usr.sbin/rpc.lockd/lockd.c

   1 /*      $NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $        */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-4-Clause
   5  *
   6  * Copyright (c) 1995
   7  *      A.R. Gordon (andrew.gordon@net-tel.co.uk).  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the FreeBSD project
  20  * 4. Neither the name of the author nor the names of any co-contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  */
  37
  38 #include <sys/cdefs.h>
  39 #ifndef lint
  40 __RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
  41 #endif
  42
  43 /*
  44  * main() function for NFS lock daemon.  Most of the code in this
  45  * file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
  46  *
  47  * The actual program logic is in the file lock_proc.c
  48  */
  49
  50 #include <sys/param.h>
  51 #include <sys/linker.h>
  52 #include <sys/module.h>
  53 #include <sys/socket.h>
  54 #include <sys/stat.h>
  55
  56 #include <netinet/in.h>
  57 #include <arpa/inet.h>
  58
  59 #include <err.h>
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include <errno.h>
  63 #include <syslog.h>
  64 #include <signal.h>
  65 #include <string.h>
  66 #include <unistd.h>
  67 #include <libutil.h>
  68 #include <netconfig.h>
  69 #include <netdb.h>
  70
  71 #include <rpc/rpc.h>
  72 #include <rpc/rpc_com.h>
  73 #include <rpcsvc/sm_inter.h>
  74
  75 #include "lockd.h"
  76 #include <rpcsvc/nlm_prot.h>
  77
  78 #define GETPORT_MAXTRY  20      /* Max tries to get a port # */
  79
  80 int             debug_level = 0;        /* 0 = no debugging syslog() calls */
  81 int             _rpcsvcdirty = 0;
  82
  83 int grace_expired;
  84 int nsm_state;
  85 int kernel_lockd;
  86 int kernel_lockd_client;
  87 pid_t client_pid;
  88 struct mon mon_host;
  89 char **hosts, *svcport_str = NULL;
  90 static int      mallocd_svcport = 0;
  91 static int      *sock_fd;
  92 static int      sock_fdcnt;
  93 static int      sock_fdpos;
  94 int nhosts = 0;
  95 int xcreated = 0;
  96 char **addrs;                   /* actually (netid, uaddr) pairs */
  97 int naddrs;                     /* count of how many (netid, uaddr) pairs */
  98 char localhost[] = "localhost";
  99
 100 static int      create_service(struct netconfig *nconf);
 101 static void     complete_service(struct netconfig *nconf, char *port_str);
 102 static void     clearout_service(void);
 103 static void     out_of_mem(void) __dead2;
 104 void    init_nsm(void);
 105 void    usage(void);
 106
 107 void sigalarm_handler(void);
 108
 109 /*
 110  * XXX move to some header file.
 111  */
 112 #define _PATH_RPCLOCKDSOCK      "/var/run/rpclockd.sock"
 113
 114 int
 115 main(int argc, char **argv)
 116 {
 117         int ch, i, s;
 118         void *nc_handle;
 119         char *endptr, **hosts_bak;
 120         struct sigaction sigalarm;
 121         int grace_period = 30;
 122         int foreground = 0;
 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:Fg: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 'F':
 140                         foreground = 1;
 141                         break;
 142                 case 'g':
 143                         grace_period = atoi(optarg);
 144                         if (!grace_period) {
 145                                 usage();
 146                                 /* NOTREACHED */
 147                         }
 148                         break;
 149                 case 'h':
 150                         ++nhosts;
 151                         hosts_bak = 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                         usage();
 179                         /* NOTREACHED */
 180                 }
 181         }
 182         if (geteuid()) { /* This command allowed only to root */
 183                 fprintf(stderr, "Sorry. You are not superuser\n");
 184                 exit(1);
 185         }
 186
 187         kernel_lockd = FALSE;
 188         kernel_lockd_client = FALSE;
 189         if (modfind("nfslockd") < 0) {
 190                 if (kldload("nfslockd") < 0) {
 191                         fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
 192                 } else {
 193                         kernel_lockd = TRUE;
 194                 }
 195         } else {
 196                 kernel_lockd = TRUE;
 197         }
 198         if (kernel_lockd) {
 199                 if (getosreldate() >= 800040)
 200                         kernel_lockd_client = TRUE;
 201         }
 202
 203         (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
 204         (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
 205         (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
 206         (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
 207
 208         /*
 209          * Check if IPv6 support is present.
 210          */
 211         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 212         if (s < 0)
 213                 have_v6 = 0;
 214         else
 215                 close(s);
 216
 217         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 218
 219         /*
 220          * If no hosts were specified, add a wildcard entry to bind to
 221          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 222          * list.
 223          */
 224         if (nhosts == 0) {
 225                 hosts = malloc(sizeof(char *));
 226                 if (hosts == NULL)
 227                         out_of_mem();
 228
 229                 hosts[0] = strdup("*");
 230                 nhosts = 1;
 231         } else {
 232                 if (have_v6) {
 233                         hosts_bak = realloc(hosts, (nhosts + 2) *
 234                             sizeof(char *));
 235                         if (hosts_bak == NULL) {
 236                                 for (i = 0; i < nhosts; i++)
 237                                         free(hosts[i]);
 238                                 free(hosts);
 239                                 out_of_mem();
 240                         } else
 241                                 hosts = hosts_bak;
 242
 243                         nhosts += 2;
 244                         hosts[nhosts - 2] = strdup("::1");
 245                 } else {
 246                         hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 247                         if (hosts_bak == NULL) {
 248                                 for (i = 0; i < nhosts; i++)
 249                                         free(hosts[i]);
 250
 251                                 free(hosts);
 252                                 out_of_mem();
 253                         } else {
 254                                 nhosts += 1;
 255                                 hosts = hosts_bak;
 256                         }
 257                 }
 258                 hosts[nhosts - 1] = strdup("127.0.0.1");
 259         }
 260
 261         if (kernel_lockd) {
 262                 if (!kernel_lockd_client) {
 263                         /*
 264                          * For the case where we have a kernel lockd but it
 265                          * doesn't provide client locking, we run a cut-down
 266                          * RPC service on a local-domain socket. The kernel's
 267                          * RPC server will pass what it can't handle (mainly
 268                          * client replies) down to us.
 269                          */
 270                         struct sockaddr_un sun;
 271                         int fd, oldmask;
 272                         SVCXPRT *xprt;
 273
 274                         memset(&sun, 0, sizeof sun);
 275                         sun.sun_family = AF_LOCAL;
 276                         unlink(_PATH_RPCLOCKDSOCK);
 277                         strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
 278                         sun.sun_len = SUN_LEN(&sun);
 279                         fd = socket(AF_LOCAL, SOCK_STREAM, 0);
 280                         if (!fd) {
 281                                 err(1, "Can't create local lockd socket");
 282                         }
 283                         oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
 284                         if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
 285                                 err(1, "Can't bind local lockd socket");
 286                         }
 287                         umask(oldmask);
 288                         if (listen(fd, SOMAXCONN) < 0) {
 289                                 err(1, "Can't listen on local lockd socket");
 290                         }
 291                         xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 292                         if (!xprt) {
 293                                 err(1, "Can't create transport for local lockd socket");
 294                         }
 295                         if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
 296                                 err(1, "Can't register service for local lockd socket");
 297                         }
 298                 }
 299
 300                 /*
 301                  * We need to look up the addresses so that we can
 302                  * hand uaddrs (ascii encoded address+port strings) to
 303                  * the kernel.
 304                  */
 305                 nc_handle = setnetconfig();
 306                 while ((nconf = getnetconfig(nc_handle))) {
 307                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 308                         if (nconf->nc_flag & NC_VISIBLE) {
 309                                 /* Skip if there's no IPv6 support */
 310                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 311                                         /* DO NOTHING */
 312                                 } else {
 313                                         create_service(nconf);
 314                                 }
 315                         }
 316                 }
 317                 endnetconfig(nc_handle);
 318         } else {
 319                 attempt_cnt = 1;
 320                 sock_fdcnt = 0;
 321                 sock_fd = NULL;
 322                 port_list = NULL;
 323                 port_len = 0;
 324                 nc_handle = setnetconfig();
 325                 while ((nconf = getnetconfig(nc_handle))) {
 326                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 327                         if (nconf->nc_flag & NC_VISIBLE) {
 328                                 /* Skip if there's no IPv6 support */
 329                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 330                                         /* DO NOTHING */
 331                                 } else {
 332                                         ret = create_service(nconf);
 333                                         if (ret == 1)
 334                                                 /* Ignore this call */
 335                                                 continue;
 336                                         if (ret < 0) {
 337                                                 /*
 338                                                  * Failed to bind port, so close
 339                                                  * off all sockets created and
 340                                                  * try again if the port# was
 341                                                  * dynamically assigned via
 342                                                  * bind(2).
 343                                                  */
 344                                                 clearout_service();
 345                                                 if (mallocd_svcport != 0 &&
 346                                                     attempt_cnt <
 347                                                     GETPORT_MAXTRY) {
 348                                                         free(svcport_str);
 349                                                         svcport_str = NULL;
 350                                                         mallocd_svcport = 0;
 351                                                 } else {
 352                                                         errno = EADDRINUSE;
 353                                                         syslog(LOG_ERR,
 354                                                          "bindresvport_sa: %m");
 355                                                         exit(1);
 356                                                 }
 357
 358                                                 /*
 359                                                  * Start over at the first
 360                                                  * service.
 361                                                  */
 362                                                 free(sock_fd);
 363                                                 sock_fdcnt = 0;
 364                                                 sock_fd = NULL;
 365                                                 nc_handle = setnetconfig();
 366                                                 attempt_cnt++;
 367                                         } else if (mallocd_svcport != 0 &&
 368                                             attempt_cnt == GETPORT_MAXTRY) {
 369                                                 /*
 370                                                  * For the last attempt, allow
 371                                                  * different port #s for each
 372                                                  * nconf by saving the
 373                                                  * svcport_str and setting it
 374                                                  * back to NULL.
 375                                                  */
 376                                                 port_list = realloc(port_list,
 377                                                     (port_len + 1) *
 378                                                     sizeof(char *));
 379                                                 if (port_list == NULL)
 380                                                         out_of_mem();
 381                                                 port_list[port_len++] =
 382                                                     svcport_str;
 383                                                 svcport_str = NULL;
 384                                                 mallocd_svcport = 0;
 385                                         }
 386                                 }
 387                         }
 388                 }
 389
 390                 /*
 391                  * Successfully bound the ports, so call complete_service() to
 392                  * do the rest of the setup on the service(s).
 393                  */
 394                 sock_fdpos = 0;
 395                 port_pos = 0;
 396                 nc_handle = setnetconfig();
 397                 while ((nconf = getnetconfig(nc_handle))) {
 398                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 399                         if (nconf->nc_flag & NC_VISIBLE) {
 400                                 /* Skip if there's no IPv6 support */
 401                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 402                                         /* DO NOTHING */
 403                                 } else if (port_list != NULL) {
 404                                         if (port_pos >= port_len) {
 405                                                 syslog(LOG_ERR,
 406                                                     "too many port#s");
 407                                                 exit(1);
 408                                         }
 409                                         complete_service(nconf,
 410                                             port_list[port_pos++]);
 411                                 } else
 412                                         complete_service(nconf, svcport_str);
 413                         }
 414                 }
 415                 endnetconfig(nc_handle);
 416                 free(sock_fd);
 417                 if (port_list != NULL) {
 418                         for (port_pos = 0; port_pos < port_len; port_pos++)
 419                                 free(port_list[port_pos]);
 420                         free(port_list);
 421                 }
 422         }
 423
 424         /*
 425          * Note that it is NOT sensible to run this program from inetd - the
 426          * protocol assumes that it will run immediately at boot time.
 427          */
 428         if ((foreground == 0) && daemon(0, 0)) {
 429                 err(1, "cannot fork");
 430                 /* NOTREACHED */
 431         }
 432
 433         openlog("rpc.lockd", 0, LOG_DAEMON);
 434         if (debug_level)
 435                 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
 436         else
 437                 syslog(LOG_INFO, "Starting");
 438
 439         sigalarm.sa_handler = (sig_t) sigalarm_handler;
 440         sigemptyset(&sigalarm.sa_mask);
 441         sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
 442         sigalarm.sa_flags |= SA_RESTART;
 443         if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
 444                 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
 445                     strerror(errno));
 446                 exit(1);
 447         }
 448
 449         if (kernel_lockd) {
 450                 if (!kernel_lockd_client) {
 451                         init_nsm();
 452                         client_pid = client_request();
 453
 454                         /*
 455                          * Create a child process to enter the kernel and then
 456                          * wait for RPCs on our local domain socket.
 457                          */
 458                         if (!fork())
 459                                 nlm_syscall(debug_level, grace_period,
 460                                     naddrs, addrs);
 461                         else
 462                                 svc_run();
 463                 } else {
 464                         /*
 465                          * The kernel lockd implementation provides
 466                          * both client and server so we don't need to
 467                          * do anything else.
 468                          */
 469                         nlm_syscall(debug_level, grace_period, naddrs, addrs);
 470                 }
 471         } else {
 472                 grace_expired = 0;
 473                 alarm(grace_period);
 474
 475                 init_nsm();
 476
 477                 client_pid = client_request();
 478
 479                 svc_run();              /* Should never return */
 480         }
 481         exit(1);
 482 }
 483
 484 /*
 485  * This routine creates and binds sockets on the appropriate
 486  * addresses if lockd for user NLM, or perform a lookup of
 487  * addresses for the kernel to create transports.
 488  *
 489  * It gets called one time for each transport.
 490  *
 491  * It returns 0 upon success, 1 for ignore the call and -1 to indicate
 492  * bind failed with EADDRINUSE.
 493  *
 494  * Any file descriptors that have been created are stored in sock_fd and
 495  * the total count of them is maintained in sock_fdcnt.
 496  */
 497 static int
 498 create_service(struct netconfig *nconf)
 499 {
 500         struct addrinfo hints, *res = NULL;
 501         struct sockaddr_in *sin;
 502         struct sockaddr_in6 *sin6;
 503         struct __rpc_sockinfo si;
 504         int aicode;
 505         int fd;
 506         int nhostsbak;
 507         int r;
 508         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 509         int mallocd_res;
 510
 511         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 512             (nconf->nc_semantics != NC_TPI_COTS) &&
 513             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 514                 return (1);     /* not my type */
 515
 516         /*
 517          * XXX - using RPC library internal functions.
 518          */
 519         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 520                 syslog(LOG_ERR, "cannot get information for %s",
 521                     nconf->nc_netid);
 522                 return (1);
 523         }
 524
 525         /* Get rpc.statd's address on this transport */
 526         memset(&hints, 0, sizeof hints);
 527         hints.ai_family = si.si_af;
 528         hints.ai_socktype = si.si_socktype;
 529         hints.ai_protocol = si.si_proto;
 530
 531         /*
 532          * Bind to specific IPs if asked to
 533          */
 534         nhostsbak = nhosts;
 535         while (nhostsbak > 0) {
 536                 --nhostsbak;
 537                 mallocd_res = 0;
 538                 hints.ai_flags = AI_PASSIVE;
 539
 540                 if (!kernel_lockd) {
 541                         sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
 542                         if (sock_fd == NULL)
 543                                 out_of_mem();
 544                         sock_fd[sock_fdcnt++] = -1;     /* Set invalid for now. */
 545
 546                         /*
 547                         * XXX - using RPC library internal functions.
 548                         */
 549                         if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 550                                 syslog(LOG_ERR, "cannot create socket for %s",
 551                                         nconf->nc_netid);
 552                                 continue;
 553                         }
 554                 }
 555
 556                 switch (hints.ai_family) {
 557                         case AF_INET:
 558                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 559                                     host_addr) == 1) {
 560                                         hints.ai_flags |= AI_NUMERICHOST;
 561                                 } else {
 562                                         /*
 563                                          * Skip if we have an AF_INET6 address.
 564                                          */
 565                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 566                                             host_addr) == 1) {
 567                                                 if (!kernel_lockd)
 568                                                         close(fd);
 569                                                 continue;
 570                                         }
 571                                 }
 572                                 break;
 573                         case AF_INET6:
 574                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 575                                     host_addr) == 1) {
 576                                         hints.ai_flags |= AI_NUMERICHOST;
 577                                 } else {
 578                                         /*
 579                                          * Skip if we have an AF_INET address.
 580                                          */
 581                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 582                                             host_addr) == 1) {
 583                                                 if (!kernel_lockd)
 584                                                         close(fd);
 585                                                 continue;
 586                                         }
 587                                 }
 588                                 break;
 589                         default:
 590                                 break;
 591                 }
 592
 593                 /*
 594                  * If no hosts were specified, just bind to INADDR_ANY
 595                  */
 596                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 597                         if (svcport_str == NULL) {
 598                                 if ((res = malloc(sizeof(struct addrinfo))) == NULL)
 599                                         out_of_mem();
 600                                 mallocd_res = 1;
 601                                 res->ai_flags = hints.ai_flags;
 602                                 res->ai_family = hints.ai_family;
 603                                 res->ai_protocol = hints.ai_protocol;
 604                                 switch (res->ai_family) {
 605                                         case AF_INET:
 606                                                 sin = malloc(sizeof(struct sockaddr_in));
 607                                                 if (sin == NULL)
 608                                                         out_of_mem();
 609                                                 sin->sin_family = AF_INET;
 610                                                 sin->sin_port = htons(0);
 611                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 612                                                 res->ai_addr = (struct sockaddr*) sin;
 613                                                 res->ai_addrlen = (socklen_t)
 614                                                     sizeof(struct sockaddr_in);
 615                                                 break;
 616                                         case AF_INET6:
 617                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 618                                                 if (sin6 == NULL)
 619                                                         out_of_mem();
 620                                                 sin6->sin6_family = AF_INET6;
 621                                                 sin6->sin6_port = htons(0);
 622                                                 sin6->sin6_addr = in6addr_any;
 623                                                 res->ai_addr = (struct sockaddr*) sin6;
 624                                                 res->ai_addrlen = (socklen_t)
 625                                                     sizeof(struct sockaddr_in6);
 626                                                 break;
 627                                         default:
 628                                                 syslog(LOG_ERR,
 629                                                     "bad address family %d",
 630                                                     res->ai_family);
 631                                                 exit(1);
 632                                 }
 633                         } else {
 634                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 635                                     &hints, &res)) != 0) {
 636                                         syslog(LOG_ERR,
 637                                             "cannot get local address for %s: %s",
 638                                             nconf->nc_netid,
 639                                             gai_strerror(aicode));
 640                                         if (!kernel_lockd)
 641                                                 close(fd);
 642                                         continue;
 643                                 }
 644                         }
 645                 } else {
 646                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 647                             &hints, &res)) != 0) {
 648                                 syslog(LOG_ERR,
 649                                     "cannot get local address for %s: %s",
 650                                     nconf->nc_netid, gai_strerror(aicode));
 651                                 if (!kernel_lockd)
 652                                         close(fd);
 653                                 continue;
 654                         }
 655                 }
 656
 657                 if (kernel_lockd) {
 658                         struct netbuf servaddr;
 659                         char *uaddr;
 660
 661                         /*
 662                          * Look up addresses for the kernel to create transports for.
 663                          */
 664                         servaddr.len = servaddr.maxlen = res->ai_addrlen;
 665                         servaddr.buf = res->ai_addr;
 666                         uaddr = taddr2uaddr(nconf, &servaddr);
 667
 668                         addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
 669                         if (!addrs)
 670                                 out_of_mem();
 671                         addrs[2 * naddrs] = strdup(nconf->nc_netid);
 672                         addrs[2 * naddrs + 1] = uaddr;
 673                         naddrs++;
 674                 } else {
 675                         /* Store the fd. */
 676                         sock_fd[sock_fdcnt - 1] = fd;
 677
 678                         /* Now, attempt the bind. */
 679                         r = bindresvport_sa(fd, res->ai_addr);
 680                         if (r != 0) {
 681                                 if (errno == EADDRINUSE && mallocd_svcport != 0) {
 682                                         if (mallocd_res != 0) {
 683                                                 free(res->ai_addr);
 684                                                 free(res);
 685                                         } else
 686                                                 freeaddrinfo(res);
 687                                         return (-1);
 688                                 }
 689                                 syslog(LOG_ERR, "bindresvport_sa: %m");
 690                                 exit(1);
 691                         }
 692
 693                         if (svcport_str == NULL) {
 694                                 svcport_str = malloc(NI_MAXSERV * sizeof(char));
 695                                 if (svcport_str == NULL)
 696                                         out_of_mem();
 697                                 mallocd_svcport = 1;
 698
 699                                 if (getnameinfo(res->ai_addr,
 700                                 res->ai_addr->sa_len, NULL, NI_MAXHOST,
 701                                 svcport_str, NI_MAXSERV * sizeof(char),
 702                                 NI_NUMERICHOST | NI_NUMERICSERV))
 703                                         errx(1, "Cannot get port number");
 704                         }
 705                 }
 706
 707                 if (mallocd_res != 0) {
 708                         free(res->ai_addr);
 709                         free(res);
 710                 } else
 711                         freeaddrinfo(res);
 712                 res = NULL;
 713         }
 714         return (0);
 715 }
 716
 717 /*
 718  * Called after all the create_service() calls have succeeded, to complete
 719  * the setup and registration.
 720  */
 721 static void
 722 complete_service(struct netconfig *nconf, char *port_str)
 723 {
 724         struct addrinfo hints, *res = NULL;
 725         struct __rpc_sockinfo si;
 726         struct netbuf servaddr;
 727         SVCXPRT *transp = NULL;
 728         int aicode, fd, nhostsbak;
 729         int registered = 0;
 730
 731         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 732             (nconf->nc_semantics != NC_TPI_COTS) &&
 733             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 734                 return; /* not my type */
 735
 736         /*
 737          * XXX - using RPC library internal functions.
 738          */
 739         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 740                 syslog(LOG_ERR, "cannot get information for %s",
 741                     nconf->nc_netid);
 742                 return;
 743         }
 744
 745         nhostsbak = nhosts;
 746         while (nhostsbak > 0) {
 747                 --nhostsbak;
 748                 if (sock_fdpos >= sock_fdcnt) {
 749                         /* Should never happen. */
 750                         syslog(LOG_ERR, "Ran out of socket fd's");
 751                         return;
 752                 }
 753                 fd = sock_fd[sock_fdpos++];
 754                 if (fd < 0)
 755                         continue;
 756
 757                 if (nconf->nc_semantics != NC_TPI_CLTS)
 758                     listen(fd, SOMAXCONN);
 759
 760                 transp = svc_tli_create(fd, nconf, NULL,
 761                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 762
 763                 if (transp != (SVCXPRT *) NULL) {
 764                         if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
 765                             NULL))
 766                                 syslog(LOG_ERR,
 767                                     "can't register %s NLM_PROG, NLM_SM service",
 768                                     nconf->nc_netid);
 769
 770                         if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
 771                             NULL))
 772                                 syslog(LOG_ERR,
 773                                     "can't register %s NLM_PROG, NLM_VERS service",
 774                                     nconf->nc_netid);
 775
 776                         if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
 777                             NULL))
 778                                 syslog(LOG_ERR,
 779                                     "can't register %s NLM_PROG, NLM_VERSX service",
 780                                     nconf->nc_netid);
 781
 782                         if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
 783                             NULL))
 784                                 syslog(LOG_ERR,
 785                                     "can't register %s NLM_PROG, NLM_VERS4 service",
 786                                     nconf->nc_netid);
 787
 788                 } else
 789                         syslog(LOG_WARNING, "can't create %s services",
 790                             nconf->nc_netid);
 791
 792                 if (registered == 0) {
 793                         registered = 1;
 794                         memset(&hints, 0, sizeof hints);
 795                         hints.ai_flags = AI_PASSIVE;
 796                         hints.ai_family = si.si_af;
 797                         hints.ai_socktype = si.si_socktype;
 798                         hints.ai_protocol = si.si_proto;
 799
 800                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 801                             &res)) != 0) {
 802                                 syslog(LOG_ERR, "cannot get local address: %s",
 803                                     gai_strerror(aicode));
 804                                 exit(1);
 805                         }
 806
 807                         servaddr.buf = malloc(res->ai_addrlen);
 808                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 809                         servaddr.len = res->ai_addrlen;
 810
 811                         rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
 812                         rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
 813                         rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
 814                         rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
 815
 816                         xcreated++;
 817                         freeaddrinfo(res);
 818                 }
 819         } /* end while */
 820 }
 821
 822 /*
 823  * Clear out sockets after a failure to bind one of them, so that the
 824  * cycle of socket creation/binding can start anew.
 825  */
 826 static void
 827 clearout_service(void)
 828 {
 829         int i;
 830
 831         for (i = 0; i < sock_fdcnt; i++) {
 832                 if (sock_fd[i] >= 0) {
 833                         shutdown(sock_fd[i], SHUT_RDWR);
 834                         close(sock_fd[i]);
 835                 }
 836         }
 837 }
 838
 839 void
 840 sigalarm_handler(void)
 841 {
 842
 843         grace_expired = 1;
 844 }
 845
 846 void
 847 usage(void)
 848 {
 849         errx(1, "usage: rpc.lockd [-d <debuglevel>]"
 850             " [-F] [-g <grace period>] [-h <bindip>] [-p <port>]");
 851 }
 852
 853 /*
 854  * init_nsm --
 855  *      Reset the NSM state-of-the-world and acquire its state.
 856  */
 857 void
 858 init_nsm(void)
 859 {
 860         enum clnt_stat ret;
 861         my_id id;
 862         sm_stat stat;
 863         char name[] = "NFS NLM";
 864
 865         /*
 866          * !!!
 867          * The my_id structure isn't used by the SM_UNMON_ALL call, as far
 868          * as I know.  Leave it empty for now.
 869          */
 870         memset(&id, 0, sizeof(id));
 871         id.my_name = name;
 872
 873         /*
 874          * !!!
 875          * The statd program must already be registered when lockd runs.
 876          */
 877         do {
 878                 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
 879                     (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
 880                 if (ret == RPC_PROGUNAVAIL) {
 881                         syslog(LOG_WARNING, "%lu %s", SM_PROG,
 882                             clnt_sperrno(ret));
 883                         sleep(2);
 884                         continue;
 885                 }
 886                 break;
 887         } while (0);
 888
 889         if (ret != 0) {
 890                 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
 891                 exit(1);
 892         }
 893
 894         nsm_state = stat.state;
 895
 896         /* setup constant data for SM_MON calls */
 897         mon_host.mon_id.my_id.my_name = localhost;
 898         mon_host.mon_id.my_id.my_prog = NLM_PROG;
 899         mon_host.mon_id.my_id.my_vers = NLM_SM;
 900         mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY;  /* bsdi addition */
 901 }
 902
 903 /*
 904  * Out of memory, fatal
 905  */
 906 void
 907 out_of_mem(void)
 908 {
 909         syslog(LOG_ERR, "out of memory");
 910         exit(2);
 911 }