text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2015 The Bitcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "protocol.h"
  
  #include "util.h"
  #include "utilstrencodings.h"
  
  #ifndef WIN32
  # include <arpa/inet.h>
  #endif
  
  namespace NetMsgType {
  const char *VERSION="version";
  const char *VERACK="verack";
  const char *ADDR="addr";
  const char *INV="inv";
  const char *GETDATA="getdata";
  const char *MERKLEBLOCK="merkleblock";
  const char *GETBLOCKS="getblocks";
  const char *GETHEADERS="getheaders";
  const char *TX="tx";
  const char *HEADERS="headers";
  const char *BLOCK="block";
  const char *GETADDR="getaddr";
  const char *MEMPOOL="mempool";
  const char *PING="ping";
  const char *PONG="pong";
  const char *ALERT="alert";
  const char *NOTFOUND="notfound";
  const char *FILTERLOAD="filterload";
  const char *FILTERADD="filteradd";
  const char *FILTERCLEAR="filterclear";
  const char *REJECT="reject";
  const char *SENDHEADERS="sendheaders";
  // Onex message types
  const char *TXLOCKREQUEST="ix";
  const char *TXLOCKVOTE="txlvote";
  const char *SPORK="spork";
  const char *GETSPORKS="getsporks";
  const char *MASTERNODEPAYMENTVOTE="mnw";
  const char *MASTERNODEPAYMENTBLOCK="mnwb";
  const char *MASTERNODEPAYMENTSYNC="mnget";
  const char *MNBUDGETSYNC="mnvs"; // depreciated since 12.1
  const char *MNBUDGETVOTE="mvote"; // depreciated since 12.1
  const char *MNBUDGETPROPOSAL="mprop"; // depreciated since 12.1
  const char *MNBUDGETFINAL="fbs"; // depreciated since 12.1
  const char *MNBUDGETFINALVOTE="fbvote"; // depreciated since 12.1
  const char *MNQUORUM="mn quorum"; // not implemented
  const char *MNANNOUNCE="mnb";
  const char *MNPING="mnp";
  const char *DSACCEPT="dsa";
  const char *DSVIN="dsi";
  const char *DSFINALTX="dsf";
  const char *DSSIGNFINALTX="dss";
  const char *DSCOMPLETE="dsc";
  const char *DSSTATUSUPDATE="dssu";
  const char *DSTX="dstx";
  const char *DSQUEUE="dsq";
  const char *DSEG="dseg";
  const char *SYNCSTATUSCOUNT="ssc";
  const char *MNGOVERNANCESYNC="govsync";
  const char *MNGOVERNANCEOBJECT="govobj";
  const char *MNGOVERNANCEOBJECTVOTE="govobjvote";
  const char *MNVERIFY="mnv";
  };
  
  static const char* ppszTypeName[] =
  {
      "ERROR", // Should never occur
      NetMsgType::TX,
      NetMsgType::BLOCK,
      "filtered block", // Should never occur
      // Onex message types
      // NOTE: include non-implmented here, we must keep this list in sync with enum in protocol.h
      NetMsgType::TXLOCKREQUEST,
      NetMsgType::TXLOCKVOTE,
      NetMsgType::SPORK,
      NetMsgType::MASTERNODEPAYMENTVOTE,
      NetMsgType::MASTERNODEPAYMENTBLOCK, // reusing, was MNSCANERROR previousely, was NOT used in 12.0, we need this for inv
      NetMsgType::MNBUDGETVOTE, // depreciated since 12.1
      NetMsgType::MNBUDGETPROPOSAL, // depreciated since 12.1
      NetMsgType::MNBUDGETFINAL, // depreciated since 12.1
      NetMsgType::MNBUDGETFINALVOTE, // depreciated since 12.1
      NetMsgType::MNQUORUM, // not implemented
      NetMsgType::MNANNOUNCE,
      NetMsgType::MNPING,
      NetMsgType::DSTX,
      NetMsgType::MNGOVERNANCEOBJECT,
      NetMsgType::MNGOVERNANCEOBJECTVOTE,
      NetMsgType::MNVERIFY,
  };
  
  /** All known message types. Keep this in the same order as the list of
   * messages above and in protocol.h.
   */
  const static std::string allNetMessageTypes[] = {
      NetMsgType::VERSION,
      NetMsgType::VERACK,
      NetMsgType::ADDR,
      NetMsgType::INV,
      NetMsgType::GETDATA,
      NetMsgType::MERKLEBLOCK,
      NetMsgType::GETBLOCKS,
      NetMsgType::GETHEADERS,
      NetMsgType::TX,
      NetMsgType::HEADERS,
      NetMsgType::BLOCK,
      NetMsgType::GETADDR,
      NetMsgType::MEMPOOL,
      NetMsgType::PING,
      NetMsgType::PONG,
      NetMsgType::ALERT,
      NetMsgType::NOTFOUND,
      NetMsgType::FILTERLOAD,
      NetMsgType::FILTERADD,
      NetMsgType::FILTERCLEAR,
      NetMsgType::REJECT,
      NetMsgType::SENDHEADERS,
      // Onex message types
      // NOTE: do NOT include non-implmented here, we want them to be "Unknown command" in ProcessMessage()
      NetMsgType::TXLOCKREQUEST,
      NetMsgType::TXLOCKVOTE,
      NetMsgType::SPORK,
      NetMsgType::GETSPORKS,
      NetMsgType::MASTERNODEPAYMENTVOTE,
      // NetMsgType::MASTERNODEPAYMENTBLOCK, // there is no message for this, only inventory
      NetMsgType::MASTERNODEPAYMENTSYNC,
      NetMsgType::MNANNOUNCE,
      NetMsgType::MNPING,
      NetMsgType::DSACCEPT,
      NetMsgType::DSVIN,
      NetMsgType::DSFINALTX,
      NetMsgType::DSSIGNFINALTX,
      NetMsgType::DSCOMPLETE,
      NetMsgType::DSSTATUSUPDATE,
      NetMsgType::DSTX,
      NetMsgType::DSQUEUE,
      NetMsgType::DSEG,
      NetMsgType::SYNCSTATUSCOUNT,
      NetMsgType::MNGOVERNANCESYNC,
      NetMsgType::MNGOVERNANCEOBJECT,
      NetMsgType::MNGOVERNANCEOBJECTVOTE,
      NetMsgType::MNVERIFY,
  };
  const static std::vector<std::string> allNetMessageTypesVec(allNetMessageTypes, allNetMessageTypes+ARRAYLEN(allNetMessageTypes));
  
  CMessageHeader::CMessageHeader(const MessageStartChars& pchMessageStartIn)
  {
      memcpy(pchMessageStart, pchMessageStartIn, MESSAGE_START_SIZE);
      memset(pchCommand, 0, sizeof(pchCommand));
      nMessageSize = -1;
      nChecksum = 0;
  }
  
  CMessageHeader::CMessageHeader(const MessageStartChars& pchMessageStartIn, const char* pszCommand, unsigned int nMessageSizeIn)
  {
      memcpy(pchMessageStart, pchMessageStartIn, MESSAGE_START_SIZE);
      memset(pchCommand, 0, sizeof(pchCommand));
      strncpy(pchCommand, pszCommand, COMMAND_SIZE);
      nMessageSize = nMessageSizeIn;
      nChecksum = 0;
  }
  
  std::string CMessageHeader::GetCommand() const
  {
      return std::string(pchCommand, pchCommand + strnlen(pchCommand, COMMAND_SIZE));
  }
  
  bool CMessageHeader::IsValid(const MessageStartChars& pchMessageStartIn) const
  {
      // Check start string
      if (memcmp(pchMessageStart, pchMessageStartIn, MESSAGE_START_SIZE) != 0)
          return false;
  
      // Check the command string for errors
      for (const char* p1 = pchCommand; p1 < pchCommand + COMMAND_SIZE; p1++)
      {
          if (*p1 == 0)
          {
              // Must be all zeros after the first zero
              for (; p1 < pchCommand + COMMAND_SIZE; p1++)
                  if (*p1 != 0)
                      return false;
          }
          else if (*p1 < ' ' || *p1 > 0x7E)
              return false;
      }
  
      // Message size
      if (nMessageSize > MAX_SIZE)
      {
          LogPrintf("CMessageHeader::IsValid(): (%s, %u bytes) nMessageSize > MAX_SIZE\n", GetCommand(), nMessageSize);
          return false;
      }
  
      return true;
  }
  
  
  
  CAddress::CAddress() : CService()
  {
      Init();
  }
  
  CAddress::CAddress(CService ipIn, uint64_t nServicesIn) : CService(ipIn)
  {
      Init();
      nServices = nServicesIn;
  }
  
  void CAddress::Init()
  {
      nServices = NODE_NETWORK;
      nTime = 100000000;
  }
  
  CInv::CInv()
  {
      type = 0;
      hash.SetNull();
  }
  
  CInv::CInv(int typeIn, const uint256& hashIn)
  {
      type = typeIn;
      hash = hashIn;
  }
  
  CInv::CInv(const std::string& strType, const uint256& hashIn)
  {
      unsigned int i;
      for (i = 1; i < ARRAYLEN(ppszTypeName); i++)
      {
          if (strType == ppszTypeName[i])
          {
              type = i;
              break;
          }
      }
      if (i == ARRAYLEN(ppszTypeName))
          throw std::out_of_range(strprintf("CInv::CInv(string, uint256): unknown type '%s'", strType));
      hash = hashIn;
  }
  
  bool operator<(const CInv& a, const CInv& b)
  {
      return (a.type < b.type || (a.type == b.type && a.hash < b.hash));
  }
  
  bool CInv::IsKnownType() const
  {
      return (type >= 1 && type < (int)ARRAYLEN(ppszTypeName));
  }
  
  const char* CInv::GetCommand() const
  {
      if (!IsKnownType())
          throw std::out_of_range(strprintf("CInv::GetCommand(): type=%d unknown type", type));
      return ppszTypeName[type];
  }
  
  std::string CInv::ToString() const
  {
      return strprintf("%s %s", GetCommand(), hash.ToString());
  }
  
  const std::vector<std::string> &getAllNetMessageTypes()
  {
      return allNetMessageTypesVec;
  }
  