1 /* $NetBSD: rpcbind.c,v 1.27 2019/01/03 19:26:50 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 /* 31 * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc. 32 */ 33 34 /* #ident "@(#)rpcbind.c 1.19 94/04/25 SMI" */ 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)rpcbind.c 1.35 89/04/21 Copyr 1984 Sun Micro"; 39 #endif 40 #endif 41 42 /* 43 * rpcbind.c 44 * Implements the program, version to address mapping for rpc. 45 * 46 */ 47 48 #include <sys/types.h> 49 #include <sys/stat.h> 50 #include <sys/errno.h> 51 #include <sys/time.h> 52 #include <sys/resource.h> 53 #include <sys/wait.h> 54 #include <sys/signal.h> 55 #include <sys/socket.h> 56 #include <sys/un.h> 57 #include <rpc/rpc.h> 58 #include <rpc/rpc_com.h> 59 #ifdef PORTMAP 60 #include <netinet/in.h> 61 #endif 62 #include <arpa/inet.h> 63 #include <fcntl.h> 64 #include <netdb.h> 65 #include <stdio.h> 66 #include <netconfig.h> 67 #include <stdlib.h> 68 #include <unistd.h> 69 #include <syslog.h> 70 #include <err.h> 71 #include <util.h> 72 #include <pwd.h> 73 #include <string.h> 74 #include <errno.h> 75 #include "rpcbind.h" 76 77 #ifdef RPCBIND_RUMP 78 #include <semaphore.h> 79 80 #include <rump/rump.h> 81 #include <rump/rump_syscalls.h> 82 83 #include "svc_fdset.h" 84 85 extern sem_t gensem; 86 #define DEBUGGING 1 87 #else 88 #define DEBUGGING 0 89 #endif 90 91 /* Global variables */ 92 int debugging = DEBUGGING; /* Tell me what's going on */ 93 int doabort = 0; /* When debugging, do an abort on errors */ 94 rpcblist_ptr list_rbl; /* A list of version 3/4 rpcbind services */ 95 96 /* who to suid to if -s is given */ 97 #define RUN_AS "daemon" 98 99 #define RPCBINDDLOCK "/var/run/rpcbind.lock" 100 101 static int runasdaemon = 0; 102 int insecure = 0; 103 int oldstyle_local = 0; 104 #ifdef LIBWRAP 105 int libwrap = 0; 106 #endif 107 int verboselog = 0; 108 109 static char **hosts = NULL; 110 static struct sockaddr **bound_sa; 111 static int ipv6_only = 0; 112 static int nhosts = 0; 113 static int on = 1; 114 #ifndef RPCBIND_RUMP 115 static int rpcbindlockfd; 116 #endif 117 118 #ifdef WARMSTART 119 /* Local Variable */ 120 static int warmstart = 0; /* Grab an old copy of registrations */ 121 #endif 122 123 #ifdef PORTMAP 124 struct pmaplist *list_pml; /* A list of version 2 rpcbind services */ 125 const char *udptrans; /* Name of UDP transport */ 126 const char *tcptrans; /* Name of TCP transport */ 127 const char *udp_uaddr; /* Universal UDP address */ 128 const char *tcp_uaddr; /* Universal TCP address */ 129 #endif 130 static const char servname[] = "sunrpc"; 131 132 const char rpcbind_superuser[] = "superuser"; 133 const char rpcbind_unknown[] = "unknown"; 134 135 static int init_transport(struct netconfig *); 136 static void rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *, 137 struct netbuf *); 138 __dead static void terminate(int); 139 static void update_bound_sa(void); 140 #ifndef RPCBIND_RUMP 141 static void parseargs(int, char *[]); 142 143 int 144 main(int argc, char *argv[]) 145 #else 146 int rpcbind_main(void *); 147 int 148 rpcbind_main(void *arg) 149 #endif 150 { 151 struct netconfig *nconf; 152 void *nc_handle; /* Net config handle */ 153 struct rlimit rl; 154 int maxrec = RPC_MAXDATASIZE; 155 156 #ifdef RPCBIND_RUMP 157 svc_fdset_init(SVC_FDSET_MT); 158 #else 159 parseargs(argc, argv); 160 #endif 161 162 if (getrlimit(RLIMIT_NOFILE, &rl) == -1) 163 err(EXIT_FAILURE, "getrlimit(RLIMIT_NOFILE)"); 164 165 if (rl.rlim_cur < 128) { 166 if (rl.rlim_max <= 128) 167 rl.rlim_cur = rl.rlim_max; 168 else 169 rl.rlim_cur = 128; 170 if (setrlimit(RLIMIT_NOFILE, &rl) < 0) 171 err(EXIT_FAILURE, "setrlimit(RLIMIT_NOFILE)"); 172 } 173 update_bound_sa(); 174 175 #ifndef RPCBIND_RUMP 176 /* Check that another rpcbind isn't already running. */ 177 if ((rpcbindlockfd = open(RPCBINDDLOCK, O_RDONLY|O_CREAT, 0444)) == -1) 178 err(EXIT_FAILURE, "%s", RPCBINDDLOCK); 179 180 if (flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) 181 errx(EXIT_FAILURE, 182 "another rpcbind is already running. Aborting"); 183 184 if (geteuid()) /* This command allowed only to root */ 185 errx(EXIT_FAILURE, "Sorry. You are not superuser\n"); 186 #endif 187 nc_handle = setnetconfig(); /* open netconfig file */ 188 if (nc_handle == NULL) 189 errx(EXIT_FAILURE, "could not read /etc/netconfig"); 190 191 #ifdef PORTMAP 192 udptrans = ""; 193 tcptrans = ""; 194 #endif 195 196 nconf = getnetconfigent("local"); 197 if (nconf == NULL) 198 errx(EXIT_FAILURE, "can't find local transport"); 199 200 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 201 202 init_transport(nconf); 203 204 while ((nconf = getnetconfig(nc_handle))) { 205 if (nconf->nc_flag & NC_VISIBLE) { 206 if (ipv6_only == 1 && strcmp(nconf->nc_protofmly, 207 "inet") == 0) { 208 /* DO NOTHING */ 209 } else 210 init_transport(nconf); 211 } 212 } 213 endnetconfig(nc_handle); 214 215 /* catch the usual termination signals for graceful exit */ 216 (void) signal(SIGCHLD, reap); 217 (void) signal(SIGINT, terminate); 218 (void) signal(SIGTERM, terminate); 219 (void) signal(SIGQUIT, terminate); 220 /* ignore others that could get sent */ 221 (void) signal(SIGPIPE, SIG_IGN); 222 #ifndef RPCBIND_RUMP 223 (void) signal(SIGHUP, SIG_IGN); 224 #endif 225 (void) signal(SIGUSR1, SIG_IGN); 226 (void) signal(SIGUSR2, SIG_IGN); 227 #ifdef WARMSTART 228 if (warmstart) { 229 read_warmstart(); 230 } 231 #endif 232 if (debugging) { 233 printf("rpcbind debugging enabled."); 234 if (doabort) { 235 printf(" Will abort on errors!\n"); 236 } else { 237 printf("\n"); 238 } 239 } else { 240 if (daemon(0, 0)) 241 err(EXIT_FAILURE, "fork failed"); 242 } 243 244 openlog("rpcbind", 0, LOG_DAEMON); 245 pidfile(NULL); 246 247 if (runasdaemon) { 248 struct passwd *p; 249 250 if((p = getpwnam(RUN_AS)) == NULL) { 251 syslog(LOG_ERR, "cannot get uid of daemon: %m"); 252 exit(EXIT_FAILURE); 253 } 254 if (setuid(p->pw_uid) == -1) { 255 syslog(LOG_ERR, "setuid to daemon failed: %m"); 256 exit(EXIT_FAILURE); 257 } 258 } 259 260 network_init(); 261 262 #ifdef RPCBIND_RUMP 263 sem_post(&gensem); 264 #endif 265 my_svc_run(); 266 syslog(LOG_ERR, "svc_run returned unexpectedly"); 267 rpcbind_abort(); 268 /* NOTREACHED */ 269 270 return EXIT_SUCCESS; 271 } 272 273 /* 274 * Adds the entry into the rpcbind database. 275 * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also 276 * Returns 0 if succeeds, else fails 277 */ 278 static int 279 init_transport(struct netconfig *nconf) 280 { 281 int fd; 282 struct t_bind taddr; 283 struct addrinfo hints, *res = NULL; 284 struct __rpc_sockinfo si; 285 SVCXPRT *my_xprt; 286 int status; /* bound checking ? */ 287 int aicode; 288 int addrlen; 289 int nhostsbak; 290 int bound; 291 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 292 struct sockaddr *sa; 293 struct sockaddr_un sun; 294 #ifndef RPCBIND_RUMP 295 mode_t oldmask; 296 #endif 297 298 if ((nconf->nc_semantics != NC_TPI_CLTS) && 299 (nconf->nc_semantics != NC_TPI_COTS) && 300 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 301 return 1; /* not my type */ 302 #ifdef RPCBIND_DEBUG 303 if (debugging) { 304 int i; 305 char **s; 306 307 (void)fprintf(stderr, "%s: %ld lookup routines :\n", 308 nconf->nc_netid, nconf->nc_nlookups); 309 for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups; 310 i++, s++) 311 (void)fprintf(stderr, "[%d] - %s\n", i, *s); 312 } 313 #endif 314 315 /* 316 * XXX - using RPC library internal functions. 317 */ 318 if (strcmp(nconf->nc_netid, "local") == 0) { 319 /* 320 * For other transports we call this later, for each socket we 321 * like to bind. 322 */ 323 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 324 int non_fatal = 0; 325 if (errno == EAFNOSUPPORT) 326 non_fatal = 1; 327 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 328 "Cannot create socket for `%s'", nconf->nc_netid); 329 return 1; 330 } 331 } else 332 fd = -1; 333 334 if (!__rpc_nconf2sockinfo(nconf, &si)) { 335 syslog(LOG_ERR, "Cannot get information for `%s'", 336 nconf->nc_netid); 337 return 1; 338 } 339 340 if (strcmp(nconf->nc_netid, "local") == 0) { 341 (void)memset(&sun, 0, sizeof sun); 342 sun.sun_family = AF_LOCAL; 343 #ifdef RPCBIND_RUMP 344 (void)rump_sys_unlink(_PATH_RPCBINDSOCK); 345 #else 346 (void)unlink(_PATH_RPCBINDSOCK); 347 #endif 348 (void)strlcpy(sun.sun_path, _PATH_RPCBINDSOCK, 349 sizeof(sun.sun_path)); 350 sun.sun_len = SUN_LEN(&sun); 351 addrlen = sizeof(struct sockaddr_un); 352 sa = (struct sockaddr *)&sun; 353 } else { 354 /* Get rpcbind's address on this transport */ 355 356 (void)memset(&hints, 0, sizeof hints); 357 hints.ai_flags = AI_PASSIVE; 358 hints.ai_family = si.si_af; 359 hints.ai_socktype = si.si_socktype; 360 hints.ai_protocol = si.si_proto; 361 } 362 363 if (strcmp(nconf->nc_netid, "local") != 0) { 364 char **nhp; 365 /* 366 * If no hosts were specified, just bind to INADDR_ANY. 367 * Otherwise make sure 127.0.0.1 is added to the list. 368 */ 369 nhostsbak = nhosts + 1; 370 nhp = realloc(hosts, nhostsbak * sizeof(*hosts)); 371 if (nhp == NULL) { 372 syslog(LOG_ERR, "Can't grow hosts array"); 373 return 1; 374 } 375 hosts = nhp; 376 if (nhostsbak == 1) 377 hosts[0] = __UNCONST("*"); 378 else { 379 if (hints.ai_family == AF_INET) { 380 hosts[nhostsbak - 1] = __UNCONST("127.0.0.1"); 381 } else if (hints.ai_family == AF_INET6) { 382 hosts[nhostsbak - 1] = __UNCONST("::1"); 383 } else 384 return 1; 385 } 386 387 /* 388 * Bind to specific IPs if asked to 389 */ 390 bound = 0; 391 while (nhostsbak > 0) { 392 --nhostsbak; 393 /* 394 * XXX - using RPC library internal functions. 395 */ 396 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 397 int non_fatal = 0; 398 if (errno == EAFNOSUPPORT && 399 nconf->nc_semantics != NC_TPI_CLTS) 400 non_fatal = 1; 401 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 402 "cannot create socket for %s", 403 nconf->nc_netid); 404 return 1; 405 } 406 switch (hints.ai_family) { 407 case AF_INET: 408 if (inet_pton(AF_INET, hosts[nhostsbak], 409 host_addr) == 1) { 410 hints.ai_flags &= AI_NUMERICHOST; 411 } else { 412 /* 413 * Skip if we have an AF_INET6 address. 414 */ 415 if (inet_pton(AF_INET6, 416 hosts[nhostsbak], host_addr) == 1) { 417 close(fd); 418 continue; 419 } 420 } 421 break; 422 case AF_INET6: 423 if (inet_pton(AF_INET6, hosts[nhostsbak], 424 host_addr) == 1) { 425 hints.ai_flags &= AI_NUMERICHOST; 426 } else { 427 /* 428 * Skip if we have an AF_INET address. 429 */ 430 if (inet_pton(AF_INET, hosts[nhostsbak], 431 host_addr) == 1) { 432 close(fd); 433 continue; 434 } 435 } 436 if (setsockopt(fd, IPPROTO_IPV6, 437 IPV6_V6ONLY, &on, sizeof on) < 0) { 438 syslog(LOG_ERR, 439 "can't set v6-only binding for " 440 "ipv6 socket: %m"); 441 continue; 442 } 443 break; 444 default: 445 break; 446 } 447 448 /* 449 * If no hosts were specified, just bind to INADDR_ANY 450 */ 451 if (strcmp("*", hosts[nhostsbak]) == 0) 452 hosts[nhostsbak] = NULL; 453 if (strcmp(nconf->nc_netid, "local") != 0) { 454 if ((aicode = getaddrinfo(hosts[nhostsbak], 455 servname, &hints, &res)) != 0) { 456 syslog(LOG_ERR, 457 "cannot get local address for %s: %s", 458 nconf->nc_netid, 459 gai_strerror(aicode)); 460 continue; 461 } 462 addrlen = res->ai_addrlen; 463 sa = (struct sockaddr *)res->ai_addr; 464 } 465 #ifndef RPCBIND_RUMP 466 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH); 467 #endif 468 if (bind(fd, sa, addrlen) != 0) { 469 syslog(LOG_ERR, "cannot bind %s on %s: %m", 470 (hosts[nhostsbak] == NULL) ? "*" : 471 hosts[nhostsbak], nconf->nc_netid); 472 if (res != NULL) 473 freeaddrinfo(res); 474 continue; 475 } else 476 bound = 1; 477 #ifndef RPCBIND_RUMP 478 (void)umask(oldmask); 479 #endif 480 481 /* Copy the address */ 482 taddr.addr.len = taddr.addr.maxlen = addrlen; 483 taddr.addr.buf = malloc(addrlen); 484 if (taddr.addr.buf == NULL) { 485 syslog(LOG_ERR, "%s: Cannot allocate memory", 486 __func__); 487 if (res != NULL) 488 freeaddrinfo(res); 489 return 1; 490 } 491 memcpy(taddr.addr.buf, sa, addrlen); 492 #ifdef RPCBIND_DEBUG 493 if (debugging) { 494 /* 495 * for debugging print out our universal 496 * address 497 */ 498 char *uaddr; 499 struct netbuf nb; 500 501 nb.buf = sa; 502 nb.len = nb.maxlen = sa->sa_len; 503 uaddr = taddr2uaddr(nconf, &nb); 504 (void)fprintf(stderr, 505 "rpcbind : my address is %s\n", uaddr); 506 (void)free(uaddr); 507 } 508 #endif 509 510 if (nconf->nc_semantics != NC_TPI_CLTS) 511 listen(fd, SOMAXCONN); 512 513 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 514 RPC_MAXDATASIZE, RPC_MAXDATASIZE); 515 if (my_xprt == NULL) { 516 syslog(LOG_ERR, 517 "Could not create service for `%s'", 518 nconf->nc_netid); 519 goto error; 520 } 521 } 522 if (!bound) 523 return 1; 524 } else { 525 #ifndef RPCBIND_RUMP 526 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH); 527 #endif 528 if (bind(fd, sa, addrlen) < 0) { 529 syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid); 530 if (res != NULL) 531 freeaddrinfo(res); 532 return 1; 533 } 534 #ifndef RPCBIND_RUMP 535 (void) umask(oldmask); 536 #endif 537 538 /* Copy the address */ 539 taddr.addr.len = taddr.addr.maxlen = addrlen; 540 taddr.addr.buf = malloc(addrlen); 541 if (taddr.addr.buf == NULL) { 542 syslog(LOG_ERR, "%s: Cannot allocate memory", __func__); 543 if (res != NULL) 544 freeaddrinfo(res); 545 return 1; 546 } 547 memcpy(taddr.addr.buf, sa, addrlen); 548 #ifdef RPCBIND_DEBUG 549 if (debugging) { 550 /* for debugging print out our universal address */ 551 char *uaddr; 552 struct netbuf nb; 553 554 nb.buf = sa; 555 nb.len = nb.maxlen = sa->sa_len; 556 uaddr = taddr2uaddr(nconf, &nb); 557 (void) fprintf(stderr, "rpcbind : my address is %s\n", 558 uaddr); 559 (void) free(uaddr); 560 } 561 #endif 562 563 if (nconf->nc_semantics != NC_TPI_CLTS) 564 listen(fd, SOMAXCONN); 565 566 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 567 RPC_MAXDATASIZE, RPC_MAXDATASIZE); 568 if (my_xprt == NULL) { 569 syslog(LOG_ERR, "%s: could not create service", 570 nconf->nc_netid); 571 goto error; 572 } 573 } 574 575 #ifdef PORTMAP 576 /* 577 * Register both the versions for tcp/ip, udp/ip and local. 578 */ 579 if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 && 580 (strcmp(nconf->nc_proto, NC_TCP) == 0 || 581 strcmp(nconf->nc_proto, NC_UDP) == 0)) || 582 strcmp(nconf->nc_netid, "local") == 0) { 583 struct pmaplist *pml; 584 585 if (!svc_register(my_xprt, PMAPPROG, PMAPVERS, 586 pmap_service, 0)) { 587 syslog(LOG_ERR, "Could not register on `%s'", 588 nconf->nc_netid); 589 goto error; 590 } 591 pml = malloc(sizeof(*pml)); 592 if (pml == NULL) { 593 syslog(LOG_ERR, "%s: Cannot allocate memory", __func__); 594 goto error; 595 } 596 597 pml->pml_map.pm_prog = PMAPPROG; 598 pml->pml_map.pm_vers = PMAPVERS; 599 pml->pml_map.pm_port = PMAPPORT; 600 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 601 if (tcptrans[0]) { 602 syslog(LOG_ERR, 603 "Cannot have more than one TCP transport"); 604 free(pml); 605 goto error; 606 } 607 tcptrans = strdup(nconf->nc_netid); 608 if (tcptrans == NULL) { 609 free(pml); 610 syslog(LOG_ERR, "%s: Cannot allocate memory", 611 __func__); 612 goto error; 613 } 614 pml->pml_map.pm_prot = IPPROTO_TCP; 615 616 /* Let's snarf the universal address */ 617 /* "h1.h2.h3.h4.p1.p2" */ 618 tcp_uaddr = taddr2uaddr(nconf, &taddr.addr); 619 } else if (strcmp(nconf->nc_proto, NC_UDP) == 0) { 620 if (udptrans[0]) { 621 free(pml); 622 syslog(LOG_ERR, 623 "Cannot have more than one UDP transport"); 624 goto error; 625 } 626 udptrans = strdup(nconf->nc_netid); 627 if (udptrans == NULL) { 628 free(pml); 629 syslog(LOG_ERR, "%s: Cannot allocate memory", 630 __func__); 631 goto error; 632 } 633 pml->pml_map.pm_prot = IPPROTO_UDP; 634 635 /* Let's snarf the universal address */ 636 /* "h1.h2.h3.h4.p1.p2" */ 637 udp_uaddr = taddr2uaddr(nconf, &taddr.addr); 638 } 639 #ifdef IPPROTO_ST 640 else if (strcmp(nconf->nc_netid, "local") == 0) 641 pml->pml_map.pm_prot = IPPROTO_ST; 642 #endif 643 pml->pml_next = list_pml; 644 list_pml = pml; 645 646 /* Add version 3 information */ 647 pml = malloc(sizeof(*pml)); 648 if (pml == NULL) { 649 syslog(LOG_ERR, "%s: Cannot allocate memory", __func__); 650 goto error; 651 } 652 pml->pml_map = list_pml->pml_map; 653 pml->pml_map.pm_vers = RPCBVERS; 654 pml->pml_next = list_pml; 655 list_pml = pml; 656 657 /* Add version 4 information */ 658 pml = malloc(sizeof(*pml)); 659 if (pml == NULL) { 660 syslog(LOG_ERR, "%s: Cannot allocate memory", __func__); 661 goto error; 662 } 663 pml->pml_map = list_pml->pml_map; 664 pml->pml_map.pm_vers = RPCBVERS4; 665 pml->pml_next = list_pml; 666 list_pml = pml; 667 668 /* Also add version 2 stuff to rpcbind list */ 669 rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr); 670 } 671 #endif 672 673 /* version 3 registration */ 674 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) { 675 syslog(LOG_ERR, "Could not register %s version 3", 676 nconf->nc_netid); 677 goto error; 678 } 679 rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr); 680 681 /* version 4 registration */ 682 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) { 683 syslog(LOG_ERR, "Could not register %s version 4", 684 nconf->nc_netid); 685 goto error; 686 } 687 rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr); 688 689 /* decide if bound checking works for this transport */ 690 status = add_bndlist(nconf, &taddr.addr); 691 #ifdef RPCBIND_DEBUG 692 if (debugging) { 693 if (status < 0) { 694 fprintf(stderr, "Error in finding bind status for %s\n", 695 nconf->nc_netid); 696 } else if (status == 0) { 697 fprintf(stderr, "check binding for %s\n", 698 nconf->nc_netid); 699 } else if (status > 0) { 700 fprintf(stderr, "No check binding for %s\n", 701 nconf->nc_netid); 702 } 703 } 704 #else 705 __USE(status); 706 #endif 707 /* 708 * rmtcall only supported on CLTS transports for now. 709 */ 710 if (nconf->nc_semantics == NC_TPI_CLTS) { 711 status = create_rmtcall_fd(nconf); 712 713 #ifdef RPCBIND_DEBUG 714 if (debugging) { 715 if (status < 0) { 716 fprintf(stderr, 717 "Could not create rmtcall fd for %s\n", 718 nconf->nc_netid); 719 } else { 720 fprintf(stderr, "rmtcall fd for %s is %d\n", 721 nconf->nc_netid, status); 722 } 723 } 724 #endif 725 } 726 return (0); 727 error: 728 #ifdef RPCBIND_RUMP 729 (void)rump_sys_close(fd); 730 #else 731 (void)close(fd); 732 #endif 733 return (1); 734 } 735 736 /* 737 * Create the list of addresses that we're bound to. Normally, this 738 * list is empty because we're listening on the wildcard address 739 * (nhost == 0). If -h is specified on the command line, then 740 * bound_sa will have a list of the addresses that the program binds 741 * to specifically. This function takes that list and converts them to 742 * struct sockaddr * and stores them in bound_sa. 743 */ 744 static void 745 update_bound_sa(void) 746 { 747 struct addrinfo hints, *res = NULL; 748 int i; 749 750 if (nhosts == 0) 751 return; 752 bound_sa = calloc(nhosts, sizeof(*bound_sa)); 753 if (bound_sa == NULL) 754 err(EXIT_FAILURE, "no space for bound address array"); 755 memset(&hints, 0, sizeof(hints)); 756 hints.ai_family = PF_UNSPEC; 757 for (i = 0; i < nhosts; i++) { 758 if (getaddrinfo(hosts[i], NULL, &hints, &res) != 0) 759 continue; 760 bound_sa[i] = malloc(res->ai_addrlen); 761 if (bound_sa[i] == NULL) 762 err(EXIT_FAILURE, "no space for bound address"); 763 memcpy(bound_sa[i], res->ai_addr, res->ai_addrlen); 764 } 765 } 766 767 /* 768 * Match the sa against the list of addresses we've bound to. If 769 * we've not specifically bound to anything, we match everything. 770 * Otherwise, if the IPv4 or IPv6 address matches one of the addresses 771 * in bound_sa, we return true. If not, we return false. 772 */ 773 int 774 listen_addr(const struct sockaddr *sa) 775 { 776 int i; 777 778 /* 779 * If nhosts == 0, then there were no -h options on the 780 * command line, so all addresses are addresses we're 781 * listening to. 782 */ 783 if (nhosts == 0) 784 return 1; 785 for (i = 0; i < nhosts; i++) { 786 if (bound_sa[i] == NULL || 787 sa->sa_family != bound_sa[i]->sa_family) 788 continue; 789 switch (sa->sa_family) { 790 case AF_INET: 791 if (memcmp(&SA2SINADDR(sa), &SA2SINADDR(bound_sa[i]), 792 sizeof(struct in_addr)) == 0) 793 return (1); 794 break; 795 #ifdef INET6 796 case AF_INET6: 797 if (memcmp(&SA2SIN6ADDR(sa), &SA2SIN6ADDR(bound_sa[i]), 798 sizeof(struct in6_addr)) == 0) 799 return (1); 800 break; 801 #endif 802 default: 803 break; 804 } 805 } 806 return (0); 807 } 808 809 static void 810 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf, 811 struct netbuf *addr) 812 { 813 rpcblist_ptr rbl; 814 815 rbl = calloc(1, sizeof(*rbl)); 816 if (rbl == NULL) { 817 syslog(LOG_ERR, "%s: Cannot allocate memory", __func__); 818 return; 819 } 820 821 rbl->rpcb_map.r_prog = prog; 822 rbl->rpcb_map.r_vers = vers; 823 rbl->rpcb_map.r_netid = strdup(nconf->nc_netid); 824 rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr); 825 rbl->rpcb_map.r_owner = strdup(rpcbind_superuser); 826 if (rbl->rpcb_map.r_netid == NULL || 827 rbl->rpcb_map.r_addr == NULL || 828 rbl->rpcb_map.r_owner == NULL) 829 { 830 free(rbl->rpcb_map.r_netid); 831 free(rbl->rpcb_map.r_addr); 832 free(rbl->rpcb_map.r_owner); 833 free(rbl); 834 syslog(LOG_ERR, "%s: Cannot allocate memory", __func__); 835 return; 836 } 837 rbl->rpcb_next = list_rbl; /* Attach to global list */ 838 list_rbl = rbl; 839 } 840 841 /* 842 * Catch the signal and die 843 */ 844 static void 845 terminate(int signum __unused) 846 { 847 #ifndef RPCBIND_RUMP 848 close(rpcbindlockfd); 849 #endif 850 #ifdef WARMSTART 851 syslog(LOG_ERR, 852 "rpcbind terminating on signal %d. Restart with \"rpcbind -w\"", 853 signum); 854 write_warmstart(); /* Dump yourself */ 855 #endif 856 #ifdef RPCBIND_RUMP 857 exit(2); 858 #else 859 exit(EXIT_FAILURE); 860 #endif 861 } 862 863 void 864 rpcbind_abort(void) 865 { 866 #ifdef WARMSTART 867 write_warmstart(); /* Dump yourself */ 868 #endif 869 abort(); 870 } 871 872 #ifndef RPCBIND_RUMP 873 /* get command line options */ 874 static void 875 parseargs(int argc, char *argv[]) 876 { 877 int c; 878 879 #ifdef WARMSTART 880 #define WSOP "w" 881 #else 882 #define WSOP "" 883 #endif 884 #ifdef LIBWRAP 885 #define WRAPOP "W" 886 #else 887 #define WRAPOP "" 888 #endif 889 while ((c = getopt(argc, argv, "6adh:iLls" WRAPOP WSOP)) != -1) { 890 switch (c) { 891 case '6': 892 ipv6_only = 1; 893 break; 894 case 'a': 895 doabort = 1; /* when debugging, do an abort on */ 896 break; /* errors; for rpcbind developers */ 897 /* only! */ 898 case 'd': 899 debugging = 1; 900 break; 901 case 'h': 902 ++nhosts; 903 hosts = realloc(hosts, nhosts * sizeof(*hosts)); 904 if (hosts == NULL) 905 err(EXIT_FAILURE, "Can't allocate host array"); 906 hosts[nhosts - 1] = strdup(optarg); 907 if (hosts[nhosts - 1] == NULL) 908 err(EXIT_FAILURE, "Can't allocate host"); 909 break; 910 case 'i': 911 insecure = 1; 912 break; 913 case 'L': 914 oldstyle_local = 1; 915 break; 916 case 'l': 917 verboselog = 1; 918 break; 919 case 's': 920 runasdaemon = 1; 921 break; 922 #ifdef LIBWRAP 923 case 'W': 924 libwrap = 1; 925 break; 926 #endif 927 #ifdef WARMSTART 928 case 'w': 929 warmstart = 1; 930 break; 931 #endif 932 default: /* error */ 933 fprintf(stderr, "usage: rpcbind [-Idwils]\n"); 934 fprintf(stderr, 935 "Usage: %s [-6adiLls%s%s] [-h bindip]\n", 936 getprogname(), WRAPOP, WSOP); 937 exit(EXIT_FAILURE); 938 } 939 } 940 if (doabort && !debugging) { 941 fprintf(stderr, 942 "-a (abort) specified without -d (debugging) -- ignored.\n"); 943 doabort = 0; 944 } 945 #undef WRAPOP 946 #undef WSOP 947 } 948 #endif 949 950 void 951 reap(int dummy __unused) 952 { 953 int save_errno = errno; 954 955 while (wait3(NULL, WNOHANG, NULL) > 0) 956 ; 957 errno = save_errno; 958 } 959 960 void 961 toggle_verboselog(int dummy __unused) 962 { 963 verboselog = !verboselog; 964 } 965