119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
/*
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* packet-bctp.c
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* Q.1990 BICC bearer control tunnelling protocol
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*
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* (c) 2007, Luis E. Garcia Ontanon <luis@ontanon.org>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* Ref ITU-T Rec. Q.1990 (07/2001)
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*/
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#include "config.h"
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#include <epan/packet.h>
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#define PNAME "BCTP Q.1990"
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#define PSNAME "BCTP"
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#define PFNAME "bctp"
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void proto_register_bctp(void);
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void proto_reg_handoff_bctp(void);
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static int proto_bctp = -1;
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static int hf_bctp_bvei = -1;
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static int hf_bctp_bvi = -1;
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static int hf_bctp_tpei = -1;
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static int hf_bctp_tpi = -1;
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static gint ett_bctp = -1;
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static dissector_table_t bctp_dissector_table;
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static dissector_handle_t text_handle;
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/*
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static const range_string tpi_vals[] = {
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{0x00,0x17,"spare (binary encoded protocols)"},
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{0x18,0x1f,"reserved for national use (binary encoded protocols)"},
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{0x20,0x20,"IPBCP (text encoded)"},
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{0x21,0x21,"spare (text encoded protocol)"},
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{0x22,0x22,"not used"},
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{0x23,0x37,"spare (text encoded protocols)"},
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{0x38,0x3f,"reserved for national use (text encoded protocols)"},
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{0,0,NULL}
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};
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*/
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static const value_string bvei_vals[] = {
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{0,"No indication"},
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{1,"Version Error Indication, BCTP version not supported"},
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{0,NULL}
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};
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static int dissect_bctp(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data _U_) {
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proto_item* pi = proto_tree_add_item(tree, proto_bctp, tvb,0,2, ENC_NA);
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proto_tree* pt = proto_item_add_subtree(pi,ett_bctp);
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tvbuff_t* sub_tvb = tvb_new_subset_remaining(tvb, 2);
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guint8 tpi = tvb_get_guint8(tvb,1) & 0x3f;
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proto_tree_add_item(pt, hf_bctp_bvei, tvb,0,2, ENC_BIG_ENDIAN);
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proto_tree_add_item(pt, hf_bctp_bvi, tvb,0,2, ENC_BIG_ENDIAN);
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proto_tree_add_item(pt, hf_bctp_tpei, tvb,0,2, ENC_BIG_ENDIAN);
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proto_tree_add_item(pt, hf_bctp_tpi, tvb,0,2, ENC_BIG_ENDIAN);
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if (!dissector_try_uint(bctp_dissector_table, tpi, sub_tvb, pinfo, tree) ) {
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if (tpi <= 0x22) {
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call_data_dissector(sub_tvb, pinfo, tree);
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} else {
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/* tpi > 0x22 */
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call_dissector(text_handle,sub_tvb, pinfo, tree);
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}
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}
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return tvb_captured_length(tvb);
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}
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void
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proto_register_bctp (void)
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{
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static hf_register_info hf[] = {
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{&hf_bctp_bvei, {"BVEI", "bctp.bvei", FT_UINT16, BASE_HEX, VALS(bvei_vals), 0x4000, "BCTP Version Error Indicator", HFILL }},
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{&hf_bctp_bvi, {"BVI", "bctp.bvi", FT_UINT16, BASE_HEX, NULL, 0x1F00, "BCTP Version Indicator", HFILL }},
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{&hf_bctp_tpei, {"TPEI", "bctp.tpei", FT_UINT16, BASE_HEX, NULL, 0x0040, "Tunneled Protocol Error Indicator", HFILL }},
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{&hf_bctp_tpi, {"TPI", "bctp.tpi", FT_UINT16, BASE_HEX, NULL, 0x003F, "Tunneled Protocol Indicator", HFILL }},
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};
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static gint *ett[] = {
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&ett_bctp
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};
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proto_bctp = proto_register_protocol(PNAME, PSNAME, PFNAME);
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proto_register_field_array(proto_bctp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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register_dissector("bctp", dissect_bctp, proto_bctp);
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bctp_dissector_table = register_dissector_table("bctp.tpi", "BCTP Tunneled Protocol Indicator", proto_bctp, FT_UINT32, BASE_DEC);
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}
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void
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proto_reg_handoff_bctp(void)
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{
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text_handle = find_dissector_add_dependency("data-text-lines", proto_bctp);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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