packet.cpp

//
//  Copyright © 2020 Thomas A. Early, N7TAE
//
// ----------------------------------------------------------------------------
//
//    m17ref is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    m17ref is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    with this software.  If not, see <http://www.gnu.org/licenses/>.
// ----------------------------------------------------------------------------

#include <arpa/inet.h>

#include "packet.h"

CPacket::CPacket(const uint8_t *buf, bool is_internal)
{
	memcpy(m17.frame.magic, buf, is_internal ? sizeof(SRefM17Frame) : sizeof(SM17Frame));
	if (! is_internal)
		m17.relayed = false;
	destination.CodeIn(m17.frame.lich.addr_dst);
	source.CodeIn(m17.frame.lich.addr_src);
}

const CCallsign &CPacket::GetDestCallsign() const
{
	return destination;
}

char CPacket::GetDestModule() const
{
	return destination.GetModule();
}

const CCallsign &CPacket::GetSourceCallsign() const
{
	return source;
}

uint16_t CPacket::GetStreamId() const
{
	return ntohs(m17.frame.streamid);
}

uint16_t CPacket::GetFrameType() const
{
	return ntohs(m17.frame.lich.frametype);
}

uint16_t CPacket::GetCRC() const
{
	return ntohs(m17.frame.crc);
}

void CPacket::SetCRC(uint16_t crc)
{
	m17.frame.crc = htons(crc);
}

void CPacket::SetRelay(bool state)
{
	m17.relayed = state;
}

bool CPacket::GetRelay() const
{
	return m17.relayed;
}

std::unique_ptr<CPacket> CPacket::Duplicate(void) const
{
	return std::unique_ptr<CPacket>(new CPacket(*this));
}

bool CPacket::IsLastPacket() const
{
	return ((0x8000u & ntohs(m17.frame.framenumber)) == 0x8000u);
}

bool CPacket::IsFirstPacket() const
{
	// we don't need ntohs() because we are testing for zero
	return 0x0U == m17.frame.framenumber;
}

SRefM17Frame &CPacket::GetFrame()
{
	return m17;
}