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0001 /* $Id: capiutil.c,v 1.13.6.4 2001/09/23 22:24:33 kai Exp $
0002  *
0003  * CAPI 2.0 convert capi message to capi message struct
0004  *
0005  * From CAPI 2.0 Development Kit AVM 1995 (msg.c)
0006  * Rewritten for Linux 1996 by Carsten Paeth <calle@calle.de>
0007  *
0008  * This software may be used and distributed according to the terms
0009  * of the GNU General Public License, incorporated herein by reference.
0010  *
0011  */
0012 
0013 #include <linux/module.h>
0014 #include <linux/string.h>
0015 #include <linux/ctype.h>
0016 #include <linux/stddef.h>
0017 #include <linux/kernel.h>
0018 #include <linux/mm.h>
0019 #include <linux/init.h>
0020 #include <linux/isdn/capiutil.h>
0021 #include <linux/slab.h>
0022 
0023 #include "kcapi.h"
0024 
0025 /* from CAPI2.0 DDK AVM Berlin GmbH */
0026 
0027 typedef struct {
0028     int typ;
0029     size_t off;
0030 } _cdef;
0031 
0032 #define _CBYTE         1
0033 #define _CWORD         2
0034 #define _CDWORD        3
0035 #define _CSTRUCT       4
0036 #define _CMSTRUCT      5
0037 #define _CEND          6
0038 
0039 static _cdef cdef[] =
0040 {
0041     /*00 */
0042     {_CEND},
0043     /*01 */
0044     {_CEND},
0045     /*02 */
0046     {_CEND},
0047     /*03 */
0048     {_CDWORD, offsetof(_cmsg, adr.adrController)},
0049     /*04 */
0050     {_CMSTRUCT, offsetof(_cmsg, AdditionalInfo)},
0051     /*05 */
0052     {_CSTRUCT, offsetof(_cmsg, B1configuration)},
0053     /*06 */
0054     {_CWORD, offsetof(_cmsg, B1protocol)},
0055     /*07 */
0056     {_CSTRUCT, offsetof(_cmsg, B2configuration)},
0057     /*08 */
0058     {_CWORD, offsetof(_cmsg, B2protocol)},
0059     /*09 */
0060     {_CSTRUCT, offsetof(_cmsg, B3configuration)},
0061     /*0a */
0062     {_CWORD, offsetof(_cmsg, B3protocol)},
0063     /*0b */
0064     {_CSTRUCT, offsetof(_cmsg, BC)},
0065     /*0c */
0066     {_CSTRUCT, offsetof(_cmsg, BChannelinformation)},
0067     /*0d */
0068     {_CMSTRUCT, offsetof(_cmsg, BProtocol)},
0069     /*0e */
0070     {_CSTRUCT, offsetof(_cmsg, CalledPartyNumber)},
0071     /*0f */
0072     {_CSTRUCT, offsetof(_cmsg, CalledPartySubaddress)},
0073     /*10 */
0074     {_CSTRUCT, offsetof(_cmsg, CallingPartyNumber)},
0075     /*11 */
0076     {_CSTRUCT, offsetof(_cmsg, CallingPartySubaddress)},
0077     /*12 */
0078     {_CDWORD, offsetof(_cmsg, CIPmask)},
0079     /*13 */
0080     {_CDWORD, offsetof(_cmsg, CIPmask2)},
0081     /*14 */
0082     {_CWORD, offsetof(_cmsg, CIPValue)},
0083     /*15 */
0084     {_CDWORD, offsetof(_cmsg, Class)},
0085     /*16 */
0086     {_CSTRUCT, offsetof(_cmsg, ConnectedNumber)},
0087     /*17 */
0088     {_CSTRUCT, offsetof(_cmsg, ConnectedSubaddress)},
0089     /*18 */
0090     {_CDWORD, offsetof(_cmsg, Data)},
0091     /*19 */
0092     {_CWORD, offsetof(_cmsg, DataHandle)},
0093     /*1a */
0094     {_CWORD, offsetof(_cmsg, DataLength)},
0095     /*1b */
0096     {_CSTRUCT, offsetof(_cmsg, FacilityConfirmationParameter)},
0097     /*1c */
0098     {_CSTRUCT, offsetof(_cmsg, Facilitydataarray)},
0099     /*1d */
0100     {_CSTRUCT, offsetof(_cmsg, FacilityIndicationParameter)},
0101     /*1e */
0102     {_CSTRUCT, offsetof(_cmsg, FacilityRequestParameter)},
0103     /*1f */
0104     {_CWORD, offsetof(_cmsg, FacilitySelector)},
0105     /*20 */
0106     {_CWORD, offsetof(_cmsg, Flags)},
0107     /*21 */
0108     {_CDWORD, offsetof(_cmsg, Function)},
0109     /*22 */
0110     {_CSTRUCT, offsetof(_cmsg, HLC)},
0111     /*23 */
0112     {_CWORD, offsetof(_cmsg, Info)},
0113     /*24 */
0114     {_CSTRUCT, offsetof(_cmsg, InfoElement)},
0115     /*25 */
0116     {_CDWORD, offsetof(_cmsg, InfoMask)},
0117     /*26 */
0118     {_CWORD, offsetof(_cmsg, InfoNumber)},
0119     /*27 */
0120     {_CSTRUCT, offsetof(_cmsg, Keypadfacility)},
0121     /*28 */
0122     {_CSTRUCT, offsetof(_cmsg, LLC)},
0123     /*29 */
0124     {_CSTRUCT, offsetof(_cmsg, ManuData)},
0125     /*2a */
0126     {_CDWORD, offsetof(_cmsg, ManuID)},
0127     /*2b */
0128     {_CSTRUCT, offsetof(_cmsg, NCPI)},
0129     /*2c */
0130     {_CWORD, offsetof(_cmsg, Reason)},
0131     /*2d */
0132     {_CWORD, offsetof(_cmsg, Reason_B3)},
0133     /*2e */
0134     {_CWORD, offsetof(_cmsg, Reject)},
0135     /*2f */
0136     {_CSTRUCT, offsetof(_cmsg, Useruserdata)}
0137 };
0138 
0139 static unsigned char *cpars[] =
0140 {
0141     /* ALERT_REQ */ [0x01] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
0142     /* 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",
0143     /* DISCONNECT_REQ */ [0x04] = "\x03\x04\x0c\x27\x2f\x1c\x01\x01",
0144     /* LISTEN_REQ */ [0x05] = "\x03\x25\x12\x13\x10\x11\x01",
0145     /* INFO_REQ */ [0x08] = "\x03\x0e\x04\x0c\x27\x2f\x1c\x01\x01",
0146     /* FACILITY_REQ */ [0x09] = "\x03\x1f\x1e\x01",
0147     /* SELECT_B_PROTOCOL_REQ */ [0x0a] = "\x03\x0d\x06\x08\x0a\x05\x07\x09\x01\x01",
0148     /* CONNECT_B3_REQ */ [0x0b] = "\x03\x2b\x01",
0149     /* DISCONNECT_B3_REQ */ [0x0d] = "\x03\x2b\x01",
0150     /* DATA_B3_REQ */ [0x0f] = "\x03\x18\x1a\x19\x20\x01",
0151     /* RESET_B3_REQ */ [0x10] = "\x03\x2b\x01",
0152     /* ALERT_CONF */ [0x13] = "\x03\x23\x01",
0153     /* CONNECT_CONF */ [0x14] = "\x03\x23\x01",
0154     /* DISCONNECT_CONF */ [0x16] = "\x03\x23\x01",
0155     /* LISTEN_CONF */ [0x17] = "\x03\x23\x01",
0156     /* MANUFACTURER_REQ */ [0x18] = "\x03\x2a\x15\x21\x29\x01",
0157     /* INFO_CONF */ [0x1a] = "\x03\x23\x01",
0158     /* FACILITY_CONF */ [0x1b] = "\x03\x23\x1f\x1b\x01",
0159     /* SELECT_B_PROTOCOL_CONF */ [0x1c] = "\x03\x23\x01",
0160     /* CONNECT_B3_CONF */ [0x1d] = "\x03\x23\x01",
0161     /* DISCONNECT_B3_CONF */ [0x1f] = "\x03\x23\x01",
0162     /* DATA_B3_CONF */ [0x21] = "\x03\x19\x23\x01",
0163     /* RESET_B3_CONF */ [0x22] = "\x03\x23\x01",
0164     /* CONNECT_IND */ [0x26] = "\x03\x14\x0e\x10\x0f\x11\x0b\x28\x22\x04\x0c\x27\x2f\x1c\x01\x01",
0165     /* CONNECT_ACTIVE_IND */ [0x27] = "\x03\x16\x17\x28\x01",
0166     /* DISCONNECT_IND */ [0x28] = "\x03\x2c\x01",
0167     /* MANUFACTURER_CONF */ [0x2a] = "\x03\x2a\x15\x21\x29\x01",
0168     /* INFO_IND */ [0x2c] = "\x03\x26\x24\x01",
0169     /* FACILITY_IND */ [0x2d] = "\x03\x1f\x1d\x01",
0170     /* CONNECT_B3_IND */ [0x2f] = "\x03\x2b\x01",
0171     /* CONNECT_B3_ACTIVE_IND */ [0x30] = "\x03\x2b\x01",
0172     /* DISCONNECT_B3_IND */ [0x31] = "\x03\x2d\x2b\x01",
0173     /* DATA_B3_IND */ [0x33] = "\x03\x18\x1a\x19\x20\x01",
0174     /* RESET_B3_IND */ [0x34] = "\x03\x2b\x01",
0175     /* CONNECT_B3_T90_ACTIVE_IND */ [0x35] = "\x03\x2b\x01",
0176     /* CONNECT_RESP */ [0x38] = "\x03\x2e\x0d\x06\x08\x0a\x05\x07\x09\x01\x16\x17\x28\x04\x0c\x27\x2f\x1c\x01\x01",
0177     /* CONNECT_ACTIVE_RESP */ [0x39] = "\x03\x01",
0178     /* DISCONNECT_RESP */ [0x3a] = "\x03\x01",
0179     /* MANUFACTURER_IND */ [0x3c] = "\x03\x2a\x15\x21\x29\x01",
0180     /* INFO_RESP */ [0x3e] = "\x03\x01",
0181     /* FACILITY_RESP */ [0x3f] = "\x03\x1f\x01",
0182     /* CONNECT_B3_RESP */ [0x41] = "\x03\x2e\x2b\x01",
0183     /* CONNECT_B3_ACTIVE_RESP */ [0x42] = "\x03\x01",
0184     /* DISCONNECT_B3_RESP */ [0x43] = "\x03\x01",
0185     /* DATA_B3_RESP */ [0x45] = "\x03\x19\x01",
0186     /* RESET_B3_RESP */ [0x46] = "\x03\x01",
0187     /* CONNECT_B3_T90_ACTIVE_RESP */ [0x47] = "\x03\x01",
0188     /* MANUFACTURER_RESP */ [0x4e] = "\x03\x2a\x15\x21\x29\x01",
0189 };
0190 
0191 /*-------------------------------------------------------*/
0192 
0193 #define byteTLcpy(x, y)         *(u8 *)(x) = *(u8 *)(y);
0194 #define wordTLcpy(x, y)         *(u16 *)(x) = *(u16 *)(y);
0195 #define dwordTLcpy(x, y)        memcpy(x, y, 4);
0196 #define structTLcpy(x, y, l)    memcpy(x, y, l)
0197 #define structTLcpyovl(x, y, l) memmove(x, y, l)
0198 
0199 #define byteTRcpy(x, y)         *(u8 *)(y) = *(u8 *)(x);
0200 #define wordTRcpy(x, y)         *(u16 *)(y) = *(u16 *)(x);
0201 #define dwordTRcpy(x, y)        memcpy(y, x, 4);
0202 #define structTRcpy(x, y, l)    memcpy(y, x, l)
0203 #define structTRcpyovl(x, y, l) memmove(y, x, l)
0204 
0205 /*-------------------------------------------------------*/
0206 static unsigned command_2_index(u8 c, u8 sc)
0207 {
0208     if (c & 0x80)
0209         c = 0x9 + (c & 0x0f);
0210     else if (c == 0x41)
0211         c = 0x9 + 0x1;
0212     if (c > 0x18)
0213         c = 0x00;
0214     return (sc & 3) * (0x9 + 0x9) + c;
0215 }
0216 
0217 /**
0218  * capi_cmd2par() - find parameter string for CAPI 2.0 command/subcommand
0219  * @cmd:    command number
0220  * @subcmd: subcommand number
0221  *
0222  * Return value: static string, NULL if command/subcommand unknown
0223  */
0224 
0225 static unsigned char *capi_cmd2par(u8 cmd, u8 subcmd)
0226 {
0227     return cpars[command_2_index(cmd, subcmd)];
0228 }
0229 
0230 /*-------------------------------------------------------*/
0231 #define TYP (cdef[cmsg->par[cmsg->p]].typ)
0232 #define OFF (((u8 *)cmsg) + cdef[cmsg->par[cmsg->p]].off)
0233 
0234 static void jumpcstruct(_cmsg *cmsg)
0235 {
0236     unsigned layer;
0237     for (cmsg->p++, layer = 1; layer;) {
0238         /* $$$$$ assert (cmsg->p); */
0239         cmsg->p++;
0240         switch (TYP) {
0241         case _CMSTRUCT:
0242             layer++;
0243             break;
0244         case _CEND:
0245             layer--;
0246             break;
0247         }
0248     }
0249 }
0250 
0251 /*-------------------------------------------------------*/
0252 
0253 static char *mnames[] =
0254 {
0255     [0x01] = "ALERT_REQ",
0256     [0x02] = "CONNECT_REQ",
0257     [0x04] = "DISCONNECT_REQ",
0258     [0x05] = "LISTEN_REQ",
0259     [0x08] = "INFO_REQ",
0260     [0x09] = "FACILITY_REQ",
0261     [0x0a] = "SELECT_B_PROTOCOL_REQ",
0262     [0x0b] = "CONNECT_B3_REQ",
0263     [0x0d] = "DISCONNECT_B3_REQ",
0264     [0x0f] = "DATA_B3_REQ",
0265     [0x10] = "RESET_B3_REQ",
0266     [0x13] = "ALERT_CONF",
0267     [0x14] = "CONNECT_CONF",
0268     [0x16] = "DISCONNECT_CONF",
0269     [0x17] = "LISTEN_CONF",
0270     [0x18] = "MANUFACTURER_REQ",
0271     [0x1a] = "INFO_CONF",
0272     [0x1b] = "FACILITY_CONF",
0273     [0x1c] = "SELECT_B_PROTOCOL_CONF",
0274     [0x1d] = "CONNECT_B3_CONF",
0275     [0x1f] = "DISCONNECT_B3_CONF",
0276     [0x21] = "DATA_B3_CONF",
0277     [0x22] = "RESET_B3_CONF",
0278     [0x26] = "CONNECT_IND",
0279     [0x27] = "CONNECT_ACTIVE_IND",
0280     [0x28] = "DISCONNECT_IND",
0281     [0x2a] = "MANUFACTURER_CONF",
0282     [0x2c] = "INFO_IND",
0283     [0x2d] = "FACILITY_IND",
0284     [0x2f] = "CONNECT_B3_IND",
0285     [0x30] = "CONNECT_B3_ACTIVE_IND",
0286     [0x31] = "DISCONNECT_B3_IND",
0287     [0x33] = "DATA_B3_IND",
0288     [0x34] = "RESET_B3_IND",
0289     [0x35] = "CONNECT_B3_T90_ACTIVE_IND",
0290     [0x38] = "CONNECT_RESP",
0291     [0x39] = "CONNECT_ACTIVE_RESP",
0292     [0x3a] = "DISCONNECT_RESP",
0293     [0x3c] = "MANUFACTURER_IND",
0294     [0x3e] = "INFO_RESP",
0295     [0x3f] = "FACILITY_RESP",
0296     [0x41] = "CONNECT_B3_RESP",
0297     [0x42] = "CONNECT_B3_ACTIVE_RESP",
0298     [0x43] = "DISCONNECT_B3_RESP",
0299     [0x45] = "DATA_B3_RESP",
0300     [0x46] = "RESET_B3_RESP",
0301     [0x47] = "CONNECT_B3_T90_ACTIVE_RESP",
0302     [0x4e] = "MANUFACTURER_RESP"
0303 };
0304 
0305 /**
0306  * capi_cmd2str() - convert CAPI 2.0 command/subcommand number to name
0307  * @cmd:    command number
0308  * @subcmd: subcommand number
0309  *
0310  * Return value: static string
0311  */
0312 
0313 char *capi_cmd2str(u8 cmd, u8 subcmd)
0314 {
0315     char *result;
0316 
0317     result = mnames[command_2_index(cmd, subcmd)];
0318     if (result == NULL)
0319         result = "INVALID_COMMAND";
0320     return result;
0321 }
0322 
0323 
0324 /*-------------------------------------------------------*/
0325 
0326 #ifdef CONFIG_CAPI_TRACE
0327 
0328 /*-------------------------------------------------------*/
0329 
0330 static char *pnames[] =
0331 {
0332     /*00 */ NULL,
0333     /*01 */ NULL,
0334     /*02 */ NULL,
0335     /*03 */ "Controller/PLCI/NCCI",
0336     /*04 */ "AdditionalInfo",
0337     /*05 */ "B1configuration",
0338     /*06 */ "B1protocol",
0339     /*07 */ "B2configuration",
0340     /*08 */ "B2protocol",
0341     /*09 */ "B3configuration",
0342     /*0a */ "B3protocol",
0343     /*0b */ "BC",
0344     /*0c */ "BChannelinformation",
0345     /*0d */ "BProtocol",
0346     /*0e */ "CalledPartyNumber",
0347     /*0f */ "CalledPartySubaddress",
0348     /*10 */ "CallingPartyNumber",
0349     /*11 */ "CallingPartySubaddress",
0350     /*12 */ "CIPmask",
0351     /*13 */ "CIPmask2",
0352     /*14 */ "CIPValue",
0353     /*15 */ "Class",
0354     /*16 */ "ConnectedNumber",
0355     /*17 */ "ConnectedSubaddress",
0356     /*18 */ "Data32",
0357     /*19 */ "DataHandle",
0358     /*1a */ "DataLength",
0359     /*1b */ "FacilityConfirmationParameter",
0360     /*1c */ "Facilitydataarray",
0361     /*1d */ "FacilityIndicationParameter",
0362     /*1e */ "FacilityRequestParameter",
0363     /*1f */ "FacilitySelector",
0364     /*20 */ "Flags",
0365     /*21 */ "Function",
0366     /*22 */ "HLC",
0367     /*23 */ "Info",
0368     /*24 */ "InfoElement",
0369     /*25 */ "InfoMask",
0370     /*26 */ "InfoNumber",
0371     /*27 */ "Keypadfacility",
0372     /*28 */ "LLC",
0373     /*29 */ "ManuData",
0374     /*2a */ "ManuID",
0375     /*2b */ "NCPI",
0376     /*2c */ "Reason",
0377     /*2d */ "Reason_B3",
0378     /*2e */ "Reject",
0379     /*2f */ "Useruserdata"
0380 };
0381 
0382 #include <linux/stdarg.h>
0383 
0384 /*-------------------------------------------------------*/
0385 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt, ...)
0386 {
0387     va_list f;
0388     size_t n, r;
0389 
0390     if (!cdb)
0391         return NULL;
0392     va_start(f, fmt);
0393     r = cdb->size - cdb->pos;
0394     n = vsnprintf(cdb->p, r, fmt, f);
0395     va_end(f);
0396     if (n >= r) {
0397         /* truncated, need bigger buffer */
0398         size_t ns = 2 * cdb->size;
0399         u_char *nb;
0400 
0401         while ((ns - cdb->pos) <= n)
0402             ns *= 2;
0403         nb = kmalloc(ns, GFP_ATOMIC);
0404         if (!nb) {
0405             cdebbuf_free(cdb);
0406             return NULL;
0407         }
0408         memcpy(nb, cdb->buf, cdb->pos);
0409         kfree(cdb->buf);
0410         nb[cdb->pos] = 0;
0411         cdb->buf = nb;
0412         cdb->p = cdb->buf + cdb->pos;
0413         cdb->size = ns;
0414         va_start(f, fmt);
0415         r = cdb->size - cdb->pos;
0416         n = vsnprintf(cdb->p, r, fmt, f);
0417         va_end(f);
0418     }
0419     cdb->p += n;
0420     cdb->pos += n;
0421     return cdb;
0422 }
0423 
0424 static _cdebbuf *printstructlen(_cdebbuf *cdb, u8 *m, unsigned len)
0425 {
0426     unsigned hex = 0;
0427 
0428     if (!cdb)
0429         return NULL;
0430     for (; len; len--, m++)
0431         if (isalnum(*m) || *m == ' ') {
0432             if (hex)
0433                 cdb = bufprint(cdb, ">");
0434             cdb = bufprint(cdb, "%c", *m);
0435             hex = 0;
0436         } else {
0437             if (!hex)
0438                 cdb = bufprint(cdb, "<%02x", *m);
0439             else
0440                 cdb = bufprint(cdb, " %02x", *m);
0441             hex = 1;
0442         }
0443     if (hex)
0444         cdb = bufprint(cdb, ">");
0445     return cdb;
0446 }
0447 
0448 static _cdebbuf *printstruct(_cdebbuf *cdb, u8 *m)
0449 {
0450     unsigned len;
0451 
0452     if (m[0] != 0xff) {
0453         len = m[0];
0454         m += 1;
0455     } else {
0456         len = ((u16 *) (m + 1))[0];
0457         m += 3;
0458     }
0459     cdb = printstructlen(cdb, m, len);
0460     return cdb;
0461 }
0462 
0463 /*-------------------------------------------------------*/
0464 #define NAME (pnames[cmsg->par[cmsg->p]])
0465 
0466 static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level)
0467 {
0468     if (!cmsg->par)
0469         return NULL;    /* invalid command/subcommand */
0470 
0471     for (; TYP != _CEND; cmsg->p++) {
0472         int slen = 29 + 3 - level;
0473         int i;
0474 
0475         if (!cdb)
0476             return NULL;
0477         cdb = bufprint(cdb, "  ");
0478         for (i = 0; i < level - 1; i++)
0479             cdb = bufprint(cdb, " ");
0480 
0481         switch (TYP) {
0482         case _CBYTE:
0483             cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u8 *) (cmsg->m + cmsg->l));
0484             cmsg->l++;
0485             break;
0486         case _CWORD:
0487             cdb = bufprint(cdb, "%-*s = 0x%x\n", slen, NAME, *(u16 *) (cmsg->m + cmsg->l));
0488             cmsg->l += 2;
0489             break;
0490         case _CDWORD:
0491             cdb = bufprint(cdb, "%-*s = 0x%lx\n", slen, NAME, *(u32 *) (cmsg->m + cmsg->l));
0492             cmsg->l += 4;
0493             break;
0494         case _CSTRUCT:
0495             cdb = bufprint(cdb, "%-*s = ", slen, NAME);
0496             if (cmsg->m[cmsg->l] == '\0')
0497                 cdb = bufprint(cdb, "default");
0498             else
0499                 cdb = printstruct(cdb, cmsg->m + cmsg->l);
0500             cdb = bufprint(cdb, "\n");
0501             if (cmsg->m[cmsg->l] != 0xff)
0502                 cmsg->l += 1 + cmsg->m[cmsg->l];
0503             else
0504                 cmsg->l += 3 + *(u16 *) (cmsg->m + cmsg->l + 1);
0505 
0506             break;
0507 
0508         case _CMSTRUCT:
0509 /*----- Metastruktur 0 -----*/
0510             if (cmsg->m[cmsg->l] == '\0') {
0511                 cdb = bufprint(cdb, "%-*s = default\n", slen, NAME);
0512                 cmsg->l++;
0513                 jumpcstruct(cmsg);
0514             } else {
0515                 char *name = NAME;
0516                 unsigned _l = cmsg->l;
0517                 cdb = bufprint(cdb, "%-*s\n", slen, name);
0518                 cmsg->l = (cmsg->m + _l)[0] == 255 ? cmsg->l + 3 : cmsg->l + 1;
0519                 cmsg->p++;
0520                 cdb = protocol_message_2_pars(cdb, cmsg, level + 1);
0521             }
0522             break;
0523         }
0524     }
0525     return cdb;
0526 }
0527 /*-------------------------------------------------------*/
0528 
0529 static _cdebbuf *g_debbuf;
0530 static u_long g_debbuf_lock;
0531 static _cmsg *g_cmsg;
0532 
0533 static _cdebbuf *cdebbuf_alloc(void)
0534 {
0535     _cdebbuf *cdb;
0536 
0537     if (likely(!test_and_set_bit(1, &g_debbuf_lock))) {
0538         cdb = g_debbuf;
0539         goto init;
0540     } else
0541         cdb = kmalloc(sizeof(_cdebbuf), GFP_ATOMIC);
0542     if (!cdb)
0543         return NULL;
0544     cdb->buf = kmalloc(CDEBUG_SIZE, GFP_ATOMIC);
0545     if (!cdb->buf) {
0546         kfree(cdb);
0547         return NULL;
0548     }
0549     cdb->size = CDEBUG_SIZE;
0550 init:
0551     cdb->buf[0] = 0;
0552     cdb->p = cdb->buf;
0553     cdb->pos = 0;
0554     return cdb;
0555 }
0556 
0557 /**
0558  * cdebbuf_free() - free CAPI debug buffer
0559  * @cdb:    buffer to free
0560  */
0561 
0562 void cdebbuf_free(_cdebbuf *cdb)
0563 {
0564     if (likely(cdb == g_debbuf)) {
0565         test_and_clear_bit(1, &g_debbuf_lock);
0566         return;
0567     }
0568     if (likely(cdb))
0569         kfree(cdb->buf);
0570     kfree(cdb);
0571 }
0572 
0573 
0574 /**
0575  * capi_message2str() - format CAPI 2.0 message for printing
0576  * @msg:    CAPI 2.0 message
0577  *
0578  * Allocates a CAPI debug buffer and fills it with a printable representation
0579  * of the CAPI 2.0 message in @msg.
0580  * Return value: allocated debug buffer, NULL on error
0581  * The returned buffer should be freed by a call to cdebbuf_free() after use.
0582  */
0583 
0584 _cdebbuf *capi_message2str(u8 *msg)
0585 {
0586     _cdebbuf *cdb;
0587     _cmsg   *cmsg;
0588 
0589     cdb = cdebbuf_alloc();
0590     if (unlikely(!cdb))
0591         return NULL;
0592     if (likely(cdb == g_debbuf))
0593         cmsg = g_cmsg;
0594     else
0595         cmsg = kmalloc(sizeof(_cmsg), GFP_ATOMIC);
0596     if (unlikely(!cmsg)) {
0597         cdebbuf_free(cdb);
0598         return NULL;
0599     }
0600     cmsg->m = msg;
0601     cmsg->l = 8;
0602     cmsg->p = 0;
0603     byteTRcpy(cmsg->m + 4, &cmsg->Command);
0604     byteTRcpy(cmsg->m + 5, &cmsg->Subcommand);
0605     cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand);
0606 
0607     cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n",
0608                capi_cmd2str(cmsg->Command, cmsg->Subcommand),
0609                ((unsigned short *) msg)[1],
0610                ((unsigned short *) msg)[3],
0611                ((unsigned short *) msg)[0]);
0612 
0613     cdb = protocol_message_2_pars(cdb, cmsg, 1);
0614     if (unlikely(cmsg != g_cmsg))
0615         kfree(cmsg);
0616     return cdb;
0617 }
0618 
0619 int __init cdebug_init(void)
0620 {
0621     g_cmsg = kmalloc(sizeof(_cmsg), GFP_KERNEL);
0622     if (!g_cmsg)
0623         return -ENOMEM;
0624     g_debbuf = kmalloc(sizeof(_cdebbuf), GFP_KERNEL);
0625     if (!g_debbuf) {
0626         kfree(g_cmsg);
0627         return -ENOMEM;
0628     }
0629     g_debbuf->buf = kmalloc(CDEBUG_GSIZE, GFP_KERNEL);
0630     if (!g_debbuf->buf) {
0631         kfree(g_cmsg);
0632         kfree(g_debbuf);
0633         return -ENOMEM;
0634     }
0635     g_debbuf->size = CDEBUG_GSIZE;
0636     g_debbuf->buf[0] = 0;
0637     g_debbuf->p = g_debbuf->buf;
0638     g_debbuf->pos = 0;
0639     return 0;
0640 }
0641 
0642 void cdebug_exit(void)
0643 {
0644     if (g_debbuf)
0645         kfree(g_debbuf->buf);
0646     kfree(g_debbuf);
0647     kfree(g_cmsg);
0648 }
0649 
0650 #else /* !CONFIG_CAPI_TRACE */
0651 
0652 static _cdebbuf g_debbuf = {"CONFIG_CAPI_TRACE not enabled", NULL, 0, 0};
0653 
0654 _cdebbuf *capi_message2str(u8 *msg)
0655 {
0656     return &g_debbuf;
0657 }
0658 
0659 _cdebbuf *capi_cmsg2str(_cmsg *cmsg)
0660 {
0661     return &g_debbuf;
0662 }
0663 
0664 void cdebbuf_free(_cdebbuf *cdb)
0665 {
0666 }
0667 
0668 int __init cdebug_init(void)
0669 {
0670     return 0;
0671 }
0672 
0673 void cdebug_exit(void)
0674 {
0675 }
0676 
0677 #endif
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