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#include <linux/slab.h>
  22
  23#include "kcapi.h"
  24
  25/* from CAPI2.0 DDK AVM Berlin GmbH */
  26
  27typedef struct {
  28        int typ;
  29        size_t off;
  30} _cdef;
  31
  32#define _CBYTE         1
  33#define _CWORD         2
  34#define _CDWORD        3
  35#define _CSTRUCT       4
  36#define _CMSTRUCT      5
  37#define _CEND          6
  38
  39static _cdef cdef[] =
  40{
  41        /*00 */
  42        {_CEND},
  43        /*01 */
  44        {_CEND},
  45        /*02 */
  46        {_CEND},
  47        /*03 */
  48        {_CDWORD, offsetof(_cmsg, adr.adrController)},
  49        /*04 */
  50        {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
  51        /*05 */
  52        {_CSTRUCT, offsetof(_cmsg, B1configuration)},
  53        /*06 */
  54        {_CWORD, offsetof(_cmsg, B1protocol)},
  55        /*07 */
  56        {_CSTRUCT, offsetof(_cmsg, B2configuration)},
  57        /*08 */
  58        {_CWORD, offsetof(_cmsg, B2protocol)},
  59        /*09 */
  60        {_CSTRUCT, offsetof(_cmsg, B3configuration)},
  61        /*0a */
  62        {_CWORD, offsetof(_cmsg, B3protocol)},
  63        /*0b */
  64        {_CSTRUCT, offsetof(_cmsg, BC)},
  65        /*0c */
  66        {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
  67        /*0d */
  68        {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
  69        /*0e */
  70        {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
  71        /*0f */
  72        {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
  73        /*10 */
  74        {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
  75        /*11 */
  76        {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
  77        /*12 */
  78        {_CDWORD, offsetof(_cmsg, CIPmask)},
  79        /*13 */
  80        {_CDWORD, offsetof(_cmsg, CIPmask2)},
  81        /*14 */
  82        {_CWORD, offsetof(_cmsg, CIPValue)},
  83        /*15 */
  84        {_CDWORD, offsetof(_cmsg, Class)},
  85        /*16 */
  86        {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
  87        /*17 */
  88        {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
  89        /*18 */
  90        {_CDWORD, offsetof(_cmsg, Data)},
  91        /*19 */
  92        {_CWORD, offsetof(_cmsg, DataHandle)},
  93        /*1a */
  94        {_CWORD, offsetof(_cmsg, DataLength)},
  95        /*1b */
  96        {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
  97        /*1c */
  98        {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
  99        /*1d */
 100        {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
 101        /*1e */
 102        {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
 103        /*1f */
 104        {_CWORD, offsetof(_cmsg, FacilitySelector)},
 105        /*20 */
 106        {_CWORD, offsetof(_cmsg, Flags)},
 107        /*21 */
 108        {_CDWORD, offsetof(_cmsg, Function)},
 109        /*22 */
 110        {_CSTRUCT, offsetof(_cmsg, HLC)},
 111        /*23 */
 112        {_CWORD, offsetof(_cmsg, Info)},
 113        /*24 */
 114        {_CSTRUCT, offsetof(_cmsg, InfoElement)},
 115        /*25 */
 116        {_CDWORD, offsetof(_cmsg, InfoMask)},
 117        /*26 */
 118        {_CWORD, offsetof(_cmsg, InfoNumber)},
 119        /*27 */
 120        {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
 121        /*28 */
 122        {_CSTRUCT, offsetof(_cmsg, LLC)},
 123        /*29 */
 124        {_CSTRUCT, offsetof(_cmsg, ManuData)},
 125        /*2a */
 126        {_CDWORD, offsetof(_cmsg, ManuID)},
 127        /*2b */
 128        {_CSTRUCT, offsetof(_cmsg, NCPI)},
 129        /*2c */
 130        {_CWORD, offsetof(_cmsg, Reason)},
 131        /*2d */
 132        {_CWORD, offsetof(_cmsg, Reason_B3)},
 133        /*2e */
 134        {_CWORD, offsetof(_cmsg, Reject)},
 135        /*2f */
 136        {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
 137};
 138
 139static unsigned char *cpars[] =
 140{
 141        /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
 142        /* 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",
 143        /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
 144        /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
 145        /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
 146        /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
 147        /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
 148        /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
 149        /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
 150        /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
 151        /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
 152        /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
 153        /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
 154        /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
 155        /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
 156        /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
 157        /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
 158        /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
 159        /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
 160        /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
 161        /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
 162        /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
 163        /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
 164        /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
 165        /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
 166        /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
 167        /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
 168        /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
 169        /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
 170        /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
 171        /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
 172        /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
 173        /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
 174        /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
 175        /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
 176        /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
 177        /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
 178        /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
 179        /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
 180        /* INFO_RESP */ [0x3e] = "\x03\x01",
 181        /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
 182        /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
 183        /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
 184        /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
 185        /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
 186        /* RESET_B3_RESP */ [0x46] = "\x03\x01",
 187        /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
 188        /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
 189};
 190
 191/*-------------------------------------------------------*/
 192
 193#define byteTLcpy(x, y)         *(u8 *)(x) = *(u8 *)(y);
 194#define wordTLcpy(x, y)         *(u16 *)(x) = *(u16 *)(y);
 195#define dwordTLcpy(x, y)        memcpy(x, y, 4);
 196#define structTLcpy(x, y, l)    memcpy(x, y, l)
 197#define structTLcpyovl(x, y, l) memmove(x, y, l)
 198
 199#define byteTRcpy(x, y)         *(u8 *)(y) = *(u8 *)(x);
 200#define wordTRcpy(x, y)         *(u16 *)(y) = *(u16 *)(x);
 201#define dwordTRcpy(x, y)        memcpy(y, x, 4);
 202#define structTRcpy(x, y, l)    memcpy(y, x, l)
 203#define structTRcpyovl(x, y, l) memmove(y, x, l)
 204
 205/*-------------------------------------------------------*/
 206static unsigned command_2_index(u8 c, u8 sc)
 207{
 208        if (c & 0x80)
 209                c = 0x9 + (c & 0x0f);
 210        else if (c == 0x41)
 211                c = 0x9 + 0x1;
 212        if (c > 0x18)
 213                c = 0x00;
 214        return (sc & 3) * (0x9 + 0x9) + c;
 215}
 216
 217/**
 218 * capi_cmd2par() - find parameter string for CAPI 2.0 command/subcommand
 219 * @cmd:        command number
 220 * @subcmd:     subcommand number
 221 *
 222 * Return value: static string, NULL if command/subcommand unknown
 223 */
 224
 225static unsigned char *capi_cmd2par(u8 cmd, u8 subcmd)
 226{
 227        return cpars[command_2_index(cmd, subcmd)];
 228}
 229
 230/*-------------------------------------------------------*/
 231#define TYP (cdef[cmsg->par[cmsg->p]].typ)
 232#define OFF (((u8 *)cmsg) + cdef[cmsg->par[cmsg->p]].off)
 233
 234static void jumpcstruct(_cmsg *cmsg)
 235{
 236        unsigned layer;
 237        for (cmsg->p++, layer = 1; layer;) {
 238                /* $$$$$ assert (cmsg->p); */
 239                cmsg->p++;
 240                switch (TYP) {
 241                case _CMSTRUCT:
 242                        layer++;
 243                        break;
 244                case _CEND:
 245                        layer--;
 246                        break;
 247                }
 248        }
 249}
 250
 251/*-------------------------------------------------------*/
 252
 253static char *mnames[] =
 254{
 255        [0x01] = "ALERT_REQ",
 256        [0x02] = "CONNECT_REQ",
 257        [0x04] = "DISCONNECT_REQ",
 258        [0x05] = "LISTEN_REQ",
 259        [0x08] = "INFO_REQ",
 260        [0x09] = "FACILITY_REQ",
 261        [0x0a] = "SELECT_B_PROTOCOL_REQ",
 262        [0x0b] = "CONNECT_B3_REQ",
 263        [0x0d] = "DISCONNECT_B3_REQ",
 264        [0x0f] = "DATA_B3_REQ",
 265        [0x10] = "RESET_B3_REQ",
 266        [0x13] = "ALERT_CONF",
 267        [0x14] = "CONNECT_CONF",
 268        [0x16] = "DISCONNECT_CONF",
 269        [0x17] = "LISTEN_CONF",
 270        [0x18] = "MANUFACTURER_REQ",
 271        [0x1a] = "INFO_CONF",
 272        [0x1b] = "FACILITY_CONF",
 273        [0x1c] = "SELECT_B_PROTOCOL_CONF",
 274        [0x1d] = "CONNECT_B3_CONF",
 275        [0x1f] = "DISCONNECT_B3_CONF",
 276        [0x21] = "DATA_B3_CONF",
 277        [0x22] = "RESET_B3_CONF",
 278        [0x26] = "CONNECT_IND",
 279        [0x27] = "CONNECT_ACTIVE_IND",
 280        [0x28] = "DISCONNECT_IND",
 281        [0x2a] = "MANUFACTURER_CONF",
 282        [0x2c] = "INFO_IND",
 283        [0x2d] = "FACILITY_IND",
 284        [0x2f] = "CONNECT_B3_IND",
 285        [0x30] = "CONNECT_B3_ACTIVE_IND",
 286        [0x31] = "DISCONNECT_B3_IND",
 287        [0x33] = "DATA_B3_IND",
 288        [0x34] = "RESET_B3_IND",
 289        [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
 290        [0x38] = "CONNECT_RESP",
 291        [0x39] = "CONNECT_ACTIVE_RESP",
 292        [0x3a] = "DISCONNECT_RESP",
 293        [0x3c] = "MANUFACTURER_IND",
 294        [0x3e] = "INFO_RESP",
 295        [0x3f] = "FACILITY_RESP",
 296        [0x41] = "CONNECT_B3_RESP",
 297        [0x42] = "CONNECT_B3_ACTIVE_RESP",
 298        [0x43] = "DISCONNECT_B3_RESP",
 299        [0x45] = "DATA_B3_RESP",
 300        [0x46] = "RESET_B3_RESP",
 301        [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
 302        [0x4e] = "MANUFACTURER_RESP"
 303};
 304
 305/**
 306 * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
 307 * @cmd:        command number
 308 * @subcmd:     subcommand number
 309 *
 310 * Return value: static string
 311 */
 312
 313char *capi_cmd2str(u8 cmd, u8 subcmd)
 314{
 315        char *result;
 316
 317        result = mnames[command_2_index(cmd, subcmd)];
 318        if (result == NULL)
 319                result = "INVALID_COMMAND";
 320        return result;
 321}
 322
 323
 324/*-------------------------------------------------------*/
 325
 326#ifdef CONFIG_CAPI_TRACE
 327
 328/*-------------------------------------------------------*/
 329
 330static char *pnames[] =
 331{
 332        /*00 */ NULL,
 333        /*01 */ NULL,
 334        /*02 */ NULL,
 335        /*03 */ "Controller/PLCI/NCCI",
 336        /*04 */ "AdditionalInfo",
 337        /*05 */ "B1configuration",
 338        /*06 */ "B1protocol",
 339        /*07 */ "B2configuration",
 340        /*08 */ "B2protocol",
 341        /*09 */ "B3configuration",
 342        /*0a */ "B3protocol",
 343        /*0b */ "BC",
 344        /*0c */ "BChannelinformation",
 345        /*0d */ "BProtocol",
 346        /*0e */ "CalledPartyNumber",
 347        /*0f */ "CalledPartySubaddress",
 348        /*10 */ "CallingPartyNumber",
 349        /*11 */ "CallingPartySubaddress",
 350        /*12 */ "CIPmask",
 351        /*13 */ "CIPmask2",
 352        /*14 */ "CIPValue",
 353        /*15 */ "Class",
 354        /*16 */ "ConnectedNumber",
 355        /*17 */ "ConnectedSubaddress",
 356        /*18 */ "Data32",
 357        /*19 */ "DataHandle",
 358        /*1a */ "DataLength",
 359        /*1b */ "FacilityConfirmationParameter",
 360        /*1c */ "Facilitydataarray",
 361        /*1d */ "FacilityIndicationParameter",
 362        /*1e */ "FacilityRequestParameter",
 363        /*1f */ "FacilitySelector",
 364        /*20 */ "Flags",
 365        /*21 */ "Function",
 366        /*22 */ "HLC",
 367        /*23 */ "Info",
 368        /*24 */ "InfoElement",
 369        /*25 */ "InfoMask",
 370        /*26 */ "InfoNumber",
 371        /*27 */ "Keypadfacility",
 372        /*28 */ "LLC",
 373        /*29 */ "ManuData",
 374        /*2a */ "ManuID",
 375        /*2b */ "NCPI",
 376        /*2c */ "Reason",
 377        /*2d */ "Reason_B3",
 378        /*2e */ "Reject",
 379        /*2f */ "Useruserdata"
 380};
 381
 382#include <stdarg.h>
 383
 384/*-------------------------------------------------------*/
 385static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt, ...)
 386{
 387        va_list f;
 388        size_t n, r;
 389
 390        if (!cdb)
 391                return NULL;
 392        va_start(f, fmt);
 393        r = cdb->size - cdb->pos;
 394        n = vsnprintf(cdb->p, r, fmt, f);
 395        va_end(f);
 396        if (n >= r) {
 397                /* truncated, need bigger buffer */
 398                size_t ns = 2 * cdb->size;
 399                u_char *nb;
 400
 401                while ((ns - cdb->pos) <= n)
 402                        ns *= 2;
 403                nb = kmalloc(ns, GFP_ATOMIC);
 404                if (!nb) {
 405                        cdebbuf_free(cdb);
 406                        return NULL;
 407                }
 408                memcpy(nb, cdb->buf, cdb->pos);
 409                kfree(cdb->buf);
 410                nb[cdb->pos] = 0;
 411                cdb->buf = nb;
 412                cdb->p = cdb->buf + cdb->pos;
 413                cdb->size = ns;
 414                va_start(f, fmt);
 415                r = cdb->size - cdb->pos;
 416                n = vsnprintf(cdb->p, r, fmt, f);
 417                va_end(f);
 418        }
 419        cdb->p += n;
 420        cdb->pos += n;
 421        return cdb;
 422}
 423
 424static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 *m, unsigned len)
 425{
 426        unsigned hex = 0;
 427
 428        if (!cdb)
 429                return NULL;
 430        for (; len; len--, m++)
 431                if (isalnum(*m) || *m == ' ') {
 432                        if (hex)
 433                                cdb = bufprint(cdb, ">");
 434                        cdb = bufprint(cdb, "%c", *m);
 435                        hex = 0;
 436                } else {
 437                        if (!hex)
 438                                cdb = bufprint(cdb, "<%02x", *m);
 439                        else
 440                                cdb = bufprint(cdb, " %02x", *m);
 441                        hex = 1;
 442                }
 443        if (hex)
 444                cdb = bufprint(cdb, ">");
 445        return cdb;
 446}
 447
 448static _cdebbuf *printstruct(_cdebbuf *cdb, u8 *m)
 449{
 450        unsigned len;
 451
 452        if (m[0] != 0xff) {
 453                len = m[0];
 454                m += 1;
 455        } else {
 456                len = ((u16 *) (m + 1))[0];
 457                m += 3;
 458        }
 459        cdb = printstructlen(cdb, m, len);
 460        return cdb;
 461}
 462
 463/*-------------------------------------------------------*/
 464#define NAME (pnames[cmsg->par[cmsg->p]])
 465
 466static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
 467{
 468        if (!cmsg->par)
 469                return NULL;    /* invalid command/subcommand */
 470
 471        for (; TYP != _CEND; cmsg->p++) {
 472                int slen = 29 + 3 - level;
 473                int i;
 474
 475                if (!cdb)
 476                        return NULL;
 477                cdb = bufprint(cdb, "  ");
 478                for (i = 0; i < level - 1; i++)
 479                        cdb = bufprint(cdb, " ");
 480
 481                switch (TYP) {
 482                case _CBYTE:
 483                        cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
 484                        cmsg->l++;
 485                        break;
 486                case _CWORD:
 487                        cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
 488                        cmsg->l += 2;
 489                        break;
 490                case _CDWORD:
 491                        cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
 492                        cmsg->l += 4;
 493                        break;
 494                case _CSTRUCT:
 495                        cdb = bufprint(cdb, "%-*s = ", slen, NAME);
 496                        if (cmsg->m[cmsg->l] == '\0')
 497                                cdb = bufprint(cdb, "default");
 498                        else
 499                                cdb = printstruct(cdb, cmsg->m + cmsg->l);
 500                        cdb = bufprint(cdb, "\n");
 501                        if (cmsg->m[cmsg->l] != 0xff)
 502                                cmsg->l += 1 + cmsg->m[cmsg->l];
 503                        else
 504                                cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
 505
 506                        break;
 507
 508                case _CMSTRUCT:
 509/*----- Metastruktur 0 -----*/
 510                        if (cmsg->m[cmsg->l] == '\0') {
 511                                cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
 512                                cmsg->l++;
 513                                jumpcstruct(cmsg);
 514                        } else {
 515                                char *name = NAME;
 516                                unsigned _l = cmsg->l;
 517                                cdb = bufprint(cdb, "%-*s\n", slen, name);
 518                                cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
 519                                cmsg->p++;
 520                                cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
 521                        }
 522                        break;
 523                }
 524        }
 525        return cdb;
 526}
 527/*-------------------------------------------------------*/
 528
 529static _cdebbuf *g_debbuf;
 530static u_long g_debbuf_lock;
 531static _cmsg *g_cmsg;
 532
 533static _cdebbuf *cdebbuf_alloc(void)
 534{
 535        _cdebbuf *cdb;
 536
 537        if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
 538                cdb = g_debbuf;
 539                goto init;
 540        } else
 541                cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
 542        if (!cdb)
 543                return NULL;
 544        cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
 545        if (!cdb->buf) {
 546                kfree(cdb);
 547                return NULL;
 548        }
 549        cdb->size = CDEBUG_SIZE;
 550init:
 551        cdb->buf[0] = 0;
 552        cdb->p = cdb->buf;
 553        cdb->pos = 0;
 554        return cdb;
 555}
 556
 557/**
 558 * cdebbuf_free() - free CAPI debug buffer
 559 * @cdb:        buffer to free
 560 */
 561
 562void cdebbuf_free(_cdebbuf *cdb)
 563{
 564        if (likely(cdb == g_debbuf)) {
 565                test_and_clear_bit(1, &g_debbuf_lock);
 566                return;
 567        }
 568        if (likely(cdb))
 569                kfree(cdb->buf);
 570        kfree(cdb);
 571}
 572
 573
 574/**
 575 * capi_message2str() - format CAPI 2.0 message for printing
 576 * @msg:        CAPI 2.0 message
 577 *
 578 * Allocates a CAPI debug buffer and fills it with a printable representation
 579 * of the CAPI 2.0 message in @msg.
 580 * Return value: allocated debug buffer, NULL on error
 581 * The returned buffer should be freed by a call to cdebbuf_free() after use.
 582 */
 583
 584_cdebbuf *capi_message2str(u8 *msg)
 585{
 586        _cdebbuf *cdb;
 587        _cmsg   *cmsg;
 588
 589        cdb = cdebbuf_alloc();
 590        if (unlikely(!cdb))
 591                return NULL;
 592        if (likely(cdb == g_debbuf))
 593                cmsg = g_cmsg;
 594        else
 595                cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
 596        if (unlikely(!cmsg)) {
 597                cdebbuf_free(cdb);
 598                return NULL;
 599        }
 600        cmsg->m = msg;
 601        cmsg->l = 8;
 602        cmsg->p = 0;
 603        byteTRcpy(cmsg->m + 4, &cmsg->Command);
 604        byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
 605        cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand);
 606
 607        cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
 608                       capi_cmd2str(cmsg->Command, cmsg->Subcommand),
 609                       ((unsigned short *) msg)[1],
 610                       ((unsigned short *) msg)[3],
 611                       ((unsigned short *) msg)[0]);
 612
 613        cdb = protocol_message_2_pars(cdb, cmsg, 1);
 614        if (unlikely(cmsg != g_cmsg))
 615                kfree(cmsg);
 616        return cdb;
 617}
 618
 619int __init cdebug_init(void)
 620{
 621        g_cmsg = kmalloc(sizeof(_cmsg), GFP_KERNEL);
 622        if (!g_cmsg)
 623                return -ENOMEM;
 624        g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
 625        if (!g_debbuf) {
 626                kfree(g_cmsg);
 627                return -ENOMEM;
 628        }
 629        g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
 630        if (!g_debbuf->buf) {
 631                kfree(g_cmsg);
 632                kfree(g_debbuf);
 633                return -ENOMEM;
 634        }
 635        g_debbuf->size = CDEBUG_GSIZE;
 636        g_debbuf->buf[0] = 0;
 637        g_debbuf->p = g_debbuf->buf;
 638        g_debbuf->pos = 0;
 639        return 0;
 640}
 641
 642void cdebug_exit(void)
 643{
 644        if (g_debbuf)
 645                kfree(g_debbuf->buf);
 646        kfree(g_debbuf);
 647        kfree(g_cmsg);
 648}
 649
 650#else /* !CONFIG_CAPI_TRACE */
 651
 652static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
 653
 654_cdebbuf *capi_message2str(u8 *msg)
 655{
 656        return &g_debbuf;
 657}
 658
 659_cdebbuf *capi_cmsg2str(_cmsg *cmsg)
 660{
 661        return &g_debbuf;
 662}
 663
 664void cdebbuf_free(_cdebbuf *cdb)
 665{
 666}
 667
 668int __init cdebug_init(void)
 669{
 670        return 0;
 671}
 672
 673void cdebug_exit(void)
 674{
 675}
 676
 677#endif
 678