Sat Apr 12 07:12:24 2008

Asterisk developer's documentation


func_odbc.c

Go to the documentation of this file.
00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (c) 2005, 2006 Tilghman Lesher
00005  *
00006  * Tilghman Lesher <func_odbc__200508@the-tilghman.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*!
00020  * \file
00021  *
00022  * \brief ODBC lookups
00023  *
00024  * \author Tilghman Lesher <func_odbc__200508@the-tilghman.com>
00025  */
00026 
00027 /*** MODULEINFO
00028    <depend>unixodbc</depend>
00029    <depend>ltdl</depend>
00030    <depend>res_odbc</depend>
00031  ***/
00032 
00033 #include "asterisk.h"
00034 
00035 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 87262 $")
00036 
00037 #include <sys/types.h>
00038 #include <stdio.h>
00039 #include <stdlib.h>
00040 #include <unistd.h>
00041 #include <string.h>
00042 
00043 #include "asterisk/module.h"
00044 #include "asterisk/file.h"
00045 #include "asterisk/logger.h"
00046 #include "asterisk/options.h"
00047 #include "asterisk/channel.h"
00048 #include "asterisk/pbx.h"
00049 #include "asterisk/module.h"
00050 #include "asterisk/config.h"
00051 #include "asterisk/res_odbc.h"
00052 #include "asterisk/app.h"
00053 
00054 static char *config = "func_odbc.conf";
00055 
00056 enum {
00057    OPT_ESCAPECOMMAS =   (1 << 0),
00058 } odbc_option_flags;
00059 
00060 struct acf_odbc_query {
00061    AST_LIST_ENTRY(acf_odbc_query) list;
00062    char dsn[30];
00063    char sql_read[2048];
00064    char sql_write[2048];
00065    unsigned int flags;
00066    struct ast_custom_function *acf;
00067 };
00068 
00069 AST_LIST_HEAD_STATIC(queries, acf_odbc_query);
00070 
00071 static SQLHSTMT generic_prepare(struct odbc_obj *obj, void *data)
00072 {
00073    int res;
00074    char *sql = data;
00075    SQLHSTMT stmt;
00076 
00077    res = SQLAllocHandle (SQL_HANDLE_STMT, obj->con, &stmt);
00078    if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
00079       ast_log(LOG_WARNING, "SQL Alloc Handle failed!\n");
00080       return NULL;
00081    }
00082 
00083    res = SQLPrepare(stmt, (unsigned char *)sql, SQL_NTS);
00084    if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
00085       ast_log(LOG_WARNING, "SQL Prepare failed![%s]\n", sql);
00086       SQLCloseCursor(stmt);
00087       SQLFreeHandle (SQL_HANDLE_STMT, stmt);
00088       return NULL;
00089    }
00090 
00091    return stmt;
00092 }
00093 
00094 /*
00095  * Master control routine
00096  */
00097 static int acf_odbc_write(struct ast_channel *chan, char *cmd, char *s, const char *value)
00098 {
00099    struct odbc_obj *obj;
00100    struct acf_odbc_query *query;
00101    char *t, buf[2048]="", varname[15];
00102    int i, bogus_chan = 0;
00103    AST_DECLARE_APP_ARGS(values,
00104       AST_APP_ARG(field)[100];
00105    );
00106    AST_DECLARE_APP_ARGS(args,
00107       AST_APP_ARG(field)[100];
00108    );
00109    SQLHSTMT stmt;
00110    SQLLEN rows=0;
00111 
00112    AST_LIST_LOCK(&queries);
00113    AST_LIST_TRAVERSE(&queries, query, list) {
00114       if (!strcmp(query->acf->name, cmd)) {
00115          break;
00116       }
00117    }
00118 
00119    if (!query) {
00120       ast_log(LOG_ERROR, "No such function '%s'\n", cmd);
00121       AST_LIST_UNLOCK(&queries);
00122       return -1;
00123    }
00124 
00125    obj = ast_odbc_request_obj(query->dsn, 0);
00126 
00127    if (!obj) {
00128       ast_log(LOG_ERROR, "No database handle available with the name of '%s' (check res_odbc.conf)\n", query->dsn);
00129       AST_LIST_UNLOCK(&queries);
00130       return -1;
00131    }
00132 
00133    if (!chan) {
00134       if ((chan = ast_channel_alloc(0, 0, "", "", "", "", "", 0, "Bogus/func_odbc")))
00135          bogus_chan = 1;
00136    }
00137 
00138    if (chan)
00139       ast_autoservice_start(chan);
00140 
00141    /* Parse our arguments */
00142    t = value ? ast_strdupa(value) : "";
00143 
00144    if (!s || !t) {
00145       ast_log(LOG_ERROR, "Out of memory\n");
00146       AST_LIST_UNLOCK(&queries);
00147       if (chan)
00148          ast_autoservice_stop(chan);
00149       if (bogus_chan)
00150          ast_channel_free(chan);
00151       return -1;
00152    }
00153 
00154    AST_STANDARD_APP_ARGS(args, s);
00155    for (i = 0; i < args.argc; i++) {
00156       snprintf(varname, sizeof(varname), "ARG%d", i + 1);
00157       pbx_builtin_pushvar_helper(chan, varname, args.field[i]);
00158    }
00159 
00160    /* Parse values, just like arguments */
00161    /* Can't use the pipe, because app Set removes them */
00162    AST_NONSTANDARD_APP_ARGS(values, t, ',');
00163    for (i = 0; i < values.argc; i++) {
00164       snprintf(varname, sizeof(varname), "VAL%d", i + 1);
00165       pbx_builtin_pushvar_helper(chan, varname, values.field[i]);
00166    }
00167 
00168    /* Additionally set the value as a whole (but push an empty string if value is NULL) */
00169    pbx_builtin_pushvar_helper(chan, "VALUE", value ? value : "");
00170 
00171    pbx_substitute_variables_helper(chan, query->sql_write, buf, sizeof(buf) - 1);
00172 
00173    /* Restore prior values */
00174    for (i = 0; i < args.argc; i++) {
00175       snprintf(varname, sizeof(varname), "ARG%d", i + 1);
00176       pbx_builtin_setvar_helper(chan, varname, NULL);
00177    }
00178 
00179    for (i = 0; i < values.argc; i++) {
00180       snprintf(varname, sizeof(varname), "VAL%d", i + 1);
00181       pbx_builtin_setvar_helper(chan, varname, NULL);
00182    }
00183    pbx_builtin_setvar_helper(chan, "VALUE", NULL);
00184 
00185    AST_LIST_UNLOCK(&queries);
00186 
00187    stmt = ast_odbc_prepare_and_execute(obj, generic_prepare, buf);
00188 
00189    if (stmt) {
00190       /* Rows affected */
00191       SQLRowCount(stmt, &rows);
00192    }
00193 
00194    /* Output the affected rows, for all cases.  In the event of failure, we
00195     * flag this as -1 rows.  Note that this is different from 0 affected rows
00196     * which would be the case if we succeeded in our query, but the values did
00197     * not change. */
00198    snprintf(varname, sizeof(varname), "%d", (int)rows);
00199    pbx_builtin_setvar_helper(chan, "ODBCROWS", varname);
00200 
00201    if (stmt) {
00202       SQLCloseCursor(stmt);
00203       SQLFreeHandle(SQL_HANDLE_STMT, stmt);
00204    }
00205    if (obj)
00206       ast_odbc_release_obj(obj);
00207 
00208    if (chan)
00209       ast_autoservice_stop(chan);
00210    if (bogus_chan)
00211       ast_channel_free(chan);
00212 
00213    return 0;
00214 }
00215 
00216 static int acf_odbc_read(struct ast_channel *chan, char *cmd, char *s, char *buf, size_t len)
00217 {
00218    struct odbc_obj *obj;
00219    struct acf_odbc_query *query;
00220    char sql[2048] = "", varname[15];
00221    int res, x, buflen = 0, escapecommas, bogus_chan = 0;
00222    AST_DECLARE_APP_ARGS(args,
00223       AST_APP_ARG(field)[100];
00224    );
00225    SQLHSTMT stmt;
00226    SQLSMALLINT colcount=0;
00227    SQLLEN indicator;
00228 
00229    AST_LIST_LOCK(&queries);
00230    AST_LIST_TRAVERSE(&queries, query, list) {
00231       if (!strcmp(query->acf->name, cmd)) {
00232          break;
00233       }
00234    }
00235 
00236    if (!query) {
00237       ast_log(LOG_ERROR, "No such function '%s'\n", cmd);
00238       AST_LIST_UNLOCK(&queries);
00239       return -1;
00240    }
00241 
00242    obj = ast_odbc_request_obj(query->dsn, 0);
00243 
00244    if (!obj) {
00245       ast_log(LOG_ERROR, "No such DSN registered (or out of connections): %s (check res_odbc.conf)\n", query->dsn);
00246       AST_LIST_UNLOCK(&queries);
00247       return -1;
00248    }
00249 
00250    if (!chan) {
00251       if ((chan = ast_channel_alloc(0, 0, "", "", "", "", "", 0, "Bogus/func_odbc")))
00252          bogus_chan = 1;
00253    }
00254 
00255    if (chan)
00256       ast_autoservice_start(chan);
00257 
00258    AST_STANDARD_APP_ARGS(args, s);
00259    for (x = 0; x < args.argc; x++) {
00260       snprintf(varname, sizeof(varname), "ARG%d", x + 1);
00261       pbx_builtin_pushvar_helper(chan, varname, args.field[x]);
00262    }
00263 
00264    pbx_substitute_variables_helper(chan, query->sql_read, sql, sizeof(sql) - 1);
00265 
00266    /* Restore prior values */
00267    for (x = 0; x < args.argc; x++) {
00268       snprintf(varname, sizeof(varname), "ARG%d", x + 1);
00269       pbx_builtin_setvar_helper(chan, varname, NULL);
00270    }
00271 
00272    /* Save this flag, so we can release the lock */
00273    escapecommas = ast_test_flag(query, OPT_ESCAPECOMMAS);
00274 
00275    AST_LIST_UNLOCK(&queries);
00276 
00277    stmt = ast_odbc_prepare_and_execute(obj, generic_prepare, sql);
00278 
00279    if (!stmt) {
00280       ast_odbc_release_obj(obj);
00281       if (chan)
00282          ast_autoservice_stop(chan);
00283       if (bogus_chan)
00284          ast_channel_free(chan);
00285       return -1;
00286    }
00287 
00288    res = SQLNumResultCols(stmt, &colcount);
00289    if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
00290       ast_log(LOG_WARNING, "SQL Column Count error!\n[%s]\n\n", sql);
00291       SQLCloseCursor(stmt);
00292       SQLFreeHandle (SQL_HANDLE_STMT, stmt);
00293       ast_odbc_release_obj(obj);
00294       if (chan)
00295          ast_autoservice_stop(chan);
00296       if (bogus_chan)
00297          ast_channel_free(chan);
00298       return -1;
00299    }
00300 
00301    *buf = '\0';
00302 
00303    res = SQLFetch(stmt);
00304    if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
00305       int res1 = -1;
00306       if (res == SQL_NO_DATA) {
00307          if (option_verbose > 3) {
00308             ast_verbose(VERBOSE_PREFIX_4 "Found no rows [%s]\n", sql);
00309          }
00310          res1 = 0;
00311       } else if (option_verbose > 3) {
00312          ast_log(LOG_WARNING, "Error %d in FETCH [%s]\n", res, sql);
00313       }
00314       SQLCloseCursor(stmt);
00315       SQLFreeHandle(SQL_HANDLE_STMT, stmt);
00316       ast_odbc_release_obj(obj);
00317       if (chan)
00318          ast_autoservice_stop(chan);
00319       if (bogus_chan)
00320          ast_channel_free(chan);
00321       return res1;
00322    }
00323 
00324    for (x = 0; x < colcount; x++) {
00325       int i;
00326       char coldata[256];
00327 
00328       buflen = strlen(buf);
00329       res = SQLGetData(stmt, x + 1, SQL_CHAR, coldata, sizeof(coldata), &indicator);
00330       if (indicator == SQL_NULL_DATA) {
00331          coldata[0] = '\0';
00332          res = SQL_SUCCESS;
00333       }
00334 
00335       if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
00336          ast_log(LOG_WARNING, "SQL Get Data error!\n[%s]\n\n", sql);
00337          SQLCloseCursor(stmt);
00338          SQLFreeHandle(SQL_HANDLE_STMT, stmt);
00339          ast_odbc_release_obj(obj);
00340          if (chan)
00341             ast_autoservice_stop(chan);
00342          if (bogus_chan)
00343             ast_channel_free(chan);
00344          return -1;
00345       }
00346 
00347       /* Copy data, encoding '\' and ',' for the argument parser */
00348       for (i = 0; i < sizeof(coldata); i++) {
00349          if (escapecommas && (coldata[i] == '\\' || coldata[i] == ',')) {
00350             buf[buflen++] = '\\';
00351          }
00352          buf[buflen++] = coldata[i];
00353 
00354          if (buflen >= len - 2)
00355             break;
00356 
00357          if (coldata[i] == '\0')
00358             break;
00359       }
00360 
00361       buf[buflen - 1] = ',';
00362       buf[buflen] = '\0';
00363    }
00364    /* Trim trailing comma */
00365    buf[buflen - 1] = '\0';
00366 
00367    SQLCloseCursor(stmt);
00368    SQLFreeHandle(SQL_HANDLE_STMT, stmt);
00369    ast_odbc_release_obj(obj);
00370    if (chan)
00371       ast_autoservice_stop(chan);
00372    if (bogus_chan)
00373       ast_channel_free(chan);
00374    return 0;
00375 }
00376 
00377 static int acf_escape(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
00378 {
00379    char *out = buf;
00380 
00381    for (; *data && out - buf < len; data++) {
00382       if (*data == '\'') {
00383          *out = '\'';
00384          out++;
00385       }
00386       *out++ = *data;
00387    }
00388    *out = '\0';
00389 
00390    return 0;
00391 }
00392 
00393 static struct ast_custom_function escape_function = {
00394    .name = "SQL_ESC",
00395    .synopsis = "Escapes single ticks for use in SQL statements",
00396    .syntax = "SQL_ESC(<string>)",
00397    .desc =
00398 "Used in SQL templates to escape data which may contain single ticks (') which\n"
00399 "are otherwise used to delimit data.  For example:\n"
00400 "SELECT foo FROM bar WHERE baz='${SQL_ESC(${ARG1})}'\n",
00401    .read = acf_escape,
00402    .write = NULL,
00403 };
00404 
00405 static int init_acf_query(struct ast_config *cfg, char *catg, struct acf_odbc_query **query)
00406 {
00407    const char *tmp;
00408 
00409    if (!cfg || !catg) {
00410       return -1;
00411    }
00412 
00413    *query = ast_calloc(1, sizeof(struct acf_odbc_query));
00414    if (! (*query))
00415       return -1;
00416 
00417    if ((tmp = ast_variable_retrieve(cfg, catg, "dsn"))) {
00418       ast_copy_string((*query)->dsn, tmp, sizeof((*query)->dsn));
00419    } else {
00420       free(*query);
00421       *query = NULL;
00422       return -1;
00423    }
00424 
00425    if ((tmp = ast_variable_retrieve(cfg, catg, "read"))) {
00426       ast_copy_string((*query)->sql_read, tmp, sizeof((*query)->sql_read));
00427    }
00428 
00429    if ((tmp = ast_variable_retrieve(cfg, catg, "write"))) {
00430       ast_copy_string((*query)->sql_write, tmp, sizeof((*query)->sql_write));
00431    }
00432 
00433    /* Allow escaping of embedded commas in fields to be turned off */
00434    ast_set_flag((*query), OPT_ESCAPECOMMAS);
00435    if ((tmp = ast_variable_retrieve(cfg, catg, "escapecommas"))) {
00436       if (ast_false(tmp))
00437          ast_clear_flag((*query), OPT_ESCAPECOMMAS);
00438    }
00439 
00440    (*query)->acf = ast_calloc(1, sizeof(struct ast_custom_function));
00441    if (! (*query)->acf) {
00442       free(*query);
00443       *query = NULL;
00444       return -1;
00445    }
00446 
00447    if ((tmp = ast_variable_retrieve(cfg, catg, "prefix")) && !ast_strlen_zero(tmp)) {
00448       asprintf((char **)&((*query)->acf->name), "%s_%s", tmp, catg);
00449    } else {
00450       asprintf((char **)&((*query)->acf->name), "ODBC_%s", catg);
00451    }
00452 
00453    if (!((*query)->acf->name)) {
00454       free((*query)->acf);
00455       free(*query);
00456       *query = NULL;
00457       return -1;
00458    }
00459 
00460    asprintf((char **)&((*query)->acf->syntax), "%s(<arg1>[...[,<argN>]])", (*query)->acf->name);
00461 
00462    if (!((*query)->acf->syntax)) {
00463       free((char *)(*query)->acf->name);
00464       free((*query)->acf);
00465       free(*query);
00466       *query = NULL;
00467       return -1;
00468    }
00469 
00470    (*query)->acf->synopsis = "Runs the referenced query with the specified arguments";
00471    if (!ast_strlen_zero((*query)->sql_read) && !ast_strlen_zero((*query)->sql_write)) {
00472       asprintf((char **)&((*query)->acf->desc),
00473                "Runs the following query, as defined in func_odbc.conf, performing\n"
00474                   "substitution of the arguments into the query as specified by ${ARG1},\n"
00475                "${ARG2}, ... ${ARGn}.  When setting the function, the values are provided\n"
00476                "either in whole as ${VALUE} or parsed as ${VAL1}, ${VAL2}, ... ${VALn}.\n"
00477                "\nRead:\n%s\n\nWrite:\n%s\n",
00478                (*query)->sql_read,
00479                (*query)->sql_write);
00480    } else if (!ast_strlen_zero((*query)->sql_read)) {
00481       asprintf((char **)&((*query)->acf->desc),
00482                "Runs the following query, as defined in func_odbc.conf, performing\n"
00483                   "substitution of the arguments into the query as specified by ${ARG1},\n"
00484                "${ARG2}, ... ${ARGn}.  This function may only be read, not set.\n\nSQL:\n%s\n",
00485                (*query)->sql_read);
00486    } else if (!ast_strlen_zero((*query)->sql_write)) {
00487       asprintf((char **)&((*query)->acf->desc),
00488                "Runs the following query, as defined in func_odbc.conf, performing\n"
00489                   "substitution of the arguments into the query as specified by ${ARG1},\n"
00490                "${ARG2}, ... ${ARGn}.  The values are provided either in whole as\n"
00491                "${VALUE} or parsed as ${VAL1}, ${VAL2}, ... ${VALn}.\n"
00492                "This function may only be set.\nSQL:\n%s\n",
00493                (*query)->sql_write);
00494    }
00495 
00496    /* Could be out of memory, or could be we have neither sql_read nor sql_write */
00497    if (! ((*query)->acf->desc)) {
00498       free((char *)(*query)->acf->syntax);
00499       free((char *)(*query)->acf->name);
00500       free((*query)->acf);
00501       free(*query);
00502       *query = NULL;
00503       return -1;
00504    }
00505 
00506    if (ast_strlen_zero((*query)->sql_read)) {
00507       (*query)->acf->read = NULL;
00508    } else {
00509       (*query)->acf->read = acf_odbc_read;
00510    }
00511 
00512    if (ast_strlen_zero((*query)->sql_write)) {
00513       (*query)->acf->write = NULL;
00514    } else {
00515       (*query)->acf->write = acf_odbc_write;
00516    }
00517 
00518    return 0;
00519 }
00520 
00521 static int free_acf_query(struct acf_odbc_query *query)
00522 {
00523    if (query) {
00524       if (query->acf) {
00525          if (query->acf->name)
00526             free((char *)query->acf->name);
00527          if (query->acf->syntax)
00528             free((char *)query->acf->syntax);
00529          if (query->acf->desc)
00530             free((char *)query->acf->desc);
00531          free(query->acf);
00532       }
00533       free(query);
00534    }
00535    return 0;
00536 }
00537 
00538 static int odbc_load_module(void)
00539 {
00540    int res = 0;
00541    struct ast_config *cfg;
00542    char *catg;
00543 
00544    AST_LIST_LOCK(&queries);
00545 
00546    cfg = ast_config_load(config);
00547    if (!cfg) {
00548       ast_log(LOG_NOTICE, "Unable to load config for func_odbc: %s\n", config);
00549       AST_LIST_UNLOCK(&queries);
00550       return AST_MODULE_LOAD_DECLINE;
00551    }
00552 
00553    for (catg = ast_category_browse(cfg, NULL);
00554         catg;
00555         catg = ast_category_browse(cfg, catg)) {
00556       struct acf_odbc_query *query = NULL;
00557 
00558       if (init_acf_query(cfg, catg, &query)) {
00559          free_acf_query(query);
00560       } else {
00561          AST_LIST_INSERT_HEAD(&queries, query, list);
00562          ast_custom_function_register(query->acf);
00563       }
00564    }
00565 
00566    ast_config_destroy(cfg);
00567    ast_custom_function_register(&escape_function);
00568 
00569    AST_LIST_UNLOCK(&queries);
00570    return res;
00571 }
00572 
00573 static int odbc_unload_module(void)
00574 {
00575    struct acf_odbc_query *query;
00576 
00577    AST_LIST_LOCK(&queries);
00578    while (!AST_LIST_EMPTY(&queries)) {
00579       query = AST_LIST_REMOVE_HEAD(&queries, list);
00580       ast_custom_function_unregister(query->acf);
00581       free_acf_query(query);
00582    }
00583 
00584    ast_custom_function_unregister(&escape_function);
00585 
00586    /* Allow any threads waiting for this lock to pass (avoids a race) */
00587    AST_LIST_UNLOCK(&queries);
00588    AST_LIST_LOCK(&queries);
00589 
00590    AST_LIST_UNLOCK(&queries);
00591    return 0;
00592 }
00593 
00594 static int reload(void)
00595 {
00596    int res = 0;
00597    struct ast_config *cfg;
00598    struct acf_odbc_query *oldquery;
00599    char *catg;
00600 
00601    AST_LIST_LOCK(&queries);
00602 
00603    while (!AST_LIST_EMPTY(&queries)) {
00604       oldquery = AST_LIST_REMOVE_HEAD(&queries, list);
00605       ast_custom_function_unregister(oldquery->acf);
00606       free_acf_query(oldquery);
00607    }
00608 
00609    cfg = ast_config_load(config);
00610    if (!cfg) {
00611       ast_log(LOG_WARNING, "Unable to load config for func_odbc: %s\n", config);
00612       goto reload_out;
00613    }
00614 
00615    for (catg = ast_category_browse(cfg, NULL);
00616         catg;
00617         catg = ast_category_browse(cfg, catg)) {
00618       struct acf_odbc_query *query = NULL;
00619 
00620       if (init_acf_query(cfg, catg, &query)) {
00621          ast_log(LOG_ERROR, "Cannot initialize query %s\n", catg);
00622       } else {
00623          AST_LIST_INSERT_HEAD(&queries, query, list);
00624          ast_custom_function_register(query->acf);
00625       }
00626    }
00627 
00628    ast_config_destroy(cfg);
00629 reload_out:
00630    AST_LIST_UNLOCK(&queries);
00631    return res;
00632 }
00633 
00634 static int unload_module(void)
00635 {
00636    return odbc_unload_module();
00637 }
00638 
00639 static int load_module(void)
00640 {
00641    return odbc_load_module();
00642 }
00643 
00644 /* XXX need to revise usecount - set if query_lock is set */
00645 
00646 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "ODBC lookups",
00647       .load = load_module,
00648       .unload = unload_module,
00649       .reload = reload,
00650           );
00651 

Generated on Sat Apr 12 07:12:24 2008 for Asterisk - the Open Source PBX by  doxygen 1.5.5