drivers/isdn/capi/capiutil.c

   1 /* $Id: capiutil.c,v 1.13.6.4 2001/09/23 22:24:33 kai Exp $
   2  *
   3  * CAPI 2.0 convert capi message to capi message struct
   4  *
   5  * From CAPI 2.0 Development Kit AVM 1995 (msg.c)
   6  * Rewritten for Linux 1996 by Carsten Paeth <calle@calle.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/string.h>
  15 #include <linux/ctype.h>
  16 #include <linux/stddef.h>
  17 #include <linux/kernel.h>
  18 #include <linux/mm.h>
  19 #include <linux/init.h>
  20 #include <linux/isdn/capiutil.h>
  21 #include <linux/slab.h>
  22
  23 /* from CAPI2.0 DDK AVM Berlin GmbH */
  24
  25 typedef struct {
  26         int typ;
  27         size_t off;
  28 } _cdef;
  29
  30 #define _CBYTE         1
  31 #define _CWORD         2
  32 #define _CDWORD        3
  33 #define _CSTRUCT       4
  34 #define _CMSTRUCT      5
  35 #define _CEND          6
  36
  37 static _cdef cdef[] =
  38 {
  39         /*00 */
  40         {_CEND},
  41         /*01 */
  42         {_CEND},
  43         /*02 */
  44         {_CEND},
  45         /*03 */
  46         {_CDWORD, offsetof(_cmsg, adr.adrController)},
  47         /*04 */
  48         {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
  49         /*05 */
  50         {_CSTRUCT, offsetof(_cmsg, B1configuration)},
  51         /*06 */
  52         {_CWORD, offsetof(_cmsg, B1protocol)},
  53         /*07 */
  54         {_CSTRUCT, offsetof(_cmsg, B2configuration)},
  55         /*08 */
  56         {_CWORD, offsetof(_cmsg, B2protocol)},
  57         /*09 */
  58         {_CSTRUCT, offsetof(_cmsg, B3configuration)},
  59         /*0a */
  60         {_CWORD, offsetof(_cmsg, B3protocol)},
  61         /*0b */
  62         {_CSTRUCT, offsetof(_cmsg, BC)},
  63         /*0c */
  64         {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
  65         /*0d */
  66         {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
  67         /*0e */
  68         {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
  69         /*0f */
  70         {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
  71         /*10 */
  72         {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
  73         /*11 */
  74         {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
  75         /*12 */
  76         {_CDWORD, offsetof(_cmsg, CIPmask)},
  77         /*13 */
  78         {_CDWORD, offsetof(_cmsg, CIPmask2)},
  79         /*14 */
  80         {_CWORD, offsetof(_cmsg, CIPValue)},
  81         /*15 */
  82         {_CDWORD, offsetof(_cmsg, Class)},
  83         /*16 */
  84         {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
  85         /*17 */
  86         {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
  87         /*18 */
  88         {_CDWORD, offsetof(_cmsg, Data)},
  89         /*19 */
  90         {_CWORD, offsetof(_cmsg, DataHandle)},
  91         /*1a */
  92         {_CWORD, offsetof(_cmsg, DataLength)},
  93         /*1b */
  94         {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
  95         /*1c */
  96         {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
  97         /*1d */
  98         {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
  99         /*1e */
 100         {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
 101         /*1f */
 102         {_CWORD, offsetof(_cmsg, FacilitySelector)},
 103         /*20 */
 104         {_CWORD, offsetof(_cmsg, Flags)},
 105         /*21 */
 106         {_CDWORD, offsetof(_cmsg, Function)},
 107         /*22 */
 108         {_CSTRUCT, offsetof(_cmsg, HLC)},
 109         /*23 */
 110         {_CWORD, offsetof(_cmsg, Info)},
 111         /*24 */
 112         {_CSTRUCT, offsetof(_cmsg, InfoElement)},
 113         /*25 */
 114         {_CDWORD, offsetof(_cmsg, InfoMask)},
 115         /*26 */
 116         {_CWORD, offsetof(_cmsg, InfoNumber)},
 117         /*27 */
 118         {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
 119         /*28 */
 120         {_CSTRUCT, offsetof(_cmsg, LLC)},
 121         /*29 */
 122         {_CSTRUCT, offsetof(_cmsg, ManuData)},
 123         /*2a */
 124         {_CDWORD, offsetof(_cmsg, ManuID)},
 125         /*2b */
 126         {_CSTRUCT, offsetof(_cmsg, NCPI)},
 127         /*2c */
 128         {_CWORD, offsetof(_cmsg, Reason)},
 129         /*2d */
 130         {_CWORD, offsetof(_cmsg, Reason_B3)},
 131         /*2e */
 132         {_CWORD, offsetof(_cmsg, Reject)},
 133         /*2f */
 134         {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
 135 };
 136
 137 static unsigned char *cpars[] =
 138 {
 139         /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
 140         /* CONNECT_REQ */ [0x02] = "\x03\x14\x0e\x10\x0f\x11\x0d\x06\x08\x0a\x05\x07\x09\x01\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
 141         /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
 142         /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
 143         /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
 144         /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
 145         /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
 146         /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
 147         /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
 148         /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
 149         /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
 150         /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
 151         /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
 152         /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
 153         /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
 154         /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
 155         /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
 156         /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
 157         /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
 158         /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
 159         /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
 160         /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
 161         /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
 162         /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
 163         /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
 164         /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
 165         /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
 166         /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
 167         /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
 168         /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
 169         /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
 170         /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
 171         /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
 172         /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
 173         /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
 174         /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
 175         /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
 176         /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
 177         /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
 178         /* INFO_RESP */ [0x3e] = "\x03\x01",
 179         /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
 180         /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
 181         /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
 182         /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
 183         /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
 184         /* RESET_B3_RESP */ [0x46] = "\x03\x01",
 185         /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
 186         /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
 187 };
 188
 189 /*-------------------------------------------------------*/
 190
 191 #define byteTLcpy(x, y)         *(u8 *)(x) = *(u8 *)(y);
 192 #define wordTLcpy(x, y)         *(u16 *)(x) = *(u16 *)(y);
 193 #define dwordTLcpy(x, y)        memcpy(x, y, 4);
 194 #define structTLcpy(x, y, l)    memcpy(x, y, l)
 195 #define structTLcpyovl(x, y, l) memmove(x, y, l)
 196
 197 #define byteTRcpy(x, y)         *(u8 *)(y) = *(u8 *)(x);
 198 #define wordTRcpy(x, y)         *(u16 *)(y) = *(u16 *)(x);
 199 #define dwordTRcpy(x, y)        memcpy(y, x, 4);
 200 #define structTRcpy(x, y, l)    memcpy(y, x, l)
 201 #define structTRcpyovl(x, y, l) memmove(y, x, l)
 202
 203 /*-------------------------------------------------------*/
 204 static unsigned command_2_index(unsigned c, unsigned sc)
 205 {
 206         if (c & 0x80)
 207                 c = 0x9 + (c & 0x0f);
 208         else if (c <= 0x0f);
 209         else if (c == 0x41)
 210                 c = 0x9 + 0x1;
 211         else if (c == 0xff)
 212                 c = 0x00;
 213         return (sc & 3) * (0x9 + 0x9) + c;
 214 }
 215
 216 /*-------------------------------------------------------*/
 217 #define TYP (cdef[cmsg->par[cmsg->p]].typ)
 218 #define OFF (((u8 *)cmsg) + cdef[cmsg->par[cmsg->p]].off)
 219
 220 static void jumpcstruct(_cmsg *cmsg)
 221 {
 222         unsigned layer;
 223         for (cmsg->p++, layer = 1; layer;) {
 224                 /* $$$$$ assert (cmsg->p); */
 225                 cmsg->p++;
 226                 switch (TYP) {
 227                 case _CMSTRUCT:
 228                         layer++;
 229                         break;
 230                 case _CEND:
 231                         layer--;
 232                         break;
 233                 }
 234         }
 235 }
 236 /*-------------------------------------------------------*/
 237 static void pars_2_message(_cmsg *cmsg)
 238 {
 239
 240         for (; TYP != _CEND; cmsg->p++) {
 241                 switch (TYP) {
 242                 case _CBYTE:
 243                         byteTLcpy(cmsg->m + cmsg->l, OFF);
 244                         cmsg->l++;
 245                         break;
 246                 case _CWORD:
 247                         wordTLcpy(cmsg->m + cmsg->l, OFF);
 248                         cmsg->l += 2;
 249                         break;
 250                 case _CDWORD:
 251                         dwordTLcpy(cmsg->m + cmsg->l, OFF);
 252                         cmsg->l += 4;
 253                         break;
 254                 case _CSTRUCT:
 255                         if (*(u8 **) OFF == NULL) {
 256                                 *(cmsg->m + cmsg->l) = '\0';
 257                                 cmsg->l++;
 258                         } else if (**(_cstruct *) OFF != 0xff) {
 259                                 structTLcpy(cmsg->m + cmsg->l, *(_cstruct *) OFF, 1 + **(_cstruct *) OFF);
 260                                 cmsg->l += 1 + **(_cstruct *) OFF;
 261                         } else {
 262                                 _cstruct s = *(_cstruct *) OFF;
 263                                 structTLcpy(cmsg->m + cmsg->l, s, 3 + *(u16 *) (s + 1));
 264                                 cmsg->l += 3 + *(u16 *) (s + 1);
 265                         }
 266                         break;
 267                 case _CMSTRUCT:
 268 /*----- Metastruktur 0 -----*/
 269                         if (*(_cmstruct *) OFF == CAPI_DEFAULT) {
 270                                 *(cmsg->m + cmsg->l) = '\0';
 271                                 cmsg->l++;
 272                                 jumpcstruct(cmsg);
 273                         }
 274 /*----- Metastruktur wird composed -----*/
 275                         else {
 276                                 unsigned _l = cmsg->l;
 277                                 unsigned _ls;
 278                                 cmsg->l++;
 279                                 cmsg->p++;
 280                                 pars_2_message(cmsg);
 281                                 _ls = cmsg->l - _l - 1;
 282                                 if (_ls < 255)
 283                                         (cmsg->m + _l)[0] = (u8) _ls;
 284                                 else {
 285                                         structTLcpyovl(cmsg->m + _l + 3, cmsg->m + _l + 1, _ls);
 286                                         (cmsg->m + _l)[0] = 0xff;
 287                                         wordTLcpy(cmsg->m + _l + 1, &_ls);
 288                                 }
 289                         }
 290                         break;
 291                 }
 292         }
 293 }
 294
 295 /**
 296  * capi_cmsg2message() - assemble CAPI 2.0 message from _cmsg structure
 297  * @cmsg:       _cmsg structure
 298  * @msg:        buffer for assembled message
 299  *
 300  * Return value: 0 for success
 301  */
 302
 303 unsigned capi_cmsg2message(_cmsg *cmsg, u8 *msg)
 304 {
 305         cmsg->m = msg;
 306         cmsg->l = 8;
 307         cmsg->p = 0;
 308         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 309
 310         pars_2_message(cmsg);
 311
 312         wordTLcpy(msg + 0, &cmsg->l);
 313         byteTLcpy(cmsg->m + 4, &cmsg->Command);
 314         byteTLcpy(cmsg->m + 5, &cmsg->Subcommand);
 315         wordTLcpy(cmsg->m + 2, &cmsg->ApplId);
 316         wordTLcpy(cmsg->m + 6, &cmsg->Messagenumber);
 317
 318         return 0;
 319 }
 320
 321 /*-------------------------------------------------------*/
 322 static void message_2_pars(_cmsg *cmsg)
 323 {
 324         for (; TYP != _CEND; cmsg->p++) {
 325
 326                 switch (TYP) {
 327                 case _CBYTE:
 328                         byteTRcpy(cmsg->m + cmsg->l, OFF);
 329                         cmsg->l++;
 330                         break;
 331                 case _CWORD:
 332                         wordTRcpy(cmsg->m + cmsg->l, OFF);
 333                         cmsg->l += 2;
 334                         break;
 335                 case _CDWORD:
 336                         dwordTRcpy(cmsg->m + cmsg->l, OFF);
 337                         cmsg->l += 4;
 338                         break;
 339                 case _CSTRUCT:
 340                         *(u8 **) OFF = cmsg->m + cmsg->l;
 341
 342                         if (cmsg->m[cmsg->l] != 0xff)
 343                                 cmsg->l += 1 + cmsg->m[cmsg->l];
 344                         else
 345                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
 346                         break;
 347                 case _CMSTRUCT:
 348 /*----- Metastruktur 0 -----*/
 349                         if (cmsg->m[cmsg->l] == '\0') {
 350                                 *(_cmstruct *) OFF = CAPI_DEFAULT;
 351                                 cmsg->l++;
 352                                 jumpcstruct(cmsg);
 353                         } else {
 354                                 unsigned _l = cmsg->l;
 355                                 *(_cmstruct *) OFF = CAPI_COMPOSE;
 356                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
 357                                 cmsg->p++;
 358                                 message_2_pars(cmsg);
 359                         }
 360                         break;
 361                 }
 362         }
 363 }
 364
 365 /**
 366  * capi_message2cmsg() - disassemble CAPI 2.0 message into _cmsg structure
 367  * @cmsg:       _cmsg structure
 368  * @msg:        buffer for assembled message
 369  *
 370  * Return value: 0 for success
 371  */
 372
 373 unsigned capi_message2cmsg(_cmsg *cmsg, u8 *msg)
 374 {
 375         memset(cmsg, 0, sizeof(_cmsg));
 376         cmsg->m = msg;
 377         cmsg->l = 8;
 378         cmsg->p = 0;
 379         byteTRcpy(cmsg->m + 4, &cmsg->Command);
 380         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
 381         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 382
 383         message_2_pars(cmsg);
 384
 385         wordTRcpy(msg + 0, &cmsg->l);
 386         wordTRcpy(cmsg->m + 2, &cmsg->ApplId);
 387         wordTRcpy(cmsg->m + 6, &cmsg->Messagenumber);
 388
 389         return 0;
 390 }
 391
 392 /**
 393  * capi_cmsg_header() - initialize header part of _cmsg structure
 394  * @cmsg:       _cmsg structure
 395  * @_ApplId:    ApplID field value
 396  * @_Command:   Command field value
 397  * @_Subcommand:        Subcommand field value
 398  * @_Messagenumber:     Message Number field value
 399  * @_Controller:        Controller/PLCI/NCCI field value
 400  *
 401  * Return value: 0 for success
 402  */
 403
 404 unsigned capi_cmsg_header(_cmsg *cmsg, u16 _ApplId,
 405                           u8 _Command, u8 _Subcommand,
 406                           u16 _Messagenumber, u32 _Controller)
 407 {
 408         memset(cmsg, 0, sizeof(_cmsg));
 409         cmsg->ApplId = _ApplId;
 410         cmsg->Command = _Command;
 411         cmsg->Subcommand = _Subcommand;
 412         cmsg->Messagenumber = _Messagenumber;
 413         cmsg->adr.adrController = _Controller;
 414         return 0;
 415 }
 416
 417 /*-------------------------------------------------------*/
 418
 419 static char *mnames[] =
 420 {
 421         [0x01] = "ALERT_REQ",
 422         [0x02] = "CONNECT_REQ",
 423         [0x04] = "DISCONNECT_REQ",
 424         [0x05] = "LISTEN_REQ",
 425         [0x08] = "INFO_REQ",
 426         [0x09] = "FACILITY_REQ",
 427         [0x0a] = "SELECT_B_PROTOCOL_REQ",
 428         [0x0b] = "CONNECT_B3_REQ",
 429         [0x0d] = "DISCONNECT_B3_REQ",
 430         [0x0f] = "DATA_B3_REQ",
 431         [0x10] = "RESET_B3_REQ",
 432         [0x13] = "ALERT_CONF",
 433         [0x14] = "CONNECT_CONF",
 434         [0x16] = "DISCONNECT_CONF",
 435         [0x17] = "LISTEN_CONF",
 436         [0x18] = "MANUFACTURER_REQ",
 437         [0x1a] = "INFO_CONF",
 438         [0x1b] = "FACILITY_CONF",
 439         [0x1c] = "SELECT_B_PROTOCOL_CONF",
 440         [0x1d] = "CONNECT_B3_CONF",
 441         [0x1f] = "DISCONNECT_B3_CONF",
 442         [0x21] = "DATA_B3_CONF",
 443         [0x22] = "RESET_B3_CONF",
 444         [0x26] = "CONNECT_IND",
 445         [0x27] = "CONNECT_ACTIVE_IND",
 446         [0x28] = "DISCONNECT_IND",
 447         [0x2a] = "MANUFACTURER_CONF",
 448         [0x2c] = "INFO_IND",
 449         [0x2d] = "FACILITY_IND",
 450         [0x2f] = "CONNECT_B3_IND",
 451         [0x30] = "CONNECT_B3_ACTIVE_IND",
 452         [0x31] = "DISCONNECT_B3_IND",
 453         [0x33] = "DATA_B3_IND",
 454         [0x34] = "RESET_B3_IND",
 455         [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
 456         [0x38] = "CONNECT_RESP",
 457         [0x39] = "CONNECT_ACTIVE_RESP",
 458         [0x3a] = "DISCONNECT_RESP",
 459         [0x3c] = "MANUFACTURER_IND",
 460         [0x3e] = "INFO_RESP",
 461         [0x3f] = "FACILITY_RESP",
 462         [0x41] = "CONNECT_B3_RESP",
 463         [0x42] = "CONNECT_B3_ACTIVE_RESP",
 464         [0x43] = "DISCONNECT_B3_RESP",
 465         [0x45] = "DATA_B3_RESP",
 466         [0x46] = "RESET_B3_RESP",
 467         [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
 468         [0x4e] = "MANUFACTURER_RESP"
 469 };
 470
 471 /**
 472  * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
 473  * @cmd:        command number
 474  * @subcmd:     subcommand number
 475  *
 476  * Return value: static string, NULL if command/subcommand unknown
 477  */
 478
 479 char *capi_cmd2str(u8 cmd, u8 subcmd)
 480 {
 481         return mnames[command_2_index(cmd, subcmd)];
 482 }
 483
 484
 485 /*-------------------------------------------------------*/
 486
 487 #ifdef CONFIG_CAPI_TRACE
 488
 489 /*-------------------------------------------------------*/
 490
 491 static char *pnames[] =
 492 {
 493         /*00 */ NULL,
 494         /*01 */ NULL,
 495         /*02 */ NULL,
 496         /*03 */ "Controller/PLCI/NCCI",
 497         /*04 */ "AdditionalInfo",
 498         /*05 */ "B1configuration",
 499         /*06 */ "B1protocol",
 500         /*07 */ "B2configuration",
 501         /*08 */ "B2protocol",
 502         /*09 */ "B3configuration",
 503         /*0a */ "B3protocol",
 504         /*0b */ "BC",
 505         /*0c */ "BChannelinformation",
 506         /*0d */ "BProtocol",
 507         /*0e */ "CalledPartyNumber",
 508         /*0f */ "CalledPartySubaddress",
 509         /*10 */ "CallingPartyNumber",
 510         /*11 */ "CallingPartySubaddress",
 511         /*12 */ "CIPmask",
 512         /*13 */ "CIPmask2",
 513         /*14 */ "CIPValue",
 514         /*15 */ "Class",
 515         /*16 */ "ConnectedNumber",
 516         /*17 */ "ConnectedSubaddress",
 517         /*18 */ "Data32",
 518         /*19 */ "DataHandle",
 519         /*1a */ "DataLength",
 520         /*1b */ "FacilityConfirmationParameter",
 521         /*1c */ "Facilitydataarray",
 522         /*1d */ "FacilityIndicationParameter",
 523         /*1e */ "FacilityRequestParameter",
 524         /*1f */ "FacilitySelector",
 525         /*20 */ "Flags",
 526         /*21 */ "Function",
 527         /*22 */ "HLC",
 528         /*23 */ "Info",
 529         /*24 */ "InfoElement",
 530         /*25 */ "InfoMask",
 531         /*26 */ "InfoNumber",
 532         /*27 */ "Keypadfacility",
 533         /*28 */ "LLC",
 534         /*29 */ "ManuData",
 535         /*2a */ "ManuID",
 536         /*2b */ "NCPI",
 537         /*2c */ "Reason",
 538         /*2d */ "Reason_B3",
 539         /*2e */ "Reject",
 540         /*2f */ "Useruserdata"
 541 };
 542
 543
 544
 545 #include <stdarg.h>
 546
 547 /*-------------------------------------------------------*/
 548 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt, ...)
 549 {
 550         va_list f;
 551         size_t n, r;
 552
 553         if (!cdb)
 554                 return NULL;
 555         va_start(f, fmt);
 556         r = cdb->size - cdb->pos;
 557         n = vsnprintf(cdb->p, r, fmt, f);
 558         va_end(f);
 559         if (n >= r) {
 560                 /* truncated, need bigger buffer */
 561                 size_t ns = 2 * cdb->size;
 562                 u_char *nb;
 563
 564                 while ((ns - cdb->pos) <= n)
 565                         ns *= 2;
 566                 nb = kmalloc(ns, GFP_ATOMIC);
 567                 if (!nb) {
 568                         cdebbuf_free(cdb);
 569                         return NULL;
 570                 }
 571                 memcpy(nb, cdb->buf, cdb->pos);
 572                 kfree(cdb->buf);
 573                 nb[cdb->pos] = 0;
 574                 cdb->buf = nb;
 575                 cdb->p = cdb->buf + cdb->pos;
 576                 cdb->size = ns;
 577                 va_start(f, fmt);
 578                 r = cdb->size - cdb->pos;
 579                 n = vsnprintf(cdb->p, r, fmt, f);
 580                 va_end(f);
 581         }
 582         cdb->p += n;
 583         cdb->pos += n;
 584         return cdb;
 585 }
 586
 587 static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 *m, unsigned len)
 588 {
 589         unsigned hex = 0;
 590
 591         if (!cdb)
 592                 return NULL;
 593         for (; len; len--, m++)
 594                 if (isalnum(*m) || *m == ' ') {
 595                         if (hex)
 596                                 cdb = bufprint(cdb, ">");
 597                         cdb = bufprint(cdb, "%c", *m);
 598                         hex = 0;
 599                 } else {
 600                         if (!hex)
 601                                 cdb = bufprint(cdb, "<%02x", *m);
 602                         else
 603                                 cdb = bufprint(cdb, " %02x", *m);
 604                         hex = 1;
 605                 }
 606         if (hex)
 607                 cdb = bufprint(cdb, ">");
 608         return cdb;
 609 }
 610
 611 static _cdebbuf *printstruct(_cdebbuf *cdb, u8 *m)
 612 {
 613         unsigned len;
 614
 615         if (m[0] != 0xff) {
 616                 len = m[0];
 617                 m += 1;
 618         } else {
 619                 len = ((u16 *) (m + 1))[0];
 620                 m += 3;
 621         }
 622         cdb = printstructlen(cdb, m, len);
 623         return cdb;
 624 }
 625
 626 /*-------------------------------------------------------*/
 627 #define NAME (pnames[cmsg->par[cmsg->p]])
 628
 629 static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
 630 {
 631         for (; TYP != _CEND; cmsg->p++) {
 632                 int slen = 29 + 3 - level;
 633                 int i;
 634
 635                 if (!cdb)
 636                         return NULL;
 637                 cdb = bufprint(cdb, "  ");
 638                 for (i = 0; i < level - 1; i++)
 639                         cdb = bufprint(cdb, " ");
 640
 641                 switch (TYP) {
 642                 case _CBYTE:
 643                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
 644                         cmsg->l++;
 645                         break;
 646                 case _CWORD:
 647                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
 648                         cmsg->l += 2;
 649                         break;
 650                 case _CDWORD:
 651                         cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
 652                         cmsg->l += 4;
 653                         break;
 654                 case _CSTRUCT:
 655                         cdb = bufprint(cdb, "%-*s = ", slen, NAME);
 656                         if (cmsg->m[cmsg->l] == '\0')
 657                                 cdb = bufprint(cdb, "default");
 658                         else
 659                                 cdb = printstruct(cdb, cmsg->m + cmsg->l);
 660                         cdb = bufprint(cdb, "\n");
 661                         if (cmsg->m[cmsg->l] != 0xff)
 662                                 cmsg->l += 1 + cmsg->m[cmsg->l];
 663                         else
 664                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
 665
 666                         break;
 667
 668                 case _CMSTRUCT:
 669 /*----- Metastruktur 0 -----*/
 670                         if (cmsg->m[cmsg->l] == '\0') {
 671                                 cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
 672                                 cmsg->l++;
 673                                 jumpcstruct(cmsg);
 674                         } else {
 675                                 char *name = NAME;
 676                                 unsigned _l = cmsg->l;
 677                                 cdb = bufprint(cdb, "%-*s\n", slen, name);
 678                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
 679                                 cmsg->p++;
 680                                 cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
 681                         }
 682                         break;
 683                 }
 684         }
 685         return cdb;
 686 }
 687 /*-------------------------------------------------------*/
 688
 689 static _cdebbuf *g_debbuf;
 690 static u_long g_debbuf_lock;
 691 static _cmsg *g_cmsg;
 692
 693 static _cdebbuf *cdebbuf_alloc(void)
 694 {
 695         _cdebbuf *cdb;
 696
 697         if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
 698                 cdb = g_debbuf;
 699                 goto init;
 700         } else
 701                 cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
 702         if (!cdb)
 703                 return NULL;
 704         cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
 705         if (!cdb->buf) {
 706                 kfree(cdb);
 707                 return NULL;
 708         }
 709         cdb->size = CDEBUG_SIZE;
 710 init:
 711         cdb->buf[0] = 0;
 712         cdb->p = cdb->buf;
 713         cdb->pos = 0;
 714         return cdb;
 715 }
 716
 717 /**
 718  * cdebbuf_free() - free CAPI debug buffer
 719  * @cdb:        buffer to free
 720  */
 721
 722 void cdebbuf_free(_cdebbuf *cdb)
 723 {
 724         if (likely(cdb == g_debbuf)) {
 725                 test_and_clear_bit(1, &g_debbuf_lock);
 726                 return;
 727         }
 728         if (likely(cdb))
 729                 kfree(cdb->buf);
 730         kfree(cdb);
 731 }
 732
 733
 734 /**
 735  * capi_message2str() - format CAPI 2.0 message for printing
 736  * @msg:        CAPI 2.0 message
 737  *
 738  * Allocates a CAPI debug buffer and fills it with a printable representation
 739  * of the CAPI 2.0 message in @msg.
 740  * Return value: allocated debug buffer, NULL on error
 741  * The returned buffer should be freed by a call to cdebbuf_free() after use.
 742  */
 743
 744 _cdebbuf *capi_message2str(u8 *msg)
 745 {
 746         _cdebbuf *cdb;
 747         _cmsg   *cmsg;
 748
 749         cdb = cdebbuf_alloc();
 750         if (unlikely(!cdb))
 751                 return NULL;
 752         if (likely(cdb == g_debbuf))
 753                 cmsg = g_cmsg;
 754         else
 755                 cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
 756         if (unlikely(!cmsg)) {
 757                 cdebbuf_free(cdb);
 758                 return NULL;
 759         }
 760         cmsg->m = msg;
 761         cmsg->l = 8;
 762         cmsg->p = 0;
 763         byteTRcpy(cmsg->m + 4, &cmsg->Command);
 764         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
 765         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 766
 767         cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
 768                        mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
 769                        ((unsigned short *) msg)[1],
 770                        ((unsigned short *) msg)[3],
 771                        ((unsigned short *) msg)[0]);
 772
 773         cdb = protocol_message_2_pars(cdb, cmsg, 1);
 774         if (unlikely(cmsg != g_cmsg))
 775                 kfree(cmsg);
 776         return cdb;
 777 }
 778
 779 /**
 780  * capi_cmsg2str() - format _cmsg structure for printing
 781  * @cmsg:       _cmsg structure
 782  *
 783  * Allocates a CAPI debug buffer and fills it with a printable representation
 784  * of the CAPI 2.0 message stored in @cmsg by a previous call to
 785  * capi_cmsg2message() or capi_message2cmsg().
 786  * Return value: allocated debug buffer, NULL on error
 787  * The returned buffer should be freed by a call to cdebbuf_free() after use.
 788  */
 789
 790 _cdebbuf *capi_cmsg2str(_cmsg *cmsg)
 791 {
 792         _cdebbuf *cdb;
 793
 794         if (!cmsg->m)
 795                 return NULL;    /* no message */
 796         cdb = cdebbuf_alloc();
 797         if (!cdb)
 798                 return NULL;
 799         cmsg->l = 8;
 800         cmsg->p = 0;
 801         cdb = bufprint(cdb, "%s ID=%03d #0x%04x LEN=%04d\n",
 802                        mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
 803                        ((u16 *) cmsg->m)[1],
 804                        ((u16 *) cmsg->m)[3],
 805                        ((u16 *) cmsg->m)[0]);
 806         cdb = protocol_message_2_pars(cdb, cmsg, 1);
 807         return cdb;
 808 }
 809
 810 int __init cdebug_init(void)
 811 {
 812         g_cmsg = kmalloc(sizeof(_cmsg), GFP_KERNEL);
 813         if (!g_cmsg)
 814                 return -ENOMEM;
 815         g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
 816         if (!g_debbuf) {
 817                 kfree(g_cmsg);
 818                 return -ENOMEM;
 819         }
 820         g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
 821         if (!g_debbuf->buf) {
 822                 kfree(g_cmsg);
 823                 kfree(g_debbuf);
 824                 return -ENOMEM;
 825         }
 826         g_debbuf->size = CDEBUG_GSIZE;
 827         g_debbuf->buf[0] = 0;
 828         g_debbuf->p = g_debbuf->buf;
 829         g_debbuf->pos = 0;
 830         return 0;
 831 }
 832
 833 void __exit cdebug_exit(void)
 834 {
 835         if (g_debbuf)
 836                 kfree(g_debbuf->buf);
 837         kfree(g_debbuf);
 838         kfree(g_cmsg);
 839 }
 840
 841 #else /* !CONFIG_CAPI_TRACE */
 842
 843 static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
 844
 845 _cdebbuf *capi_message2str(u8 *msg)
 846 {
 847         return &g_debbuf;
 848 }
 849
 850 _cdebbuf *capi_cmsg2str(_cmsg *cmsg)
 851 {
 852         return &g_debbuf;
 853 }
 854
 855 void cdebbuf_free(_cdebbuf *cdb)
 856 {
 857 }
 858
 859 int __init cdebug_init(void)
 860 {
 861         return 0;
 862 }
 863
 864 void __exit cdebug_exit(void)
 865 {
 866 }
 867
 868 #endif
 869
 870 EXPORT_SYMBOL(cdebbuf_free);
 871 EXPORT_SYMBOL(capi_cmsg2message);
 872 EXPORT_SYMBOL(capi_message2cmsg);
 873 EXPORT_SYMBOL(capi_cmsg_header);
 874 EXPORT_SYMBOL(capi_cmd2str);
 875 EXPORT_SYMBOL(capi_cmsg2str);
 876 EXPORT_SYMBOL(capi_message2str);