Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 343 insertions, 0 deletions

diff --git a/epan/dissectors/packet-bmc.c b/epan/dissectors/packet-bmc.c
new file mode 100644
index 00000000..ea2c1952
--- /dev/null
+++ b/epan/dissectors/packet-bmc.c
@@ -0,0 +1,343 @@
+/* packet-bmc.c
+ * Routines for Broadcast/Multicast Control dissection
+ * Copyright 2011, Neil Piercy <Neil.Piercy@ipaccess.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <wsutil/bitswap.h>
+#include <epan/asn1.h> /* needed for packet-gsm_map.h */
+
+#include "packet-cell_broadcast.h"
+#include "packet-gsm_map.h"
+
+void proto_register_bmc(void);
+
+static int dissect_bmc_cbs_message     (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+static int dissect_bmc_schedule_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+static int dissect_bmc_cbs41_message   (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+
+static int proto_bmc = -1;
+static int hf_bmc_message_type = -1;
+static int hf_bmc_message_id = -1;
+static int hf_bmc_serial_number = -1;
+/* static int hf_bmc_data_coding_scheme = -1; */
+/* static int hf_bmc_cb_data = -1; */
+static int hf_bmc_offset_to_begin_ctch_bs_index = -1;
+static int hf_bmc_length_of_cbs_schedule_period = -1;
+static int hf_bmc_new_message_bitmap = -1;
+static int hf_bmc_message_description_type = -1;
+static int hf_bmc_offset_to_ctch_bs_index_of_first_transmission = -1;
+static int hf_bmc_broadcast_address = -1;
+static int hf_bmc_cb_data41 = -1;
+static int hf_bmc_future_extension_bitmap = -1;
+static int hf_bmc_length_of_serial_number_list = -1;
+static int hf_bmc_ctch_bs_index = -1;
+
+#define MESSAGE_TYPE_CBS_MESSAGE        1
+#define MESSAGE_TYPE_SCHEDULE_MESSAGE   2
+#define MESSAGE_TYPE_CBS41_MESSAGE      3
+
+static const value_string message_type_vals[] = {
+    {MESSAGE_TYPE_CBS_MESSAGE, "CBS Message"},
+    {MESSAGE_TYPE_SCHEDULE_MESSAGE, "Schedule Message"},
+    {MESSAGE_TYPE_CBS41_MESSAGE, "CBS41 Message"},
+    {0, NULL}
+};
+
+static const value_string message_description_type_vals[] = {
+    {0, "Repetition of new BMC CBS message within schedule period"},
+    {1, "New BMC CBS message (a BMC CBS message never previously sent)"},
+    {2, "Reading advised"},
+    {3, "Reading optional"},
+    {4, "Repetition of old BMC CBS message within schedule period"},
+    {5, "Old BMC CBS message (repetition of a BMC CBS message sent in a previous schedule period)"},
+    {6, "Schedule message"},
+    {7, "CBS41 message"},
+    {8, "no message"},
+    {0, NULL}
+};
+
+static gint ett_bmc = -1;
+static gint ett_bmc_message_description = -1;
+
+static int
+dissect_bmc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
+{
+    guint8      message_type;
+    guint8     *reversing_buffer;
+    gint        offset = 0;
+    gint        len;
+    proto_item *ti;
+    proto_tree *bmc_tree;
+    tvbuff_t   *bit_reversed_tvb;
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "BMC");
+    col_clear(pinfo->cinfo, COL_INFO);
+
+    ti = proto_tree_add_item(tree, proto_bmc, tvb, 0, -1, ENC_NA);
+    bmc_tree = proto_item_add_subtree(ti, ett_bmc);
+
+    /* Needs bit-reversing. Create a new buffer, copy the message to it and bit-reverse */
+    len = tvb_reported_length(tvb);
+    reversing_buffer = (guint8 *)tvb_memdup(pinfo->pool, tvb, offset, len);
+    bitswap_buf_inplace(reversing_buffer, len);
+
+    /* Make this new buffer part of the display and provide a way to dispose of it */
+    bit_reversed_tvb = tvb_new_child_real_data(tvb, reversing_buffer, len, len);
+    add_new_data_source(pinfo, bit_reversed_tvb, "Bit-reversed Data");
+
+    message_type = tvb_get_guint8(bit_reversed_tvb, offset);
+    proto_tree_add_item(bmc_tree, hf_bmc_message_type, bit_reversed_tvb, offset, 1, ENC_BIG_ENDIAN);
+    offset++;
+    col_add_str(pinfo->cinfo, COL_INFO, val_to_str(message_type, message_type_vals,"Reserved 0x%02x"));
+
+    switch (message_type) {
+        case MESSAGE_TYPE_CBS_MESSAGE:
+            offset = dissect_bmc_cbs_message(bit_reversed_tvb, pinfo, bmc_tree);
+            break;
+
+        case MESSAGE_TYPE_SCHEDULE_MESSAGE:
+            offset = dissect_bmc_schedule_message(bit_reversed_tvb, pinfo, bmc_tree);
+            break;
+
+        case MESSAGE_TYPE_CBS41_MESSAGE:
+            offset = dissect_bmc_cbs41_message(bit_reversed_tvb, pinfo, bmc_tree);
+            break;
+
+        default:
+            break;
+    }
+
+    return offset;
+}
+
+static int
+dissect_bmc_cbs_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+    tvbuff_t *cell_broadcast_tvb;
+    gint      offset = 1;
+
+    dissect_cbs_message_identifier(tvb, tree, offset);
+    offset += 2;
+
+    dissect_cbs_serial_number(tvb, tree, offset);
+    offset += 2;
+
+    dissect_cbs_data_coding_scheme(tvb, pinfo, tree, offset);
+    offset += 1;
+
+    cell_broadcast_tvb = tvb_new_subset_remaining(tvb, offset);
+    dissect_umts_cell_broadcast_message(cell_broadcast_tvb, pinfo, tree, NULL);
+    offset = tvb_reported_length(cell_broadcast_tvb);
+
+    return offset;
+}
+
+static int
+dissect_bmc_schedule_message(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
+{
+    gint        offset = 1, i, saved_offset;
+    guint8      new_message_bitmap_len;
+    guint8      length_of_cbs_schedule_period;
+    guint8      message_description_type;
+    guint8      future_extension_bitmap;
+    guint8      length_of_serial_number_list;
+    guint8      entry;
+    guint8      bit;
+    proto_tree *message_description_tree;
+    proto_item *ti;
+
+    proto_tree_add_item(tree, hf_bmc_offset_to_begin_ctch_bs_index, tvb, offset, 1, ENC_BIG_ENDIAN);
+    offset += 1;
+
+    length_of_cbs_schedule_period = tvb_get_guint8(tvb,offset);
+    proto_tree_add_item(tree, hf_bmc_length_of_cbs_schedule_period, tvb, offset, 1, ENC_BIG_ENDIAN);
+    offset += 1;
+
+    new_message_bitmap_len = length_of_cbs_schedule_period>>3;
+    if (length_of_cbs_schedule_period & 0x7)
+        new_message_bitmap_len += 1;
+
+    proto_tree_add_item(tree, hf_bmc_new_message_bitmap, tvb, offset, new_message_bitmap_len, ENC_NA);
+    offset += new_message_bitmap_len;
+
+    message_description_tree = proto_tree_add_subtree(tree, tvb, offset, 0,
+                    ett_bmc_message_description, &ti, "Message Description" );
+    saved_offset = offset;
+
+    bit=1;
+    for (i=0; i<new_message_bitmap_len; i++) {
+        for(; bit<=length_of_cbs_schedule_period; bit++) {
+            message_description_type = tvb_get_guint8(tvb,offset);
+            proto_tree_add_uint_format(message_description_tree, hf_bmc_message_description_type,
+                                       tvb, offset, 1, message_description_type,
+                                       "Message %d Message Description Type: %s (%d)",
+                                       bit,
+                                       val_to_str_const(message_description_type, message_description_type_vals,"Unknown"),
+                                       message_description_type);
+            offset += 1;
+
+            if ((message_description_type==1) || (message_description_type==5)) {
+                proto_tree_add_item(message_description_tree, hf_bmc_message_id, tvb, offset, 2, ENC_BIG_ENDIAN);
+                offset += 2;
+            }
+            else if ((message_description_type==0) || (message_description_type==4)) {
+                proto_tree_add_item(message_description_tree, hf_bmc_offset_to_ctch_bs_index_of_first_transmission,
+                                    tvb, offset, 1, ENC_BIG_ENDIAN);
+                offset += 1;
+            }
+        }
+    }
+    proto_item_set_len(ti, offset-saved_offset);
+
+    if (tvb_reported_length_remaining(tvb,offset)) {
+        future_extension_bitmap = tvb_get_guint8(tvb,offset);
+        proto_tree_add_item(tree, hf_bmc_future_extension_bitmap, tvb, offset, 1, ENC_BIG_ENDIAN);
+        offset += 1;
+        if (future_extension_bitmap & 0x01) {
+            length_of_serial_number_list = tvb_get_guint8(tvb,offset);
+            proto_tree_add_item(tree, hf_bmc_length_of_serial_number_list, tvb, offset, 1, ENC_BIG_ENDIAN);
+            offset += 1;
+
+            for (entry=0; entry<length_of_serial_number_list; entry++) {
+                proto_tree_add_item(tree, hf_bmc_serial_number, tvb, offset, 2, ENC_BIG_ENDIAN);
+                offset += 2;
+
+                proto_tree_add_item(tree, hf_bmc_ctch_bs_index, tvb, offset, 1, ENC_BIG_ENDIAN);
+                offset += 1;
+            }
+        }
+    }
+
+    return offset;
+}
+
+static int
+dissect_bmc_cbs41_message(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
+{
+    gint offset=1;
+
+    proto_tree_add_item(tree, hf_bmc_broadcast_address, tvb, offset, 5, ENC_NA);
+    offset += 5;
+
+    proto_tree_add_item(tree, hf_bmc_cb_data41, tvb, offset, tvb_reported_length_remaining(tvb,offset), ENC_NA);
+    offset = tvb_reported_length(tvb);
+
+    return offset;
+}
+
+void
+proto_register_bmc(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_bmc_message_type,
+            { "Message Type", "bmc.message_type",
+            FT_UINT8, BASE_DEC, VALS(message_type_vals), 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_message_id,
+            { "Message ID", "bmc.message_id",
+            FT_UINT16, BASE_HEX, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_serial_number,
+            { "Serial Number", "bmc.serial_number",
+            FT_UINT16, BASE_HEX, NULL, 0,
+            NULL, HFILL }
+        },
+#if 0
+        { &hf_bmc_data_coding_scheme,
+            { "Data Coding Scheme", "bmc.data_coding_scheme",
+            FT_UINT8, BASE_HEX, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_cb_data,
+            { "CB Data", "bmc.cb_data",
+            FT_BYTES, BASE_NONE, NULL, 0,
+            NULL, HFILL }
+        },
+#endif
+        { &hf_bmc_offset_to_begin_ctch_bs_index,
+            { "Offset to Begin CTCH Block Set Index", "bmc.offset_to_begin_ctch_bs_index",
+            FT_UINT8, BASE_DEC, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_length_of_cbs_schedule_period,
+            { "Length of CBS Schedule Period", "bmc.length_of_cbs_schedule_period",
+            FT_UINT8, BASE_DEC, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_new_message_bitmap,
+            { "New Message Bitmap", "bmc.new_message_bitmap",
+            FT_BYTES, BASE_NONE, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_message_description_type,
+            { "Message Description Type", "bmc.message_description_type",
+            FT_UINT8, BASE_DEC, VALS(message_description_type_vals), 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_offset_to_ctch_bs_index_of_first_transmission,
+            { "Offset to CTCH BS index of first transmission", "bmc.offset_to_ctch_bs_index_of_first_transmission",
+            FT_UINT8, BASE_DEC, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_broadcast_address,
+            { "Broadcast Address", "bmc.broadcast_address",
+            FT_BYTES, BASE_NONE, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_cb_data41,
+            { "CB Data41", "bmc.cb_data41",
+            FT_BYTES, BASE_NONE, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_future_extension_bitmap,
+            { "Future Extension Bitmap", "bmc.future_extension_bitmap",
+            FT_UINT8, BASE_DEC, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_length_of_serial_number_list,
+            { "Length of Serial Number List", "bmc.length_of_serial_number_list",
+            FT_UINT8, BASE_DEC, NULL, 0,
+            NULL, HFILL }
+        },
+        { &hf_bmc_ctch_bs_index,
+            { "CTCH BS Index", "bmc.ctch_bs_index",
+            FT_UINT8, BASE_DEC, NULL, 0,
+            NULL, HFILL }
+        }
+    };
+
+    static gint *ett[] = {
+        &ett_bmc,
+        &ett_bmc_message_description
+    };
+
+    proto_bmc = proto_register_protocol("Broadcast/Multicast Control", "BMC", "bmc");
+    register_dissector("bmc", dissect_bmc, proto_bmc);
+
+    proto_register_field_array(proto_bmc, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+}
+
+/*
+ * 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:
+ */