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/*
* Copyright (c) 2021-2022 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* \file ip_address.h
* \brief IP address type
*/
#ifndef UTIL_IP_ADDRESS_H
#define UTIL_IP_ADDRESS_H
#ifdef __APPLE__
#include <libkern/OSByteOrder.h>
#define __bswap_constant_32(x) OSSwapInt32 (x)
#include <machine/endian.h>
#else
#ifdef __ANDROID__
#include <byteswap.h>
#endif
#endif
#include <errno.h>
#include <assert.h>
#ifndef _WIN32
#include <netinet/in.h> // struct sockadd
#include <arpa/inet.h> // inet_ntop
#include <netdb.h> // struct addrinfo
#endif
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h> // snprintf
#include <string.h> // memset
#include "types.h"
#define bytes_to_bits(x) (x * 8)
#define IPV6_ADDR_LEN 16 /* bytes */
#define IPV4_ADDR_LEN 4 /* bytes */
#define IPV6_ADDR_LEN_BITS bytes_to_bits (IPV6_ADDR_LEN)
#define IPV4_ADDR_LEN_BITS bytes_to_bits (IPV4_ADDR_LEN)
#define MAX_IPV6_PREFIX_LEN 128
/* Presentation format */
#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN 16
#endif
#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN 46
#endif
//#define INET_MAX_ADDRSTRLEN INET6_ADDRSTRLEN
#define IP_ADDRESS_MAX_LEN IPV6_ADDR_LEN
#define DUMMY_PORT 1234
typedef union
{
struct in_addr as_inaddr;
u8 buffer[4];
u8 as_u8[4];
u16 as_u16[2];
u32 as_u32;
} ipv4_address_t;
static_assert (sizeof (ipv4_address_t) == 4, "");
typedef union __attribute__ ((__packed__))
{
struct in6_addr as_in6addr;
u8 buffer[16];
u8 as_u8[16];
u16 as_u16[8];
u32 as_u32[4];
u64 as_u64[2];
} ipv6_address_t;
static_assert (sizeof (ipv6_address_t) == 16, "");
#ifdef HICN_VPP_PLUGIN
#include <vnet/ip/ip46_address.h>
static_assert (sizeof (ipv4_address_t) == sizeof (ip4_address_t), "");
static_assert (sizeof (ipv6_address_t) == sizeof (ip6_address_t), "");
#endif
typedef union
{
struct
{
u32 pad[3];
ipv4_address_t v4;
};
ipv6_address_t v6;
#if 0 /* removed as prone to error due to IPv4 padding */
u8 buffer[IP_MAX_ADDR_LEN];
u8 as_u8[IP_MAX_ADDR_LEN];
u16 as_u16[IP_MAX_ADDR_LEN >> 1];
u32 as_u32[IP_MAX_ADDR_LEN >> 2];
u64 as_u64[IP_MAX_ADDR_LEN >> 3];
#endif
#ifdef HICN_VPP_PLUGIN
ip46_address_t as_ip46;
#endif /* HICN_VPP_PLUGIN */
} hicn_ip_address_t;
static_assert (sizeof (hicn_ip_address_t) == 16, "");
#define hicn_ip_address_is_v4(ip) \
(((ip)->pad[0] | (ip)->pad[1] | (ip)->pad[2]) == 0)
#define MAXSZ_IP4_ADDRESS_ INET_ADDRSTRLEN - 1
#define MAXSZ_IP6_ADDRESS_ INET6_ADDRSTRLEN - 1
#define MAXSZ_IP_ADDRESS_ MAXSZ_IP6_ADDRESS_
#define MAXSZ_IP4_ADDRESS MAXSZ_IP4_ADDRESS_ + 1
#define MAXSZ_IP6_ADDRESS MAXSZ_IP6_ADDRESS_ + 1
#define MAXSZ_IP_ADDRESS MAXSZ_IP_ADDRESS_ + 1
#define IP_ADDRESS_V4_OFFSET_LEN 12
typedef struct
{
int family;
hicn_ip_address_t address;
u8 len;
} hicn_ip_prefix_t;
#define MAXSZ_IP_PREFIX_ MAXSZ_IP_ADDRESS_ + 1 + 3
#define MAXSZ_IP_PREFIX MAXSZ_IP_PREFIX_ + 1
extern const hicn_ip_address_t IPV4_LOOPBACK;
extern const hicn_ip_address_t IPV6_LOOPBACK;
extern const hicn_ip_address_t IPV4_ANY;
extern const hicn_ip_address_t IPV6_ANY;
extern const ipv4_address_t IP4_ADDRESS_EMPTY;
extern const ipv6_address_t IP6_ADDRESS_EMPTY;
extern const hicn_ip_address_t IP_ADDRESS_EMPTY;
#define IP_ANY(family) (family == AF_INET) ? IPV4_ANY : IPV6_ANY
#define MAX_PORT 1 << (8 * sizeof (u16))
#define IS_VALID_PORT(x) ((x > 0) && ((int) x < MAX_PORT))
#define MAXSZ_PORT_ 5
#define MAXSZ_PORT MAXSZ_PORT_ + 1
#define IS_VALID_FAMILY(x) ((x == AF_INET) || (x == AF_INET6))
/* IP address */
int hicn_ip_address_get_family (const hicn_ip_address_t *address);
int hicn_ip_address_str_get_family (const char *ip_address);
int hicn_ip_address_len (int family);
int hicn_ip_address_get_len (const hicn_ip_address_t *ip_address);
int hicn_ip_address_get_len_bits (const hicn_ip_address_t *ip_address);
const u8 *hicn_ip_address_get_buffer (const hicn_ip_address_t *ip_address,
int family);
int hicn_ip_address_ntop (const hicn_ip_address_t *ip_address, char *dst,
const size_t len, int family);
int hicn_ip_address_pton (const char *ip_address_str,
hicn_ip_address_t *ip_address);
int hicn_ip_address_snprintf (char *s, size_t size,
const hicn_ip_address_t *ip_address);
int hicn_ip_address_to_sockaddr (const hicn_ip_address_t *ip_address,
struct sockaddr *sa, int family);
int hicn_ip_address_cmp (const hicn_ip_address_t *ip1,
const hicn_ip_address_t *ip2);
bool hicn_ip_address_equals (const hicn_ip_address_t *ip1,
const hicn_ip_address_t *ip2);
int hicn_ip_address_empty (const hicn_ip_address_t *ip);
uint8_t hicn_ip_address_get_bit (const hicn_ip_address_t *address,
uint8_t pos);
bool hicn_ip_address_match_family (const hicn_ip_address_t *address,
int family);
uint32_t hicn_ip_address_get_hash (const hicn_ip_address_t *address);
void hicn_ip_address_clear (hicn_ip_address_t *address);
/* Prefix */
int hicn_ip_prefix_pton (const char *ip_address_str,
hicn_ip_prefix_t *hicn_ip_prefix);
int hicn_ip_prefix_ntop_short (const hicn_ip_prefix_t *hicn_ip_prefix,
char *dst, size_t size);
int hicn_ip_prefix_ntop (const hicn_ip_prefix_t *hicn_ip_prefix, char *dst,
size_t size);
int hicn_ip_prefix_snprintf (char *s, size_t size,
const hicn_ip_prefix_t *prefix);
int hicn_ip_prefix_len (const hicn_ip_prefix_t *prefix);
bool hicn_ip_prefix_empty (const hicn_ip_prefix_t *prefix);
int hicn_ip_prefix_to_sockaddr (const hicn_ip_prefix_t *prefix,
struct sockaddr *sa);
int hicn_ip_prefix_cmp (const hicn_ip_prefix_t *prefix1,
const hicn_ip_prefix_t *prefix2);
/* URL */
#define MAXSZ_PROTO_ 8 /* inetX:// */
#define MAXSZ_PROTO MAXSZ_PROTO_ + NULLTERM
#define MAXSZ_URL4_ MAXSZ_PROTO_ + MAXSZ_IP4_ADDRESS_ + MAXSZ_PORT_
#define MAXSZ_URL6_ MAXSZ_PROTO_ + MAXSZ_IP6_ADDRESS_ + MAXSZ_PORT_
#define MAXSZ_URL_ MAXSZ_URL6_
#define MAXSZ_URL4 MAXSZ_URL4_ + NULLTERM
#define MAXSZ_URL6 MAXSZ_URL6_ + NULLTERM
#define MAXSZ_URL MAXSZ_URL_ + NULLTERM
int url_snprintf (char *s, size_t size, const hicn_ip_address_t *ip_address,
u16 port);
#endif /* UTIL_IP_ADDRESS_H */
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