Add a dissector for http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-00

svn path=/trunk/; revision=39760

1 files changed, 240 insertions, 0 deletions

diff --git a/epan/dissectors/packet-vxlan.c b/epan/dissectors/packet-vxlan.c
new file mode 100644
index 0000000000..23775fb7ba
--- /dev/null
+++ b/epan/dissectors/packet-vxlan.c
@@ -0,0 +1,240 @@
+/* packet-vxlan.c
+ *
+ * Routines for Virtual eXtensible Local Area Network (VXLAN) packet dissection
+ *
+ * $Id$
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * Protocol ref:
+ * http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-00
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <epan/packet.h>
+
+
+
+static int proto_vxlan = -1;
+
+static int hf_vxlan_flags = -1;
+static int hf_vxlan_flag_b7 = -1;
+static int hf_vxlan_flag_b6 = -1;
+static int hf_vxlan_flag_b5 = -1;
+static int hf_vxlan_flag_b4 = -1;
+static int hf_vxlan_flag_i = -1;
+static int hf_vxlan_flag_b2 = -1;
+static int hf_vxlan_flag_b1 = -1;
+static int hf_vxlan_flag_b0 = -1;
+static int hf_vxlan_reserved_24 = -1;
+static int hf_vxlan_vni = -1;
+static int hf_vxlan_reserved_8 = -1;
+
+
+static int ett_vxlan = -1;
+static int ett_vxlan_flgs = -1;
+
+
+static dissector_handle_t eth_handle;
+
+static void
+dissect_vxlan(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	proto_tree *vxlan_tree, *flg_tree;
+	proto_item *ti, *flg_item;
+	tvbuff_t *next_tvb;
+	int offset = 0;
+
+	/* Make entry in Protocol column on summary display */
+	col_set_str(pinfo->cinfo, COL_PROTOCOL, "VxLAN");
+
+	col_clear(pinfo->cinfo, COL_INFO);
+
+	ti = proto_tree_add_item(tree, proto_vxlan, tvb, offset, -1, ENC_NA);
+	vxlan_tree = proto_item_add_subtree(ti, ett_vxlan);
+
+/*
+              0                   1                   2                   3
+            0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+        VXLAN Header:
+           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+           |R|R|R|R|I|R|R|R|            Reserved                           |
+           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+           |                VXLAN Network Identifier (VNI) |   Reserved    |
+           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+	/* Flags (8 bits) where the I flag MUST be set  to 1 for a valid
+     *    VXLAN Network ID (VNI).  The remaining 7 bits (designated "R") are
+     *    reserved fields and MUST be set to zero.
+	 */
+	flg_item = proto_tree_add_item(vxlan_tree, hf_vxlan_flags, tvb, offset, 1, ENC_BIG_ENDIAN);
+	flg_tree = proto_item_add_subtree(ti, ett_vxlan_flgs);
+
+	proto_tree_add_item(flg_tree, hf_vxlan_flag_b7, tvb, offset, 1, ENC_BIG_ENDIAN);
+	proto_tree_add_item(flg_tree, hf_vxlan_flag_b6, tvb, offset, 1, ENC_BIG_ENDIAN);
+	proto_tree_add_item(flg_tree, hf_vxlan_flag_b5, tvb, offset, 1, ENC_BIG_ENDIAN);
+	proto_tree_add_item(flg_tree, hf_vxlan_flag_b4, tvb, offset, 1, ENC_BIG_ENDIAN);
+
+	proto_tree_add_item(flg_tree, hf_vxlan_flag_i, tvb, offset, 1, ENC_BIG_ENDIAN);
+	proto_tree_add_item(flg_tree, hf_vxlan_flag_b2, tvb, offset, 1, ENC_BIG_ENDIAN);
+	proto_tree_add_item(flg_tree, hf_vxlan_flag_b1, tvb, offset, 1, ENC_BIG_ENDIAN);
+	proto_tree_add_item(flg_tree, hf_vxlan_flag_b0, tvb, offset, 1, ENC_BIG_ENDIAN);
+	offset++;
+
+	proto_tree_add_item(vxlan_tree, hf_vxlan_reserved_24, tvb, offset, 3, ENC_BIG_ENDIAN);
+	offset+=3;
+
+	proto_tree_add_item(vxlan_tree, hf_vxlan_vni, tvb, offset, 3, ENC_BIG_ENDIAN);
+	offset+=3;
+
+	
+	proto_tree_add_item(vxlan_tree, hf_vxlan_reserved_8, tvb, offset, 1, ENC_BIG_ENDIAN);
+	offset++;
+
+	next_tvb = tvb_new_subset_remaining(tvb, offset);
+	call_dissector(eth_handle, next_tvb, pinfo, tree);
+
+}
+
+
+/* Register VxLAN with Wireshark */
+void
+proto_register_vxlan(void)
+{
+	static hf_register_info hf[] = {
+		{ &hf_vxlan_flags,
+			{ "Flags", "vxlan.flags",
+				FT_UINT8, BASE_HEX, NULL, 0x00, 
+				NULL, HFILL 
+			},
+		},
+		{ &hf_vxlan_flag_b7,
+			{ "Reserved(R)", "vxlan.flag_b7",
+            FT_BOOLEAN, 8, NULL, 0x80,
+			 NULL, HFILL,
+			},
+		},
+		{ &hf_vxlan_flag_b6,
+			{ "Reserved(R)", "vxlan.flag_b6",
+            FT_BOOLEAN, 8, NULL, 0x40,
+			 NULL, HFILL,
+			},
+		},
+		{ &hf_vxlan_flag_b5,
+			{ "Reserved(R)", "vxlan.flag_b5",
+            FT_BOOLEAN, 8, NULL, 0x20,
+			 NULL, HFILL,
+			},
+		},
+		{ &hf_vxlan_flag_b4,
+			{ "Reserved(R)", "vxlan.flag_b4",
+            FT_BOOLEAN, 8, NULL, 0x10,
+			 NULL, HFILL,
+			},
+		},
+		{ &hf_vxlan_flag_i,
+			{ "VXLAN Network ID(VNI)", "vxlan.flag_i",
+            FT_BOOLEAN, 8, TFS(&tfs_present_not_present), 0x08,
+			 NULL, HFILL,
+			},
+		},
+		{ &hf_vxlan_flag_b2,
+			{ "Reserved(R)", "vxlan.flag_b2",
+            FT_BOOLEAN, 8, NULL, 0x10,
+			 NULL, HFILL,
+			},
+		},
+		{ &hf_vxlan_flag_b1,
+			{ "Reserved(R)", "vxlan.flag_b1",
+            FT_BOOLEAN, 8, NULL, 0x10,
+			 NULL, HFILL,
+			},
+		},
+		{ &hf_vxlan_flag_b0,
+			{ "Reserved(R)", "vxlan.flag_b0",
+            FT_BOOLEAN, 8, NULL, 0x10,
+			 NULL, HFILL,
+			},
+		},
+		{ &hf_vxlan_reserved_24,
+			{ "Reserved", "vxlan.reserved24",
+				FT_UINT24, BASE_HEX, NULL, 0x00, 
+				NULL, HFILL 
+			},
+		},
+		{ &hf_vxlan_vni,
+			{ "VXLAN Network Identifier (VNI)", "vxlan.vni",
+				FT_UINT24, BASE_DEC, NULL, 0x00, 
+				NULL, HFILL 
+			},
+		},
+		{ &hf_vxlan_reserved_8,
+			{ "Reserved", "vxlan.reserved8",
+				FT_UINT8, BASE_DEC, NULL, 0x00, 
+				NULL, HFILL 
+			},
+		},
+	};
+
+	/* Setup protocol subtree array */
+	static gint *ett[] = {
+		&ett_vxlan,
+		&ett_vxlan_flgs,
+	};
+
+		/* Register the protocol name and description */
+	proto_vxlan = proto_register_protocol("Virtual eXtensible Local Area Network",
+			"VXLAN", "vxlan");
+
+	/* Required function calls to register the header fields and subtrees used */
+	proto_register_field_array(proto_vxlan, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+
+
+}
+
+void
+proto_reg_handoff_vxlan(void)
+{
+    dissector_handle_t vxlan_handle;
+
+	eth_handle = find_dissector("eth");
+
+    vxlan_handle = create_dissector_handle(dissect_vxlan, proto_vxlan);
+    dissector_add_handle("udp.port", vxlan_handle);  /* For 'Decode As' */
+}
+
+/*
+ * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */
+
+