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