![Michael Brown](/assets/img/avatar_default.png)
Allow the link layer to directly report whether or not a packet is multicast or broadcast at the time of calling pull(), rather than relying on heuristics to determine this at a later stage. Signed-off-by: Michael Brown <mcb30@ipxe.org>
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/*
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* Copyright (c) 2009 Joshua Oreman <oremanj@rwcr.net>.
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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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FILE_LICENCE ( GPL2_OR_LATER );
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/** @file
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*
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* 802.1X Extensible Authentication Protocol over LANs demultiplexer
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*
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*/
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#include <ipxe/netdevice.h>
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#include <ipxe/iobuf.h>
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#include <ipxe/if_ether.h>
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#include <ipxe/eapol.h>
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#include <errno.h>
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#include <byteswap.h>
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/**
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* Receive EAPOL network-layer packet
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*
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* @v iob I/O buffer
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* @v netdev Network device
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* @v ll_dest Link-layer destination address
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* @v ll_source Link-layer source address
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* @v flags Packet flags
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*
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* This function takes ownership of the I/O buffer passed to it.
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*/
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static int eapol_rx ( struct io_buffer *iob, struct net_device *netdev,
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const void *ll_dest, const void *ll_source,
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unsigned int flags __unused ) {
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struct eapol_frame *eapol = iob->data;
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struct eapol_handler *handler;
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if ( iob_len ( iob ) < EAPOL_HDR_LEN ) {
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free_iob ( iob );
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return -EINVAL;
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}
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for_each_table_entry ( handler, EAPOL_HANDLERS ) {
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if ( handler->type == eapol->type ) {
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iob_pull ( iob, EAPOL_HDR_LEN );
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return handler->rx ( iob, netdev, ll_dest, ll_source );
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}
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}
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free_iob ( iob );
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return -( ENOTSUP | ( ( eapol->type & 0x1f ) << 8 ) );
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}
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/**
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* Transcribe EAPOL network-layer address
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*
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* @v net_addr Network-layer address
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* @ret str String representation of network-layer address
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*
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* EAPOL doesn't have network-layer addresses, so we just return the
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* string @c "<EAPOL>".
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*/
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static const char * eapol_ntoa ( const void *net_addr __unused )
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{
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return "<EAPOL>";
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}
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/** EAPOL network protocol */
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struct net_protocol eapol_protocol __net_protocol = {
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.name = "EAPOL",
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.rx = eapol_rx,
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.ntoa = eapol_ntoa,
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.net_proto = htons ( ETH_P_EAPOL ),
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};
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