forked from osmocom/wireshark
![Pascal Quantin](/assets/img/avatar_default.png)
Change-Id: I057ffc6eb5e6c16e05b0ddc1c069159980678b85 Reviewed-on: https://code.wireshark.org/review/16429 Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
253 lines
8.1 KiB
C
253 lines
8.1 KiB
C
/* packet-etag.c
|
|
*
|
|
* 802.1BR E-Tag dissector
|
|
* Inspired by packet-vntag.c
|
|
*
|
|
* Copyright 2016 APCON, Inc.
|
|
* Kim Kempf <kim.kempf@apcon.com>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <epan/packet.h>
|
|
#include <epan/etypes.h>
|
|
#include <epan/prefs.h>
|
|
|
|
void proto_register_etag(void);
|
|
void proto_reg_handoff_etag(void);
|
|
|
|
static dissector_handle_t ethertype_handle;
|
|
|
|
static int proto_etag = -1;
|
|
|
|
static gboolean etag_summary_in_tree = TRUE;
|
|
|
|
static int hf_etag_etype = -1;
|
|
static int hf_etag_pcp = -1;
|
|
static int hf_etag_dei = -1;
|
|
static int hf_etag_res = -1;
|
|
static int hf_etag_grp = -1;
|
|
static int hf_etag_iecid_base = -1;
|
|
static int hf_etag_iecid_ext = -1;
|
|
static int hf_etag_ecid_base = -1;
|
|
static int hf_etag_ecid_ext = -1;
|
|
|
|
static int hf_etag_trailer = -1;
|
|
|
|
static gint ett_etag = -1;
|
|
|
|
#define IEEE8021BR_LEN 8 /* length including ethertype */
|
|
|
|
/* From Table G-2 of IEEE standard 802.1D-2004 */
|
|
static const value_string pri_vals[] = {
|
|
{ 1, "Background" },
|
|
{ 2, "Spare" },
|
|
{ 0, "Best Effort (default)" },
|
|
{ 3, "Excellent Effort" },
|
|
{ 4, "Controlled Load" },
|
|
{ 5, "Video, < 100ms latency and jitter" },
|
|
{ 6, "Voice, < 10ms latency and jitter" },
|
|
{ 7, "Network Control" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
|
|
static const value_string grp_vals[] = {
|
|
{ 0, "Point-to-point" },
|
|
{ 1, "Point-to-multipoint" },
|
|
{ 2, "Point-to-multipoint" },
|
|
{ 3, "Point-to-multipoint" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
From 801.2BR 7.5 E-TAG Control Information
|
|
0 1
|
|
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| |
|
|
| |
|
|
| E-Tag EtherType |
|
|
| 0x893F |
|
|
| |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| |E| |
|
|
| |-| |
|
|
|E-PCP|D| Ingress_E-CID_base |
|
|
| |E| |
|
|
| |I| |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| | | |
|
|
| R | G | |
|
|
| E | R | E-CID_base |
|
|
| S | P | |
|
|
| V | | |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| | |
|
|
| | |
|
|
|Ingress_E-CID_ | E_CID_ext |
|
|
| ext | |
|
|
| | |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*/
|
|
|
|
static int
|
|
dissect_etag(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
guint16 encap_proto;
|
|
proto_tree *etag_tree = NULL;
|
|
ethertype_data_t ethertype_data;
|
|
|
|
guint64 tci;
|
|
|
|
/* Decoding per IEEE802.1BR-2012 */
|
|
static const int * fields1[] = {
|
|
&hf_etag_pcp,
|
|
&hf_etag_dei,
|
|
&hf_etag_iecid_base,
|
|
NULL
|
|
};
|
|
|
|
static const int * fields2[] = {
|
|
&hf_etag_res,
|
|
&hf_etag_grp,
|
|
&hf_etag_ecid_base,
|
|
NULL
|
|
};
|
|
|
|
tci = tvb_get_ntoh48( tvb, 0);
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ETAG");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
if (tree) {
|
|
guint32 e_cid, ing_e_cid;
|
|
|
|
proto_item *ti = proto_tree_add_item(tree, proto_etag, tvb, 0, IEEE8021BR_LEN - 2, ENC_NA);
|
|
|
|
e_cid = (guint32)((((tci >> 16) & 0xFFF) | (tci << 12)) & 0xFFFFF); /* E-CID_base | E-CID_ext */
|
|
ing_e_cid = (guint32)((((tci >> 32) & 0xFFF) | ((tci << 4) & 0xFF000)) & 0xFFFFF); /* Ingress_E-CID_base | Ingress_E-CID ext */
|
|
|
|
if (etag_summary_in_tree) {
|
|
proto_item_append_text(ti, ", TCI: 0x%" G_GINT64_MODIFIER "x Ingress_E-CID: %u E-CID: %u", tci, ing_e_cid, e_cid);
|
|
}
|
|
etag_tree = proto_item_add_subtree(ti, ett_etag);
|
|
|
|
proto_tree_add_bitmask_list(etag_tree, tvb, 0, 2, fields1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_bitmask_list(etag_tree, tvb, 2, 2, fields2, ENC_BIG_ENDIAN);
|
|
|
|
proto_tree_add_item(etag_tree, hf_etag_iecid_ext, tvb, 4, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(etag_tree, hf_etag_ecid_ext, tvb, 5, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
encap_proto = tvb_get_ntohs(tvb, IEEE8021BR_LEN - 2);
|
|
|
|
ethertype_data.etype = encap_proto;
|
|
ethertype_data.offset_after_ethertype = IEEE8021BR_LEN;
|
|
ethertype_data.fh_tree = etag_tree;
|
|
ethertype_data.etype_id = hf_etag_etype;
|
|
ethertype_data.trailer_id = hf_etag_trailer;
|
|
ethertype_data.fcs_len = 0;
|
|
|
|
call_dissector_with_data(ethertype_handle, tvb, pinfo, tree, ðertype_data);
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_register_etag(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_etag_pcp,
|
|
{ "E-PCP", "etag.pcp", FT_UINT16, BASE_DEC, VALS(pri_vals), 0xE000,
|
|
"Descriptions are recommendations from IEEE standard 802.1D-2004", HFILL }
|
|
},
|
|
{ &hf_etag_dei,
|
|
{ "E-DEI", "etag.dei", FT_UINT16, BASE_DEC, NULL, 0x1000, NULL, HFILL }
|
|
},
|
|
{ &hf_etag_iecid_base,
|
|
{ "Ingress_E-CID_base", "etag.iecid_base", FT_UINT16, BASE_HEX, NULL, 0x0FFF, NULL, HFILL }
|
|
},
|
|
{ &hf_etag_res,
|
|
{ "Reserved", "etag.resv", FT_UINT16, BASE_DEC, NULL, 0xC000, NULL, HFILL }
|
|
},
|
|
{ &hf_etag_grp,
|
|
{ "GRP", "etag.group", FT_UINT16, BASE_DEC, VALS(grp_vals), 0x3000, NULL, HFILL }
|
|
},
|
|
{ &hf_etag_ecid_base,
|
|
{ "E-CID_base", "etag.ecid_base", FT_UINT16, BASE_HEX, NULL, 0xFFF, NULL, HFILL }
|
|
},
|
|
{ &hf_etag_iecid_ext,
|
|
{ "Ingress_E-CID_ext", "etag.iecid_ext", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_etag_ecid_ext,
|
|
{ "E-CID_ext", "etag.ecid_ext", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_etag_etype,
|
|
{ "Type", "etag.etype", FT_UINT16, BASE_HEX, VALS(etype_vals), 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_etag_trailer,
|
|
{ "Trailer", "etag.trailer", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_etag
|
|
};
|
|
|
|
module_t *etag_module;
|
|
|
|
proto_etag = proto_register_protocol("802.1BR E-Tag", "ETAG", "etag");
|
|
proto_register_field_array(proto_etag, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
etag_module = prefs_register_protocol(proto_etag, proto_reg_handoff_etag);
|
|
prefs_register_bool_preference(etag_module, "summary_in_tree",
|
|
"Show E-Tag summary in protocol tree",
|
|
"Whether the E-Tag summary line should be shown in the protocol tree",
|
|
&etag_summary_in_tree);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_etag(void)
|
|
{
|
|
dissector_handle_t etag_handle;
|
|
|
|
etag_handle = create_dissector_handle(dissect_etag, proto_etag);
|
|
dissector_add_uint("ethertype", ETHERTYPE_IEEE_802_1BR, etag_handle);
|
|
|
|
ethertype_handle = find_dissector_add_dependency("ethertype", proto_etag);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|