243 lines
7.2 KiB
C
243 lines
7.2 KiB
C
/*
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* Copyright (c) 1995
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* A.R. Gordon (andrew.gordon@net-tel.co.uk). All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the FreeBSD project
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/* main() function for status monitor daemon. Some of the code in this */
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/* file was generated by running rpcgen /usr/include/rpcsvc/sm_inter.x */
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/* The actual program logic is in the file procs.c */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <rpc/rpc.h>
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#include <rpc/rpc_com.h>
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#include <string.h>
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#include <syslog.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <unistd.h>
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#include "statd.h"
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int debug = 0; /* Controls syslog() calls for debug messages */
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static void handle_sigchld(int sig);
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static void usage(void);
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const char *transports[] = { "udp", "tcp", "udp6", "tcp6" };
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int
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main(int argc, char **argv)
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{
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SVCXPRT *transp;
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struct sigaction sa;
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struct netconfig *nconf;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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int ch, i, maxindex, r, s, sock;
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char *endptr;
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int maxrec = RPC_MAXDATASIZE;
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in_port_t svcport = 0;
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while ((ch = getopt(argc, argv, "dp:")) != -1)
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switch (ch) {
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case 'd':
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debug = 1;
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break;
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case 'p':
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endptr = NULL;
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svcport = (in_port_t)strtoul(optarg, &endptr, 10);
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if (endptr == NULL || *endptr != '\0' || svcport == 0 ||
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svcport >= IPPORT_MAX)
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usage();
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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(void)rpcb_unset(SM_PROG, SM_VERS, NULL);
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/*
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* Check if IPv6 support is present.
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*/
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s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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if (s < 0)
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maxindex = 2;
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else {
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close(s);
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maxindex = 4;
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}
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if (svcport != 0) {
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bzero(&sin, sizeof(struct sockaddr_in));
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sin.sin_len = sizeof(struct sockaddr_in);
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sin.sin_family = AF_INET;
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sin.sin_port = htons(svcport);
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bzero(&sin6, sizeof(struct sockaddr_in6));
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sin6.sin6_len = sizeof(struct sockaddr_in6);
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sin6.sin6_family = AF_INET6;
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sin6.sin6_port = htons(svcport);
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}
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rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
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for (i = 0; i < maxindex; i++) {
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nconf = getnetconfigent(transports[i]);
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if (nconf == NULL)
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errx(1, "cannot get %s netconf: %s.", transports[i],
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nc_sperror());
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if (svcport != 0) {
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if (strcmp(nconf->nc_netid, "udp6") == 0) {
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sock = socket(AF_INET6, SOCK_DGRAM,
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IPPROTO_UDP);
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if (sock != -1) {
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r = bindresvport_sa(sock,
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(struct sockaddr *)&sin6);
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if (r != 0) {
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syslog(LOG_ERR, "bindresvport: %m");
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exit(1);
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}
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}
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} else if (strcmp(nconf->nc_netid, "udp") == 0) {
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sock = socket(AF_INET, SOCK_DGRAM,
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IPPROTO_UDP);
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if (sock != -1) {
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r = bindresvport(sock, &sin);
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if (r != 0) {
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syslog(LOG_ERR, "bindresvport: %m");
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exit(1);
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}
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}
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} else if (strcmp(nconf->nc_netid, "tcp6") == 0) {
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sock = socket(AF_INET6, SOCK_STREAM,
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IPPROTO_TCP);
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if (sock != -1) {
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r = bindresvport_sa(sock,
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(struct sockaddr *)&sin6);
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if (r != 0) {
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syslog(LOG_ERR, "bindresvport: %m");
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exit(1);
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}
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}
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} else if (strcmp(nconf->nc_netid, "tcp") == 0) {
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sock = socket(AF_INET, SOCK_STREAM,
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IPPROTO_TCP);
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if (sock != -1) {
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r = bindresvport(sock, &sin);
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if (r != 0) {
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syslog(LOG_ERR, "bindresvport: %m");
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exit(1);
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}
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}
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}
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transp = svc_tli_create(sock, nconf, NULL,
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RPC_MAXDATASIZE, RPC_MAXDATASIZE);
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} else {
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transp = svc_tli_create(RPC_ANYFD, nconf, NULL,
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RPC_MAXDATASIZE, RPC_MAXDATASIZE);
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}
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if (transp == NULL) {
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errx(1, "cannot create %s service.", transports[i]);
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/* NOTREACHED */
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}
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if (!svc_reg(transp, SM_PROG, SM_VERS, sm_prog_1, nconf)) {
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errx(1, "unable to register (SM_PROG, NLM_SM, %s)",
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transports[i]);
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/* NOTREACHED */
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}
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init_file("/var/db/statd.status");
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freenetconfigent(nconf);
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}
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/* Note that it is NOT sensible to run this program from inetd - the */
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/* protocol assumes that it will run immediately at boot time. */
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daemon(0, 0);
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openlog("rpc.statd", 0, LOG_DAEMON);
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if (debug) syslog(LOG_INFO, "Starting - debug enabled");
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else syslog(LOG_INFO, "Starting");
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/* Install signal handler to collect exit status of child processes */
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sa.sa_handler = handle_sigchld;
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sigemptyset(&sa.sa_mask);
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sigaddset(&sa.sa_mask, SIGCHLD);
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sa.sa_flags = SA_RESTART;
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sigaction(SIGCHLD, &sa, NULL);
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/* Initialisation now complete - start operating */
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notify_hosts(); /* Forks a process (if necessary) to do the */
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/* SM_NOTIFY calls, which may be slow. */
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svc_run(); /* Should never return */
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exit(1);
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}
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static void
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usage()
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{
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fprintf(stderr, "usage: rpc.statd [-d] [-p <port>]\n");
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exit(1);
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}
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/* handle_sigchld ---------------------------------------------------------- */
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/*
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Purpose: Catch SIGCHLD and collect process status
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Retruns: Nothing.
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Notes: No special action required, other than to collect the
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process status and hence allow the child to die:
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we only use child processes for asynchronous transmission
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of SM_NOTIFY to other systems, so it is normal for the
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children to exit when they have done their work.
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*/
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static void handle_sigchld(int sig __unused)
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{
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int pid, status;
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pid = wait4(-1, &status, WNOHANG, (struct rusage*)0);
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if (!pid) syslog(LOG_ERR, "Phantom SIGCHLD??");
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else if (status == 0)
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{
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if (debug) syslog(LOG_DEBUG, "Child %d exited OK", pid);
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}
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else syslog(LOG_ERR, "Child %d failed with status %d", pid,
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WEXITSTATUS(status));
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}
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