1 /* vi: set sw=4 ts=4: */
3 * clientsocket.c -- DHCP client socket creation
7 * Russ Dill <Russ.Dill@asu.edu> July 2001
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <sys/types.h>
25 #include <sys/socket.h>
27 #include <netinet/in.h>
29 #if (__GLIBC__ >= 2 && __GLIBC_MINOR >= 1) || defined _NEWLIB_VERSION
30 #include <netpacket/packet.h>
31 #include <net/ethernet.h>
33 #include <asm/types.h>
34 #include <linux/if_packet.h>
35 #include <linux/if_ether.h>
38 #include "clientsocket.h"
42 int raw_socket(int ifindex)
45 struct sockaddr_ll sock;
47 DEBUG("Opening raw socket on ifindex %d", ifindex);
48 if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
49 bb_perror_msg("socket");
53 sock.sll_family = AF_PACKET;
54 sock.sll_protocol = htons(ETH_P_IP);
55 sock.sll_ifindex = ifindex;
56 if (bind(fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) {
57 bb_perror_msg("bind:");