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 if (aiTrav->ai_family == AF_INET)
106 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
107 vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
111 if (aiTrav->ai_family == AF_INET6)
113 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
114 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)
132 strlcpy(psz, pszName, sizeof(psz));
133 if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
136 psz[strlen(psz)-1] = 0;
139 return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
142 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
144 return LookupHost(pszName, vIP, nMaxSolutions, false);
147 bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
151 int port = portDefault;
152 std::string hostname = "";
153 SplitHostPort(std::string(pszName), port, hostname);
155 std::vector<CNetAddr> vIP;
156 bool fRet = LookupIntern(hostname.c_str(), vIP, nMaxSolutions, fAllowLookup);
159 vAddr.resize(vIP.size());
160 for (unsigned int i = 0; i < vIP.size(); i++)
161 vAddr[i] = CService(vIP[i], port);
165 bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
167 std::vector<CService> vService;
168 bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
175 bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
177 return Lookup(pszName, addr, portDefault, false);
180 bool static Socks4(const CService &addrDest, SOCKET& hSocket)
182 printf("SOCKS4 connecting %s\n", addrDest.ToString().c_str());
183 if (!addrDest.IsIPv4())
185 closesocket(hSocket);
186 return error("Proxy destination is not IPv4");
188 char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
189 struct sockaddr_in addr;
190 socklen_t len = sizeof(addr);
191 if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET)
193 closesocket(hSocket);
194 return error("Cannot get proxy destination address");
196 memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
197 memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
198 char* pszSocks4 = pszSocks4IP;
199 int nSize = sizeof(pszSocks4IP);
201 int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
204 closesocket(hSocket);
205 return error("Error sending to proxy");
208 if (recv(hSocket, pchRet, 8, 0) != 8)
210 closesocket(hSocket);
211 return error("Error reading proxy response");
213 if (pchRet[1] != 0x5a)
215 closesocket(hSocket);
216 if (pchRet[1] != 0x5b)
217 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
220 printf("SOCKS4 connected %s\n", addrDest.ToString().c_str());
224 bool static Socks5(string strDest, int port, SOCKET& hSocket)
226 printf("SOCKS5 connecting %s\n", strDest.c_str());
227 if (strDest.size() > 255)
229 closesocket(hSocket);
230 return error("Hostname too long");
232 char pszSocks5Init[] = "\5\1\0";
233 char *pszSocks5 = pszSocks5Init;
234 ssize_t nSize = sizeof(pszSocks5Init) - 1;
236 ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
239 closesocket(hSocket);
240 return error("Error sending to proxy");
243 if (recv(hSocket, pchRet1, 2, 0) != 2)
245 closesocket(hSocket);
246 return error("Error reading proxy response");
248 if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00)
250 closesocket(hSocket);
251 return error("Proxy failed to initialize");
253 string strSocks5("\5\1");
254 strSocks5 += '\000'; strSocks5 += '\003';
255 strSocks5 += static_cast<char>(std::min((int)strDest.size(), 255));
256 strSocks5 += strDest;
257 strSocks5 += static_cast<char>((port >> 8) & 0xFF);
258 strSocks5 += static_cast<char>((port >> 0) & 0xFF);
259 ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL);
260 if (ret != (ssize_t)strSocks5.size())
262 closesocket(hSocket);
263 return error("Error sending to proxy");
266 if (recv(hSocket, pchRet2, 4, 0) != 4)
268 closesocket(hSocket);
269 return error("Error reading proxy response");
271 if (pchRet2[0] != 0x05)
273 closesocket(hSocket);
274 return error("Proxy failed to accept request");
276 if (pchRet2[1] != 0x00)
278 closesocket(hSocket);
281 case 0x01: return error("Proxy error: general failure");
282 case 0x02: return error("Proxy error: connection not allowed");
283 case 0x03: return error("Proxy error: network unreachable");
284 case 0x04: return error("Proxy error: host unreachable");
285 case 0x05: return error("Proxy error: connection refused");
286 case 0x06: return error("Proxy error: TTL expired");
287 case 0x07: return error("Proxy error: protocol error");
288 case 0x08: return error("Proxy error: address type not supported");
289 default: return error("Proxy error: unknown");
292 if (pchRet2[2] != 0x00)
294 closesocket(hSocket);
295 return error("Error: malformed proxy response");
300 case 0x01: ret = recv(hSocket, pchRet3, 4, 0) != 4; break;
301 case 0x04: ret = recv(hSocket, pchRet3, 16, 0) != 16; break;
304 ret = recv(hSocket, pchRet3, 1, 0) != 1;
306 return error("Error reading from proxy");
307 int nRecv = pchRet3[0];
308 ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv;
311 default: closesocket(hSocket); return error("Error: malformed proxy response");
315 closesocket(hSocket);
316 return error("Error reading from proxy");
318 if (recv(hSocket, pchRet3, 2, 0) != 2)
320 closesocket(hSocket);
321 return error("Error reading from proxy");
323 printf("SOCKS5 connected %s\n", strDest.c_str());
327 bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRet, int nTimeout)
329 hSocketRet = INVALID_SOCKET;
332 struct sockaddr_storage sockaddr;
334 struct sockaddr sockaddr;
336 socklen_t len = sizeof(sockaddr);
337 if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
338 printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
342 SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
343 if (hSocket == INVALID_SOCKET)
347 setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
351 u_long fNonblock = 1;
352 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
354 int fFlags = fcntl(hSocket, F_GETFL, 0);
355 if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
358 closesocket(hSocket);
362 if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
364 // WSAEINVAL is here because some legacy version of winsock uses it
365 if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
367 struct timeval timeout;
368 timeout.tv_sec = nTimeout / 1000;
369 timeout.tv_usec = (nTimeout % 1000) * 1000;
373 FD_SET(hSocket, &fdset);
374 int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
377 printf("connection timeout\n");
378 closesocket(hSocket);
381 if (nRet == SOCKET_ERROR)
383 printf("select() for connection failed: %i\n",WSAGetLastError());
384 closesocket(hSocket);
387 socklen_t nRetSize = sizeof(nRet);
389 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
391 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
394 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
395 closesocket(hSocket);
400 printf("connect() failed after select(): %s\n",strerror(nRet));
401 closesocket(hSocket);
406 else if (WSAGetLastError() != WSAEISCONN)
411 printf("connect() failed: %i\n",WSAGetLastError());
412 closesocket(hSocket);
417 // this isn't even strictly necessary
418 // CNode::ConnectNode immediately turns the socket back to non-blocking
419 // but we'll turn it back to blocking just in case
422 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
424 fFlags = fcntl(hSocket, F_GETFL, 0);
425 if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
428 closesocket(hSocket);
432 hSocketRet = hSocket;
436 bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) {
437 assert(net >= 0 && net < NET_MAX);
438 if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5)
440 if (nSocksVersion != 0 && !addrProxy.IsValid())
443 proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion);
447 bool GetProxy(enum Network net, proxyType &proxyInfoOut) {
448 assert(net >= 0 && net < NET_MAX);
450 if (!proxyInfo[net].second)
452 proxyInfoOut = proxyInfo[net];
456 bool SetNameProxy(CService addrProxy, int nSocksVersion) {
457 if (nSocksVersion != 0 && nSocksVersion != 5)
459 if (nSocksVersion != 0 && !addrProxy.IsValid())
462 nameproxyInfo = std::make_pair(addrProxy, nSocksVersion);
466 bool GetNameProxy(proxyType &nameproxyInfoOut) {
468 if (!nameproxyInfo.second)
470 nameproxyInfoOut = nameproxyInfo;
474 bool HaveNameProxy() {
476 return nameproxyInfo.second != 0;
479 bool IsProxy(const CNetAddr &addr) {
481 for (int i = 0; i < NET_MAX; i++) {
482 if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first))
488 bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
493 if (!GetProxy(addrDest.GetNetwork(), proxy))
494 return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout);
496 SOCKET hSocket = INVALID_SOCKET;
498 // first connect to proxy server
499 if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout))
502 // do socks negotiation
503 switch (proxy.second) {
505 if (!Socks4(addrDest, hSocket))
509 if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket))
516 hSocketRet = hSocket;
520 bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout)
523 int 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) {
544 case 4: return false;
546 if (!Socks5(strDest, port, hSocket))
551 hSocketRet = hSocket;
555 void CNetAddr::Init()
560 void CNetAddr::SetIP(const CNetAddr& ipIn)
562 memcpy(ip, ipIn.ip, sizeof(ip));
565 static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
566 static const unsigned char pchGarliCat[] = {0xFD,0x60,0xDB,0x4D,0xDD,0xB5};
568 bool CNetAddr::SetSpecial(const std::string &strName)
570 if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
571 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
572 if (vchAddr.size() != 16-sizeof(pchOnionCat))
574 memcpy(ip, pchOnionCat, sizeof(pchOnionCat));
575 for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++)
576 ip[i + sizeof(pchOnionCat)] = vchAddr[i];
579 if (strName.size()>11 && strName.substr(strName.size() - 11, 11) == ".oc.b32.i2p") {
580 std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 11).c_str());
581 if (vchAddr.size() != 16-sizeof(pchGarliCat))
583 memcpy(ip, pchOnionCat, sizeof(pchGarliCat));
584 for (unsigned int i=0; i<16-sizeof(pchGarliCat); i++)
585 ip[i + sizeof(pchGarliCat)] = vchAddr[i];
596 CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
598 memcpy(ip, pchIPv4, 12);
599 memcpy(ip+12, &ipv4Addr, 4);
603 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
605 memcpy(ip, &ipv6Addr, 16);
609 CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
612 std::vector<CNetAddr> vIP;
613 if (LookupHost(pszIp, vIP, 1, fAllowLookup))
617 CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
620 std::vector<CNetAddr> vIP;
621 if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
625 unsigned int CNetAddr::GetByte(int n) const
630 bool CNetAddr::IsIPv4() const
632 return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
635 bool CNetAddr::IsIPv6() const
637 return (!IsIPv4() && !IsTor() && !IsI2P());
640 bool CNetAddr::IsRFC1918() const
644 (GetByte(3) == 192 && GetByte(2) == 168) ||
645 (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
648 bool CNetAddr::IsRFC3927() const
650 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
653 bool CNetAddr::IsRFC3849() const
655 return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
658 bool CNetAddr::IsRFC3964() const
660 return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
663 bool CNetAddr::IsRFC6052() const
665 static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
666 return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
669 bool CNetAddr::IsRFC4380() const
671 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
674 bool CNetAddr::IsRFC4862() const
676 static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
677 return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
680 bool CNetAddr::IsRFC4193() const
682 return ((GetByte(15) & 0xFE) == 0xFC);
685 bool CNetAddr::IsRFC6145() const
687 static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
688 return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
691 bool CNetAddr::IsRFC4843() const
693 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
696 bool CNetAddr::IsTor() const
698 return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
701 bool CNetAddr::IsI2P() const
703 return (memcmp(ip, pchGarliCat, sizeof(pchGarliCat)) == 0);
706 bool CNetAddr::IsLocal() const
709 if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
712 // IPv6 loopback (::1/128)
713 static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
714 if (memcmp(ip, pchLocal, 16) == 0)
720 bool CNetAddr::IsMulticast() const
722 return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
723 || (GetByte(15) == 0xFF);
726 bool CNetAddr::IsValid() const
728 // Cleanup 3-byte shifted addresses caused by garbage in size field
729 // of addr messages from versions before 0.2.9 checksum.
730 // Two consecutive addr messages look like this:
731 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
732 // so if the first length field is garbled, it reads the second batch
733 // of addr misaligned by 3 bytes.
734 if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
737 // unspecified IPv6 address (::/128)
738 unsigned char ipNone[16] = {};
739 if (memcmp(ip, ipNone, 16) == 0)
742 // documentation IPv6 address
749 uint32_t ipNone = INADDR_NONE;
750 if (memcmp(ip+12, &ipNone, 4) == 0)
755 if (memcmp(ip+12, &ipNone, 4) == 0)
762 bool CNetAddr::IsRoutable() const
764 return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || (IsRFC4193() && !IsTor() && !IsI2P()) || IsRFC4843() || IsLocal());
767 enum Network CNetAddr::GetNetwork() const
770 return NET_UNROUTABLE;
784 std::string CNetAddr::ToStringIP() const
787 return EncodeBase32(&ip[6], 10) + ".onion";
789 return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
790 CService serv(*this, 0);
792 struct sockaddr_storage sockaddr;
794 struct sockaddr sockaddr;
796 socklen_t socklen = sizeof(sockaddr);
797 if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
798 char name[1025] = "";
799 if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST))
800 return std::string(name);
803 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
805 return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
806 GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
807 GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
808 GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
809 GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
812 std::string CNetAddr::ToString() const
817 bool operator==(const CNetAddr& a, const CNetAddr& b)
819 return (memcmp(a.ip, b.ip, 16) == 0);
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 CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
836 memcpy(pipv4Addr, ip+12, 4);
841 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
843 memcpy(pipv6Addr, ip, 16);
848 // get canonical identifier of an address' group
849 // no two connections will be attempted to addresses with the same group
850 std::vector<unsigned char> CNetAddr::GetGroup() const
852 std::vector<unsigned char> vchRet;
853 int nClass = NET_IPV6;
857 // all local addresses belong to the same group
864 // all unroutable addresses belong to the same group
867 nClass = NET_UNROUTABLE;
870 // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
871 // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
872 else if (IsIPv4() || IsRFC6145() || IsRFC6052())
877 // for 6to4 tunnelled addresses, use the encapsulated IPv4 address
878 else if (IsRFC3964())
883 // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
884 else if (IsRFC4380())
886 vchRet.push_back(NET_IPV4);
887 vchRet.push_back(GetByte(3) ^ 0xFF);
888 vchRet.push_back(GetByte(2) ^ 0xFF);
903 // for he.net, use /36 groups
904 else if (GetByte(15) == 0x20 && GetByte(14) == 0x11 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
906 // for the rest of the IPv6 network, use /32 groups
910 vchRet.push_back(nClass);
913 vchRet.push_back(GetByte(15 - nStartByte));
918 vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
923 uint64 CNetAddr::GetHash() const
925 uint256 hash = Hash(&ip[0], &ip[16]);
927 memcpy(&nRet, &hash, sizeof(nRet));
931 void CNetAddr::print() const
933 printf("CNetAddr(%s)\n", ToString().c_str());
936 // private extensions to enum Network, only returned by GetExtNetwork,
937 // and only used in GetReachabilityFrom
938 static const int NET_UNKNOWN = NET_MAX + 0;
939 static const int NET_TEREDO = NET_MAX + 1;
940 int static GetExtNetwork(const CNetAddr *addr)
944 if (addr->IsRFC4380())
946 return addr->GetNetwork();
949 /** Calculates a metric for how reachable (*this) is from a given partner */
950 int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const
963 return REACH_UNREACHABLE;
965 int ourNet = GetExtNetwork(this);
966 int theirNet = GetExtNetwork(paddrPartner);
967 bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145();
972 default: return REACH_DEFAULT;
973 case NET_IPV4: return REACH_IPV4;
977 default: return REACH_DEFAULT;
978 case NET_TEREDO: return REACH_TEREDO;
979 case NET_IPV4: return REACH_IPV4;
980 case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled
984 default: return REACH_DEFAULT;
985 case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well
986 case NET_TOR: return REACH_PRIVATE;
990 default: return REACH_DEFAULT;
991 case NET_I2P: return REACH_PRIVATE;
995 default: return REACH_DEFAULT;
996 case NET_TEREDO: return REACH_TEREDO;
997 case NET_IPV6: return REACH_IPV6_WEAK;
998 case NET_IPV4: return REACH_IPV4;
1001 case NET_UNROUTABLE:
1004 default: return REACH_DEFAULT;
1005 case NET_TEREDO: return REACH_TEREDO;
1006 case NET_IPV6: return REACH_IPV6_WEAK;
1007 case NET_IPV4: return REACH_IPV4;
1008 case NET_I2P: return REACH_PRIVATE; // assume connections from unroutable addresses are
1009 case NET_TOR: return REACH_PRIVATE; // either from Tor/I2P, or don't care about our address
1014 void CService::Init()
1019 CService::CService()
1024 CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
1028 CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
1033 CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
1038 CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
1040 assert(addr.sin_family == AF_INET);
1044 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
1046 assert(addr.sin6_family == AF_INET6);
1050 bool CService::SetSockAddr(const struct sockaddr *paddr)
1052 switch (paddr->sa_family) {
1054 *this = CService(*(const struct sockaddr_in*)paddr);
1058 *this = CService(*(const struct sockaddr_in6*)paddr);
1066 CService::CService(const char *pszIpPort, bool fAllowLookup)
1070 if (Lookup(pszIpPort, ip, 0, fAllowLookup))
1074 CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup)
1078 if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
1082 CService::CService(const std::string &strIpPort, bool fAllowLookup)
1086 if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
1090 CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup)
1094 if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
1098 unsigned short CService::GetPort() const
1103 bool operator==(const CService& a, const CService& b)
1105 return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
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 || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
1118 bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
1121 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in))
1123 *addrlen = sizeof(struct sockaddr_in);
1124 struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr;
1125 memset(paddrin, 0, *addrlen);
1126 if (!GetInAddr(&paddrin->sin_addr))
1128 paddrin->sin_family = AF_INET;
1129 paddrin->sin_port = htons(port);
1134 if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
1136 *addrlen = sizeof(struct sockaddr_in6);
1137 struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr;
1138 memset(paddrin6, 0, *addrlen);
1139 if (!GetIn6Addr(&paddrin6->sin6_addr))
1141 paddrin6->sin6_family = AF_INET6;
1142 paddrin6->sin6_port = htons(port);
1149 std::vector<unsigned char> CService::GetKey() const
1151 std::vector<unsigned char> vKey;
1153 memcpy(&vKey[0], ip, 16);
1154 vKey[16] = port / 0x100;
1155 vKey[17] = port & 0x0FF;
1159 std::string CService::ToStringPort() const
1161 return strprintf("%u", port);
1164 std::string CService::ToStringIPPort() const
1166 if (IsIPv4() || IsTor() || IsI2P()) {
1167 return ToStringIP() + ":" + ToStringPort();
1169 return "[" + ToStringIP() + "]:" + ToStringPort();
1173 std::string CService::ToString() const
1175 return ToStringIPPort();
1178 void CService::print() const
1180 printf("CService(%s)\n", ToString().c_str());
1183 void CService::SetPort(unsigned short portIn)