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    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    out_of_mem(void);
 109 void    usage(void);
 110
 111 void sigalarm_handler(void);
 112
 113 /*
 114  * XXX move to some header file.
 115  */
 116 #define _PATH_RPCLOCKDSOCK      "/var/run/rpclockd.sock"
 117
 118 int
 119 main(int argc, char **argv)
 120 {
 121         int ch, i, s;
 122         void *nc_handle;
 123         char *endptr, **hosts_bak;
 124         struct sigaction sigalarm;
 125         int grace_period = 30;
 126         struct netconfig *nconf;
 127         int have_v6 = 1;
 128         int maxrec = RPC_MAXDATASIZE;
 129         in_port_t svcport = 0;
 130         int attempt_cnt, port_len, port_pos, ret;
 131         char **port_list;
 132
 133         while ((ch = getopt(argc, argv, "d:g:h:p:")) != (-1)) {
 134                 switch (ch) {
 135                 case 'd':
 136                         debug_level = atoi(optarg);
 137                         if (!debug_level) {
 138                                 usage();
 139                                 /* NOTREACHED */
 140                         }
 141                         break;
 142                 case 'g':
 143                         grace_period = atoi(optarg);
 144                         if (!grace_period) {
 145                                 usage();
 146                                 /* NOTREACHED */
 147                         }
 148                         break;
 149                 case 'h':
 150                         ++nhosts;
 151                         hosts_bak = hosts;
 152                         hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 153                         if (hosts_bak == NULL) {
 154                                 if (hosts != NULL) {
 155                                         for (i = 0; i < nhosts; i++)
 156                                                 free(hosts[i]);
 157                                         free(hosts);
 158                                         out_of_mem();
 159                                 }
 160                         }
 161                         hosts = hosts_bak;
 162                         hosts[nhosts - 1] = strdup(optarg);
 163                         if (hosts[nhosts - 1] == NULL) {
 164                                 for (i = 0; i < (nhosts - 1); i++)
 165                                         free(hosts[i]);
 166                                 free(hosts);
 167                                 out_of_mem();
 168                         }
 169                         break;
 170                 case 'p':
 171                         endptr = NULL;
 172                         svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 173                         if (endptr == NULL || *endptr != '\0' ||
 174                             svcport == 0 || svcport >= IPPORT_MAX)
 175                                 usage();
 176                         svcport_str = strdup(optarg);
 177                         break;
 178                 default:
 179                 case '?':
 180                         usage();
 181                         /* NOTREACHED */
 182                 }
 183         }
 184         if (geteuid()) { /* This command allowed only to root */
 185                 fprintf(stderr, "Sorry. You are not superuser\n");
 186                 exit(1);
 187         }
 188
 189         kernel_lockd = FALSE;
 190         kernel_lockd_client = FALSE;
 191         if (modfind("nfslockd") < 0) {
 192                 if (kldload("nfslockd") < 0) {
 193                         fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
 194                 } else {
 195                         kernel_lockd = TRUE;
 196                 }
 197         } else {
 198                 kernel_lockd = TRUE;
 199         }
 200         if (kernel_lockd) {
 201                 if (getosreldate() >= 800040)
 202                         kernel_lockd_client = TRUE;
 203         }
 204
 205         (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
 206         (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
 207         (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
 208         (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
 209
 210         /*
 211          * Check if IPv6 support is present.
 212          */
 213         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 214         if (s < 0)
 215                 have_v6 = 0;
 216         else
 217                 close(s);
 218
 219         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 220
 221         /*
 222          * If no hosts were specified, add a wildcard entry to bind to
 223          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 224          * list.
 225          */
 226         if (nhosts == 0) {
 227                 hosts = malloc(sizeof(char**));
 228                 if (hosts == NULL)
 229                         out_of_mem();
 230
 231                 hosts[0] = "*";
 232                 nhosts = 1;
 233         } else {
 234                 hosts_bak = hosts;
 235                 if (have_v6) {
 236                         hosts_bak = realloc(hosts, (nhosts + 2) *
 237                             sizeof(char *));
 238                         if (hosts_bak == NULL) {
 239                                 for (i = 0; i < nhosts; i++)
 240                                         free(hosts[i]);
 241                                 free(hosts);
 242                                 out_of_mem();
 243                         } else
 244                                 hosts = hosts_bak;
 245
 246                         nhosts += 2;
 247                         hosts[nhosts - 2] = "::1";
 248                 } else {
 249                         hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 250                         if (hosts_bak == NULL) {
 251                                 for (i = 0; i < nhosts; i++)
 252                                         free(hosts[i]);
 253
 254                                 free(hosts);
 255                                 out_of_mem();
 256                         } else {
 257                                 nhosts += 1;
 258                                 hosts = hosts_bak;
 259                         }
 260                 }
 261                 hosts[nhosts - 1] = "127.0.0.1";
 262         }
 263
 264         if (kernel_lockd) {
 265                 if (!kernel_lockd_client) {
 266                         /*
 267                          * For the case where we have a kernel lockd but it
 268                          * doesn't provide client locking, we run a cut-down
 269                          * RPC service on a local-domain socket. The kernel's
 270                          * RPC server will pass what it can't handle (mainly
 271                          * client replies) down to us.
 272                          */
 273                         struct sockaddr_un sun;
 274                         int fd, oldmask;
 275                         SVCXPRT *xprt;
 276
 277                         memset(&sun, 0, sizeof sun);
 278                         sun.sun_family = AF_LOCAL;
 279                         unlink(_PATH_RPCLOCKDSOCK);
 280                         strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
 281                         sun.sun_len = SUN_LEN(&sun);
 282                         fd = socket(AF_LOCAL, SOCK_STREAM, 0);
 283                         if (!fd) {
 284                                 err(1, "Can't create local lockd socket");
 285                         }
 286                         oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
 287                         if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
 288                                 err(1, "Can't bind local lockd socket");
 289                         }
 290                         umask(oldmask);
 291                         if (listen(fd, SOMAXCONN) < 0) {
 292                                 err(1, "Can't listen on local lockd socket");
 293                         }
 294                         xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 295                         if (!xprt) {
 296                                 err(1, "Can't create transport for local lockd socket");
 297                         }
 298                         if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
 299                                 err(1, "Can't register service for local lockd socket");
 300                         }
 301                 }
 302
 303                 /*
 304                  * We need to look up the addresses so that we can
 305                  * hand uaddrs (ascii encoded address+port strings) to
 306                  * the kernel.
 307                  */
 308                 nc_handle = setnetconfig();
 309                 while ((nconf = getnetconfig(nc_handle))) {
 310                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 311                         if (nconf->nc_flag & NC_VISIBLE) {
 312                                 /* Skip if there's no IPv6 support */
 313                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 314                                         /* DO NOTHING */
 315                                 } else {
 316                                         lookup_addresses(nconf);
 317                                 }
 318                         }
 319                 }
 320                 endnetconfig(nc_handle);
 321         } else {
 322                 attempt_cnt = 1;
 323                 sock_fdcnt = 0;
 324                 sock_fd = NULL;
 325                 port_list = NULL;
 326                 port_len = 0;
 327                 nc_handle = setnetconfig();
 328                 while ((nconf = getnetconfig(nc_handle))) {
 329                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 330                         if (nconf->nc_flag & NC_VISIBLE) {
 331                                 /* Skip if there's no IPv6 support */
 332                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 333                                         /* DO NOTHING */
 334                                 } else {
 335                                         ret = create_service(nconf);
 336                                         if (ret == 1)
 337                                                 /* Ignore this call */
 338                                                 continue;
 339                                         if (ret < 0) {
 340                                                 /*
 341                                                  * Failed to bind port, so close
 342                                                  * off all sockets created and
 343                                                  * try again if the port# was
 344                                                  * dynamically assigned via
 345                                                  * bind(2).
 346                                                  */
 347                                                 clearout_service();
 348                                                 if (mallocd_svcport != 0 &&
 349                                                     attempt_cnt <
 350                                                     GETPORT_MAXTRY) {
 351                                                         free(svcport_str);
 352                                                         svcport_str = NULL;
 353                                                         mallocd_svcport = 0;
 354                                                 } else {
 355                                                         errno = EADDRINUSE;
 356                                                         syslog(LOG_ERR,
 357                                                          "bindresvport_sa: %m");
 358                                                         exit(1);
 359                                                 }
 360
 361                                                 /*
 362                                                  * Start over at the first
 363                                                  * service.
 364                                                  */
 365                                                 free(sock_fd);
 366                                                 sock_fdcnt = 0;
 367                                                 sock_fd = NULL;
 368                                                 nc_handle = setnetconfig();
 369                                                 attempt_cnt++;
 370                                         } else if (mallocd_svcport != 0 &&
 371                                             attempt_cnt == GETPORT_MAXTRY) {
 372                                                 /*
 373                                                  * For the last attempt, allow
 374                                                  * different port #s for each
 375                                                  * nconf by saving the
 376                                                  * svcport_str and setting it
 377                                                  * back to NULL.
 378                                                  */
 379                                                 port_list = realloc(port_list,
 380                                                     (port_len + 1) *
 381                                                     sizeof(char *));
 382                                                 if (port_list == NULL)
 383                                                         out_of_mem();
 384                                                 port_list[port_len++] =
 385                                                     svcport_str;
 386                                                 svcport_str = NULL;
 387                                                 mallocd_svcport = 0;
 388                                         }
 389                                 }
 390                         }
 391                 }
 392
 393                 /*
 394                  * Successfully bound the ports, so call complete_service() to
 395                  * do the rest of the setup on the service(s).
 396                  */
 397                 sock_fdpos = 0;
 398                 port_pos = 0;
 399                 nc_handle = setnetconfig();
 400                 while ((nconf = getnetconfig(nc_handle))) {
 401                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 402                         if (nconf->nc_flag & NC_VISIBLE) {
 403                                 /* Skip if there's no IPv6 support */
 404                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 405                                         /* DO NOTHING */
 406                                 } else if (port_list != NULL) {
 407                                         if (port_pos >= port_len) {
 408                                                 syslog(LOG_ERR,
 409                                                     "too many port#s");
 410                                                 exit(1);
 411                                         }
 412                                         complete_service(nconf,
 413                                             port_list[port_pos++]);
 414                                 } else
 415                                         complete_service(nconf, svcport_str);
 416                         }
 417                 }
 418                 endnetconfig(nc_handle);
 419                 free(sock_fd);
 420                 if (port_list != NULL) {
 421                         for (port_pos = 0; port_pos < port_len; port_pos++)
 422                                 free(port_list[port_pos]);
 423                         free(port_list);
 424                 }
 425         }
 426
 427         /*
 428          * Note that it is NOT sensible to run this program from inetd - the
 429          * protocol assumes that it will run immediately at boot time.
 430          */
 431         if (daemon(0, debug_level > 0)) {
 432                 err(1, "cannot fork");
 433                 /* NOTREACHED */
 434         }
 435
 436         openlog("rpc.lockd", 0, LOG_DAEMON);
 437         if (debug_level)
 438                 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
 439         else
 440                 syslog(LOG_INFO, "Starting");
 441
 442         sigalarm.sa_handler = (sig_t) sigalarm_handler;
 443         sigemptyset(&sigalarm.sa_mask);
 444         sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
 445         sigalarm.sa_flags |= SA_RESTART;
 446         if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
 447                 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
 448                     strerror(errno));
 449                 exit(1);
 450         }
 451
 452         if (kernel_lockd) {
 453                 if (!kernel_lockd_client) {
 454                         init_nsm();
 455                         client_pid = client_request();
 456
 457                         /*
 458                          * Create a child process to enter the kernel and then
 459                          * wait for RPCs on our local domain socket.
 460                          */
 461                         if (!fork())
 462                                 nlm_syscall(debug_level, grace_period,
 463                                     naddrs, addrs);
 464                         else
 465                                 svc_run();
 466                 } else {
 467                         /*
 468                          * The kernel lockd implementation provides
 469                          * both client and server so we don't need to
 470                          * do anything else.
 471                          */
 472                         nlm_syscall(debug_level, grace_period, naddrs, addrs);
 473                 }
 474         } else {
 475                 grace_expired = 0;
 476                 alarm(grace_period);
 477
 478                 init_nsm();
 479
 480                 client_pid = client_request();
 481
 482                 svc_run();              /* Should never return */
 483         }
 484         exit(1);
 485 }
 486
 487 /*
 488  * This routine creates and binds sockets on the appropriate
 489  * addresses. It gets called one time for each transport.
 490  * It returns 0 upon success, 1 for ingore the call and -1 to indicate
 491  * bind failed with EADDRINUSE.
 492  * Any file descriptors that have been created are stored in sock_fd and
 493  * the total count of them is maintained in sock_fdcnt.
 494  */
 495 static int
 496 create_service(struct netconfig *nconf)
 497 {
 498         struct addrinfo hints, *res = NULL;
 499         struct sockaddr_in *sin;
 500         struct sockaddr_in6 *sin6;
 501         struct __rpc_sockinfo si;
 502         int aicode;
 503         int fd;
 504         int nhostsbak;
 505         int r;
 506         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 507         int mallocd_res;
 508
 509         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 510             (nconf->nc_semantics != NC_TPI_COTS) &&
 511             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 512                 return (1);     /* not my type */
 513
 514         /*
 515          * XXX - using RPC library internal functions.
 516          */
 517         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 518                 syslog(LOG_ERR, "cannot get information for %s",
 519                     nconf->nc_netid);
 520                 return (1);
 521         }
 522
 523         /* Get rpc.statd's address on this transport */
 524         memset(&hints, 0, sizeof hints);
 525         hints.ai_flags = AI_PASSIVE;
 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                 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
 537                 if (sock_fd == NULL)
 538                         out_of_mem();
 539                 sock_fd[sock_fdcnt++] = -1;     /* Set invalid for now. */
 540                 mallocd_res = 0;
 541
 542                 /*
 543                  * XXX - using RPC library internal functions.
 544                  */
 545                 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 546                         syslog(LOG_ERR, "cannot create socket for %s",
 547                             nconf->nc_netid);
 548                         continue;
 549                 }
 550
 551                 switch (hints.ai_family) {
 552                         case AF_INET:
 553                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 554                                     host_addr) == 1) {
 555                                         hints.ai_flags |= AI_NUMERICHOST;
 556                                 } else {
 557                                         /*
 558                                          * Skip if we have an AF_INET6 address.
 559                                          */
 560                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 561                                             host_addr) == 1) {
 562                                                 close(fd);
 563                                                 continue;
 564                                         }
 565                                 }
 566                                 break;
 567                         case AF_INET6:
 568                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 569                                     host_addr) == 1) {
 570                                         hints.ai_flags |= AI_NUMERICHOST;
 571                                 } else {
 572                                         /*
 573                                          * Skip if we have an AF_INET address.
 574                                          */
 575                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 576                                             host_addr) == 1) {
 577                                                 close(fd);
 578                                                 continue;
 579                                         }
 580                                 }
 581                                 break;
 582                         default:
 583                                 break;
 584                 }
 585
 586                 /*
 587                  * If no hosts were specified, just bind to INADDR_ANY
 588                  */
 589                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 590                         if (svcport_str == NULL) {
 591                                 res = malloc(sizeof(struct addrinfo));
 592                                 if (res == NULL)
 593                                         out_of_mem();
 594                                 mallocd_res = 1;
 595                                 res->ai_flags = hints.ai_flags;
 596                                 res->ai_family = hints.ai_family;
 597                                 res->ai_protocol = hints.ai_protocol;
 598                                 switch (res->ai_family) {
 599                                         case AF_INET:
 600                                                 sin = malloc(sizeof(struct sockaddr_in));
 601                                                 if (sin == NULL)
 602                                                         out_of_mem();
 603                                                 sin->sin_family = AF_INET;
 604                                                 sin->sin_port = htons(0);
 605                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 606                                                 res->ai_addr = (struct sockaddr*) sin;
 607                                                 res->ai_addrlen = (socklen_t)
 608                                                     sizeof(struct sockaddr_in);
 609                                                 break;
 610                                         case AF_INET6:
 611                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 612                                                 if (sin6 == NULL)
 613                                                         out_of_mem();
 614                                                 sin6->sin6_family = AF_INET6;
 615                                                 sin6->sin6_port = htons(0);
 616                                                 sin6->sin6_addr = in6addr_any;
 617                                                 res->ai_addr = (struct sockaddr*) sin6;
 618                                                 res->ai_addrlen = (socklen_t)
 619                                                     sizeof(struct sockaddr_in6);
 620                                                 break;
 621                                         default:
 622                                                 syslog(LOG_ERR,
 623                                                     "bad addr fam %d",
 624                                                     res->ai_family);
 625                                                 exit(1);
 626                                 }
 627                         } else {
 628                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 629                                     &hints, &res)) != 0) {
 630                                         syslog(LOG_ERR,
 631                                             "cannot get local address for %s: %s",
 632                                             nconf->nc_netid,
 633                                             gai_strerror(aicode));
 634                                         close(fd);
 635                                         continue;
 636                                 }
 637                         }
 638                 } else {
 639                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 640                             &hints, &res)) != 0) {
 641                                 syslog(LOG_ERR,
 642                                     "cannot get local address for %s: %s",
 643                                     nconf->nc_netid, gai_strerror(aicode));
 644                                 close(fd);
 645                                 continue;
 646                         }
 647                 }
 648
 649
 650                 /* Store the fd. */
 651                 sock_fd[sock_fdcnt - 1] = fd;
 652
 653                 /* Now, attempt the bind. */
 654                 r = bindresvport_sa(fd, res->ai_addr);
 655                 if (r != 0) {
 656                         if (errno == EADDRINUSE && mallocd_svcport != 0) {
 657                                 if (mallocd_res != 0) {
 658                                         free(res->ai_addr);
 659                                         free(res);
 660                                 } else
 661                                         freeaddrinfo(res);
 662                                 return (-1);
 663                         }
 664                         syslog(LOG_ERR, "bindresvport_sa: %m");
 665                         exit(1);
 666                 }
 667
 668                 if (svcport_str == NULL) {
 669                         svcport_str = malloc(NI_MAXSERV * sizeof(char));
 670                         if (svcport_str == NULL)
 671                                 out_of_mem();
 672                         mallocd_svcport = 1;
 673
 674                         if (getnameinfo(res->ai_addr,
 675                             res->ai_addr->sa_len, NULL, NI_MAXHOST,
 676                             svcport_str, NI_MAXSERV * sizeof(char),
 677                             NI_NUMERICHOST | NI_NUMERICSERV))
 678                                 errx(1, "Cannot get port number");
 679                 }
 680                 if (mallocd_res != 0) {
 681                         free(res->ai_addr);
 682                         free(res);
 683                 } else
 684                         freeaddrinfo(res);
 685                 res = NULL;
 686         }
 687         return (0);
 688 }
 689
 690 /*
 691  * Called after all the create_service() calls have succeeded, to complete
 692  * the setup and registration.
 693  */
 694 static void
 695 complete_service(struct netconfig *nconf, char *port_str)
 696 {
 697         struct addrinfo hints, *res = NULL;
 698         struct __rpc_sockinfo si;
 699         struct netbuf servaddr;
 700         SVCXPRT *transp = NULL;
 701         int aicode, fd, nhostsbak;
 702         int registered = 0;
 703
 704         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 705             (nconf->nc_semantics != NC_TPI_COTS) &&
 706             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 707                 return; /* not my type */
 708
 709         /*
 710          * XXX - using RPC library internal functions.
 711          */
 712         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 713                 syslog(LOG_ERR, "cannot get information for %s",
 714                     nconf->nc_netid);
 715                 return;
 716         }
 717
 718         nhostsbak = nhosts;
 719         while (nhostsbak > 0) {
 720                 --nhostsbak;
 721                 if (sock_fdpos >= sock_fdcnt) {
 722                         /* Should never happen. */
 723                         syslog(LOG_ERR, "Ran out of socket fd's");
 724                         return;
 725                 }
 726                 fd = sock_fd[sock_fdpos++];
 727                 if (fd < 0)
 728                         continue;
 729
 730                 if (nconf->nc_semantics != NC_TPI_CLTS)
 731                     listen(fd, SOMAXCONN);
 732
 733                 transp = svc_tli_create(fd, nconf, NULL,
 734                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 735
 736                 if (transp != (SVCXPRT *) NULL) {
 737                         if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
 738                             NULL))
 739                                 syslog(LOG_ERR,
 740                                     "can't register %s NLM_PROG, NLM_SM service",
 741                                     nconf->nc_netid);
 742
 743                         if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
 744                             NULL))
 745                                 syslog(LOG_ERR,
 746                                     "can't register %s NLM_PROG, NLM_VERS service",
 747                                     nconf->nc_netid);
 748
 749                         if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
 750                             NULL))
 751                                 syslog(LOG_ERR,
 752                                     "can't register %s NLM_PROG, NLM_VERSX service",
 753                                     nconf->nc_netid);
 754
 755                         if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
 756                             NULL))
 757                                 syslog(LOG_ERR,
 758                                     "can't register %s NLM_PROG, NLM_VERS4 service",
 759                                     nconf->nc_netid);
 760
 761                 } else
 762                         syslog(LOG_WARNING, "can't create %s services",
 763                             nconf->nc_netid);
 764
 765                 if (registered == 0) {
 766                         registered = 1;
 767                         memset(&hints, 0, sizeof hints);
 768                         hints.ai_flags = AI_PASSIVE;
 769                         hints.ai_family = si.si_af;
 770                         hints.ai_socktype = si.si_socktype;
 771                         hints.ai_protocol = si.si_proto;
 772
 773                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 774                             &res)) != 0) {
 775                                 syslog(LOG_ERR, "cannot get local address: %s",
 776                                     gai_strerror(aicode));
 777                                 exit(1);
 778                         }
 779
 780                         servaddr.buf = malloc(res->ai_addrlen);
 781                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 782                         servaddr.len = res->ai_addrlen;
 783
 784                         rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
 785                         rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
 786                         rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
 787                         rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
 788
 789                         xcreated++;
 790                         freeaddrinfo(res);
 791                 }
 792         } /* end while */
 793 }
 794
 795 /*
 796  * Clear out sockets after a failure to bind one of them, so that the
 797  * cycle of socket creation/binding can start anew.
 798  */
 799 static void
 800 clearout_service(void)
 801 {
 802         int i;
 803
 804         for (i = 0; i < sock_fdcnt; i++) {
 805                 if (sock_fd[i] >= 0) {
 806                         shutdown(sock_fd[i], SHUT_RDWR);
 807                         close(sock_fd[i]);
 808                 }
 809         }
 810 }
 811
 812 /*
 813  * Look up addresses for the kernel to create transports for.
 814  */
 815 void
 816 lookup_addresses(struct netconfig *nconf)
 817 {
 818         struct addrinfo hints, *res = NULL;
 819         struct sockaddr_in *sin;
 820         struct sockaddr_in6 *sin6;
 821         struct __rpc_sockinfo si;
 822         struct netbuf servaddr;
 823         int aicode;
 824         int nhostsbak;
 825         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 826         char *uaddr;
 827
 828         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 829             (nconf->nc_semantics != NC_TPI_COTS) &&
 830             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 831                 return; /* not my type */
 832
 833         /*
 834          * XXX - using RPC library internal functions.
 835          */
 836         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 837                 syslog(LOG_ERR, "cannot get information for %s",
 838                     nconf->nc_netid);
 839                 return;
 840         }
 841
 842         /* Get rpc.statd's address on this transport */
 843         memset(&hints, 0, sizeof hints);
 844         hints.ai_flags = AI_PASSIVE;
 845         hints.ai_family = si.si_af;
 846         hints.ai_socktype = si.si_socktype;
 847         hints.ai_protocol = si.si_proto;
 848
 849         /*
 850          * Bind to specific IPs if asked to
 851          */
 852         nhostsbak = nhosts;
 853         while (nhostsbak > 0) {
 854                 --nhostsbak;
 855
 856                 switch (hints.ai_family) {
 857                         case AF_INET:
 858                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 859                                     host_addr) == 1) {
 860                                         hints.ai_flags &= AI_NUMERICHOST;
 861                                 } else {
 862                                         /*
 863                                          * Skip if we have an AF_INET6 address.
 864                                          */
 865                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 866                                             host_addr) == 1) {
 867                                                 continue;
 868                                         }
 869                                 }
 870                                 break;
 871                         case AF_INET6:
 872                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 873                                     host_addr) == 1) {
 874                                         hints.ai_flags &= AI_NUMERICHOST;
 875                                 } else {
 876                                         /*
 877                                          * Skip if we have an AF_INET address.
 878                                          */
 879                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 880                                             host_addr) == 1) {
 881                                                 continue;
 882                                         }
 883                                 }
 884                                 break;
 885                         default:
 886                                 break;
 887                 }
 888
 889                 /*
 890                  * If no hosts were specified, just bind to INADDR_ANY
 891                  */
 892                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 893                         if (svcport_str == NULL) {
 894                                 res = malloc(sizeof(struct addrinfo));
 895                                 if (res == NULL)
 896                                         out_of_mem();
 897                                 res->ai_flags = hints.ai_flags;
 898                                 res->ai_family = hints.ai_family;
 899                                 res->ai_protocol = hints.ai_protocol;
 900                                 switch (res->ai_family) {
 901                                         case AF_INET:
 902                                                 sin = malloc(sizeof(struct sockaddr_in));
 903                                                 if (sin == NULL)
 904                                                         out_of_mem();
 905                                                 sin->sin_family = AF_INET;
 906                                                 sin->sin_port = htons(0);
 907                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 908                                                 res->ai_addr = (struct sockaddr*) sin;
 909                                                 res->ai_addrlen = (socklen_t)
 910                                                     sizeof(res->ai_addr);
 911                                                 break;
 912                                         case AF_INET6:
 913                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 914                                                 if (sin6 == NULL)
 915                                                         out_of_mem();
 916                                                 sin6->sin6_family = AF_INET6;
 917                                                 sin6->sin6_port = htons(0);
 918                                                 sin6->sin6_addr = in6addr_any;
 919                                                 res->ai_addr = (struct sockaddr*) sin6;
 920                                                 res->ai_addrlen = (socklen_t) sizeof(res->ai_addr);
 921                                                 break;
 922                                         default:
 923                                                 break;
 924                                 }
 925                         } else {
 926                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 927                                     &hints, &res)) != 0) {
 928                                         syslog(LOG_ERR,
 929                                             "cannot get local address for %s: %s",
 930                                             nconf->nc_netid,
 931                                             gai_strerror(aicode));
 932                                         continue;
 933                                 }
 934                         }
 935                 } else {
 936                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 937                             &hints, &res)) != 0) {
 938                                 syslog(LOG_ERR,
 939                                     "cannot get local address for %s: %s",
 940                                     nconf->nc_netid, gai_strerror(aicode));
 941                                 continue;
 942                         }
 943                 }
 944
 945                 servaddr.len = servaddr.maxlen = res->ai_addr->sa_len;
 946                 servaddr.buf = res->ai_addr;
 947                 uaddr = taddr2uaddr(nconf, &servaddr);
 948
 949                 addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
 950                 if (!addrs)
 951                         out_of_mem();
 952                 addrs[2 * naddrs] = strdup(nconf->nc_netid);
 953                 addrs[2 * naddrs + 1] = uaddr;
 954                 naddrs++;
 955         } /* end while */
 956 }
 957
 958 void
 959 sigalarm_handler(void)
 960 {
 961
 962         grace_expired = 1;
 963 }
 964
 965 void
 966 usage()
 967 {
 968         errx(1, "usage: rpc.lockd [-d <debuglevel>]"
 969             " [-g <grace period>] [-h <bindip>] [-p <port>]");
 970 }
 971
 972 /*
 973  * init_nsm --
 974  *      Reset the NSM state-of-the-world and acquire its state.
 975  */
 976 void
 977 init_nsm(void)
 978 {
 979         enum clnt_stat ret;
 980         my_id id;
 981         sm_stat stat;
 982         char name[] = "NFS NLM";
 983
 984         /*
 985          * !!!
 986          * The my_id structure isn't used by the SM_UNMON_ALL call, as far
 987          * as I know.  Leave it empty for now.
 988          */
 989         memset(&id, 0, sizeof(id));
 990         id.my_name = name;
 991
 992         /*
 993          * !!!
 994          * The statd program must already be registered when lockd runs.
 995          */
 996         do {
 997                 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
 998                     (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
 999                 if (ret == RPC_PROGUNAVAIL) {
1000                         syslog(LOG_WARNING, "%lu %s", SM_PROG,
1001                             clnt_sperrno(ret));
1002                         sleep(2);
1003                         continue;
1004                 }
1005                 break;
1006         } while (0);
1007
1008         if (ret != 0) {
1009                 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
1010                 exit(1);
1011         }
1012
1013         nsm_state = stat.state;
1014
1015         /* setup constant data for SM_MON calls */
1016         mon_host.mon_id.my_id.my_name = localhost;
1017         mon_host.mon_id.my_id.my_prog = NLM_PROG;
1018         mon_host.mon_id.my_id.my_vers = NLM_SM;
1019         mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY;  /* bsdi addition */
1020 }
1021
1022 /*
1023  * Out of memory, fatal
1024  */
1025 void out_of_mem()
1026 {
1027         syslog(LOG_ERR, "out of memory");
1028         exit(2);
1029 }