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/* $FreeBSD$ */
/*
* (C)opyright 1995-1998 Darren Reed. (from tcplog)
*
* See the IPFILTER.LICENCE file for details on licencing.
*
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/mbuf.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#ifdef __FreeBSD_version
# include <sys/dirent.h>
#else
# include <sys/dir.h>
#endif
#include <net/bpf.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <netinet/tcp.h>
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#ifdef __NetBSD__
# include <paths.h>
#endif
#include <ctype.h>
#include <signal.h>
#include <errno.h>
#include "ipsend.h"
#if !defined(lint)
static const char sccsid[] = "@(#)sbpf.c 1.3 8/25/95 (C)1995 Darren Reed";
static const char rcsid[] = "@(#)$Id$";
#endif
/*
* the code herein is dervied from libpcap.
*/
static u_char *buf = NULL;
static int bufsize = 0, timeout = 1;
int initdevice(device, tout)
char *device;
int tout;
{
struct bpf_version bv;
struct timeval to;
struct ifreq ifr;
#ifdef _PATH_BPF
char *bpfname = _PATH_BPF;
int fd;
if ((fd = open(bpfname, O_RDWR)) < 0)
{
fprintf(stderr, "no bpf devices available as /dev/bpfxx\n");
return -1;
}
#else
char bpfname[16];
int fd = 0, i;
for (i = 0; i < 16; i++)
{
(void) sprintf(bpfname, "/dev/bpf%d", i);
if ((fd = open(bpfname, O_RDWR)) >= 0)
break;
}
if (i == 16)
{
fprintf(stderr, "no bpf devices available as /dev/bpfxx\n");
return -1;
}
#endif
if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0)
{
perror("BIOCVERSION");
return -1;
}
if (bv.bv_major != BPF_MAJOR_VERSION ||
bv.bv_minor < BPF_MINOR_VERSION)
{
fprintf(stderr, "kernel bpf (v%d.%d) filter out of date:\n",
bv.bv_major, bv.bv_minor);
fprintf(stderr, "current version: %d.%d\n",
BPF_MAJOR_VERSION, BPF_MINOR_VERSION);
return -1;
}
(void) strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
if (ioctl(fd, BIOCSETIF, &ifr) == -1)
{
fprintf(stderr, "%s(%d):", ifr.ifr_name, fd);
perror("BIOCSETIF");
exit(1);
}
/*
* get kernel buffer size
*/
if (ioctl(fd, BIOCGBLEN, &bufsize) == -1)
{
perror("BIOCSBLEN");
exit(-1);
}
buf = (u_char*)malloc(bufsize);
/*
* set the timeout
*/
timeout = tout;
to.tv_sec = 1;
to.tv_usec = 0;
if (ioctl(fd, BIOCSRTIMEOUT, (caddr_t)&to) == -1)
{
perror("BIOCSRTIMEOUT");
exit(-1);
}
(void) ioctl(fd, BIOCFLUSH, 0);
return fd;
}
/*
* output an IP packet onto a fd opened for /dev/bpf
*/
int sendip(fd, pkt, len)
int fd, len;
char *pkt;
{
if (write(fd, pkt, len) == -1)
{
perror("send");
return -1;
}
return len;
}
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