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xlxd/src/cdmrplusprotocol.cpp

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//
// cdmrplusprotocol.cpp
// xlxd
//
// Created by Jean-Luc Deltombe (LX3JL) on 10/01/2016.
// Copyright © 2015 Jean-Luc Deltombe (LX3JL). All rights reserved.
//
// ----------------------------------------------------------------------------
// This file is part of xlxd.
//
// xlxd 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.
//
// xlxd 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
// along with Foobar. If not, see <http://www.gnu.org/licenses/>.
// ----------------------------------------------------------------------------
#include "main.h"
#include <string.h>
#include "cdmrplusclient.h"
#include "cdmrplusprotocol.h"
#include "creflector.h"
#include "cgatekeeper.h"
#include "cdmriddir.h"
#include "cbptc19696.h"
#include "crs129.h"
#include "cgolay2087.h"
#include "cqr1676.h"
////////////////////////////////////////////////////////////////////////////////////////
// constants
static uint8 g_DmrSyncBSVoice[] = { 0x07,0x55,0xFD,0x7D,0xF7,0x5F,0x70 };
static uint8 g_DmrSyncBSData[] = { 0x0D,0xFF,0x57,0xD7,0x5D,0xF5,0xD0 };
static uint8 g_DmrSyncMSVoice[] = { 0x07,0xF7,0xD5,0xDD,0x57,0xDF,0xD0 };
static uint8 g_DmrSyncMSData[] = { 0x0D,0x5D,0x7F,0x77,0xFD,0x75,0x70 };
////////////////////////////////////////////////////////////////////////////////////////
// operation
bool CDmrplusProtocol::Init(void)
{
bool ok;
// base class
ok = CProtocol::Init();
// update the reflector callsign
//m_ReflectorCallsign.PatchCallsign(0, (const uint8 *)"DMR", 3);
// create our socket
ok &= m_Socket.Open(DMRPLUS_PORT);
// update time
m_LastKeepaliveTime.Now();
// random number generator
time_t t;
::srand((unsigned) time(&t));
// done
return ok;
}
////////////////////////////////////////////////////////////////////////////////////////
// task
void CDmrplusProtocol::Task(void)
{
CBuffer Buffer;
CIp Ip;
CCallsign Callsign;
char ToLinkModule;
CDvHeaderPacket *Header;
CDvFramePacket *Frames[3];
// handle incoming packets
if ( m_Socket.Receive(&Buffer, &Ip, 20) != -1 )
{
// crack the packet
if ( IsValidDvFramePacket(Ip, Buffer, Frames) )
{
//std::cout << "DMRplus DV frame" << std::endl;
//Buffer.DebugDump(g_Reflector.m_DebugFile);
for ( int i = 0; i < 3; i++ )
{
OnDvFramePacketIn(Frames[i], &Ip);
/*if ( !Frames[i]->IsLastPacket() )
{
//std::cout << "DMRplus DV frame" << std::endl;
OnDvFramePacketIn(Frames[i], &Ip);
}
else
{
//std::cout << "DMRplus DV last frame" << std::endl;
OnDvLastFramePacketIn((CDvLastFramePacket *)Frames[i], &Ip);
}*/
}
}
else if ( IsValidDvHeaderPacket(Ip, Buffer, &Header) )
{
//std::cout << "DMRplus DV header:" << std::endl;
//std::cout << "DMRplus DV header:" << std::endl << *Header << std::endl;
//Buffer.DebugDump(g_Reflector.m_DebugFile);
// callsign muted?
if ( g_GateKeeper.MayTransmit(Header->GetMyCallsign(), Ip, PROTOCOL_DMRPLUS) )
{
// handle it
OnDvHeaderPacketIn(Header, Ip);
}
else
{
delete Header;
}
}
else if ( IsValidConnectPacket(Buffer, &Callsign, &ToLinkModule, Ip) )
{
//std::cout << "DMRplus keepalive/connect packet for module " << ToLinkModule << " from " << Callsign << " at " << Ip << std::endl;
// callsign authorized?
if ( g_GateKeeper.MayLink(Callsign, Ip, PROTOCOL_DMRPLUS) )
{
// acknowledge the request
EncodeConnectAckPacket(&Buffer);
m_Socket.Send(Buffer, Ip);
// add client if needed
CClients *clients = g_Reflector.GetClients();
CClient *client = clients->FindClient(Callsign, Ip, PROTOCOL_DMRPLUS);
// client already connected ?
if ( client == NULL )
{
std::cout << "DMRplus connect packet for module " << ToLinkModule << " from " << Callsign << " at " << Ip << std::endl;
// create the client
CDmrplusClient *newclient = new CDmrplusClient(Callsign, Ip, ToLinkModule);
// and append
clients->AddClient(newclient);
}
else
{
client->Alive();
}
// and done
g_Reflector.ReleaseClients();
}
else
{
// deny the request
EncodeConnectNackPacket(&Buffer);
m_Socket.Send(Buffer, Ip);
}
}
else if ( IsValidDisconnectPacket(Buffer, &Callsign, &ToLinkModule) )
{
std::cout << "DMRplus disconnect packet for module " << ToLinkModule << " from " << Callsign << " at " << Ip << std::endl;
// find client & remove it
CClients *clients = g_Reflector.GetClients();
CClient *client = clients->FindClient(Ip, PROTOCOL_DMRPLUS);
if ( client != NULL )
{
clients->RemoveClient(client);
}
g_Reflector.ReleaseClients();
}
else
{
//std::cout << "DMRPlus packet (" << Buffer.size() << ")" << " at " << Ip << std::endl;
}
}
// handle end of streaming timeout
CheckStreamsTimeout();
// handle queue from reflector
HandleQueue();
// keep client alive
if ( m_LastKeepaliveTime.DurationSinceNow() > DMRPLUS_KEEPALIVE_PERIOD )
{
//
HandleKeepalives();
// update time
m_LastKeepaliveTime.Now();
}
}
////////////////////////////////////////////////////////////////////////////////////////
// streams helpers
bool CDmrplusProtocol::OnDvHeaderPacketIn(CDvHeaderPacket *Header, const CIp &Ip)
{
bool newstream = false;
// find the stream
CPacketStream *stream = GetStream(Header->GetStreamId());
if ( stream == NULL )
{
// no stream open yet, open a new one
// find this client
CClient *client = g_Reflector.GetClients()->FindClient(Ip, PROTOCOL_DMRPLUS);
if ( client != NULL )
{
// and try to open the stream
if ( (stream = g_Reflector.OpenStream(Header, client)) != NULL )
{
// keep the handle
m_Streams.push_back(stream);
newstream = true;
}
}
// release
g_Reflector.ReleaseClients();
}
else
{
// stream already open
// skip packet, but tickle the stream
stream->Tickle();
// and delete packet
delete Header;
}
// update last heard
g_Reflector.GetUsers()->Hearing(Header->GetMyCallsign(), Header->GetRpt1Callsign(), Header->GetRpt2Callsign());
g_Reflector.ReleaseUsers();
// delete header if needed
if ( !newstream )
{
delete Header;
}
// done
return newstream;
}
////////////////////////////////////////////////////////////////////////////////////////
// queue helper
void CDmrplusProtocol::HandleQueue(void)
{
m_Queue.Lock();
while ( !m_Queue.empty() )
{
// get the packet
CPacket *packet = m_Queue.front();
m_Queue.pop();
// get our sender's id
int iModId = g_Reflector.GetModuleIndex(packet->GetModuleId());
// encode
CBuffer buffer;
// check if it's header
if ( packet->IsDvHeader() )
{
// update local stream cache
// this relies on queue feeder setting valid module id
m_StreamsCache[iModId].m_dvHeader = CDvHeaderPacket((const CDvHeaderPacket &)*packet);
m_StreamsCache[iModId].m_uiSeqId = 4;
// encode it
EncodeDvHeaderPacket((const CDvHeaderPacket &)*packet, &buffer);
}
else
{
// update local stream cache or send triplet when needed
switch ( packet->GetDmrPacketSubid() )
{
case 1:
m_StreamsCache[iModId].m_dvFrame0 = CDvFramePacket((const CDvFramePacket &)*packet);
break;
case 2:
m_StreamsCache[iModId].m_dvFrame1 = CDvFramePacket((const CDvFramePacket &)*packet);
break;
case 3:
EncodeDvPacket(
m_StreamsCache[iModId].m_dvHeader,
m_StreamsCache[iModId].m_dvFrame0,
m_StreamsCache[iModId].m_dvFrame1,
(const CDvFramePacket &)*packet,
m_StreamsCache[iModId].m_uiSeqId,
&buffer);
m_StreamsCache[iModId].m_uiSeqId = GetNextSeqId(m_StreamsCache[iModId].m_uiSeqId);
break;
default:
break;
}
}
// send it
if ( buffer.size() > 0 )
{
// and push it to all our clients linked to the module and who are not streaming in
CClients *clients = g_Reflector.GetClients();
int index = -1;
CClient *client = NULL;
while ( (client = clients->FindNextClient(PROTOCOL_DMRPLUS, &index)) != NULL )
{
// is this client busy ?
if ( !client->IsAMaster() && (client->GetReflectorModule() == packet->GetModuleId()) )
{
// no, send the packet
m_Socket.Send(buffer, client->GetIp());
}
}
g_Reflector.ReleaseClients();
// debug
//buffer.DebugDump(g_Reflector.m_DebugFile);
}
// done
delete packet;
}
m_Queue.Unlock();
}
void CDmrplusProtocol::SendBufferToClients(const CBuffer &buffer, uint8 module)
{
if ( buffer.size() > 0 )
{
// and push it to all our clients linked to the module and who are not streaming in
CClients *clients = g_Reflector.GetClients();
int index = -1;
CClient *client = NULL;
while ( (client = clients->FindNextClient(PROTOCOL_DMRPLUS, &index)) != NULL )
{
// is this client busy ?
if ( !client->IsAMaster() && (client->GetReflectorModule() == module) )
{
// no, send the packet
m_Socket.Send(buffer, client->GetIp());
}
}
g_Reflector.ReleaseClients();
// debug
//buffer.DebugDump(g_Reflector.m_DebugFile);
}
}
////////////////////////////////////////////////////////////////////////////////////////
// keepalive helpers
void CDmrplusProtocol::HandleKeepalives(void)
{
// DMRplus protocol keepalive request is client tasks
// here, just check that all clients are still alive
// and disconnect them if not
// iterate on clients
CClients *clients = g_Reflector.GetClients();
int index = -1;
CClient *client = NULL;
while ( (client = clients->FindNextClient(PROTOCOL_DMRPLUS, &index)) != NULL )
{
// is this client busy ?
if ( client->IsAMaster() )
{
// yes, just tickle it
client->Alive();
}
// check it's still with us
else if ( !client->IsAlive() )
{
// no, disconnect
//CBuffer disconnect;
//EncodeDisconnectPacket(&disconnect, client);
//m_Socket.Send(disconnect, client->GetIp());
// remove it
std::cout << "DMRplus client " << client->GetCallsign() << " keepalive timeout" << std::endl;
clients->RemoveClient(client);
}
}
g_Reflector.ReleaseClients();
}
////////////////////////////////////////////////////////////////////////////////////////
// packet decoding helpers
bool CDmrplusProtocol::IsValidConnectPacket(const CBuffer &Buffer, CCallsign *callsign, char *reflectormodule, const CIp &Ip)
{
bool valid = false;
if ( Buffer.size() == 31 )
{
char sz[9];
::memcpy(sz, Buffer.data(), 8);
sz[8] = 0;
uint32 dmrid = atoi(sz);
callsign->SetDmrid(dmrid, true);
callsign->SetModule(DMRPLUS_MODULE_ID);
::memcpy(sz, &Buffer.data()[8], 4);
sz[4] = 0;
*reflectormodule = DmrDstIdToModule(atoi(sz));
valid = (callsign->IsValid() && (std::isupper(*reflectormodule) || (*reflectormodule == ' ')) );
if ( !valid)
{
std::cout << "DMRplus connect packet from IP address " << Ip << " / unrecognized id " << (int)callsign->GetDmrid() << std::endl;
}
}
return valid;
}
bool CDmrplusProtocol::IsValidDisconnectPacket(const CBuffer &Buffer, CCallsign *callsign, char *reflectormodule)
{
bool valid = false;
if ( Buffer.size() == 32 )
{
char sz[9];
::memcpy(sz, Buffer.data(), 8);
sz[8] = 0;
uint32 dmrid = atoi(sz);
callsign->SetDmrid(dmrid, true);
callsign->SetModule(DMRPLUS_MODULE_ID);
*reflectormodule = Buffer.data()[11] - '0' + 'A';
valid = (callsign->IsValid() && std::isupper(*reflectormodule));
}
return valid;
}
bool CDmrplusProtocol::IsValidDvHeaderPacket(const CIp &Ip, const CBuffer &Buffer, CDvHeaderPacket **Header)
{
bool valid = false;
*Header = NULL;
uint8 uiPacketType = Buffer.data()[8];
if ( (Buffer.size() == 72) && ( uiPacketType == 2 ) )
{
// frame details
uint8 uiSlot = (Buffer.data()[16] == 0x22) ? DMR_SLOT2 : DMR_SLOT1;
uint8 uiCallType = (Buffer.data()[62] == 1) ? DMR_GROUP_CALL : DMR_PRIVATE_CALL;
uint8 uiColourCode = Buffer.data()[20] & 0x0F;
if ( (uiSlot == DMRPLUS_REFLECTOR_SLOT) && (uiCallType == DMR_GROUP_CALL) && (uiColourCode == DMRPLUS_REFLECTOR_COLOUR) )
{
// more frames details
//uint8 uiSeqId = Buffer.data()[4];
//uint8 uiVoiceSeq = (Buffer.data()[18] & 0x0F) - 7; // aka slot type
uint32 uiDstId = *(uint32 *)(&Buffer.data()[64]) & 0x00FFFFFF;
uint32 uiSrcId = *(uint32 *)(&Buffer.data()[68]) & 0x00FFFFFF;
// build DVHeader
CCallsign csMY = CCallsign("", uiSrcId);
CCallsign rpt1 = CCallsign("", uiSrcId);
rpt1.SetModule(DMRPLUS_MODULE_ID);
CCallsign rpt2 = m_ReflectorCallsign;
rpt2.SetModule(DmrDstIdToModule(uiDstId));
uint32 uiStreamId = IpToStreamId(Ip);
// and packet
*Header = new CDvHeaderPacket(uiSrcId, CCallsign("CQCQCQ"), rpt1, rpt2, uiStreamId, 0, 0);
valid = (*Header)->IsValid();
if ( !valid )
{
delete *Header;
*Header = NULL;
}
}
}
// done
return valid;
}
bool CDmrplusProtocol::IsValidDvFramePacket(const CIp &Ip, const CBuffer &Buffer, CDvFramePacket **frames)
{
bool valid = false;
frames[0] = NULL;
frames[1] = NULL;
frames[2] = NULL;
uint8 uiPacketType = Buffer.data()[8];
if ( (Buffer.size() == 72) && ((uiPacketType == 1) || (uiPacketType == 3)) )
{
// frame details
uint8 uiSlot = (Buffer.data()[16] == 0x22) ? DMR_SLOT2 : DMR_SLOT1;
uint8 uiCallType = (Buffer.data()[62] == 1) ? DMR_GROUP_CALL : DMR_PRIVATE_CALL;
uint8 uiColourCode = Buffer.data()[20] & 0x0F;
if ( (uiSlot == DMRPLUS_REFLECTOR_SLOT) && (uiCallType == DMR_GROUP_CALL) && (uiColourCode == DMRPLUS_REFLECTOR_COLOUR) )
{
// more frames details
//uint8 uiSeqId = Buffer.data()[4];
uint8 uiVoiceSeq = (Buffer.data()[18] & 0x0F) - 7; // aka slot type
//uint32 uiDstId = *(uint32 *)(&Buffer.data()[64]) & 0x00FFFFFF;
//uint32 uiSrcId = *(uint32 *)(&Buffer.data()[68]) & 0x00FFFFFF;
// crack payload
uint8 dmrframe[33];
uint8 dmr3ambe[27];
uint8 dmrambe[9];
uint8 dmrsync[7];
// get the 33 bytes ambe
memcpy(dmrframe, &(Buffer.data()[26]), 33);
// handle endianess
SwapEndianess(dmrframe, sizeof(dmrframe));
// extract the 3 ambe frames
memcpy(dmr3ambe, dmrframe, 14);
dmr3ambe[13] &= 0xF0;
dmr3ambe[13] |= (dmrframe[19] & 0x0F);
memcpy(&dmr3ambe[14], &dmrframe[20], 13);
// extract sync
dmrsync[0] = dmrframe[13] & 0x0F;
::memcpy(&dmrsync[1], &dmrframe[14], 5);
dmrsync[6] = dmrframe[19] & 0xF0;
// and create 3 dv frames
uint32 uiStreamId = IpToStreamId(Ip);
// frame1
memcpy(dmrambe, &dmr3ambe[0], 9);
frames[0] = new CDvFramePacket(dmrambe, dmrsync, uiStreamId, uiVoiceSeq, 1);
// frame2
memcpy(dmrambe, &dmr3ambe[9], 9);
frames[1] = new CDvFramePacket(dmrambe, dmrsync, uiStreamId, uiVoiceSeq, 2);
// frame3
memcpy(dmrambe, &dmr3ambe[18], 9);
if ( uiPacketType == 3 )
{
frames[2] = new CDvLastFramePacket(dmrambe, dmrsync, uiStreamId, uiVoiceSeq, 3);
}
else
{
frames[2] = new CDvFramePacket(dmrambe, dmrsync, uiStreamId, uiVoiceSeq, 3);
}
// check
valid = true;
}
}
// done
return valid;
}
////////////////////////////////////////////////////////////////////////////////////////
// packet encoding helpers
void CDmrplusProtocol::EncodeConnectAckPacket(CBuffer *Buffer)
{
uint8 tag[] = { 'A','C','K',' ','O','K',0x0A,0x00 };
Buffer->Set(tag, sizeof(tag));
}
void CDmrplusProtocol::EncodeConnectNackPacket(CBuffer *Buffer)
{
uint8 tag[] = { 'N','A','K',' ','O','K',0x0A,0x00 };
Buffer->Set(tag, sizeof(tag));
}
bool CDmrplusProtocol::EncodeDvHeaderPacket(const CDvHeaderPacket &Packet, CBuffer *Buffer) const
{
uint8 tag[] = { 0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x02,
0x00,0x05,0x01,0x02,0x00,0x00,0x00 } ;
Buffer->Set(tag, sizeof(tag));
// uiSeqId
//Buffer->ReplaceAt(4, 2);
// uiPktType
//Buffer->ReplaceAt(8, 2);
// uiSlot
Buffer->Append((uint16)((DMRPLUS_REFLECTOR_SLOT == DMR_SLOT1) ? 0x1111 : 0x2222));
// uiSlotType
Buffer->Append((uint16)0xEEEE);
// uiColourCode
uint8 uiColourCode = DMRPLUS_REFLECTOR_COLOUR | (DMRPLUS_REFLECTOR_COLOUR << 4);
Buffer->Append((uint8)uiColourCode);
Buffer->Append((uint8)uiColourCode);
// uiFrameType
Buffer->Append((uint16)0x1111);
// reserved
Buffer->Append((uint16)0x0000);
// payload
uint32 uiSrcId = Packet.GetMyCallsign().GetDmrid() & 0x00FFFFFF;
uint32 uiDstId = ModuleToDmrDestId(Packet.GetRpt2Module()) & 0x00FFFFFF;
Buffer->Append((uint8)0x00, 34);
Buffer->ReplaceAt(36, HIBYTE(HIWORD(uiSrcId)));
Buffer->ReplaceAt(38, LOBYTE(HIWORD(uiSrcId)));
Buffer->ReplaceAt(40, HIBYTE(LOWORD(uiSrcId)));
Buffer->ReplaceAt(42, LOBYTE(LOWORD(uiSrcId)));
// reserved
Buffer->Append((uint16)0x0000);
// uiCallType
Buffer->Append((uint8)0x01);
// reserved
Buffer->Append((uint8)0x00);
// uiDstId
Buffer->Append(uiDstId);
// uiSrcId
Buffer->Append(uiSrcId);
// done
return true;
}
void CDmrplusProtocol::EncodeDvPacket
(const CDvHeaderPacket &Header,
const CDvFramePacket &DvFrame0, const CDvFramePacket &DvFrame1, const CDvFramePacket &DvFrame2,
uint8 seqid, CBuffer *Buffer) const
{
uint8 tag[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,
0x00,0x05,0x01,0x02,0x00,0x00,0x00 } ;
Buffer->Set(tag, sizeof(tag));
// uiSeqId
Buffer->ReplaceAt(4, seqid);
// uiPktType
//Buffer->ReplaceAt(8, 1);
// uiSlot
Buffer->Append((uint16)((DMRPLUS_REFLECTOR_SLOT == DMR_SLOT1) ? 0x1111 : 0x2222));
// uiVoiceSeq
uint8 uiVoiceSeq = (DvFrame0.GetDmrPacketId() + 7) | ((DvFrame0.GetDmrPacketId() + 7) << 4);
Buffer->Append((uint8)uiVoiceSeq);
Buffer->Append((uint8)uiVoiceSeq);
// uiColourCode
uint8 uiColourCode = DMRPLUS_REFLECTOR_COLOUR | (DMRPLUS_REFLECTOR_COLOUR << 4);
Buffer->Append((uint8)uiColourCode);
Buffer->Append((uint8)uiColourCode);
// uiFrameType
Buffer->Append((uint16)0x1111);
// reserved
Buffer->Append((uint16)0x0000);
// payload
uint32 uiSrcId = Header.GetMyCallsign().GetDmrid() & 0x00FFFFFF;
uint32 uiDstId = ModuleToDmrDestId(Header.GetRpt2Module()) & 0x00FFFFFF;
// frame0
Buffer->ReplaceAt(26, DvFrame0.GetAmbePlus(), 9);
// 1/2 frame1
Buffer->ReplaceAt(35, DvFrame1.GetAmbePlus(), 5);
Buffer->ReplaceAt(39, (uint8)(Buffer->at(39) & 0xF0));
// 1/2 frame1
Buffer->ReplaceAt(45, DvFrame1.GetAmbePlus()+4, 5);
Buffer->ReplaceAt(45, (uint8)(Buffer->at(45) & 0x0F));
// frame2
Buffer->ReplaceAt(50, DvFrame2.GetAmbePlus(), 9);
// sync or embedded signaling
ReplaceEMBInBuffer(Buffer, DvFrame0.GetDmrPacketId());
// reserved
Buffer->Append((uint16)0x0000);
Buffer->Append((uint8)0x00);
// uiCallType
Buffer->Append((uint8)0x01);
// reserved
Buffer->Append((uint8)0x00);
// uiDstId
Buffer->Append(uiDstId);
// uiSrcId
Buffer->Append(uiSrcId);
// handle indianess
SwapEndianess(&(Buffer->data()[26]), 34);
}
void CDmrplusProtocol::EncodeDvLastPacket
(const CDvHeaderPacket &Header,
const CDvFramePacket &DvFrame0, const CDvFramePacket &DvFrame1, const CDvFramePacket &DvFrame2,
uint8 seqid, CBuffer *Buffer) const
{
EncodeDvPacket(Header, DvFrame0, DvFrame1, DvFrame2, seqid, Buffer);
Buffer->ReplaceAt(8, (uint8)3);
Buffer->ReplaceAt(18, (uint16)0x2222);
}
void CDmrplusProtocol::SwapEndianess(uint8 *buffer, int len) const
{
for ( int i = 0; i < len; i += 2 )
{
uint8 t = buffer[i];
buffer[i] = buffer[i+1];
buffer[i+1] = t;
}
}
////////////////////////////////////////////////////////////////////////////////////////
// SeqId helper
uint8 CDmrplusProtocol::GetNextSeqId(uint8 uiSeqId) const
{
return (uiSeqId + 1) & 0xFF;
}
////////////////////////////////////////////////////////////////////////////////////////
// DestId to Module helper
char CDmrplusProtocol::DmrDstIdToModule(uint32 tg) const
{
// is it a 4xxx ?
if ( (tg >= 4001) && (tg <= (4000 + NB_OF_MODULES)) )
{
return ((char)(tg - 4001) + 'A');
}
return ' ';
}
uint32 CDmrplusProtocol::ModuleToDmrDestId(char m) const
{
return (uint32)(m - 'A')+4001;
}
////////////////////////////////////////////////////////////////////////////////////////
// Buffer & LC helpers
void CDmrplusProtocol::AppendVoiceLCToBuffer(CBuffer *buffer, uint32 uiSrcId) const
{
uint8 payload[34];
// fill payload
CBPTC19696 bptc;
::memset(payload, 0, sizeof(payload));
// LC data
uint8 lc[12];
{
::memset(lc, 0, sizeof(lc));
// uiDstId = TG9
lc[5] = 9;
// uiSrcId
lc[6] = (uint8)LOBYTE(HIWORD(uiSrcId));
lc[7] = (uint8)HIBYTE(LOWORD(uiSrcId));
lc[8] = (uint8)LOBYTE(LOWORD(uiSrcId));
// parity
uint8 parity[4];
CRS129::encode(lc, 9, parity);
lc[9] = parity[2] ^ DMR_VOICE_LC_HEADER_CRC_MASK;
lc[10] = parity[1] ^ DMR_VOICE_LC_HEADER_CRC_MASK;
lc[11] = parity[0] ^ DMR_VOICE_LC_HEADER_CRC_MASK;
}
// sync
::memcpy(payload+13, g_DmrSyncBSData, sizeof(g_DmrSyncBSData));
// slot type
{
// slot type
uint8 slottype[3];
::memset(slottype, 0, sizeof(slottype));
slottype[0] = (DMRPLUS_REFLECTOR_COLOUR << 4) & 0xF0;
slottype[0] |= (DMR_DT_VOICE_LC_HEADER << 0) & 0x0FU;
CGolay2087::encode(slottype);
payload[12U] = (payload[12U] & 0xC0U) | ((slottype[0U] >> 2) & 0x3FU);
payload[13U] = (payload[13U] & 0x0FU) | ((slottype[0U] << 6) & 0xC0U) | ((slottype[1U] >> 2) & 0x30U);
payload[19U] = (payload[19U] & 0xF0U) | ((slottype[1U] >> 2) & 0x0FU);
payload[20U] = (payload[20U] & 0x03U) | ((slottype[1U] << 6) & 0xC0U) | ((slottype[2U] >> 2) & 0x3CU);
}
// and encode
bptc.encode(lc, payload);
// and append
buffer->Append(payload, sizeof(payload));
}
void CDmrplusProtocol::ReplaceEMBInBuffer(CBuffer *buffer, uint8 uiDmrPacketId) const
{
// voice packet A ?
if ( uiDmrPacketId == 0 )
{
// sync
buffer->ReplaceAt(39, (uint8)(buffer->at(39) | (g_DmrSyncBSVoice[0] & 0x0F)));
buffer->ReplaceAt(40, g_DmrSyncBSVoice+1, 5);
buffer->ReplaceAt(45, (uint8)(buffer->at(45) | (g_DmrSyncBSVoice[6] & 0xF0)));
}
// voice packet B,C,D,E ?
else if ( (uiDmrPacketId >= 1) && (uiDmrPacketId <= 4 ) )
{
// EMB LC
uint8 emb[2];
emb[0] = (DMRMMDVM_REFLECTOR_COLOUR << 4) & 0xF0;
//emb[0] |= PI ? 0x08U : 0x00;
//emb[0] |= (LCSS << 1) & 0x06;
emb[1] = 0x00;
// encode
CQR1676::encode(emb);
// and append
buffer->ReplaceAt(39, (uint8)((buffer->at(39) & 0xF0) | ((emb[0U] >> 4) & 0x0F)));
buffer->ReplaceAt(40, (uint8)((buffer->at(40) & 0x0F) | ((emb[0U] << 4) & 0xF0)));
buffer->ReplaceAt(40, (uint8)(buffer->at(40) & 0xF0));
buffer->ReplaceAt(41, (uint8)0);
buffer->ReplaceAt(42, (uint8)0);
buffer->ReplaceAt(43, (uint8)0);
buffer->ReplaceAt(44, (uint8)(buffer->at(44) & 0x0F));
buffer->ReplaceAt(44, (uint8)((buffer->at(44) & 0xF0) | ((emb[1U] >> 4) & 0x0F)));
buffer->ReplaceAt(45, (uint8)((buffer->at(45) & 0x0F) | ((emb[1U] << 4) & 0xF0)));
}
// voice packet F
else
{
// NULL
uint8 emb[2];
emb[0] = (DMRMMDVM_REFLECTOR_COLOUR << 4) & 0xF0;
//emb[0] |= PI ? 0x08U : 0x00;
//emb[0] |= (LCSS << 1) & 0x06;
emb[1] = 0x00;
// encode
CQR1676::encode(emb);
// and append
buffer->ReplaceAt(39, (uint8)((buffer->at(39) & 0xF0) | ((emb[0U] >> 4) & 0x0F)));
buffer->ReplaceAt(40, (uint8)((buffer->at(40) & 0x0F) | ((emb[0U] << 4) & 0xF0)));
buffer->ReplaceAt(40, (uint8)(buffer->at(40) & 0xF0));
buffer->ReplaceAt(41, (uint8)0);
buffer->ReplaceAt(42, (uint8)0);
buffer->ReplaceAt(43, (uint8)0);
buffer->ReplaceAt(44, (uint8)(buffer->at(44) & 0x0F));
buffer->ReplaceAt(44, (uint8)((buffer->at(44) & 0xF0) | ((emb[1U] >> 4) & 0x0F)));
buffer->ReplaceAt(45, (uint8)((buffer->at(45) & 0x0F) | ((emb[1U] << 4) & 0xF0)));
}
}
////////////////////////////////////////////////////////////////////////////////////////
// uiStreamId helpers
// uiStreamId helpers
uint32 CDmrplusProtocol::IpToStreamId(const CIp &ip) const
{
return ip.GetAddr() ^ (uint32)(MAKEDWORD(ip.GetPort(), ip.GetPort()));
}
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