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// 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 __WXMSW__
# 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 };
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(USHRT_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());
}
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