mirror of
https://github.com/sheumann/hush.git
synced 2024-08-14 11:28:58 +00:00
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/*
|
|
* clientsocket.c -- DHCP client socket creation
|
|
*
|
|
* udhcp client
|
|
*
|
|
* Russ Dill <Russ.Dill@asu.edu> July 2001
|
|
*
|
|
* 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 <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <unistd.h>
|
|
#include <netinet/in.h>
|
|
#include <features.h>
|
|
#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
|
|
#include <netpacket/packet.h>
|
|
#include <net/ethernet.h>
|
|
#else
|
|
#include <asm/types.h>
|
|
#include <linux/if_packet.h>
|
|
#include <linux/if_ether.h>
|
|
#endif
|
|
|
|
#include "clientsocket.h"
|
|
#include "common.h"
|
|
|
|
|
|
int raw_socket(int ifindex)
|
|
{
|
|
int fd;
|
|
struct sockaddr_ll sock;
|
|
|
|
DEBUG(LOG_INFO, "Opening raw socket on ifindex %d", ifindex);
|
|
if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
|
|
DEBUG(LOG_ERR, "socket call failed: %m");
|
|
return -1;
|
|
}
|
|
|
|
sock.sll_family = AF_PACKET;
|
|
sock.sll_protocol = htons(ETH_P_IP);
|
|
sock.sll_ifindex = ifindex;
|
|
if (bind(fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) {
|
|
DEBUG(LOG_ERR, "bind call failed: %m");
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
return fd;
|
|
}
|