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/* ip cidr (prefix/host-id), for libreswan
*
* Copyright (C) 2020 Andrew Cagney <cagney@gnu.org>
*
* 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_CIDR_H
#define IP_CIDR_H
/*
* NETWORK_PREFIX/HOST_IDENTIFIER
*
* Unlike ip_subnet, this allows a non-zero host_identifier.
*/
#include "ip_bytes.h"
#include "ip_version.h"
#include "ip_address.h"
struct jambuf;
typedef struct {
bool is_set;
enum ip_version version;
struct ip_bytes bytes;
unsigned prefix_len;
} ip_cidr;
#define PRI_CIDR "<cidr-%s:IPv%d["PRI_IP_BYTES"]/%u>"
#define pri_cidr(A) \
((A).is_set ? "set" : "unset"), \
(A).version, \
pri_ip_bytes((A).bytes), \
(A).prefix_len
void pexpect_cidr(const ip_cidr a, where_t where);
#define pcidr(A) pexpect_cidr(A, HERE)
extern const ip_cidr unset_cidr;
/* convert CIDR address/mask; does not judge the result */
ip_cidr cidr_from_raw(where_t where, const struct ip_info *afi,
const struct ip_bytes bytes,
unsigned prefix_bits);
diag_t data_to_cidr(const void *data, size_t data_size, unsigned prefix_len,
const struct ip_info *afi, ip_cidr *cidr) MUST_USE_RESULT;
#define hunk_to_cidr(HUNK, PREFIX_LEN, AFI, CIDR) \
data_to_cidr((HUNK).ptr, (HUNK).len, PREFIX_LEN, AFI, CIDR)
ip_cidr cidr_from_address(ip_address address);
/*
* return why, if CDIR isn't useful.
*
* "specified"? wikipedia refers to ::/0 as "Default route (no
* specific route)" and ::/128 as "Unspecified address". While these
* addresses are valid, they don't specifically specify anything...
*/
err_t cidr_check(const ip_cidr cidr);
bool cidr_is_specified(const ip_cidr cidr);
const struct ip_info *cidr_type(const ip_cidr *cidr); /* handles NULL */
const struct ip_info *cidr_info(const ip_cidr cidr);
ip_address cidr_address(const ip_cidr cidr);
ip_address cidr_prefix(const ip_cidr cidr);
ip_address cidr_host(const ip_cidr cidr);
int cidr_prefix_len(const ip_cidr cidr);
/* are two is_set() cidrs identical? */
bool cidr_eq_cidr(const ip_cidr address, const ip_cidr another);
/*
* Raw address bytes, both read-only and read-write.
*/
shunk_t cidr_as_shunk(const ip_cidr *cidr);
chunk_t cidr_as_chunk(ip_cidr *cidr);
err_t ttocidr_num(shunk_t src, const struct ip_info *afi, ip_cidr *cidr);
typedef struct {
char buf[sizeof(address_buf) + 4/*/128*/];
} cidr_buf;
size_t jam_cidr(struct jambuf *buf, const ip_cidr *cidr);
const char *str_cidr(const ip_cidr *cidr, cidr_buf*buf);
#endif
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