/*****************************************************************************Copyright (c) 2001 - 2008, The Board of Trustees of the University of Illinois.All rights reserved.Redistribution and use in source and binary forms, with or withoutmodification, are permitted provided that the following conditions aremet:* Redistributions of source code must retain the above  copyright notice, this list of conditions and the  following disclaimer.* Redistributions in binary form must reproduce the  above copyright notice, this list of conditions  and the following disclaimer in the documentation  and/or other materials provided with the distribution.* Neither the name of the University of Illinois  nor the names of its contributors may be used to  endorse or promote products derived from this  software without specific prior written permission.THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ASIS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULARPURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER ORCONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, ORPROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OFLIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDINGNEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THISSOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*****************************************************************************//*****************************************************************************written by   Yunhong Gu, last updated 12/01/2008*****************************************************************************/#ifndef __UDT_H__#define __UDT_H__#ifndef WIN32   #include <sys/types.h>   #include <sys/socket.h>   #include <netinet/in.h>#else   #include <windows.h>#endif#include <fstream>#include <set>#include <string>////////////////////////////////////////////////////////////////////////////////#ifdef WIN32   // Explicitly define 32-bit and 64-bit numbers   typedef __int32 int32_t;   typedef __int64 int64_t;   typedef unsigned __int32 uint32_t;   #if _MSC_VER >= 1300      typedef unsigned __int64 uint64_t;   #else      // VC 6.0 does not support unsigned __int64: may cause potential problems.      typedef __int64 uint64_t;   #endif   #ifdef UDT_EXPORTS      #define UDT_API __declspec(dllexport)   #else      #define UDT_API __declspec(dllimport)   #endif#else   #define UDT_API#endif#define NO_BUSY_WAITING#ifndef WIN32   typedef int UDPSOCKET;#else   typedef SOCKET UDPSOCKET;#endiftypedef int UDTSOCKET;typedef std::set<UDTSOCKET> ud_set;#define UD_CLR(u, uset) ((uset)->erase(u))#define UD_ISSET(u, uset) ((uset)->find(u) != (uset)->end())#define UD_SET(u, uset) ((uset)->insert(u))#define UD_ZERO(uset) ((uset)->clear())////////////////////////////////////////////////////////////////////////////////enum UDTOpt{   UDT_MSS,             // the Maximum Transfer Unit   UDT_SNDSYN,          // if sending is blocking   UDT_RCVSYN,          // if receiving is blocking   UDT_CC,              // custom congestion control algorithm   UDT_FC,		// Flight flag size (window size)   UDT_SNDBUF,          // maximum buffer in sending queue   UDT_RCVBUF,          // UDT receiving buffer size   UDT_LINGER,          // waiting for unsent data when closing   UDP_SNDBUF,          // UDP sending buffer size   UDP_RCVBUF,          // UDP receiving buffer size   UDT_MAXMSG,          // maximum datagram message size   UDT_MSGTTL,          // time-to-live of a datagram message   UDT_RENDEZVOUS,      // rendezvous connection mode   UDT_SNDTIMEO,        // send() timeout   UDT_RCVTIMEO,        // recv() timeout   UDT_REUSEADDR,	// reuse an existing port or create a new one   UDT_MAXBW		// maximum bandwidth (bps) that the connection can use};////////////////////////////////////////////////////////////////////////////////struct CPerfMon{   // global measurements   int64_t msTimeStamp;                 // time since the UDT entity is started, in milliseconds   int64_t pktSentTotal;                // total number of sent data packets, including retransmissions   int64_t pktRecvTotal;                // total number of received packets   int pktSndLossTotal;                 // total number of lost packets (sender side)   int pktRcvLossTotal;                 // total number of lost packets (receiver side)   int pktRetransTotal;                 // total number of retransmitted packets   int pktSentACKTotal;                 // total number of sent ACK packets   int pktRecvACKTotal;                 // total number of received ACK packets   int pktSentNAKTotal;                 // total number of sent NAK packets   int pktRecvNAKTotal;                 // total number of received NAK packets   // local measurements   int64_t pktSent;                     // number of sent data packets, including retransmissions   int64_t pktRecv;                     // number of received packets   int pktSndLoss;                      // number of lost packets (sender side)   int pktRcvLoss;                      // number of lost packets (receiverer side)   int pktRetrans;                      // number of retransmitted packets   int pktSentACK;                      // number of sent ACK packets   int pktRecvACK;                      // number of received ACK packets   int pktSentNAK;                      // number of sent NAK packets   int pktRecvNAK;                      // number of received NAK packets   double mbpsSendRate;                 // sending rate in Mb/s   double mbpsRecvRate;                 // receiving rate in Mb/s   // instant measurements   double usPktSndPeriod;               // packet sending period, in microseconds   int pktFlowWindow;                   // flow window size, in number of packets   int pktCongestionWindow;             // congestion window size, in number of packets   int pktFlightSize;                   // number of packets on flight   double msRTT;                        // RTT, in milliseconds   double mbpsBandwidth;                // estimated bandwidth, in Mb/s   int byteAvailSndBuf;                 // available UDT sender buffer size   int byteAvailRcvBuf;                 // available UDT receiver buffer size};////////////////////////////////////////////////////////////////////////////////class UDT_API CUDTException{public:   CUDTException(int major = 0, int minor = 0, int err = -1);   CUDTException(const CUDTException& e);   virtual ~CUDTException();      // Functionality:      //    Get the description of the exception.      // Parameters:      //    None.      // Returned value:      //    Text message for the exception description.   virtual const char* getErrorMessage();      // Functionality:      //    Get the system errno for the exception.      // Parameters:      //    None.      // Returned value:      //    errno.   virtual const int getErrorCode() const;      // Functionality:      //    Clear the error code.      // Parameters:      //    None.      // Returned value:      //    None.   virtual void clear();private:   int m_iMajor;        // major exception categories// 0: correct condition// 1: network setup exception// 2: network connection broken// 3: memory exception// 4: file exception// 5: method not supported// 6+: undefined error   int m_iMinor;		// for specific error reasons   int m_iErrno;		// errno returned by the system if there is any   std::string m_strMsg;	// text error messagepublic: // Error Code   static const int SUCCESS;   static const int ECONNSETUP;   static const int ENOSERVER;   static const int ECONNREJ;   static const int ESOCKFAIL;   static const int ESECFAIL;   static const int ECONNFAIL;   static const int ECONNLOST;   static const int ENOCONN;   static const int ERESOURCE;   static const int ETHREAD;   static const int ENOBUF;   static const int EFILE;   static const int EINVRDOFF;   static const int ERDPERM;   static const int EINVWROFF;   static const int EWRPERM;   static const int EINVOP;   static const int EBOUNDSOCK;   static const int ECONNSOCK;   static const int EINVPARAM;   static const int EINVSOCK;   static const int EUNBOUNDSOCK;   static const int ENOLISTEN;   static const int ERDVNOSERV;   static const int ERDVUNBOUND;   static const int ESTREAMILL;   static const int EDGRAMILL;   static const int EDUPLISTEN;   static const int ELARGEMSG;   static const int EASYNCFAIL;   static const int EASYNCSND;   static const int EASYNCRCV;   static const int EUNKNOWN;};////////////////////////////////////////////////////////////////////////////////namespace UDT{typedef CUDTException ERRORINFO;typedef UDTOpt SOCKOPT;typedef CPerfMon TRACEINFO;typedef ud_set UDSET;UDT_API extern const UDTSOCKET INVALID_SOCK;#undef ERRORUDT_API extern const int ERROR;UDT_API int startup();UDT_API int cleanup();UDT_API UDTSOCKET socket(int af, int type, int protocol);UDT_API int bind(UDTSOCKET u, const struct sockaddr* name, int namelen);UDT_API int bind(UDTSOCKET u, UDPSOCKET udpsock);UDT_API int listen(UDTSOCKET u, int backlog);UDT_API UDTSOCKET accept(UDTSOCKET u, struct sockaddr* addr, int* addrlen);UDT_API int connect(UDTSOCKET u, const struct sockaddr* name, int namelen);UDT_API int close(UDTSOCKET u);UDT_API int getpeername(UDTSOCKET u, struct sockaddr* name, int* namelen);UDT_API int getsockname(UDTSOCKET u, struct sockaddr* name, int* namelen);UDT_API int getsockopt(UDTSOCKET u, int level, SOCKOPT optname, void* optval, int* optlen);UDT_API int setsockopt(UDTSOCKET u, int level, SOCKOPT optname, const void* optval, int optlen);UDT_API int send(UDTSOCKET u, const char* buf, int len, int flags);UDT_API int recv(UDTSOCKET u, char* buf, int len, int flags);UDT_API int sendmsg(UDTSOCKET u, const char* buf, int len, int ttl = -1, bool inorder = false);UDT_API int recvmsg(UDTSOCKET u, char* buf, int len);UDT_API int64_t sendfile(UDTSOCKET u, std::ifstream& ifs, int64_t offset, int64_t size, int block = 364000);UDT_API int64_t recvfile(UDTSOCKET u, std::ofstream& ofs, int64_t offset, int64_t size, int block = 7280000);UDT_API int select(int nfds, UDSET* readfds, UDSET* writefds, UDSET* exceptfds, const struct timeval* timeout);UDT_API ERRORINFO& getlasterror();UDT_API int perfmon(UDTSOCKET u, TRACEINFO* perf, bool clear = true);}#endif