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 <fcntl.h> 22 #include <linux/if.h> 23 #include <sys/uio.h> 24 #include <unistd.h> 25 26 #include "common.h" 27 #include "ring.h" 28 29 struct tun_data { 30 char device4[IFNAMSIZ]; 31 int read_fd6, write_fd6, fd4; 32 struct packet_ring ring; 33 }; 34 35 // tun_open and tun_alloc are defined in tun.c and only used by clatd_microbenchmark.c 36 int tun_open(); 37 int tun_alloc(char *dev, int fd, size_t len); 38 39 /* function: send_tun 40 * sends a clat_packet to a tun interface 41 * fd - the tun filedescriptor 42 * out - the packet to send 43 * iov_len - the number of entries in the clat_packet 44 * returns: number of bytes read on success, -1 on failure 45 */ 46 static inline int send_tun(int fd, clat_packet out, int iov_len) { 47 return writev(fd, out, iov_len); 48 } 49 50 #endif 51
