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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
*
* Stream API
*/
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <gpxe/stream.h>
/**
* Connection established
*
* @v conn Stream connection
*/
void stream_connected ( struct stream_connection *conn ) {
struct stream_application *app = conn->app;
DBGC ( app, "Stream %p connected\n", app );
/* Check connection actually exists */
if ( ! app ) {
DBGC ( conn, "Stream connection %p has no application\n",
conn );
return;
}
/* Hand off to application */
app->op->connected ( app );
}
/**
* Connection closed
*
* @v conn Stream connection
* @v rc Error code, if any
*/
void stream_closed ( struct stream_connection *conn, int rc ) {
struct stream_application *app = conn->app;
DBGC ( app, "Stream %p closed (%s)\n", app, strerror ( rc ) );
/* Check connection actually exists */
if ( ! app ) {
DBGC ( conn, "Stream connection %p has no application\n",
conn );
return;
}
/* Hand off to application */
app->op->closed ( app, rc );
}
/**
* Transmit data
*
* @v conn Stream connection
* @v data Temporary data buffer
* @v len Length of temporary data buffer
*/
void stream_senddata ( struct stream_connection *conn,
void *data, size_t len ) {
struct stream_application *app = conn->app;
DBGC2 ( app, "Stream %p sending data\n", app );
/* Check connection actually exists */
if ( ! app ) {
DBGC ( conn, "Stream connection %p has no application\n",
conn );
return;
}
/* Hand off to application */
app->op->senddata ( app, data, len );
}
/**
* Transmitted data acknowledged
*
* @v conn Stream connection
* @v len Length of acknowledged data
*
* @c len must not exceed the outstanding amount of unacknowledged
* data.
*/
void stream_acked ( struct stream_connection *conn, size_t len ) {
struct stream_application *app = conn->app;
DBGC2 ( app, "Stream %p had %zd bytes acknowledged\n", app, len );
/* Check connection actually exists */
if ( ! app ) {
DBGC ( conn, "Stream connection %p has no application\n",
conn );
return;
}
/* Hand off to application */
app->op->acked ( app, len );
}
/**
* Receive new data
*
* @v conn Stream connection
* @v data Data
* @v len Length of data
*/
void stream_newdata ( struct stream_connection *conn,
void *data, size_t len ) {
struct stream_application *app = conn->app;
DBGC2 ( app, "Stream %p received %zd bytes\n", app, len );
/* Check connection actually exists */
if ( ! app ) {
DBGC ( conn, "Stream connection %p has no application\n",
conn );
return;
}
/* Hand off to application */
app->op->newdata ( app, data, len );
}
/**
* Bind to local address
*
* @v app Stream application
* @v local Local address
* @ret rc Return status code
*/
int stream_bind ( struct stream_application *app, struct sockaddr *local ) {
struct stream_connection *conn = app->conn;
int rc;
DBGC2 ( app, "Stream %p binding\n", app );
/* Check connection actually exists */
if ( ! conn ) {
DBGC ( app, "Stream %p has no connection\n", app );
return -ENOTCONN;
}
/* Hand off to connection */
if ( ( rc = conn->op->bind ( conn, local ) ) != 0 ) {
DBGC ( app, "Stream %p failed to bind: %s\n",
app, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Connect to remote address
*
* @v app Stream application
* @v peer Remote address
* @ret rc Return status code
*/
int stream_connect ( struct stream_application *app, struct sockaddr *peer ) {
struct stream_connection *conn = app->conn;
int rc;
DBGC2 ( app, "Stream %p connecting\n", app );
/* Check connection actually exists */
if ( ! conn ) {
DBGC ( app, "Stream %p has no connection\n", app );
return -ENOTCONN;
}
/* Hand off to connection */
if ( ( rc = conn->op->connect ( conn, peer ) ) != 0 ) {
DBGC ( app, "Stream %p failed to connect: %s\n",
app, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Close connection
*
* @v app Stream application
*/
void stream_close ( struct stream_application *app ) {
struct stream_connection *conn = app->conn;
DBGC2 ( app, "Stream %p closing\n", app );
/* Check connection actually exists */
if ( ! conn ) {
DBGC ( app, "Stream %p has no connection\n", app );
return;
}
/* Hand off to connection */
conn->op->close ( conn );
}
/**
* Send data via connection
*
* @v app Stream application
* @v data Data to send
* @v len Length of data
* @ret rc Return status code
*
* This method should be called only in the context of an
* application's senddata() method.
*/
int stream_send ( struct stream_application *app, void *data, size_t len ) {
struct stream_connection *conn = app->conn;
int rc;
DBGC2 ( app, "Stream %p sending %zd bytes\n", app, len );
/* Check connection actually exists */
if ( ! conn ) {
DBGC ( app, "Stream %p has no connection\n", app );
return -ENOTCONN;
}
/* Hand off to connection */
if ( ( rc = conn->op->send ( conn, data, len ) ) != 0 ) {
DBGC ( app, "Stream %p failed to send %zd bytes: %s\n",
app, len, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Notify connection that data is available to send
*
* @v app Stream application
* @ret rc Return status code
*/
int stream_kick ( struct stream_application *app ) {
struct stream_connection *conn = app->conn;
int rc;
DBGC2 ( app, "Stream %p kicking connection\n", app );
/* Check connection actually exists */
if ( ! conn ) {
DBGC ( app, "Stream %p has no connection\n", app );
return -ENOTCONN;
}
/* Hand off to connection */
if ( ( rc = conn->op->kick ( conn ) ) != 0 ) {
DBGC ( app, "Stream %p failed to kick connection: %s\n",
app, strerror ( rc ) );
return rc;
}
return 0;
}
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