Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 262 insertions, 0 deletions

diff --git a/epan/dissectors/packet-hsr-prp-supervision.c b/epan/dissectors/packet-hsr-prp-supervision.c
new file mode 100644
index 00000000..139b60d9
--- /dev/null
+++ b/epan/dissectors/packet-hsr-prp-supervision.c
@@ -0,0 +1,262 @@
+/* packet-hsr-prp-supervision.c
+ * Routines for HSR/PRP supervision dissection (IEC62439 Part 3)
+ * Copyright 2009, Florian Reichert <refl[AT]zhaw.ch>
+ * Copyright 2011, Martin Renold <reld[AT]zhaw.ch>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald[AT]wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/etypes.h>
+
+void proto_register_hsr_prp_supervision(void);
+void proto_reg_handoff_hsr_prp_supervision(void);
+
+static dissector_handle_t hsr_prp_supervision_handle;
+
+/**********************************************************/
+/* Channel values for the supervision type field          */
+/**********************************************************/
+
+static const value_string type_vals[] = {
+    {20, "PRP Node (Duplicate Discard)"},
+    {21, "PRP Node (Duplicate Accept)"},
+    {22, "Obsolete TLV value"},
+    {23, "HSR Node"},
+    {30, "Redundancy Box MAC Address"},
+    {31, "Virtual Dual Attached Node"},
+    {0,  "End of TLVs"},
+    {0,  NULL}
+};
+
+/**********************************************************/
+/* Initialize the protocol and registered fields          */
+/**********************************************************/
+
+static int proto_hsr_prp_supervision = -1;
+
+/* Initialize supervision frame fields */
+static int hf_hsr_prp_supervision_path = -1;
+static int hf_hsr_prp_supervision_version = -1;
+static int hf_hsr_prp_supervision_seqno = -1;
+static int hf_hsr_prp_supervision_tlv_type = -1;
+static int hf_hsr_prp_supervision_tlv_length = -1;
+static int hf_hsr_prp_supervision_source_mac_address_A = -1;
+static int hf_hsr_prp_supervision_source_mac_address_B = -1;
+static int hf_hsr_prp_supervision_source_mac_address = -1;
+static int hf_hsr_prp_supervision_red_box_mac_address = -1;
+static int hf_hsr_prp_supervision_vdan_mac_address = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_hsr_prp_supervision = -1;
+
+/* Code to actually dissect the packets */
+static int
+dissect_hsr_prp_supervision(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+    proto_item *ti;
+    proto_tree *hsr_prp_supervision_tree;
+    guint8 tlv_type;
+    guint8 tlv_length;
+    guint16 sup_version;
+    int offset;
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "HSR/PRP");
+
+    /* may get modified later while parsing */
+    col_set_str(pinfo->cinfo, COL_INFO, "HSR or PRP Supervision");
+
+    /* create display subtree for the protocol */
+    ti = proto_tree_add_item(tree, proto_hsr_prp_supervision, tvb, 0, -1, ENC_NA);
+
+    hsr_prp_supervision_tree = proto_item_add_subtree(ti, ett_hsr_prp_supervision);
+
+    offset = 0;
+
+    /* SupVersion */
+    proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_path,
+                        tvb, offset, 2, ENC_BIG_ENDIAN);
+    proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_version,
+                        tvb, offset, 2, ENC_BIG_ENDIAN);
+    sup_version = tvb_get_ntohs(tvb, 0) & 0x0fff;
+    offset += 2;
+
+    if (sup_version > 0) {
+        /* SupSequenceNumber */
+        proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_seqno,
+                            tvb, offset, 2, ENC_BIG_ENDIAN);
+        offset += 2;
+    }
+
+    while (tvb_reported_length_remaining(tvb, offset) > 0) {
+        /* TLV.type */
+        tlv_type = tvb_get_guint8(tvb, offset);
+        proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_tlv_type,
+                            tvb, offset, 1, ENC_BIG_ENDIAN);
+        offset += 1;
+
+        /* TLV.length */
+        tlv_length = tvb_get_guint8(tvb, offset);
+        proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_tlv_length,
+                            tvb, offset, 1, ENC_BIG_ENDIAN);
+        offset += 1;
+
+        /* TLV.value */
+        if ((tlv_type == 20 || tlv_type == 21 || tlv_type == 23) && (tlv_length == 6 || tlv_length == 12)) {
+            if (tlv_type == 23) {
+                col_set_str(pinfo->cinfo, COL_INFO, "HSR Supervision");
+            } else {
+                col_set_str(pinfo->cinfo, COL_INFO, "PRP Supervision");
+            }
+            if (tlv_length == 12) {
+                /* MacAddressA, MacAddressB (PRP only) */
+                proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_source_mac_address_A,
+                                    tvb, offset, 6, ENC_NA);
+                proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_source_mac_address_B,
+                                    tvb, offset+6, 6, ENC_NA);
+                /* PRP-0 supervision: if the node is not a RedBox, we have
+                   just read the last TLV. The next two octets are
+                   required to be zero by PRP-0. We will dissect those as
+                   "end of list" and break. */
+            } else {
+                /* MacAddress */
+                proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_source_mac_address,
+                                    tvb, offset, 6, ENC_NA);
+            }
+        } else if (tlv_type == 30 && tlv_length == 6) {
+            /* RedBoxMacAddress */
+            proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_red_box_mac_address,
+                                tvb, offset, 6, ENC_NA);
+            if (sup_version == 0) {
+                /* PRP-0 supervision: end of TLV data. Stop now, don't
+                   interpret the padding. */
+                offset += tlv_length;
+                break;
+            }
+        } else if (tlv_type == 31 && tlv_length == 6) {
+            /* VdanMacAddress */
+            proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_vdan_mac_address,
+                                tvb, offset, 6, ENC_NA);
+            if (sup_version == 0) {
+                /* PRP-0 supervision: end of TLV data, padding starts */
+                offset += tlv_length;
+                break;
+            }
+        } else if (tlv_type == 0) {
+            /* End of TLV list. */
+            offset += tlv_length;
+            break;
+        } else {
+            /* unknown TLV.type, or unexpected TLV.length */
+        }
+        offset += tlv_length;
+    }
+
+    proto_item_set_len(ti, offset);
+    /* Adjust the length of this tvbuff to include only the supervision data.
+       This allows the rest to be marked as padding. */
+    tvb_set_reported_length(tvb, offset);
+    return tvb_captured_length(tvb);
+}
+
+
+/* Register the protocol with Wireshark */
+void proto_register_hsr_prp_supervision(void)
+{
+
+    static hf_register_info hf[] = {
+
+        { &hf_hsr_prp_supervision_path,
+            { "Path", "hsr_prp_supervision.path",
+            FT_UINT16, BASE_DEC, NULL, 0xf000,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_version,
+            { "Version", "hsr_prp_supervision.version",
+            FT_UINT16, BASE_DEC, NULL, 0x0fff,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_seqno,
+            { "Sequence number", "hsr_prp_supervision.supervision_seqno",
+            FT_UINT16, BASE_DEC, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_tlv_type,
+            { "TLV type", "hsr_prp_supervision.tlv.type",
+            FT_UINT8, BASE_DEC, VALS(type_vals), 0x00,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_tlv_length,
+            { "TLV length", "hsr_prp_supervision.tlv.length",
+            FT_UINT8, BASE_DEC, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_source_mac_address_A,
+            { "Source MAC Address A", "hsr_prp_supervision.source_mac_address_A",
+            FT_ETHER, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_source_mac_address_B,
+            { "Source MAC Address B", "hsr_prp_supervision.source_mac_address_B",
+            FT_ETHER, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_source_mac_address,
+            { "Source MAC Address", "hsr_prp_supervision.source_mac_address",
+            FT_ETHER, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_red_box_mac_address,
+            { "RedBox MAC Address", "hsr_prp_supervision.red_box_mac_address",
+            FT_ETHER, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_hsr_prp_supervision_vdan_mac_address,
+            { "VDAN MAC Address", "hsr_prp_supervision.vdan_mac_address",
+            FT_ETHER, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        }
+    };
+
+
+    static gint *ett[] = {
+        &ett_hsr_prp_supervision
+    };
+
+    /* Register the protocol name and description */
+    proto_hsr_prp_supervision = proto_register_protocol("HSR/PRP Supervision (IEC62439 Part 3)",
+                        "HSR_PRP_SUPERVISION", "hsr_prp_supervision");
+
+
+    /* Required function calls to register the header fields and subtree used */
+    proto_register_field_array(proto_hsr_prp_supervision, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    hsr_prp_supervision_handle = register_dissector("hsr_prp_supervision",
+                        dissect_hsr_prp_supervision, proto_hsr_prp_supervision);
+}
+
+
+void proto_reg_handoff_hsr_prp_supervision(void)
+{
+    dissector_add_uint("ethertype", ETHERTYPE_PRP, hsr_prp_supervision_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:
+ */