/* $NetBSD: lockd.c,v 1.13 2019/08/15 08:34:19 kamil Exp $ */
/*
* Copyright (c) 1995
* A.R. Gordon (
[email protected]). 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/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: lockd.c,v 1.13 2019/08/15 08:34:19 kamil Exp $");
#endif
/*
* 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 lock_proc.c
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <errno.h>
#include <syslog.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <netconfig.h>
#include <rpc/rpc.h>
#include <rpcsvc/sm_inter.h>
#include "lockd.h"
#include <rpcsvc/nlm_prot.h>
int debug_level = 0; /* 0 = no debugging syslog() calls */
extern int _rpcsvcdirty;
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 usage(void) __dead;
static void sigalarm_handler(int);
static const char *transports[] = { "udp", "tcp", "udp6", "tcp6" };
int
main(int argc, char **argv)
{
SVCXPRT *transp;
int ch, i, minindex, maxindex, s;
bool use_ipv4, use_ipv6;
struct sigaction sigchild, sigalarm;
int grace_period = 30;
struct netconfig *nconf;
int maxrec = RPC_MAXDATASIZE;
(void)setprogname(*argv);
use_ipv4 = use_ipv6 = false;
while ((ch = getopt(argc, argv, "d:g:46")) != (-1)) {
switch (ch) {
case 'd':
debug_level = atoi(optarg);
if (!debug_level) {
usage();
/* NOTREACHED */
}
break;
case 'g':
grace_period = atoi(optarg);
if (!grace_period) {
usage();
/* NOTREACHED */
}
break;
case '4':
use_ipv4 = true;
break;
case '6':
use_ipv6 = true;
break;
default:
case '?':
usage();
/* NOTREACHED */
}
}
(void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
if (!use_ipv4 && !use_ipv6) {
s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (s < 0)
use_ipv4 = true;
else {
(void)close(s);
use_ipv4 = use_ipv6 = true;
}
}
if (use_ipv4)
minindex = 0;
else
minindex = 2;
if (use_ipv6)
maxindex = 4;
else
maxindex = 2;
(void)rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
for (i = minindex; i < maxindex; i++) {
nconf = getnetconfigent(transports[i]);
if (nconf == NULL)
errx(1, "cannot get %s netconf.", transports[i]);
transp = svc_tli_create(RPC_ANYFD, nconf, NULL, RPC_MAXDATASIZE,
RPC_MAXDATASIZE);
if (transp == NULL) {
errx(1, "cannot create %s service.", transports[i]);
/* NOTREACHED */
}
if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0, nconf)) {
errx(1, "unable to register (NLM_PROG, NLM_SM, %s)",
transports[i]);
/* NOTREACHED */
}
if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1, nconf)) {
errx(1, "unable to register (NLM_PROG, NLM_VERS, %s)",
transports[i]);
/* NOTREACHED */
}
if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3, nconf)) {
errx(1, "unable to register (NLM_PROG, NLM_VERSX, %s)",
transports[i]);
/* NOTREACHED */
}
if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4, nconf)) {
errx(1, "unable to register (NLM_PROG, NLM_VERS4, %s)",
transports[i]);
/* NOTREACHED */
}
freenetconfigent(nconf);
}
/*
* 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 */
}
(void)pidfile(NULL);
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;
(void)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;
(void)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(void)
{
(void)fprintf(stderr, "Usage: %s [-46] [-d debug_level] [-g grace_period]\n",
getprogname());
exit(1);
}
