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/*
* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/**
* @file
*
* Filter streams
*/
#include <stddef.h>
#include <errno.h>
#include <gpxe/stream.h>
#include <gpxe/filter.h>
/**
* Connection established
*
* @v app Stream application
*/
void filter_connected ( struct stream_application *app ) {
struct filter_stream *filter =
container_of ( app, struct filter_stream, downstream );
stream_connected ( &filter->upstream );
}
/**
* Connection closed
*
* @v app Stream application
* @v rc Error code, if any
*/
void filter_closed ( struct stream_application *app, int rc ) {
struct filter_stream *filter =
container_of ( app, struct filter_stream, downstream );
stream_closed ( &filter->upstream, rc );
}
/**
* Transmit data
*
* @v app Stream application
* @v buf Temporary data buffer
* @v len Length of temporary data buffer
*/
void filter_senddata ( struct stream_application *app,
void *data, size_t len ) {
struct filter_stream *filter =
container_of ( app, struct filter_stream, downstream );
stream_senddata ( &filter->upstream, data, len );
}
/**
* Transmitted data acknowledged
*
* @v app Stream application
* @v len Length of acknowledged data
*/
void filter_acked ( struct stream_application *app, size_t len ) {
struct filter_stream *filter =
container_of ( app, struct filter_stream, downstream );
stream_acked ( &filter->upstream, len );
}
/**
* Receive new data
*
* @v app Stream application
* @v data Data
* @v len Length of data
*/
void filter_newdata ( struct stream_application *app,
void *data, size_t len ) {
struct filter_stream *filter =
container_of ( app, struct filter_stream, downstream );
stream_newdata ( &filter->upstream, data, len );
}
/**
* Bind to local address
*
* @v conn Stream connection
* @v local Local address
* @ret rc Return status code
*/
int filter_bind ( struct stream_connection *conn, struct sockaddr *local ) {
struct filter_stream *filter =
container_of ( conn, struct filter_stream, upstream );
return stream_bind ( &filter->downstream, local );
}
/**
* Connect to remote address
*
* @v conn Stream connection
* @v peer Remote address
* @ret rc Return status code
*/
int filter_connect ( struct stream_connection *conn, struct sockaddr *peer ) {
struct filter_stream *filter =
container_of ( conn, struct filter_stream, upstream );
return stream_connect ( &filter->downstream, peer );
}
/**
* Close connection
*
* @v conn Stream connection
*/
void filter_close ( struct stream_connection *conn ) {
struct filter_stream *filter =
container_of ( conn, struct filter_stream, upstream );
stream_close ( &filter->downstream );
}
/**
* Send data via connection
*
* @v conn Stream connection
* @v data Data to send
* @v len Length of data
* @ret rc Return status code
*/
int filter_send ( struct stream_connection *conn, void *data, size_t len ) {
struct filter_stream *filter =
container_of ( conn, struct filter_stream, upstream );
return stream_send ( &filter->downstream, data, len );
}
/**
* Notify connection that data is available to send
*
* @v conn Stream connection
* @ret rc Return status code
*/
int filter_kick ( struct stream_connection *conn ) {
struct filter_stream *filter =
container_of ( conn, struct filter_stream, upstream );
return stream_kick ( &filter->downstream );
}
/**
* Insert filter into stream
*
* @v app Stream application
* @v filter Filter stream
* @ret rc Return status code
*/
int insert_filter ( struct stream_application *app,
struct filter_stream *filter ) {
struct stream_connection *conn = app->conn;
if ( ! conn ) {
DBGC ( filter, "Filter %p cannot insert onto closed stream\n",
filter );
return -ENOTCONN;
}
DBGC ( filter, "Filter %p inserted on stream %p\n", filter, app );
filter->upstream.app = app;
filter->downstream.conn = conn;
app->conn = &filter->upstream;
conn->app = &filter->downstream;
return 0;
}
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