/***************************************************************************
 * nbase_addrset.h                                                               *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
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 ***************************************************************************/


#ifndef _NBASE_ADDRSET_H
#define _NBASE_ADDRSET_H

//#define HAVE_IPV6 1
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#ifndef WIN32
#include <sys/socket.h>
#endif

#include "nbase.h"

/* We use bit vectors to represent what values are allowed in an IPv4 octet.
   Each vector is built up of an array of bitvector_t (any convenient integer
   type). */
typedef unsigned long bitvector_t;
/* A 256-element bit vector, representing legal values for one octet. */
typedef bitvector_t octet_bitvector[(256 - 1) / (sizeof(unsigned long) * CHAR_BIT) + 1];

enum addrset_elem_type {
    ADDRSET_TYPE_IPV4_BITVECTOR,
#ifdef HAVE_IPV6
    ADDRSET_TYPE_IPV6_NETMASK,
#endif
};

/* A chain of tests for set inclusion. If one test is passed, the address is in
   the set. */
struct addrset_elem {
    enum addrset_elem_type type;
    union {
        struct {
            /* A bit vector for each address octet. */
            octet_bitvector bits[4];
        } ipv4;
#ifdef HAVE_IPV6
        struct {
            struct in6_addr addr;
            struct in6_addr mask;
        } ipv6;
#endif
    } u;
    struct addrset_elem *next;
};

#endif