214 lines
6.2 KiB
C
214 lines
6.2 KiB
C
/* packet-cisco-marker.c
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* Routines for CISCO's ERSPAN3 Marker Packet
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* See: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-series-switches/white-paper-c11-733921.html#_Toc413144488
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* Copyright 2015, Peter Membrey
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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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* Copied from packet-time.c
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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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void proto_register_erspan_marker(void);
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void proto_reg_handoff_erspan_marker(void);
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static dissector_handle_t marker_handle;
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static header_field_info *hfi_marker = NULL;
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#define CISCO_ERSPAN_MARKER_HFI_INIT HFI_INIT(proto_marker)
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static header_field_info cisco_erspan_prop_header CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "Proprietary CISCO Header", "cisco_erspan_marker.prop_header",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL };
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static header_field_info cisco_erspan_info CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "Header", "cisco_erspan_marker.header",
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FT_BOOLEAN, 8, NULL, 0x0,
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NULL, HFILL };
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static header_field_info cisco_erspan_version CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "Version", "cisco_erspan_marker.version",
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FT_UINT16, BASE_DEC, NULL, 0x0f00,
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NULL, HFILL };
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static header_field_info cisco_erspan_type CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "Type", "cisco_erspan_marker.type",
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FT_UINT16, BASE_DEC, NULL, 0xf000,
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NULL, HFILL };
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static header_field_info cisco_erspan_ssid CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "SSID", "cisco_erspan_marker.ssid",
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FT_UINT16, BASE_DEC, NULL, 0x00ff,
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NULL, HFILL };
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static header_field_info cisco_erspan_granularity CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "Granularity", "cisco_erspan_marker.granularity",
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FT_UINT16, BASE_DEC, NULL, 0xff00,
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NULL, HFILL };
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static header_field_info cisco_erspan_utcoffset CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "UTC Offset", "cisco_erspan_marker.utc_offset",
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FT_UINT16, BASE_DEC, NULL, 0x00ff,
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NULL, HFILL };
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static header_field_info cisco_erspan_timestamp CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "Timestamp", "cisco_erspan_marker.timestamp",
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FT_UINT32, BASE_DEC, NULL, 0xffffffff,
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NULL, HFILL };
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static header_field_info cisco_erspan_utc_sec CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "UTC Seconds", "cisco_erspan_marker.utc_sec",
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FT_UINT32, BASE_DEC, NULL, 0xffffffff,
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NULL, HFILL };
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static header_field_info cisco_erspan_utc_usec CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "UTC Microseconds", "cisco_erspan_marker.utc_usec",
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FT_UINT32, BASE_DEC, NULL, 0xffffffff,
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NULL, HFILL };
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static header_field_info cisco_erspan_sequence_number CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "Sequence Number", "cisco_erspan_marker.sequence_number",
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FT_UINT32, BASE_DEC, NULL, 0xffffffff,
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NULL, HFILL };
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static header_field_info cisco_erspan_reserved CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "Reserved", "cisco_erspan_marker.sequence_number",
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FT_UINT32, BASE_DEC, NULL, 0xffffffff,
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NULL, HFILL };
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static header_field_info cisco_erspan_tail CISCO_ERSPAN_MARKER_HFI_INIT =
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{ "TAIL", "cisco_erspan_marker.tail",
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FT_UINT32, BASE_DEC, NULL, 0xffffffff,
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NULL, HFILL };
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static gint ett_marker = -1;
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static int
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dissect_marker(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *marker_tree;
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proto_item *ti;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "CISCO ERSPAN3 MARKER");
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if (tree) {
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/* Skip the proprietary CISCO header - no docs have been released for this */
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guint32 offset = 20;
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ti = proto_tree_add_item(tree, hfi_marker, tvb, 0, -1, ENC_NA);
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marker_tree = proto_item_add_subtree(ti, ett_marker);
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proto_tree_add_item(marker_tree, &cisco_erspan_prop_header, tvb, 0, 20, ENC_LITTLE_ENDIAN);
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proto_tree_add_item(marker_tree, &cisco_erspan_info, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(marker_tree, &cisco_erspan_version, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(marker_tree, &cisco_erspan_type, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(marker_tree, &cisco_erspan_ssid, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(marker_tree, &cisco_erspan_granularity, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(marker_tree, &cisco_erspan_utcoffset, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset+= 2;
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proto_tree_add_item(marker_tree, &cisco_erspan_timestamp, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset+=4;
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proto_tree_add_item(marker_tree, &cisco_erspan_utc_sec, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset+=4;
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proto_tree_add_item(marker_tree, &cisco_erspan_utc_usec, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset+=4;
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proto_tree_add_item(marker_tree, &cisco_erspan_sequence_number, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset+=4;
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proto_tree_add_item(marker_tree, &cisco_erspan_reserved, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset+=4;
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proto_tree_add_item(marker_tree, &cisco_erspan_tail, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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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_erspan_marker(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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&cisco_erspan_prop_header,
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&cisco_erspan_info,
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&cisco_erspan_version,
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&cisco_erspan_type,
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&cisco_erspan_ssid,
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&cisco_erspan_granularity,
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&cisco_erspan_utcoffset,
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&cisco_erspan_timestamp,
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&cisco_erspan_utc_sec,
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&cisco_erspan_utc_usec,
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&cisco_erspan_sequence_number,
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&cisco_erspan_reserved,
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&cisco_erspan_tail
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};
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#endif
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static gint *ett[] = {
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&ett_marker,
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};
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int proto_marker;
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proto_marker = proto_register_protocol("CISCO ERSPAN3 Marker Packet", "CISCO3 ERSPAN MARKER", "cisco-erspan3-marker");
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hfi_marker = proto_registrar_get_nth(proto_marker);
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proto_register_fields(proto_marker, hfi, array_length(hfi));
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proto_register_subtree_array(ett, array_length(ett));
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marker_handle = create_dissector_handle(dissect_marker, proto_marker);
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}
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void
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proto_reg_handoff_erspan_marker(void)
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{
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dissector_add_for_decode_as_with_preference("udp.port", marker_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: 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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