313 lines
7.9 KiB
C++
313 lines
7.9 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
|
|
// Copyright (c) 2011 The Bitcoin developers
|
|
// Distributed under the MIT/X11 software license, see the accompanying
|
|
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#include "protocol.h"
|
|
#include "util.h"
|
|
|
|
#ifndef WIN32
|
|
# include <arpa/inet.h>
|
|
#endif
|
|
|
|
// Prototypes from net.h, but that header (currently) stinks, can't #include it without breaking things
|
|
bool Lookup(const char *pszName, std::vector<CAddress>& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup = false, int portDefault = 0, bool fAllowPort = false);
|
|
bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup = false, int portDefault = 0, bool fAllowPort = false);
|
|
|
|
static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
|
|
static const char* ppszTypeName[] =
|
|
{
|
|
"ERROR",
|
|
"tx",
|
|
"block",
|
|
};
|
|
|
|
CMessageHeader::CMessageHeader()
|
|
{
|
|
memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart));
|
|
memset(pchCommand, 0, sizeof(pchCommand));
|
|
pchCommand[1] = 1;
|
|
nMessageSize = -1;
|
|
nChecksum = 0;
|
|
}
|
|
|
|
CMessageHeader::CMessageHeader(const char* pszCommand, unsigned int nMessageSizeIn)
|
|
{
|
|
memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart));
|
|
strncpy(pchCommand, pszCommand, COMMAND_SIZE);
|
|
nMessageSize = nMessageSizeIn;
|
|
nChecksum = 0;
|
|
}
|
|
|
|
std::string CMessageHeader::GetCommand() const
|
|
{
|
|
if (pchCommand[COMMAND_SIZE-1] == 0)
|
|
return std::string(pchCommand, pchCommand + strlen(pchCommand));
|
|
else
|
|
return std::string(pchCommand, pchCommand + COMMAND_SIZE);
|
|
}
|
|
|
|
bool CMessageHeader::IsValid() const
|
|
{
|
|
// Check start string
|
|
if (memcmp(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart)) != 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)
|
|
{
|
|
printf("CMessageHeader::IsValid() : (%s, %u bytes) nMessageSize > MAX_SIZE\n", GetCommand().c_str(), nMessageSize);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
CAddress::CAddress()
|
|
{
|
|
Init();
|
|
}
|
|
|
|
CAddress::CAddress(unsigned int ipIn, unsigned short portIn, uint64 nServicesIn)
|
|
{
|
|
Init();
|
|
ip = ipIn;
|
|
port = htons(portIn == 0 ? GetDefaultPort() : portIn);
|
|
nServices = nServicesIn;
|
|
}
|
|
|
|
CAddress::CAddress(const struct sockaddr_in& sockaddr, uint64 nServicesIn)
|
|
{
|
|
Init();
|
|
ip = sockaddr.sin_addr.s_addr;
|
|
port = sockaddr.sin_port;
|
|
nServices = nServicesIn;
|
|
}
|
|
|
|
CAddress::CAddress(const char* pszIn, int portIn, bool fNameLookup, uint64 nServicesIn)
|
|
{
|
|
Init();
|
|
Lookup(pszIn, *this, nServicesIn, fNameLookup, portIn);
|
|
}
|
|
|
|
CAddress::CAddress(const char* pszIn, bool fNameLookup, uint64 nServicesIn)
|
|
{
|
|
Init();
|
|
Lookup(pszIn, *this, nServicesIn, fNameLookup, 0, true);
|
|
}
|
|
|
|
CAddress::CAddress(std::string strIn, int portIn, bool fNameLookup, uint64 nServicesIn)
|
|
{
|
|
Init();
|
|
Lookup(strIn.c_str(), *this, nServicesIn, fNameLookup, portIn);
|
|
}
|
|
|
|
CAddress::CAddress(std::string strIn, bool fNameLookup, uint64 nServicesIn)
|
|
{
|
|
Init();
|
|
Lookup(strIn.c_str(), *this, nServicesIn, fNameLookup, 0, true);
|
|
}
|
|
|
|
void CAddress::Init()
|
|
{
|
|
nServices = NODE_NETWORK;
|
|
memcpy(pchReserved, pchIPv4, sizeof(pchReserved));
|
|
ip = INADDR_NONE;
|
|
port = htons(GetDefaultPort());
|
|
nTime = 100000000;
|
|
nLastTry = 0;
|
|
}
|
|
|
|
bool operator==(const CAddress& a, const CAddress& b)
|
|
{
|
|
return (memcmp(a.pchReserved, b.pchReserved, sizeof(a.pchReserved)) == 0 &&
|
|
a.ip == b.ip &&
|
|
a.port == b.port);
|
|
}
|
|
|
|
bool operator!=(const CAddress& a, const CAddress& b)
|
|
{
|
|
return (!(a == b));
|
|
}
|
|
|
|
bool operator<(const CAddress& a, const CAddress& b)
|
|
{
|
|
int ret = memcmp(a.pchReserved, b.pchReserved, sizeof(a.pchReserved));
|
|
if (ret < 0)
|
|
return true;
|
|
else if (ret == 0)
|
|
{
|
|
if (ntohl(a.ip) < ntohl(b.ip))
|
|
return true;
|
|
else if (a.ip == b.ip)
|
|
return ntohs(a.port) < ntohs(b.port);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
std::vector<unsigned char> CAddress::GetKey() const
|
|
{
|
|
CDataStream ss;
|
|
ss.reserve(18);
|
|
ss << FLATDATA(pchReserved) << ip << port;
|
|
|
|
#if defined(_MSC_VER) && _MSC_VER < 1300
|
|
return std::vector<unsigned char>((unsigned char*)&ss.begin()[0], (unsigned char*)&ss.end()[0]);
|
|
#else
|
|
return std::vector<unsigned char>(ss.begin(), ss.end());
|
|
#endif
|
|
}
|
|
|
|
struct sockaddr_in CAddress::GetSockAddr() const
|
|
{
|
|
struct sockaddr_in sockaddr;
|
|
memset(&sockaddr, 0, sizeof(sockaddr));
|
|
sockaddr.sin_family = AF_INET;
|
|
sockaddr.sin_addr.s_addr = ip;
|
|
sockaddr.sin_port = port;
|
|
return sockaddr;
|
|
}
|
|
|
|
bool CAddress::IsIPv4() const
|
|
{
|
|
return (memcmp(pchReserved, pchIPv4, sizeof(pchIPv4)) == 0);
|
|
}
|
|
|
|
bool CAddress::IsRFC1918() const
|
|
{
|
|
return IsIPv4() && (GetByte(3) == 10 ||
|
|
(GetByte(3) == 192 && GetByte(2) == 168) ||
|
|
(GetByte(3) == 172 &&
|
|
(GetByte(2) >= 16 && GetByte(2) <= 31)));
|
|
}
|
|
|
|
bool CAddress::IsRFC3927() const
|
|
{
|
|
return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
|
|
}
|
|
|
|
bool CAddress::IsLocal() const
|
|
{
|
|
return IsIPv4() && (GetByte(3) == 127 ||
|
|
GetByte(3) == 0);
|
|
}
|
|
|
|
bool CAddress::IsRoutable() const
|
|
{
|
|
return IsValid() &&
|
|
!(IsRFC1918() || IsRFC3927() || IsLocal());
|
|
}
|
|
|
|
bool CAddress::IsValid() const
|
|
{
|
|
// Clean up 3-byte shifted addresses caused by garbage in size field
|
|
// of addr messages from versions before 0.2.9 checksum.
|
|
// Two consecutive addr messages look like this:
|
|
// header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
|
|
// so if the first length field is garbled, it reads the second batch
|
|
// of addr misaligned by 3 bytes.
|
|
if (memcmp(pchReserved, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
|
|
return false;
|
|
|
|
return (ip != 0 && ip != INADDR_NONE && port != htons(std::numeric_limits<unsigned short>::max()));
|
|
}
|
|
|
|
unsigned char CAddress::GetByte(int n) const
|
|
{
|
|
return ((unsigned char*)&ip)[3-n];
|
|
}
|
|
|
|
std::string CAddress::ToStringIPPort() const
|
|
{
|
|
return strprintf("%u.%u.%u.%u:%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0), ntohs(port));
|
|
}
|
|
|
|
std::string CAddress::ToStringIP() const
|
|
{
|
|
return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
|
|
}
|
|
|
|
std::string CAddress::ToStringPort() const
|
|
{
|
|
return strprintf("%u", ntohs(port));
|
|
}
|
|
|
|
std::string CAddress::ToString() const
|
|
{
|
|
return strprintf("%u.%u.%u.%u:%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0), ntohs(port));
|
|
}
|
|
|
|
void CAddress::print() const
|
|
{
|
|
printf("CAddress(%s)\n", ToString().c_str());
|
|
}
|
|
|
|
CInv::CInv()
|
|
{
|
|
type = 0;
|
|
hash = 0;
|
|
}
|
|
|
|
CInv::CInv(int typeIn, const uint256& hashIn)
|
|
{
|
|
type = typeIn;
|
|
hash = hashIn;
|
|
}
|
|
|
|
CInv::CInv(const std::string& strType, const uint256& hashIn)
|
|
{
|
|
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.c_str()));
|
|
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 < 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().substr(0,20).c_str());
|
|
}
|
|
|
|
void CInv::print() const
|
|
{
|
|
printf("CInv(%s)\n", ToString().c_str());
|
|
}
|