--- /dev/null
+/* 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 = (((tci >> 16) & 0xFFF) | (tci << 12)) & 0xFFFFF; /* E-CID_base | E-CID_ext */
+ ing_e_cid = (((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:
+ */
git.samba.org / metze / wireshark / wip.git / commitdiff