extensions/app_radgw/rgwx_echodrop.h

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/*  RADIUS translation plugin, 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) */
/* This extension is a kind of swiss army-knife for interoperability, must be used with care. 
  All attribute behaviors are specified through the configuration file of the extension
 */

#include "rgw_common.h"

/* Action associated with an attribute */
#define ACT_ECHO 1
#define ACT_DROP 2

/* Result of configuration parsing */
struct rgwp_config {
	/* list of attributes and associated actions */
	struct fd_list attributes;
	
	/* Handler to store the echo'ed attributes values */
	struct session_handler * sess_hdl;
};

/* An item of the attribute list */
struct ed_conf_attribute {
	struct fd_list 	chain;	/* link in the list */
	
	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 */
};

/* For ECHO items, we save a list of these in the session */
struct ed_saved_attribute {
	struct fd_list		chain;
	struct radius_attr_hdr  attr; /* copy of the attribute */
	/* The data of the attribute follows ... */
};


/* The yacc parser */
int ed_conffile_parse(char * conffile, struct rgwp_config *cs);