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/*
* This program 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_always.c
* @brief Return preconfigured fixed rcodes.
*
* @copyright 2000,2006 The FreeRADIUS server project
*/
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/modules.h>
#include <freeradius-devel/modpriv.h>
#include <freeradius-devel/modcall.h>
/*
* The instance data for rlm_always is the list of fake values we are
* going to return.
*/
typedef struct rlm_always_t {
char const *name; //!< Name of this instance of the always module.
char const *rcode_str; //!< The base value.
char const *rcode_old; //!< Make changing the rcode work with %{poke:} and radmin.
rlm_rcode_t rcode; //!< The integer constant representing rcode_str.
uint32_t simulcount;
bool mpp;
} rlm_always_t;
/*
* A mapping of configuration file names to internal variables.
*/
static const CONF_PARSER module_config[] = {
{ "rcode", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_always_t, rcode_str), "fail" },
{ "simulcount", FR_CONF_OFFSET(PW_TYPE_INTEGER, rlm_always_t, simulcount), "0" },
{ "mpp", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_always_t, mpp), "no" },
CONF_PARSER_TERMINATOR
};
/** Set module status or rcode
*
* Look ma, no locks...
*
* Example: "%{db_status:dead}"
*/
static ssize_t always_xlat(void *instance, REQUEST *request, char const *fmt, char *out, size_t outlen)
{
CONF_SECTION *cs;
module_instance_t *mi;
rlm_always_t *inst = instance;
char const *status = fmt;
char const *p;
size_t len;
cs = cf_section_find("modules");
if (!cs) return -1;
mi = module_find(cs, inst->name);
if (!mi) {
RERROR("Can't find the module that registered this xlat: %s", inst->name);
return -1;
}
/*
* Expand to the existing status
*/
p = "alive";
if (mi->force) {
p = fr_int2str(mod_rcode_table, mi->code, "<invalid>");
}
len = strlen(p);
if (outlen < len) {
RWARN("Output is too short!");
*out = '\0';
} else {
strncpy(out, p, outlen);
}
if (*fmt == '\0') goto done;
/*
* Set the module status
*/
if (strcmp(status, "alive") == 0) {
mi->force = false;
} else if (strcmp(status, "dead") == 0) {
mi->code = RLM_MODULE_FAIL;
mi->force = true;
} else {
int rcode;
rcode = fr_str2int(mod_rcode_table, status, -1);
if (rcode < 0) {
RWARN("Unknown status \"%s\"", status);
return -1;
}
mi->code = rcode;
mi->force = true;
}
done:
return strlen(out);
}
static int mod_bootstrap(CONF_SECTION *conf, void *instance)
{
rlm_always_t *inst = instance;
inst->name = cf_section_name2(conf);
if (!inst->name) {
inst->name = cf_section_name1(conf);
}
xlat_register(inst->name, always_xlat, NULL, inst);
return 0;
}
static int mod_instantiate(CONF_SECTION *conf, void *instance)
{
rlm_always_t *inst = instance;
/*
* Convert the rcode string to an int
*/
inst->rcode = fr_str2int(mod_rcode_table, inst->rcode_str, RLM_MODULE_UNKNOWN);
if (inst->rcode == RLM_MODULE_UNKNOWN) {
cf_log_err_cs(conf, "rcode value \"%s\" is invalid", inst->rcode_str);
return -1;
}
inst->rcode_old = NULL; /* Hack - forces the compiler not to optimise away rcode_old */
return 0;
}
/** Reparse the rcode if it changed
*
* @note Look ma, no locks...
*
* @param inst Module instance.
*/
static void reparse_rcode(rlm_always_t *inst)
{
rlm_rcode_t rcode;
rcode = fr_str2int(mod_rcode_table, inst->rcode_str, RLM_MODULE_UNKNOWN);
if (rcode == RLM_MODULE_UNKNOWN) {
WARN("rlm_always (%s): Ignoring rcode change. rcode value \"%s\" is invalid ", inst->name,
inst->rcode_str);
return;
}
inst->rcode = rcode;
inst->rcode_old = inst->rcode_str;
}
/*
* Just return the rcode ... this function is autz, auth, acct, and
* preacct!
*/
static rlm_rcode_t CC_HINT(nonnull) mod_always_return(void *instance, UNUSED REQUEST *request)
{
rlm_always_t *inst = instance;
if (inst->rcode_old != inst->rcode_str) reparse_rcode(inst);
return inst->rcode;
}
#ifdef WITH_SESSION_MGMT
/*
* checksimul fakes some other variables besides the rcode...
*/
static rlm_rcode_t CC_HINT(nonnull) mod_checksimul(void *instance, REQUEST *request)
{
struct rlm_always_t *inst = instance;
if (inst->rcode_old != inst->rcode_str) reparse_rcode(inst);
request->simul_count = inst->simulcount;
if (inst->mpp) request->simul_mpp = 2;
return inst->rcode;
}
#endif
extern module_t rlm_always;
module_t rlm_always = {
.magic = RLM_MODULE_INIT,
.name = "always",
.type = RLM_TYPE_HUP_SAFE,
.inst_size = sizeof(rlm_always_t),
.config = module_config,
.bootstrap = mod_bootstrap,
.instantiate = mod_instantiate,
.methods = {
[MOD_AUTHENTICATE] = mod_always_return,
[MOD_AUTHORIZE] = mod_always_return,
[MOD_PREACCT] = mod_always_return,
[MOD_ACCOUNTING] = mod_always_return,
#ifdef WITH_SESSION_MGMT
[MOD_SESSION] = mod_checksimul,
#endif
[MOD_PRE_PROXY] = mod_always_return,
[MOD_POST_PROXY] = mod_always_return,
[MOD_POST_AUTH] = mod_always_return,
#ifdef WITH_COA
[MOD_RECV_COA] = mod_always_return,
[MOD_SEND_COA] = mod_always_return
#endif
},
};
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