epan/dissectors/packet-calcappprotocol.c

   1 /* packet-calcappprotocol.c
   2  * Routines for the Calculation Application Protocol, a test application of the
   3  * RSPLIB RSerPool implementation
   4  * https://www.uni-due.de/~be0001/rserpool/
   5  *
   6  * Copyright 2006-2021 by Thomas Dreibholz <dreibh [AT] iem.uni-due.de>
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * Copied from README.developer
  13  *
  14  * SPDX-License-Identifier: GPL-2.0-or-later
  15  */
  16
  17 #include "config.h"
  18
  19 #include <epan/packet.h>
  20 #include <epan/sctpppids.h>
  21 #include <epan/stat_tap_ui.h>
  22 #include <wsutil/array.h>
  23
  24 void proto_register_calcappprotocol(void);
  25 void proto_reg_handoff_calcappprotocol(void);
  26
  27 static dissector_handle_t calcappprotocol_handle;
  28
  29 #define CALCAPPPROTOCOL_PAYLOAD_PROTOCOL_ID_LEGACY 0x29097603
  30
  31
  32 /* Initialize the protocol and registered fields */
  33 static int proto_calcappprotocol;
  34 static int tap_calcappprotocol   = -1;
  35 static int hf_message_type;
  36 static int hf_message_flags;
  37 static int hf_message_length;
  38 static int hf_message_jobid;
  39 static int hf_message_jobsize;
  40 static int hf_message_completed;
  41
  42 static uint64_t calcappprotocol_total_msgs;
  43 static uint64_t calcappprotocol_total_bytes;
  44
  45 /* Initialize the subtree pointers */
  46 static int ett_calcappprotocol;
  47
  48 /* Dissectors for messages. This is specific to CalcAppProtocol */
  49 #define MESSAGE_TYPE_LENGTH      1
  50 #define MESSAGE_FLAGS_LENGTH     1
  51 #define MESSAGE_LENGTH_LENGTH    2
  52 #define MESSAGE_JOBID_LENGTH     4
  53 #define MESSAGE_JOBSIZE_LENGTH   8
  54 #define MESSAGE_COMPLETED_LENGTH 8
  55
  56 #define MESSAGE_TYPE_OFFSET      0
  57 #define MESSAGE_FLAGS_OFFSET     (MESSAGE_TYPE_OFFSET    + MESSAGE_TYPE_LENGTH)
  58 #define MESSAGE_LENGTH_OFFSET    (MESSAGE_FLAGS_OFFSET   + MESSAGE_FLAGS_LENGTH)
  59 #define MESSAGE_JOBID_OFFSET     (MESSAGE_LENGTH_OFFSET  + MESSAGE_LENGTH_LENGTH)
  60 #define MESSAGE_JOBSIZE_OFFSET   (MESSAGE_JOBID_OFFSET   + MESSAGE_JOBID_OFFSET)
  61 #define MESSAGE_COMPLETED_OFFSET (MESSAGE_JOBSIZE_OFFSET + MESSAGE_JOBSIZE_OFFSET)
  62
  63
  64 #define CALCAPP_REQUEST_MESSAGE_TYPE       1
  65 #define CALCAPP_ACCEPT_MESSAGE_TYPE        2
  66 #define CALCAPP_REJECT_MESSAGE_TYPE        3
  67 #define CALCAPP_ABORT_MESSAGE_TYPE         4
  68 #define CALCAPP_COMPLETE_MESSAGE_TYPE      5
  69 #define CALCAPP_KEEPALIVE_MESSAGE_TYPE     6
  70 #define CALCAPP_KEEPALIVE_ACK_MESSAGE_TYPE 7
  71
  72
  73 static const value_string message_type_values[] = {
  74   { CALCAPP_REQUEST_MESSAGE_TYPE,        "CalcApp Request" },
  75   { CALCAPP_ACCEPT_MESSAGE_TYPE,         "CalcApp Accept" },
  76   { CALCAPP_REJECT_MESSAGE_TYPE,         "CalcApp Reject" },
  77   { CALCAPP_ABORT_MESSAGE_TYPE,          "CalcApp Abort" },
  78   { CALCAPP_COMPLETE_MESSAGE_TYPE,       "CalcApp Complete" },
  79   { CALCAPP_KEEPALIVE_MESSAGE_TYPE,      "CalcApp Keep-Alive" },
  80   { CALCAPP_KEEPALIVE_ACK_MESSAGE_TYPE,  "CalcApp Keep-Alive Ack" },
  81   { 0, NULL }
  82 };
  83
  84
  85 typedef struct _tap_calcappprotocol_rec_t {
  86   uint8_t     type;
  87   uint16_t    size;
  88   const char* type_string;
  89 } tap_calcappprotocol_rec_t;
  90
  91
  92 static void
  93 dissect_calcappprotocol_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *calcappprotocol_tree)
  94 {
  95   tap_calcappprotocol_rec_t* tap_rec = wmem_new0(pinfo->pool, tap_calcappprotocol_rec_t);
  96   tap_rec->type        = tvb_get_uint8(message_tvb, MESSAGE_TYPE_OFFSET);
  97   tap_rec->size        = tvb_get_ntohs(message_tvb,  MESSAGE_LENGTH_OFFSET);
  98   tap_rec->type_string = val_to_str_const(tap_rec->type, message_type_values, "Unknown CalcAppProtocol message type");
  99   tap_queue_packet(tap_calcappprotocol, pinfo, tap_rec);
 100
 101   col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", tap_rec->type_string);
 102
 103   proto_tree_add_item(calcappprotocol_tree, hf_message_type,      message_tvb, MESSAGE_TYPE_OFFSET,      MESSAGE_TYPE_LENGTH,      ENC_BIG_ENDIAN);
 104   proto_tree_add_item(calcappprotocol_tree, hf_message_flags,     message_tvb, MESSAGE_FLAGS_OFFSET,     MESSAGE_FLAGS_LENGTH,     ENC_BIG_ENDIAN);
 105   proto_tree_add_item(calcappprotocol_tree, hf_message_length,    message_tvb, MESSAGE_LENGTH_OFFSET,    MESSAGE_LENGTH_LENGTH,    ENC_BIG_ENDIAN);
 106   proto_tree_add_item(calcappprotocol_tree, hf_message_jobid,     message_tvb, MESSAGE_JOBID_OFFSET,     MESSAGE_JOBID_LENGTH,     ENC_BIG_ENDIAN);
 107   proto_tree_add_item(calcappprotocol_tree, hf_message_jobsize,   message_tvb, MESSAGE_JOBSIZE_OFFSET,   MESSAGE_JOBSIZE_LENGTH,   ENC_BIG_ENDIAN);
 108   proto_tree_add_item(calcappprotocol_tree, hf_message_completed, message_tvb, MESSAGE_COMPLETED_OFFSET, MESSAGE_COMPLETED_LENGTH, ENC_BIG_ENDIAN);
 109 }
 110
 111
 112 static int
 113 dissect_calcappprotocol(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 114 {
 115   proto_item *calcappprotocol_item;
 116   proto_tree *calcappprotocol_tree;
 117
 118   col_set_str(pinfo->cinfo, COL_PROTOCOL, "CalcAppProtocol");
 119
 120   /* In the interest of speed, if "tree" is NULL, don't do any work not
 121      necessary to generate protocol tree items. */
 122   if (tree) {
 123     /* create the calcappprotocol protocol tree */
 124     calcappprotocol_item = proto_tree_add_item(tree, proto_calcappprotocol, message_tvb, 0, -1, ENC_NA);
 125     calcappprotocol_tree = proto_item_add_subtree(calcappprotocol_item, ett_calcappprotocol);
 126   } else {
 127     calcappprotocol_tree = NULL;
 128   };
 129   /* dissect the message */
 130   dissect_calcappprotocol_message(message_tvb, pinfo, calcappprotocol_tree);
 131   return true;
 132 }
 133
 134
 135 /* TAP STAT INFO */
 136 typedef enum
 137 {
 138   MESSAGE_TYPE_COLUMN = 0,
 139   MESSAGES_COLUMN,
 140   MESSAGES_SHARE_COLUMN,
 141   BYTES_COLUMN,
 142   BYTES_SHARE_COLUMN,
 143   FIRST_SEEN_COLUMN,
 144   LAST_SEEN_COLUMN,
 145   INTERVAL_COLUMN,
 146   MESSAGE_RATE_COLUMN,
 147   BYTE_RATE_COLUMN
 148 } calcappprotocol_stat_columns;
 149
 150 static stat_tap_table_item calcappprotocol_stat_fields[] = {
 151   { TABLE_ITEM_STRING, TAP_ALIGN_LEFT,  "CalcAppProtocol Message Type", "%-25s" },
 152   { TABLE_ITEM_UINT,   TAP_ALIGN_RIGHT, "Messages ",            "%u"       },
 153   { TABLE_ITEM_UINT,   TAP_ALIGN_RIGHT, "Messages Share (%)"  , "%1.3f %%" },
 154   { TABLE_ITEM_UINT,   TAP_ALIGN_RIGHT, "Bytes (B)",            "%u"       },
 155   { TABLE_ITEM_UINT,   TAP_ALIGN_RIGHT, "Bytes Share (%) ",     "%1.3f %%" },
 156   { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "First Seen (s)",       "%1.6f"    },
 157   { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "Last Seen (s)",        "%1.6f"    },
 158   { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "Interval (s)",         "%1.6f"    },
 159   { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "Message Rate (Msg/s)", "%1.2f"    },
 160   { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "Byte Rate (B/s)",      "%1.2f"    }
 161 };
 162
 163 static void calcappprotocol_stat_init(stat_tap_table_ui* new_stat)
 164 {
 165   const char *table_name = "CalcAppProtocol Statistics";
 166   int num_fields = array_length(calcappprotocol_stat_fields);
 167   stat_tap_table *table;
 168   int i = 0;
 169   stat_tap_table_item_type items[array_length(calcappprotocol_stat_fields)];
 170
 171   table = stat_tap_find_table(new_stat, table_name);
 172   if (table) {
 173     if (new_stat->stat_tap_reset_table_cb) {
 174       new_stat->stat_tap_reset_table_cb(table);
 175     }
 176     return;
 177   }
 178
 179   table = stat_tap_init_table(table_name, num_fields, 0, NULL);
 180   stat_tap_add_table(new_stat, table);
 181
 182   memset(items, 0x0, sizeof(items));
 183   /* Add a row for each value type */
 184   while (message_type_values[i].strptr) {
 185     items[MESSAGE_TYPE_COLUMN].type                = TABLE_ITEM_STRING;
 186     items[MESSAGE_TYPE_COLUMN].value.string_value  = message_type_values[i].strptr;
 187     items[MESSAGES_COLUMN].type                    = TABLE_ITEM_UINT;
 188     items[MESSAGES_COLUMN].value.uint_value        = 0;
 189     items[MESSAGES_SHARE_COLUMN].type              = TABLE_ITEM_NONE;
 190     items[MESSAGES_SHARE_COLUMN].value.float_value = -1.0;
 191     items[BYTES_COLUMN].type                       = TABLE_ITEM_UINT;
 192     items[BYTES_COLUMN].value.uint_value           = 0;
 193     items[BYTES_SHARE_COLUMN].type                 = TABLE_ITEM_NONE;
 194     items[BYTES_SHARE_COLUMN].value.float_value    = -1.0;
 195     items[FIRST_SEEN_COLUMN].type                  = TABLE_ITEM_NONE;
 196     items[FIRST_SEEN_COLUMN].value.float_value     = DBL_MAX;
 197     items[LAST_SEEN_COLUMN].type                   = TABLE_ITEM_NONE;
 198     items[LAST_SEEN_COLUMN].value.float_value      = DBL_MIN;
 199     items[INTERVAL_COLUMN].type                    = TABLE_ITEM_NONE;
 200     items[INTERVAL_COLUMN].value.float_value       = -1.0;
 201     items[MESSAGE_RATE_COLUMN].type                = TABLE_ITEM_NONE;
 202     items[MESSAGE_RATE_COLUMN].value.float_value   = -1.0;
 203     items[BYTE_RATE_COLUMN].type                   = TABLE_ITEM_NONE;
 204     items[BYTE_RATE_COLUMN].value.float_value      = -1.0;
 205     stat_tap_init_table_row(table, i, num_fields, items);
 206     i++;
 207   }
 208 }
 209
 210 static tap_packet_status
 211 calcappprotocol_stat_packet(void* tapdata, packet_info* pinfo _U_, epan_dissect_t* edt _U_, const void* data, tap_flags_t flags _U_)
 212 {
 213   stat_data_t*                     stat_data = (stat_data_t*)tapdata;
 214   const tap_calcappprotocol_rec_t* tap_rec   = (const tap_calcappprotocol_rec_t*)data;
 215   stat_tap_table*                  table;
 216   stat_tap_table_item_type*        msg_data;
 217   int                              idx;
 218   uint64_t                         messages;
 219   uint64_t                         bytes;
 220   int                              i         = 0;
 221   double                           firstSeen = -1.0;
 222   double                           lastSeen  = -1.0;
 223
 224   idx = str_to_val_idx(tap_rec->type_string, message_type_values);
 225   if (idx < 0)
 226     return TAP_PACKET_DONT_REDRAW;
 227
 228   table = g_array_index(stat_data->stat_tap_data->tables, stat_tap_table*, 0);
 229
 230   /* Update packets counter */
 231   calcappprotocol_total_msgs++;
 232   msg_data = stat_tap_get_field_data(table, idx, MESSAGES_COLUMN);
 233   msg_data->value.uint_value++;
 234   messages = msg_data->value.uint_value;
 235   stat_tap_set_field_data(table, idx, MESSAGES_COLUMN, msg_data);
 236
 237   /* Update bytes counter */
 238   calcappprotocol_total_bytes += tap_rec->size;
 239   msg_data = stat_tap_get_field_data(table, idx, BYTES_COLUMN);
 240   msg_data->value.uint_value += tap_rec->size;
 241   bytes = msg_data->value.uint_value;
 242   stat_tap_set_field_data(table, idx, BYTES_COLUMN, msg_data);
 243
 244   /* Update messages and bytes share */
 245   while (message_type_values[i].strptr) {
 246     msg_data = stat_tap_get_field_data(table, i, MESSAGES_COLUMN);
 247     const unsigned m = msg_data->value.uint_value;
 248     msg_data = stat_tap_get_field_data(table, i, BYTES_COLUMN);
 249     const unsigned b = msg_data->value.uint_value;
 250
 251     msg_data = stat_tap_get_field_data(table, i, MESSAGES_SHARE_COLUMN);
 252     msg_data->type = TABLE_ITEM_FLOAT;
 253     msg_data->value.float_value = 100.0 * m / (double)calcappprotocol_total_msgs;
 254     stat_tap_set_field_data(table, i, MESSAGES_SHARE_COLUMN, msg_data);
 255
 256     msg_data = stat_tap_get_field_data(table, i, BYTES_SHARE_COLUMN);
 257     msg_data->type = TABLE_ITEM_FLOAT;
 258     msg_data->value.float_value = 100.0 * b / (double)calcappprotocol_total_bytes;
 259     stat_tap_set_field_data(table, i, BYTES_SHARE_COLUMN, msg_data);
 260     i++;
 261   }
 262
 263   /* Update first seen time */
 264   if (pinfo->presence_flags & PINFO_HAS_TS) {
 265     msg_data = stat_tap_get_field_data(table, idx, FIRST_SEEN_COLUMN);
 266     msg_data->type = TABLE_ITEM_FLOAT;
 267     msg_data->value.float_value = MIN(msg_data->value.float_value, nstime_to_sec(&pinfo->rel_ts));
 268     firstSeen = msg_data->value.float_value;
 269     stat_tap_set_field_data(table, idx, FIRST_SEEN_COLUMN, msg_data);
 270   }
 271
 272   /* Update last seen time */
 273   if (pinfo->presence_flags & PINFO_HAS_TS) {
 274     msg_data = stat_tap_get_field_data(table, idx, LAST_SEEN_COLUMN);
 275     msg_data->type = TABLE_ITEM_FLOAT;
 276     msg_data->value.float_value = MAX(msg_data->value.float_value, nstime_to_sec(&pinfo->rel_ts));
 277     lastSeen = msg_data->value.float_value;
 278     stat_tap_set_field_data(table, idx, LAST_SEEN_COLUMN, msg_data);
 279   }
 280
 281   if ((lastSeen - firstSeen) > 0.0) {
 282     /* Update interval */
 283     msg_data = stat_tap_get_field_data(table, idx, INTERVAL_COLUMN);
 284     msg_data->type = TABLE_ITEM_FLOAT;
 285     msg_data->value.float_value = lastSeen - firstSeen;
 286     stat_tap_set_field_data(table, idx, INTERVAL_COLUMN, msg_data);
 287
 288     /* Update message rate */
 289     msg_data = stat_tap_get_field_data(table, idx, MESSAGE_RATE_COLUMN);
 290     msg_data->type = TABLE_ITEM_FLOAT;
 291     msg_data->value.float_value = messages / (lastSeen - firstSeen);
 292     stat_tap_set_field_data(table, idx, MESSAGE_RATE_COLUMN, msg_data);
 293
 294     /* Update byte rate */
 295     msg_data = stat_tap_get_field_data(table, idx, BYTE_RATE_COLUMN);
 296     msg_data->type = TABLE_ITEM_FLOAT;
 297     msg_data->value.float_value = bytes / (lastSeen - firstSeen);
 298     stat_tap_set_field_data(table, idx, BYTE_RATE_COLUMN, msg_data);
 299   }
 300
 301   return TAP_PACKET_REDRAW;
 302 }
 303
 304 static void
 305 calcappprotocol_stat_reset(stat_tap_table* table)
 306 {
 307   unsigned element;
 308   stat_tap_table_item_type* item_data;
 309
 310   for (element = 0; element < table->num_elements; element++) {
 311     item_data = stat_tap_get_field_data(table, element, MESSAGES_COLUMN);
 312     item_data->value.uint_value = 0;
 313     stat_tap_set_field_data(table, element, MESSAGES_COLUMN, item_data);
 314
 315     item_data = stat_tap_get_field_data(table, element, MESSAGES_SHARE_COLUMN);
 316     item_data->type = TABLE_ITEM_NONE;
 317     item_data->value.float_value = -1.0;
 318     stat_tap_set_field_data(table, element, MESSAGES_SHARE_COLUMN, item_data);
 319
 320     item_data = stat_tap_get_field_data(table, element, BYTES_COLUMN);
 321     item_data->value.uint_value = 0;
 322     stat_tap_set_field_data(table, element, BYTES_COLUMN, item_data);
 323
 324     item_data = stat_tap_get_field_data(table, element, BYTES_SHARE_COLUMN);
 325     item_data->type = TABLE_ITEM_NONE;
 326     item_data->value.float_value = -1.0;
 327     stat_tap_set_field_data(table, element, BYTES_SHARE_COLUMN, item_data);
 328
 329     item_data = stat_tap_get_field_data(table, element, FIRST_SEEN_COLUMN);
 330     item_data->type = TABLE_ITEM_NONE;
 331     item_data->value.float_value = DBL_MAX;
 332     stat_tap_set_field_data(table, element, FIRST_SEEN_COLUMN, item_data);
 333
 334     item_data = stat_tap_get_field_data(table, element, LAST_SEEN_COLUMN);
 335     item_data->type = TABLE_ITEM_NONE;
 336     item_data->value.float_value = DBL_MIN;
 337     stat_tap_set_field_data(table, element, LAST_SEEN_COLUMN, item_data);
 338
 339     item_data = stat_tap_get_field_data(table, element, INTERVAL_COLUMN);
 340     item_data->type = TABLE_ITEM_NONE;
 341     item_data->value.float_value = -1.0;
 342     stat_tap_set_field_data(table, element, INTERVAL_COLUMN, item_data);
 343
 344     item_data = stat_tap_get_field_data(table, element, MESSAGE_RATE_COLUMN);
 345     item_data->type = TABLE_ITEM_NONE;
 346     item_data->value.float_value = -1.0;
 347     stat_tap_set_field_data(table, element, MESSAGE_RATE_COLUMN, item_data);
 348
 349     item_data = stat_tap_get_field_data(table, element, BYTE_RATE_COLUMN);
 350     item_data->type = TABLE_ITEM_NONE;
 351     item_data->value.float_value = -1.0;
 352     stat_tap_set_field_data(table, element, BYTE_RATE_COLUMN, item_data);
 353   }
 354   calcappprotocol_total_msgs  = 0;
 355   calcappprotocol_total_bytes = 0;
 356 }
 357
 358
 359 /* Register the protocol with Wireshark */
 360 void
 361 proto_register_calcappprotocol(void)
 362 {
 363
 364   /* Setup list of header fields */
 365   static hf_register_info hf[] = {
 366     { &hf_message_type,      { "Type",      "calcappprotocol.message_type",      FT_UINT8,  BASE_DEC, VALS(message_type_values), 0x0, NULL, HFILL } },
 367     { &hf_message_flags,     { "Flags",     "calcappprotocol.message_flags",     FT_UINT8,  BASE_DEC, NULL,                      0x0, NULL, HFILL } },
 368     { &hf_message_length,    { "Length",    "calcappprotocol.message_length",    FT_UINT16, BASE_DEC, NULL,                      0x0, NULL, HFILL } },
 369     { &hf_message_jobid,     { "JobID",     "calcappprotocol.message_jobid",     FT_UINT32, BASE_DEC, NULL,                      0x0, NULL, HFILL } },
 370     { &hf_message_jobsize,   { "JobSize",   "calcappprotocol.message_jobsize",   FT_UINT64, BASE_DEC, NULL,                      0x0, NULL, HFILL } },
 371     { &hf_message_completed, { "Completed", "calcappprotocol.message_completed", FT_UINT64, BASE_DEC, NULL,                      0x0, NULL, HFILL } },
 372   };
 373
 374   /* Setup protocol subtree array */
 375   static int *ett[] = {
 376     &ett_calcappprotocol
 377   };
 378
 379   static tap_param calcappprotocol_stat_params[] = {
 380     { PARAM_FILTER, "filter", "Filter", NULL, true }
 381   };
 382
 383   static stat_tap_table_ui calcappprotocol_stat_table = {
 384     REGISTER_STAT_GROUP_RSERPOOL,
 385     "CalcAppProtocol Statistics",
 386     "calcappprotocol",
 387     "calcappprotocol,stat",
 388     calcappprotocol_stat_init,
 389     calcappprotocol_stat_packet,
 390     calcappprotocol_stat_reset,
 391     NULL,
 392     NULL,
 393     array_length(calcappprotocol_stat_fields), calcappprotocol_stat_fields,
 394     array_length(calcappprotocol_stat_params), calcappprotocol_stat_params,
 395     NULL,
 396     0
 397   };
 398
 399   /* Register the protocol name and description */
 400   proto_calcappprotocol = proto_register_protocol("Calculation Application Protocol", "CalcAppProtocol", "calcappprotocol");
 401
 402   /* Required function calls to register the header fields and subtrees used */
 403   proto_register_field_array(proto_calcappprotocol, hf, array_length(hf));
 404   proto_register_subtree_array(ett, array_length(ett));
 405   tap_calcappprotocol = register_tap("calcappprotocol");
 406
 407   register_stat_tap_table_ui(&calcappprotocol_stat_table);
 408
 409   calcappprotocol_handle = register_dissector("calcappprotocol", dissect_calcappprotocol, proto_calcappprotocol);
 410 }
 411
 412 void
 413 proto_reg_handoff_calcappprotocol(void)
 414 {
 415   dissector_add_uint("sctp.ppi", CALCAPPPROTOCOL_PAYLOAD_PROTOCOL_ID_LEGACY, calcappprotocol_handle);
 416   dissector_add_uint("sctp.ppi", CALCAPP_PAYLOAD_PROTOCOL_ID, calcappprotocol_handle);
 417 }
 418
 419 /*
 420  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 421  *
 422  * Local Variables:
 423  * c-basic-offset: 2
 424  * tab-width: 8
 425  * indent-tabs-mode: nil
 426  * End:
 427  *
 428  * ex: set shiftwidth=2 tabstop=8 expandtab:
 429  * :indentSize=2:tabSize=8:noTabs=true:
 430  */