NetBSD/usr.sbin/dhcp/sysconfd/sysconfd.c

259 lines
6.1 KiB
C

/* main.c
System configuration status daemon...
!!!Boy, howdy, is this ever not guaranteed not to change!!! */
/*
* Copyright (c) 1997 The Internet Software Consortium.
* 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. Neither the name of The Internet Software Consortium nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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.
*
* This software has been written for the Internet Software Consortium
* by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
* Enterprises. To learn more about the Internet Software Consortium,
* see ``http://www.vix.com/isc''. To learn more about Vixie
* Enterprises, see ``http://www.vix.com''.
*/
#ifndef lint
static char copyright[] =
"$Id: sysconfd.c,v 1.1.1.1 1997/10/20 23:29:48 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n";
#endif /* not lint */
#include "dhcpd.h"
int sysconf_fd;
struct sysconf_client {
struct sysconf_client *next;
int fd;
} *clients;
static void new_connection PROTO ((struct protocol *));
static void client_input PROTO ((struct protocol *));
int log_priority;
int log_perror;
struct interface_info fallback_interface;
TIME cur_time;
u_int16_t local_port;
int main (argc, argv, envp)
int argc;
char **argv;
char **envp;
{
struct sockaddr_un name;
int sysconf_fd;
int pid;
#ifdef SYSLOG_4_2
openlog ("sysconfd", LOG_NDELAY);
log_priority = LOG_DAEMON;
#else
openlog ("sysconfd", LOG_NDELAY, LOG_DAEMON);
#endif
#if !(defined (DEBUG) || defined (SYSLOG_4_2) || defined (__CYGWIN32__))
setlogmask (LOG_UPTO (LOG_INFO));
#endif
/* Make a socket... */
sysconf_fd = socket (AF_UNIX, SOCK_STREAM, 0);
if (sysconf_fd < 0)
error ("unable to create sysconf socket: %m");
/* XXX for now... */
name.sun_family = PF_UNIX;
strcpy (name.sun_path, "/var/run/sysconf");
name.sun_len = ((sizeof name) - (sizeof name.sun_path) +
strlen (name.sun_path));
unlink (name.sun_path);
/* Bind to it... */
if (bind (sysconf_fd, (struct sockaddr *)&name, name.sun_len) < 0)
error ("can't bind to sysconf socket: %m");
/* Listen for connections... */
if (listen (sysconf_fd, 1) < 0)
error ("can't listen on sysconf socket: %m");
/* Stop logging to stderr... */
log_perror = 0;
/* Become a daemon... */
if ((pid = fork ()) < 0)
error ("Can't fork daemon: %m");
else if (pid)
exit (0);
/* Become session leader... */
(void)setsid ();
/* Set up a protocol structure for it... */
add_protocol ("listener", sysconf_fd, new_connection, 0);
/* Kernel status stuff goes here... */
/* Wait for something to happen... */
dispatch ();
exit (0);
}
void new_connection (proto)
struct protocol *proto;
{
struct sockaddr_un name;
int namelen;
struct sysconf_client *tmp;
int new_fd;
tmp = (struct sysconf_client *)malloc (sizeof *tmp);
if (tmp < 0)
error ("Can't find memory for new client!");
memset (tmp, 0, sizeof *tmp);
namelen = sizeof name;
new_fd = accept (proto -> fd, (struct sockaddr *)&name, &namelen);
if (new_fd < 0)
warn ("accept: %m");
tmp -> next = clients;
tmp -> fd = new_fd;
clients = tmp;
add_protocol ("aclient", new_fd, client_input, 0);
}
void client_input (proto)
struct protocol *proto;
{
struct sysconf_header hdr;
int status;
char *buf;
void (*handler) PROTO ((struct sysconf_header *, void *));
struct sysconf_client *client;
status = read (proto -> fd, &hdr, sizeof hdr);
if (status < 0) {
blow:
warn ("client_input: %m");
close (proto -> fd);
remove_protocol (proto);
return;
}
if (status < sizeof (hdr)) {
warn ("client_input: short message");
goto blow;
}
if (hdr.length) {
buf = malloc (hdr.length);
if (!buf) {
warn ("client_input: can't buffer payload");
goto blow;
}
status = read (proto -> fd, buf, hdr.length);
if (status < 0) {
warn ("client_input payload read: %m");
goto blow;
}
if (status != hdr.length) {
warn ("client_input payload: short read");
goto blow;
}
} else
buf = (char *)0;
for (client = clients; client; client = client -> next) {
if (client -> fd == proto -> fd)
continue;
status = write (client -> fd, &hdr, sizeof hdr);
if (status < 0) {
warn ("client_input: %m");
continue;
}
if (status < sizeof (hdr)) {
warn ("client_input: short write");
continue;
}
if (hdr.length) {
status = write (client -> fd, buf, hdr.length);
if (status < 0) {
warn ("client_input payload write: %m");
continue;
}
if (status != hdr.length) {
warn ("client_input payload: short write");
continue;
}
}
}
if (buf)
free (buf);
}
void cleanup ()
{
}
int commit_leases ()
{
return 0;
}
int write_lease (lease)
struct lease *lease;
{
return 0;
}
void db_startup ()
{
}
void bootp (packet)
struct packet *packet;
{
}
void dhcp (packet)
struct packet *packet;
{
}