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-rw-r--r--gpxe/src/net/eapol.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/gpxe/src/net/eapol.c b/gpxe/src/net/eapol.c
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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 <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 ),
+};