Missing linux/if.h - windows-7

Question

hello I am getting this error when using cygwin to try to make,
this is my makefile
flags=-g
all: icmptx
icmptx: it.o icmptx.o tun_dev.o
gcc $(flags) -o icmptx icmptx.o it.o tun_dev.o
it.o: it.c
gcc $(flags) -c it.c
icmptx.o: icmptx.c
gcc $(flags) -c icmptx.c
tun_dev.o: tun_dev.c
gcc $(flags) -c tun_dev.c
clean:
rm -f tun_dev.o it.o icmptx.o icmptx
the error is
$ make
gcc -g -c tun_dev.c
tun_dev.c:35:22: fatal error: linux/if.h: No such file or directory
compilation terminated.
Makefile:15: recipe for target `tun_dev.o' failed
make: *** [tun_dev.o] Error 1
here is my tun_dev.c file
/*
*/
/*
* tun_dev.c,v 1.1.2.4 2001/09/13 05:02:22 maxk Exp
*/
/* #include "config.h" */
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <linux/if.h>
#include "vtun.h"
#include "lib.h"
/*
* Allocate TUN device, returns opened fd.
* Stores dev name in the first arg(must be large enough).
*/
int tun_open_old(char *dev)
{
char tunname[14];
int i, fd;
if( *dev ) {
sprintf(tunname, "/dev/%s", dev);
return open(tunname, O_RDWR);
}
for(i=0; i < 255; i++){
sprintf(tunname, "/dev/tun%d", i);
/* Open device */
if( (fd=open(tunname, O_RDWR)) > 0 ){
sprintf(dev, "tun%d", i);
return fd;
}
}
return -1;
}
#include <linux/if_tun.h>
/* pre 2.4.6 compatibility */
#define OTUNSETNOCSUM (('T'<< 8) | 200)
#define OTUNSETDEBUG (('T'<< 8) | 201)
#define OTUNSETIFF (('T'<< 8) | 202)
#define OTUNSETPERSIST (('T'<< 8) | 203)
#define OTUNSETOWNER (('T'<< 8) | 204)
int tun_open(char *dev)
{
struct ifreq ifr;
int fd;
if ((fd = open("/dev/net/tun", O_RDWR)) < 0)
return tun_open_old(dev);
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
if (*dev)
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
if (ioctl(fd, TUNSETIFF, (void *) &ifr) < 0) {
if (errno == EBADFD) {
/* Try old ioctl */
if (ioctl(fd, OTUNSETIFF, (void *) &ifr) < 0)
goto failed;
} else
goto failed;
}
strcpy(dev, ifr.ifr_name);
return fd;
failed:
close(fd);
return -1;
}
int tun_close(int fd, char *dev)
{
return close(fd);
}
/* Read/write frames from TUN device */
int tun_write(int fd, char *buf, int len)
{
return write(fd, buf, len);
}
int tun_read(int fd, char *buf, int len)
{
return read(fd, buf, len);
}
any idea, google shows nothing

Answer 1

Try:
#include <net/if.h>
instead.