153 lines
4.0 KiB
C
153 lines
4.0 KiB
C
/*
|
|
* Copyright (c) 2001, Swedish Institute of Computer Science.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* Author: Adam Dunkels <adam@sics.se>
|
|
*
|
|
* $Id: tapdev.c,v 1.8 2006/06/07 08:39:58 adam Exp $
|
|
*/
|
|
|
|
#define UIP_DRIPADDR0 192
|
|
#define UIP_DRIPADDR1 168
|
|
#define UIP_DRIPADDR2 0
|
|
#define UIP_DRIPADDR3 1
|
|
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/socket.h>
|
|
|
|
#ifdef linux
|
|
#include <sys/ioctl.h>
|
|
#include <linux/if.h>
|
|
#include <linux/if_tun.h>
|
|
#define DEVTAP "/dev/net/tun"
|
|
#else /* linux */
|
|
#define DEVTAP "/dev/tap0"
|
|
#endif /* linux */
|
|
|
|
#include "uip.h"
|
|
|
|
static int drop = 0;
|
|
static int fd;
|
|
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
tapdev_init(void)
|
|
{
|
|
char buf[1024];
|
|
|
|
fd = open(DEVTAP, O_RDWR);
|
|
if(fd == -1) {
|
|
perror("tapdev: tapdev_init: open");
|
|
exit(1);
|
|
}
|
|
|
|
#ifdef linux
|
|
{
|
|
struct ifreq ifr;
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
ifr.ifr_flags = IFF_TAP|IFF_NO_PI;
|
|
if (ioctl(fd, TUNSETIFF, (void *) &ifr) < 0) {
|
|
perror(buf);
|
|
exit(1);
|
|
}
|
|
}
|
|
#endif /* Linux */
|
|
|
|
snprintf(buf, sizeof(buf), "ifconfig tap0 inet %d.%d.%d.%d",
|
|
UIP_DRIPADDR0, UIP_DRIPADDR1, UIP_DRIPADDR2, UIP_DRIPADDR3);
|
|
system(buf);
|
|
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
unsigned int
|
|
tapdev_read(void)
|
|
{
|
|
fd_set fdset;
|
|
struct timeval tv, now;
|
|
int ret;
|
|
|
|
tv.tv_sec = 0;
|
|
tv.tv_usec = 1000;
|
|
|
|
|
|
FD_ZERO(&fdset);
|
|
FD_SET(fd, &fdset);
|
|
|
|
ret = select(fd + 1, &fdset, NULL, NULL, &tv);
|
|
if(ret == 0) {
|
|
return 0;
|
|
}
|
|
ret = read(fd, uip_buf, UIP_BUFSIZE);
|
|
if(ret == -1) {
|
|
perror("tap_dev: tapdev_read: read");
|
|
}
|
|
|
|
/* printf("--- tap_dev: tapdev_read: read %d bytes\n", ret);*/
|
|
/* {
|
|
int i;
|
|
for(i = 0; i < 20; i++) {
|
|
printf("%x ", uip_buf[i]);
|
|
}
|
|
printf("\n");
|
|
}*/
|
|
/* check_checksum(uip_buf, ret);*/
|
|
return ret;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
tapdev_send(void)
|
|
{
|
|
int ret;
|
|
/* printf("tapdev_send: sending %d bytes\n", size);*/
|
|
/* check_checksum(uip_buf, size);*/
|
|
|
|
/* drop++;
|
|
if(drop % 8 == 7) {
|
|
printf("Dropped a packet!\n");
|
|
return;
|
|
}*/
|
|
ret = write(fd, uip_buf, uip_len);
|
|
if(ret == -1) {
|
|
perror("tap_dev: tapdev_send: writev");
|
|
exit(1);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|