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 #ifndef CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON
  26 char *capi_info2str(u16 reason)
  27 {
  28     return "..";
  29 }
  30 #else
  31 char *capi_info2str(u16 reason)
  32 {
  33     switch (reason) {
  34
  35 /*-- informative values (corresponding message was processed) -----*/
  36         case 0x0001:
  37            return "NCPI not supported by current protocol, NCPI ignored";
  38         case 0x0002:
  39            return "Flags not supported by current protocol, flags ignored";
  40         case 0x0003:
  41            return "Alert already sent by another application";
  42
  43 /*-- error information concerning CAPI_REGISTER -----*/
  44         case 0x1001:
  45            return "Too many applications";
  46         case 0x1002:
  47            return "Logical block size too small, must be at least 128 Bytes";
  48         case 0x1003:
  49            return "Buffer exceeds 64 kByte";
  50         case 0x1004:
  51            return "Message buffer size too small, must be at least 1024 Bytes";
  52         case 0x1005:
  53            return "Max. number of logical connections not supported";
  54         case 0x1006:
  55            return "Reserved";
  56         case 0x1007:
  57            return "The message could not be accepted because of an internal busy condition";
  58         case 0x1008:
  59            return "OS resource error (no memory ?)";
  60         case 0x1009:
  61            return "CAPI not installed";
  62         case 0x100A:
  63            return "Controller does not support external equipment";
  64         case 0x100B:
  65            return "Controller does only support external equipment";
  66
  67 /*-- error information concerning message exchange functions -----*/
  68         case 0x1101:
  69            return "Illegal application number";
  70         case 0x1102:
  71            return "Illegal command or subcommand or message length less than 12 bytes";
  72         case 0x1103:
  73            return "The message could not be accepted because of a queue full condition !! The error code does not imply that CAPI cannot receive messages directed to another controller, PLCI or NCCI";
  74         case 0x1104:
  75            return "Queue is empty";
  76         case 0x1105:
  77            return "Queue overflow, a message was lost !! This indicates a configuration error. The only recovery from this error is to perform a CAPI_RELEASE";
  78         case 0x1106:
  79            return "Unknown notification parameter";
  80         case 0x1107:
  81            return "The Message could not be accepted because of an internal busy condition";
  82         case 0x1108:
  83            return "OS Resource error (no memory ?)";
  84         case 0x1109:
  85            return "CAPI not installed";
  86         case 0x110A:
  87            return "Controller does not support external equipment";
  88         case 0x110B:
  89            return "Controller does only support external equipment";
  90
  91 /*-- error information concerning resource / coding problems -----*/
  92         case 0x2001:
  93            return "Message not supported in current state";
  94         case 0x2002:
  95            return "Illegal Controller / PLCI / NCCI";
  96         case 0x2003:
  97            return "Out of PLCI";
  98         case 0x2004:
  99            return "Out of NCCI";
 100         case 0x2005:
 101            return "Out of LISTEN";
 102         case 0x2006:
 103            return "Out of FAX resources (protocol T.30)";
 104         case 0x2007:
 105            return "Illegal message parameter coding";
 106
 107 /*-- error information concerning requested services  -----*/
 108         case 0x3001:
 109            return "B1 protocol not supported";
 110         case 0x3002:
 111            return "B2 protocol not supported";
 112         case 0x3003:
 113            return "B3 protocol not supported";
 114         case 0x3004:
 115            return "B1 protocol parameter not supported";
 116         case 0x3005:
 117            return "B2 protocol parameter not supported";
 118         case 0x3006:
 119            return "B3 protocol parameter not supported";
 120         case 0x3007:
 121            return "B protocol combination not supported";
 122         case 0x3008:
 123            return "NCPI not supported";
 124         case 0x3009:
 125            return "CIP Value unknown";
 126         case 0x300A:
 127            return "Flags not supported (reserved bits)";
 128         case 0x300B:
 129            return "Facility not supported";
 130         case 0x300C:
 131            return "Data length not supported by current protocol";
 132         case 0x300D:
 133            return "Reset procedure not supported by current protocol";
 134
 135 /*-- informations about the clearing of a physical connection -----*/
 136         case 0x3301:
 137            return "Protocol error layer 1 (broken line or B-channel removed by signalling protocol)";
 138         case 0x3302:
 139            return "Protocol error layer 2";
 140         case 0x3303:
 141            return "Protocol error layer 3";
 142         case 0x3304:
 143            return "Another application got that call";
 144 /*-- T.30 specific reasons -----*/
 145         case 0x3311:
 146            return "Connecting not successful (remote station is no FAX G3 machine)";
 147         case 0x3312:
 148            return "Connecting not successful (training error)";
 149         case 0x3313:
 150            return "Disconnected before transfer (remote station does not support transfer mode, e.g. resolution)";
 151         case 0x3314:
 152            return "Disconnected during transfer (remote abort)";
 153         case 0x3315:
 154            return "Disconnected during transfer (remote procedure error, e.g. unsuccessful repetition of T.30 commands)";
 155         case 0x3316:
 156            return "Disconnected during transfer (local tx data underrun)";
 157         case 0x3317:
 158            return "Disconnected during transfer (local rx data overflow)";
 159         case 0x3318:
 160            return "Disconnected during transfer (local abort)";
 161         case 0x3319:
 162            return "Illegal parameter coding (e.g. SFF coding error)";
 163
 164 /*-- disconnect causes from the network according to ETS 300 102-1/Q.931 -----*/
 165         case 0x3481: return "Unallocated (unassigned) number";
 166         case 0x3482: return "No route to specified transit network";
 167         case 0x3483: return "No route to destination";
 168         case 0x3486: return "Channel unacceptable";
 169         case 0x3487:
 170            return "Call awarded and being delivered in an established channel";
 171         case 0x3490: return "Normal call clearing";
 172         case 0x3491: return "User busy";
 173         case 0x3492: return "No user responding";
 174         case 0x3493: return "No answer from user (user alerted)";
 175         case 0x3495: return "Call rejected";
 176         case 0x3496: return "Number changed";
 177         case 0x349A: return "Non-selected user clearing";
 178         case 0x349B: return "Destination out of order";
 179         case 0x349C: return "Invalid number format";
 180         case 0x349D: return "Facility rejected";
 181         case 0x349E: return "Response to STATUS ENQUIRY";
 182         case 0x349F: return "Normal, unspecified";
 183         case 0x34A2: return "No circuit / channel available";
 184         case 0x34A6: return "Network out of order";
 185         case 0x34A9: return "Temporary failure";
 186         case 0x34AA: return "Switching equipment congestion";
 187         case 0x34AB: return "Access information discarded";
 188         case 0x34AC: return "Requested circuit / channel not available";
 189         case 0x34AF: return "Resources unavailable, unspecified";
 190         case 0x34B1: return "Quality of service unavailable";
 191         case 0x34B2: return "Requested facility not subscribed";
 192         case 0x34B9: return "Bearer capability not authorized";
 193         case 0x34BA: return "Bearer capability not presently available";
 194         case 0x34BF: return "Service or option not available, unspecified";
 195         case 0x34C1: return "Bearer capability not implemented";
 196         case 0x34C2: return "Channel type not implemented";
 197         case 0x34C5: return "Requested facility not implemented";
 198         case 0x34C6: return "Only restricted digital information bearer capability is available";
 199         case 0x34CF: return "Service or option not implemented, unspecified";
 200         case 0x34D1: return "Invalid call reference value";
 201         case 0x34D2: return "Identified channel does not exist";
 202         case 0x34D3: return "A suspended call exists, but this call identity does not";
 203         case 0x34D4: return "Call identity in use";
 204         case 0x34D5: return "No call suspended";
 205         case 0x34D6: return "Call having the requested call identity has been cleared";
 206         case 0x34D8: return "Incompatible destination";
 207         case 0x34DB: return "Invalid transit network selection";
 208         case 0x34DF: return "Invalid message, unspecified";
 209         case 0x34E0: return "Mandatory information element is missing";
 210         case 0x34E1: return "Message type non-existent or not implemented";
 211         case 0x34E2: return "Message not compatible with call state or message type non-existent or not implemented";
 212         case 0x34E3: return "Information element non-existent or not implemented";
 213         case 0x34E4: return "Invalid information element contents";
 214         case 0x34E5: return "Message not compatible with call state";
 215         case 0x34E6: return "Recovery on timer expiry";
 216         case 0x34EF: return "Protocol error, unspecified";
 217         case 0x34FF: return "Interworking, unspecified";
 218
 219         default: return "No additional information";
 220     }
 221 }
 222 #endif
 223
 224 typedef struct {
 225         int typ;
 226         size_t off;
 227 } _cdef;
 228
 229 #define _CBYTE         1
 230 #define _CWORD         2
 231 #define _CDWORD        3
 232 #define _CSTRUCT       4
 233 #define _CMSTRUCT      5
 234 #define _CEND          6
 235
 236 static _cdef cdef[] =
 237 {
 238     /*00 */
 239  {_CEND},
 240     /*01 */
 241  {_CEND},
 242     /*02 */
 243  {_CEND},
 244     /*03 */
 245  {_CDWORD, offsetof(_cmsg, adr.adrController)},
 246     /*04 */
 247  {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
 248     /*05 */
 249  {_CSTRUCT, offsetof(_cmsg, B1configuration)},
 250     /*06 */
 251  {_CWORD, offsetof(_cmsg, B1protocol)},
 252     /*07 */
 253  {_CSTRUCT, offsetof(_cmsg, B2configuration)},
 254     /*08 */
 255  {_CWORD, offsetof(_cmsg, B2protocol)},
 256     /*09 */
 257  {_CSTRUCT, offsetof(_cmsg, B3configuration)},
 258     /*0a */
 259  {_CWORD, offsetof(_cmsg, B3protocol)},
 260     /*0b */
 261  {_CSTRUCT, offsetof(_cmsg, BC)},
 262     /*0c */
 263  {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
 264     /*0d */
 265  {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
 266     /*0e */
 267  {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
 268     /*0f */
 269  {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
 270     /*10 */
 271  {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
 272     /*11 */
 273  {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
 274     /*12 */
 275  {_CDWORD, offsetof(_cmsg, CIPmask)},
 276     /*13 */
 277  {_CDWORD, offsetof(_cmsg, CIPmask2)},
 278     /*14 */
 279  {_CWORD, offsetof(_cmsg, CIPValue)},
 280     /*15 */
 281  {_CDWORD, offsetof(_cmsg, Class)},
 282     /*16 */
 283  {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
 284     /*17 */
 285  {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
 286     /*18 */
 287  {_CDWORD, offsetof(_cmsg, Data)},
 288     /*19 */
 289  {_CWORD, offsetof(_cmsg, DataHandle)},
 290     /*1a */
 291  {_CWORD, offsetof(_cmsg, DataLength)},
 292     /*1b */
 293  {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
 294     /*1c */
 295  {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
 296     /*1d */
 297  {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
 298     /*1e */
 299  {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
 300     /*1f */
 301  {_CWORD, offsetof(_cmsg, FacilitySelector)},
 302     /*20 */
 303  {_CWORD, offsetof(_cmsg, Flags)},
 304     /*21 */
 305  {_CDWORD, offsetof(_cmsg, Function)},
 306     /*22 */
 307  {_CSTRUCT, offsetof(_cmsg, HLC)},
 308     /*23 */
 309  {_CWORD, offsetof(_cmsg, Info)},
 310     /*24 */
 311  {_CSTRUCT, offsetof(_cmsg, InfoElement)},
 312     /*25 */
 313  {_CDWORD, offsetof(_cmsg, InfoMask)},
 314     /*26 */
 315  {_CWORD, offsetof(_cmsg, InfoNumber)},
 316     /*27 */
 317  {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
 318     /*28 */
 319  {_CSTRUCT, offsetof(_cmsg, LLC)},
 320     /*29 */
 321  {_CSTRUCT, offsetof(_cmsg, ManuData)},
 322     /*2a */
 323  {_CDWORD, offsetof(_cmsg, ManuID)},
 324     /*2b */
 325  {_CSTRUCT, offsetof(_cmsg, NCPI)},
 326     /*2c */
 327  {_CWORD, offsetof(_cmsg, Reason)},
 328     /*2d */
 329  {_CWORD, offsetof(_cmsg, Reason_B3)},
 330     /*2e */
 331  {_CWORD, offsetof(_cmsg, Reject)},
 332     /*2f */
 333  {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
 334 };
 335
 336 static unsigned char *cpars[] =
 337 {
 338     /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
 339     /* 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",
 340     /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
 341     /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
 342     /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
 343     /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
 344     /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
 345     /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
 346     /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
 347     /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
 348     /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
 349     /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
 350     /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
 351     /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
 352     /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
 353     /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
 354     /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
 355     /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
 356     /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
 357     /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
 358     /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
 359     /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
 360     /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
 361     /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
 362     /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
 363     /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
 364     /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
 365     /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
 366     /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
 367     /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
 368     /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
 369     /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
 370     /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
 371     /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
 372     /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
 373     /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
 374     /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
 375     /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
 376     /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
 377     /* INFO_RESP */ [0x3e] = "\x03\x01",
 378     /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
 379     /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
 380     /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
 381     /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
 382     /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
 383     /* RESET_B3_RESP */ [0x46] = "\x03\x01",
 384     /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
 385     /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
 386 };
 387
 388 /*-------------------------------------------------------*/
 389
 390 #define byteTLcpy(x,y)        *(u8 *)(x)=*(u8 *)(y);
 391 #define wordTLcpy(x,y)        *(u16 *)(x)=*(u16 *)(y);
 392 #define dwordTLcpy(x,y)       memcpy(x,y,4);
 393 #define structTLcpy(x,y,l)    memcpy (x,y,l)
 394 #define structTLcpyovl(x,y,l) memmove (x,y,l)
 395
 396 #define byteTRcpy(x,y)        *(u8 *)(y)=*(u8 *)(x);
 397 #define wordTRcpy(x,y)        *(u16 *)(y)=*(u16 *)(x);
 398 #define dwordTRcpy(x,y)       memcpy(y,x,4);
 399 #define structTRcpy(x,y,l)    memcpy (y,x,l)
 400 #define structTRcpyovl(x,y,l) memmove (y,x,l)
 401
 402 /*-------------------------------------------------------*/
 403 static unsigned command_2_index(unsigned c, unsigned sc)
 404 {
 405         if (c & 0x80)
 406                 c = 0x9 + (c & 0x0f);
 407         else if (c <= 0x0f);
 408         else if (c == 0x41)
 409                 c = 0x9 + 0x1;
 410         else if (c == 0xff)
 411                 c = 0x00;
 412         return (sc & 3) * (0x9 + 0x9) + c;
 413 }
 414
 415 /*-------------------------------------------------------*/
 416 #define TYP (cdef[cmsg->par[cmsg->p]].typ)
 417 #define OFF (((u8 *)cmsg)+cdef[cmsg->par[cmsg->p]].off)
 418
 419 static void jumpcstruct(_cmsg * cmsg)
 420 {
 421         unsigned layer;
 422         for (cmsg->p++, layer = 1; layer;) {
 423                 /* $$$$$ assert (cmsg->p); */
 424                 cmsg->p++;
 425                 switch (TYP) {
 426                 case _CMSTRUCT:
 427                         layer++;
 428                         break;
 429                 case _CEND:
 430                         layer--;
 431                         break;
 432                 }
 433         }
 434 }
 435 /*-------------------------------------------------------*/
 436 static void pars_2_message(_cmsg * cmsg)
 437 {
 438
 439         for (; TYP != _CEND; cmsg->p++) {
 440                 switch (TYP) {
 441                 case _CBYTE:
 442                         byteTLcpy(cmsg->m + cmsg->l, OFF);
 443                         cmsg->l++;
 444                         break;
 445                 case _CWORD:
 446                         wordTLcpy(cmsg->m + cmsg->l, OFF);
 447                         cmsg->l += 2;
 448                         break;
 449                 case _CDWORD:
 450                         dwordTLcpy(cmsg->m + cmsg->l, OFF);
 451                         cmsg->l += 4;
 452                         break;
 453                 case _CSTRUCT:
 454                         if (*(u8 **) OFF == NULL) {
 455                                 *(cmsg->m + cmsg->l) = '\0';
 456                                 cmsg->l++;
 457                         } else if (**(_cstruct *) OFF != 0xff) {
 458                                 structTLcpy(cmsg->m + cmsg->l, *(_cstruct *) OFF, 1 + **(_cstruct *) OFF);
 459                                 cmsg->l += 1 + **(_cstruct *) OFF;
 460                         } else {
 461                                 _cstruct s = *(_cstruct *) OFF;
 462                                 structTLcpy(cmsg->m + cmsg->l, s, 3 + *(u16 *) (s + 1));
 463                                 cmsg->l += 3 + *(u16 *) (s + 1);
 464                         }
 465                         break;
 466                 case _CMSTRUCT:
 467 /*----- Metastruktur 0 -----*/
 468                         if (*(_cmstruct *) OFF == CAPI_DEFAULT) {
 469                                 *(cmsg->m + cmsg->l) = '\0';
 470                                 cmsg->l++;
 471                                 jumpcstruct(cmsg);
 472                         }
 473 /*----- Metastruktur wird composed -----*/
 474                         else {
 475                                 unsigned _l = cmsg->l;
 476                                 unsigned _ls;
 477                                 cmsg->l++;
 478                                 cmsg->p++;
 479                                 pars_2_message(cmsg);
 480                                 _ls = cmsg->l - _l - 1;
 481                                 if (_ls < 255)
 482                                         (cmsg->m + _l)[0] = (u8) _ls;
 483                                 else {
 484                                         structTLcpyovl(cmsg->m + _l + 3, cmsg->m + _l + 1, _ls);
 485                                         (cmsg->m + _l)[0] = 0xff;
 486                                         wordTLcpy(cmsg->m + _l + 1, &_ls);
 487                                 }
 488                         }
 489                         break;
 490                 }
 491         }
 492 }
 493
 494 /**
 495  * capi_cmsg2message() - assemble CAPI 2.0 message from _cmsg structure
 496  * @cmsg:       _cmsg structure
 497  * @msg:        buffer for assembled message
 498  *
 499  * Return value: 0 for success
 500  */
 501
 502 unsigned capi_cmsg2message(_cmsg * cmsg, u8 * msg)
 503 {
 504         cmsg->m = msg;
 505         cmsg->l = 8;
 506         cmsg->p = 0;
 507         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 508
 509         pars_2_message(cmsg);
 510
 511         wordTLcpy(msg + 0, &cmsg->l);
 512         byteTLcpy(cmsg->m + 4, &cmsg->Command);
 513         byteTLcpy(cmsg->m + 5, &cmsg->Subcommand);
 514         wordTLcpy(cmsg->m + 2, &cmsg->ApplId);
 515         wordTLcpy(cmsg->m + 6, &cmsg->Messagenumber);
 516
 517         return 0;
 518 }
 519
 520 /*-------------------------------------------------------*/
 521 static void message_2_pars(_cmsg * cmsg)
 522 {
 523         for (; TYP != _CEND; cmsg->p++) {
 524
 525                 switch (TYP) {
 526                 case _CBYTE:
 527                         byteTRcpy(cmsg->m + cmsg->l, OFF);
 528                         cmsg->l++;
 529                         break;
 530                 case _CWORD:
 531                         wordTRcpy(cmsg->m + cmsg->l, OFF);
 532                         cmsg->l += 2;
 533                         break;
 534                 case _CDWORD:
 535                         dwordTRcpy(cmsg->m + cmsg->l, OFF);
 536                         cmsg->l += 4;
 537                         break;
 538                 case _CSTRUCT:
 539                         *(u8 **) OFF = cmsg->m + cmsg->l;
 540
 541                         if (cmsg->m[cmsg->l] != 0xff)
 542                                 cmsg->l += 1 + cmsg->m[cmsg->l];
 543                         else
 544                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
 545                         break;
 546                 case _CMSTRUCT:
 547 /*----- Metastruktur 0 -----*/
 548                         if (cmsg->m[cmsg->l] == '\0') {
 549                                 *(_cmstruct *) OFF = CAPI_DEFAULT;
 550                                 cmsg->l++;
 551                                 jumpcstruct(cmsg);
 552                         } else {
 553                                 unsigned _l = cmsg->l;
 554                                 *(_cmstruct *) OFF = CAPI_COMPOSE;
 555                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
 556                                 cmsg->p++;
 557                                 message_2_pars(cmsg);
 558                         }
 559                         break;
 560                 }
 561         }
 562 }
 563
 564 /**
 565  * capi_message2cmsg() - disassemble CAPI 2.0 message into _cmsg structure
 566  * @cmsg:       _cmsg structure
 567  * @msg:        buffer for assembled message
 568  *
 569  * Return value: 0 for success
 570  */
 571
 572 unsigned capi_message2cmsg(_cmsg * cmsg, u8 * msg)
 573 {
 574         memset(cmsg, 0, sizeof(_cmsg));
 575         cmsg->m = msg;
 576         cmsg->l = 8;
 577         cmsg->p = 0;
 578         byteTRcpy(cmsg->m + 4, &cmsg->Command);
 579         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
 580         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 581
 582         message_2_pars(cmsg);
 583
 584         wordTRcpy(msg + 0, &cmsg->l);
 585         wordTRcpy(cmsg->m + 2, &cmsg->ApplId);
 586         wordTRcpy(cmsg->m + 6, &cmsg->Messagenumber);
 587
 588         return 0;
 589 }
 590
 591 /**
 592  * capi_cmsg_header() - initialize header part of _cmsg structure
 593  * @cmsg:       _cmsg structure
 594  * @_ApplId:    ApplID field value
 595  * @_Command:   Command field value
 596  * @_Subcommand:        Subcommand field value
 597  * @_Messagenumber:     Message Number field value
 598  * @_Controller:        Controller/PLCI/NCCI field value
 599  *
 600  * Return value: 0 for success
 601  */
 602
 603 unsigned capi_cmsg_header(_cmsg * cmsg, u16 _ApplId,
 604                           u8 _Command, u8 _Subcommand,
 605                           u16 _Messagenumber, u32 _Controller)
 606 {
 607         memset(cmsg, 0, sizeof(_cmsg));
 608         cmsg->ApplId = _ApplId;
 609         cmsg->Command = _Command;
 610         cmsg->Subcommand = _Subcommand;
 611         cmsg->Messagenumber = _Messagenumber;
 612         cmsg->adr.adrController = _Controller;
 613         return 0;
 614 }
 615
 616 /*-------------------------------------------------------*/
 617
 618 static char *mnames[] =
 619 {
 620         [0x01] = "ALERT_REQ",
 621         [0x02] = "CONNECT_REQ",
 622         [0x04] = "DISCONNECT_REQ",
 623         [0x05] = "LISTEN_REQ",
 624         [0x08] = "INFO_REQ",
 625         [0x09] = "FACILITY_REQ",
 626         [0x0a] = "SELECT_B_PROTOCOL_REQ",
 627         [0x0b] = "CONNECT_B3_REQ",
 628         [0x0d] = "DISCONNECT_B3_REQ",
 629         [0x0f] = "DATA_B3_REQ",
 630         [0x10] = "RESET_B3_REQ",
 631         [0x13] = "ALERT_CONF",
 632         [0x14] = "CONNECT_CONF",
 633         [0x16] = "DISCONNECT_CONF",
 634         [0x17] = "LISTEN_CONF",
 635         [0x18] = "MANUFACTURER_REQ",
 636         [0x1a] = "INFO_CONF",
 637         [0x1b] = "FACILITY_CONF",
 638         [0x1c] = "SELECT_B_PROTOCOL_CONF",
 639         [0x1d] = "CONNECT_B3_CONF",
 640         [0x1f] = "DISCONNECT_B3_CONF",
 641         [0x21] = "DATA_B3_CONF",
 642         [0x22] = "RESET_B3_CONF",
 643         [0x26] = "CONNECT_IND",
 644         [0x27] = "CONNECT_ACTIVE_IND",
 645         [0x28] = "DISCONNECT_IND",
 646         [0x2a] = "MANUFACTURER_CONF",
 647         [0x2c] = "INFO_IND",
 648         [0x2d] = "FACILITY_IND",
 649         [0x2f] = "CONNECT_B3_IND",
 650         [0x30] = "CONNECT_B3_ACTIVE_IND",
 651         [0x31] = "DISCONNECT_B3_IND",
 652         [0x33] = "DATA_B3_IND",
 653         [0x34] = "RESET_B3_IND",
 654         [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
 655         [0x38] = "CONNECT_RESP",
 656         [0x39] = "CONNECT_ACTIVE_RESP",
 657         [0x3a] = "DISCONNECT_RESP",
 658         [0x3c] = "MANUFACTURER_IND",
 659         [0x3e] = "INFO_RESP",
 660         [0x3f] = "FACILITY_RESP",
 661         [0x41] = "CONNECT_B3_RESP",
 662         [0x42] = "CONNECT_B3_ACTIVE_RESP",
 663         [0x43] = "DISCONNECT_B3_RESP",
 664         [0x45] = "DATA_B3_RESP",
 665         [0x46] = "RESET_B3_RESP",
 666         [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
 667         [0x4e] = "MANUFACTURER_RESP"
 668 };
 669
 670 /**
 671  * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
 672  * @cmd:        command number
 673  * @subcmd:     subcommand number
 674  *
 675  * Return value: static string, NULL if command/subcommand unknown
 676  */
 677
 678 char *capi_cmd2str(u8 cmd, u8 subcmd)
 679 {
 680         return mnames[command_2_index(cmd, subcmd)];
 681 }
 682
 683
 684 /*-------------------------------------------------------*/
 685
 686 #ifdef CONFIG_CAPI_TRACE
 687
 688 /*-------------------------------------------------------*/
 689
 690 static char *pnames[] =
 691 {
 692     /*00 */ NULL,
 693     /*01 */ NULL,
 694     /*02 */ NULL,
 695     /*03 */ "Controller/PLCI/NCCI",
 696     /*04 */ "AdditionalInfo",
 697     /*05 */ "B1configuration",
 698     /*06 */ "B1protocol",
 699     /*07 */ "B2configuration",
 700     /*08 */ "B2protocol",
 701     /*09 */ "B3configuration",
 702     /*0a */ "B3protocol",
 703     /*0b */ "BC",
 704     /*0c */ "BChannelinformation",
 705     /*0d */ "BProtocol",
 706     /*0e */ "CalledPartyNumber",
 707     /*0f */ "CalledPartySubaddress",
 708     /*10 */ "CallingPartyNumber",
 709     /*11 */ "CallingPartySubaddress",
 710     /*12 */ "CIPmask",
 711     /*13 */ "CIPmask2",
 712     /*14 */ "CIPValue",
 713     /*15 */ "Class",
 714     /*16 */ "ConnectedNumber",
 715     /*17 */ "ConnectedSubaddress",
 716     /*18 */ "Data32",
 717     /*19 */ "DataHandle",
 718     /*1a */ "DataLength",
 719     /*1b */ "FacilityConfirmationParameter",
 720     /*1c */ "Facilitydataarray",
 721     /*1d */ "FacilityIndicationParameter",
 722     /*1e */ "FacilityRequestParameter",
 723     /*1f */ "FacilitySelector",
 724     /*20 */ "Flags",
 725     /*21 */ "Function",
 726     /*22 */ "HLC",
 727     /*23 */ "Info",
 728     /*24 */ "InfoElement",
 729     /*25 */ "InfoMask",
 730     /*26 */ "InfoNumber",
 731     /*27 */ "Keypadfacility",
 732     /*28 */ "LLC",
 733     /*29 */ "ManuData",
 734     /*2a */ "ManuID",
 735     /*2b */ "NCPI",
 736     /*2c */ "Reason",
 737     /*2d */ "Reason_B3",
 738     /*2e */ "Reject",
 739     /*2f */ "Useruserdata"
 740 };
 741
 742
 743
 744 #include <stdarg.h>
 745
 746 /*-------------------------------------------------------*/
 747 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt,...)
 748 {
 749         va_list f;
 750         size_t n,r;
 751
 752         if (!cdb)
 753                 return NULL;
 754         va_start(f, fmt);
 755         r = cdb->size - cdb->pos;
 756         n = vsnprintf(cdb->p, r, fmt, f);
 757         va_end(f);
 758         if (n >= r) {
 759                 /* truncated, need bigger buffer */
 760                 size_t ns = 2 * cdb->size;
 761                 u_char *nb;
 762
 763                 while ((ns - cdb->pos) <= n)
 764                         ns *= 2;
 765                 nb = kmalloc(ns, GFP_ATOMIC);
 766                 if (!nb) {
 767                         cdebbuf_free(cdb);
 768                         return NULL;
 769                 }
 770                 memcpy(nb, cdb->buf, cdb->pos);
 771                 kfree(cdb->buf);
 772                 nb[cdb->pos] = 0;
 773                 cdb->buf = nb;
 774                 cdb->p = cdb->buf + cdb->pos;
 775                 cdb->size = ns;
 776                 va_start(f, fmt);
 777                 r = cdb->size - cdb->pos;
 778                 n = vsnprintf(cdb->p, r, fmt, f);
 779                 va_end(f);
 780         }
 781         cdb->p += n;
 782         cdb->pos += n;
 783         return cdb;
 784 }
 785
 786 static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 * m, unsigned len)
 787 {
 788         unsigned hex = 0;
 789
 790         if (!cdb)
 791                 return NULL;
 792         for (; len; len--, m++)
 793                 if (isalnum(*m) || *m == ' ') {
 794                         if (hex)
 795                                 cdb = bufprint(cdb, ">");
 796                         cdb = bufprint(cdb, "%c", *m);
 797                         hex = 0;
 798                 } else {
 799                         if (!hex)
 800                                 cdb = bufprint(cdb, "<%02x", *m);
 801                         else
 802                                 cdb = bufprint(cdb, " %02x", *m);
 803                         hex = 1;
 804                 }
 805         if (hex)
 806                 cdb = bufprint(cdb, ">");
 807         return cdb;
 808 }
 809
 810 static _cdebbuf *printstruct(_cdebbuf *cdb, u8 * m)
 811 {
 812         unsigned len;
 813
 814         if (m[0] != 0xff) {
 815                 len = m[0];
 816                 m += 1;
 817         } else {
 818                 len = ((u16 *) (m + 1))[0];
 819                 m += 3;
 820         }
 821         cdb = printstructlen(cdb, m, len);
 822         return cdb;
 823 }
 824
 825 /*-------------------------------------------------------*/
 826 #define NAME (pnames[cmsg->par[cmsg->p]])
 827
 828 static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
 829 {
 830         for (; TYP != _CEND; cmsg->p++) {
 831                 int slen = 29 + 3 - level;
 832                 int i;
 833
 834                 if (!cdb)
 835                         return NULL;
 836                 cdb = bufprint(cdb, "  ");
 837                 for (i = 0; i < level - 1; i++)
 838                         cdb = bufprint(cdb, " ");
 839
 840                 switch (TYP) {
 841                 case _CBYTE:
 842                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
 843                         cmsg->l++;
 844                         break;
 845                 case _CWORD:
 846                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
 847                         cmsg->l += 2;
 848                         break;
 849                 case _CDWORD:
 850                         cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
 851                         cmsg->l += 4;
 852                         break;
 853                 case _CSTRUCT:
 854                         cdb = bufprint(cdb, "%-*s = ", slen, NAME);
 855                         if (cmsg->m[cmsg->l] == '\0')
 856                                 cdb = bufprint(cdb, "default");
 857                         else
 858                                 cdb = printstruct(cdb, cmsg->m + cmsg->l);
 859                         cdb = bufprint(cdb, "\n");
 860                         if (cmsg->m[cmsg->l] != 0xff)
 861                                 cmsg->l += 1 + cmsg->m[cmsg->l];
 862                         else
 863                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
 864
 865                         break;
 866
 867                 case _CMSTRUCT:
 868 /*----- Metastruktur 0 -----*/
 869                         if (cmsg->m[cmsg->l] == '\0') {
 870                                 cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
 871                                 cmsg->l++;
 872                                 jumpcstruct(cmsg);
 873                         } else {
 874                                 char *name = NAME;
 875                                 unsigned _l = cmsg->l;
 876                                 cdb = bufprint(cdb, "%-*s\n", slen, name);
 877                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
 878                                 cmsg->p++;
 879                                 cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
 880                         }
 881                         break;
 882                 }
 883         }
 884         return cdb;
 885 }
 886 /*-------------------------------------------------------*/
 887
 888 static _cdebbuf *g_debbuf;
 889 static u_long g_debbuf_lock;
 890 static _cmsg *g_cmsg;
 891
 892 static _cdebbuf *cdebbuf_alloc(void)
 893 {
 894         _cdebbuf *cdb;
 895
 896         if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
 897                 cdb = g_debbuf;
 898                 goto init;
 899         } else
 900                 cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
 901         if (!cdb)
 902                 return NULL;
 903         cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
 904         if (!cdb->buf) {
 905                 kfree(cdb);
 906                 return NULL;
 907         }
 908         cdb->size = CDEBUG_SIZE;
 909 init:
 910         cdb->buf[0] = 0;
 911         cdb->p = cdb->buf;
 912         cdb->pos = 0;
 913         return cdb;
 914 }
 915
 916 /**
 917  * cdebbuf_free() - free CAPI debug buffer
 918  * @cdb:        buffer to free
 919  */
 920
 921 void cdebbuf_free(_cdebbuf *cdb)
 922 {
 923         if (likely(cdb == g_debbuf)) {
 924                 test_and_clear_bit(1, &g_debbuf_lock);
 925                 return;
 926         }
 927         if (likely(cdb))
 928                 kfree(cdb->buf);
 929         kfree(cdb);
 930 }
 931
 932
 933 /**
 934  * capi_message2str() - format CAPI 2.0 message for printing
 935  * @msg:        CAPI 2.0 message
 936  *
 937  * Allocates a CAPI debug buffer and fills it with a printable representation
 938  * of the CAPI 2.0 message in @msg.
 939  * Return value: allocated debug buffer, NULL on error
 940  * The returned buffer should be freed by a call to cdebbuf_free() after use.
 941  */
 942
 943 _cdebbuf *capi_message2str(u8 * msg)
 944 {
 945         _cdebbuf *cdb;
 946         _cmsg   *cmsg;
 947
 948         cdb = cdebbuf_alloc();
 949         if (unlikely(!cdb))
 950                 return NULL;
 951         if (likely(cdb == g_debbuf))
 952                 cmsg = g_cmsg;
 953         else
 954                 cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
 955         if (unlikely(!cmsg)) {
 956                 cdebbuf_free(cdb);
 957                 return NULL;
 958         }
 959         cmsg->m = msg;
 960         cmsg->l = 8;
 961         cmsg->p = 0;
 962         byteTRcpy(cmsg->m + 4, &cmsg->Command);
 963         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
 964         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 965
 966         cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
 967                  mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
 968                  ((unsigned short *) msg)[1],
 969                  ((unsigned short *) msg)[3],
 970                  ((unsigned short *) msg)[0]);
 971
 972         cdb = protocol_message_2_pars(cdb, cmsg, 1);
 973         if (unlikely(cmsg != g_cmsg))
 974                 kfree(cmsg);
 975         return cdb;
 976 }
 977
 978 /**
 979  * capi_cmsg2str() - format _cmsg structure for printing
 980  * @cmsg:       _cmsg structure
 981  *
 982  * Allocates a CAPI debug buffer and fills it with a printable representation
 983  * of the CAPI 2.0 message stored in @cmsg by a previous call to
 984  * capi_cmsg2message() or capi_message2cmsg().
 985  * Return value: allocated debug buffer, NULL on error
 986  * The returned buffer should be freed by a call to cdebbuf_free() after use.
 987  */
 988
 989 _cdebbuf *capi_cmsg2str(_cmsg * cmsg)
 990 {
 991         _cdebbuf *cdb;
 992
 993         if (!cmsg->m)
 994                 return NULL;    /* no message */
 995         cdb = cdebbuf_alloc();
 996         if (!cdb)
 997                 return NULL;
 998         cmsg->l = 8;
 999         cmsg->p = 0;
1000         cdb = bufprint(cdb, "%s ID=%03d #0x%04x LEN=%04d\n",
1001                  mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
1002                  ((u16 *) cmsg->m)[1],
1003                  ((u16 *) cmsg->m)[3],
1004                  ((u16 *) cmsg->m)[0]);
1005         cdb = protocol_message_2_pars(cdb, cmsg, 1);
1006         return cdb;
1007 }
1008
1009 int __init cdebug_init(void)
1010 {
1011         g_cmsg= kmalloc(sizeof(_cmsg), GFP_KERNEL);
1012         if (!g_cmsg)
1013                 return -ENOMEM;
1014         g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
1015         if (!g_debbuf) {
1016                 kfree(g_cmsg);
1017                 return -ENOMEM;
1018         }
1019         g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
1020         if (!g_debbuf->buf) {
1021                 kfree(g_cmsg);
1022                 kfree(g_debbuf);
1023                 return -ENOMEM;
1024         }
1025         g_debbuf->size = CDEBUG_GSIZE;
1026         g_debbuf->buf[0] = 0;
1027         g_debbuf->p = g_debbuf->buf;
1028         g_debbuf->pos = 0;
1029         return 0;
1030 }
1031
1032 void __exit cdebug_exit(void)
1033 {
1034         if (g_debbuf)
1035                 kfree(g_debbuf->buf);
1036         kfree(g_debbuf);
1037         kfree(g_cmsg);
1038 }
1039
1040 #else /* !CONFIG_CAPI_TRACE */
1041
1042 static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
1043
1044 _cdebbuf *capi_message2str(u8 * msg)
1045 {
1046         return &g_debbuf;
1047 }
1048
1049 _cdebbuf *capi_cmsg2str(_cmsg * cmsg)
1050 {
1051         return &g_debbuf;
1052 }
1053
1054 void cdebbuf_free(_cdebbuf *cdb)
1055 {
1056 }
1057
1058 int __init cdebug_init(void)
1059 {
1060         return 0;
1061 }
1062
1063 void __exit cdebug_exit(void)
1064 {
1065 }
1066
1067 #endif
1068
1069 EXPORT_SYMBOL(cdebbuf_free);
1070 EXPORT_SYMBOL(capi_cmsg2message);
1071 EXPORT_SYMBOL(capi_message2cmsg);
1072 EXPORT_SYMBOL(capi_cmsg_header);
1073 EXPORT_SYMBOL(capi_cmd2str);
1074 EXPORT_SYMBOL(capi_cmsg2str);
1075 EXPORT_SYMBOL(capi_message2str);
1076 EXPORT_SYMBOL(capi_info2str);