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-rw-r--r--src/netbase.cpp715
1 files changed, 715 insertions, 0 deletions
diff --git a/src/netbase.cpp b/src/netbase.cpp
new file mode 100644
index 0000000000..2c4df7faf8
--- /dev/null
+++ b/src/netbase.cpp
@@ -0,0 +1,715 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2011 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+
+#include "netbase.h"
+#include "util.h"
+
+#ifndef WIN32
+#include <sys/fcntl.h>
+#endif
+
+#include "strlcpy.h"
+
+using namespace std;
+
+// Settings
+int fUseProxy = false;
+CService addrProxy("127.0.0.1",9050);
+int nConnectTimeout = 5000;
+
+
+static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
+
+bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutions, bool fAllowLookup)
+{
+ vIP.clear();
+ struct addrinfo aiHint = {};
+ aiHint.ai_socktype = SOCK_STREAM;
+ aiHint.ai_protocol = IPPROTO_TCP;
+#ifdef WIN32
+# ifdef USE_IPV6
+ aiHint.ai_family = AF_UNSPEC;
+ aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
+# else
+ aiHint.ai_family = AF_INET;
+ aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
+# endif
+#else
+# ifdef USE_IPV6
+ aiHint.ai_family = AF_UNSPEC;
+ aiHint.ai_flags = AI_ADDRCONFIG | (fAllowLookup ? 0 : AI_NUMERICHOST);
+# else
+ aiHint.ai_family = AF_INET;
+ aiHint.ai_flags = AI_ADDRCONFIG | (fAllowLookup ? 0 : AI_NUMERICHOST);
+# endif
+#endif
+ struct addrinfo *aiRes = NULL;
+ int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
+ if (nErr)
+ return false;
+
+ struct addrinfo *aiTrav = aiRes;
+ while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions))
+ {
+ if (aiTrav->ai_family == AF_INET)
+ {
+ assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
+ 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;
+ }
+
+ freeaddrinfo(aiRes);
+
+ return (vIP.size() > 0);
+}
+
+bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutions, bool fAllowLookup)
+{
+ if (pszName[0] == 0)
+ return false;
+ char psz[256];
+ char *pszHost = psz;
+ strlcpy(psz, pszName, sizeof(psz));
+ if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
+ {
+ pszHost = psz+1;
+ psz[strlen(psz)-1] = 0;
+ }
+
+ return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
+}
+
+bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, int nMaxSolutions)
+{
+ return LookupHost(pszName, vIP, nMaxSolutions, false);
+}
+
+bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
+{
+ if (pszName[0] == 0)
+ return false;
+ int port = portDefault;
+ char psz[256];
+ char *pszHost = psz;
+ strlcpy(psz, pszName, sizeof(psz));
+ char* pszColon = strrchr(psz+1,':');
+ char *pszPortEnd = NULL;
+ int portParsed = pszColon ? strtoul(pszColon+1, &pszPortEnd, 10) : 0;
+ if (pszColon && pszPortEnd && pszPortEnd[0] == 0)
+ {
+ if (psz[0] == '[' && pszColon[-1] == ']')
+ {
+ pszHost = psz+1;
+ pszColon[-1] = 0;
+ }
+ else
+ pszColon[0] = 0;
+ if (port >= 0 && port <= USHRT_MAX)
+ port = portParsed;
+ }
+ else
+ {
+ if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
+ {
+ pszHost = psz+1;
+ psz[strlen(psz)-1] = 0;
+ }
+
+ }
+
+ std::vector<CNetAddr> vIP;
+ bool fRet = LookupIntern(pszHost, vIP, 1, fAllowLookup);
+ if (!fRet)
+ return false;
+ addr = CService(vIP[0], port);
+ return true;
+}
+
+bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
+{
+ return Lookup(pszName, addr, portDefault, false);
+}
+
+bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
+{
+ hSocketRet = INVALID_SOCKET;
+
+ SOCKET hSocket = socket(AF_INET, 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
+
+ bool fProxy = (fUseProxy && addrDest.IsRoutable());
+ struct sockaddr_in sockaddr;
+ if (fProxy)
+ addrProxy.GetSockAddr(&sockaddr);
+ else
+ addrDest.GetSockAddr(&sockaddr);
+
+#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;
+ }
+
+
+ if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
+ {
+ // WSAEINVAL is here because some legacy version of winsock uses it
+ if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
+ {
+ struct timeval timeout;
+ timeout.tv_sec = nTimeout / 1000;
+ timeout.tv_usec = (nTimeout % 1000) * 1000;
+
+ fd_set fdset;
+ FD_ZERO(&fdset);
+ FD_SET(hSocket, &fdset);
+ int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
+ if (nRet == 0)
+ {
+ printf("connection timeout\n");
+ closesocket(hSocket);
+ return false;
+ }
+ if (nRet == SOCKET_ERROR)
+ {
+ printf("select() for connection failed: %i\n",WSAGetLastError());
+ closesocket(hSocket);
+ return false;
+ }
+ socklen_t nRetSize = sizeof(nRet);
+#ifdef WIN32
+ if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
+#else
+ if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
+#endif
+ {
+ printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
+ closesocket(hSocket);
+ return false;
+ }
+ if (nRet != 0)
+ {
+ printf("connect() failed after select(): %s\n",strerror(nRet));
+ closesocket(hSocket);
+ return false;
+ }
+ }
+#ifdef WIN32
+ else if (WSAGetLastError() != WSAEISCONN)
+#else
+ else
+#endif
+ {
+ printf("connect() failed: %i\n",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;
+ }
+
+ if (fProxy)
+ {
+ printf("proxy connecting %s\n", addrDest.ToString().c_str());
+ char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
+ struct sockaddr_in addr;
+ addrDest.GetSockAddr(&addr);
+ 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)
+ printf("ERROR: Proxy returned error %d\n", pchRet[1]);
+ return false;
+ }
+ printf("proxy connected %s\n", addrDest.ToString().c_str());
+ }
+
+ hSocketRet = hSocket;
+ return true;
+}
+
+void CNetAddr::Init()
+{
+ memset(ip, 0, 16);
+}
+
+void CNetAddr::SetIP(const CNetAddr& ipIn)
+{
+ memcpy(ip, ipIn.ip, sizeof(ip));
+}
+
+CNetAddr::CNetAddr()
+{
+ Init();
+}
+
+CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
+{
+ memcpy(ip, pchIPv4, 12);
+ memcpy(ip+12, &ipv4Addr, 4);
+}
+
+#ifdef USE_IPV6
+CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
+{
+ memcpy(ip, &ipv6Addr, 16);
+}
+#endif
+
+CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
+{
+ Init();
+ std::vector<CNetAddr> vIP;
+ if (LookupHost(pszIp, vIP, 1, fAllowLookup))
+ *this = vIP[0];
+}
+
+CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
+{
+ Init();
+ std::vector<CNetAddr> vIP;
+ if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
+ *this = vIP[0];
+}
+
+int CNetAddr::GetByte(int n) const
+{
+ return ip[15-n];
+}
+
+bool CNetAddr::IsIPv4() const
+{
+ return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
+}
+
+bool CNetAddr::IsRFC1918() const
+{
+ return IsIPv4() && (
+ GetByte(3) == 10 ||
+ (GetByte(3) == 192 && GetByte(2) == 168) ||
+ (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
+}
+
+bool CNetAddr::IsRFC3927() const
+{
+ return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
+}
+
+bool CNetAddr::IsRFC3849() const
+{
+ return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
+}
+
+bool CNetAddr::IsRFC3964() const
+{
+ return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
+}
+
+bool CNetAddr::IsRFC6052() const
+{
+ static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
+ return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
+}
+
+bool CNetAddr::IsRFC4380() const
+{
+ return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
+}
+
+bool CNetAddr::IsRFC4862() const
+{
+ static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
+ return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
+}
+
+bool CNetAddr::IsRFC4193() const
+{
+ return ((GetByte(15) & 0xFE) == 0xFC);
+}
+
+bool CNetAddr::IsRFC6145() const
+{
+ static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
+ return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
+}
+
+bool CNetAddr::IsRFC4843() const
+{
+ return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && GetByte(12) & 0xF0 == 0x10);
+}
+
+bool CNetAddr::IsLocal() const
+{
+ // IPv4 loopback
+ if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
+ return true;
+
+ // IPv6 loopback (::1/128)
+ static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
+ if (memcmp(ip, pchLocal, 16) == 0)
+ return true;
+
+ return false;
+}
+
+bool CNetAddr::IsMulticast() const
+{
+ return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
+ || (GetByte(15) == 0xFF);
+}
+
+bool CNetAddr::IsValid() const
+{
+ // Clean up 3-byte shifted addresses caused by garbage in size field
+ // of addr messages from versions before 0.2.9 checksum.
+ // Two consecutive addr messages look like this:
+ // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
+ // so if the first length field is garbled, it reads the second batch
+ // of addr misaligned by 3 bytes.
+ if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
+ return false;
+
+ // unspecified IPv6 address (::/128)
+ unsigned char ipNone[16] = {};
+ if (memcmp(ip, ipNone, 16) == 0)
+ return false;
+
+ // documentation IPv6 address
+ if (IsRFC3849())
+ return false;
+
+ if (IsIPv4())
+ {
+ // INADDR_NONE
+ uint32_t ipNone = INADDR_NONE;
+ if (memcmp(ip+12, &ipNone, 4) == 0)
+ return false;
+
+ // 0
+ ipNone = 0;
+ if (memcmp(ip+12, &ipNone, 4) == 0)
+ return false;
+ }
+
+ return true;
+}
+
+bool CNetAddr::IsRoutable() const
+{
+ return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || IsRFC4193() || IsRFC4843() || IsLocal());
+}
+
+std::string CNetAddr::ToStringIP() const
+{
+ if (IsIPv4())
+ return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
+ else
+ return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
+ GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
+ GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
+ GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
+ GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
+}
+
+std::string CNetAddr::ToString() const
+{
+ return ToStringIP();
+}
+
+bool operator==(const CNetAddr& a, const CNetAddr& b)
+{
+ return (memcmp(a.ip, b.ip, 16) == 0);
+}
+
+bool operator!=(const CNetAddr& a, const CNetAddr& b)
+{
+ return (memcmp(a.ip, b.ip, 16) != 0);
+}
+
+bool operator<(const CNetAddr& a, const CNetAddr& b)
+{
+ return (memcmp(a.ip, b.ip, 16) < 0);
+}
+
+bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
+{
+ if (!IsIPv4())
+ return false;
+ memcpy(pipv4Addr, ip+12, 4);
+ 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
+std::vector<unsigned char> CNetAddr::GetGroup() const
+{
+ std::vector<unsigned char> vchRet;
+ int nClass = 0; // 0=IPv6, 1=IPv4, 255=unroutable
+ int nStartByte = 0;
+ int nBits = 16;
+
+ // for unroutable addresses, each address is considered different
+ if (!IsRoutable())
+ {
+ nClass = 255;
+ nBits = 128;
+ }
+ // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
+ // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
+ else if (IsIPv4() || IsRFC6145() || IsRFC6052())
+ {
+ nClass = 1;
+ nStartByte = 12;
+ }
+ // for 6to4 tunneled addresses, use the encapsulated IPv4 address
+ else if (IsRFC3964())
+ {
+ nClass = 1;
+ nStartByte = 2;
+ }
+ // for Teredo-tunneled IPv6 addresses, use the encapsulated IPv4 address
+ else if (IsRFC4380())
+ {
+ vchRet.push_back(1);
+ vchRet.push_back(GetByte(3) ^ 0xFF);
+ vchRet.push_back(GetByte(2) ^ 0xFF);
+ return vchRet;
+ }
+ // for he.net, use /36 groups
+ else if (GetByte(15) == 0x20 && GetByte(14) == 0x11 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
+ nBits = 36;
+ // for the rest of the IPv6 network, use /32 groups
+ else
+ nBits = 32;
+
+ vchRet.push_back(nClass);
+ while (nBits >= 8)
+ {
+ vchRet.push_back(GetByte(15 - nStartByte));
+ nStartByte++;
+ nBits -= 8;
+ }
+ if (nBits > 0)
+ vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
+
+ return vchRet;
+}
+
+int64 CNetAddr::GetHash() const
+{
+ uint256 hash = Hash(&ip[0], &ip[16]);
+ int64 nRet;
+ memcpy(&nRet, &hash, sizeof(nRet));
+ return nRet;
+}
+
+void CNetAddr::print() const
+{
+ printf("CNetAddr(%s)\n", ToString().c_str());
+}
+
+void CService::Init()
+{
+ port = 0;
+}
+
+CService::CService()
+{
+ Init();
+}
+
+CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
+{
+}
+
+CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
+{
+}
+
+#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
+
+CService::CService(const char *pszIpPort, bool fAllowLookup)
+{
+ Init();
+ CService ip;
+ if (Lookup(pszIpPort, ip, 0, fAllowLookup))
+ *this = ip;
+}
+
+CService::CService(const char *pszIp, int portIn, bool fAllowLookup)
+{
+ std::vector<CNetAddr> ip;
+ if (LookupHost(pszIp, ip, 1, fAllowLookup))
+ *this = CService(ip[0], portIn);
+}
+
+CService::CService(const std::string &strIpPort, bool fAllowLookup)
+{
+ Init();
+ CService ip;
+ if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
+ *this = ip;
+}
+
+CService::CService(const std::string &strIp, int portIn, bool fAllowLookup)
+{
+ std::vector<CNetAddr> ip;
+ if (LookupHost(strIp.c_str(), ip, 1, fAllowLookup))
+ *this = CService(ip[0], portIn);
+}
+
+unsigned short CService::GetPort() const
+{
+ return port;
+}
+
+bool operator==(const CService& a, const CService& b)
+{
+ return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
+}
+
+bool operator!=(const CService& a, const CService& b)
+{
+ return (CNetAddr)a != (CNetAddr)b || a.port != b.port;
+}
+
+bool operator<(const CService& a, const CService& b)
+{
+ return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
+}
+
+bool CService::GetSockAddr(struct sockaddr_in* paddr) const
+{
+ if (!IsIPv4())
+ return false;
+ memset(paddr, 0, sizeof(struct sockaddr_in));
+ if (!GetInAddr(&paddr->sin_addr))
+ return false;
+ paddr->sin_family = AF_INET;
+ paddr->sin_port = htons(port);
+ return true;
+}
+
+#ifdef USE_IPV6
+bool CService::GetSockAddr6(struct sockaddr_in6* paddr) const
+{
+ memset(paddr, 0, sizeof(struct sockaddr_in6));
+ if (!GetIn6Addr(&paddr->sin6_addr))
+ return false;
+ paddr->sin6_family = AF_INET6;
+ paddr->sin6_port = htons(port);
+ return true;
+}
+#endif
+
+std::vector<unsigned char> CService::GetKey() const
+{
+ std::vector<unsigned char> vKey;
+ vKey.resize(18);
+ memcpy(&vKey[0], ip, 16);
+ vKey[16] = port / 0x100;
+ vKey[17] = port & 0x0FF;
+ return vKey;
+}
+
+std::string CService::ToStringPort() const
+{
+ return strprintf(":%i", port);
+}
+
+std::string CService::ToStringIPPort() const
+{
+ return ToStringIP() + ToStringPort();
+}
+
+std::string CService::ToString() const
+{
+ return ToStringIPPort();
+}
+
+void CService::print() const
+{
+ printf("CService(%s)\n", ToString().c_str());
+}
+
+void CService::SetPort(unsigned short portIn)
+{
+ port = portIn;
+}