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133 lines
2.8 KiB
133 lines
2.8 KiB
/*
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* Copyright (C) 2009-2014,2016,2018,2020 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 "Network.h"
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#include <cstdio>
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#include <cassert>
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#include <cstring>
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const unsigned int BUFFER_LENGTH = 200U;
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CNetwork::CNetwork(unsigned short port) :
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m_socket(port),
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m_addr(),
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m_addrLen(0U)
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{
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}
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CNetwork::~CNetwork()
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{
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}
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bool CNetwork::open()
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{
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::fprintf(stdout, "Opening YSF network connection\n");
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return m_socket.open();
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}
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bool CNetwork::write(const unsigned char* data)
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{
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if (m_addrLen == 0U)
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return true;
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assert(data != NULL);
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return m_socket.write(data, 155U, m_addr, m_addrLen);
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}
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bool CNetwork::writePoll(const sockaddr_storage& addr, unsigned int addrLen)
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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] = 'P';
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buffer[5U] = 'A';
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buffer[6U] = 'R';
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buffer[7U] = 'R';
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buffer[8U] = 'O';
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buffer[9U] = 'T';
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buffer[10U] = ' ';
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buffer[11U] = ' ';
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buffer[12U] = ' ';
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buffer[13U] = ' ';
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return m_socket.write(buffer, 14U, addr, addrLen);
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}
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unsigned int CNetwork::read(unsigned char* data)
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{
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sockaddr_storage addr;
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unsigned int addrLen;
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int length = m_socket.read(data, BUFFER_LENGTH, addr, addrLen);
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if (length <= 0)
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return 0U;
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// Handle incoming polls
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if (::memcmp(data, "YSFP", 4U) == 0) {
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writePoll(addr, addrLen);
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return 0U;
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}
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// Throw away incoming options messages
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if (::memcmp(data, "YSFO", 4U) == 0)
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return 0U;
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// Throw away incoming info messages
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if (::memcmp(data, "YSFI", 4U) == 0)
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return 0U;
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// Handle incoming unlinks
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if (::memcmp(data, "YSFU", 4U) == 0)
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return 0U;
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// Handle the status command
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if (::memcmp(data, "YSFS", 4U) == 0) {
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unsigned char status[50U];
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::sprintf((char*)status, "YSFS%05u%-16.16s%-14.14s%03u", 1U, "Parrot", "Parrot", 0U);
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m_socket.write(status, 42U, addr, addrLen);
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return 0U;
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}
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// Invalid packet type?
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if (::memcmp(data, "YSFD", 4U) != 0)
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return 0U;
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m_addr = addr;
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m_addrLen = addrLen;
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return 155U;
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}
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void CNetwork::end()
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{
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m_addrLen = 0U;
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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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