src/protocol.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2012 The Bitcoin developers
   3 // Distributed under the MIT/X11 software license, see the accompanying
   4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #ifndef __cplusplus
   7 # error This header can only be compiled as C++.
   8 #endif
   9
  10 #ifndef __INCLUDED_PROTOCOL_H__
  11 #define __INCLUDED_PROTOCOL_H__
  12
  13 #include "serialize.h"
  14 #include "netbase.h"
  15 #include "util.h"
  16 #include <string>
  17 #include "uint256.h"
  18
  19 extern bool fTestNet;
  20 static inline unsigned short GetDefaultPort(const bool testnet = fTestNet)
  21 {
  22     return testnet ? 18333 : 8333;
  23 }
  24
  25 //
  26 // Message header
  27 //  (4) message start
  28 //  (12) command
  29 //  (4) size
  30 //  (4) checksum
  31
  32 extern unsigned char pchMessageStart[4];
  33
  34 class CMessageHeader
  35 {
  36     public:
  37         CMessageHeader();
  38         CMessageHeader(const char* pszCommand, unsigned int nMessageSizeIn);
  39
  40         std::string GetCommand() const;
  41         bool IsValid() const;
  42
  43         IMPLEMENT_SERIALIZE
  44             (
  45              READWRITE(FLATDATA(pchMessageStart));
  46              READWRITE(FLATDATA(pchCommand));
  47              READWRITE(nMessageSize);
  48              READWRITE(nChecksum);
  49             )
  50
  51     // TODO: make private (improves encapsulation)
  52     public:
  53         enum { COMMAND_SIZE=12 };
  54         char pchMessageStart[sizeof(::pchMessageStart)];
  55         char pchCommand[COMMAND_SIZE];
  56         unsigned int nMessageSize;
  57         unsigned int nChecksum;
  58 };
  59
  60 enum
  61 {
  62     NODE_NETWORK = (1 << 0),
  63 };
  64
  65 class CAddress : public CService
  66 {
  67     public:
  68         CAddress();
  69         explicit CAddress(CService ipIn, uint64 nServicesIn=NODE_NETWORK);
  70
  71         void Init();
  72
  73         IMPLEMENT_SERIALIZE
  74             (
  75              CAddress* pthis = const_cast<CAddress*>(this);
  76              CService* pip = (CService*)pthis;
  77              if (fRead)
  78                  pthis->Init();
  79              if (nType & SER_DISK)
  80              READWRITE(nVersion);
  81              if ((nType & SER_DISK) || (nVersion >= 31402 && !(nType & SER_GETHASH)))
  82              READWRITE(nTime);
  83              READWRITE(nServices);
  84              READWRITE(*pip);
  85             )
  86
  87         void print() const;
  88
  89     // TODO: make private (improves encapsulation)
  90     public:
  91         uint64 nServices;
  92
  93         // disk and network only
  94         unsigned int nTime;
  95
  96         // memory only
  97         int64 nLastTry;
  98 };
  99
 100 class CInv
 101 {
 102     public:
 103         CInv();
 104         CInv(int typeIn, const uint256& hashIn);
 105         CInv(const std::string& strType, const uint256& hashIn);
 106
 107         IMPLEMENT_SERIALIZE
 108         (
 109             READWRITE(type);
 110             READWRITE(hash);
 111         )
 112
 113         friend bool operator<(const CInv& a, const CInv& b);
 114
 115         bool IsKnownType() const;
 116         const char* GetCommand() const;
 117         std::string ToString() const;
 118         void print() const;
 119
 120     // TODO: make private (improves encapsulation)
 121     public:
 122         int type;
 123         uint256 hash;
 124 };
 125
 126 #endif // __INCLUDED_PROTOCOL_H__