86 lines
3.2 KiB
C
86 lines
3.2 KiB
C
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#ifndef cwTcpPort_H
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#define cwTcpPort_H
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namespace cw
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{
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namespace net
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{
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namespace socket
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{
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typedef handle<struct socket_str> handle_t;
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typedef unsigned short portNumber_t;
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enum
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{
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kNonBlockingFl = 0x00, // create a non-blocking socket
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kBlockingFl = 0x01, // create a blocking socket
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kTcpFl = 0x02, // create a TCP socket rather than a UDP socket
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kBroadcastFl = 0x04
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};
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enum
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{
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// port 0 is reserved by and is therefore a convenient invalid port number
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kInvalidPortNumber = 0
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};
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rc_t create( handle_t& hRef,
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portNumber_t port,
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unsigned flags,
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unsigned timeOutMs = 100, // time out to use with recv() on blocking sockets
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const char* remoteAddr = NULL,
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portNumber_t remotePort = socket::kInvalidPortNumber );
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rc_t destroy( handle_t& hRef );
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// Set a destination address for this socket. Once a destination address is set
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// the caller may use send() to communicate with the specified remote socket
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// without having to specify a destination address on each call.
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rc_t connect( handle_t h, const char* remoteAddr, portNumber_t port );
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// Send a message to a remote UDP socket over a previously connected socket
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rc_t send( handle_t h, const void* data, unsigned dataByteCnt );
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// Send a message to a specific remote node over an unconnected socket.
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// Use the function initAddr() to setup the 'sockaddr_in';
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rc_t send( handle_t h, const void* data, unsigned dataByteCnt, const struct sockaddr_in* remoteAddr );
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rc_t send( handle_t h, const void* data, unsigned dataByteCnt, const char* remoteAddr, portNumber_t port );
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// Receive incoming messages by directly checking the internal
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// socket for waiting data. This function is used to receive
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// incoming data when the internal listening thread is not used.
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// Note that if kBlockingFl was set in create() this call will
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// block for available data or for 'timeOutMs' milliseconds,
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// whichever comes first (as set in create()). If
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// kNonBlockingFl was set in create() then the function will
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// return immediately if no incoming messages are waiting. If
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// recvByteCntRef is valid (non-NULL) then it is set to the
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// length of the received message or 0 if no msg was received.
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rc_t recieve(handle_t h, char* data, unsigned dataByteCnt, unsigned* recvByteCntRef=nullptr, struct sockaddr_in* fromAddr=nullptr );
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//
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rc_t select_recieve(handle_t h, char* buf, unsigned bufByteCnt, unsigned timeOutMs, unsigned* recvByteCntRef=nullptr, struct sockaddr_in* fromAddr=nullptr );
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// Prepare a struct sockadddr_in for use with send()
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rc_t initAddr( handle_t h, const char* addrStr, portNumber_t portNumber, struct sockaddr_in* retAddrPtr );
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const char* addrToString( const struct sockaddr_in* addr, char* buf, unsigned bufN=INET_ADDRSTRLEN );
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bool addrIsEqual( const struct sockaddr_in* addr0, const struct sockaddr_in* addr1 );
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const char* hostName( handle_t h );
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}
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}
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}
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#endif
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