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