usr.sbin/rpcbind/rpcbind.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  * @(#)rpcbind.c        1.19    94/04/25 SMI; 1.35 89/04/21 Copyr 1984 Sun Micro
  30  * $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl Exp $
  31  * $FreeBSD: src/usr.sbin/rpcbind/rpcbind.c,v 1.20 2008/02/14 20:12:23 yar Exp $
  32  * $DragonFly$
  33  */
  34 /*
  35  * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc.
  36  */
  37
  38 /*
  39  * rpcbind.c
  40  * Implements the program, version to address mapping for rpc.
  41  *
  42  */
  43
  44 #include <sys/types.h>
  45 #include <sys/stat.h>
  46 #include <sys/errno.h>
  47 #include <sys/time.h>
  48 #include <sys/resource.h>
  49 #include <sys/wait.h>
  50 #include <sys/signal.h>
  51 #include <sys/socket.h>
  52 #include <sys/un.h>
  53 #include <rpc/rpc.h>
  54 #include <rpc/rpc_com.h>
  55 #ifdef PORTMAP
  56 #include <netinet/in.h>
  57 #endif
  58 #include <arpa/inet.h>
  59 #include <fcntl.h>
  60 #include <netdb.h>
  61 #include <stdio.h>
  62 #include <netconfig.h>
  63 #include <stdlib.h>
  64 #include <unistd.h>
  65 #include <syslog.h>
  66 #include <err.h>
  67 #include <libutil.h>
  68 #include <pwd.h>
  69 #include <string.h>
  70 #include <errno.h>
  71 #include "rpcbind.h"
  72
  73 /* Global variables */
  74 int debugging = 0;      /* Tell me what's going on */
  75 int doabort = 0;        /* When debugging, do an abort on errors */
  76 rpcblist_ptr list_rbl;  /* A list of version 3/4 rpcbind services */
  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 int runasdaemon = 0;
  84 int insecure = 0;
  85 int oldstyle_local = 0;
  86 int verboselog = 0;
  87
  88 char **hosts = NULL;
  89 int ipv6_only = 0;
  90 int nhosts = 0;
  91 int on = 1;
  92 int rpcbindlockfd;
  93
  94 #ifdef WARMSTART
  95 /* Local Variable */
  96 static int warmstart = 0;       /* Grab an old copy of registrations. */
  97 #endif
  98
  99 #ifdef PORTMAP
 100 struct pmaplist *list_pml;      /* A list of version 2 rpcbind services */
 101 char *udptrans;         /* Name of UDP transport */
 102 char *tcptrans;         /* Name of TCP transport */
 103 char *udp_uaddr;        /* Universal UDP address */
 104 char *tcp_uaddr;        /* Universal TCP address */
 105 #endif
 106 static char servname[] = "rpcbind";
 107 static char superuser[] = "superuser";
 108
 109 static int      init_transport(struct netconfig *);
 110 static void     rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *,
 111                             struct netbuf *);
 112 static void     terminate(int);
 113 static void     parseargs(int, char *[]);
 114
 115 int
 116 main(int argc, char *argv[])
 117 {
 118         struct netconfig *nconf;
 119         void *nc_handle;        /* Net config handle */
 120         struct rlimit rl;
 121         int maxrec = RPC_MAXDATASIZE;
 122
 123         parseargs(argc, argv);
 124
 125         /* Check that another rpcbind isn't already running. */
 126         if ((rpcbindlockfd = (open(RPCBINDDLOCK,
 127             O_RDONLY|O_CREAT, 0444))) == -1)
 128                 err(1, "%s", RPCBINDDLOCK);
 129
 130         if(flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
 131                 errx(1, "another rpcbind is already running. Aborting");
 132
 133         getrlimit(RLIMIT_NOFILE, &rl);
 134         if (rl.rlim_cur < 128) {
 135                 if (rl.rlim_max <= 128)
 136                         rl.rlim_cur = rl.rlim_max;
 137                 else
 138                         rl.rlim_cur = 128;
 139                 setrlimit(RLIMIT_NOFILE, &rl);
 140         }
 141         openlog("rpcbind", LOG_CONS, LOG_DAEMON);
 142         if (geteuid()) { /* This command allowed only to root */
 143                 fprintf(stderr, "Sorry. You are not superuser\n");
 144                 exit(1);
 145         }
 146         nc_handle = setnetconfig();     /* open netconfig file */
 147         if (nc_handle == NULL) {
 148                 syslog(LOG_ERR, "could not read /etc/netconfig");
 149                 exit(1);
 150         }
 151 #ifdef PORTMAP
 152         udptrans = "";
 153         tcptrans = "";
 154 #endif
 155
 156         nconf = getnetconfigent("local");
 157         if (nconf == NULL)
 158                 nconf = getnetconfigent("unix");
 159         if (nconf == NULL) {
 160                 syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
 161                 exit(1);
 162         }
 163
 164         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 165
 166         init_transport(nconf);
 167
 168         while ((nconf = getnetconfig(nc_handle))) {
 169             if (nconf->nc_flag & NC_VISIBLE)
 170                 if (ipv6_only == 1 && strcmp(nconf->nc_protofmly,
 171                     "inet") == 0) {
 172                     /* DO NOTHING */
 173                 } else
 174                     init_transport(nconf);
 175         }
 176         endnetconfig(nc_handle);
 177
 178         /* catch the usual termination signals for graceful exit */
 179         signal(SIGCHLD, reap);
 180         signal(SIGINT, terminate);
 181         signal(SIGTERM, terminate);
 182         signal(SIGQUIT, terminate);
 183         /* ignore others that could get sent */
 184         signal(SIGPIPE, SIG_IGN);
 185         signal(SIGHUP, SIG_IGN);
 186         signal(SIGUSR1, SIG_IGN);
 187         signal(SIGUSR2, SIG_IGN);
 188 #ifdef WARMSTART
 189         if (warmstart) {
 190                 read_warmstart();
 191         }
 192 #endif
 193         if (debugging) {
 194                 printf("rpcbind debugging enabled.");
 195                 if (doabort) {
 196                         printf("  Will abort on errors!\n");
 197                 } else {
 198                         printf("\n");
 199                 }
 200         } else {
 201                 if (daemon(0, 0))
 202                         err(1, "fork failed");
 203         }
 204
 205         if (runasdaemon) {
 206                 struct passwd *p;
 207
 208                 if((p = getpwnam(RUN_AS)) == NULL) {
 209                         syslog(LOG_ERR, "cannot get uid of daemon: %m");
 210                         exit(1);
 211                 }
 212                 if (setuid(p->pw_uid) == -1) {
 213                         syslog(LOG_ERR, "setuid to daemon failed: %m");
 214                         exit(1);
 215                 }
 216         }
 217
 218         network_init();
 219
 220         my_svc_run();
 221         syslog(LOG_ERR, "svc_run returned unexpectedly");
 222         rpcbind_abort();
 223         /* NOTREACHED */
 224
 225         return 0;
 226 }
 227
 228 /*
 229  * Adds the entry into the rpcbind database.
 230  * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also
 231  * Returns 0 if succeeds, else fails
 232  */
 233 static int
 234 init_transport(struct netconfig *nconf)
 235 {
 236         int fd;
 237         struct t_bind taddr;
 238         struct addrinfo hints, *res = NULL;
 239         struct __rpc_sockinfo si;
 240         SVCXPRT *my_xprt;
 241         int status;     /* bound checking ? */
 242         int aicode;
 243         int addrlen;
 244         int nhostsbak;
 245         int bound;
 246         struct sockaddr *sa;
 247         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 248         struct sockaddr_un sun;
 249         mode_t oldmask;
 250
 251         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 252             (nconf->nc_semantics != NC_TPI_COTS) &&
 253             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 254             return (1); /* not my type */
 255 #ifdef ND_DEBUG
 256         if (debugging) {
 257             int i;
 258             char **s;
 259
 260             fprintf(stderr, "%s: %ld lookup routines :\n",
 261                 nconf->nc_netid, nconf->nc_nlookups);
 262             for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups;
 263                 i++, s++)
 264                 fprintf(stderr, "[%d] - %s\n", i, *s);
 265         }
 266 #endif
 267
 268         /*
 269          * XXX - using RPC library internal functions.
 270          */
 271         if ((strcmp(nconf->nc_netid, "local") == 0) ||
 272             (strcmp(nconf->nc_netid, "unix") == 0)) {
 273             /*
 274              * For other transports we call this later, for each socket we
 275              * like to bind.
 276              */
 277             if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 278                 int non_fatal = 0;
 279                 if (errno == EPROTONOSUPPORT)
 280                     non_fatal = 1;
 281                 syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s",
 282                     nconf->nc_netid);
 283                 return (1);
 284             }
 285         }
 286
 287         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 288             syslog(LOG_ERR, "cannot get information for %s",
 289                 nconf->nc_netid);
 290             return (1);
 291         }
 292
 293         if ((strcmp(nconf->nc_netid, "local") == 0) ||
 294             (strcmp(nconf->nc_netid, "unix") == 0)) {
 295             memset(&sun, 0, sizeof sun);
 296             sun.sun_family = AF_LOCAL;
 297             unlink(_PATH_RPCBINDSOCK);
 298             strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 299             sun.sun_len = SUN_LEN(&sun);
 300             addrlen = sizeof (struct sockaddr_un);
 301             sa = (struct sockaddr *)&sun;
 302         } else {
 303             /* Get rpcbind's address on this transport */
 304
 305             memset(&hints, 0, sizeof hints);
 306             hints.ai_flags = AI_PASSIVE;
 307             hints.ai_family = si.si_af;
 308             hints.ai_socktype = si.si_socktype;
 309             hints.ai_protocol = si.si_proto;
 310         }
 311
 312         if ((strcmp(nconf->nc_netid, "local") != 0) &&
 313             (strcmp(nconf->nc_netid, "unix") != 0)) {
 314             /*
 315              * If no hosts were specified, just bind to INADDR_ANY.
 316              * Otherwise  make sure 127.0.0.1 is added to the list.
 317              */
 318             nhostsbak = nhosts;
 319             nhostsbak++;
 320             hosts = realloc(hosts, nhostsbak * sizeof(char *));
 321             if (nhostsbak == 1)
 322                 hosts[0] = "*";
 323             else {
 324                 if (hints.ai_family == AF_INET) {
 325                     hosts[nhostsbak - 1] = "127.0.0.1";
 326                 } else if (hints.ai_family == AF_INET6) {
 327                     hosts[nhostsbak - 1] = "::1";
 328                 } else
 329                     return 1;
 330             }
 331
 332             /*
 333              * Bind to specific IPs if asked to
 334              */
 335             bound = 0;
 336             while (nhostsbak > 0) {
 337                 --nhostsbak;
 338                 /*
 339                  * XXX - using RPC library internal functions.
 340                  */
 341                 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 342                     int non_fatal = 0;
 343                     if (errno == EPROTONOSUPPORT &&
 344                         nconf->nc_semantics != NC_TPI_CLTS)
 345                         non_fatal = 1;
 346                     syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
 347                         "cannot create socket for %s", nconf->nc_netid);
 348                     return (1);
 349                 }
 350                 switch (hints.ai_family) {
 351                 case AF_INET:
 352                     if (inet_pton(AF_INET, hosts[nhostsbak],
 353                         host_addr) == 1) {
 354                         hints.ai_flags &= AI_NUMERICHOST;
 355                     } else {
 356                         /*
 357                          * Skip if we have an AF_INET6 address.
 358                          */
 359                         if (inet_pton(AF_INET6,
 360                             hosts[nhostsbak], host_addr) == 1) {
 361                             close(fd);
 362                             continue;
 363                         }
 364                     }
 365                     break;
 366                 case AF_INET6:
 367                     if (inet_pton(AF_INET6, hosts[nhostsbak],
 368                         host_addr) == 1) {
 369                         hints.ai_flags &= AI_NUMERICHOST;
 370                     } else {
 371                         /*
 372                          * Skip if we have an AF_INET address.
 373                          */
 374                         if (inet_pton(AF_INET, hosts[nhostsbak],
 375                             host_addr) == 1) {
 376                                 close(fd);
 377                                 continue;
 378                         }
 379                     }
 380                     if (setsockopt(fd, IPPROTO_IPV6,
 381                         IPV6_V6ONLY, &on, sizeof on) < 0) {
 382                         syslog(LOG_ERR,
 383                             "can't set v6-only binding for "
 384                             "ipv6 socket: %m");
 385                         continue;
 386                     }
 387                     break;
 388                 default:
 389                     break;
 390                 }
 391
 392                 /*
 393                  * If no hosts were specified, just bind to INADDR_ANY
 394                  */
 395                 if (strcmp("*", hosts[nhostsbak]) == 0)
 396                     hosts[nhostsbak] = NULL;
 397                 if ((strcmp(nconf->nc_netid, "local") != 0) &&
 398                     (strcmp(nconf->nc_netid, "unix") != 0)) {
 399                     if ((aicode = getaddrinfo(hosts[nhostsbak],
 400                         servname, &hints, &res)) != 0) {
 401                         syslog(LOG_ERR,
 402                             "cannot get local address for %s: %s",
 403                             nconf->nc_netid, gai_strerror(aicode));
 404                         continue;
 405                     }
 406                     addrlen = res->ai_addrlen;
 407                     sa = (struct sockaddr *)res->ai_addr;
 408                 }
 409                 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
 410                 if (bind(fd, sa, addrlen) != 0) {
 411                     syslog(LOG_ERR, "cannot bind %s on %s: %m",
 412                         (hosts[nhostsbak] == NULL) ? "*" :
 413                             hosts[nhostsbak], nconf->nc_netid);
 414                     if (res != NULL)
 415                         freeaddrinfo(res);
 416                     continue;
 417                 } else
 418                     bound = 1;
 419                 umask(oldmask);
 420
 421                 /* Copy the address */
 422                 taddr.addr.len = taddr.addr.maxlen = addrlen;
 423                 taddr.addr.buf = malloc(addrlen);
 424                 if (taddr.addr.buf == NULL) {
 425                     syslog(LOG_ERR,
 426                         "cannot allocate memory for %s address",
 427                         nconf->nc_netid);
 428                     if (res != NULL)
 429                         freeaddrinfo(res);
 430                     return 1;
 431                 }
 432                 memcpy(taddr.addr.buf, sa, addrlen);
 433 #ifdef ND_DEBUG
 434                 if (debugging) {
 435                     /*
 436                      * for debugging print out our universal
 437                      * address
 438                      */
 439                     char *uaddr;
 440                     struct netbuf nb;
 441
 442                     nb.buf = sa;
 443                     nb.len = nb.maxlen = sa->sa_len;
 444                     uaddr = taddr2uaddr(nconf, &nb);
 445                     fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
 446                     free(uaddr);
 447                 }
 448 #endif
 449
 450                 if (nconf->nc_semantics != NC_TPI_CLTS)
 451                     listen(fd, SOMAXCONN);
 452
 453                 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
 454                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 455                 if (my_xprt == (SVCXPRT *)NULL) {
 456                     syslog(LOG_ERR, "%s: could not create service",
 457                         nconf->nc_netid);
 458                     goto error;
 459                 }
 460             }
 461             if (!bound)
 462                 return 1;
 463         } else {
 464             oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
 465             if (bind(fd, sa, addrlen) < 0) {
 466                 syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
 467                 if (res != NULL)
 468                     freeaddrinfo(res);
 469                 return 1;
 470             }
 471             umask(oldmask);
 472
 473             /* Copy the address */
 474             taddr.addr.len = taddr.addr.maxlen = addrlen;
 475             taddr.addr.buf = malloc(addrlen);
 476             if (taddr.addr.buf == NULL) {
 477                 syslog(LOG_ERR, "cannot allocate memory for %s address",
 478                     nconf->nc_netid);
 479                 if (res != NULL)
 480                     freeaddrinfo(res);
 481                 return 1;
 482             }
 483             memcpy(taddr.addr.buf, sa, addrlen);
 484 #ifdef ND_DEBUG
 485             if (debugging) {
 486                 /* for debugging print out our universal address */
 487                 char *uaddr;
 488                 struct netbuf nb;
 489
 490                 nb.buf = sa;
 491                 nb.len = nb.maxlen = sa->sa_len;
 492                 uaddr = taddr2uaddr(nconf, &nb);
 493                 fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
 494                 free(uaddr);
 495             }
 496 #endif
 497
 498             if (nconf->nc_semantics != NC_TPI_CLTS)
 499                 listen(fd, SOMAXCONN);
 500
 501             my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
 502                 RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 503             if (my_xprt == (SVCXPRT *)NULL) {
 504                 syslog(LOG_ERR, "%s: could not create service",
 505                     nconf->nc_netid);
 506                 goto error;
 507             }
 508         }
 509
 510 #ifdef PORTMAP
 511         /*
 512          * Register both the versions for tcp/ip, udp/ip and local.
 513          */
 514         if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 &&
 515                 (strcmp(nconf->nc_proto, NC_TCP) == 0 ||
 516                 strcmp(nconf->nc_proto, NC_UDP) == 0)) ||
 517                 (strcmp(nconf->nc_netid, "unix") == 0) ||
 518                 (strcmp(nconf->nc_netid, "local") == 0)) {
 519                 struct pmaplist *pml;
 520
 521                 if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
 522                         pmap_service, 0)) {
 523                         syslog(LOG_ERR, "could not register on %s",
 524                                         nconf->nc_netid);
 525                         goto error;
 526                 }
 527                 pml = malloc(sizeof (struct pmaplist));
 528                 if (pml == NULL) {
 529                         syslog(LOG_ERR, "no memory!");
 530                         exit(1);
 531                 }
 532                 pml->pml_map.pm_prog = PMAPPROG;
 533                 pml->pml_map.pm_vers = PMAPVERS;
 534                 pml->pml_map.pm_port = PMAPPORT;
 535                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 536                         if (tcptrans[0]) {
 537                                 syslog(LOG_ERR,
 538                                 "cannot have more than one TCP transport");
 539                                 goto error;
 540                         }
 541                         tcptrans = strdup(nconf->nc_netid);
 542                         pml->pml_map.pm_prot = IPPROTO_TCP;
 543
 544                         /* Let's snarf the universal address */
 545                         /* "h1.h2.h3.h4.p1.p2" */
 546                         tcp_uaddr = taddr2uaddr(nconf, &taddr.addr);
 547                 } else if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
 548                         if (udptrans[0]) {
 549                                 syslog(LOG_ERR,
 550                                 "cannot have more than one UDP transport");
 551                                 goto error;
 552                         }
 553                         udptrans = strdup(nconf->nc_netid);
 554                         pml->pml_map.pm_prot = IPPROTO_UDP;
 555
 556                         /* Let's snarf the universal address */
 557                         /* "h1.h2.h3.h4.p1.p2" */
 558                         udp_uaddr = taddr2uaddr(nconf, &taddr.addr);
 559                 } else if (strcmp(nconf->nc_netid, "local") == 0)
 560                         pml->pml_map.pm_prot = IPPROTO_ST;
 561                 else if (strcmp(nconf->nc_netid, "unix") == 0)
 562                         pml->pml_map.pm_prot = IPPROTO_ST;
 563                 pml->pml_next = list_pml;
 564                 list_pml = pml;
 565
 566                 /* Add version 3 information */
 567                 pml = malloc(sizeof (struct pmaplist));
 568                 if (pml == NULL) {
 569                         syslog(LOG_ERR, "no memory!");
 570                         exit(1);
 571                 }
 572                 pml->pml_map = list_pml->pml_map;
 573                 pml->pml_map.pm_vers = RPCBVERS;
 574                 pml->pml_next = list_pml;
 575                 list_pml = pml;
 576
 577                 /* Add version 4 information */
 578                 pml = malloc (sizeof (struct pmaplist));
 579                 if (pml == NULL) {
 580                         syslog(LOG_ERR, "no memory!");
 581                         exit(1);
 582                 }
 583                 pml->pml_map = list_pml->pml_map;
 584                 pml->pml_map.pm_vers = RPCBVERS4;
 585                 pml->pml_next = list_pml;
 586                 list_pml = pml;
 587
 588                 /* Also add version 2 stuff to rpcbind list */
 589                 rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr);
 590         }
 591 #endif
 592
 593         /* version 3 registration */
 594         if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) {
 595                 syslog(LOG_ERR, "could not register %s version 3",
 596                                 nconf->nc_netid);
 597                 goto error;
 598         }
 599         rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr);
 600
 601         /* version 4 registration */
 602         if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) {
 603                 syslog(LOG_ERR, "could not register %s version 4",
 604                                 nconf->nc_netid);
 605                 goto error;
 606         }
 607         rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr);
 608
 609         /* decide if bound checking works for this transport */
 610         status = add_bndlist(nconf, &taddr.addr);
 611 #ifdef BIND_DEBUG
 612         if (debugging) {
 613                 if (status < 0) {
 614                         fprintf(stderr, "Error in finding bind status for %s\n",
 615                                 nconf->nc_netid);
 616                 } else if (status == 0) {
 617                         fprintf(stderr, "check binding for %s\n",
 618                                 nconf->nc_netid);
 619                 } else if (status > 0) {
 620                         fprintf(stderr, "No check binding for %s\n",
 621                                 nconf->nc_netid);
 622                 }
 623         }
 624 #endif
 625         /*
 626          * rmtcall only supported on CLTS transports for now.
 627          */
 628         if (nconf->nc_semantics == NC_TPI_CLTS) {
 629                 status = create_rmtcall_fd(nconf);
 630
 631 #ifdef BIND_DEBUG
 632                 if (debugging) {
 633                         if (status < 0) {
 634                                 fprintf(stderr,
 635                                     "Could not create rmtcall fd for %s\n",
 636                                         nconf->nc_netid);
 637                         } else {
 638                                 fprintf(stderr, "rmtcall fd for %s is %d\n",
 639                                         nconf->nc_netid, status);
 640                         }
 641                 }
 642 #endif
 643         }
 644         return (0);
 645 error:
 646         close(fd);
 647         return (1);
 648 }
 649
 650 static void
 651 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf,
 652             struct netbuf *addr)
 653 {
 654         rpcblist_ptr rbl;
 655
 656         rbl = malloc(sizeof (rpcblist));
 657         if (rbl == NULL) {
 658                 syslog(LOG_ERR, "no memory!");
 659                 exit(1);
 660         }
 661
 662         rbl->rpcb_map.r_prog = prog;
 663         rbl->rpcb_map.r_vers = vers;
 664         rbl->rpcb_map.r_netid = strdup(nconf->nc_netid);
 665         rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr);
 666         rbl->rpcb_map.r_owner = strdup(superuser);
 667         rbl->rpcb_next = list_rbl;      /* Attach to global list */
 668         list_rbl = rbl;
 669 }
 670
 671 /*
 672  * Catch the signal and die
 673  */
 674 static void
 675 terminate(int dummy __unused)
 676 {
 677         close(rpcbindlockfd);
 678 #ifdef WARMSTART
 679         syslog(LOG_ERR,
 680                 "rpcbind terminating on signal. Restart with \"rpcbind -w\"");
 681         write_warmstart();      /* Dump yourself */
 682 #endif
 683         exit(2);
 684 }
 685
 686 void
 687 rpcbind_abort(void)
 688 {
 689 #ifdef WARMSTART
 690         write_warmstart();      /* Dump yourself */
 691 #endif
 692         abort();
 693 }
 694
 695 /* get command line options */
 696 static void
 697 parseargs(int argc, char *argv[])
 698 {
 699         int c;
 700
 701 #ifdef WARMSTART
 702 #define WSOP    "w"
 703 #else
 704 #define WSOP    ""
 705 #endif
 706         while ((c = getopt(argc, argv, "6adh:iLls" WSOP)) != -1) {
 707                 switch (c) {
 708                 case '6':
 709                         ipv6_only = 1;
 710                         break;
 711                 case 'a':
 712                         doabort = 1;    /* when debugging, do an abort on */
 713                         break;          /* errors; for rpcbind developers */
 714                                         /* only! */
 715                 case 'd':
 716                         debugging = 1;
 717                         break;
 718                 case 'h':
 719                         ++nhosts;
 720                         hosts = realloc(hosts, nhosts * sizeof(char *));
 721                         if (hosts == NULL)
 722                                 errx(1, "Out of memory");
 723                         hosts[nhosts - 1] = strdup(optarg);
 724                         if (hosts[nhosts - 1] == NULL)
 725                                 errx(1, "Out of memory");
 726                         break;
 727                 case 'i':
 728                         insecure = 1;
 729                         break;
 730                 case 'L':
 731                         oldstyle_local = 1;
 732                         break;
 733                 case 'l':
 734                         verboselog = 1;
 735                         break;
 736                 case 's':
 737                         runasdaemon = 1;
 738                         break;
 739 #ifdef WARMSTART
 740                 case 'w':
 741                         warmstart = 1;
 742                         break;
 743 #endif
 744                 default:        /* error */
 745                         fprintf(stderr,
 746                             "usage: rpcbind [-6adiLls%s] [-h bindip]\n",
 747                             WSOP);
 748                         exit (1);
 749                 }
 750         }
 751         if (doabort && !debugging) {
 752             fprintf(stderr,
 753                 "-a (abort) specified without -d (debugging) -- ignored.\n");
 754             doabort = 0;
 755         }
 756 #undef WSOP
 757 }
 758
 759 void
 760 reap(int dummy __unused)
 761 {
 762         int save_errno = errno;
 763
 764         while (wait3(NULL, WNOHANG, NULL) > 0)
 765                 ;
 766         errno = save_errno;
 767 }
 768
 769 void
 770 toggle_verboselog(int dummy __unused)
 771 {
 772         verboselog = !verboselog;
 773 }