mirror of
https://github.com/svpcom/wfb-ng.git
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109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
// -*- C++ -*-
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//
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// Copyright (C) 2017 Vasily Evseenko <svpcom@p2ptech.org>
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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 3.
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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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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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using namespace std;
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class Transmitter
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{
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public:
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Transmitter(int k, int m, const string &keypair);
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virtual ~Transmitter();
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void send_packet(const uint8_t *buf, size_t size);
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void send_session_key(void);
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protected:
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virtual void inject_packet(const uint8_t *buf, size_t size) = 0;
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private:
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void send_block_fragment(size_t packet_size);
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fec_t* fec_p;
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int fec_k; // RS number of primary fragments in block
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int fec_n; // RS total number of fragments in block
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uint64_t block_idx; //block_idx << 8 + fragment_idx = nonce (64bit)
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uint8_t fragment_idx;
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uint8_t** block;
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size_t max_packet_size;
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// tx->rx keypair
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uint8_t tx_secretkey[crypto_box_SECRETKEYBYTES];
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uint8_t rx_publickey[crypto_box_PUBLICKEYBYTES];
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uint8_t session_key[crypto_aead_chacha20poly1305_KEYBYTES];
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wsession_key_t session_key_packet;
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};
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class PcapTransmitter : public Transmitter
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{
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public:
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PcapTransmitter(int k, int m, const string &keypair, uint8_t radio_port, const char* wlan);
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virtual ~PcapTransmitter();
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private:
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virtual void inject_packet(const uint8_t *buf, size_t size);
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uint8_t radio_port;
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string wlan;
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uint16_t ieee80211_seq;
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pcap_t *ppcap;
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};
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class UdpTransmitter : public Transmitter
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{
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public:
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UdpTransmitter(int k, int m, const string &keypair, const string &client_addr, int client_port) : Transmitter(k, m, keypair)
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{
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sockfd = open_udp_socket(client_addr, client_port);
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}
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virtual ~UdpTransmitter()
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{
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close(sockfd);
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}
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private:
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virtual void inject_packet(const uint8_t *buf, size_t size)
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{
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send(sockfd, buf, size, 0);
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}
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int open_udp_socket(const string &client_addr, int client_port)
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{
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struct sockaddr_in saddr;
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int fd = socket(AF_INET, SOCK_DGRAM, 0);
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if (fd < 0) throw runtime_error(string_format("Error opening socket: %s", strerror(errno)));
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bzero((char *) &saddr, sizeof(saddr));
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saddr.sin_family = AF_INET;
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saddr.sin_addr.s_addr = inet_addr(client_addr.c_str());
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saddr.sin_port = htons((unsigned short)client_port);
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if (connect(fd, (struct sockaddr *) &saddr, sizeof(saddr)) < 0)
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{
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throw runtime_error(string_format("Connect error: %s", strerror(errno)));
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}
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return fd;
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}
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int sockfd;
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};
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