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         int foreground = 0;
 124         struct netconfig *nconf;
 125         int have_v6 = 1;
 126         int maxrec = RPC_MAXDATASIZE;
 127         in_port_t svcport = 0;
 128         int attempt_cnt, port_len, port_pos, ret;
 129         char **port_list;
 130
 131         while ((ch = getopt(argc, argv, "d:Fg:h:p:")) != (-1)) {
 132                 switch (ch) {
 133                 case 'd':
 134                         debug_level = atoi(optarg);
 135                         if (!debug_level) {
 136                                 usage();
 137                                 /* NOTREACHED */
 138                         }
 139                         break;
 140                 case 'F':
 141                         foreground = 1;
 142                         break;
 143                 case 'g':
 144                         grace_period = atoi(optarg);
 145                         if (!grace_period) {
 146                                 usage();
 147                                 /* NOTREACHED */
 148                         }
 149                         break;
 150                 case 'h':
 151                         ++nhosts;
 152                         hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 153                         if (hosts_bak == NULL) {
 154                                 if (hosts != NULL) {
 155                                         for (i = 0; i < nhosts; i++)
 156                                                 free(hosts[i]);
 157                                         free(hosts);
 158                                         out_of_mem();
 159                                 }
 160                         }
 161                         hosts = hosts_bak;
 162                         hosts[nhosts - 1] = strdup(optarg);
 163                         if (hosts[nhosts - 1] == NULL) {
 164                                 for (i = 0; i < (nhosts - 1); i++)
 165                                         free(hosts[i]);
 166                                 free(hosts);
 167                                 out_of_mem();
 168                         }
 169                         break;
 170                 case 'p':
 171                         endptr = NULL;
 172                         svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 173                         if (endptr == NULL || *endptr != '\0' ||
 174                             svcport == 0 || svcport >= IPPORT_MAX)
 175                                 usage();
 176                         svcport_str = strdup(optarg);
 177                         break;
 178                 default:
 179                         usage();
 180                         /* NOTREACHED */
 181                 }
 182         }
 183         if (geteuid()) { /* This command allowed only to root */
 184                 fprintf(stderr, "Sorry. You are not superuser\n");
 185                 exit(1);
 186         }
 187
 188         kernel_lockd = FALSE;
 189         kernel_lockd_client = FALSE;
 190         if (modfind("nfslockd") < 0) {
 191                 if (kldload("nfslockd") < 0) {
 192                         fprintf(stderr, "Can't find or load kernel support for rpc.lockd - using non-kernel implementation\n");
 193                 } else {
 194                         kernel_lockd = TRUE;
 195                 }
 196         } else {
 197                 kernel_lockd = TRUE;
 198         }
 199         if (kernel_lockd) {
 200                 if (getosreldate() >= 800040)
 201                         kernel_lockd_client = TRUE;
 202         }
 203
 204         (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
 205         (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
 206         (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
 207         (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
 208
 209         /*
 210          * Check if IPv6 support is present.
 211          */
 212         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 213         if (s < 0)
 214                 have_v6 = 0;
 215         else
 216                 close(s);
 217
 218         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 219
 220         /*
 221          * If no hosts were specified, add a wildcard entry to bind to
 222          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 223          * list.
 224          */
 225         if (nhosts == 0) {
 226                 hosts = malloc(sizeof(char *));
 227                 if (hosts == NULL)
 228                         out_of_mem();
 229
 230                 hosts[0] = strdup("*");
 231                 nhosts = 1;
 232         } else {
 233                 if (have_v6) {
 234                         hosts_bak = realloc(hosts, (nhosts + 2) *
 235                             sizeof(char *));
 236                         if (hosts_bak == NULL) {
 237                                 for (i = 0; i < nhosts; i++)
 238                                         free(hosts[i]);
 239                                 free(hosts);
 240                                 out_of_mem();
 241                         } else
 242                                 hosts = hosts_bak;
 243
 244                         nhosts += 2;
 245                         hosts[nhosts - 2] = strdup("::1");
 246                 } else {
 247                         hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 248                         if (hosts_bak == NULL) {
 249                                 for (i = 0; i < nhosts; i++)
 250                                         free(hosts[i]);
 251
 252                                 free(hosts);
 253                                 out_of_mem();
 254                         } else {
 255                                 nhosts += 1;
 256                                 hosts = hosts_bak;
 257                         }
 258                 }
 259                 hosts[nhosts - 1] = strdup("127.0.0.1");
 260         }
 261
 262         if (kernel_lockd) {
 263                 if (!kernel_lockd_client) {
 264                         /*
 265                          * For the case where we have a kernel lockd but it
 266                          * doesn't provide client locking, we run a cut-down
 267                          * RPC service on a local-domain socket. The kernel's
 268                          * RPC server will pass what it can't handle (mainly
 269                          * client replies) down to us.
 270                          */
 271                         struct sockaddr_un sun;
 272                         int fd, oldmask;
 273                         SVCXPRT *xprt;
 274
 275                         memset(&sun, 0, sizeof sun);
 276                         sun.sun_family = AF_LOCAL;
 277                         unlink(_PATH_RPCLOCKDSOCK);
 278                         strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
 279                         sun.sun_len = SUN_LEN(&sun);
 280                         fd = socket(AF_LOCAL, SOCK_STREAM, 0);
 281                         if (!fd) {
 282                                 err(1, "Can't create local lockd socket");
 283                         }
 284                         oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
 285                         if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
 286                                 err(1, "Can't bind local lockd socket");
 287                         }
 288                         umask(oldmask);
 289                         if (listen(fd, SOMAXCONN) < 0) {
 290                                 err(1, "Can't listen on local lockd socket");
 291                         }
 292                         xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 293                         if (!xprt) {
 294                                 err(1, "Can't create transport for local lockd socket");
 295                         }
 296                         if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
 297                                 err(1, "Can't register service for local lockd socket");
 298                         }
 299                 }
 300
 301                 /*
 302                  * We need to look up the addresses so that we can
 303                  * hand uaddrs (ascii encoded address+port strings) to
 304                  * the kernel.
 305                  */
 306                 nc_handle = setnetconfig();
 307                 while ((nconf = getnetconfig(nc_handle))) {
 308                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 309                         if (nconf->nc_flag & NC_VISIBLE) {
 310                                 /* Skip if there's no IPv6 support */
 311                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 312                                         /* DO NOTHING */
 313                                 } else {
 314                                         create_service(nconf);
 315                                 }
 316                         }
 317                 }
 318                 endnetconfig(nc_handle);
 319         } else {
 320                 attempt_cnt = 1;
 321                 sock_fdcnt = 0;
 322                 sock_fd = NULL;
 323                 port_list = NULL;
 324                 port_len = 0;
 325                 nc_handle = setnetconfig();
 326                 while ((nconf = getnetconfig(nc_handle))) {
 327                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 328                         if (nconf->nc_flag & NC_VISIBLE) {
 329                                 /* Skip if there's no IPv6 support */
 330                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 331                                         /* DO NOTHING */
 332                                 } else {
 333                                         ret = create_service(nconf);
 334                                         if (ret == 1)
 335                                                 /* Ignore this call */
 336                                                 continue;
 337                                         if (ret < 0) {
 338                                                 /*
 339                                                  * Failed to bind port, so close
 340                                                  * off all sockets created and
 341                                                  * try again if the port# was
 342                                                  * dynamically assigned via
 343                                                  * bind(2).
 344                                                  */
 345                                                 clearout_service();
 346                                                 if (mallocd_svcport != 0 &&
 347                                                     attempt_cnt <
 348                                                     GETPORT_MAXTRY) {
 349                                                         free(svcport_str);
 350                                                         svcport_str = NULL;
 351                                                         mallocd_svcport = 0;
 352                                                 } else {
 353                                                         errno = EADDRINUSE;
 354                                                         syslog(LOG_ERR,
 355                                                          "bindresvport_sa: %m");
 356                                                         exit(1);
 357                                                 }
 358
 359                                                 /*
 360                                                  * Start over at the first
 361                                                  * service.
 362                                                  */
 363                                                 free(sock_fd);
 364                                                 sock_fdcnt = 0;
 365                                                 sock_fd = NULL;
 366                                                 nc_handle = setnetconfig();
 367                                                 attempt_cnt++;
 368                                         } else if (mallocd_svcport != 0 &&
 369                                             attempt_cnt == GETPORT_MAXTRY) {
 370                                                 /*
 371                                                  * For the last attempt, allow
 372                                                  * different port #s for each
 373                                                  * nconf by saving the
 374                                                  * svcport_str and setting it
 375                                                  * back to NULL.
 376                                                  */
 377                                                 port_list = realloc(port_list,
 378                                                     (port_len + 1) *
 379                                                     sizeof(char *));
 380                                                 if (port_list == NULL)
 381                                                         out_of_mem();
 382                                                 port_list[port_len++] =
 383                                                     svcport_str;
 384                                                 svcport_str = NULL;
 385                                                 mallocd_svcport = 0;
 386                                         }
 387                                 }
 388                         }
 389                 }
 390
 391                 /*
 392                  * Successfully bound the ports, so call complete_service() to
 393                  * do the rest of the setup on the service(s).
 394                  */
 395                 sock_fdpos = 0;
 396                 port_pos = 0;
 397                 nc_handle = setnetconfig();
 398                 while ((nconf = getnetconfig(nc_handle))) {
 399                         /* We want to listen only on udp6, tcp6, udp, tcp transports */
 400                         if (nconf->nc_flag & NC_VISIBLE) {
 401                                 /* Skip if there's no IPv6 support */
 402                                 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
 403                                         /* DO NOTHING */
 404                                 } else if (port_list != NULL) {
 405                                         if (port_pos >= port_len) {
 406                                                 syslog(LOG_ERR,
 407                                                     "too many port#s");
 408                                                 exit(1);
 409                                         }
 410                                         complete_service(nconf,
 411                                             port_list[port_pos++]);
 412                                 } else
 413                                         complete_service(nconf, svcport_str);
 414                         }
 415                 }
 416                 endnetconfig(nc_handle);
 417                 free(sock_fd);
 418                 if (port_list != NULL) {
 419                         for (port_pos = 0; port_pos < port_len; port_pos++)
 420                                 free(port_list[port_pos]);
 421                         free(port_list);
 422                 }
 423         }
 424
 425         /*
 426          * Note that it is NOT sensible to run this program from inetd - the
 427          * protocol assumes that it will run immediately at boot time.
 428          */
 429         if ((foreground == 0) && daemon(0, debug_level > 0)) {
 430                 err(1, "cannot fork");
 431                 /* NOTREACHED */
 432         }
 433
 434         openlog("rpc.lockd", 0, LOG_DAEMON);
 435         if (debug_level)
 436                 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
 437         else
 438                 syslog(LOG_INFO, "Starting");
 439
 440         sigalarm.sa_handler = (sig_t) sigalarm_handler;
 441         sigemptyset(&sigalarm.sa_mask);
 442         sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
 443         sigalarm.sa_flags |= SA_RESTART;
 444         if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
 445                 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
 446                     strerror(errno));
 447                 exit(1);
 448         }
 449
 450         if (kernel_lockd) {
 451                 if (!kernel_lockd_client) {
 452                         init_nsm();
 453                         client_pid = client_request();
 454
 455                         /*
 456                          * Create a child process to enter the kernel and then
 457                          * wait for RPCs on our local domain socket.
 458                          */
 459                         if (!fork())
 460                                 nlm_syscall(debug_level, grace_period,
 461                                     naddrs, addrs);
 462                         else
 463                                 svc_run();
 464                 } else {
 465                         /*
 466                          * The kernel lockd implementation provides
 467                          * both client and server so we don't need to
 468                          * do anything else.
 469                          */
 470                         nlm_syscall(debug_level, grace_period, naddrs, addrs);
 471                 }
 472         } else {
 473                 grace_expired = 0;
 474                 alarm(grace_period);
 475
 476                 init_nsm();
 477
 478                 client_pid = client_request();
 479
 480                 svc_run();              /* Should never return */
 481         }
 482         exit(1);
 483 }
 484
 485 /*
 486  * This routine creates and binds sockets on the appropriate
 487  * addresses if lockd for user NLM, or perform a lookup of
 488  * addresses for the kernel to create transports.
 489  *
 490  * It gets called one time for each transport.
 491  *
 492  * It returns 0 upon success, 1 for ingore the call and -1 to indicate
 493  * bind failed with EADDRINUSE.
 494  *
 495  * Any file descriptors that have been created are stored in sock_fd and
 496  * the total count of them is maintained in sock_fdcnt.
 497  */
 498 static int
 499 create_service(struct netconfig *nconf)
 500 {
 501         struct addrinfo hints, *res = NULL;
 502         struct sockaddr_in *sin;
 503         struct sockaddr_in6 *sin6;
 504         struct __rpc_sockinfo si;
 505         int aicode;
 506         int fd;
 507         int nhostsbak;
 508         int r;
 509         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 510         int mallocd_res;
 511
 512         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 513             (nconf->nc_semantics != NC_TPI_COTS) &&
 514             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 515                 return (1);     /* not my type */
 516
 517         /*
 518          * XXX - using RPC library internal functions.
 519          */
 520         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 521                 syslog(LOG_ERR, "cannot get information for %s",
 522                     nconf->nc_netid);
 523                 return (1);
 524         }
 525
 526         /* Get rpc.statd's address on this transport */
 527         memset(&hints, 0, sizeof hints);
 528         hints.ai_family = si.si_af;
 529         hints.ai_socktype = si.si_socktype;
 530         hints.ai_protocol = si.si_proto;
 531
 532         /*
 533          * Bind to specific IPs if asked to
 534          */
 535         nhostsbak = nhosts;
 536         while (nhostsbak > 0) {
 537                 --nhostsbak;
 538                 mallocd_res = 0;
 539                 hints.ai_flags = AI_PASSIVE;
 540
 541                 if (!kernel_lockd) {
 542                         sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
 543                         if (sock_fd == NULL)
 544                                 out_of_mem();
 545                         sock_fd[sock_fdcnt++] = -1;     /* Set invalid for now. */
 546
 547                         /*
 548                         * XXX - using RPC library internal functions.
 549                         */
 550                         if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 551                                 syslog(LOG_ERR, "cannot create socket for %s",
 552                                         nconf->nc_netid);
 553                                 continue;
 554                         }
 555                 }
 556
 557                 switch (hints.ai_family) {
 558                         case AF_INET:
 559                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 560                                     host_addr) == 1) {
 561                                         hints.ai_flags |= AI_NUMERICHOST;
 562                                 } else {
 563                                         /*
 564                                          * Skip if we have an AF_INET6 address.
 565                                          */
 566                                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 567                                             host_addr) == 1) {
 568                                                 if (!kernel_lockd)
 569                                                         close(fd);
 570                                                 continue;
 571                                         }
 572                                 }
 573                                 break;
 574                         case AF_INET6:
 575                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 576                                     host_addr) == 1) {
 577                                         hints.ai_flags |= AI_NUMERICHOST;
 578                                 } else {
 579                                         /*
 580                                          * Skip if we have an AF_INET address.
 581                                          */
 582                                         if (inet_pton(AF_INET, hosts[nhostsbak],
 583                                             host_addr) == 1) {
 584                                                 if (!kernel_lockd)
 585                                                         close(fd);
 586                                                 continue;
 587                                         }
 588                                 }
 589                                 break;
 590                         default:
 591                                 break;
 592                 }
 593
 594                 /*
 595                  * If no hosts were specified, just bind to INADDR_ANY
 596                  */
 597                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 598                         if (svcport_str == NULL) {
 599                                 if ((res = malloc(sizeof(struct addrinfo))) == NULL)
 600                                         out_of_mem();
 601                                 mallocd_res = 1;
 602                                 res->ai_flags = hints.ai_flags;
 603                                 res->ai_family = hints.ai_family;
 604                                 res->ai_protocol = hints.ai_protocol;
 605                                 switch (res->ai_family) {
 606                                         case AF_INET:
 607                                                 sin = malloc(sizeof(struct sockaddr_in));
 608                                                 if (sin == NULL)
 609                                                         out_of_mem();
 610                                                 sin->sin_family = AF_INET;
 611                                                 sin->sin_port = htons(0);
 612                                                 sin->sin_addr.s_addr = htonl(INADDR_ANY);
 613                                                 res->ai_addr = (struct sockaddr*) sin;
 614                                                 res->ai_addrlen = (socklen_t)
 615                                                     sizeof(struct sockaddr_in);
 616                                                 break;
 617                                         case AF_INET6:
 618                                                 sin6 = malloc(sizeof(struct sockaddr_in6));
 619                                                 if (sin6 == NULL)
 620                                                         out_of_mem();
 621                                                 sin6->sin6_family = AF_INET6;
 622                                                 sin6->sin6_port = htons(0);
 623                                                 sin6->sin6_addr = in6addr_any;
 624                                                 res->ai_addr = (struct sockaddr*) sin6;
 625                                                 res->ai_addrlen = (socklen_t)
 626                                                     sizeof(struct sockaddr_in6);
 627                                                 break;
 628                                         default:
 629                                                 syslog(LOG_ERR,
 630                                                     "bad address family %d",
 631                                                     res->ai_family);
 632                                                 exit(1);
 633                                 }
 634                         } else {
 635                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 636                                     &hints, &res)) != 0) {
 637                                         syslog(LOG_ERR,
 638                                             "cannot get local address for %s: %s",
 639                                             nconf->nc_netid,
 640                                             gai_strerror(aicode));
 641                                         if (!kernel_lockd)
 642                                                 close(fd);
 643                                         continue;
 644                                 }
 645                         }
 646                 } else {
 647                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 648                             &hints, &res)) != 0) {
 649                                 syslog(LOG_ERR,
 650                                     "cannot get local address for %s: %s",
 651                                     nconf->nc_netid, gai_strerror(aicode));
 652                                 if (!kernel_lockd)
 653                                         close(fd);
 654                                 continue;
 655                         }
 656                 }
 657
 658                 if (kernel_lockd) {
 659                         struct netbuf servaddr;
 660                         char *uaddr;
 661
 662                         /*
 663                          * Look up addresses for the kernel to create transports for.
 664                          */
 665                         servaddr.len = servaddr.maxlen = res->ai_addrlen;
 666                         servaddr.buf = res->ai_addr;
 667                         uaddr = taddr2uaddr(nconf, &servaddr);
 668
 669                         addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
 670                         if (!addrs)
 671                                 out_of_mem();
 672                         addrs[2 * naddrs] = strdup(nconf->nc_netid);
 673                         addrs[2 * naddrs + 1] = uaddr;
 674                         naddrs++;
 675                 } else {
 676                         /* Store the fd. */
 677                         sock_fd[sock_fdcnt - 1] = fd;
 678
 679                         /* Now, attempt the bind. */
 680                         r = bindresvport_sa(fd, res->ai_addr);
 681                         if (r != 0) {
 682                                 if (errno == EADDRINUSE && mallocd_svcport != 0) {
 683                                         if (mallocd_res != 0) {
 684                                                 free(res->ai_addr);
 685                                                 free(res);
 686                                         } else
 687                                                 freeaddrinfo(res);
 688                                         return (-1);
 689                                 }
 690                                 syslog(LOG_ERR, "bindresvport_sa: %m");
 691                                 exit(1);
 692                         }
 693
 694                         if (svcport_str == NULL) {
 695                                 svcport_str = malloc(NI_MAXSERV * sizeof(char));
 696                                 if (svcport_str == NULL)
 697                                         out_of_mem();
 698                                 mallocd_svcport = 1;
 699
 700                                 if (getnameinfo(res->ai_addr,
 701                                 res->ai_addr->sa_len, NULL, NI_MAXHOST,
 702                                 svcport_str, NI_MAXSERV * sizeof(char),
 703                                 NI_NUMERICHOST | NI_NUMERICSERV))
 704                                         errx(1, "Cannot get port number");
 705                         }
 706                 }
 707
 708                 if (mallocd_res != 0) {
 709                         free(res->ai_addr);
 710                         free(res);
 711                 } else
 712                         freeaddrinfo(res);
 713                 res = NULL;
 714         }
 715         return (0);
 716 }
 717
 718 /*
 719  * Called after all the create_service() calls have succeeded, to complete
 720  * the setup and registration.
 721  */
 722 static void
 723 complete_service(struct netconfig *nconf, char *port_str)
 724 {
 725         struct addrinfo hints, *res = NULL;
 726         struct __rpc_sockinfo si;
 727         struct netbuf servaddr;
 728         SVCXPRT *transp = NULL;
 729         int aicode, fd, nhostsbak;
 730         int registered = 0;
 731
 732         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 733             (nconf->nc_semantics != NC_TPI_COTS) &&
 734             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 735                 return; /* not my type */
 736
 737         /*
 738          * XXX - using RPC library internal functions.
 739          */
 740         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 741                 syslog(LOG_ERR, "cannot get information for %s",
 742                     nconf->nc_netid);
 743                 return;
 744         }
 745
 746         nhostsbak = nhosts;
 747         while (nhostsbak > 0) {
 748                 --nhostsbak;
 749                 if (sock_fdpos >= sock_fdcnt) {
 750                         /* Should never happen. */
 751                         syslog(LOG_ERR, "Ran out of socket fd's");
 752                         return;
 753                 }
 754                 fd = sock_fd[sock_fdpos++];
 755                 if (fd < 0)
 756                         continue;
 757
 758                 if (nconf->nc_semantics != NC_TPI_CLTS)
 759                     listen(fd, SOMAXCONN);
 760
 761                 transp = svc_tli_create(fd, nconf, NULL,
 762                     RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 763
 764                 if (transp != (SVCXPRT *) NULL) {
 765                         if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
 766                             NULL))
 767                                 syslog(LOG_ERR,
 768                                     "can't register %s NLM_PROG, NLM_SM service",
 769                                     nconf->nc_netid);
 770
 771                         if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
 772                             NULL))
 773                                 syslog(LOG_ERR,
 774                                     "can't register %s NLM_PROG, NLM_VERS service",
 775                                     nconf->nc_netid);
 776
 777                         if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
 778                             NULL))
 779                                 syslog(LOG_ERR,
 780                                     "can't register %s NLM_PROG, NLM_VERSX service",
 781                                     nconf->nc_netid);
 782
 783                         if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
 784                             NULL))
 785                                 syslog(LOG_ERR,
 786                                     "can't register %s NLM_PROG, NLM_VERS4 service",
 787                                     nconf->nc_netid);
 788
 789                 } else
 790                         syslog(LOG_WARNING, "can't create %s services",
 791                             nconf->nc_netid);
 792
 793                 if (registered == 0) {
 794                         registered = 1;
 795                         memset(&hints, 0, sizeof hints);
 796                         hints.ai_flags = AI_PASSIVE;
 797                         hints.ai_family = si.si_af;
 798                         hints.ai_socktype = si.si_socktype;
 799                         hints.ai_protocol = si.si_proto;
 800
 801                         if ((aicode = getaddrinfo(NULL, port_str, &hints,
 802                             &res)) != 0) {
 803                                 syslog(LOG_ERR, "cannot get local address: %s",
 804                                     gai_strerror(aicode));
 805                                 exit(1);
 806                         }
 807
 808                         servaddr.buf = malloc(res->ai_addrlen);
 809                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 810                         servaddr.len = res->ai_addrlen;
 811
 812                         rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
 813                         rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
 814                         rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
 815                         rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
 816
 817                         xcreated++;
 818                         freeaddrinfo(res);
 819                 }
 820         } /* end while */
 821 }
 822
 823 /*
 824  * Clear out sockets after a failure to bind one of them, so that the
 825  * cycle of socket creation/binding can start anew.
 826  */
 827 static void
 828 clearout_service(void)
 829 {
 830         int i;
 831
 832         for (i = 0; i < sock_fdcnt; i++) {
 833                 if (sock_fd[i] >= 0) {
 834                         shutdown(sock_fd[i], SHUT_RDWR);
 835                         close(sock_fd[i]);
 836                 }
 837         }
 838 }
 839
 840 void
 841 sigalarm_handler(void)
 842 {
 843
 844         grace_expired = 1;
 845 }
 846
 847 void
 848 usage()
 849 {
 850         errx(1, "usage: rpc.lockd [-d <debuglevel>]"
 851             " [-F] [-g <grace period>] [-h <bindip>] [-p <port>]");
 852 }
 853
 854 /*
 855  * init_nsm --
 856  *      Reset the NSM state-of-the-world and acquire its state.
 857  */
 858 void
 859 init_nsm(void)
 860 {
 861         enum clnt_stat ret;
 862         my_id id;
 863         sm_stat stat;
 864         char name[] = "NFS NLM";
 865
 866         /*
 867          * !!!
 868          * The my_id structure isn't used by the SM_UNMON_ALL call, as far
 869          * as I know.  Leave it empty for now.
 870          */
 871         memset(&id, 0, sizeof(id));
 872         id.my_name = name;
 873
 874         /*
 875          * !!!
 876          * The statd program must already be registered when lockd runs.
 877          */
 878         do {
 879                 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
 880                     (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
 881                 if (ret == RPC_PROGUNAVAIL) {
 882                         syslog(LOG_WARNING, "%lu %s", SM_PROG,
 883                             clnt_sperrno(ret));
 884                         sleep(2);
 885                         continue;
 886                 }
 887                 break;
 888         } while (0);
 889
 890         if (ret != 0) {
 891                 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
 892                 exit(1);
 893         }
 894
 895         nsm_state = stat.state;
 896
 897         /* setup constant data for SM_MON calls */
 898         mon_host.mon_id.my_id.my_name = localhost;
 899         mon_host.mon_id.my_id.my_prog = NLM_PROG;
 900         mon_host.mon_id.my_id.my_vers = NLM_SM;
 901         mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY;  /* bsdi addition */
 902 }
 903
 904 /*
 905  * Out of memory, fatal
 906  */
 907 void out_of_mem()
 908 {
 909         syslog(LOG_ERR, "out of memory");
 910         exit(2);
 911 }