Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 182 insertions, 0 deletions

diff --git a/epan/dissectors/packet-vmlab.c b/epan/dissectors/packet-vmlab.c
new file mode 100644
index 00000000..41890b61
--- /dev/null
+++ b/epan/dissectors/packet-vmlab.c
@@ -0,0 +1,182 @@
+/* packet-vmlab.c
+ * Routines for VMware Lab Manager Frame Dis-assembly
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+
+/* 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.
+ *
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/addr_resolv.h>
+#include <epan/etypes.h>
+
+void proto_register_vmlab(void);
+void proto_reg_handoff_vmlab(void);
+
+static dissector_handle_t vmlab_handle;
+static dissector_handle_t ethertype_handle;
+
+static int proto_vmlab = -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 int
+dissect_vmlab(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+    proto_tree*     vmlab_tree;
+    proto_item*     ti;
+
+    guint32         offset=0;
+
+    guint8          attributes;
+    guint8          portgroup;
+    ethertype_data_t ethertype_data;
+
+    guint16         encap_proto;
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "VMLAB");
+    col_clear(pinfo->cinfo, COL_INFO);
+
+    ti = proto_tree_add_item(tree, proto_vmlab, tvb, 0, 24, ENC_NA);
+    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, ENC_BIG_ENDIAN);
+    proto_tree_add_item(vmlab_tree, hf_vmlab_flags_fragment, tvb, offset, 1, ENC_BIG_ENDIAN);
+    proto_tree_add_item(vmlab_tree, hf_vmlab_flags_part2,    tvb, offset, 1, ENC_BIG_ENDIAN);
+    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*/
+    proto_tree_add_item(vmlab_tree, hf_vmlab_eth_addr, tvb, offset, 6, ENC_NA);
+    offset += 6;
+
+    proto_tree_add_item(vmlab_tree, hf_vmlab_eth_dst, tvb, offset, 6, ENC_NA);
+    offset += 6;
+
+    /* Source MAC*/
+    proto_tree_add_item(vmlab_tree, hf_vmlab_eth_src, tvb, offset, 6, ENC_NA);
+    offset += 6;
+
+    proto_item_append_text(ti, ", Src: %s, Dst: %s",
+                           tvb_address_with_resolution_to_str(pinfo->pool, tvb, AT_ETHER, offset-6),
+                           tvb_address_with_resolution_to_str(pinfo->pool, tvb, AT_ETHER, offset-12));
+
+    /* Encapsulated Ethertype is also part of the block*/
+    encap_proto = tvb_get_ntohs(tvb, offset);
+    proto_tree_add_uint(vmlab_tree, hf_vmlab_etype, tvb, offset, 2, encap_proto);
+    offset += 2;
+
+    /* Now call whatever was encapsulated*/
+    ethertype_data.etype = encap_proto;
+    ethertype_data.payload_offset = offset;
+    ethertype_data.fh_tree = vmlab_tree;
+    ethertype_data.trailer_id = hf_vmlab_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_vmlab(void)
+{
+    static hf_register_info hf[] = {
+
+        { &hf_vmlab_flags_part1,    { "Unknown", "vmlab.unknown1",
+            FT_UINT8, BASE_HEX,  NULL, 0xF8, NULL, HFILL }},
+        { &hf_vmlab_flags_fragment, { "More Fragments", "vmlab.fragment",
+            FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x04, NULL, HFILL }},
+        { &hf_vmlab_flags_part2,    { "Unknown", "vmlab.unknown2",
+            FT_UINT8, BASE_HEX,  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
+    };
+
+    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_handle = register_dissector("vmlab", dissect_vmlab, proto_vmlab);
+}
+
+void
+proto_reg_handoff_vmlab(void)
+{
+    dissector_add_uint("ethertype", ETHERTYPE_VMLAB, vmlab_handle);
+
+    ethertype_handle = find_dissector_add_dependency("ethertype", proto_vmlab);
+}
+
+/*
+ * Editor modelines  -  https://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:
+ */