usr.sbin/rpc.lockd/lockd.c

   1 /*      $NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $        */
   2 /*      $FreeBSD$ */
   3
   4 /*
   5  * Copyright (c) 1995
   6  *      A.R. Gordon (andrew.gordon@net-tel.co.uk).  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed for the FreeBSD project
  19  * 4. Neither the name of the author nor the names of any co-contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  */
  36
  37 #include <sys/cdefs.h>
  38 #ifndef lint
  39 __RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
  40 #endif
  41
  42 /*
  43  * main() function for NFS lock daemon.  Most of the code in this
  44  * file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
  45  *
  46  * The actual program logic is in the file lock_proc.c
  47  */
  48
  49 #include <sys/param.h>
  50 #include <sys/linker.h>
  51 #include <sys/module.h>
  52 #include <sys/socket.h>
  53 #include <sys/stat.h>
  54
  55 #include <netinet/in.h>
  56 #include <arpa/inet.h>
  57
  58 #include <err.h>
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <errno.h>
  62 #include <syslog.h>
  63 #include <signal.h>
  64 #include <string.h>
  65 #include <unistd.h>
  66 #include <libutil.h>
  67 #include <netconfig.h>
  68 #include <netdb.h>
  69
  70 #include <rpc/rpc.h>
  71 #include <rpc/rpc_com.h>
  72 #include <rpcsvc/sm_inter.h>
  73
  74 #include "lockd.h"
  75 #include <rpcsvc/nlm_prot.h>
  76
  77 #define GETPORT_MAXTRY  20      /* Max tries to get a port # */
  78
  79 int             debug_level = 0;        /* 0 = no debugging syslog() calls */
  80 int             _rpcsvcdirty = 0;
  81
  82 int grace_expired;
  83 int nsm_state;
  84 int kernel_lockd;
  85 int kernel_lockd_client;
  86 pid_t client_pid;
  87 struct mon mon_host;
  88 char **hosts, *svcport_str = NULL;
  89 static int      mallocd_svcport = 0;
  90 static int      *sock_fd;
  91 static int      sock_fdcnt;
  92 static int      sock_fdpos;
  93 int nhosts = 0;
  94 int xcreated = 0;
  95 char **addrs;                   /* actually (netid, uaddr) pairs */
  96 int naddrs;                     /* count of how many (netid, uaddr) pairs */
  97 char localhost[] = "localhost";
  98
  99 static int      create_service(struct netconfig *nconf);
 100 static void     complete_service(struct netconfig *nconf, char *port_str);
 101 static void     clearout_service(void);
 102 void    lookup_addresses(struct netconfig *nconf);
 103 void    init_nsm(void);
 104 void    out_of_mem(void);
 105 void    usage(void);
 106
 107 void sigalarm_handler(void);
 108
 109 /*
 110  * XXX move to some header file.
 111  */
 112 #define _PATH_RPCLOCKDSOCK      "/var/run/rpclockd.sock"
 113
 114 int
 115 main(int argc, char **argv)
 116 {
 117         int ch, i, s;
 118         void *nc_handle;
 119         char *endptr, **hosts_bak;
 120         struct sigaction sigalarm;
 121         int grace_period = 30;
 122         struct netconfig *nconf;
 123         int have_v6 = 1;
 124         int maxrec = RPC_MAXDATASIZE;
 125         in_port_t svcport = 0;
 126         int attempt_cnt, port_len, port_pos, ret;
 127         char **port_list;
 128
 129         while ((ch = getopt(argc, argv, "d:g:h:p:")) != (-1)) {
 130                 switch (ch) {
 131                 case 'd':
 132                         debug_level = atoi(optarg);
 133                         if (!debug_level) {
 134                                 usage();
 135                                 /* NOTREACHED */
 136                         }
 137                         break;
 138                 case 'g':
 139                         grace_period = atoi(optarg);
 140                         if (!grace_period) {
 141                                 usage();
 142                                 /* NOTREACHED */
 143                         }
 144                         break;
 145                 case 'h':
 146                         ++nhosts;
 147                         hosts_bak = hosts;
 148                         hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 149                         if (hosts_bak == NULL) {
 150                                 if (hosts != NULL) {
 151                                         for (i = 0; i < nhosts; i++)
 152                                                 free(hosts[i]);
 153                                         free(hosts);
 154                                         out_of_mem();
 155                                 }
 156                         }
 157                         hosts = hosts_bak;
 158                         hosts[nhosts - 1] = strdup(optarg);
 159                         if (hosts[nhosts - 1] == NULL) {
 160                                 for (i = 0; i < (nhosts - 1); i++)
 161                                         free(hosts[i]);
 162                                 free(hosts);
 163                                 out_of_mem();
 164                         }
 165                         break;
 166                 case 'p':
 167                         endptr = NULL;
 168                         svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 169                         if (endptr == NULL || *endptr != '\0' ||
 170                             svcport == 0 || svcport >= IPPORT_MAX)
 171                                 usage();
 172                         svcport_str = strdup(optarg);
 173                         break;
 174                 default:
 175                 case '?':
 176                         usage();
 177                         /* NOTREACHED */
 178                 }
 179         }
 180         if (geteuid()) { /* This command allowed only to root */
 181                 fprintf(stderr, "Sorry. You are not superuser\n");
 182                 exit(1);
 183         }
 184
 185         kernel_lockd = FALSE;
 186         kernel_lockd_client = FALSE;
 187         if (modfind("nfslockd") < 0) {
 188                 if (kldload("nfslockd") < 0) {
 189                         fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
 190                 } else {
 191                         kernel_lockd = TRUE;
 192                 }
 193         } else {
 194                 kernel_lockd = TRUE;
 195         }
 196         if (kernel_lockd) {
 197                 if (getosreldate() >= 800040)
 198                         kernel_lockd_client = TRUE;
 199         }
 200
 201         (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
 202         (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
 203         (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
 204         (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
 205
 206         /*
 207          * Check if IPv6 support is present.
 208          */
 209         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 210         if (s < 0)
 211                 have_v6 = 0;
 212         else
 213                 close(s);
 214
 215         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 216
 217         /*
 218          * If no hosts were specified, add a wildcard entry to bind to
 219          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 220          * list.
 221          */
 222         if (nhosts == 0) {
 223                 hosts = malloc(sizeof(char *));
 224                 if (hosts == NULL)
 225                         out_of_mem();
 226
 227                 hosts[0] = strdup("*");
 228                 nhosts = 1;
 229         } else {
 230                 hosts_bak = hosts;
 231                 if (have_v6) {
 232                         hosts_bak = realloc(hosts, (nhosts + 2) *
 233                             sizeof(char *));
 234                         if (hosts_bak == NULL) {
 235                                 for (i = 0; i < nhosts; i++)
 236                                         free(hosts[i]);
 237                                 free(hosts);
 238                                 out_of_mem();
 239                         } else
 240                                 hosts = hosts_bak;
 241
 242                         nhosts += 2;
 243                         hosts[nhosts - 2] = strdup("::1");
 244                 } else {
 245                         hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 246                         if (hosts_bak == NULL) {
 247                                 for (i = 0; i < nhosts; i++)
 248                                         free(hosts[i]);
 249
 250                                 free(hosts);
 251                                 out_of_mem();
 252                         } else {
 253                                 nhosts += 1;
 254                                 hosts = hosts_bak;
 255                         }
 256                 }
 257                 hosts[nhosts - 1] = strdup("127.0.0.1");
 258         }
 259
 260         if (kernel_lockd) {
 261                 if (!kernel_lockd_client) {
 262                         /*
 263                          * For the case where we have a kernel lockd but it
 264                          * doesn't provide client locking, we run a cut-down
 265                          * RPC service on a local-domain socket. The kernel's
 266                          * RPC server will pass what it can't handle (mainly
 267                          * client replies) down to us.
 268                          */
 269                         struct sockaddr_un sun;
 270                         int fd, oldmask;
 271                         SVCXPRT *xprt;
 272
 273                         memset(&sun, 0, sizeof sun);
 274                         sun.sun_family = AF_LOCAL;
 275                         unlink(_PATH_RPCLOCKDSOCK);
 276                         strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
 277                         sun.sun_len = SUN_LEN(&sun);
 278                         fd = socket(AF_LOCAL, SOCK_STREAM, 0);
 279                         if (!fd) {
 280                                 err(1, "Can't create local lockd socket");
 281                         }
 282                         oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
 283                         if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
 284                                 err(1, "Can't bind local lockd socket");
 285                         }
 286                         umask(oldmask);
 287                         if (listen(fd, SOMAXCONN) < 0) {
 288                                 err(1, "Can't listen on local lockd socket");
 289                         }
 290                         xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 291                         if (!xprt) {
 292                                 err(1, "Can't create transport for local lockd socket");
 293                         }
 294                         if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
 295                                 err(1, "Can't register service for local lockd socket");
 296                         }
 297                 }
 298
 299                 /*
 300                  * We need to look up the addresses so that we can
 301                  * hand uaddrs (ascii encoded address+port strings) to
 302                  * the kernel.
 303                  */
 304                 nc_handle = setnetconfig();
 305                 while ((nconf = getnetconfig(nc_handle))) {
 306                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 307                         if (nconf->nc_flag & NC_VISIBLE) {
 308                                 /* Skip if there's no IPv6 support */
 309                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 310                                         /* DO NOTHING */
 311                                 } else {
 312                                         lookup_addresses(nconf);
 313                                 }
 314                         }
 315                 }
 316                 endnetconfig(nc_handle);
 317         } else {
 318                 attempt_cnt = 1;
 319                 sock_fdcnt = 0;
 320                 sock_fd = NULL;
 321                 port_list = NULL;
 322                 port_len = 0;
 323                 nc_handle = setnetconfig();
 324                 while ((nconf = getnetconfig(nc_handle))) {
 325                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 326                         if (nconf->nc_flag & NC_VISIBLE) {
 327                                 /* Skip if there's no IPv6 support */
 328                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 329                                         /* DO NOTHING */
 330                                 } else {
 331                                         ret = create_service(nconf);
 332                                         if (ret == 1)
 333                                                 /* Ignore this call */
 334                                                 continue;
 335                                         if (ret < 0) {
 336                                                 /*
 337                                                  * Failed to bind port, so close
 338                                                  * off all sockets created and
 339                                                  * try again if the port# was
 340                                                  * dynamically assigned via
 341                                                  * bind(2).
 342                                                  */
 343                                                 clearout_service();
 344                                                 if (mallocd_svcport != 0 &&
 345                                                     attempt_cnt <
 346                                                     GETPORT_MAXTRY) {
 347                                                         free(svcport_str);
 348                                                         svcport_str = NULL;
 349                                                         mallocd_svcport = 0;
 350                                                 } else {
 351                                                         errno = EADDRINUSE;
 352                                                         syslog(LOG_ERR,
 353                                                          "bindresvport_sa: %m");
 354                                                         exit(1);
 355                                                 }
 356
 357                                                 /*
 358                                                  * Start over at the first
 359                                                  * service.
 360                                                  */
 361                                                 free(sock_fd);
 362                                                 sock_fdcnt = 0;
 363                                                 sock_fd = NULL;
 364                                                 nc_handle = setnetconfig();
 365                                                 attempt_cnt++;
 366                                         } else if (mallocd_svcport != 0 &&
 367                                             attempt_cnt == GETPORT_MAXTRY) {
 368                                                 /*
 369                                                  * For the last attempt, allow
 370                                                  * different port #s for each
 371                                                  * nconf by saving the
 372                                                  * svcport_str and setting it
 373                                                  * back to NULL.
 374                                                  */
 375                                                 port_list = realloc(port_list,
 376                                                     (port_len + 1) *
 377                                                     sizeof(char *));
 378                                                 if (port_list == NULL)
 379                                                         out_of_mem();
 380                                                 port_list[port_len++] =
 381                                                     svcport_str;
 382                                                 svcport_str = NULL;
 383                                                 mallocd_svcport = 0;
 384                                         }
 385                                 }
 386                         }
 387                 }
 388
 389                 /*
 390                  * Successfully bound the ports, so call complete_service() to
 391                  * do the rest of the setup on the service(s).
 392                  */
 393                 sock_fdpos = 0;
 394                 port_pos = 0;
 395                 nc_handle = setnetconfig();
 396                 while ((nconf = getnetconfig(nc_handle))) {
 397                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 398                         if (nconf->nc_flag & NC_VISIBLE) {
 399                                 /* Skip if there's no IPv6 support */
 400                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 401                                         /* DO NOTHING */
 402                                 } else if (port_list != NULL) {
 403                                         if (port_pos >= port_len) {
 404                                                 syslog(LOG_ERR,
 405                                                     "too many port#s");
 406                                                 exit(1);
 407                                         }
 408                                         complete_service(nconf,
 409                                             port_list[port_pos++]);
 410                                 } else
 411                                         complete_service(nconf, svcport_str);
 412                         }
 413                 }
 414                 endnetconfig(nc_handle);
 415                 free(sock_fd);
 416                 if (port_list != NULL) {
 417                         for (port_pos = 0; port_pos < port_len; port_pos++)
 418                                 free(port_list[port_pos]);
 419                         free(port_list);
 420                 }
 421         }
 422
 423         /*
 424          * Note that it is NOT sensible to run this program from inetd - the
 425          * protocol assumes that it will run immediately at boot time.
 426          */
 427         if (daemon(0, debug_level > 0)) {
 428                 err(1, "cannot fork");
 429                 /* NOTREACHED */
 430         }
 431
 432         openlog("rpc.lockd", 0, LOG_DAEMON);
 433         if (debug_level)
 434                 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
 435         else
 436                 syslog(LOG_INFO, "Starting");
 437
 438         sigalarm.sa_handler = (sig_t) sigalarm_handler;
 439         sigemptyset(&sigalarm.sa_mask);
 440         sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
 441         sigalarm.sa_flags |= SA_RESTART;
 442         if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
 443                 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
 444                     strerror(errno));
 445                 exit(1);
 446         }
 447
 448         if (kernel_lockd) {
 449                 if (!kernel_lockd_client) {
 450                         init_nsm();
 451                         client_pid = client_request();
 452
 453                         /*
 454                          * Create a child process to enter the kernel and then
 455                          * wait for RPCs on our local domain socket.
 456                          */
 457                         if (!fork())
 458                                 nlm_syscall(debug_level, grace_period,
 459                                     naddrs, addrs);
 460                         else
 461                                 svc_run();
 462                 } else {
 463                         /*
 464                          * The kernel lockd implementation provides
 465                          * both client and server so we don't need to
 466                          * do anything else.
 467                          */
 468                         nlm_syscall(debug_level, grace_period, naddrs, addrs);
 469                 }
 470         } else {
 471                 grace_expired = 0;
 472                 alarm(grace_period);
 473
 474                 init_nsm();
 475
 476                 client_pid = client_request();
 477
 478                 svc_run();              /* Should never return */
 479         }
 480         exit(1);
 481 }
 482
 483 /*
 484  * This routine creates and binds sockets on the appropriate
 485  * addresses. It gets called one time for each transport.
 486  * It returns 0 upon success, 1 for ingore the call and -1 to indicate
 487  * bind failed with EADDRINUSE.
 488  * Any file descriptors that have been created are stored in sock_fd and
 489  * the total count of them is maintained in sock_fdcnt.
 490  */
 491 static int
 492 create_service(struct netconfig *nconf)
 493 {
 494         struct addrinfo hints, *res = NULL;
 495         struct sockaddr_in *sin;
 496         struct sockaddr_in6 *sin6;
 497         struct __rpc_sockinfo si;
 498         int aicode;
 499         int fd;
 500         int nhostsbak;
 501         int r;
 502         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 503         int mallocd_res;
 504
 505         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 506             (nconf->nc_semantics != NC_TPI_COTS) &&
 507             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 508                 return (1);     /* not my type */
 509
 510         /*
 511          * XXX - using RPC library internal functions.
 512          */
 513         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 514                 syslog(LOG_ERR, "cannot get information for %s",
 515                     nconf->nc_netid);
 516                 return (1);
 517         }
 518
 519         /* Get rpc.statd's address on this transport */
 520         memset(&hints, 0, sizeof hints);
 521         hints.ai_family = si.si_af;
 522         hints.ai_socktype = si.si_socktype;
 523         hints.ai_protocol = si.si_proto;
 524
 525         /*
 526          * Bind to specific IPs if asked to
 527          */
 528         nhostsbak = nhosts;
 529         while (nhostsbak > 0) {
 530                 --nhostsbak;
 531                 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
 532                 if (sock_fd == NULL)
 533                         out_of_mem();
 534                 sock_fd[sock_fdcnt++] = -1;     /* Set invalid for now. */
 535                 mallocd_res = 0;
 536                 hints.ai_flags = AI_PASSIVE;
 537
 538                 /*
 539                  * XXX - using RPC library internal functions.
 540                  */
 541                 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 542                         syslog(LOG_ERR, "cannot create socket for %s",
 543                             nconf->nc_netid);
 544                         continue;
 545                 }
 546
 547                 switch (hints.ai_family) {
 548                         case AF_INET:
 549                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 550                                     host_addr) == 1) {
 551                                         hints.ai_flags |= AI_NUMERICHOST;
 552                                 } else {
 553                                         /*
 554                                          * Skip if we have an AF_INET6 address.
 555                                          */
 556                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 557                                             host_addr) == 1) {
 558                                                 close(fd);
 559                                                 continue;
 560                                         }
 561                                 }
 562                                 break;
 563                         case AF_INET6:
 564                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 565                                     host_addr) == 1) {
 566                                         hints.ai_flags |= AI_NUMERICHOST;
 567                                 } else {
 568                                         /*
 569                                          * Skip if we have an AF_INET address.
 570                                          */
 571                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 572                                             host_addr) == 1) {
 573                                                 close(fd);
 574                                                 continue;
 575                                         }
 576                                 }
 577                                 break;
 578                         default:
 579                                 break;
 580                 }
 581
 582                 /*
 583                  * If no hosts were specified, just bind to INADDR_ANY
 584                  */
 585                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 586                         if (svcport_str == NULL) {
 587                                 res = malloc(sizeof(struct addrinfo));
 588                                 if (res == NULL)
 589                                         out_of_mem();
 590                                 mallocd_res = 1;
 591                                 res->ai_flags = hints.ai_flags;
 592                                 res->ai_family = hints.ai_family;
 593                                 res->ai_protocol = hints.ai_protocol;
 594                                 switch (res->ai_family) {
 595                                         case AF_INET:
 596                                                 sin = malloc(sizeof(struct sockaddr_in));
 597                                                 if (sin == NULL)
 598                                                         out_of_mem();
 599                                                 sin->sin_family = AF_INET;
 600                                                 sin->sin_port = htons(0);
 601                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 602                                                 res->ai_addr = (struct sockaddr*) sin;
 603                                                 res->ai_addrlen = (socklen_t)
 604                                                     sizeof(struct sockaddr_in);
 605                                                 break;
 606                                         case AF_INET6:
 607                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 608                                                 if (sin6 == NULL)
 609                                                         out_of_mem();
 610                                                 sin6->sin6_family = AF_INET6;
 611                                                 sin6->sin6_port = htons(0);
 612                                                 sin6->sin6_addr = in6addr_any;
 613                                                 res->ai_addr = (struct sockaddr*) sin6;
 614                                                 res->ai_addrlen = (socklen_t)
 615                                                     sizeof(struct sockaddr_in6);
 616                                                 break;
 617                                         default:
 618                                                 syslog(LOG_ERR,
 619                                                     "bad addr fam %d",
 620                                                     res->ai_family);
 621                                                 exit(1);
 622                                 }
 623                         } else {
 624                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 625                                     &hints, &res)) != 0) {
 626                                         syslog(LOG_ERR,
 627                                             "cannot get local address for %s: %s",
 628                                             nconf->nc_netid,
 629                                             gai_strerror(aicode));
 630                                         close(fd);
 631                                         continue;
 632                                 }
 633                         }
 634                 } else {
 635                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 636                             &hints, &res)) != 0) {
 637                                 syslog(LOG_ERR,
 638                                     "cannot get local address for %s: %s",
 639                                     nconf->nc_netid, gai_strerror(aicode));
 640                                 close(fd);
 641                                 continue;
 642                         }
 643                 }
 644
 645
 646                 /* Store the fd. */
 647                 sock_fd[sock_fdcnt - 1] = fd;
 648
 649                 /* Now, attempt the bind. */
 650                 r = bindresvport_sa(fd, res->ai_addr);
 651                 if (r != 0) {
 652                         if (errno == EADDRINUSE && mallocd_svcport != 0) {
 653                                 if (mallocd_res != 0) {
 654                                         free(res->ai_addr);
 655                                         free(res);
 656                                 } else
 657                                         freeaddrinfo(res);
 658                                 return (-1);
 659                         }
 660                         syslog(LOG_ERR, "bindresvport_sa: %m");
 661                         exit(1);
 662                 }
 663
 664                 if (svcport_str == NULL) {
 665                         svcport_str = malloc(NI_MAXSERV * sizeof(char));
 666                         if (svcport_str == NULL)
 667                                 out_of_mem();
 668                         mallocd_svcport = 1;
 669
 670                         if (getnameinfo(res->ai_addr,
 671                             res->ai_addr->sa_len, NULL, NI_MAXHOST,
 672                             svcport_str, NI_MAXSERV * sizeof(char),
 673                             NI_NUMERICHOST | NI_NUMERICSERV))
 674                                 errx(1, "Cannot get port number");
 675                 }
 676                 if (mallocd_res != 0) {
 677                         free(res->ai_addr);
 678                         free(res);
 679                 } else
 680                         freeaddrinfo(res);
 681                 res = NULL;
 682         }
 683         return (0);
 684 }
 685
 686 /*
 687  * Called after all the create_service() calls have succeeded, to complete
 688  * the setup and registration.
 689  */
 690 static void
 691 complete_service(struct netconfig *nconf, char *port_str)
 692 {
 693         struct addrinfo hints, *res = NULL;
 694         struct __rpc_sockinfo si;
 695         struct netbuf servaddr;
 696         SVCXPRT *transp = NULL;
 697         int aicode, fd, nhostsbak;
 698         int registered = 0;
 699
 700         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 701             (nconf->nc_semantics != NC_TPI_COTS) &&
 702             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 703                 return; /* not my type */
 704
 705         /*
 706          * XXX - using RPC library internal functions.
 707          */
 708         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 709                 syslog(LOG_ERR, "cannot get information for %s",
 710                     nconf->nc_netid);
 711                 return;
 712         }
 713
 714         nhostsbak = nhosts;
 715         while (nhostsbak > 0) {
 716                 --nhostsbak;
 717                 if (sock_fdpos >= sock_fdcnt) {
 718                         /* Should never happen. */
 719                         syslog(LOG_ERR, "Ran out of socket fd's");
 720                         return;
 721                 }
 722                 fd = sock_fd[sock_fdpos++];
 723                 if (fd < 0)
 724                         continue;
 725
 726                 if (nconf->nc_semantics != NC_TPI_CLTS)
 727                     listen(fd, SOMAXCONN);
 728
 729                 transp = svc_tli_create(fd, nconf, NULL,
 730                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 731
 732                 if (transp != (SVCXPRT *) NULL) {
 733                         if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
 734                             NULL))
 735                                 syslog(LOG_ERR,
 736                                     "can't register %s NLM_PROG, NLM_SM service",
 737                                     nconf->nc_netid);
 738
 739                         if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
 740                             NULL))
 741                                 syslog(LOG_ERR,
 742                                     "can't register %s NLM_PROG, NLM_VERS service",
 743                                     nconf->nc_netid);
 744
 745                         if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
 746                             NULL))
 747                                 syslog(LOG_ERR,
 748                                     "can't register %s NLM_PROG, NLM_VERSX service",
 749                                     nconf->nc_netid);
 750
 751                         if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
 752                             NULL))
 753                                 syslog(LOG_ERR,
 754                                     "can't register %s NLM_PROG, NLM_VERS4 service",
 755                                     nconf->nc_netid);
 756
 757                 } else
 758                         syslog(LOG_WARNING, "can't create %s services",
 759                             nconf->nc_netid);
 760
 761                 if (registered == 0) {
 762                         registered = 1;
 763                         memset(&hints, 0, sizeof hints);
 764                         hints.ai_flags = AI_PASSIVE;
 765                         hints.ai_family = si.si_af;
 766                         hints.ai_socktype = si.si_socktype;
 767                         hints.ai_protocol = si.si_proto;
 768
 769                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 770                             &res)) != 0) {
 771                                 syslog(LOG_ERR, "cannot get local address: %s",
 772                                     gai_strerror(aicode));
 773                                 exit(1);
 774                         }
 775
 776                         servaddr.buf = malloc(res->ai_addrlen);
 777                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 778                         servaddr.len = res->ai_addrlen;
 779
 780                         rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
 781                         rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
 782                         rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
 783                         rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
 784
 785                         xcreated++;
 786                         freeaddrinfo(res);
 787                 }
 788         } /* end while */
 789 }
 790
 791 /*
 792  * Clear out sockets after a failure to bind one of them, so that the
 793  * cycle of socket creation/binding can start anew.
 794  */
 795 static void
 796 clearout_service(void)
 797 {
 798         int i;
 799
 800         for (i = 0; i < sock_fdcnt; i++) {
 801                 if (sock_fd[i] >= 0) {
 802                         shutdown(sock_fd[i], SHUT_RDWR);
 803                         close(sock_fd[i]);
 804                 }
 805         }
 806 }
 807
 808 /*
 809  * Look up addresses for the kernel to create transports for.
 810  */
 811 void
 812 lookup_addresses(struct netconfig *nconf)
 813 {
 814         struct addrinfo hints, *res = NULL;
 815         struct sockaddr_in *sin;
 816         struct sockaddr_in6 *sin6;
 817         struct __rpc_sockinfo si;
 818         struct netbuf servaddr;
 819         int aicode;
 820         int nhostsbak;
 821         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 822         char *uaddr;
 823
 824         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 825             (nconf->nc_semantics != NC_TPI_COTS) &&
 826             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 827                 return; /* not my type */
 828
 829         /*
 830          * XXX - using RPC library internal functions.
 831          */
 832         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 833                 syslog(LOG_ERR, "cannot get information for %s",
 834                     nconf->nc_netid);
 835                 return;
 836         }
 837
 838         /* Get rpc.statd's address on this transport */
 839         memset(&hints, 0, sizeof hints);
 840         hints.ai_flags = AI_PASSIVE;
 841         hints.ai_family = si.si_af;
 842         hints.ai_socktype = si.si_socktype;
 843         hints.ai_protocol = si.si_proto;
 844
 845         /*
 846          * Bind to specific IPs if asked to
 847          */
 848         nhostsbak = nhosts;
 849         while (nhostsbak > 0) {
 850                 --nhostsbak;
 851
 852                 switch (hints.ai_family) {
 853                         case AF_INET:
 854                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 855                                     host_addr) == 1) {
 856                                         hints.ai_flags &= AI_NUMERICHOST;
 857                                 } else {
 858                                         /*
 859                                          * Skip if we have an AF_INET6 address.
 860                                          */
 861                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 862                                             host_addr) == 1) {
 863                                                 continue;
 864                                         }
 865                                 }
 866                                 break;
 867                         case AF_INET6:
 868                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 869                                     host_addr) == 1) {
 870                                         hints.ai_flags &= AI_NUMERICHOST;
 871                                 } else {
 872                                         /*
 873                                          * Skip if we have an AF_INET address.
 874                                          */
 875                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 876                                             host_addr) == 1) {
 877                                                 continue;
 878                                         }
 879                                 }
 880                                 break;
 881                         default:
 882                                 break;
 883                 }
 884
 885                 /*
 886                  * If no hosts were specified, just bind to INADDR_ANY
 887                  */
 888                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 889                         if (svcport_str == NULL) {
 890                                 res = malloc(sizeof(struct addrinfo));
 891                                 if (res == NULL)
 892                                         out_of_mem();
 893                                 res->ai_flags = hints.ai_flags;
 894                                 res->ai_family = hints.ai_family;
 895                                 res->ai_protocol = hints.ai_protocol;
 896                                 switch (res->ai_family) {
 897                                         case AF_INET:
 898                                                 sin = malloc(sizeof(struct sockaddr_in));
 899                                                 if (sin == NULL)
 900                                                         out_of_mem();
 901                                                 sin->sin_family = AF_INET;
 902                                                 sin->sin_port = htons(0);
 903                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 904                                                 res->ai_addr = (struct sockaddr*) sin;
 905                                                 res->ai_addrlen = (socklen_t)
 906                                                     sizeof(res->ai_addr);
 907                                                 break;
 908                                         case AF_INET6:
 909                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 910                                                 if (sin6 == NULL)
 911                                                         out_of_mem();
 912                                                 sin6->sin6_family = AF_INET6;
 913                                                 sin6->sin6_port = htons(0);
 914                                                 sin6->sin6_addr = in6addr_any;
 915                                                 res->ai_addr = (struct sockaddr*) sin6;
 916                                                 res->ai_addrlen = (socklen_t) sizeof(res->ai_addr);
 917                                                 break;
 918                                         default:
 919                                                 break;
 920                                 }
 921                         } else {
 922                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 923                                     &hints, &res)) != 0) {
 924                                         syslog(LOG_ERR,
 925                                             "cannot get local address for %s: %s",
 926                                             nconf->nc_netid,
 927                                             gai_strerror(aicode));
 928                                         continue;
 929                                 }
 930                         }
 931                 } else {
 932                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 933                             &hints, &res)) != 0) {
 934                                 syslog(LOG_ERR,
 935                                     "cannot get local address for %s: %s",
 936                                     nconf->nc_netid, gai_strerror(aicode));
 937                                 continue;
 938                         }
 939                 }
 940
 941                 servaddr.len = servaddr.maxlen = res->ai_addr->sa_len;
 942                 servaddr.buf = res->ai_addr;
 943                 uaddr = taddr2uaddr(nconf, &servaddr);
 944
 945                 addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
 946                 if (!addrs)
 947                         out_of_mem();
 948                 addrs[2 * naddrs] = strdup(nconf->nc_netid);
 949                 addrs[2 * naddrs + 1] = uaddr;
 950                 naddrs++;
 951         } /* end while */
 952 }
 953
 954 void
 955 sigalarm_handler(void)
 956 {
 957
 958         grace_expired = 1;
 959 }
 960
 961 void
 962 usage()
 963 {
 964         errx(1, "usage: rpc.lockd [-d <debuglevel>]"
 965             " [-g <grace period>] [-h <bindip>] [-p <port>]");
 966 }
 967
 968 /*
 969  * init_nsm --
 970  *      Reset the NSM state-of-the-world and acquire its state.
 971  */
 972 void
 973 init_nsm(void)
 974 {
 975         enum clnt_stat ret;
 976         my_id id;
 977         sm_stat stat;
 978         char name[] = "NFS NLM";
 979
 980         /*
 981          * !!!
 982          * The my_id structure isn't used by the SM_UNMON_ALL call, as far
 983          * as I know.  Leave it empty for now.
 984          */
 985         memset(&id, 0, sizeof(id));
 986         id.my_name = name;
 987
 988         /*
 989          * !!!
 990          * The statd program must already be registered when lockd runs.
 991          */
 992         do {
 993                 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
 994                     (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
 995                 if (ret == RPC_PROGUNAVAIL) {
 996                         syslog(LOG_WARNING, "%lu %s", SM_PROG,
 997                             clnt_sperrno(ret));
 998                         sleep(2);
 999                         continue;
1000                 }
1001                 break;
1002         } while (0);
1003
1004         if (ret != 0) {
1005                 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
1006                 exit(1);
1007         }
1008
1009         nsm_state = stat.state;
1010
1011         /* setup constant data for SM_MON calls */
1012         mon_host.mon_id.my_id.my_name = localhost;
1013         mon_host.mon_id.my_id.my_prog = NLM_PROG;
1014         mon_host.mon_id.my_id.my_vers = NLM_SM;
1015         mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY;  /* bsdi addition */
1016 }
1017
1018 /*
1019  * Out of memory, fatal
1020  */
1021 void out_of_mem()
1022 {
1023         syslog(LOG_ERR, "out of memory");
1024         exit(2);
1025 }