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