usr.sbin/rpcbind/rpcbind.c

   1 /*
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * @(#)rpcbind.c        1.19    94/04/25 SMI; 1.35 89/04/21 Copyr 1984 Sun Micro
  29  * $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl Exp $
  30  * $FreeBSD: src/usr.sbin/rpcbind/rpcbind.c,v 1.20 2008/02/14 20:12:23 yar Exp $
  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 <libutil.h>
  66 #include <pwd.h>
  67 #include <string.h>
  68 #include <errno.h>
  69 #include "rpcbind.h"
  70
  71 /* Global variables */
  72 int debugging = 0;      /* Tell me what's going on */
  73 int doabort = 0;        /* When debugging, do an abort on errors */
  74 rpcblist_ptr list_rbl;  /* A list of version 3/4 rpcbind services */
  75
  76 /* who to suid to if -s is given */
  77 #define RUN_AS  "daemon"
  78
  79 #define RPCBINDDLOCK "/var/run/rpcbind.lock"
  80
  81 int runasdaemon = 0;
  82 int insecure = 0;
  83 int oldstyle_local = 0;
  84 int verboselog = 0;
  85
  86 char **hosts = NULL;
  87 int ipv6_only = 0;
  88 int nhosts = 0;
  89 int on = 1;
  90 int rpcbindlockfd;
  91
  92 #ifdef WARMSTART
  93 /* Local Variable */
  94 static int warmstart = 0;       /* Grab an old copy of registrations. */
  95 #endif
  96
  97 #ifdef PORTMAP
  98 struct pmaplist *list_pml;      /* A list of version 2 rpcbind services */
  99 char *udptrans;         /* Name of UDP transport */
 100 char *tcptrans;         /* Name of TCP transport */
 101 char *udp_uaddr;        /* Universal UDP address */
 102 char *tcp_uaddr;        /* Universal TCP address */
 103 #endif
 104 static char servname[] = "rpcbind";
 105 static char superuser[] = "superuser";
 106
 107 static int      init_transport(struct netconfig *);
 108 static void     rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *,
 109                             struct netbuf *);
 110 static void     terminate(int);
 111 static void     parseargs(int, char *[]);
 112
 113 int
 114 main(int argc, char *argv[])
 115 {
 116         struct netconfig *nconf;
 117         void *nc_handle;        /* Net config handle */
 118         struct rlimit rl;
 119         int maxrec = RPC_MAXDATASIZE;
 120
 121         parseargs(argc, argv);
 122
 123         /* Check that another rpcbind isn't already running. */
 124         if ((rpcbindlockfd = (open(RPCBINDDLOCK,
 125             O_RDONLY|O_CREAT, 0444))) == -1)
 126                 err(1, "%s", RPCBINDDLOCK);
 127
 128         if(flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
 129                 errx(1, "another rpcbind is already running. Aborting");
 130
 131         getrlimit(RLIMIT_NOFILE, &rl);
 132         if (rl.rlim_cur < 128) {
 133                 if (rl.rlim_max <= 128)
 134                         rl.rlim_cur = rl.rlim_max;
 135                 else
 136                         rl.rlim_cur = 128;
 137                 setrlimit(RLIMIT_NOFILE, &rl);
 138         }
 139         openlog("rpcbind", LOG_CONS, LOG_DAEMON);
 140         if (geteuid()) { /* This command allowed only to root */
 141                 fprintf(stderr, "Sorry. You are not superuser\n");
 142                 exit(1);
 143         }
 144         nc_handle = setnetconfig();     /* open netconfig file */
 145         if (nc_handle == NULL) {
 146                 syslog(LOG_ERR, "could not read /etc/netconfig");
 147                 exit(1);
 148         }
 149 #ifdef PORTMAP
 150         udptrans = "";
 151         tcptrans = "";
 152 #endif
 153
 154         nconf = getnetconfigent("local");
 155         if (nconf == NULL)
 156                 nconf = getnetconfigent("unix");
 157         if (nconf == NULL) {
 158                 syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
 159                 exit(1);
 160         }
 161
 162         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 163
 164         init_transport(nconf);
 165
 166         while ((nconf = getnetconfig(nc_handle))) {
 167             if (nconf->nc_flag & NC_VISIBLE)
 168                 if (ipv6_only != 1 || strcmp(nconf->nc_protofmly, "inet") != 0)
 169                     init_transport(nconf);
 170         }
 171         endnetconfig(nc_handle);
 172
 173         /* catch the usual termination signals for graceful exit */
 174         signal(SIGCHLD, reap);
 175         signal(SIGINT, terminate);
 176         signal(SIGTERM, terminate);
 177         signal(SIGQUIT, terminate);
 178         /* ignore others that could get sent */
 179         signal(SIGPIPE, SIG_IGN);
 180         signal(SIGHUP, SIG_IGN);
 181         signal(SIGUSR1, SIG_IGN);
 182         signal(SIGUSR2, SIG_IGN);
 183 #ifdef WARMSTART
 184         if (warmstart) {
 185                 read_warmstart();
 186         }
 187 #endif
 188         if (debugging) {
 189                 printf("rpcbind debugging enabled.");
 190                 if (doabort) {
 191                         printf("  Will abort on errors!\n");
 192                 } else {
 193                         printf("\n");
 194                 }
 195         } else {
 196                 if (daemon(0, 0))
 197                         err(1, "fork failed");
 198         }
 199
 200         if (runasdaemon) {
 201                 struct passwd *p;
 202
 203                 if((p = getpwnam(RUN_AS)) == NULL) {
 204                         syslog(LOG_ERR, "cannot get uid of daemon: %m");
 205                         exit(1);
 206                 }
 207                 if (setuid(p->pw_uid) == -1) {
 208                         syslog(LOG_ERR, "setuid to daemon failed: %m");
 209                         exit(1);
 210                 }
 211         }
 212
 213         network_init();
 214
 215         my_svc_run();
 216         syslog(LOG_ERR, "svc_run returned unexpectedly");
 217         rpcbind_abort();
 218         /* NOTREACHED */
 219
 220         return 0;
 221 }
 222
 223 /*
 224  * Adds the entry into the rpcbind database.
 225  * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also
 226  * Returns 0 if succeeds, else fails
 227  */
 228 static int
 229 init_transport(struct netconfig *nconf)
 230 {
 231         int fd;
 232         struct t_bind taddr;
 233         struct addrinfo hints, *res = NULL;
 234         struct __rpc_sockinfo si;
 235         SVCXPRT *my_xprt;
 236         int status;     /* bound checking ? */
 237         int aicode;
 238         int addrlen;
 239         int nhostsbak;
 240         int bound;
 241         struct sockaddr *sa;
 242         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 243         struct sockaddr_un sun;
 244         mode_t oldmask;
 245
 246         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 247             (nconf->nc_semantics != NC_TPI_COTS) &&
 248             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 249             return (1); /* not my type */
 250 #ifdef ND_DEBUG
 251         if (debugging) {
 252             int i;
 253             char **s;
 254
 255             fprintf(stderr, "%s: %ld lookup routines :\n",
 256                 nconf->nc_netid, nconf->nc_nlookups);
 257             for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups;
 258                 i++, s++)
 259                 fprintf(stderr, "[%d] - %s\n", i, *s);
 260         }
 261 #endif
 262
 263         /*
 264          * XXX - using RPC library internal functions.
 265          */
 266         if ((strcmp(nconf->nc_netid, "local") == 0) ||
 267             (strcmp(nconf->nc_netid, "unix") == 0)) {
 268             /*
 269              * For other transports we call this later, for each socket we
 270              * like to bind.
 271              */
 272             if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 273                 int non_fatal = 0;
 274                 if (errno == EPROTONOSUPPORT)
 275                     non_fatal = 1;
 276                 syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s",
 277                     nconf->nc_netid);
 278                 return (1);
 279             }
 280         }
 281
 282         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 283             syslog(LOG_ERR, "cannot get information for %s",
 284                 nconf->nc_netid);
 285             return (1);
 286         }
 287
 288         if ((strcmp(nconf->nc_netid, "local") == 0) ||
 289             (strcmp(nconf->nc_netid, "unix") == 0)) {
 290             memset(&sun, 0, sizeof sun);
 291             sun.sun_family = AF_LOCAL;
 292             unlink(_PATH_RPCBINDSOCK);
 293             strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
 294             sun.sun_len = SUN_LEN(&sun);
 295             addrlen = sizeof (struct sockaddr_un);
 296             sa = (struct sockaddr *)&sun;
 297         } else {
 298             /* Get rpcbind's address on this transport */
 299
 300             memset(&hints, 0, sizeof hints);
 301             hints.ai_flags = AI_PASSIVE;
 302             hints.ai_family = si.si_af;
 303             hints.ai_socktype = si.si_socktype;
 304             hints.ai_protocol = si.si_proto;
 305         }
 306
 307         if ((strcmp(nconf->nc_netid, "local") != 0) &&
 308             (strcmp(nconf->nc_netid, "unix") != 0)) {
 309             /*
 310              * If no hosts were specified, just bind to INADDR_ANY.
 311              * Otherwise  make sure 127.0.0.1 is added to the list.
 312              */
 313             nhostsbak = nhosts;
 314             nhostsbak++;
 315             hosts = realloc(hosts, nhostsbak * sizeof(char *));
 316             if (nhostsbak == 1)
 317                 hosts[0] = "*";
 318             else {
 319                 if (hints.ai_family == AF_INET) {
 320                     hosts[nhostsbak - 1] = "127.0.0.1";
 321                 } else if (hints.ai_family == AF_INET6) {
 322                     hosts[nhostsbak - 1] = "::1";
 323                 } else
 324                     return 1;
 325             }
 326
 327             /*
 328              * Bind to specific IPs if asked to
 329              */
 330             bound = 0;
 331             while (nhostsbak > 0) {
 332                 --nhostsbak;
 333                 /*
 334                  * XXX - using RPC library internal functions.
 335                  */
 336                 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 337                     int non_fatal = 0;
 338                     if (errno == EPROTONOSUPPORT &&
 339                         nconf->nc_semantics != NC_TPI_CLTS)
 340                         non_fatal = 1;
 341                     syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
 342                         "cannot create socket for %s", nconf->nc_netid);
 343                     return (1);
 344                 }
 345                 switch (hints.ai_family) {
 346                 case AF_INET:
 347                     if (inet_pton(AF_INET, hosts[nhostsbak],
 348                         host_addr) == 1) {
 349                         hints.ai_flags &= AI_NUMERICHOST;
 350                     } else {
 351                         /*
 352                          * Skip if we have an AF_INET6 address.
 353                          */
 354                         if (inet_pton(AF_INET6,
 355                             hosts[nhostsbak], host_addr) == 1) {
 356                             close(fd);
 357                             continue;
 358                         }
 359                     }
 360                     break;
 361                 case AF_INET6:
 362                     if (inet_pton(AF_INET6, hosts[nhostsbak],
 363                         host_addr) == 1) {
 364                         hints.ai_flags &= AI_NUMERICHOST;
 365                     } else {
 366                         /*
 367                          * Skip if we have an AF_INET address.
 368                          */
 369                         if (inet_pton(AF_INET, hosts[nhostsbak],
 370                             host_addr) == 1) {
 371                                 close(fd);
 372                                 continue;
 373                         }
 374                     }
 375                     if (setsockopt(fd, IPPROTO_IPV6,
 376                         IPV6_V6ONLY, &on, sizeof on) < 0) {
 377                         syslog(LOG_ERR,
 378                             "can't set v6-only binding for "
 379                             "ipv6 socket: %m");
 380                         continue;
 381                     }
 382                     break;
 383                 default:
 384                     break;
 385                 }
 386
 387                 /*
 388                  * If no hosts were specified, just bind to INADDR_ANY
 389                  */
 390                 if (strcmp("*", hosts[nhostsbak]) == 0)
 391                     hosts[nhostsbak] = NULL;
 392                 if ((strcmp(nconf->nc_netid, "local") != 0) &&
 393                     (strcmp(nconf->nc_netid, "unix") != 0)) {
 394                     if ((aicode = getaddrinfo(hosts[nhostsbak],
 395                         servname, &hints, &res)) != 0) {
 396                         syslog(LOG_ERR,
 397                             "cannot get local address for %s: %s",
 398                             nconf->nc_netid, gai_strerror(aicode));
 399                         continue;
 400                     }
 401                     addrlen = res->ai_addrlen;
 402                     sa = (struct sockaddr *)res->ai_addr;
 403                 }
 404                 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
 405                 if (bind(fd, sa, addrlen) != 0) {
 406                     syslog(LOG_ERR, "cannot bind %s on %s: %m",
 407                         (hosts[nhostsbak] == NULL) ? "*" :
 408                             hosts[nhostsbak], nconf->nc_netid);
 409                     if (res != NULL)
 410                         freeaddrinfo(res);
 411                     continue;
 412                 } else
 413                     bound = 1;
 414                 umask(oldmask);
 415
 416                 /* Copy the address */
 417                 taddr.addr.len = taddr.addr.maxlen = addrlen;
 418                 taddr.addr.buf = malloc(addrlen);
 419                 if (taddr.addr.buf == NULL) {
 420                     syslog(LOG_ERR,
 421                         "cannot allocate memory for %s address",
 422                         nconf->nc_netid);
 423                     if (res != NULL)
 424                         freeaddrinfo(res);
 425                     return 1;
 426                 }
 427                 memcpy(taddr.addr.buf, sa, addrlen);
 428 #ifdef ND_DEBUG
 429                 if (debugging) {
 430                     /*
 431                      * for debugging print out our universal
 432                      * address
 433                      */
 434                     char *uaddr;
 435                     struct netbuf nb;
 436
 437                     nb.buf = sa;
 438                     nb.len = nb.maxlen = sa->sa_len;
 439                     uaddr = taddr2uaddr(nconf, &nb);
 440                     fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
 441                     free(uaddr);
 442                 }
 443 #endif
 444
 445                 if (nconf->nc_semantics != NC_TPI_CLTS)
 446                     listen(fd, SOMAXCONN);
 447
 448                 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
 449                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 450                 if (my_xprt == NULL) {
 451                     syslog(LOG_ERR, "%s: could not create service",
 452                         nconf->nc_netid);
 453                     goto error;
 454                 }
 455             }
 456             if (!bound)
 457                 return 1;
 458         } else {
 459             oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
 460             if (bind(fd, sa, addrlen) < 0) {
 461                 syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
 462                 if (res != NULL)
 463                     freeaddrinfo(res);
 464                 return 1;
 465             }
 466             umask(oldmask);
 467
 468             /* Copy the address */
 469             taddr.addr.len = taddr.addr.maxlen = addrlen;
 470             taddr.addr.buf = malloc(addrlen);
 471             if (taddr.addr.buf == NULL) {
 472                 syslog(LOG_ERR, "cannot allocate memory for %s address",
 473                     nconf->nc_netid);
 474                 if (res != NULL)
 475                     freeaddrinfo(res);
 476                 return 1;
 477             }
 478             memcpy(taddr.addr.buf, sa, addrlen);
 479 #ifdef ND_DEBUG
 480             if (debugging) {
 481                 /* for debugging print out our universal address */
 482                 char *uaddr;
 483                 struct netbuf nb;
 484
 485                 nb.buf = sa;
 486                 nb.len = nb.maxlen = sa->sa_len;
 487                 uaddr = taddr2uaddr(nconf, &nb);
 488                 fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
 489                 free(uaddr);
 490             }
 491 #endif
 492
 493             if (nconf->nc_semantics != NC_TPI_CLTS)
 494                 listen(fd, SOMAXCONN);
 495
 496             my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
 497                 RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 498             if (my_xprt == NULL) {
 499                 syslog(LOG_ERR, "%s: could not create service",
 500                     nconf->nc_netid);
 501                 goto error;
 502             }
 503         }
 504
 505 #ifdef PORTMAP
 506         /*
 507          * Register both the versions for tcp/ip, udp/ip and local.
 508          */
 509         if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 &&
 510                 (strcmp(nconf->nc_proto, NC_TCP) == 0 ||
 511                 strcmp(nconf->nc_proto, NC_UDP) == 0)) ||
 512                 (strcmp(nconf->nc_netid, "unix") == 0) ||
 513                 (strcmp(nconf->nc_netid, "local") == 0)) {
 514                 struct pmaplist *pml;
 515
 516                 if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
 517                         pmap_service, 0)) {
 518                         syslog(LOG_ERR, "could not register on %s",
 519                                         nconf->nc_netid);
 520                         goto error;
 521                 }
 522                 pml = malloc(sizeof (struct pmaplist));
 523                 if (pml == NULL) {
 524                         syslog(LOG_ERR, "no memory!");
 525                         exit(1);
 526                 }
 527                 pml->pml_map.pm_prog = PMAPPROG;
 528                 pml->pml_map.pm_vers = PMAPVERS;
 529                 pml->pml_map.pm_port = PMAPPORT;
 530                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 531                         if (tcptrans[0]) {
 532                                 syslog(LOG_ERR,
 533                                 "cannot have more than one TCP transport");
 534                                 goto error;
 535                         }
 536                         tcptrans = strdup(nconf->nc_netid);
 537                         pml->pml_map.pm_prot = IPPROTO_TCP;
 538
 539                         /* Let's snarf the universal address */
 540                         /* "h1.h2.h3.h4.p1.p2" */
 541                         tcp_uaddr = taddr2uaddr(nconf, &taddr.addr);
 542                 } else if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
 543                         if (udptrans[0]) {
 544                                 syslog(LOG_ERR,
 545                                 "cannot have more than one UDP transport");
 546                                 goto error;
 547                         }
 548                         udptrans = strdup(nconf->nc_netid);
 549                         pml->pml_map.pm_prot = IPPROTO_UDP;
 550
 551                         /* Let's snarf the universal address */
 552                         /* "h1.h2.h3.h4.p1.p2" */
 553                         udp_uaddr = taddr2uaddr(nconf, &taddr.addr);
 554                 } else if (strcmp(nconf->nc_netid, "local") == 0)
 555                         pml->pml_map.pm_prot = IPPROTO_ST;
 556                 else if (strcmp(nconf->nc_netid, "unix") == 0)
 557                         pml->pml_map.pm_prot = IPPROTO_ST;
 558                 pml->pml_next = list_pml;
 559                 list_pml = pml;
 560
 561                 /* Add version 3 information */
 562                 pml = malloc(sizeof (struct pmaplist));
 563                 if (pml == NULL) {
 564                         syslog(LOG_ERR, "no memory!");
 565                         exit(1);
 566                 }
 567                 pml->pml_map = list_pml->pml_map;
 568                 pml->pml_map.pm_vers = RPCBVERS;
 569                 pml->pml_next = list_pml;
 570                 list_pml = pml;
 571
 572                 /* Add version 4 information */
 573                 pml = malloc (sizeof (struct pmaplist));
 574                 if (pml == NULL) {
 575                         syslog(LOG_ERR, "no memory!");
 576                         exit(1);
 577                 }
 578                 pml->pml_map = list_pml->pml_map;
 579                 pml->pml_map.pm_vers = RPCBVERS4;
 580                 pml->pml_next = list_pml;
 581                 list_pml = pml;
 582
 583                 /* Also add version 2 stuff to rpcbind list */
 584                 rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr);
 585         }
 586 #endif
 587
 588         /* version 3 registration */
 589         if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) {
 590                 syslog(LOG_ERR, "could not register %s version 3",
 591                                 nconf->nc_netid);
 592                 goto error;
 593         }
 594         rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr);
 595
 596         /* version 4 registration */
 597         if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) {
 598                 syslog(LOG_ERR, "could not register %s version 4",
 599                                 nconf->nc_netid);
 600                 goto error;
 601         }
 602         rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr);
 603
 604         /* decide if bound checking works for this transport */
 605         status = add_bndlist(nconf, &taddr.addr);
 606 #ifdef BIND_DEBUG
 607         if (debugging) {
 608                 if (status < 0) {
 609                         fprintf(stderr, "Error in finding bind status for %s\n",
 610                                 nconf->nc_netid);
 611                 } else if (status == 0) {
 612                         fprintf(stderr, "check binding for %s\n",
 613                                 nconf->nc_netid);
 614                 } else if (status > 0) {
 615                         fprintf(stderr, "No check binding for %s\n",
 616                                 nconf->nc_netid);
 617                 }
 618         }
 619 #endif
 620         /*
 621          * rmtcall only supported on CLTS transports for now.
 622          */
 623         if (nconf->nc_semantics == NC_TPI_CLTS) {
 624                 status = create_rmtcall_fd(nconf);
 625
 626 #ifdef BIND_DEBUG
 627                 if (debugging) {
 628                         if (status < 0) {
 629                                 fprintf(stderr,
 630                                     "Could not create rmtcall fd for %s\n",
 631                                         nconf->nc_netid);
 632                         } else {
 633                                 fprintf(stderr, "rmtcall fd for %s is %d\n",
 634                                         nconf->nc_netid, status);
 635                         }
 636                 }
 637 #endif
 638         }
 639         return (0);
 640 error:
 641         close(fd);
 642         return (1);
 643 }
 644
 645 static void
 646 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf,
 647             struct netbuf *addr)
 648 {
 649         rpcblist_ptr rbl;
 650
 651         rbl = malloc(sizeof (rpcblist));
 652         if (rbl == NULL) {
 653                 syslog(LOG_ERR, "no memory!");
 654                 exit(1);
 655         }
 656
 657         rbl->rpcb_map.r_prog = prog;
 658         rbl->rpcb_map.r_vers = vers;
 659         rbl->rpcb_map.r_netid = strdup(nconf->nc_netid);
 660         rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr);
 661         rbl->rpcb_map.r_owner = strdup(superuser);
 662         rbl->rpcb_next = list_rbl;      /* Attach to global list */
 663         list_rbl = rbl;
 664 }
 665
 666 /*
 667  * Catch the signal and die
 668  */
 669 static void
 670 terminate(int dummy __unused)
 671 {
 672         close(rpcbindlockfd);
 673 #ifdef WARMSTART
 674         syslog(LOG_ERR,
 675                 "rpcbind terminating on signal. Restart with \"rpcbind -w\"");
 676         write_warmstart();      /* Dump yourself */
 677 #endif
 678         exit(2);
 679 }
 680
 681 void
 682 rpcbind_abort(void)
 683 {
 684 #ifdef WARMSTART
 685         write_warmstart();      /* Dump yourself */
 686 #endif
 687         abort();
 688 }
 689
 690 /* get command line options */
 691 static void
 692 parseargs(int argc, char *argv[])
 693 {
 694         int c;
 695
 696 #ifdef WARMSTART
 697 #define WSOP    "w"
 698 #else
 699 #define WSOP    ""
 700 #endif
 701         while ((c = getopt(argc, argv, "6adh:iLls" WSOP)) != -1) {
 702                 switch (c) {
 703                 case '6':
 704                         ipv6_only = 1;
 705                         break;
 706                 case 'a':
 707                         doabort = 1;    /* when debugging, do an abort on */
 708                         break;          /* errors; for rpcbind developers */
 709                                         /* only! */
 710                 case 'd':
 711                         debugging = 1;
 712                         break;
 713                 case 'h':
 714                         ++nhosts;
 715                         hosts = realloc(hosts, nhosts * sizeof(char *));
 716                         if (hosts == NULL)
 717                                 errx(1, "Out of memory");
 718                         hosts[nhosts - 1] = strdup(optarg);
 719                         if (hosts[nhosts - 1] == NULL)
 720                                 errx(1, "Out of memory");
 721                         break;
 722                 case 'i':
 723                         insecure = 1;
 724                         break;
 725                 case 'L':
 726                         oldstyle_local = 1;
 727                         break;
 728                 case 'l':
 729                         verboselog = 1;
 730                         break;
 731                 case 's':
 732                         runasdaemon = 1;
 733                         break;
 734 #ifdef WARMSTART
 735                 case 'w':
 736                         warmstart = 1;
 737                         break;
 738 #endif
 739                 default:        /* error */
 740                         fprintf(stderr,
 741                             "usage: rpcbind [-6adiLls%s] [-h bindip]\n",
 742                             WSOP);
 743                         exit (1);
 744                 }
 745         }
 746         if (doabort && !debugging) {
 747             fprintf(stderr,
 748                 "-a (abort) specified without -d (debugging) -- ignored.\n");
 749             doabort = 0;
 750         }
 751 #undef WSOP
 752 }
 753
 754 void
 755 reap(int dummy __unused)
 756 {
 757         int save_errno = errno;
 758
 759         while (wait3(NULL, WNOHANG, NULL) > 0)
 760                 ;
 761         errno = save_errno;
 762 }
 763
 764 void
 765 toggle_verboselog(int dummy __unused)
 766 {
 767         verboselog = !verboselog;
 768 }