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  * SPDX-License-Identifier: BSD-4-Clause
   6  *
   7  * Copyright (c) 1995
   8  *      A.R. Gordon (andrew.gordon@net-tel.co.uk).  All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed for the FreeBSD project
  21  * 4. Neither the name of the author nor the names of any co-contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  */
  38
  39 #include <sys/cdefs.h>
  40 #ifndef lint
  41 __RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
  42 #endif
  43
  44 /*
  45  * main() function for NFS lock daemon.  Most of the code in this
  46  * file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
  47  *
  48  * The actual program logic is in the file lock_proc.c
  49  */
  50
  51 #include <sys/param.h>
  52 #include <sys/linker.h>
  53 #include <sys/module.h>
  54 #include <sys/socket.h>
  55 #include <sys/stat.h>
  56
  57 #include <netinet/in.h>
  58 #include <arpa/inet.h>
  59
  60 #include <err.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <errno.h>
  64 #include <syslog.h>
  65 #include <signal.h>
  66 #include <string.h>
  67 #include <unistd.h>
  68 #include <libutil.h>
  69 #include <netconfig.h>
  70 #include <netdb.h>
  71
  72 #include <rpc/rpc.h>
  73 #include <rpc/rpc_com.h>
  74 #include <rpcsvc/sm_inter.h>
  75
  76 #include "lockd.h"
  77 #include <rpcsvc/nlm_prot.h>
  78
  79 #define GETPORT_MAXTRY  20      /* Max tries to get a port # */
  80
  81 int             debug_level = 0;        /* 0 = no debugging syslog() calls */
  82 int             _rpcsvcdirty = 0;
  83
  84 int grace_expired;
  85 int nsm_state;
  86 int kernel_lockd;
  87 int kernel_lockd_client;
  88 pid_t client_pid;
  89 struct mon mon_host;
  90 char **hosts, *svcport_str = NULL;
  91 static int      mallocd_svcport = 0;
  92 static int      *sock_fd;
  93 static int      sock_fdcnt;
  94 static int      sock_fdpos;
  95 int nhosts = 0;
  96 int xcreated = 0;
  97 char **addrs;                   /* actually (netid, uaddr) pairs */
  98 int naddrs;                     /* count of how many (netid, uaddr) pairs */
  99 char localhost[] = "localhost";
 100
 101 static int      create_service(struct netconfig *nconf);
 102 static void     complete_service(struct netconfig *nconf, char *port_str);
 103 static void     clearout_service(void);
 104 static void     out_of_mem(void) __dead2;
 105 void    init_nsm(void);
 106 void    usage(void);
 107
 108 void sigalarm_handler(void);
 109
 110 /*
 111  * XXX move to some header file.
 112  */
 113 #define _PATH_RPCLOCKDSOCK      "/var/run/rpclockd.sock"
 114
 115 int
 116 main(int argc, char **argv)
 117 {
 118         int ch, i, s;
 119         void *nc_handle;
 120         char *endptr, **hosts_bak;
 121         struct sigaction sigalarm;
 122         int grace_period = 30;
 123         struct netconfig *nconf;
 124         int have_v6 = 1;
 125         int maxrec = RPC_MAXDATASIZE;
 126         in_port_t svcport = 0;
 127         int attempt_cnt, port_len, port_pos, ret;
 128         char **port_list;
 129
 130         while ((ch = getopt(argc, argv, "d:g:h:p:")) != (-1)) {
 131                 switch (ch) {
 132                 case 'd':
 133                         debug_level = atoi(optarg);
 134                         if (!debug_level) {
 135                                 usage();
 136                                 /* NOTREACHED */
 137                         }
 138                         break;
 139                 case 'g':
 140                         grace_period = atoi(optarg);
 141                         if (!grace_period) {
 142                                 usage();
 143                                 /* NOTREACHED */
 144                         }
 145                         break;
 146                 case 'h':
 147                         ++nhosts;
 148                         hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 149                         if (hosts_bak == NULL) {
 150                                 if (hosts != NULL) {
 151                                         for (i = 0; i < nhosts; i++)
 152                                                 free(hosts[i]);
 153                                         free(hosts);
 154                                         out_of_mem();
 155                                 }
 156                         }
 157                         hosts = hosts_bak;
 158                         hosts[nhosts - 1] = strdup(optarg);
 159                         if (hosts[nhosts - 1] == NULL) {
 160                                 for (i = 0; i < (nhosts - 1); i++)
 161                                         free(hosts[i]);
 162                                 free(hosts);
 163                                 out_of_mem();
 164                         }
 165                         break;
 166                 case 'p':
 167                         endptr = NULL;
 168                         svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 169                         if (endptr == NULL || *endptr != '\0' ||
 170                             svcport == 0 || svcport >= IPPORT_MAX)
 171                                 usage();
 172                         svcport_str = strdup(optarg);
 173                         break;
 174                 default:
 175                         usage();
 176                         /* NOTREACHED */
 177                 }
 178         }
 179         if (geteuid()) { /* This command allowed only to root */
 180                 fprintf(stderr, "Sorry. You are not superuser\n");
 181                 exit(1);
 182         }
 183
 184         kernel_lockd = FALSE;
 185         kernel_lockd_client = FALSE;
 186         if (modfind("nfslockd") < 0) {
 187                 if (kldload("nfslockd") < 0) {
 188                         fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
 189                 } else {
 190                         kernel_lockd = TRUE;
 191                 }
 192         } else {
 193                 kernel_lockd = TRUE;
 194         }
 195         if (kernel_lockd) {
 196                 if (getosreldate() >= 800040)
 197                         kernel_lockd_client = TRUE;
 198         }
 199
 200         (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
 201         (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
 202         (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
 203         (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
 204
 205         /*
 206          * Check if IPv6 support is present.
 207          */
 208         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 209         if (s < 0)
 210                 have_v6 = 0;
 211         else
 212                 close(s);
 213
 214         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 215
 216         /*
 217          * If no hosts were specified, add a wildcard entry to bind to
 218          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 219          * list.
 220          */
 221         if (nhosts == 0) {
 222                 hosts = malloc(sizeof(char *));
 223                 if (hosts == NULL)
 224                         out_of_mem();
 225
 226                 hosts[0] = strdup("*");
 227                 nhosts = 1;
 228         } else {
 229                 if (have_v6) {
 230                         hosts_bak = realloc(hosts, (nhosts + 2) *
 231                             sizeof(char *));
 232                         if (hosts_bak == NULL) {
 233                                 for (i = 0; i < nhosts; i++)
 234                                         free(hosts[i]);
 235                                 free(hosts);
 236                                 out_of_mem();
 237                         } else
 238                                 hosts = hosts_bak;
 239
 240                         nhosts += 2;
 241                         hosts[nhosts - 2] = strdup("::1");
 242                 } else {
 243                         hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 244                         if (hosts_bak == NULL) {
 245                                 for (i = 0; i < nhosts; i++)
 246                                         free(hosts[i]);
 247
 248                                 free(hosts);
 249                                 out_of_mem();
 250                         } else {
 251                                 nhosts += 1;
 252                                 hosts = hosts_bak;
 253                         }
 254                 }
 255                 hosts[nhosts - 1] = strdup("127.0.0.1");
 256         }
 257
 258         if (kernel_lockd) {
 259                 if (!kernel_lockd_client) {
 260                         /*
 261                          * For the case where we have a kernel lockd but it
 262                          * doesn't provide client locking, we run a cut-down
 263                          * RPC service on a local-domain socket. The kernel's
 264                          * RPC server will pass what it can't handle (mainly
 265                          * client replies) down to us.
 266                          */
 267                         struct sockaddr_un sun;
 268                         int fd, oldmask;
 269                         SVCXPRT *xprt;
 270
 271                         memset(&sun, 0, sizeof sun);
 272                         sun.sun_family = AF_LOCAL;
 273                         unlink(_PATH_RPCLOCKDSOCK);
 274                         strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
 275                         sun.sun_len = SUN_LEN(&sun);
 276                         fd = socket(AF_LOCAL, SOCK_STREAM, 0);
 277                         if (!fd) {
 278                                 err(1, "Can't create local lockd socket");
 279                         }
 280                         oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
 281                         if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
 282                                 err(1, "Can't bind local lockd socket");
 283                         }
 284                         umask(oldmask);
 285                         if (listen(fd, SOMAXCONN) < 0) {
 286                                 err(1, "Can't listen on local lockd socket");
 287                         }
 288                         xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 289                         if (!xprt) {
 290                                 err(1, "Can't create transport for local lockd socket");
 291                         }
 292                         if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
 293                                 err(1, "Can't register service for local lockd socket");
 294                         }
 295                 }
 296
 297                 /*
 298                  * We need to look up the addresses so that we can
 299                  * hand uaddrs (ascii encoded address+port strings) to
 300                  * the kernel.
 301                  */
 302                 nc_handle = setnetconfig();
 303                 while ((nconf = getnetconfig(nc_handle))) {
 304                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 305                         if (nconf->nc_flag & NC_VISIBLE) {
 306                                 /* Skip if there's no IPv6 support */
 307                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 308                                         /* DO NOTHING */
 309                                 } else {
 310                                         create_service(nconf);
 311                                 }
 312                         }
 313                 }
 314                 endnetconfig(nc_handle);
 315         } else {
 316                 attempt_cnt = 1;
 317                 sock_fdcnt = 0;
 318                 sock_fd = NULL;
 319                 port_list = NULL;
 320                 port_len = 0;
 321                 nc_handle = setnetconfig();
 322                 while ((nconf = getnetconfig(nc_handle))) {
 323                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 324                         if (nconf->nc_flag & NC_VISIBLE) {
 325                                 /* Skip if there's no IPv6 support */
 326                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 327                                         /* DO NOTHING */
 328                                 } else {
 329                                         ret = create_service(nconf);
 330                                         if (ret == 1)
 331                                                 /* Ignore this call */
 332                                                 continue;
 333                                         if (ret < 0) {
 334                                                 /*
 335                                                  * Failed to bind port, so close
 336                                                  * off all sockets created and
 337                                                  * try again if the port# was
 338                                                  * dynamically assigned via
 339                                                  * bind(2).
 340                                                  */
 341                                                 clearout_service();
 342                                                 if (mallocd_svcport != 0 &&
 343                                                     attempt_cnt <
 344                                                     GETPORT_MAXTRY) {
 345                                                         free(svcport_str);
 346                                                         svcport_str = NULL;
 347                                                         mallocd_svcport = 0;
 348                                                 } else {
 349                                                         errno = EADDRINUSE;
 350                                                         syslog(LOG_ERR,
 351                                                          "bindresvport_sa: %m");
 352                                                         exit(1);
 353                                                 }
 354
 355                                                 /*
 356                                                  * Start over at the first
 357                                                  * service.
 358                                                  */
 359                                                 free(sock_fd);
 360                                                 sock_fdcnt = 0;
 361                                                 sock_fd = NULL;
 362                                                 nc_handle = setnetconfig();
 363                                                 attempt_cnt++;
 364                                         } else if (mallocd_svcport != 0 &&
 365                                             attempt_cnt == GETPORT_MAXTRY) {
 366                                                 /*
 367                                                  * For the last attempt, allow
 368                                                  * different port #s for each
 369                                                  * nconf by saving the
 370                                                  * svcport_str and setting it
 371                                                  * back to NULL.
 372                                                  */
 373                                                 port_list = realloc(port_list,
 374                                                     (port_len + 1) *
 375                                                     sizeof(char *));
 376                                                 if (port_list == NULL)
 377                                                         out_of_mem();
 378                                                 port_list[port_len++] =
 379                                                     svcport_str;
 380                                                 svcport_str = NULL;
 381                                                 mallocd_svcport = 0;
 382                                         }
 383                                 }
 384                         }
 385                 }
 386
 387                 /*
 388                  * Successfully bound the ports, so call complete_service() to
 389                  * do the rest of the setup on the service(s).
 390                  */
 391                 sock_fdpos = 0;
 392                 port_pos = 0;
 393                 nc_handle = setnetconfig();
 394                 while ((nconf = getnetconfig(nc_handle))) {
 395                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 396                         if (nconf->nc_flag & NC_VISIBLE) {
 397                                 /* Skip if there's no IPv6 support */
 398                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 399                                         /* DO NOTHING */
 400                                 } else if (port_list != NULL) {
 401                                         if (port_pos >= port_len) {
 402                                                 syslog(LOG_ERR,
 403                                                     "too many port#s");
 404                                                 exit(1);
 405                                         }
 406                                         complete_service(nconf,
 407                                             port_list[port_pos++]);
 408                                 } else
 409                                         complete_service(nconf, svcport_str);
 410                         }
 411                 }
 412                 endnetconfig(nc_handle);
 413                 free(sock_fd);
 414                 if (port_list != NULL) {
 415                         for (port_pos = 0; port_pos < port_len; port_pos++)
 416                                 free(port_list[port_pos]);
 417                         free(port_list);
 418                 }
 419         }
 420
 421         /*
 422          * Note that it is NOT sensible to run this program from inetd - the
 423          * protocol assumes that it will run immediately at boot time.
 424          */
 425         if (daemon(0, debug_level > 0)) {
 426                 err(1, "cannot fork");
 427                 /* NOTREACHED */
 428         }
 429
 430         openlog("rpc.lockd", 0, LOG_DAEMON);
 431         if (debug_level)
 432                 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
 433         else
 434                 syslog(LOG_INFO, "Starting");
 435
 436         sigalarm.sa_handler = (sig_t) sigalarm_handler;
 437         sigemptyset(&sigalarm.sa_mask);
 438         sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
 439         sigalarm.sa_flags |= SA_RESTART;
 440         if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
 441                 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
 442                     strerror(errno));
 443                 exit(1);
 444         }
 445
 446         if (kernel_lockd) {
 447                 if (!kernel_lockd_client) {
 448                         init_nsm();
 449                         client_pid = client_request();
 450
 451                         /*
 452                          * Create a child process to enter the kernel and then
 453                          * wait for RPCs on our local domain socket.
 454                          */
 455                         if (!fork())
 456                                 nlm_syscall(debug_level, grace_period,
 457                                     naddrs, addrs);
 458                         else
 459                                 svc_run();
 460                 } else {
 461                         /*
 462                          * The kernel lockd implementation provides
 463                          * both client and server so we don't need to
 464                          * do anything else.
 465                          */
 466                         nlm_syscall(debug_level, grace_period, naddrs, addrs);
 467                 }
 468         } else {
 469                 grace_expired = 0;
 470                 alarm(grace_period);
 471
 472                 init_nsm();
 473
 474                 client_pid = client_request();
 475
 476                 svc_run();              /* Should never return */
 477         }
 478         exit(1);
 479 }
 480
 481 /*
 482  * This routine creates and binds sockets on the appropriate
 483  * addresses if lockd for user NLM, or perform a lookup of
 484  * addresses for the kernel to create transports.
 485  *
 486  * It gets called one time for each transport.
 487  *
 488  * It returns 0 upon success, 1 for ingore the call and -1 to indicate
 489  * bind failed with EADDRINUSE.
 490  *
 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_family = si.si_af;
 525         hints.ai_socktype = si.si_socktype;
 526         hints.ai_protocol = si.si_proto;
 527
 528         /*
 529          * Bind to specific IPs if asked to
 530          */
 531         nhostsbak = nhosts;
 532         while (nhostsbak > 0) {
 533                 --nhostsbak;
 534                 mallocd_res = 0;
 535                 hints.ai_flags = AI_PASSIVE;
 536
 537                 if (!kernel_lockd) {
 538                         sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
 539                         if (sock_fd == NULL)
 540                                 out_of_mem();
 541                         sock_fd[sock_fdcnt++] = -1;     /* Set invalid for now. */
 542
 543                         /*
 544                         * XXX - using RPC library internal functions.
 545                         */
 546                         if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 547                                 syslog(LOG_ERR, "cannot create socket for %s",
 548                                         nconf->nc_netid);
 549                                 continue;
 550                         }
 551                 }
 552
 553                 switch (hints.ai_family) {
 554                         case AF_INET:
 555                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 556                                     host_addr) == 1) {
 557                                         hints.ai_flags |= AI_NUMERICHOST;
 558                                 } else {
 559                                         /*
 560                                          * Skip if we have an AF_INET6 address.
 561                                          */
 562                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 563                                             host_addr) == 1) {
 564                                                 if (!kernel_lockd)
 565                                                         close(fd);
 566                                                 continue;
 567                                         }
 568                                 }
 569                                 break;
 570                         case AF_INET6:
 571                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 572                                     host_addr) == 1) {
 573                                         hints.ai_flags |= AI_NUMERICHOST;
 574                                 } else {
 575                                         /*
 576                                          * Skip if we have an AF_INET address.
 577                                          */
 578                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 579                                             host_addr) == 1) {
 580                                                 if (!kernel_lockd)
 581                                                         close(fd);
 582                                                 continue;
 583                                         }
 584                                 }
 585                                 break;
 586                         default:
 587                                 break;
 588                 }
 589
 590                 /*
 591                  * If no hosts were specified, just bind to INADDR_ANY
 592                  */
 593                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 594                         if (svcport_str == NULL) {
 595                                 if ((res = malloc(sizeof(struct addrinfo))) == NULL)
 596                                         out_of_mem();
 597                                 mallocd_res = 1;
 598                                 res->ai_flags = hints.ai_flags;
 599                                 res->ai_family = hints.ai_family;
 600                                 res->ai_protocol = hints.ai_protocol;
 601                                 switch (res->ai_family) {
 602                                         case AF_INET:
 603                                                 sin = malloc(sizeof(struct sockaddr_in));
 604                                                 if (sin == NULL)
 605                                                         out_of_mem();
 606                                                 sin->sin_family = AF_INET;
 607                                                 sin->sin_port = htons(0);
 608                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 609                                                 res->ai_addr = (struct sockaddr*) sin;
 610                                                 res->ai_addrlen = (socklen_t)
 611                                                     sizeof(struct sockaddr_in);
 612                                                 break;
 613                                         case AF_INET6:
 614                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 615                                                 if (sin6 == NULL)
 616                                                         out_of_mem();
 617                                                 sin6->sin6_family = AF_INET6;
 618                                                 sin6->sin6_port = htons(0);
 619                                                 sin6->sin6_addr = in6addr_any;
 620                                                 res->ai_addr = (struct sockaddr*) sin6;
 621                                                 res->ai_addrlen = (socklen_t)
 622                                                     sizeof(struct sockaddr_in6);
 623                                                 break;
 624                                         default:
 625                                                 syslog(LOG_ERR,
 626                                                     "bad address family %d",
 627                                                     res->ai_family);
 628                                                 exit(1);
 629                                 }
 630                         } else {
 631                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 632                                     &hints, &res)) != 0) {
 633                                         syslog(LOG_ERR,
 634                                             "cannot get local address for %s: %s",
 635                                             nconf->nc_netid,
 636                                             gai_strerror(aicode));
 637                                         if (!kernel_lockd)
 638                                                 close(fd);
 639                                         continue;
 640                                 }
 641                         }
 642                 } else {
 643                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 644                             &hints, &res)) != 0) {
 645                                 syslog(LOG_ERR,
 646                                     "cannot get local address for %s: %s",
 647                                     nconf->nc_netid, gai_strerror(aicode));
 648                                 if (!kernel_lockd)
 649                                         close(fd);
 650                                 continue;
 651                         }
 652                 }
 653
 654                 if (kernel_lockd) {
 655                         struct netbuf servaddr;
 656                         char *uaddr;
 657
 658                         /*
 659                          * Look up addresses for the kernel to create transports for.
 660                          */
 661                         servaddr.len = servaddr.maxlen = res->ai_addrlen;
 662                         servaddr.buf = res->ai_addr;
 663                         uaddr = taddr2uaddr(nconf, &servaddr);
 664
 665                         addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
 666                         if (!addrs)
 667                                 out_of_mem();
 668                         addrs[2 * naddrs] = strdup(nconf->nc_netid);
 669                         addrs[2 * naddrs + 1] = uaddr;
 670                         naddrs++;
 671                 } else {
 672                         /* Store the fd. */
 673                         sock_fd[sock_fdcnt - 1] = fd;
 674
 675                         /* Now, attempt the bind. */
 676                         r = bindresvport_sa(fd, res->ai_addr);
 677                         if (r != 0) {
 678                                 if (errno == EADDRINUSE && mallocd_svcport != 0) {
 679                                         if (mallocd_res != 0) {
 680                                                 free(res->ai_addr);
 681                                                 free(res);
 682                                         } else
 683                                                 freeaddrinfo(res);
 684                                         return (-1);
 685                                 }
 686                                 syslog(LOG_ERR, "bindresvport_sa: %m");
 687                                 exit(1);
 688                         }
 689
 690                         if (svcport_str == NULL) {
 691                                 svcport_str = malloc(NI_MAXSERV * sizeof(char));
 692                                 if (svcport_str == NULL)
 693                                         out_of_mem();
 694                                 mallocd_svcport = 1;
 695
 696                                 if (getnameinfo(res->ai_addr,
 697                                 res->ai_addr->sa_len, NULL, NI_MAXHOST,
 698                                 svcport_str, NI_MAXSERV * sizeof(char),
 699                                 NI_NUMERICHOST | NI_NUMERICSERV))
 700                                         errx(1, "Cannot get port number");
 701                         }
 702                 }
 703
 704                 if (mallocd_res != 0) {
 705                         free(res->ai_addr);
 706                         free(res);
 707                 } else
 708                         freeaddrinfo(res);
 709                 res = NULL;
 710         }
 711         return (0);
 712 }
 713
 714 /*
 715  * Called after all the create_service() calls have succeeded, to complete
 716  * the setup and registration.
 717  */
 718 static void
 719 complete_service(struct netconfig *nconf, char *port_str)
 720 {
 721         struct addrinfo hints, *res = NULL;
 722         struct __rpc_sockinfo si;
 723         struct netbuf servaddr;
 724         SVCXPRT *transp = NULL;
 725         int aicode, fd, nhostsbak;
 726         int registered = 0;
 727
 728         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 729             (nconf->nc_semantics != NC_TPI_COTS) &&
 730             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 731                 return; /* not my type */
 732
 733         /*
 734          * XXX - using RPC library internal functions.
 735          */
 736         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 737                 syslog(LOG_ERR, "cannot get information for %s",
 738                     nconf->nc_netid);
 739                 return;
 740         }
 741
 742         nhostsbak = nhosts;
 743         while (nhostsbak > 0) {
 744                 --nhostsbak;
 745                 if (sock_fdpos >= sock_fdcnt) {
 746                         /* Should never happen. */
 747                         syslog(LOG_ERR, "Ran out of socket fd's");
 748                         return;
 749                 }
 750                 fd = sock_fd[sock_fdpos++];
 751                 if (fd < 0)
 752                         continue;
 753
 754                 if (nconf->nc_semantics != NC_TPI_CLTS)
 755                     listen(fd, SOMAXCONN);
 756
 757                 transp = svc_tli_create(fd, nconf, NULL,
 758                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 759
 760                 if (transp != (SVCXPRT *) NULL) {
 761                         if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
 762                             NULL))
 763                                 syslog(LOG_ERR,
 764                                     "can't register %s NLM_PROG, NLM_SM service",
 765                                     nconf->nc_netid);
 766
 767                         if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
 768                             NULL))
 769                                 syslog(LOG_ERR,
 770                                     "can't register %s NLM_PROG, NLM_VERS service",
 771                                     nconf->nc_netid);
 772
 773                         if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
 774                             NULL))
 775                                 syslog(LOG_ERR,
 776                                     "can't register %s NLM_PROG, NLM_VERSX service",
 777                                     nconf->nc_netid);
 778
 779                         if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
 780                             NULL))
 781                                 syslog(LOG_ERR,
 782                                     "can't register %s NLM_PROG, NLM_VERS4 service",
 783                                     nconf->nc_netid);
 784
 785                 } else
 786                         syslog(LOG_WARNING, "can't create %s services",
 787                             nconf->nc_netid);
 788
 789                 if (registered == 0) {
 790                         registered = 1;
 791                         memset(&hints, 0, sizeof hints);
 792                         hints.ai_flags = AI_PASSIVE;
 793                         hints.ai_family = si.si_af;
 794                         hints.ai_socktype = si.si_socktype;
 795                         hints.ai_protocol = si.si_proto;
 796
 797                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 798                             &res)) != 0) {
 799                                 syslog(LOG_ERR, "cannot get local address: %s",
 800                                     gai_strerror(aicode));
 801                                 exit(1);
 802                         }
 803
 804                         servaddr.buf = malloc(res->ai_addrlen);
 805                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 806                         servaddr.len = res->ai_addrlen;
 807
 808                         rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
 809                         rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
 810                         rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
 811                         rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
 812
 813                         xcreated++;
 814                         freeaddrinfo(res);
 815                 }
 816         } /* end while */
 817 }
 818
 819 /*
 820  * Clear out sockets after a failure to bind one of them, so that the
 821  * cycle of socket creation/binding can start anew.
 822  */
 823 static void
 824 clearout_service(void)
 825 {
 826         int i;
 827
 828         for (i = 0; i < sock_fdcnt; i++) {
 829                 if (sock_fd[i] >= 0) {
 830                         shutdown(sock_fd[i], SHUT_RDWR);
 831                         close(sock_fd[i]);
 832                 }
 833         }
 834 }
 835
 836 void
 837 sigalarm_handler(void)
 838 {
 839
 840         grace_expired = 1;
 841 }
 842
 843 void
 844 usage()
 845 {
 846         errx(1, "usage: rpc.lockd [-d <debuglevel>]"
 847             " [-g <grace period>] [-h <bindip>] [-p <port>]");
 848 }
 849
 850 /*
 851  * init_nsm --
 852  *      Reset the NSM state-of-the-world and acquire its state.
 853  */
 854 void
 855 init_nsm(void)
 856 {
 857         enum clnt_stat ret;
 858         my_id id;
 859         sm_stat stat;
 860         char name[] = "NFS NLM";
 861
 862         /*
 863          * !!!
 864          * The my_id structure isn't used by the SM_UNMON_ALL call, as far
 865          * as I know.  Leave it empty for now.
 866          */
 867         memset(&id, 0, sizeof(id));
 868         id.my_name = name;
 869
 870         /*
 871          * !!!
 872          * The statd program must already be registered when lockd runs.
 873          */
 874         do {
 875                 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
 876                     (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
 877                 if (ret == RPC_PROGUNAVAIL) {
 878                         syslog(LOG_WARNING, "%lu %s", SM_PROG,
 879                             clnt_sperrno(ret));
 880                         sleep(2);
 881                         continue;
 882                 }
 883                 break;
 884         } while (0);
 885
 886         if (ret != 0) {
 887                 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
 888                 exit(1);
 889         }
 890
 891         nsm_state = stat.state;
 892
 893         /* setup constant data for SM_MON calls */
 894         mon_host.mon_id.my_id.my_name = localhost;
 895         mon_host.mon_id.my_id.my_prog = NLM_PROG;
 896         mon_host.mon_id.my_id.my_vers = NLM_SM;
 897         mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY;  /* bsdi addition */
 898 }
 899
 900 /*
 901  * Out of memory, fatal
 902  */
 903 void out_of_mem()
 904 {
 905         syslog(LOG_ERR, "out of memory");
 906         exit(2);
 907 }