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- /* $Id: hdlc.h 1841 2007-04-26 03:43:14Z 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_hdlc_H_
- #define _DLT_hdlc_H_
- int dlt_hdlc_register(tcpeditdlt_t *ctx);
- int dlt_hdlc_init(tcpeditdlt_t *ctx);
- int dlt_hdlc_cleanup(tcpeditdlt_t *ctx);
- int dlt_hdlc_parse_opts(tcpeditdlt_t *ctx);
- int dlt_hdlc_decode(tcpeditdlt_t *ctx, const u_char *packet, const int pktlen);
- int dlt_hdlc_encode(tcpeditdlt_t *ctx, u_char **packet, int pktlen, tcpr_dir_t dir);
- int dlt_hdlc_proto(tcpeditdlt_t *ctx, const u_char *packet, const int pktlen);
- u_char *dlt_hdlc_get_layer3(tcpeditdlt_t *ctx, u_char *packet, const int pktlen);
- u_char *dlt_hdlc_merge_layer3(tcpeditdlt_t *ctx, u_char *packet, const int pktlen, u_char *l3data);
- tcpeditdlt_l2addr_type_t dlt_hdlc_l2addr_type(void);
- int dlt_hdlc_l2len(tcpeditdlt_t *ctx, const u_char *packet, const int pktlen);
- u_char *dlt_hdlc_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 hdlc_extra_s {
- int hdlc; /* set to 1 if values below are filled out */
- u_int8_t address;
- u_int8_t control;
- };
- typedef struct hdlc_extra_s hdlc_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 hdlc_config_s {
- /* user defined values. 65535 == unset */
- u_int16_t address;
- u_int16_t control;
- };
- typedef struct hdlc_config_s hdlc_config_t;
- /* Cisco HDLC has a simple 32 bit header */
- #define CISCO_HDLC_LEN 4
- struct cisco_hdlc_s {
- u_int8_t address;
- #define CISCO_HDLC_ADDR_UNICAST 0x0F
- #define CISCO_HDLC_ADDR_BROADCAST 0x8F
- u_int8_t control; // always zero
- u_int16_t protocol;
- };
- typedef struct cisco_hdlc_s cisco_hdlc_t;
- #endif
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