Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 246 insertions, 0 deletions

diff --git a/epan/dissectors/packet-mpls-mac.c b/epan/dissectors/packet-mpls-mac.c
new file mode 100644
index 00000000..7bb27724
--- /dev/null
+++ b/epan/dissectors/packet-mpls-mac.c
@@ -0,0 +1,246 @@
+/* packet-mpls-mac.c
+ *
+ * Routines for MPLS Media Access Control (MAC) Address Withdrawal over Static Pseudowire.
+ *
+ * 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 "packet-mpls.h"
+
+void proto_register_mpls_mac(void);
+void proto_reg_handoff_mpls_mac(void);
+
+static dissector_handle_t mpls_mac_handle;
+
+static gint proto_mpls_mac = -1;
+
+static gint ett_mpls_mac = -1;
+static gint ett_mpls_mac_flags = -1;
+static gint ett_mpls_mac_tlv = -1;
+
+static int hf_mpls_mac_reserved = -1;
+static int hf_mpls_mac_tlv_length_total = -1;
+static int hf_mpls_mac_flags = -1;
+static int hf_mpls_mac_flags_a = -1;
+static int hf_mpls_mac_flags_r = -1;
+static int hf_mpls_mac_flags_reserved = -1;
+static int hf_mpls_mac_tlv = -1;
+static int hf_mpls_mac_tlv_res = -1;
+static int hf_mpls_mac_tlv_type = -1;
+static int hf_mpls_mac_tlv_length = -1;
+static int hf_mpls_mac_tlv_value = -1;
+static int hf_mpls_mac_tlv_sequence_number = -1;
+
+
+static int * const mpls_mac_flags[] = {
+  &hf_mpls_mac_flags_a,
+  &hf_mpls_mac_flags_r,
+  &hf_mpls_mac_flags_reserved,
+  NULL
+};
+
+static int
+dissect_mpls_mac(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+    proto_item *ti;
+    proto_tree *mac_tree;
+    guint32     offset = 0, tlv_length, offset_end;
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "MPLS-MAC");
+    col_clear(pinfo->cinfo, COL_INFO);
+
+    ti = proto_tree_add_item(tree, proto_mpls_mac, tvb, 0, -1, ENC_NA);
+    mac_tree = proto_item_add_subtree(ti, ett_mpls_mac);
+    /* Reserved */
+    proto_tree_add_item(mac_tree, hf_mpls_mac_reserved, tvb, offset, 2, ENC_NA);
+    offset += 2;
+    /* TLV length */
+    proto_tree_add_item_ret_uint(mac_tree, hf_mpls_mac_tlv_length_total, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_length);
+    offset += 1;
+    /* Flags */
+    proto_tree_add_bitmask(mac_tree, tvb, offset, hf_mpls_mac_flags,
+                         ett_mpls_mac_flags,
+                         mpls_mac_flags,
+                         ENC_BIG_ENDIAN);
+    offset += 1;
+    offset_end = offset + tlv_length;
+
+    while(offset < offset_end){
+        guint32 type, length;
+        proto_tree *tlv_tree;
+
+        ti = proto_tree_add_item(mac_tree, hf_mpls_mac_tlv, tvb, offset, 4, ENC_NA);
+
+        tlv_tree = proto_item_add_subtree(ti, ett_mpls_mac_tlv);
+        /* res(erved) */
+        proto_tree_add_item(tlv_tree, hf_mpls_mac_tlv_res, tvb, offset, 2, ENC_BIG_ENDIAN);
+
+        /* TLV Type */
+        proto_tree_add_item_ret_uint(tlv_tree, hf_mpls_mac_tlv_type, tvb, offset, 2, ENC_BIG_ENDIAN, &type);
+        offset += 2;
+
+        /* TLV Length */
+        proto_tree_add_item_ret_uint(tlv_tree, hf_mpls_mac_tlv_length, tvb, offset, 2, ENC_BIG_ENDIAN, &length);
+        offset += 2;
+        proto_item_set_len(ti, 2+2+length);
+        proto_item_append_text(ti, " (t=0x%x, l=%u)", type, length);
+
+        /* TLV Value */
+        proto_tree_add_item(tlv_tree, hf_mpls_mac_tlv_value, tvb, offset, length, ENC_NA);
+
+        switch(type){
+            case 0x0001:
+                proto_tree_add_item(tlv_tree, hf_mpls_mac_tlv_sequence_number, tvb, offset, 4, ENC_BIG_ENDIAN);
+                offset += 4;
+            break;
+            default:
+                offset += length;
+            break;
+        }
+
+    }
+    return offset;
+}
+
+void
+proto_register_mpls_mac(void)
+{
+    static hf_register_info hf[] = {
+        {
+            &hf_mpls_mac_reserved,
+            {
+                "Reserved", "mpls_mac.reserved",
+                FT_BYTES, BASE_NONE, NULL, 0x0,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_tlv_length_total,
+            {
+                "TLV Length (Total)", "mpls_mac.tlv_length_total",
+                FT_UINT8, BASE_DEC, NULL, 0x0,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_flags,
+            {
+                "Flags", "mpls_mac.flags",
+                FT_UINT8, BASE_HEX, NULL, 0x0,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_flags_a,
+            {
+                "Flags A", "mpls_mac.flags.a",
+                FT_BOOLEAN, 8, NULL, 0x80,
+                "set by a receiver to acknowledge receipt and processing of a MAC Address Withdraw OAM Message", HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_flags_r,
+            {
+                "Flags R", "mpls_mac.flags.r",
+                FT_BOOLEAN, 8, NULL, 0x40,
+                "Set to indicate if the sender is requesting reset of the sequence numbers", HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_flags_reserved,
+            {
+                "Flags Reserved", "mpls_mac.flags.reserved",
+                FT_UINT8, BASE_HEX, NULL, 0x3F,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_tlv,
+            {
+                "TLV", "mpls_mac.tlv",
+                FT_NONE, BASE_NONE, NULL, 0x0,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_tlv_res,
+            {
+                "Res(erved)", "mpls_mac.tlv.res",
+                FT_UINT16, BASE_HEX, NULL, 0xC000,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_tlv_type,
+            {
+                "TLV Type", "mpls_mac.tlv.type",
+                FT_UINT16, BASE_HEX, NULL, 0x3FFF,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_tlv_length,
+            {
+                "TLV Length", "mpls_mac.tlv.length",
+                FT_UINT16, BASE_DEC, NULL, 0x0,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_tlv_value,
+            {
+                "TLV Value", "mpls_mac.tlv.value",
+                FT_BYTES, BASE_NONE, NULL, 0x0,
+                NULL, HFILL
+            }
+        },
+        {
+            &hf_mpls_mac_tlv_sequence_number,
+            {
+                "Sequence Number", "mpls_mac.tlv.sequence_number",
+                FT_UINT32, BASE_DEC, NULL, 0x0,
+                NULL, HFILL
+            }
+        },
+    };
+
+    static gint *ett[] = {
+        &ett_mpls_mac,
+        &ett_mpls_mac_flags,
+        &ett_mpls_mac_tlv,
+    };
+
+    proto_mpls_mac =
+        proto_register_protocol("Media Access Control (MAC) Address Withdrawal over Static Pseudowire", "MPLS-MAC", "mpls_mac");
+
+    proto_register_field_array(proto_mpls_mac, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    mpls_mac_handle = register_dissector("mpls_mac", dissect_mpls_mac, proto_mpls_mac);
+}
+
+void
+proto_reg_handoff_mpls_mac(void)
+{
+    dissector_add_uint("pwach.channel_type", PW_ACH_TYPE_MAC, mpls_mac_handle);
+}
+
+/*
+ * 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:
+ */