Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 183 insertions, 0 deletions

diff --git a/epan/dissectors/packet-llt.c b/epan/dissectors/packet-llt.c
new file mode 100644
index 00000000..7dcf0a4a
--- /dev/null
+++ b/epan/dissectors/packet-llt.c
@@ -0,0 +1,183 @@
+/* packet-llt.c
+ * Routines for Veritas Low Latency Transport (LLT) dissection
+ * Copyright 2006, Stephen Fisher (see AUTHORS file)
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/prefs.h>
+#include <epan/etypes.h>
+
+void proto_register_llt(void);
+void proto_reg_handoff_llt(void);
+
+static dissector_handle_t llt_handle;
+
+static const value_string message_type_vs[] = {
+	{ 0x0a, "heartbeat" },
+	{ 0, NULL}
+};
+
+/* Variables for our preferences */
+static guint preference_alternate_ethertype = 0x0;
+
+/* Initialize the protocol and registered fields */
+static int proto_llt = -1;
+
+static int hf_llt_cluster_num = -1;
+static int hf_llt_node_id = -1;
+static int hf_llt_message_type = -1;
+static int hf_llt_sequence_num = -1;
+static int hf_llt_message_time = -1;
+static int hf_llt_dst_node_id = -1;
+static int hf_llt_src_node_id = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_llt = -1;
+
+/* Code to actually dissect the packets */
+static int
+dissect_llt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+	/* Set up structures needed to add the protocol subtree and manage it */
+	proto_item *ti;
+	proto_tree *llt_tree;
+	guint8 message_type;
+        guint16 magic;
+
+	/* Make entries in Protocol column and Info column on summary display */
+	col_set_str(pinfo->cinfo, COL_PROTOCOL, "LLT");
+
+	magic = tvb_get_guint16(tvb, 0, ENC_BIG_ENDIAN);
+	if(magic == 0x0602){ /* v2 ? */
+
+		ti = proto_tree_add_item(tree, proto_llt, tvb, 0, -1, ENC_NA);
+		llt_tree = proto_item_add_subtree(ti, ett_llt);
+
+		proto_tree_add_item(llt_tree, hf_llt_cluster_num, tvb, 2, 2, ENC_LITTLE_ENDIAN);
+		proto_tree_add_item(llt_tree, hf_llt_dst_node_id, tvb, 6, 1, ENC_LITTLE_ENDIAN);
+		proto_tree_add_item(llt_tree, hf_llt_src_node_id, tvb, 8, 1, ENC_LITTLE_ENDIAN);
+
+	} else {
+		message_type = tvb_get_guint8(tvb, 3);
+
+		col_add_fstr(pinfo->cinfo, COL_INFO, "Message type: %s", val_to_str(message_type, message_type_vs, "Unknown (0x%02x)"));
+
+		ti = proto_tree_add_item(tree, proto_llt, tvb, 0, -1, ENC_NA);
+		llt_tree = proto_item_add_subtree(ti, ett_llt);
+
+		proto_tree_add_item(llt_tree, hf_llt_cluster_num, tvb, 2, 1, ENC_BIG_ENDIAN);
+		proto_tree_add_item(llt_tree, hf_llt_message_type, tvb, 3, 1, ENC_BIG_ENDIAN);
+		proto_tree_add_item(llt_tree, hf_llt_node_id, tvb, 7, 1, ENC_BIG_ENDIAN);
+		proto_tree_add_item(llt_tree, hf_llt_sequence_num, tvb, 24, 4, ENC_BIG_ENDIAN);
+		proto_tree_add_item(llt_tree, hf_llt_message_time, tvb, 40, 4, ENC_BIG_ENDIAN);
+	}
+	return tvb_captured_length(tvb);
+}
+
+/* Register the protocol with Wireshark */
+void
+proto_register_llt(void)
+{
+	module_t *llt_module;
+
+	static hf_register_info hf[] = {
+
+		{ &hf_llt_cluster_num,  { "Cluster number", "llt.cluster_num",
+					  FT_UINT16, BASE_DEC, NULL, 0,
+					  "Cluster number that this node belongs to", HFILL } },
+
+		{ &hf_llt_message_type, { "Message type", "llt.message_type",
+					  FT_UINT8, BASE_HEX, VALS(message_type_vs), 0,
+					  "Type of LLT message contained in this frame", HFILL } },
+
+		{ &hf_llt_node_id,      { "Node ID", "llt.node_id",
+					  FT_UINT8, BASE_DEC, NULL, 0,
+					  "Number identifying this node within the cluster", HFILL } },
+
+		{ &hf_llt_sequence_num, { "Sequence number", "llt.sequence_num",
+					  FT_UINT32, BASE_DEC, NULL, 0,
+					  "Sequence number of this frame", HFILL } },
+
+		{ &hf_llt_message_time, { "Message time", "llt.message_time",
+					  FT_UINT32, BASE_DEC, NULL, 0,
+					  "Number of ticks since this node was last rebooted", HFILL } },
+
+		{ &hf_llt_dst_node_id,  { "Destination Node ID", "llt.dst.node_id",
+					  FT_UINT8, BASE_DEC, NULL, 0,
+					  "Number identifying destination node within the cluster", HFILL } },
+
+		{ &hf_llt_src_node_id,  { "Source Node ID", "llt.src.node_id",
+					  FT_UINT8, BASE_DEC, NULL, 0,
+					  "Number identifying source node within the cluster", HFILL } },
+
+	};
+
+	/* Setup protocol subtree array */
+	static gint *ett[] = {
+		&ett_llt,
+	};
+
+	/* Register the protocol name and description */
+	proto_llt = proto_register_protocol("Veritas Low Latency Transport (LLT)", "LLT", "llt");
+
+	/* Required function calls to register the header fields and subtrees used */
+	proto_register_field_array(proto_llt, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+
+	/* Register preferences module */
+	llt_module = prefs_register_protocol(proto_llt, proto_reg_handoff_llt);
+
+	/* Register our preferences */
+	prefs_register_uint_preference(llt_module, "alternate_ethertype", "Alternate ethertype value (in hex)",
+				       "Dissect this ethertype as LLT traffic in addition to the default, 0xCAFE.",
+				       16, &preference_alternate_ethertype); /* A base-16 (hexadecimal) value */
+
+	/* Register our dissector */
+	llt_handle = register_dissector("llt", dissect_llt, proto_llt);
+}
+
+
+void
+proto_reg_handoff_llt(void)
+{
+	static gboolean initialized = FALSE;
+	static guint preference_alternate_ethertype_last;
+
+	if (!initialized) {
+		dissector_add_uint("ethertype", ETHERTYPE_LLT, llt_handle);
+		initialized = TRUE;
+	} else {
+		if (preference_alternate_ethertype_last != 0x0) {
+			dissector_delete_uint("ethertype", preference_alternate_ethertype_last, llt_handle);
+		}
+	}
+
+	/* Save the setting to see if it has changed later */
+	preference_alternate_ethertype_last = preference_alternate_ethertype;
+
+	if (preference_alternate_ethertype != 0x0) {
+ 		/* Register the new ethertype setting */
+		dissector_add_uint("ethertype", preference_alternate_ethertype, llt_handle);
+	}
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */