpanet reply 804 ** 805 ** Parameters: 806 ** m -- the mailer we are reading the reply from. 807 ** mci -- the mailer connection info structure. 808 ** e -- the current envelope. 809 ** timeout -- the timeout for reads. 810 ** pfunc -- processing function called on each line of response. 811 ** If null, no special processing is done. 812 ** 813 ** Returns: 814 ** reply code it reads. 815 ** 816 ** Side Effects: 817 ** flushes the mail file. 818 */ 819 820 reply(m, mci, e, timeout, pfunc) 821 MAILER *m; 822 MCI *mci; 823 ENVELOPE *e; 824 time_t timeout; 825 void (*pfunc)(); 826 { 827 register char *bufp; 828 register int r; 829 bool firstline = TRUE; 830 char junkbuf[MAXLINE]; 831 832 if (mci->mci_out != NULL) 833 (void) fflush(mci->mci_out); 834 835 if (tTd(18, 1)) 836 printf("reply\n"); 837 838 /* 839 ** Read the input line, being careful not to hang. 840 */ 841 842 for (bufp = SmtpReplyBuffer;; bufp = junkbuf) 843 { 844 register char *p; 845 extern time_t curtime(); 846 847 /* actually do the read */ 848 if (e->e_xfp != NULL) 849 (void) fflush(e->e_xfp); /* for debugging */ 850 851 /* if we are in the process of closing just give the code */ 852 if (mci->mci_state == MCIS_CLOSED) 853 return (SMTPCLOSING); 854 855 if (mci->mci_out != NULL) 856 fflush(mci->mci_out); 857 858 /* get the line from the other side */ 859 p = sfgets(bufp, MAXLINE, mci->mci_in, timeout, SmtpPhase); 860 mci->mci_lastuse = curtime(); 861 862 if (p == NULL) 863 { 864 bool oldholderrs; 865 extern char MsgBuf[]; /* err.c */ 866 867 /* if the remote end closed early, fake an error */ 868 if (errno == 0) 869 # ifdef ECONNRESET 870 errno = ECONNRESET; 871 # else /* ECONNRESET */ 872 errno = EPIPE; 873 # endif /* ECONNRESET */ 874 875 mci->mci_errno = errno; 876 mci->mci_exitstat = EX_TEMPFAIL; 877 oldholderrs = HoldErrs; 878 HoldErrs = TRUE; 879 usrerr("451 reply: read error from %s", mci->mci_host); 880 881 /* if debugging, pause so we can see state */ 882 if (tTd(18, 100)) 883 pause(); 884 mci->mci_state = MCIS_ERROR; 885 smtpquit(m, mci, e); 886 #ifdef XDEBUG 887 { 888 char wbuf[MAXLINE]; 889 char *p = wbuf; 890 if (e->e_to != NULL) 891 { 892 sprintf(p, "%s... ", e->e_to); 893 p += strlen(p); 894 } 895 sprintf(p, "reply(%s) during %s", 896 mci->mci_host, SmtpPhase); 897 checkfd012(wbuf); 898 } 899 #endif 900 HoldErrs = oldholderrs; 901 return (-1); 902 } 903 fixcrlf(bufp, TRUE); 904 905 /* EHLO failure is not a real error */ 906 if (e->e_xfp != NULL && (bufp[0] == '4' || 907 (bufp[0] == '5' && strncmp(SmtpMsgBuffer, "EHLO", 4) != 0))) 908 { 909 /* serious error -- log the previous command */ 910 if (SmtpNeedIntro) 911 { 912 /* inform user who we are chatting with */ 913 fprintf(CurEnv->e_xfp, 914 "... while talking to %s:\n", 915 CurHostName); 916 SmtpNeedIntro = FALSE; 917 } 918 if (SmtpMsgBuffer[0] != '\0') 919 fprintf(e->e_xfp, ">>> %s\n", SmtpMsgBuffer); 920 SmtpMsgBuffer[0] = '\0'; 921 922 /* now log the message as from the other side */ 923 fprintf(e->e_xfp, "<<< %s\n", bufp); 924 } 925 926 /* display the input for verbose mode */ 927 if (Verbose) 928 nmessage("050 %s", bufp); 929 930 /* process the line */ 931 if (pfunc != NULL) 932 (*pfunc)(bufp, firstline, m, mci, e); 933 934 firstline = FALSE; 935 936 /* if continuation is required, we can go on */ 937 if (bufp[3] == '-') 938 continue; 939 940 /* ignore improperly formated input */ 941 if (!(isascii(bufp[0]) && isdigit(bufp[0]))) 942 continue; 943 944 /* decode the reply code */ 945 r = atoi(bufp); 946 947 /* extra semantics: 0xx codes are "informational" */ 948 if (r >= 100) 949 break; 950 } 951 952 /* 953 ** Now look at SmtpReplyBuffer -- only care about the first 954 ** line of the response from here on out. 955 */ 956 957 /* save temporary failure messages for posterity */ 958 if (SmtpReplyBuffer[0] == '4' && SmtpError[0] == '\0') 959 (void) strcpy(SmtpError, SmtpReplyBuffer); 960 961 /* reply code 421 is "Service Shutting Down" */ 962 if (r == SMTPCLOSING && mci->mci_state != MCIS_SSD) 963 { 964 /* send the quit protocol */ 965 mci->mci_state = MCIS_SSD; 966 smtpquit(m, mci, e); 967 } 968 969 return (r); 970 } 971 /* 972 ** SMTPMESSAGE -- send message to server 973 ** 974 ** Parameters: 975 ** f -- format 976 ** m -- the mailer to control formatting. 977 ** a, b, c -- parameters 978 ** 979 ** Returns: 980 ** none. 981 ** 982 ** Side Effects: 983 ** writes message to mci->mci_out. 984 */ 985 986 /*VARARGS1*/ 987 #ifdef __STDC__ 988 smtpmessage(char *f, MAILER *m, MCI *mci, ...) 989 #else 990 smtpmessage(f, m, mci, va_alist) 991 char *f; 992 MAILER *m; 993 MCI *mci; 994 va_dcl 995 #endif 996 { 997 VA_LOCAL_DECL 998 999 VA_START(mci); 1000 (void) vsprintf(SmtpMsgBuffer, f, ap); 1001 VA_END; 1002 1003 if (tTd(18, 1) || Verbose) 1004 nmessage(">>> %s", SmtpMsgBuffer); 1005 if (TrafficLogFile != NULL) 1006 fprintf(TrafficLogFile, "%05d >>> %s\n", getpid(), SmtpMsgBuffer); 1007 if (mci->mci_out != NULL) 1008 { 1009 fprintf(mci->mci_out, "%s%s", SmtpMsgBuffer, 1010 m == NULL ? "\r\n" : m->m_eol); 1011 } 1012 else if (tTd(18, 1)) 1013 { 1014 printf("smtpmessage: NULL mci_out\n"); 1015 } 1016 } 1017 1018 # endif /* SMTP */ 1019