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1143 lines
31 KiB
1143 lines
31 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto |
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// Copyright (c) 2009-2012 The Bitcoin developers |
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// Distributed under the MIT/X11 software license, see the accompanying |
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// file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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#include "netbase.h" |
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#include "util.h" |
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#include "sync.h" |
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#include "hash.h" |
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#ifndef WIN32 |
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#include <fcntl.h> |
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#endif |
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|
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#include <boost/algorithm/string/case_conv.hpp> // for to_lower() |
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#include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith() |
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|
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#if !defined(HAVE_MSG_NOSIGNAL) |
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#define MSG_NOSIGNAL 0 |
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#endif |
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using namespace std; |
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|
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// Settings |
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static proxyType proxyInfo[NET_MAX]; |
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static proxyType nameproxyInfo; |
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static CCriticalSection cs_proxyInfos; |
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int nConnectTimeout = 5000; |
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bool fNameLookup = false; |
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|
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static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff }; |
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enum Network ParseNetwork(std::string net) { |
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boost::to_lower(net); |
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if (net == "ipv4") return NET_IPV4; |
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if (net == "ipv6") return NET_IPV6; |
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if (net == "tor") return NET_TOR; |
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return NET_UNROUTABLE; |
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} |
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void SplitHostPort(std::string in, int &portOut, std::string &hostOut) { |
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size_t colon = in.find_last_of(':'); |
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// if a : is found, and it either follows a [...], or no other : is in the string, treat it as port separator |
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bool fHaveColon = colon != in.npos; |
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bool fBracketed = fHaveColon && (in[0]=='[' && in[colon-1]==']'); // if there is a colon, and in[0]=='[', colon is not 0, so in[colon-1] is safe |
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bool fMultiColon = fHaveColon && (in.find_last_of(':',colon-1) != in.npos); |
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if (fHaveColon && (colon==0 || fBracketed || !fMultiColon)) { |
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char *endp = NULL; |
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int n = strtol(in.c_str() + colon + 1, &endp, 10); |
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if (endp && *endp == 0 && n >= 0) { |
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in = in.substr(0, colon); |
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if (n > 0 && n < 0x10000) |
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portOut = n; |
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} |
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} |
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if (in.size()>0 && in[0] == '[' && in[in.size()-1] == ']') |
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hostOut = in.substr(1, in.size()-2); |
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else |
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hostOut = in; |
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} |
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bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup) |
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{ |
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vIP.clear(); |
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|
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{ |
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CNetAddr addr; |
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if (addr.SetSpecial(std::string(pszName))) { |
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vIP.push_back(addr); |
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return true; |
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} |
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} |
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struct addrinfo aiHint; |
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memset(&aiHint, 0, sizeof(struct addrinfo)); |
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|
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aiHint.ai_socktype = SOCK_STREAM; |
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aiHint.ai_protocol = IPPROTO_TCP; |
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#ifdef USE_IPV6 |
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aiHint.ai_family = AF_UNSPEC; |
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#else |
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aiHint.ai_family = AF_INET; |
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#endif |
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#ifdef WIN32 |
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aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST; |
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#else |
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aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST; |
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#endif |
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struct addrinfo *aiRes = NULL; |
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int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes); |
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if (nErr) |
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return false; |
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struct addrinfo *aiTrav = aiRes; |
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while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions)) |
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{ |
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if (aiTrav->ai_family == AF_INET) |
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{ |
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assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in)); |
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vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr)); |
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} |
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#ifdef USE_IPV6 |
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if (aiTrav->ai_family == AF_INET6) |
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{ |
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assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6)); |
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vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr)); |
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} |
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#endif |
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aiTrav = aiTrav->ai_next; |
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} |
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freeaddrinfo(aiRes); |
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return (vIP.size() > 0); |
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} |
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bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup) |
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{ |
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std::string strHost(pszName); |
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if (strHost.empty()) |
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return false; |
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if (boost::algorithm::starts_with(strHost, "[") && boost::algorithm::ends_with(strHost, "]")) |
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{ |
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strHost = strHost.substr(1, strHost.size() - 2); |
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} |
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return LookupIntern(strHost.c_str(), vIP, nMaxSolutions, fAllowLookup); |
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} |
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bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions) |
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{ |
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return LookupHost(pszName, vIP, nMaxSolutions, false); |
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} |
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bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions) |
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{ |
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if (pszName[0] == 0) |
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return false; |
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int port = portDefault; |
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std::string hostname = ""; |
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SplitHostPort(std::string(pszName), port, hostname); |
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std::vector<CNetAddr> vIP; |
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bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup); |
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if (!fRet) |
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return false; |
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vAddr.resize(vIP.size()); |
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for (unsigned int i = 0; i < vIP.size(); i++) |
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vAddr[i] = CService(vIP[i], port); |
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return true; |
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} |
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bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup) |
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{ |
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std::vector<CService> vService; |
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bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1); |
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if (!fRet) |
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return false; |
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addr = vService[0]; |
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return true; |
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} |
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bool LookupNumeric(const char *pszName, CService& addr, int portDefault) |
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{ |
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return Lookup(pszName, addr, portDefault, false); |
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} |
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bool static Socks4(const CService &addrDest, SOCKET& hSocket) |
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{ |
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LogPrintf("SOCKS4 connecting %s\n", addrDest.ToString().c_str()); |
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if (!addrDest.IsIPv4()) |
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{ |
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closesocket(hSocket); |
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return error("Proxy destination is not IPv4"); |
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} |
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char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user"; |
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struct sockaddr_in addr; |
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socklen_t len = sizeof(addr); |
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if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET) |
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{ |
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closesocket(hSocket); |
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return error("Cannot get proxy destination address"); |
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} |
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memcpy(pszSocks4IP + 2, &addr.sin_port, 2); |
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memcpy(pszSocks4IP + 4, &addr.sin_addr, 4); |
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char* pszSocks4 = pszSocks4IP; |
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int nSize = sizeof(pszSocks4IP); |
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int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL); |
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if (ret != nSize) |
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{ |
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closesocket(hSocket); |
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return error("Error sending to proxy"); |
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} |
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char pchRet[8]; |
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if (recv(hSocket, pchRet, 8, 0) != 8) |
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{ |
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closesocket(hSocket); |
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return error("Error reading proxy response"); |
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} |
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if (pchRet[1] != 0x5a) |
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{ |
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closesocket(hSocket); |
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if (pchRet[1] != 0x5b) |
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LogPrintf("ERROR: Proxy returned error %d\n", pchRet[1]); |
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return false; |
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} |
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LogPrintf("SOCKS4 connected %s\n", addrDest.ToString().c_str()); |
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return true; |
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} |
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bool static Socks5(string strDest, int port, SOCKET& hSocket) |
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{ |
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LogPrintf("SOCKS5 connecting %s\n", strDest.c_str()); |
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if (strDest.size() > 255) |
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{ |
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closesocket(hSocket); |
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return error("Hostname too long"); |
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} |
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char pszSocks5Init[] = "\5\1\0"; |
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ssize_t nSize = sizeof(pszSocks5Init) - 1; |
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ssize_t ret = send(hSocket, pszSocks5Init, nSize, MSG_NOSIGNAL); |
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if (ret != nSize) |
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{ |
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closesocket(hSocket); |
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return error("Error sending to proxy"); |
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} |
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char pchRet1[2]; |
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if (recv(hSocket, pchRet1, 2, 0) != 2) |
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{ |
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closesocket(hSocket); |
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return error("Error reading proxy response"); |
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} |
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if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00) |
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{ |
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closesocket(hSocket); |
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return error("Proxy failed to initialize"); |
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} |
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string strSocks5("\5\1"); |
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strSocks5 += '\000'; strSocks5 += '\003'; |
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strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255)); |
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strSocks5 += strDest; |
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strSocks5 += static_cast<char>((port >> 8) & 0xFF); |
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strSocks5 += static_cast<char>((port >> 0) & 0xFF); |
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ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL); |
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if (ret != (ssize_t)strSocks5.size()) |
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{ |
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closesocket(hSocket); |
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return error("Error sending to proxy"); |
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} |
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char pchRet2[4]; |
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if (recv(hSocket, pchRet2, 4, 0) != 4) |
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{ |
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closesocket(hSocket); |
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return error("Error reading proxy response"); |
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} |
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if (pchRet2[0] != 0x05) |
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{ |
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closesocket(hSocket); |
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return error("Proxy failed to accept request"); |
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} |
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if (pchRet2[1] != 0x00) |
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{ |
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closesocket(hSocket); |
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switch (pchRet2[1]) |
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{ |
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case 0x01: return error("Proxy error: general failure"); |
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case 0x02: return error("Proxy error: connection not allowed"); |
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case 0x03: return error("Proxy error: network unreachable"); |
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case 0x04: return error("Proxy error: host unreachable"); |
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case 0x05: return error("Proxy error: connection refused"); |
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case 0x06: return error("Proxy error: TTL expired"); |
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case 0x07: return error("Proxy error: protocol error"); |
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case 0x08: return error("Proxy error: address type not supported"); |
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default: return error("Proxy error: unknown"); |
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} |
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} |
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if (pchRet2[2] != 0x00) |
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{ |
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closesocket(hSocket); |
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return error("Error: malformed proxy response"); |
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} |
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char pchRet3[256]; |
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switch (pchRet2[3]) |
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{ |
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case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break; |
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case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break; |
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case 0x03: |
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{ |
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ret = recv(hSocket, pchRet3, 1, 0) != 1; |
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if (ret) |
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return error("Error reading from proxy"); |
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int nRecv = pchRet3[0]; |
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ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv; |
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break; |
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} |
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default: closesocket(hSocket); return error("Error: malformed proxy response"); |
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} |
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if (ret) |
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{ |
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closesocket(hSocket); |
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return error("Error reading from proxy"); |
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} |
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if (recv(hSocket, pchRet3, 2, 0) != 2) |
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{ |
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closesocket(hSocket); |
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return error("Error reading from proxy"); |
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} |
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LogPrintf("SOCKS5 connected %s\n", strDest.c_str()); |
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return true; |
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} |
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bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout) |
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{ |
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hSocketRet = INVALID_SOCKET; |
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#ifdef USE_IPV6 |
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struct sockaddr_storage sockaddr; |
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#else |
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struct sockaddr sockaddr; |
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#endif |
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socklen_t len = sizeof(sockaddr); |
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if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) { |
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LogPrintf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str()); |
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return false; |
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} |
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SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP); |
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if (hSocket == INVALID_SOCKET) |
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return false; |
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#ifdef SO_NOSIGPIPE |
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int set = 1; |
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setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int)); |
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#endif |
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#ifdef WIN32 |
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u_long fNonblock = 1; |
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if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR) |
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#else |
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int fFlags = fcntl(hSocket, F_GETFL, 0); |
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if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1) |
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#endif |
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{ |
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closesocket(hSocket); |
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return false; |
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} |
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if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR) |
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{ |
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// WSAEINVAL is here because some legacy version of winsock uses it |
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if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL) |
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{ |
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struct timeval timeout; |
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timeout.tv_sec = nTimeout / 1000; |
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timeout.tv_usec = (nTimeout % 1000) * 1000; |
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fd_set fdset; |
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FD_ZERO(&fdset); |
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FD_SET(hSocket, &fdset); |
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int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout); |
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if (nRet == 0) |
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{ |
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LogPrint("net", "connection timeout\n"); |
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closesocket(hSocket); |
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return false; |
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} |
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if (nRet == SOCKET_ERROR) |
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{ |
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LogPrintf("select() for connection failed: %i\n",WSAGetLastError()); |
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closesocket(hSocket); |
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return false; |
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} |
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socklen_t nRetSize = sizeof(nRet); |
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#ifdef WIN32 |
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if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR) |
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#else |
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if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR) |
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#endif |
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{ |
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LogPrintf("getsockopt() for connection failed: %i\n",WSAGetLastError()); |
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closesocket(hSocket); |
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return false; |
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} |
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if (nRet != 0) |
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{ |
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LogPrintf("connect() failed after select(): %s\n",strerror(nRet)); |
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closesocket(hSocket); |
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return false; |
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} |
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} |
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#ifdef WIN32 |
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else if (WSAGetLastError() != WSAEISCONN) |
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#else |
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else |
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#endif |
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{ |
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LogPrintf("connect() failed: %i\n",WSAGetLastError()); |
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closesocket(hSocket); |
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return false; |
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} |
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} |
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// this isn't even strictly necessary |
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// CNode::ConnectNode immediately turns the socket back to non-blocking |
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// but we'll turn it back to blocking just in case |
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#ifdef WIN32 |
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fNonblock = 0; |
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if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR) |
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#else |
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fFlags = fcntl(hSocket, F_GETFL, 0); |
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if (fcntl(hSocket, F_SETFL, fFlags & ~O_NONBLOCK) == SOCKET_ERROR) |
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#endif |
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{ |
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closesocket(hSocket); |
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return false; |
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} |
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hSocketRet = hSocket; |
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return true; |
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} |
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|
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bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) { |
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assert(net >= 0 && net < NET_MAX); |
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if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5) |
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return false; |
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if (nSocksVersion != 0 && !addrProxy.IsValid()) |
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return false; |
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LOCK(cs_proxyInfos); |
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proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion); |
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return true; |
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} |
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|
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bool GetProxy(enum Network net, proxyType &proxyInfoOut) { |
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assert(net >= 0 && net < NET_MAX); |
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LOCK(cs_proxyInfos); |
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if (!proxyInfo[net].second) |
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return false; |
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proxyInfoOut = proxyInfo[net]; |
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return true; |
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} |
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|
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bool SetNameProxy(CService addrProxy, int nSocksVersion) { |
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if (nSocksVersion != 0 && nSocksVersion != 5) |
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return false; |
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if (nSocksVersion != 0 && !addrProxy.IsValid()) |
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return false; |
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LOCK(cs_proxyInfos); |
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nameproxyInfo = std::make_pair(addrProxy, nSocksVersion); |
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return true; |
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} |
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|
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bool GetNameProxy(proxyType &nameproxyInfoOut) { |
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LOCK(cs_proxyInfos); |
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if (!nameproxyInfo.second) |
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return false; |
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nameproxyInfoOut = nameproxyInfo; |
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return true; |
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} |
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|
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bool HaveNameProxy() { |
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LOCK(cs_proxyInfos); |
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return nameproxyInfo.second != 0; |
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} |
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|
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bool IsProxy(const CNetAddr &addr) { |
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LOCK(cs_proxyInfos); |
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for (int i = 0; i < NET_MAX; i++) { |
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if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first)) |
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return true; |
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} |
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return false; |
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} |
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|
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bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout) |
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{ |
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proxyType proxy; |
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|
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// no proxy needed |
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if (!GetProxy(addrDest.GetNetwork(), proxy)) |
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return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout); |
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|
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SOCKET hSocket = INVALID_SOCKET; |
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|
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// first connect to proxy server |
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if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout)) |
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return false; |
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|
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// do socks negotiation |
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switch (proxy.second) { |
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case 4: |
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if (!Socks4(addrDest, hSocket)) |
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return false; |
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break; |
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case 5: |
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if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket)) |
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return false; |
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break; |
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default: |
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return false; |
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} |
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|
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hSocketRet = hSocket; |
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return true; |
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} |
|
|
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bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout) |
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{ |
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string strDest; |
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int port = portDefault; |
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SplitHostPort(string(pszDest), port, strDest); |
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|
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SOCKET hSocket = INVALID_SOCKET; |
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|
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proxyType nameproxy; |
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GetNameProxy(nameproxy); |
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|
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CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port); |
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if (addrResolved.IsValid()) { |
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addr = addrResolved; |
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return ConnectSocket(addr, hSocketRet, nTimeout); |
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} |
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addr = CService("0.0.0.0:0"); |
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if (!nameproxy.second) |
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return false; |
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if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout)) |
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return false; |
|
|
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switch(nameproxy.second) { |
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default: |
|
case 4: return false; |
|
case 5: |
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if (!Socks5(strDest, port, hSocket)) |
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return false; |
|
break; |
|
} |
|
|
|
hSocketRet = hSocket; |
|
return true; |
|
} |
|
|
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void CNetAddr::Init() |
|
{ |
|
memset(ip, 0, sizeof(ip)); |
|
} |
|
|
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void CNetAddr::SetIP(const CNetAddr& ipIn) |
|
{ |
|
memcpy(ip, ipIn.ip, sizeof(ip)); |
|
} |
|
|
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static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43}; |
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|
|
bool CNetAddr::SetSpecial(const std::string &strName) |
|
{ |
|
if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") { |
|
std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str()); |
|
if (vchAddr.size() != 16-sizeof(pchOnionCat)) |
|
return false; |
|
memcpy(ip, pchOnionCat, sizeof(pchOnionCat)); |
|
for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++) |
|
ip[i + sizeof(pchOnionCat)] = vchAddr[i]; |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
CNetAddr::CNetAddr() |
|
{ |
|
Init(); |
|
} |
|
|
|
CNetAddr::CNetAddr(const struct in_addr& ipv4Addr) |
|
{ |
|
memcpy(ip, pchIPv4, 12); |
|
memcpy(ip+12, &ipv4Addr, 4); |
|
} |
|
|
|
#ifdef USE_IPV6 |
|
CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr) |
|
{ |
|
memcpy(ip, &ipv6Addr, 16); |
|
} |
|
#endif |
|
|
|
CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup) |
|
{ |
|
Init(); |
|
std::vector<CNetAddr> vIP; |
|
if (LookupHost(pszIp, vIP, 1, fAllowLookup)) |
|
*this = vIP[0]; |
|
} |
|
|
|
CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup) |
|
{ |
|
Init(); |
|
std::vector<CNetAddr> vIP; |
|
if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup)) |
|
*this = vIP[0]; |
|
} |
|
|
|
unsigned int CNetAddr::GetByte(int n) const |
|
{ |
|
return ip[15-n]; |
|
} |
|
|
|
bool CNetAddr::IsIPv4() const |
|
{ |
|
return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0); |
|
} |
|
|
|
bool CNetAddr::IsIPv6() const |
|
{ |
|
return (!IsIPv4() && !IsTor()); |
|
} |
|
|
|
bool CNetAddr::IsRFC1918() const |
|
{ |
|
return IsIPv4() && ( |
|
GetByte(3) == 10 || |
|
(GetByte(3) == 192 && GetByte(2) == 168) || |
|
(GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31))); |
|
} |
|
|
|
bool CNetAddr::IsRFC3927() const |
|
{ |
|
return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254); |
|
} |
|
|
|
bool CNetAddr::IsRFC3849() const |
|
{ |
|
return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8; |
|
} |
|
|
|
bool CNetAddr::IsRFC3964() const |
|
{ |
|
return (GetByte(15) == 0x20 && GetByte(14) == 0x02); |
|
} |
|
|
|
bool CNetAddr::IsRFC6052() const |
|
{ |
|
static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0}; |
|
return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0); |
|
} |
|
|
|
bool CNetAddr::IsRFC4380() const |
|
{ |
|
return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0); |
|
} |
|
|
|
bool CNetAddr::IsRFC4862() const |
|
{ |
|
static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0}; |
|
return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0); |
|
} |
|
|
|
bool CNetAddr::IsRFC4193() const |
|
{ |
|
return ((GetByte(15) & 0xFE) == 0xFC); |
|
} |
|
|
|
bool CNetAddr::IsRFC6145() const |
|
{ |
|
static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0}; |
|
return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0); |
|
} |
|
|
|
bool CNetAddr::IsRFC4843() const |
|
{ |
|
return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10); |
|
} |
|
|
|
bool CNetAddr::IsTor() const |
|
{ |
|
return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0); |
|
} |
|
|
|
bool CNetAddr::IsLocal() const |
|
{ |
|
// IPv4 loopback |
|
if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0)) |
|
return true; |
|
|
|
// IPv6 loopback (::1/128) |
|
static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1}; |
|
if (memcmp(ip, pchLocal, 16) == 0) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
bool CNetAddr::IsMulticast() const |
|
{ |
|
return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0) |
|
|| (GetByte(15) == 0xFF); |
|
} |
|
|
|
bool CNetAddr::IsValid() const |
|
{ |
|
// Cleanup 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(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0) |
|
return false; |
|
|
|
// unspecified IPv6 address (::/128) |
|
unsigned char ipNone[16] = {}; |
|
if (memcmp(ip, ipNone, 16) == 0) |
|
return false; |
|
|
|
// documentation IPv6 address |
|
if (IsRFC3849()) |
|
return false; |
|
|
|
if (IsIPv4()) |
|
{ |
|
// INADDR_NONE |
|
uint32_t ipNone = INADDR_NONE; |
|
if (memcmp(ip+12, &ipNone, 4) == 0) |
|
return false; |
|
|
|
// 0 |
|
ipNone = 0; |
|
if (memcmp(ip+12, &ipNone, 4) == 0) |
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
bool CNetAddr::IsRoutable() const |
|
{ |
|
return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || (IsRFC4193() && !IsTor()) || IsRFC4843() || IsLocal()); |
|
} |
|
|
|
enum Network CNetAddr::GetNetwork() const |
|
{ |
|
if (!IsRoutable()) |
|
return NET_UNROUTABLE; |
|
|
|
if (IsIPv4()) |
|
return NET_IPV4; |
|
|
|
if (IsTor()) |
|
return NET_TOR; |
|
|
|
return NET_IPV6; |
|
} |
|
|
|
std::string CNetAddr::ToStringIP() const |
|
{ |
|
if (IsTor()) |
|
return EncodeBase32(&ip[6], 10) + ".onion"; |
|
CService serv(*this, 0); |
|
#ifdef USE_IPV6 |
|
struct sockaddr_storage sockaddr; |
|
#else |
|
struct sockaddr sockaddr; |
|
#endif |
|
socklen_t socklen = sizeof(sockaddr); |
|
if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) { |
|
char name[1025] = ""; |
|
if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST)) |
|
return std::string(name); |
|
} |
|
if (IsIPv4()) |
|
return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0)); |
|
else |
|
return strprintf("%x:%x:%x:%x:%x:%x:%x:%x", |
|
GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12), |
|
GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8), |
|
GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4), |
|
GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0)); |
|
} |
|
|
|
std::string CNetAddr::ToString() const |
|
{ |
|
return ToStringIP(); |
|
} |
|
|
|
bool operator==(const CNetAddr& a, const CNetAddr& b) |
|
{ |
|
return (memcmp(a.ip, b.ip, 16) == 0); |
|
} |
|
|
|
bool operator!=(const CNetAddr& a, const CNetAddr& b) |
|
{ |
|
return (memcmp(a.ip, b.ip, 16) != 0); |
|
} |
|
|
|
bool operator<(const CNetAddr& a, const CNetAddr& b) |
|
{ |
|
return (memcmp(a.ip, b.ip, 16) < 0); |
|
} |
|
|
|
bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const |
|
{ |
|
if (!IsIPv4()) |
|
return false; |
|
memcpy(pipv4Addr, ip+12, 4); |
|
return true; |
|
} |
|
|
|
#ifdef USE_IPV6 |
|
bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const |
|
{ |
|
memcpy(pipv6Addr, ip, 16); |
|
return true; |
|
} |
|
#endif |
|
|
|
// get canonical identifier of an address' group |
|
// no two connections will be attempted to addresses with the same group |
|
std::vector<unsigned char> CNetAddr::GetGroup() const |
|
{ |
|
std::vector<unsigned char> vchRet; |
|
int nClass = NET_IPV6; |
|
int nStartByte = 0; |
|
int nBits = 16; |
|
|
|
// all local addresses belong to the same group |
|
if (IsLocal()) |
|
{ |
|
nClass = 255; |
|
nBits = 0; |
|
} |
|
|
|
// all unroutable addresses belong to the same group |
|
if (!IsRoutable()) |
|
{ |
|
nClass = NET_UNROUTABLE; |
|
nBits = 0; |
|
} |
|
// for IPv4 addresses, '1' + the 16 higher-order bits of the IP |
|
// includes mapped IPv4, SIIT translated IPv4, and the well-known prefix |
|
else if (IsIPv4() || IsRFC6145() || IsRFC6052()) |
|
{ |
|
nClass = NET_IPV4; |
|
nStartByte = 12; |
|
} |
|
// for 6to4 tunnelled addresses, use the encapsulated IPv4 address |
|
else if (IsRFC3964()) |
|
{ |
|
nClass = NET_IPV4; |
|
nStartByte = 2; |
|
} |
|
// for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address |
|
else if (IsRFC4380()) |
|
{ |
|
vchRet.push_back(NET_IPV4); |
|
vchRet.push_back(GetByte(3) ^ 0xFF); |
|
vchRet.push_back(GetByte(2) ^ 0xFF); |
|
return vchRet; |
|
} |
|
else if (IsTor()) |
|
{ |
|
nClass = NET_TOR; |
|
nStartByte = 6; |
|
nBits = 4; |
|
} |
|
// for he.net, use /36 groups |
|
else if (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x04 && GetByte(12) == 0x70) |
|
nBits = 36; |
|
// for the rest of the IPv6 network, use /32 groups |
|
else |
|
nBits = 32; |
|
|
|
vchRet.push_back(nClass); |
|
while (nBits >= 8) |
|
{ |
|
vchRet.push_back(GetByte(15 - nStartByte)); |
|
nStartByte++; |
|
nBits -= 8; |
|
} |
|
if (nBits > 0) |
|
vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1)); |
|
|
|
return vchRet; |
|
} |
|
|
|
uint64 CNetAddr::GetHash() const |
|
{ |
|
uint256 hash = Hash(&ip[0], &ip[16]); |
|
uint64 nRet; |
|
memcpy(&nRet, &hash, sizeof(nRet)); |
|
return nRet; |
|
} |
|
|
|
void CNetAddr::print() const |
|
{ |
|
LogPrintf("CNetAddr(%s)\n", ToString().c_str()); |
|
} |
|
|
|
// private extensions to enum Network, only returned by GetExtNetwork, |
|
// and only used in GetReachabilityFrom |
|
static const int NET_UNKNOWN = NET_MAX + 0; |
|
static const int NET_TEREDO = NET_MAX + 1; |
|
int static GetExtNetwork(const CNetAddr *addr) |
|
{ |
|
if (addr == NULL) |
|
return NET_UNKNOWN; |
|
if (addr->IsRFC4380()) |
|
return NET_TEREDO; |
|
return addr->GetNetwork(); |
|
} |
|
|
|
/** Calculates a metric for how reachable (*this) is from a given partner */ |
|
int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const |
|
{ |
|
enum Reachability { |
|
REACH_UNREACHABLE, |
|
REACH_DEFAULT, |
|
REACH_TEREDO, |
|
REACH_IPV6_WEAK, |
|
REACH_IPV4, |
|
REACH_IPV6_STRONG, |
|
REACH_PRIVATE |
|
}; |
|
|
|
if (!IsRoutable()) |
|
return REACH_UNREACHABLE; |
|
|
|
int ourNet = GetExtNetwork(this); |
|
int theirNet = GetExtNetwork(paddrPartner); |
|
bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145(); |
|
|
|
switch(theirNet) { |
|
case NET_IPV4: |
|
switch(ourNet) { |
|
default: return REACH_DEFAULT; |
|
case NET_IPV4: return REACH_IPV4; |
|
} |
|
case NET_IPV6: |
|
switch(ourNet) { |
|
default: return REACH_DEFAULT; |
|
case NET_TEREDO: return REACH_TEREDO; |
|
case NET_IPV4: return REACH_IPV4; |
|
case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled |
|
} |
|
case NET_TOR: |
|
switch(ourNet) { |
|
default: return REACH_DEFAULT; |
|
case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well |
|
case NET_TOR: return REACH_PRIVATE; |
|
} |
|
case NET_TEREDO: |
|
switch(ourNet) { |
|
default: return REACH_DEFAULT; |
|
case NET_TEREDO: return REACH_TEREDO; |
|
case NET_IPV6: return REACH_IPV6_WEAK; |
|
case NET_IPV4: return REACH_IPV4; |
|
} |
|
case NET_UNKNOWN: |
|
case NET_UNROUTABLE: |
|
default: |
|
switch(ourNet) { |
|
default: return REACH_DEFAULT; |
|
case NET_TEREDO: return REACH_TEREDO; |
|
case NET_IPV6: return REACH_IPV6_WEAK; |
|
case NET_IPV4: return REACH_IPV4; |
|
case NET_TOR: return REACH_PRIVATE; // either from Tor, or don't care about our address |
|
} |
|
} |
|
} |
|
|
|
void CService::Init() |
|
{ |
|
port = 0; |
|
} |
|
|
|
CService::CService() |
|
{ |
|
Init(); |
|
} |
|
|
|
CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn) |
|
{ |
|
} |
|
|
|
CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn) |
|
{ |
|
} |
|
|
|
#ifdef USE_IPV6 |
|
CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn) |
|
{ |
|
} |
|
#endif |
|
|
|
CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port)) |
|
{ |
|
assert(addr.sin_family == AF_INET); |
|
} |
|
|
|
#ifdef USE_IPV6 |
|
CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port)) |
|
{ |
|
assert(addr.sin6_family == AF_INET6); |
|
} |
|
#endif |
|
|
|
bool CService::SetSockAddr(const struct sockaddr *paddr) |
|
{ |
|
switch (paddr->sa_family) { |
|
case AF_INET: |
|
*this = CService(*(const struct sockaddr_in*)paddr); |
|
return true; |
|
#ifdef USE_IPV6 |
|
case AF_INET6: |
|
*this = CService(*(const struct sockaddr_in6*)paddr); |
|
return true; |
|
#endif |
|
default: |
|
return false; |
|
} |
|
} |
|
|
|
CService::CService(const char *pszIpPort, bool fAllowLookup) |
|
{ |
|
Init(); |
|
CService ip; |
|
if (Lookup(pszIpPort, ip, 0, fAllowLookup)) |
|
*this = ip; |
|
} |
|
|
|
CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup) |
|
{ |
|
Init(); |
|
CService ip; |
|
if (Lookup(pszIpPort, ip, portDefault, fAllowLookup)) |
|
*this = ip; |
|
} |
|
|
|
CService::CService(const std::string &strIpPort, bool fAllowLookup) |
|
{ |
|
Init(); |
|
CService ip; |
|
if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup)) |
|
*this = ip; |
|
} |
|
|
|
CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup) |
|
{ |
|
Init(); |
|
CService ip; |
|
if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup)) |
|
*this = ip; |
|
} |
|
|
|
unsigned short CService::GetPort() const |
|
{ |
|
return port; |
|
} |
|
|
|
bool operator==(const CService& a, const CService& b) |
|
{ |
|
return (CNetAddr)a == (CNetAddr)b && a.port == b.port; |
|
} |
|
|
|
bool operator!=(const CService& a, const CService& b) |
|
{ |
|
return (CNetAddr)a != (CNetAddr)b || a.port != b.port; |
|
} |
|
|
|
bool operator<(const CService& a, const CService& b) |
|
{ |
|
return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port); |
|
} |
|
|
|
bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const |
|
{ |
|
if (IsIPv4()) { |
|
if (*addrlen < (socklen_t)sizeof(struct sockaddr_in)) |
|
return false; |
|
*addrlen = sizeof(struct sockaddr_in); |
|
struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr; |
|
memset(paddrin, 0, *addrlen); |
|
if (!GetInAddr(&paddrin->sin_addr)) |
|
return false; |
|
paddrin->sin_family = AF_INET; |
|
paddrin->sin_port = htons(port); |
|
return true; |
|
} |
|
#ifdef USE_IPV6 |
|
if (IsIPv6()) { |
|
if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6)) |
|
return false; |
|
*addrlen = sizeof(struct sockaddr_in6); |
|
struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr; |
|
memset(paddrin6, 0, *addrlen); |
|
if (!GetIn6Addr(&paddrin6->sin6_addr)) |
|
return false; |
|
paddrin6->sin6_family = AF_INET6; |
|
paddrin6->sin6_port = htons(port); |
|
return true; |
|
} |
|
#endif |
|
return false; |
|
} |
|
|
|
std::vector<unsigned char> CService::GetKey() const |
|
{ |
|
std::vector<unsigned char> vKey; |
|
vKey.resize(18); |
|
memcpy(&vKey[0], ip, 16); |
|
vKey[16] = port / 0x100; |
|
vKey[17] = port & 0x0FF; |
|
return vKey; |
|
} |
|
|
|
std::string CService::ToStringPort() const |
|
{ |
|
return strprintf("%u", port); |
|
} |
|
|
|
std::string CService::ToStringIPPort() const |
|
{ |
|
if (IsIPv4() || IsTor()) { |
|
return ToStringIP() + ":" + ToStringPort(); |
|
} else { |
|
return "[" + ToStringIP() + "]:" + ToStringPort(); |
|
} |
|
} |
|
|
|
std::string CService::ToString() const |
|
{ |
|
return ToStringIPPort(); |
|
} |
|
|
|
void CService::print() const |
|
{ |
|
LogPrintf("CService(%s)\n", ToString().c_str()); |
|
} |
|
|
|
void CService::SetPort(unsigned short portIn) |
|
{ |
|
port = portIn; |
|
}
|
|
|