Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 211 insertions, 0 deletions

diff --git a/epan/dissectors/packet-xyplex.c b/epan/dissectors/packet-xyplex.c
new file mode 100644
index 00000000..6c9b5113
--- /dev/null
+++ b/epan/dissectors/packet-xyplex.c
@@ -0,0 +1,211 @@
+/* packet-xyplex.c
+ * Routines for xyplex packet dissection
+ *
+ * Copyright 2002 Randy McEoin <rmceoin@pe.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * Copied from packet-tftp.c
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/conversation.h>
+
+void proto_register_xyplex(void);
+void proto_reg_handoff_xyplex(void);
+
+static int proto_xyplex = -1;
+static int hf_xyplex_type = -1;
+static int hf_xyplex_pad = -1;
+static int hf_xyplex_server_port = -1;
+static int hf_xyplex_return_port = -1;
+static int hf_xyplex_reserved = -1;
+static int hf_xyplex_reply = -1;
+static int hf_xyplex_data = -1;
+
+static gint ett_xyplex = -1;
+
+static dissector_handle_t xyplex_handle;
+
+#define UDP_PORT_XYPLEX    173
+
+#define XYPLEX_REG_OK           0x00
+#define XYPLEX_REG_QUEFULL      0x05
+
+static const value_string xyplex_reg_vals[] = {
+  { XYPLEX_REG_OK,      "OK" },
+  { XYPLEX_REG_QUEFULL, "Queue Full" },
+  { 0,          NULL }
+};
+
+static int
+dissect_xyplex(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
+{
+  proto_tree     *xyplex_tree;
+  proto_item     *ti;
+  conversation_t *conversation;
+  gint            offset = 0;
+
+  guint8  prototype;
+  guint8  padding;
+  guint16 server_port;
+  guint16 return_port;
+  guint16 reserved;
+  guint16 reply;
+
+  col_set_str(pinfo->cinfo, COL_PROTOCOL, "XYPLEX");
+
+  ti = proto_tree_add_item(tree, proto_xyplex, tvb, offset, -1, ENC_NA);
+  xyplex_tree = proto_item_add_subtree(ti, ett_xyplex);
+
+  if (pinfo->destport == UDP_PORT_XYPLEX) {
+    /* This is a registration request from a Unix server
+     * to the Xyplex server.  The server_port indicates
+     * which Xyplex serial port is desired.  The
+     * return_port tells the Xyplex server what TCP port
+     * to open to the Unix server.
+     */
+    prototype = tvb_get_guint8(tvb, offset);
+    padding = tvb_get_guint8(tvb, offset+1);
+    server_port = tvb_get_ntohs(tvb, offset+2);
+    return_port = tvb_get_ntohs(tvb, offset+4);
+    reserved = tvb_get_ntohs(tvb, offset+6);
+    col_add_fstr(pinfo->cinfo, COL_INFO,
+                 "Registration Request: %d Return: %d",
+                 server_port, return_port);
+
+    if (tree) {
+      proto_tree_add_uint(xyplex_tree, hf_xyplex_type, tvb,
+                          offset, 1, prototype);
+      proto_tree_add_uint(xyplex_tree, hf_xyplex_pad, tvb,
+                          offset+1, 1, padding);
+      proto_tree_add_uint(xyplex_tree, hf_xyplex_server_port, tvb,
+                          offset+2, 2, server_port);
+      proto_tree_add_uint(xyplex_tree, hf_xyplex_return_port, tvb,
+                          offset+4, 2, return_port);
+      proto_tree_add_uint(xyplex_tree, hf_xyplex_reserved, tvb,
+                          offset+6, 2, reserved);
+    }
+    offset += 8;
+
+    /* Look for all future TCP conversations between the
+     * requesting server and the Xyplex host using the
+     * return_port.
+     */
+    conversation = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst,
+                                     CONVERSATION_TCP, return_port, 0, NO_PORT_B);
+    if (conversation == NULL) {
+      conversation = conversation_new(pinfo->num, &pinfo->src, &pinfo->dst,
+                                      CONVERSATION_TCP, return_port, 0, NO_PORT2);
+      conversation_set_dissector(conversation, xyplex_handle);
+    }
+    return offset;
+  }
+
+  if (pinfo->srcport == UDP_PORT_XYPLEX) {
+    prototype = tvb_get_guint8(tvb, offset);
+    padding = tvb_get_guint8(tvb, offset+1);
+    reply = tvb_get_ntohs(tvb, offset+2);
+    col_add_fstr(pinfo->cinfo, COL_INFO, "Registration Reply: %s",
+                 val_to_str(reply, xyplex_reg_vals, "Unknown (0x%02x)"));
+
+    if (tree) {
+      proto_tree_add_uint(xyplex_tree, hf_xyplex_type, tvb,
+                          offset, 1, prototype);
+      proto_tree_add_uint(xyplex_tree, hf_xyplex_pad, tvb,
+                          offset+1, 1, padding);
+      proto_tree_add_uint(xyplex_tree, hf_xyplex_reply, tvb,
+                          offset+2, 2, reply);
+    }
+    offset += 4;
+    return offset;
+  }
+
+  /*
+   * This must be the TCP data stream.  This will just be
+   * the raw data being transferred from the remote server
+   * and the Xyplex serial port.
+   */
+  col_add_fstr(pinfo->cinfo, COL_INFO, "%d > %d Data",
+               pinfo->srcport, pinfo->destport);
+
+  proto_tree_add_item(xyplex_tree, hf_xyplex_data, tvb, offset, -1, ENC_NA);
+
+  return tvb_reported_length_remaining(tvb, offset);
+}
+
+
+void
+proto_register_xyplex(void)
+{
+  static hf_register_info hf[] = {
+    { &hf_xyplex_type,
+      { "Type",       "xyplex.type",
+        FT_UINT8, BASE_DEC, NULL, 0x0,
+        "Protocol type", HFILL }},
+
+    { &hf_xyplex_pad,
+      { "Pad",        "xyplex.pad",
+        FT_UINT8, BASE_DEC, NULL, 0x0,
+        "Padding", HFILL }},
+
+    { &hf_xyplex_server_port,
+      { "Server Port",        "xyplex.server_port",
+        FT_UINT16, BASE_DEC, NULL, 0x0,
+        NULL, HFILL }},
+
+    { &hf_xyplex_return_port,
+      { "Return Port",   "xyplex.return_port",
+        FT_UINT16, BASE_DEC, NULL, 0x0,
+        NULL, HFILL }},
+
+    { &hf_xyplex_reserved,
+      { "Reserved field",  "xyplex.reserved",
+        FT_UINT16, BASE_DEC, NULL, 0x0,
+        NULL, HFILL }},
+
+    { &hf_xyplex_reply,
+      { "Registration Reply",  "xyplex.reply",
+        FT_UINT16, BASE_DEC, VALS(xyplex_reg_vals), 0x0,
+        NULL, HFILL }},
+
+    { &hf_xyplex_data,
+      { "Data",  "xyplex.data",
+        FT_BYTES, BASE_NONE, NULL, 0x0,
+        NULL, HFILL }},
+
+  };
+  static gint *ett[] = {
+    &ett_xyplex,
+  };
+
+  proto_xyplex = proto_register_protocol("Xyplex", "XYPLEX", "xyplex");
+  proto_register_field_array(proto_xyplex, hf, array_length(hf));
+  proto_register_subtree_array(ett, array_length(ett));
+  xyplex_handle = register_dissector("xyplex", dissect_xyplex, proto_xyplex);
+}
+
+void
+proto_reg_handoff_xyplex(void)
+{
+  dissector_add_uint_with_preference("udp.port", UDP_PORT_XYPLEX, xyplex_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:
+ */