Mon Mar 19 11:30:23 2012

Asterisk developer's documentation


cdr_radius.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.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  * \brief RADIUS CDR Support
00022  *
00023  * \author Philippe Sultan
00024  * \extref The Radius Client Library - http://developer.berlios.de/projects/radiusclient-ng/
00025  *
00026  * \arg See also \ref AstCDR
00027  * \ingroup cdr_drivers
00028  */
00029 
00030 /*** MODULEINFO
00031    <depend>radius</depend>
00032    <support_level>extended</support_level>
00033  ***/
00034 
00035 #include "asterisk.h"
00036 
00037 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 328209 $")
00038 
00039 #include <radiusclient-ng.h>
00040 
00041 #include "asterisk/channel.h"
00042 #include "asterisk/cdr.h"
00043 #include "asterisk/module.h"
00044 #include "asterisk/utils.h"
00045 
00046 /*! ISO 8601 standard format */
00047 #define DATE_FORMAT "%Y-%m-%d %T %z"
00048 
00049 #define VENDOR_CODE           22736
00050 
00051 enum {
00052    PW_AST_ACCT_CODE =    101,
00053    PW_AST_SRC =          102,
00054    PW_AST_DST =          103,
00055    PW_AST_DST_CTX =      104,
00056    PW_AST_CLID =         105,
00057    PW_AST_CHAN =         106,
00058    PW_AST_DST_CHAN =     107,
00059    PW_AST_LAST_APP =     108,
00060    PW_AST_LAST_DATA =    109,
00061    PW_AST_START_TIME =   110,
00062    PW_AST_ANSWER_TIME =  111,
00063    PW_AST_END_TIME =     112,
00064    PW_AST_DURATION =     113,
00065    PW_AST_BILL_SEC =     114,
00066    PW_AST_DISPOSITION =  115,
00067    PW_AST_AMA_FLAGS =    116,
00068    PW_AST_UNIQUE_ID =    117,
00069    PW_AST_USER_FIELD =   118
00070 };
00071 
00072 enum {
00073    /*! Log dates and times in UTC */
00074    RADIUS_FLAG_USEGMTIME = (1 << 0),
00075    /*! Log Unique ID */
00076    RADIUS_FLAG_LOGUNIQUEID = (1 << 1),
00077    /*! Log User Field */
00078    RADIUS_FLAG_LOGUSERFIELD = (1 << 2)
00079 };
00080 
00081 static const char desc[] = "RADIUS CDR Backend";
00082 static const char name[] = "radius";
00083 static const char cdr_config[] = "cdr.conf";
00084 
00085 static char radiuscfg[PATH_MAX] = "/etc/radiusclient-ng/radiusclient.conf";
00086 
00087 static struct ast_flags global_flags = { RADIUS_FLAG_USEGMTIME | RADIUS_FLAG_LOGUNIQUEID | RADIUS_FLAG_LOGUSERFIELD };
00088 
00089 static rc_handle *rh = NULL;
00090 
00091 static int build_radius_record(VALUE_PAIR **tosend, struct ast_cdr *cdr)
00092 {
00093    int recordtype = PW_STATUS_STOP;
00094    struct ast_tm tm;
00095    char timestr[128];
00096    char *tmp;
00097 
00098    if (!rc_avpair_add(rh, tosend, PW_ACCT_STATUS_TYPE, &recordtype, 0, 0))
00099       return -1;
00100 
00101    /* Account code */
00102    if (!rc_avpair_add(rh, tosend, PW_AST_ACCT_CODE, &cdr->accountcode, strlen(cdr->accountcode), VENDOR_CODE))
00103       return -1;
00104 
00105    /* Source */
00106    if (!rc_avpair_add(rh, tosend, PW_AST_SRC, &cdr->src, strlen(cdr->src), VENDOR_CODE))
00107       return -1;
00108 
00109    /* Destination */
00110    if (!rc_avpair_add(rh, tosend, PW_AST_DST, &cdr->dst, strlen(cdr->dst), VENDOR_CODE))
00111       return -1;
00112 
00113    /* Destination context */
00114    if (!rc_avpair_add(rh, tosend, PW_AST_DST_CTX, &cdr->dcontext, strlen(cdr->dcontext), VENDOR_CODE))
00115       return -1;
00116 
00117    /* Caller ID */
00118    if (!rc_avpair_add(rh, tosend, PW_AST_CLID, &cdr->clid, strlen(cdr->clid), VENDOR_CODE))
00119       return -1;
00120 
00121    /* Channel */
00122    if (!rc_avpair_add(rh, tosend, PW_AST_CHAN, &cdr->channel, strlen(cdr->channel), VENDOR_CODE))
00123       return -1;
00124 
00125    /* Destination Channel */
00126    if (!rc_avpair_add(rh, tosend, PW_AST_DST_CHAN, &cdr->dstchannel, strlen(cdr->dstchannel), VENDOR_CODE))
00127       return -1;
00128 
00129    /* Last Application */
00130    if (!rc_avpair_add(rh, tosend, PW_AST_LAST_APP, &cdr->lastapp, strlen(cdr->lastapp), VENDOR_CODE))
00131       return -1;
00132 
00133    /* Last Data */
00134    if (!rc_avpair_add(rh, tosend, PW_AST_LAST_DATA, &cdr->lastdata, strlen(cdr->lastdata), VENDOR_CODE))
00135       return -1;
00136 
00137 
00138    /* Start Time */
00139    ast_strftime(timestr, sizeof(timestr), DATE_FORMAT,
00140       ast_localtime(&cdr->start, &tm,
00141          ast_test_flag(&global_flags, RADIUS_FLAG_USEGMTIME) ? "GMT" : NULL));
00142    if (!rc_avpair_add(rh, tosend, PW_AST_START_TIME, timestr, strlen(timestr), VENDOR_CODE))
00143       return -1;
00144 
00145    /* Answer Time */
00146    ast_strftime(timestr, sizeof(timestr), DATE_FORMAT,
00147       ast_localtime(&cdr->answer, &tm,
00148          ast_test_flag(&global_flags, RADIUS_FLAG_USEGMTIME) ? "GMT" : NULL));
00149    if (!rc_avpair_add(rh, tosend, PW_AST_ANSWER_TIME, timestr, strlen(timestr), VENDOR_CODE))
00150       return -1;
00151 
00152    /* End Time */
00153    ast_strftime(timestr, sizeof(timestr), DATE_FORMAT,
00154       ast_localtime(&cdr->end, &tm,
00155          ast_test_flag(&global_flags, RADIUS_FLAG_USEGMTIME) ? "GMT" : NULL));
00156    if (!rc_avpair_add(rh, tosend, PW_AST_END_TIME, timestr, strlen(timestr), VENDOR_CODE))
00157       return -1;
00158 
00159    /* Duration */
00160    if (!rc_avpair_add(rh, tosend, PW_AST_DURATION, &cdr->duration, 0, VENDOR_CODE))
00161       return -1;
00162 
00163    /* Billable seconds */
00164    if (!rc_avpair_add(rh, tosend, PW_AST_BILL_SEC, &cdr->billsec, 0, VENDOR_CODE))
00165       return -1;
00166 
00167    /* Disposition */
00168    tmp = ast_cdr_disp2str(cdr->disposition);
00169    if (!rc_avpair_add(rh, tosend, PW_AST_DISPOSITION, tmp, strlen(tmp), VENDOR_CODE))
00170       return -1;
00171 
00172    /* AMA Flags */
00173    tmp = ast_cdr_flags2str(cdr->amaflags);
00174    if (!rc_avpair_add(rh, tosend, PW_AST_AMA_FLAGS, tmp, strlen(tmp), VENDOR_CODE))
00175       return -1;
00176 
00177    if (ast_test_flag(&global_flags, RADIUS_FLAG_LOGUNIQUEID)) {
00178       /* Unique ID */
00179       if (!rc_avpair_add(rh, tosend, PW_AST_UNIQUE_ID, &cdr->uniqueid, strlen(cdr->uniqueid), VENDOR_CODE))
00180          return -1;
00181    }
00182 
00183    if (ast_test_flag(&global_flags, RADIUS_FLAG_LOGUSERFIELD)) {
00184       /* append the user field */
00185       if (!rc_avpair_add(rh, tosend, PW_AST_USER_FIELD, &cdr->userfield, strlen(cdr->userfield), VENDOR_CODE))
00186          return -1;
00187    }
00188 
00189    /* Setting Acct-Session-Id & User-Name attributes for proper generation
00190       of Acct-Unique-Session-Id on server side */
00191    /* Channel */
00192    if (!rc_avpair_add(rh, tosend, PW_USER_NAME, &cdr->channel, strlen(cdr->channel), 0))
00193       return -1;
00194 
00195    /* Unique ID */
00196    if (!rc_avpair_add(rh, tosend, PW_ACCT_SESSION_ID, &cdr->uniqueid, strlen(cdr->uniqueid), 0))
00197       return -1;
00198 
00199    return 0;
00200 }
00201 
00202 static int radius_log(struct ast_cdr *cdr)
00203 {
00204    int result = ERROR_RC;
00205    VALUE_PAIR *tosend = NULL;
00206 
00207    if (build_radius_record(&tosend, cdr)) {
00208       ast_debug(1, "Unable to create RADIUS record. CDR not recorded!\n");
00209       goto return_cleanup;
00210    }
00211 
00212    result = rc_acct(rh, 0, tosend);
00213    if (result != OK_RC) {
00214       ast_log(LOG_ERROR, "Failed to record Radius CDR record!\n");
00215    }
00216 
00217 return_cleanup:
00218    if (tosend) {
00219       rc_avpair_free(tosend);
00220    }
00221 
00222    return result;
00223 }
00224 
00225 static int unload_module(void)
00226 {
00227    ast_cdr_unregister(name);
00228    if (rh) {
00229       rc_destroy(rh);
00230       rh = NULL;
00231    }
00232    return 0;
00233 }
00234 
00235 static int load_module(void)
00236 {
00237    struct ast_config *cfg;
00238    struct ast_flags config_flags = { 0 };
00239    const char *tmp;
00240 
00241    if ((cfg = ast_config_load(cdr_config, config_flags)) && cfg != CONFIG_STATUS_FILEINVALID) {
00242       ast_set2_flag(&global_flags, ast_true(ast_variable_retrieve(cfg, "radius", "usegmtime")), RADIUS_FLAG_USEGMTIME);
00243       ast_set2_flag(&global_flags, ast_true(ast_variable_retrieve(cfg, "radius", "loguniqueid")), RADIUS_FLAG_LOGUNIQUEID);
00244       ast_set2_flag(&global_flags, ast_true(ast_variable_retrieve(cfg, "radius", "loguserfield")), RADIUS_FLAG_LOGUSERFIELD);
00245       if ((tmp = ast_variable_retrieve(cfg, "radius", "radiuscfg")))
00246          ast_copy_string(radiuscfg, tmp, sizeof(radiuscfg));
00247       ast_config_destroy(cfg);
00248    } else
00249       return AST_MODULE_LOAD_DECLINE;
00250 
00251    /*
00252     * start logging
00253     *
00254     * NOTE: Yes this causes a slight memory leak if the module is
00255     * unloaded.  However, it is better than a crash if cdr_radius
00256     * and cel_radius are both loaded.
00257     */
00258    tmp = ast_strdup("asterisk");
00259    if (tmp) {
00260       rc_openlog((char *) tmp);
00261    }
00262 
00263    /* read radiusclient-ng config file */
00264    if (!(rh = rc_read_config(radiuscfg))) {
00265       ast_log(LOG_NOTICE, "Cannot load radiusclient-ng configuration file %s.\n", radiuscfg);
00266       return AST_MODULE_LOAD_DECLINE;
00267    }
00268 
00269    /* read radiusclient-ng dictionaries */
00270    if (rc_read_dictionary(rh, rc_conf_str(rh, "dictionary"))) {
00271       ast_log(LOG_NOTICE, "Cannot load radiusclient-ng dictionary file.\n");
00272       rc_destroy(rh);
00273       rh = NULL;
00274       return AST_MODULE_LOAD_DECLINE;
00275    }
00276 
00277    if (ast_cdr_register(name, desc, radius_log)) {
00278       rc_destroy(rh);
00279       rh = NULL;
00280       return AST_MODULE_LOAD_DECLINE;
00281    } else {
00282       return AST_MODULE_LOAD_SUCCESS;
00283    }
00284 }
00285 
00286 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "RADIUS CDR Backend",
00287       .load = load_module,
00288       .unload = unload_module,
00289       .load_pri = AST_MODPRI_CDR_DRIVER,
00290    );

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