diff options
Diffstat (limited to 'src/engine/e_network.cpp')
| -rw-r--r-- | src/engine/e_network.cpp | 347 |
1 files changed, 0 insertions, 347 deletions
diff --git a/src/engine/e_network.cpp b/src/engine/e_network.cpp deleted file mode 100644 index ac753e50..00000000 --- a/src/engine/e_network.cpp +++ /dev/null @@ -1,347 +0,0 @@ -/* copyright (c) 2007 magnus auvinen, see licence.txt for more info */ -#include <base/system.h> - -#include <string.h> /* strlen */ - -#include "e_config.h" -#include "e_engine.h" -#include "e_network.h" -#include "e_huffman.h" - -void CNetRecvUnpacker::Clear() -{ - m_Valid = false; -} - -void CNetRecvUnpacker::Start(const NETADDR *pAddr, CNetConnection *pConnection, int ClientID) -{ - m_Addr = *pAddr; - m_pConnection = pConnection; - m_ClientID = ClientID; - m_CurrentChunk = 0; - m_Valid = true; -} - -/* TODO: rename this function */ -int CNetRecvUnpacker::FetchChunk(CNetChunk *pChunk) -{ - CNetChunkHeader Header; - unsigned char *pEnd = m_Data.m_aChunkData + m_Data.m_DataSize; - - while(1) - { - unsigned char *pData = m_Data.m_aChunkData; - - /* check for old data to unpack */ - if(!m_Valid || m_CurrentChunk >= m_Data.m_NumChunks) - { - Clear(); - return 0; - } - - /* TODO: add checking here so we don't read too far */ - for(int i = 0; i < m_CurrentChunk; i++) - { - pData = Header.Unpack(pData); - pData += Header.m_Size; - } - - /* unpack the header */ - pData = Header.Unpack(pData); - m_CurrentChunk++; - - if(pData+Header.m_Size > pEnd) - { - Clear(); - return 0; - } - - /* handle sequence stuff */ - if(m_pConnection && (Header.m_Flags&NET_CHUNKFLAG_VITAL)) - { - if(Header.m_Sequence == (m_pConnection->m_Ack+1)%NET_MAX_SEQUENCE) - { - /* in sequence */ - m_pConnection->m_Ack = (m_pConnection->m_Ack+1)%NET_MAX_SEQUENCE; - } - else - { - /* old packet that we already got */ - if(CNetBase::IsSeqInBackroom(Header.m_Sequence, m_pConnection->m_Ack)) - continue; - - /* out of sequence, request resend */ - if(config.debug) - dbg_msg("conn", "asking for resend %d %d", Header.m_Sequence, (m_pConnection->m_Ack+1)%NET_MAX_SEQUENCE); - m_pConnection->SignalResend(); - continue; /* take the next chunk in the packet */ - } - } - - /* fill in the info */ - pChunk->m_ClientID = m_ClientID; - pChunk->m_Address = m_Addr; - pChunk->m_Flags = 0; - pChunk->m_DataSize = Header.m_Size; - pChunk->m_pData = pData; - return 1; - } -} - -/* packs the data tight and sends it */ -void CNetBase::SendPacketConnless(NETSOCKET Socket, NETADDR *pAddr, const void *pData, int DataSize) -{ - unsigned char aBuffer[NET_MAX_PACKETSIZE]; - aBuffer[0] = 0xff; - aBuffer[1] = 0xff; - aBuffer[2] = 0xff; - aBuffer[3] = 0xff; - aBuffer[4] = 0xff; - aBuffer[5] = 0xff; - mem_copy(&aBuffer[6], pData, DataSize); - net_udp_send(Socket, pAddr, aBuffer, 6+DataSize); -} - -void CNetBase::SendPacket(NETSOCKET Socket, NETADDR *pAddr, CNetPacketConstruct *pPacket) -{ - unsigned char aBuffer[NET_MAX_PACKETSIZE]; - int CompressedSize = -1; - int FinalSize = -1; - - /* log the data */ - if(ms_DataLogSent) - { - int type = 1; - io_write(ms_DataLogSent, &type, sizeof(type)); - io_write(ms_DataLogSent, &pPacket->m_DataSize, sizeof(pPacket->m_DataSize)); - io_write(ms_DataLogSent, &pPacket->m_aChunkData, pPacket->m_DataSize); - io_flush(ms_DataLogSent); - } - - /* compress */ - CompressedSize = huffman_compress(&ms_HuffmanState, pPacket->m_aChunkData, pPacket->m_DataSize, &aBuffer[3], NET_MAX_PACKETSIZE-4); - - /* check if the compression was enabled, successful and good enough */ - if(CompressedSize > 0 && CompressedSize < pPacket->m_DataSize) - { - FinalSize = CompressedSize; - pPacket->m_Flags |= NET_PACKETFLAG_COMPRESSION; - } - else - { - /* use uncompressed data */ - FinalSize = pPacket->m_DataSize; - mem_copy(&aBuffer[3], pPacket->m_aChunkData, pPacket->m_DataSize); - pPacket->m_Flags &= ~NET_PACKETFLAG_COMPRESSION; - } - - /* set header and send the packet if all things are good */ - if(FinalSize >= 0) - { - FinalSize += NET_PACKETHEADERSIZE; - aBuffer[0] = ((pPacket->m_Flags<<4)&0xf0)|((pPacket->m_Ack>>8)&0xf); - aBuffer[1] = pPacket->m_Ack&0xff; - aBuffer[2] = pPacket->m_NumChunks; - net_udp_send(Socket, pAddr, aBuffer, FinalSize); - - /* log raw socket data */ - if(ms_DataLogSent) - { - int type = 0; - io_write(ms_DataLogSent, &type, sizeof(type)); - io_write(ms_DataLogSent, &FinalSize, sizeof(FinalSize)); - io_write(ms_DataLogSent, aBuffer, FinalSize); - io_flush(ms_DataLogSent); - } - } -} - -/* TODO: rename this function */ -int CNetBase::UnpackPacket(unsigned char *pBuffer, int Size, CNetPacketConstruct *pPacket) -{ - /* check the size */ - if(Size < NET_PACKETHEADERSIZE || Size > NET_MAX_PACKETSIZE) - { - dbg_msg("", "packet too small, %d", Size); - return -1; - } - - /* log the data */ - if(ms_DataLogRecv) - { - int type = 0; - io_write(ms_DataLogRecv, &type, sizeof(type)); - io_write(ms_DataLogRecv, &Size, sizeof(Size)); - io_write(ms_DataLogRecv, pBuffer, Size); - io_flush(ms_DataLogRecv); - } - - /* read the packet */ - pPacket->m_Flags = pBuffer[0]>>4; - pPacket->m_Ack = ((pBuffer[0]&0xf)<<8) | pBuffer[1]; - pPacket->m_NumChunks = pBuffer[2]; - pPacket->m_DataSize = Size - NET_PACKETHEADERSIZE; - - if(pPacket->m_Flags&NET_PACKETFLAG_CONNLESS) - { - if(Size < 6) - { - dbg_msg("", "connection less packet too small, %d", Size); - return -1; - } - - pPacket->m_Flags = NET_PACKETFLAG_CONNLESS; - pPacket->m_Ack = 0; - pPacket->m_NumChunks = 0; - pPacket->m_DataSize = Size - 6; - mem_copy(pPacket->m_aChunkData, &pBuffer[6], pPacket->m_DataSize); - } - else - { - if(pPacket->m_Flags&NET_PACKETFLAG_COMPRESSION) - pPacket->m_DataSize = huffman_decompress(&ms_HuffmanState, &pBuffer[3], pPacket->m_DataSize, pPacket->m_aChunkData, sizeof(pPacket->m_aChunkData)); - else - mem_copy(pPacket->m_aChunkData, &pBuffer[3], pPacket->m_DataSize); - } - - /* check for errors */ - if(pPacket->m_DataSize < 0) - { - if(config.debug) - dbg_msg("network", "error during packet decoding"); - return -1; - } - - /* log the data */ - if(ms_DataLogRecv) - { - int type = 1; - io_write(ms_DataLogRecv, &type, sizeof(type)); - io_write(ms_DataLogRecv, &pPacket->m_DataSize, sizeof(pPacket->m_DataSize)); - io_write(ms_DataLogRecv, pPacket->m_aChunkData, pPacket->m_DataSize); - io_flush(ms_DataLogRecv); - } - - /* return success */ - return 0; -} - - -void CNetBase::SendControlMsg(NETSOCKET Socket, NETADDR *pAddr, int Ack, int ControlMsg, const void *pExtra, int ExtraSize) -{ - CNetPacketConstruct Construct; - Construct.m_Flags = NET_PACKETFLAG_CONTROL; - Construct.m_Ack = Ack; - Construct.m_NumChunks = 0; - Construct.m_DataSize = 1+ExtraSize; - Construct.m_aChunkData[0] = ControlMsg; - mem_copy(&Construct.m_aChunkData[1], pExtra, ExtraSize); - - /* send the control message */ - CNetBase::SendPacket(Socket, pAddr, &Construct); -} - - - -unsigned char *CNetChunkHeader::Pack(unsigned char *pData) -{ - pData[0] = ((m_Flags&3)<<6)|((m_Size>>4)&0x3f); - pData[1] = (m_Size&0xf); - if(m_Flags&NET_CHUNKFLAG_VITAL) - { - pData[1] |= (m_Sequence>>2)&0xf0; - pData[2] = m_Sequence&0xff; - return pData + 3; - } - return pData + 2; -} - -unsigned char *CNetChunkHeader::Unpack(unsigned char *pData) -{ - m_Flags = (pData[0]>>6)&3; - m_Size = ((pData[0]&0x3f)<<4) | (pData[1]&0xf); - m_Sequence = -1; - if(m_Flags&NET_CHUNKFLAG_VITAL) - { - m_Sequence = ((pData[1]&0xf0)<<2) | pData[2]; - return pData + 3; - } - return pData + 2; -} - - -int CNetBase::IsSeqInBackroom(int Seq, int Ack) -{ - int Bottom = (Ack-NET_MAX_SEQUENCE/2); - if(Bottom < 0) - { - if(Seq <= Ack) - return 1; - if(Seq >= (Bottom + NET_MAX_SEQUENCE)) - return 1; - } - else - { - if(Seq <= Ack && Seq >= Bottom) - return 1; - } - - return 0; -} - -IOHANDLE CNetBase::ms_DataLogSent = 0; -IOHANDLE CNetBase::ms_DataLogRecv = 0; -HUFFMAN_STATE CNetBase::ms_HuffmanState; - - -void CNetBase::OpenLog(const char *pSentLog, const char *pRecvLog) -{ - if(pSentLog) - { - ms_DataLogSent = engine_openfile(pSentLog, IOFLAG_WRITE); - if(ms_DataLogSent) - dbg_msg("network", "logging sent packages to '%s'", pSentLog); - else - dbg_msg("network", "failed to open for logging '%s'", pSentLog); - } - - if(pRecvLog) - { - ms_DataLogRecv = engine_openfile(pRecvLog, IOFLAG_WRITE); - if(ms_DataLogRecv) - dbg_msg("network", "logging recv packages to '%s'", pRecvLog); - else - dbg_msg("network", "failed to open for logging '%s'", pRecvLog); - } -} - -int CNetBase::Compress(const void *pData, int DataSize, void *pOutput, int OutputSize) -{ - return huffman_compress(&ms_HuffmanState, pData, DataSize, pOutput, OutputSize); -} - -int CNetBase::Decompress(const void *pData, int DataSize, void *pOutput, int OutputSize) -{ - return huffman_decompress(&ms_HuffmanState, pData, DataSize, pOutput, OutputSize); -} - - -static const unsigned gs_aFreqTable[256+1] = { - 1<<30,4545,2657,431,1950,919,444,482,2244,617,838,542,715,1814,304,240,754,212,647,186, - 283,131,146,166,543,164,167,136,179,859,363,113,157,154,204,108,137,180,202,176, - 872,404,168,134,151,111,113,109,120,126,129,100,41,20,16,22,18,18,17,19, - 16,37,13,21,362,166,99,78,95,88,81,70,83,284,91,187,77,68,52,68, - 59,66,61,638,71,157,50,46,69,43,11,24,13,19,10,12,12,20,14,9, - 20,20,10,10,15,15,12,12,7,19,15,14,13,18,35,19,17,14,8,5, - 15,17,9,15,14,18,8,10,2173,134,157,68,188,60,170,60,194,62,175,71, - 148,67,167,78,211,67,156,69,1674,90,174,53,147,89,181,51,174,63,163,80, - 167,94,128,122,223,153,218,77,200,110,190,73,174,69,145,66,277,143,141,60, - 136,53,180,57,142,57,158,61,166,112,152,92,26,22,21,28,20,26,30,21, - 32,27,20,17,23,21,30,22,22,21,27,25,17,27,23,18,39,26,15,21, - 12,18,18,27,20,18,15,19,11,17,33,12,18,15,19,18,16,26,17,18, - 9,10,25,22,22,17,20,16,6,16,15,20,14,18,24,335,1517}; - -void CNetBase::Init() -{ - huffman_init(&ms_HuffmanState, gs_aFreqTable); -} |