Add initial version of a dissector for the Paloalto heartbeat backup protocol.

Change-Id: I79b6c42df983c6dae6cce866f3cfdd673a6a7f0b
Reviewed-on: https://code.wireshark.org/review/35721
Petri-Dish: Jörg Mayer <jmayer@loplof.de>
Tested-by: Petri Dish Buildbot
Reviewed-by: Jörg Mayer <jmayer@loplof.de>

2 files changed, 123 insertions, 0 deletions

diff --git a/epan/dissectors/CMakeLists.txt b/epan/dissectors/CMakeLists.txt
index 3a8d8049a7..27039f81b9 100644
--- a/epan/dissectors/CMakeLists.txt
+++ b/epan/dissectors/CMakeLists.txt
@@ -1531,6 +1531,7 @@ set(DISSECTOR_SRC
 	${CMAKE_CURRENT_SOURCE_DIR}/packet-ossp.c
 	${CMAKE_CURRENT_SOURCE_DIR}/packet-ouch.c
 	${CMAKE_CURRENT_SOURCE_DIR}/packet-p_mul.c
+	${CMAKE_CURRENT_SOURCE_DIR}/packet-pa-hbbackup.c
 	${CMAKE_CURRENT_SOURCE_DIR}/packet-pathport.c
 	${CMAKE_CURRENT_SOURCE_DIR}/packet-packetbb.c
 	${CMAKE_CURRENT_SOURCE_DIR}/packet-packetlogger.c
diff --git a/epan/dissectors/packet-pa-hbbackup.c b/epan/dissectors/packet-pa-hbbackup.c
new file mode 100644
index 0000000000..7fa92f81aa
--- /dev/null
+++ b/epan/dissectors/packet-pa-hbbackup.c
@@ -0,0 +1,122 @@
+/* packet-hbbak.c
+ * Routines for ethertype 0x8988 Paloalto heartbeat backup traffic via mgmt
+ *
+ * Copyright 2020 Joerg Mayer (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
+ */
+
+/* 2do:
+ * - Find out the meaning of the 6 bytes header: timestamp?
+ * - Handle trailer bytes correctly
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/etypes.h>
+
+void proto_reg_handoff_hbbak(void);
+void proto_register_hbbak(void);
+
+#define PROTO_SHORT_NAME "PA-HB-Bak"
+#define PROTO_LONG_NAME "Paloalto Heartbeat Backup"
+
+#define HBBAK_SIZE 8
+
+static int proto_hbbak = -1;
+static int hf_hbbak_unknown1 = -1;
+static int hf_hbbak_etype_outer = -1;
+static int hf_hbbak_trailer = -1;
+
+static gint ett_hbbak = -1;
+
+static dissector_handle_t ethertype_handle;
+
+static int
+dissect_hbbak(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+	proto_tree *ti, *hbbak_tree;
+	int offset = 0;
+	guint16 eth_type_outer;
+	ethertype_data_t ethertype_data;
+
+	col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
+	col_clear(pinfo->cinfo, COL_INFO);
+	col_add_fstr(pinfo->cinfo, COL_INFO, PROTO_LONG_NAME);
+
+	hbbak_tree = NULL;
+	ti = proto_tree_add_item(tree, proto_hbbak, tvb, offset, HBBAK_SIZE, ENC_NA);
+	hbbak_tree = proto_item_add_subtree(ti, ett_hbbak);
+
+	proto_tree_add_item(hbbak_tree, hf_hbbak_unknown1, tvb, offset, 6, ENC_NA);
+	offset += 6;
+	eth_type_outer = tvb_get_ntohs(tvb, offset);
+	// offset += 2;
+
+	ethertype_data.etype = eth_type_outer;
+	ethertype_data.offset_after_ethertype = HBBAK_SIZE;
+	ethertype_data.fh_tree = hbbak_tree;
+	ethertype_data.etype_id = hf_hbbak_etype_outer;
+	ethertype_data.trailer_id = hf_hbbak_trailer;
+	ethertype_data.fcs_len = 0;
+
+	call_dissector_with_data(ethertype_handle, tvb, pinfo, tree, &ethertype_data);
+
+	return tvb_captured_length(tvb);
+}
+
+void
+proto_register_hbbak(void)
+{
+	static hf_register_info hf[] = {
+		{ &hf_hbbak_unknown1,
+		{ "Unknown1", "hbbak.unknown1", FT_BYTES, BASE_NONE, NULL,
+			0x0, NULL, HFILL }},
+
+		{ &hf_hbbak_etype_outer,
+		{ "Type", "hbbak.etype", FT_UINT16, BASE_HEX, VALS(etype_vals),
+			0x0, NULL, HFILL }},
+
+		{ &hf_hbbak_trailer,
+		{ "Trailer", "hbbak.trailer", FT_BYTES, BASE_NONE, NULL,
+			0x0, NULL, HFILL }},
+
+	};
+
+	static gint *ett[] = {
+		&ett_hbbak,
+	};
+
+	proto_hbbak = proto_register_protocol(PROTO_LONG_NAME, PROTO_LONG_NAME, "hbbak");
+	proto_register_field_array(proto_hbbak, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+}
+
+void
+proto_reg_handoff_hbbak(void)
+{
+	dissector_handle_t hbbak_handle;
+
+	ethertype_handle = find_dissector_add_dependency("ethertype", proto_hbbak);
+
+	hbbak_handle = create_dissector_handle(dissect_hbbak, proto_hbbak);
+	dissector_add_uint("ethertype", ETHERTYPE_PA_HBBACKUP, hbbak_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:
+ */