sbin/nfsd/nfsd.c

   1 /*
   2  * Copyright (c) 1989, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * 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. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef lint
  38 static const char copyright[] =
  39 "@(#) Copyright (c) 1989, 1993, 1994\n\
  40         The Regents of the University of California.  All rights reserved.\n";
  41 #endif not lint
  42
  43 #ifndef lint
  44 #if 0
  45 static char sccsid[] = "@(#)nfsd.c      8.9 (Berkeley) 3/29/95";
  46 #endif
  47 static const char rcsid[] =
  48   "$FreeBSD: src/sbin/nfsd/nfsd.c,v 1.15.2.1 2000/09/16 22:52:23 brian Exp $";
  49 #endif not lint
  50
  51 #include <sys/param.h>
  52 #include <sys/syslog.h>
  53 #include <sys/wait.h>
  54 #include <sys/mount.h>
  55
  56 #include <rpc/rpc.h>
  57 #include <rpc/pmap_clnt.h>
  58
  59 #include <netdb.h>
  60 #include <arpa/inet.h>
  61 #ifdef ISO
  62 #include <netiso/iso.h>
  63 #endif
  64 #include <nfs/rpcv2.h>
  65 #include <nfs/nfsproto.h>
  66 #include <nfs/nfs.h>
  67
  68 #ifdef NFSKERB
  69 #include <kerberosIV/des.h>
  70 #include <kerberosIV/krb.h>
  71 #endif
  72
  73 #include <err.h>
  74 #include <errno.h>
  75 #include <stdio.h>
  76 #include <stdlib.h>
  77 #include <strings.h>
  78 #include <unistd.h>
  79
  80 /* Global defs */
  81 #ifdef DEBUG
  82 #define syslog(e, s)    fprintf(stderr,(s))
  83 int     debug = 1;
  84 #else
  85 int     debug = 0;
  86 #endif
  87
  88 struct  nfsd_srvargs nsd;
  89 #ifdef OLD_SETPROCTITLE
  90 char    **Argv = NULL;          /* pointer to argument vector */
  91 char    *LastArg = NULL;        /* end of argv */
  92 #endif
  93
  94 #ifdef NFSKERB
  95 char            lnam[ANAME_SZ];
  96 KTEXT_ST        kt;
  97 AUTH_DAT        kauth;
  98 char            inst[INST_SZ];
  99 struct nfsrpc_fullblock kin, kout;
 100 struct nfsrpc_fullverf kverf;
 101 NFSKERBKEY_T    kivec;
 102 struct timeval  ktv;
 103 NFSKERBKEYSCHED_T kerb_keysched;
 104 #endif
 105
 106 void    nonfs __P((int));
 107 void    reapchild __P((int));
 108 void    setbindhost __P((struct sockaddr_in *ia, const char *bindhost));
 109 #ifdef OLD_SETPROCTITLE
 110 #ifdef __FreeBSD__
 111 void    setproctitle __P((char *));
 112 #endif
 113 #endif
 114 void    usage __P((void));
 115
 116 /*
 117  * Nfs server daemon mostly just a user context for nfssvc()
 118  *
 119  * 1 - do file descriptor and signal cleanup
 120  * 2 - fork the nfsd(s)
 121  * 3 - create server socket(s)
 122  * 4 - register socket with portmap
 123  *
 124  * For connectionless protocols, just pass the socket into the kernel via.
 125  * nfssvc().
 126  * For connection based sockets, loop doing accepts. When you get a new
 127  * socket from accept, pass the msgsock into the kernel via. nfssvc().
 128  * The arguments are:
 129  *      -c - support iso cltp clients
 130  *      -r - reregister with portmapper
 131  *      -t - support tcp nfs clients
 132  *      -u - support udp nfs clients
 133  * followed by "n" which is the number of nfsds' to fork off
 134  */
 135 int
 136 main(argc, argv, envp)
 137         int argc;
 138         char *argv[], *envp[];
 139 {
 140         struct nfsd_args nfsdargs;
 141         struct sockaddr_in inetaddr, inetpeer;
 142 #ifdef ISO
 143         struct sockaddr_iso isoaddr, isopeer;
 144         char *cp;
 145 #endif
 146         fd_set ready, sockbits;
 147         int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock;
 148         int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock;
 149         int tp4cnt, tp4flag, tpipcnt, tpipflag, udpflag;
 150         int bindhostc = 0, bindanyflag;
 151         char **bindhost = NULL;
 152 #ifdef notyet
 153         int tp4sock, tpipsock;
 154 #endif
 155 #ifdef NFSKERB
 156         struct group *grp;
 157         struct passwd *pwd;
 158         struct ucred *cr;
 159         struct timeval ktv;
 160         char **cpp;
 161 #endif
 162 #ifdef __FreeBSD__
 163         struct vfsconf vfc;
 164         int error;
 165
 166         error = getvfsbyname("nfs", &vfc);
 167         if (error && vfsisloadable("nfs")) {
 168                 if (vfsload("nfs"))
 169                         err(1, "vfsload(nfs)");
 170                 endvfsent();    /* flush cache */
 171                 error = getvfsbyname("nfs", &vfc);
 172         }
 173         if (error)
 174                 errx(1, "NFS is not available in the running kernel");
 175 #endif
 176
 177 #ifdef OLD_SETPROCTITLE
 178         /* Save start and extent of argv for setproctitle. */
 179         Argv = argv;
 180         if (envp == 0 || *envp == 0)
 181                 envp = argv;
 182         while (*envp)
 183                 envp++;
 184         LastArg = envp[-1] + strlen(envp[-1]);
 185 #endif
 186
 187 #define MAXNFSDCNT      20
 188 #define DEFNFSDCNT       4
 189         nfsdcnt = DEFNFSDCNT;
 190         cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
 191         bindanyflag = tpipflag = udpflag = 0;
 192 #ifdef ISO
 193 #define GETOPT  "ach:n:rtu"
 194 #define USAGE   "[-acrtu] [-n num_servers] [-h bindip]"
 195 #else
 196 #define GETOPT  "ah:n:rtu"
 197 #define USAGE   "[-artu] [-n num_servers] [-h bindip]"
 198 #endif
 199         while ((ch = getopt(argc, argv, GETOPT)) != -1)
 200                 switch (ch) {
 201                 case 'a':
 202                         bindanyflag = 1;
 203                         break;
 204                 case 'n':
 205                         nfsdcnt = atoi(optarg);
 206                         if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 207                                 warnx("nfsd count %d; reset to %d", nfsdcnt,
 208                                     DEFNFSDCNT);
 209                                 nfsdcnt = DEFNFSDCNT;
 210                         }
 211                         break;
 212                 case 'h':
 213                         bindhostc++;
 214                         bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 215                         if (bindhost == NULL)
 216                                 errx(1, "Out of memory");
 217                         bindhost[bindhostc-1] = strdup(optarg);
 218                         if (bindhost[bindhostc-1] == NULL)
 219                                 errx(1, "Out of memory");
 220                         break;
 221                 case 'r':
 222                         reregister = 1;
 223                         break;
 224                 case 't':
 225                         tcpflag = 1;
 226                         break;
 227                 case 'u':
 228                         udpflag = 1;
 229                         break;
 230 #ifdef ISO
 231                 case 'c':
 232                         cltpflag = 1;
 233                         break;
 234 #ifdef notyet
 235                 case 'i':
 236                         tp4cnt = 1;
 237                         break;
 238                 case 'p':
 239                         tpipcnt = 1;
 240                         break;
 241 #endif /* notyet */
 242 #endif /* ISO */
 243                 default:
 244                 case '?':
 245                         usage();
 246                 };
 247         if (!tcpflag && !udpflag)
 248                 udpflag = 1;
 249         argv += optind;
 250         argc -= optind;
 251
 252         /*
 253          * XXX
 254          * Backward compatibility, trailing number is the count of daemons.
 255          */
 256         if (argc > 1)
 257                 usage();
 258         if (argc == 1) {
 259                 nfsdcnt = atoi(argv[0]);
 260                 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 261                         warnx("nfsd count %d; reset to %d", nfsdcnt,
 262                             DEFNFSDCNT);
 263                         nfsdcnt = DEFNFSDCNT;
 264                 }
 265         }
 266
 267         if (bindhostc == 0 || bindanyflag) {
 268                 bindhostc++;
 269                 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 270                 if (bindhost == NULL)
 271                         errx(1, "Out of memory");
 272                 bindhost[bindhostc-1] = strdup("*");
 273                 if (bindhost[bindhostc-1] == NULL)
 274                         errx(1, "Out of memory");
 275         }
 276
 277         if (debug == 0) {
 278                 daemon(0, 0);
 279                 (void)signal(SIGHUP, SIG_IGN);
 280                 (void)signal(SIGINT, SIG_IGN);
 281                 (void)signal(SIGQUIT, SIG_IGN);
 282                 (void)signal(SIGSYS, nonfs);
 283                 (void)signal(SIGTERM, SIG_IGN);
 284         }
 285         (void)signal(SIGCHLD, reapchild);
 286
 287         if (reregister) {
 288                 if (udpflag &&
 289                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 290                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)))
 291                         err(1, "can't register with portmap for UDP");
 292                 if (tcpflag &&
 293                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 294                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)))
 295                         err(1, "can't register with portmap for TCP");
 296                 exit(0);
 297         }
 298         openlog("nfsd:", LOG_PID, LOG_DAEMON);
 299
 300         for (i = 0; i < nfsdcnt; i++) {
 301                 switch (fork()) {
 302                 case -1:
 303                         syslog(LOG_ERR, "fork: %m");
 304                         exit (1);
 305                 case 0:
 306                         break;
 307                 default:
 308                         continue;
 309                 }
 310
 311                 setproctitle("server");
 312                 nfssvc_flag = NFSSVC_NFSD;
 313                 nsd.nsd_nfsd = NULL;
 314 #ifdef NFSKERB
 315                 if (sizeof (struct nfsrpc_fullverf) != RPCX_FULLVERF ||
 316                     sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK)
 317                     syslog(LOG_ERR, "Yikes NFSKERB structs not packed!");
 318                 nsd.nsd_authstr = (u_char *)&kt;
 319                 nsd.nsd_authlen = sizeof (kt);
 320                 nsd.nsd_verfstr = (u_char *)&kverf;
 321                 nsd.nsd_verflen = sizeof (kverf);
 322 #endif
 323                 while (nfssvc(nfssvc_flag, &nsd) < 0) {
 324                         if (errno != ENEEDAUTH) {
 325                                 syslog(LOG_ERR, "nfssvc: %m");
 326                                 exit(1);
 327                         }
 328                         nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL;
 329 #ifdef NFSKERB
 330                         /*
 331                          * Get the Kerberos ticket out of the authenticator
 332                          * verify it and convert the principal name to a user
 333                          * name. The user name is then converted to a set of
 334                          * user credentials via the password and group file.
 335                          * Finally, decrypt the timestamp and validate it.
 336                          * For more info see the IETF Draft "Authentication
 337                          * in ONC RPC".
 338                          */
 339                         kt.length = ntohl(kt.length);
 340                         if (gettimeofday(&ktv, (struct timezone *)0) == 0 &&
 341                             kt.length > 0 && kt.length <=
 342                             (RPCAUTH_MAXSIZ - 3 * NFSX_UNSIGNED)) {
 343                             kin.w1 = NFS_KERBW1(kt);
 344                             kt.mbz = 0;
 345                             (void)strcpy(inst, "*");
 346                             if (krb_rd_req(&kt, NFS_KERBSRV,
 347                                 inst, nsd.nsd_haddr, &kauth, "") == RD_AP_OK &&
 348                                 krb_kntoln(&kauth, lnam) == KSUCCESS &&
 349                                 (pwd = getpwnam(lnam)) != NULL) {
 350                                 cr = &nsd.nsd_cr;
 351                                 cr->cr_uid = pwd->pw_uid;
 352                                 cr->cr_groups[0] = pwd->pw_gid;
 353                                 cr->cr_ngroups = 1;
 354                                 setgrent();
 355                                 while ((grp = getgrent()) != NULL) {
 356                                         if (grp->gr_gid == cr->cr_groups[0])
 357                                                 continue;
 358                                         for (cpp = grp->gr_mem;
 359                                             *cpp != NULL; ++cpp)
 360                                                 if (!strcmp(*cpp, lnam))
 361                                                         break;
 362                                         if (*cpp == NULL)
 363                                                 continue;
 364                                         cr->cr_groups[cr->cr_ngroups++]
 365                                             = grp->gr_gid;
 366                                         if (cr->cr_ngroups == NGROUPS)
 367                                                 break;
 368                                 }
 369                                 endgrent();
 370
 371                                 /*
 372                                  * Get the timestamp verifier out of the
 373                                  * authenticator and verifier strings.
 374                                  */
 375                                 kin.t1 = kverf.t1;
 376                                 kin.t2 = kverf.t2;
 377                                 kin.w2 = kverf.w2;
 378                                 bzero((caddr_t)kivec, sizeof (kivec));
 379                                 bcopy((caddr_t)kauth.session,
 380                                     (caddr_t)nsd.nsd_key,sizeof(kauth.session));
 381
 382                                 /*
 383                                  * Decrypt the timestamp verifier in CBC mode.
 384                                  */
 385                                 XXX
 386
 387                                 /*
 388                                  * Validate the timestamp verifier, to
 389                                  * check that the session key is ok.
 390                                  */
 391                                 nsd.nsd_timestamp.tv_sec = ntohl(kout.t1);
 392                                 nsd.nsd_timestamp.tv_usec = ntohl(kout.t2);
 393                                 nsd.nsd_ttl = ntohl(kout.w1);
 394                                 if ((nsd.nsd_ttl - 1) == ntohl(kout.w2))
 395                                     nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN;
 396                         }
 397 #endif /* NFSKERB */
 398                 }
 399                 exit(0);
 400         }
 401
 402         /* If we are serving udp, set up the socket. */
 403         for (i = 0; udpflag && i < bindhostc; i++) {
 404                 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 405                         syslog(LOG_ERR, "can't create udp socket");
 406                         exit(1);
 407                 }
 408                 setbindhost(&inetaddr, bindhost[i]);
 409                 if (bind(sock,
 410                     (struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
 411                         syslog(LOG_ERR, "can't bind udp addr %s: %m", bindhost[i]);
 412                         exit(1);
 413                 }
 414                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 415                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)) {
 416                         syslog(LOG_ERR, "can't register with udp portmap");
 417                         exit(1);
 418                 }
 419                 nfsdargs.sock = sock;
 420                 nfsdargs.name = NULL;
 421                 nfsdargs.namelen = 0;
 422                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 423                         syslog(LOG_ERR, "can't Add UDP socket");
 424                         exit(1);
 425                 }
 426                 (void)close(sock);
 427         }
 428
 429 #ifdef ISO
 430         /* If we are serving cltp, set up the socket. */
 431         if (cltpflag) {
 432                 if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) {
 433                         syslog(LOG_ERR, "can't create cltp socket");
 434                         exit(1);
 435                 }
 436                 memset(&isoaddr, 0, sizeof(isoaddr));
 437                 isoaddr.siso_family = AF_ISO;
 438                 isoaddr.siso_tlen = 2;
 439                 cp = TSEL(&isoaddr);
 440                 *cp++ = (NFS_PORT >> 8);
 441                 *cp = (NFS_PORT & 0xff);
 442                 isoaddr.siso_len = sizeof(isoaddr);
 443                 if (bind(sock,
 444                     (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) {
 445                         syslog(LOG_ERR, "can't bind cltp addr");
 446                         exit(1);
 447                 }
 448 #ifdef notyet
 449                 /*
 450                  * XXX
 451                  * Someday this should probably use "rpcbind", the son of
 452                  * portmap.
 453                  */
 454                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
 455                         syslog(LOG_ERR, "can't register with udp portmap");
 456                         exit(1);
 457                 }
 458 #endif /* notyet */
 459                 nfsdargs.sock = sock;
 460                 nfsdargs.name = NULL;
 461                 nfsdargs.namelen = 0;
 462                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 463                         syslog(LOG_ERR, "can't add UDP socket");
 464                         exit(1);
 465                 }
 466                 close(sock);
 467         }
 468 #endif /* ISO */
 469
 470         /* Now set up the master server socket waiting for tcp connections. */
 471         on = 1;
 472         FD_ZERO(&sockbits);
 473         connect_type_cnt = 0;
 474         for (i = 0; tcpflag && i < bindhostc; i++) {
 475                 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 476                         syslog(LOG_ERR, "can't create tcp socket");
 477                         exit(1);
 478                 }
 479                 if (setsockopt(tcpsock,
 480                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 481                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 482                 setbindhost(&inetaddr, bindhost[i]);
 483                 if (bind(tcpsock,
 484                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 485                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 486                         exit(1);
 487                 }
 488                 if (listen(tcpsock, 5) < 0) {
 489                         syslog(LOG_ERR, "listen failed");
 490                         exit(1);
 491                 }
 492                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 493                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)) {
 494                         syslog(LOG_ERR, "can't register tcp with portmap");
 495                         exit(1);
 496                 }
 497                 FD_SET(tcpsock, &sockbits);
 498                 maxsock = tcpsock;
 499                 connect_type_cnt++;
 500         }
 501
 502 #ifdef notyet
 503         /* Now set up the master server socket waiting for tp4 connections. */
 504         if (tp4flag) {
 505                 if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) {
 506                         syslog(LOG_ERR, "can't create tp4 socket");
 507                         exit(1);
 508                 }
 509                 if (setsockopt(tp4sock,
 510                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 511                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 512                 memset(&isoaddr, 0, sizeof(isoaddr));
 513                 isoaddr.siso_family = AF_ISO;
 514                 isoaddr.siso_tlen = 2;
 515                 cp = TSEL(&isoaddr);
 516                 *cp++ = (NFS_PORT >> 8);
 517                 *cp = (NFS_PORT & 0xff);
 518                 isoaddr.siso_len = sizeof(isoaddr);
 519                 if (bind(tp4sock,
 520                     (struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) {
 521                         syslog(LOG_ERR, "can't bind tp4 addr");
 522                         exit(1);
 523                 }
 524                 if (listen(tp4sock, 5) < 0) {
 525                         syslog(LOG_ERR, "listen failed");
 526                         exit(1);
 527                 }
 528                 /*
 529                  * XXX
 530                  * Someday this should probably use "rpcbind", the son of
 531                  * portmap.
 532                  */
 533                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 534                         syslog(LOG_ERR, "can't register tcp with portmap");
 535                         exit(1);
 536                 }
 537                 FD_SET(tp4sock, &sockbits);
 538                 maxsock = tp4sock;
 539                 connect_type_cnt++;
 540         }
 541
 542         /* Now set up the master server socket waiting for tpip connections. */
 543         for (i = 0; tpipflag && i < bindhostc; i++) {
 544                 if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
 545                         syslog(LOG_ERR, "can't create tpip socket");
 546                         exit(1);
 547                 }
 548                 if (setsockopt(tpipsock,
 549                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 550                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 551                 setbindhost(&inetaddr, bindhost[i]);
 552                 if (bind(tpipsock,
 553                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 554                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 555                         exit(1);
 556                 }
 557                 if (listen(tpipsock, 5) < 0) {
 558                         syslog(LOG_ERR, "listen failed");
 559                         exit(1);
 560                 }
 561                 /*
 562                  * XXX
 563                  * Someday this should probably use "rpcbind", the son of
 564                  * portmap.
 565                  */
 566                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 567                         syslog(LOG_ERR, "can't register tcp with portmap");
 568                         exit(1);
 569                 }
 570                 FD_SET(tpipsock, &sockbits);
 571                 maxsock = tpipsock;
 572                 connect_type_cnt++;
 573         }
 574 #endif /* notyet */
 575
 576         if (connect_type_cnt == 0)
 577                 exit(0);
 578
 579         setproctitle("master");
 580
 581         /*
 582          * Loop forever accepting connections and passing the sockets
 583          * into the kernel for the mounts.
 584          */
 585         for (;;) {
 586                 ready = sockbits;
 587                 if (connect_type_cnt > 1) {
 588                         if (select(maxsock + 1,
 589                             &ready, NULL, NULL, NULL) < 1) {
 590                                 syslog(LOG_ERR, "select failed: %m");
 591                                 exit(1);
 592                         }
 593                 }
 594                 if (tcpflag && FD_ISSET(tcpsock, &ready)) {
 595                         len = sizeof(inetpeer);
 596                         if ((msgsock = accept(tcpsock,
 597                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 598                                 syslog(LOG_ERR, "accept failed: %m");
 599                                 exit(1);
 600                         }
 601                         memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero));
 602                         if (setsockopt(msgsock, SOL_SOCKET,
 603                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 604                                 syslog(LOG_ERR,
 605                                     "setsockopt SO_KEEPALIVE: %m");
 606                         nfsdargs.sock = msgsock;
 607                         nfsdargs.name = (caddr_t)&inetpeer;
 608                         nfsdargs.namelen = sizeof(inetpeer);
 609                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 610                         (void)close(msgsock);
 611                 }
 612 #ifdef notyet
 613                 if (tp4flag && FD_ISSET(tp4sock, &ready)) {
 614                         len = sizeof(isopeer);
 615                         if ((msgsock = accept(tp4sock,
 616                             (struct sockaddr *)&isopeer, &len)) < 0) {
 617                                 syslog(LOG_ERR, "accept failed: %m");
 618                                 exit(1);
 619                         }
 620                         if (setsockopt(msgsock, SOL_SOCKET,
 621                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 622                                 syslog(LOG_ERR,
 623                                     "setsockopt SO_KEEPALIVE: %m");
 624                         nfsdargs.sock = msgsock;
 625                         nfsdargs.name = (caddr_t)&isopeer;
 626                         nfsdargs.namelen = len;
 627                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 628                         (void)close(msgsock);
 629                 }
 630                 if (tpipflag && FD_ISSET(tpipsock, &ready)) {
 631                         len = sizeof(inetpeer);
 632                         if ((msgsock = accept(tpipsock,
 633                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 634                                 syslog(LOG_ERR, "accept failed: %m");
 635                                 exit(1);
 636                         }
 637                         if (setsockopt(msgsock, SOL_SOCKET,
 638                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 639                                 syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m");
 640                         nfsdargs.sock = msgsock;
 641                         nfsdargs.name = (caddr_t)&inetpeer;
 642                         nfsdargs.namelen = len;
 643                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 644                         (void)close(msgsock);
 645                 }
 646 #endif /* notyet */
 647         }
 648 }
 649
 650 void
 651 setbindhost(struct sockaddr_in *ia, const char *bindhost)
 652 {
 653         ia->sin_family = AF_INET;
 654         ia->sin_port = htons(NFS_PORT);
 655         ia->sin_len = sizeof(*ia);
 656         if (bindhost == NULL || strcmp(bindhost,"*") == 0) {
 657                 ia->sin_addr.s_addr = INADDR_ANY;
 658         } else {
 659                 if (inet_aton(bindhost, &ia->sin_addr) == 0) {
 660                         struct hostent *he;
 661
 662                         he = gethostbyname2(bindhost, ia->sin_family);
 663                         if (he == NULL) {
 664                                 syslog(LOG_ERR, "gethostbyname of %s failed", bindhost);
 665                                 exit(1);
 666                         }
 667                         bcopy(he->h_addr, &ia->sin_addr, he->h_length);
 668                 }
 669         }
 670 }
 671
 672 void
 673 usage()
 674 {
 675         (void)fprintf(stderr, "usage: nfsd %s\n", USAGE);
 676         exit(1);
 677 }
 678
 679 void
 680 nonfs(signo)
 681         int signo;
 682 {
 683         syslog(LOG_ERR, "missing system call: NFS not available");
 684 }
 685
 686 void
 687 reapchild(signo)
 688         int signo;
 689 {
 690
 691         while (wait3(NULL, WNOHANG, NULL) > 0);
 692 }
 693
 694 #ifdef OLD_SETPROCTITLE
 695 #ifdef __FreeBSD__
 696 void
 697 setproctitle(a)
 698         char *a;
 699 {
 700         register char *cp;
 701         char buf[80];
 702
 703         cp = Argv[0];
 704         (void)snprintf(buf, sizeof(buf), "nfsd-%s", a);
 705         (void)strncpy(cp, buf, LastArg - cp);
 706         cp += strlen(cp);
 707         while (cp < LastArg)
 708                 *cp++ = '\0';
 709         Argv[1] = NULL;
 710 }
 711 #endif  /* __FreeBSD__ */
 712 #endif