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* Software License Agreement (BSD License)                                                               *
* Author: Sebastien Decugis <sdecugis@nict.go.jp>							 *
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* Copyright (c) 2009, WIDE Project and NICT								 *
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/* Sub-extension for radius_gw, to handle specific RADIUS attributes by either caching them and 
adding them to a corresponding RADIUS reply, or just dropping the attributes (no conversion to Diameter) */

#ifndef _SUB_ECHO_DROP
#define _SUB_ECHO_DROP

/* Default debug level for the extension */
#ifndef SUB_ECHO_DROP_VERBO
#define SUB_ECHO_DROP_VERBO 0
#endif /* SUB_ECHO_DROP_VERBO */

#define IN_EXTENSION
#define DEFINE_DEBUG_MACRO	sub_echo_drop

#include <waaad/waaad.h>
#include "rg_common.h"
#include <stdint.h>

extern int sub_echo_drop_verbosity;

/* Action to perform on an attribute */
#define ACT_ECHO 1
#define ACT_DROP 2

/* Parsed configuration: list of attributes and associated actions */
struct sed_conf_item {
	struct rg_list 	chain;
	
	struct {
		unsigned	action 	:2;	/* ACT_ECHO or ACT_DROP */
		unsigned	vsa	:1;	/* Interpret as Vendor-Specific, and match the vendor id in addition to the code */
		unsigned	tlv	:1;	/* Interpret as Vendor-Specific with TLV format, and match the type also */
		unsigned	ext	:1;	/* Interpret as radius extended attribute, and match the ext-type also */
	};
	
	uint32_t	vendor_id; /* vendor id to match when vsa = 1 */
	uint16_t	extype; /* Ext-Type value to match if ext = 1 */
	uint8_t		type; /* Type value to match if tlv = 1; */
	
	uint8_t		code; /* The attribute code, the list is ordered by this value */
};

/* The structure that holds both configuration and state */
struct rga_conf_state {
	/* Input: configuration file */
	char * conffile;
	
	/* Parsed configuration: what to do with attributes (list of struct sed_conf_item) */
	struct rg_list conf;
	
	/* Session handler where "echo" attributes are kept */
	sess_reg_t * sess_hdl;
};

/* For ECHO items, we save a list of these in the session */
struct sed_saved_item {
	struct rg_list		chain;
	struct radius_attr_hdr  attr; /* copy of the attribute content, including the data */
};
	

/* The yacc parser */
int sed_conf_parse(struct rga_conf_state *cs);

#endif /* _SUB_ECHO_DROP */