diff options
author | Joshua Oreman | 2009-08-08 07:31:25 +0200 |
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committer | Marty Connor | 2010-01-05 15:18:12 +0100 |
commit | 432cc6d1d8d7c8e8b8fd690c9720a26f09c3f26c (patch) | |
tree | 848a5231369098dacf63b196071044584ad07c7e /src/net/eapol.c | |
parent | [802.11] Add support for WEP-protected networks (diff) | |
download | ipxe-432cc6d1d8d7c8e8b8fd690c9720a26f09c3f26c.tar.gz ipxe-432cc6d1d8d7c8e8b8fd690c9720a26f09c3f26c.tar.xz ipxe-432cc6d1d8d7c8e8b8fd690c9720a26f09c3f26c.zip |
[eapol] Add basic support for 802.1X EAP over LANs
EAPOL is a container protocol that can wrap either EAP packets or
802.11 EAPOL-Key frames. For cleanliness' sake, add a stub that strips
the framing and sends packets off to the appropriate handler if it
is compiled in.
Signed-off-by: Marty Connor <mdc@etherboot.org>
Diffstat (limited to 'src/net/eapol.c')
-rw-r--r-- | src/net/eapol.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/net/eapol.c b/src/net/eapol.c new file mode 100644 index 00000000..507c8ce2 --- /dev/null +++ b/src/net/eapol.c @@ -0,0 +1,85 @@ +/* + * 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 <gpxe/netdevice.h> +#include <gpxe/iobuf.h> +#include <gpxe/if_ether.h> +#include <gpxe/eapol.h> +#include <errno.h> +#include <byteswap.h> + +/** + * Receive EAPOL network-layer packet + * + * @v iob I/O buffer + * @v netdev Network device + * @v ll_source Link-layer source address + * + * 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_source ) +{ + 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_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 ), +}; |