256 lines
6.1 KiB
C
256 lines
6.1 KiB
C
/* main.c
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System configuration status daemon...
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!!!Boy, howdy, is this ever not guaranteed not to change!!! */
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/*
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* Copyright (c) 1997 The Internet Software Consortium.
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* 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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*
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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. Neither the name of The Internet Software Consortium nor the names
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* of its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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* This software has been written for the Internet Software Consortium
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* by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
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* Enterprises. To learn more about the Internet Software Consortium,
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* see ``http://www.vix.com/isc''. To learn more about Vixie
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* Enterprises, see ``http://www.vix.com''.
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*/
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#ifndef lint
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static char copyright[] =
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"$Id: sysconfd.c,v 1.3 1999/08/24 03:25:33 enami Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n";
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#endif /* not lint */
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#include "dhcpd.h"
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int sysconf_fd;
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struct sysconf_client {
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struct sysconf_client *next;
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int fd;
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} *clients;
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static void new_connection PROTO ((struct protocol *));
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static void client_input PROTO ((struct protocol *));
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int log_priority;
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int log_perror;
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TIME cur_time;
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u_int16_t local_port;
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int main (argc, argv, envp)
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int argc;
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char **argv;
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char **envp;
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{
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struct sockaddr_un name;
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int sysconf_fd;
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int pid;
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#ifdef SYSLOG_4_2
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openlog ("sysconfd", LOG_NDELAY);
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log_priority = LOG_DAEMON;
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#else
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openlog ("sysconfd", LOG_NDELAY, LOG_DAEMON);
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#endif
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#if !(defined (DEBUG) || defined (SYSLOG_4_2) || defined (__CYGWIN32__))
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setlogmask (LOG_UPTO (LOG_INFO));
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#endif
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/* Make a socket... */
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sysconf_fd = socket (AF_UNIX, SOCK_STREAM, 0);
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if (sysconf_fd < 0)
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error ("unable to create sysconf socket: %m");
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/* XXX for now... */
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name.sun_family = PF_UNIX;
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strcpy (name.sun_path, "/var/run/sysconf");
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name.sun_len = ((sizeof name) - (sizeof name.sun_path) +
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strlen (name.sun_path));
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unlink (name.sun_path);
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/* Bind to it... */
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if (bind (sysconf_fd, (struct sockaddr *)&name, name.sun_len) < 0)
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error ("can't bind to sysconf socket: %m");
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/* Listen for connections... */
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if (listen (sysconf_fd, 1) < 0)
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error ("can't listen on sysconf socket: %m");
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/* Stop logging to stderr... */
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log_perror = 0;
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/* Become a daemon... */
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if ((pid = fork ()) < 0)
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error ("Can't fork daemon: %m");
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else if (pid)
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exit (0);
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/* Become session leader... */
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(void)setsid ();
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/* Set up a protocol structure for it... */
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add_protocol ("listener", sysconf_fd, new_connection, 0);
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/* Kernel status stuff goes here... */
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/* Wait for something to happen... */
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dispatch (NULL);
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exit (0);
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}
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void new_connection (proto)
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struct protocol *proto;
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{
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struct sockaddr_un name;
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int namelen;
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struct sysconf_client *tmp;
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int new_fd;
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tmp = (struct sysconf_client *)malloc (sizeof *tmp);
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if (tmp < 0)
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error ("Can't find memory for new client!");
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memset (tmp, 0, sizeof *tmp);
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namelen = sizeof name;
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new_fd = accept (proto -> fd, (struct sockaddr *)&name, &namelen);
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if (new_fd < 0)
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warn ("accept: %m");
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tmp -> next = clients;
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tmp -> fd = new_fd;
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clients = tmp;
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add_protocol ("aclient", new_fd, client_input, 0);
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}
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void client_input (proto)
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struct protocol *proto;
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{
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struct sysconf_header hdr;
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int status;
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char *buf;
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void (*handler) PROTO ((struct sysconf_header *, void *));
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struct sysconf_client *client;
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status = read (proto -> fd, &hdr, sizeof hdr);
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if (status < 0) {
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blow:
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warn ("client_input: %m");
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close (proto -> fd);
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remove_protocol (proto);
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return;
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}
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if (status < sizeof (hdr)) {
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warn ("client_input: short message");
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goto blow;
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}
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if (hdr.length) {
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buf = malloc (hdr.length);
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if (!buf) {
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warn ("client_input: can't buffer payload");
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goto blow;
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}
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status = read (proto -> fd, buf, hdr.length);
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if (status < 0) {
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warn ("client_input payload read: %m");
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goto blow;
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}
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if (status != hdr.length) {
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warn ("client_input payload: short read");
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goto blow;
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}
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} else
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buf = (char *)0;
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for (client = clients; client; client = client -> next) {
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if (client -> fd == proto -> fd)
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continue;
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status = write (client -> fd, &hdr, sizeof hdr);
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if (status < 0) {
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warn ("client_input: %m");
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continue;
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}
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if (status < sizeof (hdr)) {
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warn ("client_input: short write");
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continue;
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}
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if (hdr.length) {
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status = write (client -> fd, buf, hdr.length);
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if (status < 0) {
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warn ("client_input payload write: %m");
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continue;
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}
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if (status != hdr.length) {
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warn ("client_input payload: short write");
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continue;
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}
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}
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}
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if (buf)
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free (buf);
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}
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void cleanup ()
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{
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}
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int commit_leases ()
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{
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return 0;
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}
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int write_lease (lease)
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struct lease *lease;
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{
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return 0;
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}
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void db_startup ()
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{
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}
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void bootp (packet)
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struct packet *packet;
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{
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}
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void dhcp (packet)
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struct packet *packet;
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{
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}
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