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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., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
-
- #ifndef _IPXE_EAPOL_H
- #define _IPXE_EAPOL_H
-
- /** @file
- *
- * Definitions for EAPOL (Extensible Authentication Protocol over
- * LANs) frames. Definitions for the packets usually encapsulated in
- * them are elsewhere.
- */
-
- #include <ipxe/tables.h>
- #include <stdint.h>
-
- FILE_LICENCE ( GPL2_OR_LATER );
-
-
- /**
- * @defgroup eapol_type EAPOL archetype identifiers
- * @{
- */
- #define EAPOL_TYPE_EAP 0 /**< EAP authentication handshake packet */
- #define EAPOL_TYPE_START 1 /**< Request by Peer to begin (no data) */
- #define EAPOL_TYPE_LOGOFF 2 /**< Request by Peer to terminate (no data) */
- #define EAPOL_TYPE_KEY 3 /**< EAPOL-Key packet */
- /** @} */
-
- /** Expected EAPOL version field value
- *
- * Version 2 is often seen and has no format differences from version 1;
- * however, many older APs will completely drop version-2 packets, so
- * we advertise ourselves as version 1.
- */
- #define EAPOL_THIS_VERSION 1
-
- /** Length of an EAPOL frame header */
- #define EAPOL_HDR_LEN 4
-
- /** An EAPOL frame
- *
- * This may encapsulate an eap_pkt, an eapol_key_pkt, or a Start or
- * Logoff request with no data attached. It is transmitted directly in
- * an Ethernet frame, with no IP packet header.
- */
- struct eapol_frame
- {
- /** EAPOL version identifier, always 1 */
- u8 version;
-
- /** EAPOL archetype identifier indicating format of payload */
- u8 type;
-
- /** Length of payload, in network byte order */
- u16 length;
-
- /** Payload, if @a type is EAP or EAPOL-Key */
- u8 data[0];
- } __attribute__ (( packed ));
-
-
- /** An EAPOL frame type handler
- *
- * Normally there will be at most two of these, one for EAP and one
- * for EAPOL-Key frames. The EAPOL interface code handles Start and
- * Logoff directly.
- */
- struct eapol_handler
- {
- /** EAPOL archetype identifier for payload this handler will handle */
- u8 type;
-
- /** Receive EAPOL-encapsulated packet of specified type
- *
- * @v iob I/O buffer containing packet payload
- * @v netdev Network device from which packet was received
- * @V ll_dest Destination link-layer address
- * @v ll_source Source link-layer address
- * @ret rc Return status code
- *
- * The I/O buffer will have the EAPOL header pulled off it, so
- * @c iob->data points to the first byte of the payload.
- *
- * This function takes ownership of the I/O buffer passed to it.
- */
- int ( * rx ) ( struct io_buffer *iob, struct net_device *netdev,
- const void *ll_dest, const void *ll_source );
- };
-
- #define EAPOL_HANDLERS __table ( struct eapol_handler, "eapol_handlers" )
- #define __eapol_handler __table_entry ( EAPOL_HANDLERS, 01 )
-
-
- extern struct net_protocol eapol_protocol __net_protocol;
-
-
- #endif /* _IPXE_EAPOL_H */
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