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143 lines
3.3 KiB
143 lines
3.3 KiB
/*
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* Copyright (C) 2009-2014,2016,2020 by Jonathan Naylor G4KLX
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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; either version 2 of the License, or
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* (at your option) any later version.
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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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "YSFDefines.h"
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#include "Network.h"
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#include "Utils.h"
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#include <cstdio>
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#include <cassert>
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#include <cstring>
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CNetwork::CNetwork(unsigned int port, unsigned int id, const std::string& name, const std::string& description, bool debug) :
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m_socket(port),
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m_id(id),
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m_name(name),
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m_description(description),
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m_callsign(),
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m_debug(debug),
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m_status(NULL)
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{
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m_name.resize(16U, ' ');
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m_description.resize(14U, ' ');
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m_status = new unsigned char[50U];
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}
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CNetwork::~CNetwork()
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{
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delete[] m_status;
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}
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bool CNetwork::open(const std::string& bindaddr)
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{
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if (bindaddr.length() > 0)
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::fprintf(stdout, "Opening YSF network connection on address %s\n", bindaddr.c_str());
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else
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::fprintf(stdout, "Opening YSF network connection on all interfaces\n");
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return m_socket.open(bindaddr);
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}
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bool CNetwork::writeData(const unsigned char* data, const in_addr& address, unsigned int port)
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{
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assert(data != NULL);
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if (m_debug)
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CUtils::dump(1U, "YSF Network Data Sent", data, 155U);
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return m_socket.write(data, 155U, address, port);
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}
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bool CNetwork::writePoll(const in_addr& address, unsigned int port)
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{
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unsigned char buffer[20U];
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buffer[0] = 'Y';
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buffer[1] = 'S';
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buffer[2] = 'F';
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buffer[3] = 'P';
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buffer[4U] = 'R';
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buffer[5U] = 'E';
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buffer[6U] = 'F';
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buffer[7U] = 'L';
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buffer[8U] = 'E';
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buffer[9U] = 'C';
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buffer[10U] = 'T';
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buffer[11U] = 'O';
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buffer[12U] = 'R';
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buffer[13U] = ' ';
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if (m_debug)
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CUtils::dump(1U, "YSF Network Poll Sent", buffer, 14U);
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return m_socket.write(buffer, 14U, address, port);
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}
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unsigned int CNetwork::readData(unsigned char* data, unsigned int length, in_addr& address, unsigned int& port)
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{
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assert(data != NULL);
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assert(length > 0U);
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int len = m_socket.read(data, length, address, port);
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if (len <= 0)
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return 0U;
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// Handle incoming status requests
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if (::memcmp(data, "YSFS", 4U) == 0) {
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m_socket.write(m_status, 42U, address, port);
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return 0U;
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}
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if (m_debug)
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CUtils::dump(1U, "YSF Network Data Received", data, len);
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return len;
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}
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void CNetwork::setCount(unsigned int count)
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{
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if (count > 999U)
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count = 999U;
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unsigned int hash = m_id;
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if (hash == 0U) {
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for (unsigned int i = 0U; i < m_name.size(); i++) {
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hash += m_name.at(i);
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hash += (hash << 10);
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hash ^= (hash >> 6);
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}
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// Final avalanche
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hash += (hash << 3);
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hash ^= (hash >> 11);
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hash += (hash << 15);
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}
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::sprintf((char*)m_status, "YSFS%05u%16.16s%14.14s%03u", hash % 100000U, m_name.c_str(), m_description.c_str(), count);
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}
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void CNetwork::close()
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{
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m_socket.close();
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::fprintf(stdout, "Closing YSF network connection\n");
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}
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