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>
17 typedef SSIZE_T ssize_t;
21 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
26 static proxyType proxyInfo[NET_MAX];
27 static proxyType nameproxyInfo;
28 static CCriticalSection cs_proxyInfos;
29 int nConnectTimeout = 5000;
30 bool fNameLookup = false;
32 static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
34 enum Network ParseNetwork(std::string net) {
36 if (net == "ipv4") return NET_IPV4;
37 if (net == "ipv6") return NET_IPV6;
38 if (net == "tor") return NET_TOR;
39 if (net == "i2p") return NET_I2P;
40 return NET_UNROUTABLE;
43 void SplitHostPort(std::string in, int &portOut, std::string &hostOut) {
44 size_t colon = in.find_last_of(':');
45 // if a : is found, and it either follows a [...], or no other : is in the string, treat it as port separator
46 bool fHaveColon = colon != in.npos;
47 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
48 bool fMultiColon = fHaveColon && (in.find_last_of(':',colon-1) != in.npos);
49 if (fHaveColon && (colon==0 || fBracketed || !fMultiColon)) {
51 int n = strtol(in.c_str() + colon + 1, &endp, 10);
52 if (endp && *endp == 0 && n >= 0) {
53 in = in.substr(0, colon);
54 if (n > 0 && n < 0x10000)
58 if (in.size()>0 && in[0] == '[' && in[in.size()-1] == ']')
59 hostOut = in.substr(1, in.size()-2);
64 bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
70 if (addr.SetSpecial(std::string(pszName))) {
76 struct addrinfo aiHint;
77 memset(&aiHint, 0, sizeof(struct addrinfo));
79 aiHint.ai_socktype = SOCK_STREAM;
80 aiHint.ai_protocol = IPPROTO_TCP;
83 aiHint.ai_family = AF_UNSPEC;
85 aiHint.ai_family = AF_INET;
87 aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
90 aiHint.ai_family = AF_UNSPEC;
92 aiHint.ai_family = AF_INET;
94 aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
96 struct addrinfo *aiRes = NULL;
97 int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
101 struct addrinfo *aiTrav = aiRes;
102 while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions))
104 switch (aiTrav->ai_family)
107 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
108 vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
113 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
114 vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
119 aiTrav = aiTrav->ai_next;
124 return (vIP.size() > 0);
127 bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
133 strlcpy(psz, pszName, sizeof(psz));
134 if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
137 psz[strlen(psz)-1] = 0;
140 return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
143 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
145 return LookupHost(pszName, vIP, nMaxSolutions, false);
148 bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
152 int port = portDefault;
153 std::string hostname = "";
154 SplitHostPort(std::string(pszName), port, hostname);
156 std::vector<CNetAddr> vIP;
157 bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
160 vAddr.resize(vIP.size());
161 for (unsigned int i = 0; i < vIP.size(); i++)
162 vAddr[i] = CService(vIP[i], port);
166 bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
168 std::vector<CService> vService;
169 bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
176 bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
178 return Lookup(pszName, addr, portDefault, false);
181 bool static Socks4(const CService &addrDest, SOCKET& hSocket)
183 printf("SOCKS4 connecting %s\n", addrDest.ToString().c_str());
184 if (!addrDest.IsIPv4())
186 closesocket(hSocket);
187 return error("Proxy destination is not IPv4");
189 char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
190 struct sockaddr_in addr;
191 socklen_t len = sizeof(addr);
192 if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET)
194 closesocket(hSocket);
195 return error("Cannot get proxy destination address");
197 memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
198 memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
199 char* pszSocks4 = pszSocks4IP;
200 int nSize = sizeof(pszSocks4IP);
202 int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
205 closesocket(hSocket);
206 return error("Error sending to proxy");
209 if (recv(hSocket, pchRet, 8, 0) != 8)
211 closesocket(hSocket);
212 return error("Error reading proxy response");
214 if (pchRet[1] != 0x5a)
216 closesocket(hSocket);
217 if (pchRet[1] != 0x5b)
218 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
221 printf("SOCKS4 connected %s\n", addrDest.ToString().c_str());
225 bool static Socks5(string strDest, int port, SOCKET& hSocket)
227 printf("SOCKS5 connecting %s\n", strDest.c_str());
228 if (strDest.size() > 255)
230 closesocket(hSocket);
231 return error("Hostname too long");
233 char pszSocks5Init[] = "\5\1\0";
234 char *pszSocks5 = pszSocks5Init;
235 ssize_t nSize = sizeof(pszSocks5Init) - 1;
237 ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
240 closesocket(hSocket);
241 return error("Error sending to proxy");
244 if (recv(hSocket, pchRet1, 2, 0) != 2)
246 closesocket(hSocket);
247 return error("Error reading proxy response");
249 if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00)
251 closesocket(hSocket);
252 return error("Proxy failed to initialize");
254 string strSocks5("\5\1");
255 strSocks5 += '\000'; strSocks5 += '\003';
256 strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255));
257 strSocks5 += strDest;
258 strSocks5 += static_cast<char>((port >> 8) & 0xFF);
259 strSocks5 += static_cast<char>((port >> 0) & 0xFF);
260 ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
261 if (ret != (ssize_t)strSocks5.size())
263 closesocket(hSocket);
264 return error("Error sending to proxy");
267 if (recv(hSocket, pchRet2, 4, 0) != 4)
269 closesocket(hSocket);
270 return error("Error reading proxy response");
272 if (pchRet2[0] != 0x05)
274 closesocket(hSocket);
275 return error("Proxy failed to accept request");
277 if (pchRet2[1] != 0x00)
279 closesocket(hSocket);
282 case 0x01: return error("Proxy error: general failure");
283 case 0x02: return error("Proxy error: connection not allowed");
284 case 0x03: return error("Proxy error: network unreachable");
285 case 0x04: return error("Proxy error: host unreachable");
286 case 0x05: return error("Proxy error: connection refused");
287 case 0x06: return error("Proxy error: TTL expired");
288 case 0x07: return error("Proxy error: protocol error");
289 case 0x08: return error("Proxy error: address type not supported");
290 default: return error("Proxy error: unknown");
293 if (pchRet2[2] != 0x00)
295 closesocket(hSocket);
296 return error("Error: malformed proxy response");
301 case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break;
302 case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break;
305 ret = recv(hSocket, pchRet3, 1, 0) != 1;
307 return error("Error reading from proxy");
308 int nRecv = pchRet3[0];
309 ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv;
312 default: closesocket(hSocket); return error("Error: malformed proxy response");
316 closesocket(hSocket);
317 return error("Error reading from proxy");
319 if (recv(hSocket, pchRet3, 2, 0) != 2)
321 closesocket(hSocket);
322 return error("Error reading from proxy");
324 printf("SOCKS5 connected %s\n", strDest.c_str());
328 bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout)
330 hSocketRet = INVALID_SOCKET;
333 struct sockaddr_storage sockaddr;
335 struct sockaddr sockaddr;
337 socklen_t len = sizeof(sockaddr);
338 if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
339 printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
343 SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
344 if (hSocket == INVALID_SOCKET)
348 setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
352 u_long fNonblock = 1;
353 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
355 int fFlags = fcntl(hSocket, F_GETFL, 0);
356 if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
359 closesocket(hSocket);
363 if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
365 // WSAEINVAL is here because some legacy version of winsock uses it
366 if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
368 struct timeval timeout;
369 timeout.tv_sec = nTimeout / 1000;
370 timeout.tv_usec = (nTimeout % 1000) * 1000;
374 FD_SET(hSocket, &fdset);
375 int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
378 printf("connection timeout\n");
379 closesocket(hSocket);
382 if (nRet == SOCKET_ERROR)
384 printf("select() for connection failed: %i\n",WSAGetLastError());
385 closesocket(hSocket);
388 socklen_t nRetSize = sizeof(nRet);
390 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
392 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
395 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
396 closesocket(hSocket);
401 printf("connect() failed after select(): %s\n",strerror(nRet));
402 closesocket(hSocket);
407 else if (WSAGetLastError() != WSAEISCONN)
412 printf("connect() failed: %i\n",WSAGetLastError());
413 closesocket(hSocket);
418 // this isn't even strictly necessary
419 // CNode::ConnectNode immediately turns the socket back to non-blocking
420 // but we'll turn it back to blocking just in case
423 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
425 fFlags = fcntl(hSocket, F_GETFL, 0);
426 if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
429 closesocket(hSocket);
433 hSocketRet = hSocket;
437 bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) {
438 assert(net >= 0 && net < NET_MAX);
439 if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5)
441 if (nSocksVersion != 0 && !addrProxy.IsValid())
444 proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion);
448 bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
449 assert(net >= 0 && net < NET_MAX);
451 if (!proxyInfo[net].second)
453 proxyInfoOut = proxyInfo[net];
457 bool SetNameProxy(CService addrProxy, int nSocksVersion) {
458 if (nSocksVersion != 0 && nSocksVersion != 5)
460 if (nSocksVersion != 0 && !addrProxy.IsValid())
463 nameproxyInfo = std::make_pair(addrProxy, nSocksVersion);
467 bool GetNameProxy(proxyType &nameproxyInfoOut) {
469 if (!nameproxyInfo.second)
471 nameproxyInfoOut = nameproxyInfo;
475 bool HaveNameProxy() {
477 return nameproxyInfo.second != 0;
480 bool IsProxy(const CNetAddr &addr) {
482 for (int i = 0; i < NET_MAX; i++) {
483 if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first))
489 bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
494 if (!GetProxy(addrDest.GetNetwork(), proxy))
495 return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout);
497 SOCKET hSocket = INVALID_SOCKET;
499 // first connect to proxy server
500 if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout))
503 // do socks negotiation
504 switch (proxy.second) {
506 if (!Socks4(addrDest, hSocket))
510 if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket))
517 hSocketRet = hSocket;
521 bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout)
524 int port = portDefault;
525 SplitHostPort(string(pszDest), port, strDest);
527 SOCKET hSocket = INVALID_SOCKET;
530 GetNameProxy(nameproxy);
532 CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port);
533 if (addrResolved.IsValid()) {
535 return ConnectSocket(addr, hSocketRet, nTimeout);
537 addr = CService("0.0.0.0:0");
538 if (!nameproxy.second)
540 if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout))
543 switch(nameproxy.second) {
545 case 4: return false;
547 if (!Socks5(strDest, port, hSocket))
552 hSocketRet = hSocket;
556 void CNetAddr::Init()
561 void CNetAddr::SetIP(const CNetAddr& ipIn)
563 memcpy(ip, ipIn.ip, sizeof(ip));
566 static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
567 static const unsigned char pchGarliCat[] = {0xFD,0x60,0xDB,0x4D,0xDD,0xB5};
569 bool CNetAddr::SetSpecial(const std::string &strName)
571 if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
572 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
573 if (vchAddr.size() != 16-sizeof(pchOnionCat))
575 memcpy(ip, pchOnionCat, sizeof(pchOnionCat));
576 for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++)
577 ip[i + sizeof(pchOnionCat)] = vchAddr[i];
580 if (strName.size()>11 && strName.substr(strName.size() - 11, 11) == ".oc.b32.i2p") {
581 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 11).c_str());
582 if (vchAddr.size() != 16-sizeof(pchGarliCat))
584 memcpy(ip, pchOnionCat, sizeof(pchGarliCat));
585 for (unsigned int i=0; i<16-sizeof(pchGarliCat); i++)
586 ip[i + sizeof(pchGarliCat)] = vchAddr[i];
597 CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
599 memcpy(ip, pchIPv4, 12);
600 memcpy(ip+12, &ipv4Addr, 4);
604 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
606 memcpy(ip, &ipv6Addr, 16);
610 CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
613 std::vector<CNetAddr> vIP;
614 if (LookupHost(pszIp, vIP, 1, fAllowLookup))
618 CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
621 std::vector<CNetAddr> vIP;
622 if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
626 unsigned int CNetAddr::GetByte(int n) const
631 bool CNetAddr::IsIPv4() const
633 return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
636 bool CNetAddr::IsIPv6() const
638 return (!IsIPv4() && !IsTor() && !IsI2P());
641 bool CNetAddr::IsRFC1918() const
645 (GetByte(3) == 192 && GetByte(2) == 168) ||
646 (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
649 bool CNetAddr::IsRFC3927() const
651 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
654 bool CNetAddr::IsRFC3849() const
656 return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
659 bool CNetAddr::IsRFC3964() const
661 return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
664 bool CNetAddr::IsRFC6052() const
666 static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
667 return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
670 bool CNetAddr::IsRFC4380() const
672 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
675 bool CNetAddr::IsRFC4862() const
677 static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
678 return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
681 bool CNetAddr::IsRFC4193() const
683 return ((GetByte(15) & 0xFE) == 0xFC);
686 bool CNetAddr::IsRFC6145() const
688 static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
689 return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
692 bool CNetAddr::IsRFC4843() const
694 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
697 bool CNetAddr::IsTor() const
699 return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
702 bool CNetAddr::IsI2P() const
704 return (memcmp(ip, pchGarliCat, sizeof(pchGarliCat)) == 0);
707 bool CNetAddr::IsLocal() const
710 if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
713 // IPv6 loopback (::1/128)
714 static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
715 if (memcmp(ip, pchLocal, 16) == 0)
721 bool CNetAddr::IsMulticast() const
723 return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
724 || (GetByte(15) == 0xFF);
727 bool CNetAddr::IsValid() const
729 // Cleanup 3-byte shifted addresses caused by garbage in size field
730 // of addr messages from versions before 0.2.9 checksum.
731 // Two consecutive addr messages look like this:
732 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
733 // so if the first length field is garbled, it reads the second batch
734 // of addr misaligned by 3 bytes.
735 if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
738 // unspecified IPv6 address (::/128)
739 unsigned char ipNone[16] = {};
740 if (memcmp(ip, ipNone, 16) == 0)
743 // documentation IPv6 address
750 uint32_t ipNone = INADDR_NONE;
751 if (memcmp(ip+12, &ipNone, 4) == 0)
756 if (memcmp(ip+12, &ipNone, 4) == 0)
763 bool CNetAddr::IsRoutable() const
765 return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || (IsRFC4193() && !IsTor() && !IsI2P()) || IsRFC4843() || IsLocal());
768 enum Network CNetAddr::GetNetwork() const
771 return NET_UNROUTABLE;
785 std::string CNetAddr::ToStringIP() const
788 return EncodeBase32(&ip[6], 10) + ".onion";
790 return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
791 CService serv(*this, 0);
793 struct sockaddr_storage sockaddr;
795 struct sockaddr sockaddr;
797 socklen_t socklen = sizeof(sockaddr);
798 if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
799 char name[1025] = "";
800 if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST))
801 return std::string(name);
804 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
806 return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
807 GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
808 GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
809 GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
810 GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
813 std::string CNetAddr::ToString() const
818 bool operator==(const CNetAddr& a, const CNetAddr& b)
820 return (memcmp(a.ip, b.ip, 16) == 0);
823 bool operator!=(const CNetAddr& a, const CNetAddr& b)
825 return (memcmp(a.ip, b.ip, 16) != 0);
828 bool operator<(const CNetAddr& a, const CNetAddr& b)
830 return (memcmp(a.ip, b.ip, 16) < 0);
833 bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
837 memcpy(pipv4Addr, ip+12, 4);
842 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
844 memcpy(pipv6Addr, ip, 16);
849 // get canonical identifier of an address' group
850 // no two connections will be attempted to addresses with the same group
851 std::vector<unsigned char> CNetAddr::GetGroup() const
853 std::vector<unsigned char> vchRet;
854 int nClass = NET_IPV6;
858 // all local addresses belong to the same group
865 // all unroutable addresses belong to the same group
868 nClass = NET_UNROUTABLE;
871 // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
872 // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
873 else if (IsIPv4() || IsRFC6145() || IsRFC6052())
878 // for 6to4 tunnelled addresses, use the encapsulated IPv4 address
879 else if (IsRFC3964())
884 // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
885 else if (IsRFC4380())
887 vchRet.push_back(NET_IPV4);
888 vchRet.push_back(GetByte(3) ^ 0xFF);
889 vchRet.push_back(GetByte(2) ^ 0xFF);
904 // for he.net, use /36 groups
905 else if (GetByte(15) == 0x20 && GetByte(14) == 0x11 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
907 // for the rest of the IPv6 network, use /32 groups
911 vchRet.push_back(nClass);
914 vchRet.push_back(GetByte(15 - nStartByte));
919 vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
924 uint64_t CNetAddr::GetHash() const
926 uint256 hash = Hash(&ip[0], &ip[16]);
928 memcpy(&nRet, &hash, sizeof(nRet));
932 void CNetAddr::print() const
934 printf("CNetAddr(%s)\n", ToString().c_str());
937 // private extensions to enum Network, only returned by GetExtNetwork,
938 // and only used in GetReachabilityFrom
939 static const int NET_UNKNOWN = NET_MAX + 0;
940 static const int NET_TEREDO = NET_MAX + 1;
941 int static GetExtNetwork(const CNetAddr *addr)
945 if (addr->IsRFC4380())
947 return addr->GetNetwork();
950 /** Calculates a metric for how reachable (*this) is from a given partner */
951 int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const
964 return REACH_UNREACHABLE;
966 int ourNet = GetExtNetwork(this);
967 int theirNet = GetExtNetwork(paddrPartner);
968 bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145();
973 default: return REACH_DEFAULT;
974 case NET_IPV4: return REACH_IPV4;
978 default: return REACH_DEFAULT;
979 case NET_TEREDO: return REACH_TEREDO;
980 case NET_IPV4: return REACH_IPV4;
981 case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled
985 default: return REACH_DEFAULT;
986 case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well
987 case NET_TOR: return REACH_PRIVATE;
991 default: return REACH_DEFAULT;
992 case NET_I2P: return REACH_PRIVATE;
996 default: return REACH_DEFAULT;
997 case NET_TEREDO: return REACH_TEREDO;
998 case NET_IPV6: return REACH_IPV6_WEAK;
999 case NET_IPV4: return REACH_IPV4;
1002 case NET_UNROUTABLE:
1005 default: return REACH_DEFAULT;
1006 case NET_TEREDO: return REACH_TEREDO;
1007 case NET_IPV6: return REACH_IPV6_WEAK;
1008 case NET_IPV4: return REACH_IPV4;
1009 case NET_I2P: return REACH_PRIVATE; // assume connections from unroutable addresses are
1010 case NET_TOR: return REACH_PRIVATE; // either from Tor/I2P, or don't care about our address
1015 void CService::Init()
1020 CService::CService()
1025 CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
1029 CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
1034 CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
1039 CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
1041 assert(addr.sin_family == AF_INET);
1045 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
1047 assert(addr.sin6_family == AF_INET6);
1051 bool CService::SetSockAddr(const struct sockaddr *paddr)
1053 switch (paddr->sa_family) {
1055 *this = CService(*(const struct sockaddr_in*)paddr);
1059 *this = CService(*(const struct sockaddr_in6*)paddr);
1067 CService::CService(const char *pszIpPort, bool fAllowLookup)
1071 if (Lookup(pszIpPort, ip, 0, fAllowLookup))
1075 CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup)
1079 if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
1083 CService::CService(const std::string &strIpPort, bool fAllowLookup)
1087 if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
1091 CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup)
1095 if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
1099 unsigned short CService::GetPort() const
1104 bool operator==(const CService& a, const CService& b)
1106 return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
1109 bool operator!=(const CService& a, const CService& b)
1111 return (CNetAddr)a != (CNetAddr)b || a.port != b.port;
1114 bool operator<(const CService& a, const CService& b)
1116 return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
1119 bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
1122 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in))
1124 *addrlen = sizeof(struct sockaddr_in);
1125 struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr;
1126 memset(paddrin, 0, *addrlen);
1127 if (!GetInAddr(&paddrin->sin_addr))
1129 paddrin->sin_family = AF_INET;
1130 paddrin->sin_port = htons(port);
1135 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
1137 *addrlen = sizeof(struct sockaddr_in6);
1138 struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr;
1139 memset(paddrin6, 0, *addrlen);
1140 if (!GetIn6Addr(&paddrin6->sin6_addr))
1142 paddrin6->sin6_family = AF_INET6;
1143 paddrin6->sin6_port = htons(port);
1150 std::vector<unsigned char> CService::GetKey() const
1152 std::vector<unsigned char> vKey;
1154 memcpy(&vKey[0], ip, 16);
1155 vKey[16] = port / 0x100;
1156 vKey[17] = port & 0x0FF;
1160 std::string CService::ToStringPort() const
1162 return strprintf("%u", port);
1165 std::string CService::ToStringIPPort() const
1167 if (IsIPv4() || IsTor() || IsI2P()) {
1168 return ToStringIP() + ":" + ToStringPort();
1170 return "[" + ToStringIP() + "]:" + ToStringPort();
1174 std::string CService::ToString() const
1176 return ToStringIPPort();
1179 void CService::print() const
1181 printf("CService(%s)\n", ToString().c_str());
1184 void CService::SetPort(unsigned short portIn)