#ifndef MOD_DNSBL_LOOKUP_H
#define MOD_DNSBL_LOOKUP_H

#include <httpd.h>
#include <apr_optional.h>

/* Boolean-like result of a dnsbl lookup */
#define DNSBL_NEGATIVE  0   /* negative */
#define DNSBL_POSITIVE  1   /* positive match */
#define DNSBL_FAILURE   2   /* generic failure, not enabled or configured */

/* Types of queries for dnsbl_lookup_ip() and dnsbl_lookup_domain() */
#define DNSBL_ANYPOSTV_RETFIRST 0   /* Any positive from chain, stop and return first */
#define DNSBL_ANYPOSTV_RETEVERY 1   /* Any positive, check all and return every positive */
#define DNSBL_ALLPOSTV_RETEVERY 2   /* All must check positive, return every positive */

#define DNSBL_MATCH_ANY "any"

APR_DECLARE_OPTIONAL_FN(int, dnsbl_lookup_ip,
    (const char*, int, apr_sockaddr_t*, apr_pool_t*, server_rec*, apr_table_t**) );
	
APR_DECLARE_OPTIONAL_FN(int, dnsbl_lookup_domain,
    (const char*, int, const char*, apr_pool_t*, server_rec*, apr_table_t**) );
	
/*
    This structure defines a zone in a chain
    These are stored within hash tables - one table for IPv4 DNSBLs, another for RHSBLs
*/
typedef struct {
    const char* zonedomain;
    const char* postvresp; /* positive response, (sub)string or DNSBL_MATCH_ANY */
} zone_entry;

#endif