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/* packet-hbbak.c
* Routines for ethertype 0x8988 Paloalto heartbeat backup traffic via mgmt
*
* Copyright 2020 Joerg Mayer (see AUTHORS file)
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/* 2do:
* - Find out the meaning of the 6 bytes header: timestamp?
* - Handle trailer bytes correctly
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/etypes.h>
void proto_reg_handoff_hbbak(void);
void proto_register_hbbak(void);
#define PROTO_SHORT_NAME "PA-HB-Bak"
#define PROTO_LONG_NAME "Paloalto Heartbeat Backup"
#define HBBAK_SIZE 8
static int proto_hbbak = -1;
static int hf_hbbak_unknown1 = -1;
static int hf_hbbak_etype_outer = -1;
static int hf_hbbak_trailer = -1;
static gint ett_hbbak = -1;
static dissector_handle_t ethertype_handle;
static int
dissect_hbbak(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *ti, *hbbak_tree;
int offset = 0;
guint16 eth_type_outer;
ethertype_data_t ethertype_data;
col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
col_clear(pinfo->cinfo, COL_INFO);
col_add_fstr(pinfo->cinfo, COL_INFO, PROTO_LONG_NAME);
hbbak_tree = NULL;
ti = proto_tree_add_item(tree, proto_hbbak, tvb, offset, HBBAK_SIZE, ENC_NA);
hbbak_tree = proto_item_add_subtree(ti, ett_hbbak);
proto_tree_add_item(hbbak_tree, hf_hbbak_unknown1, tvb, offset, 6, ENC_NA);
offset += 6;
eth_type_outer = tvb_get_ntohs(tvb, offset);
proto_tree_add_uint(hbbak_tree, hf_hbbak_etype_outer, tvb,
offset, 2, eth_type_outer);
ethertype_data.etype = eth_type_outer;
ethertype_data.payload_offset = HBBAK_SIZE;
ethertype_data.fh_tree = hbbak_tree;
ethertype_data.trailer_id = hf_hbbak_trailer;
ethertype_data.fcs_len = 0;
call_dissector_with_data(ethertype_handle, tvb, pinfo, tree, ðertype_data);
return tvb_captured_length(tvb);
}
void
proto_register_hbbak(void)
{
static hf_register_info hf[] = {
{ &hf_hbbak_unknown1,
{ "Unknown1", "hbbak.unknown1", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_hbbak_etype_outer,
{ "Type", "hbbak.etype", FT_UINT16, BASE_HEX, VALS(etype_vals),
0x0, NULL, HFILL }},
{ &hf_hbbak_trailer,
{ "Trailer", "hbbak.trailer", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_hbbak,
};
proto_hbbak = proto_register_protocol(PROTO_LONG_NAME, PROTO_LONG_NAME, "hbbak");
proto_register_field_array(proto_hbbak, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_hbbak(void)
{
dissector_handle_t hbbak_handle;
ethertype_handle = find_dissector_add_dependency("ethertype", proto_hbbak);
hbbak_handle = create_dissector_handle(dissect_hbbak, proto_hbbak);
dissector_add_uint("ethertype", ETHERTYPE_PA_HBBACKUP, hbbak_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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