| /* |
| * Copyright 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| * tun.h - tun device functions |
| */ |
| #ifndef __TUN_H__ |
| #define __TUN_H__ |
| |
| #include <fcntl.h> |
| #include <linux/if.h> |
| #include <sys/uio.h> |
| #include <unistd.h> |
| |
| #include "common.h" |
| #include "ring.h" |
| |
| struct tun_data { |
| char device4[IFNAMSIZ]; |
| int read_fd6, write_fd6, fd4; |
| struct packet_ring ring; |
| }; |
| |
| // tun_open and tun_alloc are defined in tun.c and only used by clatd_microbenchmark.c |
| int tun_open(); |
| int tun_alloc(char *dev, int fd, size_t len); |
| |
| /* function: send_tun |
| * sends a clat_packet to a tun interface |
| * fd - the tun filedescriptor |
| * out - the packet to send |
| * iov_len - the number of entries in the clat_packet |
| * returns: number of bytes read on success, -1 on failure |
| */ |
| static inline int send_tun(int fd, clat_packet out, int iov_len) { |
| return writev(fd, out, iov_len); |
| } |
| |
| #endif |