xbmc/network/EventPacket.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "EventPacket.h"
  10
  11 #include "Socket.h"
  12 #include "utils/log.h"
  13
  14 using namespace EVENTPACKET;
  15
  16 /************************************************************************/
  17 /* CEventPacket                                                         */
  18 /************************************************************************/
  19 bool CEventPacket::Parse(int datasize, const void *data)
  20 {
  21   unsigned char* buf = const_cast<unsigned char*>((const unsigned char *)data);
  22   if (datasize < HEADER_SIZE || datasize > PACKET_SIZE)
  23     return false;
  24
  25   // check signature
  26   if (memcmp(data, (const void*)HEADER_SIG, HEADER_SIG_LENGTH) != 0)
  27     return false;
  28
  29   buf += HEADER_SIG_LENGTH;
  30
  31   // extract protocol version
  32   m_cMajVer = (*buf++);
  33   m_cMinVer = (*buf++);
  34
  35   if (m_cMajVer != 2 && m_cMinVer != 0)
  36     return false;
  37
  38   // get packet type
  39   m_eType = (PacketType)ntohs(*((uint16_t*)buf));
  40
  41   if (m_eType < (unsigned short)PT_HELO || m_eType >= (unsigned short)PT_LAST)
  42     return false;
  43
  44   // get packet sequence id
  45   buf += 2;
  46   m_iSeq  = ntohl(*((uint32_t*)buf));
  47
  48   // get total message length
  49   buf += 4;
  50   m_iTotalPackets = ntohl(*((uint32_t*)buf));
  51
  52   // get payload size
  53   buf += 4;
  54   uint16_t payloadSize = ntohs(*(reinterpret_cast<uint16_t*>(buf)));
  55
  56   if ((payloadSize + HEADER_SIZE) != static_cast<uint16_t>(datasize))
  57     return false;
  58
  59   // get the client's token
  60   buf += 2;
  61   m_iClientToken = ntohl(*((uint32_t*)buf));
  62
  63   buf += 4;
  64
  65   // get payload
  66   if (payloadSize > 0)
  67   {
  68     // forward past reserved bytes
  69     buf += 10;
  70
  71     m_pPayload = std::vector<uint8_t>(buf, buf + payloadSize);
  72   }
  73   m_bValid = true;
  74   return true;
  75 }
  76
  77 void CEventPacket::SetPayload(std::vector<uint8_t> payload)
  78 {
  79   m_pPayload = std::move(payload);
  80 }