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/*
* Copyright (c) 2017-2019 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 support
*/
#ifndef IP_ADDRESS_H
#define IP_ADDRESS_H
#include <arpa/inet.h> // inet_ntop
#ifdef __APPLE__
#include <libkern/OSByteOrder.h>
#define __bswap_constant_32(x) OSSwapInt32(x)
#include <machine/endian.h>
#else
#include <endian.h>
#ifdef __ANDROID__
#include <byteswap.h>
#endif
#endif
#include <errno.h>
#include <netdb.h> // struct addrinfo
#include <netinet/in.h> // INET*_ADDRSTRLEN, IN*ADDR_LOOPBACK
#include <stdlib.h>
#include <string.h> // memset
#include <hicn/api/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 IP_MAX_ADDR_LEN IPV6_ADDR_LEN
#define DUMMY_PORT 1234
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
typedef union {
union {
struct in_addr as_inaddr;
u8 as_u8[4];
u16 as_u16[2];
u32 as_u32;
} v4;
union {
struct in6_addr as_in6addr;
u8 as_u8[16];
u16 as_u16[8];
u32 as_u32[4];
u64 as_u64[2];
} v6;
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];
} ip_address_t;
#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
/* No htonl() with const */
static const ip_address_t IPV4_LOOPBACK = {
#if __BYTE_ORDER == __LITTLE_ENDIAN
#ifdef __ANDROID__
.v4.as_inaddr.s_addr = bswap_32(INADDR_LOOPBACK),
#else
.v4.as_inaddr.s_addr = __bswap_constant_32(INADDR_LOOPBACK),
#endif
#else
.v4.as_inaddr.s_addr = INADDR_LOOPBACK,
#endif
};
static const ip_address_t IPV6_LOOPBACK = {
.v6.as_in6addr = IN6ADDR_LOOPBACK_INIT,
};
#define MAX_PORT 1 << (8 * sizeof(u16))
#define IS_VALID_PORT(x) ((x > 0) && (x < MAX_PORT))
#define MAXSZ_PORT_ 5
#define MAXSZ_PORT MAXSZ_PORT_ + 1
#define IS_VALID_FAMILY(x) ((x == AF_INET) || (x == AF_INET6))
static inline int ip_address_get_family(const char *ip_address) {
struct addrinfo hint, *res = NULL;
int rc;
memset(&hint, '\0', sizeof hint);
hint.ai_family = PF_UNSPEC;
hint.ai_flags = AI_NUMERICHOST;
rc = getaddrinfo(ip_address, NULL, &hint, &res);
if (rc) {
return -1;
}
rc = res->ai_family;
freeaddrinfo(res);
return rc;
}
static inline int ip_address_len(const ip_address_t *ip_address, int family) {
return (family == AF_INET6) ? IPV6_ADDR_LEN
: (family == AF_INET) ? IPV4_ADDR_LEN : 0;
}
static inline int ip_address_ntop(const ip_address_t *ip_address, char *dst,
const size_t len, int family) {
const char *s = inet_ntop(family, ip_address->buffer, dst, len);
return (s ? 1 : -1);
}
/*
* Parse ip addresses in presentation format, or prefixes (in bits, separated by
* a slash)
*/
static inline int ip_address_pton(const char *ip_address_str,
ip_address_t *ip_address) {
int pton_fd;
#ifdef IP_ADDRESS_PREFIX
char *p;
char *eptr;
u32 dst_len;
#endif /* IP_ADDRESS_PREFIX */
char *addr = strdup(ip_address_str);
int family;
#ifdef IP_ADDRESS_PREFIX
p = strchr(addr, '/');
if (!p) {
dst_len = 0; // until we get the ip address family
} else {
dst_len = strtoul(p + 1, &eptr, 10);
*p = 0;
}
#endif /* IP_ADDRESS_PREFIX */
family = ip_address_get_family(addr);
switch (family) {
case AF_INET6:
#ifdef IP_ADDRESS_PREFIX
if (dst_len > IPV6_ADDR_LEN_BITS) goto ERR;
#endif /* IP_ADDRESS_PREFIX */
pton_fd = inet_pton(AF_INET6, addr, &ip_address->buffer);
break;
case AF_INET:
#ifdef IP_ADDRESS_PREFIX
if (dst_len > IPV4_ADDR_LEN_BITS) goto ERR;
#endif /* IP_ADDRESS_PREFIX */
pton_fd = inet_pton(AF_INET, addr, &ip_address->buffer);
break;
default:
goto ERR;
}
// 0 = not in presentation format
// < 0 = other error (use perror)
if (pton_fd <= 0) {
goto ERR;
}
return 1;
ERR:
free(addr);
return -1;
}
static inline int ip_address_snprintf(char *s, size_t size,
const ip_address_t *ip_address,
int family) {
size_t len = family == AF_INET ? INET_ADDRSTRLEN : INET6_ADDRSTRLEN;
const char *rc = inet_ntop(family, ip_address->buffer, s, len);
return rc ? strlen(rc) : -1;
}
static inline int ip_address_to_sockaddr(const ip_address_t *ip_address,
struct sockaddr *sockaddr_address,
int family) {
struct sockaddr_in6 *tmp6 = (struct sockaddr_in6 *)sockaddr_address;
struct sockaddr_in *tmp4 = (struct sockaddr_in *)sockaddr_address;
switch (family) {
case AF_INET6:
tmp6->sin6_family = AF_INET6;
tmp6->sin6_port = DUMMY_PORT;
tmp6->sin6_scope_id = 0;
memcpy(&tmp6->sin6_addr, ip_address->buffer, IPV6_ADDR_LEN);
break;
case AF_INET:
tmp4->sin_family = AF_INET;
tmp4->sin_port = DUMMY_PORT;
memcpy(&tmp4->sin_addr, ip_address->buffer, IPV4_ADDR_LEN);
break;
default:
return -1;
}
return 1;
}
#endif /* IP_ADDRESS_H */
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