contrib/sendmail/src/milter.c

   1 /*
   2  * Copyright (c) 1999-2006 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 8.269 2007/06/06 17:26:12 ca Exp $")
  14
  15 #if MILTER
  16 # include <sm/sendmail.h>
  17 # include <libmilter/mfapi.h>
  18 # include <libmilter/mfdef.h>
  19
  20 # include <errno.h>
  21 # include <sm/time.h>
  22 # include <sys/uio.h>
  23
  24 # if NETINET || NETINET6
  25 #  include <arpa/inet.h>
  26 #  if MILTER_NO_NAGLE
  27 #   include <netinet/tcp.h>
  28 #  endif /* MILTER_NO_NAGLE */
  29 # endif /* NETINET || NETINET6 */
  30
  31 # include <sm/fdset.h>
  32
  33 static void     milter_connect_timeout __P((int));
  34 static void     milter_error __P((struct milter *, ENVELOPE *));
  35 static int      milter_open __P((struct milter *, bool, ENVELOPE *));
  36 static void     milter_parse_timeouts __P((char *, struct milter *));
  37 static char     *milter_sysread __P((struct milter *, char *, ssize_t, time_t,
  38                         ENVELOPE *, const char *));
  39 static char     *milter_read __P((struct milter *, char *, ssize_t *, time_t,
  40                         ENVELOPE *, const char *));
  41 static char     *milter_write __P((struct milter *, int, char *, ssize_t,
  42                         time_t, ENVELOPE *, const char *));
  43 static char     *milter_send_command __P((struct milter *, int, void *,
  44                         ssize_t, ENVELOPE *, char *, const char *));
  45 static char     *milter_command __P((int, void *, ssize_t, char **,
  46                         ENVELOPE *, char *, const char *, bool));
  47 static char     *milter_body __P((struct milter *, ENVELOPE *, char *));
  48 static int      milter_reopen_df __P((ENVELOPE *));
  49 static int      milter_reset_df __P((ENVELOPE *));
  50 static void     milter_quit_filter __P((struct milter *, ENVELOPE *));
  51 static void     milter_abort_filter __P((struct milter *, ENVELOPE *));
  52 static void     milter_send_macros __P((struct milter *, char **, int,
  53                         ENVELOPE *));
  54 static int      milter_negotiate __P((struct milter *, ENVELOPE *,
  55                         milters_T *));
  56 static void     milter_per_connection_check __P((ENVELOPE *));
  57 static char     *milter_headers __P((struct milter *, ENVELOPE *, char *));
  58 static void     milter_addheader __P((struct milter *, char *, ssize_t,
  59                         ENVELOPE *));
  60 static void     milter_insheader __P((struct milter *, char *, ssize_t,
  61                         ENVELOPE *));
  62 static void     milter_changeheader __P((struct milter *, char *, ssize_t,
  63                         ENVELOPE *));
  64 static void     milter_chgfrom __P((char *, ssize_t, ENVELOPE *));
  65 static void     milter_addrcpt __P((char *, ssize_t, ENVELOPE *));
  66 static void     milter_addrcpt_par __P((char *, ssize_t, ENVELOPE *));
  67 static void     milter_delrcpt __P((char *, ssize_t, ENVELOPE *));
  68 static int      milter_replbody __P((char *, ssize_t, bool, ENVELOPE *));
  69 static int      milter_set_macros __P((char *, char **, char *, int));
  70
  71
  72 /* milter states */
  73 # define SMFS_CLOSED            'C'     /* closed for all further actions */
  74 # define SMFS_OPEN              'O'     /* connected to remote milter filter */
  75 # define SMFS_INMSG             'M'     /* currently servicing a message */
  76 # define SMFS_DONE              'D'     /* done with current message */
  77 # define SMFS_CLOSABLE          'Q'     /* done with current connection */
  78 # define SMFS_ERROR             'E'     /* error state */
  79 # define SMFS_READY             'R'     /* ready for action */
  80 # define SMFS_SKIP              'S'     /* skip body */
  81
  82 static char *MilterConnectMacros[MAXFILTERMACROS + 1];
  83 static char *MilterHeloMacros[MAXFILTERMACROS + 1];
  84 static char *MilterEnvFromMacros[MAXFILTERMACROS + 1];
  85 static char *MilterEnvRcptMacros[MAXFILTERMACROS + 1];
  86 static char *MilterDataMacros[MAXFILTERMACROS + 1];
  87 static char *MilterEOMMacros[MAXFILTERMACROS + 1];
  88 static char *MilterEOHMacros[MAXFILTERMACROS + 1];
  89 static size_t MilterMaxDataSize = MILTER_MAX_DATA_SIZE;
  90
  91 # define MILTER_CHECK_DONE_MSG() \
  92         if (*state == SMFIR_REPLYCODE || \
  93             *state == SMFIR_REJECT || \
  94             *state == SMFIR_DISCARD || \
  95             *state == SMFIR_TEMPFAIL) \
  96         { \
  97                 /* Abort the filters to let them know we are done with msg */ \
  98                 milter_abort(e); \
  99         }
 100
 101 # define MILTER_CHECK_ERROR(initial, action) \
 102         if (!initial && tTd(71, 100)) \
 103         { \
 104                 if (e->e_quarmsg == NULL) \
 105                 { \
 106                         e->e_quarmsg = sm_rpool_strdup_x(e->e_rpool, \
 107                                                          "filter failure"); \
 108                         macdefine(&e->e_macro, A_PERM, macid("{quarantine}"), \
 109                                   e->e_quarmsg); \
 110                 } \
 111         } \
 112         else if (tTd(71, 101)) \
 113         { \
 114                 if (e->e_quarmsg == NULL) \
 115                 { \
 116                         e->e_quarmsg = sm_rpool_strdup_x(e->e_rpool, \
 117                                                          "filter failure"); \
 118                         macdefine(&e->e_macro, A_PERM, macid("{quarantine}"), \
 119                                   e->e_quarmsg); \
 120                 } \
 121         } \
 122         else if (bitnset(SMF_TEMPFAIL, m->mf_flags)) \
 123                 *state = SMFIR_TEMPFAIL; \
 124         else if (bitnset(SMF_TEMPDROP, m->mf_flags)) \
 125                 *state = SMFIR_SHUTDOWN; \
 126         else if (bitnset(SMF_REJECT, m->mf_flags)) \
 127                 *state = SMFIR_REJECT; \
 128         else \
 129                 action;
 130
 131 # define MILTER_CHECK_REPLYCODE(default) \
 132         if (response == NULL || \
 133             strlen(response) + 1 != (size_t) rlen || \
 134             rlen < 3 || \
 135             (response[0] != '4' && response[0] != '5') || \
 136             !isascii(response[1]) || !isdigit(response[1]) || \
 137             !isascii(response[2]) || !isdigit(response[2])) \
 138         { \
 139                 if (response != NULL) \
 140                         sm_free(response); /* XXX */ \
 141                 response = newstr(default); \
 142         } \
 143         else \
 144         { \
 145                 char *ptr = response; \
 146  \
 147                 /* Check for unprotected %'s in the string */ \
 148                 while (*ptr != '\0') \
 149                 { \
 150                         if (*ptr == '%' && *++ptr != '%') \
 151                         { \
 152                                 sm_free(response); /* XXX */ \
 153                                 response = newstr(default); \
 154                                 break; \
 155                         } \
 156                         ptr++; \
 157                 } \
 158         }
 159
 160 # define MILTER_DF_ERROR(msg) \
 161 { \
 162         int save_errno = errno; \
 163  \
 164         if (tTd(64, 5)) \
 165         { \
 166                 sm_dprintf(msg, dfname, sm_errstring(save_errno)); \
 167                 sm_dprintf("\n"); \
 168         } \
 169         if (MilterLogLevel > 0) \
 170                 sm_syslog(LOG_ERR, e->e_id, msg, dfname, sm_errstring(save_errno)); \
 171         if (SuperSafe == SAFE_REALLY) \
 172         { \
 173                 if (e->e_dfp != NULL) \
 174                 { \
 175                         (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT); \
 176                         e->e_dfp = NULL; \
 177                 } \
 178                 e->e_flags &= ~EF_HAS_DF; \
 179         } \
 180         errno = save_errno; \
 181 }
 182
 183 /*
 184 **  MILTER_TIMEOUT -- make sure socket is ready in time
 185 **
 186 **      Parameters:
 187 **              routine -- routine name for debug/logging
 188 **              secs -- number of seconds in timeout
 189 **              write -- waiting to read or write?
 190 **              started -- whether this is part of a previous sequence
 191 **
 192 **      Assumes 'm' is a milter structure for the current socket.
 193 */
 194
 195 # define MILTER_TIMEOUT(routine, secs, write, started, function) \
 196 { \
 197         int ret; \
 198         int save_errno; \
 199         fd_set fds; \
 200         struct timeval tv; \
 201  \
 202         if (SM_FD_SETSIZE > 0 && m->mf_sock >= SM_FD_SETSIZE) \
 203         { \
 204                 if (tTd(64, 5)) \
 205                         sm_dprintf("milter_%s(%s): socket %d is larger than FD_SETSIZE %d\n", \
 206                                    (routine), m->mf_name, m->mf_sock, \
 207                                    SM_FD_SETSIZE); \
 208                 if (MilterLogLevel > 0) \
 209                         sm_syslog(LOG_ERR, e->e_id, \
 210                                   "Milter (%s): socket(%s) %d is larger than FD_SETSIZE %d", \
 211                                   m->mf_name, (routine), m->mf_sock, \
 212                                   SM_FD_SETSIZE); \
 213                 milter_error(m, e); \
 214                 return NULL; \
 215         } \
 216  \
 217         do \
 218         { \
 219                 FD_ZERO(&fds); \
 220                 SM_FD_SET(m->mf_sock, &fds); \
 221                 tv.tv_sec = (secs); \
 222                 tv.tv_usec = 0; \
 223                 ret = select(m->mf_sock + 1, \
 224                              (write) ? NULL : &fds, \
 225                              (write) ? &fds : NULL, \
 226                              NULL, &tv); \
 227         } while (ret < 0 && errno == EINTR); \
 228  \
 229         switch (ret) \
 230         { \
 231           case 0: \
 232                 if (tTd(64, 5)) \
 233                         sm_dprintf("milter_%s(%s): timeout, where=%s\n", \
 234                                 (routine), m->mf_name, (function)); \
 235                 if (MilterLogLevel > 0) \
 236                         sm_syslog(LOG_ERR, e->e_id, \
 237                                   "Milter (%s): timeout %s data %s, where=%s", \
 238                                   m->mf_name, \
 239                                   started ? "during" : "before", \
 240                                   (routine), (function)); \
 241                 milter_error(m, e); \
 242                 return NULL; \
 243  \
 244           case -1: \
 245                 save_errno = errno; \
 246                 if (tTd(64, 5)) \
 247                         sm_dprintf("milter_%s(%s): select: %s\n", (routine), \
 248                                    m->mf_name, sm_errstring(save_errno)); \
 249                 if (MilterLogLevel > 0) \
 250                 { \
 251                         sm_syslog(LOG_ERR, e->e_id, \
 252                                   "Milter (%s): select(%s): %s", \
 253                                   m->mf_name, (routine), \
 254                                   sm_errstring(save_errno)); \
 255                 } \
 256                 milter_error(m, e); \
 257                 return NULL; \
 258  \
 259           default: \
 260                 if (SM_FD_ISSET(m->mf_sock, &fds)) \
 261                         break; \
 262                 if (tTd(64, 5)) \
 263                         sm_dprintf("milter_%s(%s): socket not ready\n", \
 264                                 (routine), m->mf_name); \
 265                 if (MilterLogLevel > 0) \
 266                 { \
 267                         sm_syslog(LOG_ERR, e->e_id, \
 268                                   "Milter (%s): socket(%s) not ready", \
 269                                   m->mf_name, (routine)); \
 270                 } \
 271                 milter_error(m, e); \
 272                 return NULL; \
 273         } \
 274 }
 275
 276 /*
 277 **  Low level functions
 278 */
 279
 280 /*
 281 **  MILTER_READ -- read from a remote milter filter
 282 **
 283 **      Parameters:
 284 **              m -- milter to read from.
 285 **              cmd -- return param for command read.
 286 **              rlen -- return length of response string.
 287 **              to -- timeout in seconds.
 288 **              e -- current envelope.
 289 **
 290 **      Returns:
 291 **              response string (may be NULL)
 292 */
 293
 294 static char *
 295 milter_sysread(m, buf, sz, to, e, where)
 296         struct milter *m;
 297         char *buf;
 298         ssize_t sz;
 299         time_t to;
 300         ENVELOPE *e;
 301         const char *where;
 302 {
 303         time_t readstart = 0;
 304         ssize_t len, curl;
 305         bool started = false;
 306
 307         curl = 0;
 308
 309         if (to > 0)
 310                 readstart = curtime();
 311
 312         for (;;)
 313         {
 314                 if (to > 0)
 315                 {
 316                         time_t now;
 317
 318                         now = curtime();
 319                         if (now - readstart >= to)
 320                         {
 321                                 if (tTd(64, 5))
 322                                         sm_dprintf("milter_sys_read (%s): timeout %s data read in %s",
 323                                                   m->mf_name,
 324                                                   started ? "during" : "before",
 325                                                   where);
 326                                 if (MilterLogLevel > 0)
 327                                         sm_syslog(LOG_ERR, e->e_id,
 328                                                   "Milter (%s): timeout %s data read in %s",
 329                                                   m->mf_name,
 330                                                   started ? "during" : "before",
 331                                                   where);
 332                                 milter_error(m, e);
 333                                 return NULL;
 334                         }
 335                         to -= now - readstart;
 336                         readstart = now;
 337                         MILTER_TIMEOUT("read", to, false, started, where);
 338                 }
 339
 340                 len = read(m->mf_sock, buf + curl, sz - curl);
 341
 342                 if (len < 0)
 343                 {
 344                         int save_errno = errno;
 345
 346                         if (tTd(64, 5))
 347                                 sm_dprintf("milter_sys_read(%s): read returned %ld: %s\n",
 348                                         m->mf_name, (long) len,
 349                                         sm_errstring(save_errno));
 350                         if (MilterLogLevel > 0)
 351                                 sm_syslog(LOG_ERR, e->e_id,
 352                                           "Milter (%s): read returned %ld: %s",
 353                                           m->mf_name, (long) len,
 354                                           sm_errstring(save_errno));
 355                         milter_error(m, e);
 356                         return NULL;
 357                 }
 358
 359                 started = true;
 360                 curl += len;
 361                 if (len == 0 || curl >= sz)
 362                         break;
 363
 364         }
 365
 366         if (curl != sz)
 367         {
 368                 if (tTd(64, 5))
 369                         sm_dprintf("milter_sys_read(%s): cmd read returned %ld, expecting %ld\n",
 370                                 m->mf_name, (long) curl, (long) sz);
 371                 if (MilterLogLevel > 0)
 372                         sm_syslog(LOG_ERR, e->e_id,
 373                                   "milter_sys_read(%s): cmd read returned %ld, expecting %ld",
 374                                   m->mf_name, (long) curl, (long) sz);
 375                 milter_error(m, e);
 376                 return NULL;
 377         }
 378         return buf;
 379 }
 380
 381 static char *
 382 milter_read(m, cmd, rlen, to, e, where)
 383         struct milter *m;
 384         char *cmd;
 385         ssize_t *rlen;
 386         time_t to;
 387         ENVELOPE *e;
 388         const char *where;
 389 {
 390         time_t readstart = 0;
 391         ssize_t expl;
 392         mi_int32 i;
 393 # if MILTER_NO_NAGLE && defined(TCP_CORK)
 394         int cork = 0;
 395 # endif /* MILTER_NO_NAGLE && defined(TCP_CORK) */
 396         char *buf;
 397         char data[MILTER_LEN_BYTES + 1];
 398
 399         if (m->mf_sock < 0)
 400         {
 401                 if (MilterLogLevel > 0)
 402                         sm_syslog(LOG_ERR, e->e_id,
 403                                   "milter_read(%s): socket closed, where=%s",
 404                                   m->mf_name, where);
 405                 milter_error(m, e);
 406                 return NULL;
 407         }
 408
 409         *rlen = 0;
 410         *cmd = '\0';
 411
 412         if (to > 0)
 413                 readstart = curtime();
 414
 415 # if MILTER_NO_NAGLE && defined(TCP_CORK)
 416         setsockopt(m->mf_sock, IPPROTO_TCP, TCP_CORK, (char *)&cork,
 417                    sizeof(cork));
 418 # endif /* MILTER_NO_NAGLE && defined(TCP_CORK) */
 419
 420         if (milter_sysread(m, data, sizeof(data), to, e, where) == NULL)
 421                 return NULL;
 422
 423 # if MILTER_NO_NAGLE && defined(TCP_CORK)
 424         cork = 1;
 425         setsockopt(m->mf_sock, IPPROTO_TCP, TCP_CORK, (char *)&cork,
 426                    sizeof(cork));
 427 # endif /* MILTER_NO_NAGLE && defined(TCP_CORK) */
 428
 429         /* reset timeout */
 430         if (to > 0)
 431         {
 432                 time_t now;
 433
 434                 now = curtime();
 435                 if (now - readstart >= to)
 436                 {
 437                         if (tTd(64, 5))
 438                                 sm_dprintf("milter_read(%s): timeout before data read, where=%s\n",
 439                                         m->mf_name, where);
 440                         if (MilterLogLevel > 0)
 441                                 sm_syslog(LOG_ERR, e->e_id,
 442                                           "Milter read(%s): timeout before data read, where=%s",
 443                                           m->mf_name, where);
 444                         milter_error(m, e);
 445                         return NULL;
 446                 }
 447                 to -= now - readstart;
 448         }
 449
 450         *cmd = data[MILTER_LEN_BYTES];
 451         data[MILTER_LEN_BYTES] = '\0';
 452         (void) memcpy(&i, data, MILTER_LEN_BYTES);
 453         expl = ntohl(i) - 1;
 454
 455         if (tTd(64, 25))
 456                 sm_dprintf("milter_read(%s): expecting %ld bytes\n",
 457                         m->mf_name, (long) expl);
 458
 459         if (expl < 0)
 460         {
 461                 if (tTd(64, 5))
 462                         sm_dprintf("milter_read(%s): read size %ld out of range, where=%s\n",
 463                                 m->mf_name, (long) expl, where);
 464                 if (MilterLogLevel > 0)
 465                         sm_syslog(LOG_ERR, e->e_id,
 466                                   "milter_read(%s): read size %ld out of range, where=%s",
 467                                   m->mf_name, (long) expl, where);
 468                 milter_error(m, e);
 469                 return NULL;
 470         }
 471
 472         if (expl == 0)
 473                 return NULL;
 474
 475         buf = (char *) xalloc(expl);
 476
 477         if (milter_sysread(m, buf, expl, to, e, where) == NULL)
 478         {
 479                 sm_free(buf); /* XXX */
 480                 return NULL;
 481         }
 482
 483         if (tTd(64, 50))
 484                 sm_dprintf("milter_read(%s): Returning %*s\n",
 485                         m->mf_name, (int) expl, buf);
 486         *rlen = expl;
 487         return buf;
 488 }
 489
 490 /*
 491 **  MILTER_WRITE -- write to a remote milter filter
 492 **
 493 **      Parameters:
 494 **              m -- milter to read from.
 495 **              cmd -- command to send.
 496 **              buf -- optional command data.
 497 **              len -- length of buf.
 498 **              to -- timeout in seconds.
 499 **              e -- current envelope.
 500 **
 501 **      Returns:
 502 **              buf if successful, NULL otherwise
 503 **              Not actually used anywhere but function prototype
 504 **                      must match milter_read()
 505 */
 506
 507 static char *
 508 milter_write(m, cmd, buf, len, to, e, where)
 509         struct milter *m;
 510         int cmd;
 511         char *buf;
 512         ssize_t len;
 513         time_t to;
 514         ENVELOPE *e;
 515         const char *where;
 516 {
 517         time_t writestart = (time_t) 0;
 518         ssize_t sl, i;
 519         int num_vectors;
 520         mi_int32 nl;
 521         char command = (char) cmd;
 522         char data[MILTER_LEN_BYTES + 1];
 523         bool started = false;
 524         struct iovec vector[2];
 525
 526         /*
 527         **  At most two buffers will be written, though
 528         **  only one may actually be used (see num_vectors).
 529         **  The first is the size/command and the second is the command data.
 530         */
 531
 532         if (len < 0 || len > MilterMaxDataSize)
 533         {
 534                 if (tTd(64, 5))
 535                         sm_dprintf("milter_write(%s): length %ld out of range\n",
 536                                 m->mf_name, (long) len);
 537                 if (MilterLogLevel > 0)
 538                         sm_syslog(LOG_ERR, e->e_id,
 539                                   "milter_write(%s): length %ld out of range",
 540                                   m->mf_name, (long) len);
 541                 milter_error(m, e);
 542                 return NULL;
 543         }
 544         if (m->mf_sock < 0)
 545         {
 546                 if (MilterLogLevel > 0)
 547                         sm_syslog(LOG_ERR, e->e_id,
 548                                   "milter_write(%s): socket closed",
 549                                   m->mf_name);
 550                 milter_error(m, e);
 551                 return NULL;
 552         }
 553
 554         if (tTd(64, 20))
 555                 sm_dprintf("milter_write(%s): cmd %c, len %ld\n",
 556                            m->mf_name, command, (long) len);
 557
 558         nl = htonl(len + 1);    /* add 1 for the command char */
 559         (void) memcpy(data, (char *) &nl, MILTER_LEN_BYTES);
 560         data[MILTER_LEN_BYTES] = command;
 561         sl = MILTER_LEN_BYTES + 1;
 562
 563         /* set up the vector for the size / command */
 564         vector[0].iov_base = (void *) data;
 565         vector[0].iov_len  = sl;
 566
 567         /*
 568         **  Determine if there is command data.  If so, there will be two
 569         **  vectors.  If not, there will be only one.  The vectors are set
 570         **  up here and 'num_vectors' and 'sl' are set appropriately.
 571         */
 572
 573         /* NOTE:  len<0 has already been checked for.  Pedantic */
 574         if (len <= 0 || buf == NULL)
 575         {
 576                 /* There is no command data -- only a size / command data */
 577                 num_vectors = 1;
 578         }
 579         else
 580         {
 581                 /*
 582                 **  There is both size / command and command data.
 583                 **  Set up the vector for the command data.
 584                 */
 585
 586                 num_vectors = 2;
 587                 sl += len;
 588                 vector[1].iov_base = (void *) buf;
 589                 vector[1].iov_len  = len;
 590
 591                 if (tTd(64, 50))
 592                         sm_dprintf("milter_write(%s): Sending %*s\n",
 593                                    m->mf_name, (int) len, buf);
 594         }
 595
 596         if (to > 0)
 597         {
 598                 writestart = curtime();
 599                 MILTER_TIMEOUT("write", to, true, started, where);
 600         }
 601
 602         /* write the vector(s) */
 603         i = writev(m->mf_sock, vector, num_vectors);
 604         if (i != sl)
 605         {
 606                 int save_errno = errno;
 607
 608                 if (tTd(64, 5))
 609                         sm_dprintf("milter_write(%s): write(%c) returned %ld, expected %ld: %s\n",
 610                                    m->mf_name, command, (long) i, (long) sl,
 611                                    sm_errstring(save_errno));
 612                 if (MilterLogLevel > 0)
 613                         sm_syslog(LOG_ERR, e->e_id,
 614                                   "Milter (%s): write(%c) returned %ld, expected %ld: %s",
 615                                   m->mf_name, command, (long) i, (long) sl,
 616                                   sm_errstring(save_errno));
 617                 milter_error(m, e);
 618                 return NULL;
 619         }
 620         return buf;
 621 }
 622
 623 /*
 624 **  Utility functions
 625 */
 626
 627 /*
 628 **  MILTER_OPEN -- connect to remote milter filter
 629 **
 630 **      Parameters:
 631 **              m -- milter to connect to.
 632 **              parseonly -- parse but don't connect.
 633 **              e -- current envelope.
 634 **
 635 **      Returns:
 636 **              connected socket if successful && !parseonly,
 637 **              0 upon parse success if parseonly,
 638 **              -1 otherwise.
 639 */
 640
 641 static jmp_buf  MilterConnectTimeout;
 642
 643 static int
 644 milter_open(m, parseonly, e)
 645         struct milter *m;
 646         bool parseonly;
 647         ENVELOPE *e;
 648 {
 649         int sock = 0;
 650         SOCKADDR_LEN_T addrlen = 0;
 651         int addrno = 0;
 652         int save_errno;
 653         char *p;
 654         char *colon;
 655         char *at;
 656         struct hostent *hp = NULL;
 657         SOCKADDR addr;
 658
 659         if (m->mf_conn == NULL || m->mf_conn[0] == '\0')
 660         {
 661                 if (tTd(64, 5))
 662                         sm_dprintf("X%s: empty or missing socket information\n",
 663                                    m->mf_name);
 664                 if (parseonly)
 665                         syserr("X%s: empty or missing socket information",
 666                                m->mf_name);
 667                 else if (MilterLogLevel > 0)
 668                         sm_syslog(LOG_ERR, e->e_id,
 669                                   "Milter (%s): empty or missing socket information",
 670                                   m->mf_name);
 671                 milter_error(m, e);
 672                 return -1;
 673         }
 674
 675         /* protocol:filename or protocol:port@host */
 676         memset(&addr, '\0', sizeof(addr));
 677         p = m->mf_conn;
 678         colon = strchr(p, ':');
 679         if (colon != NULL)
 680         {
 681                 *colon = '\0';
 682
 683                 if (*p == '\0')
 684                 {
 685 # if NETUNIX
 686                         /* default to AF_UNIX */
 687                         addr.sa.sa_family = AF_UNIX;
 688 # else /* NETUNIX */
 689 #  if NETINET
 690                         /* default to AF_INET */
 691                         addr.sa.sa_family = AF_INET;
 692 #  else /* NETINET */
 693 #   if NETINET6
 694                         /* default to AF_INET6 */
 695                         addr.sa.sa_family = AF_INET6;
 696 #   else /* NETINET6 */
 697                         /* no protocols available */
 698                         if (MilterLogLevel > 0)
 699                                 sm_syslog(LOG_ERR, e->e_id,
 700                                           "Milter (%s): no valid socket protocols available",
 701                                           m->mf_name);
 702                         milter_error(m, e);
 703                         return -1;
 704 #   endif /* NETINET6 */
 705 #  endif /* NETINET */
 706 # endif /* NETUNIX */
 707                 }
 708 # if NETUNIX
 709                 else if (sm_strcasecmp(p, "unix") == 0 ||
 710                          sm_strcasecmp(p, "local") == 0)
 711                         addr.sa.sa_family = AF_UNIX;
 712 # endif /* NETUNIX */
 713 # if NETINET
 714                 else if (sm_strcasecmp(p, "inet") == 0)
 715                         addr.sa.sa_family = AF_INET;
 716 # endif /* NETINET */
 717 # if NETINET6
 718                 else if (sm_strcasecmp(p, "inet6") == 0)
 719                         addr.sa.sa_family = AF_INET6;
 720 # endif /* NETINET6 */
 721                 else
 722                 {
 723 # ifdef EPROTONOSUPPORT
 724                         errno = EPROTONOSUPPORT;
 725 # else /* EPROTONOSUPPORT */
 726                         errno = EINVAL;
 727 # endif /* EPROTONOSUPPORT */
 728                         if (tTd(64, 5))
 729                                 sm_dprintf("X%s: unknown socket type %s\n",
 730                                         m->mf_name, p);
 731                         if (parseonly)
 732                                 syserr("X%s: unknown socket type %s",
 733                                        m->mf_name, p);
 734                         else if (MilterLogLevel > 0)
 735                                 sm_syslog(LOG_ERR, e->e_id,
 736                                           "Milter (%s): unknown socket type %s",
 737                                           m->mf_name, p);
 738                         milter_error(m, e);
 739                         return -1;
 740                 }
 741                 *colon++ = ':';
 742         }
 743         else
 744         {
 745                 /* default to AF_UNIX */
 746                 addr.sa.sa_family = AF_UNIX;
 747                 colon = p;
 748         }
 749
 750 # if NETUNIX
 751         if (addr.sa.sa_family == AF_UNIX)
 752         {
 753                 long sff = SFF_SAFEDIRPATH|SFF_OPENASROOT|SFF_NOLINK|SFF_EXECOK;
 754
 755                 at = colon;
 756                 if (strlen(colon) >= sizeof(addr.sunix.sun_path))
 757                 {
 758                         if (tTd(64, 5))
 759                                 sm_dprintf("X%s: local socket name %s too long\n",
 760                                         m->mf_name, colon);
 761                         errno = EINVAL;
 762                         if (parseonly)
 763                                 syserr("X%s: local socket name %s too long",
 764                                        m->mf_name, colon);
 765                         else if (MilterLogLevel > 0)
 766                                 sm_syslog(LOG_ERR, e->e_id,
 767                                           "Milter (%s): local socket name %s too long",
 768                                           m->mf_name, colon);
 769                         milter_error(m, e);
 770                         return -1;
 771                 }
 772                 errno = safefile(colon, RunAsUid, RunAsGid, RunAsUserName, sff,
 773                                  S_IRUSR|S_IWUSR, NULL);
 774
 775                 /* if just parsing .cf file, socket doesn't need to exist */
 776                 if (parseonly && errno == ENOENT)
 777                 {
 778                         if (OpMode == MD_DAEMON ||
 779                             OpMode == MD_FGDAEMON)
 780                                 (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
 781                                                      "WARNING: X%s: local socket name %s missing\n",
 782                                                      m->mf_name, colon);
 783                 }
 784                 else if (errno != 0)
 785                 {
 786                         /* if not safe, don't create */
 787                         save_errno = errno;
 788                         if (tTd(64, 5))
 789                                 sm_dprintf("X%s: local socket name %s unsafe\n",
 790                                         m->mf_name, colon);
 791                         errno = save_errno;
 792                         if (parseonly)
 793                         {
 794                                 if (OpMode == MD_DAEMON ||
 795                                     OpMode == MD_FGDAEMON ||
 796                                     OpMode == MD_SMTP)
 797                                         syserr("X%s: local socket name %s unsafe",
 798                                                m->mf_name, colon);
 799                         }
 800                         else if (MilterLogLevel > 0)
 801                                 sm_syslog(LOG_ERR, e->e_id,
 802                                           "Milter (%s): local socket name %s unsafe",
 803                                           m->mf_name, colon);
 804                         milter_error(m, e);
 805                         return -1;
 806                 }
 807
 808                 (void) sm_strlcpy(addr.sunix.sun_path, colon,
 809                                sizeof(addr.sunix.sun_path));
 810                 addrlen = sizeof(struct sockaddr_un);
 811         }
 812         else
 813 # endif /* NETUNIX */
 814 # if NETINET || NETINET6
 815         if (false
 816 #  if NETINET
 817                  || addr.sa.sa_family == AF_INET
 818 #  endif /* NETINET */
 819 #  if NETINET6
 820                  || addr.sa.sa_family == AF_INET6
 821 #  endif /* NETINET6 */
 822                  )
 823         {
 824                 unsigned short port;
 825
 826                 /* Parse port@host */
 827                 at = strchr(colon, '@');
 828                 if (at == NULL)
 829                 {
 830                         if (tTd(64, 5))
 831                                 sm_dprintf("X%s: bad address %s (expected port@host)\n",
 832                                         m->mf_name, colon);
 833                         if (parseonly)
 834                                 syserr("X%s: bad address %s (expected port@host)",
 835                                        m->mf_name, colon);
 836                         else if (MilterLogLevel > 0)
 837                                 sm_syslog(LOG_ERR, e->e_id,
 838                                           "Milter (%s): bad address %s (expected port@host)",
 839                                           m->mf_name, colon);
 840                         milter_error(m, e);
 841                         return -1;
 842                 }
 843                 *at = '\0';
 844                 if (isascii(*colon) && isdigit(*colon))
 845                         port = htons((unsigned short) atoi(colon));
 846                 else
 847                 {
 848 #  ifdef NO_GETSERVBYNAME
 849                         if (tTd(64, 5))
 850                                 sm_dprintf("X%s: invalid port number %s\n",
 851                                         m->mf_name, colon);
 852                         if (parseonly)
 853                                 syserr("X%s: invalid port number %s",
 854                                        m->mf_name, colon);
 855                         else if (MilterLogLevel > 0)
 856                                 sm_syslog(LOG_ERR, e->e_id,
 857                                           "Milter (%s): invalid port number %s",
 858                                           m->mf_name, colon);
 859                         milter_error(m, e);
 860                         return -1;
 861 #  else /* NO_GETSERVBYNAME */
 862                         struct servent *sp;
 863
 864                         sp = getservbyname(colon, "tcp");
 865                         if (sp == NULL)
 866                         {
 867                                 save_errno = errno;
 868                                 if (tTd(64, 5))
 869                                         sm_dprintf("X%s: unknown port name %s\n",
 870                                                 m->mf_name, colon);
 871                                 errno = save_errno;
 872                                 if (parseonly)
 873                                         syserr("X%s: unknown port name %s",
 874                                                m->mf_name, colon);
 875                                 else if (MilterLogLevel > 0)
 876                                         sm_syslog(LOG_ERR, e->e_id,
 877                                                   "Milter (%s): unknown port name %s",
 878                                                   m->mf_name, colon);
 879                                 milter_error(m, e);
 880                                 return -1;
 881                         }
 882                         port = sp->s_port;
 883 #  endif /* NO_GETSERVBYNAME */
 884                 }
 885                 *at++ = '@';
 886                 if (*at == '[')
 887                 {
 888                         char *end;
 889
 890                         end = strchr(at, ']');
 891                         if (end != NULL)
 892                         {
 893                                 bool found = false;
 894 #  if NETINET
 895                                 unsigned long hid = INADDR_NONE;
 896 #  endif /* NETINET */
 897 #  if NETINET6
 898                                 struct sockaddr_in6 hid6;
 899 #  endif /* NETINET6 */
 900
 901                                 *end = '\0';
 902 #  if NETINET
 903                                 if (addr.sa.sa_family == AF_INET &&
 904                                     (hid = inet_addr(&at[1])) != INADDR_NONE)
 905                                 {
 906                                         addr.sin.sin_addr.s_addr = hid;
 907                                         addr.sin.sin_port = port;
 908                                         found = true;
 909                                 }
 910 #  endif /* NETINET */
 911 #  if NETINET6
 912                                 (void) memset(&hid6, '\0', sizeof(hid6));
 913                                 if (addr.sa.sa_family == AF_INET6 &&
 914                                     anynet_pton(AF_INET6, &at[1],
 915                                                 &hid6.sin6_addr) == 1)
 916                                 {
 917                                         addr.sin6.sin6_addr = hid6.sin6_addr;
 918                                         addr.sin6.sin6_port = port;
 919                                         found = true;
 920                                 }
 921 #  endif /* NETINET6 */
 922                                 *end = ']';
 923                                 if (!found)
 924                                 {
 925                                         if (tTd(64, 5))
 926                                                 sm_dprintf("X%s: Invalid numeric domain spec \"%s\"\n",
 927                                                         m->mf_name, at);
 928                                         if (parseonly)
 929                                                 syserr("X%s: Invalid numeric domain spec \"%s\"",
 930                                                        m->mf_name, at);
 931                                         else if (MilterLogLevel > 0)
 932                                                 sm_syslog(LOG_ERR, e->e_id,
 933                                                           "Milter (%s): Invalid numeric domain spec \"%s\"",
 934                                                           m->mf_name, at);
 935                                         milter_error(m, e);
 936                                         return -1;
 937                                 }
 938                         }
 939                         else
 940                         {
 941                                 if (tTd(64, 5))
 942                                         sm_dprintf("X%s: Invalid numeric domain spec \"%s\"\n",
 943                                                 m->mf_name, at);
 944                                 if (parseonly)
 945                                         syserr("X%s: Invalid numeric domain spec \"%s\"",
 946                                                m->mf_name, at);
 947                                 else if (MilterLogLevel > 0)
 948                                         sm_syslog(LOG_ERR, e->e_id,
 949                                                   "Milter (%s): Invalid numeric domain spec \"%s\"",
 950                                                   m->mf_name, at);
 951                                 milter_error(m, e);
 952                                 return -1;
 953                         }
 954                 }
 955                 else
 956                 {
 957                         hp = sm_gethostbyname(at, addr.sa.sa_family);
 958                         if (hp == NULL)
 959                         {
 960                                 save_errno = errno;
 961                                 if (tTd(64, 5))
 962                                         sm_dprintf("X%s: Unknown host name %s\n",
 963                                                    m->mf_name, at);
 964                                 errno = save_errno;
 965                                 if (parseonly)
 966                                         syserr("X%s: Unknown host name %s",
 967                                                m->mf_name, at);
 968                                 else if (MilterLogLevel > 0)
 969                                         sm_syslog(LOG_ERR, e->e_id,
 970                                                   "Milter (%s): Unknown host name %s",
 971                                                   m->mf_name, at);
 972                                 milter_error(m, e);
 973                                 return -1;
 974                         }
 975                         addr.sa.sa_family = hp->h_addrtype;
 976                         switch (hp->h_addrtype)
 977                         {
 978 #  if NETINET
 979                           case AF_INET:
 980                                 memmove(&addr.sin.sin_addr,
 981                                         hp->h_addr, INADDRSZ);
 982                                 addr.sin.sin_port = port;
 983                                 addrlen = sizeof(struct sockaddr_in);
 984                                 addrno = 1;
 985                                 break;
 986 #  endif /* NETINET */
 987
 988 #  if NETINET6
 989                           case AF_INET6:
 990                                 memmove(&addr.sin6.sin6_addr,
 991                                         hp->h_addr, IN6ADDRSZ);
 992                                 addr.sin6.sin6_port = port;
 993                                 addrlen = sizeof(struct sockaddr_in6);
 994                                 addrno = 1;
 995                                 break;
 996 #  endif /* NETINET6 */
 997
 998                           default:
 999                                 if (tTd(64, 5))
1000                                         sm_dprintf("X%s: Unknown protocol for %s (%d)\n",
1001                                                    m->mf_name, at,
1002                                                    hp->h_addrtype);
1003                                 if (parseonly)
1004                                         syserr("X%s: Unknown protocol for %s (%d)",
1005                                                m->mf_name, at, hp->h_addrtype);
1006                                 else if (MilterLogLevel > 0)
1007                                         sm_syslog(LOG_ERR, e->e_id,
1008                                                   "Milter (%s): Unknown protocol for %s (%d)",
1009                                                   m->mf_name, at,
1010                                                   hp->h_addrtype);
1011                                 milter_error(m, e);
1012 #  if NETINET6
1013                                 freehostent(hp);
1014 #  endif /* NETINET6 */
1015                                 return -1;
1016                         }
1017                 }
1018         }
1019         else
1020 # endif /* NETINET || NETINET6 */
1021         {
1022                 if (tTd(64, 5))
1023                         sm_dprintf("X%s: unknown socket protocol\n",
1024                                    m->mf_name);
1025                 if (parseonly)
1026                         syserr("X%s: unknown socket protocol", m->mf_name);
1027                 else if (MilterLogLevel > 0)
1028                         sm_syslog(LOG_ERR, e->e_id,
1029                                   "Milter (%s): unknown socket protocol",
1030                                   m->mf_name);
1031                 milter_error(m, e);
1032                 return -1;
1033         }
1034
1035         /* just parsing through? */
1036         if (parseonly)
1037         {
1038                 m->mf_state = SMFS_READY;
1039 # if NETINET6
1040                 if (hp != NULL)
1041                         freehostent(hp);
1042 # endif /* NETINET6 */
1043                 return 0;
1044         }
1045
1046         /* sanity check */
1047         if (m->mf_state != SMFS_READY &&
1048             m->mf_state != SMFS_CLOSED)
1049         {
1050                 /* shouldn't happen */
1051                 if (tTd(64, 1))
1052                         sm_dprintf("Milter (%s): Trying to open filter in state %c\n",
1053                                    m->mf_name, (char) m->mf_state);
1054                 milter_error(m, e);
1055 # if NETINET6
1056                 if (hp != NULL)
1057                         freehostent(hp);
1058 # endif /* NETINET6 */
1059                 return -1;
1060         }
1061
1062         /* nope, actually connecting */
1063         for (;;)
1064         {
1065                 sock = socket(addr.sa.sa_family, SOCK_STREAM, 0);
1066                 if (sock < 0)
1067                 {
1068                         save_errno = errno;
1069                         if (tTd(64, 5))
1070                                 sm_dprintf("Milter (%s): error creating socket: %s\n",
1071                                            m->mf_name,
1072                                            sm_errstring(save_errno));
1073                         if (MilterLogLevel > 0)
1074                                 sm_syslog(LOG_ERR, e->e_id,
1075                                           "Milter (%s): error creating socket: %s",
1076                                           m->mf_name, sm_errstring(save_errno));
1077                         milter_error(m, e);
1078 # if NETINET6
1079                         if (hp != NULL)
1080                                 freehostent(hp);
1081 # endif /* NETINET6 */
1082                         return -1;
1083                 }
1084
1085                 if (setjmp(MilterConnectTimeout) == 0)
1086                 {
1087                         SM_EVENT *ev = NULL;
1088                         int i;
1089
1090                         if (m->mf_timeout[SMFTO_CONNECT] > 0)
1091                                 ev = sm_setevent(m->mf_timeout[SMFTO_CONNECT],
1092                                                  milter_connect_timeout, 0);
1093
1094                         i = connect(sock, (struct sockaddr *) &addr, addrlen);
1095                         save_errno = errno;
1096                         if (ev != NULL)
1097                                 sm_clrevent(ev);
1098                         errno = save_errno;
1099                         if (i >= 0)
1100                                 break;
1101                 }
1102
1103                 /* couldn't connect.... try next address */
1104                 save_errno = errno;
1105                 p = CurHostName;
1106                 CurHostName = at;
1107                 if (tTd(64, 5))
1108                         sm_dprintf("milter_open (%s): open %s failed: %s\n",
1109                                    m->mf_name, at, sm_errstring(save_errno));
1110                 if (MilterLogLevel > 13)
1111                         sm_syslog(LOG_INFO, e->e_id,
1112                                   "Milter (%s): open %s failed: %s",
1113                                   m->mf_name, at, sm_errstring(save_errno));
1114                 CurHostName = p;
1115                 (void) close(sock);
1116
1117                 /* try next address */
1118                 if (hp != NULL && hp->h_addr_list[addrno] != NULL)
1119                 {
1120                         switch (addr.sa.sa_family)
1121                         {
1122 # if NETINET
1123                           case AF_INET:
1124                                 memmove(&addr.sin.sin_addr,
1125                                         hp->h_addr_list[addrno++],
1126                                         INADDRSZ);
1127                                 break;
1128 # endif /* NETINET */
1129
1130 # if NETINET6
1131                           case AF_INET6:
1132                                 memmove(&addr.sin6.sin6_addr,
1133                                         hp->h_addr_list[addrno++],
1134                                         IN6ADDRSZ);
1135                                 break;
1136 # endif /* NETINET6 */
1137
1138                           default:
1139                                 if (tTd(64, 5))
1140                                         sm_dprintf("X%s: Unknown protocol for %s (%d)\n",
1141                                                    m->mf_name, at,
1142                                                    hp->h_addrtype);
1143                                 if (MilterLogLevel > 0)
1144                                         sm_syslog(LOG_ERR, e->e_id,
1145                                                   "Milter (%s): Unknown protocol for %s (%d)",
1146                                                   m->mf_name, at,
1147                                                   hp->h_addrtype);
1148                                 milter_error(m, e);
1149 # if NETINET6
1150                                 freehostent(hp);
1151 # endif /* NETINET6 */
1152                                 return -1;
1153                         }
1154                         continue;
1155                 }
1156                 p = CurHostName;
1157                 CurHostName = at;
1158                 if (tTd(64, 5))
1159                         sm_dprintf("X%s: error connecting to filter: %s\n",
1160                                    m->mf_name, sm_errstring(save_errno));
1161                 if (MilterLogLevel > 0)
1162                         sm_syslog(LOG_ERR, e->e_id,
1163                                   "Milter (%s): error connecting to filter: %s",
1164                                   m->mf_name, sm_errstring(save_errno));
1165                 CurHostName = p;
1166                 milter_error(m, e);
1167 # if NETINET6
1168                 if (hp != NULL)
1169                         freehostent(hp);
1170 # endif /* NETINET6 */
1171                 return -1;
1172         }
1173         m->mf_state = SMFS_OPEN;
1174 # if NETINET6
1175         if (hp != NULL)
1176         {
1177                 freehostent(hp);
1178                 hp = NULL;
1179         }
1180 # endif /* NETINET6 */
1181 # if MILTER_NO_NAGLE && !defined(TCP_CORK)
1182         {
1183                 int nodelay = 1;
1184
1185                 setsockopt(m->mf_sock, IPPROTO_TCP, TCP_NODELAY,
1186                            (char *)&nodelay, sizeof(nodelay));
1187         }
1188 # endif /* MILTER_NO_NAGLE && !defined(TCP_CORK) */
1189         return sock;
1190 }
1191
1192 static void
1193 milter_connect_timeout(ignore)
1194         int ignore;
1195 {
1196         /*
1197         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
1198         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
1199         **      DOING.
1200         */
1201
1202         errno = ETIMEDOUT;
1203         longjmp(MilterConnectTimeout, 1);
1204 }
1205
1206 /*
1207 **  MILTER_SETUP -- setup structure for a mail filter
1208 **
1209 **      Parameters:
1210 **              line -- the options line.
1211 **
1212 **      Returns:
1213 **              none
1214 */
1215
1216 void
1217 milter_setup(line)
1218         char *line;
1219 {
1220         char fcode;
1221         char *p;
1222         struct milter *m;
1223         STAB *s;
1224
1225         /* collect the filter name */
1226         for (p = line;
1227              *p != '\0' && *p != ',' && !(isascii(*p) && isspace(*p));
1228              p++)
1229                 continue;
1230         if (*p != '\0')
1231                 *p++ = '\0';
1232         if (line[0] == '\0')
1233         {
1234                 syserr("name required for mail filter");
1235                 return;
1236         }
1237         m = (struct milter *) xalloc(sizeof(*m));
1238         memset((char *) m, '\0', sizeof(*m));
1239         m->mf_name = newstr(line);
1240         m->mf_state = SMFS_READY;
1241         m->mf_sock = -1;
1242         m->mf_timeout[SMFTO_CONNECT] = (time_t) 300;
1243         m->mf_timeout[SMFTO_WRITE] = (time_t) 10;
1244         m->mf_timeout[SMFTO_READ] = (time_t) 10;
1245         m->mf_timeout[SMFTO_EOM] = (time_t) 300;
1246 #if _FFR_MILTER_CHECK
1247         m->mf_mta_prot_version = SMFI_PROT_VERSION;
1248         m->mf_mta_prot_flags = SMFI_CURR_PROT;
1249         m->mf_mta_actions = SMFI_CURR_ACTS;
1250 #endif /* _FFR_MILTER_CHECK */
1251
1252         /* now scan through and assign info from the fields */
1253         while (*p != '\0')
1254         {
1255                 char *delimptr;
1256
1257                 while (*p != '\0' &&
1258                        (*p == ',' || (isascii(*p) && isspace(*p))))
1259                         p++;
1260
1261                 /* p now points to field code */
1262                 fcode = *p;
1263                 while (*p != '\0' && *p != '=' && *p != ',')
1264                         p++;
1265                 if (*p++ != '=')
1266                 {
1267                         syserr("X%s: `=' expected", m->mf_name);
1268                         return;
1269                 }
1270                 while (isascii(*p) && isspace(*p))
1271                         p++;
1272
1273                 /* p now points to the field body */
1274                 p = munchstring(p, &delimptr, ',');
1275
1276                 /* install the field into the filter struct */
1277                 switch (fcode)
1278                 {
1279                   case 'S':             /* socket */
1280                         if (p == NULL)
1281                                 m->mf_conn = NULL;
1282                         else
1283                                 m->mf_conn = newstr(p);
1284                         break;
1285
1286                   case 'F':             /* Milter flags configured on MTA */
1287                         for (; *p != '\0'; p++)
1288                         {
1289                                 if (!(isascii(*p) && isspace(*p)))
1290                                         setbitn(bitidx(*p), m->mf_flags);
1291                         }
1292                         break;
1293
1294                   case 'T':             /* timeouts */
1295                         milter_parse_timeouts(p, m);
1296                         break;
1297
1298 #if _FFR_MILTER_CHECK
1299                   case 'a':
1300                         m->mf_mta_actions = strtoul(p, NULL, 0);
1301                         break;
1302                   case 'f':
1303                         m->mf_mta_prot_flags = strtoul(p, NULL, 0);
1304                         break;
1305                   case 'v':
1306                         m->mf_mta_prot_version = strtoul(p, NULL, 0);
1307                         break;
1308 #endif /* _FFR_MILTER_CHECK */
1309
1310                   default:
1311                         syserr("X%s: unknown filter equate %c=",
1312                                m->mf_name, fcode);
1313                         break;
1314                 }
1315                 p = delimptr;
1316         }
1317
1318         /* early check for errors */
1319         (void) milter_open(m, true, CurEnv);
1320
1321         /* enter the filter into the symbol table */
1322         s = stab(m->mf_name, ST_MILTER, ST_ENTER);
1323         if (s->s_milter != NULL)
1324                 syserr("X%s: duplicate filter definition", m->mf_name);
1325         else
1326                 s->s_milter = m;
1327 }
1328
1329 /*
1330 **  MILTER_CONFIG -- parse option list into an array and check config
1331 **
1332 **      Called when reading configuration file.
1333 **
1334 **      Parameters:
1335 **              spec -- the filter list.
1336 **              list -- the array to fill in.
1337 **              max -- the maximum number of entries in list.
1338 **
1339 **      Returns:
1340 **              none
1341 */
1342
1343 void
1344 milter_config(spec, list, max)
1345         char *spec;
1346         struct milter **list;
1347         int max;
1348 {
1349         int numitems = 0;
1350         char *p;
1351
1352         /* leave one for the NULL signifying the end of the list */
1353         max--;
1354
1355         for (p = spec; p != NULL; )
1356         {
1357                 STAB *s;
1358
1359                 while (isascii(*p) && isspace(*p))
1360                         p++;
1361                 if (*p == '\0')
1362                         break;
1363                 spec = p;
1364
1365                 if (numitems >= max)
1366                 {
1367                         syserr("Too many filters defined, %d max", max);
1368                         if (max > 0)
1369                                 list[0] = NULL;
1370                         return;
1371                 }
1372                 p = strpbrk(p, ";,");
1373                 if (p != NULL)
1374                         *p++ = '\0';
1375
1376                 s = stab(spec, ST_MILTER, ST_FIND);
1377                 if (s == NULL)
1378                 {
1379                         syserr("InputFilter %s not defined", spec);
1380                         ExitStat = EX_CONFIG;
1381                         return;
1382                 }
1383                 list[numitems++] = s->s_milter;
1384         }
1385         list[numitems] = NULL;
1386
1387         /* if not set, set to LogLevel */
1388         if (MilterLogLevel == -1)
1389                 MilterLogLevel = LogLevel;
1390 }
1391
1392 /*
1393 **  MILTER_PARSE_TIMEOUTS -- parse timeout list
1394 **
1395 **      Called when reading configuration file.
1396 **
1397 **      Parameters:
1398 **              spec -- the timeout list.
1399 **              m -- milter to set.
1400 **
1401 **      Returns:
1402 **              none
1403 */
1404
1405 static void
1406 milter_parse_timeouts(spec, m)
1407         char *spec;
1408         struct milter *m;
1409 {
1410         char fcode;
1411         int tcode;
1412         char *p;
1413
1414         p = spec;
1415
1416         /* now scan through and assign info from the fields */
1417         while (*p != '\0')
1418         {
1419                 char *delimptr;
1420
1421                 while (*p != '\0' &&
1422                        (*p == ';' || (isascii(*p) && isspace(*p))))
1423                         p++;
1424
1425                 /* p now points to field code */
1426                 fcode = *p;
1427                 while (*p != '\0' && *p != ':')
1428                         p++;
1429                 if (*p++ != ':')
1430                 {
1431                         syserr("X%s, T=: `:' expected", m->mf_name);
1432                         return;
1433                 }
1434                 while (isascii(*p) && isspace(*p))
1435                         p++;
1436
1437                 /* p now points to the field body */
1438                 p = munchstring(p, &delimptr, ';');
1439                 tcode = -1;
1440
1441                 /* install the field into the filter struct */
1442                 switch (fcode)
1443                 {
1444                   case 'C':
1445                         tcode = SMFTO_CONNECT;
1446                         break;
1447
1448                   case 'S':
1449                         tcode = SMFTO_WRITE;
1450                         break;
1451
1452                   case 'R':
1453                         tcode = SMFTO_READ;
1454                         break;
1455
1456                   case 'E':
1457                         tcode = SMFTO_EOM;
1458                         break;
1459
1460                   default:
1461                         if (tTd(64, 5))
1462                                 sm_dprintf("X%s: %c unknown\n",
1463                                            m->mf_name, fcode);
1464                         syserr("X%s: unknown filter timeout %c",
1465                                m->mf_name, fcode);
1466                         break;
1467                 }
1468                 if (tcode >= 0)
1469                 {
1470                         m->mf_timeout[tcode] = convtime(p, 's');
1471                         if (tTd(64, 5))
1472                                 sm_dprintf("X%s: %c=%ld\n",
1473                                            m->mf_name, fcode,
1474                                            (u_long) m->mf_timeout[tcode]);
1475                 }
1476                 p = delimptr;
1477         }
1478 }
1479
1480 /*
1481 **  MILTER_SET_MACROS -- set milter macros
1482 **
1483 **      Parameters:
1484 **              name -- name of milter.
1485 **              macros -- where to store macros.
1486 **              val -- the value of the option.
1487 **              nummac -- current number of macros
1488 **
1489 **      Returns:
1490 **              new number of macros
1491 */
1492
1493 static int
1494 milter_set_macros(name, macros, val, nummac)
1495         char *name;
1496         char **macros;
1497         char *val;
1498         int nummac;
1499 {
1500         char *p;
1501
1502         p = newstr(val);
1503         while (*p != '\0')
1504         {
1505                 char *macro;
1506
1507                 /* Skip leading commas, spaces */
1508                 while (*p != '\0' &&
1509                        (*p == ',' || (isascii(*p) && isspace(*p))))
1510                         p++;
1511
1512                 if (*p == '\0')
1513                         break;
1514
1515                 /* Find end of macro */
1516                 macro = p;
1517                 while (*p != '\0' && *p != ',' &&
1518                        isascii(*p) && !isspace(*p))
1519                         p++;
1520                 if (*p != '\0')
1521                         *p++ = '\0';
1522
1523                 if (nummac >= MAXFILTERMACROS)
1524                 {
1525                         syserr("milter_set_option: too many macros in Milter.%s (max %d)",
1526                                name, MAXFILTERMACROS);
1527                         macros[nummac] = NULL;
1528                         return -1;
1529                 }
1530                 macros[nummac++] = macro;
1531         }
1532         macros[nummac] = NULL;
1533         return nummac;
1534 }
1535
1536 /*
1537 **  MILTER_SET_OPTION -- set an individual milter option
1538 **
1539 **      Parameters:
1540 **              name -- the name of the option.
1541 **              val -- the value of the option.
1542 **              sticky -- if set, don't let other setoptions override
1543 **                      this value.
1544 **
1545 **      Returns:
1546 **              none.
1547 */
1548
1549 /* set if Milter sub-option is stuck */
1550 static BITMAP256        StickyMilterOpt;
1551
1552 static struct milteropt
1553 {
1554         char            *mo_name;       /* long name of milter option */
1555         unsigned char   mo_code;        /* code for option */
1556 } MilterOptTab[] =
1557 {
1558 # define MO_MACROS_CONNECT              SMFIM_CONNECT
1559         { "macros.connect",             MO_MACROS_CONNECT               },
1560 # define MO_MACROS_HELO                 SMFIM_HELO
1561         { "macros.helo",                MO_MACROS_HELO                  },
1562 # define MO_MACROS_ENVFROM              SMFIM_ENVFROM
1563         { "macros.envfrom",             MO_MACROS_ENVFROM               },
1564 # define MO_MACROS_ENVRCPT              SMFIM_ENVRCPT
1565         { "macros.envrcpt",             MO_MACROS_ENVRCPT               },
1566 # define MO_MACROS_DATA                 SMFIM_DATA
1567         { "macros.data",                MO_MACROS_DATA                  },
1568 # define MO_MACROS_EOM                  SMFIM_EOM
1569         { "macros.eom",                 MO_MACROS_EOM                   },
1570 # define MO_MACROS_EOH                  SMFIM_EOH
1571         { "macros.eoh",                 MO_MACROS_EOH                   },
1572
1573 # define MO_LOGLEVEL                    0x07
1574         { "loglevel",                   MO_LOGLEVEL                     },
1575 # if _FFR_MAXDATASIZE
1576 #  define MO_MAXDATASIZE                0x08
1577         { "maxdatasize",                MO_MAXDATASIZE                  },
1578 # endif /* _FFR_MAXDATASIZE */
1579         { NULL,                         (unsigned char)-1               },
1580 };
1581
1582 void
1583 milter_set_option(name, val, sticky)
1584         char *name;
1585         char *val;
1586         bool sticky;
1587 {
1588         int nummac, r;
1589         struct milteropt *mo;
1590         char **macros = NULL;
1591
1592         nummac = 0;
1593         if (tTd(37, 2) || tTd(64, 5))
1594                 sm_dprintf("milter_set_option(%s = %s)", name, val);
1595
1596         if (name == NULL)
1597         {
1598                 syserr("milter_set_option: invalid Milter option, must specify suboption");
1599                 return;
1600         }
1601
1602         for (mo = MilterOptTab; mo->mo_name != NULL; mo++)
1603         {
1604                 if (sm_strcasecmp(mo->mo_name, name) == 0)
1605                         break;
1606         }
1607
1608         if (mo->mo_name == NULL)
1609         {
1610                 syserr("milter_set_option: invalid Milter option %s", name);
1611                 return;
1612         }
1613
1614         /*
1615         **  See if this option is preset for us.
1616         */
1617
1618         if (!sticky && bitnset(mo->mo_code, StickyMilterOpt))
1619         {
1620                 if (tTd(37, 2) || tTd(64,5))
1621                         sm_dprintf(" (ignored)\n");
1622                 return;
1623         }
1624
1625         if (tTd(37, 2) || tTd(64,5))
1626                 sm_dprintf("\n");
1627
1628         switch (mo->mo_code)
1629         {
1630           case MO_LOGLEVEL:
1631                 MilterLogLevel = atoi(val);
1632                 break;
1633
1634 #if _FFR_MAXDATASIZE
1635           case MO_MAXDATASIZE:
1636                 MilterMaxDataSize = (size_t)atol(val);
1637                 break;
1638 #endif /* _FFR_MAXDATASIZE */
1639
1640           case MO_MACROS_CONNECT:
1641                 if (macros == NULL)
1642                         macros = MilterConnectMacros;
1643                 /* FALLTHROUGH */
1644
1645           case MO_MACROS_HELO:
1646                 if (macros == NULL)
1647                         macros = MilterHeloMacros;
1648                 /* FALLTHROUGH */
1649
1650           case MO_MACROS_ENVFROM:
1651                 if (macros == NULL)
1652                         macros = MilterEnvFromMacros;
1653                 /* FALLTHROUGH */
1654
1655           case MO_MACROS_ENVRCPT:
1656                 if (macros == NULL)
1657                         macros = MilterEnvRcptMacros;
1658                 /* FALLTHROUGH */
1659
1660           case MO_MACROS_EOH:
1661                 if (macros == NULL)
1662                         macros = MilterEOHMacros;
1663                 /* FALLTHROUGH */
1664
1665           case MO_MACROS_EOM:
1666                 if (macros == NULL)
1667                         macros = MilterEOMMacros;
1668                 /* FALLTHROUGH */
1669
1670           case MO_MACROS_DATA:
1671                 if (macros == NULL)
1672                         macros = MilterDataMacros;
1673
1674                 r = milter_set_macros(name, macros, val, nummac);
1675                 if (r >= 0)
1676                         nummac = r;
1677                 break;
1678
1679           default:
1680                 syserr("milter_set_option: invalid Milter option %s", name);
1681                 break;
1682         }
1683         if (sticky)
1684                 setbitn(mo->mo_code, StickyMilterOpt);
1685 }
1686
1687 /*
1688 **  MILTER_REOPEN_DF -- open & truncate the data file (for replbody)
1689 **
1690 **      Parameters:
1691 **              e -- current envelope.
1692 **
1693 **      Returns:
1694 **              0 if succesful, -1 otherwise
1695 */
1696
1697 static int
1698 milter_reopen_df(e)
1699         ENVELOPE *e;
1700 {
1701         char dfname[MAXPATHLEN];
1702
1703         (void) sm_strlcpy(dfname, queuename(e, DATAFL_LETTER), sizeof(dfname));
1704
1705         /*
1706         **  In SuperSafe == SAFE_REALLY mode, e->e_dfp is a read-only FP so
1707         **  close and reopen writable (later close and reopen
1708         **  read only again).
1709         **
1710         **  In SuperSafe != SAFE_REALLY mode, e->e_dfp still points at the
1711         **  buffered file I/O descriptor, still open for writing so there
1712         **  isn't any work to do here (except checking for consistency).
1713         */
1714
1715         if (SuperSafe == SAFE_REALLY)
1716         {
1717                 /* close read-only data file */
1718                 if (bitset(EF_HAS_DF, e->e_flags) && e->e_dfp != NULL)
1719                 {
1720                         (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT);
1721                         e->e_flags &= ~EF_HAS_DF;
1722                 }
1723
1724                 /* open writable */
1725                 if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname,
1726                                            SM_IO_RDWR_B, NULL)) == NULL)
1727                 {
1728                         MILTER_DF_ERROR("milter_reopen_df: sm_io_open %s: %s");
1729                         return -1;
1730                 }
1731         }
1732         else if (e->e_dfp == NULL)
1733         {
1734                 /* shouldn't happen */
1735                 errno = ENOENT;
1736                 MILTER_DF_ERROR("milter_reopen_df: NULL e_dfp (%s: %s)");
1737                 return -1;
1738         }
1739         return 0;
1740 }
1741
1742 /*
1743 **  MILTER_RESET_DF -- re-open read-only the data file (for replbody)
1744 **
1745 **      Parameters:
1746 **              e -- current envelope.
1747 **
1748 **      Returns:
1749 **              0 if succesful, -1 otherwise
1750 */
1751
1752 static int
1753 milter_reset_df(e)
1754         ENVELOPE *e;
1755 {
1756         int afd;
1757         char dfname[MAXPATHLEN];
1758
1759         (void) sm_strlcpy(dfname, queuename(e, DATAFL_LETTER), sizeof(dfname));
1760
1761         if (sm_io_flush(e->e_dfp, SM_TIME_DEFAULT) != 0 ||
1762             sm_io_error(e->e_dfp))
1763         {
1764                 MILTER_DF_ERROR("milter_reset_df: error writing/flushing %s: %s");
1765                 return -1;
1766         }
1767         else if (SuperSafe != SAFE_REALLY)
1768         {
1769                 /* skip next few clauses */
1770                 /* EMPTY */
1771         }
1772         else if ((afd = sm_io_getinfo(e->e_dfp, SM_IO_WHAT_FD, NULL)) >= 0
1773                  && fsync(afd) < 0)
1774         {
1775                 MILTER_DF_ERROR("milter_reset_df: error sync'ing %s: %s");
1776                 return -1;
1777         }
1778         else if (sm_io_close(e->e_dfp, SM_TIME_DEFAULT) < 0)
1779         {
1780                 MILTER_DF_ERROR("milter_reset_df: error closing %s: %s");
1781                 return -1;
1782         }
1783         else if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname,
1784                                         SM_IO_RDONLY_B, NULL)) == NULL)
1785         {
1786                 MILTER_DF_ERROR("milter_reset_df: error reopening %s: %s");
1787                 return -1;
1788         }
1789         else
1790                 e->e_flags |= EF_HAS_DF;
1791         return 0;
1792 }
1793
1794 /*
1795 **  MILTER_QUIT_FILTER -- close down a single filter
1796 **
1797 **      Parameters:
1798 **              m -- milter structure of filter to close down.
1799 **              e -- current envelope.
1800 **
1801 **      Returns:
1802 **              none
1803 */
1804
1805 static void
1806 milter_quit_filter(m, e)
1807         struct milter *m;
1808         ENVELOPE *e;
1809 {
1810         if (tTd(64, 10))
1811                 sm_dprintf("milter_quit_filter(%s)\n", m->mf_name);
1812         if (MilterLogLevel > 18)
1813                 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): quit filter",
1814                           m->mf_name);
1815
1816         /* Never replace error state */
1817         if (m->mf_state == SMFS_ERROR)
1818                 return;
1819
1820         if (m->mf_sock < 0 ||
1821             m->mf_state == SMFS_CLOSED ||
1822             m->mf_state == SMFS_READY)
1823         {
1824                 m->mf_sock = -1;
1825                 m->mf_state = SMFS_CLOSED;
1826                 return;
1827         }
1828
1829         (void) milter_write(m, SMFIC_QUIT, (char *) NULL, 0,
1830                             m->mf_timeout[SMFTO_WRITE], e, "quit_filter");
1831         if (m->mf_sock >= 0)
1832         {
1833                 (void) close(m->mf_sock);
1834                 m->mf_sock = -1;
1835         }
1836         if (m->mf_state != SMFS_ERROR)
1837                 m->mf_state = SMFS_CLOSED;
1838 }
1839
1840 /*
1841 **  MILTER_ABORT_FILTER -- tell filter to abort current message
1842 **
1843 **      Parameters:
1844 **              m -- milter structure of filter to abort.
1845 **              e -- current envelope.
1846 **
1847 **      Returns:
1848 **              none
1849 */
1850
1851 static void
1852 milter_abort_filter(m, e)
1853         struct milter *m;
1854         ENVELOPE *e;
1855 {
1856         if (tTd(64, 10))
1857                 sm_dprintf("milter_abort_filter(%s)\n", m->mf_name);
1858         if (MilterLogLevel > 10)
1859                 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): abort filter",
1860                           m->mf_name);
1861
1862         if (m->mf_sock < 0 ||
1863             m->mf_state != SMFS_INMSG)
1864                 return;
1865
1866         (void) milter_write(m, SMFIC_ABORT, (char *) NULL, 0,
1867                             m->mf_timeout[SMFTO_WRITE], e, "abort_filter");
1868         if (m->mf_state != SMFS_ERROR)
1869                 m->mf_state = SMFS_DONE;
1870 }
1871
1872 /*
1873 **  MILTER_SEND_MACROS -- provide macros to the filters
1874 **
1875 **      Parameters:
1876 **              m -- milter to send macros to.
1877 **              macros -- macros to send for filter smfi_getsymval().
1878 **              cmd -- which command the macros are associated with.
1879 **              e -- current envelope (for macro access).
1880 **
1881 **      Returns:
1882 **              none
1883 */
1884
1885 static void
1886 milter_send_macros(m, macros, cmd, e)
1887         struct milter *m;
1888         char **macros;
1889         int cmd;
1890         ENVELOPE *e;
1891 {
1892         int i;
1893         int mid;
1894         char command = (char) cmd;
1895         char *v;
1896         char *buf, *bp;
1897         char exp[MAXLINE];
1898         ssize_t s;
1899
1900         /* sanity check */
1901         if (macros == NULL || macros[0] == NULL)
1902                 return;
1903
1904         /* put together data */
1905         s = 1;                  /* for the command character */
1906         for (i = 0; macros[i] != NULL; i++)
1907         {
1908                 mid = macid(macros[i]);
1909                 if (mid == 0)
1910                         continue;
1911                 v = macvalue(mid, e);
1912                 if (v == NULL)
1913                         continue;
1914                 expand(v, exp, sizeof(exp), e);
1915                 s += strlen(macros[i]) + 1 + strlen(exp) + 1;
1916         }
1917
1918         if (s < 0)
1919                 return;
1920
1921         buf = (char *) xalloc(s);
1922         bp = buf;
1923         *bp++ = command;
1924         for (i = 0; macros[i] != NULL; i++)
1925         {
1926                 mid = macid(macros[i]);
1927                 if (mid == 0)
1928                         continue;
1929                 v = macvalue(mid, e);
1930                 if (v == NULL)
1931                         continue;
1932                 expand(v, exp, sizeof(exp), e);
1933
1934                 if (tTd(64, 10))
1935                         sm_dprintf("milter_send_macros(%s, %c): %s=%s\n",
1936                                 m->mf_name, command, macros[i], exp);
1937
1938                 (void) sm_strlcpy(bp, macros[i], s - (bp - buf));
1939                 bp += strlen(bp) + 1;
1940                 (void) sm_strlcpy(bp, exp, s - (bp - buf));
1941                 bp += strlen(bp) + 1;
1942         }
1943         (void) milter_write(m, SMFIC_MACRO, buf, s,
1944                             m->mf_timeout[SMFTO_WRITE], e, "send_macros");
1945         sm_free(buf);
1946 }
1947
1948 /*
1949 **  MILTER_SEND_COMMAND -- send a command and return the response for a filter
1950 **
1951 **      Parameters:
1952 **              m -- current milter filter
1953 **              cmd -- command to send.
1954 **              data -- optional command data.
1955 **              sz -- length of buf.
1956 **              e -- current envelope (for e->e_id).
1957 **              state -- return state word.
1958 **
1959 **      Returns:
1960 **              response string (may be NULL)
1961 */
1962
1963 static char *
1964 milter_send_command(m, cmd, data, sz, e, state, where)
1965         struct milter *m;
1966         int cmd;
1967         void *data;
1968         ssize_t sz;
1969         ENVELOPE *e;
1970         char *state;
1971         const char *where;
1972 {
1973         char rcmd;
1974         ssize_t rlen;
1975         unsigned long skipflag;
1976         unsigned long norespflag = 0;
1977         char command = (char) cmd;
1978         char *action;
1979         char *defresponse;
1980         char *response;
1981
1982         if (tTd(64, 10))
1983                 sm_dprintf("milter_send_command(%s): cmd %c len %ld\n",
1984                         m->mf_name, (char) command, (long) sz);
1985
1986         /* find skip flag and default failure */
1987         switch (command)
1988         {
1989           case SMFIC_CONNECT:
1990                 skipflag = SMFIP_NOCONNECT;
1991                 norespflag = SMFIP_NR_CONN;
1992                 action = "connect";
1993                 defresponse = "554 Command rejected";
1994                 break;
1995
1996           case SMFIC_HELO:
1997                 skipflag = SMFIP_NOHELO;
1998                 norespflag = SMFIP_NR_HELO;
1999                 action = "helo";
2000                 defresponse = "550 Command rejected";
2001                 break;
2002
2003           case SMFIC_MAIL:
2004                 skipflag = SMFIP_NOMAIL;
2005                 norespflag = SMFIP_NR_MAIL;
2006                 action = "mail";
2007                 defresponse = "550 5.7.1 Command rejected";
2008                 break;
2009
2010           case SMFIC_RCPT:
2011                 skipflag = SMFIP_NORCPT;
2012                 norespflag = SMFIP_NR_RCPT;
2013                 action = "rcpt";
2014                 defresponse = "550 5.7.1 Command rejected";
2015                 break;
2016
2017           case SMFIC_HEADER:
2018                 skipflag = SMFIP_NOHDRS;
2019                 norespflag = SMFIP_NR_HDR;
2020                 action = "header";
2021                 defresponse = "550 5.7.1 Command rejected";
2022                 break;
2023
2024           case SMFIC_BODY:
2025                 skipflag = SMFIP_NOBODY;
2026                 norespflag = SMFIP_NR_BODY;
2027                 action = "body";
2028                 defresponse = "554 5.7.1 Command rejected";
2029                 break;
2030
2031           case SMFIC_EOH:
2032                 skipflag = SMFIP_NOEOH;
2033                 norespflag = SMFIP_NR_EOH;
2034                 action = "eoh";
2035                 defresponse = "550 5.7.1 Command rejected";
2036                 break;
2037
2038           case SMFIC_UNKNOWN:
2039                 skipflag = SMFIP_NOUNKNOWN;
2040                 norespflag = SMFIP_NR_UNKN;
2041                 action = "unknown";
2042                 defresponse = "550 5.7.1 Command rejected";
2043                 break;
2044
2045           case SMFIC_DATA:
2046                 skipflag = SMFIP_NODATA;
2047                 norespflag = SMFIP_NR_DATA;
2048                 action = "data";
2049                 defresponse = "550 5.7.1 Command rejected";
2050                 break;
2051
2052           case SMFIC_BODYEOB:
2053           case SMFIC_OPTNEG:
2054           case SMFIC_MACRO:
2055           case SMFIC_ABORT:
2056           case SMFIC_QUIT:
2057                 /* NOTE: not handled by milter_send_command() */
2058                 /* FALLTHROUGH */
2059
2060           default:
2061                 skipflag = 0;
2062                 action = "default";
2063                 defresponse = "550 5.7.1 Command rejected";
2064                 break;
2065         }
2066
2067         if (tTd(64, 10))
2068                 sm_dprintf("milter_send_command(%s): skip=%lx, pflags=%x\n",
2069                         m->mf_name, skipflag, m->mf_pflags);
2070
2071         /* check if filter wants this command */
2072         if (skipflag != 0 && bitset(skipflag, m->mf_pflags))
2073                 return NULL;
2074
2075         /* send the command to the filter */
2076         (void) milter_write(m, command, data, sz,
2077                             m->mf_timeout[SMFTO_WRITE], e, where);
2078         if (m->mf_state == SMFS_ERROR)
2079         {
2080                 MILTER_CHECK_ERROR(false, return NULL);
2081                 return NULL;
2082         }
2083
2084         /* check if filter sends response to this command */
2085         if (norespflag != 0 && bitset(norespflag, m->mf_pflags))
2086                 return NULL;
2087
2088         /* get the response from the filter */
2089         response = milter_read(m, &rcmd, &rlen,
2090                                m->mf_timeout[SMFTO_READ], e, where);
2091         if (m->mf_state == SMFS_ERROR)
2092         {
2093                 MILTER_CHECK_ERROR(false, return NULL);
2094                 return NULL;
2095         }
2096
2097         if (tTd(64, 10))
2098                 sm_dprintf("milter_send_command(%s): returned %c\n",
2099                            m->mf_name, (char) rcmd);
2100
2101         switch (rcmd)
2102         {
2103           case SMFIR_REPLYCODE:
2104                 MILTER_CHECK_REPLYCODE(defresponse);
2105                 if (MilterLogLevel > 10)
2106                         sm_syslog(LOG_INFO, e->e_id,
2107                                   "milter=%s, action=%s, reject=%s",
2108                                   m->mf_name, action, response);
2109                 *state = rcmd;
2110                 break;
2111
2112           case SMFIR_REJECT:
2113                 if (MilterLogLevel > 10)
2114                         sm_syslog(LOG_INFO, e->e_id,
2115                                   "milter=%s, action=%s, reject",
2116                                   m->mf_name, action);
2117                 *state = rcmd;
2118                 break;
2119
2120           case SMFIR_DISCARD:
2121                 if (MilterLogLevel > 10)
2122                         sm_syslog(LOG_INFO, e->e_id,
2123                                   "milter=%s, action=%s, discard",
2124                                   m->mf_name, action);
2125                 *state = rcmd;
2126                 break;
2127
2128           case SMFIR_TEMPFAIL:
2129                 if (MilterLogLevel > 10)
2130                         sm_syslog(LOG_INFO, e->e_id,
2131                                   "milter=%s, action=%s, tempfail",
2132                                   m->mf_name, action);
2133                 *state = rcmd;
2134                 break;
2135
2136           case SMFIR_ACCEPT:
2137                 /* this filter is done with message/connection */
2138                 if (command == SMFIC_HELO ||
2139                     command == SMFIC_CONNECT)
2140                         m->mf_state = SMFS_CLOSABLE;
2141                 else
2142                         m->mf_state = SMFS_DONE;
2143                 if (MilterLogLevel > 10)
2144                         sm_syslog(LOG_INFO, e->e_id,
2145                                   "milter=%s, action=%s, accepted",
2146                                   m->mf_name, action);
2147                 break;
2148
2149           case SMFIR_CONTINUE:
2150                 /* if MAIL command is ok, filter is in message state */
2151                 if (command == SMFIC_MAIL)
2152                         m->mf_state = SMFS_INMSG;
2153                 if (MilterLogLevel > 12)
2154                         sm_syslog(LOG_INFO, e->e_id,
2155                                   "milter=%s, action=%s, continue",
2156                                   m->mf_name, action);
2157                 break;
2158
2159           case SMFIR_SKIP:
2160                 if (MilterLogLevel > 12)
2161                         sm_syslog(LOG_INFO, e->e_id,
2162                                   "milter=%s, action=%s, skip",
2163                                   m->mf_name, action);
2164                 m->mf_state = SMFS_SKIP;
2165                 break;
2166
2167           default:
2168                 /* Invalid response to command */
2169                 if (MilterLogLevel > 0)
2170                         sm_syslog(LOG_ERR, e->e_id,
2171                                   "milter_send_command(%s): action=%s returned bogus response %c",
2172                                   m->mf_name, action, rcmd);
2173                 milter_error(m, e);
2174                 break;
2175         }
2176
2177         if (*state != SMFIR_REPLYCODE && response != NULL)
2178         {
2179                 sm_free(response); /* XXX */
2180                 response = NULL;
2181         }
2182         return response;
2183 }
2184
2185 /*
2186 **  MILTER_COMMAND -- send a command and return the response for each filter
2187 **
2188 **      Parameters:
2189 **              cmd -- command to send.
2190 **              data -- optional command data.
2191 **              sz -- length of buf.
2192 **              macros -- macros to send for filter smfi_getsymval().
2193 **              e -- current envelope (for macro access).
2194 **              state -- return state word.
2195 **              where -- description of calling function (logging).
2196 **              cmd_error -- did the SMTP command cause an error?
2197 **
2198 **      Returns:
2199 **              response string (may be NULL)
2200 */
2201
2202 static char *
2203 milter_command(cmd, data, sz, macros, e, state, where, cmd_error)
2204         int cmd;
2205         void *data;
2206         ssize_t sz;
2207         char **macros;
2208         ENVELOPE *e;
2209         char *state;
2210         const char *where;
2211         bool cmd_error;
2212 {
2213         int i;
2214         char command = (char) cmd;
2215         char *response = NULL;
2216         time_t tn = 0;
2217
2218         if (tTd(64, 10))
2219                 sm_dprintf("milter_command: cmd %c len %ld\n",
2220                         command, (long) sz);
2221
2222         *state = SMFIR_CONTINUE;
2223         for (i = 0; InputFilters[i] != NULL; i++)
2224         {
2225                 struct milter *m = InputFilters[i];
2226
2227                 /* previous problem? */
2228                 if (m->mf_state == SMFS_ERROR)
2229                 {
2230                         MILTER_CHECK_ERROR(false, continue);
2231                         break;
2232                 }
2233
2234                 /* sanity check */
2235                 if (m->mf_sock < 0 ||
2236                     (m->mf_state != SMFS_OPEN && m->mf_state != SMFS_INMSG))
2237                         continue;
2238
2239                 /* send macros (regardless of whether we send command) */
2240                 if (macros != NULL && macros[0] != NULL)
2241                 {
2242                         milter_send_macros(m, macros, command, e);
2243                         if (m->mf_state == SMFS_ERROR)
2244                         {
2245                                 MILTER_CHECK_ERROR(false, continue);
2246                                 break;
2247                         }
2248                 }
2249
2250                 if (MilterLogLevel > 21)
2251                         tn = curtime();
2252
2253                 /*
2254                 **  send the command if
2255                 **      there is no error
2256                 **      or it's RCPT and the client asked for it:
2257                 **      !cmd_error ||
2258                 **      where == "rcpt" && m->mf_pflags & SMFIP_RCPT_REJ != 0
2259                 **  negate that condition and use continue
2260                 */
2261
2262                 if (cmd_error &&
2263                     (strcmp(where, "rcpt") != 0 ||
2264                      (m->mf_pflags & SMFIP_RCPT_REJ) == 0))
2265                         continue;
2266
2267                 response = milter_send_command(m, command, data, sz, e, state,
2268                                                 where);
2269
2270                 if (MilterLogLevel > 21)
2271                 {
2272                         /* log the time it took for the command per filter */
2273                         sm_syslog(LOG_INFO, e->e_id,
2274                                   "Milter (%s): time command (%c), %d",
2275                                   m->mf_name, command, (int) (tn - curtime()));
2276                 }
2277
2278                 if (*state != SMFIR_CONTINUE)
2279                         break;
2280         }
2281         return response;
2282 }
2283
2284 static int milter_getsymlist __P((struct milter *, char *, int, int));
2285
2286 static int
2287 milter_getsymlist(m, buf, rlen, offset)
2288         struct milter *m;
2289         char *buf;
2290         int rlen;
2291         int offset;
2292 {
2293         int i, r, nummac;
2294         mi_int32 v;
2295
2296         SM_ASSERT(m != NULL);
2297         SM_ASSERT(buf != NULL);
2298
2299         while (offset + MILTER_LEN_BYTES < rlen)
2300         {
2301                 size_t len;
2302                 char **macros;
2303
2304                 nummac = 0;
2305                 (void) memcpy((char *) &v, buf + offset, MILTER_LEN_BYTES);
2306                 i = ntohl(v);
2307                 if (i < SMFIM_FIRST || i > SMFIM_LAST)
2308                         return -1;
2309                 offset += MILTER_LEN_BYTES;
2310                 macros = NULL;
2311
2312                 switch (i)
2313                 {
2314                   case MO_MACROS_CONNECT:
2315                         if (macros == NULL)
2316                                 macros = MilterConnectMacros;
2317                         /* FALLTHROUGH */
2318
2319                   case MO_MACROS_HELO:
2320                         if (macros == NULL)
2321                                 macros = MilterHeloMacros;
2322                         /* FALLTHROUGH */
2323
2324                   case MO_MACROS_ENVFROM:
2325                         if (macros == NULL)
2326                                 macros = MilterEnvFromMacros;
2327                         /* FALLTHROUGH */
2328
2329                   case MO_MACROS_ENVRCPT:
2330                         if (macros == NULL)
2331                                 macros = MilterEnvRcptMacros;
2332                         /* FALLTHROUGH */
2333
2334                   case MO_MACROS_EOM:
2335                         if (macros == NULL)
2336                                 macros = MilterEOMMacros;
2337                         /* FALLTHROUGH */
2338
2339                   case MO_MACROS_EOH:
2340                         if (macros == NULL)
2341                                 macros = MilterEOHMacros;
2342                         /* FALLTHROUGH */
2343
2344                   case MO_MACROS_DATA:
2345                         if (macros == NULL)
2346                                 macros = MilterDataMacros;
2347
2348                         len = strlen(buf + offset);
2349                         if (len > 0)
2350                         {
2351                                 r = milter_set_macros(m->mf_name, macros,
2352                                                 buf + offset, nummac);
2353                                 if (r >= 0)
2354                                         nummac = r;
2355                         }
2356                         break;
2357
2358                   default:
2359                         return -1;
2360                 }
2361                 if (len == 0)
2362                         return -1;
2363                 offset += len + 1;
2364         }
2365
2366         return 0;
2367 }
2368
2369 /*
2370 **  MILTER_NEGOTIATE -- get version and flags from filter
2371 **
2372 **      Parameters:
2373 **              m -- milter filter structure.
2374 **              e -- current envelope.
2375 **              milters -- milters structure.
2376 **
2377 **      Returns:
2378 **              0 on success, -1 otherwise
2379 */
2380
2381 static int
2382 milter_negotiate(m, e, milters)
2383         struct milter *m;
2384         ENVELOPE *e;
2385         milters_T *milters;
2386 {
2387         char rcmd;
2388         mi_int32 fvers, fflags, pflags;
2389         mi_int32 mta_prot_vers, mta_prot_flags, mta_actions;
2390         ssize_t rlen;
2391         char *response;
2392         char data[MILTER_OPTLEN];
2393
2394         /* sanity check */
2395         if (m->mf_sock < 0 || m->mf_state != SMFS_OPEN)
2396         {
2397                 if (MilterLogLevel > 0)
2398                         sm_syslog(LOG_ERR, e->e_id,
2399                                   "Milter (%s): negotiate, impossible state",
2400                                   m->mf_name);
2401                 milter_error(m, e);
2402                 return -1;
2403         }
2404
2405 #if _FFR_MILTER_CHECK
2406         mta_prot_vers = m->mf_mta_prot_version;
2407         mta_prot_flags = m->mf_mta_prot_flags;
2408         mta_actions = m->mf_mta_actions;
2409 #else /* _FFR_MILTER_CHECK */
2410         mta_prot_vers = SMFI_PROT_VERSION;
2411         mta_prot_flags = SMFI_CURR_PROT;
2412         mta_actions = SMFI_CURR_ACTS;
2413 #endif /* _FFR_MILTER_CHECK */
2414
2415         fvers = htonl(mta_prot_vers);
2416         pflags = htonl(mta_prot_flags);
2417         fflags = htonl(mta_actions);
2418         (void) memcpy(data, (char *) &fvers, MILTER_LEN_BYTES);
2419         (void) memcpy(data + MILTER_LEN_BYTES,
2420                       (char *) &fflags, MILTER_LEN_BYTES);
2421         (void) memcpy(data + (MILTER_LEN_BYTES * 2),
2422                       (char *) &pflags, MILTER_LEN_BYTES);
2423         (void) milter_write(m, SMFIC_OPTNEG, data, sizeof(data),
2424                             m->mf_timeout[SMFTO_WRITE], e, "negotiate");
2425
2426         if (m->mf_state == SMFS_ERROR)
2427                 return -1;
2428
2429         if (tTd(64, 5))
2430                 sm_dprintf("milter_negotiate(%s): send: version %lu, fflags 0x%lx, pflags 0x%lx\n",
2431                         m->mf_name, ntohl(fvers), ntohl(fflags), ntohl(pflags));
2432
2433         response = milter_read(m, &rcmd, &rlen, m->mf_timeout[SMFTO_READ], e,
2434                                 "negotiate");
2435         if (m->mf_state == SMFS_ERROR)
2436                 return -1;
2437
2438         if (rcmd != SMFIC_OPTNEG)
2439         {
2440                 if (tTd(64, 5))
2441                         sm_dprintf("milter_negotiate(%s): returned %c instead of %c\n",
2442                                 m->mf_name, rcmd, SMFIC_OPTNEG);
2443                 if (MilterLogLevel > 0)
2444                         sm_syslog(LOG_ERR, e->e_id,
2445                                   "Milter (%s): negotiate: returned %c instead of %c",
2446                                   m->mf_name, rcmd, SMFIC_OPTNEG);
2447                 if (response != NULL)
2448                         sm_free(response); /* XXX */
2449                 milter_error(m, e);
2450                 return -1;
2451         }
2452
2453         /* Make sure we have enough bytes for the version */
2454         if (response == NULL || rlen < MILTER_LEN_BYTES)
2455         {
2456                 if (tTd(64, 5))
2457                         sm_dprintf("milter_negotiate(%s): did not return valid info\n",
2458                                 m->mf_name);
2459                 if (MilterLogLevel > 0)
2460                         sm_syslog(LOG_ERR, e->e_id,
2461                                   "Milter (%s): negotiate: did not return valid info",
2462                                   m->mf_name);
2463                 if (response != NULL)
2464                         sm_free(response); /* XXX */
2465                 milter_error(m, e);
2466                 return -1;
2467         }
2468
2469         /* extract information */
2470         (void) memcpy((char *) &fvers, response, MILTER_LEN_BYTES);
2471
2472         /* Now make sure we have enough for the feature bitmap */
2473         if (rlen < MILTER_OPTLEN)
2474         {
2475                 if (tTd(64, 5))
2476                         sm_dprintf("milter_negotiate(%s): did not return enough info\n",
2477                                 m->mf_name);
2478                 if (MilterLogLevel > 0)
2479                         sm_syslog(LOG_ERR, e->e_id,
2480                                   "Milter (%s): negotiate: did not return enough info",
2481                                   m->mf_name);
2482                 if (response != NULL)
2483                         sm_free(response); /* XXX */
2484                 milter_error(m, e);
2485                 return -1;
2486         }
2487
2488         (void) memcpy((char *) &fflags, response + MILTER_LEN_BYTES,
2489                       MILTER_LEN_BYTES);
2490         (void) memcpy((char *) &pflags, response + (MILTER_LEN_BYTES * 2),
2491                       MILTER_LEN_BYTES);
2492
2493         m->mf_fvers = ntohl(fvers);
2494         m->mf_fflags = ntohl(fflags);
2495         m->mf_pflags = ntohl(pflags);
2496
2497         /* check for version compatibility */
2498         if (m->mf_fvers == 1 ||
2499             m->mf_fvers > SMFI_VERSION)
2500         {
2501                 if (tTd(64, 5))
2502                         sm_dprintf("milter_negotiate(%s): version %d != MTA milter version %d\n",
2503                                 m->mf_name, m->mf_fvers, SMFI_VERSION);
2504                 if (MilterLogLevel > 0)
2505                         sm_syslog(LOG_ERR, e->e_id,
2506                                   "Milter (%s): negotiate: version %d != MTA milter version %d",
2507                                   m->mf_name, m->mf_fvers, SMFI_VERSION);
2508                 milter_error(m, e);
2509                 goto error;
2510         }
2511
2512         /* check for filter feature mismatch */
2513         if ((m->mf_fflags & mta_actions) != m->mf_fflags)
2514         {
2515                 if (tTd(64, 5))
2516                         sm_dprintf("milter_negotiate(%s): filter abilities 0x%x != MTA milter abilities 0x%lx\n",
2517                                 m->mf_name, m->mf_fflags,
2518                                 (unsigned long) mta_actions);
2519                 if (MilterLogLevel > 0)
2520                         sm_syslog(LOG_ERR, e->e_id,
2521                                   "Milter (%s): negotiate: filter abilities 0x%x != MTA milter abilities 0x%lx",
2522                                   m->mf_name, m->mf_fflags,
2523                                   (unsigned long) mta_actions);
2524                 milter_error(m, e);
2525                 goto error;
2526         }
2527
2528         /* check for protocol feature mismatch */
2529         if ((m->mf_pflags & mta_prot_flags) != m->mf_pflags)
2530         {
2531                 if (tTd(64, 5))
2532                         sm_dprintf("milter_negotiate(%s): protocol abilities 0x%x != MTA milter abilities 0x%lx\n",
2533                                 m->mf_name, m->mf_pflags,
2534                                 (unsigned long) mta_prot_flags);
2535                 if (MilterLogLevel > 0)
2536                         sm_syslog(LOG_ERR, e->e_id,
2537                                   "Milter (%s): negotiate: protocol abilities 0x%x != MTA milter abilities 0x%lx",
2538                                   m->mf_name, m->mf_pflags,
2539                                   (unsigned long) mta_prot_flags);
2540                 milter_error(m, e);
2541                 goto error;
2542         }
2543
2544         if (m->mf_fvers <= 2)
2545                 m->mf_pflags |= SMFIP_NOUNKNOWN;
2546         if (m->mf_fvers <= 3)
2547                 m->mf_pflags |= SMFIP_NODATA;
2548
2549         if (rlen > MILTER_OPTLEN)
2550         {
2551                 milter_getsymlist(m, response, rlen, MILTER_OPTLEN);
2552         }
2553
2554         if (bitset(SMFIF_DELRCPT, m->mf_fflags))
2555                 milters->mis_flags |= MIS_FL_DEL_RCPT;
2556         if (!bitset(SMFIP_NORCPT, m->mf_pflags) &&
2557             !bitset(SMFIP_NR_RCPT, m->mf_pflags))
2558                 milters->mis_flags |= MIS_FL_REJ_RCPT;
2559
2560         if (tTd(64, 5))
2561                 sm_dprintf("milter_negotiate(%s): received: version %u, fflags 0x%x, pflags 0x%x\n",
2562                         m->mf_name, m->mf_fvers, m->mf_fflags, m->mf_pflags);
2563         return 0;
2564
2565   error:
2566         if (response != NULL)
2567                 sm_free(response); /* XXX */
2568         return -1;
2569 }
2570
2571 /*
2572 **  MILTER_PER_CONNECTION_CHECK -- checks on per-connection commands
2573 **
2574 **      Reduce code duplication by putting these checks in one place
2575 **
2576 **      Parameters:
2577 **              e -- current envelope.
2578 **
2579 **      Returns:
2580 **              none
2581 */
2582
2583 static void
2584 milter_per_connection_check(e)
2585         ENVELOPE *e;
2586 {
2587         int i;
2588
2589         /* see if we are done with any of the filters */
2590         for (i = 0; InputFilters[i] != NULL; i++)
2591         {
2592                 struct milter *m = InputFilters[i];
2593
2594                 if (m->mf_state == SMFS_CLOSABLE)
2595                         milter_quit_filter(m, e);
2596         }
2597 }
2598
2599 /*
2600 **  MILTER_ERROR -- Put a milter filter into error state
2601 **
2602 **      Parameters:
2603 **              m -- the broken filter.
2604 **              e -- current envelope.
2605 **
2606 **      Returns:
2607 **              none
2608 */
2609
2610 static void
2611 milter_error(m, e)
2612         struct milter *m;
2613         ENVELOPE *e;
2614 {
2615         /*
2616         **  We could send a quit here but we may have gotten here due to
2617         **  an I/O error so we don't want to try to make things worse.
2618         */
2619
2620         if (m->mf_sock >= 0)
2621         {
2622                 (void) close(m->mf_sock);
2623                 m->mf_sock = -1;
2624         }
2625         m->mf_state = SMFS_ERROR;
2626
2627         if (MilterLogLevel > 0)
2628                 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): to error state",
2629                           m->mf_name);
2630 }
2631
2632 /*
2633 **  MILTER_HEADERS -- send headers to a single milter filter
2634 **
2635 **      Parameters:
2636 **              m -- current filter.
2637 **              e -- current envelope.
2638 **              state -- return state from response.
2639 **
2640 **      Returns:
2641 **              response string (may be NULL)
2642 */
2643
2644 static char *
2645 milter_headers(m, e, state)
2646         struct milter *m;
2647         ENVELOPE *e;
2648         char *state;
2649 {
2650         char *response = NULL;
2651         HDR *h;
2652
2653         if (MilterLogLevel > 17)
2654                 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): headers, send",
2655                           m->mf_name);
2656
2657         for (h = e->e_header; h != NULL; h = h->h_link)
2658         {
2659                 int len_n, len_v, len_t, len_f;
2660                 char *buf, *hv;
2661
2662                 /* don't send over deleted headers */
2663                 if (h->h_value == NULL)
2664                 {
2665                         /* strip H_USER so not counted in milter_changeheader() */
2666                         h->h_flags &= ~H_USER;
2667                         continue;
2668                 }
2669
2670                 /* skip auto-generated */
2671                 if (!bitset(H_USER, h->h_flags))
2672                         continue;
2673
2674                 if (tTd(64, 10))
2675                         sm_dprintf("milter_headers: %s:%s\n",
2676                                 h->h_field, h->h_value);
2677                 if (MilterLogLevel > 21)
2678                         sm_syslog(LOG_INFO, e->e_id, "Milter (%s): header, %s",
2679                                   m->mf_name, h->h_field);
2680
2681                 if (bitset(SMFIP_HDR_LEADSPC, m->mf_pflags)
2682                     || *(h->h_value) != ' ')
2683                         hv = h->h_value;
2684                 else
2685                         hv = h->h_value + 1;
2686                 len_f = strlen(h->h_field) + 1;
2687                 len_t = len_f + strlen(hv) + 1;
2688                 if (len_t < 0)
2689                         continue;
2690                 buf = (char *) xalloc(len_t);
2691
2692                 /*
2693                 **  Note: currently the call to dequote_internal_chars()
2694                 **  is not required as h_field is supposed to be 7-bit US-ASCII.
2695                 */
2696
2697                 len_n = dequote_internal_chars(h->h_field, buf, len_f);
2698                 SM_ASSERT(len_n < len_f);
2699                 len_v = dequote_internal_chars(hv, buf + len_n + 1,
2700                                                 len_t - len_n - 1);
2701                 SM_ASSERT(len_t >= len_n + 1 + len_v + 1);
2702                 len_t = len_n + 1 + len_v + 1;
2703
2704                 /* send it over */
2705                 response = milter_send_command(m, SMFIC_HEADER, buf,
2706                                                len_t, e, state, "header");
2707                 sm_free(buf);
2708                 if (m->mf_state == SMFS_ERROR ||
2709                     m->mf_state == SMFS_DONE ||
2710                     *state != SMFIR_CONTINUE)
2711                         break;
2712         }
2713         if (MilterLogLevel > 17)
2714                 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): headers, sent",
2715                           m->mf_name);
2716         return response;
2717 }
2718
2719 /*
2720 **  MILTER_BODY -- send the body to a filter
2721 **
2722 **      Parameters:
2723 **              m -- current filter.
2724 **              e -- current envelope.
2725 **              state -- return state from response.
2726 **
2727 **      Returns:
2728 **              response string (may be NULL)
2729 */
2730
2731 static char *
2732 milter_body(m, e, state)
2733         struct milter *m;
2734         ENVELOPE *e;
2735         char *state;
2736 {
2737         char bufchar = '\0';
2738         char prevchar = '\0';
2739         int c;
2740         char *response = NULL;
2741         char *bp;
2742         char buf[MILTER_CHUNK_SIZE];
2743
2744         if (tTd(64, 10))
2745                 sm_dprintf("milter_body\n");
2746
2747         if (bfrewind(e->e_dfp) < 0)
2748         {
2749                 ExitStat = EX_IOERR;
2750                 *state = SMFIR_TEMPFAIL;
2751                 syserr("milter_body: %s/%cf%s: rewind error",
2752                        qid_printqueue(e->e_qgrp, e->e_qdir),
2753                        DATAFL_LETTER, e->e_id);
2754                 return NULL;
2755         }
2756
2757         if (MilterLogLevel > 17)
2758                 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): body, send",
2759                           m->mf_name);
2760         bp = buf;
2761         while ((c = sm_io_getc(e->e_dfp, SM_TIME_DEFAULT)) != SM_IO_EOF)
2762         {
2763                 /*  Change LF to CRLF */
2764                 if (c == '\n')
2765                 {
2766 #if !_FFR_MILTER_CONVERT_ALL_LF_TO_CRLF
2767                         /* Not a CRLF already? */
2768                         if (prevchar != '\r')
2769 #endif /* !_FFR_MILTER_CONVERT_ALL_LF_TO_CRLF */
2770                         {
2771                                 /* Room for CR now? */
2772                                 if (bp + 2 > &buf[sizeof(buf)])
2773                                 {
2774                                         /* No room, buffer LF */
2775                                         bufchar = c;
2776
2777                                         /* and send CR now */
2778                                         c = '\r';
2779                                 }
2780                                 else
2781                                 {
2782                                         /* Room to do it now */
2783                                         *bp++ = '\r';
2784                                         prevchar = '\r';
2785                                 }
2786                         }
2787                 }
2788                 *bp++ = (char) c;
2789                 prevchar = c;
2790                 if (bp >= &buf[sizeof(buf)])
2791                 {
2792                         /* send chunk */
2793                         response = milter_send_command(m, SMFIC_BODY, buf,
2794                                                        bp - buf, e, state,
2795                                                         "body chunk");
2796                         bp = buf;
2797                         if (bufchar != '\0')
2798                         {
2799                                 *bp++ = bufchar;
2800                                 bufchar = '\0';
2801                                 prevchar = bufchar;
2802                         }
2803                 }
2804                 if (m->mf_state == SMFS_ERROR ||
2805                     m->mf_state == SMFS_DONE ||
2806                     m->mf_state == SMFS_SKIP ||
2807                     *state != SMFIR_CONTINUE)
2808                         break;
2809         }
2810
2811         /* check for read errors */
2812         if (sm_io_error(e->e_dfp))
2813         {
2814                 ExitStat = EX_IOERR;
2815                 if (*state == SMFIR_CONTINUE ||
2816                     *state == SMFIR_ACCEPT ||
2817                     m->mf_state == SMFS_SKIP)
2818                 {
2819                         *state = SMFIR_TEMPFAIL;
2820                         if (response != NULL)
2821                         {
2822                                 sm_free(response); /* XXX */
2823                                 response = NULL;
2824                         }
2825                 }
2826                 syserr("milter_body: %s/%cf%s: read error",
2827                        qid_printqueue(e->e_qgrp, e->e_qdir),
2828                        DATAFL_LETTER, e->e_id);
2829                 return response;
2830         }
2831
2832         /* send last body chunk */
2833         if (bp > buf &&
2834             m->mf_state != SMFS_ERROR &&
2835             m->mf_state != SMFS_DONE &&
2836             m->mf_state != SMFS_SKIP &&
2837             *state == SMFIR_CONTINUE)
2838         {
2839                 /* send chunk */
2840                 response = milter_send_command(m, SMFIC_BODY, buf, bp - buf,
2841                                                e, state, "last body chunk");
2842                 bp = buf;
2843         }
2844         if (MilterLogLevel > 17)
2845                 sm_syslog(LOG_INFO, e->e_id, "Milter (%s): body, sent",
2846                           m->mf_name);
2847         if (m->mf_state == SMFS_SKIP)
2848         {
2849                 *state = SMFIR_CONTINUE;
2850                 m->mf_state = SMFS_READY;
2851         }
2852
2853         return response;
2854 }
2855
2856 /*
2857 **  Actions
2858 */
2859
2860 /*
2861 **  ADDLEADINGSPACE -- Add a leading space to a string
2862 **
2863 **      Parameters:
2864 **              str -- string
2865 **              rp -- resource pool for allocations
2866 **
2867 **      Returns:
2868 **              pointer to new string
2869 */
2870
2871 static char *addleadingspace __P((char *, SM_RPOOL_T *));
2872
2873 static char *
2874 addleadingspace(str, rp)
2875         char *str;
2876         SM_RPOOL_T *rp;
2877 {
2878         size_t l;
2879         char *new;
2880
2881         SM_ASSERT(str != NULL);
2882         l = strlen(str);
2883         SM_ASSERT(l + 2 > l);
2884         new = sm_rpool_malloc_x(rp, l + 2);
2885         new[0] = ' ';
2886         new[1] = '\0';
2887         sm_strlcpy(new + 1, str, l + 1);
2888         return new;
2889 }
2890
2891 /*
2892 **  MILTER_ADDHEADER -- Add the supplied header to the message
2893 **
2894 **      Parameters:
2895 **              m -- current filter.
2896 **              response -- encoded form of header/value.
2897 **              rlen -- length of response.
2898 **              e -- current envelope.
2899 **
2900 **      Returns:
2901 **              none
2902 */
2903
2904 static void
2905 milter_addheader(m, response, rlen, e)
2906         struct milter *m;
2907         char *response;
2908         ssize_t rlen;
2909         ENVELOPE *e;
2910 {
2911         int mh_v_len;
2912         char *val, *mh_value;
2913         HDR *h;
2914
2915         if (tTd(64, 10))
2916                 sm_dprintf("milter_addheader: ");
2917
2918         /* sanity checks */
2919         if (response == NULL)
2920         {
2921                 if (tTd(64, 10))
2922                         sm_dprintf("NULL response\n");
2923                 return;
2924         }
2925
2926         if (rlen < 2 || strlen(response) + 1 >= (size_t) rlen)
2927         {
2928                 if (tTd(64, 10))
2929                         sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
2930                                    (int) strlen(response), (int) (rlen - 1));
2931                 return;
2932         }
2933
2934         /* Find separating NUL */
2935         val = response + strlen(response) + 1;
2936
2937         /* another sanity check */
2938         if (strlen(response) + strlen(val) + 2 != (size_t) rlen)
2939         {
2940                 if (tTd(64, 10))
2941                         sm_dprintf("didn't follow protocol (part len)\n");
2942                 return;
2943         }
2944
2945         if (*response == '\0')
2946         {
2947                 if (tTd(64, 10))
2948                         sm_dprintf("empty field name\n");
2949                 return;
2950         }
2951
2952         for (h = e->e_header; h != NULL; h = h->h_link)
2953         {
2954                 if (sm_strcasecmp(h->h_field, response) == 0 &&
2955                     !bitset(H_USER, h->h_flags) &&
2956                     !bitset(H_TRACE, h->h_flags))
2957                         break;
2958         }
2959
2960         mh_v_len = 0;
2961         mh_value = quote_internal_chars(val, NULL, &mh_v_len);
2962
2963         /* add to e_msgsize */
2964         e->e_msgsize += strlen(response) + 2 + strlen(val);
2965
2966         if (h != NULL)
2967         {
2968                 if (tTd(64, 10))
2969                         sm_dprintf("Replace default header %s value with %s\n",
2970                                    h->h_field, mh_value);
2971                 if (MilterLogLevel > 8)
2972                         sm_syslog(LOG_INFO, e->e_id,
2973                                   "Milter change: default header %s value with %s",
2974                                   h->h_field, mh_value);
2975                 if (bitset(SMFIP_HDR_LEADSPC, m->mf_pflags))
2976                         h->h_value = mh_value;
2977                 else
2978                 {
2979                         h->h_value = addleadingspace (mh_value, e->e_rpool);
2980                         SM_FREE(mh_value);
2981                 }
2982                 h->h_flags |= H_USER;
2983         }
2984         else
2985         {
2986                 if (tTd(64, 10))
2987                         sm_dprintf("Add %s: %s\n", response, mh_value);
2988                 if (MilterLogLevel > 8)
2989                         sm_syslog(LOG_INFO, e->e_id,
2990                                   "Milter add: header: %s: %s",
2991                                   response, mh_value);
2992                 addheader(newstr(response), mh_value, H_USER, e,
2993                         !bitset(SMFIP_HDR_LEADSPC, m->mf_pflags));
2994                 SM_FREE(mh_value);
2995         }
2996 }
2997
2998 /*
2999 **  MILTER_INSHEADER -- Insert the supplied header
3000 **
3001 **      Parameters:
3002 **              m -- current filter.
3003 **              response -- encoded form of header/value.
3004 **              rlen -- length of response.
3005 **              e -- current envelope.
3006 **
3007 **      Returns:
3008 **              none
3009 **
3010 **      Notes:
3011 **              Unlike milter_addheader(), this does not attempt to determine
3012 **              if the header already exists in the envelope, even a
3013 **              deleted version.  It just blindly inserts.
3014 */
3015
3016 static void
3017 milter_insheader(m, response, rlen, e)
3018         struct milter *m;
3019         char *response;
3020         ssize_t rlen;
3021         ENVELOPE *e;
3022 {
3023         mi_int32 idx, i;
3024         int mh_v_len;
3025         char *field, *val, *mh_value;
3026
3027         if (tTd(64, 10))
3028                 sm_dprintf("milter_insheader: ");
3029
3030         /* sanity checks */
3031         if (response == NULL)
3032         {
3033                 if (tTd(64, 10))
3034                         sm_dprintf("NULL response\n");
3035                 return;
3036         }
3037
3038         if (rlen < 2 || strlen(response) + 1 >= (size_t) rlen)
3039         {
3040                 if (tTd(64, 10))
3041                         sm_dprintf("didn't follow protocol (total len)\n");
3042                 return;
3043         }
3044
3045         /* decode */
3046         (void) memcpy((char *) &i, response, MILTER_LEN_BYTES);
3047         idx = ntohl(i);
3048         field = response + MILTER_LEN_BYTES;
3049         val = field + strlen(field) + 1;
3050
3051         /* another sanity check */
3052         if (MILTER_LEN_BYTES + strlen(field) + 1 +
3053             strlen(val) + 1 != (size_t) rlen)
3054         {
3055                 if (tTd(64, 10))
3056                         sm_dprintf("didn't follow protocol (part len)\n");
3057                 return;
3058         }
3059
3060         if (*field == '\0')
3061         {
3062                 if (tTd(64, 10))
3063                         sm_dprintf("empty field name\n");
3064                 return;
3065         }
3066
3067         /* add to e_msgsize */
3068         e->e_msgsize += strlen(response) + 2 + strlen(val);
3069
3070         if (tTd(64, 10))
3071                 sm_dprintf("Insert (%d) %s: %s\n", idx, field, val);
3072         if (MilterLogLevel > 8)
3073                 sm_syslog(LOG_INFO, e->e_id,
3074                           "Milter insert (%d): header: %s: %s",
3075                           idx, field, val);
3076         mh_v_len = 0;
3077         mh_value = quote_internal_chars(val, NULL, &mh_v_len);
3078         insheader(idx, newstr(field), mh_value, H_USER, e,
3079                 !bitset(SMFIP_HDR_LEADSPC, m->mf_pflags));
3080         SM_FREE(mh_value);
3081 }
3082
3083 /*
3084 **  MILTER_CHANGEHEADER -- Change the supplied header in the message
3085 **
3086 **      Parameters:
3087 **              m -- current filter.
3088 **              response -- encoded form of header/index/value.
3089 **              rlen -- length of response.
3090 **              e -- current envelope.
3091 **
3092 **      Returns:
3093 **              none
3094 */
3095
3096 static void
3097 milter_changeheader(m, response, rlen, e)
3098         struct milter *m;
3099         char *response;
3100         ssize_t rlen;
3101         ENVELOPE *e;
3102 {
3103         mi_int32 i, index;
3104         int mh_v_len;
3105         char *field, *val, *mh_value;
3106         HDR *h, *sysheader;
3107
3108         if (tTd(64, 10))
3109                 sm_dprintf("milter_changeheader: ");
3110
3111         /* sanity checks */
3112         if (response == NULL)
3113         {
3114                 if (tTd(64, 10))
3115                         sm_dprintf("NULL response\n");
3116                 return;
3117         }
3118
3119         if (rlen < 2 || strlen(response) + 1 >= (size_t) rlen)
3120         {
3121                 if (tTd(64, 10))
3122                         sm_dprintf("didn't follow protocol (total len)\n");
3123                 return;
3124         }
3125
3126         /* Find separating NUL */
3127         (void) memcpy((char *) &i, response, MILTER_LEN_BYTES);
3128         index = ntohl(i);
3129         field = response + MILTER_LEN_BYTES;
3130         val = field + strlen(field) + 1;
3131
3132         /* another sanity check */
3133         if (MILTER_LEN_BYTES + strlen(field) + 1 +
3134             strlen(val) + 1 != (size_t) rlen)
3135         {
3136                 if (tTd(64, 10))
3137                         sm_dprintf("didn't follow protocol (part len)\n");
3138                 return;
3139         }
3140
3141         if (*field == '\0')
3142         {
3143                 if (tTd(64, 10))
3144                         sm_dprintf("empty field name\n");
3145                 return;
3146         }
3147
3148         mh_v_len = 0;
3149         mh_value = quote_internal_chars(val, NULL, &mh_v_len);
3150
3151         sysheader = NULL;
3152         for (h = e->e_header; h != NULL; h = h->h_link)
3153         {
3154                 if (sm_strcasecmp(h->h_field, field) == 0)
3155                 {
3156                         if (bitset(H_USER, h->h_flags) && --index <= 0)
3157                         {
3158                                 sysheader = NULL;
3159                                 break;
3160                         }
3161                         else if (!bitset(H_USER, h->h_flags) &&
3162                                  !bitset(H_TRACE, h->h_flags))
3163                         {
3164                                 /*
3165                                 **  DRUMS msg-fmt draft says can only have
3166                                 **  multiple occurences of trace fields,
3167                                 **  so make sure we replace any non-trace,
3168                                 **  non-user field.
3169                                 */
3170
3171                                 sysheader = h;
3172                         }
3173                 }
3174         }
3175
3176         /* if not found as user-provided header at index, use sysheader */
3177         if (h == NULL)
3178                 h = sysheader;
3179
3180         if (h == NULL)
3181         {
3182                 if (*val == '\0')
3183                 {
3184                         if (tTd(64, 10))
3185                                 sm_dprintf("Delete (noop) %s\n", field);
3186                         if (MilterLogLevel > 8)
3187                                 sm_syslog(LOG_INFO, e->e_id,
3188                                         "Milter delete (noop): header: %s"
3189                                         , field);
3190                 }
3191                 else
3192                 {
3193                         /* treat modify value with no existing header as add */
3194                         if (tTd(64, 10))
3195                                 sm_dprintf("Add %s: %s\n", field, mh_value);
3196                         if (MilterLogLevel > 8)
3197                                 sm_syslog(LOG_INFO, e->e_id,
3198                                         "Milter change (add): header: %s: %s"
3199                                         , field, mh_value);
3200                         addheader(newstr(field), mh_value, H_USER, e,
3201                                 !bitset(SMFIP_HDR_LEADSPC, m->mf_pflags));
3202                 }
3203                 return;
3204         }
3205
3206         if (tTd(64, 10))
3207         {
3208                 if (*val == '\0')
3209                 {
3210                         sm_dprintf("Delete%s %s:%s\n",
3211                                    h == sysheader ? " (default header)" : "",
3212                                    field,
3213                                    h->h_value == NULL ? "<NULL>" : h->h_value);
3214                 }
3215                 else
3216                 {
3217                         sm_dprintf("Change%s %s: from %s to %s\n",
3218                                    h == sysheader ? " (default header)" : "",
3219                                    field,
3220                                    h->h_value == NULL ? "<NULL>" : h->h_value,
3221                                    mh_value);
3222                 }
3223         }
3224
3225         if (MilterLogLevel > 8)
3226         {
3227                 if (*val == '\0')
3228                 {
3229                         sm_syslog(LOG_INFO, e->e_id,
3230                                   "Milter delete: header%s %s:%s",
3231                                   h == sysheader ? " (default header)" : "",
3232                                   field,
3233                                   h->h_value == NULL ? "<NULL>" : h->h_value);
3234                 }
3235                 else
3236                 {
3237                         sm_syslog(LOG_INFO, e->e_id,
3238                                   "Milter change: header%s %s: from %s to %s",
3239                                   h == sysheader ? " (default header)" : "",
3240                                   field,
3241                                   h->h_value == NULL ? "<NULL>" : h->h_value,
3242                                   mh_value);
3243                 }
3244         }
3245
3246         if (h != sysheader && h->h_value != NULL)
3247         {
3248                 size_t l;
3249
3250                 l = strlen(h->h_value);
3251                 if (l > e->e_msgsize)
3252                         e->e_msgsize = 0;
3253                 else
3254                         e->e_msgsize -= l;
3255                 /* rpool, don't free: sm_free(h->h_value); XXX */
3256         }
3257
3258         if (*val == '\0')
3259         {
3260                 /* Remove "Field: " from message size */
3261                 if (h != sysheader)
3262                 {
3263                         size_t l;
3264
3265                         l = strlen(h->h_field) + 2;
3266                         if (l > e->e_msgsize)
3267                                 e->e_msgsize = 0;
3268                         else
3269                                 e->e_msgsize -= l;
3270                 }
3271                 h->h_value = NULL;
3272                 SM_FREE(mh_value);
3273         }
3274         else
3275         {
3276                 if (bitset(SMFIP_HDR_LEADSPC, m->mf_pflags))
3277                         h->h_value = mh_value;
3278                 else
3279                 {
3280                         h->h_value = addleadingspace (mh_value, e->e_rpool);
3281                         SM_FREE(mh_value);
3282                 }
3283                 h->h_flags |= H_USER;
3284                 e->e_msgsize += strlen(h->h_value);
3285         }
3286 }
3287
3288 /*
3289 **  MILTER_SPLIT_RESPONSE -- Split response into fields.
3290 **
3291 **      Parameters:
3292 **              response -- encoded repsonse.
3293 **              rlen -- length of response.
3294 **              pargc -- number of arguments (ouput)
3295 **
3296 **      Returns:
3297 **              array of pointers to the individual strings
3298 */
3299
3300 static char **milter_split_response __P((char *, ssize_t, int *));
3301
3302 static char **
3303 milter_split_response(response, rlen, pargc)
3304         char *response;
3305         ssize_t rlen;
3306         int *pargc;
3307 {
3308         char **s;
3309         size_t i;
3310         int elem, nelem;
3311
3312         SM_ASSERT(response != NULL);
3313         SM_ASSERT(pargc != NULL);
3314         *pargc = 0;
3315         if (rlen < 2 || strlen(response) >= (size_t) rlen)
3316         {
3317                 if (tTd(64, 10))
3318                         sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
3319                                    (int) strlen(response), (int) (rlen - 1));
3320                 return NULL;
3321         }
3322
3323         nelem = 0;
3324         for (i = 0; i < rlen; i++)
3325         {
3326                 if (response[i] == '\0')
3327                         ++nelem;
3328         }
3329         if (nelem == 0)
3330                 return NULL;
3331
3332         /* last entry is only for the name */
3333         s = (char **)malloc(nelem * (sizeof(*s)));
3334         if (s == NULL)
3335                 return NULL;
3336         s[0] = response;
3337         for (i = 0, elem = 0; i < rlen && elem < nelem; i++)
3338         {
3339                 if (response[i] == '\0')
3340                 {
3341                         ++elem;
3342                         if (i + 1 >= rlen)
3343                                 s[elem] = NULL;
3344                         else
3345                                 s[elem] = &(response[i + 1]);
3346                 }
3347         }
3348         *pargc = nelem;
3349
3350         if (tTd(64, 10))
3351         {
3352                 for (elem = 0; elem < nelem; elem++)
3353                         sm_dprintf("argv[%d]=\"%s\"\n", elem, s[elem]);
3354         }
3355
3356         /* overwrite last entry (already done above, just paranoia) */
3357         s[elem] = NULL;
3358         return s;
3359 }
3360
3361 /*
3362 **  MILTER_CHGFROM -- Change the envelope sender address
3363 **
3364 **      Parameters:
3365 **              response -- encoded form of recipient address.
3366 **              rlen -- length of response.
3367 **              e -- current envelope.
3368 **
3369 **      Returns:
3370 **              none
3371 */
3372
3373 static void
3374 milter_chgfrom(response, rlen, e)
3375         char *response;
3376         ssize_t rlen;
3377         ENVELOPE *e;
3378 {
3379         int olderrors, argc;
3380         char **argv;
3381
3382         if (tTd(64, 10))
3383                 sm_dprintf("milter_chgfrom: ");
3384
3385         /* sanity checks */
3386         if (response == NULL)
3387         {
3388                 if (tTd(64, 10))
3389                         sm_dprintf("NULL response\n");
3390                 return;
3391         }
3392
3393         if (*response == '\0' ||
3394             strlen(response) + 1 > (size_t) rlen)
3395         {
3396                 if (tTd(64, 10))
3397                         sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
3398                                    (int) strlen(response), (int) (rlen - 1));
3399                 return;
3400         }
3401
3402         if (tTd(64, 10))
3403                 sm_dprintf("%s\n", response);
3404         if (MilterLogLevel > 8)
3405                 sm_syslog(LOG_INFO, e->e_id, "Milter chgfrom: %s", response);
3406         argv = milter_split_response(response, rlen, &argc);
3407         if (argc < 1 || argc > 2)
3408         {
3409                 if (tTd(64, 10))
3410                         sm_dprintf("didn't follow protocol argc=%d\n", argc);
3411                 return;
3412         }
3413
3414         olderrors = Errors;
3415         setsender(argv[0], e, NULL, '\0', false);
3416         if (argc == 2)
3417         {
3418                 reset_mail_esmtp_args(e);
3419
3420                 /*
3421                 **  need "features" here: how to get those? via e?
3422                 **  "fake" it for now: allow everything.
3423                 */
3424
3425                 parse_esmtp_args(e, NULL, argv[0], argv[1], "MAIL", NULL,
3426                                 mail_esmtp_args);
3427         }
3428         Errors = olderrors;
3429         return;
3430 }
3431
3432 /*
3433 **  MILTER_ADDRCPT_PAR -- Add the supplied recipient to the message
3434 **
3435 **      Parameters:
3436 **              response -- encoded form of recipient address.
3437 **              rlen -- length of response.
3438 **              e -- current envelope.
3439 **
3440 **      Returns:
3441 **              none
3442 */
3443
3444 static void
3445 milter_addrcpt_par(response, rlen, e)
3446         char *response;
3447         ssize_t rlen;
3448         ENVELOPE *e;
3449 {
3450         int olderrors, argc;
3451         char *delimptr;
3452         char **argv;
3453         ADDRESS *a;
3454
3455         if (tTd(64, 10))
3456                 sm_dprintf("milter_addrcpt_par: ");
3457
3458         /* sanity checks */
3459         if (response == NULL)
3460         {
3461                 if (tTd(64, 10))
3462                         sm_dprintf("NULL response\n");
3463                 return;
3464         }
3465
3466         if (tTd(64, 10))
3467                 sm_dprintf("%s\n", response);
3468         if (MilterLogLevel > 8)
3469                 sm_syslog(LOG_INFO, e->e_id, "Milter add: rcpt: %s", response);
3470
3471         argv = milter_split_response(response, rlen, &argc);
3472         if (argc < 1 || argc > 2)
3473         {
3474                 if (tTd(64, 10))
3475                         sm_dprintf("didn't follow protocol argc=%d\n", argc);
3476                 return;
3477         }
3478         olderrors = Errors;
3479
3480         /* how to set ESMTP arguments? */
3481         a = parseaddr(argv[0], NULLADDR, RF_COPYALL, ' ', &delimptr, e, true);
3482
3483         if (a != NULL && olderrors == Errors)
3484         {
3485                 parse_esmtp_args(e, a, argv[0], argv[1], "RCPT", NULL,
3486                                 rcpt_esmtp_args);
3487                 if (olderrors == Errors)
3488                         a = recipient(a, &e->e_sendqueue, 0, e);
3489                 else
3490                         sm_dprintf("olderrors=%d, Errors=%d\n",
3491                                 olderrors, Errors);
3492         }
3493         else
3494         {
3495                 sm_dprintf("a=%p, olderrors=%d, Errors=%d\n",
3496                         a, olderrors, Errors);
3497         }
3498
3499         Errors = olderrors;
3500         return;
3501 }
3502
3503 /*
3504 **  MILTER_ADDRCPT -- Add the supplied recipient to the message
3505 **
3506 **      Parameters:
3507 **              response -- encoded form of recipient address.
3508 **              rlen -- length of response.
3509 **              e -- current envelope.
3510 **
3511 **      Returns:
3512 **              none
3513 */
3514
3515 static void
3516 milter_addrcpt(response, rlen, e)
3517         char *response;
3518         ssize_t rlen;
3519         ENVELOPE *e;
3520 {
3521         int olderrors;
3522
3523         if (tTd(64, 10))
3524                 sm_dprintf("milter_addrcpt: ");
3525
3526         /* sanity checks */
3527         if (response == NULL)
3528         {
3529                 if (tTd(64, 10))
3530                         sm_dprintf("NULL response\n");
3531                 return;
3532         }
3533
3534         if (*response == '\0' ||
3535             strlen(response) + 1 != (size_t) rlen)
3536         {
3537                 if (tTd(64, 10))
3538                         sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
3539                                    (int) strlen(response), (int) (rlen - 1));
3540                 return;
3541         }
3542
3543         if (tTd(64, 10))
3544                 sm_dprintf("%s\n", response);
3545         if (MilterLogLevel > 8)
3546                 sm_syslog(LOG_INFO, e->e_id, "Milter add: rcpt: %s", response);
3547         olderrors = Errors;
3548         (void) sendtolist(response, NULLADDR, &e->e_sendqueue, 0, e);
3549         Errors = olderrors;
3550         return;
3551 }
3552
3553 /*
3554 **  MILTER_DELRCPT -- Delete the supplied recipient from the message
3555 **
3556 **      Parameters:
3557 **              response -- encoded form of recipient address.
3558 **              rlen -- length of response.
3559 **              e -- current envelope.
3560 **
3561 **      Returns:
3562 **              none
3563 */
3564
3565 static void
3566 milter_delrcpt(response, rlen, e)
3567         char *response;
3568         ssize_t rlen;
3569         ENVELOPE *e;
3570 {
3571         if (tTd(64, 10))
3572                 sm_dprintf("milter_delrcpt: ");
3573
3574         /* sanity checks */
3575         if (response == NULL)
3576         {
3577                 if (tTd(64, 10))
3578                         sm_dprintf("NULL response\n");
3579                 return;
3580         }
3581
3582         if (*response == '\0' ||
3583             strlen(response) + 1 != (size_t) rlen)
3584         {
3585                 if (tTd(64, 10))
3586                         sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
3587                                    (int) strlen(response), (int) (rlen - 1));
3588                 return;
3589         }
3590
3591         if (tTd(64, 10))
3592                 sm_dprintf("%s\n", response);
3593         if (MilterLogLevel > 8)
3594                 sm_syslog(LOG_INFO, e->e_id, "Milter delete: rcpt %s",
3595                           response);
3596         (void) removefromlist(response, &e->e_sendqueue, e);
3597         return;
3598 }
3599
3600 /*
3601 **  MILTER_REPLBODY -- Replace the current data file with new body
3602 **
3603 **      Parameters:
3604 **              response -- encoded form of new body.
3605 **              rlen -- length of response.
3606 **              newfilter -- if first time called by a new filter
3607 **              e -- current envelope.
3608 **
3609 **      Returns:
3610 **              0 upon success, -1 upon failure
3611 */
3612
3613 static int
3614 milter_replbody(response, rlen, newfilter, e)
3615         char *response;
3616         ssize_t rlen;
3617         bool newfilter;
3618         ENVELOPE *e;
3619 {
3620         static char prevchar;
3621         int i;
3622
3623         if (tTd(64, 10))
3624                 sm_dprintf("milter_replbody\n");
3625
3626         /* If a new filter, reset previous character and truncate data file */
3627         if (newfilter)
3628         {
3629                 off_t prevsize;
3630                 char dfname[MAXPATHLEN];
3631
3632                 (void) sm_strlcpy(dfname, queuename(e, DATAFL_LETTER),
3633                                   sizeof(dfname));
3634
3635                 /* Reset prevchar */
3636                 prevchar = '\0';
3637
3638                 /* Get the current data file information */
3639                 prevsize = sm_io_getinfo(e->e_dfp, SM_IO_WHAT_SIZE, NULL);
3640                 if (prevsize < 0)
3641                         prevsize = 0;
3642
3643                 /* truncate current data file */
3644                 if (sm_io_getinfo(e->e_dfp, SM_IO_WHAT_ISTYPE, BF_FILE_TYPE))
3645                 {
3646                         if (sm_io_setinfo(e->e_dfp, SM_BF_TRUNCATE, NULL) < 0)
3647                         {
3648                                 MILTER_DF_ERROR("milter_replbody: sm_io truncate %s: %s");
3649                                 return -1;
3650                         }
3651                 }
3652                 else
3653                 {
3654                         int err;
3655
3656                         err = sm_io_error(e->e_dfp);
3657                         (void) sm_io_flush(e->e_dfp, SM_TIME_DEFAULT);
3658
3659                         /*
3660                         **  Clear error if tried to fflush()
3661                         **  a read-only file pointer and
3662                         **  there wasn't a previous error.
3663                         */
3664
3665                         if (err == 0)
3666                                 sm_io_clearerr(e->e_dfp);
3667
3668                         /* errno is set implicitly by fseek() before return */
3669                         err = sm_io_seek(e->e_dfp, SM_TIME_DEFAULT,
3670                                          0, SEEK_SET);
3671                         if (err < 0)
3672                         {
3673                                 MILTER_DF_ERROR("milter_replbody: sm_io_seek %s: %s");
3674                                 return -1;
3675                         }
3676 # if NOFTRUNCATE
3677                         /* XXX: Not much we can do except rewind it */
3678                         errno = EINVAL;
3679                         MILTER_DF_ERROR("milter_replbody: ftruncate not available on this platform (%s:%s)");
3680                         return -1;
3681 # else /* NOFTRUNCATE */
3682                         err = ftruncate(sm_io_getinfo(e->e_dfp,
3683                                                       SM_IO_WHAT_FD, NULL),
3684                                         0);
3685                         if (err < 0)
3686                         {
3687                                 MILTER_DF_ERROR("milter_replbody: sm_io ftruncate %s: %s");
3688                                 return -1;
3689                         }
3690 # endif /* NOFTRUNCATE */
3691                 }
3692
3693                 if (prevsize > e->e_msgsize)
3694                         e->e_msgsize = 0;
3695                 else
3696                         e->e_msgsize -= prevsize;
3697         }
3698
3699         if (newfilter && MilterLogLevel > 8)
3700                 sm_syslog(LOG_INFO, e->e_id, "Milter message: body replaced");
3701
3702         if (response == NULL)
3703         {
3704                 /* Flush the buffered '\r' */
3705                 if (prevchar == '\r')
3706                 {
3707                         (void) sm_io_putc(e->e_dfp, SM_TIME_DEFAULT, prevchar);
3708                         e->e_msgsize++;
3709                 }
3710                 return 0;
3711         }
3712
3713         for (i = 0; i < rlen; i++)
3714         {
3715                 /* Buffered char from last chunk */
3716                 if (i == 0 && prevchar == '\r')
3717                 {
3718                         /* Not CRLF, output prevchar */
3719                         if (response[i] != '\n')
3720                         {
3721                                 (void) sm_io_putc(e->e_dfp, SM_TIME_DEFAULT,
3722                                                   prevchar);
3723                                 e->e_msgsize++;
3724                         }
3725                         prevchar = '\0';
3726                 }
3727
3728                 /* Turn CRLF into LF */
3729                 if (response[i] == '\r')
3730                 {
3731                         /* check if at end of chunk */
3732                         if (i + 1 < rlen)
3733                         {
3734                                 /* If LF, strip CR */
3735                                 if (response[i + 1] == '\n')
3736                                         i++;
3737                         }
3738                         else
3739                         {
3740                                 /* check next chunk */
3741                                 prevchar = '\r';
3742                                 continue;
3743                         }
3744                 }
3745                 (void) sm_io_putc(e->e_dfp, SM_TIME_DEFAULT, response[i]);
3746                 e->e_msgsize++;
3747         }
3748         return 0;
3749 }
3750
3751 /*
3752 **  MTA callouts
3753 */
3754
3755 /*
3756 **  MILTER_INIT -- open and negotiate with all of the filters
3757 **
3758 **      Parameters:
3759 **              e -- current envelope.
3760 **              state -- return state from response.
3761 **              milters -- milters structure.
3762 **
3763 **      Returns:
3764 **              true iff at least one filter is active
3765 */
3766
3767 /* ARGSUSED */
3768 bool
3769 milter_init(e, state, milters)
3770         ENVELOPE *e;
3771         char *state;
3772         milters_T *milters;
3773 {
3774         int i;
3775
3776         if (tTd(64, 10))
3777                 sm_dprintf("milter_init\n");
3778
3779         memset(milters, '\0', sizeof(*milters));
3780         *state = SMFIR_CONTINUE;
3781         if (InputFilters[0] == NULL)
3782         {
3783                 if (MilterLogLevel > 10)
3784                         sm_syslog(LOG_INFO, e->e_id,
3785                                   "Milter: no active filter");
3786                 return false;
3787         }
3788
3789         for (i = 0; InputFilters[i] != NULL; i++)
3790         {
3791                 struct milter *m = InputFilters[i];
3792
3793                 m->mf_sock = milter_open(m, false, e);
3794                 if (m->mf_state == SMFS_ERROR)
3795                 {
3796                         MILTER_CHECK_ERROR(true, continue);
3797                         break;
3798                 }
3799
3800                 if (m->mf_sock < 0 ||
3801                     milter_negotiate(m, e, milters) < 0 ||
3802                     m->mf_state == SMFS_ERROR)
3803                 {
3804                         if (tTd(64, 5))
3805                                 sm_dprintf("milter_init(%s): failed to %s\n",
3806                                            m->mf_name,
3807                                            m->mf_sock < 0 ? "open" :
3808                                                             "negotiate");
3809                         if (MilterLogLevel > 0)
3810                                 sm_syslog(LOG_ERR, e->e_id,
3811                                           "Milter (%s): init failed to %s",
3812                                           m->mf_name,
3813                                           m->mf_sock < 0 ? "open" :
3814                                                            "negotiate");
3815
3816                         /* if negotation failure, close socket */
3817                         milter_error(m, e);
3818                         MILTER_CHECK_ERROR(true, continue);
3819                         continue;
3820                 }
3821                 if (MilterLogLevel > 9)
3822                         sm_syslog(LOG_INFO, e->e_id,
3823                                   "Milter (%s): init success to %s",
3824                                   m->mf_name,
3825                                   m->mf_sock < 0 ? "open" : "negotiate");
3826         }
3827
3828         /*
3829         **  If something temp/perm failed with one of the filters,
3830         **  we won't be using any of them, so clear any existing
3831         **  connections.
3832         */
3833
3834         if (*state != SMFIR_CONTINUE)
3835                 milter_quit(e);
3836
3837         return true;
3838 }
3839
3840 /*
3841 **  MILTER_CONNECT -- send connection info to milter filters
3842 **
3843 **      Parameters:
3844 **              hostname -- hostname of remote machine.
3845 **              addr -- address of remote machine.
3846 **              e -- current envelope.
3847 **              state -- return state from response.
3848 **
3849 **      Returns:
3850 **              response string (may be NULL)
3851 */
3852
3853 char *
3854 milter_connect(hostname, addr, e, state)
3855         char *hostname;
3856         SOCKADDR addr;
3857         ENVELOPE *e;
3858         char *state;
3859 {
3860         char family;
3861         unsigned short port;
3862         char *buf, *bp;
3863         char *response;
3864         char *sockinfo = NULL;
3865         ssize_t s;
3866 # if NETINET6
3867         char buf6[INET6_ADDRSTRLEN];
3868 # endif /* NETINET6 */
3869
3870         if (tTd(64, 10))
3871                 sm_dprintf("milter_connect(%s)\n", hostname);
3872         if (MilterLogLevel > 9)
3873                 sm_syslog(LOG_INFO, e->e_id, "Milter: connect to filters");
3874
3875         /* gather data */
3876         switch (addr.sa.sa_family)
3877         {
3878 # if NETUNIX
3879           case AF_UNIX:
3880                 family = SMFIA_UNIX;
3881                 port = htons(0);
3882                 sockinfo = addr.sunix.sun_path;
3883                 break;
3884 # endif /* NETUNIX */
3885
3886 # if NETINET
3887           case AF_INET:
3888                 family = SMFIA_INET;
3889                 port = addr.sin.sin_port;
3890                 sockinfo = (char *) inet_ntoa(addr.sin.sin_addr);
3891                 break;
3892 # endif /* NETINET */
3893
3894 # if NETINET6
3895           case AF_INET6:
3896                 if (IN6_IS_ADDR_V4MAPPED(&addr.sin6.sin6_addr))
3897                         family = SMFIA_INET;
3898                 else
3899                         family = SMFIA_INET6;
3900                 port = addr.sin6.sin6_port;
3901                 sockinfo = anynet_ntop(&addr.sin6.sin6_addr, buf6,
3902                                        sizeof(buf6));
3903                 if (sockinfo == NULL)
3904                         sockinfo = "";
3905                 break;
3906 # endif /* NETINET6 */
3907
3908           default:
3909                 family = SMFIA_UNKNOWN;
3910                 break;
3911         }
3912
3913         s = strlen(hostname) + 1 + sizeof(family);
3914         if (family != SMFIA_UNKNOWN)
3915                 s += sizeof(port) + strlen(sockinfo) + 1;
3916
3917         buf = (char *) xalloc(s);
3918         bp = buf;
3919
3920         /* put together data */
3921         (void) memcpy(bp, hostname, strlen(hostname));
3922         bp += strlen(hostname);
3923         *bp++ = '\0';
3924         (void) memcpy(bp, &family, sizeof(family));
3925         bp += sizeof(family);
3926         if (family != SMFIA_UNKNOWN)
3927         {
3928                 (void) memcpy(bp, &port, sizeof(port));
3929                 bp += sizeof(port);
3930
3931                 /* include trailing '\0' */
3932                 (void) memcpy(bp, sockinfo, strlen(sockinfo) + 1);
3933         }
3934
3935         response = milter_command(SMFIC_CONNECT, buf, s, MilterConnectMacros,
3936                                 e, state, "connect", false);
3937         sm_free(buf); /* XXX */
3938
3939         /*
3940         **  If this message connection is done for,
3941         **  close the filters.
3942         */
3943
3944         if (*state != SMFIR_CONTINUE)
3945         {
3946                 if (MilterLogLevel > 9)
3947                         sm_syslog(LOG_INFO, e->e_id, "Milter: connect, ending");
3948                 milter_quit(e);
3949         }
3950         else
3951                 milter_per_connection_check(e);
3952
3953         /*
3954         **  SMFIR_REPLYCODE can't work with connect due to
3955         **  the requirements of SMTP.  Therefore, ignore the
3956         **  reply code text but keep the state it would reflect.
3957         */
3958
3959         if (*state == SMFIR_REPLYCODE)
3960         {
3961                 if (response != NULL &&
3962                     *response == '4')
3963                 {
3964                         if (strncmp(response, "421 ", 4) == 0)
3965                                 *state = SMFIR_SHUTDOWN;
3966                         else
3967                                 *state = SMFIR_TEMPFAIL;
3968                 }
3969                 else
3970                         *state = SMFIR_REJECT;
3971                 if (response != NULL)
3972                 {
3973                         sm_free(response); /* XXX */
3974                         response = NULL;
3975                 }
3976         }
3977         return response;
3978 }
3979
3980 /*
3981 **  MILTER_HELO -- send SMTP HELO/EHLO command info to milter filters
3982 **
3983 **      Parameters:
3984 **              helo -- argument to SMTP HELO/EHLO command.
3985 **              e -- current envelope.
3986 **              state -- return state from response.
3987 **
3988 **      Returns:
3989 **              response string (may be NULL)
3990 */
3991
3992 char *
3993 milter_helo(helo, e, state)
3994         char *helo;
3995         ENVELOPE *e;
3996         char *state;
3997 {
3998         int i;
3999         char *response;
4000
4001         if (tTd(64, 10))
4002                 sm_dprintf("milter_helo(%s)\n", helo);
4003
4004         /* HELO/EHLO can come at any point */
4005         for (i = 0; InputFilters[i] != NULL; i++)
4006         {
4007                 struct milter *m = InputFilters[i];
4008
4009                 switch (m->mf_state)
4010                 {
4011                   case SMFS_INMSG:
4012                         /* abort in message filters */
4013                         milter_abort_filter(m, e);
4014                         /* FALLTHROUGH */
4015
4016                   case SMFS_DONE:
4017                         /* reset done filters */
4018                         m->mf_state = SMFS_OPEN;
4019                         break;
4020                 }
4021         }
4022
4023         response = milter_command(SMFIC_HELO, helo, strlen(helo) + 1,
4024                                   MilterHeloMacros, e, state, "helo", false);
4025         milter_per_connection_check(e);
4026         return response;
4027 }
4028
4029 /*
4030 **  MILTER_ENVFROM -- send SMTP MAIL command info to milter filters
4031 **
4032 **      Parameters:
4033 **              args -- SMTP MAIL command args (args[0] == sender).
4034 **              e -- current envelope.
4035 **              state -- return state from response.
4036 **
4037 **      Returns:
4038 **              response string (may be NULL)
4039 */
4040
4041 char *
4042 milter_envfrom(args, e, state)
4043         char **args;
4044         ENVELOPE *e;
4045         char *state;
4046 {
4047         int i;
4048         char *buf, *bp;
4049         char *response;
4050         ssize_t s;
4051
4052         if (tTd(64, 10))
4053         {
4054                 sm_dprintf("milter_envfrom:");
4055                 for (i = 0; args[i] != NULL; i++)
4056                         sm_dprintf(" %s", args[i]);
4057                 sm_dprintf("\n");
4058         }
4059
4060         /* sanity check */
4061         if (args[0] == NULL)
4062         {
4063                 *state = SMFIR_REJECT;
4064                 if (MilterLogLevel > 10)
4065                         sm_syslog(LOG_INFO, e->e_id,
4066                                   "Milter: reject, no sender");
4067                 return NULL;
4068         }
4069
4070         /* new message, so ... */
4071         for (i = 0; InputFilters[i] != NULL; i++)
4072         {
4073                 struct milter *m = InputFilters[i];
4074
4075                 switch (m->mf_state)
4076                 {
4077                   case SMFS_INMSG:
4078                         /* abort in message filters */
4079                         milter_abort_filter(m, e);
4080                         /* FALLTHROUGH */
4081
4082                   case SMFS_DONE:
4083                         /* reset done filters */
4084                         m->mf_state = SMFS_OPEN;
4085                         break;
4086                 }
4087         }
4088
4089         /* put together data */
4090         s = 0;
4091         for (i = 0; args[i] != NULL; i++)
4092                 s += strlen(args[i]) + 1;
4093
4094         if (s < 0)
4095         {
4096                 *state = SMFIR_TEMPFAIL;
4097                 return NULL;
4098         }
4099
4100         buf = (char *) xalloc(s);
4101         bp = buf;
4102         for (i = 0; args[i] != NULL; i++)
4103         {
4104                 (void) sm_strlcpy(bp, args[i], s - (bp - buf));
4105                 bp += strlen(bp) + 1;
4106         }
4107
4108         if (MilterLogLevel > 14)
4109                 sm_syslog(LOG_INFO, e->e_id, "Milter: sender: %s", buf);
4110
4111         /* send it over */
4112         response = milter_command(SMFIC_MAIL, buf, s, MilterEnvFromMacros,
4113                                 e, state, "mail", false);
4114         sm_free(buf); /* XXX */
4115
4116         /*
4117         **  If filter rejects/discards a per message command,
4118         **  abort the other filters since we are done with the
4119         **  current message.
4120         */
4121
4122         MILTER_CHECK_DONE_MSG();
4123         if (MilterLogLevel > 10 && *state == SMFIR_REJECT)
4124                 sm_syslog(LOG_INFO, e->e_id, "Milter: reject, sender");
4125         return response;
4126 }
4127
4128 /*
4129 **  MILTER_ENVRCPT -- send SMTP RCPT command info to milter filters
4130 **
4131 **      Parameters:
4132 **              args -- SMTP MAIL command args (args[0] == recipient).
4133 **              e -- current envelope.
4134 **              state -- return state from response.
4135 **              rcpt_error -- does RCPT have an error?
4136 **
4137 **      Returns:
4138 **              response string (may be NULL)
4139 */
4140
4141 char *
4142 milter_envrcpt(args, e, state, rcpt_error)
4143         char **args;
4144         ENVELOPE *e;
4145         char *state;
4146         bool rcpt_error;
4147 {
4148         int i;
4149         char *buf, *bp;
4150         char *response;
4151         ssize_t s;
4152
4153         if (tTd(64, 10))
4154         {
4155                 sm_dprintf("milter_envrcpt:");
4156                 for (i = 0; args[i] != NULL; i++)
4157                         sm_dprintf(" %s", args[i]);
4158                 sm_dprintf("\n");
4159         }
4160
4161         /* sanity check */
4162         if (args[0] == NULL)
4163         {
4164                 *state = SMFIR_REJECT;
4165                 if (MilterLogLevel > 10)
4166                         sm_syslog(LOG_INFO, e->e_id, "Milter: reject, no rcpt");
4167                 return NULL;
4168         }
4169
4170         /* put together data */
4171         s = 0;
4172         for (i = 0; args[i] != NULL; i++)
4173                 s += strlen(args[i]) + 1;
4174
4175         if (s < 0)
4176         {
4177                 *state = SMFIR_TEMPFAIL;
4178                 return NULL;
4179         }
4180
4181         buf = (char *) xalloc(s);
4182         bp = buf;
4183         for (i = 0; args[i] != NULL; i++)
4184         {
4185                 (void) sm_strlcpy(bp, args[i], s - (bp - buf));
4186                 bp += strlen(bp) + 1;
4187         }
4188
4189         if (MilterLogLevel > 14)
4190                 sm_syslog(LOG_INFO, e->e_id, "Milter: rcpts: %s", buf);
4191
4192         /* send it over */
4193         response = milter_command(SMFIC_RCPT, buf, s, MilterEnvRcptMacros,
4194                                 e, state, "rcpt", rcpt_error);
4195         sm_free(buf); /* XXX */
4196         return response;
4197 }
4198
4199 /*
4200 **  MILTER_DATA_CMD -- send SMTP DATA command info to milter filters
4201 **
4202 **      Parameters:
4203 **              e -- current envelope.
4204 **              state -- return state from response.
4205 **
4206 **      Returns:
4207 **              response string (may be NULL)
4208 */
4209
4210 char *
4211 milter_data_cmd(e, state)
4212         ENVELOPE *e;
4213         char *state;
4214 {
4215         if (tTd(64, 10))
4216                 sm_dprintf("milter_data_cmd\n");
4217
4218         /* send it over */
4219         return milter_command(SMFIC_DATA, NULL, 0, MilterDataMacros, e, state,
4220                                 "data", false);
4221 }
4222
4223 /*
4224 **  MILTER_DATA -- send message headers/body and gather final message results
4225 **
4226 **      Parameters:
4227 **              e -- current envelope.
4228 **              state -- return state from response.
4229 **
4230 **      Returns:
4231 **              response string (may be NULL)
4232 **
4233 **      Side effects:
4234 **              - Uses e->e_dfp for access to the body
4235 **              - Can call the various milter action routines to
4236 **                modify the envelope or message.
4237 */
4238
4239 # define MILTER_CHECK_RESULTS() \
4240         if (*state == SMFIR_ACCEPT || \
4241             m->mf_state == SMFS_DONE || \
4242             m->mf_state == SMFS_ERROR) \
4243         { \
4244                 if (m->mf_state != SMFS_ERROR) \
4245                         m->mf_state = SMFS_DONE; \
4246                 continue;       /* to next filter */ \
4247         } \
4248         if (*state != SMFIR_CONTINUE) \
4249         { \
4250                 m->mf_state = SMFS_DONE; \
4251                 goto finishup; \
4252         }
4253
4254 char *
4255 milter_data(e, state)
4256         ENVELOPE *e;
4257         char *state;
4258 {
4259         bool replbody = false;          /* milter_replbody() called? */
4260         bool replfailed = false;        /* milter_replbody() failed? */
4261         bool rewind = false;            /* rewind data file? */
4262         bool dfopen = false;            /* data file open for writing? */
4263         bool newfilter;                 /* reset on each new filter */
4264         char rcmd;
4265         int i;
4266         int save_errno;
4267         char *response = NULL;
4268         time_t eomsent;
4269         ssize_t rlen;
4270
4271         if (tTd(64, 10))
4272                 sm_dprintf("milter_data\n");
4273
4274         *state = SMFIR_CONTINUE;
4275
4276         /*
4277         **  XXX: Should actually send body chunks to each filter
4278         **  a chunk at a time instead of sending the whole body to
4279         **  each filter in turn.  However, only if the filters don't
4280         **  change the body.
4281         */
4282
4283         for (i = 0; InputFilters[i] != NULL; i++)
4284         {
4285                 struct milter *m = InputFilters[i];
4286
4287                 if (*state != SMFIR_CONTINUE &&
4288                     *state != SMFIR_ACCEPT)
4289                 {
4290                         /*
4291                         **  A previous filter has dealt with the message,
4292                         **  safe to stop processing the filters.
4293                         */
4294
4295                         break;
4296                 }
4297
4298                 /* Now reset state for later evaluation */
4299                 *state = SMFIR_CONTINUE;
4300                 newfilter = true;
4301
4302                 /* previous problem? */
4303                 if (m->mf_state == SMFS_ERROR)
4304                 {
4305                         MILTER_CHECK_ERROR(false, continue);
4306                         break;
4307                 }
4308
4309                 /* sanity checks */
4310                 if (m->mf_sock < 0 ||
4311                     (m->mf_state != SMFS_OPEN && m->mf_state != SMFS_INMSG))
4312                         continue;
4313
4314                 m->mf_state = SMFS_INMSG;
4315
4316                 /* check if filter wants the headers */
4317                 if (!bitset(SMFIP_NOHDRS, m->mf_pflags))
4318                 {
4319                         response = milter_headers(m, e, state);
4320                         MILTER_CHECK_RESULTS();
4321                 }
4322
4323                 /* check if filter wants EOH */
4324                 if (!bitset(SMFIP_NOEOH, m->mf_pflags))
4325                 {
4326                         if (tTd(64, 10))
4327                                 sm_dprintf("milter_data: eoh\n");
4328
4329                         if (MilterEOHMacros[0] != NULL)
4330                         {
4331                                 milter_send_macros(m, MilterEOHMacros,
4332                                            SMFIC_EOH, e);
4333                                 MILTER_CHECK_RESULTS();
4334                         }
4335
4336                         /* send it over */
4337                         response = milter_send_command(m, SMFIC_EOH, NULL, 0,
4338                                                        e, state, "eoh");
4339                         MILTER_CHECK_RESULTS();
4340                 }
4341
4342                 /* check if filter wants the body */
4343                 if (!bitset(SMFIP_NOBODY, m->mf_pflags) &&
4344                     e->e_dfp != NULL)
4345                 {
4346                         rewind = true;
4347                         response = milter_body(m, e, state);
4348                         MILTER_CHECK_RESULTS();
4349                 }
4350
4351                 if (MilterEOMMacros[0] != NULL)
4352                 {
4353                         milter_send_macros(m, MilterEOMMacros,
4354                                            SMFIC_BODYEOB, e);
4355                         MILTER_CHECK_RESULTS();
4356                 }
4357
4358                 /* send the final body chunk */
4359                 (void) milter_write(m, SMFIC_BODYEOB, NULL, 0,
4360                                     m->mf_timeout[SMFTO_WRITE], e, "eom");
4361
4362                 /* Get time EOM sent for timeout */
4363                 eomsent = curtime();
4364
4365                 /* deal with the possibility of multiple responses */
4366                 while (*state == SMFIR_CONTINUE)
4367                 {
4368                         /* Check total timeout from EOM to final ACK/NAK */
4369                         if (m->mf_timeout[SMFTO_EOM] > 0 &&
4370                             curtime() - eomsent >= m->mf_timeout[SMFTO_EOM])
4371                         {
4372                                 if (tTd(64, 5))
4373                                         sm_dprintf("milter_data(%s): EOM ACK/NAK timeout\n",
4374                                                 m->mf_name);
4375                                 if (MilterLogLevel > 0)
4376                                         sm_syslog(LOG_ERR, e->e_id,
4377                                                   "milter_data(%s): EOM ACK/NAK timeout",
4378                                                   m->mf_name);
4379                                 milter_error(m, e);
4380                                 MILTER_CHECK_ERROR(false, break);
4381                                 break;
4382                         }
4383
4384                         response = milter_read(m, &rcmd, &rlen,
4385                                                m->mf_timeout[SMFTO_READ], e,
4386                                                 "body");
4387                         if (m->mf_state == SMFS_ERROR)
4388                                 break;
4389
4390                         if (tTd(64, 10))
4391                                 sm_dprintf("milter_data(%s): state %c\n",
4392                                            m->mf_name, (char) rcmd);
4393
4394                         switch (rcmd)
4395                         {
4396                           case SMFIR_REPLYCODE:
4397                                 MILTER_CHECK_REPLYCODE("554 5.7.1 Command rejected");
4398                                 if (MilterLogLevel > 12)
4399                                         sm_syslog(LOG_INFO, e->e_id, "milter=%s, reject=%s",
4400                                                   m->mf_name, response);
4401                                 *state = rcmd;
4402                                 m->mf_state = SMFS_DONE;
4403                                 break;
4404
4405                           case SMFIR_REJECT: /* log msg at end of function */
4406                                 if (MilterLogLevel > 12)
4407                                         sm_syslog(LOG_INFO, e->e_id, "milter=%s, reject",
4408                                                   m->mf_name);
4409                                 *state = rcmd;
4410                                 m->mf_state = SMFS_DONE;
4411                                 break;
4412
4413                           case SMFIR_DISCARD:
4414                                 if (MilterLogLevel > 12)
4415                                         sm_syslog(LOG_INFO, e->e_id, "milter=%s, discard",
4416                                                   m->mf_name);
4417                                 *state = rcmd;
4418                                 m->mf_state = SMFS_DONE;
4419                                 break;
4420
4421                           case SMFIR_TEMPFAIL:
4422                                 if (MilterLogLevel > 12)
4423                                         sm_syslog(LOG_INFO, e->e_id, "milter=%s, tempfail",
4424                                                   m->mf_name);
4425                                 *state = rcmd;
4426                                 m->mf_state = SMFS_DONE;
4427                                 break;
4428
4429                           case SMFIR_CONTINUE:
4430                           case SMFIR_ACCEPT:
4431                                 /* this filter is done with message */
4432                                 if (replfailed)
4433                                         *state = SMFIR_TEMPFAIL;
4434                                 else
4435                                         *state = SMFIR_ACCEPT;
4436                                 m->mf_state = SMFS_DONE;
4437                                 break;
4438
4439                           case SMFIR_PROGRESS:
4440                                 break;
4441
4442                           case SMFIR_QUARANTINE:
4443                                 if (!bitset(SMFIF_QUARANTINE, m->mf_fflags))
4444                                 {
4445                                         if (MilterLogLevel > 9)
4446                                                 sm_syslog(LOG_WARNING, e->e_id,
4447                                                           "milter_data(%s): lied about quarantining, honoring request anyway",
4448                                                           m->mf_name);
4449                                 }
4450                                 if (response == NULL)
4451                                         response = newstr("");
4452                                 if (MilterLogLevel > 3)
4453                                         sm_syslog(LOG_INFO, e->e_id,
4454                                                   "milter=%s, quarantine=%s",
4455                                                   m->mf_name, response);
4456                                 e->e_quarmsg = sm_rpool_strdup_x(e->e_rpool,
4457                                                                  response);
4458                                 macdefine(&e->e_macro, A_PERM,
4459                                           macid("{quarantine}"), e->e_quarmsg);
4460                                 break;
4461
4462                           case SMFIR_ADDHEADER:
4463                                 if (!bitset(SMFIF_ADDHDRS, m->mf_fflags))
4464                                 {
4465                                         if (MilterLogLevel > 9)
4466                                                 sm_syslog(LOG_WARNING, e->e_id,
4467                                                           "milter_data(%s): lied about adding headers, honoring request anyway",
4468                                                           m->mf_name);
4469                                 }
4470                                 milter_addheader(m, response, rlen, e);
4471                                 break;
4472
4473                           case SMFIR_INSHEADER:
4474                                 if (!bitset(SMFIF_ADDHDRS, m->mf_fflags))
4475                                 {
4476                                         if (MilterLogLevel > 9)
4477                                                 sm_syslog(LOG_WARNING, e->e_id,
4478                                                           "milter_data(%s): lied about adding headers, honoring request anyway",
4479                                                           m->mf_name);
4480                                 }
4481                                 milter_insheader(m, response, rlen, e);
4482                                 break;
4483
4484                           case SMFIR_CHGHEADER:
4485                                 if (!bitset(SMFIF_CHGHDRS, m->mf_fflags))
4486                                 {
4487                                         if (MilterLogLevel > 9)
4488                                                 sm_syslog(LOG_WARNING, e->e_id,
4489                                                           "milter_data(%s): lied about changing headers, honoring request anyway",
4490                                                           m->mf_name);
4491                                 }
4492                                 milter_changeheader(m, response, rlen, e);
4493                                 break;
4494
4495                           case SMFIR_CHGFROM:
4496                                 if (!bitset(SMFIF_CHGFROM, m->mf_fflags))
4497                                 {
4498                                         if (MilterLogLevel > 9)
4499                                                 sm_syslog(LOG_WARNING, e->e_id,
4500                                                           "milter_data(%s) lied about changing sender, honoring request anyway",
4501                                                           m->mf_name);
4502                                 }
4503                                 milter_chgfrom(response, rlen, e);
4504                                 break;
4505
4506                           case SMFIR_ADDRCPT:
4507                                 if (!bitset(SMFIF_ADDRCPT, m->mf_fflags))
4508                                 {
4509                                         if (MilterLogLevel > 9)
4510                                                 sm_syslog(LOG_WARNING, e->e_id,
4511                                                           "milter_data(%s) lied about adding recipients, honoring request anyway",
4512                                                           m->mf_name);
4513                                 }
4514                                 milter_addrcpt(response, rlen, e);
4515                                 break;
4516
4517                           case SMFIR_ADDRCPT_PAR:
4518                                 if (!bitset(SMFIF_ADDRCPT_PAR, m->mf_fflags))
4519                                 {
4520                                         if (MilterLogLevel > 9)
4521                                                 sm_syslog(LOG_WARNING, e->e_id,
4522                                                           "milter_data(%s) lied about adding recipients with parameters, honoring request anyway",
4523                                                           m->mf_name);
4524                                 }
4525                                 milter_addrcpt_par(response, rlen, e);
4526                                 break;
4527
4528                           case SMFIR_DELRCPT:
4529                                 if (!bitset(SMFIF_DELRCPT, m->mf_fflags))
4530                                 {
4531                                         if (MilterLogLevel > 9)
4532                                                 sm_syslog(LOG_WARNING, e->e_id,
4533                                                           "milter_data(%s): lied about removing recipients, honoring request anyway",
4534                                                           m->mf_name);
4535                                 }
4536                                 milter_delrcpt(response, rlen, e);
4537                                 break;
4538
4539                           case SMFIR_REPLBODY:
4540                                 if (!bitset(SMFIF_MODBODY, m->mf_fflags))
4541                                 {
4542                                         if (MilterLogLevel > 0)
4543                                                 sm_syslog(LOG_ERR, e->e_id,
4544                                                           "milter_data(%s): lied about replacing body, rejecting request and tempfailing message",
4545                                                           m->mf_name);
4546                                         replfailed = true;
4547                                         break;
4548                                 }
4549
4550                                 /* already failed in attempt */
4551                                 if (replfailed)
4552                                         break;
4553
4554                                 if (!dfopen)
4555                                 {
4556                                         if (milter_reopen_df(e) < 0)
4557                                         {
4558                                                 replfailed = true;
4559                                                 break;
4560                                         }
4561                                         dfopen = true;
4562                                         rewind = true;
4563                                 }
4564
4565                                 if (milter_replbody(response, rlen,
4566                                                     newfilter, e) < 0)
4567                                         replfailed = true;
4568                                 newfilter = false;
4569                                 replbody = true;
4570                                 break;
4571
4572                           default:
4573                                 /* Invalid response to command */
4574                                 if (MilterLogLevel > 0)
4575                                         sm_syslog(LOG_ERR, e->e_id,
4576                                                   "milter_data(%s): returned bogus response %c",
4577                                                   m->mf_name, rcmd);
4578                                 milter_error(m, e);
4579                                 break;
4580                         }
4581                         if (rcmd != SMFIR_REPLYCODE && response != NULL)
4582                         {
4583                                 sm_free(response); /* XXX */
4584                                 response = NULL;
4585                         }
4586
4587                         if (m->mf_state == SMFS_ERROR)
4588                                 break;
4589                 }
4590
4591                 if (replbody && !replfailed)
4592                 {
4593                         /* flush possible buffered character */
4594                         milter_replbody(NULL, 0, !replbody, e);
4595                         replbody = false;
4596                 }
4597
4598                 if (m->mf_state == SMFS_ERROR)
4599                 {
4600                         MILTER_CHECK_ERROR(false, continue);
4601                         goto finishup;
4602                 }
4603         }
4604
4605 finishup:
4606         /* leave things in the expected state if we touched it */
4607         if (replfailed)
4608         {
4609                 if (*state == SMFIR_CONTINUE ||
4610                     *state == SMFIR_ACCEPT)
4611                 {
4612                         *state = SMFIR_TEMPFAIL;
4613                         SM_FREE_CLR(response);
4614                 }
4615
4616                 if (dfopen)
4617                 {
4618                         (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT);
4619                         e->e_dfp = NULL;
4620                         e->e_flags &= ~EF_HAS_DF;
4621                         dfopen = false;
4622                 }
4623                 rewind = false;
4624         }
4625
4626         if ((dfopen && milter_reset_df(e) < 0) ||
4627             (rewind && bfrewind(e->e_dfp) < 0))
4628         {
4629                 save_errno = errno;
4630                 ExitStat = EX_IOERR;
4631
4632                 /*
4633                 **  If filter told us to keep message but we had
4634                 **  an error, we can't really keep it, tempfail it.
4635                 */
4636
4637                 if (*state == SMFIR_CONTINUE ||
4638                     *state == SMFIR_ACCEPT)
4639                 {
4640                         *state = SMFIR_TEMPFAIL;
4641                         SM_FREE_CLR(response);
4642                 }
4643
4644                 errno = save_errno;
4645                 syserr("milter_data: %s/%cf%s: read error",
4646                        qid_printqueue(e->e_qgrp, e->e_qdir),
4647                        DATAFL_LETTER, e->e_id);
4648         }
4649
4650         MILTER_CHECK_DONE_MSG();
4651         if (MilterLogLevel > 10 && *state == SMFIR_REJECT)
4652                 sm_syslog(LOG_INFO, e->e_id, "Milter: reject, data");
4653         return response;
4654 }
4655
4656 /*
4657 **  MILTER_UNKNOWN -- send any unrecognized or unimplemented command
4658 **                      string to milter filters
4659 **
4660 **      Parameters:
4661 **              smtpcmd -- the string itself.
4662 **              e -- current envelope.
4663 **              state -- return state from response.
4664 **
4665 **
4666 **      Returns:
4667 **              response string (may be NULL)
4668 */
4669
4670 char *
4671 milter_unknown(smtpcmd, e, state)
4672         char *smtpcmd;
4673         ENVELOPE *e;
4674         char *state;
4675 {
4676         if (tTd(64, 10))
4677                 sm_dprintf("milter_unknown(%s)\n", smtpcmd);
4678
4679         return milter_command(SMFIC_UNKNOWN, smtpcmd, strlen(smtpcmd) + 1,
4680                                 NULL, e, state, "unknown", false);
4681 }
4682
4683 /*
4684 **  MILTER_QUIT -- informs the filter(s) we are done and closes connection(s)
4685 **
4686 **      Parameters:
4687 **              e -- current envelope.
4688 **
4689 **      Returns:
4690 **              none
4691 */
4692
4693 void
4694 milter_quit(e)
4695         ENVELOPE *e;
4696 {
4697         int i;
4698
4699         if (tTd(64, 10))
4700                 sm_dprintf("milter_quit(%s)\n", e->e_id);
4701
4702         for (i = 0; InputFilters[i] != NULL; i++)
4703                 milter_quit_filter(InputFilters[i], e);
4704 }
4705
4706 /*
4707 **  MILTER_ABORT -- informs the filter(s) that we are aborting current message
4708 **
4709 **      Parameters:
4710 **              e -- current envelope.
4711 **
4712 **      Returns:
4713 **              none
4714 */
4715
4716 void
4717 milter_abort(e)
4718         ENVELOPE *e;
4719 {
4720         int i;
4721
4722         if (tTd(64, 10))
4723                 sm_dprintf("milter_abort\n");
4724
4725         for (i = 0; InputFilters[i] != NULL; i++)
4726         {
4727                 struct milter *m = InputFilters[i];
4728
4729                 /* sanity checks */
4730                 if (m->mf_sock < 0 || m->mf_state != SMFS_INMSG)
4731                         continue;
4732
4733                 milter_abort_filter(m, e);
4734         }
4735 }
4736 #endif /* MILTER */