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 1.3 2003/08/05 07:45:42 asmodai 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 #include <err.h>
  60 #include <errno.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <strings.h>
  64 #include <unistd.h>
  65
  66 /* Global defs */
  67 #ifdef DEBUG
  68 #define syslog(e, s)    fprintf(stderr,(s))
  69 int     debug = 1;
  70 #else
  71 int     debug = 0;
  72 #endif
  73
  74 struct  nfsd_srvargs nsd;
  75 #ifdef OLD_SETPROCTITLE
  76 char    **Argv = NULL;          /* pointer to argument vector */
  77 char    *LastArg = NULL;        /* end of argv */
  78 #endif
  79
  80 #ifdef NFSKERB
  81 char            lnam[ANAME_SZ];
  82 KTEXT_ST        kt;
  83 AUTH_DAT        kauth;
  84 char            inst[INST_SZ];
  85 struct nfsrpc_fullblock kin, kout;
  86 struct nfsrpc_fullverf kverf;
  87 NFSKERBKEY_T    kivec;
  88 struct timeval  ktv;
  89 NFSKERBKEYSCHED_T kerb_keysched;
  90 #endif
  91
  92 void    nonfs __P((int));
  93 void    reapchild __P((int));
  94 void    setbindhost __P((struct sockaddr_in *ia, const char *bindhost));
  95 #ifdef OLD_SETPROCTITLE
  96 #ifdef __FreeBSD__
  97 void    setproctitle __P((char *));
  98 #endif
  99 #endif
 100 void    usage __P((void));
 101
 102 /*
 103  * Nfs server daemon mostly just a user context for nfssvc()
 104  *
 105  * 1 - do file descriptor and signal cleanup
 106  * 2 - fork the nfsd(s)
 107  * 3 - create server socket(s)
 108  * 4 - register socket with portmap
 109  *
 110  * For connectionless protocols, just pass the socket into the kernel via.
 111  * nfssvc().
 112  * For connection based sockets, loop doing accepts. When you get a new
 113  * socket from accept, pass the msgsock into the kernel via. nfssvc().
 114  * The arguments are:
 115  *      -c - support iso cltp clients
 116  *      -r - reregister with portmapper
 117  *      -t - support tcp nfs clients
 118  *      -u - support udp nfs clients
 119  * followed by "n" which is the number of nfsds' to fork off
 120  */
 121 int
 122 main(argc, argv, envp)
 123         int argc;
 124         char *argv[], *envp[];
 125 {
 126         struct nfsd_args nfsdargs;
 127         struct sockaddr_in inetaddr, inetpeer;
 128 #ifdef ISO
 129         struct sockaddr_iso isoaddr, isopeer;
 130         char *cp;
 131 #endif
 132         fd_set ready, sockbits;
 133         int ch, cltpflag, connect_type_cnt, i, len, maxsock, msgsock;
 134         int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock;
 135         int tp4cnt, tp4flag, tpipcnt, tpipflag, udpflag;
 136         int bindhostc = 0, bindanyflag;
 137         char **bindhost = NULL;
 138 #ifdef notyet
 139         int tp4sock, tpipsock;
 140 #endif
 141 #ifdef NFSKERB
 142         struct group *grp;
 143         struct passwd *pwd;
 144         struct ucred *cr;
 145         struct timeval ktv;
 146         char **cpp;
 147 #endif
 148 #ifdef __FreeBSD__
 149         struct vfsconf vfc;
 150         int error;
 151
 152         error = getvfsbyname("nfs", &vfc);
 153         if (error && vfsisloadable("nfs")) {
 154                 if (vfsload("nfs"))
 155                         err(1, "vfsload(nfs)");
 156                 endvfsent();    /* flush cache */
 157                 error = getvfsbyname("nfs", &vfc);
 158         }
 159         if (error)
 160                 errx(1, "NFS is not available in the running kernel");
 161 #endif
 162
 163 #ifdef OLD_SETPROCTITLE
 164         /* Save start and extent of argv for setproctitle. */
 165         Argv = argv;
 166         if (envp == 0 || *envp == 0)
 167                 envp = argv;
 168         while (*envp)
 169                 envp++;
 170         LastArg = envp[-1] + strlen(envp[-1]);
 171 #endif
 172
 173 #define MAXNFSDCNT      20
 174 #define DEFNFSDCNT       4
 175         nfsdcnt = DEFNFSDCNT;
 176         cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
 177         bindanyflag = tpipflag = udpflag = 0;
 178 #ifdef ISO
 179 #define GETOPT  "ach:n:rtu"
 180 #define USAGE   "[-acrtu] [-n num_servers] [-h bindip]"
 181 #else
 182 #define GETOPT  "ah:n:rtu"
 183 #define USAGE   "[-artu] [-n num_servers] [-h bindip]"
 184 #endif
 185         while ((ch = getopt(argc, argv, GETOPT)) != -1)
 186                 switch (ch) {
 187                 case 'a':
 188                         bindanyflag = 1;
 189                         break;
 190                 case 'n':
 191                         nfsdcnt = atoi(optarg);
 192                         if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 193                                 warnx("nfsd count %d; reset to %d", nfsdcnt,
 194                                     DEFNFSDCNT);
 195                                 nfsdcnt = DEFNFSDCNT;
 196                         }
 197                         break;
 198                 case 'h':
 199                         bindhostc++;
 200                         bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 201                         if (bindhost == NULL)
 202                                 errx(1, "Out of memory");
 203                         bindhost[bindhostc-1] = strdup(optarg);
 204                         if (bindhost[bindhostc-1] == NULL)
 205                                 errx(1, "Out of memory");
 206                         break;
 207                 case 'r':
 208                         reregister = 1;
 209                         break;
 210                 case 't':
 211                         tcpflag = 1;
 212                         break;
 213                 case 'u':
 214                         udpflag = 1;
 215                         break;
 216 #ifdef ISO
 217                 case 'c':
 218                         cltpflag = 1;
 219                         break;
 220 #ifdef notyet
 221                 case 'i':
 222                         tp4cnt = 1;
 223                         break;
 224                 case 'p':
 225                         tpipcnt = 1;
 226                         break;
 227 #endif /* notyet */
 228 #endif /* ISO */
 229                 default:
 230                 case '?':
 231                         usage();
 232                 };
 233         if (!tcpflag && !udpflag)
 234                 udpflag = 1;
 235         argv += optind;
 236         argc -= optind;
 237
 238         /*
 239          * XXX
 240          * Backward compatibility, trailing number is the count of daemons.
 241          */
 242         if (argc > 1)
 243                 usage();
 244         if (argc == 1) {
 245                 nfsdcnt = atoi(argv[0]);
 246                 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 247                         warnx("nfsd count %d; reset to %d", nfsdcnt,
 248                             DEFNFSDCNT);
 249                         nfsdcnt = DEFNFSDCNT;
 250                 }
 251         }
 252
 253         if (bindhostc == 0 || bindanyflag) {
 254                 bindhostc++;
 255                 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 256                 if (bindhost == NULL)
 257                         errx(1, "Out of memory");
 258                 bindhost[bindhostc-1] = strdup("*");
 259                 if (bindhost[bindhostc-1] == NULL)
 260                         errx(1, "Out of memory");
 261         }
 262
 263         if (debug == 0) {
 264                 daemon(0, 0);
 265                 (void)signal(SIGHUP, SIG_IGN);
 266                 (void)signal(SIGINT, SIG_IGN);
 267                 (void)signal(SIGQUIT, SIG_IGN);
 268                 (void)signal(SIGSYS, nonfs);
 269                 (void)signal(SIGTERM, SIG_IGN);
 270         }
 271         (void)signal(SIGCHLD, reapchild);
 272
 273         if (reregister) {
 274                 if (udpflag &&
 275                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 276                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)))
 277                         err(1, "can't register with portmap for UDP");
 278                 if (tcpflag &&
 279                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 280                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)))
 281                         err(1, "can't register with portmap for TCP");
 282                 exit(0);
 283         }
 284         openlog("nfsd:", LOG_PID, LOG_DAEMON);
 285
 286         for (i = 0; i < nfsdcnt; i++) {
 287                 switch (fork()) {
 288                 case -1:
 289                         syslog(LOG_ERR, "fork: %m");
 290                         exit (1);
 291                 case 0:
 292                         break;
 293                 default:
 294                         continue;
 295                 }
 296
 297                 setproctitle("server");
 298                 nfssvc_flag = NFSSVC_NFSD;
 299                 nsd.nsd_nfsd = NULL;
 300 #ifdef NFSKERB
 301                 if (sizeof (struct nfsrpc_fullverf) != RPCX_FULLVERF ||
 302                     sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK)
 303                     syslog(LOG_ERR, "Yikes NFSKERB structs not packed!");
 304                 nsd.nsd_authstr = (u_char *)&kt;
 305                 nsd.nsd_authlen = sizeof (kt);
 306                 nsd.nsd_verfstr = (u_char *)&kverf;
 307                 nsd.nsd_verflen = sizeof (kverf);
 308 #endif
 309                 while (nfssvc(nfssvc_flag, &nsd) < 0) {
 310                         if (errno != ENEEDAUTH) {
 311                                 syslog(LOG_ERR, "nfssvc: %m");
 312                                 exit(1);
 313                         }
 314                         nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL;
 315 #ifdef NFSKERB
 316                         /*
 317                          * Get the Kerberos ticket out of the authenticator
 318                          * verify it and convert the principal name to a user
 319                          * name. The user name is then converted to a set of
 320                          * user credentials via the password and group file.
 321                          * Finally, decrypt the timestamp and validate it.
 322                          * For more info see the IETF Draft "Authentication
 323                          * in ONC RPC".
 324                          */
 325                         kt.length = ntohl(kt.length);
 326                         if (gettimeofday(&ktv, (struct timezone *)0) == 0 &&
 327                             kt.length > 0 && kt.length <=
 328                             (RPCAUTH_MAXSIZ - 3 * NFSX_UNSIGNED)) {
 329                             kin.w1 = NFS_KERBW1(kt);
 330                             kt.mbz = 0;
 331                             (void)strcpy(inst, "*");
 332                             if (krb_rd_req(&kt, NFS_KERBSRV,
 333                                 inst, nsd.nsd_haddr, &kauth, "") == RD_AP_OK &&
 334                                 krb_kntoln(&kauth, lnam) == KSUCCESS &&
 335                                 (pwd = getpwnam(lnam)) != NULL) {
 336                                 cr = &nsd.nsd_cr;
 337                                 cr->cr_uid = pwd->pw_uid;
 338                                 cr->cr_groups[0] = pwd->pw_gid;
 339                                 cr->cr_ngroups = 1;
 340                                 setgrent();
 341                                 while ((grp = getgrent()) != NULL) {
 342                                         if (grp->gr_gid == cr->cr_groups[0])
 343                                                 continue;
 344                                         for (cpp = grp->gr_mem;
 345                                             *cpp != NULL; ++cpp)
 346                                                 if (!strcmp(*cpp, lnam))
 347                                                         break;
 348                                         if (*cpp == NULL)
 349                                                 continue;
 350                                         cr->cr_groups[cr->cr_ngroups++]
 351                                             = grp->gr_gid;
 352                                         if (cr->cr_ngroups == NGROUPS)
 353                                                 break;
 354                                 }
 355                                 endgrent();
 356
 357                                 /*
 358                                  * Get the timestamp verifier out of the
 359                                  * authenticator and verifier strings.
 360                                  */
 361                                 kin.t1 = kverf.t1;
 362                                 kin.t2 = kverf.t2;
 363                                 kin.w2 = kverf.w2;
 364                                 bzero((caddr_t)kivec, sizeof (kivec));
 365                                 bcopy((caddr_t)kauth.session,
 366                                     (caddr_t)nsd.nsd_key,sizeof(kauth.session));
 367
 368                                 /*
 369                                  * Decrypt the timestamp verifier in CBC mode.
 370                                  */
 371                                 XXX
 372
 373                                 /*
 374                                  * Validate the timestamp verifier, to
 375                                  * check that the session key is ok.
 376                                  */
 377                                 nsd.nsd_timestamp.tv_sec = ntohl(kout.t1);
 378                                 nsd.nsd_timestamp.tv_usec = ntohl(kout.t2);
 379                                 nsd.nsd_ttl = ntohl(kout.w1);
 380                                 if ((nsd.nsd_ttl - 1) == ntohl(kout.w2))
 381                                     nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN;
 382                         }
 383 #endif /* NFSKERB */
 384                 }
 385                 exit(0);
 386         }
 387
 388         /* If we are serving udp, set up the socket. */
 389         for (i = 0; udpflag && i < bindhostc; i++) {
 390                 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 391                         syslog(LOG_ERR, "can't create udp socket");
 392                         exit(1);
 393                 }
 394                 setbindhost(&inetaddr, bindhost[i]);
 395                 if (bind(sock,
 396                     (struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
 397                         syslog(LOG_ERR, "can't bind udp addr %s: %m", bindhost[i]);
 398                         exit(1);
 399                 }
 400                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 401                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)) {
 402                         syslog(LOG_ERR, "can't register with udp portmap");
 403                         exit(1);
 404                 }
 405                 nfsdargs.sock = sock;
 406                 nfsdargs.name = NULL;
 407                 nfsdargs.namelen = 0;
 408                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 409                         syslog(LOG_ERR, "can't Add UDP socket");
 410                         exit(1);
 411                 }
 412                 (void)close(sock);
 413         }
 414
 415 #ifdef ISO
 416         /* If we are serving cltp, set up the socket. */
 417         if (cltpflag) {
 418                 if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) {
 419                         syslog(LOG_ERR, "can't create cltp socket");
 420                         exit(1);
 421                 }
 422                 memset(&isoaddr, 0, sizeof(isoaddr));
 423                 isoaddr.siso_family = AF_ISO;
 424                 isoaddr.siso_tlen = 2;
 425                 cp = TSEL(&isoaddr);
 426                 *cp++ = (NFS_PORT >> 8);
 427                 *cp = (NFS_PORT & 0xff);
 428                 isoaddr.siso_len = sizeof(isoaddr);
 429                 if (bind(sock,
 430                     (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) {
 431                         syslog(LOG_ERR, "can't bind cltp addr");
 432                         exit(1);
 433                 }
 434 #ifdef notyet
 435                 /*
 436                  * XXX
 437                  * Someday this should probably use "rpcbind", the son of
 438                  * portmap.
 439                  */
 440                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
 441                         syslog(LOG_ERR, "can't register with udp portmap");
 442                         exit(1);
 443                 }
 444 #endif /* notyet */
 445                 nfsdargs.sock = sock;
 446                 nfsdargs.name = NULL;
 447                 nfsdargs.namelen = 0;
 448                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 449                         syslog(LOG_ERR, "can't add UDP socket");
 450                         exit(1);
 451                 }
 452                 close(sock);
 453         }
 454 #endif /* ISO */
 455
 456         /* Now set up the master server socket waiting for tcp connections. */
 457         on = 1;
 458         FD_ZERO(&sockbits);
 459         connect_type_cnt = 0;
 460         for (i = 0; tcpflag && i < bindhostc; i++) {
 461                 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 462                         syslog(LOG_ERR, "can't create tcp socket");
 463                         exit(1);
 464                 }
 465                 if (setsockopt(tcpsock,
 466                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 467                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 468                 setbindhost(&inetaddr, bindhost[i]);
 469                 if (bind(tcpsock,
 470                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 471                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 472                         exit(1);
 473                 }
 474                 if (listen(tcpsock, 5) < 0) {
 475                         syslog(LOG_ERR, "listen failed");
 476                         exit(1);
 477                 }
 478                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 479                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)) {
 480                         syslog(LOG_ERR, "can't register tcp with portmap");
 481                         exit(1);
 482                 }
 483                 FD_SET(tcpsock, &sockbits);
 484                 maxsock = tcpsock;
 485                 connect_type_cnt++;
 486         }
 487
 488 #ifdef notyet
 489         /* Now set up the master server socket waiting for tp4 connections. */
 490         if (tp4flag) {
 491                 if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) {
 492                         syslog(LOG_ERR, "can't create tp4 socket");
 493                         exit(1);
 494                 }
 495                 if (setsockopt(tp4sock,
 496                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 497                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 498                 memset(&isoaddr, 0, sizeof(isoaddr));
 499                 isoaddr.siso_family = AF_ISO;
 500                 isoaddr.siso_tlen = 2;
 501                 cp = TSEL(&isoaddr);
 502                 *cp++ = (NFS_PORT >> 8);
 503                 *cp = (NFS_PORT & 0xff);
 504                 isoaddr.siso_len = sizeof(isoaddr);
 505                 if (bind(tp4sock,
 506                     (struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) {
 507                         syslog(LOG_ERR, "can't bind tp4 addr");
 508                         exit(1);
 509                 }
 510                 if (listen(tp4sock, 5) < 0) {
 511                         syslog(LOG_ERR, "listen failed");
 512                         exit(1);
 513                 }
 514                 /*
 515                  * XXX
 516                  * Someday this should probably use "rpcbind", the son of
 517                  * portmap.
 518                  */
 519                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 520                         syslog(LOG_ERR, "can't register tcp with portmap");
 521                         exit(1);
 522                 }
 523                 FD_SET(tp4sock, &sockbits);
 524                 maxsock = tp4sock;
 525                 connect_type_cnt++;
 526         }
 527
 528         /* Now set up the master server socket waiting for tpip connections. */
 529         for (i = 0; tpipflag && i < bindhostc; i++) {
 530                 if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
 531                         syslog(LOG_ERR, "can't create tpip socket");
 532                         exit(1);
 533                 }
 534                 if (setsockopt(tpipsock,
 535                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 536                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 537                 setbindhost(&inetaddr, bindhost[i]);
 538                 if (bind(tpipsock,
 539                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 540                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 541                         exit(1);
 542                 }
 543                 if (listen(tpipsock, 5) < 0) {
 544                         syslog(LOG_ERR, "listen failed");
 545                         exit(1);
 546                 }
 547                 /*
 548                  * XXX
 549                  * Someday this should probably use "rpcbind", the son of
 550                  * portmap.
 551                  */
 552                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 553                         syslog(LOG_ERR, "can't register tcp with portmap");
 554                         exit(1);
 555                 }
 556                 FD_SET(tpipsock, &sockbits);
 557                 maxsock = tpipsock;
 558                 connect_type_cnt++;
 559         }
 560 #endif /* notyet */
 561
 562         if (connect_type_cnt == 0)
 563                 exit(0);
 564
 565         setproctitle("master");
 566
 567         /*
 568          * Loop forever accepting connections and passing the sockets
 569          * into the kernel for the mounts.
 570          */
 571         for (;;) {
 572                 ready = sockbits;
 573                 if (connect_type_cnt > 1) {
 574                         if (select(maxsock + 1,
 575                             &ready, NULL, NULL, NULL) < 1) {
 576                                 syslog(LOG_ERR, "select failed: %m");
 577                                 exit(1);
 578                         }
 579                 }
 580                 if (tcpflag && FD_ISSET(tcpsock, &ready)) {
 581                         len = sizeof(inetpeer);
 582                         if ((msgsock = accept(tcpsock,
 583                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 584                                 syslog(LOG_ERR, "accept failed: %m");
 585                                 exit(1);
 586                         }
 587                         memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero));
 588                         if (setsockopt(msgsock, SOL_SOCKET,
 589                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 590                                 syslog(LOG_ERR,
 591                                     "setsockopt SO_KEEPALIVE: %m");
 592                         nfsdargs.sock = msgsock;
 593                         nfsdargs.name = (caddr_t)&inetpeer;
 594                         nfsdargs.namelen = sizeof(inetpeer);
 595                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 596                         (void)close(msgsock);
 597                 }
 598 #ifdef notyet
 599                 if (tp4flag && FD_ISSET(tp4sock, &ready)) {
 600                         len = sizeof(isopeer);
 601                         if ((msgsock = accept(tp4sock,
 602                             (struct sockaddr *)&isopeer, &len)) < 0) {
 603                                 syslog(LOG_ERR, "accept failed: %m");
 604                                 exit(1);
 605                         }
 606                         if (setsockopt(msgsock, SOL_SOCKET,
 607                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 608                                 syslog(LOG_ERR,
 609                                     "setsockopt SO_KEEPALIVE: %m");
 610                         nfsdargs.sock = msgsock;
 611                         nfsdargs.name = (caddr_t)&isopeer;
 612                         nfsdargs.namelen = len;
 613                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 614                         (void)close(msgsock);
 615                 }
 616                 if (tpipflag && FD_ISSET(tpipsock, &ready)) {
 617                         len = sizeof(inetpeer);
 618                         if ((msgsock = accept(tpipsock,
 619                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 620                                 syslog(LOG_ERR, "accept failed: %m");
 621                                 exit(1);
 622                         }
 623                         if (setsockopt(msgsock, SOL_SOCKET,
 624                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 625                                 syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m");
 626                         nfsdargs.sock = msgsock;
 627                         nfsdargs.name = (caddr_t)&inetpeer;
 628                         nfsdargs.namelen = len;
 629                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 630                         (void)close(msgsock);
 631                 }
 632 #endif /* notyet */
 633         }
 634 }
 635
 636 void
 637 setbindhost(struct sockaddr_in *ia, const char *bindhost)
 638 {
 639         ia->sin_family = AF_INET;
 640         ia->sin_port = htons(NFS_PORT);
 641         ia->sin_len = sizeof(*ia);
 642         if (bindhost == NULL || strcmp(bindhost,"*") == 0) {
 643                 ia->sin_addr.s_addr = INADDR_ANY;
 644         } else {
 645                 if (inet_aton(bindhost, &ia->sin_addr) == 0) {
 646                         struct hostent *he;
 647
 648                         he = gethostbyname2(bindhost, ia->sin_family);
 649                         if (he == NULL) {
 650                                 syslog(LOG_ERR, "gethostbyname of %s failed", bindhost);
 651                                 exit(1);
 652                         }
 653                         bcopy(he->h_addr, &ia->sin_addr, he->h_length);
 654                 }
 655         }
 656 }
 657
 658 void
 659 usage()
 660 {
 661         (void)fprintf(stderr, "usage: nfsd %s\n", USAGE);
 662         exit(1);
 663 }
 664
 665 void
 666 nonfs(signo)
 667         int signo;
 668 {
 669         syslog(LOG_ERR, "missing system call: NFS not available");
 670 }
 671
 672 void
 673 reapchild(signo)
 674         int signo;
 675 {
 676
 677         while (wait3(NULL, WNOHANG, NULL) > 0);
 678 }
 679
 680 #ifdef OLD_SETPROCTITLE
 681 #ifdef __FreeBSD__
 682 void
 683 setproctitle(a)
 684         char *a;
 685 {
 686         register char *cp;
 687         char buf[80];
 688
 689         cp = Argv[0];
 690         (void)snprintf(buf, sizeof(buf), "nfsd-%s", a);
 691         (void)strncpy(cp, buf, LastArg - cp);
 692         cp += strlen(cp);
 693         while (cp < LastArg)
 694                 *cp++ = '\0';
 695         Argv[1] = NULL;
 696 }
 697 #endif  /* __FreeBSD__ */
 698 #endif