Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 178 insertions, 0 deletions

diff --git a/epan/dissectors/packet-ripng.c b/epan/dissectors/packet-ripng.c
new file mode 100644
index 00000000..8df74457
--- /dev/null
+++ b/epan/dissectors/packet-ripng.c
@@ -0,0 +1,178 @@
+/* packet-ripng.c
+ * Routines for RIPng disassembly
+ * (c) Copyright Jun-ichiro itojun Hagino <itojun@itojun.org>
+ * derived from packet-rip.c
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * Enhance RIPng by Alexis La Goutte
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * References:
+ * RFC2080: RIPng for IPv6
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/to_str.h>
+
+void proto_register_ripng(void);
+void proto_reg_handoff_ripng(void);
+
+static dissector_handle_t ripng_handle;
+
+static int proto_ripng = -1;
+static int hf_ripng_cmd = -1;
+static int hf_ripng_version = -1;
+static int hf_ripng_reserved = -1;
+
+static int hf_ripng_rte = -1;
+static int hf_ripng_rte_ipv6_prefix = -1;
+static int hf_ripng_rte_route_tag = -1;
+static int hf_ripng_rte_prefix_length = -1;
+static int hf_ripng_rte_metric = -1;
+
+static gint ett_ripng = -1;
+static gint ett_ripng_rte = -1;
+
+#define UDP_PORT_RIPNG  521
+
+#define RIP6_REQUEST    1
+#define RIP6_RESPONSE   2
+
+static const value_string cmdvals[] = {
+    { RIP6_REQUEST,  "Request" },
+    { RIP6_RESPONSE, "Response" },
+    { 0, NULL },
+};
+
+static int
+dissect_ripng(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) {
+    int offset = 0;
+    proto_tree *ripng_tree = NULL, *rte_tree = NULL;
+    proto_item *ti, *rte_ti;
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "RIPng");
+    col_add_fstr(pinfo->cinfo, COL_INFO," Command %s, Version %u",
+                 val_to_str(tvb_get_guint8(tvb, offset), cmdvals, "Unknown (%u)"),
+                 tvb_get_guint8(tvb, offset +1));
+
+    if (tree) {
+        ti = proto_tree_add_item(tree, proto_ripng, tvb, offset, -1, ENC_NA);
+        ripng_tree = proto_item_add_subtree(ti, ett_ripng);
+
+        /* Command */
+        proto_tree_add_item(ripng_tree, hf_ripng_cmd, tvb, offset, 1, ENC_BIG_ENDIAN);
+        offset += 1;
+
+        /* Version */
+        proto_tree_add_item(ripng_tree, hf_ripng_version, tvb, offset, 1, ENC_BIG_ENDIAN);
+        offset += 1;
+
+        /* Reserved */
+        proto_tree_add_item(ripng_tree, hf_ripng_reserved, tvb, offset, 2, ENC_NA);
+        offset += 2;
+
+        /* Route Table Entry */
+        while (tvb_reported_length_remaining(tvb, offset) > 0) {
+
+            rte_ti = proto_tree_add_item(ripng_tree, hf_ripng_rte, tvb, offset, 16 + 2 + 1 + 1, ENC_NA);
+            rte_tree = proto_item_add_subtree(rte_ti, ett_ripng_rte);
+
+            /* IPv6 Prefix */
+            proto_tree_add_item(rte_tree, hf_ripng_rte_ipv6_prefix, tvb, offset, 16, ENC_NA);
+            proto_item_append_text(rte_ti, ": IPv6 Prefix: %s", tvb_ip6_to_str(pinfo->pool, tvb, offset));
+            offset += 16;
+
+            /* Route Tag */
+            proto_tree_add_item(rte_tree, hf_ripng_rte_route_tag, tvb, offset, 2, ENC_BIG_ENDIAN);
+            offset += 2;
+
+            /* Prefix Length */
+            proto_tree_add_item(rte_tree, hf_ripng_rte_prefix_length, tvb, offset, 1, ENC_BIG_ENDIAN);
+            proto_item_append_text(rte_ti, "/%u", tvb_get_guint8(tvb, offset));
+            offset += 1;
+
+            /* Metric */
+            proto_tree_add_item(rte_tree, hf_ripng_rte_metric, tvb, offset, 1, ENC_BIG_ENDIAN);
+            proto_item_append_text(rte_ti, " Metric: %u", tvb_get_guint8(tvb, offset));
+            offset += 1;
+        }
+    }
+    return tvb_captured_length(tvb);
+}
+
+void
+proto_register_ripng(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_ripng_cmd,
+          { "Command",          "ripng.cmd",
+            FT_UINT8, BASE_DEC, VALS(cmdvals), 0x0,
+            "Used to specify the purpose of this message", HFILL }},
+        { &hf_ripng_version,
+          { "Version",          "ripng.version",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            "Version of RIPng", HFILL }},
+        { &hf_ripng_reserved,
+          { "Reserved",         "ripng.reserved",
+            FT_BYTES, BASE_NONE, NULL, 0x0,
+            "Must be Zero", HFILL }},
+        { &hf_ripng_rte,
+          { "Route Table Entry",                "ripng.rte",
+            FT_NONE, BASE_NONE, NULL, 0x0,
+            NULL, HFILL }},
+        { &hf_ripng_rte_ipv6_prefix,
+          { "IPv6 Prefix",              "ripng.rte.ipv6_prefix",
+            FT_IPv6, BASE_NONE, NULL, 0x0,
+            "Destination", HFILL }},
+        { &hf_ripng_rte_route_tag,
+          { "Route Tag",                "ripng.rte.route_tag",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            "Provides a method of separating internal RIPng routes (routes for networks within the RIPng routing domain) from external RIPng routes, which may have been imported from an EGP or another IGP", HFILL }},
+
+        { &hf_ripng_rte_prefix_length,
+          { "Prefix Length",            "ripng.rte.prefix_length",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            "The length in bits of the significant part of the prefix starting from the left of the prefix", HFILL }},
+
+        { &hf_ripng_rte_metric,
+          { "Metric",           "ripng.rte.metric",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            "The current metric for the destination; the value 16 (infinity) indicates that the destination is not reachable", HFILL }},
+    };
+
+    static gint *ett[] = {
+        &ett_ripng,
+        &ett_ripng_rte,
+    };
+
+    proto_ripng = proto_register_protocol("RIPng", "RIPng", "ripng");
+    proto_register_field_array(proto_ripng, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    ripng_handle = register_dissector("ripng", dissect_ripng, proto_ripng);
+}
+
+void
+proto_reg_handoff_ripng(void)
+{
+    dissector_add_uint_with_preference("udp.port", UDP_PORT_RIPNG, ripng_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:
+ */