LXR linux/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
  25char *capi_info2str(u16 reason)
  26{
  27    return "..";
  28}
  29#else
  30char *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
 223typedef 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
 235static _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
 335static 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/*-------------------------------------------------------*/
 402static 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
 418static 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/*-------------------------------------------------------*/
 435static 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
 501unsigned 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/*-------------------------------------------------------*/
 520static 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
 571unsigned 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
 602unsigned 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
 617static 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
 677char *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
 689static 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/*-------------------------------------------------------*/
 746static _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
 785static _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
 809static _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
 827static _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
 887static _cdebbuf *g_debbuf;
 888static u_long g_debbuf_lock;
 889static _cmsg *g_cmsg;
 890
 891static _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;
 908init:
 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
 920void 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
1008int __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
1031void __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
1041static _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
1053void cdebbuf_free(_cdebbuf *cdb)
1054{
1055}
1056
1057int __init cdebug_init(void)
1058{
1059        return 0;
1060}
1061
1062void __exit cdebug_exit(void)
1063{
1064}
1065
1066#endif
1067
1068EXPORT_SYMBOL(cdebbuf_free);
1069EXPORT_SYMBOL(capi_cmsg2message);
1070EXPORT_SYMBOL(capi_message2cmsg);
1071EXPORT_SYMBOL(capi_cmsg_header);
1072EXPORT_SYMBOL(capi_cmd2str);
1073EXPORT_SYMBOL(capi_cmsg2str);
1074EXPORT_SYMBOL(capi_message2str);
1075EXPORT_SYMBOL(capi_info2str);
1076