source: branches/stable/mindi-busybox/networking/udhcp/clientsocket.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 1.7 KB
Line 
1/*
2 * clientsocket.c -- DHCP client socket creation
3 *
4 * udhcp client
5 *
6 * Russ Dill <Russ.Dill@asu.edu> July 2001
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23#include <sys/types.h>
24#include <sys/socket.h>
25#include <unistd.h>
26#include <netinet/in.h>
27#include <features.h>
28#if (__GLIBC__ >= 2 && __GLIBC_MINOR >= 1) || defined _NEWLIB_VERSION
29#include <netpacket/packet.h>
30#include <net/ethernet.h>
31#else
32#include <asm/types.h>
33#include <linux/if_packet.h>
34#include <linux/if_ether.h>
35#endif
36
37#include "clientsocket.h"
38#include "common.h"
39
40
41int raw_socket(int ifindex)
42{
43    int fd;
44    struct sockaddr_ll sock;
45
46    DEBUG(LOG_INFO, "Opening raw socket on ifindex %d", ifindex);
47    if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
48        DEBUG(LOG_ERR, "socket call failed: %m");
49        return -1;
50    }
51
52    sock.sll_family = AF_PACKET;
53    sock.sll_protocol = htons(ETH_P_IP);
54    sock.sll_ifindex = ifindex;
55    if (bind(fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) {
56        DEBUG(LOG_ERR, "bind call failed: %m");
57        close(fd);
58        return -1;
59    }
60
61    return fd;
62}
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