1 /* 2 * Copyright (c) 1999-2002 Sendmail, Inc. and its suppliers. 3 * All rights reserved. 4 * 5 * By using this file, you agree to the terms and conditions set 6 * forth in the LICENSE file which can be found at the top level of 7 * the sendmail distribution. 8 * 9 */ 10 11 #include <sendmail.h> 12 13 SM_RCSID("@(#)$Id: milter.c,v 8.194 2002/03/05 00:23:47 gshapiro Exp $") 14 15 #if MILTER 16 # include <libmilter/mfapi.h> 17 # include <libmilter/mfdef.h> 18 19 # include <errno.h> 20 # include <sys/time.h> 21 22 # if NETINET || NETINET6 23 # include <arpa/inet.h> 24 # endif /* NETINET || NETINET6 */ 25 26 # include <sm/fdset.h> 27 28 static void milter_connect_timeout __P((void)); 29 static void milter_error __P((struct milter *, ENVELOPE *)); 30 static int milter_open __P((struct milter *, bool, ENVELOPE *)); 31 static void milter_parse_timeouts __P((char *, struct milter *)); 32 33 static char *MilterConnectMacros[MAXFILTERMACROS + 1]; 34 static char *MilterHeloMacros[MAXFILTERMACROS + 1]; 35 static char *MilterEnvFromMacros[MAXFILTERMACROS + 1]; 36 static char *MilterEnvRcptMacros[MAXFILTERMACROS + 1]; 37 38 # define MILTER_CHECK_DONE_MSG() \ 39 if (*state == SMFIR_REPLYCODE || \ 40 *state == SMFIR_REJECT || \ 41 *state == SMFIR_DISCARD || \ 42 *state == SMFIR_TEMPFAIL) \ 43 { \ 44 /* Abort the filters to let them know we are done with msg */ \ 45 milter_abort(e); \ 46 } 47 48 # define MILTER_CHECK_ERROR(action) \ 49 if (bitnset(SMF_TEMPFAIL, m->mf_flags)) \ 50 *state = SMFIR_TEMPFAIL; \ 51 else if (bitnset(SMF_REJECT, m->mf_flags)) \ 52 *state = SMFIR_REJECT; \ 53 else \ 54 action; 55 56 # define MILTER_CHECK_REPLYCODE(default) \ 57 if (response == NULL || \ 58 strlen(response) + 1 != (size_t) rlen || \ 59 rlen < 3 || \ 60 (response[0] != '4' && response[0] != '5') || \ 61 !isascii(response[1]) || !isdigit(response[1]) || \ 62 !isascii(response[2]) || !isdigit(response[2])) \ 63 { \ 64 if (response != NULL) \ 65 sm_free(response); /* XXX */ \ 66 response = newstr(default); \ 67 } \ 68 else \ 69 { \ 70 char *ptr = response; \ 71 \ 72 /* Check for unprotected %'s in the string */ \ 73 while (*ptr != '\0') \ 74 { \ 75 if (*ptr == '%' && *++ptr != '%') \ 76 { \ 77 sm_free(response); /* XXX */ \ 78 response = newstr(default); \ 79 break; \ 80 } \ 81 ptr++; \ 82 } \ 83 } 84 85 # define MILTER_DF_ERROR(msg) \ 86 { \ 87 int save_errno = errno; \ 88 \ 89 if (tTd(64, 5)) \ 90 { \ 91 sm_dprintf(msg, dfname, sm_errstring(save_errno)); \ 92 sm_dprintf("\n"); \ 93 } \ 94 if (MilterLogLevel > 0) \ 95 sm_syslog(LOG_ERR, e->e_id, msg, dfname, sm_errstring(save_errno)); \ 96 if (SuperSafe == SAFE_REALLY) \ 97 { \ 98 if (e->e_dfp != NULL) \ 99 { \ 100 (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT); \ 101 e->e_dfp = NULL; \ 102 } \ 103 e->e_flags &= ~EF_HAS_DF; \ 104 } \ 105 errno = save_errno; \ 106 } 107 108 /* 109 ** MILTER_TIMEOUT -- make sure socket is ready in time 110 ** 111 ** Parameters: 112 ** routine -- routine name for debug/logging 113 ** secs -- number of seconds in timeout 114 ** write -- waiting to read or write? 115 ** started -- whether this is part of a previous sequence 116 ** 117 ** Assumes 'm' is a milter structure for the current socket. 118 */ 119 120 # define MILTER_TIMEOUT(routine, secs, write, started) \ 121 { \ 122 int ret; \ 123 int save_errno; \ 124 fd_set fds; \ 125 struct timeval tv; \ 126 \ 127 if (SM_FD_SETSIZE > 0 && m->mf_sock >= SM_FD_SETSIZE) \ 128 { \ 129 if (tTd(64, 5)) \ 130 sm_dprintf("milter_%s(%s): socket %d is larger than FD_SETSIZE %d\n", \ 131 (routine), m->mf_name, m->mf_sock, \ 132 SM_FD_SETSIZE); \ 133 if (MilterLogLevel > 0) \ 134 sm_syslog(LOG_ERR, e->e_id, \ 135 "Milter (%s): socket(%s) %d is larger than FD_SETSIZE %d", \ 136 m->mf_name, (routine), m->mf_sock, \ 137 SM_FD_SETSIZE); \ 138 milter_error(m, e); \ 139 return NULL; \ 140 } \ 141 \ 142 do \ 143 { \ 144 FD_ZERO(&fds); \ 145 SM_FD_SET(m->mf_sock, &fds); \ 146 tv.tv_sec = (secs); \ 147 tv.tv_usec = 0; \ 148 ret = select(m->mf_sock + 1, \ 149 (write) ? NULL : &fds, \ 150 (write) ? &fds : NULL, \ 151 NULL, &tv); \ 152 } while (ret < 0 && errno == EINTR); \ 153 \ 154 switch (ret) \ 155 { \ 156 case 0: \ 157 if (tTd(64, 5)) \ 158 sm_dprintf("milter_%s(%s): timeout\n", (routine), \ 159 m->mf_name); \ 160 if (MilterLogLevel > 0) \ 161 sm_syslog(LOG_ERR, e->e_id, \ 162 "Milter (%s): %s %s %s %s", \ 163 m->mf_name, "timeout", \ 164 started ? "during" : "before", \ 165 "data", (routine)); \ 166 milter_error(m, e); \ 167 return NULL; \ 168 \ 169 case -1: \ 170 save_errno = errno; \ 171 if (tTd(64, 5)) \ 172 sm_dprintf("milter_%s(%s): select: %s\n", (routine), \ 173 m->mf_name, sm_errstring(save_errno)); \ 174 if (MilterLogLevel > 0) \ 175 { \ 176 sm_syslog(LOG_ERR, e->e_id, \ 177 "Milter (%s): select(%s): %s", \ 178 m->mf_name, (routine), \ 179 sm_errstring(save_errno)); \ 180 } \ 181 milter_error(m, e); \ 182 return NULL; \ 183 \ 184 default: \ 185 if (SM_FD_ISSET(m->mf_sock, &fds)) \ 186 break; \ 187 if (tTd(64, 5)) \ 188 sm_dprintf("milter_%s(%s): socket not ready\n", \ 189 (routine), m->mf_name); \ 190 if (MilterLogLevel > 0) \ 191 { \ 192 sm_syslog(LOG_ERR, e->e_id, \ 193 "Milter (%s): socket(%s) not ready", \ 194 m->mf_name, (routine)); \ 195 } \ 196 milter_error(m, e); \ 197 return NULL; \ 198 } \ 199 } 200 201 /* 202 ** Low level functions 203 */ 204 205 /* 206 ** MILTER_READ -- read from a remote milter filter 207 ** 208 ** Parameters: 209 ** m -- milter to read from. 210 ** cmd -- return param for command read. 211 ** rlen -- return length of response string. 212 ** to -- timeout in seconds. 213 ** e -- current envelope. 214 ** 215 ** Returns: 216 ** response string (may be NULL) 217 */ 218 219 static char * 220 milter_sysread(m, buf, sz, to, e) 221 struct milter *m; 222 char *buf; 223 ssize_t sz; 224 time_t to; 225 ENVELOPE *e; 226 { 227 time_t readstart = 0; 228 ssize_t len, curl; 229 bool started = false; 230 231 curl = 0; 232 233 if (to > 0) 234 readstart = curtime(); 235 236 for (;;) 237 { 238 if (to > 0) 239 { 240 time_t now; 241 242 now = curtime(); 243 if (now - readstart >= to) 244 { 245 if (tTd(64, 5)) 246 sm_dprintf("milter_read (%s): %s %s %s", 247 m->mf_name, "timeout", 248 started ? "during" : "before", 249 "data read"); 250 if (MilterLogLevel > 0) 251 sm_syslog(LOG_ERR, e->e_id, 252 "Milter (%s): %s %s %s", 253 m->mf_name, "timeout", 254 started ? "during" : "before", 255 "data read"); 256 milter_error(m, e); 257 return NULL; 258 } 259 to -= now - readstart; 260 readstart = now; 261 MILTER_TIMEOUT("read", to, false, started); 262 } 263 264 len = read(m->mf_sock, buf + curl, sz - curl); 265 266 if (len < 0) 267 { 268 int save_errno = errno; 269 270 if (tTd(64, 5)) 271 sm_dprintf("milter_read(%s): read returned %ld: %s\n", 272 m->mf_name, (long) len, 273 sm_errstring(save_errno)); 274 if (MilterLogLevel > 0) 275 sm_syslog(LOG_ERR, e->e_id, 276 "Milter (%s): read returned %ld: %s", 277 m->mf_name, (long) len, 278 sm_errstring(save_errno)); 279 milter_error(m, e); 280 return NULL; 281 } 282 283 started = true; 284 curl += len; 285 if (len == 0 || curl >= sz) 286 break; 287 288 } 289 290 if (curl != sz) 291 { 292 if (tTd(64, 5)) 293 sm_dprintf("milter_read(%s): cmd read returned %ld, expecting %ld\n", 294 m->mf_name, (long) curl, (long) sz); 295 if (MilterLogLevel > 0) 296 sm_syslog(LOG_ERR, e->e_id, 297 "milter_read(%s): cmd read returned %ld, expecting %ld", 298 m->mf_name, (long) curl, (long) sz); 299 milter_error(m, e); 300 return NULL; 301 } 302 return buf; 303 } 304 305 static char * 306 milter_read(m, cmd, rlen, to, e) 307 struct milter *m; 308 char *cmd; 309 ssize_t *rlen; 310 time_t to; 311 ENVELOPE *e; 312 { 313 time_t readstart = 0; 314 ssize_t expl; 315 mi_int32 i; 316 char *buf; 317 char data[MILTER_LEN_BYTES + 1]; 318 319 *rlen = 0; 320 *cmd = '\0'; 321 322 if (to > 0) 323 readstart = curtime(); 324 325 if (milter_sysread(m, data, sizeof data, to, e) == NULL) 326 return NULL; 327 328 /* reset timeout */ 329 if (to > 0) 330 { 331 time_t now; 332 333 now = curtime(); 334 if (now - readstart >= to) 335 { 336 if (tTd(64, 5)) 337 sm_dprintf("milter_read(%s): timeout before data read\n", 338 m->mf_name); 339 if (MilterLogLevel > 0) 340 sm_syslog(LOG_ERR, e->e_id, 341 "Milter read(%s): timeout before data read", 342 m->mf_name); 343 milter_error(m, e); 344 return NULL; 345 } 346 to -= now - readstart; 347 } 348 349 *cmd = data[MILTER_LEN_BYTES]; 350 data[MILTER_LEN_BYTES] = '\0'; 351 (void) memcpy(&i, data, MILTER_LEN_BYTES); 352 expl = ntohl(i) - 1; 353 354 if (tTd(64, 25)) 355 sm_dprintf("milter_read(%s): expecting %ld bytes\n", 356 m->mf_name, (long) expl); 357 358 if (expl < 0) 359 { 360 if (tTd(64, 5)) 361 sm_dprintf("milter_read(%s): read size %ld out of range\n", 362 m->mf_name, (long) expl); 363 if (MilterLogLevel > 0) 364 sm_syslog(LOG_ERR, e->e_id, 365 "milter_read(%s): read size %ld out of range", 366 m->mf_name, (long) expl); 367 milter_error(m, e); 368 return NULL; 369 } 370 371 if (expl == 0) 372 return NULL; 373 374 buf = (char *) xalloc(expl); 375 376 if (milter_sysread(m, buf, expl, to, e) == NULL) 377 { 378 sm_free(buf); /* XXX */ 379 return NULL; 380 } 381 382 if (tTd(64, 50)) 383 sm_dprintf("milter_read(%s): Returning %*s\n", 384 m->mf_name, (int) expl, buf); 385 *rlen = expl; 386 return buf; 387 } 388 /* 389 ** MILTER_WRITE -- write to a remote milter filter 390 ** 391 ** Parameters: 392 ** m -- milter to read from. 393 ** cmd -- command to send. 394 ** buf -- optional command data. 395 ** len -- length of buf. 396 ** to -- timeout in seconds. 397 ** e -- current envelope. 398 ** 399 ** Returns: 400 ** buf if successful, NULL otherwise 401 ** Not actually used anywhere but function prototype 402 ** must match milter_read() 403 */ 404 405 static char * 406 milter_write(m, cmd, buf, len, to, e) 407 struct milter *m; 408 char cmd; 409 char *buf; 410 ssize_t len; 411 time_t to; 412 ENVELOPE *e; 413 { 414 time_t writestart = (time_t) 0; 415 ssize_t sl, i; 416 mi_int32 nl; 417 char data[MILTER_LEN_BYTES + 1]; 418 bool started = false; 419 420 if (len < 0 || len > MILTER_CHUNK_SIZE) 421 { 422 if (tTd(64, 5)) 423 sm_dprintf("milter_write(%s): length %ld out of range\n", 424 m->mf_name, (long) len); 425 if (MilterLogLevel > 0) 426 sm_syslog(LOG_ERR, e->e_id, 427 "milter_write(%s): length %ld out of range", 428 m->mf_name, (long) len); 429 milter_error(m, e); 430 return NULL; 431 } 432 433 if (tTd(64, 20)) 434 sm_dprintf("milter_write(%s): cmd %c, len %ld\n", 435 m->mf_name, cmd, (long) len); 436 437 nl = htonl(len + 1); /* add 1 for the cmd char */ 438 (void) memcpy(data, (char *) &nl, MILTER_LEN_BYTES); 439 data[MILTER_LEN_BYTES] = cmd; 440 sl = MILTER_LEN_BYTES + 1; 441 442 if (to > 0) 443 { 444 writestart = curtime(); 445 MILTER_TIMEOUT("write", to, true, started); 446 } 447 448 /* use writev() instead to send the whole stuff at once? */ 449 i = write(m->mf_sock, (void *) data, sl); 450 if (i != sl) 451 { 452 int save_errno = errno; 453 454 if (tTd(64, 5)) 455 sm_dprintf("milter_write (%s): write(%c) returned %ld, expected %ld: %s\n", 456 m->mf_name, cmd, (long) i, (long) sl, 457 sm_errstring(save_errno)); 458 if (MilterLogLevel > 0) 459 sm_syslog(LOG_ERR, e->e_id, 460 "Milter (%s): write(%c) returned %ld, expected %ld: %s", 461 m->mf_name, cmd, (long) i, (long) sl, 462 sm_errstring(save_errno)); 463 milter_error(m, e); 464 return buf; 465 } 466 467 if (len <= 0 || buf == NULL) 468 return buf; 469 470 if (tTd(64, 50)) 471 sm_dprintf("milter_write(%s): Sending %*s\n", 472 m->mf_name, (int) len, buf); 473 started = true; 474 475 if (to > 0) 476 { 477 time_t now; 478 479 now = curtime(); 480 if (now - writestart >= to) 481 { 482 if (tTd(64, 5)) 483 sm_dprintf("milter_write(%s): timeout before data write\n", 484 m->mf_name); 485 if (MilterLogLevel > 0) 486 sm_syslog(LOG_ERR, e->e_id, 487 "Milter (%s): timeout before data write", 488 m->mf_name); 489 milter_error(m, e); 490 return NULL; 491 } 492 else 493 { 494 to -= now - writestart; 495 MILTER_TIMEOUT("write", to, true, started); 496 } 497 } 498 499 i = write(m->mf_sock, (void *) buf, len); 500 if (i != len) 501 { 502 int save_errno = errno; 503 504 if (tTd(64, 5)) 505 sm_dprintf("milter_write(%s): write(%c) returned %ld, expected %ld: %s\n", 506 m->mf_name, cmd, (long) i, (long) sl, 507 sm_errstring(save_errno)); 508 if (MilterLogLevel > 0) 509 sm_syslog(LOG_ERR, e->e_id, 510 "Milter (%s): write(%c) returned %ld, expected %ld: %s", 511 m->mf_name, cmd, (long) i, (long) len, 512 sm_errstring(save_errno)); 513 milter_error(m, e); 514 return NULL; 515 } 516 return buf; 517 } 518 519 /* 520 ** Utility functions 521 */ 522 523 /* 524 ** MILTER_OPEN -- connect to remote milter filter 525 ** 526 ** Parameters: 527 ** m -- milter to connect to. 528 ** parseonly -- parse but don't connect. 529 ** e -- current envelope. 530 ** 531 ** Returns: 532 ** connected socket if sucessful && !parseonly, 533 ** 0 upon parse success if parseonly, 534 ** -1 otherwise. 535 */ 536 537 static jmp_buf MilterConnectTimeout; 538 539 static int 540 milter_open(m, parseonly, e) 541 struct milter *m; 542 bool parseonly; 543 ENVELOPE *e; 544 { 545 int sock = 0; 546 SOCKADDR_LEN_T addrlen = 0; 547 int addrno = 0; 548 int save_errno; 549 char *p; 550 char *colon; 551 char *at; 552 struct hostent *hp = NULL; 553 SOCKADDR addr; 554 555 if (m->mf_conn == NULL || m->mf_conn[0] == '\0') 556 { 557 if (tTd(64, 5)) 558 sm_dprintf("X%s: empty or missing socket information\n", 559 m->mf_name); 560 if (parseonly) 561 syserr("X%s: empty or missing socket information", 562 m->mf_name); 563 else if (MilterLogLevel > 10) 564 sm_syslog(LOG_ERR, e->e_id, 565 "Milter (%s): empty or missing socket information", 566 m->mf_name); 567 milter_error(m, e); 568 return -1; 569 } 570 571 /* protocol:filename or protocol:port@host */ 572 memset(&addr, '\0', sizeof addr); 573 p = m->mf_conn; 574 colon = strchr(p, ':'); 575 if (colon != NULL) 576 { 577 *colon = '\0'; 578 579 if (*p == '\0') 580 { 581 # if NETUNIX 582 /* default to AF_UNIX */ 583 addr.sa.sa_family = AF_UNIX; 584 # else /* NETUNIX */ 585 # if NETINET 586 /* default to AF_INET */ 587 addr.sa.sa_family = AF_INET; 588 # else /* NETINET */ 589 # if NETINET6 590 /* default to AF_INET6 */ 591 addr.sa.sa_family = AF_INET6; 592 # else /* NETINET6 */ 593 /* no protocols available */ 594 sm_syslog(LOG_ERR, e->e_id, 595 "Milter (%s): no valid socket protocols available", 596 m->mf_name); 597 milter_error(m, e); 598 return -1; 599 # endif /* NETINET6 */ 600 # endif /* NETINET */ 601 # endif /* NETUNIX */ 602 } 603 # if NETUNIX 604 else if (sm_strcasecmp(p, "unix") == 0 || 605 sm_strcasecmp(p, "local") == 0) 606 addr.sa.sa_family = AF_UNIX; 607 # endif /* NETUNIX */ 608 # if NETINET 609 else if (sm_strcasecmp(p, "inet") == 0) 610 addr.sa.sa_family = AF_INET; 611 # endif /* NETINET */ 612 # if NETINET6 613 else if (sm_strcasecmp(p, "inet6") == 0) 614 addr.sa.sa_family = AF_INET6; 615 # endif /* NETINET6 */ 616 else 617 { 618 # ifdef EPROTONOSUPPORT 619 errno = EPROTONOSUPPORT; 620 # else /* EPROTONOSUPPORT */ 621 errno = EINVAL; 622 # endif /* EPROTONOSUPPORT */ 623 if (tTd(64, 5)) 624 sm_dprintf("X%s: unknown socket type %s\n", 625 m->mf_name, p); 626 if (parseonly) 627 syserr("X%s: unknown socket type %s", 628 m->mf_name, p); 629 else if (MilterLogLevel > 10) 630 sm_syslog(LOG_ERR, e->e_id, 631 "Milter (%s): unknown socket type %s", 632 m->mf_name, p); 633 milter_error(m, e); 634 return -1; 635 } 636 *colon++ = ':'; 637 } 638 else 639 { 640 /* default to AF_UNIX */ 641 addr.sa.sa_family = AF_UNIX; 642 colon = p; 643 } 644 645 # if NETUNIX 646 if (addr.sa.sa_family == AF_UNIX) 647 { 648 long sff = SFF_SAFEDIRPATH|SFF_OPENASROOT|SFF_NOLINK|SFF_EXECOK; 649 650 at = colon; 651 if (strlen(colon) >= sizeof addr.sunix.sun_path) 652 { 653 if (tTd(64, 5)) 654 sm_dprintf("X%s: local socket name %s too long\n", 655 m->mf_name, colon); 656 errno = EINVAL; 657 if (parseonly) 658 syserr("X%s: local socket name %s too long", 659 m->mf_name, colon); 660 else if (MilterLogLevel > 10) 661 sm_syslog(LOG_ERR, e->e_id, 662 "Milter (%s): local socket name %s too long", 663 m->mf_name, colon); 664 milter_error(m, e); 665 return -1; 666 } 667 errno = safefile(colon, RunAsUid, RunAsGid, RunAsUserName, sff, 668 S_IRUSR|S_IWUSR, NULL); 669 670 /* if just parsing .cf file, socket doesn't need to exist */ 671 if (parseonly && errno == ENOENT) 672 { 673 if (OpMode == MD_DAEMON || 674 OpMode == MD_FGDAEMON) 675 (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT, 676 "WARNING: X%s: local socket name %s missing\n", 677 m->mf_name, colon); 678 } 679 else if (errno != 0) 680 { 681 /* if not safe, don't create */ 682 save_errno = errno; 683 if (tTd(64, 5)) 684 sm_dprintf("X%s: local socket name %s unsafe\n", 685 m->mf_name, colon); 686 errno = save_errno; 687 if (parseonly) 688 { 689 if (OpMode == MD_DAEMON || 690 OpMode == MD_FGDAEMON || 691 OpMode == MD_SMTP) 692 syserr("X%s: local socket name %s unsafe", 693 m->mf_name, colon); 694 } 695 else if (MilterLogLevel > 10) 696 sm_syslog(LOG_ERR, e->e_id, 697 "Milter (%s): local socket name %s unsafe", 698 m->mf_name, colon); 699 milter_error(m, e); 700 return -1; 701 } 702 703 (void) sm_strlcpy(addr.sunix.sun_path, colon, 704 sizeof addr.sunix.sun_path); 705 addrlen = sizeof (struct sockaddr_un); 706 } 707 else 708 # endif /* NETUNIX */ 709 # if NETINET || NETINET6 710 if (false 711 # if NETINET 712 || addr.sa.sa_family == AF_INET 713 # endif /* NETINET */ 714 # if NETINET6 715 || addr.sa.sa_family == AF_INET6 716 # endif /* NETINET6 */ 717 ) 718 { 719 unsigned short port; 720 721 /* Parse port@host */ 722 at = strchr(colon, '@'); 723 if (at == NULL) 724 { 725 if (tTd(64, 5)) 726 sm_dprintf("X%s: bad address %s (expected port@host)\n", 727 m->mf_name, colon); 728 if (parseonly) 729 syserr("X%s: bad address %s (expected port@host)", 730 m->mf_name, colon); 731 else if (MilterLogLevel > 10) 732 sm_syslog(LOG_ERR, e->e_id, 733 "Milter (%s): bad address %s (expected port@host)", 734 m->mf_name, colon); 735 milter_error(m, e); 736 return -1; 737 } 738 *at = '\0'; 739 if (isascii(*colon) && isdigit(*colon)) 740 port = htons((unsigned short) atoi(colon)); 741 else 742 { 743 # ifdef NO_GETSERVBYNAME 744 if (tTd(64, 5)) 745 sm_dprintf("X%s: invalid port number %s\n", 746 m->mf_name, colon); 747 if (parseonly) 748 syserr("X%s: invalid port number %s", 749 m->mf_name, colon); 750 else if (MilterLogLevel > 10) 751 sm_syslog(LOG_ERR, e->e_id, 752 "Milter (%s): invalid port number %s", 753 m->mf_name, colon); 754 milter_error(m, e); 755 return -1; 756 # else /* NO_GETSERVBYNAME */ 757 register struct servent *sp; 758 759 sp = getservbyname(colon, "tcp"); 760 if (sp == NULL) 761 { 762 save_errno = errno; 763 if (tTd(64, 5)) 764 sm_dprintf("X%s: unknown port name %s\n", 765 m->mf_name, colon); 766 errno = save_errno; 767 if (parseonly) 768 syserr("X%s: unknown port name %s", 769 m->mf_name, colon); 770 else if (MilterLogLevel > 10) 771 sm_syslog(LOG_ERR, e->e_id, 772 "Milter (%s): unknown port name %s", 773 m->mf_name, colon); 774 milter_error(m, e); 775 return -1; 776 } 777 port = sp->s_port; 778 # endif /* NO_GETSERVBYNAME */ 779 } 780 *at++ = '@'; 781 if (*at == '[') 782 { 783 char *end; 784 785 end = strchr(at, ']'); 786 if (end != NULL) 787 { 788 bool found = false; 789 # if NETINET 790 unsigned long hid = INADDR_NONE; 791 # endif /* NETINET */ 792 # if NETINET6 793 struct sockaddr_in6 hid6; 794 # endif /* NETINET6 */ 795 796 *end = '\0'; 797 # if NETINET 798 if (addr.sa.sa_family == AF_INET && 799 (hid = inet_addr(&at[1])) != INADDR_NONE) 800 { 801 addr.sin.sin_addr.s_addr = hid; 802 addr.sin.sin_port = port; 803 found = true; 804 } 805 # endif /* NETINET */ 806 # if NETINET6 807 (void) memset(&hid6, '\0', sizeof hid6); 808 if (addr.sa.sa_family == AF_INET6 && 809 anynet_pton(AF_INET6, &at[1], 810 &hid6.sin6_addr) == 1) 811 { 812 addr.sin6.sin6_addr = hid6.sin6_addr; 813 addr.sin6.sin6_port = port; 814 found = true; 815 } 816 # endif /* NETINET6 */ 817 *end = ']'; 818 if (!found) 819 { 820 if (tTd(64, 5)) 821 sm_dprintf("X%s: Invalid numeric domain spec \"%s\"\n", 822 m->mf_name, at); 823 if (parseonly) 824 syserr("X%s: Invalid numeric domain spec \"%s\"", 825 m->mf_name, at); 826 else if (MilterLogLevel > 10) 827 sm_syslog(LOG_ERR, e->e_id, 828 "Milter (%s): Invalid numeric domain spec \"%s\"", 829 m->mf_name, at); 830 milter_error(m, e); 831 return -1; 832 } 833 } 834 else 835 { 836 if (tTd(64, 5)) 837 sm_dprintf("X%s: Invalid numeric domain spec \"%s\"\n", 838 m->mf_name, at); 839 if (parseonly) 840 syserr("X%s: Invalid numeric domain spec \"%s\"", 841 m->mf_name, at); 842 else if (MilterLogLevel > 10) 843 sm_syslog(LOG_ERR, e->e_id, 844 "Milter (%s): Invalid numeric domain spec \"%s\"", 845 m->mf_name, at); 846 milter_error(m, e); 847 return -1; 848 } 849 } 850 else 851 { 852 hp = sm_gethostbyname(at, addr.sa.sa_family); 853 if (hp == NULL) 854 { 855 save_errno = errno; 856 if (tTd(64, 5)) 857 sm_dprintf("X%s: Unknown host name %s\n", 858 m->mf_name, at); 859 errno = save_errno; 860 if (parseonly) 861 syserr("X%s: Unknown host name %s", 862 m->mf_name, at); 863 else if (MilterLogLevel > 10) 864 sm_syslog(LOG_ERR, e->e_id, 865 "Milter (%s): Unknown host name %s", 866 m->mf_name, at); 867 milter_error(m, e); 868 return -1; 869 } 870 addr.sa.sa_family = hp->h_addrtype; 871 switch (hp->h_addrtype) 872 { 873 # if NETINET 874 case AF_INET: 875 memmove(&addr.sin.sin_addr, 876 hp->h_addr, INADDRSZ); 877 addr.sin.sin_port = port; 878 addrlen = sizeof (struct sockaddr_in); 879 addrno = 1; 880 break; 881 # endif /* NETINET */ 882 883 # if NETINET6 884 case AF_INET6: 885 memmove(&addr.sin6.sin6_addr, 886 hp->h_addr, IN6ADDRSZ); 887 addr.sin6.sin6_port = port; 888 addrlen = sizeof (struct sockaddr_in6); 889 addrno = 1; 890 break; 891 # endif /* NETINET6 */ 892 893 default: 894 if (tTd(64, 5)) 895 sm_dprintf("X%s: Unknown protocol for %s (%d)\n", 896 m->mf_name, at, 897 hp->h_addrtype); 898 if (parseonly) 899 syserr("X%s: Unknown protocol for %s (%d)", 900 m->mf_name, at, hp->h_addrtype); 901 else if (MilterLogLevel > 10) 902 sm_syslog(LOG_ERR, e->e_id, 903 "Milter (%s): Unknown protocol for %s (%d)", 904 m->mf_name, at, 905 hp->h_addrtype); 906 milter_error(m, e); 907 # if NETINET6 908 freehostent(hp); 909 # endif /* NETINET6 */ 910 return -1; 911 } 912 } 913 } 914 else 915 # endif /* NETINET || NETINET6 */ 916 { 917 if (tTd(64, 5)) 918 sm_dprintf("X%s: unknown socket protocol\n", 919 m->mf_name); 920 if (parseonly) 921 syserr("X%s: unknown socket protocol", m->mf_name); 922 else if (MilterLogLevel > 10) 923 sm_syslog(LOG_ERR, e->e_id, 924 "Milter (%s): unknown socket protocol", 925 m->mf_name); 926 milter_error(m, e); 927 return -1; 928 } 929 930 /* just parsing through? */ 931 if (parseonly) 932 { 933 m->mf_state = SMFS_READY; 934 # if NETINET6 935 if (hp != NULL) 936 freehostent(hp); 937 # endif /* NETINET6 */ 938 return 0; 939 } 940 941 /* sanity check */ 942 if (m->mf_state != SMFS_READY && 943 m->mf_state != SMFS_CLOSED) 944 { 945 /* shouldn't happen */ 946 if (tTd(64, 1)) 947 sm_dprintf("Milter (%s): Trying to open filter in state %c\n", 948 m->mf_name, (char) m->mf_state); 949 milter_error(m, e); 950 # if NETINET6 951 if (hp != NULL) 952 freehostent(hp); 953 # endif /* NETINET6 */ 954 return -1; 955 } 956 957 /* nope, actually connecting */ 958 for (;;) 959 { 960 sock = socket(addr.sa.sa_family, SOCK_STREAM, 0); 961 if (sock < 0) 962 { 963 save_errno = errno; 964 if (tTd(64, 5)) 965 sm_dprintf("Milter (%s): error creating socket: %s\n", 966 m->mf_name, 967 sm_errstring(save_errno)); 968 if (MilterLogLevel > 0) 969 sm_syslog(LOG_ERR, e->e_id, 970 "Milter (%s): error creating socket: %s", 971 m->mf_name, sm_errstring(save_errno)); 972 milter_error(m, e); 973 # if NETINET6 974 if (hp != NULL) 975 freehostent(hp); 976 # endif /* NETINET6 */ 977 return -1; 978 } 979 980 if (setjmp(MilterConnectTimeout) == 0) 981 { 982 SM_EVENT *ev = NULL; 983 int i; 984 985 if (m->mf_timeout[SMFTO_CONNECT] > 0) 986 ev = sm_setevent(m->mf_timeout[SMFTO_CONNECT], 987 milter_connect_timeout, 0); 988 989 i = connect(sock, (struct sockaddr *) &addr, addrlen); 990 save_errno = errno; 991 if (ev != NULL) 992 sm_clrevent(ev); 993 errno = save_errno; 994 if (i >= 0) 995 break; 996 } 997 998 /* couldn't connect.... try next address */ 999 save_errno = errno; 1000 p = CurHostName; 1001 CurHostName = at; 1002 if (tTd(64, 5)) 1003 sm_dprintf("milter_open (%s): open %s failed: %s\n", 1004 m->mf_name, at, sm_errstring(save_errno)); 1005 if (MilterLogLevel > 13) 1006 sm_syslog(LOG_INFO, e->e_id, 1007 "Milter (%s): open %s failed: %s", 1008 m->mf_name, at, sm_errstring(save_errno)); 1009 CurHostName = p; 1010 (void) close(sock); 1011 1012 /* try next address */ 1013 if (hp != NULL && hp->h_addr_list[addrno] != NULL) 1014 { 1015 switch (addr.sa.sa_family) 1016 { 1017 # if NETINET 1018 case AF_INET: 1019 memmove(&addr.sin.sin_addr, 1020 hp->h_addr_list[addrno++], 1021 INADDRSZ); 1022 break; 1023 # endif /* NETINET */ 1024 1025 # if NETINET6 1026 case AF_INET6: 1027 memmove(&addr.sin6.sin6_addr, 1028 hp->h_addr_list[addrno++], 1029 IN6ADDRSZ); 1030 break; 1031 # endif /* NETINET6 */ 1032 1033 default: 1034 if (tTd(64, 5)) 1035 sm_dprintf("X%s: Unknown protocol for %s (%d)\n", 1036 m->mf_name, at, 1037 hp->h_addrtype); 1038 if (MilterLogLevel > 0) 1039 sm_syslog(LOG_ERR, e->e_id, 1040 "Milter (%s): Unknown protocol for %s (%d)", 1041 m->mf_name, at, 1042 hp->h_addrtype); 1043 milter_error(m, e); 1044 # if NETINET6 1045 freehostent(hp); 1046 # endif /* NETINET6 */ 1047 return -1; 1048 } 1049 continue; 1050 } 1051 p = CurHostName; 1052 CurHostName = at; 1053 if (tTd(64, 5)) 1054 sm_dprintf("X%s: error connecting to filter: %s\n", 1055 m->mf_name, sm_errstring(save_errno)); 1056 if (MilterLogLevel > 0) 1057 sm_syslog(LOG_ERR, e->e_id, 1058 "Milter (%s): error connecting to filter: %s", 1059 m->mf_name, sm_errstring(save_errno)); 1060 CurHostName = p; 1061 milter_error(m, e); 1062 # if NETINET6 1063 if (hp != NULL) 1064 freehostent(hp); 1065 # endif /* NETINET6 */ 1066 return -1; 1067 } 1068 m->mf_state = SMFS_OPEN; 1069 # if NETINET6 1070 if (hp != NULL) 1071 { 1072 freehostent(hp); 1073 hp = NULL; 1074 } 1075 # endif /* NETINET6 */ 1076 return sock; 1077 } 1078 1079 static void 1080 milter_connect_timeout() 1081 { 1082 /* 1083 ** NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER. DO NOT ADD 1084 ** ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE 1085 ** DOING. 1086 */ 1087 1088 errno = ETIMEDOUT; 1089 longjmp(MilterConnectTimeout, 1); 1090 } 1091 /* 1092 ** MILTER_SETUP -- setup structure for a mail filter 1093 ** 1094 ** Parameters: 1095 ** line -- the options line. 1096 ** 1097 ** Returns: 1098 ** none 1099 */ 1100 1101 void 1102 milter_setup(line) 1103 char *line; 1104 { 1105 char fcode; 1106 register char *p; 1107 register struct milter *m; 1108 STAB *s; 1109 1110 /* collect the filter name */ 1111 for (p = line; 1112 *p != '\0' && *p != ',' && !(isascii(*p) && isspace(*p)); 1113 p++) 1114 continue; 1115 if (*p != '\0') 1116 *p++ = '\0'; 1117 if (line[0] == '\0') 1118 { 1119 syserr("name required for mail filter"); 1120 return; 1121 } 1122 m = (struct milter *) xalloc(sizeof *m); 1123 memset((char *) m, '\0', sizeof *m); 1124 m->mf_name = newstr(line); 1125 m->mf_state = SMFS_READY; 1126 m->mf_sock = -1; 1127 m->mf_timeout[SMFTO_CONNECT] = (time_t) 300; 1128 m->mf_timeout[SMFTO_WRITE] = (time_t) 10; 1129 m->mf_timeout[SMFTO_READ] = (time_t) 10; 1130 m->mf_timeout[SMFTO_EOM] = (time_t) 300; 1131 1132 /* now scan through and assign info from the fields */ 1133 while (*p != '\0') 1134 { 1135 char *delimptr; 1136 1137 while (*p != '\0' && 1138 (*p == ',' || (isascii(*p) && isspace(*p)))) 1139 p++; 1140 1141 /* p now points to field code */ 1142 fcode = *p; 1143 while (*p != '\0' && *p != '=' && *p != ',') 1144 p++; 1145 if (*p++ != '=') 1146 { 1147 syserr("X%s: `=' expected", m->mf_name); 1148 return; 1149 } 1150 while (isascii(*p) && isspace(*p)) 1151 p++; 1152 1153 /* p now points to the field body */ 1154 p = munchstring(p, &delimptr, ','); 1155 1156 /* install the field into the filter struct */ 1157 switch (fcode) 1158 { 1159 case 'S': /* socket */ 1160 if (p == NULL) 1161 m->mf_conn = NULL; 1162 else 1163 m->mf_conn = newstr(p); 1164 break; 1165 1166 case 'F': /* Milter flags configured on MTA */ 1167 for (; *p != '\0'; p++) 1168 { 1169 if (!(isascii(*p) && isspace(*p))) 1170 setbitn(bitidx(*p), m->mf_flags); 1171 } 1172 break; 1173 1174 case 'T': /* timeouts */ 1175 milter_parse_timeouts(p, m); 1176 break; 1177 1178 default: 1179 syserr("X%s: unknown filter equate %c=", 1180 m->mf_name, fcode); 1181 break; 1182 } 1183 p = delimptr; 1184 } 1185 1186 /* early check for errors */ 1187 (void) milter_open(m, true, CurEnv); 1188 1189 /* enter the filter into the symbol table */ 1190 s = stab(m->mf_name, ST_MILTER, ST_ENTER); 1191 if (s->s_milter != NULL) 1192 syserr("X%s: duplicate filter definition", m->mf_name); 1193 else 1194 s->s_milter = m; 1195 } 1196 /* 1197 ** MILTER_CONFIG -- parse option list into an array and check config 1198 ** 1199 ** Called when reading configuration file. 1200 ** 1201 ** Parameters: 1202 ** spec -- the filter list. 1203 ** list -- the array to fill in. 1204 ** max -- the maximum number of entries in list. 1205 ** 1206 ** Returns: 1207 ** none 1208 */ 1209 1210 void 1211 milter_config(spec, list, max) 1212 char *spec; 1213 struct milter **list; 1214 int max; 1215 { 1216 int numitems = 0; 1217 register char *p; 1218 1219 /* leave one for the NULL signifying the end of the list */ 1220 max--; 1221 1222 for (p = spec; p != NULL; ) 1223 { 1224 STAB *s; 1225 1226 while (isascii(*p) && isspace(*p)) 1227 p++; 1228 if (*p == '\0') 1229 break; 1230 spec = p; 1231 1232 if (numitems >= max) 1233 { 1234 syserr("Too many filters defined, %d max", max); 1235 if (max > 0) 1236 list[0] = NULL; 1237 return; 1238 } 1239 #if _FFR_MILTER_PERDAEMON 1240 p = strpbrk(p, ";,"); 1241 #else /* _FFR_MILTER_PERDAEMON */ 1242 p = strpbrk(p, ","); 1243 #endif /* _FFR_MILTER_PERDAEMON */ 1244 if (p != NULL) 1245 *p++ = '\0'; 1246 1247 s = stab(spec, ST_MILTER, ST_FIND); 1248 if (s == NULL) 1249 { 1250 syserr("InputFilter %s not defined", spec); 1251 ExitStat = EX_CONFIG; 1252 return; 1253 } 1254 list[numitems++] = s->s_milter; 1255 } 1256 list[numitems] = NULL; 1257 1258 /* if not set, set to LogLevel */ 1259 if (MilterLogLevel == -1) 1260 MilterLogLevel = LogLevel; 1261 } 1262 /* 1263 ** MILTER_PARSE_TIMEOUTS -- parse timeout list 1264 ** 1265 ** Called when reading configuration file. 1266 ** 1267 ** Parameters: 1268 ** spec -- the timeout list. 1269 ** m -- milter to set. 1270 ** 1271 ** Returns: 1272 ** none 1273 */ 1274 1275 static void 1276 milter_parse_timeouts(spec, m) 1277 char *spec; 1278 struct milter *m; 1279 { 1280 char fcode; 1281 register char *p; 1282 1283 p = spec; 1284 1285 /* now scan through and assign info from the fields */ 1286 while (*p != '\0') 1287 { 1288 char *delimptr; 1289 1290 while (*p != '\0' && 1291 (*p == ';' || (isascii(*p) && isspace(*p)))) 1292 p++; 1293 1294 /* p now points to field code */ 1295 fcode = *p; 1296 while (*p != '\0' && *p != ':') 1297 p++; 1298 if (*p++ != ':') 1299 { 1300 syserr("X%s, T=: `:' expected", m->mf_name); 1301 return; 1302 } 1303 while (isascii(*p) && isspace(*p)) 1304 p++; 1305 1306 /* p now points to the field body */ 1307 p = munchstring(p, &delimptr, ';'); 1308 1309 /* install the field into the filter struct */ 1310 switch (fcode) 1311 { 1312 case 'C': 1313 m->mf_timeout[SMFTO_CONNECT] = convtime(p, 's'); 1314 if (tTd(64, 5)) 1315 sm_dprintf("X%s: %c=%lu\n", 1316 m->mf_name, fcode, 1317 (unsigned long) m->mf_timeout[SMFTO_CONNECT]); 1318 break; 1319 1320 case 'S': 1321 m->mf_timeout[SMFTO_WRITE] = convtime(p, 's'); 1322 if (tTd(64, 5)) 1323 sm_dprintf("X%s: %c=%lu\n", 1324 m->mf_name, fcode, 1325 (unsigned long) m->mf_timeout[SMFTO_WRITE]); 1326 break; 1327 1328 case 'R': 1329 m->mf_timeout[SMFTO_READ] = convtime(p, 's'); 1330 if (tTd(64, 5)) 1331 sm_dprintf("X%s: %c=%lu\n", 1332 m->mf_name, fcode, 1333 (unsigned long) m->mf_timeout[SMFTO_READ]); 1334 break; 1335 1336 case 'E': 1337 m->mf_timeout[SMFTO_EOM] = convtime(p, 's'); 1338 if (tTd(64, 5)) 1339 sm_dprintf("X%s: %c=%lu\n", 1340 m->mf_name, fcode, 1341 (unsigned long) m->mf_timeout[SMFTO_EOM]); 1342 break; 1343 1344 default: 1345 if (tTd(64, 5)) 1346 sm_dprintf("X%s: %c unknown\n", 1347 m->mf_name, fcode); 1348 syserr("X%s: unknown filter timeout %c", 1349 m->mf_name, fcode); 1350 break; 1351 } 1352 p = delimptr; 1353 } 1354 } 1355 /* 1356 ** MILTER_SET_OPTION -- set an individual milter option 1357 ** 1358 ** Parameters: 1359 ** name -- the name of the option. 1360 ** val -- the value of the option. 1361 ** sticky -- if set, don't let other setoptions override 1362 ** this value. 1363 ** 1364 ** Returns: 1365 ** none. 1366 */ 1367 1368 /* set if Milter sub-option is stuck */ 1369 static BITMAP256 StickyMilterOpt; 1370 1371 static struct milteropt 1372 { 1373 char *mo_name; /* long name of milter option */ 1374 unsigned char mo_code; /* code for option */ 1375 } MilterOptTab[] = 1376 { 1377 # define MO_MACROS_CONNECT 0x01 1378 { "macros.connect", MO_MACROS_CONNECT }, 1379 # define MO_MACROS_HELO 0x02 1380 { "macros.helo", MO_MACROS_HELO }, 1381 # define MO_MACROS_ENVFROM 0x03 1382 { "macros.envfrom", MO_MACROS_ENVFROM }, 1383 # define MO_MACROS_ENVRCPT 0x04 1384 { "macros.envrcpt", MO_MACROS_ENVRCPT }, 1385 # define MO_LOGLEVEL 0x05 1386 { "loglevel", MO_LOGLEVEL }, 1387 { NULL, 0 }, 1388 }; 1389 1390 void 1391 milter_set_option(name, val, sticky) 1392 char *name; 1393 char *val; 1394 bool sticky; 1395 { 1396 int nummac = 0; 1397 register struct milteropt *mo; 1398 char *p; 1399 char **macros = NULL; 1400 1401 if (tTd(37, 2) || tTd(64, 5)) 1402 sm_dprintf("milter_set_option(%s = %s)", name, val); 1403 1404 for (mo = MilterOptTab; mo->mo_name != NULL; mo++) 1405 { 1406 if (sm_strcasecmp(mo->mo_name, name) == 0) 1407 break; 1408 } 1409 1410 if (mo->mo_name == NULL) 1411 { 1412 syserr("milter_set_option: invalid Milter option %s", name); 1413 return; 1414 } 1415 1416 /* 1417 ** See if this option is preset for us. 1418 */ 1419 1420 if (!sticky && bitnset(mo->mo_code, StickyMilterOpt)) 1421 { 1422 if (tTd(37, 2) || tTd(64,5)) 1423 sm_dprintf(" (ignored)\n"); 1424 return; 1425 } 1426 1427 if (tTd(37, 2) || tTd(64,5)) 1428 sm_dprintf("\n"); 1429 1430 switch (mo->mo_code) 1431 { 1432 case MO_LOGLEVEL: 1433 MilterLogLevel = atoi(val); 1434 break; 1435 1436 case MO_MACROS_CONNECT: 1437 if (macros == NULL) 1438 macros = MilterConnectMacros; 1439 /* FALLTHROUGH */ 1440 1441 case MO_MACROS_HELO: 1442 if (macros == NULL) 1443 macros = MilterHeloMacros; 1444 /* FALLTHROUGH */ 1445 1446 case MO_MACROS_ENVFROM: 1447 if (macros == NULL) 1448 macros = MilterEnvFromMacros; 1449 /* FALLTHROUGH */ 1450 1451 case MO_MACROS_ENVRCPT: 1452 if (macros == NULL) 1453 macros = MilterEnvRcptMacros; 1454 1455 p = newstr(val); 1456 while (*p != '\0') 1457 { 1458 char *macro; 1459 1460 /* Skip leading commas, spaces */ 1461 while (*p != '\0' && 1462 (*p == ',' || (isascii(*p) && isspace(*p)))) 1463 p++; 1464 1465 if (*p == '\0') 1466 break; 1467 1468 /* Find end of macro */ 1469 macro = p; 1470 while (*p != '\0' && *p != ',' && 1471 isascii(*p) && !isspace(*p)) 1472 p++; 1473 if (*p != '\0') 1474 *p++ = '\0'; 1475 1476 if (nummac >= MAXFILTERMACROS) 1477 { 1478 syserr("milter_set_option: too many macros in Milter.%s (max %d)", 1479 name, MAXFILTERMACROS); 1480 macros[nummac] = NULL; 1481 break; 1482 } 1483 macros[nummac++] = macro; 1484 } 1485 macros[nummac] = NULL; 1486 break; 1487 1488 default: 1489 syserr("milter_set_option: invalid Milter option %s", name); 1490 break; 1491 } 1492 if (sticky) 1493 setbitn(mo->mo_code, StickyMilterOpt); 1494 } 1495 /* 1496 ** MILTER_REOPEN_DF -- open & truncate the data file (for replbody) 1497 ** 1498 ** Parameters: 1499 ** e -- current envelope. 1500 ** 1501 ** Returns: 1502 ** 0 if succesful, -1 otherwise 1503 */ 1504 1505 static int 1506 milter_reopen_df(e) 1507 ENVELOPE *e; 1508 { 1509 char dfname[MAXPATHLEN]; 1510 1511 (void) sm_strlcpy(dfname, queuename(e, DATAFL_LETTER), sizeof dfname); 1512 1513 /* 1514 ** In SuperSafe == SAFE_REALLY mode, e->e_dfp is a read-only FP so 1515 ** close and reopen writable (later close and reopen 1516 ** read only again). 1517 ** 1518 ** In SuperSafe != SAFE_REALLY mode, e->e_dfp still points at the 1519 ** buffered file I/O descriptor, still open for writing 1520 ** so there isn't as much work to do, just truncate it 1521 ** and go. 1522 */ 1523 1524 if (SuperSafe == SAFE_REALLY) 1525 { 1526 /* close read-only data file */ 1527 if (bitset(EF_HAS_DF, e->e_flags) && e->e_dfp != NULL) 1528 { 1529 (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT); 1530 e->e_flags &= ~EF_HAS_DF; 1531 } 1532 1533 /* open writable */ 1534 if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname, 1535 SM_IO_RDWR, NULL)) == NULL) 1536 { 1537 MILTER_DF_ERROR("milter_reopen_df: sm_io_open %s: %s"); 1538 return -1; 1539 } 1540 } 1541 else if (e->e_dfp == NULL) 1542 { 1543 /* shouldn't happen */ 1544 errno = ENOENT; 1545 MILTER_DF_ERROR("milter_reopen_df: NULL e_dfp (%s: %s)"); 1546 return -1; 1547 } 1548 return 0; 1549 } 1550 /* 1551 ** MILTER_RESET_DF -- re-open read-only the data file (for replbody) 1552 ** 1553 ** Parameters: 1554 ** e -- current envelope. 1555 ** 1556 ** Returns: 1557 ** 0 if succesful, -1 otherwise 1558 */ 1559 1560 static int 1561 milter_reset_df(e) 1562 ENVELOPE *e; 1563 { 1564 int afd; 1565 char dfname[MAXPATHLEN]; 1566 1567 (void) sm_strlcpy(dfname, queuename(e, DATAFL_LETTER), sizeof dfname); 1568 1569 if (sm_io_flush(e->e_dfp, SM_TIME_DEFAULT) != 0 || 1570 sm_io_error(e->e_dfp)) 1571 { 1572 MILTER_DF_ERROR("milter_reset_df: error writing/flushing %s: %s"); 1573 return -1; 1574 } 1575 else if (SuperSafe != SAFE_REALLY) 1576 { 1577 /* skip next few clauses */ 1578 /* EMPTY */ 1579 } 1580 else if ((afd = sm_io_getinfo(e->e_dfp, SM_IO_WHAT_FD, NULL)) >= 0 1581 && fsync(afd) < 0) 1582 { 1583 MILTER_DF_ERROR("milter_reset_df: error sync'ing %s: %s"); 1584 return -1; 1585 } 1586 else if (sm_io_close(e->e_dfp, SM_TIME_DEFAULT) < 0) 1587 { 1588 MILTER_DF_ERROR("milter_reset_df: error closing %s: %s"); 1589 return -1; 1590 } 1591 else if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname, 1592 SM_IO_RDONLY, NULL)) == NULL) 1593 { 1594 MILTER_DF_ERROR("milter_reset_df: error reopening %s: %s"); 1595 return -1; 1596 } 1597 else 1598 e->e_flags |= EF_HAS_DF; 1599 return 0; 1600 } 1601 /* 1602 ** MILTER_CAN_DELRCPTS -- can any milter filters delete recipients? 1603 ** 1604 ** Parameters: 1605 ** none 1606 ** 1607 ** Returns: 1608 ** true if any filter deletes recipients, false otherwise 1609 */ 1610 1611 bool 1612 milter_can_delrcpts() 1613 { 1614 bool can = false; 1615 int i; 1616 1617 if (tTd(64, 10)) 1618 sm_dprintf("milter_can_delrcpts:"); 1619 1620 for (i = 0; InputFilters[i] != NULL; i++) 1621 { 1622 struct milter *m = InputFilters[i]; 1623 1624 if (bitset(SMFIF_DELRCPT, m->mf_fflags)) 1625 { 1626 can = true; 1627 break; 1628 } 1629 } 1630 if (tTd(64, 10)) 1631 sm_dprintf("%s\n", can ? "true" : "false"); 1632 1633 return can; 1634 } 1635 /* 1636 ** MILTER_QUIT_FILTER -- close down a single filter 1637 ** 1638 ** Parameters: 1639 ** m -- milter structure of filter to close down. 1640 ** e -- current envelope. 1641 ** 1642 ** Returns: 1643 ** none 1644 */ 1645 1646 static void 1647 milter_quit_filter(m, e) 1648 struct milter *m; 1649 ENVELOPE *e; 1650 { 1651 if (tTd(64, 10)) 1652 sm_dprintf("milter_quit_filter(%s)\n", m->mf_name); 1653 if (MilterLogLevel > 18) 1654 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): quit filter", 1655 m->mf_name); 1656 1657 /* Never replace error state */ 1658 if (m->mf_state == SMFS_ERROR) 1659 return; 1660 1661 if (m->mf_sock < 0 || 1662 m->mf_state == SMFS_CLOSED || 1663 m->mf_state == SMFS_READY) 1664 { 1665 m->mf_sock = -1; 1666 m->mf_state = SMFS_CLOSED; 1667 return; 1668 } 1669 1670 (void) milter_write(m, SMFIC_QUIT, (char *) NULL, 0, 1671 m->mf_timeout[SMFTO_WRITE], e); 1672 if (m->mf_sock >= 0) 1673 { 1674 (void) close(m->mf_sock); 1675 m->mf_sock = -1; 1676 } 1677 if (m->mf_state != SMFS_ERROR) 1678 m->mf_state = SMFS_CLOSED; 1679 } 1680 /* 1681 ** MILTER_ABORT_FILTER -- tell filter to abort current message 1682 ** 1683 ** Parameters: 1684 ** m -- milter structure of filter to abort. 1685 ** e -- current envelope. 1686 ** 1687 ** Returns: 1688 ** none 1689 */ 1690 1691 static void 1692 milter_abort_filter(m, e) 1693 struct milter *m; 1694 ENVELOPE *e; 1695 { 1696 if (tTd(64, 10)) 1697 sm_dprintf("milter_abort_filter(%s)\n", m->mf_name); 1698 if (MilterLogLevel > 10) 1699 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): abort filter", 1700 m->mf_name); 1701 1702 if (m->mf_sock < 0 || 1703 m->mf_state != SMFS_INMSG) 1704 return; 1705 1706 (void) milter_write(m, SMFIC_ABORT, (char *) NULL, 0, 1707 m->mf_timeout[SMFTO_WRITE], e); 1708 if (m->mf_state != SMFS_ERROR) 1709 m->mf_state = SMFS_DONE; 1710 } 1711 /* 1712 ** MILTER_SEND_MACROS -- provide macros to the filters 1713 ** 1714 ** Parameters: 1715 ** m -- milter to send macros to. 1716 ** macros -- macros to send for filter smfi_getsymval(). 1717 ** cmd -- which command the macros are associated with. 1718 ** e -- current envelope (for macro access). 1719 ** 1720 ** Returns: 1721 ** none 1722 */ 1723 1724 static void 1725 milter_send_macros(m, macros, cmd, e) 1726 struct milter *m; 1727 char **macros; 1728 char cmd; 1729 ENVELOPE *e; 1730 { 1731 int i; 1732 int mid; 1733 char *v; 1734 char *buf, *bp; 1735 ssize_t s; 1736 1737 /* sanity check */ 1738 if (macros == NULL || macros[0] == NULL) 1739 return; 1740 1741 /* put together data */ 1742 s = 1; /* for the command character */ 1743 for (i = 0; macros[i] != NULL; i++) 1744 { 1745 mid = macid(macros[i]); 1746 if (mid == 0) 1747 continue; 1748 v = macvalue(mid, e); 1749 if (v == NULL) 1750 continue; 1751 s += strlen(macros[i]) + 1 + strlen(v) + 1; 1752 } 1753 1754 if (s < 0) 1755 return; 1756 1757 buf = (char *) xalloc(s); 1758 bp = buf; 1759 *bp++ = cmd; 1760 for (i = 0; macros[i] != NULL; i++) 1761 { 1762 mid = macid(macros[i]); 1763 if (mid == 0) 1764 continue; 1765 v = macvalue(mid, e); 1766 if (v == NULL) 1767 continue; 1768 1769 if (tTd(64, 10)) 1770 sm_dprintf("milter_send_macros(%s, %c): %s=%s\n", 1771 m->mf_name, cmd, macros[i], v); 1772 1773 (void) sm_strlcpy(bp, macros[i], s - (bp - buf)); 1774 bp += strlen(bp) + 1; 1775 (void) sm_strlcpy(bp, v, s - (bp - buf)); 1776 bp += strlen(bp) + 1; 1777 } 1778 (void) milter_write(m, SMFIC_MACRO, buf, s, 1779 m->mf_timeout[SMFTO_WRITE], e); 1780 sm_free(buf); /* XXX */ 1781 } 1782 1783 /* 1784 ** MILTER_SEND_COMMAND -- send a command and return the response for a filter 1785 ** 1786 ** Parameters: 1787 ** m -- current milter filter 1788 ** command -- command to send. 1789 ** data -- optional command data. 1790 ** sz -- length of buf. 1791 ** e -- current envelope (for e->e_id). 1792 ** state -- return state word. 1793 ** 1794 ** Returns: 1795 ** response string (may be NULL) 1796 */ 1797 1798 static char * 1799 milter_send_command(m, command, data, sz, e, state) 1800 struct milter *m; 1801 char command; 1802 void *data; 1803 ssize_t sz; 1804 ENVELOPE *e; 1805 char *state; 1806 { 1807 char rcmd; 1808 ssize_t rlen; 1809 unsigned long skipflag; 1810 char *action; 1811 char *defresponse; 1812 char *response; 1813 1814 if (tTd(64, 10)) 1815 sm_dprintf("milter_send_command(%s): cmd %c len %ld\n", 1816 m->mf_name, (char) command, (long) sz); 1817 1818 /* find skip flag and default failure */ 1819 switch (command) 1820 { 1821 case SMFIC_CONNECT: 1822 skipflag = SMFIP_NOCONNECT; 1823 action = "connect"; 1824 defresponse = "554 Command rejected"; 1825 break; 1826 1827 case SMFIC_HELO: 1828 skipflag = SMFIP_NOHELO; 1829 action = "helo"; 1830 defresponse = "550 Command rejected"; 1831 break; 1832 1833 case SMFIC_MAIL: 1834 skipflag = SMFIP_NOMAIL; 1835 action = "mail"; 1836 defresponse = "550 5.7.1 Command rejected"; 1837 break; 1838 1839 case SMFIC_RCPT: 1840 skipflag = SMFIP_NORCPT; 1841 action = "rcpt"; 1842 defresponse = "550 5.7.1 Command rejected"; 1843 break; 1844 1845 case SMFIC_HEADER: 1846 skipflag = SMFIP_NOHDRS; 1847 action = "header"; 1848 defresponse = "550 5.7.1 Command rejected"; 1849 break; 1850 1851 case SMFIC_BODY: 1852 skipflag = SMFIP_NOBODY; 1853 action = "body"; 1854 defresponse = "554 5.7.1 Command rejected"; 1855 break; 1856 1857 case SMFIC_EOH: 1858 skipflag = SMFIP_NOEOH; 1859 action = "eoh"; 1860 defresponse = "550 5.7.1 Command rejected"; 1861 break; 1862 1863 case SMFIC_BODYEOB: 1864 case SMFIC_OPTNEG: 1865 case SMFIC_MACRO: 1866 case SMFIC_ABORT: 1867 case SMFIC_QUIT: 1868 /* NOTE: not handled by milter_send_command() */ 1869 /* FALLTHROUGH */ 1870 1871 default: 1872 skipflag = 0; 1873 action = "default"; 1874 defresponse = "550 5.7.1 Command rejected"; 1875 break; 1876 } 1877 1878 /* check if filter wants this command */ 1879 if (skipflag != 0 && 1880 bitset(skipflag, m->mf_pflags)) 1881 return NULL; 1882 1883 /* send the command to the filter */ 1884 (void) milter_write(m, command, data, sz, 1885 m->mf_timeout[SMFTO_WRITE], e); 1886 if (m->mf_state == SMFS_ERROR) 1887 { 1888 MILTER_CHECK_ERROR(return NULL); 1889 return NULL; 1890 } 1891 1892 /* get the response from the filter */ 1893 response = milter_read(m, &rcmd, &rlen, 1894 m->mf_timeout[SMFTO_READ], e); 1895 if (m->mf_state == SMFS_ERROR) 1896 { 1897 MILTER_CHECK_ERROR(return NULL); 1898 return NULL; 1899 } 1900 1901 if (tTd(64, 10)) 1902 sm_dprintf("milter_send_command(%s): returned %c\n", 1903 m->mf_name, (char) rcmd); 1904 1905 switch (rcmd) 1906 { 1907 case SMFIR_REPLYCODE: 1908 MILTER_CHECK_REPLYCODE(defresponse); 1909 if (MilterLogLevel > 10) 1910 sm_syslog(LOG_INFO, e->e_id, "milter=%s, action=%s, reject=%s", 1911 m->mf_name, action, response); 1912 *state = rcmd; 1913 break; 1914 1915 case SMFIR_REJECT: 1916 if (MilterLogLevel > 10) 1917 sm_syslog(LOG_INFO, e->e_id, "milter=%s, action=%s, reject", 1918 m->mf_name, action); 1919 *state = rcmd; 1920 break; 1921 1922 case SMFIR_DISCARD: 1923 if (MilterLogLevel > 10) 1924 sm_syslog(LOG_INFO, e->e_id, "milter=%s, action=%s, discard", 1925 m->mf_name, action); 1926 *state = rcmd; 1927 break; 1928 1929 case SMFIR_TEMPFAIL: 1930 if (MilterLogLevel > 10) 1931 sm_syslog(LOG_INFO, e->e_id, "milter=%s, action=%s, tempfail", 1932 m->mf_name, action); 1933 *state = rcmd; 1934 break; 1935 1936 case SMFIR_ACCEPT: 1937 /* this filter is done with message/connection */ 1938 if (command == SMFIC_HELO || 1939 command == SMFIC_CONNECT) 1940 m->mf_state = SMFS_CLOSABLE; 1941 else 1942 m->mf_state = SMFS_DONE; 1943 if (MilterLogLevel > 10) 1944 sm_syslog(LOG_INFO, e->e_id, "milter=%s, action=%s, accepted", 1945 m->mf_name, action); 1946 break; 1947 1948 case SMFIR_CONTINUE: 1949 /* if MAIL command is ok, filter is in message state */ 1950 if (command == SMFIC_MAIL) 1951 m->mf_state = SMFS_INMSG; 1952 if (MilterLogLevel > 12) 1953 sm_syslog(LOG_INFO, e->e_id, "milter=%s, action=%s, continue", 1954 m->mf_name, action); 1955 break; 1956 1957 default: 1958 /* Invalid response to command */ 1959 if (MilterLogLevel > 0) 1960 sm_syslog(LOG_ERR, e->e_id, 1961 "milter_send_command(%s): action=%s returned bogus response %c", 1962 m->mf_name, action, rcmd); 1963 milter_error(m, e); 1964 break; 1965 } 1966 1967 if (*state != SMFIR_REPLYCODE && 1968 response != NULL) 1969 { 1970 sm_free(response); /* XXX */ 1971 response = NULL; 1972 } 1973 return response; 1974 } 1975 1976 /* 1977 ** MILTER_COMMAND -- send a command and return the response for each filter 1978 ** 1979 ** Parameters: 1980 ** command -- command to send. 1981 ** data -- optional command data. 1982 ** sz -- length of buf. 1983 ** macros -- macros to send for filter smfi_getsymval(). 1984 ** e -- current envelope (for macro access). 1985 ** state -- return state word. 1986 ** 1987 ** Returns: 1988 ** response string (may be NULL) 1989 */ 1990 1991 static char * 1992 milter_command(command, data, sz, macros, e, state) 1993 char command; 1994 void *data; 1995 ssize_t sz; 1996 char **macros; 1997 ENVELOPE *e; 1998 char *state; 1999 { 2000 int i; 2001 char *response = NULL; 2002 time_t tn = 0; 2003 2004 if (tTd(64, 10)) 2005 sm_dprintf("milter_command: cmd %c len %ld\n", 2006 (char) command, (long) sz); 2007 2008 *state = SMFIR_CONTINUE; 2009 for (i = 0; InputFilters[i] != NULL; i++) 2010 { 2011 struct milter *m = InputFilters[i]; 2012 2013 /* previous problem? */ 2014 if (m->mf_state == SMFS_ERROR) 2015 { 2016 MILTER_CHECK_ERROR(continue); 2017 break; 2018 } 2019 2020 /* sanity check */ 2021 if (m->mf_sock < 0 || 2022 (m->mf_state != SMFS_OPEN && m->mf_state != SMFS_INMSG)) 2023 continue; 2024 2025 /* send macros (regardless of whether we send command) */ 2026 if (macros != NULL && macros[0] != NULL) 2027 { 2028 milter_send_macros(m, macros, command, e); 2029 if (m->mf_state == SMFS_ERROR) 2030 { 2031 MILTER_CHECK_ERROR(continue); 2032 break; 2033 } 2034 } 2035 2036 if (MilterLogLevel > 21) 2037 tn = curtime(); 2038 2039 response = milter_send_command(m, command, data, sz, e, state); 2040 2041 if (MilterLogLevel > 21) 2042 { 2043 /* log the time it took for the command per filter */ 2044 sm_syslog(LOG_INFO, e->e_id, 2045 "Milter (%s): time command (%c), %d", 2046 m->mf_name, command, (int) (tn - curtime())); 2047 } 2048 2049 if (*state != SMFIR_CONTINUE) 2050 break; 2051 } 2052 return response; 2053 } 2054 /* 2055 ** MILTER_NEGOTIATE -- get version and flags from filter 2056 ** 2057 ** Parameters: 2058 ** m -- milter filter structure. 2059 ** e -- current envelope. 2060 ** 2061 ** Returns: 2062 ** 0 on success, -1 otherwise 2063 */ 2064 2065 static int 2066 milter_negotiate(m, e) 2067 struct milter *m; 2068 ENVELOPE *e; 2069 { 2070 char rcmd; 2071 mi_int32 fvers; 2072 mi_int32 fflags; 2073 mi_int32 pflags; 2074 char *response; 2075 ssize_t rlen; 2076 char data[MILTER_OPTLEN]; 2077 2078 /* sanity check */ 2079 if (m->mf_sock < 0 || m->mf_state != SMFS_OPEN) 2080 { 2081 if (MilterLogLevel > 0) 2082 sm_syslog(LOG_ERR, e->e_id, 2083 "Milter (%s): negotiate, impossible state", 2084 m->mf_name); 2085 milter_error(m, e); 2086 return -1; 2087 } 2088 2089 fvers = htonl(SMFI_VERSION); 2090 fflags = htonl(SMFI_CURR_ACTS); 2091 pflags = htonl(SMFI_CURR_PROT); 2092 (void) memcpy(data, (char *) &fvers, MILTER_LEN_BYTES); 2093 (void) memcpy(data + MILTER_LEN_BYTES, 2094 (char *) &fflags, MILTER_LEN_BYTES); 2095 (void) memcpy(data + (MILTER_LEN_BYTES * 2), 2096 (char *) &pflags, MILTER_LEN_BYTES); 2097 (void) milter_write(m, SMFIC_OPTNEG, data, sizeof data, 2098 m->mf_timeout[SMFTO_WRITE], e); 2099 2100 if (m->mf_state == SMFS_ERROR) 2101 return -1; 2102 2103 response = milter_read(m, &rcmd, &rlen, m->mf_timeout[SMFTO_READ], e); 2104 if (m->mf_state == SMFS_ERROR) 2105 return -1; 2106 2107 if (rcmd != SMFIC_OPTNEG) 2108 { 2109 if (tTd(64, 5)) 2110 sm_dprintf("milter_negotiate(%s): returned %c instead of %c\n", 2111 m->mf_name, rcmd, SMFIC_OPTNEG); 2112 if (MilterLogLevel > 0) 2113 sm_syslog(LOG_ERR, e->e_id, 2114 "Milter (%s): negotiate: returned %c instead of %c", 2115 m->mf_name, rcmd, SMFIC_OPTNEG); 2116 if (response != NULL) 2117 sm_free(response); /* XXX */ 2118 milter_error(m, e); 2119 return -1; 2120 } 2121 2122 /* Make sure we have enough bytes for the version */ 2123 if (response == NULL || rlen < MILTER_LEN_BYTES) 2124 { 2125 if (tTd(64, 5)) 2126 sm_dprintf("milter_negotiate(%s): did not return valid info\n", 2127 m->mf_name); 2128 if (MilterLogLevel > 0) 2129 sm_syslog(LOG_ERR, e->e_id, 2130 "Milter (%s): negotiate: did not return valid info", 2131 m->mf_name); 2132 if (response != NULL) 2133 sm_free(response); /* XXX */ 2134 milter_error(m, e); 2135 return -1; 2136 } 2137 2138 /* extract information */ 2139 (void) memcpy((char *) &fvers, response, MILTER_LEN_BYTES); 2140 2141 /* Now make sure we have enough for the feature bitmap */ 2142 if (rlen != MILTER_OPTLEN) 2143 { 2144 if (tTd(64, 5)) 2145 sm_dprintf("milter_negotiate(%s): did not return enough info\n", 2146 m->mf_name); 2147 if (MilterLogLevel > 0) 2148 sm_syslog(LOG_ERR, e->e_id, 2149 "Milter (%s): negotiate: did not return enough info", 2150 m->mf_name); 2151 if (response != NULL) 2152 sm_free(response); /* XXX */ 2153 milter_error(m, e); 2154 return -1; 2155 } 2156 2157 (void) memcpy((char *) &fflags, response + MILTER_LEN_BYTES, 2158 MILTER_LEN_BYTES); 2159 (void) memcpy((char *) &pflags, response + (MILTER_LEN_BYTES * 2), 2160 MILTER_LEN_BYTES); 2161 sm_free(response); /* XXX */ 2162 response = NULL; 2163 2164 m->mf_fvers = ntohl(fvers); 2165 m->mf_fflags = ntohl(fflags); 2166 m->mf_pflags = ntohl(pflags); 2167 2168 /* check for version compatibility */ 2169 if (m->mf_fvers == 1 || 2170 m->mf_fvers > SMFI_VERSION) 2171 { 2172 if (tTd(64, 5)) 2173 sm_dprintf("milter_negotiate(%s): version %d != MTA milter version %d\n", 2174 m->mf_name, m->mf_fvers, SMFI_VERSION); 2175 if (MilterLogLevel > 0) 2176 sm_syslog(LOG_ERR, e->e_id, 2177 "Milter (%s): negotiate: version %d != MTA milter version %d", 2178 m->mf_name, m->mf_fvers, SMFI_VERSION); 2179 milter_error(m, e); 2180 return -1; 2181 } 2182 2183 /* check for filter feature mismatch */ 2184 if ((m->mf_fflags & SMFI_CURR_ACTS) != m->mf_fflags) 2185 { 2186 if (tTd(64, 5)) 2187 sm_dprintf("milter_negotiate(%s): filter abilities 0x%x != MTA milter abilities 0x%lx\n", 2188 m->mf_name, m->mf_fflags, 2189 SMFI_CURR_ACTS); 2190 if (MilterLogLevel > 0) 2191 sm_syslog(LOG_ERR, e->e_id, 2192 "Milter (%s): negotiate: filter abilities 0x%x != MTA milter abilities 0x%lx", 2193 m->mf_name, m->mf_fflags, 2194 (unsigned long) SMFI_CURR_ACTS); 2195 milter_error(m, e); 2196 return -1; 2197 } 2198 2199 /* check for protocol feature mismatch */ 2200 if ((m->mf_pflags & SMFI_CURR_PROT) != m->mf_pflags) 2201 { 2202 if (tTd(64, 5)) 2203 sm_dprintf("milter_negotiate(%s): protocol abilities 0x%x != MTA milter abilities 0x%lx\n", 2204 m->mf_name, m->mf_pflags, 2205 (unsigned long) SMFI_CURR_PROT); 2206 if (MilterLogLevel > 0) 2207 sm_syslog(LOG_ERR, e->e_id, 2208 "Milter (%s): negotiate: protocol abilities 0x%x != MTA milter abilities 0x%lx", 2209 m->mf_name, m->mf_pflags, 2210 (unsigned long) SMFI_CURR_PROT); 2211 milter_error(m, e); 2212 return -1; 2213 } 2214 2215 if (tTd(64, 5)) 2216 sm_dprintf("milter_negotiate(%s): version %u, fflags 0x%x, pflags 0x%x\n", 2217 m->mf_name, m->mf_fvers, m->mf_fflags, m->mf_pflags); 2218 return 0; 2219 } 2220 /* 2221 ** MILTER_PER_CONNECTION_CHECK -- checks on per-connection commands 2222 ** 2223 ** Reduce code duplication by putting these checks in one place 2224 ** 2225 ** Parameters: 2226 ** e -- current envelope. 2227 ** 2228 ** Returns: 2229 ** none 2230 */ 2231 2232 static void 2233 milter_per_connection_check(e) 2234 ENVELOPE *e; 2235 { 2236 int i; 2237 2238 /* see if we are done with any of the filters */ 2239 for (i = 0; InputFilters[i] != NULL; i++) 2240 { 2241 struct milter *m = InputFilters[i]; 2242 2243 if (m->mf_state == SMFS_CLOSABLE) 2244 milter_quit_filter(m, e); 2245 } 2246 } 2247 /* 2248 ** MILTER_ERROR -- Put a milter filter into error state 2249 ** 2250 ** Parameters: 2251 ** m -- the broken filter. 2252 ** 2253 ** Returns: 2254 ** none 2255 */ 2256 2257 static void 2258 milter_error(m, e) 2259 struct milter *m; 2260 ENVELOPE *e; 2261 { 2262 /* 2263 ** We could send a quit here but 2264 ** we may have gotten here due to 2265 ** an I/O error so we don't want 2266 ** to try to make things worse. 2267 */ 2268 2269 if (m->mf_sock >= 0) 2270 { 2271 (void) close(m->mf_sock); 2272 m->mf_sock = -1; 2273 } 2274 m->mf_state = SMFS_ERROR; 2275 2276 if (MilterLogLevel > 0) 2277 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): to error state", 2278 m->mf_name); 2279 } 2280 /* 2281 ** MILTER_HEADERS -- send headers to a single milter filter 2282 ** 2283 ** Parameters: 2284 ** m -- current filter. 2285 ** e -- current envelope. 2286 ** state -- return state from response. 2287 ** 2288 ** Returns: 2289 ** response string (may be NULL) 2290 */ 2291 2292 static char * 2293 milter_headers(m, e, state) 2294 struct milter *m; 2295 ENVELOPE *e; 2296 char *state; 2297 { 2298 char *response = NULL; 2299 HDR *h; 2300 2301 if (MilterLogLevel > 17) 2302 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): headers, send", 2303 m->mf_name); 2304 2305 for (h = e->e_header; h != NULL; h = h->h_link) 2306 { 2307 char *buf; 2308 ssize_t s; 2309 2310 /* don't send over deleted headers */ 2311 if (h->h_value == NULL) 2312 { 2313 /* strip H_USER so not counted in milter_chgheader() */ 2314 h->h_flags &= ~H_USER; 2315 continue; 2316 } 2317 2318 /* skip auto-generated */ 2319 if (!bitset(H_USER, h->h_flags)) 2320 continue; 2321 2322 if (tTd(64, 10)) 2323 sm_dprintf("milter_headers: %s: %s\n", 2324 h->h_field, h->h_value); 2325 if (MilterLogLevel > 21) 2326 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): header, %s", 2327 m->mf_name, h->h_field); 2328 2329 s = strlen(h->h_field) + 1 + strlen(h->h_value) + 1; 2330 if (s < 0) 2331 continue; 2332 buf = (char *) xalloc(s); 2333 (void) sm_snprintf(buf, s, "%s%c%s", 2334 h->h_field, '\0', h->h_value); 2335 2336 /* send it over */ 2337 response = milter_send_command(m, SMFIC_HEADER, buf, 2338 s, e, state); 2339 sm_free(buf); /* XXX */ 2340 if (m->mf_state == SMFS_ERROR || 2341 m->mf_state == SMFS_DONE || 2342 *state != SMFIR_CONTINUE) 2343 break; 2344 } 2345 if (MilterLogLevel > 17) 2346 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): headers, sent", 2347 m->mf_name); 2348 return response; 2349 } 2350 /* 2351 ** MILTER_BODY -- send the body to a filter 2352 ** 2353 ** Parameters: 2354 ** m -- current filter. 2355 ** e -- current envelope. 2356 ** state -- return state from response. 2357 ** 2358 ** Returns: 2359 ** response string (may be NULL) 2360 */ 2361 2362 static char * 2363 milter_body(m, e, state) 2364 struct milter *m; 2365 ENVELOPE *e; 2366 char *state; 2367 { 2368 char bufchar = '\0'; 2369 char prevchar = '\0'; 2370 int c; 2371 char *response = NULL; 2372 char *bp; 2373 char buf[MILTER_CHUNK_SIZE]; 2374 2375 if (tTd(64, 10)) 2376 sm_dprintf("milter_body\n"); 2377 2378 if (bfrewind(e->e_dfp) < 0) 2379 { 2380 ExitStat = EX_IOERR; 2381 *state = SMFIR_TEMPFAIL; 2382 syserr("milter_body: %s/%cf%s: rewind error", 2383 qid_printqueue(e->e_qgrp, e->e_qdir), 2384 DATAFL_LETTER, e->e_id); 2385 return NULL; 2386 } 2387 2388 if (MilterLogLevel > 17) 2389 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): body, send", 2390 m->mf_name); 2391 bp = buf; 2392 while ((c = sm_io_getc(e->e_dfp, SM_TIME_DEFAULT)) != SM_IO_EOF) 2393 { 2394 /* Change LF to CRLF */ 2395 if (c == '\n') 2396 { 2397 /* Not a CRLF already? */ 2398 if (prevchar != '\r') 2399 { 2400 /* Room for CR now? */ 2401 if (bp + 2 > &buf[sizeof buf]) 2402 { 2403 /* No room, buffer LF */ 2404 bufchar = c; 2405 2406 /* and send CR now */ 2407 c = '\r'; 2408 } 2409 else 2410 { 2411 /* Room to do it now */ 2412 *bp++ = '\r'; 2413 prevchar = '\r'; 2414 } 2415 } 2416 } 2417 *bp++ = (char) c; 2418 prevchar = c; 2419 if (bp >= &buf[sizeof buf]) 2420 { 2421 /* send chunk */ 2422 response = milter_send_command(m, SMFIC_BODY, buf, 2423 bp - buf, e, state); 2424 bp = buf; 2425 if (bufchar != '\0') 2426 { 2427 *bp++ = bufchar; 2428 bufchar = '\0'; 2429 prevchar = bufchar; 2430 } 2431 } 2432 if (m->mf_state == SMFS_ERROR || 2433 m->mf_state == SMFS_DONE || 2434 *state != SMFIR_CONTINUE) 2435 break; 2436 } 2437 2438 /* check for read errors */ 2439 if (sm_io_error(e->e_dfp)) 2440 { 2441 ExitStat = EX_IOERR; 2442 if (*state == SMFIR_CONTINUE || 2443 *state == SMFIR_ACCEPT) 2444 { 2445 *state = SMFIR_TEMPFAIL; 2446 if (response != NULL) 2447 { 2448 sm_free(response); /* XXX */ 2449 response = NULL; 2450 } 2451 } 2452 syserr("milter_body: %s/%cf%s: read error", 2453 qid_printqueue(e->e_qgrp, e->e_qdir), 2454 DATAFL_LETTER, e->e_id); 2455 return response; 2456 } 2457 2458 /* send last body chunk */ 2459 if (bp > buf && 2460 m->mf_state != SMFS_ERROR && 2461 m->mf_state != SMFS_DONE && 2462 *state == SMFIR_CONTINUE) 2463 { 2464 /* send chunk */ 2465 response = milter_send_command(m, SMFIC_BODY, buf, bp - buf, 2466 e, state); 2467 bp = buf; 2468 } 2469 if (MilterLogLevel > 17) 2470 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): body, sent", 2471 m->mf_name); 2472 return response; 2473 } 2474 2475 /* 2476 ** Actions 2477 */ 2478 2479 /* 2480 ** MILTER_ADDHEADER -- Add the supplied header to the message 2481 ** 2482 ** Parameters: 2483 ** response -- encoded form of header/value. 2484 ** rlen -- length of response. 2485 ** e -- current envelope. 2486 ** 2487 ** Returns: 2488 ** none 2489 */ 2490 2491 static void 2492 milter_addheader(response, rlen, e) 2493 char *response; 2494 ssize_t rlen; 2495 ENVELOPE *e; 2496 { 2497 char *val; 2498 HDR *h; 2499 2500 if (tTd(64, 10)) 2501 sm_dprintf("milter_addheader: "); 2502 2503 /* sanity checks */ 2504 if (response == NULL) 2505 { 2506 if (tTd(64, 10)) 2507 sm_dprintf("NULL response\n"); 2508 return; 2509 } 2510 2511 if (rlen < 2 || strlen(response) + 1 >= (size_t) rlen) 2512 { 2513 if (tTd(64, 10)) 2514 sm_dprintf("didn't follow protocol (total len)\n"); 2515 return; 2516 } 2517 2518 /* Find separating NUL */ 2519 val = response + strlen(response) + 1; 2520 2521 /* another sanity check */ 2522 if (strlen(response) + strlen(val) + 2 != (size_t) rlen) 2523 { 2524 if (tTd(64, 10)) 2525 sm_dprintf("didn't follow protocol (part len)\n"); 2526 return; 2527 } 2528 2529 if (*response == '\0') 2530 { 2531 if (tTd(64, 10)) 2532 sm_dprintf("empty field name\n"); 2533 return; 2534 } 2535 2536 for (h = e->e_header; h != NULL; h = h->h_link) 2537 { 2538 if (sm_strcasecmp(h->h_field, response) == 0 && 2539 !bitset(H_USER, h->h_flags) && 2540 !bitset(H_TRACE, h->h_flags)) 2541 break; 2542 } 2543 2544 /* add to e_msgsize */ 2545 e->e_msgsize += strlen(response) + 2 + strlen(val); 2546 2547 if (h != NULL) 2548 { 2549 if (tTd(64, 10)) 2550 sm_dprintf("Replace default header %s value with %s\n", 2551 h->h_field, val); 2552 if (MilterLogLevel > 8) 2553 sm_syslog(LOG_INFO, e->e_id, 2554 "Milter change: default header %s value with %s", 2555 h->h_field, val); 2556 h->h_value = newstr(val); 2557 h->h_flags |= H_USER; 2558 } 2559 else 2560 { 2561 if (tTd(64, 10)) 2562 sm_dprintf("Add %s: %s\n", response, val); 2563 if (MilterLogLevel > 8) 2564 sm_syslog(LOG_INFO, e->e_id, "Milter add: header: %s: %s", 2565 response, val); 2566 addheader(newstr(response), val, H_USER, e); 2567 } 2568 } 2569 /* 2570 ** MILTER_CHANGEHEADER -- Change the supplied header in the message 2571 ** 2572 ** Parameters: 2573 ** response -- encoded form of header/index/value. 2574 ** rlen -- length of response. 2575 ** e -- current envelope. 2576 ** 2577 ** Returns: 2578 ** none 2579 */ 2580 2581 static void 2582 milter_changeheader(response, rlen, e) 2583 char *response; 2584 ssize_t rlen; 2585 ENVELOPE *e; 2586 { 2587 mi_int32 i, index; 2588 char *field, *val; 2589 HDR *h, *sysheader; 2590 2591 if (tTd(64, 10)) 2592 sm_dprintf("milter_changeheader: "); 2593 2594 /* sanity checks */ 2595 if (response == NULL) 2596 { 2597 if (tTd(64, 10)) 2598 sm_dprintf("NULL response\n"); 2599 return; 2600 } 2601 2602 if (rlen < 2 || strlen(response) + 1 >= (size_t) rlen) 2603 { 2604 if (tTd(64, 10)) 2605 sm_dprintf("didn't follow protocol (total len)\n"); 2606 return; 2607 } 2608 2609 /* Find separating NUL */ 2610 (void) memcpy((char *) &i, response, MILTER_LEN_BYTES); 2611 index = ntohl(i); 2612 field = response + MILTER_LEN_BYTES; 2613 val = field + strlen(field) + 1; 2614 2615 /* another sanity check */ 2616 if (MILTER_LEN_BYTES + strlen(field) + 1 + 2617 strlen(val) + 1 != (size_t) rlen) 2618 { 2619 if (tTd(64, 10)) 2620 sm_dprintf("didn't follow protocol (part len)\n"); 2621 return; 2622 } 2623 2624 if (*field == '\0') 2625 { 2626 if (tTd(64, 10)) 2627 sm_dprintf("empty field name\n"); 2628 return; 2629 } 2630 2631 sysheader = NULL; 2632 for (h = e->e_header; h != NULL; h = h->h_link) 2633 { 2634 if (sm_strcasecmp(h->h_field, field) == 0) 2635 { 2636 if (bitset(H_USER, h->h_flags) && 2637 --index <= 0) 2638 { 2639 sysheader = NULL; 2640 break; 2641 } 2642 else if (!bitset(H_USER, h->h_flags) && 2643 !bitset(H_TRACE, h->h_flags)) 2644 { 2645 /* 2646 ** DRUMS msg-fmt draft says can only have 2647 ** multiple occurences of trace fields, 2648 ** so make sure we replace any non-trace, 2649 ** non-user field. 2650 */ 2651 2652 sysheader = h; 2653 } 2654 } 2655 } 2656 2657 /* if not found as user-provided header at index, use sysheader */ 2658 if (h == NULL) 2659 h = sysheader; 2660 2661 if (h == NULL) 2662 { 2663 if (*val == '\0') 2664 { 2665 if (tTd(64, 10)) 2666 sm_dprintf("Delete (noop) %s:\n", field); 2667 } 2668 else 2669 { 2670 /* treat modify value with no existing header as add */ 2671 if (tTd(64, 10)) 2672 sm_dprintf("Add %s: %s\n", field, val); 2673 addheader(newstr(field), val, H_USER, e); 2674 } 2675 return; 2676 } 2677 2678 if (tTd(64, 10)) 2679 { 2680 if (*val == '\0') 2681 { 2682 sm_dprintf("Delete%s %s: %s\n", 2683 h == sysheader ? " (default header)" : "", 2684 field, 2685 h->h_value == NULL ? "<NULL>" : h->h_value); 2686 } 2687 else 2688 { 2689 sm_dprintf("Change%s %s: from %s to %s\n", 2690 h == sysheader ? " (default header)" : "", 2691 field, 2692 h->h_value == NULL ? "<NULL>" : h->h_value, 2693 val); 2694 } 2695 } 2696 2697 if (MilterLogLevel > 8) 2698 { 2699 if (*val == '\0') 2700 { 2701 sm_syslog(LOG_INFO, e->e_id, 2702 "Milter delete: header %s %s: %s", 2703 h == sysheader ? " (default header)" : "", 2704 field, 2705 h->h_value == NULL ? "<NULL>" : h->h_value); 2706 } 2707 else 2708 { 2709 sm_syslog(LOG_INFO, e->e_id, 2710 "Milter change: header %s %s: from %s to %s", 2711 h == sysheader ? " (default header)" : "", 2712 field, 2713 h->h_value == NULL ? "<NULL>" : h->h_value, 2714 val); 2715 } 2716 } 2717 2718 if (h != sysheader && h->h_value != NULL) 2719 { 2720 size_t l; 2721 2722 l = strlen(h->h_value); 2723 if (l > e->e_msgsize) 2724 e->e_msgsize = 0; 2725 else 2726 e->e_msgsize -= l; 2727 /* rpool, don't free: sm_free(h->h_value); XXX */ 2728 } 2729 2730 if (*val == '\0') 2731 { 2732 /* Remove "Field: " from message size */ 2733 if (h != sysheader) 2734 { 2735 size_t l; 2736 2737 l = strlen(h->h_field) + 2; 2738 if (l > e->e_msgsize) 2739 e->e_msgsize = 0; 2740 else 2741 e->e_msgsize -= l; 2742 } 2743 h->h_value = NULL; 2744 } 2745 else 2746 { 2747 h->h_value = newstr(val); 2748 h->h_flags |= H_USER; 2749 e->e_msgsize += strlen(h->h_value); 2750 } 2751 } 2752 /* 2753 ** MILTER_ADDRCPT -- Add the supplied recipient to the message 2754 ** 2755 ** Parameters: 2756 ** response -- encoded form of recipient address. 2757 ** rlen -- length of response. 2758 ** e -- current envelope. 2759 ** 2760 ** Returns: 2761 ** none 2762 */ 2763 2764 static void 2765 milter_addrcpt(response, rlen, e) 2766 char *response; 2767 ssize_t rlen; 2768 ENVELOPE *e; 2769 { 2770 if (tTd(64, 10)) 2771 sm_dprintf("milter_addrcpt: "); 2772 2773 /* sanity checks */ 2774 if (response == NULL) 2775 { 2776 if (tTd(64, 10)) 2777 sm_dprintf("NULL response\n"); 2778 return; 2779 } 2780 2781 if (*response == '\0' || 2782 strlen(response) + 1 != (size_t) rlen) 2783 { 2784 if (tTd(64, 10)) 2785 sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n", 2786 (int) strlen(response), (int) (rlen - 1)); 2787 return; 2788 } 2789 2790 if (tTd(64, 10)) 2791 sm_dprintf("%s\n", response); 2792 if (MilterLogLevel > 8) 2793 sm_syslog(LOG_INFO, e->e_id, "Milter add: rcpt: %s", response); 2794 (void) sendtolist(response, NULLADDR, &e->e_sendqueue, 0, e); 2795 return; 2796 } 2797 /* 2798 ** MILTER_DELRCPT -- Delete the supplied recipient from the message 2799 ** 2800 ** Parameters: 2801 ** response -- encoded form of recipient address. 2802 ** rlen -- length of response. 2803 ** e -- current envelope. 2804 ** 2805 ** Returns: 2806 ** none 2807 */ 2808 2809 static void 2810 milter_delrcpt(response, rlen, e) 2811 char *response; 2812 ssize_t rlen; 2813 ENVELOPE *e; 2814 { 2815 if (tTd(64, 10)) 2816 sm_dprintf("milter_delrcpt: "); 2817 2818 /* sanity checks */ 2819 if (response == NULL) 2820 { 2821 if (tTd(64, 10)) 2822 sm_dprintf("NULL response\n"); 2823 return; 2824 } 2825 2826 if (*response == '\0' || 2827 strlen(response) + 1 != (size_t) rlen) 2828 { 2829 if (tTd(64, 10)) 2830 sm_dprintf("didn't follow protocol (total len)\n"); 2831 return; 2832 } 2833 2834 if (tTd(64, 10)) 2835 sm_dprintf("%s\n", response); 2836 if (MilterLogLevel > 8) 2837 sm_syslog(LOG_INFO, e->e_id, "Milter delete: rcpt %s", 2838 response); 2839 (void) removefromlist(response, &e->e_sendqueue, e); 2840 return; 2841 } 2842 /* 2843 ** MILTER_REPLBODY -- Replace the current data file with new body 2844 ** 2845 ** Parameters: 2846 ** response -- encoded form of new body. 2847 ** rlen -- length of response. 2848 ** newfilter -- if first time called by a new filter 2849 ** e -- current envelope. 2850 ** 2851 ** Returns: 2852 ** 0 upon success, -1 upon failure 2853 */ 2854 2855 static int 2856 milter_replbody(response, rlen, newfilter, e) 2857 char *response; 2858 ssize_t rlen; 2859 bool newfilter; 2860 ENVELOPE *e; 2861 { 2862 static char prevchar; 2863 int i; 2864 2865 if (tTd(64, 10)) 2866 sm_dprintf("milter_replbody\n"); 2867 2868 /* If a new filter, reset previous character and truncate data file */ 2869 if (newfilter) 2870 { 2871 off_t prevsize; 2872 char dfname[MAXPATHLEN]; 2873 2874 (void) sm_strlcpy(dfname, queuename(e, DATAFL_LETTER), 2875 sizeof dfname); 2876 2877 /* Reset prevchar */ 2878 prevchar = '\0'; 2879 2880 /* Get the current data file information */ 2881 prevsize = sm_io_getinfo(e->e_dfp, SM_IO_WHAT_SIZE, NULL); 2882 if (prevsize < 0) 2883 prevsize = 0; 2884 2885 /* truncate current data file */ 2886 if (sm_io_getinfo(e->e_dfp, SM_IO_WHAT_ISTYPE, BF_FILE_TYPE)) 2887 { 2888 if (sm_io_setinfo(e->e_dfp, SM_BF_TRUNCATE, NULL) < 0) 2889 { 2890 MILTER_DF_ERROR("milter_replbody: sm_io truncate %s: %s"); 2891 return -1; 2892 } 2893 } 2894 else 2895 { 2896 int err; 2897 2898 # if NOFTRUNCATE 2899 /* XXX: Not much we can do except rewind it */ 2900 err = sm_io_error(e->e_dfp); 2901 (void) sm_io_flush(e->e_dfp, SM_TIME_DEFAULT); 2902 2903 /* 2904 ** Clear error if tried to fflush() 2905 ** a read-only file pointer and 2906 ** there wasn't a previous error. 2907 */ 2908 2909 if (err == 0) 2910 sm_io_clearerr(e->e_dfp); 2911 2912 /* errno is set implicitly by fseek() before return */ 2913 err = sm_io_seek(e->e_dfp, SM_TIME_DEFAULT, 2914 0, SEEK_SET); 2915 # else /* NOFTRUNCATE */ 2916 err = ftruncate(sm_io_getinfo(e->e_dfp, 2917 SM_IO_WHAT_FD, NULL), 2918 0); 2919 # endif /* NOFTRUNCATE */ 2920 if (err < 0) 2921 { 2922 MILTER_DF_ERROR("milter_replbody: sm_io ftruncate %s: %s"); 2923 return -1; 2924 } 2925 } 2926 2927 if (prevsize > e->e_msgsize) 2928 e->e_msgsize = 0; 2929 else 2930 e->e_msgsize -= prevsize; 2931 } 2932 2933 if (newfilter && MilterLogLevel > 8) 2934 sm_syslog(LOG_INFO, e->e_id, "Milter message: body replaced"); 2935 2936 if (response == NULL) 2937 { 2938 /* Flush the buffered '\r' */ 2939 if (prevchar == '\r') 2940 { 2941 (void) sm_io_putc(e->e_dfp, SM_TIME_DEFAULT, prevchar); 2942 e->e_msgsize++; 2943 } 2944 return 0; 2945 } 2946 2947 for (i = 0; i < rlen; i++) 2948 { 2949 /* Buffered char from last chunk */ 2950 if (i == 0 && prevchar == '\r') 2951 { 2952 /* Not CRLF, output prevchar */ 2953 if (response[i] != '\n') 2954 { 2955 (void) sm_io_putc(e->e_dfp, SM_TIME_DEFAULT, 2956 prevchar); 2957 e->e_msgsize++; 2958 } 2959 prevchar = '\0'; 2960 } 2961 2962 /* Turn CRLF into LF */ 2963 if (response[i] == '\r') 2964 { 2965 /* check if at end of chunk */ 2966 if (i + 1 < rlen) 2967 { 2968 /* If LF, strip CR */ 2969 if (response[i + 1] == '\n') 2970 i++; 2971 } 2972 else 2973 { 2974 /* check next chunk */ 2975 prevchar = '\r'; 2976 continue; 2977 } 2978 } 2979 (void) sm_io_putc(e->e_dfp, SM_TIME_DEFAULT, response[i]); 2980 e->e_msgsize++; 2981 } 2982 return 0; 2983 } 2984 2985 /* 2986 ** MTA callouts 2987 */ 2988 2989 /* 2990 ** MILTER_INIT -- open and negotiate with all of the filters 2991 ** 2992 ** Parameters: 2993 ** e -- current envelope. 2994 ** state -- return state from response. 2995 ** 2996 ** Returns: 2997 ** true iff at least one filter is active 2998 */ 2999 3000 /* ARGSUSED */ 3001 bool 3002 milter_init(e, state) 3003 ENVELOPE *e; 3004 char *state; 3005 { 3006 int i; 3007 3008 if (tTd(64, 10)) 3009 sm_dprintf("milter_init\n"); 3010 3011 *state = SMFIR_CONTINUE; 3012 if (InputFilters[0] == NULL) 3013 { 3014 if (MilterLogLevel > 10) 3015 sm_syslog(LOG_INFO, e->e_id, 3016 "Milter: no active filter"); 3017 return false; 3018 } 3019 3020 for (i = 0; InputFilters[i] != NULL; i++) 3021 { 3022 struct milter *m = InputFilters[i]; 3023 3024 m->mf_sock = milter_open(m, false, e); 3025 if (m->mf_state == SMFS_ERROR) 3026 { 3027 MILTER_CHECK_ERROR(continue); 3028 break; 3029 } 3030 3031 if (m->mf_sock < 0 || 3032 milter_negotiate(m, e) < 0 || 3033 m->mf_state == SMFS_ERROR) 3034 { 3035 if (tTd(64, 5)) 3036 sm_dprintf("milter_init(%s): failed to %s\n", 3037 m->mf_name, 3038 m->mf_sock < 0 ? "open" : 3039 "negotiate"); 3040 if (MilterLogLevel > 0) 3041 sm_syslog(LOG_ERR, e->e_id, 3042 "Milter (%s): init failed to %s", 3043 m->mf_name, 3044 m->mf_sock < 0 ? "open" : 3045 "negotiate"); 3046 3047 /* if negotation failure, close socket */ 3048 milter_error(m, e); 3049 MILTER_CHECK_ERROR(continue); 3050 } 3051 if (MilterLogLevel > 9) 3052 sm_syslog(LOG_INFO, e->e_id, 3053 "Milter (%s): init success to %s", 3054 m->mf_name, 3055 m->mf_sock < 0 ? "open" : "negotiate"); 3056 } 3057 3058 /* 3059 ** If something temp/perm failed with one of the filters, 3060 ** we won't be using any of them, so clear any existing 3061 ** connections. 3062 */ 3063 3064 if (*state != SMFIR_CONTINUE) 3065 milter_quit(e); 3066 3067 return true; 3068 } 3069 /* 3070 ** MILTER_CONNECT -- send connection info to milter filters 3071 ** 3072 ** Parameters: 3073 ** hostname -- hostname of remote machine. 3074 ** addr -- address of remote machine. 3075 ** e -- current envelope. 3076 ** state -- return state from response. 3077 ** 3078 ** Returns: 3079 ** response string (may be NULL) 3080 */ 3081 3082 char * 3083 milter_connect(hostname, addr, e, state) 3084 char *hostname; 3085 SOCKADDR addr; 3086 ENVELOPE *e; 3087 char *state; 3088 { 3089 char family; 3090 unsigned short port; 3091 char *buf, *bp; 3092 char *response; 3093 char *sockinfo = NULL; 3094 ssize_t s; 3095 # if NETINET6 3096 char buf6[INET6_ADDRSTRLEN]; 3097 # endif /* NETINET6 */ 3098 3099 if (tTd(64, 10)) 3100 sm_dprintf("milter_connect(%s)\n", hostname); 3101 if (MilterLogLevel > 9) 3102 sm_syslog(LOG_INFO, e->e_id, "Milter: connect to filters"); 3103 3104 /* gather data */ 3105 switch (addr.sa.sa_family) 3106 { 3107 # if NETUNIX 3108 case AF_UNIX: 3109 family = SMFIA_UNIX; 3110 port = htons(0); 3111 sockinfo = addr.sunix.sun_path; 3112 break; 3113 # endif /* NETUNIX */ 3114 3115 # if NETINET 3116 case AF_INET: 3117 family = SMFIA_INET; 3118 port = addr.sin.sin_port; 3119 sockinfo = (char *) inet_ntoa(addr.sin.sin_addr); 3120 break; 3121 # endif /* NETINET */ 3122 3123 # if NETINET6 3124 case AF_INET6: 3125 if (IN6_IS_ADDR_V4MAPPED(&addr.sin6.sin6_addr)) 3126 family = SMFIA_INET; 3127 else 3128 family = SMFIA_INET6; 3129 port = addr.sin6.sin6_port; 3130 sockinfo = anynet_ntop(&addr.sin6.sin6_addr, buf6, 3131 sizeof buf6); 3132 if (sockinfo == NULL) 3133 sockinfo = ""; 3134 break; 3135 # endif /* NETINET6 */ 3136 3137 default: 3138 family = SMFIA_UNKNOWN; 3139 break; 3140 } 3141 3142 s = strlen(hostname) + 1 + sizeof(family); 3143 if (family != SMFIA_UNKNOWN) 3144 s += sizeof(port) + strlen(sockinfo) + 1; 3145 3146 buf = (char *) xalloc(s); 3147 bp = buf; 3148 3149 /* put together data */ 3150 (void) memcpy(bp, hostname, strlen(hostname)); 3151 bp += strlen(hostname); 3152 *bp++ = '\0'; 3153 (void) memcpy(bp, &family, sizeof family); 3154 bp += sizeof family; 3155 if (family != SMFIA_UNKNOWN) 3156 { 3157 (void) memcpy(bp, &port, sizeof port); 3158 bp += sizeof port; 3159 3160 /* include trailing '\0' */ 3161 (void) memcpy(bp, sockinfo, strlen(sockinfo) + 1); 3162 } 3163 3164 response = milter_command(SMFIC_CONNECT, buf, s, 3165 MilterConnectMacros, e, state); 3166 sm_free(buf); /* XXX */ 3167 3168 /* 3169 ** If this message connection is done for, 3170 ** close the filters. 3171 */ 3172 3173 if (*state != SMFIR_CONTINUE) 3174 { 3175 if (MilterLogLevel > 9) 3176 sm_syslog(LOG_INFO, e->e_id, "Milter: connect, ending"); 3177 milter_quit(e); 3178 } 3179 else 3180 milter_per_connection_check(e); 3181 3182 /* 3183 ** SMFIR_REPLYCODE can't work with connect due to 3184 ** the requirements of SMTP. Therefore, ignore the 3185 ** reply code text but keep the state it would reflect. 3186 */ 3187 3188 if (*state == SMFIR_REPLYCODE) 3189 { 3190 if (response != NULL && 3191 *response == '4') 3192 *state = SMFIR_TEMPFAIL; 3193 else 3194 *state = SMFIR_REJECT; 3195 if (response != NULL) 3196 { 3197 sm_free(response); /* XXX */ 3198 response = NULL; 3199 } 3200 } 3201 return response; 3202 } 3203 /* 3204 ** MILTER_HELO -- send SMTP HELO/EHLO command info to milter filters 3205 ** 3206 ** Parameters: 3207 ** helo -- argument to SMTP HELO/EHLO command. 3208 ** e -- current envelope. 3209 ** state -- return state from response. 3210 ** 3211 ** Returns: 3212 ** response string (may be NULL) 3213 */ 3214 3215 char * 3216 milter_helo(helo, e, state) 3217 char *helo; 3218 ENVELOPE *e; 3219 char *state; 3220 { 3221 int i; 3222 char *response; 3223 3224 if (tTd(64, 10)) 3225 sm_dprintf("milter_helo(%s)\n", helo); 3226 3227 /* HELO/EHLO can come at any point */ 3228 for (i = 0; InputFilters[i] != NULL; i++) 3229 { 3230 struct milter *m = InputFilters[i]; 3231 3232 switch (m->mf_state) 3233 { 3234 case SMFS_INMSG: 3235 /* abort in message filters */ 3236 milter_abort_filter(m, e); 3237 /* FALLTHROUGH */ 3238 3239 case SMFS_DONE: 3240 /* reset done filters */ 3241 m->mf_state = SMFS_OPEN; 3242 break; 3243 } 3244 } 3245 3246 response = milter_command(SMFIC_HELO, helo, strlen(helo) + 1, 3247 MilterHeloMacros, e, state); 3248 milter_per_connection_check(e); 3249 return response; 3250 } 3251 /* 3252 ** MILTER_ENVFROM -- send SMTP MAIL command info to milter filters 3253 ** 3254 ** Parameters: 3255 ** args -- SMTP MAIL command args (args[0] == sender). 3256 ** e -- current envelope. 3257 ** state -- return state from response. 3258 ** 3259 ** Returns: 3260 ** response string (may be NULL) 3261 */ 3262 3263 char * 3264 milter_envfrom(args, e, state) 3265 char **args; 3266 ENVELOPE *e; 3267 char *state; 3268 { 3269 int i; 3270 char *buf, *bp; 3271 char *response; 3272 ssize_t s; 3273 3274 if (tTd(64, 10)) 3275 { 3276 sm_dprintf("milter_envfrom:"); 3277 for (i = 0; args[i] != NULL; i++) 3278 sm_dprintf(" %s", args[i]); 3279 sm_dprintf("\n"); 3280 } 3281 3282 /* sanity check */ 3283 if (args[0] == NULL) 3284 { 3285 *state = SMFIR_REJECT; 3286 if (MilterLogLevel > 10) 3287 sm_syslog(LOG_INFO, e->e_id, 3288 "Milter: reject, no sender"); 3289 return NULL; 3290 } 3291 3292 /* new message, so ... */ 3293 for (i = 0; InputFilters[i] != NULL; i++) 3294 { 3295 struct milter *m = InputFilters[i]; 3296 3297 switch (m->mf_state) 3298 { 3299 case SMFS_INMSG: 3300 /* abort in message filters */ 3301 milter_abort_filter(m, e); 3302 /* FALLTHROUGH */ 3303 3304 case SMFS_DONE: 3305 /* reset done filters */ 3306 m->mf_state = SMFS_OPEN; 3307 break; 3308 } 3309 } 3310 3311 /* put together data */ 3312 s = 0; 3313 for (i = 0; args[i] != NULL; i++) 3314 s += strlen(args[i]) + 1; 3315 3316 if (s < 0) 3317 { 3318 *state = SMFIR_TEMPFAIL; 3319 return NULL; 3320 } 3321 3322 buf = (char *) xalloc(s); 3323 bp = buf; 3324 for (i = 0; args[i] != NULL; i++) 3325 { 3326 (void) sm_strlcpy(bp, args[i], s - (bp - buf)); 3327 bp += strlen(bp) + 1; 3328 } 3329 3330 if (MilterLogLevel > 14) 3331 sm_syslog(LOG_INFO, e->e_id, "Milter: senders: %s", buf); 3332 3333 /* send it over */ 3334 response = milter_command(SMFIC_MAIL, buf, s, 3335 MilterEnvFromMacros, e, state); 3336 sm_free(buf); /* XXX */ 3337 3338 /* 3339 ** If filter rejects/discards a per message command, 3340 ** abort the other filters since we are done with the 3341 ** current message. 3342 */ 3343 3344 MILTER_CHECK_DONE_MSG(); 3345 if (MilterLogLevel > 10 && *state == SMFIR_REJECT) 3346 sm_syslog(LOG_INFO, e->e_id, "Milter: reject, senders"); 3347 return response; 3348 } 3349 /* 3350 ** MILTER_ENVRCPT -- send SMTP RCPT command info to milter filters 3351 ** 3352 ** Parameters: 3353 ** args -- SMTP MAIL command args (args[0] == recipient). 3354 ** e -- current envelope. 3355 ** state -- return state from response. 3356 ** 3357 ** Returns: 3358 ** response string (may be NULL) 3359 */ 3360 3361 char * 3362 milter_envrcpt(args, e, state) 3363 char **args; 3364 ENVELOPE *e; 3365 char *state; 3366 { 3367 int i; 3368 char *buf, *bp; 3369 char *response; 3370 ssize_t s; 3371 3372 if (tTd(64, 10)) 3373 { 3374 sm_dprintf("milter_envrcpt:"); 3375 for (i = 0; args[i] != NULL; i++) 3376 sm_dprintf(" %s", args[i]); 3377 sm_dprintf("\n"); 3378 } 3379 3380 /* sanity check */ 3381 if (args[0] == NULL) 3382 { 3383 *state = SMFIR_REJECT; 3384 if (MilterLogLevel > 10) 3385 sm_syslog(LOG_INFO, e->e_id, "Milter: reject, no rcpt"); 3386 return NULL; 3387 } 3388 3389 /* put together data */ 3390 s = 0; 3391 for (i = 0; args[i] != NULL; i++) 3392 s += strlen(args[i]) + 1; 3393 3394 if (s < 0) 3395 { 3396 *state = SMFIR_TEMPFAIL; 3397 return NULL; 3398 } 3399 3400 buf = (char *) xalloc(s); 3401 bp = buf; 3402 for (i = 0; args[i] != NULL; i++) 3403 { 3404 (void) sm_strlcpy(bp, args[i], s - (bp - buf)); 3405 bp += strlen(bp) + 1; 3406 } 3407 3408 if (MilterLogLevel > 14) 3409 sm_syslog(LOG_INFO, e->e_id, "Milter: rcpts: %s", buf); 3410 3411 /* send it over */ 3412 response = milter_command(SMFIC_RCPT, buf, s, 3413 MilterEnvRcptMacros, e, state); 3414 sm_free(buf); /* XXX */ 3415 return response; 3416 } 3417 /* 3418 ** MILTER_DATA -- send message headers/body and gather final message results 3419 ** 3420 ** Parameters: 3421 ** e -- current envelope. 3422 ** state -- return state from response. 3423 ** 3424 ** Returns: 3425 ** response string (may be NULL) 3426 ** 3427 ** Side effects: 3428 ** - Uses e->e_dfp for access to the body 3429 ** - Can call the various milter action routines to 3430 ** modify the envelope or message. 3431 */ 3432 3433 # define MILTER_CHECK_RESULTS() \ 3434 if (*state == SMFIR_ACCEPT || \ 3435 m->mf_state == SMFS_DONE || \ 3436 m->mf_state == SMFS_ERROR) \ 3437 { \ 3438 if (m->mf_state != SMFS_ERROR) \ 3439 m->mf_state = SMFS_DONE; \ 3440 continue; /* to next filter */ \ 3441 } \ 3442 if (*state != SMFIR_CONTINUE) \ 3443 { \ 3444 m->mf_state = SMFS_DONE; \ 3445 goto finishup; \ 3446 } 3447 3448 char * 3449 milter_data(e, state) 3450 ENVELOPE *e; 3451 char *state; 3452 { 3453 bool replbody = false; /* milter_replbody() called? */ 3454 bool replfailed = false; /* milter_replbody() failed? */ 3455 bool rewind = false; /* rewind data file? */ 3456 bool dfopen = false; /* data file open for writing? */ 3457 bool newfilter; /* reset on each new filter */ 3458 char rcmd; 3459 int i; 3460 int save_errno; 3461 char *response = NULL; 3462 time_t eomsent; 3463 ssize_t rlen; 3464 3465 if (tTd(64, 10)) 3466 sm_dprintf("milter_data\n"); 3467 3468 *state = SMFIR_CONTINUE; 3469 3470 /* 3471 ** XXX: Should actually send body chunks to each filter 3472 ** a chunk at a time instead of sending the whole body to 3473 ** each filter in turn. However, only if the filters don't 3474 ** change the body. 3475 */ 3476 3477 for (i = 0; InputFilters[i] != NULL; i++) 3478 { 3479 struct milter *m = InputFilters[i]; 3480 3481 if (*state != SMFIR_CONTINUE && 3482 *state != SMFIR_ACCEPT) 3483 { 3484 /* 3485 ** A previous filter has dealt with the message, 3486 ** safe to stop processing the filters. 3487 */ 3488 3489 break; 3490 } 3491 3492 /* Now reset state for later evaluation */ 3493 *state = SMFIR_CONTINUE; 3494 newfilter = true; 3495 3496 /* previous problem? */ 3497 if (m->mf_state == SMFS_ERROR) 3498 { 3499 MILTER_CHECK_ERROR(continue); 3500 break; 3501 } 3502 3503 /* sanity checks */ 3504 if (m->mf_sock < 0 || 3505 (m->mf_state != SMFS_OPEN && m->mf_state != SMFS_INMSG)) 3506 continue; 3507 3508 m->mf_state = SMFS_INMSG; 3509 3510 /* check if filter wants the headers */ 3511 if (!bitset(SMFIP_NOHDRS, m->mf_pflags)) 3512 { 3513 response = milter_headers(m, e, state); 3514 MILTER_CHECK_RESULTS(); 3515 } 3516 3517 /* check if filter wants EOH */ 3518 if (!bitset(SMFIP_NOEOH, m->mf_pflags)) 3519 { 3520 if (tTd(64, 10)) 3521 sm_dprintf("milter_data: eoh\n"); 3522 3523 /* send it over */ 3524 response = milter_send_command(m, SMFIC_EOH, NULL, 0, 3525 e, state); 3526 MILTER_CHECK_RESULTS(); 3527 } 3528 3529 /* check if filter wants the body */ 3530 if (!bitset(SMFIP_NOBODY, m->mf_pflags) && 3531 e->e_dfp != NULL) 3532 { 3533 rewind = true; 3534 response = milter_body(m, e, state); 3535 MILTER_CHECK_RESULTS(); 3536 } 3537 3538 /* send the final body chunk */ 3539 (void) milter_write(m, SMFIC_BODYEOB, NULL, 0, 3540 m->mf_timeout[SMFTO_WRITE], e); 3541 3542 /* Get time EOM sent for timeout */ 3543 eomsent = curtime(); 3544 3545 /* deal with the possibility of multiple responses */ 3546 while (*state == SMFIR_CONTINUE) 3547 { 3548 /* Check total timeout from EOM to final ACK/NAK */ 3549 if (m->mf_timeout[SMFTO_EOM] > 0 && 3550 curtime() - eomsent >= m->mf_timeout[SMFTO_EOM]) 3551 { 3552 if (tTd(64, 5)) 3553 sm_dprintf("milter_data(%s): EOM ACK/NAK timeout\n", 3554 m->mf_name); 3555 if (MilterLogLevel > 0) 3556 sm_syslog(LOG_ERR, e->e_id, 3557 "milter_data(%s): EOM ACK/NAK timeout", 3558 m->mf_name); 3559 milter_error(m, e); 3560 MILTER_CHECK_ERROR(break); 3561 break; 3562 } 3563 3564 response = milter_read(m, &rcmd, &rlen, 3565 m->mf_timeout[SMFTO_READ], e); 3566 if (m->mf_state == SMFS_ERROR) 3567 break; 3568 3569 if (tTd(64, 10)) 3570 sm_dprintf("milter_data(%s): state %c\n", 3571 m->mf_name, (char) rcmd); 3572 3573 switch (rcmd) 3574 { 3575 case SMFIR_REPLYCODE: 3576 MILTER_CHECK_REPLYCODE("554 5.7.1 Command rejected"); 3577 if (MilterLogLevel > 12) 3578 sm_syslog(LOG_INFO, e->e_id, "milter=%s, reject=%s", 3579 m->mf_name, response); 3580 *state = rcmd; 3581 m->mf_state = SMFS_DONE; 3582 break; 3583 3584 case SMFIR_REJECT: /* log msg at end of function */ 3585 if (MilterLogLevel > 12) 3586 sm_syslog(LOG_INFO, e->e_id, "milter=%s, reject", 3587 m->mf_name); 3588 *state = rcmd; 3589 m->mf_state = SMFS_DONE; 3590 break; 3591 3592 case SMFIR_DISCARD: 3593 if (MilterLogLevel > 12) 3594 sm_syslog(LOG_INFO, e->e_id, "milter=%s, discard", 3595 m->mf_name); 3596 *state = rcmd; 3597 m->mf_state = SMFS_DONE; 3598 break; 3599 3600 case SMFIR_TEMPFAIL: 3601 if (MilterLogLevel > 12) 3602 sm_syslog(LOG_INFO, e->e_id, "milter=%s, tempfail", 3603 m->mf_name); 3604 *state = rcmd; 3605 m->mf_state = SMFS_DONE; 3606 break; 3607 3608 case SMFIR_CONTINUE: 3609 case SMFIR_ACCEPT: 3610 /* this filter is done with message */ 3611 if (replfailed) 3612 *state = SMFIR_TEMPFAIL; 3613 else 3614 *state = SMFIR_ACCEPT; 3615 m->mf_state = SMFS_DONE; 3616 break; 3617 3618 case SMFIR_PROGRESS: 3619 break; 3620 3621 # if _FFR_QUARANTINE 3622 case SMFIR_QUARANTINE: 3623 if (!bitset(SMFIF_QUARANTINE, m->mf_fflags)) 3624 { 3625 if (MilterLogLevel > 9) 3626 sm_syslog(LOG_WARNING, e->e_id, 3627 "milter_data(%s): lied about quarantining, honoring request anyway", 3628 m->mf_name); 3629 } 3630 if (response == NULL) 3631 response = newstr(""); 3632 if (MilterLogLevel > 3) 3633 sm_syslog(LOG_INFO, e->e_id, 3634 "milter=%s, quarantine=%s", 3635 m->mf_name, response); 3636 e->e_quarmsg = sm_rpool_strdup_x(e->e_rpool, 3637 response); 3638 macdefine(&e->e_macro, A_PERM, 3639 macid("{quarantine}"), e->e_quarmsg); 3640 break; 3641 # endif /* _FFR_QUARANTINE */ 3642 3643 case SMFIR_ADDHEADER: 3644 if (!bitset(SMFIF_ADDHDRS, m->mf_fflags)) 3645 { 3646 if (MilterLogLevel > 9) 3647 sm_syslog(LOG_WARNING, e->e_id, 3648 "milter_data(%s): lied about adding headers, honoring request anyway", 3649 m->mf_name); 3650 } 3651 milter_addheader(response, rlen, e); 3652 break; 3653 3654 case SMFIR_CHGHEADER: 3655 if (!bitset(SMFIF_CHGHDRS, m->mf_fflags)) 3656 { 3657 if (MilterLogLevel > 9) 3658 sm_syslog(LOG_WARNING, e->e_id, 3659 "milter_data(%s): lied about changing headers, honoring request anyway", 3660 m->mf_name); 3661 } 3662 milter_changeheader(response, rlen, e); 3663 break; 3664 3665 case SMFIR_ADDRCPT: 3666 if (!bitset(SMFIF_ADDRCPT, m->mf_fflags)) 3667 { 3668 if (MilterLogLevel > 9) 3669 sm_syslog(LOG_WARNING, e->e_id, 3670 "milter_data(%s) lied about adding recipients, honoring request anyway", 3671 m->mf_name); 3672 } 3673 milter_addrcpt(response, rlen, e); 3674 break; 3675 3676 case SMFIR_DELRCPT: 3677 if (!bitset(SMFIF_DELRCPT, m->mf_fflags)) 3678 { 3679 if (MilterLogLevel > 9) 3680 sm_syslog(LOG_WARNING, e->e_id, 3681 "milter_data(%s): lied about removing recipients, honoring request anyway", 3682 m->mf_name); 3683 } 3684 milter_delrcpt(response, rlen, e); 3685 break; 3686 3687 case SMFIR_REPLBODY: 3688 if (!bitset(SMFIF_MODBODY, m->mf_fflags)) 3689 { 3690 if (MilterLogLevel > 0) 3691 sm_syslog(LOG_ERR, e->e_id, 3692 "milter_data(%s): lied about replacing body, rejecting request and tempfailing message", 3693 m->mf_name); 3694 replfailed = true; 3695 break; 3696 } 3697 3698 /* already failed in attempt */ 3699 if (replfailed) 3700 break; 3701 3702 if (!dfopen) 3703 { 3704 if (milter_reopen_df(e) < 0) 3705 { 3706 replfailed = true; 3707 break; 3708 } 3709 dfopen = true; 3710 rewind = true; 3711 } 3712 3713 if (milter_replbody(response, rlen, 3714 newfilter, e) < 0) 3715 replfailed = true; 3716 newfilter = false; 3717 replbody = true; 3718 break; 3719 3720 default: 3721 /* Invalid response to command */ 3722 if (MilterLogLevel > 0) 3723 sm_syslog(LOG_ERR, e->e_id, 3724 "milter_data(%s): returned bogus response %c", 3725 m->mf_name, rcmd); 3726 milter_error(m, e); 3727 break; 3728 } 3729 if (rcmd != SMFIR_REPLYCODE && response != NULL) 3730 { 3731 sm_free(response); /* XXX */ 3732 response = NULL; 3733 } 3734 3735 if (m->mf_state == SMFS_ERROR) 3736 break; 3737 } 3738 3739 if (replbody && !replfailed) 3740 { 3741 /* flush possible buffered character */ 3742 milter_replbody(NULL, 0, !replbody, e); 3743 replbody = false; 3744 } 3745 3746 if (m->mf_state == SMFS_ERROR) 3747 { 3748 MILTER_CHECK_ERROR(continue); 3749 goto finishup; 3750 } 3751 } 3752 3753 finishup: 3754 /* leave things in the expected state if we touched it */ 3755 if (replfailed) 3756 { 3757 if (*state == SMFIR_CONTINUE || 3758 *state == SMFIR_ACCEPT) 3759 { 3760 *state = SMFIR_TEMPFAIL; 3761 SM_FREE_CLR(response); 3762 } 3763 3764 if (dfopen) 3765 { 3766 (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT); 3767 e->e_dfp = NULL; 3768 e->e_flags &= ~EF_HAS_DF; 3769 dfopen = false; 3770 } 3771 rewind = false; 3772 } 3773 3774 if ((dfopen && milter_reset_df(e) < 0) || 3775 (rewind && bfrewind(e->e_dfp) < 0)) 3776 { 3777 save_errno = errno; 3778 ExitStat = EX_IOERR; 3779 3780 /* 3781 ** If filter told us to keep message but we had 3782 ** an error, we can't really keep it, tempfail it. 3783 */ 3784 3785 if (*state == SMFIR_CONTINUE || 3786 *state == SMFIR_ACCEPT) 3787 { 3788 *state = SMFIR_TEMPFAIL; 3789 SM_FREE_CLR(response); 3790 } 3791 3792 errno = save_errno; 3793 syserr("milter_data: %s/%cf%s: read error", 3794 qid_printqueue(e->e_qgrp, e->e_qdir), 3795 DATAFL_LETTER, e->e_id); 3796 } 3797 3798 MILTER_CHECK_DONE_MSG(); 3799 if (MilterLogLevel > 10 && *state == SMFIR_REJECT) 3800 sm_syslog(LOG_INFO, e->e_id, "Milter: reject, data"); 3801 return response; 3802 } 3803 /* 3804 ** MILTER_QUIT -- informs the filter(s) we are done and closes connection(s) 3805 ** 3806 ** Parameters: 3807 ** e -- current envelope. 3808 ** 3809 ** Returns: 3810 ** none 3811 */ 3812 3813 void 3814 milter_quit(e) 3815 ENVELOPE *e; 3816 { 3817 int i; 3818 3819 if (tTd(64, 10)) 3820 sm_dprintf("milter_quit(%s)\n", e->e_id); 3821 3822 for (i = 0; InputFilters[i] != NULL; i++) 3823 milter_quit_filter(InputFilters[i], e); 3824 } 3825 /* 3826 ** MILTER_ABORT -- informs the filter(s) that we are aborting current message 3827 ** 3828 ** Parameters: 3829 ** e -- current envelope. 3830 ** 3831 ** Returns: 3832 ** none 3833 */ 3834 3835 void 3836 milter_abort(e) 3837 ENVELOPE *e; 3838 { 3839 int i; 3840 3841 if (tTd(64, 10)) 3842 sm_dprintf("milter_abort\n"); 3843 3844 for (i = 0; InputFilters[i] != NULL; i++) 3845 { 3846 struct milter *m = InputFilters[i]; 3847 3848 /* sanity checks */ 3849 if (m->mf_sock < 0 || m->mf_state != SMFS_INMSG) 3850 continue; 3851 3852 milter_abort_filter(m, e); 3853 } 3854 } 3855 #endif /* MILTER */ 3856