1 /*
2  * Copyright 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  * tun.h - tun device functions
17  */
18 #ifndef __TUN_H__
19 #define __TUN_H__
20 
21 #include <linux/if.h>
22 
23 #include "clatd.h"
24 #include "ring.h"
25 
26 struct tun_data {
27   char device4[IFNAMSIZ];
28   int read_fd6, write_fd6, fd4;
29   struct packet_ring ring;
30 };
31 
32 int tun_open();
33 int tun_alloc(char *dev, int fd);
34 int send_tun(int fd, clat_packet out, int iov_len);
35 int set_nonblocking(int fd);
36 
37 #endif
38