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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* This is a proxy daemon for the real Java slpd. This deamon starts
* at boot time, and listens for any incoming SLP messages only on
* loopback -- this way, only local processes can start the real
* daemon. When a message comes in, the proxy daemon dups the message
* fds onto fds 0, 1, and 2, and execs the real Java slpd. The purpose
* of this approach is for performance: boot time performance is
* not degraded by cranking off the (huge) JVM, and systems take
* the JVM resource hit only if they actually use SLP.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <errno.h>
#include <sys/byteorder.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <unistd.h>
#include <slp.h>
#include <fcntl.h>
#include <stdlib.h>
#include <syslog.h>
/* This is an index which points into the args array at the conf file arg */
#define CONF_INDEX 6
/* Location of the Java Virtual Machine */
#define JAVA_VM "/usr/java/jre/bin/java"
static char *slpd_args[] = {
JAVA_VM,
"-Xmx128m",
"-classpath",
"/usr/share/lib/slp/slpd.jar",
"com.sun.slp.slpd",
"-f",
"/etc/inet/slp.conf",
0
};
/*
* These are global so they can be easily accessed from a signal
* handler for cleanup.
*/
static void
run_slpd(void)
{
closelog();
if (execv(*slpd_args, slpd_args) == -1) {
openlog("slpd", LOG_PID, LOG_DAEMON);
syslog(LOG_ERR, "execv failed: %s", strerror(errno));
closelog();
}
}
/*
* If an alternate config file was specified with -f, make sure slpd
* uses that config file. Also, force libslp.so to use that new config
* file when checking to see if slpd is a DA. If any other arguments
* are given, they are ignored.
*/
static void
do_args(int argc, char *const *argv)
{
int c;
char *conf = NULL;
while ((c = getopt(argc, argv, "f:")) != EOF)
switch (c) {
case 'f':
conf = optarg;
break;
default:
break;
}
if (conf != NULL) {
char *prefix = "SLP_CONF_FILE=";
int env_size;
char *conf_env;
env_size = strlen(prefix) + strlen(conf) + 1;
if ((conf_env = malloc(env_size)) == NULL) {
syslog(LOG_ERR, "no memory");
exit(1);
}
(void) strlcpy(conf_env, prefix, env_size);
(void) strlcat(conf_env, conf, env_size);
(void) putenv(conf_env);
slpd_args[CONF_INDEX] = conf;
}
}
static void
detachfromtty(void) {
switch (fork()) {
case -1:
perror("slpd: can not fork");
exit(1);
/*NOTREACHED*/
case 0:
break;
default:
exit(0);
}
/*
* Close existing file descriptors, open "/dev/null" as
* standard input, output, and error, and detach from
* controlling terminal.
*/
closefrom(0);
(void) open("/dev/null", O_RDONLY);
(void) open("/dev/null", O_WRONLY);
(void) dup(1);
(void) setsid();
}
static void
cleanup_and_exit(int retval)
{
closelog();
exit(retval);
}
int
main(int argc, char *const *argv)
{
struct sockaddr_in bindaddr;
socklen_t addrlen;
const char *isDA;
const char *proxyReg;
int connfd;
int lfd;
const int on = 1;
detachfromtty();
openlog("slpd", LOG_PID, LOG_DAEMON);
do_args(argc, argv);
/* If slpd has been configured to run as a DA, start it and exit */
isDA = SLPGetProperty("net.slp.isDA");
proxyReg = SLPGetProperty("net.slp.serializedRegURL");
if ((isDA && (strcasecmp(isDA, "true") == 0)) || proxyReg) {
run_slpd();
return (1);
}
if ((lfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
syslog(LOG_ERR, "socket failed: %s", strerror(errno));
cleanup_and_exit(1);
}
(void) setsockopt(lfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof (on));
(void) memset((void *)&bindaddr, 0, sizeof (bindaddr));
bindaddr.sin_family = AF_INET;
bindaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
bindaddr.sin_port = htons(427);
if (bind(lfd, (const struct sockaddr *)&bindaddr, sizeof (bindaddr))
< 0) {
syslog(LOG_ERR, "bind failed: %s", strerror(errno));
cleanup_and_exit(1);
}
if (listen(lfd, 1) < 0) {
syslog(LOG_ERR, "listen failed: %s", strerror(errno));
cleanup_and_exit(1);
}
addrlen = sizeof (bindaddr);
if ((connfd = accept(lfd, (struct sockaddr *)&bindaddr, &addrlen))
< 0) {
syslog(LOG_ERR, "accept failed: %s", strerror(errno));
cleanup_and_exit(1);
}
(void) close(lfd);
(void) dup2(connfd, 0);
(void) close(connfd);
(void) dup2(0, 1);
(void) dup2(0, 2);
run_slpd();
return (1);
}
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