diff options
Diffstat (limited to 'src/netbase.cpp')
| -rw-r--r-- | src/netbase.cpp | 497 |
1 files changed, 316 insertions, 181 deletions
diff --git a/src/netbase.cpp b/src/netbase.cpp index 2b300e5dd3..af6d11f0e2 100644 --- a/src/netbase.cpp +++ b/src/netbase.cpp @@ -3,6 +3,10 @@ // Distributed under the MIT/X11 software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. +#ifdef HAVE_CONFIG_H +#include "bitcoin-config.h" +#endif + #include "netbase.h" #include "hash.h" @@ -10,7 +14,14 @@ #include "uint256.h" #include "util.h" +#ifdef HAVE_GETADDRINFO_A +#include <netdb.h> +#endif + #ifndef WIN32 +#if HAVE_INET_PTON +#include <arpa/inet.h> +#endif #include <fcntl.h> #endif @@ -25,7 +36,7 @@ using namespace std; // Settings static proxyType proxyInfo[NET_MAX]; -static proxyType nameproxyInfo; +static CService nameProxy; static CCriticalSection cs_proxyInfos; int nConnectTimeout = 5000; bool fNameLookup = false; @@ -47,12 +58,10 @@ void SplitHostPort(std::string in, int &portOut, std::string &hostOut) { 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 bool fMultiColon = fHaveColon && (in.find_last_of(':',colon-1) != in.npos); if (fHaveColon && (colon==0 || fBracketed || !fMultiColon)) { - char *endp = NULL; - int n = strtol(in.c_str() + colon + 1, &endp, 10); - if (endp && *endp == 0 && n >= 0) { + int32_t n; + if (ParseInt32(in.substr(colon + 1), &n) && n > 0 && n < 0x10000) { in = in.substr(0, colon); - if (n > 0 && n < 0x10000) - portOut = n; + portOut = n; } } if (in.size()>0 && in[0] == '[' && in[in.size()-1] == ']') @@ -73,23 +82,65 @@ bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsign } } +#ifdef HAVE_GETADDRINFO_A + struct in_addr ipv4_addr; +#ifdef HAVE_INET_PTON + if (inet_pton(AF_INET, pszName, &ipv4_addr) > 0) { + vIP.push_back(CNetAddr(ipv4_addr)); + return true; + } + + struct in6_addr ipv6_addr; + if (inet_pton(AF_INET6, pszName, &ipv6_addr) > 0) { + vIP.push_back(CNetAddr(ipv6_addr)); + return true; + } +#else + ipv4_addr.s_addr = inet_addr(pszName); + if (ipv4_addr.s_addr != INADDR_NONE) { + vIP.push_back(CNetAddr(ipv4_addr)); + return true; + } +#endif +#endif + struct addrinfo aiHint; memset(&aiHint, 0, sizeof(struct addrinfo)); - aiHint.ai_socktype = SOCK_STREAM; aiHint.ai_protocol = IPPROTO_TCP; -#ifdef USE_IPV6 aiHint.ai_family = AF_UNSPEC; -#else - aiHint.ai_family = AF_INET; -#endif #ifdef WIN32 aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST; #else aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST; #endif + struct addrinfo *aiRes = NULL; +#ifdef HAVE_GETADDRINFO_A + struct gaicb gcb, *query = &gcb; + memset(query, 0, sizeof(struct gaicb)); + gcb.ar_name = pszName; + gcb.ar_request = &aiHint; + int nErr = getaddrinfo_a(GAI_NOWAIT, &query, 1, NULL); + if (nErr) + return false; + + do { + // Should set the timeout limit to a resonable value to avoid + // generating unnecessary checking call during the polling loop, + // while it can still response to stop request quick enough. + // 2 seconds looks fine in our situation. + struct timespec ts = { 2, 0 }; + gai_suspend(&query, 1, &ts); + boost::this_thread::interruption_point(); + + nErr = gai_error(query); + if (0 == nErr) + aiRes = query->ar_result; + } while (nErr == EAI_INPROGRESS); +#else int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes); +#endif if (nErr) return false; @@ -102,13 +153,11 @@ bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsign vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr)); } -#ifdef USE_IPV6 if (aiTrav->ai_family == AF_INET6) { assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6)); vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr)); } -#endif aiTrav = aiTrav->ai_next; } @@ -131,11 +180,6 @@ bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nM return LookupIntern(strHost.c_str(), vIP, nMaxSolutions, fAllowLookup); } -bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions) -{ - return LookupHost(pszName, vIP, nMaxSolutions, false); -} - bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions) { if (pszName[0] == 0) @@ -169,56 +213,12 @@ bool LookupNumeric(const char *pszName, CService& addr, int portDefault) return Lookup(pszName, addr, portDefault, false); } -bool static Socks4(const CService &addrDest, SOCKET& hSocket) -{ - LogPrintf("SOCKS4 connecting %s\n", addrDest.ToString()); - if (!addrDest.IsIPv4()) - { - closesocket(hSocket); - return error("Proxy destination is not IPv4"); - } - char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user"; - struct sockaddr_in addr; - socklen_t len = sizeof(addr); - if (!addrDest.GetSockAddr((struct sockaddr*)&addr, &len) || addr.sin_family != AF_INET) - { - closesocket(hSocket); - return error("Cannot get proxy destination address"); - } - memcpy(pszSocks4IP + 2, &addr.sin_port, 2); - memcpy(pszSocks4IP + 4, &addr.sin_addr, 4); - char* pszSocks4 = pszSocks4IP; - int nSize = sizeof(pszSocks4IP); - - int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL); - if (ret != nSize) - { - closesocket(hSocket); - return error("Error sending to proxy"); - } - char pchRet[8]; - if (recv(hSocket, pchRet, 8, 0) != 8) - { - closesocket(hSocket); - return error("Error reading proxy response"); - } - if (pchRet[1] != 0x5a) - { - closesocket(hSocket); - if (pchRet[1] != 0x5b) - LogPrintf("ERROR: Proxy returned error %d\n", pchRet[1]); - return false; - } - LogPrintf("SOCKS4 connected %s\n", addrDest.ToString()); - return true; -} - bool static Socks5(string strDest, int port, SOCKET& hSocket) { LogPrintf("SOCKS5 connecting %s\n", strDest); if (strDest.size() > 255) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Hostname too long"); } char pszSocks5Init[] = "\5\1\0"; @@ -227,18 +227,18 @@ bool static Socks5(string strDest, int port, SOCKET& hSocket) ssize_t ret = send(hSocket, pszSocks5Init, nSize, MSG_NOSIGNAL); if (ret != nSize) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Error sending to proxy"); } char pchRet1[2]; if (recv(hSocket, pchRet1, 2, 0) != 2) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Error reading proxy response"); } if (pchRet1[0] != 0x05 || pchRet1[1] != 0x00) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Proxy failed to initialize"); } string strSocks5("\5\1"); @@ -250,23 +250,23 @@ bool static Socks5(string strDest, int port, SOCKET& hSocket) ret = send(hSocket, strSocks5.c_str(), strSocks5.size(), MSG_NOSIGNAL); if (ret != (ssize_t)strSocks5.size()) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Error sending to proxy"); } char pchRet2[4]; if (recv(hSocket, pchRet2, 4, 0) != 4) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Error reading proxy response"); } if (pchRet2[0] != 0x05) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Proxy failed to accept request"); } if (pchRet2[1] != 0x00) { - closesocket(hSocket); + CloseSocket(hSocket); switch (pchRet2[1]) { case 0x01: return error("Proxy error: general failure"); @@ -282,7 +282,7 @@ bool static Socks5(string strDest, int port, SOCKET& hSocket) } if (pchRet2[2] != 0x00) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Error: malformed proxy response"); } char pchRet3[256]; @@ -294,23 +294,23 @@ bool static Socks5(string strDest, int port, SOCKET& hSocket) { ret = recv(hSocket, pchRet3, 1, 0) != 1; if (ret) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Error reading from proxy"); } int nRecv = pchRet3[0]; ret = recv(hSocket, pchRet3, nRecv, 0) != nRecv; break; } - default: closesocket(hSocket); return error("Error: malformed proxy response"); + default: CloseSocket(hSocket); return error("Error: malformed proxy response"); } if (ret) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Error reading from proxy"); } if (recv(hSocket, pchRet3, 2, 0) != 2) { - closesocket(hSocket); + CloseSocket(hSocket); return error("Error reading from proxy"); } LogPrintf("SOCKS5 connected %s\n", strDest); @@ -321,11 +321,7 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe { hSocketRet = INVALID_SOCKET; -#ifdef USE_IPV6 struct sockaddr_storage sockaddr; -#else - struct sockaddr sockaddr; -#endif socklen_t len = sizeof(sockaddr); if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) { LogPrintf("Cannot connect to %s: unsupported network\n", addrConnect.ToString()); @@ -335,27 +331,21 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe SOCKET hSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP); if (hSocket == INVALID_SOCKET) return false; + #ifdef SO_NOSIGPIPE int set = 1; setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int)); #endif -#ifdef WIN32 - u_long fNonblock = 1; - if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR) -#else - int fFlags = fcntl(hSocket, F_GETFL, 0); - if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1) -#endif - { - closesocket(hSocket); - return false; - } + // Set to non-blocking + if (!SetSocketNonBlocking(hSocket, true)) + return error("ConnectSocketDirectly: Setting socket to non-blocking failed, error %s\n", NetworkErrorString(WSAGetLastError())); if (connect(hSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR) { + int nErr = WSAGetLastError(); // WSAEINVAL is here because some legacy version of winsock uses it - if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL) + if (nErr == WSAEINPROGRESS || nErr == WSAEWOULDBLOCK || nErr == WSAEINVAL) { struct timeval timeout; timeout.tv_sec = nTimeout / 1000; @@ -368,13 +358,13 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe if (nRet == 0) { LogPrint("net", "connection to %s timeout\n", addrConnect.ToString()); - closesocket(hSocket); + CloseSocket(hSocket); return false; } if (nRet == SOCKET_ERROR) { - LogPrintf("select() for %s failed: %i\n", addrConnect.ToString(), WSAGetLastError()); - closesocket(hSocket); + LogPrintf("select() for %s failed: %s\n", addrConnect.ToString(), NetworkErrorString(WSAGetLastError())); + CloseSocket(hSocket); return false; } socklen_t nRetSize = sizeof(nRet); @@ -384,14 +374,14 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR) #endif { - LogPrintf("getsockopt() for %s failed: %i\n", addrConnect.ToString(), WSAGetLastError()); - closesocket(hSocket); + LogPrintf("getsockopt() for %s failed: %s\n", addrConnect.ToString(), NetworkErrorString(WSAGetLastError())); + CloseSocket(hSocket); return false; } if (nRet != 0) { - LogPrintf("connect() to %s failed after select(): %s\n", addrConnect.ToString(), strerror(nRet)); - closesocket(hSocket); + LogPrintf("connect() to %s failed after select(): %s\n", addrConnect.ToString(), NetworkErrorString(nRet)); + CloseSocket(hSocket); return false; } } @@ -401,78 +391,64 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe else #endif { - LogPrintf("connect() to %s failed: %i\n", addrConnect.ToString(), WSAGetLastError()); - closesocket(hSocket); + LogPrintf("connect() to %s failed: %s\n", addrConnect.ToString(), NetworkErrorString(WSAGetLastError())); + CloseSocket(hSocket); return false; } } - // this isn't even strictly necessary - // CNode::ConnectNode immediately turns the socket back to non-blocking - // but we'll turn it back to blocking just in case -#ifdef WIN32 - fNonblock = 0; - if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR) -#else - fFlags = fcntl(hSocket, F_GETFL, 0); - if (fcntl(hSocket, F_SETFL, fFlags & ~O_NONBLOCK) == SOCKET_ERROR) -#endif - { - closesocket(hSocket); - return false; - } + // This is required when using SOCKS5 proxy! + // CNode::ConnectNode turns the socket back to non-blocking. + if (!SetSocketNonBlocking(hSocket, false)) + return error("ConnectSocketDirectly: Setting socket to blocking failed, error %s\n", NetworkErrorString(WSAGetLastError())); hSocketRet = hSocket; return true; } -bool SetProxy(enum Network net, CService addrProxy, int nSocksVersion) { +bool SetProxy(enum Network net, CService addrProxy) { assert(net >= 0 && net < NET_MAX); - if (nSocksVersion != 0 && nSocksVersion != 4 && nSocksVersion != 5) - return false; - if (nSocksVersion != 0 && !addrProxy.IsValid()) + if (!addrProxy.IsValid()) return false; LOCK(cs_proxyInfos); - proxyInfo[net] = std::make_pair(addrProxy, nSocksVersion); + proxyInfo[net] = addrProxy; return true; } bool GetProxy(enum Network net, proxyType &proxyInfoOut) { assert(net >= 0 && net < NET_MAX); LOCK(cs_proxyInfos); - if (!proxyInfo[net].second) + if (!proxyInfo[net].IsValid()) return false; proxyInfoOut = proxyInfo[net]; return true; } -bool SetNameProxy(CService addrProxy, int nSocksVersion) { - if (nSocksVersion != 0 && nSocksVersion != 5) - return false; - if (nSocksVersion != 0 && !addrProxy.IsValid()) +bool SetNameProxy(CService addrProxy) { + if (!addrProxy.IsValid()) return false; LOCK(cs_proxyInfos); - nameproxyInfo = std::make_pair(addrProxy, nSocksVersion); + nameProxy = addrProxy; return true; } -bool GetNameProxy(proxyType &nameproxyInfoOut) { +bool GetNameProxy(CService &nameProxyOut) { LOCK(cs_proxyInfos); - if (!nameproxyInfo.second) + if(!nameProxy.IsValid()) return false; - nameproxyInfoOut = nameproxyInfo; + nameProxyOut = nameProxy; return true; } bool HaveNameProxy() { LOCK(cs_proxyInfos); - return nameproxyInfo.second != 0; + return nameProxy.IsValid(); } bool IsProxy(const CNetAddr &addr) { LOCK(cs_proxyInfos); for (int i = 0; i < NET_MAX; i++) { - if (proxyInfo[i].second && (addr == (CNetAddr)proxyInfo[i].first)) + if (addr == (CNetAddr)proxyInfo[i]) return true; } return false; @@ -481,31 +457,18 @@ bool IsProxy(const CNetAddr &addr) { bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout) { proxyType proxy; - - // no proxy needed + // no proxy needed (none set for target network) if (!GetProxy(addrDest.GetNetwork(), proxy)) return ConnectSocketDirectly(addrDest, hSocketRet, nTimeout); SOCKET hSocket = INVALID_SOCKET; // first connect to proxy server - if (!ConnectSocketDirectly(proxy.first, hSocket, nTimeout)) + if (!ConnectSocketDirectly(proxy, hSocket, nTimeout)) return false; - // do socks negotiation - switch (proxy.second) { - case 4: - if (!Socks4(addrDest, hSocket)) - return false; - break; - case 5: - if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket)) - return false; - break; - default: - closesocket(hSocket); + if (!Socks5(addrDest.ToStringIP(), addrDest.GetPort(), hSocket)) return false; - } hSocketRet = hSocket; return true; @@ -519,30 +482,25 @@ bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest SOCKET hSocket = INVALID_SOCKET; - proxyType nameproxy; - GetNameProxy(nameproxy); + CService nameProxy; + GetNameProxy(nameProxy); - CService addrResolved(CNetAddr(strDest, fNameLookup && !nameproxy.second), port); + CService addrResolved(CNetAddr(strDest, fNameLookup && !HaveNameProxy()), port); if (addrResolved.IsValid()) { addr = addrResolved; return ConnectSocket(addr, hSocketRet, nTimeout); } + addr = CService("0.0.0.0:0"); - if (!nameproxy.second) + + if (!HaveNameProxy()) return false; - if (!ConnectSocketDirectly(nameproxy.first, hSocket, nTimeout)) + // first connect to name proxy server + if (!ConnectSocketDirectly(nameProxy, hSocket, nTimeout)) + return false; + // do socks negotiation + if (!Socks5(strDest, (unsigned short)port, hSocket)) return false; - - switch(nameproxy.second) { - default: - case 4: - closesocket(hSocket); - return false; - case 5: - if (!Socks5(strDest, port, hSocket)) - return false; - break; - } hSocketRet = hSocket; return true; @@ -558,6 +516,22 @@ void CNetAddr::SetIP(const CNetAddr& ipIn) memcpy(ip, ipIn.ip, sizeof(ip)); } +void CNetAddr::SetRaw(Network network, const uint8_t *ip_in) +{ + switch(network) + { + case NET_IPV4: + memcpy(ip, pchIPv4, 12); + memcpy(ip+12, ip_in, 4); + break; + case NET_IPV6: + memcpy(ip, ip_in, 16); + break; + default: + assert(!"invalid network"); + } +} + static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43}; bool CNetAddr::SetSpecial(const std::string &strName) @@ -581,16 +555,13 @@ CNetAddr::CNetAddr() CNetAddr::CNetAddr(const struct in_addr& ipv4Addr) { - memcpy(ip, pchIPv4, 12); - memcpy(ip+12, &ipv4Addr, 4); + SetRaw(NET_IPV4, (const uint8_t*)&ipv4Addr); } -#ifdef USE_IPV6 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr) { - memcpy(ip, &ipv6Addr, 16); + SetRaw(NET_IPV6, (const uint8_t*)&ipv6Addr); } -#endif CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup) { @@ -764,11 +735,7 @@ std::string CNetAddr::ToStringIP() const if (IsTor()) return EncodeBase32(&ip[6], 10) + ".onion"; CService serv(*this, 0); -#ifdef USE_IPV6 struct sockaddr_storage sockaddr; -#else - struct sockaddr sockaddr; -#endif socklen_t socklen = sizeof(sockaddr); if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) { char name[1025] = ""; @@ -813,13 +780,11 @@ bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const return true; } -#ifdef USE_IPV6 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const { memcpy(pipv6Addr, ip, 16); return true; } -#endif // get canonical identifier of an address' group // no two connections will be attempted to addresses with the same group @@ -993,23 +958,19 @@ CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNet { } -#ifdef USE_IPV6 CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn) { } -#endif CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port)) { assert(addr.sin_family == AF_INET); } -#ifdef USE_IPV6 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port)) { assert(addr.sin6_family == AF_INET6); } -#endif bool CService::SetSockAddr(const struct sockaddr *paddr) { @@ -1017,11 +978,9 @@ bool CService::SetSockAddr(const struct sockaddr *paddr) case AF_INET: *this = CService(*(const struct sockaddr_in*)paddr); return true; -#ifdef USE_IPV6 case AF_INET6: *this = CService(*(const struct sockaddr_in6*)paddr); return true; -#endif default: return false; } @@ -1093,7 +1052,6 @@ bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const paddrin->sin_port = htons(port); return true; } -#ifdef USE_IPV6 if (IsIPv6()) { if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6)) return false; @@ -1106,7 +1064,6 @@ bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const paddrin6->sin6_port = htons(port); return true; } -#endif return false; } @@ -1148,3 +1105,181 @@ void CService::SetPort(unsigned short portIn) { port = portIn; } + +CSubNet::CSubNet(): + valid(false) +{ + memset(netmask, 0, sizeof(netmask)); +} + +CSubNet::CSubNet(const std::string &strSubnet, bool fAllowLookup) +{ + size_t slash = strSubnet.find_last_of('/'); + std::vector<CNetAddr> vIP; + + valid = true; + // Default to /32 (IPv4) or /128 (IPv6), i.e. match single address + memset(netmask, 255, sizeof(netmask)); + + std::string strAddress = strSubnet.substr(0, slash); + if (LookupHost(strAddress.c_str(), vIP, 1, fAllowLookup)) + { + network = vIP[0]; + if (slash != strSubnet.npos) + { + std::string strNetmask = strSubnet.substr(slash + 1); + int32_t n; + // IPv4 addresses start at offset 12, and first 12 bytes must match, so just offset n + int noffset = network.IsIPv4() ? (12 * 8) : 0; + if (ParseInt32(strNetmask, &n)) // If valid number, assume /24 symtex + { + if(n >= 0 && n <= (128 - noffset)) // Only valid if in range of bits of address + { + n += noffset; + // Clear bits [n..127] + for (; n < 128; ++n) + netmask[n>>3] &= ~(1<<(n&7)); + } + else + { + valid = false; + } + } + else // If not a valid number, try full netmask syntax + { + if (LookupHost(strNetmask.c_str(), vIP, 1, false)) // Never allow lookup for netmask + { + // Remember: GetByte returns bytes in reversed order + // Copy only the *last* four bytes in case of IPv4, the rest of the mask should stay 1's as + // we don't want pchIPv4 to be part of the mask. + int asize = network.IsIPv4() ? 4 : 16; + for(int x=0; x<asize; ++x) + netmask[15-x] = vIP[0].GetByte(x); + } + else + { + valid = false; + } + } + } + } + else + { + valid = false; + } +} + +bool CSubNet::Match(const CNetAddr &addr) const +{ + if (!valid || !addr.IsValid()) + return false; + for(int x=0; x<16; ++x) + if ((addr.GetByte(x) & netmask[15-x]) != network.GetByte(x)) + return false; + return true; +} + +std::string CSubNet::ToString() const +{ + std::string strNetmask; + if (network.IsIPv4()) + strNetmask = strprintf("%u.%u.%u.%u", netmask[12], netmask[13], netmask[14], netmask[15]); + else + strNetmask = strprintf("%x:%x:%x:%x:%x:%x:%x:%x", + netmask[0] << 8 | netmask[1], netmask[2] << 8 | netmask[3], + netmask[4] << 8 | netmask[5], netmask[6] << 8 | netmask[7], + netmask[8] << 8 | netmask[9], netmask[10] << 8 | netmask[11], + netmask[12] << 8 | netmask[13], netmask[14] << 8 | netmask[15]); + return network.ToString() + "/" + strNetmask; +} + +bool CSubNet::IsValid() const +{ + return valid; +} + +bool operator==(const CSubNet& a, const CSubNet& b) +{ + return a.valid == b.valid && a.network == b.network && !memcmp(a.netmask, b.netmask, 16); +} + +bool operator!=(const CSubNet& a, const CSubNet& b) +{ + return !(a==b); +} + +#ifdef WIN32 +std::string NetworkErrorString(int err) +{ + char buf[256]; + buf[0] = 0; + if(FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_MAX_WIDTH_MASK, + NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + buf, sizeof(buf), NULL)) + { + return strprintf("%s (%d)", buf, err); + } + else + { + return strprintf("Unknown error (%d)", err); + } +} +#else +std::string NetworkErrorString(int err) +{ + char buf[256]; + const char *s = buf; + buf[0] = 0; + /* Too bad there are two incompatible implementations of the + * thread-safe strerror. */ +#ifdef STRERROR_R_CHAR_P /* GNU variant can return a pointer outside the passed buffer */ + s = strerror_r(err, buf, sizeof(buf)); +#else /* POSIX variant always returns message in buffer */ + if (strerror_r(err, buf, sizeof(buf))) + buf[0] = 0; +#endif + return strprintf("%s (%d)", s, err); +} +#endif + +bool CloseSocket(SOCKET& hSocket) +{ + if (hSocket == INVALID_SOCKET) + return false; +#ifdef WIN32 + int ret = closesocket(hSocket); +#else + int ret = close(hSocket); +#endif + hSocket = INVALID_SOCKET; + return ret != SOCKET_ERROR; +} + +bool SetSocketNonBlocking(SOCKET& hSocket, bool fNonBlocking) +{ + if (fNonBlocking) { +#ifdef WIN32 + u_long nOne = 1; + if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR) { +#else + int fFlags = fcntl(hSocket, F_GETFL, 0); + if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == SOCKET_ERROR) { +#endif + CloseSocket(hSocket); + return false; + } + } else { +#ifdef WIN32 + u_long nZero = 0; + if (ioctlsocket(hSocket, FIONBIO, &nZero) == SOCKET_ERROR) { +#else + int fFlags = fcntl(hSocket, F_GETFL, 0); + if (fcntl(hSocket, F_SETFL, fFlags & ~O_NONBLOCK) == SOCKET_ERROR) { +#endif + CloseSocket(hSocket); + return false; + } + } + + return true; +} |