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  * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California.  All rights reserved.
  37  * @(#)nfsd.c   8.9 (Berkeley) 3/29/95
  38  * $FreeBSD: src/sbin/nfsd/nfsd.c,v 1.15.2.1 2000/09/16 22:52:23 brian Exp $
  39  * $DragonFly: src/sbin/nfsd/nfsd.c,v 1.2 2003/06/17 04:27:34 dillon Exp $
  40  */
  41
  42 #include <sys/param.h>
  43 #include <sys/syslog.h>
  44 #include <sys/wait.h>
  45 #include <sys/mount.h>
  46
  47 #include <rpc/rpc.h>
  48 #include <rpc/pmap_clnt.h>
  49
  50 #include <netdb.h>
  51 #include <arpa/inet.h>
  52 #ifdef ISO
  53 #include <netiso/iso.h>
  54 #endif
  55 #include <nfs/rpcv2.h>
  56 #include <nfs/nfsproto.h>
  57 #include <nfs/nfs.h>
  58
  59 #ifdef NFSKERB
  60 #include <kerberosIV/des.h>
  61 #include <kerberosIV/krb.h>
  62 #endif
  63
  64 #include <err.h>
  65 #include <errno.h>
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <strings.h>
  69 #include <unistd.h>
  70
  71 /* Global defs */
  72 #ifdef DEBUG
  73 #define syslog(e, s)    fprintf(stderr,(s))
  74 int     debug = 1;
  75 #else
  76 int     debug = 0;
  77 #endif
  78
  79 struct  nfsd_srvargs nsd;
  80 #ifdef OLD_SETPROCTITLE
  81 char    **Argv = NULL;          /* pointer to argument vector */
  82 char    *LastArg = NULL;        /* end of argv */
  83 #endif
  84
  85 #ifdef NFSKERB
  86 char            lnam[ANAME_SZ];
  87 KTEXT_ST        kt;
  88 AUTH_DAT        kauth;
  89 char            inst[INST_SZ];
  90 struct nfsrpc_fullblock kin, kout;
  91 struct nfsrpc_fullverf kverf;
  92 NFSKERBKEY_T    kivec;
  93 struct timeval  ktv;
  94 NFSKERBKEYSCHED_T kerb_keysched;
  95 #endif
  96
  97 void    nonfs __P((int));
  98 void    reapchild __P((int));
  99 void    setbindhost __P((struct sockaddr_in *ia, const char *bindhost));
 100 #ifdef OLD_SETPROCTITLE
 101 #ifdef __FreeBSD__
 102 void    setproctitle __P((char *));
 103 #endif
 104 #endif
 105 void    usage __P((void));
 106
 107 /*
 108  * Nfs server daemon mostly just a user context for nfssvc()
 109  *
 110  * 1 - do file descriptor and signal cleanup
 111  * 2 - fork the nfsd(s)
 112  * 3 - create server socket(s)
 113  * 4 - register socket with portmap
 114  *
 115  * For connectionless protocols, just pass the socket into the kernel via.
 116  * nfssvc().
 117  * For connection based sockets, loop doing accepts. When you get a new
 118  * socket from accept, pass the msgsock into the kernel via. nfssvc().
 119  * The arguments are:
 120  *      -c - support iso cltp clients
 121  *      -r - reregister with portmapper
 122  *      -t - support tcp nfs clients
 123  *      -u - support udp nfs clients
 124  * followed by "n" which is the number of nfsds' to fork off
 125  */
 126 int
 127 main(argc, argv, envp)
 128         int argc;
 129         char *argv[], *envp[];
 130 {
 131         struct nfsd_args nfsdargs;
 132         struct sockaddr_in inetaddr, inetpeer;
 133 #ifdef ISO
 134         struct sockaddr_iso isoaddr, isopeer;
 135         char *cp;
 136 #endif
 137         fd_set ready, sockbits;
 138         int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock;
 139         int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock;
 140         int tp4cnt, tp4flag, tpipcnt, tpipflag, udpflag;
 141         int bindhostc = 0, bindanyflag;
 142         char **bindhost = NULL;
 143 #ifdef notyet
 144         int tp4sock, tpipsock;
 145 #endif
 146 #ifdef NFSKERB
 147         struct group *grp;
 148         struct passwd *pwd;
 149         struct ucred *cr;
 150         struct timeval ktv;
 151         char **cpp;
 152 #endif
 153 #ifdef __FreeBSD__
 154         struct vfsconf vfc;
 155         int error;
 156
 157         error = getvfsbyname("nfs", &vfc);
 158         if (error && vfsisloadable("nfs")) {
 159                 if (vfsload("nfs"))
 160                         err(1, "vfsload(nfs)");
 161                 endvfsent();    /* flush cache */
 162                 error = getvfsbyname("nfs", &vfc);
 163         }
 164         if (error)
 165                 errx(1, "NFS is not available in the running kernel");
 166 #endif
 167
 168 #ifdef OLD_SETPROCTITLE
 169         /* Save start and extent of argv for setproctitle. */
 170         Argv = argv;
 171         if (envp == 0 || *envp == 0)
 172                 envp = argv;
 173         while (*envp)
 174                 envp++;
 175         LastArg = envp[-1] + strlen(envp[-1]);
 176 #endif
 177
 178 #define MAXNFSDCNT      20
 179 #define DEFNFSDCNT       4
 180         nfsdcnt = DEFNFSDCNT;
 181         cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
 182         bindanyflag = tpipflag = udpflag = 0;
 183 #ifdef ISO
 184 #define GETOPT  "ach:n:rtu"
 185 #define USAGE   "[-acrtu] [-n num_servers] [-h bindip]"
 186 #else
 187 #define GETOPT  "ah:n:rtu"
 188 #define USAGE   "[-artu] [-n num_servers] [-h bindip]"
 189 #endif
 190         while ((ch = getopt(argc, argv, GETOPT)) != -1)
 191                 switch (ch) {
 192                 case 'a':
 193                         bindanyflag = 1;
 194                         break;
 195                 case 'n':
 196                         nfsdcnt = atoi(optarg);
 197                         if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 198                                 warnx("nfsd count %d; reset to %d", nfsdcnt,
 199                                     DEFNFSDCNT);
 200                                 nfsdcnt = DEFNFSDCNT;
 201                         }
 202                         break;
 203                 case 'h':
 204                         bindhostc++;
 205                         bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 206                         if (bindhost == NULL)
 207                                 errx(1, "Out of memory");
 208                         bindhost[bindhostc-1] = strdup(optarg);
 209                         if (bindhost[bindhostc-1] == NULL)
 210                                 errx(1, "Out of memory");
 211                         break;
 212                 case 'r':
 213                         reregister = 1;
 214                         break;
 215                 case 't':
 216                         tcpflag = 1;
 217                         break;
 218                 case 'u':
 219                         udpflag = 1;
 220                         break;
 221 #ifdef ISO
 222                 case 'c':
 223                         cltpflag = 1;
 224                         break;
 225 #ifdef notyet
 226                 case 'i':
 227                         tp4cnt = 1;
 228                         break;
 229                 case 'p':
 230                         tpipcnt = 1;
 231                         break;
 232 #endif /* notyet */
 233 #endif /* ISO */
 234                 default:
 235                 case '?':
 236                         usage();
 237                 };
 238         if (!tcpflag && !udpflag)
 239                 udpflag = 1;
 240         argv += optind;
 241         argc -= optind;
 242
 243         /*
 244          * XXX
 245          * Backward compatibility, trailing number is the count of daemons.
 246          */
 247         if (argc > 1)
 248                 usage();
 249         if (argc == 1) {
 250                 nfsdcnt = atoi(argv[0]);
 251                 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 252                         warnx("nfsd count %d; reset to %d", nfsdcnt,
 253                             DEFNFSDCNT);
 254                         nfsdcnt = DEFNFSDCNT;
 255                 }
 256         }
 257
 258         if (bindhostc == 0 || bindanyflag) {
 259                 bindhostc++;
 260                 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 261                 if (bindhost == NULL)
 262                         errx(1, "Out of memory");
 263                 bindhost[bindhostc-1] = strdup("*");
 264                 if (bindhost[bindhostc-1] == NULL)
 265                         errx(1, "Out of memory");
 266         }
 267
 268         if (debug == 0) {
 269                 daemon(0, 0);
 270                 (void)signal(SIGHUP, SIG_IGN);
 271                 (void)signal(SIGINT, SIG_IGN);
 272                 (void)signal(SIGQUIT, SIG_IGN);
 273                 (void)signal(SIGSYS, nonfs);
 274                 (void)signal(SIGTERM, SIG_IGN);
 275         }
 276         (void)signal(SIGCHLD, reapchild);
 277
 278         if (reregister) {
 279                 if (udpflag &&
 280                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 281                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)))
 282                         err(1, "can't register with portmap for UDP");
 283                 if (tcpflag &&
 284                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 285                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)))
 286                         err(1, "can't register with portmap for TCP");
 287                 exit(0);
 288         }
 289         openlog("nfsd:", LOG_PID, LOG_DAEMON);
 290
 291         for (i = 0; i < nfsdcnt; i++) {
 292                 switch (fork()) {
 293                 case -1:
 294                         syslog(LOG_ERR, "fork: %m");
 295                         exit (1);
 296                 case 0:
 297                         break;
 298                 default:
 299                         continue;
 300                 }
 301
 302                 setproctitle("server");
 303                 nfssvc_flag = NFSSVC_NFSD;
 304                 nsd.nsd_nfsd = NULL;
 305 #ifdef NFSKERB
 306                 if (sizeof (struct nfsrpc_fullverf) != RPCX_FULLVERF ||
 307                     sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK)
 308                     syslog(LOG_ERR, "Yikes NFSKERB structs not packed!");
 309                 nsd.nsd_authstr = (u_char *)&kt;
 310                 nsd.nsd_authlen = sizeof (kt);
 311                 nsd.nsd_verfstr = (u_char *)&kverf;
 312                 nsd.nsd_verflen = sizeof (kverf);
 313 #endif
 314                 while (nfssvc(nfssvc_flag, &nsd) < 0) {
 315                         if (errno != ENEEDAUTH) {
 316                                 syslog(LOG_ERR, "nfssvc: %m");
 317                                 exit(1);
 318                         }
 319                         nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL;
 320 #ifdef NFSKERB
 321                         /*
 322                          * Get the Kerberos ticket out of the authenticator
 323                          * verify it and convert the principal name to a user
 324                          * name. The user name is then converted to a set of
 325                          * user credentials via the password and group file.
 326                          * Finally, decrypt the timestamp and validate it.
 327                          * For more info see the IETF Draft "Authentication
 328                          * in ONC RPC".
 329                          */
 330                         kt.length = ntohl(kt.length);
 331                         if (gettimeofday(&ktv, (struct timezone *)0) == 0 &&
 332                             kt.length > 0 && kt.length <=
 333                             (RPCAUTH_MAXSIZ - 3 * NFSX_UNSIGNED)) {
 334                             kin.w1 = NFS_KERBW1(kt);
 335                             kt.mbz = 0;
 336                             (void)strcpy(inst, "*");
 337                             if (krb_rd_req(&kt, NFS_KERBSRV,
 338                                 inst, nsd.nsd_haddr, &kauth, "") == RD_AP_OK &&
 339                                 krb_kntoln(&kauth, lnam) == KSUCCESS &&
 340                                 (pwd = getpwnam(lnam)) != NULL) {
 341                                 cr = &nsd.nsd_cr;
 342                                 cr->cr_uid = pwd->pw_uid;
 343                                 cr->cr_groups[0] = pwd->pw_gid;
 344                                 cr->cr_ngroups = 1;
 345                                 setgrent();
 346                                 while ((grp = getgrent()) != NULL) {
 347                                         if (grp->gr_gid == cr->cr_groups[0])
 348                                                 continue;
 349                                         for (cpp = grp->gr_mem;
 350                                             *cpp != NULL; ++cpp)
 351                                                 if (!strcmp(*cpp, lnam))
 352                                                         break;
 353                                         if (*cpp == NULL)
 354                                                 continue;
 355                                         cr->cr_groups[cr->cr_ngroups++]
 356                                             = grp->gr_gid;
 357                                         if (cr->cr_ngroups == NGROUPS)
 358                                                 break;
 359                                 }
 360                                 endgrent();
 361
 362                                 /*
 363                                  * Get the timestamp verifier out of the
 364                                  * authenticator and verifier strings.
 365                                  */
 366                                 kin.t1 = kverf.t1;
 367                                 kin.t2 = kverf.t2;
 368                                 kin.w2 = kverf.w2;
 369                                 bzero((caddr_t)kivec, sizeof (kivec));
 370                                 bcopy((caddr_t)kauth.session,
 371                                     (caddr_t)nsd.nsd_key,sizeof(kauth.session));
 372
 373                                 /*
 374                                  * Decrypt the timestamp verifier in CBC mode.
 375                                  */
 376                                 XXX
 377
 378                                 /*
 379                                  * Validate the timestamp verifier, to
 380                                  * check that the session key is ok.
 381                                  */
 382                                 nsd.nsd_timestamp.tv_sec = ntohl(kout.t1);
 383                                 nsd.nsd_timestamp.tv_usec = ntohl(kout.t2);
 384                                 nsd.nsd_ttl = ntohl(kout.w1);
 385                                 if ((nsd.nsd_ttl - 1) == ntohl(kout.w2))
 386                                     nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN;
 387                         }
 388 #endif /* NFSKERB */
 389                 }
 390                 exit(0);
 391         }
 392
 393         /* If we are serving udp, set up the socket. */
 394         for (i = 0; udpflag && i < bindhostc; i++) {
 395                 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 396                         syslog(LOG_ERR, "can't create udp socket");
 397                         exit(1);
 398                 }
 399                 setbindhost(&inetaddr, bindhost[i]);
 400                 if (bind(sock,
 401                     (struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
 402                         syslog(LOG_ERR, "can't bind udp addr %s: %m", bindhost[i]);
 403                         exit(1);
 404                 }
 405                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 406                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)) {
 407                         syslog(LOG_ERR, "can't register with udp portmap");
 408                         exit(1);
 409                 }
 410                 nfsdargs.sock = sock;
 411                 nfsdargs.name = NULL;
 412                 nfsdargs.namelen = 0;
 413                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 414                         syslog(LOG_ERR, "can't Add UDP socket");
 415                         exit(1);
 416                 }
 417                 (void)close(sock);
 418         }
 419
 420 #ifdef ISO
 421         /* If we are serving cltp, set up the socket. */
 422         if (cltpflag) {
 423                 if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) {
 424                         syslog(LOG_ERR, "can't create cltp socket");
 425                         exit(1);
 426                 }
 427                 memset(&isoaddr, 0, sizeof(isoaddr));
 428                 isoaddr.siso_family = AF_ISO;
 429                 isoaddr.siso_tlen = 2;
 430                 cp = TSEL(&isoaddr);
 431                 *cp++ = (NFS_PORT >> 8);
 432                 *cp = (NFS_PORT & 0xff);
 433                 isoaddr.siso_len = sizeof(isoaddr);
 434                 if (bind(sock,
 435                     (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) {
 436                         syslog(LOG_ERR, "can't bind cltp addr");
 437                         exit(1);
 438                 }
 439 #ifdef notyet
 440                 /*
 441                  * XXX
 442                  * Someday this should probably use "rpcbind", the son of
 443                  * portmap.
 444                  */
 445                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
 446                         syslog(LOG_ERR, "can't register with udp portmap");
 447                         exit(1);
 448                 }
 449 #endif /* notyet */
 450                 nfsdargs.sock = sock;
 451                 nfsdargs.name = NULL;
 452                 nfsdargs.namelen = 0;
 453                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 454                         syslog(LOG_ERR, "can't add UDP socket");
 455                         exit(1);
 456                 }
 457                 close(sock);
 458         }
 459 #endif /* ISO */
 460
 461         /* Now set up the master server socket waiting for tcp connections. */
 462         on = 1;
 463         FD_ZERO(&sockbits);
 464         connect_type_cnt = 0;
 465         for (i = 0; tcpflag && i < bindhostc; i++) {
 466                 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 467                         syslog(LOG_ERR, "can't create tcp socket");
 468                         exit(1);
 469                 }
 470                 if (setsockopt(tcpsock,
 471                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 472                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 473                 setbindhost(&inetaddr, bindhost[i]);
 474                 if (bind(tcpsock,
 475                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 476                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 477                         exit(1);
 478                 }
 479                 if (listen(tcpsock, 5) < 0) {
 480                         syslog(LOG_ERR, "listen failed");
 481                         exit(1);
 482                 }
 483                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 484                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)) {
 485                         syslog(LOG_ERR, "can't register tcp with portmap");
 486                         exit(1);
 487                 }
 488                 FD_SET(tcpsock, &sockbits);
 489                 maxsock = tcpsock;
 490                 connect_type_cnt++;
 491         }
 492
 493 #ifdef notyet
 494         /* Now set up the master server socket waiting for tp4 connections. */
 495         if (tp4flag) {
 496                 if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) {
 497                         syslog(LOG_ERR, "can't create tp4 socket");
 498                         exit(1);
 499                 }
 500                 if (setsockopt(tp4sock,
 501                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 502                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 503                 memset(&isoaddr, 0, sizeof(isoaddr));
 504                 isoaddr.siso_family = AF_ISO;
 505                 isoaddr.siso_tlen = 2;
 506                 cp = TSEL(&isoaddr);
 507                 *cp++ = (NFS_PORT >> 8);
 508                 *cp = (NFS_PORT & 0xff);
 509                 isoaddr.siso_len = sizeof(isoaddr);
 510                 if (bind(tp4sock,
 511                     (struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) {
 512                         syslog(LOG_ERR, "can't bind tp4 addr");
 513                         exit(1);
 514                 }
 515                 if (listen(tp4sock, 5) < 0) {
 516                         syslog(LOG_ERR, "listen failed");
 517                         exit(1);
 518                 }
 519                 /*
 520                  * XXX
 521                  * Someday this should probably use "rpcbind", the son of
 522                  * portmap.
 523                  */
 524                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 525                         syslog(LOG_ERR, "can't register tcp with portmap");
 526                         exit(1);
 527                 }
 528                 FD_SET(tp4sock, &sockbits);
 529                 maxsock = tp4sock;
 530                 connect_type_cnt++;
 531         }
 532
 533         /* Now set up the master server socket waiting for tpip connections. */
 534         for (i = 0; tpipflag && i < bindhostc; i++) {
 535                 if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
 536                         syslog(LOG_ERR, "can't create tpip socket");
 537                         exit(1);
 538                 }
 539                 if (setsockopt(tpipsock,
 540                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 541                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 542                 setbindhost(&inetaddr, bindhost[i]);
 543                 if (bind(tpipsock,
 544                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 545                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 546                         exit(1);
 547                 }
 548                 if (listen(tpipsock, 5) < 0) {
 549                         syslog(LOG_ERR, "listen failed");
 550                         exit(1);
 551                 }
 552                 /*
 553                  * XXX
 554                  * Someday this should probably use "rpcbind", the son of
 555                  * portmap.
 556                  */
 557                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 558                         syslog(LOG_ERR, "can't register tcp with portmap");
 559                         exit(1);
 560                 }
 561                 FD_SET(tpipsock, &sockbits);
 562                 maxsock = tpipsock;
 563                 connect_type_cnt++;
 564         }
 565 #endif /* notyet */
 566
 567         if (connect_type_cnt == 0)
 568                 exit(0);
 569
 570         setproctitle("master");
 571
 572         /*
 573          * Loop forever accepting connections and passing the sockets
 574          * into the kernel for the mounts.
 575          */
 576         for (;;) {
 577                 ready = sockbits;
 578                 if (connect_type_cnt > 1) {
 579                         if (select(maxsock + 1,
 580                             &ready, NULL, NULL, NULL) < 1) {
 581                                 syslog(LOG_ERR, "select failed: %m");
 582                                 exit(1);
 583                         }
 584                 }
 585                 if (tcpflag && FD_ISSET(tcpsock, &ready)) {
 586                         len = sizeof(inetpeer);
 587                         if ((msgsock = accept(tcpsock,
 588                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 589                                 syslog(LOG_ERR, "accept failed: %m");
 590                                 exit(1);
 591                         }
 592                         memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero));
 593                         if (setsockopt(msgsock, SOL_SOCKET,
 594                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 595                                 syslog(LOG_ERR,
 596                                     "setsockopt SO_KEEPALIVE: %m");
 597                         nfsdargs.sock = msgsock;
 598                         nfsdargs.name = (caddr_t)&inetpeer;
 599                         nfsdargs.namelen = sizeof(inetpeer);
 600                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 601                         (void)close(msgsock);
 602                 }
 603 #ifdef notyet
 604                 if (tp4flag && FD_ISSET(tp4sock, &ready)) {
 605                         len = sizeof(isopeer);
 606                         if ((msgsock = accept(tp4sock,
 607                             (struct sockaddr *)&isopeer, &len)) < 0) {
 608                                 syslog(LOG_ERR, "accept failed: %m");
 609                                 exit(1);
 610                         }
 611                         if (setsockopt(msgsock, SOL_SOCKET,
 612                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 613                                 syslog(LOG_ERR,
 614                                     "setsockopt SO_KEEPALIVE: %m");
 615                         nfsdargs.sock = msgsock;
 616                         nfsdargs.name = (caddr_t)&isopeer;
 617                         nfsdargs.namelen = len;
 618                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 619                         (void)close(msgsock);
 620                 }
 621                 if (tpipflag && FD_ISSET(tpipsock, &ready)) {
 622                         len = sizeof(inetpeer);
 623                         if ((msgsock = accept(tpipsock,
 624                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 625                                 syslog(LOG_ERR, "accept failed: %m");
 626                                 exit(1);
 627                         }
 628                         if (setsockopt(msgsock, SOL_SOCKET,
 629                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 630                                 syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m");
 631                         nfsdargs.sock = msgsock;
 632                         nfsdargs.name = (caddr_t)&inetpeer;
 633                         nfsdargs.namelen = len;
 634                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 635                         (void)close(msgsock);
 636                 }
 637 #endif /* notyet */
 638         }
 639 }
 640
 641 void
 642 setbindhost(struct sockaddr_in *ia, const char *bindhost)
 643 {
 644         ia->sin_family = AF_INET;
 645         ia->sin_port = htons(NFS_PORT);
 646         ia->sin_len = sizeof(*ia);
 647         if (bindhost == NULL || strcmp(bindhost,"*") == 0) {
 648                 ia->sin_addr.s_addr = INADDR_ANY;
 649         } else {
 650                 if (inet_aton(bindhost, &ia->sin_addr) == 0) {
 651                         struct hostent *he;
 652
 653                         he = gethostbyname2(bindhost, ia->sin_family);
 654                         if (he == NULL) {
 655                                 syslog(LOG_ERR, "gethostbyname of %s failed", bindhost);
 656                                 exit(1);
 657                         }
 658                         bcopy(he->h_addr, &ia->sin_addr, he->h_length);
 659                 }
 660         }
 661 }
 662
 663 void
 664 usage()
 665 {
 666         (void)fprintf(stderr, "usage: nfsd %s\n", USAGE);
 667         exit(1);
 668 }
 669
 670 void
 671 nonfs(signo)
 672         int signo;
 673 {
 674         syslog(LOG_ERR, "missing system call: NFS not available");
 675 }
 676
 677 void
 678 reapchild(signo)
 679         int signo;
 680 {
 681
 682         while (wait3(NULL, WNOHANG, NULL) > 0);
 683 }
 684
 685 #ifdef OLD_SETPROCTITLE
 686 #ifdef __FreeBSD__
 687 void
 688 setproctitle(a)
 689         char *a;
 690 {
 691         register char *cp;
 692         char buf[80];
 693
 694         cp = Argv[0];
 695         (void)snprintf(buf, sizeof(buf), "nfsd-%s", a);
 696         (void)strncpy(cp, buf, LastArg - cp);
 697         cp += strlen(cp);
 698         while (cp < LastArg)
 699                 *cp++ = '\0';
 700         Argv[1] = NULL;
 701 }
 702 #endif  /* __FreeBSD__ */
 703 #endif