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