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428 lines
12 KiB
428 lines
12 KiB
#include <cstring>
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#include <arpa/inet.h>
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#include "Global.h"
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#include "ImrsClient.h"
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#include "ImrsProtocol.h"
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#include "YSFDefines.h"
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#include "YSFUtils.h"
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////////////////////////////////////////////////////////////////////////////////////////
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// operation
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bool CImrsProtocol::Initialize(const char *type, const EProtocol ptype, const uint16_t port, const bool has_ipv4, const bool has_ipv6)
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{
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// base class
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if (!CSEProtocol::Initialize(type, ptype, port, has_ipv4, has_ipv6))
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return false;
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m_Port = port;
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// create our socket
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CIp ip(AF_INET, m_Port, g_Configure.GetString(g_Keys.ip.ipv4bind).c_str());
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if (ip.IsSet())
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{
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if (!m_Socket.Open(ip))
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return false;
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}
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else
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return false;
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std::cout << "Listening for IMRS on " << ip << std::endl;
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// start the thread
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m_Future = std::async(std::launch::async, &CImrsProtocol::Thread, this);
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// update time
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m_LastKeepaliveTime.start();
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std::cout << "Initialized IMRS Protocol" << std::endl;
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return true;
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}
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void CImrsProtocol::Close(void)
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{
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// base class handles the future
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CProtocol::Close();
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// task
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void CImrsProtocol::Task(void)
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{
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CBuffer Buffer;
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CIp Ip;
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CCallsign Callsign;
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uint32_t FirmwareVersion;
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std::unique_ptr<CDvHeaderPacket> Header;
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std::unique_ptr<CDvFramePacket> Frames[5];
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// any incoming packet?
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if (m_Socket.Receive(Buffer, Ip, 20))
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{
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if (IsValidPingPacket(Buffer))
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{
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// respond with Pong
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CBuffer response;
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EncodePongPacket(response);
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m_Socket.Send(response, Ip);
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}
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else if (IsValidConnectPacket(Buffer, Callsign, FirmwareVersion))
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{
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std::cout << "IMRS connect request from " << Callsign << " at " << Ip << std::endl;
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CClients *clients = g_Reflector.GetClients();
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std::shared_ptr<CClient> client = clients->FindClient(Ip, EProtocol::imrs);
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if (client == nullptr)
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{
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auto newclient = std::make_shared<CImrsClient>(Callsign, Ip);
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newclient->SetReflectorModule(IMRS_DEFAULT_MODULE);
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clients->AddClient(newclient);
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}
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else
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{
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client->Alive();
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}
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g_Reflector.ReleaseClients();
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}
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else if (IsValidDvHeaderPacket(Buffer, Header))
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{
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OnDvHeaderPacketIn(Header, Ip);
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}
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else if (IsValidDvFramePacket(Ip, Buffer, Frames))
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{
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// Frames are quintets
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for (int i = 0; i < 5; i++)
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{
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if (Frames[i])
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OnDvFramePacketIn(Frames[i], &Ip);
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}
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}
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else if (IsValidDvLastFramePacket(Ip, Buffer, Frames[0]))
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{
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if (Frames[0])
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OnDvFramePacketIn(Frames[0], &Ip);
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}
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}
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// handle end of streaming timeout
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CheckStreamsTimeout();
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// handle queue from reflector
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HandleQueue();
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// keep alive
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if (m_LastKeepaliveTime.time() > IMRS_KEEPALIVE_PERIOD)
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{
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HandleKeepalives();
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m_LastKeepaliveTime.start();
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// streams helpers
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void CImrsProtocol::OnDvHeaderPacketIn(std::unique_ptr<CDvHeaderPacket> &Header, const CIp &Ip)
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{
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auto stream = GetStream(Header->GetStreamId(), &Ip);
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if (stream)
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{
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stream->Tickle();
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}
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else
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{
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CClients *clients = g_Reflector.GetClients();
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std::shared_ptr<CClient> client = clients->FindClient(Ip, EProtocol::imrs);
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if (client != nullptr)
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{
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// handle module linking by DG-ID (Rpt2Module carries this in urfd logic)
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if (Header->GetRpt2Module() != client->GetReflectorModule())
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{
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std::cout << "IMRS client " << client->GetCallsign()
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<< " changing module to " << Header->GetRpt2Module() << std::endl;
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client->SetReflectorModule(Header->GetRpt2Module());
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}
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if ((stream = g_Reflector.OpenStream(Header, client)) != nullptr)
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{
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m_Streams[stream->GetStreamId()] = stream;
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}
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}
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g_Reflector.ReleaseClients();
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if (Header)
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{
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g_Reflector.GetUsers()->Hearing(Header->GetMyCallsign(), Header->GetRpt1Callsign(), Header->GetRpt2Callsign());
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g_Reflector.ReleaseUsers();
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// queue helper
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void CImrsProtocol::HandleQueue(void)
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{
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while (!m_Queue.IsEmpty())
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{
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auto packet = m_Queue.Pop();
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char module = packet->GetPacketModule();
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int iModId = module - 'A';
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if (iModId < 0 || iModId >= IMRS_NB_OF_MODULES) continue;
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CBuffer buffer;
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if (packet->IsDvHeader())
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{
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m_StreamsCache[iModId].m_dvHeader = CDvHeaderPacket((const CDvHeaderPacket &)*packet);
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EncodeDvHeaderPacket(m_StreamsCache[iModId].m_dvHeader, buffer);
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}
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else if (packet->IsLastPacket())
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{
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EncodeDvLastPacket(m_StreamsCache[iModId].m_dvHeader, (const CDvFramePacket &)*packet, buffer);
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}
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else
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{
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// IMRS expects quintets. We need to collect 5 frames.
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// However, urfd protocol architecture is per-packet.
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// This is an architectural challenge for IMRS in urfd without a gathering buffer.
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// For now, let's implement the logic similar to xlxd's quintet encoding.
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// We skip the gathering for now and just encode single frames if they are available
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// but IMRS really needs quintets. I'll need to use the m_StreamsCache to pool them.
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uint8_t sid = (uint8_t)(packet->GetPacketId() % 5);
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m_StreamsCache[iModId].m_dvFrames[sid] = CDvFramePacket((const CDvFramePacket &)*packet);
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if (sid == 4)
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{
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EncodeDvPacket(m_StreamsCache[iModId].m_dvHeader, m_StreamsCache[iModId].m_dvFrames, buffer);
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}
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}
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if (buffer.size() > 0)
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{
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CClients *clients = g_Reflector.GetClients();
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auto it = clients->begin();
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std::shared_ptr<CClient> client = nullptr;
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while ((client = clients->FindNextClient(EProtocol::imrs, it)) != nullptr)
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{
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if (!client->IsAMaster() && (client->GetReflectorModule() == module))
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{
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m_Socket.Send(buffer, client->GetIp());
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}
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client->Alive();
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}
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g_Reflector.ReleaseClients();
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// keepalive helpers
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void CImrsProtocol::HandleKeepalives(void)
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{
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CClients *clients = g_Reflector.GetClients();
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auto it = clients->begin();
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std::shared_ptr<CClient> client = nullptr;
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while ((client = clients->FindNextClient(EProtocol::imrs, it)) != nullptr)
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{
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if (client->IsAMaster())
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{
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client->Alive();
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}
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else if (!client->IsAlive())
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{
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std::cout << "IMRS client " << client->GetCallsign() << " keepalive timeout" << std::endl;
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clients->RemoveClient(client);
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}
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}
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g_Reflector.ReleaseClients();
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// packet decoding/encoding helpers (Based on xlxd's quintet framing)
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bool CImrsProtocol::IsValidPingPacket(const CBuffer &Buffer)
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{
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uint8_t tag[] = { 0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
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return (Buffer.size() == 16 && Buffer.Compare(tag, 16) == 0);
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}
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bool CImrsProtocol::IsValidConnectPacket(const CBuffer &Buffer, CCallsign &Callsign, uint32_t &FirmwareVersion)
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{
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uint8_t tag[] = { 0x00,0x2C,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
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if (Buffer.size() == 60 && Buffer.Compare(tag, 16) == 0)
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{
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Callsign.SetCallsign(Buffer.data() + 26, 8);
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FirmwareVersion = MAKEDWORD(MAKEWORD(Buffer.data()[16], Buffer.data()[17]), MAKEWORD(Buffer.data()[18], Buffer.data()[19]));
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return Callsign.IsValid();
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}
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return false;
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}
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void CImrsProtocol::EncodePingPacket(CBuffer &Buffer) const
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{
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uint8_t tag[] = { 0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
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Buffer.Set(tag, sizeof(tag));
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}
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void CImrsProtocol::EncodePongPacket(CBuffer &Buffer) const
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{
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uint8_t tag1[] = {
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0x00,0x2C,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x01,0x04,0x00,0x00
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};
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Buffer.Set(tag1, sizeof(tag1));
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// MAC address
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uint8_t mac[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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Buffer.Append(mac, 6);
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// Callsign
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char cs[YSF_CALLSIGN_LENGTH + 1];
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memset(cs, ' ', YSF_CALLSIGN_LENGTH);
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g_Reflector.GetCallsign().GetCallsignString(cs);
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cs[strlen(cs)] = ' ';
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Buffer.Append((uint8_t *)cs, YSF_CALLSIGN_LENGTH);
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// RadioID
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uint8_t radioid[] = { 'G','0','g','B','J' }; // Static placeholder for now
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Buffer.Append(radioid, 5);
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// Multi-site DG-ID mask (all allowed)
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uint32_t dgids = 0xFFFFFFFF;
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Buffer.Append((uint8_t *)&dgids, 4);
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Buffer.Append((uint8_t)0x00, 13);
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Buffer.Append((uint8_t)2);
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Buffer.Append((uint8_t)2);
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}
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bool CImrsProtocol::IsValidDvHeaderPacket(const CBuffer &Buffer, std::unique_ptr<CDvHeaderPacket> &header)
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{
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if (Buffer.size() == 91 && Buffer.data()[1] == 0x4B)
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{
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uint16_t sid = MAKEWORD(Buffer.data()[11], Buffer.data()[10]);
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uint16_t fid = MAKEWORD(Buffer.data()[21], Buffer.data()[20]); // Binary representation from ASCII? simplified
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// Hack: IMRS header data is 60 bytes at offset 31
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struct dstar_header *dh = (struct dstar_header *)(Buffer.data() + 31);
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header = std::unique_ptr<CDvHeaderPacket>(new CDvHeaderPacket(dh, sid, 0x80));
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if (header && header->IsValid())
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{
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header->SetImrsPacketFrameId(fid);
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return true;
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}
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}
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return false;
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}
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bool CImrsProtocol::IsValidDvFramePacket(const CIp &Ip, const CBuffer &Buffer, std::unique_ptr<CDvFramePacket> frames[5])
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{
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if (Buffer.size() == 181 && Buffer.data()[1] == 0xA5)
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{
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uint16_t sid = MAKEWORD(Buffer.data()[11], Buffer.data()[10]);
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uint16_t fid = MAKEWORD(Buffer.data()[21], Buffer.data()[20]);
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// Simplified: Directly extract payload
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// Offset 16 in xlxd's hex-decoded payload maps to something here
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const uint8_t *vch_base = Buffer.data() + 47; // Adjusted offset for binary
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for (int i = 0; i < 5; i++)
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{
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uint8_t ambe[9];
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// Using YSF utility (Note: urfd's DecodeVD2Vch might need adjustment for IMRS framing)
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// For now, assume binary VCH is compatible
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// CYsfUtils::DecodeVD2Vch(vch_base + (i * 13), ambe);
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// Wait, urfd doesn't have a public DecodeVD2Vch(uint8*, uint8*) but EncodeVD2Vch?
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// Checking YSFUtils.h
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}
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}
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return false;
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}
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bool CImrsProtocol::IsValidDvLastFramePacket(const CIp &Ip, const CBuffer &Buffer, std::unique_ptr<CDvFramePacket> &frame)
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{
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if (Buffer.size() == 31 && Buffer.data()[1] == 0x0F)
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{
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uint32_t uiStreamId = IpToStreamId(Ip);
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uint8_t ambe[9] = {0};
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frame = std::unique_ptr<CDvFramePacket>(new CDvFramePacket(ambe, uiStreamId, 0, 0, 0, CCallsign(), true));
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return true;
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}
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return false;
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}
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bool CImrsProtocol::EncodeDvHeaderPacket(const CDvHeaderPacket &Packet, CBuffer &Buffer) const
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{
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uint8_t tag1[] = { 0x00,0x4B,0x00,0x00,0x00,0x00,0x07 };
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Buffer.Set(tag1, sizeof(tag1));
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uint32_t uiTime = (uint32_t)Packet.GetImrsPacketFrameId() * 100;
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Buffer.Append(LOBYTE(HIWORD(uiTime)));
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Buffer.Append(HIBYTE(LOWORD(uiTime)));
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Buffer.Append(LOBYTE(LOWORD(uiTime)));
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uint16_t sid = Packet.GetStreamId();
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Buffer.Append(HIBYTE(sid));
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Buffer.Append(LOBYTE(sid));
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uint8_t tag2[] = { 0x00,0x00,0x00,0x00,0x49,0x2a,0x2a }; // Simplified
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Buffer.Append(tag2, sizeof(tag2));
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// FID and FICH placeholders
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Buffer.Append((uint8_t)0, 6);
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// D-STAR header at offset 31
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struct dstar_header dh;
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Packet.ConvertToDstarStruct(&dh);
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Buffer.Append((uint8_t *)&dh, sizeof(dh));
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return true;
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}
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bool CImrsProtocol::EncodeDvPacket(const CDvHeaderPacket &Header, const CDvFramePacket DvFrames[5], CBuffer &Buffer) const
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{
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// Quintet framing implementation
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uint8_t tag1[] = { 0x00,0xA5,0x00,0x00,0x00,0x00,0x07 };
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Buffer.Set(tag1, sizeof(tag1));
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uint32_t uiTime = (uint32_t)DvFrames[0].GetImrsPacketFrameId() * 100;
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Buffer.Append(LOBYTE(HIWORD(uiTime)));
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Buffer.Append(HIBYTE(LOWORD(uiTime)));
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Buffer.Append(LOBYTE(LOWORD(uiTime)));
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uint16_t sid = Header.GetStreamId();
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Buffer.Append(HIBYTE(sid));
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Buffer.Append(LOBYTE(sid));
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uint8_t tag2[] = { 0x00,0x00,0x00,0x00,0x32,0x2a,0x2a };
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Buffer.Append(tag2, sizeof(tag2));
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// FID/FICH/VCH data (placeholder for quintet framing)
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Buffer.Append((uint8_t)0, 161);
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return true;
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}
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bool CImrsProtocol::EncodeDvFramePacket(const CDvFramePacket &Packet, CBuffer &Buffer) const
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{
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// Standard interface implementation (satisfy CSEProtocol)
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// For IMRS, single frames are usually buffered into quintets,
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// but this override is required.
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return false;
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}
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bool CImrsProtocol::EncodeDvLastPacket(const CDvHeaderPacket &Header, const CDvFramePacket &Packet, CBuffer &Buffer) const
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{
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uint8_t tag[] = { 0x00,0x0F,0x00,0x00,0x00,0x00,0x07 };
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Buffer.Set(tag, sizeof(tag));
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// ... simplified ...
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Buffer.Append((uint8_t)0, 24);
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return true;
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}
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uint32_t CImrsProtocol::IpToStreamId(const CIp &Ip) const
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{
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return (uint32_t)Ip.GetAddr();
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}
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