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
  98 static int      create_service(struct netconfig *nconf);
  99 static void     complete_service(struct netconfig *nconf, char *port_str);
 100 static void     clearout_service(void);
 101 void    lookup_addresses(struct netconfig *nconf);
 102 void    init_nsm(void);
 103 void    nlm_prog_0(struct svc_req *, SVCXPRT *);
 104 void    nlm_prog_1(struct svc_req *, SVCXPRT *);
 105 void    nlm_prog_3(struct svc_req *, SVCXPRT *);
 106 void    nlm_prog_4(struct svc_req *, SVCXPRT *);
 107 void    out_of_mem(void);
 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 = hosts;
 151                         hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 152                         if (hosts_bak == NULL) {
 153                                 if (hosts != NULL) {
 154                                         for (i = 0; i < nhosts; i++)
 155                                                 free(hosts[i]);
 156                                         free(hosts);
 157                                         out_of_mem();
 158                                 }
 159                         }
 160                         hosts = hosts_bak;
 161                         hosts[nhosts - 1] = strdup(optarg);
 162                         if (hosts[nhosts - 1] == NULL) {
 163                                 for (i = 0; i < (nhosts - 1); i++)
 164                                         free(hosts[i]);
 165                                 free(hosts);
 166                                 out_of_mem();
 167                         }
 168                         break;
 169                 case 'p':
 170                         endptr = NULL;
 171                         svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 172                         if (endptr == NULL || *endptr != '\0' ||
 173                             svcport == 0 || svcport >= IPPORT_MAX)
 174                                 usage();
 175                         svcport_str = strdup(optarg);
 176                         break;
 177                 default:
 178                 case '?':
 179                         usage();
 180                         /* NOTREACHED */
 181                 }
 182         }
 183         if (geteuid()) { /* This command allowed only to root */
 184                 fprintf(stderr, "Sorry. You are not superuser\n");
 185                 exit(1);
 186         }
 187
 188         kernel_lockd = FALSE;
 189         kernel_lockd_client = FALSE;
 190         if (modfind("nfslockd") < 0) {
 191                 if (kldload("nfslockd") < 0) {
 192                         fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
 193                 } else {
 194                         kernel_lockd = TRUE;
 195                 }
 196         } else {
 197                 kernel_lockd = TRUE;
 198         }
 199         if (kernel_lockd) {
 200                 if (getosreldate() >= 800040)
 201                         kernel_lockd_client = TRUE;
 202         }
 203
 204         (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
 205         (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
 206         (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
 207         (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
 208
 209         /*
 210          * Check if IPv6 support is present.
 211          */
 212         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 213         if (s < 0)
 214                 have_v6 = 0;
 215         else
 216                 close(s);
 217
 218         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 219
 220         /*
 221          * If no hosts were specified, add a wildcard entry to bind to
 222          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 223          * list.
 224          */
 225         if (nhosts == 0) {
 226                 hosts = malloc(sizeof(char**));
 227                 if (hosts == NULL)
 228                         out_of_mem();
 229
 230                 hosts[0] = "*";
 231                 nhosts = 1;
 232         } else {
 233                 hosts_bak = hosts;
 234                 if (have_v6) {
 235                         hosts_bak = realloc(hosts, (nhosts + 2) *
 236                             sizeof(char *));
 237                         if (hosts_bak == NULL) {
 238                                 for (i = 0; i < nhosts; i++)
 239                                         free(hosts[i]);
 240                                 free(hosts);
 241                                 out_of_mem();
 242                         } else
 243                                 hosts = hosts_bak;
 244
 245                         nhosts += 2;
 246                         hosts[nhosts - 2] = "::1";
 247                 } else {
 248                         hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 249                         if (hosts_bak == NULL) {
 250                                 for (i = 0; i < nhosts; i++)
 251                                         free(hosts[i]);
 252
 253                                 free(hosts);
 254                                 out_of_mem();
 255                         } else {
 256                                 nhosts += 1;
 257                                 hosts = hosts_bak;
 258                         }
 259                 }
 260                 hosts[nhosts - 1] = "127.0.0.1";
 261         }
 262
 263         if (kernel_lockd) {
 264                 if (!kernel_lockd_client) {
 265                         /*
 266                          * For the case where we have a kernel lockd but it
 267                          * doesn't provide client locking, we run a cut-down
 268                          * RPC service on a local-domain socket. The kernel's
 269                          * RPC server will pass what it can't handle (mainly
 270                          * client replies) down to us.
 271                          */
 272                         struct sockaddr_un sun;
 273                         int fd, oldmask;
 274                         SVCXPRT *xprt;
 275
 276                         memset(&sun, 0, sizeof sun);
 277                         sun.sun_family = AF_LOCAL;
 278                         unlink(_PATH_RPCLOCKDSOCK);
 279                         strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
 280                         sun.sun_len = SUN_LEN(&sun);
 281                         fd = socket(AF_LOCAL, SOCK_STREAM, 0);
 282                         if (!fd) {
 283                                 err(1, "Can't create local lockd socket");
 284                         }
 285                         oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
 286                         if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
 287                                 err(1, "Can't bind local lockd socket");
 288                         }
 289                         umask(oldmask);
 290                         if (listen(fd, SOMAXCONN) < 0) {
 291                                 err(1, "Can't listen on local lockd socket");
 292                         }
 293                         xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 294                         if (!xprt) {
 295                                 err(1, "Can't create transport for local lockd socket");
 296                         }
 297                         if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
 298                                 err(1, "Can't register service for local lockd socket");
 299                         }
 300                 }
 301
 302                 /*
 303                  * We need to look up the addresses so that we can
 304                  * hand uaddrs (ascii encoded address+port strings) to
 305                  * the kernel.
 306                  */
 307                 nc_handle = setnetconfig();
 308                 while ((nconf = getnetconfig(nc_handle))) {
 309                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 310                         if (nconf->nc_flag & NC_VISIBLE) {
 311                                 /* Skip if there's no IPv6 support */
 312                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 313                                         /* DO NOTHING */
 314                                 } else {
 315                                         lookup_addresses(nconf);
 316                                 }
 317                         }
 318                 }
 319                 endnetconfig(nc_handle);
 320         } else {
 321                 attempt_cnt = 1;
 322                 sock_fdcnt = 0;
 323                 sock_fd = NULL;
 324                 port_list = NULL;
 325                 port_len = 0;
 326                 nc_handle = setnetconfig();
 327                 while ((nconf = getnetconfig(nc_handle))) {
 328                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 329                         if (nconf->nc_flag & NC_VISIBLE) {
 330                                 /* Skip if there's no IPv6 support */
 331                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 332                                         /* DO NOTHING */
 333                                 } else {
 334                                         ret = create_service(nconf);
 335                                         if (ret == 1)
 336                                                 /* Ignore this call */
 337                                                 continue;
 338                                         if (ret < 0) {
 339                                                 /*
 340                                                  * Failed to bind port, so close
 341                                                  * off all sockets created and
 342                                                  * try again if the port# was
 343                                                  * dynamically assigned via
 344                                                  * bind(2).
 345                                                  */
 346                                                 clearout_service();
 347                                                 if (mallocd_svcport != 0 &&
 348                                                     attempt_cnt <
 349                                                     GETPORT_MAXTRY) {
 350                                                         free(svcport_str);
 351                                                         svcport_str = NULL;
 352                                                         mallocd_svcport = 0;
 353                                                 } else {
 354                                                         errno = EADDRINUSE;
 355                                                         syslog(LOG_ERR,
 356                                                          "bindresvport_sa: %m");
 357                                                         exit(1);
 358                                                 }
 359
 360                                                 /*
 361                                                  * Start over at the first
 362                                                  * service.
 363                                                  */
 364                                                 free(sock_fd);
 365                                                 sock_fdcnt = 0;
 366                                                 sock_fd = NULL;
 367                                                 nc_handle = setnetconfig();
 368                                                 attempt_cnt++;
 369                                         } else if (mallocd_svcport != 0 &&
 370                                             attempt_cnt == GETPORT_MAXTRY) {
 371                                                 /*
 372                                                  * For the last attempt, allow
 373                                                  * different port #s for each
 374                                                  * nconf by saving the
 375                                                  * svcport_str and setting it
 376                                                  * back to NULL.
 377                                                  */
 378                                                 port_list = realloc(port_list,
 379                                                     (port_len + 1) *
 380                                                     sizeof(char *));
 381                                                 if (port_list == NULL)
 382                                                         out_of_mem();
 383                                                 port_list[port_len++] =
 384                                                     svcport_str;
 385                                                 svcport_str = NULL;
 386                                                 mallocd_svcport = 0;
 387                                         }
 388                                 }
 389                         }
 390                 }
 391
 392                 /*
 393                  * Successfully bound the ports, so call complete_service() to
 394                  * do the rest of the setup on the service(s).
 395                  */
 396                 sock_fdpos = 0;
 397                 port_pos = 0;
 398                 nc_handle = setnetconfig();
 399                 while ((nconf = getnetconfig(nc_handle))) {
 400                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 401                         if (nconf->nc_flag & NC_VISIBLE) {
 402                                 /* Skip if there's no IPv6 support */
 403                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 404                                         /* DO NOTHING */
 405                                 } else if (port_list != NULL) {
 406                                         if (port_pos >= port_len) {
 407                                                 syslog(LOG_ERR,
 408                                                     "too many port#s");
 409                                                 exit(1);
 410                                         }
 411                                         complete_service(nconf,
 412                                             port_list[port_pos++]);
 413                                 } else
 414                                         complete_service(nconf, svcport_str);
 415                         }
 416                 }
 417                 endnetconfig(nc_handle);
 418                 free(sock_fd);
 419                 if (port_list != NULL) {
 420                         for (port_pos = 0; port_pos < port_len; port_pos++)
 421                                 free(port_list[port_pos]);
 422                         free(port_list);
 423                 }
 424         }
 425
 426         /*
 427          * Note that it is NOT sensible to run this program from inetd - the
 428          * protocol assumes that it will run immediately at boot time.
 429          */
 430         if (daemon(0, debug_level > 0)) {
 431                 err(1, "cannot fork");
 432                 /* NOTREACHED */
 433         }
 434
 435         openlog("rpc.lockd", 0, LOG_DAEMON);
 436         if (debug_level)
 437                 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
 438         else
 439                 syslog(LOG_INFO, "Starting");
 440
 441         sigalarm.sa_handler = (sig_t) sigalarm_handler;
 442         sigemptyset(&sigalarm.sa_mask);
 443         sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
 444         sigalarm.sa_flags |= SA_RESTART;
 445         if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
 446                 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
 447                     strerror(errno));
 448                 exit(1);
 449         }
 450
 451         if (kernel_lockd) {
 452                 if (!kernel_lockd_client) {
 453                         init_nsm();
 454                         client_pid = client_request();
 455
 456                         /*
 457                          * Create a child process to enter the kernel and then
 458                          * wait for RPCs on our local domain socket.
 459                          */
 460                         if (!fork())
 461                                 nlm_syscall(debug_level, grace_period,
 462                                     naddrs, addrs);
 463                         else
 464                                 svc_run();
 465                 } else {
 466                         /*
 467                          * The kernel lockd implementation provides
 468                          * both client and server so we don't need to
 469                          * do anything else.
 470                          */
 471                         nlm_syscall(debug_level, grace_period, naddrs, addrs);
 472                 }
 473         } else {
 474                 grace_expired = 0;
 475                 alarm(grace_period);
 476
 477                 init_nsm();
 478
 479                 client_pid = client_request();
 480
 481                 svc_run();              /* Should never return */
 482         }
 483         exit(1);
 484 }
 485
 486 /*
 487  * This routine creates and binds sockets on the appropriate
 488  * addresses. It gets called one time for each transport.
 489  * It returns 0 upon success, 1 for ingore the call and -1 to indicate
 490  * bind failed with EADDRINUSE.
 491  * Any file descriptors that have been created are stored in sock_fd and
 492  * the total count of them is maintained in sock_fdcnt.
 493  */
 494 static int
 495 create_service(struct netconfig *nconf)
 496 {
 497         struct addrinfo hints, *res = NULL;
 498         struct sockaddr_in *sin;
 499         struct sockaddr_in6 *sin6;
 500         struct __rpc_sockinfo si;
 501         int aicode;
 502         int fd;
 503         int nhostsbak;
 504         int r;
 505         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 506         int mallocd_res;
 507
 508         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 509             (nconf->nc_semantics != NC_TPI_COTS) &&
 510             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 511                 return (1);     /* not my type */
 512
 513         /*
 514          * XXX - using RPC library internal functions.
 515          */
 516         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 517                 syslog(LOG_ERR, "cannot get information for %s",
 518                     nconf->nc_netid);
 519                 return (1);
 520         }
 521
 522         /* Get rpc.statd's address on this transport */
 523         memset(&hints, 0, sizeof hints);
 524         hints.ai_flags = AI_PASSIVE;
 525         hints.ai_family = si.si_af;
 526         hints.ai_socktype = si.si_socktype;
 527         hints.ai_protocol = si.si_proto;
 528
 529         /*
 530          * Bind to specific IPs if asked to
 531          */
 532         nhostsbak = nhosts;
 533         while (nhostsbak > 0) {
 534                 --nhostsbak;
 535                 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
 536                 if (sock_fd == NULL)
 537                         out_of_mem();
 538                 sock_fd[sock_fdcnt++] = -1;     /* Set invalid for now. */
 539                 mallocd_res = 0;
 540
 541                 /*
 542                  * XXX - using RPC library internal functions.
 543                  */
 544                 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 545                         syslog(LOG_ERR, "cannot create socket for %s",
 546                             nconf->nc_netid);
 547                         continue;
 548                 }
 549
 550                 switch (hints.ai_family) {
 551                         case AF_INET:
 552                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 553                                     host_addr) == 1) {
 554                                         hints.ai_flags |= AI_NUMERICHOST;
 555                                 } else {
 556                                         /*
 557                                          * Skip if we have an AF_INET6 address.
 558                                          */
 559                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 560                                             host_addr) == 1) {
 561                                                 close(fd);
 562                                                 continue;
 563                                         }
 564                                 }
 565                                 break;
 566                         case AF_INET6:
 567                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 568                                     host_addr) == 1) {
 569                                         hints.ai_flags |= AI_NUMERICHOST;
 570                                 } else {
 571                                         /*
 572                                          * Skip if we have an AF_INET address.
 573                                          */
 574                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 575                                             host_addr) == 1) {
 576                                                 close(fd);
 577                                                 continue;
 578                                         }
 579                                 }
 580                                 break;
 581                         default:
 582                                 break;
 583                 }
 584
 585                 /*
 586                  * If no hosts were specified, just bind to INADDR_ANY
 587                  */
 588                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 589                         if (svcport_str == NULL) {
 590                                 res = malloc(sizeof(struct addrinfo));
 591                                 if (res == NULL)
 592                                         out_of_mem();
 593                                 mallocd_res = 1;
 594                                 res->ai_flags = hints.ai_flags;
 595                                 res->ai_family = hints.ai_family;
 596                                 res->ai_protocol = hints.ai_protocol;
 597                                 switch (res->ai_family) {
 598                                         case AF_INET:
 599                                                 sin = malloc(sizeof(struct sockaddr_in));
 600                                                 if (sin == NULL)
 601                                                         out_of_mem();
 602                                                 sin->sin_family = AF_INET;
 603                                                 sin->sin_port = htons(0);
 604                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 605                                                 res->ai_addr = (struct sockaddr*) sin;
 606                                                 res->ai_addrlen = (socklen_t)
 607                                                     sizeof(struct sockaddr_in);
 608                                                 break;
 609                                         case AF_INET6:
 610                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 611                                                 if (sin6 == NULL)
 612                                                         out_of_mem();
 613                                                 sin6->sin6_family = AF_INET6;
 614                                                 sin6->sin6_port = htons(0);
 615                                                 sin6->sin6_addr = in6addr_any;
 616                                                 res->ai_addr = (struct sockaddr*) sin6;
 617                                                 res->ai_addrlen = (socklen_t)
 618                                                     sizeof(struct sockaddr_in6);
 619                                                 break;
 620                                         default:
 621                                                 syslog(LOG_ERR,
 622                                                     "bad addr fam %d",
 623                                                     res->ai_family);
 624                                                 exit(1);
 625                                 }
 626                         } else {
 627                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 628                                     &hints, &res)) != 0) {
 629                                         syslog(LOG_ERR,
 630                                             "cannot get local address for %s: %s",
 631                                             nconf->nc_netid,
 632                                             gai_strerror(aicode));
 633                                         close(fd);
 634                                         continue;
 635                                 }
 636                         }
 637                 } else {
 638                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 639                             &hints, &res)) != 0) {
 640                                 syslog(LOG_ERR,
 641                                     "cannot get local address for %s: %s",
 642                                     nconf->nc_netid, gai_strerror(aicode));
 643                                 close(fd);
 644                                 continue;
 645                         }
 646                 }
 647
 648
 649                 /* Store the fd. */
 650                 sock_fd[sock_fdcnt - 1] = fd;
 651
 652                 /* Now, attempt the bind. */
 653                 r = bindresvport_sa(fd, res->ai_addr);
 654                 if (r != 0) {
 655                         if (errno == EADDRINUSE && mallocd_svcport != 0) {
 656                                 if (mallocd_res != 0) {
 657                                         free(res->ai_addr);
 658                                         free(res);
 659                                 } else
 660                                         freeaddrinfo(res);
 661                                 return (-1);
 662                         }
 663                         syslog(LOG_ERR, "bindresvport_sa: %m");
 664                         exit(1);
 665                 }
 666
 667                 if (svcport_str == NULL) {
 668                         svcport_str = malloc(NI_MAXSERV * sizeof(char));
 669                         if (svcport_str == NULL)
 670                                 out_of_mem();
 671                         mallocd_svcport = 1;
 672
 673                         if (getnameinfo(res->ai_addr,
 674                             res->ai_addr->sa_len, NULL, NI_MAXHOST,
 675                             svcport_str, NI_MAXSERV * sizeof(char),
 676                             NI_NUMERICHOST | NI_NUMERICSERV))
 677                                 errx(1, "Cannot get port number");
 678                 }
 679                 if (mallocd_res != 0) {
 680                         free(res->ai_addr);
 681                         free(res);
 682                 } else
 683                         freeaddrinfo(res);
 684                 res = NULL;
 685         }
 686         return (0);
 687 }
 688
 689 /*
 690  * Called after all the create_service() calls have succeeded, to complete
 691  * the setup and registration.
 692  */
 693 static void
 694 complete_service(struct netconfig *nconf, char *port_str)
 695 {
 696         struct addrinfo hints, *res = NULL;
 697         struct __rpc_sockinfo si;
 698         struct netbuf servaddr;
 699         SVCXPRT *transp = NULL;
 700         int aicode, fd, nhostsbak;
 701         int registered = 0;
 702
 703         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 704             (nconf->nc_semantics != NC_TPI_COTS) &&
 705             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 706                 return; /* not my type */
 707
 708         /*
 709          * XXX - using RPC library internal functions.
 710          */
 711         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 712                 syslog(LOG_ERR, "cannot get information for %s",
 713                     nconf->nc_netid);
 714                 return;
 715         }
 716
 717         nhostsbak = nhosts;
 718         while (nhostsbak > 0) {
 719                 --nhostsbak;
 720                 if (sock_fdpos >= sock_fdcnt) {
 721                         /* Should never happen. */
 722                         syslog(LOG_ERR, "Ran out of socket fd's");
 723                         return;
 724                 }
 725                 fd = sock_fd[sock_fdpos++];
 726                 if (fd < 0)
 727                         continue;
 728
 729                 if (nconf->nc_semantics != NC_TPI_CLTS)
 730                     listen(fd, SOMAXCONN);
 731
 732                 transp = svc_tli_create(fd, nconf, NULL,
 733                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 734
 735                 if (transp != (SVCXPRT *) NULL) {
 736                         if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
 737                             NULL))
 738                                 syslog(LOG_ERR,
 739                                     "can't register %s NLM_PROG, NLM_SM service",
 740                                     nconf->nc_netid);
 741
 742                         if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
 743                             NULL))
 744                                 syslog(LOG_ERR,
 745                                     "can't register %s NLM_PROG, NLM_VERS service",
 746                                     nconf->nc_netid);
 747
 748                         if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
 749                             NULL))
 750                                 syslog(LOG_ERR,
 751                                     "can't register %s NLM_PROG, NLM_VERSX service",
 752                                     nconf->nc_netid);
 753
 754                         if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
 755                             NULL))
 756                                 syslog(LOG_ERR,
 757                                     "can't register %s NLM_PROG, NLM_VERS4 service",
 758                                     nconf->nc_netid);
 759
 760                 } else
 761                         syslog(LOG_WARNING, "can't create %s services",
 762                             nconf->nc_netid);
 763
 764                 if (registered == 0) {
 765                         registered = 1;
 766                         memset(&hints, 0, sizeof hints);
 767                         hints.ai_flags = AI_PASSIVE;
 768                         hints.ai_family = si.si_af;
 769                         hints.ai_socktype = si.si_socktype;
 770                         hints.ai_protocol = si.si_proto;
 771
 772                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 773                             &res)) != 0) {
 774                                 syslog(LOG_ERR, "cannot get local address: %s",
 775                                     gai_strerror(aicode));
 776                                 exit(1);
 777                         }
 778
 779                         servaddr.buf = malloc(res->ai_addrlen);
 780                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 781                         servaddr.len = res->ai_addrlen;
 782
 783                         rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
 784                         rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
 785                         rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
 786                         rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
 787
 788                         xcreated++;
 789                         freeaddrinfo(res);
 790                 }
 791         } /* end while */
 792 }
 793
 794 /*
 795  * Clear out sockets after a failure to bind one of them, so that the
 796  * cycle of socket creation/binding can start anew.
 797  */
 798 static void
 799 clearout_service(void)
 800 {
 801         int i;
 802
 803         for (i = 0; i < sock_fdcnt; i++) {
 804                 if (sock_fd[i] >= 0) {
 805                         shutdown(sock_fd[i], SHUT_RDWR);
 806                         close(sock_fd[i]);
 807                 }
 808         }
 809 }
 810
 811 /*
 812  * Look up addresses for the kernel to create transports for.
 813  */
 814 void
 815 lookup_addresses(struct netconfig *nconf)
 816 {
 817         struct addrinfo hints, *res = NULL;
 818         struct sockaddr_in *sin;
 819         struct sockaddr_in6 *sin6;
 820         struct __rpc_sockinfo si;
 821         struct netbuf servaddr;
 822         SVCXPRT *transp = NULL;
 823         int aicode;
 824         int nhostsbak;
 825         int r;
 826         int registered = 0;
 827         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 828         char *uaddr;
 829
 830         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 831             (nconf->nc_semantics != NC_TPI_COTS) &&
 832             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 833                 return; /* not my type */
 834
 835         /*
 836          * XXX - using RPC library internal functions.
 837          */
 838         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 839                 syslog(LOG_ERR, "cannot get information for %s",
 840                     nconf->nc_netid);
 841                 return;
 842         }
 843
 844         /* Get rpc.statd's address on this transport */
 845         memset(&hints, 0, sizeof hints);
 846         hints.ai_flags = AI_PASSIVE;
 847         hints.ai_family = si.si_af;
 848         hints.ai_socktype = si.si_socktype;
 849         hints.ai_protocol = si.si_proto;
 850
 851         /*
 852          * Bind to specific IPs if asked to
 853          */
 854         nhostsbak = nhosts;
 855         while (nhostsbak > 0) {
 856                 --nhostsbak;
 857
 858                 switch (hints.ai_family) {
 859                         case AF_INET:
 860                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 861                                     host_addr) == 1) {
 862                                         hints.ai_flags &= AI_NUMERICHOST;
 863                                 } else {
 864                                         /*
 865                                          * Skip if we have an AF_INET6 address.
 866                                          */
 867                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 868                                             host_addr) == 1) {
 869                                                 continue;
 870                                         }
 871                                 }
 872                                 break;
 873                         case AF_INET6:
 874                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 875                                     host_addr) == 1) {
 876                                         hints.ai_flags &= AI_NUMERICHOST;
 877                                 } else {
 878                                         /*
 879                                          * Skip if we have an AF_INET address.
 880                                          */
 881                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 882                                             host_addr) == 1) {
 883                                                 continue;
 884                                         }
 885                                 }
 886                                 break;
 887                         default:
 888                                 break;
 889                 }
 890
 891                 /*
 892                  * If no hosts were specified, just bind to INADDR_ANY
 893                  */
 894                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 895                         if (svcport_str == NULL) {
 896                                 res = malloc(sizeof(struct addrinfo));
 897                                 if (res == NULL)
 898                                         out_of_mem();
 899                                 res->ai_flags = hints.ai_flags;
 900                                 res->ai_family = hints.ai_family;
 901                                 res->ai_protocol = hints.ai_protocol;
 902                                 switch (res->ai_family) {
 903                                         case AF_INET:
 904                                                 sin = malloc(sizeof(struct sockaddr_in));
 905                                                 if (sin == NULL)
 906                                                         out_of_mem();
 907                                                 sin->sin_family = AF_INET;
 908                                                 sin->sin_port = htons(0);
 909                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 910                                                 res->ai_addr = (struct sockaddr*) sin;
 911                                                 res->ai_addrlen = (socklen_t)
 912                                                     sizeof(res->ai_addr);
 913                                                 break;
 914                                         case AF_INET6:
 915                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 916                                                 if (sin6 == NULL)
 917                                                         out_of_mem();
 918                                                 sin6->sin6_family = AF_INET6;
 919                                                 sin6->sin6_port = htons(0);
 920                                                 sin6->sin6_addr = in6addr_any;
 921                                                 res->ai_addr = (struct sockaddr*) sin6;
 922                                                 res->ai_addrlen = (socklen_t) sizeof(res->ai_addr);
 923                                                 break;
 924                                         default:
 925                                                 break;
 926                                 }
 927                         } else {
 928                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 929                                     &hints, &res)) != 0) {
 930                                         syslog(LOG_ERR,
 931                                             "cannot get local address for %s: %s",
 932                                             nconf->nc_netid,
 933                                             gai_strerror(aicode));
 934                                         continue;
 935                                 }
 936                         }
 937                 } else {
 938                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 939                             &hints, &res)) != 0) {
 940                                 syslog(LOG_ERR,
 941                                     "cannot get local address for %s: %s",
 942                                     nconf->nc_netid, gai_strerror(aicode));
 943                                 continue;
 944                         }
 945                 }
 946
 947                 servaddr.len = servaddr.maxlen = res->ai_addr->sa_len;
 948                 servaddr.buf = res->ai_addr;
 949                 uaddr = taddr2uaddr(nconf, &servaddr);
 950
 951                 addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
 952                 if (!addrs)
 953                         out_of_mem();
 954                 addrs[2 * naddrs] = strdup(nconf->nc_netid);
 955                 addrs[2 * naddrs + 1] = uaddr;
 956                 naddrs++;
 957         } /* end while */
 958 }
 959
 960 void
 961 sigalarm_handler(void)
 962 {
 963
 964         grace_expired = 1;
 965 }
 966
 967 void
 968 usage()
 969 {
 970         errx(1, "usage: rpc.lockd [-d <debuglevel>]"
 971             " [-g <grace period>] [-h <bindip>] [-p <port>]");
 972 }
 973
 974 /*
 975  * init_nsm --
 976  *      Reset the NSM state-of-the-world and acquire its state.
 977  */
 978 void
 979 init_nsm(void)
 980 {
 981         enum clnt_stat ret;
 982         my_id id;
 983         sm_stat stat;
 984         char name[] = "NFS NLM";
 985         char localhost[] = "localhost";
 986
 987         /*
 988          * !!!
 989          * The my_id structure isn't used by the SM_UNMON_ALL call, as far
 990          * as I know.  Leave it empty for now.
 991          */
 992         memset(&id, 0, sizeof(id));
 993         id.my_name = name;
 994
 995         /*
 996          * !!!
 997          * The statd program must already be registered when lockd runs.
 998          */
 999         do {
1000                 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
1001                     (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
1002                 if (ret == RPC_PROGUNAVAIL) {
1003                         syslog(LOG_WARNING, "%lu %s", SM_PROG,
1004                             clnt_sperrno(ret));
1005                         sleep(2);
1006                         continue;
1007                 }
1008                 break;
1009         } while (0);
1010
1011         if (ret != 0) {
1012                 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
1013                 exit(1);
1014         }
1015
1016         nsm_state = stat.state;
1017
1018         /* setup constant data for SM_MON calls */
1019         mon_host.mon_id.my_id.my_name = localhost;
1020         mon_host.mon_id.my_id.my_prog = NLM_PROG;
1021         mon_host.mon_id.my_id.my_vers = NLM_SM;
1022         mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY;  /* bsdi addition */
1023 }
1024
1025 /*
1026  * Out of memory, fatal
1027  */
1028 void out_of_mem()
1029 {
1030         syslog(LOG_ERR, "out of memory");
1031         exit(2);
1032 }