Source code of Windows XP (NT5)
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/*
* TPKT_Send_Setup * TPKT_Send_Setup should be called before a TPKT message is sent. It fills in the TPKT * header in the message. The caller passes TPKT_Send_Setup the wsabuf array before it is * passed to Winsock to be sent. The caller must allocate an extra TPKT_HEADER_SIZE bytes * at the beginning of the first buffer in the wsabuf, which TPKT_Send_Setup can fill in. * The length of the buffer specified in wsabuf must include these bytes. TPKT_Send_Setup * adds the len fields in the wsabuf array to compute the length of the message. * * TPKT_Receive_Init * TPKT_Receive_Init is called to begin receiving TPKT (RFC 1006) formatted data on a * connected socket. The socket must have been created as an overlapped socket, and must * have been connected before TPKT_Init is called. * * TPKT_RECEIVE_CALLBACK * Each complete TPKT message received on the socket is passed to the callback function * (which was passed to the TPKT_Receive_Init call). The TPKT header is not included. The * same callback function is called if there is an error in Winsock or an internal error in * the TPKT module. In this case, the buffer pointer will be NULL and the byte count * will be 0. When the socket is closed normally, the callback will be called with the * buffer pointer equal to NULL, the byte count equal to 0, and the error code equal to * NOERROR. * * TPKT_Receive_Close * TPKT_Receive_Close must be called *after* the socket has been closed, so that the TPKT * module can free its resources. The following procedure should be used to close a socket: * shutdown(s, SD_SEND); * (wait for TPKT receive callback with 0 bytes) * closesocket(s); * TPKT_Receive_Close(s); */
#ifndef TPKT_H
#define TPKT_H
#include <winsock2.h>
#define TPKT_HEADER_SIZE 4
typedef long HRESULT;typedef void (*TPKT_RECEIVE_CALLBACK)(SOCKET s, void *buf, unsigned long nbytes, HRESULT error);
void TPKT_Send_Setup(WSABUF *wsabuf, DWORD BufferCount);
HRESULT TPKT_Receive_Init(SOCKET s, TPKT_RECEIVE_CALLBACK callback);HRESULT TPKT_Receive_Close(SOCKET s);
#endif /* TPKT_H */
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