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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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