Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 360 insertions, 0 deletions

diff --git a/epan/dissectors/packet-tdmop.c b/epan/dissectors/packet-tdmop.c
new file mode 100644
index 00000000..34c9fb1c
--- /dev/null
+++ b/epan/dissectors/packet-tdmop.c
@@ -0,0 +1,360 @@
+/* packet-tdmop.c
+ * Routines for TDM over Packet network disassembly
+ * Copyright 2015, Andrew Chernyh <andew.chernyh@gmail.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+/*
+ * TDMoP protocol is proprietary protocol developed by "NSC Communication Siberia Ltd."
+ */
+#include "config.h"
+#include <epan/packet.h>
+#include <epan/conversation.h>
+#include <epan/prefs.h>
+
+/*Using of ethertype 0x0808(assigned to Frame Realy ARP) was implemented in hardware, when ethertype was not assigned*/
+#define ETHERTYPE_TDMOP       0
+
+#define MAX_DCHANNEL_LEN      128
+
+void proto_register_tdmop(void);
+void proto_reg_handoff_tdmop(void);
+
+static dissector_handle_t tdmop_handle;
+
+static int proto_tdmop    = -1;
+static gint ett_tdmop     = -1;
+static gint ett_tdmop_channel    = -1;
+
+static int hf_tdmop_TransferID   = -1;
+static int hf_tdmop_DstCh        = -1;
+static int hf_tdmop_SrcCh        = -1;
+static int hf_tdmop_Flags        = -1;
+static int hf_tdmop_Flags_no_data        = -1;
+static int hf_tdmop_Flags_lost_request   = -1;
+static int hf_tdmop_Flags_remote_no_data = -1;
+static int hf_tdmop_Flags_compressed     = -1;
+static int hd_tdmop_SrcDst        = -1;
+static int hd_tdmop_SeqNum        = -1;
+static int hd_tdmop_LastRecv      = -1;
+static int hd_tdmop_Delay         = -1;
+static int hd_tdmop_Reserved      = -1;
+static int hf_tdmop_payload       = -1;
+static int hf_tdmop_Compression_mask    = -1;
+
+static dissector_handle_t lapd_handle    = NULL;
+
+static gint pref_tdmop_d_channel      = 16;
+static guint32 pref_tdmop_mask        = 0xFFFFFFFFUL;
+static guint32 pref_tdmop_ethertype   = ETHERTYPE_TDMOP;
+
+#define TDMOP_FLAG_NO_DATA (1<<3)
+#define TDMOP_FLAG_REMOTE_NO_DATA (1<<2)
+#define TDMOP_FLAG_COMPRESSED (1<<4)
+#define TDMOP_FLAG_LOST_REQUEST ((1<<3)|(0x02))
+
+static guint8 reverse_map[256]=
+{
+0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
+0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
+0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
+0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
+0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
+0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
+0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
+0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
+0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
+0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
+0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
+0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
+0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
+0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
+0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
+0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF
+};
+
+static int dissect_tdmop(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+    guint8    dchannel_data[MAX_DCHANNEL_LEN];
+    guint    dchannel_len;
+    guint8    flags;
+    gint offset;
+    proto_item    *ti;
+    proto_tree    *tdmop_tree;
+    guint32 dstch, srcch;
+    flags = tvb_get_guint8(tvb, 4);
+    offset = 0;
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "TDMoP");
+    col_clear(pinfo->cinfo, COL_INFO);
+    if (flags & TDMOP_FLAG_LOST_REQUEST)
+    {
+        col_add_fstr(pinfo->cinfo, COL_INFO, "Lost Request");
+    }
+
+    ti = proto_tree_add_item(tree, proto_tdmop, tvb, 0, -1, ENC_NA);
+    tdmop_tree = proto_item_add_subtree(ti, ett_tdmop);
+    /*path info*/
+    proto_tree_add_item(tdmop_tree, hf_tdmop_TransferID, tvb, offset, 4, ENC_LITTLE_ENDIAN);
+    offset += 2;
+    proto_tree_add_item_ret_uint(tdmop_tree, hf_tdmop_DstCh, tvb, offset, 1, ENC_LITTLE_ENDIAN, &dstch);
+    offset += 1;
+    proto_tree_add_item_ret_uint(tdmop_tree, hf_tdmop_SrcCh, tvb, offset, 1, ENC_LITTLE_ENDIAN, &srcch);
+    offset += 1;
+
+    /*conversation*/
+    conversation_set_conv_addr_port_endpoints(pinfo, &pinfo->src, &pinfo->dst, CONVERSATION_TDMOP, srcch, dstch);
+
+    /*flags*/
+    proto_tree_add_item(tdmop_tree, hf_tdmop_Flags, tvb, offset, 1, ENC_NA);
+    proto_tree_add_item(tdmop_tree, hf_tdmop_Flags_no_data, tvb, offset, 1, ENC_NA);
+    proto_tree_add_item(tdmop_tree, hf_tdmop_Flags_lost_request, tvb, offset, 1, ENC_NA);
+    proto_tree_add_item(tdmop_tree, hf_tdmop_Flags_remote_no_data, tvb, offset, 1, ENC_NA);
+    proto_tree_add_item(tdmop_tree, hf_tdmop_Flags_compressed, tvb, offset, 1, ENC_NA);
+    offset += 1;
+    /*sequence and delay info*/
+    proto_tree_add_item(tdmop_tree, hd_tdmop_SrcDst, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+    offset += 1;
+    proto_tree_add_item(tdmop_tree, hd_tdmop_SeqNum, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+    offset += 2;
+    proto_tree_add_item(tdmop_tree, hd_tdmop_LastRecv, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+    offset += 2;
+    proto_tree_add_item(tdmop_tree, hd_tdmop_Delay, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+    offset += 2;
+    proto_tree_add_item(tdmop_tree, hd_tdmop_Reserved, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+    offset += 2;
+    if ((flags & TDMOP_FLAG_NO_DATA)==0)
+    {
+        gint len;
+        gint blockid;
+        dchannel_len=0;
+        len=tvb_captured_length_remaining(tvb, 0);
+        proto_tree_add_item(tdmop_tree, hf_tdmop_payload, tvb, offset, -1, ENC_NA);
+        blockid=0;
+        /*demux TDM stream*/
+        while (offset<len)
+        {
+            proto_tree *currentblock = proto_tree_add_subtree_format(tdmop_tree, tvb, 0, 0, ett_tdmop_channel, 0, "Block %d", blockid);
+            guint32 mask;
+            gint i;
+            gint j;
+            blockid++;
+            mask = pref_tdmop_mask; /*default mask is for timeslots 1-32*/
+            if (flags&TDMOP_FLAG_COMPRESSED)
+            {
+                mask = tvb_get_letohl(tvb,offset);
+                mask = ((mask >> 16) & 0xFFFF)|((mask & 0xFFFF) << 16);
+                proto_tree_add_uint(currentblock, hf_tdmop_Compression_mask, tvb, offset, 4, mask);
+                offset+=4;
+            }
+            for (i=0; i<32; i++)
+            {
+                if (mask & (1UL<<i))
+                {
+                    proto_tree *subtree;
+                    tvbuff_t *cdata;
+                    subtree = proto_tree_add_subtree_format(currentblock, tvb, 0, 0, ett_tdmop_channel, 0, "Channel %d", i);
+                    cdata = tvb_new_subset_length(tvb, offset, 4);
+                    if (i==pref_tdmop_d_channel)
+                    {
+                        if (dchannel_len + 4 < MAX_DCHANNEL_LEN)
+                        {
+                            for (j = 0; j < 4; j++)
+                            {
+                                dchannel_data[dchannel_len+j]=reverse_map[tvb_get_guint8(cdata, j)];
+                            }
+                            dchannel_len += 4;
+                        }
+                    } else
+                    {
+                        call_data_dissector(cdata, pinfo, subtree);
+                    }
+                    offset += 4;
+                }
+            }
+        }
+        if (dchannel_len>0)
+        {
+            guint8 *buff = (guint8 *)wmem_memdup(pinfo->pool, dchannel_data, dchannel_len);
+            tvbuff_t *new_tvb;
+            new_tvb = tvb_new_child_real_data(tvb, buff, dchannel_len, dchannel_len);
+            call_dissector(lapd_handle, new_tvb, pinfo, tree);
+        }
+    }
+    return tvb_captured_length(tvb);
+}
+
+void proto_register_tdmop(void)
+{
+    module_t *tdmop_module;
+    static hf_register_info hf[] =
+    {
+        {
+            &hf_tdmop_TransferID,
+            {    "TDMoP Transfer ID", "tdmop.transferid",
+                FT_UINT32, BASE_HEX,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_DstCh,
+            {    "TDMoP Dst Ch", "tdmop.dstch",
+                FT_UINT8, BASE_DEC,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_SrcCh,
+            {    "TDMoP Src Ch", "tdmop.srcch",
+                FT_UINT8, BASE_DEC,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_Flags,
+            {    "TDMoP Flags", "tdmop.flags",
+                FT_UINT8, BASE_DEC,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_Flags_lost_request,
+            {    "TDMoP Lost Request Flag", "tdmop.flags.lostrequest",
+                FT_BOOLEAN, 8,
+                NULL, TDMOP_FLAG_LOST_REQUEST,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_Flags_no_data,
+            {    "TDMoP No data flag", "tdmop.flags.nodata",
+                FT_BOOLEAN, 8,
+                NULL, TDMOP_FLAG_NO_DATA,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_Flags_remote_no_data,
+            {    "TDMoP No data received from remote side flag", "tdmop.flags.remotenodata",
+                FT_BOOLEAN, 8,
+                NULL, TDMOP_FLAG_REMOTE_NO_DATA,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_Flags_compressed,
+            {    "TDMoP compressed framed", "tdmop.flags.compressed",
+                FT_BOOLEAN, 8,
+                NULL, TDMOP_FLAG_COMPRESSED,
+                NULL, HFILL}
+        },
+        {
+            &hd_tdmop_SrcDst,
+            {    "TDMoP Short SrcDst", "tdmop.srcdst",
+                FT_UINT8, BASE_HEX,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hd_tdmop_SeqNum,
+            {    "TDMoP Sequence number", "tdmop.seqnum",
+                FT_UINT16, BASE_DEC,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hd_tdmop_LastRecv,
+            {    "TDMoP Last Received number", "tdmop.recvnumber",
+                FT_UINT16, BASE_DEC,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hd_tdmop_Delay,
+            {    "TDMoP Delay", "tdmop.delay",
+                FT_UINT16, BASE_DEC,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hd_tdmop_Reserved,
+            {    "TDMoP Reserved", "tdmop.reserved",
+                FT_UINT16, BASE_DEC,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_payload,
+            {    "TDMoP Payload", "tdmop.payload",
+                FT_BYTES, BASE_NONE,
+                NULL, 0x0,
+                NULL, HFILL}
+        },
+        {
+            &hf_tdmop_Compression_mask,
+            {    "TDMoP Compression mask", "tdmop.cmask",
+                FT_UINT32, BASE_HEX,
+                NULL, 0x0,
+                NULL, HFILL}
+        }
+    };
+    static gint *ett[] = {
+        &ett_tdmop,
+        &ett_tdmop_channel
+    };
+    proto_tdmop = proto_register_protocol ("TDMoP protocol", "TDMoP", "tdmop");
+    proto_register_field_array(proto_tdmop, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+    tdmop_handle = register_dissector("tdmop", dissect_tdmop, proto_tdmop);
+    tdmop_module = prefs_register_protocol(proto_tdmop, proto_reg_handoff_tdmop);
+    prefs_register_uint_preference(tdmop_module, "d_channel",
+                    "TDMoP D-Channel",
+                    "The TDMoD channel that contains the D-Channel.",
+                    10, &pref_tdmop_d_channel);
+    prefs_register_uint_preference(tdmop_module, "ts_mask",
+                    "TDMoP default timeslot mask",
+                    "The bitmask of channels in uncompressed TDMoP frame",
+                    16, &pref_tdmop_mask);
+    prefs_register_uint_preference(tdmop_module, "ethertype",
+                    "Ethertype for TDMoP stream(Usually 0808)",
+                    "The ethertype assigned to TDMoP (without IP/UDP) stream",
+                    16, &pref_tdmop_ethertype);
+}
+
+void proto_reg_handoff_tdmop(void)
+{
+    static gboolean init = FALSE;
+    static guint32 current_tdmop_ethertype;
+    if (!init)
+    {
+        dissector_add_for_decode_as_with_preference("udp.port", tdmop_handle);
+
+        if (pref_tdmop_ethertype) {
+            dissector_add_uint("ethertype", pref_tdmop_ethertype, tdmop_handle);
+        }
+        lapd_handle = find_dissector_add_dependency("lapd-bitstream", proto_tdmop);
+        current_tdmop_ethertype = pref_tdmop_ethertype;
+        init = TRUE;
+    }
+    if (current_tdmop_ethertype != pref_tdmop_ethertype)
+    {
+        dissector_delete_uint("ethertype", current_tdmop_ethertype, tdmop_handle);
+        if (pref_tdmop_ethertype) {
+            dissector_add_uint("ethertype", pref_tdmop_ethertype, tdmop_handle);
+        }
+        current_tdmop_ethertype = pref_tdmop_ethertype;
+    }
+}
+
+/*
+ * 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:
+ */