From mtwire via https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6060

New dissectors: (UA) Universal Alcatel Protocol and transport UAUDP

From me :
* Prefer proto_tree_add_item (when is possible)
* Use 4-space indenting
* Add Modeline information
* Fix Clang Warning

svn path=/trunk/; revision=39167

1 files changed, 237 insertions, 0 deletions

diff --git a/epan/dissectors/packet-uaudp.c b/epan/dissectors/packet-uaudp.c
new file mode 100644
index 0000000000..c1cc830769
--- /dev/null
+++ b/epan/dissectors/packet-uaudp.c
@@ -0,0 +1,237 @@
+/* packet-uaudp.c
+* Routines for UA/UDP (Universal Alcatel UDP) packet dissection.
+* Copyright 2011
+*
+* $Id$
+*
+* Wireshark - Network traffic analyzer
+* By Gerald Combs <gerald@wireshark.org>
+* Copyright 1998 Gerald Combs
+*
+* Copied from WHATEVER_FILE_YOU_USED (where "WHATEVER_FILE_YOU_USED"
+* is a dissector file; if you just copied this from README.developer,
+* don't bother with the "Copied from" - you don't even need to put
+* in a "Copied from" if you copied an existing dissector, especially
+* if the bulk of the code in the new dissector is your code)
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version 2
+* of the License, or (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+
+#include <epan/packet.h>
+#include <epan/prefs.h>
+
+/*
+* Here are the global variables associated with
+* the various user definable characteristics of the dissection
+*/
+
+static range_t *global_uaudp_port_range;
+static dissector_handle_t uaudp_handle;
+
+#define UAUDP_PORT_RANGE "5001, 32512"
+
+
+/* Define the UAUDP proto */
+static int proto_uaudp = -1;
+static dissector_table_t uaudp_dissector_table;
+
+/* Define many header fields for UAUDP */
+static int hf_uaudp_opcode = -1;
+static int hf_uaudp_expected = -1;
+static int hf_uaudp_send = -1;
+
+/*
+* Define the trees for UAUDP
+* We need one tree for UAUDP itself and one for the pn-rt data status subtree
+*/
+static int ett_uaudp_header = -1;
+
+/**
+* Opcode
+*/
+static const value_string szUaOpcode[] =
+{
+    { 0, "Connect" },
+    { 1, "Connect ACK" },
+    { 2, "Release" },
+    { 3, "Release ACK" },
+    { 4, "Keepalive" },
+    { 5, "Keepalive ACK" },
+    { 6, "NACK" },
+    { 7, "Data" },
+    { 0, NULL }
+};
+
+/*
+* dissect_uaudp - The dissector for the UA/UDP protocol
+*/
+static int dissect_uaudp(tvbuff_t *pTvb, packet_info *pInfo, proto_tree *pTree)
+{
+    gint nLen;
+    guint8 u8Opcode;
+    proto_item *pUAUDP, *pHeaderSubTree;
+
+    /* PROTOCOL column */
+    if(check_col(pInfo->cinfo, COL_PROTOCOL))
+        col_set_str(pInfo->cinfo, COL_PROTOCOL, "UAUDP");
+
+    nLen = tvb_length(pTvb);
+    u8Opcode = tvb_get_guint8(pTvb, 0);
+
+    /* INFO column */
+    if(check_col(pInfo->cinfo, COL_INFO))
+        col_set_str(pInfo->cinfo, COL_INFO, val_to_str(u8Opcode, szUaOpcode, "Unknown"));
+
+    if(pTree)
+    {
+        /* opcode "UA/UDP Protocol, ..." */
+        pUAUDP = proto_tree_add_item(pTree, proto_uaudp, pTvb, 0, -1, ENC_BIG_ENDIAN);
+        proto_item_append_text(pUAUDP, ", %s (%d)", val_to_str(u8Opcode, szUaOpcode, "Unknown"), u8Opcode);
+
+        pHeaderSubTree = proto_item_add_subtree(pUAUDP, ett_uaudp_header);
+        proto_tree_add_item(pHeaderSubTree, hf_uaudp_opcode, pTvb, 0, 1, ENC_BIG_ENDIAN);
+
+        if(u8Opcode == 7)
+        {
+            int iOffs = 1;
+
+            /* Sequence Number (expected) */
+            proto_tree_add_item(pHeaderSubTree, hf_uaudp_expected, pTvb, iOffs, 2, ENC_BIG_ENDIAN);
+            iOffs += 2;
+
+            /* Sequence Number (sent) */
+            proto_tree_add_item(pHeaderSubTree, hf_uaudp_send, pTvb, iOffs, 2, ENC_BIG_ENDIAN);
+            iOffs += 2;
+
+            /* Create the tvbuffer for the next dissector */
+            if(nLen > iOffs)
+            {
+                tvbuff_t *pTvbNext = tvb_new_subset(pTvb, iOffs, -1, -1);
+                if(dissector_try_uint(uaudp_dissector_table, 7, pTvbNext, pInfo, pTree))
+                    iOffs = nLen;
+                return iOffs;
+            }
+            else
+            {
+                if(check_col(pInfo->cinfo, COL_INFO))
+                    col_append_str(pInfo->cinfo, COL_INFO, " ACK");
+            }
+        }
+    }
+    return nLen;
+}
+
+/* The registration hand-off routine is called at startup */
+static void range_delete_callback(guint32 port)
+{
+    dissector_delete_uint("udp.port", port, uaudp_handle);
+}
+
+static void range_add_callback (guint32 port)
+{
+    dissector_add_uint("udp.port", port, uaudp_handle);
+}
+
+void proto_reg_handoff_uaudp(void)
+{
+    static range_t *uaudp_port_range;
+    static gboolean uaudp_initialized = FALSE;
+
+    if (!uaudp_initialized)
+    {
+        uaudp_handle = find_dissector("uaudp");
+        uaudp_initialized = TRUE;
+    }
+    else
+    {
+        range_foreach(uaudp_port_range, range_delete_callback);
+        g_free(uaudp_port_range);
+    }
+
+    uaudp_port_range = range_copy(global_uaudp_port_range);
+    range_foreach(uaudp_port_range, range_add_callback);
+}
+
+/* Register all the bits needed by the filtering engine */
+void proto_register_uaudp(void)
+{
+    static hf_register_info hf[] =
+    {
+        { &hf_uaudp_opcode,
+            { "Opcode", "uaudp.opcode",
+                FT_UINT8, BASE_DEC, VALS(szUaOpcode), 0x0,
+                "UA/UDP Opcode", HFILL }
+        },
+        { &hf_uaudp_expected,
+            { "Sequence Number (expected)", "uaudp.expected",
+                FT_UINT16, BASE_DEC, NULL, 0x0,
+                NULL, HFILL }
+        },
+        { &hf_uaudp_send,
+            { "Sequence Number (sent)", "uaudp.sent",
+                FT_UINT16, BASE_DEC, NULL, 0x0,
+                NULL, HFILL }
+        }
+    };
+    static gint *ett[] =
+    {
+        &ett_uaudp_header,
+    };
+
+    module_t* uaudp_module;
+
+    proto_uaudp = proto_register_protocol("Universal Alcatel UDP Protocol", "UAUDP", "uaudp");
+
+    proto_register_field_array(proto_uaudp, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    new_register_dissector("uaudp", dissect_uaudp, proto_uaudp);
+
+    /* Register our configuration options */
+    range_convert_str(&global_uaudp_port_range, UAUDP_PORT_RANGE, MAX_UDP_PORT);
+
+    uaudp_module = prefs_register_protocol(proto_uaudp, proto_reg_handoff_uaudp);
+    prefs_register_range_preference(uaudp_module, "udp_ports",
+        "UAUDP port numbers",
+        "Port numbers used for UAUDP traffic "
+        "(default " UAUDP_PORT_RANGE ")",
+        &global_uaudp_port_range, MAX_UDP_PORT);
+
+    uaudp_dissector_table = register_dissector_table("uaudp.opcode", "UA/UDP Opcode", FT_UINT8, BASE_DEC);
+}
+/*
+* Editor modelines - http://www.wireshark.org/tools/modelines.html
+*
+* Local variables:
+* c-basic-offset: 4
+* tab-width: 8
+* indent-tabs-mode: nil
+* End:
+*
+* ex: set shiftwidth=4 tabstop=8 expandtab:
+* :indentSize=4:tabSize=8:noTabs=true:
+*/