From David Aggeler:

Support for VMware Lab Manager Host Spanning
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4186

svn path=/trunk/; revision=32380

1 files changed, 199 insertions, 0 deletions

diff --git a/epan/dissectors/packet-vmlab.c b/epan/dissectors/packet-vmlab.c
new file mode 100644
index 0000000000..8f7b58db87
--- /dev/null
+++ b/epan/dissectors/packet-vmlab.c
@@ -0,0 +1,199 @@
+/* packet-vmlab.c
+ * Routines for VMware Lab Manager Frame Dis-assembly
+ *
+ * $Id$
+ *
+ * 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.
+ */
+
+
+/* History
+ *
+ * Apr 4, 2010 - David Aggeler 
+ *
+ * - Initial version based on packet-vlan.c
+ *
+ *   VMware Lab Manager is using this encapsulation directly as Ethernet Frames 
+ *   or inside VLANs. The Ethernet type was originally registered to Akimbi, but VMware 
+ *   acquired this company in 2006. No public information found, so the decoding here 
+ *   is an educated guess. Since one of the features of Lab Manager is to separate
+ *   VMs with equal host name, IP and MAC Address, I expect the upper layer dissectors
+ *   (namely ARP, ICMP, IP, TCP) to create false alerts, since identical configurations 
+ *   may communicate at the same time. The main goal of this dissector is to be able 
+ *   to troubleshoot connectivity, preferably pings. It's also a little to understand
+ *   as to how host spanning fenced configurations actually talk.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib.h>
+#include <epan/addr_resolv.h>
+#include <epan/packet.h>
+#include <epan/etypes.h>
+#include <epan/prefs.h>
+
+void proto_reg_handoff_vmlab(void);
+
+static int proto_vmlab = -1;
+
+static int hf_vmlab_attributes = -1;
+
+static int hf_vmlab_flags_part1 = -1;		/* Unknown so far */
+static int hf_vmlab_flags_fragment = -1;
+static int hf_vmlab_flags_part2 = -1;		/* Unknown so far */
+
+static int hf_vmlab_portgroup = -1;
+static int hf_vmlab_eth_src = -1;
+static int hf_vmlab_eth_dst = -1;
+static int hf_vmlab_eth_addr = -1;
+static int hf_vmlab_etype = -1;
+static int hf_vmlab_trailer = -1;
+
+static gint ett_vmlab = -1;
+
+static const value_string fragment_vals[] = {
+	{ 0, "Not set" },
+	{ 1, "Set" },
+	{ 0, NULL }
+};
+
+static void
+dissect_vmlab(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+
+    proto_tree*	    volatile vmlab_tree;
+    proto_item*	    ti;
+    
+    guint32	    offset=0;
+
+    const guint8*   src_addr;
+    const guint8*   dst_addr;
+    const guint8*   eth_addr;
+    guint8	    attributes;
+    guint8	    portgroup;
+
+    volatile guint16 encap_proto;
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "VMLAB");
+    col_clear(pinfo->cinfo, COL_INFO);
+
+    vmlab_tree = NULL;
+
+    if (tree) {
+	ti = proto_tree_add_item(tree, proto_vmlab, tvb, 0, 24, FALSE);
+	vmlab_tree = proto_item_add_subtree(ti, ett_vmlab);
+   
+	/* Flags*/
+	attributes = tvb_get_guint8(tvb, offset);
+	proto_tree_add_item(vmlab_tree, hf_vmlab_flags_part1,    tvb, offset, 1, FALSE);
+	proto_tree_add_item(vmlab_tree, hf_vmlab_flags_fragment, tvb, offset, 1, FALSE);
+	proto_tree_add_item(vmlab_tree, hf_vmlab_flags_part2,    tvb, offset, 1, FALSE);
+	if (attributes & 0x04) {
+	    proto_item_append_text(ti, ", Fragment");
+	}
+	offset += 1;
+        
+	/* Portgroup*/
+	portgroup = tvb_get_guint8(tvb, offset);
+	proto_tree_add_uint(vmlab_tree, hf_vmlab_portgroup, tvb, offset, 1, portgroup);
+	proto_item_append_text(ti, ", Portgroup: %d", portgroup);
+	offset += 1;
+
+	/* The next two bytes were always 0x0000 as far as I could tell*/
+	offset += 2;
+
+	/* Not really clear, what the difference between this and the next MAC address is
+	 Both are usually equal*/
+	eth_addr=tvb_get_ptr(tvb, offset, 6);
+	proto_tree_add_ether(vmlab_tree, hf_vmlab_eth_addr, tvb, offset, 6, eth_addr);
+	offset += 6;
+
+	dst_addr=tvb_get_ptr(tvb, offset, 6);
+	proto_tree_add_ether(vmlab_tree, hf_vmlab_eth_dst, tvb, offset, 6, dst_addr);
+	offset += 6;
+
+	/* Source MAC*/
+	src_addr=tvb_get_ptr(tvb, offset, 6);
+	proto_tree_add_ether(vmlab_tree, hf_vmlab_eth_src, tvb, offset, 6, src_addr);
+	offset += 6;
+
+	proto_item_append_text(ti, ", Src: %s (%s), Dst: %s (%s)", 
+	    get_ether_name(src_addr), ether_to_str(src_addr), get_ether_name(dst_addr), ether_to_str(dst_addr));
+	
+	/*Encapsulated Ethertype is also part of the block*/
+	encap_proto = tvb_get_ntohs(tvb, offset);
+	offset += 2;
+    }
+
+    /* Now call whatever was encapsulated*/
+    ethertype(encap_proto, tvb, offset, pinfo, tree, vmlab_tree, hf_vmlab_etype, hf_vmlab_trailer, 0);
+
+}
+
+void
+proto_register_vmlab(void)
+{
+    static hf_register_info hf[] = {
+
+	{ &hf_vmlab_flags_part1,	{ "Unknown       ", "vmlab.unknown1", 
+	    FT_UINT8, FT_BOOLEAN, NULL, 0xF8, NULL, HFILL }},
+	{ &hf_vmlab_flags_fragment,	{ "More Fragments", "vmlab.fragment", 
+	    FT_UINT8, BASE_NONE, VALS(fragment_vals), 0x04, NULL, HFILL }},
+	{ &hf_vmlab_flags_part2,	{ "Unknown       ", "vmlab.unknown2", 
+	    FT_UINT8, FT_BOOLEAN, NULL, 0x03, NULL, HFILL }},
+
+	{ &hf_vmlab_portgroup,	{ "Portgroup        ", "vmlab.pgrp", 
+	    FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }},
+	{ &hf_vmlab_eth_src,	{ "Source           ", "vmlab.src", 
+	    FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }},
+	{ &hf_vmlab_eth_dst,	{ "Destination      ", "vmlab.dst", 
+	    FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }},
+	{ &hf_vmlab_eth_addr,	{ "Address          ", "vmlab.addr", 
+	    FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }},
+	{ &hf_vmlab_etype,	{ "Encapsulated Type", "vmlab.subtype", 
+	    FT_UINT16, BASE_HEX, VALS(etype_vals), 0x0, NULL, HFILL }},
+	{ &hf_vmlab_trailer,	{ "Trailer", "vmlab.trailer", 
+	    FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}
+    };
+    static gint *ett[] = {
+	&ett_vmlab
+    };
+
+    module_t *vmlab_module;
+
+    proto_vmlab = proto_register_protocol("VMware Lab Manager", "VMLAB", "vmlab");
+    proto_register_field_array(proto_vmlab, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    vmlab_module = prefs_register_protocol(proto_vmlab, proto_reg_handoff_vmlab);
+
+}
+
+void
+proto_reg_handoff_vmlab(void)
+{
+    static dissector_handle_t vmlab_handle;
+
+    vmlab_handle = create_dissector_handle(dissect_vmlab, proto_vmlab);
+
+    dissector_add("ethertype", ETHERTYPE_VMLAB, vmlab_handle);
+}