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/* $OpenBSD: lockd.c,v 1.14 2015/04/18 18:28:38 deraadt Exp $ */
/*
* 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.
*
*/
#include <sys/socket.h>
#include <netinet/in.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpcsvc/sm_inter.h>
#include "nlm_prot.h"
#include <arpa/inet.h>
#include <stdio.h>
#include <syslog.h>
#include <stdlib.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <limits.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include "lockd.h"
int debug_level = 0; /* 0 = no debugging syslog() calls */
int _rpcsvcdirty = 0;
int grace_expired;
void nlm_prog_0(struct svc_req *, SVCXPRT *);
void nlm_prog_1(struct svc_req *, SVCXPRT *);
void nlm_prog_3(struct svc_req *, SVCXPRT *);
void nlm_prog_4(struct svc_req *, SVCXPRT *);
static void sigalarm_handler(int);
static void usage(void);
int
main(int argc, char *argv[])
{
SVCXPRT *transp;
const char *errstr;
int ch;
struct sigaction sigchild, sigalarm;
int grace_period = 30;
while ((ch = getopt(argc, argv, "d:g:")) != (-1)) {
switch (ch) {
case 'd':
debug_level = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr) {
usage();
/* NOTREACHED */
}
break;
case 'g':
grace_period = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr) {
usage();
/* NOTREACHED */
}
break;
default:
case '?':
usage();
/* NOTREACHED */
}
}
(void) pmap_unset(NLM_PROG, NLM_SM);
(void) pmap_unset(NLM_PROG, NLM_VERS);
(void) pmap_unset(NLM_PROG, NLM_VERSX);
(void) pmap_unset(NLM_PROG, NLM_VERS4);
transp = svcudp_create(RPC_ANYSOCK);
if (transp == NULL) {
fprintf(stderr, "cannot create udp service.\n");
exit(1);
}
if (!svc_register(transp, NLM_PROG, NLM_SM,
(void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_0, IPPROTO_UDP)) {
fprintf(stderr, "unable to register (NLM_PROG, NLM_SM, udp).\n");
exit(1);
}
if (!svc_register(transp, NLM_PROG, NLM_VERS,
(void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_1, IPPROTO_UDP)) {
fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS, udp).\n");
exit(1);
}
if (!svc_register(transp, NLM_PROG, NLM_VERSX,
(void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_3, IPPROTO_UDP)) {
fprintf(stderr, "unable to register (NLM_PROG, NLM_VERSX, udp).\n");
exit(1);
}
if (!svc_register(transp, NLM_PROG, NLM_VERS4,
(void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_4, IPPROTO_UDP)) {
fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS4, udp).\n");
exit(1);
}
transp = svctcp_create(RPC_ANYSOCK, 0, 0);
if (transp == NULL) {
fprintf(stderr, "cannot create tcp service.\n");
exit(1);
}
if (!svc_register(transp, NLM_PROG, NLM_VERS,
(void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_1, IPPROTO_TCP)) {
fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS, tcp).\n");
exit(1);
}
if (!svc_register(transp, NLM_PROG, NLM_VERSX,
(void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_3, IPPROTO_TCP)) {
fprintf(stderr, "unable to register (NLM_PROG, NLM_VERSX, tcp).\n");
exit(1);
}
if (!svc_register(transp, NLM_PROG, NLM_VERS4,
(void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_4, IPPROTO_TCP)) {
fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS4, 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.
*/
if (daemon(0, 0) == -1) {
err(1, "cannot fork");
/* NOTREACHED */
}
openlog("rpc.lockd", 0, LOG_DAEMON);
if (debug_level)
syslog(LOG_INFO, "Starting, debug level %d", debug_level);
else
syslog(LOG_INFO, "Starting");
sigchild.sa_handler = sigchild_handler;
sigemptyset(&sigchild.sa_mask);
sigchild.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sigchild, NULL) != 0) {
syslog(LOG_WARNING, "sigaction(SIGCHLD) failed (%m)");
exit(1);
}
sigalarm.sa_handler = sigalarm_handler;
sigemptyset(&sigalarm.sa_mask);
sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
sigalarm.sa_flags |= SA_RESTART;
if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
syslog(LOG_WARNING, "sigaction(SIGALRM) failed (%m)");
exit(1);
}
grace_expired = 0;
if (alarm(10) == (unsigned int)-1) {
syslog(LOG_WARNING, "alarm failed (%m)");
exit(1);
}
svc_run(); /* Should never return */
return 1;
}
static void
/*ARGSUSED*/
sigalarm_handler(int s)
{
grace_expired = 1;
}
static void
usage()
{
errx(1, "usage: rpc.lockd [-d [debug_level]] [-g grace_period]");
}
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