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