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* Software License Agreement (BSD License)                                                               *
* Authors: Sebastien Decugis <sdecugis@freediameter.net>						 *
* and Thomas Klausner <tk@giga.or.at>									 *
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#include "rt_redir.h"

struct dict_object * redir_dict_dr = NULL;
struct dict_object * redir_dict_un = NULL;

static struct fd_rt_fwd_hdl * fwd_hdl = NULL;
static struct fd_rt_out_hdl * out_hdl = NULL;
static pthread_t exp_thr  = (pthread_t)NULL;

/* Initialize the module */
static int redir_entry(char * conffile)
{
	TRACE_ENTRY("");

	/* Dictionary objects */
	CHECK_FCT(  fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "Destination-Realm", &redir_dict_dr, ENOENT)  );
	CHECK_FCT(  fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, "User-Name", &redir_dict_un, ENOENT)  );

	/* Initialize the entries array */
	CHECK_FCT( redir_entry_init() );

	/* Start the expire thread */
	CHECK_POSIX( pthread_create( &exp_thr, NULL, redir_exp_thr_fct, NULL ) );

	/* Register the callback that receives the answers and processes when it contains a Redirect indication. */
	CHECK_FCT( fd_rt_fwd_register ( redir_fwd_cb, NULL, RT_FWD_ANS, &fwd_hdl ) );

	/* Register the callback that applies the saved Redirect rules to outgoing messages. */
	CHECK_FCT( fd_rt_out_register ( redir_out_cb, NULL, 10, &out_hdl ) );

	return 0;
}

EXTENSION_ENTRY("rt_redirect", redir_entry);

/* And terminate it */
void fd_ext_fini(void)
{
	/* Unregister the callbacks */
	if (fwd_hdl) {
		CHECK_FCT_DO( fd_rt_fwd_unregister(fwd_hdl, NULL), );
	}
	if (out_hdl) {
		CHECK_FCT_DO( fd_rt_out_unregister(out_hdl, NULL), );
	}

	/* Stop the expiry thread */
	CHECK_FCT_DO( fd_thr_term(&exp_thr), );

	/* Empty all entries */
	redir_entry_fini();

	return;
}