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/* address range, for libreswan
*
* header file for Libreswan library functions
* Copyright (C) 1998, 1999, 2000 Henry Spencer.
* Copyright (C) 1999, 2000, 2001 Richard Guy Briggs
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <https://www.gnu.org/licenses/lgpl-2.1.txt>.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
* License for more details.
*
*/
#ifndef IP_RANGE_H
#define IP_RANGE_H
#include "err.h"
#include "ip_address.h"
#include "ip_subnet.h"
typedef struct {
ip_address start;
ip_address end;
bool is_subnet; /* hint for jam_range */
} ip_range;
/* caller knows best */
ip_range range(const ip_address *start, const ip_address *end);
ip_range range_from_subnet(const ip_subnet *subnet);
err_t ttorange(const char *src, const struct ip_info *afi, ip_range *dst) MUST_USE_RESULT;
/*
* Formatting
*/
typedef struct {
char buf[sizeof(address_buf) + 1/*"-"*/ + sizeof(address_buf)];
} range_buf;
size_t jam_range(struct jambuf *buf, const ip_range *range);
const char *str_range(const ip_range *range, range_buf *buf);
/*
* Magic values.
*
* XXX: While the headers call the all-zero address "ANY" (INADDR_ANY,
* IN6ADDR_ANY_INIT), the headers also refer to the IPv6 value as
* unspecified (for instance IN6_IS_ADDR_UNSPECIFIED()) leaving the
* term "unspecified" underspecified.
*
* Consequently an AF_UNSPEC address (i.e., uninitialized or unset),
* is identified by *_unset().
*/
extern const ip_range unset_range;
bool range_is_unset(const ip_range *r);
const struct ip_info *range_type(const ip_range *r);
bool range_is_specified(const ip_range *r);
bool range_eq(const ip_range *l, const ip_range *r);
/*
* Calculate the number of significant bits in the size of the range.
* floor(lg(|high-low| + 1))
*
* ??? this really should use ip_range rather than a pair of ip_address values
*/
int iprange_bits(ip_address low, ip_address high);
extern bool range_size(ip_range *r, uint32_t *size);
#endif
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