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/* packet-retix-bpdu.c
* Routines for BPDU (Retix Spanning Tree Protocol) disassembly
*
* Copyright 2005 Giles Scott (gscott <AT> arubanetworks dot com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#if 0
#endif
#include <epan/packet.h>
#if 0
#include <epan/llcsaps.h>
#include <epan/ppptypes.h>
#include <epan/chdlctypes.h>
#endif
#include <epan/addr_resolv.h>
void proto_register_retix_bpdu(void);
static gint ett_retix_bpdu = -1;
static int proto_retix_bpdu = -1;
static int hf_retix_bpdu_root_mac = -1;
static int hf_retix_bpdu_bridge_mac = -1;
static int hf_retix_bpdu_max_age = -1;
static int hf_retix_bpdu_hello_time = -1;
static int hf_retix_bpdu_forward_delay = -1;
/* I don't have the spec's for this protcol so it's been reverse engineered
* It seems quite like 802.1D
* It looks like the protocol version is specified in the ethernet trailer
* In the single packet I have the trailer is
* "RevC CBPDU"
* There are several fields I've not dissected as I'm not exactly sure what they are
* What ever happened to Retix anyway?
*/
static int
dissect_retix_bpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *retix_bpdu_tree;
proto_tree *ti;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "R-STP");
ti = proto_tree_add_item(tree, proto_retix_bpdu, tvb, 0, -1, ENC_NA);
retix_bpdu_tree = proto_item_add_subtree(ti, ett_retix_bpdu);
proto_tree_add_item(retix_bpdu_tree, hf_retix_bpdu_root_mac, tvb, 0, 6, ENC_NA);
proto_tree_add_item(retix_bpdu_tree, hf_retix_bpdu_bridge_mac, tvb, 10, 6, ENC_NA);
col_add_fstr(pinfo->cinfo, COL_INFO, "Bridge MAC %s", tvb_ether_to_str(pinfo->pool, tvb, 10));
proto_tree_add_item(retix_bpdu_tree, hf_retix_bpdu_max_age, tvb, 20, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(retix_bpdu_tree, hf_retix_bpdu_hello_time, tvb, 22, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(retix_bpdu_tree, hf_retix_bpdu_forward_delay, tvb, 24, 2, ENC_BIG_ENDIAN);
return tvb_captured_length(tvb);
}
void
proto_register_retix_bpdu(void)
{
static hf_register_info hf[] = {
{ &hf_retix_bpdu_root_mac,
{ "Root MAC", "r-stp.root.hw", FT_ETHER, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_retix_bpdu_bridge_mac,
{ "Bridge MAC", "r-stp.bridge.hw", FT_ETHER, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_retix_bpdu_max_age,
{ "Max Age", "r-stp.maxage", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_retix_bpdu_hello_time,
{ "Hello Time", "r-stp.hello", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_retix_bpdu_forward_delay,
{ "Forward Delay", "r-stp.forward", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
};
static gint *ett[] ={
&ett_retix_bpdu,
};
proto_retix_bpdu = proto_register_protocol("Retix Spanning Tree Protocol", "R-STP", "r-stp");
proto_register_field_array(proto_retix_bpdu, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("rbpdu", dissect_retix_bpdu, proto_retix_bpdu);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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