1/*	$FreeBSD: releng/10.3/contrib/ipfilter/ipsend/sirix.c 255332 2013-09-06 23:11:19Z cy $	*/
2
3/*
4 * (C)opyright 1992-1998 Darren Reed.
5 * (C)opyright 1997 Marc Boucher.
6 *
7 * See the IPFILTER.LICENCE file for details on licencing.
8 *
9 */
10#include <stdio.h>
11#include <sys/types.h>
12#include <string.h>
13#include <unistd.h>
14#include <stdlib.h>
15#include <errno.h>
16#include <sys/socket.h>
17#include <sys/ioctl.h>
18
19#include <net/if.h>
20#include <net/raw.h>
21#include <netinet/in.h>
22#include <netinet/in_systm.h>
23#include <netinet/ip.h>
24#include <netinet/if_ether.h>
25#include <netinet/ip_var.h>
26#include "ipsend.h"
27#include <netinet/udp_var.h>
28
29#if !defined(lint) && defined(LIBC_SCCS)
30static	char	sirix[] = "@(#)sirix.c	1.0 10/9/97 (C)1997 Marc Boucher";
31#endif
32
33
34int	initdevice(char *device, int tout)
35{
36	int fd;
37	struct sockaddr_raw sr;
38
39	if ((fd = socket(PF_RAW, SOCK_RAW, RAWPROTO_DRAIN)) < 0)
40	    {
41		perror("socket(PF_RAW, SOCK_RAW, RAWPROTO_DRAIN)");
42		return -1;
43	    }
44
45	memset(&sr, 0, sizeof(sr));
46	sr.sr_family = AF_RAW;
47	sr.sr_port = ETHERTYPE_IP;
48	strncpy(sr.sr_ifname, device, sizeof(sr.sr_ifname));
49	if (bind(fd, &sr, sizeof(sr)) < 0)
50	    {
51		perror("bind AF_RAW");
52		close(fd);
53		return -1;
54	    }
55	return fd;
56}
57
58
59/*
60 * output an IP packet
61 */
62int	sendip(int fd, char *pkt, int len)
63{
64	struct sockaddr_raw sr;
65	int srlen = sizeof(sr);
66	struct ifreq ifr;
67	struct ether_header *eh = (struct ether_header *)pkt;
68
69	if (getsockname(fd, &sr, &srlen) == -1)
70	    {
71		perror("getsockname");
72		return -1;
73	    }
74
75	memset(&ifr, 0, sizeof(ifr));
76	strncpy(ifr.ifr_name, sr.sr_ifname, sizeof ifr.ifr_name);
77
78	if (ioctl(fd, SIOCGIFADDR, &ifr) == -1)
79	    {
80		perror("ioctl SIOCGIFADDR");
81		return -1;
82	    }
83
84	memcpy(eh->ether_shost, ifr.ifr_addr.sa_data, sizeof(eh->ether_shost));
85
86	if (write(fd, pkt, len) == -1)
87	    {
88		perror("send");
89		return -1;
90	    }
91
92	return len;
93}
94