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 1.6 2004/02/04 17:40:00 joerg 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(int);
  93 void    reapchild(int);
  94 void    setbindhost(struct sockaddr_in *ia, const char *bindhost);
  95 #ifdef OLD_SETPROCTITLE
  96 #ifdef __FreeBSD__
  97 void    setproctitle(char *);
  98 #endif
  99 #endif
 100 void    usage(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(int argc, char **argv, char **envp)
 123 {
 124         struct nfsd_args nfsdargs;
 125         struct sockaddr_in inetaddr, inetpeer;
 126 #ifdef ISO
 127         struct sockaddr_iso isoaddr, isopeer;
 128         char *cp;
 129 #endif
 130         fd_set ready, sockbits;
 131         int ch, cltpflag, connect_type_cnt, i, len, maxsock = -1, msgsock;
 132         int nfsdcnt, nfssvc_flag, on, reregister, sock, tcpflag, tcpsock = -1;
 133         int tp4cnt, tp4flag, tpipcnt, tpipflag, udpflag;
 134         int bindhostc = 0, bindanyflag;
 135         char **bindhost = NULL;
 136 #ifdef notyet
 137         int tp4sock, tpipsock;
 138 #endif
 139 #ifdef NFSKERB
 140         struct group *grp;
 141         struct passwd *pwd;
 142         struct ucred *cr;
 143         struct timeval ktv;
 144         char **cpp;
 145 #endif
 146 #ifdef __FreeBSD__
 147         struct vfsconf vfc;
 148         int error;
 149
 150         error = getvfsbyname("nfs", &vfc);
 151         if (error && vfsisloadable("nfs")) {
 152                 if (vfsload("nfs"))
 153                         err(1, "vfsload(nfs)");
 154                 endvfsent();    /* flush cache */
 155                 error = getvfsbyname("nfs", &vfc);
 156         }
 157         if (error)
 158                 errx(1, "NFS is not available in the running kernel");
 159 #endif
 160
 161 #ifdef OLD_SETPROCTITLE
 162         /* Save start and extent of argv for setproctitle. */
 163         Argv = argv;
 164         if (envp == 0 || *envp == 0)
 165                 envp = argv;
 166         while (*envp)
 167                 envp++;
 168         LastArg = envp[-1] + strlen(envp[-1]);
 169 #endif
 170
 171 #define MAXNFSDCNT      20
 172 #define DEFNFSDCNT       4
 173         nfsdcnt = DEFNFSDCNT;
 174         cltpflag = reregister = tcpflag = tp4cnt = tp4flag = tpipcnt = 0;
 175         bindanyflag = tpipflag = udpflag = 0;
 176 #ifdef ISO
 177 #define GETOPT  "ach:n:rtu"
 178 #define USAGE   "[-acrtu] [-n num_servers] [-h bindip]"
 179 #else
 180 #define GETOPT  "ah:n:rtu"
 181 #define USAGE   "[-artu] [-n num_servers] [-h bindip]"
 182 #endif
 183         while ((ch = getopt(argc, argv, GETOPT)) != -1)
 184                 switch (ch) {
 185                 case 'a':
 186                         bindanyflag = 1;
 187                         break;
 188                 case 'n':
 189                         nfsdcnt = atoi(optarg);
 190                         if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 191                                 warnx("nfsd count %d; reset to %d", nfsdcnt,
 192                                     DEFNFSDCNT);
 193                                 nfsdcnt = DEFNFSDCNT;
 194                         }
 195                         break;
 196                 case 'h':
 197                         bindhostc++;
 198                         bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 199                         if (bindhost == NULL)
 200                                 errx(1, "Out of memory");
 201                         bindhost[bindhostc-1] = strdup(optarg);
 202                         if (bindhost[bindhostc-1] == NULL)
 203                                 errx(1, "Out of memory");
 204                         break;
 205                 case 'r':
 206                         reregister = 1;
 207                         break;
 208                 case 't':
 209                         tcpflag = 1;
 210                         break;
 211                 case 'u':
 212                         udpflag = 1;
 213                         break;
 214 #ifdef ISO
 215                 case 'c':
 216                         cltpflag = 1;
 217                         break;
 218 #ifdef notyet
 219                 case 'i':
 220                         tp4cnt = 1;
 221                         break;
 222                 case 'p':
 223                         tpipcnt = 1;
 224                         break;
 225 #endif /* notyet */
 226 #endif /* ISO */
 227                 default:
 228                 case '?':
 229                         usage();
 230                 };
 231         if (!tcpflag && !udpflag)
 232                 udpflag = 1;
 233         argv += optind;
 234         argc -= optind;
 235
 236         /*
 237          * XXX
 238          * Backward compatibility, trailing number is the count of daemons.
 239          */
 240         if (argc > 1)
 241                 usage();
 242         if (argc == 1) {
 243                 nfsdcnt = atoi(argv[0]);
 244                 if (nfsdcnt < 1 || nfsdcnt > MAXNFSDCNT) {
 245                         warnx("nfsd count %d; reset to %d", nfsdcnt,
 246                             DEFNFSDCNT);
 247                         nfsdcnt = DEFNFSDCNT;
 248                 }
 249         }
 250
 251         if (bindhostc == 0 || bindanyflag) {
 252                 bindhostc++;
 253                 bindhost = realloc(bindhost,sizeof(char *)*bindhostc);
 254                 if (bindhost == NULL)
 255                         errx(1, "Out of memory");
 256                 bindhost[bindhostc-1] = strdup("*");
 257                 if (bindhost[bindhostc-1] == NULL)
 258                         errx(1, "Out of memory");
 259         }
 260
 261         if (debug == 0) {
 262                 daemon(0, 0);
 263                 (void)signal(SIGHUP, SIG_IGN);
 264                 (void)signal(SIGINT, SIG_IGN);
 265                 (void)signal(SIGQUIT, SIG_IGN);
 266                 (void)signal(SIGSYS, nonfs);
 267                 (void)signal(SIGTERM, SIG_IGN);
 268         }
 269         (void)signal(SIGCHLD, reapchild);
 270
 271         if (reregister) {
 272                 if (udpflag &&
 273                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 274                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)))
 275                         err(1, "can't register with portmap for UDP");
 276                 if (tcpflag &&
 277                     (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 278                      !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)))
 279                         err(1, "can't register with portmap for TCP");
 280                 exit(0);
 281         }
 282         openlog("nfsd:", LOG_PID, LOG_DAEMON);
 283
 284         for (i = 0; i < nfsdcnt; i++) {
 285                 switch (fork()) {
 286                 case -1:
 287                         syslog(LOG_ERR, "fork: %m");
 288                         exit (1);
 289                 case 0:
 290                         break;
 291                 default:
 292                         continue;
 293                 }
 294
 295                 setproctitle("server");
 296                 nfssvc_flag = NFSSVC_NFSD;
 297                 nsd.nsd_nfsd = NULL;
 298 #ifdef NFSKERB
 299                 if (sizeof (struct nfsrpc_fullverf) != RPCX_FULLVERF ||
 300                     sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK)
 301                     syslog(LOG_ERR, "Yikes NFSKERB structs not packed!");
 302                 nsd.nsd_authstr = (u_char *)&kt;
 303                 nsd.nsd_authlen = sizeof (kt);
 304                 nsd.nsd_verfstr = (u_char *)&kverf;
 305                 nsd.nsd_verflen = sizeof (kverf);
 306 #endif
 307                 while (nfssvc(nfssvc_flag, &nsd) < 0) {
 308                         if (errno != ENEEDAUTH) {
 309                                 syslog(LOG_ERR, "nfssvc: %m");
 310                                 exit(1);
 311                         }
 312                         nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHINFAIL;
 313 #ifdef NFSKERB
 314                         /*
 315                          * Get the Kerberos ticket out of the authenticator
 316                          * verify it and convert the principal name to a user
 317                          * name. The user name is then converted to a set of
 318                          * user credentials via the password and group file.
 319                          * Finally, decrypt the timestamp and validate it.
 320                          * For more info see the IETF Draft "Authentication
 321                          * in ONC RPC".
 322                          */
 323                         kt.length = ntohl(kt.length);
 324                         if (gettimeofday(&ktv, (struct timezone *)0) == 0 &&
 325                             kt.length > 0 && kt.length <=
 326                             (RPCAUTH_MAXSIZ - 3 * NFSX_UNSIGNED)) {
 327                             kin.w1 = NFS_KERBW1(kt);
 328                             kt.mbz = 0;
 329                             (void)strcpy(inst, "*");
 330                             if (krb_rd_req(&kt, NFS_KERBSRV,
 331                                 inst, nsd.nsd_haddr, &kauth, "") == RD_AP_OK &&
 332                                 krb_kntoln(&kauth, lnam) == KSUCCESS &&
 333                                 (pwd = getpwnam(lnam)) != NULL) {
 334                                 cr = &nsd.nsd_cr;
 335                                 cr->cr_uid = pwd->pw_uid;
 336                                 cr->cr_groups[0] = pwd->pw_gid;
 337                                 cr->cr_ngroups = 1;
 338                                 setgrent();
 339                                 while ((grp = getgrent()) != NULL) {
 340                                         if (grp->gr_gid == cr->cr_groups[0])
 341                                                 continue;
 342                                         for (cpp = grp->gr_mem;
 343                                             *cpp != NULL; ++cpp)
 344                                                 if (!strcmp(*cpp, lnam))
 345                                                         break;
 346                                         if (*cpp == NULL)
 347                                                 continue;
 348                                         cr->cr_groups[cr->cr_ngroups++]
 349                                             = grp->gr_gid;
 350                                         if (cr->cr_ngroups == NGROUPS)
 351                                                 break;
 352                                 }
 353                                 endgrent();
 354
 355                                 /*
 356                                  * Get the timestamp verifier out of the
 357                                  * authenticator and verifier strings.
 358                                  */
 359                                 kin.t1 = kverf.t1;
 360                                 kin.t2 = kverf.t2;
 361                                 kin.w2 = kverf.w2;
 362                                 bzero((caddr_t)kivec, sizeof (kivec));
 363                                 bcopy((caddr_t)kauth.session,
 364                                     (caddr_t)nsd.nsd_key,sizeof(kauth.session));
 365
 366                                 /*
 367                                  * Decrypt the timestamp verifier in CBC mode.
 368                                  */
 369                                 XXX
 370
 371                                 /*
 372                                  * Validate the timestamp verifier, to
 373                                  * check that the session key is ok.
 374                                  */
 375                                 nsd.nsd_timestamp.tv_sec = ntohl(kout.t1);
 376                                 nsd.nsd_timestamp.tv_usec = ntohl(kout.t2);
 377                                 nsd.nsd_ttl = ntohl(kout.w1);
 378                                 if ((nsd.nsd_ttl - 1) == ntohl(kout.w2))
 379                                     nfssvc_flag = NFSSVC_NFSD | NFSSVC_AUTHIN;
 380                         }
 381 #endif /* NFSKERB */
 382                 }
 383                 exit(0);
 384         }
 385
 386         /* If we are serving udp, set up the socket. */
 387         for (i = 0; udpflag && i < bindhostc; i++) {
 388                 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 389                         syslog(LOG_ERR, "can't create udp socket");
 390                         exit(1);
 391                 }
 392                 setbindhost(&inetaddr, bindhost[i]);
 393                 if (bind(sock,
 394                     (struct sockaddr *)&inetaddr, sizeof(inetaddr)) < 0) {
 395                         syslog(LOG_ERR, "can't bind udp addr %s: %m", bindhost[i]);
 396                         exit(1);
 397                 }
 398                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_UDP, NFS_PORT) ||
 399                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_UDP, NFS_PORT)) {
 400                         syslog(LOG_ERR, "can't register with udp portmap");
 401                         exit(1);
 402                 }
 403                 nfsdargs.sock = sock;
 404                 nfsdargs.name = NULL;
 405                 nfsdargs.namelen = 0;
 406                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 407                         syslog(LOG_ERR, "can't Add UDP socket");
 408                         exit(1);
 409                 }
 410                 (void)close(sock);
 411         }
 412
 413 #ifdef ISO
 414         /* If we are serving cltp, set up the socket. */
 415         if (cltpflag) {
 416                 if ((sock = socket(AF_ISO, SOCK_DGRAM, 0)) < 0) {
 417                         syslog(LOG_ERR, "can't create cltp socket");
 418                         exit(1);
 419                 }
 420                 memset(&isoaddr, 0, sizeof(isoaddr));
 421                 isoaddr.siso_family = AF_ISO;
 422                 isoaddr.siso_tlen = 2;
 423                 cp = TSEL(&isoaddr);
 424                 *cp++ = (NFS_PORT >> 8);
 425                 *cp = (NFS_PORT & 0xff);
 426                 isoaddr.siso_len = sizeof(isoaddr);
 427                 if (bind(sock,
 428                     (struct sockaddr *)&isoaddr, sizeof(isoaddr)) < 0) {
 429                         syslog(LOG_ERR, "can't bind cltp addr");
 430                         exit(1);
 431                 }
 432 #ifdef notyet
 433                 /*
 434                  * XXX
 435                  * Someday this should probably use "rpcbind", the son of
 436                  * portmap.
 437                  */
 438                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_UDP, NFS_PORT)) {
 439                         syslog(LOG_ERR, "can't register with udp portmap");
 440                         exit(1);
 441                 }
 442 #endif /* notyet */
 443                 nfsdargs.sock = sock;
 444                 nfsdargs.name = NULL;
 445                 nfsdargs.namelen = 0;
 446                 if (nfssvc(NFSSVC_ADDSOCK, &nfsdargs) < 0) {
 447                         syslog(LOG_ERR, "can't add UDP socket");
 448                         exit(1);
 449                 }
 450                 close(sock);
 451         }
 452 #endif /* ISO */
 453
 454         /* Now set up the master server socket waiting for tcp connections. */
 455         on = 1;
 456         FD_ZERO(&sockbits);
 457         connect_type_cnt = 0;
 458         for (i = 0; tcpflag && i < bindhostc; i++) {
 459                 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 460                         syslog(LOG_ERR, "can't create tcp socket");
 461                         exit(1);
 462                 }
 463                 if (setsockopt(tcpsock,
 464                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 465                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 466                 setbindhost(&inetaddr, bindhost[i]);
 467                 if (bind(tcpsock,
 468                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 469                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 470                         exit(1);
 471                 }
 472                 if (listen(tcpsock, 5) < 0) {
 473                         syslog(LOG_ERR, "listen failed");
 474                         exit(1);
 475                 }
 476                 if (!pmap_set(RPCPROG_NFS, 2, IPPROTO_TCP, NFS_PORT) ||
 477                     !pmap_set(RPCPROG_NFS, 3, IPPROTO_TCP, NFS_PORT)) {
 478                         syslog(LOG_ERR, "can't register tcp with portmap");
 479                         exit(1);
 480                 }
 481                 FD_SET(tcpsock, &sockbits);
 482                 maxsock = tcpsock;
 483                 connect_type_cnt++;
 484         }
 485
 486 #ifdef notyet
 487         /* Now set up the master server socket waiting for tp4 connections. */
 488         if (tp4flag) {
 489                 if ((tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)) < 0) {
 490                         syslog(LOG_ERR, "can't create tp4 socket");
 491                         exit(1);
 492                 }
 493                 if (setsockopt(tp4sock,
 494                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 495                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 496                 memset(&isoaddr, 0, sizeof(isoaddr));
 497                 isoaddr.siso_family = AF_ISO;
 498                 isoaddr.siso_tlen = 2;
 499                 cp = TSEL(&isoaddr);
 500                 *cp++ = (NFS_PORT >> 8);
 501                 *cp = (NFS_PORT & 0xff);
 502                 isoaddr.siso_len = sizeof(isoaddr);
 503                 if (bind(tp4sock,
 504                     (struct sockaddr *)&isoaddr, sizeof (isoaddr)) < 0) {
 505                         syslog(LOG_ERR, "can't bind tp4 addr");
 506                         exit(1);
 507                 }
 508                 if (listen(tp4sock, 5) < 0) {
 509                         syslog(LOG_ERR, "listen failed");
 510                         exit(1);
 511                 }
 512                 /*
 513                  * XXX
 514                  * Someday this should probably use "rpcbind", the son of
 515                  * portmap.
 516                  */
 517                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 518                         syslog(LOG_ERR, "can't register tcp with portmap");
 519                         exit(1);
 520                 }
 521                 FD_SET(tp4sock, &sockbits);
 522                 maxsock = tp4sock;
 523                 connect_type_cnt++;
 524         }
 525
 526         /* Now set up the master server socket waiting for tpip connections. */
 527         for (i = 0; tpipflag && i < bindhostc; i++) {
 528                 if ((tpipsock = socket(AF_INET, SOCK_SEQPACKET, 0)) < 0) {
 529                         syslog(LOG_ERR, "can't create tpip socket");
 530                         exit(1);
 531                 }
 532                 if (setsockopt(tpipsock,
 533                     SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
 534                         syslog(LOG_ERR, "setsockopt SO_REUSEADDR: %m");
 535                 setbindhost(&inetaddr, bindhost[i]);
 536                 if (bind(tpipsock,
 537                     (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) {
 538                         syslog(LOG_ERR, "can't bind tcp addr %s: %m", bindhost[i]);
 539                         exit(1);
 540                 }
 541                 if (listen(tpipsock, 5) < 0) {
 542                         syslog(LOG_ERR, "listen failed");
 543                         exit(1);
 544                 }
 545                 /*
 546                  * XXX
 547                  * Someday this should probably use "rpcbind", the son of
 548                  * portmap.
 549                  */
 550                 if (!pmap_set(RPCPROG_NFS, NFS_VER2, IPPROTO_TCP, NFS_PORT)) {
 551                         syslog(LOG_ERR, "can't register tcp with portmap");
 552                         exit(1);
 553                 }
 554                 FD_SET(tpipsock, &sockbits);
 555                 maxsock = tpipsock;
 556                 connect_type_cnt++;
 557         }
 558 #endif /* notyet */
 559
 560         if (connect_type_cnt == 0)
 561                 exit(0);
 562
 563         setproctitle("master");
 564
 565         /*
 566          * Loop forever accepting connections and passing the sockets
 567          * into the kernel for the mounts.
 568          */
 569         for (;;) {
 570                 ready = sockbits;
 571                 if (connect_type_cnt > 1) {
 572                         if (select(maxsock + 1,
 573                             &ready, NULL, NULL, NULL) < 1) {
 574                                 syslog(LOG_ERR, "select failed: %m");
 575                                 exit(1);
 576                         }
 577                 }
 578                 if (tcpflag && FD_ISSET(tcpsock, &ready)) {
 579                         len = sizeof(inetpeer);
 580                         if ((msgsock = accept(tcpsock,
 581                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 582                                 syslog(LOG_ERR, "accept failed: %m");
 583                                 exit(1);
 584                         }
 585                         memset(inetpeer.sin_zero, 0, sizeof(inetpeer.sin_zero));
 586                         if (setsockopt(msgsock, SOL_SOCKET,
 587                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 588                                 syslog(LOG_ERR,
 589                                     "setsockopt SO_KEEPALIVE: %m");
 590                         nfsdargs.sock = msgsock;
 591                         nfsdargs.name = (caddr_t)&inetpeer;
 592                         nfsdargs.namelen = sizeof(inetpeer);
 593                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 594                         (void)close(msgsock);
 595                 }
 596 #ifdef notyet
 597                 if (tp4flag && FD_ISSET(tp4sock, &ready)) {
 598                         len = sizeof(isopeer);
 599                         if ((msgsock = accept(tp4sock,
 600                             (struct sockaddr *)&isopeer, &len)) < 0) {
 601                                 syslog(LOG_ERR, "accept failed: %m");
 602                                 exit(1);
 603                         }
 604                         if (setsockopt(msgsock, SOL_SOCKET,
 605                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 606                                 syslog(LOG_ERR,
 607                                     "setsockopt SO_KEEPALIVE: %m");
 608                         nfsdargs.sock = msgsock;
 609                         nfsdargs.name = (caddr_t)&isopeer;
 610                         nfsdargs.namelen = len;
 611                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 612                         (void)close(msgsock);
 613                 }
 614                 if (tpipflag && FD_ISSET(tpipsock, &ready)) {
 615                         len = sizeof(inetpeer);
 616                         if ((msgsock = accept(tpipsock,
 617                             (struct sockaddr *)&inetpeer, &len)) < 0) {
 618                                 syslog(LOG_ERR, "accept failed: %m");
 619                                 exit(1);
 620                         }
 621                         if (setsockopt(msgsock, SOL_SOCKET,
 622                             SO_KEEPALIVE, (char *)&on, sizeof(on)) < 0)
 623                                 syslog(LOG_ERR, "setsockopt SO_KEEPALIVE: %m");
 624                         nfsdargs.sock = msgsock;
 625                         nfsdargs.name = (caddr_t)&inetpeer;
 626                         nfsdargs.namelen = len;
 627                         nfssvc(NFSSVC_ADDSOCK, &nfsdargs);
 628                         (void)close(msgsock);
 629                 }
 630 #endif /* notyet */
 631         }
 632 }
 633
 634 void
 635 setbindhost(struct sockaddr_in *ia, const char *bindhost)
 636 {
 637         ia->sin_family = AF_INET;
 638         ia->sin_port = htons(NFS_PORT);
 639         ia->sin_len = sizeof(*ia);
 640         if (bindhost == NULL || strcmp(bindhost,"*") == 0) {
 641                 ia->sin_addr.s_addr = INADDR_ANY;
 642         } else {
 643                 if (inet_aton(bindhost, &ia->sin_addr) == 0) {
 644                         struct hostent *he;
 645
 646                         he = gethostbyname2(bindhost, ia->sin_family);
 647                         if (he == NULL) {
 648                                 syslog(LOG_ERR, "gethostbyname of %s failed", bindhost);
 649                                 exit(1);
 650                         }
 651                         bcopy(he->h_addr, &ia->sin_addr, he->h_length);
 652                 }
 653         }
 654 }
 655
 656 void
 657 usage(void)
 658 {
 659         (void)fprintf(stderr, "usage: nfsd %s\n", USAGE);
 660         exit(1);
 661 }
 662
 663 void
 664 nonfs(int signo)
 665 {
 666         syslog(LOG_ERR, "missing system call: NFS not available");
 667 }
 668
 669 void
 670 reapchild(int signo)
 671 {
 672
 673         while (wait3(NULL, WNOHANG, NULL) > 0);
 674 }
 675
 676 #ifdef OLD_SETPROCTITLE
 677 #ifdef __FreeBSD__
 678 void
 679 setproctitle(char *a)
 680 {
 681         register char *cp;
 682         char buf[80];
 683
 684         cp = Argv[0];
 685         (void)snprintf(buf, sizeof(buf), "nfsd-%s", a);
 686         (void)strncpy(cp, buf, LastArg - cp);
 687         cp += strlen(cp);
 688         while (cp < LastArg)
 689                 *cp++ = '\0';
 690         Argv[1] = NULL;
 691 }
 692 #endif  /* __FreeBSD__ */
 693 #endif