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 static void     out_of_mem(void) __dead2;
 103 void    init_nsm(void);
 104 void    nlm_prog_0(struct svc_req *, SVCXPRT *);
 105 void    nlm_prog_1(struct svc_req *, SVCXPRT *);
 106 void    nlm_prog_3(struct svc_req *, SVCXPRT *);
 107 void    nlm_prog_4(struct svc_req *, SVCXPRT *);
 108 void    usage(void);
 109
 110 void sigalarm_handler(void);
 111
 112 /*
 113  * XXX move to some header file.
 114  */
 115 #define _PATH_RPCLOCKDSOCK      "/var/run/rpclockd.sock"
 116
 117 int
 118 main(int argc, char **argv)
 119 {
 120         int ch, i, s;
 121         void *nc_handle;
 122         char *endptr, **hosts_bak;
 123         struct sigaction sigalarm;
 124         int grace_period = 30;
 125         struct netconfig *nconf;
 126         int have_v6 = 1;
 127         int maxrec = RPC_MAXDATASIZE;
 128         in_port_t svcport = 0;
 129         int attempt_cnt, port_len, port_pos, ret;
 130         char **port_list;
 131
 132         while ((ch = getopt(argc, argv, "d:g:h:p:")) != (-1)) {
 133                 switch (ch) {
 134                 case 'd':
 135                         debug_level = atoi(optarg);
 136                         if (!debug_level) {
 137                                 usage();
 138                                 /* NOTREACHED */
 139                         }
 140                         break;
 141                 case 'g':
 142                         grace_period = atoi(optarg);
 143                         if (!grace_period) {
 144                                 usage();
 145                                 /* NOTREACHED */
 146                         }
 147                         break;
 148                 case 'h':
 149                         ++nhosts;
 150                         hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 151                         if (hosts_bak == NULL) {
 152                                 if (hosts != NULL) {
 153                                         for (i = 0; i < nhosts; i++)
 154                                                 free(hosts[i]);
 155                                         free(hosts);
 156                                         out_of_mem();
 157                                 }
 158                         }
 159                         hosts = hosts_bak;
 160                         hosts[nhosts - 1] = strdup(optarg);
 161                         if (hosts[nhosts - 1] == NULL) {
 162                                 for (i = 0; i < (nhosts - 1); i++)
 163                                         free(hosts[i]);
 164                                 free(hosts);
 165                                 out_of_mem();
 166                         }
 167                         break;
 168                 case 'p':
 169                         endptr = NULL;
 170                         svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 171                         if (endptr == NULL || *endptr != '\0' ||
 172                             svcport == 0 || svcport >= IPPORT_MAX)
 173                                 usage();
 174                         svcport_str = strdup(optarg);
 175                         break;
 176                 default:
 177                         usage();
 178                         /* NOTREACHED */
 179                 }
 180         }
 181         if (geteuid()) { /* This command allowed only to root */
 182                 fprintf(stderr, "Sorry. You are not superuser\n");
 183                 exit(1);
 184         }
 185
 186         kernel_lockd = FALSE;
 187         kernel_lockd_client = FALSE;
 188         if (modfind("nfslockd") < 0) {
 189                 if (kldload("nfslockd") < 0) {
 190                         fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
 191                 } else {
 192                         kernel_lockd = TRUE;
 193                 }
 194         } else {
 195                 kernel_lockd = TRUE;
 196         }
 197         if (kernel_lockd) {
 198                 if (getosreldate() >= 800040)
 199                         kernel_lockd_client = TRUE;
 200         }
 201
 202         (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
 203         (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
 204         (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
 205         (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
 206
 207         /*
 208          * Check if IPv6 support is present.
 209          */
 210         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 211         if (s < 0)
 212                 have_v6 = 0;
 213         else
 214                 close(s);
 215
 216         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 217
 218         /*
 219          * If no hosts were specified, add a wildcard entry to bind to
 220          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 221          * list.
 222          */
 223         if (nhosts == 0) {
 224                 hosts = malloc(sizeof(char**));
 225                 if (hosts == NULL)
 226                         out_of_mem();
 227
 228                 hosts[0] = "*";
 229                 nhosts = 1;
 230         } else {
 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] = "::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] = "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                                         create_service(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 if lockd for user NLM, or perform a lookup of
 486  * addresses for the kernel to create transports.
 487  *
 488  * It gets called one time for each transport.
 489  *
 490  * It returns 0 upon success, 1 for ingore the call and -1 to indicate
 491  * bind failed with EADDRINUSE.
 492  *
 493  * Any file descriptors that have been created are stored in sock_fd and
 494  * the total count of them is maintained in sock_fdcnt.
 495  */
 496 static int
 497 create_service(struct netconfig *nconf)
 498 {
 499         struct addrinfo hints, *res = NULL;
 500         struct sockaddr_in *sin;
 501         struct sockaddr_in6 *sin6;
 502         struct __rpc_sockinfo si;
 503         int aicode;
 504         int fd;
 505         int nhostsbak;
 506         int r;
 507         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 508         int mallocd_res;
 509
 510         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 511             (nconf->nc_semantics != NC_TPI_COTS) &&
 512             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 513                 return (1);     /* not my type */
 514
 515         /*
 516          * XXX - using RPC library internal functions.
 517          */
 518         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 519                 syslog(LOG_ERR, "cannot get information for %s",
 520                     nconf->nc_netid);
 521                 return (1);
 522         }
 523
 524         /* Get rpc.statd's address on this transport */
 525         memset(&hints, 0, sizeof hints);
 526         hints.ai_family = si.si_af;
 527         hints.ai_socktype = si.si_socktype;
 528         hints.ai_protocol = si.si_proto;
 529
 530         /*
 531          * Bind to specific IPs if asked to
 532          */
 533         nhostsbak = nhosts;
 534         while (nhostsbak > 0) {
 535                 --nhostsbak;
 536                 mallocd_res = 0;
 537                 hints.ai_flags = AI_PASSIVE;
 538
 539                 if (!kernel_lockd) {
 540                         sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
 541                         if (sock_fd == NULL)
 542                                 out_of_mem();
 543                         sock_fd[sock_fdcnt++] = -1;     /* Set invalid for now. */
 544
 545                         /*
 546                         * XXX - using RPC library internal functions.
 547                         */
 548                         if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 549                                 syslog(LOG_ERR, "cannot create socket for %s",
 550                                         nconf->nc_netid);
 551                                 continue;
 552                         }
 553                 }
 554
 555                 switch (hints.ai_family) {
 556                         case AF_INET:
 557                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 558                                     host_addr) == 1) {
 559                                         hints.ai_flags |= AI_NUMERICHOST;
 560                                 } else {
 561                                         /*
 562                                          * Skip if we have an AF_INET6 address.
 563                                          */
 564                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 565                                             host_addr) == 1) {
 566                                                 if (!kernel_lockd)
 567                                                         close(fd);
 568                                                 continue;
 569                                         }
 570                                 }
 571                                 break;
 572                         case AF_INET6:
 573                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 574                                     host_addr) == 1) {
 575                                         hints.ai_flags |= AI_NUMERICHOST;
 576                                 } else {
 577                                         /*
 578                                          * Skip if we have an AF_INET address.
 579                                          */
 580                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 581                                             host_addr) == 1) {
 582                                                 if (!kernel_lockd)
 583                                                         close(fd);
 584                                                 continue;
 585                                         }
 586                                 }
 587                                 break;
 588                         default:
 589                                 break;
 590                 }
 591
 592                 /*
 593                  * If no hosts were specified, just bind to INADDR_ANY
 594                  */
 595                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 596                         if (svcport_str == NULL) {
 597                                 if ((res = malloc(sizeof(struct addrinfo))) == NULL)
 598                                         out_of_mem();
 599                                 mallocd_res = 1;
 600                                 res->ai_flags = hints.ai_flags;
 601                                 res->ai_family = hints.ai_family;
 602                                 res->ai_protocol = hints.ai_protocol;
 603                                 switch (res->ai_family) {
 604                                         case AF_INET:
 605                                                 sin = malloc(sizeof(struct sockaddr_in));
 606                                                 if (sin == NULL)
 607                                                         out_of_mem();
 608                                                 sin->sin_family = AF_INET;
 609                                                 sin->sin_port = htons(0);
 610                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 611                                                 res->ai_addr = (struct sockaddr*) sin;
 612                                                 res->ai_addrlen = (socklen_t)
 613                                                     sizeof(struct sockaddr_in);
 614                                                 break;
 615                                         case AF_INET6:
 616                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 617                                                 if (sin6 == NULL)
 618                                                         out_of_mem();
 619                                                 sin6->sin6_family = AF_INET6;
 620                                                 sin6->sin6_port = htons(0);
 621                                                 sin6->sin6_addr = in6addr_any;
 622                                                 res->ai_addr = (struct sockaddr*) sin6;
 623                                                 res->ai_addrlen = (socklen_t)
 624                                                     sizeof(struct sockaddr_in6);
 625                                                 break;
 626                                         default:
 627                                                 syslog(LOG_ERR,
 628                                                     "bad address family %d",
 629                                                     res->ai_family);
 630                                                 exit(1);
 631                                 }
 632                         } else {
 633                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 634                                     &hints, &res)) != 0) {
 635                                         syslog(LOG_ERR,
 636                                             "cannot get local address for %s: %s",
 637                                             nconf->nc_netid,
 638                                             gai_strerror(aicode));
 639                                         if (!kernel_lockd)
 640                                                 close(fd);
 641                                         continue;
 642                                 }
 643                         }
 644                 } else {
 645                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 646                             &hints, &res)) != 0) {
 647                                 syslog(LOG_ERR,
 648                                     "cannot get local address for %s: %s",
 649                                     nconf->nc_netid, gai_strerror(aicode));
 650                                 if (!kernel_lockd)
 651                                         close(fd);
 652                                 continue;
 653                         }
 654                 }
 655
 656                 if (kernel_lockd) {
 657                         struct netbuf servaddr;
 658                         char *uaddr;
 659
 660                         /*
 661                          * Look up addresses for the kernel to create transports for.
 662                          */
 663                         servaddr.len = servaddr.maxlen = res->ai_addrlen;
 664                         servaddr.buf = res->ai_addr;
 665                         uaddr = taddr2uaddr(nconf, &servaddr);
 666
 667                         addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
 668                         if (!addrs)
 669                                 out_of_mem();
 670                         addrs[2 * naddrs] = strdup(nconf->nc_netid);
 671                         addrs[2 * naddrs + 1] = uaddr;
 672                         naddrs++;
 673                 } else {
 674                         /* Store the fd. */
 675                         sock_fd[sock_fdcnt - 1] = fd;
 676
 677                         /* Now, attempt the bind. */
 678                         r = bindresvport_sa(fd, res->ai_addr);
 679                         if (r != 0) {
 680                                 if (errno == EADDRINUSE && mallocd_svcport != 0) {
 681                                         if (mallocd_res != 0) {
 682                                                 free(res->ai_addr);
 683                                                 free(res);
 684                                         } else
 685                                                 freeaddrinfo(res);
 686                                         return (-1);
 687                                 }
 688                                 syslog(LOG_ERR, "bindresvport_sa: %m");
 689                                 exit(1);
 690                         }
 691
 692                         if (svcport_str == NULL) {
 693                                 svcport_str = malloc(NI_MAXSERV * sizeof(char));
 694                                 if (svcport_str == NULL)
 695                                         out_of_mem();
 696                                 mallocd_svcport = 1;
 697
 698                                 if (getnameinfo(res->ai_addr,
 699                                 res->ai_addr->sa_len, NULL, NI_MAXHOST,
 700                                 svcport_str, NI_MAXSERV * sizeof(char),
 701                                 NI_NUMERICHOST | NI_NUMERICSERV))
 702                                         errx(1, "Cannot get port number");
 703                         }
 704                 }
 705
 706                 if (mallocd_res != 0) {
 707                         free(res->ai_addr);
 708                         free(res);
 709                 } else
 710                         freeaddrinfo(res);
 711                 res = NULL;
 712         }
 713         return (0);
 714 }
 715
 716 /*
 717  * Called after all the create_service() calls have succeeded, to complete
 718  * the setup and registration.
 719  */
 720 static void
 721 complete_service(struct netconfig *nconf, char *port_str)
 722 {
 723         struct addrinfo hints, *res = NULL;
 724         struct __rpc_sockinfo si;
 725         struct netbuf servaddr;
 726         SVCXPRT *transp = NULL;
 727         int aicode, fd, nhostsbak;
 728         int registered = 0;
 729
 730         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 731             (nconf->nc_semantics != NC_TPI_COTS) &&
 732             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 733                 return; /* not my type */
 734
 735         /*
 736          * XXX - using RPC library internal functions.
 737          */
 738         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 739                 syslog(LOG_ERR, "cannot get information for %s",
 740                     nconf->nc_netid);
 741                 return;
 742         }
 743
 744         nhostsbak = nhosts;
 745         while (nhostsbak > 0) {
 746                 --nhostsbak;
 747                 if (sock_fdpos >= sock_fdcnt) {
 748                         /* Should never happen. */
 749                         syslog(LOG_ERR, "Ran out of socket fd's");
 750                         return;
 751                 }
 752                 fd = sock_fd[sock_fdpos++];
 753                 if (fd < 0)
 754                         continue;
 755
 756                 if (nconf->nc_semantics != NC_TPI_CLTS)
 757                     listen(fd, SOMAXCONN);
 758
 759                 transp = svc_tli_create(fd, nconf, NULL,
 760                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 761
 762                 if (transp != (SVCXPRT *) NULL) {
 763                         if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
 764                             NULL))
 765                                 syslog(LOG_ERR,
 766                                     "can't register %s NLM_PROG, NLM_SM service",
 767                                     nconf->nc_netid);
 768
 769                         if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
 770                             NULL))
 771                                 syslog(LOG_ERR,
 772                                     "can't register %s NLM_PROG, NLM_VERS service",
 773                                     nconf->nc_netid);
 774
 775                         if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
 776                             NULL))
 777                                 syslog(LOG_ERR,
 778                                     "can't register %s NLM_PROG, NLM_VERSX service",
 779                                     nconf->nc_netid);
 780
 781                         if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
 782                             NULL))
 783                                 syslog(LOG_ERR,
 784                                     "can't register %s NLM_PROG, NLM_VERS4 service",
 785                                     nconf->nc_netid);
 786
 787                 } else
 788                         syslog(LOG_WARNING, "can't create %s services",
 789                             nconf->nc_netid);
 790
 791                 if (registered == 0) {
 792                         registered = 1;
 793                         memset(&hints, 0, sizeof hints);
 794                         hints.ai_flags = AI_PASSIVE;
 795                         hints.ai_family = si.si_af;
 796                         hints.ai_socktype = si.si_socktype;
 797                         hints.ai_protocol = si.si_proto;
 798
 799                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 800                             &res)) != 0) {
 801                                 syslog(LOG_ERR, "cannot get local address: %s",
 802                                     gai_strerror(aicode));
 803                                 exit(1);
 804                         }
 805
 806                         servaddr.buf = malloc(res->ai_addrlen);
 807                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 808                         servaddr.len = res->ai_addrlen;
 809
 810                         rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
 811                         rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
 812                         rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
 813                         rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
 814
 815                         xcreated++;
 816                         freeaddrinfo(res);
 817                 }
 818         } /* end while */
 819 }
 820
 821 /*
 822  * Clear out sockets after a failure to bind one of them, so that the
 823  * cycle of socket creation/binding can start anew.
 824  */
 825 static void
 826 clearout_service(void)
 827 {
 828         int i;
 829
 830         for (i = 0; i < sock_fdcnt; i++) {
 831                 if (sock_fd[i] >= 0) {
 832                         shutdown(sock_fd[i], SHUT_RDWR);
 833                         close(sock_fd[i]);
 834                 }
 835         }
 836 }
 837
 838 void
 839 sigalarm_handler(void)
 840 {
 841
 842         grace_expired = 1;
 843 }
 844
 845 void
 846 usage()
 847 {
 848         errx(1, "usage: rpc.lockd [-d <debuglevel>]"
 849             " [-g <grace period>] [-h <bindip>] [-p <port>]");
 850 }
 851
 852 /*
 853  * init_nsm --
 854  *      Reset the NSM state-of-the-world and acquire its state.
 855  */
 856 void
 857 init_nsm(void)
 858 {
 859         enum clnt_stat ret;
 860         my_id id;
 861         sm_stat stat;
 862         char name[] = "NFS NLM";
 863
 864         /*
 865          * !!!
 866          * The my_id structure isn't used by the SM_UNMON_ALL call, as far
 867          * as I know.  Leave it empty for now.
 868          */
 869         memset(&id, 0, sizeof(id));
 870         id.my_name = name;
 871
 872         /*
 873          * !!!
 874          * The statd program must already be registered when lockd runs.
 875          */
 876         do {
 877                 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
 878                     (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
 879                 if (ret == RPC_PROGUNAVAIL) {
 880                         syslog(LOG_WARNING, "%lu %s", SM_PROG,
 881                             clnt_sperrno(ret));
 882                         sleep(2);
 883                         continue;
 884                 }
 885                 break;
 886         } while (0);
 887
 888         if (ret != 0) {
 889                 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
 890                 exit(1);
 891         }
 892
 893         nsm_state = stat.state;
 894
 895         /* setup constant data for SM_MON calls */
 896         mon_host.mon_id.my_id.my_name = localhost;
 897         mon_host.mon_id.my_id.my_prog = NLM_PROG;
 898         mon_host.mon_id.my_id.my_vers = NLM_SM;
 899         mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY;  /* bsdi addition */
 900 }
 901
 902 /*
 903  * Out of memory, fatal
 904  */
 905 void out_of_mem()
 906 {
 907         syslog(LOG_ERR, "out of memory");
 908         exit(2);
 909 }