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/*
* $Id: brctld.c,v 1.1.1.4 2003/10/14 08:09:37 sparq Exp $
*
* Copyright (C) 2000 Lennert Buytenhek
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <signal.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <asm/param.h>
#include "libbridge.h"
#include "brctl.h"
char *help_message =
"addbr\t\t\t\t\tadd bridge\n"
"addif\t\t\t<device>\tadd interface to bridge\n"
"bridge\t\t\t<bridge>\tselect bridge to work in\n"
"delbr\t\t\t\t\tdelete bridge\n"
"delif\t\t\t<device>\tdelete interface from bridge\n"
"setageing\t\t<time>\t\tset ageing time\n"
"setbridgeprio\t\t<prio>\t\tset bridge priority\n"
"setfd\t\t\t<time>\t\tset bridge forward delay\n"
"setgcint\t\t<time>\t\tset garbage collection interval\n"
"sethello\t\t<time>\t\tset hello time\n"
"setmaxage\t\t<time>\t\tset max message age\n"
"setpathcost\t\t<port> <cost>\tset path cost\n"
"setportprio\t\t<port> <prio>\tset port priority\n"
"show\t\t\t\t\tshow a list of bridges\n"
"showbr\t\t\t\t\tshow bridge info\n"
"showmacs\t\t\t\tshow a list of mac addrs\n"
"stp\t\t\t<state>\t\t{dis,en}able stp\n"
"quit\t\t\t\t\texit this session\n"
"\n";
void help()
{
fprintf(stderr, help_message);
}
struct bridge *br = NULL;
int forkaway()
{
int f;
f = fork();
if (f < 0) {
perror("fork");
exit(-1);
}
return f;
}
void runchild(int sock)
{
char hostname[128];
if (forkaway())
return;
/* Hack. */
close(0); dup(sock);
close(1); dup(sock);
close(2); dup(sock);
br_init();
gethostname(hostname, 128);
printf("\n\n\n\n");
printf("brctld\t\tCopyright (C) 2000 Lennert Buytenhek <buytenh@gnu.org>\n");
printf("======================================================================");
printf("\n\n\n\n");
while (1) {
char arg0[128];
char arg1[128];
char cmd[128];
struct command *cmdptr;
char line[1024];
int numcmd;
printf("<%s> ", hostname);
fflush(stdout);
line[1023] = 0;
fgets(line, 1023, stdin);
while (strlen(line) > 0 &&
(line[strlen(line)-1] == '\r' ||
line[strlen(line)-1] == '\n'))
line[strlen(line)-1] = 0;
numcmd = sscanf(line, "%s %s %s", cmd, arg0, arg1);
if (!strcmp(cmd, "help")) {
help();
continue;
} else if (!strcmp(cmd, "bridge")) {
if (numcmd != 2) {
fprintf(stderr, "invalid number of arguments\n");
continue;
}
br = br_find_bridge(arg0);
if (br != NULL)
printf("now using bridge %s\n\n", arg0);
else
printf("can't find bridge %s\n\n", arg0);
continue;
} else if (!strcmp(cmd, "quit")) {
break;
}
if ((cmdptr = br_command_lookup(cmd)) == NULL) {
printf("unknown command '%s'\n\n", line);
continue;
}
if (cmdptr->needs_bridge_argument && br == NULL) {
printf("this command needs a bridge\n\n");
continue;
}
br_refresh();
cmdptr->func(br, arg0, arg1);
printf("\n");
}
shutdown(sock, 2);
exit(0);
}
void sigchild(int sig)
{
int status;
wait3(&status, WNOHANG, NULL);
}
int main(int argc, char *argv[])
{
struct sockaddr_in addr;
int sock;
int x;
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
return 1;
}
x = 1;
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x)) < 0) {
perror("setsockopt");
return 1;
}
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(31338);
if (bind(sock, &addr, sizeof(addr)) < 0) {
perror("bind");
return 1;
}
if (listen(sock, 1) < 0) {
perror("listen");
return 1;
}
if (forkaway())
return 0;
setsid();
signal(SIGCHLD, sigchild);
while (1) {
int len;
int newsock;
len = sizeof(addr);
if ((newsock = accept(sock, &addr, &len)) < 0) {
perror("accept");
return 1;
}
runchild(newsock);
}
return 0;
}
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