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#ifndef _TCP_H
#define _TCP_H
/** @file
*
* TCP protocol
*
* This file defines the gPXE TCP API.
*
*/
#include <stddef.h>
#include <gpxe/in.h>
struct tcp_connection;
/**
* TCP operations
*
*/
struct tcp_operations {
/**
* Connection aborted (RST received)
*
* @v conn TCP connection
*/
void ( * aborted ) ( struct tcp_connection *conn );
/**
* Connection timed out
*
* @v conn TCP connection
*/
void ( * timedout ) ( struct tcp_connection *conn );
/**
* Connection aborted (FIN received)
*
* @v conn TCP connection
*
* Note that acked() and newdata() may be called after
* closed(), if the packet containing the FIN also
* acknowledged data or contained new data.
*/
void ( * closed ) ( struct tcp_connection *conn );
/**
* Connection established (SYNACK received)
*
* @v conn TCP connection
*/
void ( * connected ) ( struct tcp_connection *conn );
/**
* Data acknowledged
*
* @v conn TCP connection
* @v len Length of acknowledged data
*
* @c len is guaranteed to not exceed the outstanding amount
* of unacknowledged data.
*/
void ( * acked ) ( struct tcp_connection *conn, size_t len );
/**
* New data received
*
* @v conn TCP connection
* @v data Data
* @v len Length of data
*/
void ( * newdata ) ( struct tcp_connection *conn,
void *data, size_t len );
/**
* Transmit data
*
* @v conn TCP connection
*
* The application should transmit whatever it currently wants
* to send using tcp_send(). If retransmissions are required,
* senddata() will be called again and the application must
* regenerate the data. The easiest way to implement this is
* to ensure that senddata() never changes the application's
* state.
*/
void ( * senddata ) ( struct tcp_connection *conn );
};
/**
* A TCP connection
*
*/
struct tcp_connection {
/** Address of the remote end of the connection */
struct sockaddr_in sin;
/** Operations table for this connection */
struct tcp_operations *tcp_op;
};
extern void *tcp_buffer;
extern size_t tcp_buflen;
extern int tcp_connect ( struct tcp_connection *conn );
extern void tcp_send ( struct tcp_connection *conn, const void *data,
size_t len );
extern void tcp_close ( struct tcp_connection *conn );
#endif /* _TCP_H */
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