160 lines
3.0 KiB
C
160 lines
3.0 KiB
C
|
|
/*
|
|
* (C)opyright 1992-1998 Darren Reed. (from tcplog)
|
|
*
|
|
* See the IPFILTER.LICENCE file for details on licencing.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <netdb.h>
|
|
#include <ctype.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/timeb.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/file.h>
|
|
#include <sys/ioctl.h>
|
|
#include <net/nit.h>
|
|
#include <sys/fcntlcom.h>
|
|
#include <sys/dir.h>
|
|
#include <net/nit_if.h>
|
|
#include <net/nit_pf.h>
|
|
#include <net/nit_buf.h>
|
|
#include <net/packetfilt.h>
|
|
#include <sys/stropts.h>
|
|
|
|
#include <net/if.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/if_ether.h>
|
|
#include <netinet/ip_var.h>
|
|
#include <netinet/udp.h>
|
|
#include <netinet/udp_var.h>
|
|
#include <netinet/tcp.h>
|
|
|
|
#include "ipsend.h"
|
|
|
|
#if !defined(lint)
|
|
static const char sccsid[] = "@(#)snit.c 1.5 1/11/96 (C)1995 Darren Reed";
|
|
static const char rcsid[] = "@(#)$Id$";
|
|
#endif
|
|
|
|
#define CHUNKSIZE 8192
|
|
#define BUFSPACE (4*CHUNKSIZE)
|
|
|
|
/*
|
|
* Be careful to only include those defined in the flags option for the
|
|
* interface are included in the header size.
|
|
*/
|
|
#define BUFHDR_SIZE (sizeof(struct nit_bufhdr))
|
|
#define NIT_HDRSIZE (BUFHDR_SIZE)
|
|
|
|
static int timeout;
|
|
|
|
|
|
int
|
|
initdevice(char *device, int tout)
|
|
{
|
|
struct strioctl si;
|
|
struct timeval to;
|
|
struct ifreq ifr;
|
|
int fd;
|
|
|
|
if ((fd = open("/dev/nit", O_RDWR)) < 0)
|
|
{
|
|
perror("/dev/nit");
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* arrange to get messages from the NIT STREAM and use NIT_BUF option
|
|
*/
|
|
ioctl(fd, I_SRDOPT, (char*)RMSGD);
|
|
ioctl(fd, I_PUSH, "nbuf");
|
|
|
|
/*
|
|
* set the timeout
|
|
*/
|
|
timeout = tout;
|
|
si.ic_timout = 1;
|
|
to.tv_sec = 1;
|
|
to.tv_usec = 0;
|
|
si.ic_cmd = NIOCSTIME;
|
|
si.ic_len = sizeof(to);
|
|
si.ic_dp = (char*)&to;
|
|
if (ioctl(fd, I_STR, (char*)&si) == -1)
|
|
{
|
|
perror("ioctl: NIT timeout");
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* request the interface
|
|
*/
|
|
strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
|
|
ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = ' ';
|
|
si.ic_cmd = NIOCBIND;
|
|
si.ic_len = sizeof(ifr);
|
|
si.ic_dp = (char*)𝔦
|
|
if (ioctl(fd, I_STR, (char*)&si) == -1)
|
|
{
|
|
perror(ifr.ifr_name);
|
|
exit(1);
|
|
}
|
|
return (fd);
|
|
}
|
|
|
|
|
|
/*
|
|
* output an IP packet onto a fd opened for /dev/nit
|
|
*/
|
|
int
|
|
sendip(int fd, char *pkt, int len)
|
|
int fd, len;
|
|
char *pkt;
|
|
{
|
|
struct sockaddr sk, *sa = &sk;
|
|
struct strbuf cbuf, *cp = &cbuf, dbuf, *dp = &dbuf;
|
|
|
|
/*
|
|
* For ethernet, need at least 802.3 header and IP header.
|
|
*/
|
|
if (len < (sizeof(sa->sa_data) + sizeof(struct ip)))
|
|
return (-1);
|
|
/*
|
|
* to avoid any output processing for IP, say we're not.
|
|
*/
|
|
sa->sa_family = AF_UNSPEC;
|
|
bcopy(pkt, sa->sa_data, sizeof(sa->sa_data));
|
|
pkt += sizeof(sa->sa_data);
|
|
len -= sizeof(sa->sa_data);
|
|
|
|
/*
|
|
* construct NIT STREAMS messages, first control then data.
|
|
*/
|
|
cp->len = sizeof(*sa);
|
|
cp->maxlen = sizeof(*sa);
|
|
cp->buf = (char *)sa;
|
|
|
|
dp->buf = pkt;
|
|
dp->len = len;
|
|
dp->maxlen = dp->len;
|
|
|
|
if (putmsg(fd, cp, dp, 0) == -1)
|
|
{
|
|
perror("putmsg");
|
|
return (-1);
|
|
}
|
|
|
|
if (ioctl(fd, I_FLUSH, FLUSHW) == -1)
|
|
{
|
|
perror("I_FLUSH");
|
|
return (-1);
|
|
}
|
|
return (len);
|
|
}
|