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/* ip address type, for libreswan
*
* Copyright (C) 2021 Andrew Cagney
*
* 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_BYTES_H
#define IP_BYTES_H
#include <stdint.h> /* for uint8_t */
struct ip_info;
enum ip_version;
/*
* We need something that makes static IPv4 initializers possible
* (struct in_addr requires htonl() which is run-time only).
*/
struct ip_bytes {
uint8_t byte[16];
};
extern const struct ip_bytes unset_ip_bytes;
#define PRI_IP_BYTES "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
#define pri_ip_bytes(B) \
(B).byte[0], \
(B).byte[1], \
(B).byte[2], \
(B).byte[3], \
(B).byte[4], \
(B).byte[5], \
(B).byte[6], \
(B).byte[7], \
(B).byte[8], \
(B).byte[9], \
(B).byte[10], \
(B).byte[11], \
(B).byte[12], \
(B).byte[13], \
(B).byte[14], \
(B).byte[15]
/*
* Modify address bytes broken down according to AFI as
* ROUTING-PREFIX:HOST-ID.
*/
extern const struct ip_routing_prefix_blit keep_routing_prefix;
extern const struct ip_routing_prefix_blit clear_routing_prefix;
extern const struct ip_routing_prefix_blit set_routing_prefix;
extern const struct ip_host_identifier_blit clear_host_identifier;
extern const struct ip_host_identifier_blit set_host_identifier;
struct ip_bytes ip_bytes_blit(const struct ip_info *afi,
const struct ip_bytes bytes,
const struct ip_routing_prefix_blit *routing_prefix,
const struct ip_host_identifier_blit *host_identifier,
int prefix_len);
/* Calculate l-r using unsigned arithmetic */
struct ip_bytes ip_bytes_sub(const struct ip_info *afi,
const struct ip_bytes l,
const struct ip_bytes r);
/* find first non-zero bit from left */
int ip_bytes_first_set_bit(const struct ip_info *afi,
const struct ip_bytes bytes);
/* match prefixes, or -1 */
int ip_bytes_prefix_len(const struct ip_info *afi,
const struct ip_bytes lo,
const struct ip_bytes hi);
int ip_bytes_host_len(const struct ip_info *afi,
const struct ip_bytes lo,
const struct ip_bytes hi);
int ip_bytes_mask_len(const struct ip_info *afi,
const struct ip_bytes bytes);
int ip_bytes_cmp(enum ip_version l_version, const struct ip_bytes l_bytes,
enum ip_version r_version, const struct ip_bytes r_bytes);
bool ip_bytes_is_zero(const struct ip_bytes *bytes);
#define IP_INFO_UNSET(IP) \
(IP == NULL ? "null" : \
!IP->is_set ? "unset" : \
IP->info == NULL ? "family-unset" : \
NULL)
#define IP_INFO_PROTOCOL_UNSET(IP) \
(IP == NULL ? "null" : \
!IP->is_set ? "unset" : \
IP->info == NULL ? "family-unset" : \
IP->protocol == NULL ? "protocol-unset" : \
NULL)
size_t jam_ip_bytes_range(struct jambuf *buf,
const struct ip_info *afi,
const struct ip_bytes lo,
const struct ip_bytes hi);
#endif
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