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