slinux.c revision 80486 
1/*
2 * (C)opyright 1992-1998 Darren Reed. (from tcplog)
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 */
6
7#include <stdio.h>
8#include <string.h>
9#include <netdb.h>
10#include <ctype.h>
11#include <signal.h>
12#include <errno.h>
13#include <sys/types.h>
14#include <sys/time.h>
15#include <sys/timeb.h>
16#include <sys/socket.h>
17#include <sys/file.h>
18#include <sys/ioctl.h>
19#include <sys/dir.h>
20#include <linux/netdevice.h>
21#include <net/if.h>
22#include <netinet/in.h>
23#include <netinet/in_systm.h>
24#include <netinet/ip.h>
25#include <netinet/tcp.h>
26#include "ipsend.h"
27
28#if !defined(lint)
29static const char sccsid[] = "@(#)slinux.c	1.2 8/25/95";
30static const char rcsid[] = "@(#)$Id: slinux.c,v 2.1.4.1 2001/06/26 10:43:22 darrenr Exp $";
31#endif
32
33#define	CHUNKSIZE	8192
34#define BUFSPACE	(4*CHUNKSIZE)
35
36/*
37 * Be careful to only include those defined in the flags option for the
38 * interface are included in the header size.
39 */
40
41static	int	timeout;
42static	char	*eth_dev = NULL;
43
44
45int	initdevice(dev, sport, spare)
46char	*dev;
47int	sport, spare;
48{
49	int fd;
50
51	eth_dev = strdup(dev);
52	if ((fd = socket(AF_INET, SOCK_PACKET, htons(ETHERTYPE_IP))) == -1)
53	    {
54		perror("socket(SOCK_PACKET)");
55		exit(-1);
56	    }
57
58	return fd;
59}
60
61
62/*
63 * output an IP packet onto a fd opened for /dev/nit
64 */
65int	sendip(fd, pkt, len)
66int	fd, len;
67char	*pkt;
68{
69	struct	sockaddr	s;
70	struct	ifreq	ifr;
71
72	strncpy(ifr.ifr_name, eth_dev, sizeof(ifr.ifr_name));
73	if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1)
74	    {
75		perror("SIOCGIFHWADDR");
76		return -1;
77	    }
78	bcopy(ifr.ifr_hwaddr.sa_data, pkt + 6, 6);
79	s.sa_family = ETHERTYPE_IP;
80	strncpy(s.sa_data, eth_dev, sizeof(s.sa_data));
81
82	if (sendto(fd, pkt, len, 0, &s, sizeof(s)) == -1)
83	    {
84		perror("send");
85		return -1;
86	    }
87
88	return len;
89}
90