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.
12 #include <sys/fcntl.h>
16 #define ssize_t size_t
20 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
25 static proxyType proxyInfo[NET_MAX];
26 static proxyType nameproxyInfo;
27 static CCriticalSection cs_proxyInfos;
28 int nConnectTimeout = 5000;
29 bool fNameLookup = false;
31 static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
33 enum Network ParseNetwork(std::string net) {
35 if (net == "ipv4") return NET_IPV4;
36 if (net == "ipv6") return NET_IPV6;
37 if (net == "tor") return NET_TOR;
38 if (net == "i2p") return NET_I2P;
39 return NET_UNROUTABLE;
42 void SplitHostPort(std::string in, int &portOut, std::string &hostOut) {
43 size_t colon = in.find_last_of(':');
44 // if a : is found, and it either follows a [...], or no other : is in the string, treat it as port separator
45 bool fHaveColon = colon != in.npos;
46 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
47 bool fMultiColon = fHaveColon && (in.find_last_of(':',colon-1) != in.npos);
48 if (fHaveColon && (colon==0 || fBracketed || !fMultiColon)) {
50 int n = strtol(in.c_str() + colon + 1, &endp, 10);
51 if (endp && *endp == 0 && n >= 0) {
52 in = in.substr(0, colon);
53 if (n > 0 && n < 0x10000)
57 if (in.size()>0 && in[0] == '[' && in[in.size()-1] == ']')
58 hostOut = in.substr(1, in.size()-2);
63 bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
69 if (addr.SetSpecial(std::string(pszName))) {
75 struct addrinfo aiHint;
76 memset(&aiHint, 0, sizeof(struct addrinfo));
78 aiHint.ai_socktype = SOCK_STREAM;
79 aiHint.ai_protocol = IPPROTO_TCP;
82 aiHint.ai_family = AF_UNSPEC;
84 aiHint.ai_family = AF_INET;
86 aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
89 aiHint.ai_family = AF_UNSPEC;
91 aiHint.ai_family = AF_INET;
93 aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
95 struct addrinfo *aiRes = NULL;
96 int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
100 struct addrinfo *aiTrav = aiRes;
101 while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions))
103 if (aiTrav->ai_family == AF_INET)
105 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
106 vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
110 if (aiTrav->ai_family == AF_INET6)
112 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
113 vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
117 aiTrav = aiTrav->ai_next;
122 return (vIP.size() > 0);
125 bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
131 strlcpy(psz, pszName, sizeof(psz));
132 if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
135 psz[strlen(psz)-1] = 0;
138 return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
141 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
143 return LookupHost(pszName, vIP, nMaxSolutions, false);
146 bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
150 int port = portDefault;
151 std::string hostname = "";
152 SplitHostPort(std::string(pszName), port, hostname);
154 std::vector<CNetAddr> vIP;
155 bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
158 vAddr.resize(vIP.size());
159 for (unsigned int i = 0; i < vIP.size(); i++)
160 vAddr[i] = CService(vIP[i], port);
164 bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
166 std::vector<CService> vService;
167 bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
174 bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
176 return Lookup(pszName, addr, portDefault, false);
179 bool static Socks4(const CService &addrDest, SOCKET& hSocket)
181 printf("SOCKS4 connecting %s\n", addrDest.ToString().c_str());
182 if (!addrDest.IsIPv4())
184 closesocket(hSocket);
185 return error("Proxy destination is not IPv4");
187 char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
188 struct sockaddr_in addr;
189 socklen_t len = sizeof(addr);
190 if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET)
192 closesocket(hSocket);
193 return error("Cannot get proxy destination address");
195 memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
196 memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
197 char* pszSocks4 = pszSocks4IP;
198 int nSize = sizeof(pszSocks4IP);
200 int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
203 closesocket(hSocket);
204 return error("Error sending to proxy");
207 if (recv(hSocket, pchRet, 8, 0) != 8)
209 closesocket(hSocket);
210 return error("Error reading proxy response");
212 if (pchRet[1] != 0x5a)
214 closesocket(hSocket);
215 if (pchRet[1] != 0x5b)
216 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
219 printf("SOCKS4 connected %s\n", addrDest.ToString().c_str());
223 bool static Socks5(string strDest, int port, SOCKET& hSocket)
225 printf("SOCKS5 connecting %s\n", strDest.c_str());
226 if (strDest.size() > 255)
228 closesocket(hSocket);
229 return error("Hostname too long");
231 char pszSocks5Init[] = "\5\1\0";
232 char *pszSocks5 = pszSocks5Init;
233 ssize_t nSize = sizeof(pszSocks5Init) - 1;
235 ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
238 closesocket(hSocket);
239 return error("Error sending to proxy");
242 if (recv(hSocket, pchRet1, 2, 0) != 2)
244 closesocket(hSocket);
245 return error("Error reading proxy response");
247 if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00)
249 closesocket(hSocket);
250 return error("Proxy failed to initialize");
252 string strSocks5("\5\1");
253 strSocks5 += '\000'; strSocks5 += '\003';
254 strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255));
255 strSocks5 += strDest;
256 strSocks5 += static_cast<char>((port >> 8) & 0xFF);
257 strSocks5 += static_cast<char>((port >> 0) & 0xFF);
258 ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
259 if (ret != (ssize_t)strSocks5.size())
261 closesocket(hSocket);
262 return error("Error sending to proxy");
265 if (recv(hSocket, pchRet2, 4, 0) != 4)
267 closesocket(hSocket);
268 return error("Error reading proxy response");
270 if (pchRet2[0] != 0x05)
272 closesocket(hSocket);
273 return error("Proxy failed to accept request");
275 if (pchRet2[1] != 0x00)
277 closesocket(hSocket);
280 case 0x01: return error("Proxy error: general failure");
281 case 0x02: return error("Proxy error: connection not allowed");
282 case 0x03: return error("Proxy error: network unreachable");
283 case 0x04: return error("Proxy error: host unreachable");
284 case 0x05: return error("Proxy error: connection refused");
285 case 0x06: return error("Proxy error: TTL expired");
286 case 0x07: return error("Proxy error: protocol error");
287 case 0x08: return error("Proxy error: address type not supported");
288 default: return error("Proxy error: unknown");
291 if (pchRet2[2] != 0x00)
293 closesocket(hSocket);
294 return error("Error: malformed proxy response");
299 case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break;
300 case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break;
303 ret = recv(hSocket, pchRet3, 1, 0) != 1;
305 return error("Error reading from proxy");
306 int nRecv = pchRet3[0];
307 ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv;
310 default: closesocket(hSocket); return error("Error: malformed proxy response");
314 closesocket(hSocket);
315 return error("Error reading from proxy");
317 if (recv(hSocket, pchRet3, 2, 0) != 2)
319 closesocket(hSocket);
320 return error("Error reading from proxy");
322 printf("SOCKS5 connected %s\n", strDest.c_str());
326 bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout)
328 hSocketRet = INVALID_SOCKET;
331 struct sockaddr_storage sockaddr;
333 struct sockaddr sockaddr;
335 socklen_t len = sizeof(sockaddr);
336 if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
337 printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
341 SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
342 if (hSocket == INVALID_SOCKET)
346 setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
350 u_long fNonblock = 1;
351 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
353 int fFlags = fcntl(hSocket, F_GETFL, 0);
354 if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
357 closesocket(hSocket);
361 if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
363 // WSAEINVAL is here because some legacy version of winsock uses it
364 if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
366 struct timeval timeout;
367 timeout.tv_sec = nTimeout / 1000;
368 timeout.tv_usec = (nTimeout % 1000) * 1000;
372 FD_SET(hSocket, &fdset);
373 int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
376 printf("connection timeout\n");
377 closesocket(hSocket);
380 if (nRet == SOCKET_ERROR)
382 printf("select() for connection failed: %i\n",WSAGetLastError());
383 closesocket(hSocket);
386 socklen_t nRetSize = sizeof(nRet);
388 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
390 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
393 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
394 closesocket(hSocket);
399 printf("connect() failed after select(): %s\n",strerror(nRet));
400 closesocket(hSocket);
405 else if (WSAGetLastError() != WSAEISCONN)
410 printf("connect() failed: %i\n",WSAGetLastError());
411 closesocket(hSocket);
416 // this isn't even strictly necessary
417 // CNode::ConnectNode immediately turns the socket back to non-blocking
418 // but we'll turn it back to blocking just in case
421 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
423 fFlags = fcntl(hSocket, F_GETFL, 0);
424 if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
427 closesocket(hSocket);
431 hSocketRet = hSocket;
435 bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) {
436 assert(net >= 0 && net < NET_MAX);
437 if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5)
439 if (nSocksVersion != 0 && !addrProxy.IsValid())
442 proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion);
446 bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
447 assert(net >= 0 && net < NET_MAX);
449 if (!proxyInfo[net].second)
451 proxyInfoOut = proxyInfo[net];
455 bool SetNameProxy(CService addrProxy, int nSocksVersion) {
456 if (nSocksVersion != 0 && nSocksVersion != 5)
458 if (nSocksVersion != 0 && !addrProxy.IsValid())
461 nameproxyInfo = std::make_pair(addrProxy, nSocksVersion);
465 bool GetNameProxy(proxyType &nameproxyInfoOut) {
467 if (!nameproxyInfo.second)
469 nameproxyInfoOut = nameproxyInfo;
473 bool HaveNameProxy() {
475 return nameproxyInfo.second != 0;
478 bool IsProxy(const CNetAddr &addr) {
480 for (int i = 0; i < NET_MAX; i++) {
481 if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first))
487 bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
492 if (!GetProxy(addrDest.GetNetwork(), proxy))
493 return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout);
495 SOCKET hSocket = INVALID_SOCKET;
497 // first connect to proxy server
498 if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout))
501 // do socks negotiation
502 switch (proxy.second) {
504 if (!Socks4(addrDest, hSocket))
508 if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket))
515 hSocketRet = hSocket;
519 bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout)
522 int port = portDefault;
523 SplitHostPort(string(pszDest), port, strDest);
525 SOCKET hSocket = INVALID_SOCKET;
528 GetNameProxy(nameproxy);
530 CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port);
531 if (addrResolved.IsValid()) {
533 return ConnectSocket(addr, hSocketRet, nTimeout);
535 addr = CService("0.0.0.0:0");
536 if (!nameproxy.second)
538 if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout))
541 switch(nameproxy.second) {
543 case 4: return false;
545 if (!Socks5(strDest, port, hSocket))
550 hSocketRet = hSocket;
554 void CNetAddr::Init()
559 void CNetAddr::SetIP(const CNetAddr& ipIn)
561 memcpy(ip, ipIn.ip, sizeof(ip));
564 static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
565 static const unsigned char pchGarliCat[] = {0xFD,0x60,0xDB,0x4D,0xDD,0xB5};
567 bool CNetAddr::SetSpecial(const std::string &strName)
569 if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
570 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
571 if (vchAddr.size() != 16-sizeof(pchOnionCat))
573 memcpy(ip, pchOnionCat, sizeof(pchOnionCat));
574 for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++)
575 ip[i + sizeof(pchOnionCat)] = vchAddr[i];
578 if (strName.size()>11 && strName.substr(strName.size() - 11, 11) == ".oc.b32.i2p") {
579 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 11).c_str());
580 if (vchAddr.size() != 16-sizeof(pchGarliCat))
582 memcpy(ip, pchOnionCat, sizeof(pchGarliCat));
583 for (unsigned int i=0; i<16-sizeof(pchGarliCat); i++)
584 ip[i + sizeof(pchGarliCat)] = vchAddr[i];
595 CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
597 memcpy(ip, pchIPv4, 12);
598 memcpy(ip+12, &ipv4Addr, 4);
602 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
604 memcpy(ip, &ipv6Addr, 16);
608 CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
611 std::vector<CNetAddr> vIP;
612 if (LookupHost(pszIp, vIP, 1, fAllowLookup))
616 CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
619 std::vector<CNetAddr> vIP;
620 if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
624 unsigned int CNetAddr::GetByte(int n) const
629 bool CNetAddr::IsIPv4() const
631 return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
634 bool CNetAddr::IsIPv6() const
636 return (!IsIPv4() && !IsTor() && !IsI2P());
639 bool CNetAddr::IsRFC1918() const
643 (GetByte(3) == 192 && GetByte(2) == 168) ||
644 (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
647 bool CNetAddr::IsRFC3927() const
649 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
652 bool CNetAddr::IsRFC3849() const
654 return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
657 bool CNetAddr::IsRFC3964() const
659 return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
662 bool CNetAddr::IsRFC6052() const
664 static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
665 return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
668 bool CNetAddr::IsRFC4380() const
670 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
673 bool CNetAddr::IsRFC4862() const
675 static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
676 return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
679 bool CNetAddr::IsRFC4193() const
681 return ((GetByte(15) & 0xFE) == 0xFC);
684 bool CNetAddr::IsRFC6145() const
686 static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
687 return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
690 bool CNetAddr::IsRFC4843() const
692 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
695 bool CNetAddr::IsTor() const
697 return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
700 bool CNetAddr::IsI2P() const
702 return (memcmp(ip, pchGarliCat, sizeof(pchGarliCat)) == 0);
705 bool CNetAddr::IsLocal() const
708 if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
711 // IPv6 loopback (::1/128)
712 static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
713 if (memcmp(ip, pchLocal, 16) == 0)
719 bool CNetAddr::IsMulticast() const
721 return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
722 || (GetByte(15) == 0xFF);
725 bool CNetAddr::IsValid() const
727 // Cleanup 3-byte shifted addresses caused by garbage in size field
728 // of addr messages from versions before 0.2.9 checksum.
729 // Two consecutive addr messages look like this:
730 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
731 // so if the first length field is garbled, it reads the second batch
732 // of addr misaligned by 3 bytes.
733 if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
736 // unspecified IPv6 address (::/128)
737 unsigned char ipNone[16] = {};
738 if (memcmp(ip, ipNone, 16) == 0)
741 // documentation IPv6 address
748 uint32_t ipNone = INADDR_NONE;
749 if (memcmp(ip+12, &ipNone, 4) == 0)
754 if (memcmp(ip+12, &ipNone, 4) == 0)
761 bool CNetAddr::IsRoutable() const
763 return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || (IsRFC4193() && !IsTor() && !IsI2P()) || IsRFC4843() || IsLocal());
766 enum Network CNetAddr::GetNetwork() const
769 return NET_UNROUTABLE;
783 std::string CNetAddr::ToStringIP() const
786 return EncodeBase32(&ip[6], 10) + ".onion";
788 return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
789 CService serv(*this, 0);
791 struct sockaddr_storage sockaddr;
793 struct sockaddr sockaddr;
795 socklen_t socklen = sizeof(sockaddr);
796 if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
797 char name[1025] = "";
798 if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST))
799 return std::string(name);
802 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
804 return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
805 GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
806 GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
807 GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
808 GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
811 std::string CNetAddr::ToString() const
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 operator<(const CNetAddr& a, const CNetAddr& b)
828 return (memcmp(a.ip, b.ip, 16) < 0);
831 bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
835 memcpy(pipv4Addr, ip+12, 4);
840 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
842 memcpy(pipv6Addr, ip, 16);
847 // get canonical identifier of an address' group
848 // no two connections will be attempted to addresses with the same group
849 std::vector<unsigned char> CNetAddr::GetGroup() const
851 std::vector<unsigned char> vchRet;
852 int nClass = NET_IPV6;
856 // all local addresses belong to the same group
863 // all unroutable addresses belong to the same group
866 nClass = NET_UNROUTABLE;
869 // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
870 // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
871 else if (IsIPv4() || IsRFC6145() || IsRFC6052())
876 // for 6to4 tunnelled addresses, use the encapsulated IPv4 address
877 else if (IsRFC3964())
882 // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
883 else if (IsRFC4380())
885 vchRet.push_back(NET_IPV4);
886 vchRet.push_back(GetByte(3) ^ 0xFF);
887 vchRet.push_back(GetByte(2) ^ 0xFF);
902 // for he.net, use /36 groups
903 else if (GetByte(15) == 0x20 && GetByte(14) == 0x11 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
905 // for the rest of the IPv6 network, use /32 groups
909 vchRet.push_back(nClass);
912 vchRet.push_back(GetByte(15 - nStartByte));
917 vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
922 uint64 CNetAddr::GetHash() const
924 uint256 hash = Hash(&ip[0], &ip[16]);
926 memcpy(&nRet, &hash, sizeof(nRet));
930 void CNetAddr::print() const
932 printf("CNetAddr(%s)\n", ToString().c_str());
935 // private extensions to enum Network, only returned by GetExtNetwork,
936 // and only used in GetReachabilityFrom
937 static const int NET_UNKNOWN = NET_MAX + 0;
938 static const int NET_TEREDO = NET_MAX + 1;
939 int static GetExtNetwork(const CNetAddr *addr)
943 if (addr->IsRFC4380())
945 return addr->GetNetwork();
948 /** Calculates a metric for how reachable (*this) is from a given partner */
949 int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const
962 return REACH_UNREACHABLE;
964 int ourNet = GetExtNetwork(this);
965 int theirNet = GetExtNetwork(paddrPartner);
966 bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145();
971 default: return REACH_DEFAULT;
972 case NET_IPV4: return REACH_IPV4;
976 default: return REACH_DEFAULT;
977 case NET_TEREDO: return REACH_TEREDO;
978 case NET_IPV4: return REACH_IPV4;
979 case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled
983 default: return REACH_DEFAULT;
984 case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well
985 case NET_TOR: return REACH_PRIVATE;
989 default: return REACH_DEFAULT;
990 case NET_I2P: return REACH_PRIVATE;
994 default: return REACH_DEFAULT;
995 case NET_TEREDO: return REACH_TEREDO;
996 case NET_IPV6: return REACH_IPV6_WEAK;
997 case NET_IPV4: return REACH_IPV4;
1000 case NET_UNROUTABLE:
1003 default: return REACH_DEFAULT;
1004 case NET_TEREDO: return REACH_TEREDO;
1005 case NET_IPV6: return REACH_IPV6_WEAK;
1006 case NET_IPV4: return REACH_IPV4;
1007 case NET_I2P: return REACH_PRIVATE; // assume connections from unroutable addresses are
1008 case NET_TOR: return REACH_PRIVATE; // either from Tor/I2P, or don't care about our address
1013 void CService::Init()
1018 CService::CService()
1023 CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
1027 CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
1032 CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
1037 CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
1039 assert(addr.sin_family == AF_INET);
1043 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
1045 assert(addr.sin6_family == AF_INET6);
1049 bool CService::SetSockAddr(const struct sockaddr *paddr)
1051 switch (paddr->sa_family) {
1053 *this = CService(*(const struct sockaddr_in*)paddr);
1057 *this = CService(*(const struct sockaddr_in6*)paddr);
1065 CService::CService(const char *pszIpPort, bool fAllowLookup)
1069 if (Lookup(pszIpPort, ip, 0, fAllowLookup))
1073 CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup)
1077 if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
1081 CService::CService(const std::string &strIpPort, bool fAllowLookup)
1085 if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
1089 CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup)
1093 if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
1097 unsigned short CService::GetPort() const
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 || a.port != b.port;
1112 bool operator<(const CService& a, const CService& b)
1114 return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
1117 bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
1120 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in))
1122 *addrlen = sizeof(struct sockaddr_in);
1123 struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr;
1124 memset(paddrin, 0, *addrlen);
1125 if (!GetInAddr(&paddrin->sin_addr))
1127 paddrin->sin_family = AF_INET;
1128 paddrin->sin_port = htons(port);
1133 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
1135 *addrlen = sizeof(struct sockaddr_in6);
1136 struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr;
1137 memset(paddrin6, 0, *addrlen);
1138 if (!GetIn6Addr(&paddrin6->sin6_addr))
1140 paddrin6->sin6_family = AF_INET6;
1141 paddrin6->sin6_port = htons(port);
1148 std::vector<unsigned char> CService::GetKey() const
1150 std::vector<unsigned char> vKey;
1152 memcpy(&vKey[0], ip, 16);
1153 vKey[16] = port / 0x100;
1154 vKey[17] = port & 0x0FF;
1158 std::string CService::ToStringPort() const
1160 return strprintf("%u", port);
1163 std::string CService::ToStringIPPort() const
1165 if (IsIPv4() || IsTor() || IsI2P()) {
1166 return ToStringIP() + ":" + ToStringPort();
1168 return "[" + ToStringIP() + "]:" + ToStringPort();
1172 std::string CService::ToString() const
1174 return ToStringIPPort();
1177 void CService::print() const
1179 printf("CService(%s)\n", ToString().c_str());
1182 void CService::SetPort(unsigned short portIn)