48 lines
2 KiB
C
48 lines
2 KiB
C
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/*
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* TPKT_Send_Setup
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* TPKT_Send_Setup should be called before a TPKT message is sent. It fills in the TPKT
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* header in the message. The caller passes TPKT_Send_Setup the wsabuf array before it is
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* passed to Winsock to be sent. The caller must allocate an extra TPKT_HEADER_SIZE bytes
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* at the beginning of the first buffer in the wsabuf, which TPKT_Send_Setup can fill in.
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* The length of the buffer specified in wsabuf must include these bytes. TPKT_Send_Setup
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* adds the len fields in the wsabuf array to compute the length of the message.
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*
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* TPKT_Receive_Init
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* TPKT_Receive_Init is called to begin receiving TPKT (RFC 1006) formatted data on a
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* connected socket. The socket must have been created as an overlapped socket, and must
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* have been connected before TPKT_Init is called.
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*
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* TPKT_RECEIVE_CALLBACK
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* Each complete TPKT message received on the socket is passed to the callback function
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* (which was passed to the TPKT_Receive_Init call). The TPKT header is not included. The
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* same callback function is called if there is an error in Winsock or an internal error in
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* the TPKT module. In this case, the buffer pointer will be NULL and the byte count
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* will be 0. When the socket is closed normally, the callback will be called with the
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* buffer pointer equal to NULL, the byte count equal to 0, and the error code equal to
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* NOERROR.
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*
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* TPKT_Receive_Close
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* TPKT_Receive_Close must be called *after* the socket has been closed, so that the TPKT
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* module can free its resources. The following procedure should be used to close a socket:
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* shutdown(s, SD_SEND);
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* (wait for TPKT receive callback with 0 bytes)
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* closesocket(s);
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* TPKT_Receive_Close(s);
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*/
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#ifndef TPKT_H
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#define TPKT_H
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#include <winsock2.h>
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#define TPKT_HEADER_SIZE 4
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typedef long HRESULT;
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typedef void (*TPKT_RECEIVE_CALLBACK)(SOCKET s, void *buf, unsigned long nbytes, HRESULT error);
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void TPKT_Send_Setup(WSABUF *wsabuf, DWORD BufferCount);
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HRESULT TPKT_Receive_Init(SOCKET s, TPKT_RECEIVE_CALLBACK callback);
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HRESULT TPKT_Receive_Close(SOCKET s);
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#endif /* TPKT_H */
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