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sirix.c revision 1.1 
      1 /*	$NetBSD: sirix.c,v 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 
     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  */
     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