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/*
* packet-bctp.c
* Q.1990 BICC bearer control tunnelling protocol
*
* (c) 2007, Luis E. Garcia Ontanon <luis@ontanon.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Ref ITU-T Rec. Q.1990 (07/2001)
*/
#include "config.h"
#include <epan/packet.h>
#define PNAME "BCTP Q.1990"
#define PSNAME "BCTP"
#define PFNAME "bctp"
void proto_register_bctp(void);
void proto_reg_handoff_bctp(void);
static int proto_bctp = -1;
static int hf_bctp_bvei = -1;
static int hf_bctp_bvi = -1;
static int hf_bctp_tpei = -1;
static int hf_bctp_tpi = -1;
static gint ett_bctp = -1;
static dissector_table_t bctp_dissector_table;
static dissector_handle_t text_handle;
/*
static const range_string tpi_vals[] = {
{0x00,0x17,"spare (binary encoded protocols)"},
{0x18,0x1f,"reserved for national use (binary encoded protocols)"},
{0x20,0x20,"IPBCP (text encoded)"},
{0x21,0x21,"spare (text encoded protocol)"},
{0x22,0x22,"not used"},
{0x23,0x37,"spare (text encoded protocols)"},
{0x38,0x3f,"reserved for national use (text encoded protocols)"},
{0,0,NULL}
};
*/
static const value_string bvei_vals[] = {
{0,"No indication"},
{1,"Version Error Indication, BCTP version not supported"},
{0,NULL}
};
static int dissect_bctp(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data _U_) {
proto_item* pi = proto_tree_add_item(tree, proto_bctp, tvb,0,2, ENC_NA);
proto_tree* pt = proto_item_add_subtree(pi,ett_bctp);
tvbuff_t* sub_tvb = tvb_new_subset_remaining(tvb, 2);
guint8 tpi = tvb_get_guint8(tvb,1) & 0x3f;
proto_tree_add_item(pt, hf_bctp_bvei, tvb,0,2, ENC_BIG_ENDIAN);
proto_tree_add_item(pt, hf_bctp_bvi, tvb,0,2, ENC_BIG_ENDIAN);
proto_tree_add_item(pt, hf_bctp_tpei, tvb,0,2, ENC_BIG_ENDIAN);
proto_tree_add_item(pt, hf_bctp_tpi, tvb,0,2, ENC_BIG_ENDIAN);
if (!dissector_try_uint(bctp_dissector_table, tpi, sub_tvb, pinfo, tree) ) {
if (tpi <= 0x22) {
call_data_dissector(sub_tvb, pinfo, tree);
} else {
/* tpi > 0x22 */
call_dissector(text_handle,sub_tvb, pinfo, tree);
}
}
return tvb_captured_length(tvb);
}
void
proto_register_bctp (void)
{
static hf_register_info hf[] = {
{&hf_bctp_bvei, {"BVEI", "bctp.bvei", FT_UINT16, BASE_HEX, VALS(bvei_vals), 0x4000, "BCTP Version Error Indicator", HFILL }},
{&hf_bctp_bvi, {"BVI", "bctp.bvi", FT_UINT16, BASE_HEX, NULL, 0x1F00, "BCTP Version Indicator", HFILL }},
{&hf_bctp_tpei, {"TPEI", "bctp.tpei", FT_UINT16, BASE_HEX, NULL, 0x0040, "Tunneled Protocol Error Indicator", HFILL }},
{&hf_bctp_tpi, {"TPI", "bctp.tpi", FT_UINT16, BASE_HEX, NULL, 0x003F, "Tunneled Protocol Indicator", HFILL }},
};
static gint *ett[] = {
&ett_bctp
};
proto_bctp = proto_register_protocol(PNAME, PSNAME, PFNAME);
proto_register_field_array(proto_bctp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("bctp", dissect_bctp, proto_bctp);
bctp_dissector_table = register_dissector_table("bctp.tpi", "BCTP Tunneled Protocol Indicator", proto_bctp, FT_UINT32, BASE_DEC);
}
void
proto_reg_handoff_bctp(void)
{
text_handle = find_dissector_add_dependency("data-text-lines", proto_bctp);
}
/*
* 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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