usr.sbin/rpc.lockd/lockd.c

   1 /*      $NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $        */
   2 /*      $FreeBSD$ */
   3
   4 /*
   5  * Copyright (c) 1995
   6  *      A.R. Gordon (andrew.gordon@net-tel.co.uk).  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed for the FreeBSD project
  19  * 4. Neither the name of the author nor the names of any co-contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  */
  36
  37 #include <sys/cdefs.h>
  38 #ifndef lint
  39 __RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
  40 #endif
  41
  42 /*
  43  * main() function for NFS lock daemon.  Most of the code in this
  44  * file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
  45  *
  46  * The actual program logic is in the file lock_proc.c
  47  */
  48
  49 #include <sys/param.h>
  50 #include <sys/linker.h>
  51 #include <sys/module.h>
  52 #include <sys/socket.h>
  53 #include <sys/stat.h>
  54
  55 #include <netinet/in.h>
  56 #include <arpa/inet.h>
  57
  58 #include <err.h>
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <errno.h>
  62 #include <syslog.h>
  63 #include <signal.h>
  64 #include <string.h>
  65 #include <unistd.h>
  66 #include <libutil.h>
  67 #include <netconfig.h>
  68 #include <netdb.h>
  69
  70 #include <rpc/rpc.h>
  71 #include <rpc/rpc_com.h>
  72 #include <rpcsvc/sm_inter.h>
  73
  74 #include "lockd.h"
  75 #include <rpcsvc/nlm_prot.h>
  76
  77 #define GETPORT_MAXTRY  20      /* Max tries to get a port # */
  78
  79 int             debug_level = 0;        /* 0 = no debugging syslog() calls */
  80 int             _rpcsvcdirty = 0;
  81
  82 int grace_expired;
  83 int nsm_state;
  84 int kernel_lockd;
  85 int kernel_lockd_client;
  86 pid_t client_pid;
  87 struct mon mon_host;
  88 char **hosts, *svcport_str = NULL;
  89 static int      mallocd_svcport = 0;
  90 static int      *sock_fd;
  91 static int      sock_fdcnt;
  92 static int      sock_fdpos;
  93 int nhosts = 0;
  94 int xcreated = 0;
  95 char **addrs;                   /* actually (netid, uaddr) pairs */
  96 int naddrs;                     /* count of how many (netid, uaddr) pairs */
  97 char localhost[] = "localhost";
  98
  99 static int      create_service(struct netconfig *nconf);
 100 static void     complete_service(struct netconfig *nconf, char *port_str);
 101 static void     clearout_service(void);
 102 static void     out_of_mem(void) __dead2;
 103 void    init_nsm(void);
 104 void    usage(void);
 105
 106 void sigalarm_handler(void);
 107
 108 /*
 109  * XXX move to some header file.
 110  */
 111 #define _PATH_RPCLOCKDSOCK      "/var/run/rpclockd.sock"
 112
 113 int
 114 main(int argc, char **argv)
 115 {
 116         int ch, i, s;
 117         void *nc_handle;
 118         char *endptr, **hosts_bak;
 119         struct sigaction sigalarm;
 120         int grace_period = 30;
 121         struct netconfig *nconf;
 122         int have_v6 = 1;
 123         int maxrec = RPC_MAXDATASIZE;
 124         in_port_t svcport = 0;
 125         int attempt_cnt, port_len, port_pos, ret;
 126         char **port_list;
 127
 128         while ((ch = getopt(argc, argv, "d:g:h:p:")) != (-1)) {
 129                 switch (ch) {
 130                 case 'd':
 131                         debug_level = atoi(optarg);
 132                         if (!debug_level) {
 133                                 usage();
 134                                 /* NOTREACHED */
 135                         }
 136                         break;
 137                 case 'g':
 138                         grace_period = atoi(optarg);
 139                         if (!grace_period) {
 140                                 usage();
 141                                 /* NOTREACHED */
 142                         }
 143                         break;
 144                 case 'h':
 145                         ++nhosts;
 146                         hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 147                         if (hosts_bak == NULL) {
 148                                 if (hosts != NULL) {
 149                                         for (i = 0; i < nhosts; i++)
 150                                                 free(hosts[i]);
 151                                         free(hosts);
 152                                         out_of_mem();
 153                                 }
 154                         }
 155                         hosts = hosts_bak;
 156                         hosts[nhosts - 1] = strdup(optarg);
 157                         if (hosts[nhosts - 1] == NULL) {
 158                                 for (i = 0; i < (nhosts - 1); i++)
 159                                         free(hosts[i]);
 160                                 free(hosts);
 161                                 out_of_mem();
 162                         }
 163                         break;
 164                 case 'p':
 165                         endptr = NULL;
 166                         svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 167                         if (endptr == NULL || *endptr != '\0' ||
 168                             svcport == 0 || svcport >= IPPORT_MAX)
 169                                 usage();
 170                         svcport_str = strdup(optarg);
 171                         break;
 172                 default:
 173                         usage();
 174                         /* NOTREACHED */
 175                 }
 176         }
 177         if (geteuid()) { /* This command allowed only to root */
 178                 fprintf(stderr, "Sorry. You are not superuser\n");
 179                 exit(1);
 180         }
 181
 182         kernel_lockd = FALSE;
 183         kernel_lockd_client = FALSE;
 184         if (modfind("nfslockd") < 0) {
 185                 if (kldload("nfslockd") < 0) {
 186                         fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
 187                 } else {
 188                         kernel_lockd = TRUE;
 189                 }
 190         } else {
 191                 kernel_lockd = TRUE;
 192         }
 193         if (kernel_lockd) {
 194                 if (getosreldate() >= 800040)
 195                         kernel_lockd_client = TRUE;
 196         }
 197
 198         (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
 199         (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
 200         (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
 201         (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
 202
 203         /*
 204          * Check if IPv6 support is present.
 205          */
 206         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 207         if (s < 0)
 208                 have_v6 = 0;
 209         else
 210                 close(s);
 211
 212         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 213
 214         /*
 215          * If no hosts were specified, add a wildcard entry to bind to
 216          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 217          * list.
 218          */
 219         if (nhosts == 0) {
 220                 hosts = malloc(sizeof(char *));
 221                 if (hosts == NULL)
 222                         out_of_mem();
 223
 224                 hosts[0] = strdup("*");
 225                 nhosts = 1;
 226         } else {
 227                 if (have_v6) {
 228                         hosts_bak = realloc(hosts, (nhosts + 2) *
 229                             sizeof(char *));
 230                         if (hosts_bak == NULL) {
 231                                 for (i = 0; i < nhosts; i++)
 232                                         free(hosts[i]);
 233                                 free(hosts);
 234                                 out_of_mem();
 235                         } else
 236                                 hosts = hosts_bak;
 237
 238                         nhosts += 2;
 239                         hosts[nhosts - 2] = strdup("::1");
 240                 } else {
 241                         hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 242                         if (hosts_bak == NULL) {
 243                                 for (i = 0; i < nhosts; i++)
 244                                         free(hosts[i]);
 245
 246                                 free(hosts);
 247                                 out_of_mem();
 248                         } else {
 249                                 nhosts += 1;
 250                                 hosts = hosts_bak;
 251                         }
 252                 }
 253                 hosts[nhosts - 1] = strdup("127.0.0.1");
 254         }
 255
 256         if (kernel_lockd) {
 257                 if (!kernel_lockd_client) {
 258                         /*
 259                          * For the case where we have a kernel lockd but it
 260                          * doesn't provide client locking, we run a cut-down
 261                          * RPC service on a local-domain socket. The kernel's
 262                          * RPC server will pass what it can't handle (mainly
 263                          * client replies) down to us.
 264                          */
 265                         struct sockaddr_un sun;
 266                         int fd, oldmask;
 267                         SVCXPRT *xprt;
 268
 269                         memset(&sun, 0, sizeof sun);
 270                         sun.sun_family = AF_LOCAL;
 271                         unlink(_PATH_RPCLOCKDSOCK);
 272                         strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
 273                         sun.sun_len = SUN_LEN(&sun);
 274                         fd = socket(AF_LOCAL, SOCK_STREAM, 0);
 275                         if (!fd) {
 276                                 err(1, "Can't create local lockd socket");
 277                         }
 278                         oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
 279                         if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
 280                                 err(1, "Can't bind local lockd socket");
 281                         }
 282                         umask(oldmask);
 283                         if (listen(fd, SOMAXCONN) < 0) {
 284                                 err(1, "Can't listen on local lockd socket");
 285                         }
 286                         xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 287                         if (!xprt) {
 288                                 err(1, "Can't create transport for local lockd socket");
 289                         }
 290                         if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
 291                                 err(1, "Can't register service for local lockd socket");
 292                         }
 293                 }
 294
 295                 /*
 296                  * We need to look up the addresses so that we can
 297                  * hand uaddrs (ascii encoded address+port strings) to
 298                  * the kernel.
 299                  */
 300                 nc_handle = setnetconfig();
 301                 while ((nconf = getnetconfig(nc_handle))) {
 302                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 303                         if (nconf->nc_flag & NC_VISIBLE) {
 304                                 /* Skip if there's no IPv6 support */
 305                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 306                                         /* DO NOTHING */
 307                                 } else {
 308                                         create_service(nconf);
 309                                 }
 310                         }
 311                 }
 312                 endnetconfig(nc_handle);
 313         } else {
 314                 attempt_cnt = 1;
 315                 sock_fdcnt = 0;
 316                 sock_fd = NULL;
 317                 port_list = NULL;
 318                 port_len = 0;
 319                 nc_handle = setnetconfig();
 320                 while ((nconf = getnetconfig(nc_handle))) {
 321                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 322                         if (nconf->nc_flag & NC_VISIBLE) {
 323                                 /* Skip if there's no IPv6 support */
 324                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 325                                         /* DO NOTHING */
 326                                 } else {
 327                                         ret = create_service(nconf);
 328                                         if (ret == 1)
 329                                                 /* Ignore this call */
 330                                                 continue;
 331                                         if (ret < 0) {
 332                                                 /*
 333                                                  * Failed to bind port, so close
 334                                                  * off all sockets created and
 335                                                  * try again if the port# was
 336                                                  * dynamically assigned via
 337                                                  * bind(2).
 338                                                  */
 339                                                 clearout_service();
 340                                                 if (mallocd_svcport != 0 &&
 341                                                     attempt_cnt <
 342                                                     GETPORT_MAXTRY) {
 343                                                         free(svcport_str);
 344                                                         svcport_str = NULL;
 345                                                         mallocd_svcport = 0;
 346                                                 } else {
 347                                                         errno = EADDRINUSE;
 348                                                         syslog(LOG_ERR,
 349                                                          "bindresvport_sa: %m");
 350                                                         exit(1);
 351                                                 }
 352
 353                                                 /*
 354                                                  * Start over at the first
 355                                                  * service.
 356                                                  */
 357                                                 free(sock_fd);
 358                                                 sock_fdcnt = 0;
 359                                                 sock_fd = NULL;
 360                                                 nc_handle = setnetconfig();
 361                                                 attempt_cnt++;
 362                                         } else if (mallocd_svcport != 0 &&
 363                                             attempt_cnt == GETPORT_MAXTRY) {
 364                                                 /*
 365                                                  * For the last attempt, allow
 366                                                  * different port #s for each
 367                                                  * nconf by saving the
 368                                                  * svcport_str and setting it
 369                                                  * back to NULL.
 370                                                  */
 371                                                 port_list = realloc(port_list,
 372                                                     (port_len + 1) *
 373                                                     sizeof(char *));
 374                                                 if (port_list == NULL)
 375                                                         out_of_mem();
 376                                                 port_list[port_len++] =
 377                                                     svcport_str;
 378                                                 svcport_str = NULL;
 379                                                 mallocd_svcport = 0;
 380                                         }
 381                                 }
 382                         }
 383                 }
 384
 385                 /*
 386                  * Successfully bound the ports, so call complete_service() to
 387                  * do the rest of the setup on the service(s).
 388                  */
 389                 sock_fdpos = 0;
 390                 port_pos = 0;
 391                 nc_handle = setnetconfig();
 392                 while ((nconf = getnetconfig(nc_handle))) {
 393                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 394                         if (nconf->nc_flag & NC_VISIBLE) {
 395                                 /* Skip if there's no IPv6 support */
 396                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 397                                         /* DO NOTHING */
 398                                 } else if (port_list != NULL) {
 399                                         if (port_pos >= port_len) {
 400                                                 syslog(LOG_ERR,
 401                                                     "too many port#s");
 402                                                 exit(1);
 403                                         }
 404                                         complete_service(nconf,
 405                                             port_list[port_pos++]);
 406                                 } else
 407                                         complete_service(nconf, svcport_str);
 408                         }
 409                 }
 410                 endnetconfig(nc_handle);
 411                 free(sock_fd);
 412                 if (port_list != NULL) {
 413                         for (port_pos = 0; port_pos < port_len; port_pos++)
 414                                 free(port_list[port_pos]);
 415                         free(port_list);
 416                 }
 417         }
 418
 419         /*
 420          * Note that it is NOT sensible to run this program from inetd - the
 421          * protocol assumes that it will run immediately at boot time.
 422          */
 423         if (daemon(0, debug_level > 0)) {
 424                 err(1, "cannot fork");
 425                 /* NOTREACHED */
 426         }
 427
 428         openlog("rpc.lockd", 0, LOG_DAEMON);
 429         if (debug_level)
 430                 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
 431         else
 432                 syslog(LOG_INFO, "Starting");
 433
 434         sigalarm.sa_handler = (sig_t) sigalarm_handler;
 435         sigemptyset(&sigalarm.sa_mask);
 436         sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
 437         sigalarm.sa_flags |= SA_RESTART;
 438         if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
 439                 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
 440                     strerror(errno));
 441                 exit(1);
 442         }
 443
 444         if (kernel_lockd) {
 445                 if (!kernel_lockd_client) {
 446                         init_nsm();
 447                         client_pid = client_request();
 448
 449                         /*
 450                          * Create a child process to enter the kernel and then
 451                          * wait for RPCs on our local domain socket.
 452                          */
 453                         if (!fork())
 454                                 nlm_syscall(debug_level, grace_period,
 455                                     naddrs, addrs);
 456                         else
 457                                 svc_run();
 458                 } else {
 459                         /*
 460                          * The kernel lockd implementation provides
 461                          * both client and server so we don't need to
 462                          * do anything else.
 463                          */
 464                         nlm_syscall(debug_level, grace_period, naddrs, addrs);
 465                 }
 466         } else {
 467                 grace_expired = 0;
 468                 alarm(grace_period);
 469
 470                 init_nsm();
 471
 472                 client_pid = client_request();
 473
 474                 svc_run();              /* Should never return */
 475         }
 476         exit(1);
 477 }
 478
 479 /*
 480  * This routine creates and binds sockets on the appropriate
 481  * addresses if lockd for user NLM, or perform a lookup of
 482  * addresses for the kernel to create transports.
 483  *
 484  * It gets called one time for each transport.
 485  *
 486  * It returns 0 upon success, 1 for ingore the call and -1 to indicate
 487  * bind failed with EADDRINUSE.
 488  *
 489  * Any file descriptors that have been created are stored in sock_fd and
 490  * the total count of them is maintained in sock_fdcnt.
 491  */
 492 static int
 493 create_service(struct netconfig *nconf)
 494 {
 495         struct addrinfo hints, *res = NULL;
 496         struct sockaddr_in *sin;
 497         struct sockaddr_in6 *sin6;
 498         struct __rpc_sockinfo si;
 499         int aicode;
 500         int fd;
 501         int nhostsbak;
 502         int r;
 503         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 504         int mallocd_res;
 505
 506         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 507             (nconf->nc_semantics != NC_TPI_COTS) &&
 508             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 509                 return (1);     /* not my type */
 510
 511         /*
 512          * XXX - using RPC library internal functions.
 513          */
 514         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 515                 syslog(LOG_ERR, "cannot get information for %s",
 516                     nconf->nc_netid);
 517                 return (1);
 518         }
 519
 520         /* Get rpc.statd's address on this transport */
 521         memset(&hints, 0, sizeof hints);
 522         hints.ai_family = si.si_af;
 523         hints.ai_socktype = si.si_socktype;
 524         hints.ai_protocol = si.si_proto;
 525
 526         /*
 527          * Bind to specific IPs if asked to
 528          */
 529         nhostsbak = nhosts;
 530         while (nhostsbak > 0) {
 531                 --nhostsbak;
 532                 mallocd_res = 0;
 533                 hints.ai_flags = AI_PASSIVE;
 534
 535                 if (!kernel_lockd) {
 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
 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
 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                                                 if (!kernel_lockd)
 563                                                         close(fd);
 564                                                 continue;
 565                                         }
 566                                 }
 567                                 break;
 568                         case AF_INET6:
 569                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 570                                     host_addr) == 1) {
 571                                         hints.ai_flags |= AI_NUMERICHOST;
 572                                 } else {
 573                                         /*
 574                                          * Skip if we have an AF_INET address.
 575                                          */
 576                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 577                                             host_addr) == 1) {
 578                                                 if (!kernel_lockd)
 579                                                         close(fd);
 580                                                 continue;
 581                                         }
 582                                 }
 583                                 break;
 584                         default:
 585                                 break;
 586                 }
 587
 588                 /*
 589                  * If no hosts were specified, just bind to INADDR_ANY
 590                  */
 591                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 592                         if (svcport_str == NULL) {
 593                                 if ((res = malloc(sizeof(struct addrinfo))) == NULL)
 594                                         out_of_mem();
 595                                 mallocd_res = 1;
 596                                 res->ai_flags = hints.ai_flags;
 597                                 res->ai_family = hints.ai_family;
 598                                 res->ai_protocol = hints.ai_protocol;
 599                                 switch (res->ai_family) {
 600                                         case AF_INET:
 601                                                 sin = malloc(sizeof(struct sockaddr_in));
 602                                                 if (sin == NULL)
 603                                                         out_of_mem();
 604                                                 sin->sin_family = AF_INET;
 605                                                 sin->sin_port = htons(0);
 606                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 607                                                 res->ai_addr = (struct sockaddr*) sin;
 608                                                 res->ai_addrlen = (socklen_t)
 609                                                     sizeof(struct sockaddr_in);
 610                                                 break;
 611                                         case AF_INET6:
 612                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 613                                                 if (sin6 == NULL)
 614                                                         out_of_mem();
 615                                                 sin6->sin6_family = AF_INET6;
 616                                                 sin6->sin6_port = htons(0);
 617                                                 sin6->sin6_addr = in6addr_any;
 618                                                 res->ai_addr = (struct sockaddr*) sin6;
 619                                                 res->ai_addrlen = (socklen_t)
 620                                                     sizeof(struct sockaddr_in6);
 621                                                 break;
 622                                         default:
 623                                                 syslog(LOG_ERR,
 624                                                     "bad address family %d",
 625                                                     res->ai_family);
 626                                                 exit(1);
 627                                 }
 628                         } else {
 629                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 630                                     &hints, &res)) != 0) {
 631                                         syslog(LOG_ERR,
 632                                             "cannot get local address for %s: %s",
 633                                             nconf->nc_netid,
 634                                             gai_strerror(aicode));
 635                                         if (!kernel_lockd)
 636                                                 close(fd);
 637                                         continue;
 638                                 }
 639                         }
 640                 } else {
 641                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 642                             &hints, &res)) != 0) {
 643                                 syslog(LOG_ERR,
 644                                     "cannot get local address for %s: %s",
 645                                     nconf->nc_netid, gai_strerror(aicode));
 646                                 if (!kernel_lockd)
 647                                         close(fd);
 648                                 continue;
 649                         }
 650                 }
 651
 652                 if (kernel_lockd) {
 653                         struct netbuf servaddr;
 654                         char *uaddr;
 655
 656                         /*
 657                          * Look up addresses for the kernel to create transports for.
 658                          */
 659                         servaddr.len = servaddr.maxlen = res->ai_addrlen;
 660                         servaddr.buf = res->ai_addr;
 661                         uaddr = taddr2uaddr(nconf, &servaddr);
 662
 663                         addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
 664                         if (!addrs)
 665                                 out_of_mem();
 666                         addrs[2 * naddrs] = strdup(nconf->nc_netid);
 667                         addrs[2 * naddrs + 1] = uaddr;
 668                         naddrs++;
 669                 } else {
 670                         /* Store the fd. */
 671                         sock_fd[sock_fdcnt - 1] = fd;
 672
 673                         /* Now, attempt the bind. */
 674                         r = bindresvport_sa(fd, res->ai_addr);
 675                         if (r != 0) {
 676                                 if (errno == EADDRINUSE && mallocd_svcport != 0) {
 677                                         if (mallocd_res != 0) {
 678                                                 free(res->ai_addr);
 679                                                 free(res);
 680                                         } else
 681                                                 freeaddrinfo(res);
 682                                         return (-1);
 683                                 }
 684                                 syslog(LOG_ERR, "bindresvport_sa: %m");
 685                                 exit(1);
 686                         }
 687
 688                         if (svcport_str == NULL) {
 689                                 svcport_str = malloc(NI_MAXSERV * sizeof(char));
 690                                 if (svcport_str == NULL)
 691                                         out_of_mem();
 692                                 mallocd_svcport = 1;
 693
 694                                 if (getnameinfo(res->ai_addr,
 695                                 res->ai_addr->sa_len, NULL, NI_MAXHOST,
 696                                 svcport_str, NI_MAXSERV * sizeof(char),
 697                                 NI_NUMERICHOST | NI_NUMERICSERV))
 698                                         errx(1, "Cannot get port number");
 699                         }
 700                 }
 701
 702                 if (mallocd_res != 0) {
 703                         free(res->ai_addr);
 704                         free(res);
 705                 } else
 706                         freeaddrinfo(res);
 707                 res = NULL;
 708         }
 709         return (0);
 710 }
 711
 712 /*
 713  * Called after all the create_service() calls have succeeded, to complete
 714  * the setup and registration.
 715  */
 716 static void
 717 complete_service(struct netconfig *nconf, char *port_str)
 718 {
 719         struct addrinfo hints, *res = NULL;
 720         struct __rpc_sockinfo si;
 721         struct netbuf servaddr;
 722         SVCXPRT *transp = NULL;
 723         int aicode, fd, nhostsbak;
 724         int registered = 0;
 725
 726         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 727             (nconf->nc_semantics != NC_TPI_COTS) &&
 728             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 729                 return; /* not my type */
 730
 731         /*
 732          * XXX - using RPC library internal functions.
 733          */
 734         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 735                 syslog(LOG_ERR, "cannot get information for %s",
 736                     nconf->nc_netid);
 737                 return;
 738         }
 739
 740         nhostsbak = nhosts;
 741         while (nhostsbak > 0) {
 742                 --nhostsbak;
 743                 if (sock_fdpos >= sock_fdcnt) {
 744                         /* Should never happen. */
 745                         syslog(LOG_ERR, "Ran out of socket fd's");
 746                         return;
 747                 }
 748                 fd = sock_fd[sock_fdpos++];
 749                 if (fd < 0)
 750                         continue;
 751
 752                 if (nconf->nc_semantics != NC_TPI_CLTS)
 753                     listen(fd, SOMAXCONN);
 754
 755                 transp = svc_tli_create(fd, nconf, NULL,
 756                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 757
 758                 if (transp != (SVCXPRT *) NULL) {
 759                         if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
 760                             NULL))
 761                                 syslog(LOG_ERR,
 762                                     "can't register %s NLM_PROG, NLM_SM service",
 763                                     nconf->nc_netid);
 764
 765                         if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
 766                             NULL))
 767                                 syslog(LOG_ERR,
 768                                     "can't register %s NLM_PROG, NLM_VERS service",
 769                                     nconf->nc_netid);
 770
 771                         if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
 772                             NULL))
 773                                 syslog(LOG_ERR,
 774                                     "can't register %s NLM_PROG, NLM_VERSX service",
 775                                     nconf->nc_netid);
 776
 777                         if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
 778                             NULL))
 779                                 syslog(LOG_ERR,
 780                                     "can't register %s NLM_PROG, NLM_VERS4 service",
 781                                     nconf->nc_netid);
 782
 783                 } else
 784                         syslog(LOG_WARNING, "can't create %s services",
 785                             nconf->nc_netid);
 786
 787                 if (registered == 0) {
 788                         registered = 1;
 789                         memset(&hints, 0, sizeof hints);
 790                         hints.ai_flags = AI_PASSIVE;
 791                         hints.ai_family = si.si_af;
 792                         hints.ai_socktype = si.si_socktype;
 793                         hints.ai_protocol = si.si_proto;
 794
 795                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 796                             &res)) != 0) {
 797                                 syslog(LOG_ERR, "cannot get local address: %s",
 798                                     gai_strerror(aicode));
 799                                 exit(1);
 800                         }
 801
 802                         servaddr.buf = malloc(res->ai_addrlen);
 803                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 804                         servaddr.len = res->ai_addrlen;
 805
 806                         rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
 807                         rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
 808                         rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
 809                         rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
 810
 811                         xcreated++;
 812                         freeaddrinfo(res);
 813                 }
 814         } /* end while */
 815 }
 816
 817 /*
 818  * Clear out sockets after a failure to bind one of them, so that the
 819  * cycle of socket creation/binding can start anew.
 820  */
 821 static void
 822 clearout_service(void)
 823 {
 824         int i;
 825
 826         for (i = 0; i < sock_fdcnt; i++) {
 827                 if (sock_fd[i] >= 0) {
 828                         shutdown(sock_fd[i], SHUT_RDWR);
 829                         close(sock_fd[i]);
 830                 }
 831         }
 832 }
 833
 834 void
 835 sigalarm_handler(void)
 836 {
 837
 838         grace_expired = 1;
 839 }
 840
 841 void
 842 usage()
 843 {
 844         errx(1, "usage: rpc.lockd [-d <debuglevel>]"
 845             " [-g <grace period>] [-h <bindip>] [-p <port>]");
 846 }
 847
 848 /*
 849  * init_nsm --
 850  *      Reset the NSM state-of-the-world and acquire its state.
 851  */
 852 void
 853 init_nsm(void)
 854 {
 855         enum clnt_stat ret;
 856         my_id id;
 857         sm_stat stat;
 858         char name[] = "NFS NLM";
 859
 860         /*
 861          * !!!
 862          * The my_id structure isn't used by the SM_UNMON_ALL call, as far
 863          * as I know.  Leave it empty for now.
 864          */
 865         memset(&id, 0, sizeof(id));
 866         id.my_name = name;
 867
 868         /*
 869          * !!!
 870          * The statd program must already be registered when lockd runs.
 871          */
 872         do {
 873                 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
 874                     (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
 875                 if (ret == RPC_PROGUNAVAIL) {
 876                         syslog(LOG_WARNING, "%lu %s", SM_PROG,
 877                             clnt_sperrno(ret));
 878                         sleep(2);
 879                         continue;
 880                 }
 881                 break;
 882         } while (0);
 883
 884         if (ret != 0) {
 885                 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
 886                 exit(1);
 887         }
 888
 889         nsm_state = stat.state;
 890
 891         /* setup constant data for SM_MON calls */
 892         mon_host.mon_id.my_id.my_name = localhost;
 893         mon_host.mon_id.my_id.my_prog = NLM_PROG;
 894         mon_host.mon_id.my_id.my_vers = NLM_SM;
 895         mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY;  /* bsdi addition */
 896 }
 897
 898 /*
 899  * Out of memory, fatal
 900  */
 901 void out_of_mem()
 902 {
 903         syslog(LOG_ERR, "out of memory");
 904         exit(2);
 905 }