wiretap/k12.c

   1 /*
   2  * k12.c
   3  *
   4  *  routines for importing tektronix k12xx *.rf5 files
   5  *
   6  *  Copyright (c) 2005, Luis E. Garia Ontanon <luis.ontanon@gmail.com>
   7  *
   8  * $Id$
   9  *
  10  * Wiretap Library
  11  * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <errno.h>
  34 #include "wtap-int.h"
  35 #include "wtap.h"
  36 #include "file_wrappers.h"
  37 #include "buffer.h"
  38 #include "k12.h"
  39
  40 /*
  41  * the 32 bits .rf5 file contains:
  42  *  an 8 byte magic number
  43  *  32bit lenght
  44  *  32bit number of records
  45  *  other 0x200 bytes bytes of uncharted territory
  46  *     1 or more copies of the num_of_records in there
  47  *  the records whose first 32bits word is the length
  48  *     they are stuffed by one to four words every 0x2000 bytes
  49  *  and a 2 byte terminator FFFF
  50  */
  51
  52 static const guint8 k12_file_magic[] = { 0x00, 0x00, 0x02, 0x00 ,0x12, 0x05, 0x00, 0x10 };
  53
  54 struct _k12_t {
  55         guint32 file_len;
  56         guint32 num_of_records; /* XXX: not sure about this */
  57
  58         GHashTable* src_by_id; /* k12_srcdsc_recs by input */
  59         GHashTable* src_by_name; /* k12_srcdsc_recs by stack_name */
  60 };
  61
  62 typedef struct _k12_src_desc_t {
  63         guint32 input;
  64         guint32 input_type;
  65         gchar* input_name;
  66         gchar* stack_file;
  67         k12_input_info_t input_info;
  68 } k12_src_desc_t;
  69
  70
  71 /* so far we've seen only 7 types of records */
  72 #define K12_REC_PACKET          0x00010020
  73 #define K12_REC_SRCDSC          0x00070041 /* port-stack mapping + more, the key of the whole thing */
  74 #define K12_REC_SCENARIO        0x00070040 /* what appears as the window's title */
  75 #define K12_REC_70042           0x00070042 /* XXX: ??? */
  76 #define K12_REC_70044           0x00070044 /* text with a grammar (conditions/responses) */
  77 #define K12_REC_20030           0x00020030 /* human readable start time  */
  78 #define K12_REC_20032           0x00020031 /* human readable stop time */
  79
  80 #define K12_MASK_PACKET         0xfffffff0
  81
  82
  83 #define K12_RECORD_LEN         0x0
  84 #define K12_RECORD_TYPE        0x4
  85 #define K12_RECORD_FRAME_LEN   0x8
  86 #define K12_RECORD_INPUT      0xc
  87
  88 #define K12_PACKET_TIMESTAMP  0x18
  89 #define K12_PACKET_FRAME      0x20
  90
  91 #define K12_SRCDESC_EXTRALEN   0x1e
  92 #define K12_SRCDESC_NAMELEN    0x20
  93 #define K12_SRCDESC_STACKLEN   0x22
  94
  95 #define K12_SRCDESC_EXTRATYPE  0x24
  96 #define K12_SRCDESC_ATM_VPI    0x38
  97 #define K12_SRCDESC_ATM_VCI    0x3a
  98 #define K12_SRCDESC_DS0_MASK   0x3c
  99
 100
 101
 102 /*
 103  * get_record: Get the next record into a buffer
 104  *   Every about 0x2000 bytes 0x10 bytes are inserted in the file,
 105  *   even in the middle of a record.
 106  *   This reads the next record without the eventual 0x10 bytes.
 107  *   returns the lenght of the record + the stuffing (if any)
 108  *
 109  * XXX: works at most with 0x1FFF bytes per record
 110  */
 111 static gint get_record(guint8* buffer, FILE* fh, guint file_offset) {
 112         long read;
 113         long len;
 114         int i;
 115         long junky_offset = 0x2000 - ( (file_offset - 0x200) % 0x2000 );
 116
 117         if  ( junky_offset != 0x2000 ) {
 118
 119                 /* safe header */
 120                 read = file_read(buffer,1, 0x4,fh);
 121
 122                 if (read == 2 && buffer[0] == 0xff && buffer[1] == 0xff) {
 123                         return 0;
 124                 } else if ( read != 0x4 ) {
 125                         return -1;
 126                 }
 127
 128                 len = pntohl(buffer) & 0x00001FFF;
 129
 130                 if (junky_offset > len) {
 131                         /* safe body */
 132                         if (len - 0x4 <= 0) {
 133                                 return -1;
 134                         }
 135
 136                         if ( file_read(buffer+0x4, 1, len - 0x4, fh) < len - 0x4 ) {
 137                                 return -1;
 138                         } else {
 139                                 return len;
 140                         }
 141                 } else {
 142                         if ( file_read(buffer+0x4, 1, len + 0xC, fh) < len ) {
 143                                 return -1;
 144                         }
 145
 146                         for (i = junky_offset; i < len; i++) {
 147                                 buffer[i] = buffer[i+0x10];
 148                         }
 149
 150                         return len + 0x10;
 151                 }
 152         } else {
 153                 /* unsafe header */
 154
 155                 read = file_read(buffer,1,0x14,fh);
 156
 157                 if (read == 2 && buffer[0] == 0xff && buffer[1] == 0xff) {
 158                         return 0;
 159                 } else if ( read < 0x14 ){
 160                         return -1;
 161                 }
 162
 163                 for (i = 0; i < 0x10; i++) {
 164                         buffer[i] = buffer[i+0x10];
 165                 }
 166
 167                 len = pntohl(buffer) & 0x00001FFF;
 168
 169                 if (len - 0x4 <= 0)
 170                         return -1;
 171
 172                 /* safe body */
 173                 if ( file_read(buffer + 0x4, 1, len - 0x4,fh) < len - 0x4 ) {
 174                         return -1;
 175                 } else {
 176                         return len + 0x10;
 177                 }
 178         }
 179 }
 180
 181 static gboolean k12_read(wtap *wth, int *err, gchar **err_info _U_, long *data_offset) {
 182         k12_src_desc_t* src_desc;
 183         guint8 buffer[0x2000];
 184         long offset;
 185         long len;
 186         guint32 type;
 187         guint64 ts;
 188
 189         offset = wth->data_offset;
 190
 191         /* ignore the record if it isn't a packet */
 192         do {
 193                 *data_offset = offset;
 194
 195                 len = get_record(buffer, wth->fh, offset);
 196
 197                 if (len < 0) {
 198                         *err = WTAP_ERR_SHORT_READ;
 199                         return FALSE;
 200                 } else if (len == 0) {
 201                         *err = 0;
 202                         return FALSE;
 203                 }
 204
 205                 type = pntohl(buffer + K12_RECORD_TYPE);
 206
 207                 offset += len;
 208
 209         } while ( (type & K12_MASK_PACKET) != K12_REC_PACKET );
 210
 211         wth->data_offset = offset;
 212
 213         ts = pntohll(buffer + K12_PACKET_TIMESTAMP);
 214
 215         wth->phdr.ts.secs = (guint32) ( (ts % 2000000) / 2);
 216         wth->phdr.ts.nsecs = (guint32) ((ts / 2000000) + 631152000) * 1000;
 217
 218         wth->phdr.len = wth->phdr.caplen = pntohl(buffer + K12_RECORD_FRAME_LEN) & 0x00001FFF;
 219
 220         /* the frame */
 221         buffer_assure_space(wth->frame_buffer, wth->phdr.caplen);
 222         memcpy(buffer_start_ptr(wth->frame_buffer), buffer + K12_PACKET_FRAME, wth->phdr.caplen);
 223
 224         wth->pseudo_header.k12.input = pntohl(buffer + K12_RECORD_INPUT);
 225
 226         src_desc = g_hash_table_lookup(wth->capture.k12->src_by_id,GUINT_TO_POINTER(wth->pseudo_header.k12.input));
 227
 228         if (src_desc) {
 229                 wth->pseudo_header.k12.input_name = src_desc->input_name;
 230                 wth->pseudo_header.k12.stack_file = src_desc->stack_file;
 231                 wth->pseudo_header.k12.input_type = src_desc->input_type;
 232
 233                 memcpy(&(wth->pseudo_header.k12.input_info),&(src_desc->input_info),sizeof(src_desc->input_info));
 234         } else {
 235                 memset(&(wth->pseudo_header),0,sizeof(wth->pseudo_header));
 236                 wth->pseudo_header.k12.input_name = "unknown port";
 237                 wth->pseudo_header.k12.stack_file = "unknown stack file";
 238         }
 239
 240         wth->pseudo_header.k12.stuff = wth->capture.k12;
 241
 242         return TRUE;
 243 }
 244
 245
 246 static gboolean k12_seek_read(wtap *wth, long seek_off, union wtap_pseudo_header *pseudo_header, guchar *pd, int length, int *err _U_, gchar **err_info _U_) {
 247         k12_src_desc_t* src_desc;
 248         guint8 buffer[0x2000];
 249
 250         if ( file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1) {
 251                 return FALSE;
 252         }
 253
 254         if (get_record(buffer, wth->random_fh, seek_off) < 1) {
 255                 return FALSE;
 256         }
 257
 258         memcpy(pd, buffer + K12_PACKET_FRAME, length);
 259
 260         pseudo_header->k12.input = pntohl(buffer + K12_RECORD_INPUT);
 261
 262         src_desc = g_hash_table_lookup(wth->capture.k12->src_by_id,GUINT_TO_POINTER(wth->pseudo_header.k12.input));
 263
 264         if (src_desc) {
 265                 pseudo_header->k12.input_name = src_desc->input_name;
 266                 pseudo_header->k12.stack_file = src_desc->stack_file;
 267                 pseudo_header->k12.input_type = src_desc->input_type;
 268
 269                 memcpy(&(pseudo_header->k12.input_info),&(src_desc->input_info),sizeof(src_desc->input_info));
 270         } else {
 271                 memset(&(wth->pseudo_header),0,sizeof(wth->pseudo_header));
 272                 pseudo_header->k12.input_name = "unknown port";
 273                 pseudo_header->k12.stack_file = "unknown stack file";
 274         }
 275
 276         pseudo_header->k12.stuff = wth->capture.k12;
 277         return TRUE;
 278 }
 279
 280
 281 static k12_t* new_k12_file_data() {
 282         k12_t* fd = g_malloc(sizeof(k12_t));
 283
 284         fd->file_len = 0;
 285         fd->num_of_records = 0;
 286         fd->src_by_name = g_hash_table_new(g_str_hash,g_str_equal);
 287         fd->src_by_id = g_hash_table_new(g_direct_hash,g_direct_equal);
 288
 289         return fd;
 290 }
 291
 292 static gboolean destroy_srcdsc(gpointer k _U_, gpointer v, gpointer p _U_) {
 293         k12_src_desc_t* rec = v;
 294
 295         if(rec->input_name)
 296                 g_free(rec->input_name);
 297
 298         if(rec->stack_file)
 299                 g_free(rec->stack_file);
 300
 301         g_free(rec);
 302
 303         return TRUE;
 304 }
 305
 306 static void destroy_k12_file_data(k12_t* fd) {
 307         g_hash_table_destroy(fd->src_by_id);
 308         g_hash_table_foreach_remove(fd->src_by_name,destroy_srcdsc,NULL);
 309         g_hash_table_destroy(fd->src_by_name);
 310         g_free(fd);
 311 }
 312
 313 static void k12_close(wtap *wth) {
 314         destroy_k12_file_data(wth->capture.k12);
 315 }
 316
 317
 318 int k12_open(wtap *wth, int *err, gchar **err_info _U_) {
 319         k12_src_desc_t* rec;
 320         guint8 read_buffer[0x2000];
 321         guint32 type;
 322         long offset;
 323         long len;
 324         guint32 rec_len;
 325         guint32 extra_len;
 326         guint32 name_len;
 327         guint32 stack_len;
 328         guint i;
 329         k12_t* file_data;
 330
 331         if ( file_read(read_buffer,1,0x200,wth->fh) != 0x200 ) {
 332                 return 0;
 333         } else {
 334                 if ( memcmp(read_buffer,k12_file_magic,8) != 0 ) {
 335                         return 0;
 336                 }
 337         }
 338
 339         offset = 0x200;
 340
 341         file_data = new_k12_file_data();
 342
 343         file_data->file_len = pntohl( read_buffer + 0x8);
 344         file_data->num_of_records = pntohl( read_buffer + 0xC );
 345
 346         do {
 347
 348                 len = get_record(read_buffer, wth->fh, offset);
 349
 350                 if ( len <= 0 ) {
 351                         return -1;
 352                 }
 353
 354
 355                 type = pntohl( read_buffer + K12_RECORD_TYPE );
 356
 357                 if ( (type & K12_MASK_PACKET) == K12_REC_PACKET) {
 358                         /*
 359                          * we are at the first packet record, rewind and leave.
 360                          */
 361                         if (file_seek(wth->fh, offset, SEEK_SET, err) == -1) {
 362                                 destroy_k12_file_data(file_data);
 363                                 return -1;
 364                         }
 365
 366                         break;
 367                 } else if (type == K12_REC_SRCDSC) {
 368                         rec = g_malloc0(sizeof(k12_src_desc_t));
 369
 370                         rec_len = pntohl( read_buffer + K12_RECORD_LEN );
 371                         rec->input = pntohl( read_buffer + K12_RECORD_INPUT );
 372                         extra_len = pntohs( read_buffer + K12_SRCDESC_EXTRALEN );
 373                         name_len = pntohs( read_buffer + K12_SRCDESC_NAMELEN );
 374                         stack_len = pntohs( read_buffer + K12_SRCDESC_STACKLEN );
 375
 376                         if (extra_len == 0 || name_len == 0 || stack_len == 0
 377                                 || 0x20 + extra_len + name_len + stack_len > rec_len ) {
 378                                 return 0;
 379                         }
 380
 381                         switch(( rec->input_type = pntohl( read_buffer + K12_SRCDESC_EXTRATYPE ) )) {
 382                                 case K12_PORT_DS0S:
 383                                         rec->input_info.ds0mask = 0x00000000;
 384
 385                                         for (i = 0; i < 32; i++) {
 386                                                 rec->input_info.ds0mask |= ( *(read_buffer + K12_SRCDESC_DS0_MASK + i) == 0xff ) ? 0x1<<(31-i) : 0x0;
 387                                         }
 388
 389                                                 break;
 390                                 case K12_PORT_ATMPVC:
 391                                         rec->input_info.atm.vp = pntohs( read_buffer + K12_SRCDESC_ATM_VPI );
 392                                         rec->input_info.atm.vc = pntohs( read_buffer + K12_SRCDESC_ATM_VCI );
 393                                         break;
 394                                 default:
 395                                         break;
 396                         }
 397
 398                         rec->input_name = g_memdup(read_buffer + K12_SRCDESC_EXTRATYPE + extra_len, name_len);
 399                         rec->stack_file = g_memdup(read_buffer + K12_SRCDESC_EXTRATYPE + extra_len + name_len, stack_len);
 400
 401                         g_strdown(rec->stack_file);
 402
 403                         g_hash_table_insert(file_data->src_by_id,GUINT_TO_POINTER(rec->input),rec);
 404                         g_hash_table_insert(file_data->src_by_name,rec->stack_file,rec);
 405
 406                         offset += len;
 407                         continue;
 408                 } else {
 409                         offset += len;
 410                         continue;
 411                 }
 412         } while(1);
 413
 414         wth->data_offset = offset;
 415         wth->file_type = WTAP_FILE_K12;
 416         wth->file_encap = WTAP_ENCAP_K12;
 417         wth->snapshot_length = 0;
 418         wth->subtype_read = k12_read;
 419         wth->subtype_seek_read = k12_seek_read;
 420         wth->subtype_close = k12_close;
 421         wth->capture.k12 = file_data;
 422
 423         /* if we use just one encapsulation for all the file
 424                 we will use that for the whole file so we can
 425                 use more formats to save to */
 426
 427
 428         return 1;
 429 }
 430
 431 int k12_dump_can_write_encap(int encap) {
 432
 433         if (encap == WTAP_ENCAP_PER_PACKET)
 434                 return WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED;
 435
 436         if (encap != WTAP_ENCAP_K12)
 437                 return WTAP_ERR_UNSUPPORTED_ENCAP;
 438
 439         return 0;
 440 }
 441
 442 static const gchar dumpy_junk[] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
 443
 444 static void k12_dump_record(wtap_dumper *wdh, long len,  guint8* buffer) {
 445         long junky_offset = (0x2000 - ( (wdh->dump.k12->file_offset - 0x200) % 0x2000 )) % 0x2000;
 446
 447         if (len > junky_offset) {
 448
 449                 if (junky_offset)
 450                         fwrite(buffer, 1, junky_offset, wdh->fh);
 451
 452                 fwrite(dumpy_junk, 1, 0x10, wdh->fh);
 453
 454                 fwrite(buffer+junky_offset, 1, len - junky_offset, wdh->fh);
 455
 456                 wdh->dump.k12->file_offset += len + 0x10;
 457         } else {
 458                 fwrite(buffer, 1, len, wdh->fh);
 459                 wdh->dump.k12->file_offset += len;
 460         }
 461
 462         wdh->dump.k12->num_of_records++;
 463 }
 464
 465 static void k12_dump_src_setting(gpointer k _U_, gpointer v, gpointer p) {
 466         k12_src_desc_t* src_desc = v;
 467         wtap_dumper *wdh = p;
 468         guint32 len;
 469         guint offset;
 470         guint i;
 471
 472         union {
 473                 guint8 buffer[0x2000];
 474
 475                 struct {
 476                         guint32 len;
 477                         guint32 type;
 478                         guint32 unk32_1;
 479                         guint32 input;
 480
 481                         guint32 unk32_2;
 482                         guint32 unk32_3;
 483                         guint32 unk32_4;
 484                         guint16 unk16_1;
 485                         guint16 extra_len;
 486
 487                         guint16 name_len;
 488                         guint16 stack_len;
 489
 490                         struct {
 491                                 guint32 type;
 492
 493                                 union {
 494                                         struct {
 495                                                 guint32 unk32;
 496                                                 guint8 mask[32];
 497                                         } ds0mask;
 498
 499                                         struct {
 500                                                 guint8 unk_data[0x10];
 501                                                 guint16 vp;
 502                                                 guint16 vc;
 503                                         } atm;
 504
 505                                         guint32 unk;
 506                                 } desc;
 507                         } extra;
 508                 } record;
 509         } obj;
 510
 511         obj.record.type = g_htonl(K12_REC_SRCDSC);
 512         obj.record.unk32_1 = g_htonl(0x00000001);
 513         obj.record.input = g_htonl(src_desc->input);
 514
 515         obj.record.unk32_2 = g_htonl(0x0000060f);
 516         obj.record.unk32_3 = g_htonl(0x00000003);
 517         obj.record.unk32_4 = g_htonl(0x01000100);
 518
 519         obj.record.unk16_1 = g_htons(0x0000);
 520         obj.record.name_len = strlen(src_desc->input_name) + 1;
 521         obj.record.stack_len = strlen(src_desc->stack_file) + 1;
 522
 523         obj.record.extra.type = g_htonl(src_desc->input_type);
 524
 525         switch (src_desc->input_type) {
 526                 case K12_PORT_ATMPVC:
 527                         obj.record.extra_len = g_htons(0x18);
 528                         obj.record.extra.desc.atm.vp = g_htons(src_desc->input_info.atm.vp);
 529                         obj.record.extra.desc.atm.vc = g_htons(src_desc->input_info.atm.vc);
 530                         offset = 0x3c;
 531                         break;
 532                 case K12_PORT_DS0S:
 533                         obj.record.extra_len = g_htons(0x18);
 534                         for( i=0; i<32; i++ ) {
 535                                 obj.record.extra.desc.ds0mask.mask[i] =
 536                                         (src_desc->input_info.ds0mask & (1 << i)) ? 0xff : 0x00;
 537                         }
 538                         offset = 0x3c;
 539                         break;
 540                 default:
 541                         obj.record.extra_len = g_htons(0x08);
 542                         offset = 0x2c;
 543                         break;
 544         }
 545
 546         memcpy(obj.buffer + offset,
 547                    src_desc->input_name,
 548                    obj.record.name_len);
 549
 550         memcpy(obj.buffer + offset + obj.record.name_len,
 551                    src_desc->stack_file,
 552                    obj.record.stack_len);
 553
 554         len = offset + obj.record.name_len + obj.record.stack_len;
 555         len += (len % 4) ? 4 - (len % 4) : 0;
 556
 557         obj.record.len = g_htonl(len);
 558         obj.record.name_len =  g_htons(obj.record.name_len);
 559         obj.record.stack_len = g_htons(obj.record.stack_len);
 560
 561         k12_dump_record(wdh,len,obj.buffer);
 562 }
 563
 564 static gboolean k12_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr,
 565                                                         const union wtap_pseudo_header *pseudo_header,
 566                                                         const guchar *pd, int *err _U_) {
 567         long len;
 568         union {
 569                 guint8 buffer[0x2000];
 570                 struct {
 571                         guint32 len;
 572                         guint32 type;
 573                         guint32 frame_len;
 574                         guint32 input;
 575
 576                         guint32 datum_1;
 577                         guint32 datum_2;
 578                         guint64 ts;
 579
 580                         guint8 frame[0x1fc0];
 581                 } record;
 582         } obj;
 583
 584         if (wdh->dump.k12->num_of_records == 0) {
 585                 k12_t* file_data = pseudo_header->k12.stuff;
 586                 g_hash_table_foreach(file_data->src_by_id,k12_dump_src_setting,wdh);
 587         }
 588
 589         obj.record.len = 0x20 + phdr->len;
 590         obj.record.len += (obj.record.len % 4) ? 4 - obj.record.len % 4 : 0;
 591
 592         len = obj.record.len;
 593
 594         obj.record.len = g_htonl(obj.record.len);
 595
 596         obj.record.type = g_htonl(K12_REC_PACKET);
 597         obj.record.frame_len = g_htonl(phdr->len);
 598         obj.record.input = g_htonl(pseudo_header->k12.input);
 599
 600         obj.record.ts = GUINT64_TO_BE((((guint64)phdr->ts.secs - 631152000) * 2000000) + (phdr->ts.nsecs / 1000 * 2));
 601
 602         memcpy(obj.record.frame,pd,phdr->len);
 603
 604         k12_dump_record(wdh,len,obj.buffer);
 605
 606         /* XXX if OK */
 607         return TRUE;
 608 }
 609
 610 static const guint8 k12_eof[] = {0xff,0xff};
 611
 612 static gboolean k12_dump_close(wtap_dumper *wdh, int *err) {
 613         union {
 614                 guint8 b[sizeof(guint32)];
 615                 guint32 u;
 616         } d;
 617
 618         fwrite(k12_eof, 1, 2, wdh->fh);
 619
 620         if (fseek(wdh->fh, 8, SEEK_SET) == -1) {
 621                 *err = errno;
 622                 return FALSE;
 623         }
 624
 625         d.u = g_htonl(wdh->dump.k12->file_len);
 626
 627         fwrite(d.b, 1, 4, wdh->fh);
 628
 629         d.u = g_htonl(wdh->dump.k12->num_of_records);
 630
 631         fwrite(d.b, 1, 4, wdh->fh);
 632
 633         return TRUE;
 634 }
 635
 636
 637 gboolean k12_dump_open(wtap_dumper *wdh, gboolean cant_seek, int *err) {
 638
 639         if (cant_seek) {
 640                 *err = WTAP_ERR_CANT_WRITE_TO_PIPE;
 641                 return FALSE;
 642         }
 643
 644         if ( fwrite(k12_file_magic, 1, 8, wdh->fh) != 8 ) {
 645                 *err = errno;
 646                 return FALSE;
 647         }
 648
 649         if (fseek(wdh->fh, 0x200, SEEK_SET) == -1) {
 650                 *err = errno;
 651                 return FALSE;
 652         }
 653
 654         wdh->subtype_write = k12_dump;
 655         wdh->subtype_close = k12_dump_close;
 656
 657         wdh->dump.k12 = g_malloc(sizeof(k12_dump_t));
 658         wdh->dump.k12->file_len = 0x200;
 659         wdh->dump.k12->num_of_records = 0;
 660         wdh->dump.k12->file_offset  = 0x200;
 661
 662         return TRUE;
 663 }
 664
 665