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;
25 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
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)
137 strlcpy(psz, pszName, sizeof(psz));
138 if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
141 psz[strlen(psz)-1] = 0;
144 return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
147 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
149 return LookupHost(pszName, vIP, nMaxSolutions, false);
152 bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
156 int port = portDefault;
157 std::string hostname = "";
158 SplitHostPort(std::string(pszName), port, hostname);
160 std::vector<CNetAddr> vIP;
161 bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
164 vAddr.resize(vIP.size());
165 for (unsigned int i = 0; i < vIP.size(); i++)
166 vAddr[i] = CService(vIP[i], port);
170 bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
172 std::vector<CService> vService;
173 bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
180 bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
182 return Lookup(pszName, addr, portDefault, false);
185 bool static Socks4(const CService &addrDest, SOCKET& hSocket)
187 printf("SOCKS4 connecting %s\n", addrDest.ToString().c_str());
188 if (!addrDest.IsIPv4())
190 closesocket(hSocket);
191 return error("Proxy destination is not IPv4");
193 char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
194 struct sockaddr_in addr;
195 socklen_t len = sizeof(addr);
196 if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET)
198 closesocket(hSocket);
199 return error("Cannot get proxy destination address");
201 memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
202 memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
203 char* pszSocks4 = pszSocks4IP;
204 int nSize = sizeof(pszSocks4IP);
206 int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
209 closesocket(hSocket);
210 return error("Error sending to proxy");
213 if (recv(hSocket, pchRet, 8, 0) != 8)
215 closesocket(hSocket);
216 return error("Error reading proxy response");
218 if (pchRet[1] != 0x5a)
220 closesocket(hSocket);
221 if (pchRet[1] != 0x5b)
222 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
225 printf("SOCKS4 connected %s\n", addrDest.ToString().c_str());
229 bool static Socks5(string strDest, int port, SOCKET& hSocket)
231 printf("SOCKS5 connecting %s\n", strDest.c_str());
232 if (strDest.size() > 255)
234 closesocket(hSocket);
235 return error("Hostname too long");
237 char pszSocks5Init[] = "\5\1\0";
238 char *pszSocks5 = pszSocks5Init;
239 ssize_t nSize = sizeof(pszSocks5Init) - 1;
241 ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
244 closesocket(hSocket);
245 return error("Error sending to proxy");
248 if (recv(hSocket, pchRet1, 2, 0) != 2)
250 closesocket(hSocket);
251 return error("Error reading proxy response");
253 if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00)
255 closesocket(hSocket);
256 return error("Proxy failed to initialize");
258 string strSocks5("\5\1");
259 strSocks5 += '\000'; strSocks5 += '\003';
260 strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255));
261 strSocks5 += strDest;
262 strSocks5 += static_cast<char>((port >> 8) & 0xFF);
263 strSocks5 += static_cast<char>((port >> 0) & 0xFF);
264 ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
265 if (ret != (ssize_t)strSocks5.size())
267 closesocket(hSocket);
268 return error("Error sending to proxy");
271 if (recv(hSocket, pchRet2, 4, 0) != 4)
273 closesocket(hSocket);
274 return error("Error reading proxy response");
276 if (pchRet2[0] != 0x05)
278 closesocket(hSocket);
279 return error("Proxy failed to accept request");
281 if (pchRet2[1] != 0x00)
283 closesocket(hSocket);
286 case 0x01: return error("Proxy error: general failure");
287 case 0x02: return error("Proxy error: connection not allowed");
288 case 0x03: return error("Proxy error: network unreachable");
289 case 0x04: return error("Proxy error: host unreachable");
290 case 0x05: return error("Proxy error: connection refused");
291 case 0x06: return error("Proxy error: TTL expired");
292 case 0x07: return error("Proxy error: protocol error");
293 case 0x08: return error("Proxy error: address type not supported");
294 default: return error("Proxy error: unknown");
297 if (pchRet2[2] != 0x00)
299 closesocket(hSocket);
300 return error("Error: malformed proxy response");
305 case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break;
306 case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break;
309 ret = recv(hSocket, pchRet3, 1, 0) != 1;
311 return error("Error reading from proxy");
312 int nRecv = pchRet3[0];
313 ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv;
316 default: closesocket(hSocket); return error("Error: malformed proxy response");
320 closesocket(hSocket);
321 return error("Error reading from proxy");
323 if (recv(hSocket, pchRet3, 2, 0) != 2)
325 closesocket(hSocket);
326 return error("Error reading from proxy");
328 printf("SOCKS5 connected %s\n", strDest.c_str());
332 bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout)
334 hSocketRet = INVALID_SOCKET;
337 struct sockaddr_storage sockaddr;
339 struct sockaddr sockaddr;
341 socklen_t len = sizeof(sockaddr);
342 if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
343 printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
347 SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
348 if (hSocket == INVALID_SOCKET)
352 setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
356 u_long fNonblock = 1;
357 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
359 int fFlags = fcntl(hSocket, F_GETFL, 0);
360 if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
363 closesocket(hSocket);
367 if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
369 // WSAEINVAL is here because some legacy version of winsock uses it
370 if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
372 struct timeval timeout;
373 timeout.tv_sec = nTimeout / 1000;
374 timeout.tv_usec = (nTimeout % 1000) * 1000;
378 FD_SET(hSocket, &fdset);
379 int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
382 printf("connection timeout\n");
383 closesocket(hSocket);
386 if (nRet == SOCKET_ERROR)
388 printf("select() for connection failed: %i\n",WSAGetLastError());
389 closesocket(hSocket);
392 socklen_t nRetSize = sizeof(nRet);
394 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
396 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
399 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
400 closesocket(hSocket);
405 printf("connect() failed after select(): %s\n",strerror(nRet));
406 closesocket(hSocket);
411 else if (WSAGetLastError() != WSAEISCONN)
416 printf("connect() failed: %i\n",WSAGetLastError());
417 closesocket(hSocket);
422 // this isn't even strictly necessary
423 // CNode::ConnectNode immediately turns the socket back to non-blocking
424 // but we'll turn it back to blocking just in case
427 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
429 fFlags = fcntl(hSocket, F_GETFL, 0);
430 if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
433 closesocket(hSocket);
437 hSocketRet = hSocket;
441 bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) {
442 assert(net >= 0 && net < NET_MAX);
443 if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5)
445 if (nSocksVersion != 0 && !addrProxy.IsValid())
448 proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion);
452 bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
453 assert(net >= 0 && net < NET_MAX);
455 if (!proxyInfo[net].second)
457 proxyInfoOut = proxyInfo[net];
461 bool SetNameProxy(CService addrProxy, int nSocksVersion) {
462 if (nSocksVersion != 0 && nSocksVersion != 5)
464 if (nSocksVersion != 0 && !addrProxy.IsValid())
467 nameproxyInfo = std::make_pair(addrProxy, nSocksVersion);
471 bool GetNameProxy(proxyType &nameproxyInfoOut) {
473 if (!nameproxyInfo.second)
475 nameproxyInfoOut = nameproxyInfo;
479 bool HaveNameProxy() {
481 return nameproxyInfo.second != 0;
484 bool IsProxy(const CNetAddr &addr) {
486 for (int i = 0; i < NET_MAX; i++) {
487 if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first))
493 bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
498 if (!GetProxy(addrDest.GetNetwork(), proxy))
499 return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout);
501 SOCKET hSocket = INVALID_SOCKET;
503 // first connect to proxy server
504 if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout))
507 // do socks negotiation
508 switch (proxy.second) {
510 if (!Socks4(addrDest, hSocket))
514 if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket))
521 hSocketRet = hSocket;
525 bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout)
528 int port = portDefault;
529 SplitHostPort(string(pszDest), port, strDest);
531 SOCKET hSocket = INVALID_SOCKET;
534 GetNameProxy(nameproxy);
536 CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port);
537 if (addrResolved.IsValid()) {
539 return ConnectSocket(addr, hSocketRet, nTimeout);
541 addr = CService("0.0.0.0:0");
542 if (!nameproxy.second)
544 if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout))
547 switch(nameproxy.second) {
549 case 4: return false;
551 if (!Socks5(strDest, port, hSocket))
556 hSocketRet = hSocket;
560 void CNetAddr::Init()
565 void CNetAddr::SetIP(const CNetAddr& ipIn)
567 memcpy(ip, ipIn.ip, sizeof(ip));
570 static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
571 static const unsigned char pchGarliCat[] = {0xFD,0x60,0xDB,0x4D,0xDD,0xB5};
573 bool CNetAddr::SetSpecial(const std::string &strName)
575 if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
576 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
577 if (vchAddr.size() != 16-sizeof(pchOnionCat))
579 memcpy(ip, pchOnionCat, sizeof(pchOnionCat));
580 for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++)
581 ip[i + sizeof(pchOnionCat)] = vchAddr[i];
584 if (strName.size()>11 && strName.substr(strName.size() - 11, 11) == ".oc.b32.i2p") {
585 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 11).c_str());
586 if (vchAddr.size() != 16-sizeof(pchGarliCat))
588 memcpy(ip, pchOnionCat, sizeof(pchGarliCat));
589 for (unsigned int i=0; i<16-sizeof(pchGarliCat); i++)
590 ip[i + sizeof(pchGarliCat)] = vchAddr[i];
601 CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
603 memcpy(ip, pchIPv4, 12);
604 memcpy(ip+12, &ipv4Addr, 4);
608 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
610 memcpy(ip, &ipv6Addr, 16);
614 CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
617 std::vector<CNetAddr> vIP;
618 if (LookupHost(pszIp, vIP, 1, fAllowLookup))
622 CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
625 std::vector<CNetAddr> vIP;
626 if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
630 unsigned int CNetAddr::GetByte(int n) const
635 bool CNetAddr::IsIPv4() const
637 return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
640 bool CNetAddr::IsIPv6() const
642 return (!IsIPv4() && !IsTor() && !IsI2P());
645 bool CNetAddr::IsRFC1918() const
649 (GetByte(3) == 192 && GetByte(2) == 168) ||
650 (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
653 bool CNetAddr::IsRFC3927() const
655 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
658 bool CNetAddr::IsRFC3849() const
660 return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
663 bool CNetAddr::IsRFC3964() const
665 return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
668 bool CNetAddr::IsRFC6052() const
670 static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
671 return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
674 bool CNetAddr::IsRFC4380() const
676 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
679 bool CNetAddr::IsRFC4862() const
681 static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
682 return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
685 bool CNetAddr::IsRFC4193() const
687 return ((GetByte(15) & 0xFE) == 0xFC);
690 bool CNetAddr::IsRFC6145() const
692 static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
693 return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
696 bool CNetAddr::IsRFC4843() const
698 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
701 bool CNetAddr::IsTor() const
703 return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
706 bool CNetAddr::IsI2P() const
708 return (memcmp(ip, pchGarliCat, sizeof(pchGarliCat)) == 0);
711 bool CNetAddr::IsLocal() const
714 if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
717 // IPv6 loopback (::1/128)
718 static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
719 if (memcmp(ip, pchLocal, 16) == 0)
725 bool CNetAddr::IsMulticast() const
727 return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
728 || (GetByte(15) == 0xFF);
731 bool CNetAddr::IsValid() const
733 // Cleanup 3-byte shifted addresses caused by garbage in size field
734 // of addr messages from versions before 0.2.9 checksum.
735 // Two consecutive addr messages look like this:
736 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
737 // so if the first length field is garbled, it reads the second batch
738 // of addr misaligned by 3 bytes.
739 if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
742 // unspecified IPv6 address (::/128)
743 unsigned char ipNone[16] = {};
744 if (memcmp(ip, ipNone, 16) == 0)
747 // documentation IPv6 address
754 uint32_t ipNone = INADDR_NONE;
755 if (memcmp(ip+12, &ipNone, 4) == 0)
760 if (memcmp(ip+12, &ipNone, 4) == 0)
767 bool CNetAddr::IsRoutable() const
769 return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || (IsRFC4193() && !IsTor() && !IsI2P()) || IsRFC4843() || IsLocal());
772 enum Network CNetAddr::GetNetwork() const
775 return NET_UNROUTABLE;
789 std::string CNetAddr::ToStringIP() const
792 return EncodeBase32(&ip[6], 10) + ".onion";
794 return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
795 CService serv(*this, 0);
797 struct sockaddr_storage sockaddr;
799 struct sockaddr sockaddr;
801 socklen_t socklen = sizeof(sockaddr);
802 if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
803 char name[1025] = "";
804 if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST))
805 return std::string(name);
808 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
810 return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
811 GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
812 GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
813 GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
814 GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
817 std::string CNetAddr::ToString() const
822 bool operator==(const CNetAddr& a, const CNetAddr& b)
824 return (memcmp(a.ip, b.ip, 16) == 0);
827 bool operator!=(const CNetAddr& a, const CNetAddr& b)
829 return (memcmp(a.ip, b.ip, 16) != 0);
832 bool operator<(const CNetAddr& a, const CNetAddr& b)
834 return (memcmp(a.ip, b.ip, 16) < 0);
837 bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
841 memcpy(pipv4Addr, ip+12, 4);
846 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
848 memcpy(pipv6Addr, ip, 16);
853 // get canonical identifier of an address' group
854 // no two connections will be attempted to addresses with the same group
855 std::vector<unsigned char> CNetAddr::GetGroup() const
857 std::vector<unsigned char> vchRet;
858 int nClass = NET_IPV6;
862 // all local addresses belong to the same group
869 // all unroutable addresses belong to the same group
872 nClass = NET_UNROUTABLE;
875 // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
876 // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
877 else if (IsIPv4() || IsRFC6145() || IsRFC6052())
882 // for 6to4 tunnelled addresses, use the encapsulated IPv4 address
883 else if (IsRFC3964())
888 // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
889 else if (IsRFC4380())
891 vchRet.push_back(NET_IPV4);
892 vchRet.push_back(GetByte(3) ^ 0xFF);
893 vchRet.push_back(GetByte(2) ^ 0xFF);
908 // for he.net, use /36 groups
909 else if (GetByte(15) == 0x20 && GetByte(14) == 0x11 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
911 // for the rest of the IPv6 network, use /32 groups
915 vchRet.push_back(nClass);
918 vchRet.push_back(GetByte(15 - nStartByte));
923 vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
928 uint64_t CNetAddr::GetHash() const
930 uint256 hash = Hash(&ip[0], &ip[16]);
932 memcpy(&nRet, &hash, sizeof(nRet));
936 void CNetAddr::print() const
938 printf("CNetAddr(%s)\n", ToString().c_str());
941 // private extensions to enum Network, only returned by GetExtNetwork,
942 // and only used in GetReachabilityFrom
943 static const int NET_UNKNOWN = NET_MAX + 0;
944 static const int NET_TEREDO = NET_MAX + 1;
945 int static GetExtNetwork(const CNetAddr *addr)
949 if (addr->IsRFC4380())
951 return addr->GetNetwork();
954 /** Calculates a metric for how reachable (*this) is from a given partner */
955 int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const
968 return REACH_UNREACHABLE;
970 int ourNet = GetExtNetwork(this);
971 int theirNet = GetExtNetwork(paddrPartner);
972 bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145();
977 default: return REACH_DEFAULT;
978 case NET_IPV4: return REACH_IPV4;
982 default: return REACH_DEFAULT;
983 case NET_TEREDO: return REACH_TEREDO;
984 case NET_IPV4: return REACH_IPV4;
985 case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled
989 default: return REACH_DEFAULT;
990 case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well
991 case NET_TOR: return REACH_PRIVATE;
995 default: return REACH_DEFAULT;
996 case NET_I2P: return REACH_PRIVATE;
1000 default: return REACH_DEFAULT;
1001 case NET_TEREDO: return REACH_TEREDO;
1002 case NET_IPV6: return REACH_IPV6_WEAK;
1003 case NET_IPV4: return REACH_IPV4;
1006 case NET_UNROUTABLE:
1009 default: return REACH_DEFAULT;
1010 case NET_TEREDO: return REACH_TEREDO;
1011 case NET_IPV6: return REACH_IPV6_WEAK;
1012 case NET_IPV4: return REACH_IPV4;
1013 case NET_I2P: return REACH_PRIVATE; // assume connections from unroutable addresses are
1014 case NET_TOR: return REACH_PRIVATE; // either from Tor/I2P, or don't care about our address
1019 void CService::Init()
1024 CService::CService()
1029 CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
1033 CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
1038 CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
1043 CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
1045 assert(addr.sin_family == AF_INET);
1049 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
1051 assert(addr.sin6_family == AF_INET6);
1055 bool CService::SetSockAddr(const struct sockaddr *paddr)
1057 switch (paddr->sa_family) {
1059 *this = CService(*(const struct sockaddr_in*)paddr);
1063 *this = CService(*(const struct sockaddr_in6*)paddr);
1071 CService::CService(const char *pszIpPort, bool fAllowLookup)
1075 if (Lookup(pszIpPort, ip, 0, fAllowLookup))
1079 CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup)
1083 if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
1087 CService::CService(const std::string &strIpPort, bool fAllowLookup)
1091 if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
1095 CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup)
1099 if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
1103 unsigned short CService::GetPort() const
1108 bool operator==(const CService& a, const CService& b)
1110 return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
1113 bool operator!=(const CService& a, const CService& b)
1115 return (CNetAddr)a != (CNetAddr)b || a.port != b.port;
1118 bool operator<(const CService& a, const CService& b)
1120 return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
1123 bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
1126 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in))
1128 *addrlen = sizeof(struct sockaddr_in);
1129 struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr;
1130 memset(paddrin, 0, *addrlen);
1131 if (!GetInAddr(&paddrin->sin_addr))
1133 paddrin->sin_family = AF_INET;
1134 paddrin->sin_port = htons(port);
1139 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
1141 *addrlen = sizeof(struct sockaddr_in6);
1142 struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr;
1143 memset(paddrin6, 0, *addrlen);
1144 if (!GetIn6Addr(&paddrin6->sin6_addr))
1146 paddrin6->sin6_family = AF_INET6;
1147 paddrin6->sin6_port = htons(port);
1154 std::vector<unsigned char> CService::GetKey() const
1156 std::vector<unsigned char> vKey;
1158 memcpy(&vKey[0], ip, 16);
1159 vKey[16] = port / 0x100;
1160 vKey[17] = port & 0x0FF;
1164 std::string CService::ToStringPort() const
1166 return strprintf("%u", port);
1169 std::string CService::ToStringIPPort() const
1171 if (IsIPv4() || IsTor() || IsI2P()) {
1172 return ToStringIP() + ":" + ToStringPort();
1174 return "[" + ToStringIP() + "]:" + ToStringPort();
1178 std::string CService::ToString() const
1180 return ToStringIPPort();
1183 void CService::print() const
1185 printf("CService(%s)\n", ToString().c_str());
1188 void CService::SetPort(unsigned short portIn)