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
  27 typedef 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
  39 static _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
 139 static 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 /*-------------------------------------------------------*/
 206 static 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
 225 static 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
 234 static 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
 253 static 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
 313 char *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
 330 static 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 /*-------------------------------------------------------*/
 385 static _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
 424 static _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
 448 static _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
 466 static _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
 529 static _cdebbuf *g_debbuf;
 530 static u_long g_debbuf_lock;
 531 static _cmsg *g_cmsg;
 532
 533 static _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;
 550 init:
 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
 562 void 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
 619 int __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
 642 void 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
 652 static _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
 664 void cdebbuf_free(_cdebbuf *cdb)
 665 {
 666 }
 667
 668 int __init cdebug_init(void)
 669 {
 670         return 0;
 671 }
 672
 673 void cdebug_exit(void)
 674 {
 675 }
 676
 677 #endif