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/* packet-hpext.c
* Routines for HP extended IEEE 802.2 LLC layer
* Jochen Friedrich <jochen@scram.de>
*
* 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"
#include <epan/packet.h>
#include <epan/llcsaps.h>
#include "packet-hpext.h"
void proto_register_hpext(void);
void proto_reg_handoff_hpext(void);
static dissector_handle_t hpext_handle;
static dissector_table_t subdissector_table;
static const value_string xsap_vals[] = {
{ HPEXT_DXSAP, "RBOOT Destination Service Access Point" },
{ HPEXT_SXSAP, "RBOOT Source Service Access Point" },
{ HPEXT_HPSW, "HP Switch Protocol" },
{ HPEXT_SNMP, "SNMP" },
{ 0x00, NULL }
};
static int proto_hpext = -1;
static int hf_hpext_dxsap = -1;
static int hf_hpext_reserved = -1;
static int hf_hpext_sxsap = -1;
static gint ett_hpext = -1;
static int
dissect_hpext(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *hpext_tree = NULL;
proto_item *ti = NULL;
guint16 dxsap, sxsap;
tvbuff_t *next_tvb;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "HPEXT");
dxsap = tvb_get_ntohs(tvb, 3);
sxsap = tvb_get_ntohs(tvb, 5);
if (tree) {
ti = proto_tree_add_item(tree, proto_hpext, tvb, 0, 7, ENC_NA);
hpext_tree = proto_item_add_subtree(ti, ett_hpext);
proto_tree_add_item(hpext_tree, hf_hpext_reserved, tvb, 0, 3, ENC_NA);
proto_tree_add_uint(hpext_tree, hf_hpext_dxsap, tvb, 3,
2, dxsap);
proto_tree_add_uint(hpext_tree, hf_hpext_sxsap, tvb, 5,
2, sxsap);
}
col_append_fstr(pinfo->cinfo, COL_INFO,
"; HPEXT; DXSAP %s, SXSAP %s",
val_to_str(dxsap, xsap_vals, "%04x"),
val_to_str(sxsap, xsap_vals, "%04x"));
if (tvb_reported_length_remaining(tvb, 7) > 0) {
next_tvb = tvb_new_subset_remaining(tvb, 7);
if (!dissector_try_uint(subdissector_table,
dxsap, next_tvb, pinfo, tree)) {
call_data_dissector(next_tvb, pinfo, tree);
}
}
return tvb_captured_length(tvb);
}
void
proto_register_hpext(void)
{
static hf_register_info hf[] = {
{ &hf_hpext_dxsap,
{ "DXSAP", "hpext.dxsap",
FT_UINT16, BASE_HEX, VALS(xsap_vals), 0x0,
NULL, HFILL }
},
{ &hf_hpext_sxsap,
{ "SXSAP", "hpext.sxsap",
FT_UINT16, BASE_HEX, VALS(xsap_vals), 0x0,
NULL, HFILL }
},
{ &hf_hpext_reserved,
{ "Reserved", "hpext.reserved",
FT_UINT24, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
};
static gint *ett[] = {
&ett_hpext
};
proto_hpext = proto_register_protocol("HP Extended Local-Link Control", "HPEXT", "hpext");
proto_register_field_array(proto_hpext, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* subdissector code */
subdissector_table = register_dissector_table("hpext.dxsap",
"HPEXT XSAP", proto_hpext, FT_UINT16, BASE_HEX);
hpext_handle = register_dissector("hpext", dissect_hpext, proto_hpext);
}
void
proto_reg_handoff_hpext(void)
{
dissector_add_uint("llc.dsap", SAP_HPEXT, hpext_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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