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.
15 #include <sys/fcntl.h>
21 typedef SSIZE_T ssize_t;
24 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
25 #include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
30 static proxyType proxyInfo[NET_MAX];
31 static proxyType nameproxyInfo;
32 static CCriticalSection cs_proxyInfos;
33 int nConnectTimeout = 5000;
34 bool fNameLookup = false;
36 static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
38 enum Network ParseNetwork(std::string net) {
40 if (net == "ipv4") return NET_IPV4;
41 if (net == "ipv6") return NET_IPV6;
42 if (net == "tor" || net == "onion") return NET_TOR;
43 if (net == "i2p") return NET_I2P;
44 return NET_UNROUTABLE;
47 void SplitHostPort(std::string in, uint16_t &portOut, std::string &hostOut) {
48 size_t colon = in.find_last_of(':');
49 // if a : is found, and it either follows a [...], or no other : is in the string, treat it as port separator
50 bool fHaveColon = colon != in.npos;
51 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
52 bool fMultiColon = fHaveColon && (in.find_last_of(':',colon-1) != in.npos);
53 if (fHaveColon && (colon==0 || fBracketed || !fMultiColon)) {
55 int n = strtol(in.c_str() + colon + 1, &endp, 10);
56 if (endp && *endp == 0 && n >= 0) {
57 in = in.substr(0, colon);
58 if (n > 0 && n < 0x10000)
62 if (in.size()>0 && in[0] == '[' && in[in.size()-1] == ']')
63 hostOut = in.substr(1, in.size()-2);
68 bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
74 if (addr.SetSpecial(std::string(pszName))) {
80 struct addrinfo aiHint;
81 memset(&aiHint, 0, sizeof(struct addrinfo));
83 aiHint.ai_socktype = SOCK_STREAM;
84 aiHint.ai_protocol = IPPROTO_TCP;
86 aiHint.ai_family = AF_UNSPEC;
88 aiHint.ai_family = AF_INET;
91 aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
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 switch (aiTrav->ai_family)
106 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
107 vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
112 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
113 vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
118 aiTrav = aiTrav->ai_next;
123 return (vIP.size() > 0);
126 bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
128 std::string strHost(pszName);
131 if (boost::algorithm::starts_with(strHost, "[") && boost::algorithm::ends_with(strHost, "]"))
133 strHost = strHost.substr(1, strHost.size() - 2);
136 return LookupIntern(strHost.c_str(), vIP, nMaxSolutions, fAllowLookup);
139 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
141 return LookupHost(pszName, vIP, nMaxSolutions, false);
144 bool Lookup(const char *pszName, std::vector<CService>& vAddr, uint16_t portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
148 uint16_t port = portDefault;
149 std::string hostname = "";
150 SplitHostPort(std::string(pszName), port, hostname);
152 std::vector<CNetAddr> vIP;
153 bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
156 vAddr.resize(vIP.size());
157 for (unsigned int i = 0; i < vIP.size(); i++)
158 vAddr[i] = CService(vIP[i], port);
162 bool Lookup(const char *pszName, CService& addr, uint16_t portDefault, bool fAllowLookup)
164 std::vector<CService> vService;
165 bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
172 bool LookupNumeric(const char *pszName, CService& addr, uint16_t portDefault)
174 return Lookup(pszName, addr, portDefault, false);
177 bool static Socks4(const CService &addrDest, SOCKET& hSocket)
179 printf("SOCKS4 connecting %s\n", addrDest.ToString().c_str());
180 if (!addrDest.IsIPv4())
182 closesocket(hSocket);
183 return error("Proxy destination is not IPv4");
185 char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
186 struct sockaddr_in addr;
187 socklen_t len = sizeof(addr);
188 if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET)
190 closesocket(hSocket);
191 return error("Cannot get proxy destination address");
193 memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
194 memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
195 char* pszSocks4 = pszSocks4IP;
196 int nSize = sizeof(pszSocks4IP);
198 int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
201 closesocket(hSocket);
202 return error("Error sending to proxy");
205 if (recv(hSocket, pchRet, 8, 0) != 8)
207 closesocket(hSocket);
208 return error("Error reading proxy response");
210 if (pchRet[1] != 0x5a)
212 closesocket(hSocket);
213 if (pchRet[1] != 0x5b)
214 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
217 printf("SOCKS4 connected %s\n", addrDest.ToString().c_str());
221 bool static Socks5(string strDest, uint16_t port, SOCKET& hSocket)
223 printf("SOCKS5 connecting %s\n", strDest.c_str());
224 if (strDest.size() > 255)
226 closesocket(hSocket);
227 return error("Hostname too long");
229 char pszSocks5Init[] = "\5\1\0";
230 ssize_t nSize = sizeof(pszSocks5Init) - 1;
232 ssize_t ret = send(hSocket, pszSocks5Init, nSize, MSG_NOSIGNAL);
235 closesocket(hSocket);
236 return error("Error sending to proxy");
239 if (recv(hSocket, pchRet1, 2, 0) != 2)
241 closesocket(hSocket);
242 return error("Error reading proxy response");
244 if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00)
246 closesocket(hSocket);
247 return error("Proxy failed to initialize");
249 string strSocks5("\5\1");
250 strSocks5 += '\000'; strSocks5 += '\003';
251 strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255));
252 strSocks5 += strDest;
253 strSocks5 += static_cast<char>((port >> 8) & 0xFF);
254 strSocks5 += static_cast<char>((port >> 0) & 0xFF);
255 ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
256 if (ret != (ssize_t)strSocks5.size())
258 closesocket(hSocket);
259 return error("Error sending to proxy");
262 if (recv(hSocket, pchRet2, 4, 0) != 4)
264 closesocket(hSocket);
265 return error("Error reading proxy response");
267 if (pchRet2[0] != 0x05)
269 closesocket(hSocket);
270 return error("Proxy failed to accept request");
272 if (pchRet2[1] != 0x00)
274 closesocket(hSocket);
277 case 0x01: return error("Proxy error: general failure");
278 case 0x02: return error("Proxy error: connection not allowed");
279 case 0x03: return error("Proxy error: network unreachable");
280 case 0x04: return error("Proxy error: host unreachable");
281 case 0x05: return error("Proxy error: connection refused");
282 case 0x06: return error("Proxy error: TTL expired");
283 case 0x07: return error("Proxy error: protocol error");
284 case 0x08: return error("Proxy error: address type not supported");
285 default: return error("Proxy error: unknown");
288 if (pchRet2[2] != 0x00)
290 closesocket(hSocket);
291 return error("Error: malformed proxy response");
296 case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break;
297 case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break;
300 ret = recv(hSocket, pchRet3, 1, 0) != 1;
302 closesocket(hSocket);
303 return error("Error reading from proxy");
305 int nRecv = pchRet3[0];
306 ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv;
309 default: closesocket(hSocket); return error("Error: malformed proxy response");
313 closesocket(hSocket);
314 return error("Error reading from proxy");
316 if (recv(hSocket, pchRet3, 2, 0) != 2)
318 closesocket(hSocket);
319 return error("Error reading from proxy");
321 printf("SOCKS5 connected %s\n", strDest.c_str());
325 bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout)
327 hSocketRet = INVALID_SOCKET;
330 struct sockaddr_storage sockaddr;
332 struct sockaddr sockaddr;
334 socklen_t len = sizeof(sockaddr);
335 if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
336 printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
340 SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
341 if (hSocket == INVALID_SOCKET)
345 setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
349 u_long fNonblock = 1;
350 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
352 int fFlags = fcntl(hSocket, F_GETFL, 0);
353 if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
356 closesocket(hSocket);
360 if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
362 int nErr = WSAGetLastError();
363 // WSAEINVAL is here because some legacy version of winsock uses it
364 if (nErr == WSAEINPROGRESS || nErr == WSAEWOULDBLOCK || nErr == 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))
512 closesocket(hSocket);
516 hSocketRet = hSocket;
520 bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, uint16_t portDefault, int nTimeout)
523 uint16_t port = portDefault;
524 SplitHostPort(string(pszDest), port, strDest);
526 SOCKET hSocket = INVALID_SOCKET;
529 GetNameProxy(nameproxy);
531 CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port);
532 if (addrResolved.IsValid()) {
534 return ConnectSocket(addr, hSocketRet, nTimeout);
536 addr = CService("0.0.0.0:0");
537 if (!nameproxy.second)
539 if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout))
542 switch(nameproxy.second) {
545 closesocket(hSocket);
548 if (!Socks5(strDest, port, hSocket))
553 hSocketRet = hSocket;
557 void CNetAddr::Init()
559 memset(ip, 0, sizeof(ip));
562 void CNetAddr::SetIP(const CNetAddr& ipIn)
564 memcpy(ip, ipIn.ip, sizeof(ip));
567 static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
568 static const unsigned char pchGarliCat[] = {0xFD,0x60,0xDB,0x4D,0xDD,0xB5};
570 bool CNetAddr::SetSpecial(const std::string &strName)
572 if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
573 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
574 if (vchAddr.size() != 16-sizeof(pchOnionCat))
576 memcpy(ip, pchOnionCat, sizeof(pchOnionCat));
577 for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++)
578 ip[i + sizeof(pchOnionCat)] = vchAddr[i];
581 if (strName.size()>11 && strName.substr(strName.size() - 11, 11) == ".oc.b32.i2p") {
582 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 11).c_str());
583 if (vchAddr.size() != 16-sizeof(pchGarliCat))
585 memcpy(ip, pchOnionCat, sizeof(pchGarliCat));
586 for (unsigned int i=0; i<16-sizeof(pchGarliCat); i++)
587 ip[i + sizeof(pchGarliCat)] = vchAddr[i];
598 CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
600 memcpy(ip, pchIPv4, 12);
601 memcpy(ip+12, &ipv4Addr, 4);
605 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
607 memcpy(ip, &ipv6Addr, 16);
611 CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
614 std::vector<CNetAddr> vIP;
615 if (LookupHost(pszIp, vIP, 1, fAllowLookup))
619 CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
622 std::vector<CNetAddr> vIP;
623 if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
627 uint8_t CNetAddr::GetByte(int n) const
632 bool CNetAddr::IsIPv4() const
634 return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
637 bool CNetAddr::IsIPv6() const
639 return (!IsIPv4() && !IsTor() && !IsI2P());
642 bool CNetAddr::IsRFC1918() const
646 (GetByte(3) == 192 && GetByte(2) == 168) ||
647 (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
650 bool CNetAddr::IsRFC3927() const
652 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
655 bool CNetAddr::IsRFC3849() const
657 return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
660 bool CNetAddr::IsRFC3964() const
662 return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
665 bool CNetAddr::IsRFC6052() const
667 static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
668 return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
671 bool CNetAddr::IsRFC4380() const
673 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
676 bool CNetAddr::IsRFC4862() const
678 static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
679 return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
682 bool CNetAddr::IsRFC4193() const
684 return ((GetByte(15) & 0xFE) == 0xFC);
687 bool CNetAddr::IsRFC6145() const
689 static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
690 return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
693 bool CNetAddr::IsRFC4843() const
695 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
698 bool CNetAddr::IsTor() const
700 return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
703 bool CNetAddr::IsI2P() const
705 return (memcmp(ip, pchGarliCat, sizeof(pchGarliCat)) == 0);
708 bool CNetAddr::IsLocal() const
711 if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
714 // IPv6 loopback (::1/128)
715 static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
716 if (memcmp(ip, pchLocal, 16) == 0)
722 bool CNetAddr::IsMulticast() const
724 return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
725 || (GetByte(15) == 0xFF);
728 bool CNetAddr::IsValid() const
730 // Cleanup 3-byte shifted addresses caused by garbage in size field
731 // of addr messages from versions before 0.2.9 checksum.
732 // Two consecutive addr messages look like this:
733 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
734 // so if the first length field is garbled, it reads the second batch
735 // of addr misaligned by 3 bytes.
736 if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
739 // unspecified IPv6 address (::/128)
740 unsigned char ipNone[16] = {};
741 if (memcmp(ip, ipNone, 16) == 0)
744 // documentation IPv6 address
751 uint32_t ipNone = INADDR_NONE;
752 if (memcmp(ip+12, &ipNone, 4) == 0)
757 if (memcmp(ip+12, &ipNone, 4) == 0)
764 bool CNetAddr::IsRoutable() const
766 return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || (IsRFC4193() && !IsTor() && !IsI2P()) || IsRFC4843() || IsLocal());
769 enum Network CNetAddr::GetNetwork() const
772 return NET_UNROUTABLE;
786 std::string CNetAddr::ToStringIP() const
789 return EncodeBase32(&ip[6], 10) + ".onion";
791 return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
792 CService serv(*this, (uint16_t)0);
794 struct sockaddr_storage sockaddr;
796 struct sockaddr sockaddr;
798 socklen_t socklen = sizeof(sockaddr);
799 if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
800 char name[1025] = "";
801 if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST))
802 return std::string(name);
805 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
807 return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
808 GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
809 GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
810 GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
811 GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
814 std::string CNetAddr::ToString() const
819 bool operator==(const CNetAddr& a, const CNetAddr& b)
821 return (memcmp(a.ip, b.ip, 16) == 0);
824 bool operator!=(const CNetAddr& a, const CNetAddr& b)
826 return (memcmp(a.ip, b.ip, 16) != 0);
829 bool operator<(const CNetAddr& a, const CNetAddr& b)
831 return (memcmp(a.ip, b.ip, 16) < 0);
834 bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
838 memcpy(pipv4Addr, ip+12, 4);
843 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
845 memcpy(pipv6Addr, ip, 16);
850 // get canonical identifier of an address' group
851 // no two connections will be attempted to addresses with the same group
852 std::vector<unsigned char> CNetAddr::GetGroup() const
854 std::vector<unsigned char> vchRet;
855 uint8_t nClass = NET_IPV6;
859 // all local addresses belong to the same group
866 // all unroutable addresses belong to the same group
869 nClass = NET_UNROUTABLE;
872 // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
873 // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
874 else if (IsIPv4() || IsRFC6145() || IsRFC6052())
879 // for 6to4 tunnelled addresses, use the encapsulated IPv4 address
880 else if (IsRFC3964())
885 // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
886 else if (IsRFC4380())
888 vchRet.push_back(NET_IPV4);
889 vchRet.push_back(GetByte(3) ^ 0xFF);
890 vchRet.push_back(GetByte(2) ^ 0xFF);
905 // for he.net, use /36 groups
906 else if (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
908 // for the rest of the IPv6 network, use /32 groups
912 vchRet.push_back(nClass);
915 vchRet.push_back(GetByte(15 - nStartByte));
920 vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
925 uint64_t CNetAddr::GetHash() const
927 uint256 hash = Hash(&ip[0], &ip[16]);
929 memcpy(&nRet, &hash, sizeof(nRet));
933 void CNetAddr::print() const
935 printf("CNetAddr(%s)\n", ToString().c_str());
938 // private extensions to enum Network, only returned by GetExtNetwork,
939 // and only used in GetReachabilityFrom
940 static const int NET_UNKNOWN = NET_MAX + 0;
941 static const int NET_TEREDO = NET_MAX + 1;
942 int static GetExtNetwork(const CNetAddr *addr)
946 if (addr->IsRFC4380())
948 return addr->GetNetwork();
951 /** Calculates a metric for how reachable (*this) is from a given partner */
952 int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const
965 return REACH_UNREACHABLE;
967 int ourNet = GetExtNetwork(this);
968 int theirNet = GetExtNetwork(paddrPartner);
969 bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145();
974 default: return REACH_DEFAULT;
975 case NET_IPV4: return REACH_IPV4;
979 default: return REACH_DEFAULT;
980 case NET_TEREDO: return REACH_TEREDO;
981 case NET_IPV4: return REACH_IPV4;
982 case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled
986 default: return REACH_DEFAULT;
987 case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well
988 case NET_TOR: return REACH_PRIVATE;
992 default: return REACH_DEFAULT;
993 case NET_I2P: return REACH_PRIVATE;
997 default: return REACH_DEFAULT;
998 case NET_TEREDO: return REACH_TEREDO;
999 case NET_IPV6: return REACH_IPV6_WEAK;
1000 case NET_IPV4: return REACH_IPV4;
1003 case NET_UNROUTABLE:
1006 default: return REACH_DEFAULT;
1007 case NET_TEREDO: return REACH_TEREDO;
1008 case NET_IPV6: return REACH_IPV6_WEAK;
1009 case NET_IPV4: return REACH_IPV4;
1010 case NET_I2P: return REACH_PRIVATE; // assume connections from unroutable addresses are
1011 case NET_TOR: return REACH_PRIVATE; // either from Tor/I2P, or don't care about our address
1016 void CService::Init()
1021 CService::CService()
1026 CService::CService(const CNetAddr& cip, uint16_t portIn) : CNetAddr(cip), port(portIn)
1030 CService::CService(const struct in_addr& ipv4Addr, uint16_t portIn) : CNetAddr(ipv4Addr), port(portIn)
1035 CService::CService(const struct in6_addr& ipv6Addr, uint16_t portIn) : CNetAddr(ipv6Addr), port(portIn)
1040 CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
1042 assert(addr.sin_family == AF_INET);
1046 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
1048 assert(addr.sin6_family == AF_INET6);
1052 bool CService::SetSockAddr(const struct sockaddr *paddr)
1054 switch (paddr->sa_family) {
1056 *this = CService(*(const struct sockaddr_in*)paddr);
1060 *this = CService(*(const struct sockaddr_in6*)paddr);
1068 CService::CService(const char *pszIpPort, bool fAllowLookup)
1072 if (Lookup(pszIpPort, ip, 0, fAllowLookup))
1076 CService::CService(const char *pszIpPort, uint16_t portDefault, bool fAllowLookup)
1080 if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
1084 CService::CService(const std::string &strIpPort, bool fAllowLookup)
1088 if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
1092 CService::CService(const std::string &strIpPort, uint16_t portDefault, bool fAllowLookup)
1096 if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
1100 unsigned short CService::GetPort() const
1105 bool operator==(const CService& a, const CService& b)
1107 return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
1110 bool operator!=(const CService& a, const CService& b)
1112 return (CNetAddr)a != (CNetAddr)b || a.port != b.port;
1115 bool operator<(const CService& a, const CService& b)
1117 return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
1120 bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
1123 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in))
1125 *addrlen = sizeof(struct sockaddr_in);
1126 struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr;
1127 memset(paddrin, 0, *addrlen);
1128 if (!GetInAddr(&paddrin->sin_addr))
1130 paddrin->sin_family = AF_INET;
1131 paddrin->sin_port = htons(port);
1136 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
1138 *addrlen = sizeof(struct sockaddr_in6);
1139 struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr;
1140 memset(paddrin6, 0, *addrlen);
1141 if (!GetIn6Addr(&paddrin6->sin6_addr))
1143 paddrin6->sin6_family = AF_INET6;
1144 paddrin6->sin6_port = htons(port);
1151 std::vector<unsigned char> CService::GetKey() const
1153 std::vector<unsigned char> vKey;
1155 memcpy(&vKey[0], ip, 16);
1156 vKey[16] = port / 0x100;
1157 vKey[17] = port & 0x0FF;
1161 std::string CService::ToStringPort() const
1163 return strprintf("%u", port);
1166 std::string CService::ToStringIPPort() const
1168 if (IsIPv4() || IsTor() || IsI2P()) {
1169 return ToStringIP() + ":" + ToStringPort();
1171 return "[" + ToStringIP() + "]:" + ToStringPort();
1175 std::string CService::ToString() const
1177 return ToStringIPPort();
1180 void CService::print() const
1182 printf("CService(%s)\n", ToString().c_str());
1185 void CService::SetPort(unsigned short portIn)