From e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 10 Apr 2024 22:34:10 +0200
Subject: Adding upstream version 4.2.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 epan/dissectors/packet-etherip.c | 131 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 epan/dissectors/packet-etherip.c

(limited to 'epan/dissectors/packet-etherip.c')

diff --git a/epan/dissectors/packet-etherip.c b/epan/dissectors/packet-etherip.c
new file mode 100644
index 00000000..94f169cf
--- /dev/null
+++ b/epan/dissectors/packet-etherip.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2003 Markus Friedl.  All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/ipproto.h>
+#include <epan/expert.h>
+
+void proto_register_etherip(void);
+void proto_reg_handoff_etherip(void);
+
+static int proto_etherip = -1;
+static int hf_etherip_ver = -1;
+static int hf_etherip_reserved = -1;
+
+static gint ett_etherip = -1;
+
+static expert_field ei_etherip_ver_3 = EI_INIT;
+static expert_field ei_etherip_reserved_0 = EI_INIT;
+
+static dissector_handle_t eth_withoutfcs_handle;
+static dissector_handle_t etherip_handle;
+
+/*
+ * RFC 3378: EtherIP: Tunneling Ethernet Frames in IP Datagrams
+ *
+ *      Bits 0-3:  Protocol version
+ *      Bits 4-15: Reserved for future use
+ */
+
+#define ETHERIP_VERS_MASK    0xF000
+#define ETHERIP_RESERVE_MASK 0x0FFF
+
+
+static int
+dissect_etherip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+  tvbuff_t *next_tvb;
+  proto_tree *etherip_tree;
+  proto_item *ti;
+  guint16 field, version;
+
+  col_set_str(pinfo->cinfo, COL_PROTOCOL, "ETHERIP");
+
+  field = tvb_get_ntohs(tvb, 0);
+  version = (field & ETHERIP_VERS_MASK) >> 12;
+
+  if (tree) {
+    ti = proto_tree_add_protocol_format(tree, proto_etherip, tvb, 0,
+             2,
+             "EtherIP, Version %d",
+             version
+             );
+    etherip_tree = proto_item_add_subtree(ti, ett_etherip);
+
+    ti = proto_tree_add_item(etherip_tree, hf_etherip_ver, tvb,
+             0, 2, ENC_BIG_ENDIAN);
+    if (version != 3) {
+      expert_add_info(pinfo, ti, &ei_etherip_ver_3);
+    }
+
+    ti = proto_tree_add_item(etherip_tree, hf_etherip_reserved, tvb,
+             0, 2, ENC_BIG_ENDIAN);
+    if ((field & ETHERIP_RESERVE_MASK) != 0) {
+      expert_add_info(pinfo, ti, &ei_etherip_reserved_0);
+    }
+  }
+
+  /* Set the tvbuff for the payload after the header */
+  next_tvb = tvb_new_subset_remaining(tvb, 2);
+
+  call_dissector(eth_withoutfcs_handle, next_tvb, pinfo, tree);
+  return tvb_captured_length(tvb);
+}
+
+void
+proto_register_etherip(void)
+{
+  static hf_register_info hf_etherip[] = {
+    { &hf_etherip_ver,
+      { "Version", "etherip.ver", FT_UINT16, BASE_DEC, NULL, ETHERIP_VERS_MASK,
+        NULL, HFILL }},
+    { &hf_etherip_reserved,
+      { "Reserved", "etherip.reserved", FT_UINT16, BASE_HEX, NULL, ETHERIP_RESERVE_MASK,
+        "Reserved (must be 0)", HFILL }},
+  };
+
+  static gint *ett[] = {
+    &ett_etherip,
+  };
+
+  static ei_register_info ei[] = {
+     { &ei_etherip_ver_3, { "etherip.ver.not3", PI_PROTOCOL, PI_WARN, "Version must be 3", EXPFILL }},
+     { &ei_etherip_reserved_0, { "etherip.reserved.not0", PI_PROTOCOL, PI_WARN, "Reserved field must be 0", EXPFILL }},
+  };
+
+  expert_module_t* expert_etherip;
+
+  proto_etherip = proto_register_protocol("Ethernet over IP",
+                                          "ETHERIP", "etherip");
+  proto_register_field_array(proto_etherip, hf_etherip, array_length(hf_etherip));
+  proto_register_subtree_array(ett, array_length(ett));
+  expert_etherip = expert_register_protocol(proto_etherip);
+  expert_register_field_array(expert_etherip, ei, array_length(ei));
+
+  etherip_handle = register_dissector("etherip", dissect_etherip, proto_etherip);
+}
+
+void
+proto_reg_handoff_etherip(void)
+{
+  eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_etherip);
+  dissector_add_uint("ip.proto", IP_PROTO_ETHERIP, etherip_handle);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local Variables:
+ * c-basic-offset: 2
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=2 tabstop=8 expandtab:
+ * :indentSize=2:tabSize=8:noTabs=true:
+ */
-- 
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