2007-01-30 13:17:03 +01:00
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/*
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/**
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* @file
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*
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* Filter streams
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*/
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#include <stddef.h>
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2007-01-31 04:04:56 +01:00
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#include <errno.h>
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2007-01-30 13:17:03 +01:00
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#include <gpxe/stream.h>
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#include <gpxe/filter.h>
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/**
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* Connection established
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*
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* @v app Stream application
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*/
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void filter_connected ( struct stream_application *app ) {
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struct filter_stream *filter =
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container_of ( app, struct filter_stream, downstream );
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stream_connected ( &filter->upstream );
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}
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/**
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* Connection closed
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*
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* @v app Stream application
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* @v rc Error code, if any
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*/
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void filter_closed ( struct stream_application *app, int rc ) {
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struct filter_stream *filter =
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container_of ( app, struct filter_stream, downstream );
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stream_closed ( &filter->upstream, rc );
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}
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/**
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* Transmit data
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*
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* @v app Stream application
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* @v buf Temporary data buffer
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* @v len Length of temporary data buffer
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*/
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void filter_senddata ( struct stream_application *app,
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void *data, size_t len ) {
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struct filter_stream *filter =
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container_of ( app, struct filter_stream, downstream );
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stream_senddata ( &filter->upstream, data, len );
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}
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/**
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* Transmitted data acknowledged
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*
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* @v app Stream application
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* @v len Length of acknowledged data
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*/
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void filter_acked ( struct stream_application *app, size_t len ) {
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struct filter_stream *filter =
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container_of ( app, struct filter_stream, downstream );
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stream_acked ( &filter->upstream, len );
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}
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/**
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* Receive new data
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*
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* @v app Stream application
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* @v data Data
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* @v len Length of data
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*/
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void filter_newdata ( struct stream_application *app,
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void *data, size_t len ) {
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struct filter_stream *filter =
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container_of ( app, struct filter_stream, downstream );
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stream_newdata ( &filter->upstream, data, len );
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}
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/**
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* Bind to local address
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*
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* @v conn Stream connection
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* @v local Local address
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* @ret rc Return status code
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*/
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int filter_bind ( struct stream_connection *conn, struct sockaddr *local ) {
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struct filter_stream *filter =
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container_of ( conn, struct filter_stream, upstream );
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return stream_bind ( &filter->downstream, local );
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}
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/**
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* Connect to remote address
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*
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* @v conn Stream connection
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* @v peer Remote address
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* @ret rc Return status code
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*/
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int filter_connect ( struct stream_connection *conn, struct sockaddr *peer ) {
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struct filter_stream *filter =
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container_of ( conn, struct filter_stream, upstream );
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return stream_connect ( &filter->downstream, peer );
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}
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/**
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* Close connection
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*
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* @v conn Stream connection
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*/
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void filter_close ( struct stream_connection *conn ) {
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struct filter_stream *filter =
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container_of ( conn, struct filter_stream, upstream );
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stream_close ( &filter->downstream );
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}
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/**
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* Send data via connection
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*
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* @v conn Stream connection
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* @v data Data to send
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* @v len Length of data
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* @ret rc Return status code
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*/
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int filter_send ( struct stream_connection *conn, void *data, size_t len ) {
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struct filter_stream *filter =
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container_of ( conn, struct filter_stream, upstream );
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return stream_send ( &filter->downstream, data, len );
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}
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/**
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* Notify connection that data is available to send
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*
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* @v conn Stream connection
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* @ret rc Return status code
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*/
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int filter_kick ( struct stream_connection *conn ) {
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struct filter_stream *filter =
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container_of ( conn, struct filter_stream, upstream );
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return stream_kick ( &filter->downstream );
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}
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2007-01-31 04:04:56 +01:00
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/**
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* Insert filter into stream
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*
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* @v app Stream application
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* @v filter Filter stream
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* @ret rc Return status code
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*/
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int insert_filter ( struct stream_application *app,
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struct filter_stream *filter ) {
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struct stream_connection *conn = app->conn;
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if ( ! app->conn ) {
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DBGC ( filter, "Filter %p cannot insert onto closed stream\n",
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filter );
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return -ENOTCONN;
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}
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app->conn = &filter->upstream;
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conn->app = &filter->downstream;
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return 0;
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}
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