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") return NET_TOR;
43 if (net == "i2p") return NET_I2P;
44 return NET_UNROUTABLE;
47 void SplitHostPort(std::string in, int &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;
87 aiHint.ai_family = AF_UNSPEC;
89 aiHint.ai_family = AF_INET;
91 aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
94 aiHint.ai_family = AF_UNSPEC;
96 aiHint.ai_family = AF_INET;
98 aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
100 struct addrinfo *aiRes = NULL;
101 int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
105 struct addrinfo *aiTrav = aiRes;
106 while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions))
108 switch (aiTrav->ai_family)
111 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
112 vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
117 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
118 vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
123 aiTrav = aiTrav->ai_next;
128 return (vIP.size() > 0);
131 bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
133 std::string str(pszName);
134 std::string strHost = str;
137 if (boost::algorithm::starts_with(str, "[") && boost::algorithm::ends_with(str, "]"))
139 strHost = str.substr(1, str.size() - 2);
142 return LookupIntern(strHost.c_str(), vIP, nMaxSolutions, fAllowLookup);
145 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
147 return LookupHost(pszName, vIP, nMaxSolutions, false);
150 bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
154 int port = portDefault;
155 std::string hostname = "";
156 SplitHostPort(std::string(pszName), port, hostname);
158 std::vector<CNetAddr> vIP;
159 bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
162 vAddr.resize(vIP.size());
163 for (unsigned int i = 0; i < vIP.size(); i++)
164 vAddr[i] = CService(vIP[i], port);
168 bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
170 std::vector<CService> vService;
171 bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
178 bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
180 return Lookup(pszName, addr, portDefault, false);
183 bool static Socks4(const CService &addrDest, SOCKET& hSocket)
185 printf("SOCKS4 connecting %s\n", addrDest.ToString().c_str());
186 if (!addrDest.IsIPv4())
188 closesocket(hSocket);
189 return error("Proxy destination is not IPv4");
191 char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
192 struct sockaddr_in addr;
193 socklen_t len = sizeof(addr);
194 if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET)
196 closesocket(hSocket);
197 return error("Cannot get proxy destination address");
199 memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
200 memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
201 char* pszSocks4 = pszSocks4IP;
202 int nSize = sizeof(pszSocks4IP);
204 int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
207 closesocket(hSocket);
208 return error("Error sending to proxy");
211 if (recv(hSocket, pchRet, 8, 0) != 8)
213 closesocket(hSocket);
214 return error("Error reading proxy response");
216 if (pchRet[1] != 0x5a)
218 closesocket(hSocket);
219 if (pchRet[1] != 0x5b)
220 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
223 printf("SOCKS4 connected %s\n", addrDest.ToString().c_str());
227 bool static Socks5(string strDest, int port, SOCKET& hSocket)
229 printf("SOCKS5 connecting %s\n", strDest.c_str());
230 if (strDest.size() > 255)
232 closesocket(hSocket);
233 return error("Hostname too long");
235 char pszSocks5Init[] = "\5\1\0";
236 char *pszSocks5 = pszSocks5Init;
237 ssize_t nSize = sizeof(pszSocks5Init) - 1;
239 ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
242 closesocket(hSocket);
243 return error("Error sending to proxy");
246 if (recv(hSocket, pchRet1, 2, 0) != 2)
248 closesocket(hSocket);
249 return error("Error reading proxy response");
251 if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00)
253 closesocket(hSocket);
254 return error("Proxy failed to initialize");
256 string strSocks5("\5\1");
257 strSocks5 += '\000'; strSocks5 += '\003';
258 strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255));
259 strSocks5 += strDest;
260 strSocks5 += static_cast<char>((port >> 8) & 0xFF);
261 strSocks5 += static_cast<char>((port >> 0) & 0xFF);
262 ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
263 if (ret != (ssize_t)strSocks5.size())
265 closesocket(hSocket);
266 return error("Error sending to proxy");
269 if (recv(hSocket, pchRet2, 4, 0) != 4)
271 closesocket(hSocket);
272 return error("Error reading proxy response");
274 if (pchRet2[0] != 0x05)
276 closesocket(hSocket);
277 return error("Proxy failed to accept request");
279 if (pchRet2[1] != 0x00)
281 closesocket(hSocket);
284 case 0x01: return error("Proxy error: general failure");
285 case 0x02: return error("Proxy error: connection not allowed");
286 case 0x03: return error("Proxy error: network unreachable");
287 case 0x04: return error("Proxy error: host unreachable");
288 case 0x05: return error("Proxy error: connection refused");
289 case 0x06: return error("Proxy error: TTL expired");
290 case 0x07: return error("Proxy error: protocol error");
291 case 0x08: return error("Proxy error: address type not supported");
292 default: return error("Proxy error: unknown");
295 if (pchRet2[2] != 0x00)
297 closesocket(hSocket);
298 return error("Error: malformed proxy response");
303 case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break;
304 case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break;
307 ret = recv(hSocket, pchRet3, 1, 0) != 1;
309 return error("Error reading from proxy");
310 int nRecv = pchRet3[0];
311 ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv;
314 default: closesocket(hSocket); return error("Error: malformed proxy response");
318 closesocket(hSocket);
319 return error("Error reading from proxy");
321 if (recv(hSocket, pchRet3, 2, 0) != 2)
323 closesocket(hSocket);
324 return error("Error reading from proxy");
326 printf("SOCKS5 connected %s\n", strDest.c_str());
330 bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout)
332 hSocketRet = INVALID_SOCKET;
335 struct sockaddr_storage sockaddr;
337 struct sockaddr sockaddr;
339 socklen_t len = sizeof(sockaddr);
340 if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
341 printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
345 SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
346 if (hSocket == INVALID_SOCKET)
350 setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
354 u_long fNonblock = 1;
355 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
357 int fFlags = fcntl(hSocket, F_GETFL, 0);
358 if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
361 closesocket(hSocket);
365 if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
367 // WSAEINVAL is here because some legacy version of winsock uses it
368 if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
370 struct timeval timeout;
371 timeout.tv_sec = nTimeout / 1000;
372 timeout.tv_usec = (nTimeout % 1000) * 1000;
376 FD_SET(hSocket, &fdset);
377 int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
380 printf("connection timeout\n");
381 closesocket(hSocket);
384 if (nRet == SOCKET_ERROR)
386 printf("select() for connection failed: %i\n",WSAGetLastError());
387 closesocket(hSocket);
390 socklen_t nRetSize = sizeof(nRet);
392 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
394 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
397 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
398 closesocket(hSocket);
403 printf("connect() failed after select(): %s\n",strerror(nRet));
404 closesocket(hSocket);
409 else if (WSAGetLastError() != WSAEISCONN)
414 printf("connect() failed: %i\n",WSAGetLastError());
415 closesocket(hSocket);
420 // this isn't even strictly necessary
421 // CNode::ConnectNode immediately turns the socket back to non-blocking
422 // but we'll turn it back to blocking just in case
425 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
427 fFlags = fcntl(hSocket, F_GETFL, 0);
428 if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
431 closesocket(hSocket);
435 hSocketRet = hSocket;
439 bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) {
440 assert(net >= 0 && net < NET_MAX);
441 if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5)
443 if (nSocksVersion != 0 && !addrProxy.IsValid())
446 proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion);
450 bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
451 assert(net >= 0 && net < NET_MAX);
453 if (!proxyInfo[net].second)
455 proxyInfoOut = proxyInfo[net];
459 bool SetNameProxy(CService addrProxy, int nSocksVersion) {
460 if (nSocksVersion != 0 && nSocksVersion != 5)
462 if (nSocksVersion != 0 && !addrProxy.IsValid())
465 nameproxyInfo = std::make_pair(addrProxy, nSocksVersion);
469 bool GetNameProxy(proxyType &nameproxyInfoOut) {
471 if (!nameproxyInfo.second)
473 nameproxyInfoOut = nameproxyInfo;
477 bool HaveNameProxy() {
479 return nameproxyInfo.second != 0;
482 bool IsProxy(const CNetAddr &addr) {
484 for (int i = 0; i < NET_MAX; i++) {
485 if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first))
491 bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
496 if (!GetProxy(addrDest.GetNetwork(), proxy))
497 return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout);
499 SOCKET hSocket = INVALID_SOCKET;
501 // first connect to proxy server
502 if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout))
505 // do socks negotiation
506 switch (proxy.second) {
508 if (!Socks4(addrDest, hSocket))
512 if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket))
519 hSocketRet = hSocket;
523 bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout)
526 int port = portDefault;
527 SplitHostPort(string(pszDest), port, strDest);
529 SOCKET hSocket = INVALID_SOCKET;
532 GetNameProxy(nameproxy);
534 CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port);
535 if (addrResolved.IsValid()) {
537 return ConnectSocket(addr, hSocketRet, nTimeout);
539 addr = CService("0.0.0.0:0");
540 if (!nameproxy.second)
542 if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout))
545 switch(nameproxy.second) {
547 case 4: return false;
549 if (!Socks5(strDest, port, hSocket))
554 hSocketRet = hSocket;
558 void CNetAddr::Init()
560 memset(ip, 0, sizeof(ip));
563 void CNetAddr::SetIP(const CNetAddr& ipIn)
565 memcpy(ip, ipIn.ip, sizeof(ip));
568 static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
569 static const unsigned char pchGarliCat[] = {0xFD,0x60,0xDB,0x4D,0xDD,0xB5};
571 bool CNetAddr::SetSpecial(const std::string &strName)
573 if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
574 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
575 if (vchAddr.size() != 16-sizeof(pchOnionCat))
577 memcpy(ip, pchOnionCat, sizeof(pchOnionCat));
578 for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++)
579 ip[i + sizeof(pchOnionCat)] = vchAddr[i];
582 if (strName.size()>11 && strName.substr(strName.size() - 11, 11) == ".oc.b32.i2p") {
583 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 11).c_str());
584 if (vchAddr.size() != 16-sizeof(pchGarliCat))
586 memcpy(ip, pchOnionCat, sizeof(pchGarliCat));
587 for (unsigned int i=0; i<16-sizeof(pchGarliCat); i++)
588 ip[i + sizeof(pchGarliCat)] = vchAddr[i];
599 CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
601 memcpy(ip, pchIPv4, 12);
602 memcpy(ip+12, &ipv4Addr, 4);
606 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
608 memcpy(ip, &ipv6Addr, 16);
612 CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
615 std::vector<CNetAddr> vIP;
616 if (LookupHost(pszIp, vIP, 1, fAllowLookup))
620 CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
623 std::vector<CNetAddr> vIP;
624 if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
628 unsigned int CNetAddr::GetByte(int n) const
633 bool CNetAddr::IsIPv4() const
635 return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
638 bool CNetAddr::IsIPv6() const
640 return (!IsIPv4() && !IsTor() && !IsI2P());
643 bool CNetAddr::IsRFC1918() const
647 (GetByte(3) == 192 && GetByte(2) == 168) ||
648 (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
651 bool CNetAddr::IsRFC3927() const
653 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
656 bool CNetAddr::IsRFC3849() const
658 return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
661 bool CNetAddr::IsRFC3964() const
663 return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
666 bool CNetAddr::IsRFC6052() const
668 static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
669 return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
672 bool CNetAddr::IsRFC4380() const
674 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
677 bool CNetAddr::IsRFC4862() const
679 static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
680 return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
683 bool CNetAddr::IsRFC4193() const
685 return ((GetByte(15) & 0xFE) == 0xFC);
688 bool CNetAddr::IsRFC6145() const
690 static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
691 return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
694 bool CNetAddr::IsRFC4843() const
696 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
699 bool CNetAddr::IsTor() const
701 return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
704 bool CNetAddr::IsI2P() const
706 return (memcmp(ip, pchGarliCat, sizeof(pchGarliCat)) == 0);
709 bool CNetAddr::IsLocal() const
712 if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
715 // IPv6 loopback (::1/128)
716 static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
717 if (memcmp(ip, pchLocal, 16) == 0)
723 bool CNetAddr::IsMulticast() const
725 return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
726 || (GetByte(15) == 0xFF);
729 bool CNetAddr::IsValid() const
731 // Cleanup 3-byte shifted addresses caused by garbage in size field
732 // of addr messages from versions before 0.2.9 checksum.
733 // Two consecutive addr messages look like this:
734 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
735 // so if the first length field is garbled, it reads the second batch
736 // of addr misaligned by 3 bytes.
737 if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
740 // unspecified IPv6 address (::/128)
741 unsigned char ipNone[16] = {};
742 if (memcmp(ip, ipNone, 16) == 0)
745 // documentation IPv6 address
752 uint32_t ipNone = INADDR_NONE;
753 if (memcmp(ip+12, &ipNone, 4) == 0)
758 if (memcmp(ip+12, &ipNone, 4) == 0)
765 bool CNetAddr::IsRoutable() const
767 return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || (IsRFC4193() && !IsTor() && !IsI2P()) || IsRFC4843() || IsLocal());
770 enum Network CNetAddr::GetNetwork() const
773 return NET_UNROUTABLE;
787 std::string CNetAddr::ToStringIP() const
790 return EncodeBase32(&ip[6], 10) + ".onion";
792 return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
793 CService serv(*this, 0);
795 struct sockaddr_storage sockaddr;
797 struct sockaddr sockaddr;
799 socklen_t socklen = sizeof(sockaddr);
800 if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
801 char name[1025] = "";
802 if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST))
803 return std::string(name);
806 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
808 return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
809 GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
810 GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
811 GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
812 GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
815 std::string CNetAddr::ToString() const
820 bool operator==(const CNetAddr& a, const CNetAddr& b)
822 return (memcmp(a.ip, b.ip, 16) == 0);
825 bool operator!=(const CNetAddr& a, const CNetAddr& b)
827 return (memcmp(a.ip, b.ip, 16) != 0);
830 bool operator<(const CNetAddr& a, const CNetAddr& b)
832 return (memcmp(a.ip, b.ip, 16) < 0);
835 bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
839 memcpy(pipv4Addr, ip+12, 4);
844 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
846 memcpy(pipv6Addr, ip, 16);
851 // get canonical identifier of an address' group
852 // no two connections will be attempted to addresses with the same group
853 std::vector<unsigned char> CNetAddr::GetGroup() const
855 std::vector<unsigned char> vchRet;
856 int nClass = NET_IPV6;
860 // all local addresses belong to the same group
867 // all unroutable addresses belong to the same group
870 nClass = NET_UNROUTABLE;
873 // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
874 // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
875 else if (IsIPv4() || IsRFC6145() || IsRFC6052())
880 // for 6to4 tunnelled addresses, use the encapsulated IPv4 address
881 else if (IsRFC3964())
886 // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
887 else if (IsRFC4380())
889 vchRet.push_back(NET_IPV4);
890 vchRet.push_back(GetByte(3) ^ 0xFF);
891 vchRet.push_back(GetByte(2) ^ 0xFF);
906 // for he.net, use /36 groups
907 else if (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
909 // for the rest of the IPv6 network, use /32 groups
913 vchRet.push_back(nClass);
916 vchRet.push_back(GetByte(15 - nStartByte));
921 vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
926 uint64_t CNetAddr::GetHash() const
928 uint256 hash = Hash(&ip[0], &ip[16]);
930 memcpy(&nRet, &hash, sizeof(nRet));
934 void CNetAddr::print() const
936 printf("CNetAddr(%s)\n", ToString().c_str());
939 // private extensions to enum Network, only returned by GetExtNetwork,
940 // and only used in GetReachabilityFrom
941 static const int NET_UNKNOWN = NET_MAX + 0;
942 static const int NET_TEREDO = NET_MAX + 1;
943 int static GetExtNetwork(const CNetAddr *addr)
947 if (addr->IsRFC4380())
949 return addr->GetNetwork();
952 /** Calculates a metric for how reachable (*this) is from a given partner */
953 int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const
966 return REACH_UNREACHABLE;
968 int ourNet = GetExtNetwork(this);
969 int theirNet = GetExtNetwork(paddrPartner);
970 bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145();
975 default: return REACH_DEFAULT;
976 case NET_IPV4: return REACH_IPV4;
980 default: return REACH_DEFAULT;
981 case NET_TEREDO: return REACH_TEREDO;
982 case NET_IPV4: return REACH_IPV4;
983 case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled
987 default: return REACH_DEFAULT;
988 case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well
989 case NET_TOR: return REACH_PRIVATE;
993 default: return REACH_DEFAULT;
994 case NET_I2P: return REACH_PRIVATE;
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;
1004 case NET_UNROUTABLE:
1007 default: return REACH_DEFAULT;
1008 case NET_TEREDO: return REACH_TEREDO;
1009 case NET_IPV6: return REACH_IPV6_WEAK;
1010 case NET_IPV4: return REACH_IPV4;
1011 case NET_I2P: return REACH_PRIVATE; // assume connections from unroutable addresses are
1012 case NET_TOR: return REACH_PRIVATE; // either from Tor/I2P, or don't care about our address
1017 void CService::Init()
1022 CService::CService()
1027 CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
1031 CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
1036 CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
1041 CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
1043 assert(addr.sin_family == AF_INET);
1047 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
1049 assert(addr.sin6_family == AF_INET6);
1053 bool CService::SetSockAddr(const struct sockaddr *paddr)
1055 switch (paddr->sa_family) {
1057 *this = CService(*(const struct sockaddr_in*)paddr);
1061 *this = CService(*(const struct sockaddr_in6*)paddr);
1069 CService::CService(const char *pszIpPort, bool fAllowLookup)
1073 if (Lookup(pszIpPort, ip, 0, fAllowLookup))
1077 CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup)
1081 if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
1085 CService::CService(const std::string &strIpPort, bool fAllowLookup)
1089 if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
1093 CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup)
1097 if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
1101 unsigned short CService::GetPort() const
1106 bool operator==(const CService& a, const CService& b)
1108 return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
1111 bool operator!=(const CService& a, const CService& b)
1113 return (CNetAddr)a != (CNetAddr)b || a.port != b.port;
1116 bool operator<(const CService& a, const CService& b)
1118 return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
1121 bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
1124 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in))
1126 *addrlen = sizeof(struct sockaddr_in);
1127 struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr;
1128 memset(paddrin, 0, *addrlen);
1129 if (!GetInAddr(&paddrin->sin_addr))
1131 paddrin->sin_family = AF_INET;
1132 paddrin->sin_port = htons(port);
1137 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
1139 *addrlen = sizeof(struct sockaddr_in6);
1140 struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr;
1141 memset(paddrin6, 0, *addrlen);
1142 if (!GetIn6Addr(&paddrin6->sin6_addr))
1144 paddrin6->sin6_family = AF_INET6;
1145 paddrin6->sin6_port = htons(port);
1152 std::vector<unsigned char> CService::GetKey() const
1154 std::vector<unsigned char> vKey;
1156 memcpy(&vKey[0], ip, 16);
1157 vKey[16] = port / 0x100;
1158 vKey[17] = port & 0x0FF;
1162 std::string CService::ToStringPort() const
1164 return strprintf("%u", port);
1167 std::string CService::ToStringIPPort() const
1169 if (IsIPv4() || IsTor() || IsI2P()) {
1170 return ToStringIP() + ":" + ToStringPort();
1172 return "[" + ToStringIP() + "]:" + ToStringPort();
1176 std::string CService::ToString() const
1178 return ToStringIPPort();
1181 void CService::print() const
1183 printf("CService(%s)\n", ToString().c_str());
1186 void CService::SetPort(unsigned short portIn)