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
  22 /* from CAPI2.0 DDK AVM Berlin GmbH */
  23
  24 #ifndef CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON
  25 char *capi_info2str(u16 reason)
  26 {
  27     return "..";
  28 }
  29 #else
  30 char *capi_info2str(u16 reason)
  31 {
  32     switch (reason) {
  33
  34 /*-- informative values (corresponding message was processed) -----*/
  35         case 0x0001:
  36            return "NCPI not supported by current protocol, NCPI ignored";
  37         case 0x0002:
  38            return "Flags not supported by current protocol, flags ignored";
  39         case 0x0003:
  40            return "Alert already sent by another application";
  41
  42 /*-- error information concerning CAPI_REGISTER -----*/
  43         case 0x1001:
  44            return "Too many applications";
  45         case 0x1002:
  46            return "Logical block size too small, must be at least 128 Bytes";
  47         case 0x1003:
  48            return "Buffer exceeds 64 kByte";
  49         case 0x1004:
  50            return "Message buffer size too small, must be at least 1024 Bytes";
  51         case 0x1005:
  52            return "Max. number of logical connections not supported";
  53         case 0x1006:
  54            return "Reserved";
  55         case 0x1007:
  56            return "The message could not be accepted because of an internal busy condition";
  57         case 0x1008:
  58            return "OS resource error (no memory ?)";
  59         case 0x1009:
  60            return "CAPI not installed";
  61         case 0x100A:
  62            return "Controller does not support external equipment";
  63         case 0x100B:
  64            return "Controller does only support external equipment";
  65
  66 /*-- error information concerning message exchange functions -----*/
  67         case 0x1101:
  68            return "Illegal application number";
  69         case 0x1102:
  70            return "Illegal command or subcommand or message length less than 12 bytes";
  71         case 0x1103:
  72            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";
  73         case 0x1104:
  74            return "Queue is empty";
  75         case 0x1105:
  76            return "Queue overflow, a message was lost !! This indicates a configuration error. The only recovery from this error is to perform a CAPI_RELEASE";
  77         case 0x1106:
  78            return "Unknown notification parameter";
  79         case 0x1107:
  80            return "The Message could not be accepted because of an internal busy condition";
  81         case 0x1108:
  82            return "OS Resource error (no memory ?)";
  83         case 0x1109:
  84            return "CAPI not installed";
  85         case 0x110A:
  86            return "Controller does not support external equipment";
  87         case 0x110B:
  88            return "Controller does only support external equipment";
  89
  90 /*-- error information concerning resource / coding problems -----*/
  91         case 0x2001:
  92            return "Message not supported in current state";
  93         case 0x2002:
  94            return "Illegal Controller / PLCI / NCCI";
  95         case 0x2003:
  96            return "Out of PLCI";
  97         case 0x2004:
  98            return "Out of NCCI";
  99         case 0x2005:
 100            return "Out of LISTEN";
 101         case 0x2006:
 102            return "Out of FAX resources (protocol T.30)";
 103         case 0x2007:
 104            return "Illegal message parameter coding";
 105
 106 /*-- error information concerning requested services  -----*/
 107         case 0x3001:
 108            return "B1 protocol not supported";
 109         case 0x3002:
 110            return "B2 protocol not supported";
 111         case 0x3003:
 112            return "B3 protocol not supported";
 113         case 0x3004:
 114            return "B1 protocol parameter not supported";
 115         case 0x3005:
 116            return "B2 protocol parameter not supported";
 117         case 0x3006:
 118            return "B3 protocol parameter not supported";
 119         case 0x3007:
 120            return "B protocol combination not supported";
 121         case 0x3008:
 122            return "NCPI not supported";
 123         case 0x3009:
 124            return "CIP Value unknown";
 125         case 0x300A:
 126            return "Flags not supported (reserved bits)";
 127         case 0x300B:
 128            return "Facility not supported";
 129         case 0x300C:
 130            return "Data length not supported by current protocol";
 131         case 0x300D:
 132            return "Reset procedure not supported by current protocol";
 133
 134 /*-- informations about the clearing of a physical connection -----*/
 135         case 0x3301:
 136            return "Protocol error layer 1 (broken line or B-channel removed by signalling protocol)";
 137         case 0x3302:
 138            return "Protocol error layer 2";
 139         case 0x3303:
 140            return "Protocol error layer 3";
 141         case 0x3304:
 142            return "Another application got that call";
 143 /*-- T.30 specific reasons -----*/
 144         case 0x3311:
 145            return "Connecting not successful (remote station is no FAX G3 machine)";
 146         case 0x3312:
 147            return "Connecting not successful (training error)";
 148         case 0x3313:
 149            return "Disconnected before transfer (remote station does not support transfer mode, e.g. resolution)";
 150         case 0x3314:
 151            return "Disconnected during transfer (remote abort)";
 152         case 0x3315:
 153            return "Disconnected during transfer (remote procedure error, e.g. unsuccessful repetition of T.30 commands)";
 154         case 0x3316:
 155            return "Disconnected during transfer (local tx data underrun)";
 156         case 0x3317:
 157            return "Disconnected during transfer (local rx data overflow)";
 158         case 0x3318:
 159            return "Disconnected during transfer (local abort)";
 160         case 0x3319:
 161            return "Illegal parameter coding (e.g. SFF coding error)";
 162
 163 /*-- disconnect causes from the network according to ETS 300 102-1/Q.931 -----*/
 164         case 0x3481: return "Unallocated (unassigned) number";
 165         case 0x3482: return "No route to specified transit network";
 166         case 0x3483: return "No route to destination";
 167         case 0x3486: return "Channel unacceptable";
 168         case 0x3487:
 169            return "Call awarded and being delivered in an established channel";
 170         case 0x3490: return "Normal call clearing";
 171         case 0x3491: return "User busy";
 172         case 0x3492: return "No user responding";
 173         case 0x3493: return "No answer from user (user alerted)";
 174         case 0x3495: return "Call rejected";
 175         case 0x3496: return "Number changed";
 176         case 0x349A: return "Non-selected user clearing";
 177         case 0x349B: return "Destination out of order";
 178         case 0x349C: return "Invalid number format";
 179         case 0x349D: return "Facility rejected";
 180         case 0x349E: return "Response to STATUS ENQUIRY";
 181         case 0x349F: return "Normal, unspecified";
 182         case 0x34A2: return "No circuit / channel available";
 183         case 0x34A6: return "Network out of order";
 184         case 0x34A9: return "Temporary failure";
 185         case 0x34AA: return "Switching equipment congestion";
 186         case 0x34AB: return "Access information discarded";
 187         case 0x34AC: return "Requested circuit / channel not available";
 188         case 0x34AF: return "Resources unavailable, unspecified";
 189         case 0x34B1: return "Quality of service unavailable";
 190         case 0x34B2: return "Requested facility not subscribed";
 191         case 0x34B9: return "Bearer capability not authorized";
 192         case 0x34BA: return "Bearer capability not presently available";
 193         case 0x34BF: return "Service or option not available, unspecified";
 194         case 0x34C1: return "Bearer capability not implemented";
 195         case 0x34C2: return "Channel type not implemented";
 196         case 0x34C5: return "Requested facility not implemented";
 197         case 0x34C6: return "Only restricted digital information bearer capability is available";
 198         case 0x34CF: return "Service or option not implemented, unspecified";
 199         case 0x34D1: return "Invalid call reference value";
 200         case 0x34D2: return "Identified channel does not exist";
 201         case 0x34D3: return "A suspended call exists, but this call identity does not";
 202         case 0x34D4: return "Call identity in use";
 203         case 0x34D5: return "No call suspended";
 204         case 0x34D6: return "Call having the requested call identity has been cleared";
 205         case 0x34D8: return "Incompatible destination";
 206         case 0x34DB: return "Invalid transit network selection";
 207         case 0x34DF: return "Invalid message, unspecified";
 208         case 0x34E0: return "Mandatory information element is missing";
 209         case 0x34E1: return "Message type non-existent or not implemented";
 210         case 0x34E2: return "Message not compatible with call state or message type non-existent or not implemented";
 211         case 0x34E3: return "Information element non-existent or not implemented";
 212         case 0x34E4: return "Invalid information element contents";
 213         case 0x34E5: return "Message not compatible with call state";
 214         case 0x34E6: return "Recovery on timer expiry";
 215         case 0x34EF: return "Protocol error, unspecified";
 216         case 0x34FF: return "Interworking, unspecified";
 217
 218         default: return "No additional information";
 219     }
 220 }
 221 #endif
 222
 223 typedef struct {
 224         int typ;
 225         size_t off;
 226 } _cdef;
 227
 228 #define _CBYTE         1
 229 #define _CWORD         2
 230 #define _CDWORD        3
 231 #define _CSTRUCT       4
 232 #define _CMSTRUCT      5
 233 #define _CEND          6
 234
 235 static _cdef cdef[] =
 236 {
 237     /*00 */
 238  {_CEND},
 239     /*01 */
 240  {_CEND},
 241     /*02 */
 242  {_CEND},
 243     /*03 */
 244  {_CDWORD, offsetof(_cmsg, adr.adrController)},
 245     /*04 */
 246  {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
 247     /*05 */
 248  {_CSTRUCT, offsetof(_cmsg, B1configuration)},
 249     /*06 */
 250  {_CWORD, offsetof(_cmsg, B1protocol)},
 251     /*07 */
 252  {_CSTRUCT, offsetof(_cmsg, B2configuration)},
 253     /*08 */
 254  {_CWORD, offsetof(_cmsg, B2protocol)},
 255     /*09 */
 256  {_CSTRUCT, offsetof(_cmsg, B3configuration)},
 257     /*0a */
 258  {_CWORD, offsetof(_cmsg, B3protocol)},
 259     /*0b */
 260  {_CSTRUCT, offsetof(_cmsg, BC)},
 261     /*0c */
 262  {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
 263     /*0d */
 264  {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
 265     /*0e */
 266  {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
 267     /*0f */
 268  {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
 269     /*10 */
 270  {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
 271     /*11 */
 272  {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
 273     /*12 */
 274  {_CDWORD, offsetof(_cmsg, CIPmask)},
 275     /*13 */
 276  {_CDWORD, offsetof(_cmsg, CIPmask2)},
 277     /*14 */
 278  {_CWORD, offsetof(_cmsg, CIPValue)},
 279     /*15 */
 280  {_CDWORD, offsetof(_cmsg, Class)},
 281     /*16 */
 282  {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
 283     /*17 */
 284  {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
 285     /*18 */
 286  {_CDWORD, offsetof(_cmsg, Data)},
 287     /*19 */
 288  {_CWORD, offsetof(_cmsg, DataHandle)},
 289     /*1a */
 290  {_CWORD, offsetof(_cmsg, DataLength)},
 291     /*1b */
 292  {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
 293     /*1c */
 294  {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
 295     /*1d */
 296  {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
 297     /*1e */
 298  {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
 299     /*1f */
 300  {_CWORD, offsetof(_cmsg, FacilitySelector)},
 301     /*20 */
 302  {_CWORD, offsetof(_cmsg, Flags)},
 303     /*21 */
 304  {_CDWORD, offsetof(_cmsg, Function)},
 305     /*22 */
 306  {_CSTRUCT, offsetof(_cmsg, HLC)},
 307     /*23 */
 308  {_CWORD, offsetof(_cmsg, Info)},
 309     /*24 */
 310  {_CSTRUCT, offsetof(_cmsg, InfoElement)},
 311     /*25 */
 312  {_CDWORD, offsetof(_cmsg, InfoMask)},
 313     /*26 */
 314  {_CWORD, offsetof(_cmsg, InfoNumber)},
 315     /*27 */
 316  {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
 317     /*28 */
 318  {_CSTRUCT, offsetof(_cmsg, LLC)},
 319     /*29 */
 320  {_CSTRUCT, offsetof(_cmsg, ManuData)},
 321     /*2a */
 322  {_CDWORD, offsetof(_cmsg, ManuID)},
 323     /*2b */
 324  {_CSTRUCT, offsetof(_cmsg, NCPI)},
 325     /*2c */
 326  {_CWORD, offsetof(_cmsg, Reason)},
 327     /*2d */
 328  {_CWORD, offsetof(_cmsg, Reason_B3)},
 329     /*2e */
 330  {_CWORD, offsetof(_cmsg, Reject)},
 331     /*2f */
 332  {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
 333 };
 334
 335 static unsigned char *cpars[] =
 336 {
 337     /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
 338     /* 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",
 339     /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
 340     /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
 341     /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
 342     /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
 343     /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
 344     /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
 345     /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
 346     /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
 347     /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
 348     /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
 349     /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
 350     /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
 351     /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
 352     /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
 353     /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
 354     /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
 355     /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
 356     /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
 357     /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
 358     /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
 359     /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
 360     /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
 361     /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
 362     /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
 363     /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
 364     /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
 365     /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
 366     /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
 367     /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
 368     /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
 369     /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
 370     /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
 371     /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
 372     /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
 373     /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
 374     /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
 375     /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
 376     /* INFO_RESP */ [0x3e] = "\x03\x01",
 377     /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
 378     /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
 379     /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
 380     /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
 381     /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
 382     /* RESET_B3_RESP */ [0x46] = "\x03\x01",
 383     /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
 384     /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
 385 };
 386
 387 /*-------------------------------------------------------*/
 388
 389 #define byteTLcpy(x,y)        *(u8 *)(x)=*(u8 *)(y);
 390 #define wordTLcpy(x,y)        *(u16 *)(x)=*(u16 *)(y);
 391 #define dwordTLcpy(x,y)       memcpy(x,y,4);
 392 #define structTLcpy(x,y,l)    memcpy (x,y,l)
 393 #define structTLcpyovl(x,y,l) memmove (x,y,l)
 394
 395 #define byteTRcpy(x,y)        *(u8 *)(y)=*(u8 *)(x);
 396 #define wordTRcpy(x,y)        *(u16 *)(y)=*(u16 *)(x);
 397 #define dwordTRcpy(x,y)       memcpy(y,x,4);
 398 #define structTRcpy(x,y,l)    memcpy (y,x,l)
 399 #define structTRcpyovl(x,y,l) memmove (y,x,l)
 400
 401 /*-------------------------------------------------------*/
 402 static unsigned command_2_index(unsigned c, unsigned sc)
 403 {
 404         if (c & 0x80)
 405                 c = 0x9 + (c & 0x0f);
 406         else if (c <= 0x0f);
 407         else if (c == 0x41)
 408                 c = 0x9 + 0x1;
 409         else if (c == 0xff)
 410                 c = 0x00;
 411         return (sc & 3) * (0x9 + 0x9) + c;
 412 }
 413
 414 /*-------------------------------------------------------*/
 415 #define TYP (cdef[cmsg->par[cmsg->p]].typ)
 416 #define OFF (((u8 *)cmsg)+cdef[cmsg->par[cmsg->p]].off)
 417
 418 static void jumpcstruct(_cmsg * cmsg)
 419 {
 420         unsigned layer;
 421         for (cmsg->p++, layer = 1; layer;) {
 422                 /* $$$$$ assert (cmsg->p); */
 423                 cmsg->p++;
 424                 switch (TYP) {
 425                 case _CMSTRUCT:
 426                         layer++;
 427                         break;
 428                 case _CEND:
 429                         layer--;
 430                         break;
 431                 }
 432         }
 433 }
 434 /*-------------------------------------------------------*/
 435 static void pars_2_message(_cmsg * cmsg)
 436 {
 437
 438         for (; TYP != _CEND; cmsg->p++) {
 439                 switch (TYP) {
 440                 case _CBYTE:
 441                         byteTLcpy(cmsg->m + cmsg->l, OFF);
 442                         cmsg->l++;
 443                         break;
 444                 case _CWORD:
 445                         wordTLcpy(cmsg->m + cmsg->l, OFF);
 446                         cmsg->l += 2;
 447                         break;
 448                 case _CDWORD:
 449                         dwordTLcpy(cmsg->m + cmsg->l, OFF);
 450                         cmsg->l += 4;
 451                         break;
 452                 case _CSTRUCT:
 453                         if (*(u8 **) OFF == NULL) {
 454                                 *(cmsg->m + cmsg->l) = '\0';
 455                                 cmsg->l++;
 456                         } else if (**(_cstruct *) OFF != 0xff) {
 457                                 structTLcpy(cmsg->m + cmsg->l, *(_cstruct *) OFF, 1 + **(_cstruct *) OFF);
 458                                 cmsg->l += 1 + **(_cstruct *) OFF;
 459                         } else {
 460                                 _cstruct s = *(_cstruct *) OFF;
 461                                 structTLcpy(cmsg->m + cmsg->l, s, 3 + *(u16 *) (s + 1));
 462                                 cmsg->l += 3 + *(u16 *) (s + 1);
 463                         }
 464                         break;
 465                 case _CMSTRUCT:
 466 /*----- Metastruktur 0 -----*/
 467                         if (*(_cmstruct *) OFF == CAPI_DEFAULT) {
 468                                 *(cmsg->m + cmsg->l) = '\0';
 469                                 cmsg->l++;
 470                                 jumpcstruct(cmsg);
 471                         }
 472 /*----- Metastruktur wird composed -----*/
 473                         else {
 474                                 unsigned _l = cmsg->l;
 475                                 unsigned _ls;
 476                                 cmsg->l++;
 477                                 cmsg->p++;
 478                                 pars_2_message(cmsg);
 479                                 _ls = cmsg->l - _l - 1;
 480                                 if (_ls < 255)
 481                                         (cmsg->m + _l)[0] = (u8) _ls;
 482                                 else {
 483                                         structTLcpyovl(cmsg->m + _l + 3, cmsg->m + _l + 1, _ls);
 484                                         (cmsg->m + _l)[0] = 0xff;
 485                                         wordTLcpy(cmsg->m + _l + 1, &_ls);
 486                                 }
 487                         }
 488                         break;
 489                 }
 490         }
 491 }
 492
 493 /**
 494  * capi_cmsg2message() - assemble CAPI 2.0 message from _cmsg structure
 495  * @cmsg:       _cmsg structure
 496  * @msg:        buffer for assembled message
 497  *
 498  * Return value: 0 for success
 499  */
 500
 501 unsigned capi_cmsg2message(_cmsg * cmsg, u8 * msg)
 502 {
 503         cmsg->m = msg;
 504         cmsg->l = 8;
 505         cmsg->p = 0;
 506         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 507
 508         pars_2_message(cmsg);
 509
 510         wordTLcpy(msg + 0, &cmsg->l);
 511         byteTLcpy(cmsg->m + 4, &cmsg->Command);
 512         byteTLcpy(cmsg->m + 5, &cmsg->Subcommand);
 513         wordTLcpy(cmsg->m + 2, &cmsg->ApplId);
 514         wordTLcpy(cmsg->m + 6, &cmsg->Messagenumber);
 515
 516         return 0;
 517 }
 518
 519 /*-------------------------------------------------------*/
 520 static void message_2_pars(_cmsg * cmsg)
 521 {
 522         for (; TYP != _CEND; cmsg->p++) {
 523
 524                 switch (TYP) {
 525                 case _CBYTE:
 526                         byteTRcpy(cmsg->m + cmsg->l, OFF);
 527                         cmsg->l++;
 528                         break;
 529                 case _CWORD:
 530                         wordTRcpy(cmsg->m + cmsg->l, OFF);
 531                         cmsg->l += 2;
 532                         break;
 533                 case _CDWORD:
 534                         dwordTRcpy(cmsg->m + cmsg->l, OFF);
 535                         cmsg->l += 4;
 536                         break;
 537                 case _CSTRUCT:
 538                         *(u8 **) OFF = cmsg->m + cmsg->l;
 539
 540                         if (cmsg->m[cmsg->l] != 0xff)
 541                                 cmsg->l += 1 + cmsg->m[cmsg->l];
 542                         else
 543                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
 544                         break;
 545                 case _CMSTRUCT:
 546 /*----- Metastruktur 0 -----*/
 547                         if (cmsg->m[cmsg->l] == '\0') {
 548                                 *(_cmstruct *) OFF = CAPI_DEFAULT;
 549                                 cmsg->l++;
 550                                 jumpcstruct(cmsg);
 551                         } else {
 552                                 unsigned _l = cmsg->l;
 553                                 *(_cmstruct *) OFF = CAPI_COMPOSE;
 554                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
 555                                 cmsg->p++;
 556                                 message_2_pars(cmsg);
 557                         }
 558                         break;
 559                 }
 560         }
 561 }
 562
 563 /**
 564  * capi_message2cmsg() - disassemble CAPI 2.0 message into _cmsg structure
 565  * @cmsg:       _cmsg structure
 566  * @msg:        buffer for assembled message
 567  *
 568  * Return value: 0 for success
 569  */
 570
 571 unsigned capi_message2cmsg(_cmsg * cmsg, u8 * msg)
 572 {
 573         memset(cmsg, 0, sizeof(_cmsg));
 574         cmsg->m = msg;
 575         cmsg->l = 8;
 576         cmsg->p = 0;
 577         byteTRcpy(cmsg->m + 4, &cmsg->Command);
 578         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
 579         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 580
 581         message_2_pars(cmsg);
 582
 583         wordTRcpy(msg + 0, &cmsg->l);
 584         wordTRcpy(cmsg->m + 2, &cmsg->ApplId);
 585         wordTRcpy(cmsg->m + 6, &cmsg->Messagenumber);
 586
 587         return 0;
 588 }
 589
 590 /**
 591  * capi_cmsg_header() - initialize header part of _cmsg structure
 592  * @cmsg:       _cmsg structure
 593  * @_ApplId:    ApplID field value
 594  * @_Command:   Command field value
 595  * @_Subcommand:        Subcommand field value
 596  * @_Messagenumber:     Message Number field value
 597  * @_Controller:        Controller/PLCI/NCCI field value
 598  *
 599  * Return value: 0 for success
 600  */
 601
 602 unsigned capi_cmsg_header(_cmsg * cmsg, u16 _ApplId,
 603                           u8 _Command, u8 _Subcommand,
 604                           u16 _Messagenumber, u32 _Controller)
 605 {
 606         memset(cmsg, 0, sizeof(_cmsg));
 607         cmsg->ApplId = _ApplId;
 608         cmsg->Command = _Command;
 609         cmsg->Subcommand = _Subcommand;
 610         cmsg->Messagenumber = _Messagenumber;
 611         cmsg->adr.adrController = _Controller;
 612         return 0;
 613 }
 614
 615 /*-------------------------------------------------------*/
 616
 617 static char *mnames[] =
 618 {
 619         [0x01] = "ALERT_REQ",
 620         [0x02] = "CONNECT_REQ",
 621         [0x04] = "DISCONNECT_REQ",
 622         [0x05] = "LISTEN_REQ",
 623         [0x08] = "INFO_REQ",
 624         [0x09] = "FACILITY_REQ",
 625         [0x0a] = "SELECT_B_PROTOCOL_REQ",
 626         [0x0b] = "CONNECT_B3_REQ",
 627         [0x0d] = "DISCONNECT_B3_REQ",
 628         [0x0f] = "DATA_B3_REQ",
 629         [0x10] = "RESET_B3_REQ",
 630         [0x13] = "ALERT_CONF",
 631         [0x14] = "CONNECT_CONF",
 632         [0x16] = "DISCONNECT_CONF",
 633         [0x17] = "LISTEN_CONF",
 634         [0x18] = "MANUFACTURER_REQ",
 635         [0x1a] = "INFO_CONF",
 636         [0x1b] = "FACILITY_CONF",
 637         [0x1c] = "SELECT_B_PROTOCOL_CONF",
 638         [0x1d] = "CONNECT_B3_CONF",
 639         [0x1f] = "DISCONNECT_B3_CONF",
 640         [0x21] = "DATA_B3_CONF",
 641         [0x22] = "RESET_B3_CONF",
 642         [0x26] = "CONNECT_IND",
 643         [0x27] = "CONNECT_ACTIVE_IND",
 644         [0x28] = "DISCONNECT_IND",
 645         [0x2a] = "MANUFACTURER_CONF",
 646         [0x2c] = "INFO_IND",
 647         [0x2d] = "FACILITY_IND",
 648         [0x2f] = "CONNECT_B3_IND",
 649         [0x30] = "CONNECT_B3_ACTIVE_IND",
 650         [0x31] = "DISCONNECT_B3_IND",
 651         [0x33] = "DATA_B3_IND",
 652         [0x34] = "RESET_B3_IND",
 653         [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
 654         [0x38] = "CONNECT_RESP",
 655         [0x39] = "CONNECT_ACTIVE_RESP",
 656         [0x3a] = "DISCONNECT_RESP",
 657         [0x3c] = "MANUFACTURER_IND",
 658         [0x3e] = "INFO_RESP",
 659         [0x3f] = "FACILITY_RESP",
 660         [0x41] = "CONNECT_B3_RESP",
 661         [0x42] = "CONNECT_B3_ACTIVE_RESP",
 662         [0x43] = "DISCONNECT_B3_RESP",
 663         [0x45] = "DATA_B3_RESP",
 664         [0x46] = "RESET_B3_RESP",
 665         [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
 666         [0x4e] = "MANUFACTURER_RESP"
 667 };
 668
 669 /**
 670  * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
 671  * @cmd:        command number
 672  * @subcmd:     subcommand number
 673  *
 674  * Return value: static string, NULL if command/subcommand unknown
 675  */
 676
 677 char *capi_cmd2str(u8 cmd, u8 subcmd)
 678 {
 679         return mnames[command_2_index(cmd, subcmd)];
 680 }
 681
 682
 683 /*-------------------------------------------------------*/
 684
 685 #ifdef CONFIG_CAPI_TRACE
 686
 687 /*-------------------------------------------------------*/
 688
 689 static char *pnames[] =
 690 {
 691     /*00 */ NULL,
 692     /*01 */ NULL,
 693     /*02 */ NULL,
 694     /*03 */ "Controller/PLCI/NCCI",
 695     /*04 */ "AdditionalInfo",
 696     /*05 */ "B1configuration",
 697     /*06 */ "B1protocol",
 698     /*07 */ "B2configuration",
 699     /*08 */ "B2protocol",
 700     /*09 */ "B3configuration",
 701     /*0a */ "B3protocol",
 702     /*0b */ "BC",
 703     /*0c */ "BChannelinformation",
 704     /*0d */ "BProtocol",
 705     /*0e */ "CalledPartyNumber",
 706     /*0f */ "CalledPartySubaddress",
 707     /*10 */ "CallingPartyNumber",
 708     /*11 */ "CallingPartySubaddress",
 709     /*12 */ "CIPmask",
 710     /*13 */ "CIPmask2",
 711     /*14 */ "CIPValue",
 712     /*15 */ "Class",
 713     /*16 */ "ConnectedNumber",
 714     /*17 */ "ConnectedSubaddress",
 715     /*18 */ "Data32",
 716     /*19 */ "DataHandle",
 717     /*1a */ "DataLength",
 718     /*1b */ "FacilityConfirmationParameter",
 719     /*1c */ "Facilitydataarray",
 720     /*1d */ "FacilityIndicationParameter",
 721     /*1e */ "FacilityRequestParameter",
 722     /*1f */ "FacilitySelector",
 723     /*20 */ "Flags",
 724     /*21 */ "Function",
 725     /*22 */ "HLC",
 726     /*23 */ "Info",
 727     /*24 */ "InfoElement",
 728     /*25 */ "InfoMask",
 729     /*26 */ "InfoNumber",
 730     /*27 */ "Keypadfacility",
 731     /*28 */ "LLC",
 732     /*29 */ "ManuData",
 733     /*2a */ "ManuID",
 734     /*2b */ "NCPI",
 735     /*2c */ "Reason",
 736     /*2d */ "Reason_B3",
 737     /*2e */ "Reject",
 738     /*2f */ "Useruserdata"
 739 };
 740
 741
 742
 743 #include <stdarg.h>
 744
 745 /*-------------------------------------------------------*/
 746 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt,...)
 747 {
 748         va_list f;
 749         size_t n,r;
 750
 751         if (!cdb)
 752                 return NULL;
 753         va_start(f, fmt);
 754         r = cdb->size - cdb->pos;
 755         n = vsnprintf(cdb->p, r, fmt, f);
 756         va_end(f);
 757         if (n >= r) {
 758                 /* truncated, need bigger buffer */
 759                 size_t ns = 2 * cdb->size;
 760                 u_char *nb;
 761
 762                 while ((ns - cdb->pos) <= n)
 763                         ns *= 2;
 764                 nb = kmalloc(ns, GFP_ATOMIC);
 765                 if (!nb) {
 766                         cdebbuf_free(cdb);
 767                         return NULL;
 768                 }
 769                 memcpy(nb, cdb->buf, cdb->pos);
 770                 kfree(cdb->buf);
 771                 nb[cdb->pos] = 0;
 772                 cdb->buf = nb;
 773                 cdb->p = cdb->buf + cdb->pos;
 774                 cdb->size = ns;
 775                 va_start(f, fmt);
 776                 r = cdb->size - cdb->pos;
 777                 n = vsnprintf(cdb->p, r, fmt, f);
 778                 va_end(f);
 779         }
 780         cdb->p += n;
 781         cdb->pos += n;
 782         return cdb;
 783 }
 784
 785 static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 * m, unsigned len)
 786 {
 787         unsigned hex = 0;
 788
 789         if (!cdb)
 790                 return NULL;
 791         for (; len; len--, m++)
 792                 if (isalnum(*m) || *m == ' ') {
 793                         if (hex)
 794                                 cdb = bufprint(cdb, ">");
 795                         cdb = bufprint(cdb, "%c", *m);
 796                         hex = 0;
 797                 } else {
 798                         if (!hex)
 799                                 cdb = bufprint(cdb, "<%02x", *m);
 800                         else
 801                                 cdb = bufprint(cdb, " %02x", *m);
 802                         hex = 1;
 803                 }
 804         if (hex)
 805                 cdb = bufprint(cdb, ">");
 806         return cdb;
 807 }
 808
 809 static _cdebbuf *printstruct(_cdebbuf *cdb, u8 * m)
 810 {
 811         unsigned len;
 812
 813         if (m[0] != 0xff) {
 814                 len = m[0];
 815                 m += 1;
 816         } else {
 817                 len = ((u16 *) (m + 1))[0];
 818                 m += 3;
 819         }
 820         cdb = printstructlen(cdb, m, len);
 821         return cdb;
 822 }
 823
 824 /*-------------------------------------------------------*/
 825 #define NAME (pnames[cmsg->par[cmsg->p]])
 826
 827 static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
 828 {
 829         for (; TYP != _CEND; cmsg->p++) {
 830                 int slen = 29 + 3 - level;
 831                 int i;
 832
 833                 if (!cdb)
 834                         return NULL;
 835                 cdb = bufprint(cdb, "  ");
 836                 for (i = 0; i < level - 1; i++)
 837                         cdb = bufprint(cdb, " ");
 838
 839                 switch (TYP) {
 840                 case _CBYTE:
 841                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
 842                         cmsg->l++;
 843                         break;
 844                 case _CWORD:
 845                         cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
 846                         cmsg->l += 2;
 847                         break;
 848                 case _CDWORD:
 849                         cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
 850                         cmsg->l += 4;
 851                         break;
 852                 case _CSTRUCT:
 853                         cdb = bufprint(cdb, "%-*s = ", slen, NAME);
 854                         if (cmsg->m[cmsg->l] == '\0')
 855                                 cdb = bufprint(cdb, "default");
 856                         else
 857                                 cdb = printstruct(cdb, cmsg->m + cmsg->l);
 858                         cdb = bufprint(cdb, "\n");
 859                         if (cmsg->m[cmsg->l] != 0xff)
 860                                 cmsg->l += 1 + cmsg->m[cmsg->l];
 861                         else
 862                                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
 863
 864                         break;
 865
 866                 case _CMSTRUCT:
 867 /*----- Metastruktur 0 -----*/
 868                         if (cmsg->m[cmsg->l] == '\0') {
 869                                 cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
 870                                 cmsg->l++;
 871                                 jumpcstruct(cmsg);
 872                         } else {
 873                                 char *name = NAME;
 874                                 unsigned _l = cmsg->l;
 875                                 cdb = bufprint(cdb, "%-*s\n", slen, name);
 876                                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
 877                                 cmsg->p++;
 878                                 cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
 879                         }
 880                         break;
 881                 }
 882         }
 883         return cdb;
 884 }
 885 /*-------------------------------------------------------*/
 886
 887 static _cdebbuf *g_debbuf;
 888 static u_long g_debbuf_lock;
 889 static _cmsg *g_cmsg;
 890
 891 static _cdebbuf *cdebbuf_alloc(void)
 892 {
 893         _cdebbuf *cdb;
 894
 895         if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
 896                 cdb = g_debbuf;
 897                 goto init;
 898         } else
 899                 cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
 900         if (!cdb)
 901                 return NULL;
 902         cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
 903         if (!cdb->buf) {
 904                 kfree(cdb);
 905                 return NULL;
 906         }
 907         cdb->size = CDEBUG_SIZE;
 908 init:
 909         cdb->buf[0] = 0;
 910         cdb->p = cdb->buf;
 911         cdb->pos = 0;
 912         return cdb;
 913 }
 914
 915 /**
 916  * cdebbuf_free() - free CAPI debug buffer
 917  * @cdb:        buffer to free
 918  */
 919
 920 void cdebbuf_free(_cdebbuf *cdb)
 921 {
 922         if (likely(cdb == g_debbuf)) {
 923                 test_and_clear_bit(1, &g_debbuf_lock);
 924                 return;
 925         }
 926         if (likely(cdb))
 927                 kfree(cdb->buf);
 928         kfree(cdb);
 929 }
 930
 931
 932 /**
 933  * capi_message2str() - format CAPI 2.0 message for printing
 934  * @msg:        CAPI 2.0 message
 935  *
 936  * Allocates a CAPI debug buffer and fills it with a printable representation
 937  * of the CAPI 2.0 message in @msg.
 938  * Return value: allocated debug buffer, NULL on error
 939  * The returned buffer should be freed by a call to cdebbuf_free() after use.
 940  */
 941
 942 _cdebbuf *capi_message2str(u8 * msg)
 943 {
 944         _cdebbuf *cdb;
 945         _cmsg   *cmsg;
 946
 947         cdb = cdebbuf_alloc();
 948         if (unlikely(!cdb))
 949                 return NULL;
 950         if (likely(cdb == g_debbuf))
 951                 cmsg = g_cmsg;
 952         else
 953                 cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
 954         if (unlikely(!cmsg)) {
 955                 cdebbuf_free(cdb);
 956                 return NULL;
 957         }
 958         cmsg->m = msg;
 959         cmsg->l = 8;
 960         cmsg->p = 0;
 961         byteTRcpy(cmsg->m + 4, &cmsg->Command);
 962         byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
 963         cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)];
 964
 965         cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
 966                  mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
 967                  ((unsigned short *) msg)[1],
 968                  ((unsigned short *) msg)[3],
 969                  ((unsigned short *) msg)[0]);
 970
 971         cdb = protocol_message_2_pars(cdb, cmsg, 1);
 972         if (unlikely(cmsg != g_cmsg))
 973                 kfree(cmsg);
 974         return cdb;
 975 }
 976
 977 /**
 978  * capi_cmsg2str() - format _cmsg structure for printing
 979  * @cmsg:       _cmsg structure
 980  *
 981  * Allocates a CAPI debug buffer and fills it with a printable representation
 982  * of the CAPI 2.0 message stored in @cmsg by a previous call to
 983  * capi_cmsg2message() or capi_message2cmsg().
 984  * Return value: allocated debug buffer, NULL on error
 985  * The returned buffer should be freed by a call to cdebbuf_free() after use.
 986  */
 987
 988 _cdebbuf *capi_cmsg2str(_cmsg * cmsg)
 989 {
 990         _cdebbuf *cdb;
 991
 992         if (!cmsg->m)
 993                 return NULL;    /* no message */
 994         cdb = cdebbuf_alloc();
 995         if (!cdb)
 996                 return NULL;
 997         cmsg->l = 8;
 998         cmsg->p = 0;
 999         cdb = bufprint(cdb, "%s ID=%03d #0x%04x LEN=%04d\n",
1000                  mnames[command_2_index(cmsg->Command, cmsg->Subcommand)],
1001                  ((u16 *) cmsg->m)[1],
1002                  ((u16 *) cmsg->m)[3],
1003                  ((u16 *) cmsg->m)[0]);
1004         cdb = protocol_message_2_pars(cdb, cmsg, 1);
1005         return cdb;
1006 }
1007
1008 int __init cdebug_init(void)
1009 {
1010         g_cmsg= kmalloc(sizeof(_cmsg), GFP_KERNEL);
1011         if (!g_cmsg)
1012                 return -ENOMEM;
1013         g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
1014         if (!g_debbuf) {
1015                 kfree(g_cmsg);
1016                 return -ENOMEM;
1017         }
1018         g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
1019         if (!g_debbuf->buf) {
1020                 kfree(g_cmsg);
1021                 kfree(g_debbuf);
1022                 return -ENOMEM;
1023         }
1024         g_debbuf->size = CDEBUG_GSIZE;
1025         g_debbuf->buf[0] = 0;
1026         g_debbuf->p = g_debbuf->buf;
1027         g_debbuf->pos = 0;
1028         return 0;
1029 }
1030
1031 void __exit cdebug_exit(void)
1032 {
1033         if (g_debbuf)
1034                 kfree(g_debbuf->buf);
1035         kfree(g_debbuf);
1036         kfree(g_cmsg);
1037 }
1038
1039 #else /* !CONFIG_CAPI_TRACE */
1040
1041 static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
1042
1043 _cdebbuf *capi_message2str(u8 * msg)
1044 {
1045         return &g_debbuf;
1046 }
1047
1048 _cdebbuf *capi_cmsg2str(_cmsg * cmsg)
1049 {
1050         return &g_debbuf;
1051 }
1052
1053 void cdebbuf_free(_cdebbuf *cdb)
1054 {
1055 }
1056
1057 int __init cdebug_init(void)
1058 {
1059         return 0;
1060 }
1061
1062 void __exit cdebug_exit(void)
1063 {
1064 }
1065
1066 #endif
1067
1068 EXPORT_SYMBOL(cdebbuf_free);
1069 EXPORT_SYMBOL(capi_cmsg2message);
1070 EXPORT_SYMBOL(capi_message2cmsg);
1071 EXPORT_SYMBOL(capi_cmsg_header);
1072 EXPORT_SYMBOL(capi_cmd2str);
1073 EXPORT_SYMBOL(capi_cmsg2str);
1074 EXPORT_SYMBOL(capi_message2str);
1075 EXPORT_SYMBOL(capi_info2str);