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-rw-r--r--uip/unix/tapdev.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/uip/unix/tapdev.c b/uip/unix/tapdev.c
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+/*
+ * 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);
+ }
+}
+/*---------------------------------------------------------------------------*/