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* Software License Agreement (BSD License)                                                               *
* Author: Sebastien Decugis <sdecugis@freediameter.net>							 *
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/* Sample radius/diameter gateway plugin, for developers to see the structure of a plugin. */

#include "rgw_common.h"

/* The state of this extension */
struct rgwp_config {
	/* In a real extension, we would store the parsed configuration file, and the states of the extension */
	int init;
	
	/* If needed to store information between sent Diameter request and received answer, the session is probably the best place.
	  See rgwx_echodrop for an example. */
};

/* The function called at plugin initialization */
static int sample_conf_parse ( char * conf_file, struct rgwp_config ** state )
{
	TRACE_ENTRY("%p %p", conf_file, state);
	CHECK_PARAMS(state);
	
	CHECK_MALLOC( *state = malloc(sizeof(struct rgwp_config)) );
	
	(*state)->init = 1;
	
	return 0;
}

/* This function is called when the plugin is unloaded, to cleanup all the states */
static void sample_conf_free(struct rgwp_config * state)
{
	TRACE_ENTRY("%p", state);
	CHECK_PARAMS_DO( state, );
	free(state);
	return;
}

/* This function is called on incoming RADIUS messages. It should handle (some) RADIUS data and store into the Diameter message. */
static int sample_rad_req( struct rgwp_config * cs, struct radius_msg * rad_req, struct radius_msg ** rad_ans, struct msg ** diam_fw, struct rgw_client * cli )
{
	TRACE_ENTRY("%p %p %p %p %p", cs, rad_req, rad_ans, diam_fw, cli);
	CHECK_PARAMS(cs);
	TRACE_DEBUG(INFO, "RADIUS/Diameter Sample plugin received a new RADIUS message.");
	return 0;
}

/* This function is called when a Diameter answer is coming back. It should remove the AVPs and add the attributes in the RADIUS message. */
static int sample_diam_ans( struct rgwp_config * cs, struct msg ** diam_ans, struct radius_msg ** rad_fw, struct rgw_client * cli )
{
	TRACE_ENTRY("%p %p %p %p", cs, diam_ans, rad_fw, cli);
	CHECK_PARAMS(cs);
	TRACE_DEBUG(INFO, "RADIUS/Diameter Sample plugin received a new Diameter answer.");
	return 0;
}


/* Finally, we declare the structure that will be loaded by main RADIUS/Diameter gateway extension */
struct rgw_api rgwp_descriptor = {
	.rgwp_name       = "sample",
	.rgwp_conf_parse = sample_conf_parse,
	.rgwp_conf_free  = sample_conf_free,
	.rgwp_rad_req    = sample_rad_req,
	.rgwp_diam_ans   = sample_diam_ans
};