plugins/epan/wimax/msg_clk_cmp.c

   1 /* msg_clk_cmp.c
   2  * WiMax MAC Management CLK_CMP Message decoders
   3  *
   4  * Copyright (c) 2007 by Intel Corporation.
   5  *
   6  * Author: Lu Pan <lu.pan@intel.com>
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1999 Gerald Combs
  11  *
  12  * SPDX-License-Identifier: GPL-2.0-or-later
  13  */
  14
  15 /* Include files */
  16
  17 #include "config.h"
  18
  19 #include <epan/packet.h>
  20 #include "wimax_mac.h"
  21
  22 void proto_register_mac_mgmt_msg_clk_cmp(void);
  23 void proto_reg_handoff_mac_mgmt_msg_clk_cmp(void);
  24
  25 static dissector_handle_t clk_cmp_handle;
  26
  27 static int proto_mac_mgmt_msg_clk_cmp_decoder;
  28
  29 static int ett_mac_mgmt_msg_clk_cmp_decoder;
  30
  31 /* CLK_CMP fields */
  32 static int hf_clk_cmp_clock_count;
  33 static int hf_clk_cmp_clock_id;
  34 static int hf_clk_cmp_seq_number;
  35 static int hf_clk_cmp_comparison_value;
  36 /* static int hf_clk_cmp_invalid_tlv; */
  37
  38
  39 /* Decode CLK_CMP messages. */
  40 static int dissect_mac_mgmt_msg_clk_cmp_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
  41 {
  42         unsigned offset = 0;
  43         unsigned i;
  44         unsigned clock_count;
  45         proto_item *clk_cmp_item;
  46         proto_tree *clk_cmp_tree;
  47
  48         {       /* we are being asked for details */
  49                 /* display MAC payload type CLK_CMP */
  50                 clk_cmp_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_clk_cmp_decoder, tvb, offset, -1, "Clock Comparison (CLK-CMP)");
  51                 /* add MAC CLK_CMP subtree */
  52                 clk_cmp_tree = proto_item_add_subtree(clk_cmp_item, ett_mac_mgmt_msg_clk_cmp_decoder);
  53                 /* get the clock count */
  54                 clock_count = tvb_get_uint8(tvb, offset);
  55                 /* display the clock count */
  56                 proto_tree_add_item(clk_cmp_tree, hf_clk_cmp_clock_count, tvb, offset, 1, ENC_BIG_ENDIAN);
  57                 /* set the offset for clock comparison */
  58                 offset++;
  59                 for (i = 0; i < clock_count; i++ )
  60                 {       /* display the Clock ID */
  61                         proto_tree_add_item(clk_cmp_tree, hf_clk_cmp_clock_id, tvb, offset++, 1, ENC_BIG_ENDIAN);
  62                         /* display the sequence number */
  63                         proto_tree_add_item(clk_cmp_tree, hf_clk_cmp_seq_number, tvb, offset++, 1, ENC_BIG_ENDIAN);
  64                         /* display the comparison value */
  65                         proto_tree_add_item(clk_cmp_tree, hf_clk_cmp_comparison_value, tvb, offset++, 1, ENC_BIG_ENDIAN);
  66                 }
  67         }
  68         return tvb_captured_length(tvb);
  69 }
  70
  71 /* Register Wimax Mac Payload Protocol and Dissector */
  72 void proto_register_mac_mgmt_msg_clk_cmp(void)
  73 {
  74         /* CLK_CMP fields display */
  75         static hf_register_info hf_clk_cmp[] =
  76         {
  77                 {
  78                         &hf_clk_cmp_clock_count,
  79                         {
  80                                 "Clock Count", "wmx.clk_cmp.clock_count",
  81                                 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
  82                         }
  83                 },
  84                 {
  85                         &hf_clk_cmp_clock_id,
  86                         {
  87                                 "Clock ID", "wmx.clk_cmp.clock_id",
  88                                 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
  89                         }
  90                 },
  91                 {
  92                         &hf_clk_cmp_comparison_value,
  93                         {
  94                                 "Comparison Value", "wmx.clk_cmp.comparison_value",
  95                                 FT_INT8, BASE_DEC, NULL, 0x0, NULL, HFILL
  96                         }
  97                 },
  98 #if 0
  99                 {
 100                         &hf_clk_cmp_invalid_tlv,
 101                         {
 102                                 "Invalid TLV", "wmx.clk_cmp.invalid_tlv",
 103                                 FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
 104                         }
 105                 },
 106 #endif
 107                 {
 108                         &hf_clk_cmp_seq_number,
 109                         {
 110                                 "Sequence Number", "wmx.clk_cmp.seq_number",
 111                                 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
 112                         }
 113                 }
 114         };
 115
 116         /* Setup protocol subtree array */
 117         static int *ett[] =
 118                 {
 119                         &ett_mac_mgmt_msg_clk_cmp_decoder,
 120                 };
 121
 122         proto_mac_mgmt_msg_clk_cmp_decoder = proto_register_protocol (
 123                 "WiMax CLK-CMP Message", /* name       */
 124                 "WiMax CLK-CMP (clk)",   /* short name */
 125                 "wmx.clk"                /* abbrev     */
 126                 );
 127
 128         proto_register_field_array(proto_mac_mgmt_msg_clk_cmp_decoder, hf_clk_cmp, array_length(hf_clk_cmp));
 129         proto_register_subtree_array(ett, array_length(ett));
 130         clk_cmp_handle = register_dissector("mac_mgmt_msg_clk_cmp_handler", dissect_mac_mgmt_msg_clk_cmp_decoder, proto_mac_mgmt_msg_clk_cmp_decoder);
 131 }
 132
 133 void
 134 proto_reg_handoff_mac_mgmt_msg_clk_cmp(void)
 135 {
 136         dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_CLK_CMP, clk_cmp_handle);
 137 }
 138
 139 /*
 140  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 141  *
 142  * Local variables:
 143  * c-basic-offset: 8
 144  * tab-width: 8
 145  * indent-tabs-mode: t
 146  * End:
 147  *
 148  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 149  * :indentSize=8:tabSize=8:noTabs=false:
 150  */