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/*
* This program is is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* $Id$
* @file rlm_rediswho.c
* @brief Session tracking using redis.
*
* @copyright 2000,2006 The FreeRADIUS server project
* @copyright 2011 TekSavvy Solutions <gabe@teksavvy.com>
*/
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <ctype.h>
#include <rlm_redis.h>
typedef struct rlm_rediswho_t {
char const *xlat_name;
CONF_SECTION *cs;
char const *redis_instance_name;
REDIS_INST *redis_inst;
/*
* expiry time in seconds if no updates are received for a user
*/
int expiry_time;
/*
* How many session updates to keep track of per user
*/
int trim_count;
/*
* These are used only for parsing. They aren't used at run-time.
*/
char const *insert;
char const *trim;
char const *expire;
} rlm_rediswho_t;
static CONF_PARSER section_config[] = {
{ "insert", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_REQUIRED | PW_TYPE_XLAT, rlm_rediswho_t, insert), NULL },
{ "trim", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_rediswho_t, trim), NULL }, /* required only if trim_count > 0 */
{ "expire", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_REQUIRED | PW_TYPE_XLAT, rlm_rediswho_t, expire), NULL },
CONF_PARSER_TERMINATOR
};
static CONF_PARSER module_config[] = {
{ "redis-instance-name", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_DEPRECATED, rlm_rediswho_t, redis_instance_name), NULL },
{ "redis_module_instance", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_rediswho_t, redis_instance_name), "redis" },
{ "trim-count", FR_CONF_OFFSET(PW_TYPE_SIGNED | PW_TYPE_DEPRECATED, rlm_rediswho_t, trim_count), NULL },
{ "trim_count", FR_CONF_OFFSET(PW_TYPE_SIGNED, rlm_rediswho_t, trim_count), "-1" },
/*
* These all smash the same variables, because we don't care about them right now.
* In 3.1, we should have a way of saying "parse a set of sub-sections according to a template"
*/
{ "Start", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), section_config },
{ "Interim-Update", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), section_config },
{ "Stop", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), section_config },
CONF_PARSER_TERMINATOR
};
/*
* Query the database executing a command with no result rows
*/
static int rediswho_command(char const *fmt, REDISSOCK **dissocket_p,
rlm_rediswho_t *inst, REQUEST *request)
{
REDISSOCK *dissocket;
int result = 0;
if (!fmt) {
return 0;
}
if (inst->redis_inst->redis_query(dissocket_p, inst->redis_inst,
fmt, request) < 0) {
ERROR("rediswho_command: database query error in: '%s'", fmt);
return -1;
}
dissocket = *dissocket_p;
switch (dissocket->reply->type) {
case REDIS_REPLY_INTEGER:
DEBUG("rediswho_command: query response %lld\n",
dissocket->reply->integer);
if (dissocket->reply->integer > 0)
result = dissocket->reply->integer;
break;
case REDIS_REPLY_STATUS:
case REDIS_REPLY_STRING:
DEBUG("rediswho_command: query response %s\n",
dissocket->reply->str);
break;
default:
break;
}
(inst->redis_inst->redis_finish_query)(dissocket);
return result;
}
static int mod_instantiate(CONF_SECTION *conf, void *instance)
{
module_instance_t *modinst;
rlm_rediswho_t *inst = instance;
inst->xlat_name = cf_section_name2(conf);
if (!inst->xlat_name)
inst->xlat_name = cf_section_name1(conf);
inst->cs = conf;
modinst = module_instantiate(cf_section_find("modules"),
inst->redis_instance_name);
if (!modinst) {
ERROR("rediswho: failed to find module instance \"%s\"",
inst->redis_instance_name);
return -1;
}
if (strcmp(modinst->entry->name, "rlm_redis") != 0) {
ERROR("rediswho: Module \"%s\""
" is not an instance of the redis module",
inst->redis_instance_name);
return -1;
}
inst->redis_inst = (REDIS_INST *) modinst->insthandle;
return 0;
}
static int mod_accounting_all(REDISSOCK **dissocket_p,
rlm_rediswho_t *inst, REQUEST *request,
char const *insert,
char const *trim,
char const *expire)
{
int result;
result = rediswho_command(insert, dissocket_p, inst, request);
if (result < 0) {
return RLM_MODULE_FAIL;
}
/* Only trim if necessary */
if (inst->trim_count >= 0 && result > inst->trim_count) {
if (rediswho_command(trim, dissocket_p,
inst, request) < 0) {
return RLM_MODULE_FAIL;
}
}
if (rediswho_command(expire, dissocket_p, inst, request) < 0) {
return RLM_MODULE_FAIL;
}
return RLM_MODULE_OK;
}
static rlm_rcode_t CC_HINT(nonnull) mod_accounting(void * instance, REQUEST * request)
{
rlm_rcode_t rcode;
VALUE_PAIR * vp;
DICT_VALUE *dv;
CONF_SECTION *cs;
char const *insert, *trim, *expire;
rlm_rediswho_t *inst = (rlm_rediswho_t *) instance;
REDISSOCK *dissocket;
vp = fr_pair_find_by_num(request->packet->vps, PW_ACCT_STATUS_TYPE, 0, TAG_ANY);
if (!vp) {
RDEBUG("Could not find account status type in packet");
return RLM_MODULE_NOOP;
}
dv = dict_valbyattr(vp->da->attr, vp->da->vendor, vp->vp_integer);
if (!dv) {
RDEBUG("Unknown Acct-Status-Type %u", vp->vp_integer);
return RLM_MODULE_NOOP;
}
cs = cf_section_sub_find(inst->cs, dv->name);
if (!cs) {
RDEBUG("No subsection %s", dv->name);
return RLM_MODULE_NOOP;
}
dissocket = fr_connection_get(inst->redis_inst->pool);
if (!dissocket) return RLM_MODULE_FAIL;
insert = cf_pair_value(cf_pair_find(cs, "insert"));
trim = cf_pair_value(cf_pair_find(cs, "trim"));
expire = cf_pair_value(cf_pair_find(cs, "expire"));
rcode = mod_accounting_all(&dissocket, inst, request,
insert,
trim,
expire);
if (dissocket) fr_connection_release(inst->redis_inst->pool, dissocket);
return rcode;
}
extern module_t rlm_rediswho;
module_t rlm_rediswho = {
.magic = RLM_MODULE_INIT,
.name = "rediswho",
.type = RLM_TYPE_THREAD_SAFE,
.inst_size = sizeof(rlm_rediswho_t),
.config = module_config,
.instantiate = mod_instantiate,
.methods = {
[MOD_ACCOUNTING] = mod_accounting
},
};
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