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 1.9 2006/12/27 23:01:19 corecode 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
  76 #ifdef NFSKERB
  77 char            lnam[ANAME_SZ];
  78 KTEXT_ST        kt;
  79 AUTH_DAT        kauth;
  80 char            inst[INST_SZ];
  81 struct nfsrpc_fullblock kin, kout;
  82 struct nfsrpc_fullverf kverf;
  83 NFSKERBKEY_T    kivec;
  84 struct timeval  ktv;
  85 NFSKERBKEYSCHED_T kerb_keysched;
  86 #endif
  87
  88 void    nonfs(int);
  89 void    reapchild(int);
  90 void    setbindhost(struct sockaddr_in *ia, const char *bindhost);
  91 void    usage(void);
  92
  93 /*
  94  * Nfs server daemon mostly just a user context for nfssvc()
  95  *
  96  * 1 - do file descriptor and signal cleanup
  97  * 2 - fork the nfsd(s)
  98  * 3 - create server socket(s)
  99  * 4 - register socket with portmap
 100  *
 101  * For connectionless protocols, just pass the socket into the kernel via.
 102  * nfssvc().
 103  * For connection based sockets, loop doing accepts. When you get a new
 104  * socket from accept, pass the msgsock into the kernel via. nfssvc().
 105  * The arguments are:
 106  *      -c - support iso cltp clients
 107  *      -r - reregister with portmapper
 108  *      -t - support tcp nfs clients
 109  *      -u - support udp nfs clients
 110  * followed by "n" which is the number of nfsds' to fork off
 111  */
 112 int
 113 main(int argc, char **argv, char **envp)
 114 {
 115         struct nfsd_args nfsdargs;
 116         struct sockaddr_in inetaddr, inetpeer;
 117 #ifdef ISO
 118         struct sockaddr_iso isoaddr, isopeer;
 119         char *cp;
 120 #endif
 121         fd_set ready, sockbits;
 122         int ch, cltpflag, connect_type_cnt, i, len, maxsock = -1, msgsock;
 123         int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock = -1;
 124         int tp4cnt, tp4flag, tpipcnt, tpipflag, udpflag;
 125         int bindhostc = 0, bindanyflag;
 126         char **bindhost = NULL;
 127 #ifdef notyet
 128         int tp4sock, tpipsock;
 129 #endif
 130 #ifdef NFSKERB
 131         struct group *grp;
 132         struct passwd *pwd;
 133         struct ucred *cr;
 134         struct timeval ktv;
 135         char **cpp;
 136 #endif
 137         struct vfsconf vfc;
 138         int error;
 139
 140         error = getvfsbyname("nfs", &vfc);
 141         if (error && vfsisloadable("nfs")) {
 142                 if (vfsload("nfs"))
 143                         err(1, "vfsload(nfs)");
 144                 endvfsent();    /* flush cache */
 145                 error = getvfsbyname("nfs", &vfc);
 146         }
 147         if (error)
 148                 errx(1, "NFS is not available in the running kernel");
 149
 150 #define MAXNFSDCNT      20
 151 #define DEFNFSDCNT       4
 152         nfsdcnt = DEFNFSDCNT;
 153         cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
 154         bindanyflag = tpipflag = udpflag = 0;
 155 #ifdef ISO
 156 #define GETOPT  "ach:n:rtu"
 157 #define USAGE   "[-acrtu] [-n num_servers] [-h bindip]"
 158 #else
 159 #define GETOPT  "ah:n:rtu"
 160 #define USAGE   "[-artu] [-n num_servers] [-h bindip]"
 161 #endif
 162         while ((ch = getopt(argc, argv, GETOPT)) != -1)
 163                 switch (ch) {
 164                 case 'a':
 165                         bindanyflag = 1;
 166                         break;
 167                 case 'n':
 168                         nfsdcnt = atoi(optarg);
 169                         if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 170                                 warnx("nfsd count %d; reset to %d", nfsdcnt,
 171                                     DEFNFSDCNT);
 172                                 nfsdcnt = DEFNFSDCNT;
 173                         }
 174                         break;
 175                 case 'h':
 176                         bindhostc++;
 177                         bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 178                         if (bindhost == NULL)
 179                                 errx(1, "Out of memory");
 180                         bindhost[bindhostc-1] = strdup(optarg);
 181                         if (bindhost[bindhostc-1] == NULL)
 182                                 errx(1, "Out of memory");
 183                         break;
 184                 case 'r':
 185                         reregister = 1;
 186                         break;
 187                 case 't':
 188                         tcpflag = 1;
 189                         break;
 190                 case 'u':
 191                         udpflag = 1;
 192                         break;
 193 #ifdef ISO
 194                 case 'c':
 195                         cltpflag = 1;
 196                         break;
 197 #ifdef notyet
 198                 case 'i':
 199                         tp4cnt = 1;
 200                         break;
 201                 case 'p':
 202                         tpipcnt = 1;
 203                         break;
 204 #endif /* notyet */
 205 #endif /* ISO */
 206                 default:
 207                 case '?':
 208                         usage();
 209                 };
 210         if (!tcpflag && !udpflag)
 211                 udpflag = 1;
 212         argv += optind;
 213         argc -= optind;
 214
 215         /*
 216          * XXX
 217          * Backward compatibility, trailing number is the count of daemons.
 218          */
 219         if (argc > 1)
 220                 usage();
 221         if (argc == 1) {
 222                 nfsdcnt = atoi(argv[0]);
 223                 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 224                         warnx("nfsd count %d; reset to %d", nfsdcnt,
 225                             DEFNFSDCNT);
 226                         nfsdcnt = DEFNFSDCNT;
 227                 }
 228         }
 229
 230         if (bindhostc == 0 || bindanyflag) {
 231                 bindhostc++;
 232                 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 233                 if (bindhost == NULL)
 234                         errx(1, "Out of memory");
 235                 bindhost[bindhostc-1] = strdup("*");
 236                 if (bindhost[bindhostc-1] == NULL)
 237                         errx(1, "Out of memory");
 238         }
 239
 240         if (debug == 0) {
 241                 daemon(0, 0);
 242                 signal(SIGHUP, SIG_IGN);
 243                 signal(SIGINT, SIG_IGN);
 244                 signal(SIGQUIT, SIG_IGN);
 245                 signal(SIGSYS, nonfs);
 246                 signal(SIGTERM, SIG_IGN);
 247         }
 248         signal(SIGCHLD, reapchild);
 249
 250         if (reregister) {
 251                 if (udpflag &&
 252                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 253                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)))
 254                         err(1, "can't register with portmap for UDP");
 255                 if (tcpflag &&
 256                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 257                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)))
 258                         err(1, "can't register with portmap for TCP");
 259                 exit(0);
 260         }
 261         openlog("nfsd:", LOG_PID, LOG_DAEMON);
 262
 263         for (i = 0; i < nfsdcnt; i++) {
 264                 switch (fork()) {
 265                 case -1:
 266                         syslog(LOG_ERR, "fork: %m");
 267                         exit (1);
 268                 case 0:
 269                         break;
 270                 default:
 271                         continue;
 272                 }
 273
 274                 setproctitle("server");
 275                 nfssvc_flag = NFSSVC_NFSD;
 276                 nsd.nsd_nfsd = NULL;
 277 #ifdef NFSKERB
 278                 if (sizeof (struct nfsrpc_fullverf) != RPCX_FULLVERF ||
 279                     sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK)
 280                     syslog(LOG_ERR, "Yikes NFSKERB structs not packed!");
 281                 nsd.nsd_authstr = (u_char *)&kt;
 282                 nsd.nsd_authlen = sizeof (kt);
 283                 nsd.nsd_verfstr = (u_char *)&kverf;
 284                 nsd.nsd_verflen = sizeof (kverf);
 285 #endif
 286                 while (nfssvc(nfssvc_flag, &nsd) < 0) {
 287                         if (errno != ENEEDAUTH) {
 288                                 syslog(LOG_ERR, "nfssvc: %m");
 289                                 exit(1);
 290                         }
 291                         nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL;
 292 #ifdef NFSKERB
 293                         /*
 294                          * Get the Kerberos ticket out of the authenticator
 295                          * verify it and convert the principal name to a user
 296                          * name. The user name is then converted to a set of
 297                          * user credentials via the password and group file.
 298                          * Finally, decrypt the timestamp and validate it.
 299                          * For more info see the IETF Draft "Authentication
 300                          * in ONC RPC".
 301                          */
 302                         kt.length = ntohl(kt.length);
 303                         if (gettimeofday(&ktv, (struct timezone *)0) == 0 &&
 304                             kt.length > 0 && kt.length <=
 305                             (RPCAUTH_MAXSIZ - 3 * NFSX_UNSIGNED)) {
 306                             kin.w1 = NFS_KERBW1(kt);
 307                             kt.mbz = 0;
 308                             strcpy(inst, "*");
 309                             if (krb_rd_req(&kt, NFS_KERBSRV,
 310                                 inst, nsd.nsd_haddr, &kauth, "") == RD_AP_OK &&
 311                                 krb_kntoln(&kauth, lnam) == KSUCCESS &&
 312                                 (pwd = getpwnam(lnam)) != NULL) {
 313                                 cr = &nsd.nsd_cr;
 314                                 cr->cr_uid = pwd->pw_uid;
 315                                 cr->cr_groups[0] = pwd->pw_gid;
 316                                 cr->cr_ngroups = 1;
 317                                 setgrent();
 318                                 while ((grp = getgrent()) != NULL) {
 319                                         if (grp->gr_gid == cr->cr_groups[0])
 320                                                 continue;
 321                                         for (cpp = grp->gr_mem;
 322                                             *cpp != NULL; ++cpp)
 323                                                 if (!strcmp(*cpp, lnam))
 324                                                         break;
 325                                         if (*cpp == NULL)
 326                                                 continue;
 327                                         cr->cr_groups[cr->cr_ngroups++]
 328                                             = grp->gr_gid;
 329                                         if (cr->cr_ngroups == NGROUPS)
 330                                                 break;
 331                                 }
 332                                 endgrent();
 333
 334                                 /*
 335                                  * Get the timestamp verifier out of the
 336                                  * authenticator and verifier strings.
 337                                  */
 338                                 kin.t1 = kverf.t1;
 339                                 kin.t2 = kverf.t2;
 340                                 kin.w2 = kverf.w2;
 341                                 bzero((caddr_t)kivec, sizeof (kivec));
 342                                 bcopy((caddr_t)kauth.session,
 343                                     (caddr_t)nsd.nsd_key,sizeof(kauth.session));
 344
 345                                 /*
 346                                  * Decrypt the timestamp verifier in CBC mode.
 347                                  */
 348                                 XXX
 349
 350                                 /*
 351                                  * Validate the timestamp verifier, to
 352                                  * check that the session key is ok.
 353                                  */
 354                                 nsd.nsd_timestamp.tv_sec = ntohl(kout.t1);
 355                                 nsd.nsd_timestamp.tv_usec = ntohl(kout.t2);
 356                                 nsd.nsd_ttl = ntohl(kout.w1);
 357                                 if ((nsd.nsd_ttl - 1) == ntohl(kout.w2))
 358                                     nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN;
 359                         }
 360 #endif /* NFSKERB */
 361                 }
 362                 exit(0);
 363         }
 364
 365         /* If we are serving udp, set up the socket. */
 366         for (i = 0; udpflag && i < bindhostc; i++) {
 367                 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 368                         syslog(LOG_ERR, "can't create udp socket");
 369                         exit(1);
 370                 }
 371                 setbindhost(&inetaddr, bindhost[i]);
 372                 if (bind(sock,
 373                     (struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
 374                         syslog(LOG_ERR, "can't bind udp addr %s: %m", bindhost[i]);
 375                         exit(1);
 376                 }
 377                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 378                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)) {
 379                         syslog(LOG_ERR, "can't register with udp portmap");
 380                         exit(1);
 381                 }
 382                 nfsdargs.sock = sock;
 383                 nfsdargs.name = NULL;
 384                 nfsdargs.namelen = 0;
 385                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 386                         syslog(LOG_ERR, "can't Add UDP socket");
 387                         exit(1);
 388                 }
 389                 close(sock);
 390         }
 391
 392 #ifdef ISO
 393         /* If we are serving cltp, set up the socket. */
 394         if (cltpflag) {
 395                 if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) {
 396                         syslog(LOG_ERR, "can't create cltp socket");
 397                         exit(1);
 398                 }
 399                 memset(&isoaddr, 0, sizeof(isoaddr));
 400                 isoaddr.siso_family = AF_ISO;
 401                 isoaddr.siso_tlen = 2;
 402                 cp = TSEL(&isoaddr);
 403                 *cp++ = (NFS_PORT >> 8);
 404                 *cp = (NFS_PORT & 0xff);
 405                 isoaddr.siso_len = sizeof(isoaddr);
 406                 if (bind(sock,
 407                     (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) {
 408                         syslog(LOG_ERR, "can't bind cltp addr");
 409                         exit(1);
 410                 }
 411 #ifdef notyet
 412                 /*
 413                  * XXX
 414                  * Someday this should probably use "rpcbind", the son of
 415                  * portmap.
 416                  */
 417                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
 418                         syslog(LOG_ERR, "can't register with udp portmap");
 419                         exit(1);
 420                 }
 421 #endif /* notyet */
 422                 nfsdargs.sock = sock;
 423                 nfsdargs.name = NULL;
 424                 nfsdargs.namelen = 0;
 425                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 426                         syslog(LOG_ERR, "can't add UDP socket");
 427                         exit(1);
 428                 }
 429                 close(sock);
 430         }
 431 #endif /* ISO */
 432
 433         /* Now set up the master server socket waiting for tcp connections. */
 434         on = 1;
 435         FD_ZERO(&sockbits);
 436         connect_type_cnt = 0;
 437         for (i = 0; tcpflag && i < bindhostc; i++) {
 438                 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 439                         syslog(LOG_ERR, "can't create tcp socket");
 440                         exit(1);
 441                 }
 442                 if (setsockopt(tcpsock,
 443                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 444                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 445                 setbindhost(&inetaddr, bindhost[i]);
 446                 if (bind(tcpsock,
 447                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 448                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 449                         exit(1);
 450                 }
 451                 if (listen(tcpsock, 5) < 0) {
 452                         syslog(LOG_ERR, "listen failed");
 453                         exit(1);
 454                 }
 455                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 456                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)) {
 457                         syslog(LOG_ERR, "can't register tcp with portmap");
 458                         exit(1);
 459                 }
 460                 FD_SET(tcpsock, &sockbits);
 461                 maxsock = tcpsock;
 462                 connect_type_cnt++;
 463         }
 464
 465 #ifdef notyet
 466         /* Now set up the master server socket waiting for tp4 connections. */
 467         if (tp4flag) {
 468                 if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) {
 469                         syslog(LOG_ERR, "can't create tp4 socket");
 470                         exit(1);
 471                 }
 472                 if (setsockopt(tp4sock,
 473                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 474                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 475                 memset(&isoaddr, 0, sizeof(isoaddr));
 476                 isoaddr.siso_family = AF_ISO;
 477                 isoaddr.siso_tlen = 2;
 478                 cp = TSEL(&isoaddr);
 479                 *cp++ = (NFS_PORT >> 8);
 480                 *cp = (NFS_PORT & 0xff);
 481                 isoaddr.siso_len = sizeof(isoaddr);
 482                 if (bind(tp4sock,
 483                     (struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) {
 484                         syslog(LOG_ERR, "can't bind tp4 addr");
 485                         exit(1);
 486                 }
 487                 if (listen(tp4sock, 5) < 0) {
 488                         syslog(LOG_ERR, "listen failed");
 489                         exit(1);
 490                 }
 491                 /*
 492                  * XXX
 493                  * Someday this should probably use "rpcbind", the son of
 494                  * portmap.
 495                  */
 496                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 497                         syslog(LOG_ERR, "can't register tcp with portmap");
 498                         exit(1);
 499                 }
 500                 FD_SET(tp4sock, &sockbits);
 501                 maxsock = tp4sock;
 502                 connect_type_cnt++;
 503         }
 504
 505         /* Now set up the master server socket waiting for tpip connections. */
 506         for (i = 0; tpipflag && i < bindhostc; i++) {
 507                 if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
 508                         syslog(LOG_ERR, "can't create tpip socket");
 509                         exit(1);
 510                 }
 511                 if (setsockopt(tpipsock,
 512                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 513                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 514                 setbindhost(&inetaddr, bindhost[i]);
 515                 if (bind(tpipsock,
 516                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 517                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 518                         exit(1);
 519                 }
 520                 if (listen(tpipsock, 5) < 0) {
 521                         syslog(LOG_ERR, "listen failed");
 522                         exit(1);
 523                 }
 524                 /*
 525                  * XXX
 526                  * Someday this should probably use "rpcbind", the son of
 527                  * portmap.
 528                  */
 529                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 530                         syslog(LOG_ERR, "can't register tcp with portmap");
 531                         exit(1);
 532                 }
 533                 FD_SET(tpipsock, &sockbits);
 534                 maxsock = tpipsock;
 535                 connect_type_cnt++;
 536         }
 537 #endif /* notyet */
 538
 539         if (connect_type_cnt == 0)
 540                 exit(0);
 541
 542         setproctitle("master");
 543
 544         /*
 545          * Loop forever accepting connections and passing the sockets
 546          * into the kernel for the mounts.
 547          */
 548         for (;;) {
 549                 ready = sockbits;
 550                 if (connect_type_cnt > 1) {
 551                         if (select(maxsock + 1,
 552                             &ready, NULL, NULL, NULL) < 1) {
 553                                 syslog(LOG_ERR, "select failed: %m");
 554                                 exit(1);
 555                         }
 556                 }
 557                 if (tcpflag && FD_ISSET(tcpsock, &ready)) {
 558                         len = sizeof(inetpeer);
 559                         if ((msgsock = accept(tcpsock,
 560                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 561                                 syslog(LOG_ERR, "accept failed: %m");
 562                                 exit(1);
 563                         }
 564                         memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero));
 565                         if (setsockopt(msgsock, SOL_SOCKET,
 566                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 567                                 syslog(LOG_ERR,
 568                                     "setsockopt SO_KEEPALIVE: %m");
 569                         nfsdargs.sock = msgsock;
 570                         nfsdargs.name = (caddr_t)&inetpeer;
 571                         nfsdargs.namelen = sizeof(inetpeer);
 572                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 573                         close(msgsock);
 574                 }
 575 #ifdef notyet
 576                 if (tp4flag && FD_ISSET(tp4sock, &ready)) {
 577                         len = sizeof(isopeer);
 578                         if ((msgsock = accept(tp4sock,
 579                             (struct sockaddr *)&isopeer, &len)) < 0) {
 580                                 syslog(LOG_ERR, "accept failed: %m");
 581                                 exit(1);
 582                         }
 583                         if (setsockopt(msgsock, SOL_SOCKET,
 584                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 585                                 syslog(LOG_ERR,
 586                                     "setsockopt SO_KEEPALIVE: %m");
 587                         nfsdargs.sock = msgsock;
 588                         nfsdargs.name = (caddr_t)&isopeer;
 589                         nfsdargs.namelen = len;
 590                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 591                         close(msgsock);
 592                 }
 593                 if (tpipflag && FD_ISSET(tpipsock, &ready)) {
 594                         len = sizeof(inetpeer);
 595                         if ((msgsock = accept(tpipsock,
 596                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 597                                 syslog(LOG_ERR, "accept failed: %m");
 598                                 exit(1);
 599                         }
 600                         if (setsockopt(msgsock, SOL_SOCKET,
 601                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 602                                 syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m");
 603                         nfsdargs.sock = msgsock;
 604                         nfsdargs.name = (caddr_t)&inetpeer;
 605                         nfsdargs.namelen = len;
 606                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 607                         close(msgsock);
 608                 }
 609 #endif /* notyet */
 610         }
 611 }
 612
 613 void
 614 setbindhost(struct sockaddr_in *ia, const char *bindhost)
 615 {
 616         ia->sin_family = AF_INET;
 617         ia->sin_port = htons(NFS_PORT);
 618         ia->sin_len = sizeof(*ia);
 619         if (bindhost == NULL || strcmp(bindhost,"*") == 0) {
 620                 ia->sin_addr.s_addr = INADDR_ANY;
 621         } else {
 622                 if (inet_aton(bindhost, &ia->sin_addr) == 0) {
 623                         struct hostent *he;
 624
 625                         he = gethostbyname2(bindhost, ia->sin_family);
 626                         if (he == NULL) {
 627                                 syslog(LOG_ERR, "gethostbyname of %s failed", bindhost);
 628                                 exit(1);
 629                         }
 630                         bcopy(he->h_addr, &ia->sin_addr, he->h_length);
 631                 }
 632         }
 633 }
 634
 635 void
 636 usage(void)
 637 {
 638         fprintf(stderr, "usage: nfsd %s\n", USAGE);
 639         exit(1);
 640 }
 641
 642 void
 643 nonfs(int signo)
 644 {
 645         syslog(LOG_ERR, "missing system call: NFS not available");
 646 }
 647
 648 void
 649 reapchild(int signo)
 650 {
 651
 652         while (wait3(NULL, WNOHANG, NULL) > 0);
 653 }