118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/* packet-chdlc.c
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* Routines for Wellfleet HDLC packet disassembly
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* Copied from the Cisco HDLC packet disassembly routines
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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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#include "config.h"
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#include <epan/packet.h>
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#include <epan/addr_resolv.h>
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void proto_register_wfleet_hdlc(void);
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void proto_reg_handoff_wfleet_hdlc(void);
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static int proto_wfleet_hdlc = -1;
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static int hf_wfleet_hdlc_addr = -1;
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static int hf_wfleet_hdlc_cmd = -1;
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static gint ett_wfleet_hdlc = -1;
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static dissector_handle_t eth_withoutfcs_handle;
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static dissector_handle_t wfleet_hdlc_handle;
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static const value_string wfleet_hdlc_cmd_vals[] = {
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{ 0x03, "Un-numbered I frame"},
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{ 0, NULL}
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};
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static int
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dissect_wfleet_hdlc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_item *ti;
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proto_tree *fh_tree = NULL;
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tvbuff_t *next_tvb;
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guint8 addr;
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guint8 cmd;
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col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "N/A");
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col_set_str(pinfo->cinfo, COL_RES_DL_DST, "N/A");
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "WHDLC");
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col_clear(pinfo->cinfo, COL_INFO);
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addr = tvb_get_guint8(tvb, 0);
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cmd = tvb_get_guint8(tvb, 1);
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if (tree) {
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ti = proto_tree_add_item(tree, proto_wfleet_hdlc, tvb, 0, 2, ENC_NA);
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fh_tree = proto_item_add_subtree(ti, ett_wfleet_hdlc);
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proto_tree_add_uint(fh_tree, hf_wfleet_hdlc_addr, tvb, 0, 1, addr);
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proto_tree_add_uint(fh_tree, hf_wfleet_hdlc_cmd, tvb, 1, 1, cmd);
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}
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/*
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* Build a tvb of the piece past the first two bytes and call the
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* ethernet dissector
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*/
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next_tvb = tvb_new_subset_remaining(tvb, 2);
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call_dissector(eth_withoutfcs_handle, next_tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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void
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proto_register_wfleet_hdlc(void)
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{
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static hf_register_info hf[] = {
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{ &hf_wfleet_hdlc_addr,
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{ "Address", "wfleet_hdlc.address", FT_UINT8, BASE_HEX,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_wfleet_hdlc_cmd,
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{ "Command", "wfleet_hdlc.command", FT_UINT8, BASE_HEX,
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VALS(wfleet_hdlc_cmd_vals), 0x0, NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_wfleet_hdlc,
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};
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proto_wfleet_hdlc = proto_register_protocol("Wellfleet HDLC", "WHDLC", "whdlc");
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proto_register_field_array(proto_wfleet_hdlc, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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wfleet_hdlc_handle = register_dissector("wfleet_hdlc", dissect_wfleet_hdlc, proto_wfleet_hdlc);
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}
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void
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proto_reg_handoff_wfleet_hdlc(void)
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{
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dissector_add_uint("wtap_encap", WTAP_ENCAP_WFLEET_HDLC, wfleet_hdlc_handle);
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/*
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* Find the eth dissector and save a ref to it
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*/
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eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_wfleet_hdlc);
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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: 2
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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