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zephyr/include/net/net_ip.h

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/** @file
* @brief IPv6 and IPv4 definitions
*
* Generic IPv6 and IPv4 address definitions.
*/
/*
* Copyright (c) 2016 Intel Corporation
*
* 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.
*/
#ifndef __NET_IP_H
#define __NET_IP_H
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <misc/byteorder.h>
#include <toolchain.h>
#include <net/net_linkaddr.h>
#ifdef __cplusplus
extern "C" {
#endif
/** Protocol families */
#define PF_UNSPEC 0 /* Unspecified. */
#define PF_INET 2 /* IP protocol family. */
#define PF_INET6 10 /* IP version 6. */
/** Address families. */
#define AF_UNSPEC PF_UNSPEC
#define AF_INET PF_INET
#define AF_INET6 PF_INET6
/** Protocol numbers from IANA */
enum net_ip_protocol {
IPPROTO_ICMP = 1,
IPPROTO_TCP = 6,
IPPROTO_UDP = 17,
IPPROTO_ICMPV6 = 58,
};
/** Socket type */
enum net_sock_type {
SOCK_DGRAM = 1,
SOCK_STREAM,
};
#define ntohs(x) sys_be16_to_cpu(x)
#define ntohl(x) sys_be32_to_cpu(x)
#define htons(x) sys_cpu_to_be16(x)
#define htonl(x) sys_cpu_to_be32(x)
/** IPv6 address structure */
struct in6_addr {
union {
uint8_t u6_addr8[16];
uint16_t u6_addr16[8]; /* In big endian */
uint32_t u6_addr32[4]; /* In big endian */
} in6_u;
#define s6_addr in6_u.u6_addr8
#define s6_addr16 in6_u.u6_addr16
#define s6_addr32 in6_u.u6_addr32
};
/** IPv4 address */
struct in_addr {
union {
uint8_t u4_addr8[4];
uint16_t u4_addr16[2]; /* In big endian */
uint32_t u4_addr32[1]; /* In big endian */
} in4_u;
#define s4_addr in4_u.u4_addr8
#define s4_addr16 in4_u.u4_addr16
#define s4_addr32 in4_u.u4_addr32
#define s_addr s4_addr32
};
typedef unsigned short int sa_family_t;
typedef size_t socklen_t;
/**
* Note that the sin_port and sin6_port are in network byte order
* in various sockaddr* structs.
*/
struct sockaddr_in6 {
sa_family_t sin6_family; /* AF_INET6 */
uint16_t sin6_port; /* Port number */
struct in6_addr sin6_addr; /* IPv6 address */
uint8_t sin6_scope_id; /* interfaces for a scope */
};
struct sockaddr_in6_ptr {
sa_family_t sin6_family; /* AF_INET6 */
uint16_t sin6_port; /* Port number */
struct in6_addr *sin6_addr; /* IPv6 address */
uint8_t sin6_scope_id; /* interfaces for a scope */
};
struct sockaddr_in {
sa_family_t sin_family; /* AF_INET */
uint16_t sin_port; /* Port number */
struct in_addr sin_addr; /* IPv4 address */
};
struct sockaddr_in_ptr {
sa_family_t sin_family; /* AF_INET */
uint16_t sin_port; /* Port number */
struct in_addr *sin_addr; /* IPv4 address */
};
#if defined(CONFIG_NET_IPV6)
#define NET_SOCKADDR_MAX_SIZE (sizeof(struct sockaddr_in6))
#define NET_SOCKADDR_PTR_MAX_SIZE (sizeof(struct sockaddr_in6_ptr))
#elif defined(CONFIG_NET_IPV4)
#define NET_SOCKADDR_MAX_SIZE (sizeof(struct sockaddr_in))
#define NET_SOCKADDR_PTR_MAX_SIZE (sizeof(struct sockaddr_in_ptr))
#else
#if !defined(CONFIG_NET_L2_RAW_CHANNEL)
#error "Either IPv6 or IPv4 needs to be selected."
#else
#define NET_SOCKADDR_MAX_SIZE (sizeof(struct sockaddr_in6))
#define NET_SOCKADDR_PTR_MAX_SIZE (sizeof(struct sockaddr_in6_ptr))
#endif
#endif
struct sockaddr {
sa_family_t family;
char data[NET_SOCKADDR_MAX_SIZE - sizeof(sa_family_t)];
};
struct sockaddr_ptr {
sa_family_t family;
char data[NET_SOCKADDR_PTR_MAX_SIZE - sizeof(sa_family_t)];
};
struct net_addr {
sa_family_t family;
union {
#if defined(CONFIG_NET_IPV6)
struct in6_addr in6_addr;
#endif
#if defined(CONFIG_NET_IPV4)
struct in_addr in_addr;
#endif
};
};
#define IN6ADDR_ANY_INIT { { { 0, 0, 0, 0, 0, 0, 0, 0, 0, \
0, 0, 0, 0, 0, 0, 0 } } }
#define IN6ADDR_LOOPBACK_INIT { { { 0, 0, 0, 0, 0, 0, 0, \
0, 0, 0, 0, 0, 0, 0, 0, 1 } } }
#define INET6_ADDRSTRLEN 46
#define NET_IPV6_ADDR_LEN sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx")
#define NET_IPV4_ADDR_LEN sizeof("xxx.xxx.xxx.xxx")
#define INADDR_ANY 0
#define NET_IPV6_MTU 1280
/** IPv6 extension headers types */
#define NET_IPV6_NEXTHDR_HBHO 0
#define NET_IPV6_NEXTHDR_DESTO 60
#define NET_IPV6_NEXTHDR_ROUTING 43
#define NET_IPV6_NEXTHDR_FRAG 44
#define NET_IPV6_NEXTHDR_NONE 59
/** IPv6/IPv4 network connection tuple */
struct net_tuple {
/** IPv6/IPv4 remote address */
struct net_addr *remote_addr;
/** IPv6/IPv4 local address */
struct net_addr *local_addr;
/** UDP/TCP remote port */
uint16_t remote_port;
/** UDP/TCP local port */
uint16_t local_port;
/** IP protocol */
enum net_ip_protocol ip_proto;
};
/** How the network address is assigned to network interface */
enum net_addr_type {
NET_ADDR_ANY = 0,
NET_ADDR_AUTOCONF,
NET_ADDR_DHCP,
NET_ADDR_MANUAL,
};
#if NET_DEBUG > 0
static inline char *net_addr_type2str(enum net_addr_type type)
{
switch (type) {
case NET_ADDR_AUTOCONF:
return "AUTO";
case NET_ADDR_DHCP:
return "DHCP";
case NET_ADDR_MANUAL:
return "MANUAL";
case NET_ADDR_ANY:
default:
break;
}
return "<unknown>";
}
#else
static inline char *net_addr_type2str(enum net_addr_type type)
{
return NULL;
}
#endif
/** What is the current state of the network address */
enum net_addr_state {
NET_ADDR_ANY_STATE = -1,
NET_ADDR_TENTATIVE = 0,
NET_ADDR_PREFERRED,
NET_ADDR_DEPRECATED,
};
struct net_ipv6_hdr {
uint8_t vtc;
uint8_t tcflow;
uint16_t flow;
uint8_t len[2];
uint8_t nexthdr;
uint8_t hop_limit;
struct in6_addr src;
struct in6_addr dst;
} __packed;
struct net_ipv4_hdr {
uint8_t vhl;
uint8_t tos;
uint8_t len[2];
uint8_t id[2];
uint8_t offset[2];
uint8_t ttl;
uint8_t proto;
uint16_t chksum;
struct in_addr src;
struct in_addr dst;
} __packed;
struct net_icmp_hdr {
uint8_t type;
uint8_t code;
uint16_t chksum;
} __packed;
struct net_udp_hdr {
uint16_t src_port;
uint16_t dst_port;
uint16_t len;
uint16_t chksum;
} __packed;
struct net_tcp_hdr {
uint16_t src_port;
uint16_t dst_port;
uint8_t seq[4];
uint8_t ack[4];
uint8_t offset;
uint8_t flags;
uint8_t wnd[2];
uint16_t chksum;
uint8_t urg[2];
uint8_t optdata[0];
} __packed;
#define NET_UDPH_LEN 8 /* Size of UDP header */
#define NET_TCPH_LEN 20 /* Size of TCP header */
#define NET_ICMPH_LEN 4 /* Size of ICMP header */
#define NET_IPV6H_LEN 40 /* Size of IPv6 header */
#define NET_ICMPV6H_LEN NET_ICMPH_LEN /* Size of ICMPv6 header */
#define NET_IPV6UDPH_LEN (NET_UDPH_LEN + NET_IPV6H_LEN) /* IPv6 + UDP */
#define NET_IPV6TCPH_LEN (NET_TCPH_LEN + NET_IPV6H_LEN) /* IPv6 + TCP */
#define NET_IPV6ICMPH_LEN (NET_IPV6H_LEN + NET_ICMPH_LEN) /* ICMPv6 + IPv6 */
#define NET_IPV6_FRAGH_LEN 8
#define NET_IPV4H_LEN 20 /* Size of IPv4 header */
#define NET_ICMPV4H_LEN NET_ICMPH_LEN /* Size of ICMPv4 header */
#define NET_IPV4UDPH_LEN (NET_UDPH_LEN + NET_IPV4H_LEN) /* IPv4 + UDP */
#define NET_IPV4TCPH_LEN (NET_TCPH_LEN + NET_IPV4H_LEN) /* IPv4 + TCP */
#define NET_IPV4ICMPH_LEN (NET_IPV4H_LEN + NET_ICMPH_LEN) /* ICMPv4 + IPv4 */
/**
* @brief Check if the IPv6 address is a loopback address (::1).
*
* @param addr IPv6 address
*
* @return True if address is a loopback address, False otherwise.
*/
static inline bool net_is_ipv6_addr_loopback(struct in6_addr *addr)
{
return addr->s6_addr32[0] == 0 &&
addr->s6_addr32[1] == 0 &&
addr->s6_addr32[2] == 0 &&
ntohl(addr->s6_addr32[3]) == 1;
}
/**
* @brief Check if the IPv6 address is a multicast address.
*
* @param addr IPv6 address
*
* @return True if address is multicast address, False otherwise.
*/
static inline bool net_is_ipv6_addr_mcast(const struct in6_addr *addr)
{
return addr->s6_addr[0] == 0xFF;
}
struct net_if;
extern struct net_if_addr *net_if_ipv6_addr_lookup(const struct in6_addr *addr,
struct net_if **iface);
/**
* @brief Check if IPv6 address is found in one of the network interfaces.
*
* @param addr IPv6 address
*
* @return True if address was found, False otherwise.
*/
static inline bool net_is_my_ipv6_addr(struct in6_addr *addr)
{
return net_if_ipv6_addr_lookup(addr, NULL) != NULL;
}
extern struct net_if_mcast_addr *net_if_ipv6_maddr_lookup(const struct in6_addr *addr,
struct net_if **iface);
/**
* @brief Check if IPv6 multicast address is found in one of the
* network interfaces.
*
* @param maddr Multicast IPv6 address
*
* @return True if address was found, False otherwise.
*/
static inline bool net_is_my_ipv6_maddr(struct in6_addr *maddr)
{
return net_if_ipv6_maddr_lookup(maddr, NULL) != NULL;
}
/**
* @brief Check if two IPv6 addresses are same when compared after prefix mask.
*
* @param addr1 First IPv6 address.
* @param addr2 Second IPv6 address.
* @param length Prefix length (max length is 128).
*
* @return True if addresses are the same, False otherwise.
*/
static inline bool net_is_ipv6_prefix(const uint8_t *addr1,
const uint8_t *addr2,
uint8_t length)
{
uint8_t bits = 128 - length;
uint8_t bytes = bits / 8;
uint8_t remain = bits % 8;
if (length > 128) {
return false;
}
if (memcmp(addr1, addr2, 16 - bytes)) {
return false;
}
return ((addr1[16 - bytes] & ((8 - remain) << 8))
==
(addr2[16 - bytes] & ((8 - remain) << 8)));
}
/**
* @brief Check if the IPv4 address is a loopback address (127.0.0.0/8).
*
* @param addr IPv4 address
*
* @return True if address is a loopback address, False otherwise.
*/
static inline bool net_is_ipv4_addr_loopback(struct in_addr *addr)
{
return addr->s4_addr[0] == 127;
}
/**
* @brief Check if the IPv4 address is unspecified (all bits zero)
*
* @param addr IPv4 address.
*
* @return True if the address is unspecified, false otherwise.
*/
static inline bool net_is_ipv4_addr_unspecified(const struct in_addr *addr)
{
return addr->s_addr[0] == 0;
}
/**
* @brief Check if the IPv4 address is a multicast address.
*
* @param addr IPv4 address
*
* @return True if address is multicast address, False otherwise.
*/
static inline bool net_is_ipv4_addr_mcast(const struct in_addr *addr)
{
return (addr->s_addr[0] & 0xE0000000) == 0xE0000000;
}
extern struct net_if_addr *net_if_ipv4_addr_lookup(const struct in_addr *addr,
struct net_if **iface);
/**
* @brief Check if the IPv4 address is assigned to any network interface
* in the system.
*
* @param addr A valid pointer on an IPv4 address
*
* @return True if IPv4 address is found in one of the network interfaces,
* False otherwise.
*/
static inline bool net_is_my_ipv4_addr(const struct in_addr *addr)
{
return net_if_ipv4_addr_lookup(addr, NULL) != NULL;
}
/**
* @def net_ipaddr_copy
* @brief Copy an IPv4 or IPv6 address
*
* @param dest Destination IP address.
* @param src Source IP address.
*
* @return Destination address.
*/
#define net_ipaddr_copy(dest, src) \
UNALIGNED_PUT(UNALIGNED_GET(src), dest)
/**
* @brief Compare two IPv4 addresses
*
* @param addr1 Pointer to IPv4 address.
* @param addr2 Pointer to IPv4 address.
*
* @return True if the addresses are the same, false otherwise.
*/
static inline bool net_ipv4_addr_cmp(const struct in_addr *addr1,
const struct in_addr *addr2)
{
return addr1->s_addr[0] == addr2->s_addr[0];
}
/**
* @brief Compare two IPv6 addresses
*
* @param addr1 Pointer to IPv6 address.
* @param addr2 Pointer to IPv6 address.
*
* @return True if the addresses are the same, false otherwise.
*/
static inline bool net_ipv6_addr_cmp(const struct in6_addr *addr1,
const struct in6_addr *addr2)
{
return !memcmp(addr1, addr2, sizeof(struct in6_addr));
}
/**
* @brief Check if the given IPv6 address is a link local address.
*
* @param addr A valid pointer on an IPv6 address
*
* @return True if it is, false otherwise.
*/
static inline bool net_is_ipv6_ll_addr(const struct in6_addr *addr)
{
return ((addr->s6_addr[0]) == 0xFE) &&
((addr->s6_addr[1]) == 0x80);
}
/**
* @brief Return pointer to any (all bits zeros) IPv6 address.
*
* @return Any IPv6 address.
*/
const struct in6_addr *net_ipv6_unspecified_address(void);
/**
* @brief Return pointer to any (all bits zeros) IPv4 address.
*
* @return Any IPv4 address.
*/
const struct in_addr *net_ipv4_unspecified_address(void);
/**
* @brief Return pointer to broadcast (all bits ones) IPv4 address.
*
* @return Broadcast IPv4 address.
*/
const struct in_addr *net_ipv4_broadcast_address(void);
struct net_if;
extern bool net_if_ipv4_addr_mask_cmp(struct net_if *iface,
struct in_addr *addr);
/**
* @brief Check if the given address belongs to same subnet that
* has been configured for the interface.
*
* @param iface A valid pointer on an interface
* @param addr pointer on an address
*
* @return True if address is in same subnet, false otherwise.
*/
static inline bool net_ipv4_addr_mask_cmp(struct net_if *iface,
struct in_addr *addr)
{
return net_if_ipv4_addr_mask_cmp(iface, addr);
}
/**
* @brief Check if the IPv6 address is unspecified (all bits zero)
*
* @param addr IPv6 address.
*
* @return True if the address is unspecified, false otherwise.
*/
static inline bool net_is_ipv6_addr_unspecified(const struct in6_addr *addr)
{
return addr->s6_addr32[0] == 0 && addr->s6_addr32[1] == 0 &&
addr->s6_addr32[2] == 0 && addr->s6_addr32[3] == 0;
}
/**
* @brief Check if the IPv6 address is solicited node multicast address
* FF02:0:0:0:0:1:FFXX:XXXX defined in RFC 3513
*
* @param addr IPv6 address.
*
* @return True if the address is solicited node address, false otherwise.
*/
static inline bool net_is_ipv6_addr_solicited_node(const struct in6_addr *addr)
{
return addr->s6_addr32[0] == htonl(0xff020000) &&
addr->s6_addr32[1] == 0x00000000 &&
addr->s6_addr32[2] == htonl(0x00000001) &&
((addr->s6_addr32[3] & htonl(0xff000000)) == htonl(0xff000000));
}
/**
* @brief Check if the IPv6 address is a global multicast address (FFxE::/16).
*
* @param addr IPv6 address.
*
* @return True if the address is global multicast address, false otherwise.
*/
static inline bool net_is_ipv6_addr_mcast_global(const struct in6_addr *addr)
{
return addr->s6_addr[0] == 0xff &&
(addr->s6_addr[1] & 0x0e) == 0x0e;
}
/**
* @brief Create solicited node IPv6 multicast address
* FF02:0:0:0:0:1:FFXX:XXXX defined in RFC 3513
*
* @param src IPv6 address.
* @param dst IPv6 address.
*/
static inline void net_ipv6_addr_create_solicited_node(struct in6_addr *src,
struct in6_addr *dst)
{
dst->s6_addr[0] = 0xFF;
dst->s6_addr[1] = 0x02;
dst->s6_addr16[1] = 0;
dst->s6_addr16[2] = 0;
dst->s6_addr16[3] = 0;
dst->s6_addr16[4] = 0;
dst->s6_addr[10] = 0;
dst->s6_addr[11] = 0x01;
dst->s6_addr[12] = 0xFF;
dst->s6_addr[13] = src->s6_addr[13];
dst->s6_addr16[7] = src->s6_addr16[7];
}
/** @brief Construct an IPv6 address from eight 16-bit words.
*
* @param addr IPv6 address
* @param addr0 16-bit word which is part of the address
* @param addr1 16-bit word which is part of the address
* @param addr2 16-bit word which is part of the address
* @param addr3 16-bit word which is part of the address
* @param addr4 16-bit word which is part of the address
* @param addr5 16-bit word which is part of the address
* @param addr6 16-bit word which is part of the address
* @param addr7 16-bit word which is part of the address
*/
static inline void net_ipv6_addr_create(struct in6_addr *addr,
uint16_t addr0, uint16_t addr1,
uint16_t addr2, uint16_t addr3,
uint16_t addr4, uint16_t addr5,
uint16_t addr6, uint16_t addr7)
{
addr->s6_addr16[0] = htons(addr0);
addr->s6_addr16[1] = htons(addr1);
addr->s6_addr16[2] = htons(addr2);
addr->s6_addr16[3] = htons(addr3);
addr->s6_addr16[4] = htons(addr4);
addr->s6_addr16[5] = htons(addr5);
addr->s6_addr16[6] = htons(addr6);
addr->s6_addr16[7] = htons(addr7);
}
/**
* @brief Create link local allnodes multicast IPv6 address
*
* @param addr IPv6 address
*/
static inline void net_ipv6_addr_create_ll_allnodes_mcast(struct in6_addr *addr)
{
net_ipv6_addr_create(addr, 0xff02, 0, 0, 0, 0, 0, 0, 0x0001);
}
/**
* @brief Create IPv6 address interface identifier
*
* @param addr IPv6 address
* @param lladdr Link local address
*/
static inline void net_ipv6_addr_create_iid(struct in6_addr *addr,
struct net_linkaddr *lladdr)
{
addr->s6_addr[0] = 0xfe;
addr->s6_addr[1] = 0x80;
addr->s6_addr16[1] = 0;
addr->s6_addr32[1] = 0;
switch (lladdr->len) {
case 2:
addr->s6_addr32[2] = 0;
addr->s6_addr[11] = 0xff;
addr->s6_addr[12] = 0xfe;
addr->s6_addr[13] = 0;
addr->s6_addr[14] = lladdr->addr[0];
addr->s6_addr[15] = lladdr->addr[1];
addr->s6_addr[8] ^= 0x02;
break;
case 6:
memcpy(&addr->s6_addr[8], lladdr->addr, 3);
addr->s6_addr[11] = 0xff;
addr->s6_addr[12] = 0xfe;
memcpy(&addr->s6_addr[13], lladdr->addr + 3, 3);
addr->s6_addr[8] ^= 0x02;
break;
case 8:
memcpy(&addr->s6_addr[8], lladdr->addr, lladdr->len);
addr->s6_addr[8] ^= 0x02;
break;
}
}
/**
* @brief Check if given address is based on link layer address
*
* @return True if it is, False otherwise
*/
static inline bool net_ipv6_addr_based_on_ll(const struct in6_addr *addr,
const struct net_linkaddr *lladdr)
{
switch (lladdr->len) {
case 2:
if (!memcmp(&addr->s6_addr[14], lladdr->addr, lladdr->len) &&
(addr->s6_addr[8] ^ 0x02) == lladdr->addr[0] &&
addr->s6_addr[11] == 0xff &&
addr->s6_addr[12] == 0xfe) {
return true;
}
break;
case 6:
if (!memcmp(&addr->s6_addr[9], &lladdr->addr[1], 2) &&
!memcmp(&addr->s6_addr[13], &lladdr->addr[3], 3) &&
addr->s6_addr[11] == 0xff &&
addr->s6_addr[12] == 0xfe &&
(addr->s6_addr[8] ^ 0x02) == lladdr->addr[0]) {
return true;
}
break;
case 8:
if (!memcmp(&addr->s6_addr[9], &lladdr->addr[1],
lladdr->len - 1) &&
(addr->s6_addr[8] ^ 0x02) == lladdr->addr[0]) {
return true;
}
break;
}
return false;
}
/**
* @brief Get sockaddr_in6 from sockaddr. This is a helper so that
* the code calling this function can be made shorter.
*
* @param addr Socket address
*
* @return Pointer to IPv6 socket address
*/
static inline struct sockaddr_in6 *net_sin6(const struct sockaddr *addr)
{
return (struct sockaddr_in6 *)addr;
}
/**
* @brief Get sockaddr_in from sockaddr. This is a helper so that
* the code calling this function can be made shorter.
*
* @param addr Socket address
*
* @return Pointer to IPv4 socket address
*/
static inline struct sockaddr_in *net_sin(const struct sockaddr *addr)
{
return (struct sockaddr_in *)addr;
}
/**
* @brief Get sockaddr_in6_ptr from sockaddr_ptr. This is a helper so that
* the code calling this function can be made shorter.
*
* @param addr Socket address
*
* @return Pointer to IPv6 socket address
*/
static inline
struct sockaddr_in6_ptr *net_sin6_ptr(const struct sockaddr_ptr *addr)
{
return (struct sockaddr_in6_ptr *)addr;
}
/**
* @brief Get sockaddr_in_ptr from sockaddr_ptr. This is a helper so that
* the code calling this function can be made shorter.
*
* @param addr Socket address
*
* @return Pointer to IPv4 socket address
*/
static inline
struct sockaddr_in_ptr *net_sin_ptr(const struct sockaddr_ptr *addr)
{
return (struct sockaddr_in_ptr *)addr;
}
/**
* @brief Convert a string to IP address.
*
* @param family IP address family (AF_INET or AF_INET6)
* @param src IP address in a null terminated string
* @param dst Pointer to struct in_addr if family is AF_INET or
* pointer to struct in6_addr if family is AF_INET6
*
* @note This function doesn't do precise error checking,
* do not use for untrusted strings.
*
* @return 0 if ok, < 0 if error
*/
int net_addr_pton(sa_family_t family, const char *src,
struct sockaddr *dst);
#ifdef __cplusplus
}
#endif
#endif /* __NET_IP_H */
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