| 1 | /* |
| 2 | * Copyright (c) 1983 Eric P. Allman |
| 3 | * Copyright (c) 1988, 1993 |
| 4 | * The Regents of the University of California. All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. All advertising materials mentioning features or use of this software |
| 15 | * must display the following acknowledgement: |
| 16 | * This product includes software developed by the University of |
| 17 | * California, Berkeley and its contributors. |
| 18 | * 4. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | */ |
| 34 | |
| 35 | #include "sendmail.h" |
| 36 | |
| 37 | #ifndef lint |
| 38 | #ifdef USERDB |
| 39 | static char sccsid [] = "@(#)udb.c 8.6 (Berkeley) 3/11/94 (with USERDB)"; |
| 40 | #else |
| 41 | static char sccsid [] = "@(#)udb.c 8.6 (Berkeley) 3/11/94 (without USERDB)"; |
| 42 | #endif |
| 43 | #endif |
| 44 | |
| 45 | #ifdef USERDB |
| 46 | |
| 47 | #include <errno.h> |
| 48 | #include <netdb.h> |
| 49 | #include <db.h> |
| 50 | |
| 51 | /* |
| 52 | ** UDB.C -- interface between sendmail and Berkeley User Data Base. |
| 53 | ** |
| 54 | ** This depends on the 4.4BSD db package. |
| 55 | */ |
| 56 | |
| 57 | |
| 58 | struct udbent |
| 59 | { |
| 60 | char *udb_spec; /* string version of spec */ |
| 61 | int udb_type; /* type of entry */ |
| 62 | char *udb_default; /* default host for outgoing mail */ |
| 63 | union |
| 64 | { |
| 65 | /* type UE_REMOTE -- do remote call for lookup */ |
| 66 | struct |
| 67 | { |
| 68 | struct sockaddr_in _udb_addr; /* address */ |
| 69 | int _udb_timeout; /* timeout */ |
| 70 | } udb_remote; |
| 71 | #define udb_addr udb_u.udb_remote._udb_addr |
| 72 | #define udb_timeout udb_u.udb_remote._udb_timeout |
| 73 | |
| 74 | /* type UE_FORWARD -- forward message to remote */ |
| 75 | struct |
| 76 | { |
| 77 | char *_udb_fwdhost; /* name of forward host */ |
| 78 | } udb_forward; |
| 79 | #define udb_fwdhost udb_u.udb_forward._udb_fwdhost |
| 80 | |
| 81 | /* type UE_FETCH -- lookup in local database */ |
| 82 | struct |
| 83 | { |
| 84 | char *_udb_dbname; /* pathname of database */ |
| 85 | DB *_udb_dbp; /* open database ptr */ |
| 86 | } udb_lookup; |
| 87 | #define udb_dbname udb_u.udb_lookup._udb_dbname |
| 88 | #define udb_dbp udb_u.udb_lookup._udb_dbp |
| 89 | } udb_u; |
| 90 | }; |
| 91 | |
| 92 | #define UDB_EOLIST 0 /* end of list */ |
| 93 | #define UDB_SKIP 1 /* skip this entry */ |
| 94 | #define UDB_REMOTE 2 /* look up in remote database */ |
| 95 | #define UDB_DBFETCH 3 /* look up in local database */ |
| 96 | #define UDB_FORWARD 4 /* forward to remote host */ |
| 97 | |
| 98 | #define MAXUDBENT 10 /* maximum number of UDB entries */ |
| 99 | |
| 100 | |
| 101 | struct option |
| 102 | { |
| 103 | char *name; |
| 104 | char *val; |
| 105 | }; |
| 106 | \f/* |
| 107 | ** UDBEXPAND -- look up user in database and expand |
| 108 | ** |
| 109 | ** Parameters: |
| 110 | ** a -- address to expand. |
| 111 | ** sendq -- pointer to head of sendq to put the expansions in. |
| 112 | ** |
| 113 | ** Returns: |
| 114 | ** EX_TEMPFAIL -- if something "odd" happened -- probably due |
| 115 | ** to accessing a file on an NFS server that is down. |
| 116 | ** EX_OK -- otherwise. |
| 117 | ** |
| 118 | ** Side Effects: |
| 119 | ** Modifies sendq. |
| 120 | */ |
| 121 | |
| 122 | int UdbPort = 1616; |
| 123 | int UdbTimeout = 10; |
| 124 | |
| 125 | struct udbent UdbEnts[MAXUDBENT + 1]; |
| 126 | int UdbSock = -1; |
| 127 | bool UdbInitialized = FALSE; |
| 128 | |
| 129 | int |
| 130 | udbexpand(a, sendq, e) |
| 131 | register ADDRESS *a; |
| 132 | ADDRESS **sendq; |
| 133 | register ENVELOPE *e; |
| 134 | { |
| 135 | int i; |
| 136 | register char *p; |
| 137 | DBT key; |
| 138 | DBT info; |
| 139 | bool breakout; |
| 140 | register struct udbent *up; |
| 141 | int keylen; |
| 142 | int naddrs; |
| 143 | char keybuf[MAXKEY]; |
| 144 | char buf[BUFSIZ]; |
| 145 | |
| 146 | if (tTd(28, 1)) |
| 147 | printf("udbexpand(%s)\n", a->q_paddr); |
| 148 | |
| 149 | /* make certain we are supposed to send to this address */ |
| 150 | if (bitset(QDONTSEND|QVERIFIED, a->q_flags)) |
| 151 | return EX_OK; |
| 152 | e->e_to = a->q_paddr; |
| 153 | |
| 154 | /* on first call, locate the database */ |
| 155 | if (!UdbInitialized) |
| 156 | { |
| 157 | extern int _udbx_init(); |
| 158 | |
| 159 | if (_udbx_init() == EX_TEMPFAIL) |
| 160 | return EX_TEMPFAIL; |
| 161 | } |
| 162 | |
| 163 | /* short circuit the process if no chance of a match */ |
| 164 | if (UdbSpec == NULL || UdbSpec[0] == '\0') |
| 165 | return EX_OK; |
| 166 | |
| 167 | /* if name is too long, assume it won't match */ |
| 168 | if (strlen(a->q_user) > sizeof keybuf - 12) |
| 169 | return EX_OK; |
| 170 | |
| 171 | /* if name begins with a colon, it indicates our metadata */ |
| 172 | if (a->q_user[0] == ':') |
| 173 | return EX_OK; |
| 174 | |
| 175 | /* build actual database key */ |
| 176 | (void) strcpy(keybuf, a->q_user); |
| 177 | (void) strcat(keybuf, ":maildrop"); |
| 178 | keylen = strlen(keybuf); |
| 179 | |
| 180 | breakout = FALSE; |
| 181 | for (up = UdbEnts; !breakout; up++) |
| 182 | { |
| 183 | char *user; |
| 184 | |
| 185 | /* |
| 186 | ** Select action based on entry type. |
| 187 | ** |
| 188 | ** On dropping out of this switch, "class" should |
| 189 | ** explain the type of the data, and "user" should |
| 190 | ** contain the user information. |
| 191 | */ |
| 192 | |
| 193 | switch (up->udb_type) |
| 194 | { |
| 195 | case UDB_DBFETCH: |
| 196 | key.data = keybuf; |
| 197 | key.size = keylen; |
| 198 | if (tTd(28, 80)) |
| 199 | printf("udbexpand: trying %s (%d)\n", |
| 200 | keybuf, keylen); |
| 201 | i = (*up->udb_dbp->seq)(up->udb_dbp, &key, &info, R_CURSOR); |
| 202 | if (i > 0 || info.size <= 0) |
| 203 | { |
| 204 | if (tTd(28, 2)) |
| 205 | printf("udbexpand: no match on %s (%d)\n", |
| 206 | keybuf, keylen); |
| 207 | continue; |
| 208 | } |
| 209 | if (tTd(28, 80)) |
| 210 | printf("udbexpand: match %.*s: %.*s\n", |
| 211 | key.size, key.data, info.size, info.data); |
| 212 | |
| 213 | naddrs = 0; |
| 214 | a->q_flags &= ~QSELFREF; |
| 215 | while (i == 0 && key.size == keylen && |
| 216 | bcmp(key.data, keybuf, keylen) == 0) |
| 217 | { |
| 218 | if (bitset(EF_VRFYONLY, e->e_flags)) |
| 219 | { |
| 220 | a->q_flags |= QVERIFIED; |
| 221 | e->e_nrcpts++; |
| 222 | return EX_OK; |
| 223 | } |
| 224 | |
| 225 | breakout = TRUE; |
| 226 | if (info.size < sizeof buf) |
| 227 | user = buf; |
| 228 | else |
| 229 | user = xalloc(info.size + 1); |
| 230 | bcopy(info.data, user, info.size); |
| 231 | user[info.size] = '\0'; |
| 232 | |
| 233 | message("expanded to %s", user); |
| 234 | #ifdef LOG |
| 235 | if (LogLevel >= 10) |
| 236 | syslog(LOG_INFO, "%s: expand %s => %s", |
| 237 | e->e_id, e->e_to, user); |
| 238 | #endif |
| 239 | AliasLevel++; |
| 240 | naddrs += sendtolist(user, a, sendq, e); |
| 241 | AliasLevel--; |
| 242 | |
| 243 | if (user != buf) |
| 244 | free(user); |
| 245 | |
| 246 | /* get the next record */ |
| 247 | i = (*up->udb_dbp->seq)(up->udb_dbp, &key, &info, R_NEXT); |
| 248 | } |
| 249 | |
| 250 | /* if nothing ever matched, try next database */ |
| 251 | if (!breakout) |
| 252 | continue; |
| 253 | |
| 254 | if (naddrs > 0 && !bitset(QSELFREF, a->q_flags)) |
| 255 | { |
| 256 | if (tTd(28, 5)) |
| 257 | { |
| 258 | printf("udbexpand: QDONTSEND "); |
| 259 | printaddr(a, FALSE); |
| 260 | } |
| 261 | a->q_flags |= QDONTSEND; |
| 262 | } |
| 263 | if (i < 0) |
| 264 | { |
| 265 | syserr("udbexpand: db-get %.*s stat %d", |
| 266 | key.size, key.data, i); |
| 267 | return EX_TEMPFAIL; |
| 268 | } |
| 269 | |
| 270 | /* |
| 271 | ** If this address has a -request address, reflect |
| 272 | ** it into the envelope. |
| 273 | */ |
| 274 | |
| 275 | (void) strcpy(keybuf, a->q_user); |
| 276 | (void) strcat(keybuf, ":mailsender"); |
| 277 | keylen = strlen(keybuf); |
| 278 | key.data = keybuf; |
| 279 | key.size = keylen; |
| 280 | i = (*up->udb_dbp->get)(up->udb_dbp, &key, &info, 0); |
| 281 | if (i != 0 || info.size <= 0) |
| 282 | break; |
| 283 | a->q_owner = xalloc(info.size + 1); |
| 284 | bcopy(info.data, a->q_owner, info.size); |
| 285 | a->q_owner[info.size] = '\0'; |
| 286 | break; |
| 287 | |
| 288 | case UDB_REMOTE: |
| 289 | /* not yet implemented */ |
| 290 | continue; |
| 291 | |
| 292 | case UDB_FORWARD: |
| 293 | if (bitset(EF_VRFYONLY, e->e_flags)) |
| 294 | return EX_OK; |
| 295 | i = strlen(up->udb_fwdhost) + strlen(a->q_user) + 1; |
| 296 | if (i < sizeof buf) |
| 297 | user = buf; |
| 298 | else |
| 299 | user = xalloc(i + 1); |
| 300 | (void) sprintf(user, "%s@%s", a->q_user, up->udb_fwdhost); |
| 301 | message("expanded to %s", user); |
| 302 | a->q_flags &= ~QSELFREF; |
| 303 | AliasLevel++; |
| 304 | naddrs = sendtolist(user, a, sendq, e); |
| 305 | AliasLevel--; |
| 306 | if (naddrs > 0 && !bitset(QSELFREF, a->q_flags)) |
| 307 | { |
| 308 | if (tTd(28, 5)) |
| 309 | { |
| 310 | printf("udbexpand: QDONTSEND "); |
| 311 | printaddr(a, FALSE); |
| 312 | } |
| 313 | a->q_flags |= QDONTSEND; |
| 314 | } |
| 315 | if (user != buf) |
| 316 | free(user); |
| 317 | breakout = TRUE; |
| 318 | break; |
| 319 | |
| 320 | case UDB_EOLIST: |
| 321 | breakout = TRUE; |
| 322 | continue; |
| 323 | |
| 324 | default: |
| 325 | /* unknown entry type */ |
| 326 | continue; |
| 327 | } |
| 328 | } |
| 329 | return EX_OK; |
| 330 | } |
| 331 | \f/* |
| 332 | ** UDBSENDER -- return canonical external name of sender, given local name |
| 333 | ** |
| 334 | ** Parameters: |
| 335 | ** sender -- the name of the sender on the local machine. |
| 336 | ** |
| 337 | ** Returns: |
| 338 | ** The external name for this sender, if derivable from the |
| 339 | ** database. |
| 340 | ** NULL -- if nothing is changed from the database. |
| 341 | ** |
| 342 | ** Side Effects: |
| 343 | ** none. |
| 344 | */ |
| 345 | |
| 346 | char * |
| 347 | udbsender(sender) |
| 348 | char *sender; |
| 349 | { |
| 350 | extern char *udbmatch(); |
| 351 | |
| 352 | return udbmatch(sender, "mailname"); |
| 353 | } |
| 354 | |
| 355 | |
| 356 | char * |
| 357 | udbmatch(user, field) |
| 358 | char *user; |
| 359 | char *field; |
| 360 | { |
| 361 | register char *p; |
| 362 | register struct udbent *up; |
| 363 | int i; |
| 364 | int keylen; |
| 365 | DBT key, info; |
| 366 | char keybuf[MAXKEY]; |
| 367 | |
| 368 | if (tTd(28, 1)) |
| 369 | printf("udbmatch(%s, %s)\n", user, field); |
| 370 | |
| 371 | if (!UdbInitialized) |
| 372 | { |
| 373 | if (_udbx_init() == EX_TEMPFAIL) |
| 374 | return NULL; |
| 375 | } |
| 376 | |
| 377 | /* short circuit if no spec */ |
| 378 | if (UdbSpec == NULL || UdbSpec[0] == '\0') |
| 379 | return NULL; |
| 380 | |
| 381 | /* long names can never match and are a pain to deal with */ |
| 382 | if ((strlen(user) + strlen(field)) > sizeof keybuf - 4) |
| 383 | return NULL; |
| 384 | |
| 385 | /* names beginning with colons indicate metadata */ |
| 386 | if (user[0] == ':') |
| 387 | return NULL; |
| 388 | |
| 389 | /* build database key */ |
| 390 | (void) strcpy(keybuf, user); |
| 391 | (void) strcat(keybuf, ":"); |
| 392 | (void) strcat(keybuf, field); |
| 393 | keylen = strlen(keybuf); |
| 394 | |
| 395 | for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) |
| 396 | { |
| 397 | /* |
| 398 | ** Select action based on entry type. |
| 399 | */ |
| 400 | |
| 401 | switch (up->udb_type) |
| 402 | { |
| 403 | case UDB_DBFETCH: |
| 404 | key.data = keybuf; |
| 405 | key.size = keylen; |
| 406 | i = (*up->udb_dbp->get)(up->udb_dbp, &key, &info, 0); |
| 407 | if (i != 0 || info.size <= 0) |
| 408 | { |
| 409 | if (tTd(28, 2)) |
| 410 | printf("udbmatch: no match on %s (%d)\n", |
| 411 | keybuf, keylen); |
| 412 | continue; |
| 413 | } |
| 414 | |
| 415 | p = xalloc(info.size + 1); |
| 416 | bcopy(info.data, p, info.size); |
| 417 | p[info.size] = '\0'; |
| 418 | if (tTd(28, 1)) |
| 419 | printf("udbmatch ==> %s\n", p); |
| 420 | return p; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | if (strcmp(field, "mailname") != 0) |
| 425 | return NULL; |
| 426 | |
| 427 | /* |
| 428 | ** Nothing yet. Search again for a default case. But only |
| 429 | ** use it if we also have a forward (:maildrop) pointer already |
| 430 | ** in the database. |
| 431 | */ |
| 432 | |
| 433 | /* build database key */ |
| 434 | (void) strcpy(keybuf, user); |
| 435 | (void) strcat(keybuf, ":maildrop"); |
| 436 | keylen = strlen(keybuf); |
| 437 | |
| 438 | for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) |
| 439 | { |
| 440 | switch (up->udb_type) |
| 441 | { |
| 442 | case UDB_DBFETCH: |
| 443 | /* get the default case for this database */ |
| 444 | if (up->udb_default == NULL) |
| 445 | { |
| 446 | key.data = ":default:mailname"; |
| 447 | key.size = strlen(key.data); |
| 448 | i = (*up->udb_dbp->get)(up->udb_dbp, &key, &info, 0); |
| 449 | if (i != 0 || info.size <= 0) |
| 450 | { |
| 451 | /* no default case */ |
| 452 | up->udb_default = ""; |
| 453 | continue; |
| 454 | } |
| 455 | |
| 456 | /* save the default case */ |
| 457 | up->udb_default = xalloc(info.size + 1); |
| 458 | bcopy(info.data, up->udb_default, info.size); |
| 459 | up->udb_default[info.size] = '\0'; |
| 460 | } |
| 461 | else if (up->udb_default[0] == '\0') |
| 462 | continue; |
| 463 | |
| 464 | /* we have a default case -- verify user:maildrop */ |
| 465 | key.data = keybuf; |
| 466 | key.size = keylen; |
| 467 | i = (*up->udb_dbp->get)(up->udb_dbp, &key, &info, 0); |
| 468 | if (i != 0 || info.size <= 0) |
| 469 | { |
| 470 | /* nope -- no aliasing for this user */ |
| 471 | continue; |
| 472 | } |
| 473 | |
| 474 | /* they exist -- build the actual address */ |
| 475 | p = xalloc(strlen(user) + strlen(up->udb_default) + 2); |
| 476 | (void) strcpy(p, user); |
| 477 | (void) strcat(p, "@"); |
| 478 | (void) strcat(p, up->udb_default); |
| 479 | if (tTd(28, 1)) |
| 480 | printf("udbmatch ==> %s\n", p); |
| 481 | return p; |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | /* still nothing.... too bad */ |
| 486 | return NULL; |
| 487 | } |
| 488 | \f/* |
| 489 | ** _UDBX_INIT -- parse the UDB specification, opening any valid entries. |
| 490 | ** |
| 491 | ** Parameters: |
| 492 | ** none. |
| 493 | ** |
| 494 | ** Returns: |
| 495 | ** EX_TEMPFAIL -- if it appeared it couldn't get hold of a |
| 496 | ** database due to a host being down or some similar |
| 497 | ** (recoverable) situation. |
| 498 | ** EX_OK -- otherwise. |
| 499 | ** |
| 500 | ** Side Effects: |
| 501 | ** Fills in the UdbEnts structure from UdbSpec. |
| 502 | */ |
| 503 | |
| 504 | #define MAXUDBOPTS 27 |
| 505 | |
| 506 | int |
| 507 | _udbx_init() |
| 508 | { |
| 509 | register char *p; |
| 510 | int i; |
| 511 | register struct udbent *up; |
| 512 | char buf[BUFSIZ]; |
| 513 | |
| 514 | if (UdbInitialized) |
| 515 | return EX_OK; |
| 516 | |
| 517 | # ifdef UDB_DEFAULT_SPEC |
| 518 | if (UdbSpec == NULL) |
| 519 | UdbSpec = UDB_DEFAULT_SPEC; |
| 520 | # endif |
| 521 | |
| 522 | p = UdbSpec; |
| 523 | up = UdbEnts; |
| 524 | while (p != NULL) |
| 525 | { |
| 526 | char *spec; |
| 527 | auto int rcode; |
| 528 | int nopts; |
| 529 | int nmx; |
| 530 | register struct hostent *h; |
| 531 | char *mxhosts[MAXMXHOSTS + 1]; |
| 532 | struct option opts[MAXUDBOPTS + 1]; |
| 533 | |
| 534 | while (*p == ' ' || *p == '\t' || *p == ',') |
| 535 | p++; |
| 536 | if (*p == '\0') |
| 537 | break; |
| 538 | spec = p; |
| 539 | p = strchr(p, ','); |
| 540 | if (p != NULL) |
| 541 | *p++ = '\0'; |
| 542 | |
| 543 | /* extract options */ |
| 544 | nopts = _udb_parsespec(spec, opts, MAXUDBOPTS); |
| 545 | |
| 546 | /* |
| 547 | ** Decode database specification. |
| 548 | ** |
| 549 | ** In the sendmail tradition, the leading character |
| 550 | ** defines the semantics of the rest of the entry. |
| 551 | ** |
| 552 | ** +hostname -- send a datagram to the udb server |
| 553 | ** on host "hostname" asking for the |
| 554 | ** home mail server for this user. |
| 555 | ** *hostname -- similar to +hostname, except that the |
| 556 | ** hostname is searched as an MX record; |
| 557 | ** resulting hosts are searched as for |
| 558 | ** +mxhostname. If no MX host is found, |
| 559 | ** this is the same as +hostname. |
| 560 | ** @hostname -- forward email to the indicated host. |
| 561 | ** This should be the last in the list, |
| 562 | ** since it always matches the input. |
| 563 | ** /dbname -- search the named database on the local |
| 564 | ** host using the Berkeley db package. |
| 565 | */ |
| 566 | |
| 567 | switch (*spec) |
| 568 | { |
| 569 | case '+': /* search remote database */ |
| 570 | case '*': /* search remote database (expand MX) */ |
| 571 | if (*spec == '*') |
| 572 | { |
| 573 | #if NAMED_BIND |
| 574 | nmx = getmxrr(spec + 1, mxhosts, FALSE, &rcode); |
| 575 | #else |
| 576 | mxhosts[0] = spec + 1; |
| 577 | nmx = 1; |
| 578 | rcode = 0; |
| 579 | #endif |
| 580 | if (tTd(28, 16)) |
| 581 | { |
| 582 | int i; |
| 583 | |
| 584 | printf("getmxrr(%s): %d", spec + 1, nmx); |
| 585 | for (i = 0; i <= nmx; i++) |
| 586 | printf(" %s", mxhosts[i]); |
| 587 | printf("\n"); |
| 588 | } |
| 589 | } |
| 590 | else |
| 591 | { |
| 592 | nmx = 1; |
| 593 | mxhosts[0] = spec + 1; |
| 594 | } |
| 595 | |
| 596 | for (i = 0; i < nmx; i++) |
| 597 | { |
| 598 | h = gethostbyname(mxhosts[i]); |
| 599 | if (h == NULL) |
| 600 | continue; |
| 601 | up->udb_type = UDB_REMOTE; |
| 602 | up->udb_addr.sin_family = h->h_addrtype; |
| 603 | bcopy(h->h_addr_list[0], |
| 604 | (char *) &up->udb_addr.sin_addr, |
| 605 | sizeof up->udb_addr.sin_addr); |
| 606 | up->udb_addr.sin_port = UdbPort; |
| 607 | up->udb_timeout = UdbTimeout; |
| 608 | up++; |
| 609 | } |
| 610 | |
| 611 | /* set up a datagram socket */ |
| 612 | if (UdbSock < 0) |
| 613 | { |
| 614 | UdbSock = socket(AF_INET, SOCK_DGRAM, 0); |
| 615 | (void) fcntl(UdbSock, F_SETFD, 1); |
| 616 | } |
| 617 | break; |
| 618 | |
| 619 | case '@': /* forward to remote host */ |
| 620 | up->udb_type = UDB_FORWARD; |
| 621 | up->udb_fwdhost = spec + 1; |
| 622 | up++; |
| 623 | break; |
| 624 | |
| 625 | case '/': /* look up remote name */ |
| 626 | up->udb_dbname = spec; |
| 627 | errno = 0; |
| 628 | up->udb_dbp = dbopen(spec, O_RDONLY, 0644, DB_BTREE, NULL); |
| 629 | if (up->udb_dbp == NULL) |
| 630 | { |
| 631 | if (errno != ENOENT && errno != EACCES) |
| 632 | { |
| 633 | #ifdef LOG |
| 634 | if (LogLevel > 2) |
| 635 | syslog(LOG_ERR, "dbopen(%s): %s", |
| 636 | spec, errstring(errno)); |
| 637 | #endif |
| 638 | up->udb_type = UDB_EOLIST; |
| 639 | goto tempfail; |
| 640 | } |
| 641 | break; |
| 642 | } |
| 643 | up->udb_type = UDB_DBFETCH; |
| 644 | up++; |
| 645 | break; |
| 646 | } |
| 647 | } |
| 648 | up->udb_type = UDB_EOLIST; |
| 649 | |
| 650 | if (tTd(28, 4)) |
| 651 | { |
| 652 | for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) |
| 653 | { |
| 654 | switch (up->udb_type) |
| 655 | { |
| 656 | case UDB_REMOTE: |
| 657 | printf("REMOTE: addr %s, timeo %d\n", |
| 658 | anynet_ntoa((SOCKADDR *) &up->udb_addr), |
| 659 | up->udb_timeout); |
| 660 | break; |
| 661 | |
| 662 | case UDB_DBFETCH: |
| 663 | printf("FETCH: file %s\n", |
| 664 | up->udb_dbname); |
| 665 | break; |
| 666 | |
| 667 | case UDB_FORWARD: |
| 668 | printf("FORWARD: host %s\n", |
| 669 | up->udb_fwdhost); |
| 670 | break; |
| 671 | |
| 672 | default: |
| 673 | printf("UNKNOWN\n"); |
| 674 | break; |
| 675 | } |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | UdbInitialized = TRUE; |
| 680 | errno = 0; |
| 681 | return EX_OK; |
| 682 | |
| 683 | /* |
| 684 | ** On temporary failure, back out anything we've already done |
| 685 | */ |
| 686 | |
| 687 | tempfail: |
| 688 | for (up = UdbEnts; up->udb_type != UDB_EOLIST; up++) |
| 689 | { |
| 690 | if (up->udb_type == UDB_DBFETCH) |
| 691 | { |
| 692 | (*up->udb_dbp->close)(up->udb_dbp); |
| 693 | } |
| 694 | } |
| 695 | return EX_TEMPFAIL; |
| 696 | } |
| 697 | |
| 698 | int |
| 699 | _udb_parsespec(udbspec, opt, maxopts) |
| 700 | char *udbspec; |
| 701 | struct option opt[]; |
| 702 | int maxopts; |
| 703 | { |
| 704 | register char *spec; |
| 705 | register char *spec_end; |
| 706 | register int optnum; |
| 707 | |
| 708 | spec_end = strchr(udbspec, ':'); |
| 709 | for (optnum = 0; optnum < maxopts && (spec = spec_end) != NULL; optnum++) |
| 710 | { |
| 711 | register char *p; |
| 712 | |
| 713 | while (isascii(*spec) && isspace(*spec)) |
| 714 | spec++; |
| 715 | spec_end = strchr(spec, ':'); |
| 716 | if (spec_end != NULL) |
| 717 | *spec_end++ = '\0'; |
| 718 | |
| 719 | opt[optnum].name = spec; |
| 720 | opt[optnum].val = NULL; |
| 721 | p = strchr(spec, '='); |
| 722 | if (p != NULL) |
| 723 | opt[optnum].val = ++p; |
| 724 | } |
| 725 | return optnum; |
| 726 | } |
| 727 | |
| 728 | #else /* not USERDB */ |
| 729 | |
| 730 | int |
| 731 | udbexpand(a, sendq, e) |
| 732 | ADDRESS *a; |
| 733 | ADDRESS **sendq; |
| 734 | ENVELOPE *e; |
| 735 | { |
| 736 | return EX_OK; |
| 737 | } |
| 738 | |
| 739 | #endif /* USERDB */ |