xref: /freebsd-11-stable/usr.sbin/rpc.lockd/lockd.c

/*
 * Copyright (c) 1995
 *	A.R. Gordon (andrew.gordon@net-tel.co.uk).  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed for the FreeBSD project
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */


/* main() function for NFS lock daemon.  Most of the code in this	*/
/* file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x	*/
/* The actual program logic is in the file procs.c			*/

#include "lockd.h"


int debug_level = 0;	/* Zero means no debugging syslog() calls	*/


static void nlm_prog_1();
static void nlm_prog_3();

main(int argc, char **argv)
{
  SVCXPRT *transp;

  if (argc > 1)
  {
    if (strncmp(argv[1], "-d", 2))
    {
      fprintf(stderr, "Usage: rpc.lockd [-d [<debuglevel>]]\n");
      exit(1);
    }
    if (argc > 2) debug_level = atoi(argv[2]);
    else debug_level = atoi(argv[1] + 2);
    /* Ensure at least some debug if -d with no specified level		*/
    if (!debug_level) debug_level = 1;
  }

  (void)pmap_unset(NLM_PROG, NLM_VERS);
  (void)pmap_unset(NLM_PROG, NLM_VERSX);

  transp = svcudp_create(RPC_ANYSOCK);
  if (transp == NULL)
  {
    (void)fprintf(stderr, "cannot create udp service.\n");
    exit(1);
  }
  if (!svc_register(transp, NLM_PROG, NLM_VERS, nlm_prog_1, IPPROTO_UDP))
  {
    (void)fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS, udp).\n");
    exit(1);
  }
  if (!svc_register(transp, NLM_PROG, NLM_VERSX, nlm_prog_3, IPPROTO_UDP))
  {
    (void)fprintf(stderr, "unable to register (NLM_PROG, NLM_VERSX, udp).\n");
    exit(1);
  }

  transp = svctcp_create(RPC_ANYSOCK, 0, 0);
  if (transp == NULL)
  {
    (void)fprintf(stderr, "cannot create tcp service.\n");
    exit(1);
  }
  if (!svc_register(transp, NLM_PROG, NLM_VERS, nlm_prog_1, IPPROTO_TCP))
  {
    (void)fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS, tcp).\n");
    exit(1);
  }
  if (!svc_register(transp, NLM_PROG, NLM_VERSX, nlm_prog_3, IPPROTO_TCP))
  {
    (void)fprintf(stderr, "unable to register (NLM_PROG, NLM_VERSX, tcp).\n");
    exit(1);
  }

  /* Note that it is NOT sensible to run this program from inetd - the 	*/
  /* protocol assumes that it will run immediately at boot time.	*/
  daemon(0, 0);

  openlog("rpc.lockd", 0, LOG_DAEMON);
  if (debug_level) syslog(LOG_INFO, "Starting, debug level %d", debug_level);
  else syslog(LOG_INFO, "Starting");

  svc_run();	/* Should never return					*/
  exit(1);
}

static void
nlm_prog_1(struct svc_req *rqstp, SVCXPRT *transp)
{
  union
  {
    struct nlm_testargs nlm_test_1_arg;
    struct nlm_lockargs nlm_lock_1_arg;
    struct nlm_cancargs nlm_cancel_1_arg;
    struct nlm_unlockargs nlm_unlock_1_arg;
    struct nlm_testargs nlm_granted_1_arg;
    struct nlm_testargs nlm_test_msg_1_arg;
    struct nlm_lockargs nlm_lock_msg_1_arg;
    struct nlm_cancargs nlm_cancel_msg_1_arg;
    struct nlm_unlockargs nlm_unlock_msg_1_arg;
    struct nlm_testargs nlm_granted_msg_1_arg;
    nlm_testres nlm_test_res_1_arg;
    nlm_res nlm_lock_res_1_arg;
    nlm_res nlm_cancel_res_1_arg;
    nlm_res nlm_unlock_res_1_arg;
    nlm_res nlm_granted_res_1_arg;
  } argument;
  char *result;
  bool_t (*xdr_argument)(), (*xdr_result)();
  char *(*local)();

  switch (rqstp->rq_proc)
  {
    case NULLPROC:
      (void)svc_sendreply(transp, xdr_void, (char *)NULL);
      return;

    case NLM_TEST:
      xdr_argument = xdr_nlm_testargs;
      xdr_result = xdr_nlm_testres;
      local = (char *(*)()) nlm_test_1;
      break;

    case NLM_LOCK:
      xdr_argument = xdr_nlm_lockargs;
      xdr_result = xdr_nlm_res;
      local = (char *(*)()) nlm_lock_1;
      break;

    case NLM_CANCEL:
      xdr_argument = xdr_nlm_cancargs;
      xdr_result = xdr_nlm_res;
      local = (char *(*)()) nlm_cancel_1;
      break;

    case NLM_UNLOCK:
      xdr_argument = xdr_nlm_unlockargs;
      xdr_result = xdr_nlm_res;
      local = (char *(*)()) nlm_unlock_1;
      break;

    case NLM_GRANTED:
      xdr_argument = xdr_nlm_testargs;
      xdr_result = xdr_nlm_res;
      local = (char *(*)()) nlm_granted_1;
      break;

    case NLM_TEST_MSG:
      xdr_argument = xdr_nlm_testargs;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_test_msg_1;
      break;

    case NLM_LOCK_MSG:
      xdr_argument = xdr_nlm_lockargs;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_lock_msg_1;
      break;

    case NLM_CANCEL_MSG:
      xdr_argument = xdr_nlm_cancargs;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_cancel_msg_1;
      break;

    case NLM_UNLOCK_MSG:
      xdr_argument = xdr_nlm_unlockargs;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_unlock_msg_1;
      break;

    case NLM_GRANTED_MSG:
      xdr_argument = xdr_nlm_testargs;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_granted_msg_1;
      break;

    case NLM_TEST_RES:
      xdr_argument = xdr_nlm_testres;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_test_res_1;
      break;

    case NLM_LOCK_RES:
      xdr_argument = xdr_nlm_res;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_lock_res_1;
      break;

    case NLM_CANCEL_RES:
      xdr_argument = xdr_nlm_res;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_cancel_res_1;
      break;

    case NLM_UNLOCK_RES:
      xdr_argument = xdr_nlm_res;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_unlock_res_1;
      break;

    case NLM_GRANTED_RES:
      xdr_argument = xdr_nlm_res;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_granted_res_1;
      break;

    default:
      svcerr_noproc(transp);
      return;
  }
  bzero((char *)&argument, sizeof(argument));
  if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument))
  {
    syslog(LOG_ERR, "RPC received with invalid arguments");
    svcerr_decode(transp);
    return;
  }
  result = (*local)(&argument, rqstp);
  if (result != NULL && !svc_sendreply(transp, xdr_result, result))
  {
    svcerr_systemerr(transp);
  }
  if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument))
  {
    syslog(LOG_ERR, "unable to free arguments");
  }

}


static void
nlm_prog_3(struct svc_req *rqstp, SVCXPRT *transp)
{
  union
  {
    nlm_shareargs nlm_share_3_arg;
    nlm_shareargs nlm_unshare_3_arg;
    nlm_lockargs nlm_nm_lock_3_arg;
    nlm_notify nlm_free_all_3_arg;
  } argument;
  char *result;
  bool_t (*xdr_argument)(), (*xdr_result)();
  char *(*local)();

  switch (rqstp->rq_proc)
  {
    case NULLPROC:
      (void)svc_sendreply(transp, xdr_void, (char *)NULL);
      return;

    case NLM_SHARE:
      xdr_argument = xdr_nlm_shareargs;
      xdr_result = xdr_nlm_shareres;
      local = (char *(*)()) nlm_share_3;
      break;

    case NLM_UNSHARE:
      xdr_argument = xdr_nlm_shareargs;
      xdr_result = xdr_nlm_shareres;
      local = (char *(*)()) nlm_unshare_3;
      break;

    case NLM_NM_LOCK:
      xdr_argument = xdr_nlm_lockargs;
      xdr_result = xdr_nlm_res;
      local = (char *(*)()) nlm_nm_lock_3;
      break;

    case NLM_FREE_ALL:
      xdr_argument = xdr_nlm_notify;
      xdr_result = xdr_void;
      local = (char *(*)()) nlm_free_all_3;
      break;

    default:
      svcerr_noproc(transp);
      return;
  }
  bzero((char *)&argument, sizeof(argument));
  if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument))
  {
    syslog(LOG_ERR, "RPC received with invalid arguments");
    svcerr_decode(transp);
    return;
  }
  result = (*local)(&argument, rqstp);
  if (result != NULL && !svc_sendreply(transp, xdr_result, result))
  {
    svcerr_systemerr(transp);
  }
  if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument))
  {
    syslog(LOG_ERR, "unable to free arguments");
  }
}