1 /* $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl Exp $ */ 2 /* $FreeBSD$ */ 3 4 /* 5 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 6 * unrestricted use provided that this legend is included on all tape 7 * media and as a part of the software program in whole or part. Users 8 * may copy or modify Sun RPC without charge, but are not authorized 9 * to license or distribute it to anyone else except as part of a product or 10 * program developed by the user. 11 * 12 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 13 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 14 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 15 * 16 * Sun RPC is provided with no support and without any obligation on the 17 * part of Sun Microsystems, Inc. to assist in its use, correction, 18 * modification or enhancement. 19 * 20 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 21 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 22 * OR ANY PART THEREOF. 23 * 24 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 25 * or profits or other special, indirect and consequential damages, even if 26 * Sun has been advised of the possibility of such damages. 27 * 28 * Sun Microsystems, Inc. 29 * 2550 Garcia Avenue 30 * Mountain View, California 94043 31 */ 32 /* 33 * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc. 34 */ 35 36 /* #ident "@(#)rpcbind.c 1.19 94/04/25 SMI" */ 37 38 #if 0 39 #ifndef lint 40 static char sccsid[] = "@(#)rpcbind.c 1.35 89/04/21 Copyr 1984 Sun Micro"; 41 #endif 42 #endif 43 44 /* 45 * rpcbind.c 46 * Implements the program, version to address mapping for rpc. 47 * 48 */ 49 50 #include <sys/types.h> 51 #include <sys/stat.h> 52 #include <sys/errno.h> 53 #include <sys/time.h> 54 #include <sys/resource.h> 55 #include <sys/wait.h> 56 #include <sys/signal.h> 57 #include <sys/socket.h> 58 #include <sys/un.h> 59 #include <rpc/rpc.h> 60 #include <rpc/rpc_com.h> 61 #ifdef PORTMAP 62 #include <netinet/in.h> 63 #endif 64 #include <arpa/inet.h> 65 #include <fcntl.h> 66 #include <netdb.h> 67 #include <stdio.h> 68 #include <netconfig.h> 69 #include <stdlib.h> 70 #include <unistd.h> 71 #include <syslog.h> 72 #include <err.h> 73 #include <libutil.h> 74 #include <pwd.h> 75 #include <string.h> 76 #include <errno.h> 77 #include "rpcbind.h" 78 79 /* Global variables */ 80 int debugging = 0; /* Tell me what's going on */ 81 int doabort = 0; /* When debugging, do an abort on errors */ 82 rpcblist_ptr list_rbl; /* A list of version 3/4 rpcbind services */ 83 84 /* who to suid to if -s is given */ 85 #define RUN_AS "daemon" 86 87 #define RPCBINDDLOCK "/var/run/rpcbind.lock" 88 89 int runasdaemon = 0; 90 int insecure = 0; 91 int oldstyle_local = 0; 92 int verboselog = 0; 93 94 char **hosts = NULL; 95 struct sockaddr **bound_sa; 96 int ipv6_only = 0; 97 int nhosts = 0; 98 int on = 1; 99 int rpcbindlockfd; 100 101 #ifdef WARMSTART 102 /* Local Variable */ 103 static int warmstart = 0; /* Grab an old copy of registrations. */ 104 #endif 105 106 #ifdef PORTMAP 107 struct pmaplist *list_pml; /* A list of version 2 rpcbind services */ 108 char *udptrans; /* Name of UDP transport */ 109 char *tcptrans; /* Name of TCP transport */ 110 char *udp_uaddr; /* Universal UDP address */ 111 char *tcp_uaddr; /* Universal TCP address */ 112 #endif 113 static char servname[] = "rpcbind"; 114 static char superuser[] = "superuser"; 115 116 int main(int, char *[]); 117 118 static int init_transport(struct netconfig *); 119 static void rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *, 120 struct netbuf *); 121 static void terminate(int); 122 static void parseargs(int, char *[]); 123 static void update_bound_sa(void); 124 125 int 126 main(int argc, char *argv[]) 127 { 128 struct netconfig *nconf; 129 void *nc_handle; /* Net config handle */ 130 struct rlimit rl; 131 int maxrec = RPC_MAXDATASIZE; 132 133 parseargs(argc, argv); 134 135 update_bound_sa(); 136 137 /* Check that another rpcbind isn't already running. */ 138 if ((rpcbindlockfd = (open(RPCBINDDLOCK, 139 O_RDONLY|O_CREAT, 0444))) == -1) 140 err(1, "%s", RPCBINDDLOCK); 141 142 if(flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) 143 errx(1, "another rpcbind is already running. Aborting"); 144 145 getrlimit(RLIMIT_NOFILE, &rl); 146 if (rl.rlim_cur < 128) { 147 if (rl.rlim_max <= 128) 148 rl.rlim_cur = rl.rlim_max; 149 else 150 rl.rlim_cur = 128; 151 setrlimit(RLIMIT_NOFILE, &rl); 152 } 153 openlog("rpcbind", LOG_CONS, LOG_DAEMON); 154 if (geteuid()) { /* This command allowed only to root */ 155 fprintf(stderr, "Sorry. You are not superuser\n"); 156 exit(1); 157 } 158 nc_handle = setnetconfig(); /* open netconfig file */ 159 if (nc_handle == NULL) { 160 syslog(LOG_ERR, "could not read /etc/netconfig"); 161 exit(1); 162 } 163 #ifdef PORTMAP 164 udptrans = ""; 165 tcptrans = ""; 166 #endif 167 168 nconf = getnetconfigent("local"); 169 if (nconf == NULL) 170 nconf = getnetconfigent("unix"); 171 if (nconf == NULL) { 172 syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]); 173 exit(1); 174 } 175 176 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 177 178 init_transport(nconf); 179 180 while ((nconf = getnetconfig(nc_handle))) { 181 if (nconf->nc_flag & NC_VISIBLE) { 182 if (ipv6_only == 1 && strcmp(nconf->nc_protofmly, 183 "inet") == 0) { 184 /* DO NOTHING */ 185 } else 186 init_transport(nconf); 187 } 188 } 189 endnetconfig(nc_handle); 190 191 /* catch the usual termination signals for graceful exit */ 192 (void) signal(SIGCHLD, reap); 193 (void) signal(SIGINT, terminate); 194 (void) signal(SIGTERM, terminate); 195 (void) signal(SIGQUIT, terminate); 196 /* ignore others that could get sent */ 197 (void) signal(SIGPIPE, SIG_IGN); 198 (void) signal(SIGHUP, SIG_IGN); 199 (void) signal(SIGUSR1, SIG_IGN); 200 (void) signal(SIGUSR2, SIG_IGN); 201 #ifdef WARMSTART 202 if (warmstart) { 203 read_warmstart(); 204 } 205 #endif 206 if (debugging) { 207 printf("rpcbind debugging enabled."); 208 if (doabort) { 209 printf(" Will abort on errors!\n"); 210 } else { 211 printf("\n"); 212 } 213 } else { 214 if (daemon(0, 0)) 215 err(1, "fork failed"); 216 } 217 218 if (runasdaemon) { 219 struct passwd *p; 220 221 if((p = getpwnam(RUN_AS)) == NULL) { 222 syslog(LOG_ERR, "cannot get uid of daemon: %m"); 223 exit(1); 224 } 225 if (setuid(p->pw_uid) == -1) { 226 syslog(LOG_ERR, "setuid to daemon failed: %m"); 227 exit(1); 228 } 229 } 230 231 network_init(); 232 233 my_svc_run(); 234 syslog(LOG_ERR, "svc_run returned unexpectedly"); 235 rpcbind_abort(); 236 /* NOTREACHED */ 237 238 return 0; 239 } 240 241 /* 242 * Adds the entry into the rpcbind database. 243 * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also 244 * Returns 0 if succeeds, else fails 245 */ 246 static int 247 init_transport(struct netconfig *nconf) 248 { 249 int fd; 250 struct t_bind taddr; 251 struct addrinfo hints, *res = NULL; 252 struct __rpc_sockinfo si; 253 SVCXPRT *my_xprt; 254 int status; /* bound checking ? */ 255 int aicode; 256 int addrlen; 257 int nhostsbak; 258 int bound; 259 struct sockaddr *sa; 260 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 261 struct sockaddr_un sun; 262 mode_t oldmask; 263 264 if ((nconf->nc_semantics != NC_TPI_CLTS) && 265 (nconf->nc_semantics != NC_TPI_COTS) && 266 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 267 return (1); /* not my type */ 268 #ifdef ND_DEBUG 269 if (debugging) { 270 int i; 271 char **s; 272 273 (void)fprintf(stderr, "%s: %ld lookup routines :\n", 274 nconf->nc_netid, nconf->nc_nlookups); 275 for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups; 276 i++, s++) 277 fprintf(stderr, "[%d] - %s\n", i, *s); 278 } 279 #endif 280 281 /* 282 * XXX - using RPC library internal functions. 283 */ 284 if ((strcmp(nconf->nc_netid, "local") == 0) || 285 (strcmp(nconf->nc_netid, "unix") == 0)) { 286 /* 287 * For other transports we call this later, for each socket we 288 * like to bind. 289 */ 290 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 291 int non_fatal = 0; 292 if (errno == EAFNOSUPPORT) 293 non_fatal = 1; 294 syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s", 295 nconf->nc_netid); 296 return (1); 297 } 298 } 299 300 if (!__rpc_nconf2sockinfo(nconf, &si)) { 301 syslog(LOG_ERR, "cannot get information for %s", 302 nconf->nc_netid); 303 return (1); 304 } 305 306 if ((strcmp(nconf->nc_netid, "local") == 0) || 307 (strcmp(nconf->nc_netid, "unix") == 0)) { 308 memset(&sun, 0, sizeof sun); 309 sun.sun_family = AF_LOCAL; 310 unlink(_PATH_RPCBINDSOCK); 311 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 312 sun.sun_len = SUN_LEN(&sun); 313 addrlen = sizeof (struct sockaddr_un); 314 sa = (struct sockaddr *)&sun; 315 } else { 316 /* Get rpcbind's address on this transport */ 317 318 memset(&hints, 0, sizeof hints); 319 hints.ai_flags = AI_PASSIVE; 320 hints.ai_family = si.si_af; 321 hints.ai_socktype = si.si_socktype; 322 hints.ai_protocol = si.si_proto; 323 } 324 325 if ((strcmp(nconf->nc_netid, "local") != 0) && 326 (strcmp(nconf->nc_netid, "unix") != 0)) { 327 /* 328 * If no hosts were specified, just bind to INADDR_ANY. 329 * Otherwise make sure 127.0.0.1 is added to the list. 330 */ 331 nhostsbak = nhosts + 1; 332 hosts = realloc(hosts, nhostsbak * sizeof(char *)); 333 if (nhostsbak == 1) 334 hosts[0] = "*"; 335 else { 336 if (hints.ai_family == AF_INET) { 337 hosts[nhostsbak - 1] = "127.0.0.1"; 338 } else if (hints.ai_family == AF_INET6) { 339 hosts[nhostsbak - 1] = "::1"; 340 } else 341 return 1; 342 } 343 344 /* 345 * Bind to specific IPs if asked to 346 */ 347 bound = 0; 348 while (nhostsbak > 0) { 349 --nhostsbak; 350 /* 351 * XXX - using RPC library internal functions. 352 */ 353 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 354 int non_fatal = 0; 355 if (errno == EAFNOSUPPORT && 356 nconf->nc_semantics != NC_TPI_CLTS) 357 non_fatal = 1; 358 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 359 "cannot create socket for %s", nconf->nc_netid); 360 return (1); 361 } 362 switch (hints.ai_family) { 363 case AF_INET: 364 if (inet_pton(AF_INET, hosts[nhostsbak], 365 host_addr) == 1) { 366 hints.ai_flags &= AI_NUMERICHOST; 367 } else { 368 /* 369 * Skip if we have an AF_INET6 address. 370 */ 371 if (inet_pton(AF_INET6, 372 hosts[nhostsbak], host_addr) == 1) { 373 close(fd); 374 continue; 375 } 376 } 377 break; 378 case AF_INET6: 379 if (inet_pton(AF_INET6, hosts[nhostsbak], 380 host_addr) == 1) { 381 hints.ai_flags &= AI_NUMERICHOST; 382 } else { 383 /* 384 * Skip if we have an AF_INET address. 385 */ 386 if (inet_pton(AF_INET, hosts[nhostsbak], 387 host_addr) == 1) { 388 close(fd); 389 continue; 390 } 391 } 392 if (setsockopt(fd, IPPROTO_IPV6, 393 IPV6_V6ONLY, &on, sizeof on) < 0) { 394 syslog(LOG_ERR, 395 "can't set v6-only binding for " 396 "ipv6 socket: %m"); 397 continue; 398 } 399 break; 400 default: 401 break; 402 } 403 404 /* 405 * If no hosts were specified, just bind to INADDR_ANY 406 */ 407 if (strcmp("*", hosts[nhostsbak]) == 0) 408 hosts[nhostsbak] = NULL; 409 if ((strcmp(nconf->nc_netid, "local") != 0) && 410 (strcmp(nconf->nc_netid, "unix") != 0)) { 411 if ((aicode = getaddrinfo(hosts[nhostsbak], 412 servname, &hints, &res)) != 0) { 413 syslog(LOG_ERR, 414 "cannot get local address for %s: %s", 415 nconf->nc_netid, gai_strerror(aicode)); 416 continue; 417 } 418 addrlen = res->ai_addrlen; 419 sa = (struct sockaddr *)res->ai_addr; 420 } 421 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH); 422 if (bind(fd, sa, addrlen) != 0) { 423 syslog(LOG_ERR, "cannot bind %s on %s: %m", 424 (hosts[nhostsbak] == NULL) ? "*" : 425 hosts[nhostsbak], nconf->nc_netid); 426 if (res != NULL) 427 freeaddrinfo(res); 428 continue; 429 } else 430 bound = 1; 431 (void)umask(oldmask); 432 433 /* Copy the address */ 434 taddr.addr.len = taddr.addr.maxlen = addrlen; 435 taddr.addr.buf = malloc(addrlen); 436 if (taddr.addr.buf == NULL) { 437 syslog(LOG_ERR, 438 "cannot allocate memory for %s address", 439 nconf->nc_netid); 440 if (res != NULL) 441 freeaddrinfo(res); 442 return 1; 443 } 444 memcpy(taddr.addr.buf, sa, addrlen); 445 #ifdef ND_DEBUG 446 if (debugging) { 447 /* 448 * for debugging print out our universal 449 * address 450 */ 451 char *uaddr; 452 struct netbuf nb; 453 454 nb.buf = sa; 455 nb.len = nb.maxlen = sa->sa_len; 456 uaddr = taddr2uaddr(nconf, &nb); 457 (void)fprintf(stderr, 458 "rpcbind : my address is %s\n", uaddr); 459 (void)free(uaddr); 460 } 461 #endif 462 463 if (nconf->nc_semantics != NC_TPI_CLTS) 464 listen(fd, SOMAXCONN); 465 466 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 467 RPC_MAXDATASIZE, RPC_MAXDATASIZE); 468 if (my_xprt == (SVCXPRT *)NULL) { 469 syslog(LOG_ERR, "%s: could not create service", 470 nconf->nc_netid); 471 goto error; 472 } 473 } 474 if (!bound) 475 return 1; 476 } else { 477 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH); 478 if (bind(fd, sa, addrlen) < 0) { 479 syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid); 480 if (res != NULL) 481 freeaddrinfo(res); 482 return 1; 483 } 484 (void) umask(oldmask); 485 486 /* Copy the address */ 487 taddr.addr.len = taddr.addr.maxlen = addrlen; 488 taddr.addr.buf = malloc(addrlen); 489 if (taddr.addr.buf == NULL) { 490 syslog(LOG_ERR, "cannot allocate memory for %s address", 491 nconf->nc_netid); 492 if (res != NULL) 493 freeaddrinfo(res); 494 return 1; 495 } 496 memcpy(taddr.addr.buf, sa, addrlen); 497 #ifdef ND_DEBUG 498 if (debugging) { 499 /* for debugging print out our universal address */ 500 char *uaddr; 501 struct netbuf nb; 502 503 nb.buf = sa; 504 nb.len = nb.maxlen = sa->sa_len; 505 uaddr = taddr2uaddr(nconf, &nb); 506 (void) fprintf(stderr, "rpcbind : my address is %s\n", 507 uaddr); 508 (void) free(uaddr); 509 } 510 #endif 511 512 if (nconf->nc_semantics != NC_TPI_CLTS) 513 listen(fd, SOMAXCONN); 514 515 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 516 RPC_MAXDATASIZE, RPC_MAXDATASIZE); 517 if (my_xprt == (SVCXPRT *)NULL) { 518 syslog(LOG_ERR, "%s: could not create service", 519 nconf->nc_netid); 520 goto error; 521 } 522 } 523 524 #ifdef PORTMAP 525 /* 526 * Register both the versions for tcp/ip, udp/ip and local. 527 */ 528 if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 && 529 (strcmp(nconf->nc_proto, NC_TCP) == 0 || 530 strcmp(nconf->nc_proto, NC_UDP) == 0)) || 531 (strcmp(nconf->nc_netid, "unix") == 0) || 532 (strcmp(nconf->nc_netid, "local") == 0)) { 533 struct pmaplist *pml; 534 535 if (!svc_register(my_xprt, PMAPPROG, PMAPVERS, 536 pmap_service, 0)) { 537 syslog(LOG_ERR, "could not register on %s", 538 nconf->nc_netid); 539 goto error; 540 } 541 pml = malloc(sizeof (struct pmaplist)); 542 if (pml == NULL) { 543 syslog(LOG_ERR, "no memory!"); 544 exit(1); 545 } 546 pml->pml_map.pm_prog = PMAPPROG; 547 pml->pml_map.pm_vers = PMAPVERS; 548 pml->pml_map.pm_port = PMAPPORT; 549 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 550 if (tcptrans[0]) { 551 syslog(LOG_ERR, 552 "cannot have more than one TCP transport"); 553 goto error; 554 } 555 tcptrans = strdup(nconf->nc_netid); 556 pml->pml_map.pm_prot = IPPROTO_TCP; 557 558 /* Let's snarf the universal address */ 559 /* "h1.h2.h3.h4.p1.p2" */ 560 tcp_uaddr = taddr2uaddr(nconf, &taddr.addr); 561 } else if (strcmp(nconf->nc_proto, NC_UDP) == 0) { 562 if (udptrans[0]) { 563 syslog(LOG_ERR, 564 "cannot have more than one UDP transport"); 565 goto error; 566 } 567 udptrans = strdup(nconf->nc_netid); 568 pml->pml_map.pm_prot = IPPROTO_UDP; 569 570 /* Let's snarf the universal address */ 571 /* "h1.h2.h3.h4.p1.p2" */ 572 udp_uaddr = taddr2uaddr(nconf, &taddr.addr); 573 } else if (strcmp(nconf->nc_netid, "local") == 0) 574 pml->pml_map.pm_prot = IPPROTO_ST; 575 else if (strcmp(nconf->nc_netid, "unix") == 0) 576 pml->pml_map.pm_prot = IPPROTO_ST; 577 pml->pml_next = list_pml; 578 list_pml = pml; 579 580 /* Add version 3 information */ 581 pml = malloc(sizeof (struct pmaplist)); 582 if (pml == NULL) { 583 syslog(LOG_ERR, "no memory!"); 584 exit(1); 585 } 586 pml->pml_map = list_pml->pml_map; 587 pml->pml_map.pm_vers = RPCBVERS; 588 pml->pml_next = list_pml; 589 list_pml = pml; 590 591 /* Add version 4 information */ 592 pml = malloc (sizeof (struct pmaplist)); 593 if (pml == NULL) { 594 syslog(LOG_ERR, "no memory!"); 595 exit(1); 596 } 597 pml->pml_map = list_pml->pml_map; 598 pml->pml_map.pm_vers = RPCBVERS4; 599 pml->pml_next = list_pml; 600 list_pml = pml; 601 602 /* Also add version 2 stuff to rpcbind list */ 603 rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr); 604 } 605 #endif 606 607 /* version 3 registration */ 608 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) { 609 syslog(LOG_ERR, "could not register %s version 3", 610 nconf->nc_netid); 611 goto error; 612 } 613 rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr); 614 615 /* version 4 registration */ 616 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) { 617 syslog(LOG_ERR, "could not register %s version 4", 618 nconf->nc_netid); 619 goto error; 620 } 621 rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr); 622 623 /* decide if bound checking works for this transport */ 624 status = add_bndlist(nconf, &taddr.addr); 625 #ifdef BIND_DEBUG 626 if (debugging) { 627 if (status < 0) { 628 fprintf(stderr, "Error in finding bind status for %s\n", 629 nconf->nc_netid); 630 } else if (status == 0) { 631 fprintf(stderr, "check binding for %s\n", 632 nconf->nc_netid); 633 } else if (status > 0) { 634 fprintf(stderr, "No check binding for %s\n", 635 nconf->nc_netid); 636 } 637 } 638 #endif 639 /* 640 * rmtcall only supported on CLTS transports for now. 641 */ 642 if (nconf->nc_semantics == NC_TPI_CLTS) { 643 status = create_rmtcall_fd(nconf); 644 645 #ifdef BIND_DEBUG 646 if (debugging) { 647 if (status < 0) { 648 fprintf(stderr, 649 "Could not create rmtcall fd for %s\n", 650 nconf->nc_netid); 651 } else { 652 fprintf(stderr, "rmtcall fd for %s is %d\n", 653 nconf->nc_netid, status); 654 } 655 } 656 #endif 657 } 658 return (0); 659 error: 660 close(fd); 661 return (1); 662 } 663 664 /* 665 * Create the list of addresses that we're bound to. Normally, this 666 * list is empty because we're listening on the wildcard address 667 * (nhost == 0). If -h is specified on the command line, then 668 * bound_sa will have a list of the addresses that the program binds 669 * to specifically. This function takes that list and converts them to 670 * struct sockaddr * and stores them in bound_sa. 671 */ 672 static void 673 update_bound_sa(void) 674 { 675 struct addrinfo hints, *res = NULL; 676 int i; 677 678 if (nhosts == 0) 679 return; 680 bound_sa = malloc(sizeof(*bound_sa) * nhosts); 681 memset(&hints, 0, sizeof(hints)); 682 hints.ai_family = PF_UNSPEC; 683 for (i = 0; i < nhosts; i++) { 684 if (getaddrinfo(hosts[i], NULL, &hints, &res) != 0) 685 continue; 686 bound_sa[i] = malloc(res->ai_addrlen); 687 memcpy(bound_sa[i], res->ai_addr, res->ai_addrlen); 688 } 689 } 690 691 /* 692 * Match the sa against the list of addresses we've bound to. If 693 * we've not specifically bound to anything, we match everything. 694 * Otherwise, if the IPv4 or IPv6 address matches one of the addresses 695 * in bound_sa, we return true. If not, we return false. 696 */ 697 int 698 listen_addr(const struct sockaddr *sa) 699 { 700 int i; 701 702 /* 703 * If nhosts == 0, then there were no -h options on the 704 * command line, so all addresses are addresses we're 705 * listening to. 706 */ 707 if (nhosts == 0) 708 return 1; 709 for (i = 0; i < nhosts; i++) { 710 if (bound_sa[i] == NULL || 711 sa->sa_family != bound_sa[i]->sa_family) 712 continue; 713 switch (sa->sa_family) { 714 case AF_INET: 715 if (memcmp(&SA2SINADDR(sa), &SA2SINADDR(bound_sa[i]), 716 sizeof(struct in_addr)) == 0) 717 return (1); 718 break; 719 #ifdef INET6 720 case AF_INET6: 721 if (memcmp(&SA2SIN6ADDR(sa), &SA2SIN6ADDR(bound_sa[i]), 722 sizeof(struct in6_addr)) == 0) 723 return (1); 724 break; 725 #endif 726 default: 727 break; 728 } 729 } 730 return (0); 731 } 732 733 static void 734 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf, 735 struct netbuf *addr) 736 { 737 rpcblist_ptr rbl; 738 739 rbl = malloc(sizeof (rpcblist)); 740 if (rbl == NULL) { 741 syslog(LOG_ERR, "no memory!"); 742 exit(1); 743 } 744 745 rbl->rpcb_map.r_prog = prog; 746 rbl->rpcb_map.r_vers = vers; 747 rbl->rpcb_map.r_netid = strdup(nconf->nc_netid); 748 rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr); 749 rbl->rpcb_map.r_owner = strdup(superuser); 750 rbl->rpcb_next = list_rbl; /* Attach to global list */ 751 list_rbl = rbl; 752 } 753 754 /* 755 * Catch the signal and die 756 */ 757 static void 758 terminate(int dummy __unused) 759 { 760 close(rpcbindlockfd); 761 #ifdef WARMSTART 762 syslog(LOG_ERR, 763 "rpcbind terminating on signal. Restart with \"rpcbind -w\""); 764 write_warmstart(); /* Dump yourself */ 765 #endif 766 exit(2); 767 } 768 769 void 770 rpcbind_abort(void) 771 { 772 #ifdef WARMSTART 773 write_warmstart(); /* Dump yourself */ 774 #endif 775 abort(); 776 } 777 778 /* get command line options */ 779 static void 780 parseargs(int argc, char *argv[]) 781 { 782 int c; 783 784 #ifdef WARMSTART 785 #define WSOP "w" 786 #else 787 #define WSOP "" 788 #endif 789 while ((c = getopt(argc, argv, "6adh:iLls" WSOP)) != -1) { 790 switch (c) { 791 case '6': 792 ipv6_only = 1; 793 break; 794 case 'a': 795 doabort = 1; /* when debugging, do an abort on */ 796 break; /* errors; for rpcbind developers */ 797 /* only! */ 798 case 'd': 799 debugging = 1; 800 break; 801 case 'h': 802 ++nhosts; 803 hosts = realloc(hosts, nhosts * sizeof(char *)); 804 if (hosts == NULL) 805 errx(1, "Out of memory"); 806 hosts[nhosts - 1] = strdup(optarg); 807 if (hosts[nhosts - 1] == NULL) 808 errx(1, "Out of memory"); 809 break; 810 case 'i': 811 insecure = 1; 812 break; 813 case 'L': 814 oldstyle_local = 1; 815 break; 816 case 'l': 817 verboselog = 1; 818 break; 819 case 's': 820 runasdaemon = 1; 821 break; 822 #ifdef WARMSTART 823 case 'w': 824 warmstart = 1; 825 break; 826 #endif 827 default: /* error */ 828 fprintf(stderr, 829 "usage: rpcbind [-6adiLls%s] [-h bindip]\n", 830 WSOP); 831 exit (1); 832 } 833 } 834 if (doabort && !debugging) { 835 fprintf(stderr, 836 "-a (abort) specified without -d (debugging) -- ignored.\n"); 837 doabort = 0; 838 } 839 #undef WSOP 840 } 841 842 void 843 reap(int dummy __unused) 844 { 845 int save_errno = errno; 846 847 while (wait3(NULL, WNOHANG, NULL) > 0) 848 ; 849 errno = save_errno; 850 } 851 852 void 853 toggle_verboselog(int dummy __unused) 854 { 855 verboselog = !verboselog; 856 } 857