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/*
* Copyright (C) 2006 BATMAN contributors:
* Thomas Lopatic
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*
*/
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include "../os.h"
#include "../batman.h"
#define IOCGETNWDEV 1
void set_rp_filter(int32_t state, char* dev)
{
FILE *f;
char filename[100], *colon_ptr;
/* if given interface is an alias use parent interface */
if ( ( colon_ptr = strchr( dev, ':' ) ) != NULL )
*colon_ptr = '\0';
sprintf( filename, "/proc/sys/net/ipv4/conf/%s/rp_filter", dev);
if((f = fopen(filename, "w")) == NULL)
return;
fprintf(f, "%d", state);
fclose(f);
if ( colon_ptr != NULL )
*colon_ptr = ':';
}
int32_t get_rp_filter(char *dev)
{
FILE *f;
int32_t state = 0;
char filename[100], *colon_ptr;
/* if given interface is an alias use parent interface */
if ( ( colon_ptr = strchr( dev, ':' ) ) != NULL )
*colon_ptr = '\0';
sprintf( filename, "/proc/sys/net/ipv4/conf/%s/rp_filter", dev);
if((f = fopen(filename, "r")) == NULL)
return 0;
fscanf(f, "%d", &state);
fclose(f);
if ( colon_ptr != NULL )
*colon_ptr = ':';
return state;
}
void set_send_redirects( int32_t state, char* dev ) {
FILE *f;
char filename[100], *colon_ptr;
/* if given interface is an alias use parent interface */
if ( ( colon_ptr = strchr( dev, ':' ) ) != NULL )
*colon_ptr = '\0';
sprintf( filename, "/proc/sys/net/ipv4/conf/%s/send_redirects", dev);
if((f = fopen(filename, "w")) == NULL)
return;
fprintf(f, "%d", state);
fclose(f);
if ( colon_ptr != NULL )
*colon_ptr = ':';
}
int32_t get_send_redirects( char *dev ) {
FILE *f;
int32_t state = 0;
char filename[100], *colon_ptr;
/* if given interface is an alias use parent interface */
if ( ( colon_ptr = strchr( dev, ':' ) ) != NULL )
*colon_ptr = '\0';
sprintf( filename, "/proc/sys/net/ipv4/conf/%s/send_redirects", dev);
if((f = fopen(filename, "r")) == NULL)
return 0;
fscanf(f, "%d", &state);
fclose(f);
if ( colon_ptr != NULL )
*colon_ptr = ':';
return state;
}
void set_forwarding(int32_t state)
{
FILE *f;
if((f = fopen("/proc/sys/net/ipv4/ip_forward", "w")) == NULL)
return;
fprintf(f, "%d", state);
fclose(f);
}
int32_t get_forwarding(void)
{
FILE *f;
int32_t state = 0;
if((f = fopen("/proc/sys/net/ipv4/ip_forward", "r")) == NULL)
return 0;
fscanf(f, "%d", &state);
fclose(f);
return state;
}
int8_t bind_to_iface( int32_t sock, char *dev ) {
char *colon_ptr;
/* if given interface is an alias bind to parent interface */
if ( ( colon_ptr = strchr( dev, ':' ) ) != NULL )
*colon_ptr = '\0';
if ( setsockopt( sock, SOL_SOCKET, SO_BINDTODEVICE, dev, strlen( dev ) + 1 ) < 0 ) {
if ( colon_ptr != NULL )
*colon_ptr = ':';
return -1;
}
if ( colon_ptr != NULL )
*colon_ptr = ':';
return 1;
}
int8_t use_gateway_module() {
int32_t fd;
if ( ( fd = open( "/dev/batgat", O_WRONLY ) ) < 0 ) {
debug_output( 0, "Warning - batgat kernel modul interface (/dev/batgat) not usable: %s\nThis may decrease the performance of batman!\n", strerror(errno) );
return -1;
}
return fd;
}
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