1 /* $NetBSD: sirix.c,v 1.1.1.1 2012/03/23 21:20:07 christos Exp $ */
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)
30 static char sirix[] = "@(#)sirix.c 1.0 10/9/97 (C)1997 Marc Boucher";
31 #endif
32
33
initdevice(char * device,int tout)34 int 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 */
sendip(int fd,char * pkt,int len)62 int 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