1 /* $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 /* 33 * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc. 34 */ 35 36 /* 37 * rpcbind.c 38 * Implements the program, version to address mapping for rpc. 39 * 40 */ 41 42 #include <sys/types.h> 43 #include <sys/stat.h> 44 #include <sys/errno.h> 45 #include <sys/time.h> 46 #include <sys/resource.h> 47 #include <sys/wait.h> 48 #include <sys/signal.h> 49 #include <sys/socket.h> 50 #include <sys/un.h> 51 #include <rpc/rpc.h> 52 #include <rpc/rpc_com.h> 53 #ifdef PORTMAP 54 #include <netinet/in.h> 55 #endif 56 #include <arpa/inet.h> 57 #include <fcntl.h> 58 #include <netdb.h> 59 #include <stdio.h> 60 #include <netconfig.h> 61 #include <stdlib.h> 62 #include <unistd.h> 63 #include <syslog.h> 64 #include <err.h> 65 #include <pwd.h> 66 #include <string.h> 67 #include <errno.h> 68 #include "rpcbind.h" 69 70 /* Global variables */ 71 int debugging = 0; /* Tell me what's going on */ 72 int doabort = 0; /* When debugging, do an abort on errors */ 73 int terminate_rfd; /* Pipefd to wake on signal */ 74 volatile sig_atomic_t doterminate = 0; /* Terminal signal received */ 75 rpcblist_ptr list_rbl; /* A list of version 3/4 rpcbind services */ 76 int rpcbindlockfd; 77 78 /* who to suid to if -s is given */ 79 #define RUN_AS "daemon" 80 81 #define RPCBINDDLOCK "/var/run/rpcbind.lock" 82 83 static int runasdaemon = 0; 84 int insecure = 0; 85 int oldstyle_local = 0; 86 #ifdef LIBWRAP 87 int libwrap = 0; 88 #endif 89 int nofork = 0; 90 int verboselog = 0; 91 int nobind_localhost = 0; 92 93 static char **hosts = NULL; 94 static struct sockaddr **bound_sa; 95 static int ipv6_only = 0; 96 static int nhosts = 0; 97 static int on = 1; 98 static int terminate_wfd; 99 100 #ifdef WARMSTART 101 /* Local Variable */ 102 static int warmstart = 0; /* Grab an old copy of registrations. */ 103 #endif 104 105 #ifdef PORTMAP 106 struct pmaplist *list_pml; /* A list of version 2 rpcbind services */ 107 char *udptrans; /* Name of UDP transport */ 108 char *tcptrans; /* Name of TCP transport */ 109 char *udp_uaddr; /* Universal UDP address */ 110 char *tcp_uaddr; /* Universal TCP address */ 111 #endif 112 static char servname[] = "rpcbind"; 113 static char superuser[] = "superuser"; 114 115 int main(int, char *[]); 116 117 static int init_transport(struct netconfig *); 118 static void rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *, 119 struct netbuf *); 120 static void terminate(int); 121 static void parseargs(int, char *[]); 122 static void update_bound_sa(void); 123 124 int 125 main(int argc, char *argv[]) 126 { 127 struct netconfig *nconf; 128 void *nc_handle; /* Net config handle */ 129 struct rlimit rl; 130 int maxrec = RPC_MAXDATASIZE; 131 int error, fds[2]; 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 /* 192 * Allocate pipe fd to wake main thread from signal handler in non-racy 193 * way. 194 */ 195 error = pipe(fds); 196 if (error != 0) 197 err(1, "pipe failed"); 198 terminate_rfd = fds[0]; 199 terminate_wfd = fds[1]; 200 201 /* catch the usual termination signals for graceful exit */ 202 (void) signal(SIGCHLD, reap); 203 (void) signal(SIGINT, terminate); 204 (void) signal(SIGTERM, terminate); 205 (void) signal(SIGQUIT, terminate); 206 /* ignore others that could get sent */ 207 (void) signal(SIGPIPE, SIG_IGN); 208 (void) signal(SIGHUP, SIG_IGN); 209 (void) signal(SIGUSR1, SIG_IGN); 210 (void) signal(SIGUSR2, SIG_IGN); 211 #ifdef WARMSTART 212 if (warmstart) { 213 read_warmstart(); 214 } 215 #endif 216 if (debugging) { 217 printf("rpcbind debugging enabled."); 218 if (doabort) { 219 printf(" Will abort on errors!\n"); 220 } else { 221 printf("\n"); 222 } 223 } else if (!nofork) { 224 if (daemon(0, 0)) 225 err(1, "fork failed"); 226 } 227 228 if (runasdaemon) { 229 struct passwd *p; 230 231 if((p = getpwnam(RUN_AS)) == NULL) { 232 syslog(LOG_ERR, "cannot get uid of daemon: %m"); 233 exit(1); 234 } 235 if (setuid(p->pw_uid) == -1) { 236 syslog(LOG_ERR, "setuid to daemon failed: %m"); 237 exit(1); 238 } 239 } 240 241 network_init(); 242 243 my_svc_run(); 244 syslog(LOG_ERR, "svc_run returned unexpectedly"); 245 rpcbind_abort(); 246 /* NOTREACHED */ 247 248 return 0; 249 } 250 251 /* 252 * Adds the entry into the rpcbind database. 253 * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also 254 * Returns 0 if succeeds, else fails 255 */ 256 static int 257 init_transport(struct netconfig *nconf) 258 { 259 int fd; 260 struct t_bind taddr; 261 struct addrinfo hints, *res = NULL; 262 struct __rpc_sockinfo si; 263 SVCXPRT *my_xprt; 264 int status; /* bound checking ? */ 265 int aicode; 266 int addrlen; 267 int nhostsbak; 268 int bound; 269 struct sockaddr *sa; 270 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 271 struct sockaddr_un sun; 272 mode_t oldmask; 273 274 if ((nconf->nc_semantics != NC_TPI_CLTS) && 275 (nconf->nc_semantics != NC_TPI_COTS) && 276 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 277 return (1); /* not my type */ 278 #ifdef ND_DEBUG 279 if (debugging) { 280 int i; 281 char **s; 282 283 (void)fprintf(stderr, "%s: %ld lookup routines :\n", 284 nconf->nc_netid, nconf->nc_nlookups); 285 for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups; 286 i++, s++) 287 fprintf(stderr, "[%d] - %s\n", i, *s); 288 } 289 #endif 290 291 /* 292 * XXX - using RPC library internal functions. 293 */ 294 if ((strcmp(nconf->nc_netid, "local") == 0) || 295 (strcmp(nconf->nc_netid, "unix") == 0)) { 296 /* 297 * For other transports we call this later, for each socket we 298 * like to bind. 299 */ 300 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 301 int non_fatal = 0; 302 if (errno == EAFNOSUPPORT) 303 non_fatal = 1; 304 syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s", 305 nconf->nc_netid); 306 return (1); 307 } 308 } 309 310 if (!__rpc_nconf2sockinfo(nconf, &si)) { 311 syslog(LOG_ERR, "cannot get information for %s", 312 nconf->nc_netid); 313 return (1); 314 } 315 316 if ((strcmp(nconf->nc_netid, "local") == 0) || 317 (strcmp(nconf->nc_netid, "unix") == 0)) { 318 memset(&sun, 0, sizeof sun); 319 sun.sun_family = AF_LOCAL; 320 unlink(_PATH_RPCBINDSOCK); 321 strcpy(sun.sun_path, _PATH_RPCBINDSOCK); 322 sun.sun_len = SUN_LEN(&sun); 323 addrlen = sizeof (struct sockaddr_un); 324 sa = (struct sockaddr *)&sun; 325 } else { 326 /* Get rpcbind's address on this transport */ 327 328 memset(&hints, 0, sizeof hints); 329 hints.ai_flags = AI_PASSIVE; 330 hints.ai_family = si.si_af; 331 hints.ai_socktype = si.si_socktype; 332 hints.ai_protocol = si.si_proto; 333 } 334 335 if ((strcmp(nconf->nc_netid, "local") != 0) && 336 (strcmp(nconf->nc_netid, "unix") != 0)) { 337 /* 338 * If no hosts were specified, just bind to INADDR_ANY. 339 * Otherwise make sure 127.0.0.1 is added to the list. 340 */ 341 nhostsbak = nhosts + 1; 342 hosts = realloc(hosts, nhostsbak * sizeof(char *)); 343 if (nhostsbak == 1) 344 hosts[0] = "*"; 345 else { 346 if (hints.ai_family == AF_INET && nobind_localhost == 0) { 347 hosts[nhostsbak - 1] = "127.0.0.1"; 348 } else if (hints.ai_family == AF_INET6 && nobind_localhost == 0) { 349 hosts[nhostsbak - 1] = "::1"; 350 } else 351 return 1; 352 } 353 354 /* 355 * Bind to specific IPs if asked to 356 */ 357 bound = 0; 358 while (nhostsbak > 0) { 359 --nhostsbak; 360 /* 361 * XXX - using RPC library internal functions. 362 */ 363 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 364 int non_fatal = 0; 365 if (errno == EAFNOSUPPORT && 366 nconf->nc_semantics != NC_TPI_CLTS) 367 non_fatal = 1; 368 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 369 "cannot create socket for %s", nconf->nc_netid); 370 return (1); 371 } 372 switch (hints.ai_family) { 373 case AF_INET: 374 if (inet_pton(AF_INET, hosts[nhostsbak], 375 host_addr) == 1) { 376 hints.ai_flags &= AI_NUMERICHOST; 377 } else { 378 /* 379 * Skip if we have an AF_INET6 address. 380 */ 381 if (inet_pton(AF_INET6, 382 hosts[nhostsbak], host_addr) == 1) { 383 close(fd); 384 continue; 385 } 386 } 387 break; 388 case AF_INET6: 389 if (inet_pton(AF_INET6, hosts[nhostsbak], 390 host_addr) == 1) { 391 hints.ai_flags &= AI_NUMERICHOST; 392 } else { 393 /* 394 * Skip if we have an AF_INET address. 395 */ 396 if (inet_pton(AF_INET, hosts[nhostsbak], 397 host_addr) == 1) { 398 close(fd); 399 continue; 400 } 401 } 402 if (setsockopt(fd, IPPROTO_IPV6, 403 IPV6_V6ONLY, &on, sizeof on) < 0) { 404 syslog(LOG_ERR, 405 "can't set v6-only binding for " 406 "ipv6 socket: %m"); 407 continue; 408 } 409 break; 410 default: 411 break; 412 } 413 414 /* 415 * If no hosts were specified, just bind to INADDR_ANY 416 */ 417 if (strcmp("*", hosts[nhostsbak]) == 0) 418 hosts[nhostsbak] = NULL; 419 if ((aicode = getaddrinfo(hosts[nhostsbak], servname, &hints, 420 &res)) != 0) { 421 syslog(LOG_ERR, "cannot get local address for %s: %s", 422 nconf->nc_netid, gai_strerror(aicode)); 423 continue; 424 } 425 addrlen = res->ai_addrlen; 426 sa = (struct sockaddr *)res->ai_addr; 427 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH); 428 if (bind(fd, sa, addrlen) != 0) { 429 syslog(LOG_ERR, "cannot bind %s on %s: %m", 430 (hosts[nhostsbak] == NULL) ? "*" : 431 hosts[nhostsbak], nconf->nc_netid); 432 if (res != NULL) 433 freeaddrinfo(res); 434 continue; 435 } else 436 bound = 1; 437 (void)umask(oldmask); 438 439 /* Copy the address */ 440 taddr.addr.len = taddr.addr.maxlen = addrlen; 441 taddr.addr.buf = malloc(addrlen); 442 if (taddr.addr.buf == NULL) { 443 syslog(LOG_ERR, 444 "cannot allocate memory for %s address", 445 nconf->nc_netid); 446 if (res != NULL) 447 freeaddrinfo(res); 448 return 1; 449 } 450 memcpy(taddr.addr.buf, sa, addrlen); 451 #ifdef ND_DEBUG 452 if (debugging) { 453 /* 454 * for debugging print out our universal 455 * address 456 */ 457 char *uaddr; 458 struct netbuf nb; 459 460 nb.buf = sa; 461 nb.len = nb.maxlen = sa->sa_len; 462 uaddr = taddr2uaddr(nconf, &nb); 463 (void)fprintf(stderr, 464 "rpcbind : my address is %s\n", uaddr); 465 (void)free(uaddr); 466 } 467 #endif 468 469 if (nconf->nc_semantics != NC_TPI_CLTS) 470 listen(fd, SOMAXCONN); 471 472 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 473 RPC_MAXDATASIZE, RPC_MAXDATASIZE); 474 if (my_xprt == (SVCXPRT *)NULL) { 475 syslog(LOG_ERR, "%s: could not create service", 476 nconf->nc_netid); 477 goto error; 478 } 479 } 480 if (!bound) 481 return 1; 482 } else { 483 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH); 484 if (bind(fd, sa, addrlen) < 0) { 485 syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid); 486 if (res != NULL) 487 freeaddrinfo(res); 488 return 1; 489 } 490 (void) umask(oldmask); 491 492 /* Copy the address */ 493 taddr.addr.len = taddr.addr.maxlen = addrlen; 494 taddr.addr.buf = malloc(addrlen); 495 if (taddr.addr.buf == NULL) { 496 syslog(LOG_ERR, "cannot allocate memory for %s address", 497 nconf->nc_netid); 498 if (res != NULL) 499 freeaddrinfo(res); 500 return 1; 501 } 502 memcpy(taddr.addr.buf, sa, addrlen); 503 #ifdef ND_DEBUG 504 if (debugging) { 505 /* for debugging print out our universal address */ 506 char *uaddr; 507 struct netbuf nb; 508 509 nb.buf = sa; 510 nb.len = nb.maxlen = sa->sa_len; 511 uaddr = taddr2uaddr(nconf, &nb); 512 (void) fprintf(stderr, "rpcbind : my address is %s\n", 513 uaddr); 514 (void) free(uaddr); 515 } 516 #endif 517 518 if (nconf->nc_semantics != NC_TPI_CLTS) 519 listen(fd, SOMAXCONN); 520 521 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 522 RPC_MAXDATASIZE, RPC_MAXDATASIZE); 523 if (my_xprt == (SVCXPRT *)NULL) { 524 syslog(LOG_ERR, "%s: could not create service", 525 nconf->nc_netid); 526 goto error; 527 } 528 } 529 530 #ifdef PORTMAP 531 /* 532 * Register both the versions for tcp/ip, udp/ip and local. 533 */ 534 if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 && 535 (strcmp(nconf->nc_proto, NC_TCP) == 0 || 536 strcmp(nconf->nc_proto, NC_UDP) == 0)) || 537 (strcmp(nconf->nc_netid, "unix") == 0) || 538 (strcmp(nconf->nc_netid, "local") == 0)) { 539 struct pmaplist *pml; 540 541 if (!svc_register(my_xprt, PMAPPROG, PMAPVERS, 542 pmap_service, 0)) { 543 syslog(LOG_ERR, "could not register on %s", 544 nconf->nc_netid); 545 goto error; 546 } 547 pml = malloc(sizeof (struct pmaplist)); 548 if (pml == NULL) { 549 syslog(LOG_ERR, "no memory!"); 550 exit(1); 551 } 552 pml->pml_map.pm_prog = PMAPPROG; 553 pml->pml_map.pm_vers = PMAPVERS; 554 pml->pml_map.pm_port = PMAPPORT; 555 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 556 if (tcptrans[0]) { 557 free(pml); 558 pml = NULL; 559 syslog(LOG_ERR, 560 "cannot have more than one TCP transport"); 561 goto error; 562 } 563 tcptrans = strdup(nconf->nc_netid); 564 pml->pml_map.pm_prot = IPPROTO_TCP; 565 566 /* Let's snarf the universal address */ 567 /* "h1.h2.h3.h4.p1.p2" */ 568 tcp_uaddr = taddr2uaddr(nconf, &taddr.addr); 569 } else if (strcmp(nconf->nc_proto, NC_UDP) == 0) { 570 if (udptrans[0]) { 571 syslog(LOG_ERR, 572 "cannot have more than one UDP transport"); 573 goto error; 574 } 575 udptrans = strdup(nconf->nc_netid); 576 pml->pml_map.pm_prot = IPPROTO_UDP; 577 578 /* Let's snarf the universal address */ 579 /* "h1.h2.h3.h4.p1.p2" */ 580 udp_uaddr = taddr2uaddr(nconf, &taddr.addr); 581 } else if (strcmp(nconf->nc_netid, "local") == 0) 582 pml->pml_map.pm_prot = IPPROTO_ST; 583 else if (strcmp(nconf->nc_netid, "unix") == 0) 584 pml->pml_map.pm_prot = IPPROTO_ST; 585 pml->pml_next = list_pml; 586 list_pml = pml; 587 588 /* Add version 3 information */ 589 pml = malloc(sizeof (struct pmaplist)); 590 if (pml == NULL) { 591 syslog(LOG_ERR, "no memory!"); 592 exit(1); 593 } 594 pml->pml_map = list_pml->pml_map; 595 pml->pml_map.pm_vers = RPCBVERS; 596 pml->pml_next = list_pml; 597 list_pml = pml; 598 599 /* Add version 4 information */ 600 pml = malloc (sizeof (struct pmaplist)); 601 if (pml == NULL) { 602 syslog(LOG_ERR, "no memory!"); 603 exit(1); 604 } 605 pml->pml_map = list_pml->pml_map; 606 pml->pml_map.pm_vers = RPCBVERS4; 607 pml->pml_next = list_pml; 608 list_pml = pml; 609 610 /* Also add version 2 stuff to rpcbind list */ 611 rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr); 612 } 613 #endif 614 615 /* version 3 registration */ 616 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) { 617 syslog(LOG_ERR, "could not register %s version 3", 618 nconf->nc_netid); 619 goto error; 620 } 621 rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr); 622 623 /* version 4 registration */ 624 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) { 625 syslog(LOG_ERR, "could not register %s version 4", 626 nconf->nc_netid); 627 goto error; 628 } 629 rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr); 630 631 /* decide if bound checking works for this transport */ 632 status = add_bndlist(nconf, &taddr.addr); 633 #ifdef BIND_DEBUG 634 if (debugging) { 635 if (status < 0) { 636 fprintf(stderr, "Error in finding bind status for %s\n", 637 nconf->nc_netid); 638 } else if (status == 0) { 639 fprintf(stderr, "check binding for %s\n", 640 nconf->nc_netid); 641 } else if (status > 0) { 642 fprintf(stderr, "No check binding for %s\n", 643 nconf->nc_netid); 644 } 645 } 646 #endif 647 /* 648 * rmtcall only supported on CLTS transports for now. 649 */ 650 if (nconf->nc_semantics == NC_TPI_CLTS) { 651 status = create_rmtcall_fd(nconf); 652 653 #ifdef BIND_DEBUG 654 if (debugging) { 655 if (status < 0) { 656 fprintf(stderr, 657 "Could not create rmtcall fd for %s\n", 658 nconf->nc_netid); 659 } else { 660 fprintf(stderr, "rmtcall fd for %s is %d\n", 661 nconf->nc_netid, status); 662 } 663 } 664 #endif 665 } 666 return (0); 667 error: 668 close(fd); 669 return (1); 670 } 671 672 /* 673 * Create the list of addresses that we're bound to. Normally, this 674 * list is empty because we're listening on the wildcard address 675 * (nhost == 0). If -h is specified on the command line, then 676 * bound_sa will have a list of the addresses that the program binds 677 * to specifically. This function takes that list and converts them to 678 * struct sockaddr * and stores them in bound_sa. 679 */ 680 static void 681 update_bound_sa(void) 682 { 683 struct addrinfo hints, *res = NULL; 684 int i; 685 686 if (nhosts == 0) 687 return; 688 bound_sa = malloc(sizeof(*bound_sa) * nhosts); 689 memset(&hints, 0, sizeof(hints)); 690 hints.ai_family = PF_UNSPEC; 691 for (i = 0; i < nhosts; i++) { 692 if (getaddrinfo(hosts[i], NULL, &hints, &res) != 0) 693 continue; 694 bound_sa[i] = malloc(res->ai_addrlen); 695 memcpy(bound_sa[i], res->ai_addr, res->ai_addrlen); 696 } 697 } 698 699 /* 700 * Match the sa against the list of addresses we've bound to. If 701 * we've not specifically bound to anything, we match everything. 702 * Otherwise, if the IPv4 or IPv6 address matches one of the addresses 703 * in bound_sa, we return true. If not, we return false. 704 */ 705 int 706 listen_addr(const struct sockaddr *sa) 707 { 708 int i; 709 710 /* 711 * If nhosts == 0, then there were no -h options on the 712 * command line, so all addresses are addresses we're 713 * listening to. 714 */ 715 if (nhosts == 0) 716 return 1; 717 for (i = 0; i < nhosts; i++) { 718 if (bound_sa[i] == NULL || 719 sa->sa_family != bound_sa[i]->sa_family) 720 continue; 721 switch (sa->sa_family) { 722 case AF_INET: 723 if (memcmp(&SA2SINADDR(sa), &SA2SINADDR(bound_sa[i]), 724 sizeof(struct in_addr)) == 0) 725 return (1); 726 break; 727 #ifdef INET6 728 case AF_INET6: 729 if (memcmp(&SA2SIN6ADDR(sa), &SA2SIN6ADDR(bound_sa[i]), 730 sizeof(struct in6_addr)) == 0) 731 return (1); 732 break; 733 #endif 734 default: 735 break; 736 } 737 } 738 return (0); 739 } 740 741 static void 742 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf, 743 struct netbuf *addr) 744 { 745 rpcblist_ptr rbl; 746 747 rbl = malloc(sizeof (rpcblist)); 748 if (rbl == NULL) { 749 syslog(LOG_ERR, "no memory!"); 750 exit(1); 751 } 752 753 rbl->rpcb_map.r_prog = prog; 754 rbl->rpcb_map.r_vers = vers; 755 rbl->rpcb_map.r_netid = strdup(nconf->nc_netid); 756 rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr); 757 rbl->rpcb_map.r_owner = strdup(superuser); 758 rbl->rpcb_next = list_rbl; /* Attach to global list */ 759 list_rbl = rbl; 760 } 761 762 /* 763 * Catch the signal and die 764 */ 765 static void 766 terminate(int signum) 767 { 768 char c = '\0'; 769 ssize_t wr; 770 771 doterminate = signum; 772 wr = write(terminate_wfd, &c, 1); 773 if (wr < 1) 774 _exit(2); 775 } 776 777 void 778 rpcbind_abort(void) 779 { 780 #ifdef WARMSTART 781 write_warmstart(); /* Dump yourself */ 782 #endif 783 abort(); 784 } 785 786 /* get command line options */ 787 static void 788 parseargs(int argc, char *argv[]) 789 { 790 int c; 791 792 #ifdef WARMSTART 793 #define WSOP "w" 794 #else 795 #define WSOP "" 796 #endif 797 #ifdef LIBWRAP 798 #define WRAPOP "W" 799 #else 800 #define WRAPOP "" 801 #endif 802 while ((c = getopt(argc, argv, "6adh:IiLlNs" WRAPOP WSOP)) != -1) { 803 switch (c) { 804 case '6': 805 ipv6_only = 1; 806 break; 807 case 'a': 808 doabort = 1; /* when debugging, do an abort on */ 809 break; /* errors; for rpcbind developers */ 810 /* only! */ 811 case 'd': 812 debugging = 1; 813 break; 814 case 'h': 815 ++nhosts; 816 hosts = realloc(hosts, nhosts * sizeof(char *)); 817 if (hosts == NULL) 818 errx(1, "Out of memory"); 819 hosts[nhosts - 1] = strdup(optarg); 820 if (hosts[nhosts - 1] == NULL) 821 errx(1, "Out of memory"); 822 break; 823 case 'I': 824 nobind_localhost = 1; 825 break; 826 case 'i': 827 insecure = 1; 828 break; 829 case 'L': 830 oldstyle_local = 1; 831 break; 832 case 'l': 833 verboselog = 1; 834 break; 835 case 'N': 836 nofork = 1; 837 break; 838 case 's': 839 runasdaemon = 1; 840 break; 841 #ifdef LIBWRAP 842 case 'W': 843 libwrap = 1; 844 break; 845 #endif 846 #ifdef WARMSTART 847 case 'w': 848 warmstart = 1; 849 break; 850 #endif 851 default: /* error */ 852 fprintf(stderr, 853 "usage: rpcbind [-6adIiLls%s%s] [-h bindip]\n", 854 WRAPOP, WSOP); 855 exit (1); 856 } 857 } 858 if (doabort && !debugging) { 859 fprintf(stderr, 860 "-a (abort) specified without -d (debugging) -- ignored.\n"); 861 doabort = 0; 862 } 863 #undef WSOP 864 } 865 866 void 867 reap(int dummy __unused) 868 { 869 int save_errno = errno; 870 871 while (wait3(NULL, WNOHANG, NULL) > 0) 872 ; 873 errno = save_errno; 874 } 875 876 void 877 toggle_verboselog(int dummy __unused) 878 { 879 verboselog = !verboselog; 880 } 881