1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2012 The Bitcoin developers
3 // Distributed under the MIT/X11 software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
11 #include <sys/fcntl.h>
15 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
20 static proxyType proxyInfo[NET_MAX];
21 static proxyType nameproxyInfo;
22 static CCriticalSection cs_proxyInfos;
23 int nConnectTimeout = 5000;
24 bool fNameLookup = false;
26 static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
28 enum Network ParseNetwork(std::string net) {
30 if (net == "ipv4") return NET_IPV4;
31 if (net == "ipv6") return NET_IPV6;
32 if (net == "tor") return NET_TOR;
33 if (net == "i2p") return NET_I2P;
34 return NET_UNROUTABLE;
37 void SplitHostPort(std::string in, int &portOut, std::string &hostOut) {
38 size_t colon = in.find_last_of(':');
39 // if a : is found, and it either follows a [...], or no other : is in the string, treat it as port separator
40 bool fHaveColon = colon != in.npos;
41 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
42 bool fMultiColon = fHaveColon && (in.find_last_of(':',colon-1) != in.npos);
43 if (fHaveColon && (colon==0 || fBracketed || !fMultiColon)) {
45 int n = strtol(in.c_str() + colon + 1, &endp, 10);
46 if (endp && *endp == 0 && n >= 0) {
47 in = in.substr(0, colon);
48 if (n > 0 && n < 0x10000)
52 if (in.size()>0 && in[0] == '[' && in[in.size()-1] == ']')
53 hostOut = in.substr(1, in.size()-2);
58 bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
64 if (addr.SetSpecial(std::string(pszName))) {
70 struct addrinfo aiHint;
71 memset(&aiHint, 0, sizeof(struct addrinfo));
73 aiHint.ai_socktype = SOCK_STREAM;
74 aiHint.ai_protocol = IPPROTO_TCP;
77 aiHint.ai_family = AF_UNSPEC;
79 aiHint.ai_family = AF_INET;
81 aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
84 aiHint.ai_family = AF_UNSPEC;
86 aiHint.ai_family = AF_INET;
88 aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
90 struct addrinfo *aiRes = NULL;
91 int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
95 struct addrinfo *aiTrav = aiRes;
96 while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions))
98 if (aiTrav->ai_family == AF_INET)
100 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
101 vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
105 if (aiTrav->ai_family == AF_INET6)
107 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
108 vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
112 aiTrav = aiTrav->ai_next;
117 return (vIP.size() > 0);
120 bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
126 strlcpy(psz, pszName, sizeof(psz));
127 if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
130 psz[strlen(psz)-1] = 0;
133 return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
136 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
138 return LookupHost(pszName, vIP, nMaxSolutions, false);
141 bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
145 int port = portDefault;
146 std::string hostname = "";
147 SplitHostPort(std::string(pszName), port, hostname);
149 std::vector<CNetAddr> vIP;
150 bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
153 vAddr.resize(vIP.size());
154 for (unsigned int i = 0; i < vIP.size(); i++)
155 vAddr[i] = CService(vIP[i], port);
159 bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
161 std::vector<CService> vService;
162 bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
169 bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
171 return Lookup(pszName, addr, portDefault, false);
174 bool static Socks4(const CService &addrDest, SOCKET& hSocket)
176 printf("SOCKS4 connecting %s\n", addrDest.ToString().c_str());
177 if (!addrDest.IsIPv4())
179 closesocket(hSocket);
180 return error("Proxy destination is not IPv4");
182 char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
183 struct sockaddr_in addr;
184 socklen_t len = sizeof(addr);
185 if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET)
187 closesocket(hSocket);
188 return error("Cannot get proxy destination address");
190 memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
191 memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
192 char* pszSocks4 = pszSocks4IP;
193 int nSize = sizeof(pszSocks4IP);
195 int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
198 closesocket(hSocket);
199 return error("Error sending to proxy");
202 if (recv(hSocket, pchRet, 8, 0) != 8)
204 closesocket(hSocket);
205 return error("Error reading proxy response");
207 if (pchRet[1] != 0x5a)
209 closesocket(hSocket);
210 if (pchRet[1] != 0x5b)
211 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
214 printf("SOCKS4 connected %s\n", addrDest.ToString().c_str());
218 bool static Socks5(string strDest, int port, SOCKET& hSocket)
220 printf("SOCKS5 connecting %s\n", strDest.c_str());
221 if (strDest.size() > 255)
223 closesocket(hSocket);
224 return error("Hostname too long");
226 char pszSocks5Init[] = "\5\1\0";
227 char *pszSocks5 = pszSocks5Init;
228 ssize_t nSize = sizeof(pszSocks5Init) - 1;
230 ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
233 closesocket(hSocket);
234 return error("Error sending to proxy");
237 if (recv(hSocket, pchRet1, 2, 0) != 2)
239 closesocket(hSocket);
240 return error("Error reading proxy response");
242 if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00)
244 closesocket(hSocket);
245 return error("Proxy failed to initialize");
247 string strSocks5("\5\1");
248 strSocks5 += '\000'; strSocks5 += '\003';
249 strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255));
250 strSocks5 += strDest;
251 strSocks5 += static_cast<char>((port >> 8) & 0xFF);
252 strSocks5 += static_cast<char>((port >> 0) & 0xFF);
253 ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
254 if (ret != (ssize_t)strSocks5.size())
256 closesocket(hSocket);
257 return error("Error sending to proxy");
260 if (recv(hSocket, pchRet2, 4, 0) != 4)
262 closesocket(hSocket);
263 return error("Error reading proxy response");
265 if (pchRet2[0] != 0x05)
267 closesocket(hSocket);
268 return error("Proxy failed to accept request");
270 if (pchRet2[1] != 0x00)
272 closesocket(hSocket);
275 case 0x01: return error("Proxy error: general failure");
276 case 0x02: return error("Proxy error: connection not allowed");
277 case 0x03: return error("Proxy error: network unreachable");
278 case 0x04: return error("Proxy error: host unreachable");
279 case 0x05: return error("Proxy error: connection refused");
280 case 0x06: return error("Proxy error: TTL expired");
281 case 0x07: return error("Proxy error: protocol error");
282 case 0x08: return error("Proxy error: address type not supported");
283 default: return error("Proxy error: unknown");
286 if (pchRet2[2] != 0x00)
288 closesocket(hSocket);
289 return error("Error: malformed proxy response");
294 case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break;
295 case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break;
298 ret = recv(hSocket, pchRet3, 1, 0) != 1;
300 return error("Error reading from proxy");
301 int nRecv = pchRet3[0];
302 ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv;
305 default: closesocket(hSocket); return error("Error: malformed proxy response");
309 closesocket(hSocket);
310 return error("Error reading from proxy");
312 if (recv(hSocket, pchRet3, 2, 0) != 2)
314 closesocket(hSocket);
315 return error("Error reading from proxy");
317 printf("SOCKS5 connected %s\n", strDest.c_str());
321 bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout)
323 hSocketRet = INVALID_SOCKET;
326 struct sockaddr_storage sockaddr;
328 struct sockaddr sockaddr;
330 socklen_t len = sizeof(sockaddr);
331 if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
332 printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
336 SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
337 if (hSocket == INVALID_SOCKET)
341 setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
345 u_long fNonblock = 1;
346 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
348 int fFlags = fcntl(hSocket, F_GETFL, 0);
349 if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
352 closesocket(hSocket);
356 if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
358 // WSAEINVAL is here because some legacy version of winsock uses it
359 if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
361 struct timeval timeout;
362 timeout.tv_sec = nTimeout / 1000;
363 timeout.tv_usec = (nTimeout % 1000) * 1000;
367 FD_SET(hSocket, &fdset);
368 int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
371 printf("connection timeout\n");
372 closesocket(hSocket);
375 if (nRet == SOCKET_ERROR)
377 printf("select() for connection failed: %i\n",WSAGetLastError());
378 closesocket(hSocket);
381 socklen_t nRetSize = sizeof(nRet);
383 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
385 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
388 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
389 closesocket(hSocket);
394 printf("connect() failed after select(): %s\n",strerror(nRet));
395 closesocket(hSocket);
400 else if (WSAGetLastError() != WSAEISCONN)
405 printf("connect() failed: %i\n",WSAGetLastError());
406 closesocket(hSocket);
411 // this isn't even strictly necessary
412 // CNode::ConnectNode immediately turns the socket back to non-blocking
413 // but we'll turn it back to blocking just in case
416 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
418 fFlags = fcntl(hSocket, F_GETFL, 0);
419 if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
422 closesocket(hSocket);
426 hSocketRet = hSocket;
430 bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) {
431 assert(net >= 0 && net < NET_MAX);
432 if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5)
434 if (nSocksVersion != 0 && !addrProxy.IsValid())
437 proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion);
441 bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
442 assert(net >= 0 && net < NET_MAX);
444 if (!proxyInfo[net].second)
446 proxyInfoOut = proxyInfo[net];
450 bool SetNameProxy(CService addrProxy, int nSocksVersion) {
451 if (nSocksVersion != 0 && nSocksVersion != 5)
453 if (nSocksVersion != 0 && !addrProxy.IsValid())
456 nameproxyInfo = std::make_pair(addrProxy, nSocksVersion);
460 bool GetNameProxy(proxyType &nameproxyInfoOut) {
462 if (!nameproxyInfo.second)
464 nameproxyInfoOut = nameproxyInfo;
468 bool HaveNameProxy() {
470 return nameproxyInfo.second != 0;
473 bool IsProxy(const CNetAddr &addr) {
475 for (int i = 0; i < NET_MAX; i++) {
476 if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first))
482 bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
487 if (!GetProxy(addrDest.GetNetwork(), proxy))
488 return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout);
490 SOCKET hSocket = INVALID_SOCKET;
492 // first connect to proxy server
493 if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout))
496 // do socks negotiation
497 switch (proxy.second) {
499 if (!Socks4(addrDest, hSocket))
503 if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket))
510 hSocketRet = hSocket;
514 bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout)
517 int port = portDefault;
518 SplitHostPort(string(pszDest), port, strDest);
520 SOCKET hSocket = INVALID_SOCKET;
523 GetNameProxy(nameproxy);
525 CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port);
526 if (addrResolved.IsValid()) {
528 return ConnectSocket(addr, hSocketRet, nTimeout);
530 addr = CService("0.0.0.0:0");
531 if (!nameproxy.second)
533 if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout))
536 switch(nameproxy.second) {
538 case 4: return false;
540 if (!Socks5(strDest, port, hSocket))
545 hSocketRet = hSocket;
549 void CNetAddr::Init()
554 void CNetAddr::SetIP(const CNetAddr& ipIn)
556 memcpy(ip, ipIn.ip, sizeof(ip));
559 static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
560 static const unsigned char pchGarliCat[] = {0xFD,0x60,0xDB,0x4D,0xDD,0xB5};
562 bool CNetAddr::SetSpecial(const std::string &strName)
564 if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
565 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
566 if (vchAddr.size() != 16-sizeof(pchOnionCat))
568 memcpy(ip, pchOnionCat, sizeof(pchOnionCat));
569 for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++)
570 ip[i + sizeof(pchOnionCat)] = vchAddr[i];
573 if (strName.size()>11 && strName.substr(strName.size() - 11, 11) == ".oc.b32.i2p") {
574 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 11).c_str());
575 if (vchAddr.size() != 16-sizeof(pchGarliCat))
577 memcpy(ip, pchOnionCat, sizeof(pchGarliCat));
578 for (unsigned int i=0; i<16-sizeof(pchGarliCat); i++)
579 ip[i + sizeof(pchGarliCat)] = vchAddr[i];
590 CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
592 memcpy(ip, pchIPv4, 12);
593 memcpy(ip+12, &ipv4Addr, 4);
597 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
599 memcpy(ip, &ipv6Addr, 16);
603 CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
606 std::vector<CNetAddr> vIP;
607 if (LookupHost(pszIp, vIP, 1, fAllowLookup))
611 CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
614 std::vector<CNetAddr> vIP;
615 if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
619 unsigned int CNetAddr::GetByte(int n) const
624 bool CNetAddr::IsIPv4() const
626 return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
629 bool CNetAddr::IsIPv6() const
631 return (!IsIPv4() && !IsTor() && !IsI2P());
634 bool CNetAddr::IsRFC1918() const
638 (GetByte(3) == 192 && GetByte(2) == 168) ||
639 (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
642 bool CNetAddr::IsRFC3927() const
644 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
647 bool CNetAddr::IsRFC3849() const
649 return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
652 bool CNetAddr::IsRFC3964() const
654 return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
657 bool CNetAddr::IsRFC6052() const
659 static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
660 return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
663 bool CNetAddr::IsRFC4380() const
665 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
668 bool CNetAddr::IsRFC4862() const
670 static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
671 return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
674 bool CNetAddr::IsRFC4193() const
676 return ((GetByte(15) & 0xFE) == 0xFC);
679 bool CNetAddr::IsRFC6145() const
681 static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
682 return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
685 bool CNetAddr::IsRFC4843() const
687 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
690 bool CNetAddr::IsTor() const
692 return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
695 bool CNetAddr::IsI2P() const
697 return (memcmp(ip, pchGarliCat, sizeof(pchGarliCat)) == 0);
700 bool CNetAddr::IsLocal() const
703 if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
706 // IPv6 loopback (::1/128)
707 static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
708 if (memcmp(ip, pchLocal, 16) == 0)
714 bool CNetAddr::IsMulticast() const
716 return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
717 || (GetByte(15) == 0xFF);
720 bool CNetAddr::IsValid() const
722 // Cleanup 3-byte shifted addresses caused by garbage in size field
723 // of addr messages from versions before 0.2.9 checksum.
724 // Two consecutive addr messages look like this:
725 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
726 // so if the first length field is garbled, it reads the second batch
727 // of addr misaligned by 3 bytes.
728 if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
731 // unspecified IPv6 address (::/128)
732 unsigned char ipNone[16] = {};
733 if (memcmp(ip, ipNone, 16) == 0)
736 // documentation IPv6 address
743 uint32_t ipNone = INADDR_NONE;
744 if (memcmp(ip+12, &ipNone, 4) == 0)
749 if (memcmp(ip+12, &ipNone, 4) == 0)
756 bool CNetAddr::IsRoutable() const
758 return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || (IsRFC4193() && !IsTor() && !IsI2P()) || IsRFC4843() || IsLocal());
761 enum Network CNetAddr::GetNetwork() const
764 return NET_UNROUTABLE;
778 std::string CNetAddr::ToStringIP() const
781 return EncodeBase32(&ip[6], 10) + ".onion";
783 return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
784 CService serv(*this, 0);
786 struct sockaddr_storage sockaddr;
788 struct sockaddr sockaddr;
790 socklen_t socklen = sizeof(sockaddr);
791 if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
792 char name[1025] = "";
793 if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST))
794 return std::string(name);
797 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
799 return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
800 GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
801 GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
802 GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
803 GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
806 std::string CNetAddr::ToString() const
811 bool operator==(const CNetAddr& a, const CNetAddr& b)
813 return (memcmp(a.ip, b.ip, 16) == 0);
816 bool operator!=(const CNetAddr& a, const CNetAddr& b)
818 return (memcmp(a.ip, b.ip, 16) != 0);
821 bool operator<(const CNetAddr& a, const CNetAddr& b)
823 return (memcmp(a.ip, b.ip, 16) < 0);
826 bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
830 memcpy(pipv4Addr, ip+12, 4);
835 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
837 memcpy(pipv6Addr, ip, 16);
842 // get canonical identifier of an address' group
843 // no two connections will be attempted to addresses with the same group
844 std::vector<unsigned char> CNetAddr::GetGroup() const
846 std::vector<unsigned char> vchRet;
847 int nClass = NET_IPV6;
851 // all local addresses belong to the same group
858 // all unroutable addresses belong to the same group
861 nClass = NET_UNROUTABLE;
864 // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
865 // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
866 else if (IsIPv4() || IsRFC6145() || IsRFC6052())
871 // for 6to4 tunnelled addresses, use the encapsulated IPv4 address
872 else if (IsRFC3964())
877 // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
878 else if (IsRFC4380())
880 vchRet.push_back(NET_IPV4);
881 vchRet.push_back(GetByte(3) ^ 0xFF);
882 vchRet.push_back(GetByte(2) ^ 0xFF);
897 // for he.net, use /36 groups
898 else if (GetByte(15) == 0x20 && GetByte(14) == 0x11 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
900 // for the rest of the IPv6 network, use /32 groups
904 vchRet.push_back(nClass);
907 vchRet.push_back(GetByte(15 - nStartByte));
912 vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
917 uint64 CNetAddr::GetHash() const
919 uint256 hash = Hash(&ip[0], &ip[16]);
921 memcpy(&nRet, &hash, sizeof(nRet));
925 void CNetAddr::print() const
927 printf("CNetAddr(%s)\n", ToString().c_str());
930 // private extensions to enum Network, only returned by GetExtNetwork,
931 // and only used in GetReachabilityFrom
932 static const int NET_UNKNOWN = NET_MAX + 0;
933 static const int NET_TEREDO = NET_MAX + 1;
934 int static GetExtNetwork(const CNetAddr *addr)
938 if (addr->IsRFC4380())
940 return addr->GetNetwork();
943 /** Calculates a metric for how reachable (*this) is from a given partner */
944 int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const
957 return REACH_UNREACHABLE;
959 int ourNet = GetExtNetwork(this);
960 int theirNet = GetExtNetwork(paddrPartner);
961 bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145();
966 default: return REACH_DEFAULT;
967 case NET_IPV4: return REACH_IPV4;
971 default: return REACH_DEFAULT;
972 case NET_TEREDO: return REACH_TEREDO;
973 case NET_IPV4: return REACH_IPV4;
974 case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled
978 default: return REACH_DEFAULT;
979 case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well
980 case NET_TOR: return REACH_PRIVATE;
984 default: return REACH_DEFAULT;
985 case NET_I2P: return REACH_PRIVATE;
989 default: return REACH_DEFAULT;
990 case NET_TEREDO: return REACH_TEREDO;
991 case NET_IPV6: return REACH_IPV6_WEAK;
992 case NET_IPV4: return REACH_IPV4;
998 default: return REACH_DEFAULT;
999 case NET_TEREDO: return REACH_TEREDO;
1000 case NET_IPV6: return REACH_IPV6_WEAK;
1001 case NET_IPV4: return REACH_IPV4;
1002 case NET_I2P: return REACH_PRIVATE; // assume connections from unroutable addresses are
1003 case NET_TOR: return REACH_PRIVATE; // either from Tor/I2P, or don't care about our address
1008 void CService::Init()
1013 CService::CService()
1018 CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
1022 CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
1027 CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
1032 CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
1034 assert(addr.sin_family == AF_INET);
1038 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
1040 assert(addr.sin6_family == AF_INET6);
1044 bool CService::SetSockAddr(const struct sockaddr *paddr)
1046 switch (paddr->sa_family) {
1048 *this = CService(*(const struct sockaddr_in*)paddr);
1052 *this = CService(*(const struct sockaddr_in6*)paddr);
1060 CService::CService(const char *pszIpPort, bool fAllowLookup)
1064 if (Lookup(pszIpPort, ip, 0, fAllowLookup))
1068 CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup)
1072 if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
1076 CService::CService(const std::string &strIpPort, bool fAllowLookup)
1080 if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
1084 CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup)
1088 if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
1092 unsigned short CService::GetPort() const
1097 bool operator==(const CService& a, const CService& b)
1099 return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
1102 bool operator!=(const CService& a, const CService& b)
1104 return (CNetAddr)a != (CNetAddr)b || a.port != b.port;
1107 bool operator<(const CService& a, const CService& b)
1109 return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
1112 bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
1115 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in))
1117 *addrlen = sizeof(struct sockaddr_in);
1118 struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr;
1119 memset(paddrin, 0, *addrlen);
1120 if (!GetInAddr(&paddrin->sin_addr))
1122 paddrin->sin_family = AF_INET;
1123 paddrin->sin_port = htons(port);
1128 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
1130 *addrlen = sizeof(struct sockaddr_in6);
1131 struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr;
1132 memset(paddrin6, 0, *addrlen);
1133 if (!GetIn6Addr(&paddrin6->sin6_addr))
1135 paddrin6->sin6_family = AF_INET6;
1136 paddrin6->sin6_port = htons(port);
1143 std::vector<unsigned char> CService::GetKey() const
1145 std::vector<unsigned char> vKey;
1147 memcpy(&vKey[0], ip, 16);
1148 vKey[16] = port / 0x100;
1149 vKey[17] = port & 0x0FF;
1153 std::string CService::ToStringPort() const
1155 return strprintf("%u", port);
1158 std::string CService::ToStringIPPort() const
1160 if (IsIPv4() || IsTor() || IsI2P()) {
1161 return ToStringIP() + ":" + ToStringPort();
1163 return "[" + ToStringIP() + "]:" + ToStringPort();
1167 std::string CService::ToString() const
1169 return ToStringIPPort();
1172 void CService::print() const
1174 printf("CService(%s)\n", ToString().c_str());
1177 void CService::SetPort(unsigned short portIn)