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93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
// Copyright (C) 2017 Vasily Evseenko <svpcom@p2ptech.org>
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// based on wifibroadcast (c)2015 befinitiv
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __WIFIBROADCAST_HPP__
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#define __WIFIBROADCAST_HPP__
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <resolv.h>
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#include <string.h>
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#include <utime.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <pcap.h>
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#include <endian.h>
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#include <fcntl.h>
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#include <time.h>
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#include <sys/mman.h>
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#define MAX_PACKET_SIZE 1510
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#define MAX_RX_INTERFACES 8
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using namespace std;
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template<typename ... Args>
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string string_format( const std::string& format, Args ... args )
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{
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size_t size = snprintf(nullptr, 0, format.c_str(), args ...) + 1; // Extra space for '\0'
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unique_ptr<char[]> buf(new char[ size ]);
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snprintf(buf.get(), size, format.c_str(), args ...);
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return string(buf.get(), buf.get() + size - 1); // We don't want the '\0' inside
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}
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/* this is the template radiotap header we send packets out with */
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static const uint8_t radiotap_header[] = {
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0x00, 0x00, // <-- radiotap version
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0x0c, 0x00, // <- radiotap header lengt
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0x04, 0x80, 0x00, 0x00, // <-- radiotap present flags
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0x00, // Rate, offset 0x8
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0x00,
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0x18, 0x00
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};
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//the last byte of the mac address is recycled as a port number
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#define SRC_MAC_LASTBYTE 15
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#define DST_MAC_LASTBYTE 21
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static uint8_t ieee80211_header[] = {
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0x08, 0x01, 0x00, 0x00,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0x13, 0x22, 0x33, 0x44, 0x55, 0x66,
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0x13, 0x22, 0x33, 0x44, 0x55, 0x66,
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0x10, 0x86,
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};
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typedef struct {
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uint8_t block_idx;
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uint8_t fragment_idx;
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} __attribute__ ((packed)) wblock_hdr_t;
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typedef struct {
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uint32_t seq;
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uint16_t packet_size;
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} __attribute__ ((packed)) wpacket_hdr_t;
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#define MAX_PAYLOAD_SIZE (MAX_PACKET_SIZE - sizeof(radiotap_header) - sizeof(ieee80211_header) - sizeof(wblock_hdr_t) - sizeof(wpacket_hdr_t))
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#define MAX_FEC_PAYLOAD (MAX_PACKET_SIZE - sizeof(radiotap_header) - sizeof(ieee80211_header) - sizeof(wblock_hdr_t))
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#define MAX_FORWARDER_PACKET_SIZE (MAX_PACKET_SIZE - sizeof(radiotap_header) - sizeof(ieee80211_header))
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int open_udp_socket_for_rx(int port);
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#endif
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