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- // ECOin - Copyright (c) - 2014/2022 - GPLv3 - epsylon@riseup.net (https://03c8.net)
- #include "netbase.h"
- #include "util.h"
- #include "sync.h"
- #ifndef WIN32
- #include <sys/fcntl.h>
- #endif
- #include "strlcpy.h"
- #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
- using namespace std;
- static proxyType proxyInfo[NET_MAX];
- static proxyType nameproxyInfo;
- static CCriticalSection cs_proxyInfos;
- int nConnectTimeout = 5000;
- bool fNameLookup = false;
- static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
- enum Network ParseNetwork(std::string net) {
- boost::to_lower(net);
- if (net == "ipv4") return NET_IPV4;
- if (net == "ipv6") return NET_IPV6;
- if (net == "tor") return NET_TOR;
- if (net == "i2p") return NET_I2P;
- return NET_UNROUTABLE;
- }
- void SplitHostPort(std::string in, int &portOut, std::string &hostOut) {
- size_t colon = in.find_last_of(':');
- bool fHaveColon = colon != in.npos;
- 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
- bool fMultiColon = fHaveColon && (in.find_last_of(':',colon-1) != in.npos);
- if (fHaveColon && (colon==0 || fBracketed || !fMultiColon)) {
- char *endp = NULL;
- int n = strtol(in.c_str() + colon + 1, &endp, 10);
- if (endp && *endp == 0 && n >= 0) {
- in = in.substr(0, colon);
- if (n > 0 && n < 0x10000)
- portOut = n;
- }
- }
- if (in.size()>0 && in[0] == '[' && in[in.size()-1] == ']')
- hostOut = in.substr(1, in.size()-2);
- else
- hostOut = in;
- }
- bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
- {
- vIP.clear();
- {
- CNetAddr addr;
- if (addr.SetSpecial(std::string(pszName))) {
- vIP.push_back(addr);
- return true;
- }
- }
- struct addrinfo aiHint;
- memset(&aiHint, 0, sizeof(struct addrinfo));
- aiHint.ai_socktype = SOCK_STREAM;
- aiHint.ai_protocol = IPPROTO_TCP;
- #ifdef WIN32
- # ifdef USE_IPV6
- aiHint.ai_family = AF_UNSPEC;
- # else
- aiHint.ai_family = AF_INET;
- # endif
- aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
- #else
- # ifdef USE_IPV6
- aiHint.ai_family = AF_UNSPEC;
- # else
- aiHint.ai_family = AF_INET;
- # endif
- aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
- #endif
- struct addrinfo *aiRes = NULL;
- int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
- if (nErr)
- return false;
- struct addrinfo *aiTrav = aiRes;
- while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions))
- {
- if (aiTrav->ai_family == AF_INET)
- {
- assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
- vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
- }
- #ifdef USE_IPV6
- if (aiTrav->ai_family == AF_INET6)
- {
- assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
- vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
- }
- #endif
- aiTrav = aiTrav->ai_next;
- }
- freeaddrinfo(aiRes);
- return (vIP.size() > 0);
- }
- bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
- {
- if (pszName[0] == 0)
- return false;
- char psz[256];
- char *pszHost = psz;
- strlcpy(psz, pszName, sizeof(psz));
- if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
- {
- pszHost = psz+1;
- psz[strlen(psz)-1] = 0;
- }
- return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
- }
- bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
- {
- return LookupHost(pszName, vIP, nMaxSolutions, false);
- }
- bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
- {
- if (pszName[0] == 0)
- return false;
- int port = portDefault;
- std::string hostname = "";
- SplitHostPort(std::string(pszName), port, hostname);
- std::vector<CNetAddr> vIP;
- bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
- if (!fRet)
- return false;
- vAddr.resize(vIP.size());
- for (unsigned int i = 0; i < vIP.size(); i++)
- vAddr[i] = CService(vIP[i], port);
- return true;
- }
- bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
- {
- std::vector<CService> vService;
- bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
- if (!fRet)
- return false;
- addr = vService[0];
- return true;
- }
- bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
- {
- return Lookup(pszName, addr, portDefault, false);
- }
- bool static Socks4(const CService &addrDest, SOCKET& hSocket)
- {
- printf("SOCKS4 connecting %s\n", addrDest.ToString().c_str());
- if (!addrDest.IsIPv4())
- {
- closesocket(hSocket);
- return error("Proxy destination is not IPv4");
- }
- char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
- struct sockaddr_in addr;
- socklen_t len = sizeof(addr);
- if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET)
- {
- closesocket(hSocket);
- return error("Cannot get proxy destination address");
- }
- memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
- memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
- char* pszSocks4 = pszSocks4IP;
- int nSize = sizeof(pszSocks4IP);
- int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
- if (ret != nSize)
- {
- closesocket(hSocket);
- return error("Error sending to proxy");
- }
- char pchRet[8];
- if (recv(hSocket, pchRet, 8, 0) != 8)
- {
- closesocket(hSocket);
- return error("Error reading proxy response");
- }
- if (pchRet[1] != 0x5a)
- {
- closesocket(hSocket);
- if (pchRet[1] != 0x5b)
- printf("ERROR: Proxy returned error %d\n", pchRet[1]);
- return false;
- }
- printf("SOCKS4 connected %s\n", addrDest.ToString().c_str());
- return true;
- }
- bool static Socks5(string strDest, int port, SOCKET& hSocket)
- {
- printf("SOCKS5 connecting %s\n", strDest.c_str());
- if (strDest.size() > 255)
- {
- closesocket(hSocket);
- return error("Hostname too long");
- }
- char pszSocks5Init[] = "\5\1\0";
- char *pszSocks5 = pszSocks5Init;
- ssize_t nSize = sizeof(pszSocks5Init) - 1;
- ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
- if (ret != nSize)
- {
- closesocket(hSocket);
- return error("Error sending to proxy");
- }
- char pchRet1[2];
- if (recv(hSocket, pchRet1, 2, 0) != 2)
- {
- closesocket(hSocket);
- return error("Error reading proxy response");
- }
- if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00)
- {
- closesocket(hSocket);
- return error("Proxy failed to initialize");
- }
- string strSocks5("\5\1");
- strSocks5 += '\000'; strSocks5 += '\003';
- strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255));
- strSocks5 += strDest;
- strSocks5 += static_cast<char>((port >> 8) & 0xFF);
- strSocks5 += static_cast<char>((port >> 0) & 0xFF);
- ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
- if (ret != (ssize_t)strSocks5.size())
- {
- closesocket(hSocket);
- return error("Error sending to proxy");
- }
- char pchRet2[4];
- if (recv(hSocket, pchRet2, 4, 0) != 4)
- {
- closesocket(hSocket);
- return error("Error reading proxy response");
- }
- if (pchRet2[0] != 0x05)
- {
- closesocket(hSocket);
- return error("Proxy failed to accept request");
- }
- if (pchRet2[1] != 0x00)
- {
- closesocket(hSocket);
- switch (pchRet2[1])
- {
- case 0x01: return error("Proxy error: general failure");
- case 0x02: return error("Proxy error: connection not allowed");
- case 0x03: return error("Proxy error: network unreachable");
- case 0x04: return error("Proxy error: host unreachable");
- case 0x05: return error("Proxy error: connection refused");
- case 0x06: return error("Proxy error: TTL expired");
- case 0x07: return error("Proxy error: protocol error");
- case 0x08: return error("Proxy error: address type not supported");
- default: return error("Proxy error: unknown");
- }
- }
- if (pchRet2[2] != 0x00)
- {
- closesocket(hSocket);
- return error("Error: malformed proxy response");
- }
- char pchRet3[256];
- switch (pchRet2[3])
- {
- case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break;
- case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break;
- case 0x03:
- {
- ret = recv(hSocket, pchRet3, 1, 0) != 1;
- if (ret)
- return error("Error reading from proxy");
- int nRecv = pchRet3[0];
- ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv;
- break;
- }
- default: closesocket(hSocket); return error("Error: malformed proxy response");
- }
- if (ret)
- {
- closesocket(hSocket);
- return error("Error reading from proxy");
- }
- if (recv(hSocket, pchRet3, 2, 0) != 2)
- {
- closesocket(hSocket);
- return error("Error reading from proxy");
- }
- printf("SOCKS5 connected %s\n", strDest.c_str());
- return true;
- }
- bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout)
- {
- hSocketRet = INVALID_SOCKET;
- #ifdef USE_IPV6
- struct sockaddr_storage sockaddr;
- #else
- struct sockaddr sockaddr;
- #endif
- socklen_t len = sizeof(sockaddr);
- if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
- printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
- return false;
- }
- SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
- if (hSocket == INVALID_SOCKET)
- return false;
- #ifdef SO_NOSIGPIPE
- int set = 1;
- setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
- #endif
- #ifdef WIN32
- u_long fNonblock = 1;
- if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
- #else
- int fFlags = fcntl(hSocket, F_GETFL, 0);
- if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
- #endif
- {
- closesocket(hSocket);
- return false;
- }
- if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
- {
- // WSAEINVAL is here because some legacy version of winsock uses it
- if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
- {
- struct timeval timeout;
- timeout.tv_sec = nTimeout / 1000;
- timeout.tv_usec = (nTimeout % 1000) * 1000;
- fd_set fdset;
- FD_ZERO(&fdset);
- FD_SET(hSocket, &fdset);
- int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
- if (nRet == 0)
- {
- printf("connection timeout\n");
- closesocket(hSocket);
- return false;
- }
- if (nRet == SOCKET_ERROR)
- {
- printf("select() for connection failed: %i\n",WSAGetLastError());
- closesocket(hSocket);
- return false;
- }
- socklen_t nRetSize = sizeof(nRet);
- #ifdef WIN32
- if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
- #else
- if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
- #endif
- {
- printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
- closesocket(hSocket);
- return false;
- }
- if (nRet != 0)
- {
- printf("connect() failed after select(): %s\n",strerror(nRet));
- closesocket(hSocket);
- return false;
- }
- }
- #ifdef WIN32
- else if (WSAGetLastError() != WSAEISCONN)
- #else
- else
- #endif
- {
- printf("connect() failed: %i\n",WSAGetLastError());
- closesocket(hSocket);
- return false;
- }
- }
- #ifdef WIN32
- fNonblock = 0;
- if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
- #else
- fFlags = fcntl(hSocket, F_GETFL, 0);
- if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
- #endif
- {
- closesocket(hSocket);
- return false;
- }
- hSocketRet = hSocket;
- return true;
- }
- bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) {
- assert(net >= 0 && net < NET_MAX);
- if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5)
- return false;
- if (nSocksVersion != 0 && !addrProxy.IsValid())
- return false;
- LOCK(cs_proxyInfos);
- proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion);
- return true;
- }
- bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
- assert(net >= 0 && net < NET_MAX);
- LOCK(cs_proxyInfos);
- if (!proxyInfo[net].second)
- return false;
- proxyInfoOut = proxyInfo[net];
- return true;
- }
- bool SetNameProxy(CService addrProxy, int nSocksVersion) {
- if (nSocksVersion != 0 && nSocksVersion != 5)
- return false;
- if (nSocksVersion != 0 && !addrProxy.IsValid())
- return false;
- LOCK(cs_proxyInfos);
- nameproxyInfo = std::make_pair(addrProxy, nSocksVersion);
- return true;
- }
- bool GetNameProxy(proxyType &nameproxyInfoOut) {
- LOCK(cs_proxyInfos);
- if (!nameproxyInfo.second)
- return false;
- nameproxyInfoOut = nameproxyInfo;
- return true;
- }
- bool HaveNameProxy() {
- LOCK(cs_proxyInfos);
- return nameproxyInfo.second != 0;
- }
- bool IsProxy(const CNetAddr &addr) {
- LOCK(cs_proxyInfos);
- for (int i = 0; i < NET_MAX; i++) {
- if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first))
- return true;
- }
- return false;
- }
- bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
- {
- proxyType proxy;
- // no proxy needed
- if (!GetProxy(addrDest.GetNetwork(), proxy))
- return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout);
- SOCKET hSocket = INVALID_SOCKET;
- // first connect to proxy server
- if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout))
- return false;
- // do socks negotiation
- switch (proxy.second) {
- case 4:
- if (!Socks4(addrDest, hSocket))
- return false;
- break;
- case 5:
- if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket))
- return false;
- break;
- default:
- return false;
- }
- hSocketRet = hSocket;
- return true;
- }
- bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout)
- {
- string strDest;
- int port = portDefault;
- SplitHostPort(string(pszDest), port, strDest);
- SOCKET hSocket = INVALID_SOCKET;
- proxyType nameproxy;
- GetNameProxy(nameproxy);
- CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port);
- if (addrResolved.IsValid()) {
- addr = addrResolved;
- return ConnectSocket(addr, hSocketRet, nTimeout);
- }
- addr = CService("0.0.0.0:0");
- if (!nameproxy.second)
- return false;
- if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout))
- return false;
- switch(nameproxy.second) {
- default:
- case 4: return false;
- case 5:
- if (!Socks5(strDest, port, hSocket))
- return false;
- break;
- }
- hSocketRet = hSocket;
- return true;
- }
- void CNetAddr::Init()
- {
- memset(ip, 0, 16);
- }
- void CNetAddr::SetIP(const CNetAddr& ipIn)
- {
- memcpy(ip, ipIn.ip, sizeof(ip));
- }
- static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
- static const unsigned char pchGarliCat[] = {0xFD,0x60,0xDB,0x4D,0xDD,0xB5};
- 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;
- }
- if (strName.size()>11 && strName.substr(strName.size() - 11, 11) == ".oc.b32.i2p") {
- std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 11).c_str());
- if (vchAddr.size() != 16-sizeof(pchGarliCat))
- return false;
- memcpy(ip, pchOnionCat, sizeof(pchGarliCat));
- for (unsigned int i=0; i<16-sizeof(pchGarliCat); i++)
- ip[i + sizeof(pchGarliCat)] = 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() && !IsI2P());
- }
- 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::IsI2P() const
- {
- return (memcmp(ip, pchGarliCat, sizeof(pchGarliCat)) == 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
- {
- 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() && !IsI2P()) || IsRFC4843() || IsLocal());
- }
- enum Network CNetAddr::GetNetwork() const
- {
- if (!IsRoutable())
- return NET_UNROUTABLE;
- if (IsIPv4())
- return NET_IPV4;
- if (IsTor())
- return NET_TOR;
- if (IsI2P())
- return NET_I2P;
- return NET_IPV6;
- }
- std::string CNetAddr::ToStringIP() const
- {
- if (IsTor())
- return EncodeBase32(&ip[6], 10) + ".onion";
- if (IsI2P())
- return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
- 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
- std::vector<unsigned char> CNetAddr::GetGroup() const
- {
- std::vector<unsigned char> vchRet;
- int nClass = NET_IPV6;
- int nStartByte = 0;
- int nBits = 16;
- if (IsLocal())
- {
- nClass = 255;
- nBits = 0;
- }
- if (!IsRoutable())
- {
- nClass = NET_UNROUTABLE;
- nBits = 0;
- }
- else if (IsIPv4() || IsRFC6145() || IsRFC6052())
- {
- nClass = NET_IPV4;
- nStartByte = 12;
- }
- else if (IsRFC3964())
- {
- nClass = NET_IPV4;
- nStartByte = 2;
- }
- 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;
- }
- else if (IsI2P())
- {
- nClass = NET_I2P;
- nStartByte = 6;
- nBits = 4;
- }
- else if (GetByte(15) == 0x20 && GetByte(14) == 0x11 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
- nBits = 36;
- 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
- {
- printf("CNetAddr(%s)\n", ToString().c_str());
- }
- 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();
- }
- 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_I2P:
- switch(ourNet) {
- default: return REACH_DEFAULT;
- case NET_I2P: 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_I2P: return REACH_PRIVATE; // assume connections from unroutable addresses are
- case NET_TOR: return REACH_PRIVATE; // either from Tor/I2P, 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() || IsI2P()) {
- return ToStringIP() + ":" + ToStringPort();
- } else {
- return "[" + ToStringIP() + "]:" + ToStringPort();
- }
- }
- std::string CService::ToString() const
- {
- return ToStringIPPort();
- }
- void CService::print() const
- {
- printf("CService(%s)\n", ToString().c_str());
- }
- void CService::SetPort(unsigned short portIn)
- {
- port = portIn;
- }
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