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/*
* Copyright (c) 2009 Joshua Oreman <oremanj@rwcr.net>.
*
* 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_LICENCE ( GPL2_OR_LATER );
/** @file
*
* 802.1X Extensible Authentication Protocol over LANs demultiplexer
*
*/
#include <ipxe/netdevice.h>
#include <ipxe/iobuf.h>
#include <ipxe/if_ether.h>
#include <ipxe/eapol.h>
#include <errno.h>
#include <byteswap.h>
/**
* Receive EAPOL network-layer packet
*
* @v iob I/O buffer
* @v netdev Network device
* @v ll_dest Link-layer destination address
* @v ll_source Link-layer source address
* @v flags Packet flags
*
* This function takes ownership of the I/O buffer passed to it.
*/
static int eapol_rx ( struct io_buffer *iob, struct net_device *netdev,
const void *ll_dest, const void *ll_source,
unsigned int flags __unused ) {
struct eapol_frame *eapol = iob->data;
struct eapol_handler *handler;
if ( iob_len ( iob ) < EAPOL_HDR_LEN ) {
free_iob ( iob );
return -EINVAL;
}
for_each_table_entry ( handler, EAPOL_HANDLERS ) {
if ( handler->type == eapol->type ) {
iob_pull ( iob, EAPOL_HDR_LEN );
return handler->rx ( iob, netdev, ll_dest, ll_source );
}
}
free_iob ( iob );
return -( ENOTSUP | ( ( eapol->type & 0x1f ) << 8 ) );
}
/**
* Transcribe EAPOL network-layer address
*
* @v net_addr Network-layer address
* @ret str String representation of network-layer address
*
* EAPOL doesn't have network-layer addresses, so we just return the
* string @c "<EAPOL>".
*/
static const char * eapol_ntoa ( const void *net_addr __unused )
{
return "<EAPOL>";
}
/** EAPOL network protocol */
struct net_protocol eapol_protocol __net_protocol = {
.name = "EAPOL",
.rx = eapol_rx,
.ntoa = eapol_ntoa,
.net_proto = htons ( ETH_P_EAPOL ),
};
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