/* $Id: linuxsll.h 1963 2008-01-23 18:21:40Z aturner $ */

/*
 * Copyright (c) 2006-2007 Aaron Turner.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright owners nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


#include "dlt_plugins-int.h"

#ifndef _DLT_linuxsll_H_
#define _DLT_linuxsll_H_

int dlt_linuxsll_register(tcpeditdlt_t *ctx);
int dlt_linuxsll_init(tcpeditdlt_t *ctx);
int dlt_linuxsll_cleanup(tcpeditdlt_t *ctx);
int dlt_linuxsll_parse_opts(tcpeditdlt_t *ctx);
int dlt_linuxsll_decode(tcpeditdlt_t *ctx, const u_char *packet, const int pktlen);
int dlt_linuxsll_encode(tcpeditdlt_t *ctx, u_char **packet, int pktlen, tcpr_dir_t dir);
int dlt_linuxsll_proto(tcpeditdlt_t *ctx, const u_char *packet, const int pktlen);
u_char *dlt_linuxsll_get_layer3(tcpeditdlt_t *ctx, u_char *packet, const int pktlen);
u_char *dlt_linuxsll_merge_layer3(tcpeditdlt_t *ctx, u_char *packet, const int pktlen, u_char *l3data);
tcpeditdlt_l2addr_type_t dlt_linuxsll_l2addr_type(void);
int dlt_linuxsll_l2len(tcpeditdlt_t *ctx, const u_char *packet, const int pktlen);
u_char *dlt_linuxsll_get_mac(tcpeditdlt_t *ctx, tcpeditdlt_mac_type_t mac, const u_char *packet, const int pktlen);

/*
 * structure to hold any data parsed from the packet by the decoder.
 * Example: Ethernet VLAN tag info
 */
struct linuxsll_extra_s {
    int dummy;
};
typedef struct linuxsll_extra_s linuxsll_extra_t;


/* 
 * FIXME: structure to hold any data in the tcpeditdlt_plugin_t->config 
 * Things like: 
 * - Parsed user options
 * - State between packets
 * - Note, you should only use this for the encoder function, decoder functions should place
 *   "extra" data parsed from the packet in the tcpeditdlt_t->decoded_extra buffer since that 
 *   is available to any encoder plugin.
 */
struct linuxsll_config_s {    
    /* dummy entry for SunPro compiler which doesn't like empty structs */
    int dummy;
};
typedef struct linuxsll_config_s linuxsll_config_t;

struct linux_sll_header_s {
    u_int16_t source;       /* values 0-4 determine where the packet came and where it's going */
    u_int16_t type;         /* linux ARPHRD_* values for link-layer device type.  See:
                             * http://www.gelato.unsw.edu.au/lxr/source/include/linux/if_arp.h
                             */
#define ARPHRD_ETHER    1   /* ethernet */
    u_int16_t length;       /* source address length */
    u_char address[8];      /* first 8 bytes of source address (may be truncated) */
    u_int16_t proto;        /* Ethernet protocol type */
};
typedef struct linux_sll_header_s linux_sll_header_t;

#endif