sbin/mountd/mountd.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Herb Hasler and Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#) Copyright (c) 1989, 1993 The Regents of the University of California.  All rights reserved.
  33  * @(#)mountd.c 8.15 (Berkeley) 5/1/95
  34  * $FreeBSD: head/usr.sbin/mountd/mountd.c 173056 2007-10-27 12:24:47Z simon $
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/module.h>
  39 #include <sys/mount.h>
  40 #include <sys/mountctl.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/linker.h>
  43 #include <sys/stat.h>
  44 #include <sys/syslog.h>
  45 #include <sys/sysctl.h>
  46
  47 #include <rpc/rpc.h>
  48 #include <rpc/rpc_com.h>
  49 #include <rpcsvc/mount.h>
  50 #include <vfs/nfs/rpcv2.h>
  51 #include <vfs/nfs/nfsproto.h>
  52 #include <vfs/nfs/nfs.h>
  53 #include <vfs/ufs/ufsmount.h>
  54 #include <vfs/msdosfs/msdosfsmount.h>
  55 #include <vfs/ntfs/ntfsmount.h>
  56 #include <vfs/isofs/cd9660/cd9660_mount.h>      /* XXX need isofs in include */
  57
  58 #include <arpa/inet.h>
  59
  60 #include <ctype.h>
  61 #include <err.h>
  62 #include <errno.h>
  63 #include <grp.h>
  64 #include <limits.h>
  65 #include <libutil.h>
  66 #include <netdb.h>
  67 #include <pwd.h>
  68 #include <signal.h>
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71 #include <string.h>
  72 #include <unistd.h>
  73 #include "pathnames.h"
  74
  75 #ifdef DEBUG
  76 #include <stdarg.h>
  77 #endif
  78
  79 /*
  80  * Structures for keeping the mount list and export list
  81  */
  82 struct mountlist {
  83         struct mountlist *ml_next;
  84         char    ml_host[RPCMNT_NAMELEN+1];
  85         char    ml_dirp[RPCMNT_PATHLEN+1];
  86 };
  87
  88 struct dirlist {
  89         struct dirlist  *dp_left;
  90         struct dirlist  *dp_right;
  91         int             dp_flag;
  92         struct hostlist *dp_hosts;      /* List of hosts this dir exported to */
  93         char            dp_dirp[1];     /* Actually malloc'd to size of dir */
  94 };
  95 /* dp_flag bits */
  96 #define DP_DEFSET       0x1
  97 #define DP_HOSTSET      0x2
  98
  99 struct exportlist {
 100         struct exportlist *ex_next;
 101         struct dirlist  *ex_dirl;
 102         struct dirlist  *ex_defdir;
 103         int             ex_flag;
 104         fsid_t          ex_fs;
 105         char            *ex_fsdir;
 106         char            *ex_indexfile;
 107 };
 108 /* ex_flag bits */
 109 #define EX_LINKED       0x1
 110
 111 struct netmsk {
 112         struct sockaddr_storage nt_net;
 113         struct sockaddr_storage nt_mask;
 114         char            *nt_name;
 115 };
 116
 117 union grouptypes {
 118         struct addrinfo *gt_addrinfo;
 119         struct netmsk   gt_net;
 120 };
 121
 122 struct grouplist {
 123         int gr_type;
 124         union grouptypes gr_ptr;
 125         struct grouplist *gr_next;
 126 };
 127 /* Group types */
 128 #define GT_NULL         0x0
 129 #define GT_HOST         0x1
 130 #define GT_NET          0x2
 131 #define GT_DEFAULT      0x3
 132 #define GT_IGNORE       0x5
 133
 134 struct hostlist {
 135         int              ht_flag;       /* Uses DP_xx bits */
 136         struct grouplist *ht_grp;
 137         struct hostlist  *ht_next;
 138 };
 139
 140 struct fhreturn {
 141         int     fhr_flag;
 142         int     fhr_vers;
 143         nfsfh_t fhr_fh;
 144 };
 145
 146 /* Global defs */
 147 char    *add_expdir(struct dirlist **, char *, int);
 148 void    add_dlist(struct dirlist **, struct dirlist *,
 149                                 struct grouplist *, int);
 150 void    add_mlist(char *, char *);
 151 int     check_dirpath(char *);
 152 int     check_options(struct dirlist *);
 153 int     checkmask(struct sockaddr *sa);
 154 int     chk_host(struct dirlist *, struct sockaddr *, int *, int *);
 155 void    create_service(struct netconfig *nconf);
 156 void    del_mlist(char *, char *);
 157 struct dirlist *dirp_search(struct dirlist *, char *);
 158 int     do_mount(struct exportlist *, struct grouplist *, int,
 159                 struct ucred *, char *, int, struct statfs *);
 160 int     do_opt(char **, char **, struct exportlist *, struct grouplist *,
 161                                 int *, int *, struct ucred *);
 162 struct  exportlist *ex_search(fsid_t *);
 163 struct  exportlist *get_exp(void);
 164 void    free_dir(struct dirlist *);
 165 void    free_exp(struct exportlist *);
 166 void    free_grp(struct grouplist *);
 167 void    free_host(struct hostlist *);
 168 void    get_exportlist(void);
 169 int     get_host(char *, struct grouplist *, struct grouplist *);
 170 struct hostlist *get_ht(void);
 171 int     get_line(void);
 172 void    get_mountlist(void);
 173 int     get_net(char *, struct netmsk *, int);
 174 void    getexp_err(struct exportlist *, struct grouplist *);
 175 struct grouplist *get_grp(void);
 176 void    hang_dirp(struct dirlist *, struct grouplist *,
 177                                 struct exportlist *, int);
 178 void    huphandler(int sig);
 179 int     makemask(struct sockaddr_storage *ssp, int bitlen);
 180 void    mntsrv(struct svc_req *, SVCXPRT *);
 181 void    nextfield(char **, char **);
 182 void    out_of_mem(void);
 183 void    parsecred(char *, struct ucred *);
 184 int     put_exlist(struct dirlist *, XDR *, struct dirlist *, int *, int);
 185 void    *sa_rawaddr(struct sockaddr *sa, int *nbytes);
 186 int     sacmp(struct sockaddr *sa1, struct sockaddr *sa2,
 187     struct sockaddr *samask);
 188 int     scan_tree(struct dirlist *, struct sockaddr *);
 189 static void usage(void);
 190 int     xdr_dir(XDR *, char *);
 191 int     xdr_explist(XDR *, caddr_t);
 192 int     xdr_explist_brief(XDR *, caddr_t);
 193 int     xdr_fhs(XDR *, caddr_t);
 194 int     xdr_mlist(XDR *, caddr_t);
 195 void    terminate(int);
 196
 197 struct exportlist *exphead;
 198 struct mountlist *mlhead;
 199 struct grouplist *grphead;
 200 char *exnames_default[2] = { _PATH_EXPORTS, NULL };
 201 char **exnames;
 202 char **hosts = NULL;
 203 struct ucred def_anon = {
 204         1,
 205         (uid_t) -2,
 206         1,
 207         { (gid_t) -2 }
 208 };
 209 int force_v2 = 0;
 210 int resvport_only = 1;
 211 int nhosts = 0;
 212 int dir_only = 1;
 213 int dolog = 0;
 214 int got_sighup = 0;
 215
 216 int xcreated = 0;
 217 char *svcport_str = NULL;
 218 int opt_flags;
 219 static int have_v6 = 1;
 220
 221 struct pidfh *pfh = NULL;
 222 /* Bits for the opt_flags above */
 223 #define OP_MAPROOT      0x01
 224 #define OP_MAPALL       0x02
 225 /* 0x4 free */
 226 #define OP_MASK         0x08
 227 #define OP_NET          0x10
 228 #define OP_ALLDIRS      0x40
 229 #define OP_HAVEMASK     0x80    /* A mask was specified or inferred. */
 230 #define OP_QUIET        0x100
 231 #define OP_MASKLEN      0x200
 232
 233 #ifdef DEBUG
 234 int debug = 1;
 235 void    SYSLOG(int, const char *, ...);
 236 #define syslog SYSLOG
 237 #else
 238 int debug = 0;
 239 #endif
 240
 241 /*
 242  * Mountd server for NFS mount protocol as described in:
 243  * NFS: Network File System Protocol Specification, RFC1094, Appendix A
 244  * The optional arguments are the exports file name
 245  * default: _PATH_EXPORTS
 246  * and "-n" to allow nonroot mount.
 247  */
 248 int
 249 main(int argc, char **argv)
 250 {
 251         fd_set readfds;
 252         struct netconfig *nconf;
 253         char *endptr, **hosts_bak;
 254         void *nc_handle;
 255         pid_t otherpid;
 256         in_port_t svcport;
 257         int c, k, s;
 258         int maxrec = RPC_MAXDATASIZE;
 259
 260         /* Check that another mountd isn't already running. */
 261         pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid);
 262         if (pfh == NULL) {
 263                 if (errno == EEXIST)
 264                         errx(1, "mountd already running, pid: %d.", otherpid);
 265                 warn("cannot open or create pidfile");
 266         }
 267
 268         s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 269         if (s < 0)
 270                 have_v6 = 0;
 271         else
 272                 close(s);
 273         if (modfind("nfs") < 0) {
 274                 /* Not present in kernel, try loading it */
 275                 if (kldload("nfs") < 0 || modfind("nfs") < 0)
 276                         errx(1, "NFS server is not available or loadable");
 277         }
 278
 279         while ((c = getopt(argc, argv, "2dh:lnp:r")) != -1) {
 280                 switch (c) {
 281                 case '2':
 282                         force_v2 = 1;
 283                         break;
 284                 case 'n':
 285                         resvport_only = 0;
 286                         break;
 287                 case 'r':
 288                         dir_only = 0;
 289                         break;
 290                 case 'd':
 291                         debug = debug ? 0 : 1;
 292                         break;
 293                 case 'l':
 294                         dolog = 1;
 295                         break;
 296                 case 'p':
 297                         endptr = NULL;
 298                         svcport = (in_port_t)strtoul(optarg, &endptr, 10);
 299                         if (endptr == NULL || *endptr != '\0' ||
 300                             svcport == 0 || svcport >= IPPORT_MAX)
 301                                 usage();
 302                         svcport_str = strdup(optarg);
 303                         break;
 304                 case 'h':
 305                         ++nhosts;
 306                         hosts_bak = hosts;
 307                         hosts_bak = realloc(hosts, nhosts * sizeof(char *));
 308                         if (hosts_bak == NULL) {
 309                                 if (hosts != NULL) {
 310                                         for (k = 0; k < nhosts; k++)
 311                                                 free(hosts[k]);
 312                                         free(hosts);
 313                                         out_of_mem();
 314                                 }
 315                         }
 316                         hosts = hosts_bak;
 317                         hosts[nhosts - 1] = strdup(optarg);
 318                         if (hosts[nhosts - 1] == NULL) {
 319                                 for (k = 0; k < (nhosts - 1); k++)
 320                                         free(hosts[k]);
 321                                 free(hosts);
 322                                 out_of_mem();
 323                         }
 324                         break;
 325                 default:
 326                         usage();
 327                 }
 328         }
 329         if (debug == 0) {
 330                 daemon(0, 0);
 331                 signal(SIGINT, SIG_IGN);
 332                 signal(SIGQUIT, SIG_IGN);
 333         }
 334         argc -= optind;
 335         argv += optind;
 336         grphead = NULL;
 337         exphead = NULL;
 338         mlhead = NULL;
 339         if (argc > 0)
 340                 exnames = argv;
 341         else
 342                 exnames = exnames_default;
 343         openlog("mountd", LOG_PID, LOG_DAEMON);
 344         if (debug)
 345                 warnx("getting export list");
 346         get_exportlist();
 347         if (debug)
 348                 warnx("getting mount list");
 349         get_mountlist();
 350         if (debug)
 351                 warnx("here we go");
 352         signal(SIGHUP, huphandler);
 353         signal(SIGTERM, terminate);
 354         signal(SIGPIPE, SIG_IGN);
 355
 356         pidfile_write(pfh);
 357
 358         rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
 359         rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
 360
 361         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 362
 363         if (!resvport_only) {
 364                 if (sysctlbyname("vfs.nfs.nfs_privport", NULL, NULL,
 365                         &resvport_only, sizeof(resvport_only)) != 0 &&
 366                     errno != ENOENT) {
 367                         syslog(LOG_ERR, "sysctl: %m");
 368                         exit(1);
 369                 }
 370         }
 371
 372         /*
 373          * If no hosts were specified, add a wildcard entry to bind to
 374          * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
 375          * list.
 376          */
 377         if (nhosts == 0) {
 378                 hosts = malloc(sizeof(char**));
 379                 if (hosts == NULL)
 380                         out_of_mem();
 381                 hosts[0] = "*";
 382                 nhosts = 1;
 383         } else {
 384                 hosts_bak = hosts;
 385                 if (have_v6) {
 386                         hosts_bak = realloc(hosts, (nhosts + 2) *
 387                             sizeof(char *));
 388                         if (hosts_bak == NULL) {
 389                                 for (k = 0; k < nhosts; k++)
 390                                         free(hosts[k]);
 391                                 free(hosts);
 392                                 out_of_mem();
 393                         } else
 394                                 hosts = hosts_bak;
 395                         nhosts += 2;
 396                         hosts[nhosts - 2] = "::1";
 397                 } else {
 398                         hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
 399                         if (hosts_bak == NULL) {
 400                                 for (k = 0; k < nhosts; k++)
 401                                         free(hosts[k]);
 402                                 free(hosts);
 403                                 out_of_mem();
 404                         } else {
 405                                 nhosts += 1;
 406                                 hosts = hosts_bak;
 407                         }
 408                 }
 409                 hosts[nhosts - 1] = "127.0.0.1";
 410         }
 411
 412         nc_handle = setnetconfig();
 413         while ((nconf = getnetconfig(nc_handle))) {
 414                 if (nconf->nc_flag & NC_VISIBLE) {
 415                         if (have_v6 == 0 && strcmp(nconf->nc_protofmly,
 416                                 "inet6") == 0) {
 417                                 /* DO NOTHING */
 418                         } else
 419                                 create_service(nconf);
 420                 }
 421         }
 422         endnetconfig(nc_handle);
 423
 424         if (xcreated == 0) {
 425                 syslog(LOG_ERR, "could not create any services");
 426                 exit(1);
 427         }
 428
 429         /* Expand svc_run() here so that we can call get_exportlist(). */
 430         for (;;) {
 431                 if (got_sighup) {
 432                         get_exportlist();
 433                         got_sighup = 0;
 434                 }
 435                 readfds = svc_fdset;
 436                 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) {
 437                 case -1:
 438                         if (errno == EINTR)
 439                                 continue;
 440                         syslog(LOG_ERR, "mountd died: select: %m");
 441                         exit(1);
 442                 case 0:
 443                         continue;
 444                 default:
 445                         svc_getreqset(&readfds);
 446                 }
 447         }
 448 }
 449
 450 /*
 451  * This routine creates and binds sockets on the appropriate
 452  * addresses. It gets called one time for each transport and
 453  * registrates the service with rpcbind on that trasport.
 454  */
 455 void
 456 create_service(struct netconfig *nconf)
 457 {
 458         struct addrinfo hints, *res = NULL;
 459         struct sockaddr_in *sin;
 460         struct sockaddr_in6 *sin6;
 461         struct __rpc_sockinfo si;
 462         struct netbuf servaddr;
 463         SVCXPRT *transp = NULL;
 464         int aicode;
 465         int fd;
 466         int nhostsbak;
 467         int one = 1;
 468         int r;
 469         int registered = 0;
 470         u_int32_t host_addr[4];  /* IPv4 or IPv6 */
 471
 472         if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 473             (nconf->nc_semantics != NC_TPI_COTS) &&
 474             (nconf->nc_semantics != NC_TPI_COTS_ORD))
 475                 return; /* not my type */
 476
 477         /*
 478          * XXX - using RPC library internal functions.
 479          */
 480         if (!__rpc_nconf2sockinfo(nconf, &si)) {
 481                 syslog(LOG_ERR, "cannot get information for %s",
 482                     nconf->nc_netid);
 483                 return;
 484         }
 485
 486         /* Get mountd's address on this transport */
 487         memset(&hints, 0, sizeof hints);
 488         hints.ai_flags = AI_PASSIVE;
 489         hints.ai_family = si.si_af;
 490         hints.ai_socktype = si.si_socktype;
 491         hints.ai_protocol = si.si_proto;
 492
 493         /*
 494          * Bind to specific IPs if asked to
 495          */
 496         nhostsbak = nhosts;
 497         while (nhostsbak > 0) {
 498                 --nhostsbak;
 499                 /*
 500                  * XXX - using RPC library internal functions.
 501                  */
 502                 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
 503                         int non_fatal = 0;
 504                         if (errno == EPROTONOSUPPORT &&
 505                             nconf->nc_semantics != NC_TPI_CLTS)
 506                                 non_fatal = 1;
 507
 508                         syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
 509                             "cannot create socket for %s", nconf->nc_netid);
 510                         return;
 511                 }
 512
 513                 switch (hints.ai_family) {
 514                 case AF_INET:
 515                         if (inet_pton(AF_INET, hosts[nhostsbak],
 516                                 host_addr) == 1) {
 517                                 hints.ai_flags &= AI_NUMERICHOST;
 518                         } else {
 519                                 /*
 520                                  * Skip if we have an AF_INET6 address.
 521                                  */
 522                                 if (inet_pton(AF_INET6, hosts[nhostsbak],
 523                                         host_addr) == 1) {
 524                                         close(fd);
 525                                         continue;
 526                                 }
 527                         }
 528                         break;
 529                 case AF_INET6:
 530                         if (inet_pton(AF_INET6, hosts[nhostsbak],
 531                                 host_addr) == 1) {
 532                                 hints.ai_flags &= AI_NUMERICHOST;
 533                         } else {
 534                                 /*
 535                                  * Skip if we have an AF_INET address.
 536                                  */
 537                                 if (inet_pton(AF_INET, hosts[nhostsbak],
 538                                         host_addr) == 1) {
 539                                         close(fd);
 540                                         continue;
 541                                 }
 542                         }
 543
 544                         /*
 545                          * We're doing host-based access checks here, so don't
 546                          * allow v4-in-v6 to confuse things. The kernel will
 547                          * disable it by default on NFS sockets too.
 548                          */
 549                         if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one,
 550                                 sizeof one) < 0) {
 551                                 syslog(LOG_ERR,
 552                                     "can't disable v4-in-v6 on IPv6 socket");
 553                                 exit(1);
 554                         }
 555                         break;
 556                 default:
 557                         break;
 558                 }
 559
 560                 /*
 561                  * If no hosts were specified, just bind to INADDR_ANY
 562                  */
 563                 if (strcmp("*", hosts[nhostsbak]) == 0) {
 564                         if (svcport_str == NULL) {
 565                                 res = malloc(sizeof(struct addrinfo));
 566                                 if (res == NULL)
 567                                         out_of_mem();
 568                                 res->ai_flags = hints.ai_flags;
 569                                 res->ai_family = hints.ai_family;
 570                                 res->ai_protocol = hints.ai_protocol;
 571                                 switch (res->ai_family) {
 572                                 case AF_INET:
 573                                         sin = malloc(sizeof(struct sockaddr_in));
 574                                         if (sin == NULL)
 575                                                 out_of_mem();
 576                                         sin->sin_family = AF_INET;
 577                                         sin->sin_port = htons(0);
 578                                         sin->sin_addr.s_addr = htonl(INADDR_ANY);
 579                                         res->ai_addr = (struct sockaddr*) sin;
 580                                         res->ai_addrlen = (socklen_t)
 581                                             sizeof(res->ai_addr);
 582                                         break;
 583                                 case AF_INET6:
 584                                         sin6 = malloc(sizeof(struct sockaddr_in6));
 585                                         if (sin6 == NULL)
 586                                                 out_of_mem();
 587                                         sin6->sin6_family = AF_INET6;
 588                                         sin6->sin6_port = htons(0);
 589                                         sin6->sin6_addr = in6addr_any;
 590                                         res->ai_addr = (struct sockaddr*) sin6;
 591                                         res->ai_addrlen = (socklen_t)
 592                                             sizeof(res->ai_addr);
 593                                         break;
 594                                 default:
 595                                         break;
 596                                 }
 597                         } else {
 598                                 if ((aicode = getaddrinfo(NULL, svcport_str,
 599                                             &hints, &res)) != 0) {
 600                                         syslog(LOG_ERR,
 601                                             "cannot get local address for %s: %s",
 602                                             nconf->nc_netid,
 603                                             gai_strerror(aicode));
 604                                         continue;
 605                                 }
 606                         }
 607                 } else {
 608                         if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
 609                                     &hints, &res)) != 0) {
 610                                 syslog(LOG_ERR,
 611                                     "cannot get local address for %s: %s",
 612                                     nconf->nc_netid, gai_strerror(aicode));
 613                                 continue;
 614                         }
 615                 }
 616
 617                 r = bindresvport_sa(fd, res->ai_addr);
 618                 if (r != 0) {
 619                         syslog(LOG_ERR, "bindresvport_sa: %m");
 620                         exit(1);
 621                 }
 622
 623                 if (nconf->nc_semantics != NC_TPI_CLTS)
 624                         listen(fd, SOMAXCONN);
 625
 626                 if (nconf->nc_semantics == NC_TPI_CLTS )
 627                         transp = svc_dg_create(fd, 0, 0);
 628                 else
 629                         transp = svc_vc_create(fd, RPC_MAXDATASIZE,
 630                             RPC_MAXDATASIZE);
 631
 632                 if (transp != NULL) {
 633                         if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER1, mntsrv,
 634                                 NULL))
 635                                 syslog(LOG_ERR,
 636                                     "can't register %s RPCMNT_VER1 service",
 637                                     nconf->nc_netid);
 638                         if (!force_v2) {
 639                                 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER3,
 640                                         mntsrv, NULL))
 641                                         syslog(LOG_ERR,
 642                                             "can't register %s RPCMNT_VER3 service",
 643                                             nconf->nc_netid);
 644                         }
 645                 } else
 646                         syslog(LOG_WARNING, "can't create %s services",
 647                             nconf->nc_netid);
 648
 649                 if (registered == 0) {
 650                         registered = 1;
 651                         memset(&hints, 0, sizeof hints);
 652                         hints.ai_flags = AI_PASSIVE;
 653                         hints.ai_family = si.si_af;
 654                         hints.ai_socktype = si.si_socktype;
 655                         hints.ai_protocol = si.si_proto;
 656
 657                         if (svcport_str == NULL) {
 658                                 svcport_str = malloc(NI_MAXSERV * sizeof(char));
 659                                 if (svcport_str == NULL)
 660                                         out_of_mem();
 661
 662                                 if (getnameinfo(res->ai_addr,
 663                                         res->ai_addr->sa_len, NULL, NI_MAXHOST,
 664                                         svcport_str, NI_MAXSERV * sizeof(char),
 665                                         NI_NUMERICHOST | NI_NUMERICSERV))
 666                                         errx(1, "Cannot get port number");
 667                         }
 668
 669                         if((aicode = getaddrinfo(NULL, svcport_str, &hints,
 670                                     &res)) != 0) {
 671                                 syslog(LOG_ERR, "cannot get local address: %s",
 672                                     gai_strerror(aicode));
 673                                 exit(1);
 674                         }
 675
 676                         servaddr.buf = malloc(res->ai_addrlen);
 677                         memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
 678                         servaddr.len = res->ai_addrlen;
 679
 680                         rpcb_set(RPCPROG_MNT, RPCMNT_VER1, nconf, &servaddr);
 681                         rpcb_set(RPCPROG_MNT, RPCMNT_VER3, nconf, &servaddr);
 682
 683                         xcreated++;
 684                         freeaddrinfo(res);
 685                 }
 686         } /* end while */
 687 }
 688
 689 static void
 690 usage(void)
 691 {
 692         fprintf(stderr,
 693                 "usage: mountd [-2] [-d] [-l] [-n] [-p <port>] [-r] "
 694                 "[-h <bindip>] [export_file ...]\n");
 695         exit(1);
 696 }
 697
 698 /*
 699  * The mount rpc service
 700  */
 701 void
 702 mntsrv(struct svc_req *rqstp, SVCXPRT *transp)
 703 {
 704         struct exportlist *ep;
 705         struct dirlist *dp;
 706         struct fhreturn fhr;
 707         struct stat stb;
 708         struct statfs fsb;
 709         char host[NI_MAXHOST], numerichost[NI_MAXHOST];
 710         int lookup_failed = 1;
 711         struct sockaddr *saddr;
 712         u_short sport;
 713         char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN];
 714         int bad = 0, defset, hostset;
 715         sigset_t sighup_mask;
 716
 717         sigemptyset(&sighup_mask);
 718         sigaddset(&sighup_mask, SIGHUP);
 719         saddr = svc_getrpccaller(transp)->buf;
 720         switch (saddr->sa_family) {
 721         case AF_INET6:
 722                 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port);
 723                 break;
 724         case AF_INET:
 725                 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port);
 726                 break;
 727         default:
 728                 syslog(LOG_ERR, "request from unknown address family");
 729                 return;
 730         }
 731         lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host,
 732             NULL, 0, 0);
 733         getnameinfo(saddr, saddr->sa_len, numerichost,
 734             sizeof numerichost, NULL, 0, NI_NUMERICHOST);
 735         switch (rqstp->rq_proc) {
 736         case NULLPROC:
 737                 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
 738                         syslog(LOG_ERR, "can't send reply");
 739                 return;
 740         case RPCMNT_MOUNT:
 741                 if (sport >= IPPORT_RESERVED && resvport_only) {
 742                         syslog(LOG_NOTICE,
 743                             "mount request from %s from unprivileged port",
 744                             numerichost);
 745                         svcerr_weakauth(transp);
 746                         return;
 747                 }
 748                 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
 749                         syslog(LOG_NOTICE, "undecodable mount request from %s",
 750                             numerichost);
 751                         svcerr_decode(transp);
 752                         return;
 753                 }
 754
 755                 /*
 756                  * Get the real pathname and make sure it is a directory
 757                  * or a regular file if the -r option was specified
 758                  * and it exists.
 759                  */
 760                 if (realpath(rpcpath, dirpath) == NULL ||
 761                     stat(dirpath, &stb) < 0 ||
 762                     (!S_ISDIR(stb.st_mode) &&
 763                     (dir_only || !S_ISREG(stb.st_mode))) ||
 764                     statfs(dirpath, &fsb) < 0) {
 765                         chdir("/");     /* Just in case realpath doesn't */
 766                         syslog(LOG_NOTICE,
 767                             "mount request from %s for non existent path %s",
 768                             numerichost, dirpath);
 769                         if (debug)
 770                                 warnx("stat failed on %s", dirpath);
 771                         bad = ENOENT;   /* We will send error reply later */
 772                 }
 773
 774                 /* Check in the exports list */
 775                 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
 776                 ep = ex_search(&fsb.f_fsid);
 777                 hostset = defset = 0;
 778                 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) ||
 779                     ((dp = dirp_search(ep->ex_dirl, dirpath)) &&
 780                       chk_host(dp, saddr, &defset, &hostset)) ||
 781                     (defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
 782                      scan_tree(ep->ex_dirl, saddr) == 0))) {
 783                         if (bad) {
 784                                 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
 785                                     &bad))
 786                                         syslog(LOG_ERR, "can't send reply");
 787                                 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
 788                                 return;
 789                         }
 790                         if (hostset & DP_HOSTSET)
 791                                 fhr.fhr_flag = hostset;
 792                         else
 793                                 fhr.fhr_flag = defset;
 794                         fhr.fhr_vers = rqstp->rq_vers;
 795                         /* Get the file handle */
 796                         memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t));
 797                         if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) {
 798                                 bad = errno;
 799                                 syslog(LOG_ERR, "can't get fh for %s", dirpath);
 800                                 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
 801                                     &bad))
 802                                         syslog(LOG_ERR, "can't send reply");
 803                                 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
 804                                 return;
 805                         }
 806                         if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, &fhr))
 807                                 syslog(LOG_ERR, "can't send reply");
 808                         if (!lookup_failed)
 809                                 add_mlist(host, dirpath);
 810                         else
 811                                 add_mlist(numerichost, dirpath);
 812                         if (debug)
 813                                 warnx("mount successful");
 814                         if (dolog)
 815                                 syslog(LOG_NOTICE,
 816                                     "mount request succeeded from %s for %s",
 817                                     numerichost, dirpath);
 818                 } else {
 819                         bad = EACCES;
 820                         syslog(LOG_NOTICE,
 821                             "mount request denied from %s for %s",
 822                             numerichost, dirpath);
 823                 }
 824
 825                 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, &bad))
 826                         syslog(LOG_ERR, "can't send reply");
 827                 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
 828                 return;
 829         case RPCMNT_DUMP:
 830                 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, NULL))
 831                         syslog(LOG_ERR, "can't send reply");
 832                 else if (dolog)
 833                         syslog(LOG_NOTICE,
 834                             "dump request succeeded from %s",
 835                             numerichost);
 836                 return;
 837         case RPCMNT_UMOUNT:
 838                 if (sport >= IPPORT_RESERVED && resvport_only) {
 839                         syslog(LOG_NOTICE,
 840                             "umount request from %s from unprivileged port",
 841                             numerichost);
 842                         svcerr_weakauth(transp);
 843                         return;
 844                 }
 845                 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
 846                         syslog(LOG_NOTICE, "undecodable umount request from %s",
 847                             numerichost);
 848                         svcerr_decode(transp);
 849                         return;
 850                 }
 851                 if (realpath(rpcpath, dirpath) == NULL) {
 852                         syslog(LOG_NOTICE, "umount request from %s "
 853                             "for non existent path %s",
 854                             numerichost, dirpath);
 855                 }
 856                 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
 857                         syslog(LOG_ERR, "can't send reply");
 858                 if (!lookup_failed)
 859                         del_mlist(host, dirpath);
 860                 del_mlist(numerichost, dirpath);
 861                 if (dolog)
 862                         syslog(LOG_NOTICE,
 863                             "umount request succeeded from %s for %s",
 864                             numerichost, dirpath);
 865                 return;
 866         case RPCMNT_UMNTALL:
 867                 if (sport >= IPPORT_RESERVED && resvport_only) {
 868                         syslog(LOG_NOTICE,
 869                             "umountall request from %s from unprivileged port",
 870                             numerichost);
 871                         svcerr_weakauth(transp);
 872                         return;
 873                 }
 874                 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
 875                         syslog(LOG_ERR, "can't send reply");
 876                 if (!lookup_failed)
 877                         del_mlist(host, NULL);
 878                 del_mlist(numerichost, NULL);
 879                 if (dolog)
 880                         syslog(LOG_NOTICE,
 881                             "umountall request succeeded from %s",
 882                             numerichost);
 883                 return;
 884         case RPCMNT_EXPORT:
 885                 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, NULL))
 886                         if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, NULL))
 887                                 syslog(LOG_ERR, "can't send reply");
 888                 if (dolog)
 889                         syslog(LOG_NOTICE,
 890                             "export request succeeded from %s",
 891                             numerichost);
 892                 return;
 893         default:
 894                 svcerr_noproc(transp);
 895                 return;
 896         }
 897 }
 898
 899 /*
 900  * Xdr conversion for a dirpath string
 901  */
 902 int
 903 xdr_dir(XDR *xdrsp, char *dirp)
 904 {
 905         return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
 906 }
 907
 908 /*
 909  * Xdr routine to generate file handle reply
 910  */
 911 int
 912 xdr_fhs(XDR *xdrsp, caddr_t cp)
 913 {
 914         struct fhreturn *fhrp = (struct fhreturn *)cp;
 915         u_long ok = 0, len, auth;
 916
 917         if (!xdr_long(xdrsp, &ok))
 918                 return (0);
 919         switch (fhrp->fhr_vers) {
 920         case 1:
 921                 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH));
 922         case 3:
 923                 len = NFSX_V3FH;
 924                 if (!xdr_long(xdrsp, &len))
 925                         return (0);
 926                 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len))
 927                         return (0);
 928                 auth = RPCAUTH_UNIX;
 929                 len = 1;
 930                 if (!xdr_long(xdrsp, &len))
 931                         return (0);
 932                 return (xdr_long(xdrsp, &auth));
 933         }
 934         return (0);
 935 }
 936
 937 int
 938 xdr_mlist(XDR *xdrsp, caddr_t cp)
 939 {
 940         struct mountlist *mlp;
 941         int true = 1;
 942         int false = 0;
 943         char *strp;
 944
 945         mlp = mlhead;
 946         while (mlp) {
 947                 if (!xdr_bool(xdrsp, &true))
 948                         return (0);
 949                 strp = &mlp->ml_host[0];
 950                 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
 951                         return (0);
 952                 strp = &mlp->ml_dirp[0];
 953                 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
 954                         return (0);
 955                 mlp = mlp->ml_next;
 956         }
 957         if (!xdr_bool(xdrsp, &false))
 958                 return (0);
 959         return (1);
 960 }
 961
 962 /*
 963  * Xdr conversion for export list
 964  */
 965 int
 966 xdr_explist_common(XDR *xdrsp, caddr_t cp, int brief)
 967 {
 968         struct exportlist *ep;
 969         int false = 0;
 970         int putdef;
 971         sigset_t sighup_mask;
 972
 973         sigemptyset(&sighup_mask);
 974         sigaddset(&sighup_mask, SIGHUP);
 975         sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
 976         ep = exphead;
 977         while (ep) {
 978                 putdef = 0;
 979                 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir,
 980                         &putdef, brief))
 981                         goto errout;
 982                 if (ep->ex_defdir && putdef == 0 &&
 983                         put_exlist(ep->ex_defdir, xdrsp, NULL,
 984                             &putdef, brief))
 985                         goto errout;
 986                 ep = ep->ex_next;
 987         }
 988         sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
 989         if (!xdr_bool(xdrsp, &false))
 990                 return (0);
 991         return (1);
 992 errout:
 993         sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
 994         return (0);
 995 }
 996
 997 /*
 998  * Called from xdr_explist() to traverse the tree and export the
 999  * directory paths.
1000  */
1001 int
1002 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, int brief)
1003 {
1004         struct grouplist *grp;
1005         struct hostlist *hp;
1006         int true = 1;
1007         int false = 0;
1008         int gotalldir = 0;
1009         char *strp;
1010
1011         if (dp) {
1012                 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief))
1013                         return (1);
1014                 if (!xdr_bool(xdrsp, &true))
1015                         return (1);
1016                 strp = dp->dp_dirp;
1017                 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
1018                         return (1);
1019                 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
1020                         gotalldir = 1;
1021                         *putdefp = 1;
1022                 }
1023                 if (brief) {
1024                         if (!xdr_bool(xdrsp, &true))
1025                                 return (1);
1026                         strp = "(...)";
1027                         if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
1028                                 return (1);
1029                 } else if ((dp->dp_flag & DP_DEFSET) == 0 &&
1030                     (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
1031                         hp = dp->dp_hosts;
1032                         while (hp) {
1033                                 grp = hp->ht_grp;
1034                                 if (grp->gr_type == GT_HOST) {
1035                                         if (!xdr_bool(xdrsp, &true))
1036                                                 return (1);
1037                                         strp = grp->gr_ptr.gt_addrinfo->ai_canonname;
1038                                         if (!xdr_string(xdrsp, &strp,
1039                                             RPCMNT_NAMELEN))
1040                                                 return (1);
1041                                 } else if (grp->gr_type == GT_NET) {
1042                                         if (!xdr_bool(xdrsp, &true))
1043                                                 return (1);
1044                                         strp = grp->gr_ptr.gt_net.nt_name;
1045                                         if (!xdr_string(xdrsp, &strp,
1046                                             RPCMNT_NAMELEN))
1047                                                 return (1);
1048                                 }
1049                                 hp = hp->ht_next;
1050                                 if (gotalldir && hp == NULL) {
1051                                         hp = adp->dp_hosts;
1052                                         gotalldir = 0;
1053                                 }
1054                         }
1055                 }
1056                 if (!xdr_bool(xdrsp, &false))
1057                         return (1);
1058                 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief))
1059                         return (1);
1060         }
1061         return (0);
1062 }
1063
1064 int
1065 xdr_explist(XDR *xdrsp, caddr_t cp)
1066 {
1067
1068         return xdr_explist_common(xdrsp, cp, 0);
1069 }
1070
1071 int
1072 xdr_explist_brief(XDR *xdrsp, caddr_t cp)
1073 {
1074
1075         return xdr_explist_common(xdrsp, cp, 1);
1076 }
1077
1078 char *line;
1079 int linesize;
1080 FILE *exp_file;
1081
1082 /*
1083  * Get the export list from one, currently open file
1084  */
1085 static void
1086 get_exportlist_one(void)
1087 {
1088         struct exportlist *ep, *ep2;
1089         struct grouplist *grp, *tgrp;
1090         struct exportlist **epp;
1091         struct dirlist *dirhead;
1092         struct statfs fsb;
1093         struct ucred anon;
1094         char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
1095         int len, has_host, exflags, got_nondir, dirplen, netgrp;
1096
1097         dirhead = NULL;
1098         while (get_line()) {
1099                 if (debug)
1100                         warnx("got line %s", line);
1101                 cp = line;
1102                 nextfield(&cp, &endcp);
1103                 if (*cp == '#')
1104                         goto nextline;
1105
1106                 /*
1107                  * Set defaults.
1108                  */
1109                 has_host = FALSE;
1110                 anon = def_anon;
1111                 exflags = MNT_EXPORTED;
1112                 got_nondir = 0;
1113                 opt_flags = 0;
1114                 ep = NULL;
1115
1116                 /*
1117                  * Create new exports list entry
1118                  */
1119                 len = endcp-cp;
1120                 tgrp = grp = get_grp();
1121                 while (len > 0) {
1122                         if (len > RPCMNT_NAMELEN) {
1123                             getexp_err(ep, tgrp);
1124                             goto nextline;
1125                         }
1126                         if (*cp == '-') {
1127                             if (ep == NULL) {
1128                                 getexp_err(ep, tgrp);
1129                                 goto nextline;
1130                             }
1131                             if (debug)
1132                                 warnx("doing opt %s", cp);
1133                             got_nondir = 1;
1134                             if (do_opt(&cp, &endcp, ep, grp, &has_host,
1135                                 &exflags, &anon)) {
1136                                 getexp_err(ep, tgrp);
1137                                 goto nextline;
1138                             }
1139                         } else if (*cp == '/') {
1140                             savedc = *endcp;
1141                             *endcp = '\0';
1142                             if (check_dirpath(cp) &&
1143                                 statfs(cp, &fsb) >= 0) {
1144                                 if (got_nondir) {
1145                                     syslog(LOG_ERR, "dirs must be first");
1146                                     getexp_err(ep, tgrp);
1147                                     goto nextline;
1148                                 }
1149                                 if (ep) {
1150                                     if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
1151                                         ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
1152                                         getexp_err(ep, tgrp);
1153                                         goto nextline;
1154                                     }
1155                                 } else {
1156                                     /*
1157                                      * See if this directory is already
1158                                      * in the list.
1159                                      */
1160                                     ep = ex_search(&fsb.f_fsid);
1161                                     if (ep == NULL) {
1162                                         ep = get_exp();
1163                                         ep->ex_fs = fsb.f_fsid;
1164                                         ep->ex_fsdir = (char *)
1165                                             malloc(strlen(fsb.f_mntonname) + 1);
1166                                         if (ep->ex_fsdir)
1167                                             strcpy(ep->ex_fsdir,
1168                                                 fsb.f_mntonname);
1169                                         else
1170                                             out_of_mem();
1171                                         if (debug)
1172                                                 warnx("making new ep fs=0x%x,0x%x",
1173                                                     fsb.f_fsid.val[0],
1174                                                     fsb.f_fsid.val[1]);
1175                                     } else if (debug)
1176                                         warnx("found ep fs=0x%x,0x%x",
1177                                             fsb.f_fsid.val[0],
1178                                             fsb.f_fsid.val[1]);
1179                                 }
1180
1181                                 /*
1182                                  * Add dirpath to export mount point.
1183                                  */
1184                                 dirp = add_expdir(&dirhead, cp, len);
1185                                 dirplen = len;
1186                             } else {
1187                                 getexp_err(ep, tgrp);
1188                                 goto nextline;
1189                             }
1190                             *endcp = savedc;
1191                         } else {
1192                             savedc = *endcp;
1193                             *endcp = '\0';
1194                             got_nondir = 1;
1195                             if (ep == NULL) {
1196                                 getexp_err(ep, tgrp);
1197                                 goto nextline;
1198                             }
1199
1200                             /*
1201                              * Get the host or netgroup.
1202                              */
1203                             setnetgrent(cp);
1204                             netgrp = getnetgrent(&hst, &usr, &dom);
1205                             do {
1206                                 if (has_host) {
1207                                     grp->gr_next = get_grp();
1208                                     grp = grp->gr_next;
1209                                 }
1210                                 if (netgrp) {
1211                                     if (hst == NULL) {
1212                                         syslog(LOG_ERR,
1213                                 "null hostname in netgroup %s, skipping", cp);
1214                                         grp->gr_type = GT_IGNORE;
1215                                     } else if (get_host(hst, grp, tgrp)) {
1216                                         syslog(LOG_ERR,
1217                         "bad host %s in netgroup %s, skipping", hst, cp);
1218                                         grp->gr_type = GT_IGNORE;
1219                                     }
1220                                 } else if (get_host(cp, grp, tgrp)) {
1221                                     syslog(LOG_ERR, "bad host %s, skipping", cp);
1222                                     grp->gr_type = GT_IGNORE;
1223                                 }
1224                                 has_host = TRUE;
1225                             } while (netgrp && getnetgrent(&hst, &usr, &dom));
1226                             endnetgrent();
1227                             *endcp = savedc;
1228                         }
1229                         cp = endcp;
1230                         nextfield(&cp, &endcp);
1231                         len = endcp - cp;
1232                 }
1233                 if (check_options(dirhead)) {
1234                         getexp_err(ep, tgrp);
1235                         goto nextline;
1236                 }
1237                 if (!has_host) {
1238                         grp->gr_type = GT_DEFAULT;
1239                         if (debug)
1240                                 warnx("adding a default entry");
1241
1242                 /*
1243                  * Don't allow a network export coincide with a list of
1244                  * host(s) on the same line.
1245                  */
1246                 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
1247                         syslog(LOG_ERR, "network/host conflict");
1248                         getexp_err(ep, tgrp);
1249                         goto nextline;
1250
1251                 /*
1252                  * If an export list was specified on this line, make sure
1253                  * that we have at least one valid entry, otherwise skip it.
1254                  */
1255                 } else {
1256                         grp = tgrp;
1257                         while (grp && grp->gr_type == GT_IGNORE)
1258                                 grp = grp->gr_next;
1259                         if (! grp) {
1260                             getexp_err(ep, tgrp);
1261                             goto nextline;
1262                         }
1263                 }
1264
1265                 /*
1266                  * Loop through hosts, pushing the exports into the kernel.
1267                  * After loop, tgrp points to the start of the list and
1268                  * grp points to the last entry in the list.
1269                  */
1270                 grp = tgrp;
1271                 do {
1272                         if (do_mount(ep, grp, exflags, &anon, dirp, dirplen,
1273                             &fsb)) {
1274                                 getexp_err(ep, tgrp);
1275                                 goto nextline;
1276                         }
1277                 } while (grp->gr_next && (grp = grp->gr_next));
1278
1279                 /*
1280                  * Success. Update the data structures.
1281                  */
1282                 if (has_host) {
1283                         hang_dirp(dirhead, tgrp, ep, opt_flags);
1284                         grp->gr_next = grphead;
1285                         grphead = tgrp;
1286                 } else {
1287                         hang_dirp(dirhead, NULL, ep,
1288                                 opt_flags);
1289                         free_grp(grp);
1290                 }
1291                 dirhead = NULL;
1292                 if ((ep->ex_flag & EX_LINKED) == 0) {
1293                         ep2 = exphead;
1294                         epp = &exphead;
1295
1296                         /*
1297                          * Insert in the list in alphabetical order.
1298                          */
1299                         while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
1300                                 epp = &ep2->ex_next;
1301                                 ep2 = ep2->ex_next;
1302                         }
1303                         if (ep2)
1304                                 ep->ex_next = ep2;
1305                         *epp = ep;
1306                         ep->ex_flag |= EX_LINKED;
1307                 }
1308 nextline:
1309                 if (dirhead) {
1310                         free_dir(dirhead);
1311                         dirhead = NULL;
1312                 }
1313         }
1314         fclose(exp_file);
1315 }
1316
1317 /*
1318  * Get the export list from all specified files
1319  */
1320 void
1321 get_exportlist(void)
1322 {
1323         struct exportlist *ep, *ep2;
1324         struct grouplist *grp, *tgrp;
1325         struct statfs *fsp, *mntbufp;
1326         struct vfsconf vfc;
1327         char *dirp;
1328         int num, i;
1329         int done;
1330
1331         dirp = NULL;
1332
1333         /*
1334          * First, get rid of the old list
1335          */
1336         ep = exphead;
1337         while (ep) {
1338                 ep2 = ep;
1339                 ep = ep->ex_next;
1340                 free_exp(ep2);
1341         }
1342         exphead = NULL;
1343
1344         grp = grphead;
1345         while (grp) {
1346                 tgrp = grp;
1347                 grp = grp->gr_next;
1348                 free_grp(tgrp);
1349         }
1350         grphead = NULL;
1351
1352         /*
1353          * And delete exports that are in the kernel for all local
1354          * filesystems.
1355          * XXX: Should know how to handle all local exportable filesystems.
1356          */
1357         num = getmntinfo(&mntbufp, MNT_NOWAIT);
1358         for (i = 0; i < num; i++) {
1359                 union {
1360                         struct ufs_args ua;
1361                         struct iso_args ia;
1362                         struct mfs_args ma;
1363                         struct msdosfs_args da;
1364                         struct ntfs_args na;
1365                 } targs;
1366                 struct export_args export;
1367
1368                 fsp = &mntbufp[i];
1369                 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) {
1370                         syslog(LOG_ERR, "getvfsbyname() failed for %s",
1371                             fsp->f_fstypename);
1372                         continue;
1373                 }
1374
1375                 /*
1376                  * Do not delete export for network filesystem by
1377                  * passing "export" arg to mount().
1378                  * It only makes sense to do this for local filesystems.
1379                  */
1380                 if (vfc.vfc_flags & VFCF_NETWORK)
1381                         continue;
1382
1383                 export.ex_flags = MNT_DELEXPORT;
1384                 if (mountctl(fsp->f_mntonname, MOUNTCTL_SET_EXPORT, -1,
1385                              &export, sizeof(export), NULL, 0) == 0) {
1386                 } else if (!strcmp(fsp->f_fstypename, "mfs") ||
1387                     !strcmp(fsp->f_fstypename, "ufs") ||
1388                     !strcmp(fsp->f_fstypename, "msdos") ||
1389                     !strcmp(fsp->f_fstypename, "ntfs") ||
1390                     !strcmp(fsp->f_fstypename, "cd9660")) {
1391                         bzero(&targs, sizeof targs);
1392                         targs.ua.fspec = NULL;
1393                         targs.ua.export.ex_flags = MNT_DELEXPORT;
1394                         if (mount(fsp->f_fstypename, fsp->f_mntonname,
1395                                   fsp->f_flags | MNT_UPDATE,
1396                                   (caddr_t)&targs) < 0)
1397                                 syslog(LOG_ERR, "can't delete exports for %s",
1398                                     fsp->f_mntonname);
1399                 }
1400         }
1401
1402         /*
1403          * Read in the exports file and build the list, calling
1404          * nmount() as we go along to push the export rules into the kernel.
1405          */
1406         done = 0;
1407         for (i = 0; exnames[i] != NULL; i++) {
1408                 if (debug)
1409                         warnx("reading exports from %s", exnames[i]);
1410                 if ((exp_file = fopen(exnames[i], "r")) == NULL) {
1411                         syslog(LOG_WARNING, "can't open %s", exnames[i]);
1412                         continue;
1413                 }
1414                 get_exportlist_one();
1415                 fclose(exp_file);
1416                 done++;
1417         }
1418         if (done == 0) {
1419                 syslog(LOG_ERR, "can't open any exports file");
1420                 exit(2);
1421         }
1422 }
1423
1424 /*
1425  * Allocate an export list element
1426  */
1427 struct exportlist *
1428 get_exp(void)
1429 {
1430         struct exportlist *ep;
1431
1432         ep = (struct exportlist *)malloc(sizeof (struct exportlist));
1433         if (ep == NULL)
1434                 out_of_mem();
1435         memset(ep, 0, sizeof(struct exportlist));
1436         return (ep);
1437 }
1438
1439 /*
1440  * Allocate a group list element
1441  */
1442 struct grouplist *
1443 get_grp(void)
1444 {
1445         struct grouplist *gp;
1446
1447         gp = (struct grouplist *)malloc(sizeof (struct grouplist));
1448         if (gp == NULL)
1449                 out_of_mem();
1450         memset(gp, 0, sizeof(struct grouplist));
1451         return (gp);
1452 }
1453
1454 /*
1455  * Clean up upon an error in get_exportlist().
1456  */
1457 void
1458 getexp_err(struct exportlist *ep, struct grouplist *grp)
1459 {
1460         struct grouplist *tgrp;
1461
1462         if (!(opt_flags & OP_QUIET))
1463                 syslog(LOG_ERR, "bad exports list line %s", line);
1464         if (ep && (ep->ex_flag & EX_LINKED) == 0)
1465                 free_exp(ep);
1466         while (grp) {
1467                 tgrp = grp;
1468                 grp = grp->gr_next;
1469                 free_grp(tgrp);
1470         }
1471 }
1472
1473 /*
1474  * Search the export list for a matching fs.
1475  */
1476 struct exportlist *
1477 ex_search(fsid_t *fsid)
1478 {
1479         struct exportlist *ep;
1480
1481         ep = exphead;
1482         while (ep) {
1483                 if (ep->ex_fs.val[0] == fsid->val[0] &&
1484                     ep->ex_fs.val[1] == fsid->val[1])
1485                         return (ep);
1486                 ep = ep->ex_next;
1487         }
1488         return (ep);
1489 }
1490
1491 /*
1492  * Add a directory path to the list.
1493  */
1494 char *
1495 add_expdir(struct dirlist **dpp, char *cp, int len)
1496 {
1497         struct dirlist *dp;
1498
1499         dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
1500         if (dp == NULL)
1501                 out_of_mem();
1502         dp->dp_left = *dpp;
1503         dp->dp_right = NULL;
1504         dp->dp_flag = 0;
1505         dp->dp_hosts = NULL;
1506         strcpy(dp->dp_dirp, cp);
1507         *dpp = dp;
1508         return (dp->dp_dirp);
1509 }
1510
1511 /*
1512  * Hang the dir list element off the dirpath binary tree as required
1513  * and update the entry for host.
1514  */
1515 void
1516 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
1517           int flags)
1518 {
1519         struct hostlist *hp;
1520         struct dirlist *dp2;
1521
1522         if (flags & OP_ALLDIRS) {
1523                 if (ep->ex_defdir)
1524                         free((caddr_t)dp);
1525                 else
1526                         ep->ex_defdir = dp;
1527                 if (grp == NULL) {
1528                         ep->ex_defdir->dp_flag |= DP_DEFSET;
1529                 } else while (grp) {
1530                         hp = get_ht();
1531                         hp->ht_grp = grp;
1532                         hp->ht_next = ep->ex_defdir->dp_hosts;
1533                         ep->ex_defdir->dp_hosts = hp;
1534                         grp = grp->gr_next;
1535                 }
1536         } else {
1537
1538                 /*
1539                  * Loop through the directories adding them to the tree.
1540                  */
1541                 while (dp) {
1542                         dp2 = dp->dp_left;
1543                         add_dlist(&ep->ex_dirl, dp, grp, flags);
1544                         dp = dp2;
1545                 }
1546         }
1547 }
1548
1549 /*
1550  * Traverse the binary tree either updating a node that is already there
1551  * for the new directory or adding the new node.
1552  */
1553 void
1554 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
1555           int flags)
1556 {
1557         struct dirlist *dp;
1558         struct hostlist *hp;
1559         int cmp;
1560
1561         dp = *dpp;
1562         if (dp) {
1563                 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1564                 if (cmp > 0) {
1565                         add_dlist(&dp->dp_left, newdp, grp, flags);
1566                         return;
1567                 } else if (cmp < 0) {
1568                         add_dlist(&dp->dp_right, newdp, grp, flags);
1569                         return;
1570                 } else
1571                         free((caddr_t)newdp);
1572         } else {
1573                 dp = newdp;
1574                 dp->dp_left = NULL;
1575                 *dpp = dp;
1576         }
1577         if (grp) {
1578
1579                 /*
1580                  * Hang all of the host(s) off of the directory point.
1581                  */
1582                 do {
1583                         hp = get_ht();
1584                         hp->ht_grp = grp;
1585                         hp->ht_next = dp->dp_hosts;
1586                         dp->dp_hosts = hp;
1587                         grp = grp->gr_next;
1588                 } while (grp);
1589         } else {
1590                 dp->dp_flag |= DP_DEFSET;
1591         }
1592 }
1593
1594 /*
1595  * Search for a dirpath on the export point.
1596  */
1597 struct dirlist *
1598 dirp_search(struct dirlist *dp, char *dirp)
1599 {
1600         int cmp;
1601
1602         if (dp) {
1603                 cmp = strcmp(dp->dp_dirp, dirp);
1604                 if (cmp > 0)
1605                         return (dirp_search(dp->dp_left, dirp));
1606                 else if (cmp < 0)
1607                         return (dirp_search(dp->dp_right, dirp));
1608                 else
1609                         return (dp);
1610         }
1611         return (dp);
1612 }
1613
1614 /*
1615  * Scan for a host match in a directory tree.
1616  */
1617 int
1618 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp,
1619          int *hostsetp)
1620 {
1621         struct hostlist *hp;
1622         struct grouplist *grp;
1623         struct addrinfo *ai;
1624
1625         if (dp) {
1626                 if (dp->dp_flag & DP_DEFSET)
1627                         *defsetp = dp->dp_flag;
1628                 hp = dp->dp_hosts;
1629                 while (hp) {
1630                         grp = hp->ht_grp;
1631                         switch (grp->gr_type) {
1632                         case GT_HOST:
1633                                 ai = grp->gr_ptr.gt_addrinfo;
1634                                 for (; ai; ai = ai->ai_next) {
1635                                         if (!sacmp(ai->ai_addr, saddr, NULL)) {
1636                                                 *hostsetp =
1637                                                     (hp->ht_flag | DP_HOSTSET);
1638                                                 return (1);
1639                                         }
1640                                 }
1641                                 break;
1642                         case GT_NET:
1643                                 if (!sacmp(saddr, (struct sockaddr *)
1644                                         &grp->gr_ptr.gt_net.nt_net,
1645                                         (struct sockaddr *)
1646                                         &grp->gr_ptr.gt_net.nt_mask)) {
1647                                         *hostsetp = (hp->ht_flag | DP_HOSTSET);
1648                                         return (1);
1649                                 }
1650                                 break;
1651                         }
1652                         hp = hp->ht_next;
1653                 }
1654         }
1655         return (0);
1656 }
1657
1658 /*
1659  * Scan tree for a host that matches the address.
1660  */
1661 int
1662 scan_tree(struct dirlist *dp, struct sockaddr *saddr)
1663 {
1664         int defset, hostset;
1665
1666         if (dp) {
1667                 if (scan_tree(dp->dp_left, saddr))
1668                         return (1);
1669                 if (chk_host(dp, saddr, &defset, &hostset))
1670                         return (1);
1671                 if (scan_tree(dp->dp_right, saddr))
1672                         return (1);
1673         }
1674         return (0);
1675 }
1676
1677 /*
1678  * Traverse the dirlist tree and free it up.
1679  */
1680 void
1681 free_dir(struct dirlist *dp)
1682 {
1683
1684         if (dp) {
1685                 free_dir(dp->dp_left);
1686                 free_dir(dp->dp_right);
1687                 free_host(dp->dp_hosts);
1688                 free((caddr_t)dp);
1689         }
1690 }
1691
1692 /*
1693  * Parse the option string and update fields.
1694  * Option arguments may either be -<option>=<value> or
1695  * -<option> <value>
1696  */
1697 int
1698 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
1699        int *has_hostp, int *exflagsp, struct ucred *cr)
1700 {
1701         char *cpoptarg, *cpoptend;
1702         char *cp, *endcp, *cpopt, savedc, savedc2;
1703         int allflag, usedarg;
1704
1705         savedc2 = '\0';
1706         cpopt = *cpp;
1707         cpopt++;
1708         cp = *endcpp;
1709         savedc = *cp;
1710         *cp = '\0';
1711         while (cpopt && *cpopt) {
1712                 allflag = 1;
1713                 usedarg = -2;
1714                 if ((cpoptend = strchr(cpopt, ','))) {
1715                         *cpoptend++ = '\0';
1716                         if ((cpoptarg = strchr(cpopt, '=')))
1717                                 *cpoptarg++ = '\0';
1718                 } else {
1719                         if ((cpoptarg = strchr(cpopt, '=')))
1720                                 *cpoptarg++ = '\0';
1721                         else {
1722                                 *cp = savedc;
1723                                 nextfield(&cp, &endcp);
1724                                 **endcpp = '\0';
1725                                 if (endcp > cp && *cp != '-') {
1726                                         cpoptarg = cp;
1727                                         savedc2 = *endcp;
1728                                         *endcp = '\0';
1729                                         usedarg = 0;
1730                                 }
1731                         }
1732                 }
1733                 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1734                         *exflagsp |= MNT_EXRDONLY;
1735                 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1736                     !(allflag = strcmp(cpopt, "mapall")) ||
1737                     !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1738                         usedarg++;
1739                         parsecred(cpoptarg, cr);
1740                         if (allflag == 0) {
1741                                 *exflagsp |= MNT_EXPORTANON;
1742                                 opt_flags |= OP_MAPALL;
1743                         } else
1744                                 opt_flags |= OP_MAPROOT;
1745                 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1746                         !strcmp(cpopt, "m"))) {
1747                         if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1748                                 syslog(LOG_ERR, "bad mask: %s", cpoptarg);
1749                                 return (1);
1750                         }
1751                         usedarg++;
1752                         opt_flags |= OP_MASK;
1753                 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1754                         !strcmp(cpopt, "n"))) {
1755                         if (strchr(cpoptarg, '/') != NULL) {
1756                                 if (debug)
1757                                         fprintf(stderr, "setting OP_MASKLEN\n");
1758                                 opt_flags |= OP_MASKLEN;
1759                         }
1760                         if (grp->gr_type != GT_NULL) {
1761                                 syslog(LOG_ERR, "network/host conflict");
1762                                 return (1);
1763                         } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1764                                 syslog(LOG_ERR, "bad net: %s", cpoptarg);
1765                                 return (1);
1766                         }
1767                         grp->gr_type = GT_NET;
1768                         *has_hostp = 1;
1769                         usedarg++;
1770                         opt_flags |= OP_NET;
1771                 } else if (!strcmp(cpopt, "alldirs")) {
1772                         opt_flags |= OP_ALLDIRS;
1773                 } else if (!strcmp(cpopt, "public")) {
1774                         *exflagsp |= MNT_EXPUBLIC;
1775                 } else if (!strcmp(cpopt, "webnfs")) {
1776                         *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
1777                         opt_flags |= OP_MAPALL;
1778                 } else if (cpoptarg && !strcmp(cpopt, "index")) {
1779                         ep->ex_indexfile = strdup(cpoptarg);
1780                 } else if (!strcmp(cpopt, "quiet")) {
1781                         opt_flags |= OP_QUIET;
1782                 } else {
1783                         syslog(LOG_ERR, "bad opt %s", cpopt);
1784                         return (1);
1785                 }
1786                 if (usedarg >= 0) {
1787                         *endcp = savedc2;
1788                         **endcpp = savedc;
1789                         if (usedarg > 0) {
1790                                 *cpp = cp;
1791                                 *endcpp = endcp;
1792                         }
1793                         return (0);
1794                 }
1795                 cpopt = cpoptend;
1796         }
1797         **endcpp = savedc;
1798         return (0);
1799 }
1800
1801 /*
1802  * Translate a character string to the corresponding list of network
1803  * addresses for a hostname.
1804  */
1805 int
1806 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp)
1807 {
1808         struct grouplist *checkgrp;
1809         struct addrinfo *ai, *tai, hints;
1810         int ecode;
1811         char host[NI_MAXHOST];
1812
1813         if (grp->gr_type != GT_NULL) {
1814                 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp);
1815                 return (1);
1816         }
1817         memset(&hints, 0, sizeof hints);
1818         hints.ai_flags = AI_CANONNAME;
1819         hints.ai_protocol = IPPROTO_UDP;
1820         ecode = getaddrinfo(cp, NULL, &hints, &ai);
1821         if (ecode != 0) {
1822                 syslog(LOG_ERR,"can't get address info for host %s", cp);
1823                 return 1;
1824         }
1825         grp->gr_ptr.gt_addrinfo = ai;
1826         while (ai != NULL) {
1827                 if (ai->ai_canonname == NULL) {
1828                         if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host,
1829                             sizeof host, NULL, 0, NI_NUMERICHOST) != 0)
1830                                 strlcpy(host, "?", sizeof(host));
1831                         ai->ai_canonname = strdup(host);
1832                         ai->ai_flags |= AI_CANONNAME;
1833                 }
1834                 if (debug)
1835                         fprintf(stderr, "got host %s\n", ai->ai_canonname);
1836                 /*
1837                  * Sanity check: make sure we don't already have an entry
1838                  * for this host in the grouplist.
1839                  */
1840                 for (checkgrp = tgrp; checkgrp != NULL;
1841                     checkgrp = checkgrp->gr_next) {
1842                         if (checkgrp->gr_type != GT_HOST)
1843                                 continue;
1844                         for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL;
1845                             tai = tai->ai_next) {
1846                                 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0)
1847                                         continue;
1848                                 if (debug)
1849                                         fprintf(stderr,
1850                                             "ignoring duplicate host %s\n",
1851                                             ai->ai_canonname);
1852                                 grp->gr_type = GT_IGNORE;
1853                                 return (0);
1854                         }
1855                 }
1856                 ai = ai->ai_next;
1857         }
1858         grp->gr_type = GT_HOST;
1859         return (0);
1860 }
1861
1862 /*
1863  * Free up an exports list component
1864  */
1865 void
1866 free_exp(struct exportlist *ep)
1867 {
1868
1869         if (ep->ex_defdir) {
1870                 free_host(ep->ex_defdir->dp_hosts);
1871                 free((caddr_t)ep->ex_defdir);
1872         }
1873         if (ep->ex_fsdir)
1874                 free(ep->ex_fsdir);
1875         if (ep->ex_indexfile)
1876                 free(ep->ex_indexfile);
1877         free_dir(ep->ex_dirl);
1878         free((caddr_t)ep);
1879 }
1880
1881 /*
1882  * Free hosts.
1883  */
1884 void
1885 free_host(struct hostlist *hp)
1886 {
1887         struct hostlist *hp2;
1888
1889         while (hp) {
1890                 hp2 = hp;
1891                 hp = hp->ht_next;
1892                 free((caddr_t)hp2);
1893         }
1894 }
1895
1896 struct hostlist *
1897 get_ht(void)
1898 {
1899         struct hostlist *hp;
1900
1901         hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1902         if (hp == NULL)
1903                 out_of_mem();
1904         hp->ht_next = NULL;
1905         hp->ht_flag = 0;
1906         return (hp);
1907 }
1908
1909 /*
1910  * Out of memory, fatal
1911  */
1912 void
1913 out_of_mem(void)
1914 {
1915
1916         syslog(LOG_ERR, "out of memory");
1917         exit(2);
1918 }
1919
1920 /*
1921  * Do the mount syscall with the update flag to push the export info into
1922  * the kernel.
1923  */
1924 int
1925 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
1926          struct ucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb)
1927 {
1928         struct statfs fsb1;
1929         struct addrinfo *ai;
1930         struct export_args *eap;
1931         char *cp = NULL;
1932         int done;
1933         char savedc = '\0';
1934         union {
1935                 struct ufs_args ua;
1936                 struct iso_args ia;
1937                 struct mfs_args ma;
1938                 struct msdosfs_args da;
1939                 struct ntfs_args na;
1940         } args;
1941
1942         bzero(&args, sizeof args);
1943         /* XXX, we assume that all xx_args look like ufs_args. */
1944         args.ua.fspec = 0;
1945         eap = &args.ua.export;
1946
1947         eap->ex_flags = exflags;
1948         eap->ex_anon = *anoncrp;
1949         eap->ex_indexfile = ep->ex_indexfile;
1950         if (grp->gr_type == GT_HOST)
1951                 ai = grp->gr_ptr.gt_addrinfo;
1952         else
1953                 ai = NULL;
1954         done = FALSE;
1955         while (!done) {
1956                 switch (grp->gr_type) {
1957                 case GT_HOST:
1958                         if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0)
1959                                 goto skip;
1960                         eap->ex_addr = ai->ai_addr;
1961                         eap->ex_addrlen = ai->ai_addrlen;
1962                         eap->ex_masklen = 0;
1963                         break;
1964                 case GT_NET:
1965                         if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 &&
1966                             have_v6 == 0)
1967                                 goto skip;
1968                         eap->ex_addr =
1969                             (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net;
1970                         eap->ex_addrlen = args.ua.export.ex_addr->sa_len;
1971                         eap->ex_mask =
1972                             (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask;
1973                         eap->ex_masklen = args.ua.export.ex_mask->sa_len;
1974                         break;
1975                 case GT_DEFAULT:
1976                         eap->ex_addr = NULL;
1977                         eap->ex_addrlen = 0;
1978                         eap->ex_mask = NULL;
1979                         eap->ex_masklen = 0;
1980                         break;
1981                 case GT_IGNORE:
1982                         return(0);
1983                         break;
1984                 default:
1985                         syslog(LOG_ERR, "bad grouptype");
1986                         if (cp)
1987                                 *cp = savedc;
1988                         return (1);
1989                 }
1990
1991                 /*
1992                  * XXX:
1993                  * Maybe I should just use the fsb->f_mntonname path instead
1994                  * of looping back up the dirp to the mount point??
1995                  * Also, needs to know how to export all types of local
1996                  * exportable filesystems and not just "ufs".
1997                  */
1998                 for (;;) {
1999                         int r;
2000
2001                         r = mountctl(fsb->f_mntonname, MOUNTCTL_SET_EXPORT,
2002                                      -1,
2003                                      &args.ua.export, sizeof(args.ua.export),
2004                                      NULL, 0);
2005                         if (r < 0 && errno == EOPNOTSUPP) {
2006                                 r = mount(fsb->f_fstypename, dirp,
2007                                           fsb->f_flags | MNT_UPDATE,
2008                                           (caddr_t)&args);
2009                         }
2010                         if (r >= 0)
2011                                 break;
2012                         if (cp)
2013                                 *cp-- = savedc;
2014                         else
2015                                 cp = dirp + dirplen - 1;
2016                         if (opt_flags & OP_QUIET)
2017                                 return (1);
2018                         if (errno == EPERM) {
2019                                 if (debug)
2020                                         warnx("can't change attributes for %s",
2021                                             dirp);
2022                                 syslog(LOG_ERR,
2023                                    "can't change attributes for %s", dirp);
2024                                 return (1);
2025                         }
2026                         if (opt_flags & OP_ALLDIRS) {
2027                                 if (errno == EINVAL)
2028                                         syslog(LOG_ERR,
2029                 "-alldirs requested but %s is not a filesystem mountpoint",
2030                                                 dirp);
2031                                 else
2032                                         syslog(LOG_ERR,
2033                                                 "could not remount %s: %m",
2034                                                 dirp);
2035                                 return (1);
2036                         }
2037                         /* back up over the last component */
2038                         while (*cp == '/' && cp > dirp)
2039                                 cp--;
2040                         while (*(cp - 1) != '/' && cp > dirp)
2041                                 cp--;
2042                         if (cp == dirp) {
2043                                 if (debug)
2044                                         warnx("mnt unsucc");
2045                                 syslog(LOG_ERR, "can't export %s", dirp);
2046                                 return (1);
2047                         }
2048                         savedc = *cp;
2049                         *cp = '\0';
2050                         /* Check that we're still on the same filesystem. */
2051                         if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid,
2052                             &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) {
2053                                 *cp = savedc;
2054                                 syslog(LOG_ERR, "can't export %s", dirp);
2055                                 return (1);
2056                         }
2057                 }
2058 skip:
2059                 if (ai != NULL)
2060                         ai = ai->ai_next;
2061                 if (ai == NULL)
2062                         done = TRUE;
2063         }
2064         if (cp)
2065                 *cp = savedc;
2066         return (0);
2067 }
2068
2069 /*
2070  * Translate a net address.
2071  *
2072  * If `maskflg' is nonzero, then `cp' is a netmask, not a network address.
2073  */
2074 int
2075 get_net(char *cp, struct netmsk *net, int maskflg)
2076 {
2077         struct netent *np = NULL;
2078         char *name, *p, *prefp;
2079         struct sockaddr_in sin;
2080         struct sockaddr *sa = NULL;
2081         struct addrinfo hints, *ai = NULL;
2082         char netname[NI_MAXHOST];
2083         long preflen;
2084
2085         p = prefp = NULL;
2086         if ((opt_flags & OP_MASKLEN) && !maskflg) {
2087                 p = strchr(cp, '/');
2088                 *p = '\0';
2089                 prefp = p + 1;
2090         }
2091
2092         /*
2093          * Check for a numeric address first. We wish to avoid
2094          * possible DNS lookups in getnetbyname().
2095          */
2096         if (isxdigit(*cp) || *cp == ':') {
2097                 memset(&hints, 0, sizeof hints);
2098                 /* Ensure the mask and the network have the same family. */
2099                 if (maskflg && (opt_flags & OP_NET))
2100                         hints.ai_family = net->nt_net.ss_family;
2101                 else if (!maskflg && (opt_flags & OP_HAVEMASK))
2102                         hints.ai_family = net->nt_mask.ss_family;
2103                 else
2104                         hints.ai_family = AF_UNSPEC;
2105                 hints.ai_flags = AI_NUMERICHOST;
2106                 if (getaddrinfo(cp, NULL, &hints, &ai) == 0)
2107                         sa = ai->ai_addr;
2108                 if (sa != NULL && ai->ai_family == AF_INET) {
2109                         /*
2110                          * The address in `cp' is really a network address, so
2111                          * use inet_network() to re-interpret this correctly.
2112                          * e.g. "127.1" means 127.1.0.0, not 127.0.0.1.
2113                          */
2114                         bzero(&sin, sizeof sin);
2115                         sin.sin_family = AF_INET;
2116                         sin.sin_len = sizeof sin;
2117                         sin.sin_addr = inet_makeaddr(inet_network(cp), 0);
2118                         if (debug)
2119                                 fprintf(stderr, "get_net: v4 addr %s\n",
2120                                     inet_ntoa(sin.sin_addr));
2121                         sa = (struct sockaddr *)&sin;
2122                 }
2123         }
2124         if (sa == NULL && (np = getnetbyname(cp)) != NULL) {
2125                 bzero(&sin, sizeof sin);
2126                 sin.sin_family = AF_INET;
2127                 sin.sin_len = sizeof sin;
2128                 sin.sin_addr = inet_makeaddr(np->n_net, 0);
2129                 sa = (struct sockaddr *)&sin;
2130         }
2131         if (sa == NULL)
2132                 goto fail;
2133
2134         if (maskflg) {
2135                 /* The specified sockaddr is a mask. */
2136                 if (checkmask(sa) != 0)
2137                         goto fail;
2138                 bcopy(sa, &net->nt_mask, sa->sa_len);
2139                 opt_flags |= OP_HAVEMASK;
2140         } else {
2141                 /* The specified sockaddr is a network address. */
2142                 bcopy(sa, &net->nt_net, sa->sa_len);
2143
2144                 /* Get a network name for the export list. */
2145                 if (np) {
2146                         name = np->n_name;
2147                 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname,
2148                         NULL, 0, NI_NUMERICHOST) == 0) {
2149                         name = netname;
2150                 } else {
2151                         goto fail;
2152                 }
2153                 if ((net->nt_name = strdup(name)) == NULL)
2154                         out_of_mem();
2155
2156                 /*
2157                  * Extract a mask from either a "/<masklen>" suffix, or
2158                  * from the class of an IPv4 address.
2159                  */
2160                 if (opt_flags & OP_MASKLEN) {
2161                         preflen = strtol(prefp, NULL, 10);
2162                         if (preflen < 0L || preflen == LONG_MAX)
2163                                 goto fail;
2164                         bcopy(sa, &net->nt_mask, sa->sa_len);
2165                         if (makemask(&net->nt_mask, (int)preflen) != 0)
2166                                 goto fail;
2167                         opt_flags |= OP_HAVEMASK;
2168                         *p = '/';
2169                 } else if (sa->sa_family == AF_INET &&
2170                     (opt_flags & OP_MASK) == 0) {
2171                         in_addr_t addr;
2172
2173                         addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
2174                         if (IN_CLASSA(addr))
2175                                 preflen = 8;
2176                         else if (IN_CLASSB(addr))
2177                                 preflen = 16;
2178                         else if (IN_CLASSC(addr))
2179                                 preflen = 24;
2180                         else if (IN_CLASSD(addr))
2181                                 preflen = 28;
2182                         else
2183                                 preflen = 32;   /* XXX */
2184
2185                         bcopy(sa, &net->nt_mask, sa->sa_len);
2186                         makemask(&net->nt_mask, (int)preflen);
2187                         opt_flags |= OP_HAVEMASK;
2188                 }
2189         }
2190
2191         if (ai)
2192                 freeaddrinfo(ai);
2193         return 0;
2194
2195 fail:
2196         if (ai)
2197                 freeaddrinfo(ai);
2198         return 1;
2199 }
2200
2201 /*
2202  * Parse out the next white space separated field
2203  */
2204 void
2205 nextfield(char **cp, char **endcp)
2206 {
2207         char *p;
2208
2209         p = *cp;
2210         while (*p == ' ' || *p == '\t')
2211                 p++;
2212         if (*p == '\n' || *p == '\0')
2213                 *cp = *endcp = p;
2214         else {
2215                 *cp = p++;
2216                 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
2217                         p++;
2218                 *endcp = p;
2219         }
2220 }
2221
2222 /*
2223  * Get an exports file line. Skip over blank lines and handle line
2224  * continuations.
2225  */
2226 int
2227 get_line(void)
2228 {
2229         char *p, *cp;
2230         size_t len;
2231         int totlen, cont_line;
2232
2233         /*
2234          * Loop around ignoring blank lines and getting all continuation lines.
2235          */
2236         p = line;
2237         totlen = 0;
2238         do {
2239                 if ((p = fgetln(exp_file, &len)) == NULL)
2240                         return (0);
2241                 cp = p + len - 1;
2242                 cont_line = 0;
2243                 while (cp >= p &&
2244                     (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
2245                         if (*cp == '\\')
2246                                 cont_line = 1;
2247                         cp--;
2248                         len--;
2249                 }
2250                 if (cont_line) {
2251                         *++cp = ' ';
2252                         len++;
2253                 }
2254                 if (linesize < len + totlen + 1) {
2255                         linesize = len + totlen + 1;
2256                         line = realloc(line, linesize);
2257                         if (line == NULL)
2258                                 out_of_mem();
2259                 }
2260                 memcpy(line + totlen, p, len);
2261                 totlen += len;
2262                 line[totlen] = '\0';
2263         } while (totlen == 0 || cont_line);
2264         return (1);
2265 }
2266
2267 /*
2268  * Parse a description of a credential.
2269  */
2270 void
2271 parsecred(char *namelist, struct ucred *cr)
2272 {
2273         char *name;
2274         int cnt;
2275         char *names;
2276         struct passwd *pw;
2277         struct group *gr;
2278         gid_t ngroups, groups[NGROUPS + 1];
2279
2280         /*
2281          * Set up the unprivileged user.
2282          */
2283         cr->cr_ref = 1;
2284         cr->cr_uid = -2;
2285         cr->cr_groups[0] = -2;
2286         cr->cr_ngroups = 1;
2287         /*
2288          * Get the user's password table entry.
2289          */
2290         names = strsep(&namelist, " \t\n");
2291         name = strsep(&names, ":");
2292         if (isdigit(*name) || *name == '-')
2293                 pw = getpwuid(atoi(name));
2294         else
2295                 pw = getpwnam(name);
2296         /*
2297          * Credentials specified as those of a user.
2298          */
2299         if (names == NULL) {
2300                 if (pw == NULL) {
2301                         syslog(LOG_ERR, "unknown user: %s", name);
2302                         return;
2303                 }
2304                 cr->cr_uid = pw->pw_uid;
2305                 ngroups = NGROUPS + 1;
2306                 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
2307                         syslog(LOG_ERR, "too many groups");
2308                 /*
2309                  * Compress out duplicate
2310                  */
2311                 cr->cr_ngroups = ngroups - 1;
2312                 cr->cr_groups[0] = groups[0];
2313                 for (cnt = 2; cnt < ngroups; cnt++)
2314                         cr->cr_groups[cnt - 1] = groups[cnt];
2315                 return;
2316         }
2317         /*
2318          * Explicit credential specified as a colon separated list:
2319          *      uid:gid:gid:...
2320          */
2321         if (pw != NULL)
2322                 cr->cr_uid = pw->pw_uid;
2323         else if (isdigit(*name) || *name == '-')
2324                 cr->cr_uid = atoi(name);
2325         else {
2326                 syslog(LOG_ERR, "unknown user: %s", name);
2327                 return;
2328         }
2329         cr->cr_ngroups = 0;
2330         while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
2331                 name = strsep(&names, ":");
2332                 if (isdigit(*name) || *name == '-') {
2333                         cr->cr_groups[cr->cr_ngroups++] = atoi(name);
2334                 } else {
2335                         if ((gr = getgrnam(name)) == NULL) {
2336                                 syslog(LOG_ERR, "unknown group: %s", name);
2337                                 continue;
2338                         }
2339                         cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
2340                 }
2341         }
2342         if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
2343                 syslog(LOG_ERR, "too many groups");
2344 }
2345
2346 #define STRSIZ  (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
2347 /*
2348  * Routines that maintain the remote mounttab
2349  */
2350 void
2351 get_mountlist(void)
2352 {
2353         struct mountlist *mlp, **mlpp;
2354         char *host, *dirp, *cp;
2355         char str[STRSIZ];
2356         FILE *mlfile;
2357
2358         if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
2359                 if (errno == ENOENT)
2360                         return;
2361                 else {
2362                         syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
2363                         return;
2364                 }
2365         }
2366         mlpp = &mlhead;
2367         while (fgets(str, STRSIZ, mlfile) != NULL) {
2368                 cp = str;
2369                 host = strsep(&cp, " \t\n");
2370                 dirp = strsep(&cp, " \t\n");
2371                 if (host == NULL || dirp == NULL)
2372                         continue;
2373                 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2374                 if (mlp == NULL)
2375                         out_of_mem();
2376                 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN);
2377                 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2378                 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2379                 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2380                 mlp->ml_next = NULL;
2381                 *mlpp = mlp;
2382                 mlpp = &mlp->ml_next;
2383         }
2384         fclose(mlfile);
2385 }
2386
2387 void
2388 del_mlist(char *hostp, char *dirp)
2389 {
2390         struct mountlist *mlp, **mlpp;
2391         struct mountlist *mlp2;
2392         FILE *mlfile;
2393         int fnd = 0;
2394
2395         mlpp = &mlhead;
2396         mlp = mlhead;
2397         while (mlp) {
2398                 if (!strcmp(mlp->ml_host, hostp) &&
2399                     (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
2400                         fnd = 1;
2401                         mlp2 = mlp;
2402                         *mlpp = mlp = mlp->ml_next;
2403                         free((caddr_t)mlp2);
2404                 } else {
2405                         mlpp = &mlp->ml_next;
2406                         mlp = mlp->ml_next;
2407                 }
2408         }
2409         if (fnd) {
2410                 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
2411                         syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
2412                         return;
2413                 }
2414                 mlp = mlhead;
2415                 while (mlp) {
2416                         fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2417                         mlp = mlp->ml_next;
2418                 }
2419                 fclose(mlfile);
2420         }
2421 }
2422
2423 void
2424 add_mlist(char *hostp, char *dirp)
2425 {
2426         struct mountlist *mlp, **mlpp;
2427         FILE *mlfile;
2428
2429         mlpp = &mlhead;
2430         mlp = mlhead;
2431         while (mlp) {
2432                 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
2433                         return;
2434                 mlpp = &mlp->ml_next;
2435                 mlp = mlp->ml_next;
2436         }
2437         mlp = (struct mountlist *)malloc(sizeof (*mlp));
2438         if (mlp == NULL)
2439                 out_of_mem();
2440         strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
2441         mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2442         strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2443         mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2444         mlp->ml_next = NULL;
2445         *mlpp = mlp;
2446         if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
2447                 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
2448                 return;
2449         }
2450         fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2451         fclose(mlfile);
2452 }
2453
2454 /*
2455  * Free up a group list.
2456  */
2457 void
2458 free_grp(struct grouplist *grp)
2459 {
2460         if (grp->gr_type == GT_HOST) {
2461                 if (grp->gr_ptr.gt_addrinfo != NULL)
2462                         freeaddrinfo(grp->gr_ptr.gt_addrinfo);
2463         } else if (grp->gr_type == GT_NET) {
2464                 if (grp->gr_ptr.gt_net.nt_name)
2465                         free(grp->gr_ptr.gt_net.nt_name);
2466         }
2467         free((caddr_t)grp);
2468 }
2469
2470 #ifdef DEBUG
2471 void
2472 SYSLOG(int pri, const char *fmt, ...)
2473 {
2474         va_list ap;
2475
2476         va_start(ap, fmt);
2477         vfprintf(stderr, fmt, ap);
2478         va_end(ap);
2479 }
2480 #endif /* DEBUG */
2481
2482 /*
2483  * Check options for consistency.
2484  */
2485 int
2486 check_options(struct dirlist *dp)
2487 {
2488
2489         if (dp == NULL)
2490             return (1);
2491         if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) {
2492                 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive");
2493                 return (1);
2494         }
2495         if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
2496                 syslog(LOG_ERR, "-mask requires -network");
2497                 return (1);
2498         }
2499         if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) {
2500                 syslog(LOG_ERR, "-network requires mask specification");
2501                 return (1);
2502         }
2503         if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) {
2504                 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive");
2505                 return (1);
2506         }
2507         if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
2508             syslog(LOG_ERR, "-alldirs has multiple directories");
2509             return (1);
2510         }
2511         return (0);
2512 }
2513
2514 /*
2515  * Check an absolute directory path for any symbolic links. Return true
2516  */
2517 int
2518 check_dirpath(char *dirp)
2519 {
2520         char *cp;
2521         int ret = 1;
2522         struct stat sb;
2523
2524         cp = dirp + 1;
2525         while (*cp && ret) {
2526                 if (*cp == '/') {
2527                         *cp = '\0';
2528                         if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2529                                 ret = 0;
2530                         *cp = '/';
2531                 }
2532                 cp++;
2533         }
2534         if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2535                 ret = 0;
2536         return (ret);
2537 }
2538
2539 /*
2540  * Make a netmask according to the specified prefix length. The ss_family
2541  * and other non-address fields must be initialised before calling this.
2542  */
2543 int
2544 makemask(struct sockaddr_storage *ssp, int bitlen)
2545 {
2546         u_char *p;
2547         int bits, i, len;
2548
2549         if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL)
2550                 return (-1);
2551         if (bitlen > len * CHAR_BIT)
2552                 return (-1);
2553         for (i = 0; i < len; i++) {
2554                 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen;
2555                 *p++ = (1 << bits) - 1;
2556                 bitlen -= bits;
2557         }
2558         return 0;
2559 }
2560
2561 /*
2562  * Check that the sockaddr is a valid netmask. Returns 0 if the mask
2563  * is acceptable (i.e. of the form 1...10....0).
2564  */
2565 int
2566 checkmask(struct sockaddr *sa)
2567 {
2568         u_char *mask;
2569         int i, len;
2570
2571         if ((mask = sa_rawaddr(sa, &len)) == NULL)
2572                 return (-1);
2573
2574         for (i = 0; i < len; i++)
2575                 if (mask[i] != 0xff)
2576                         break;
2577         if (i < len) {
2578                 if (~mask[i] & (u_char)(~mask[i] + 1))
2579                         return (-1);
2580                 i++;
2581         }
2582         for (; i < len; i++)
2583                 if (mask[i] != 0)
2584                         return (-1);
2585         return (0);
2586 }
2587
2588 /*
2589  * Compare two sockaddrs according to a specified mask. Return zero if
2590  * `sa1' matches `sa2' when filtered by the netmask in `samask'.
2591  * If samask is NULL, perform a full comparision.
2592  */
2593 int
2594 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask)
2595 {
2596         unsigned char *p1, *p2, *mask;
2597         int len, i;
2598
2599         if (sa1->sa_family != sa2->sa_family ||
2600             (p1 = sa_rawaddr(sa1, &len)) == NULL ||
2601             (p2 = sa_rawaddr(sa2, NULL)) == NULL)
2602                 return (1);
2603
2604         switch (sa1->sa_family) {
2605         case AF_INET6:
2606                 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
2607                     ((struct sockaddr_in6 *)sa2)->sin6_scope_id)
2608                         return (1);
2609                 break;
2610         }
2611
2612         /* Simple binary comparison if no mask specified. */
2613         if (samask == NULL)
2614                 return (memcmp(p1, p2, len));
2615
2616         /* Set up the mask, and do a mask-based comparison. */
2617         if (sa1->sa_family != samask->sa_family ||
2618             (mask = sa_rawaddr(samask, NULL)) == NULL)
2619                 return (1);
2620
2621         for (i = 0; i < len; i++)
2622                 if ((p1[i] & mask[i]) != (p2[i] & mask[i]))
2623                         return (1);
2624         return (0);
2625 }
2626
2627 /*
2628  * Return a pointer to the part of the sockaddr that contains the
2629  * raw address, and set *nbytes to its length in bytes. Returns
2630  * NULL if the address family is unknown.
2631  */
2632 void *
2633 sa_rawaddr(struct sockaddr *sa, int *nbytes) {
2634         void *p;
2635         int len;
2636
2637         switch (sa->sa_family) {
2638         case AF_INET:
2639                 len = sizeof(((struct sockaddr_in *)sa)->sin_addr);
2640                 p = &((struct sockaddr_in *)sa)->sin_addr;
2641                 break;
2642         case AF_INET6:
2643                 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr);
2644                 p = &((struct sockaddr_in6 *)sa)->sin6_addr;
2645                 break;
2646         default:
2647                 p = NULL;
2648                 len = 0;
2649         }
2650
2651         if (nbytes != NULL)
2652                 *nbytes = len;
2653         return (p);
2654 }
2655
2656 void
2657 huphandler(int sig)
2658 {
2659         got_sighup = 1;
2660 }
2661
2662 void terminate(int sig)
2663 {
2664         pidfile_remove(pfh);
2665         rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
2666         rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
2667         exit (0);
2668 }