sockraw.c revision 288683 
1/*	$FreeBSD: head/contrib/ipfilter/ipsend/sockraw.c 145519 2005-04-25 18:20:15Z darrenr $	*/
2
3/*
4 * (C)opyright 2000 Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * WARNING: Attempting to use this .c file on HP-UX 11.00 will cause the
9 *          system to crash.
10 */
11#include <sys/param.h>
12#include <sys/types.h>
13#include <sys/socket.h>
14#include <sys/ioctl.h>
15
16#include <net/if.h>
17#include <netinet/in.h>
18#include <netinet/in_systm.h>
19#include <netinet/ip.h>
20#include <netinet/if_ether.h>
21#include <netinet/ip_var.h>
22#include <netinet/udp.h>
23#include <netinet/udp_var.h>
24#include <netinet/tcp.h>
25#include <stdio.h>
26#include <string.h>
27#include <unistd.h>
28#include <stdlib.h>
29#include <errno.h>
30#include "ipsend.h"
31
32#if !defined(lint) && defined(LIBC_SCCS)
33static	char	sirix[] = "@(#)sirix.c	1.0 10/9/97 (C)1997 Marc Boucher";
34#endif
35
36
37int	initdevice(char *device, int tout)
38{
39	struct sockaddr s;
40	struct ifreq ifr;
41	int fd;
42
43	memset(&ifr, 0, sizeof(ifr));
44	strncpy(ifr.ifr_name, device, sizeof ifr.ifr_name);
45
46	if ((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
47	    {
48		perror("socket(AF_INET, SOCK_RAW, IPPROTO_RAW)");
49		return -1;
50	    }
51
52	if (ioctl(fd, SIOCGIFADDR, &ifr) == -1)
53	    {
54		perror("ioctl SIOCGIFADDR");
55		return -1;
56	    }
57
58	bzero((char *)&s, sizeof(s));
59	s.sa_family = AF_INET;
60	bcopy(&ifr.ifr_addr, s.sa_data, 4);
61	if (bind(fd, &s, sizeof(s)) == -1)
62		perror("bind");
63	return fd;
64}
65
66
67/*
68 * output an IP packet
69 */
70int	sendip(int fd, char *pkt, int len)
71{
72	struct ether_header *eh;
73	struct sockaddr_in sin;
74
75	eh = (struct ether_header *)pkt;
76	bzero((char *)&sin, sizeof(sin));
77	sin.sin_family = AF_INET;
78	pkt += 14;
79	len -= 14;
80	bcopy(pkt + 12, (char *)&sin.sin_addr, 4);
81
82	if (sendto(fd, pkt, len, 0, &sin, sizeof(sin)) == -1)
83	    {
84		perror("send");
85		return -1;
86	    }
87
88	return len;
89}
90