slinux.c revision 22514 
1220231Snp/*
2220231Snp * (C)opyright October 1992 Darren Reed. (from tcplog)
3220231Snp *
4220231Snp *   This software may be freely distributed as long as it is not altered
5220231Snp * in any way and that this messagge always accompanies it.
6228561Snp *
7237263Snp *   The author of this software makes no garuntee about the
8220231Snp * performance of this package or its suitability to fulfill any purpose.
9237263Snp *
10237263Snp */
11237263Snp
12237263Snp#include <stdio.h>
13220231Snp#include <string.h>
14#include <netdb.h>
15#include <ctype.h>
16#include <signal.h>
17#include <errno.h>
18#include <sys/types.h>
19#include <sys/time.h>
20#include <sys/timeb.h>
21#include <sys/socket.h>
22#include <sys/file.h>
23#include <sys/ioctl.h>
24#include <sys/dir.h>
25#include <linux/netdevice.h>
26#include <net/if.h>
27#include <netinet/in.h>
28#include <netinet/in_systm.h>
29#include <netinet/ip.h>
30#include <netinet/tcp.h>
31#include "ip_compat.h"
32#include "tcpip.h"
33
34#if !defined(lint) && defined(LIBC_SCCS)
35static	char	sccsid[] = "@(#)slinux.c	1.2 8/25/95";
36#endif
37
38#define	CHUNKSIZE	8192
39#define BUFSPACE	(4*CHUNKSIZE)
40
41/*
42 * Be careful to only include those defined in the flags option for the
43 * interface are included in the header size.
44 */
45
46static	int	timeout;
47static	char	*eth_dev = NULL;
48
49
50int	initdevice(dev, sport, tout)
51char	*dev;
52int	sport, tout;
53{
54	int fd;
55
56	eth_dev = strdup(dev);
57	if ((fd = socket(AF_INET, SOCK_PACKET, htons(ETHERTYPE_IP))) == -1)
58	    {
59		perror("socket(SOCK_PACKET)");
60		exit(-1);
61	    }
62
63	return fd;
64}
65
66
67/*
68 * output an IP packet onto a fd opened for /dev/nit
69 */
70int	sendip(fd, pkt, len)
71int	fd, len;
72char	*pkt;
73{
74	struct	sockaddr	s;
75	struct	ifreq	ifr;
76
77	strncpy(ifr.ifr_name, eth_dev, sizeof(ifr.ifr_name));
78	if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1)
79	    {
80		perror("SIOCGIFHWADDR");
81		return -1;
82	    }
83	bcopy(ifr.ifr_hwaddr.sa_data, pkt + 6, 6);
84	s.sa_family = ETHERTYPE_IP;
85	strncpy(s.sa_data, eth_dev, sizeof(s.sa_data));
86
87	if (sendto(fd, pkt, len, 0, &s, sizeof(s)) == -1)
88	    {
89		perror("send");
90		return -1;
91	    }
92
93	return len;
94}
95