1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2011 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.
10 # include <arpa/inet.h>
13 // Prototypes from net.h, but that header (currently) stinks, can't #include it without breaking things
14 bool Lookup(const char *pszName, std::vector<CAddress>& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup = false, int portDefault = 0, bool fAllowPort = false);
15 bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup = false, int portDefault = 0, bool fAllowPort = false);
17 static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
19 CMessageHeader::CMessageHeader()
21 memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart));
22 memset(pchCommand, 0, sizeof(pchCommand));
28 CMessageHeader::CMessageHeader(const char* pszCommand, unsigned int nMessageSizeIn)
30 memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart));
31 strncpy(pchCommand, pszCommand, COMMAND_SIZE);
32 nMessageSize = nMessageSizeIn;
36 std::string CMessageHeader::GetCommand() const
38 if (pchCommand[COMMAND_SIZE-1] == 0)
39 return std::string(pchCommand, pchCommand + strlen(pchCommand));
41 return std::string(pchCommand, pchCommand + COMMAND_SIZE);
44 bool CMessageHeader::IsValid() const
47 if (memcmp(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart)) != 0)
50 // Check the command string for errors
51 for (const char* p1 = pchCommand; p1 < pchCommand + COMMAND_SIZE; p1++)
55 // Must be all zeros after the first zero
56 for (; p1 < pchCommand + COMMAND_SIZE; p1++)
60 else if (*p1 < ' ' || *p1 > 0x7E)
65 if (nMessageSize > MAX_SIZE)
67 printf("CMessageHeader::IsValid() : (%s, %u bytes) nMessageSize > MAX_SIZE\n", GetCommand().c_str(), nMessageSize);
79 CAddress::CAddress(unsigned int ipIn, unsigned short portIn, uint64 nServicesIn)
83 port = htons(portIn == 0 ? GetDefaultPort() : portIn);
84 nServices = nServicesIn;
87 CAddress::CAddress(const struct sockaddr_in& sockaddr, uint64 nServicesIn)
90 ip = sockaddr.sin_addr.s_addr;
91 port = sockaddr.sin_port;
92 nServices = nServicesIn;
95 CAddress::CAddress(const char* pszIn, int portIn, bool fNameLookup, uint64 nServicesIn)
98 Lookup(pszIn, *this, nServicesIn, fNameLookup, portIn);
101 CAddress::CAddress(const char* pszIn, bool fNameLookup, uint64 nServicesIn)
104 Lookup(pszIn, *this, nServicesIn, fNameLookup, 0, true);
107 CAddress::CAddress(std::string strIn, int portIn, bool fNameLookup, uint64 nServicesIn)
110 Lookup(strIn.c_str(), *this, nServicesIn, fNameLookup, portIn);
113 CAddress::CAddress(std::string strIn, bool fNameLookup, uint64 nServicesIn)
116 Lookup(strIn.c_str(), *this, nServicesIn, fNameLookup, 0, true);
119 void CAddress::Init()
121 nServices = NODE_NETWORK;
122 memcpy(pchReserved, pchIPv4, sizeof(pchReserved));
124 port = htons(GetDefaultPort());
129 bool operator==(const CAddress& a, const CAddress& b)
131 return (memcmp(a.pchReserved, b.pchReserved, sizeof(a.pchReserved)) == 0 &&
136 bool operator!=(const CAddress& a, const CAddress& b)
141 bool operator<(const CAddress& a, const CAddress& b)
143 int ret = memcmp(a.pchReserved, b.pchReserved, sizeof(a.pchReserved));
148 if (ntohl(a.ip) < ntohl(b.ip))
150 else if (a.ip == b.ip)
151 return ntohs(a.port) < ntohs(b.port);
156 std::vector<unsigned char> CAddress::GetKey() const
160 ss << FLATDATA(pchReserved) << ip << port;
162 #if defined(_MSC_VER) && _MSC_VER < 1300
163 return std::vector<unsigned char>((unsigned char*)&ss.begin()[0], (unsigned char*)&ss.end()[0]);
165 return std::vector<unsigned char>(ss.begin(), ss.end());
169 struct sockaddr_in CAddress::GetSockAddr() const
171 struct sockaddr_in sockaddr;
172 memset(&sockaddr, 0, sizeof(sockaddr));
173 sockaddr.sin_family = AF_INET;
174 sockaddr.sin_addr.s_addr = ip;
175 sockaddr.sin_port = port;
179 bool CAddress::IsIPv4() const
181 return (memcmp(pchReserved, pchIPv4, sizeof(pchIPv4)) == 0);
184 bool CAddress::IsRFC1918() const
186 return IsIPv4() && (GetByte(3) == 10 ||
187 (GetByte(3) == 192 && GetByte(2) == 168) ||
188 (GetByte(3) == 172 &&
189 (GetByte(2) >= 16 && GetByte(2) <= 31)));
192 bool CAddress::IsRFC3927() const
194 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
197 bool CAddress::IsLocal() const
199 return IsIPv4() && (GetByte(3) == 127 ||
203 bool CAddress::IsRoutable() const
206 !(IsRFC1918() || IsRFC3927() || IsLocal());
209 bool CAddress::IsValid() const
211 // Clean up 3-byte shifted addresses caused by garbage in size field
212 // of addr messages from versions before 0.2.9 checksum.
213 // Two consecutive addr messages look like this:
214 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
215 // so if the first length field is garbled, it reads the second batch
216 // of addr misaligned by 3 bytes.
217 if (memcmp(pchReserved, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
220 return (ip != 0 && ip != INADDR_NONE && port != htons(USHRT_MAX));
223 unsigned char CAddress::GetByte(int n) const
225 return ((unsigned char*)&ip)[3-n];
228 std::string CAddress::ToStringIPPort() const
230 return strprintf("%u.%u.%u.%u:%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0), ntohs(port));
233 std::string CAddress::ToStringIP() const
235 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
238 std::string CAddress::ToStringPort() const
240 return strprintf("%u", ntohs(port));
243 std::string CAddress::ToString() const
245 return strprintf("%u.%u.%u.%u:%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0), ntohs(port));
248 void CAddress::print() const
250 printf("CAddress(%s)\n", ToString().c_str());