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incubator-nuttx/include/netinet/in.h

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/****************************************************************************
* include/netinet/in.h
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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 __INCLUDE_NETINET_IN_H
#define __INCLUDE_NETINET_IN_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdint.h>
#include <endian.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Values for protocol argument to socket() */
#define IPPROTO_IP 0 /* Default protocol */
#define IPPROTO_HOPOPTS 0 /* IPv6 Hop-by-Hop options. */
#define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
#define IPPROTO_IGMP 2 /* Internet Group Management Protocol */
#define IPPROTO_IPIP 4 /* IPIP tunnels (older KA9Q tunnels use 94) */
#define IPPROTO_TCP 6 /* Transmission Control Protocol */
#define IPPROTO_EGP 8 /* Exterior Gateway Protocol */
#define IPPROTO_PUP 12 /* PUP protocol */
#define IPPROTO_UDP 17 /* User Datagram Protocol */
#define IPPROTO_IDP 22 /* XNS IDP protocol */
#define IPPROTO_TP 29 /* SO Transport Protocol Class 4. */
#define IPPROTO_DCCP 33 /* Datagram Congestion Control Protocol */
#define IPPROTO_IPV6 41 /* IPv6-in-IPv4 tunnelling */
#define IPPROTO_ROUTING 43 /* IPv6 routing header. */
#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header. */
#define IPPROTO_RSVP 46 /* Reservation Protocol. */
#define IPPROTO_GRE 47 /* General Routing Encapsulation. */
#define IPPROTO_ESP 50 /* Encapsulation Security Payload protocol */
#define IPPROTO_AH 51 /* Authentication Header protocol */
#define IPPROTO_ICMP6 58 /* Internal Control Message Protocol v6 */
#define IPPROTO_ICMPV6 IPPROTO_ICMP6
#define IPPROTO_NONE 59 /* IPv6 no next header. */
#define IPPROTO_DSTOPTS 60 /* IPv6 destination options. */
#define IPPROTO_MTP 92 /* Multicast Transport Protocol. */
#define IPPROTO_ENCAP 98 /* Encapsulation Header. */
#define IPPROTO_BEETPH 94 /* IP option pseudo header for BEET */
#define IPPROTO_PIM 103 /* Protocol Independent Multicast */
#define IPPROTO_COMP 108 /* Compression Header protocol */
#define IPPROTO_SCTP 132 /* Stream Control Transport Protocol */
#define IPPROTO_UDPLITE 136 /* UDP-Lite (RFC 3828) */
#define IPPROTO_MPLS 137 /* MPLS in IP (RFC 4023) */
#define IPPROTO_RAW 255 /* Raw IP packets */
/* SOL_IP protocol-level socket options. */
#define IP_MULTICAST_IF (__SO_PROTOCOL + 1) /* Set local device for a
* multicast socket */
#define IP_MULTICAST_TTL (__SO_PROTOCOL + 2) /* Set/read the time-to-
* live value of outgoing
* multicast packets */
#define IP_MULTICAST_LOOP (__SO_PROTOCOL + 3) /* Set/read boolean that
* determines whether sent
* multicast packets should
* be looped back to local
* sockets. */
#define IP_ADD_MEMBERSHIP (__SO_PROTOCOL + 4) /* Join a multicast group */
#define IP_DROP_MEMBERSHIP (__SO_PROTOCOL + 5) /* Leave a multicast group */
#define IP_UNBLOCK_SOURCE (__SO_PROTOCOL + 6) /* Unblock previously
* blocked multicast source */
#define IP_BLOCK_SOURCE (__SO_PROTOCOL + 7) /* Stop receiving multicast
* data from source */
#define IP_ADD_SOURCE_MEMBERSHIP (__SO_PROTOCOL + 8) /* Join a multicast group;
* allow receive only from
* source */
#define IP_DROP_SOURCE_MEMBERSHIP (__SO_PROTOCOL + 9) /* Leave a source-specific
* group. Stop receiving
* data from a given
* multicast group that come
* from a given source */
#define IP_MSFILTER (__SO_PROTOCOL + 10) /* Access advanced, full-
* state filtering API */
#define IP_MULTICAST_ALL (__SO_PROTOCOL + 11) /* Modify the delivery policy
* of multicast messages bound
* to INADDR_ANY */
#define IP_PKTINFO (__SO_PROTOCOL + 12) /* Get some information about
* the incoming packet */
#define IP_TOS (__SO_PROTOCOL + 13) /* Access the Type-Of-Service
* (TOS) field */
#define IP_TTL (__SO_PROTOCOL + 14) /* The IP TTL (time to live)
* of IP packets sent by the
* network stack */
/* SOL_IPV6 protocol-level socket options. */
#define IPV6_JOIN_GROUP (__SO_PROTOCOL + 1) /* Join a multicast group */
#define IPV6_LEAVE_GROUP (__SO_PROTOCOL + 2) /* Quit a multicast group */
#define IPV6_MULTICAST_HOPS (__SO_PROTOCOL + 3) /* Multicast hop limit */
#define IPV6_MULTICAST_IF (__SO_PROTOCOL + 4) /* Interface to use for
* outgoing multicast packets */
#define IPV6_MULTICAST_LOOP (__SO_PROTOCOL + 5) /* Multicast packets are
* delivered back to the local
* application */
#define IPV6_UNICAST_HOPS (__SO_PROTOCOL + 6) /* Unicast hop limit */
#define IPV6_V6ONLY (__SO_PROTOCOL + 7) /* Restrict AF_INET6 socket
* to IPv6 communications only */
#define IPV6_PKTINFO (__SO_PROTOCOL + 8) /* Information about the
* incoming packet */
#define IPV6_RECVPKTINFO (__SO_PROTOCOL + 9) /* Receive the information about
* the incoming packet */
#define IPV6_TCLASS (__SO_PROTOCOL + 10) /* Access the Traffic Class
* field */
#define IPV6_RECVHOPLIMIT (__SO_PROTOCOL + 11) /* Access the hop limit field */
#define IPV6_HOPLIMIT (__SO_PROTOCOL + 12) /* Hop limit */
/* Values used with SIOCSIFMCFILTER and SIOCGIFMCFILTER ioctl's */
#define MCAST_EXCLUDE 0
#define MCAST_INCLUDE 1
/* Definitions of the bits in an Internet address integer.
* On subnets, host and network parts are found according to
* the subnet mask, not these masks.
*/
#define IN_CLASSA(a) ((((in_addr_t)(a)) & 0x80000000) == 0)
#define IN_CLASSA_NET 0xff000000
#define IN_CLASSA_NSHIFT 24
#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
#define IN_CLASSA_MAX 128
#define IN_CLASSB(a) ((((in_addr_t)(a)) & 0xc0000000) == 0x80000000)
#define IN_CLASSB_NET 0xffff0000
#define IN_CLASSB_NSHIFT 16
#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
#define IN_CLASSB_MAX 65536
#define IN_CLASSC(a) ((((in_addr_t)(a)) & 0xe0000000) == 0xc0000000)
#define IN_CLASSC_NET 0xffffff00
#define IN_CLASSC_NSHIFT 8
#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
/* Test if an IPv4 address is a multicast address */
#define IN_CLASSD(i) (((in_addr_t)(i) & 0xf0000000) == 0xe0000000)
#define IN_MULTICAST(i) IN_CLASSD(i)
/* Special values of in_addr_t */
#define INADDR_ANY ((in_addr_t)0x00000000) /* Address to accept any
* incoming messages */
#define INADDR_BROADCAST ((in_addr_t)0xffffffff) /* Address to send to
* all hosts */
#define INADDR_NONE ((in_addr_t)0xffffffff) /* Address indicating an
* error return */
#define INADDR_LOOPBACK ((in_addr_t)0x7f000001) /* Inet 127.0.0.1. */
/* Special initializer for in6_addr_t */
#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}}}
/* Sizes of addresses (per OpenGroup.org) */
#define INET_ADDRSTRLEN 16 /* nnn.nnn.nnn.nnn */
#define INET6_ADDRSTRLEN 46 /* xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx */
/* struct in6_addr union selectors */
#define s6_addr in6_u.u6_addr8
#define s6_addr16 in6_u.u6_addr16
#define s6_addr32 in6_u.u6_addr32
/* Checks for special IPv6 addresses */
#define IN6_IS_ADDR_MULTICAST(a) \
((a)->s6_addr[0] == 0xff)
#define IN6_IS_ADDR_LINKLOCAL(a) \
((a)->s6_addr16[0] & HTONS(0xffc0) == HTONS(0xfe80))
#define IN6_IS_ADDR_LOOPBACK(a) \
((a)->s6_addr32[0] == 0 && \
(a)->s6_addr32[1] == 0 && \
(a)->s6_addr32[2] == 0 && \
(a)->s6_addr32[3] == HTONL(1))
#define IN6_IS_ADDR_UNSPECIFIED(a) \
((a)->s6_addr32[0] == 0 && \
(a)->s6_addr32[1] == 0 && \
(a)->s6_addr32[2] == 0 && \
(a)->s6_addr32[3] == 0)
#define IN6_IS_ADDR_V4COMPAT(a) \
((a)->s6_addr32[0] == 0 && \
(a)->s6_addr32[1] == 0 && \
(a)->s6_addr32[2] == 0 && \
(a)->s6_addr32[3] != 0 && \
(a)->s6_addr32[3] != NTOHL(1))
#define IN6_IS_ADDR_V4MAPPED(a) \
((a)->s6_addr32[0] == 0 && \
(a)->s6_addr32[1] == 0 && \
(a)->s6_addr32[2] == HTONL(0xffff))
#define IN6_IS_ADDR_MC_LINKLOCAL(a) \
(IN6_IS_ADDR_MULTICAST(a) && ((a)->s6_addr[1] & 0xf) == 0x2)
#define IN6_IS_ADDR_SITELOCAL(a) \
(((a)->s6_addr16[0] & HTONS(0xffc0)) == HTONS(0xfec0))
/* This macro to convert a 16/32-bit constant values quantity from host byte
* order to network byte order. The 16-bit version of this macro is required
* for uIP:
*/
#define HTONS htobe16
#define HTONL htobe32
#define HTONQ htobe64
#define NTOHS be16toh
#define NTOHL be32toh
#define NTOHQ be64toh
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/* IPv4/IPv6 port number */
typedef uint16_t in_port_t;
/* IPv4 Internet address */
typedef uint32_t in_addr_t;
struct in_addr
{
in_addr_t s_addr; /* Address (network byte order) */
};
struct sockaddr_in
{
sa_family_t sin_family; /* Address family: AF_INET */
in_port_t sin_port; /* Port in network byte order */
struct in_addr sin_addr; /* Internet address */
uint8_t sin_zero[8];
};
/* Used with certain IPv4 socket options */
struct ip_mreq
{
struct in_addr imr_multiaddr; /* IPv4 multicast address of group */
struct in_addr imr_interface; /* Local IPv4 address of interface */
};
struct ip_mreqn
{
struct in_addr imr_multiaddr; /* IPv4 multicast address of group */
struct in_addr imr_interface; /* Local IPv4 address of interface */
unsigned int imr_ifindex; /* Local interface index */
};
struct ip_mreq_source
{
struct in_addr imr_multiaddr; /* IPv4 multicast group address */
struct in_addr imr_interface; /* IPv4 address of local interface */
struct in_addr imr_sourceaddr; /* IPv4 address of multicast source */
};
struct ip_msfilter
{
struct in_addr imsf_multiaddr; /* IPv4 multicast group address */
struct in_addr imsf_interface; /* IPv4 address of local interface */
uint32_t imsf_fmode; /* Filter mode */
uint32_t imsf_numsrc; /* Number of sources in the following array */
struct in_addr imsf_slist[1]; /* Array of source addresses */
};
struct in_pktinfo
{
int ipi_ifindex; /* Interface index */
struct in_addr ipi_spec_dst; /* Local address */
struct in_addr ipi_addr; /* Header Destination address */
};
/* IPv6 Internet address */
struct in6_addr
{
union
{
uint8_t u6_addr8[16];
uint16_t u6_addr16[8];
uint32_t u6_addr32[4];
} in6_u;
};
struct sockaddr_in6
{
sa_family_t sin6_family; /* Address family: AF_INET6 */
in_port_t sin6_port; /* Port in network byte order */
uint32_t sin6_flowinfo; /* IPv6 traffic class and flow information */
struct in6_addr sin6_addr; /* IPv6 Internet address */
uint32_t sin6_scope_id; /* Set of interfaces for a scope */
};
/* Used with certain IPv6 socket options */
struct ipv6_mreq
{
struct in6_addr ipv6mr_multiaddr; /* IPv6 multicast address of group */
unsigned int ipv6mr_interface; /* Local interface index */
};
struct in6_pktinfo
{
struct in6_addr ipi6_addr; /* src/dst IPv6 address */
int ipi6_ifindex; /* send/recv interface index */
};
struct in6_ifreq
{
struct in6_addr ifr6_addr; /* The IPv6 address of the request */
uint32_t ifr6_prefixlen; /* The IPv6 prefix length */
int ifr6_ifindex; /* The interface index of the request */
};
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/* Global IPv6 in6addr_any */
EXTERN const struct in6_addr in6addr_any;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* Functions to convert between host and network byte ordering.
*
* REVISIT: Since network order is defined as big-endian, the following
* functions are equivalent to functions declared in endian.h:
*
* htonl htobe32
* htons htobe16
* ntohl be32toh
* ntohs be16toh
*/
uint32_t ntohl(uint32_t nl);
uint16_t ntohs(uint16_t ns);
uint64_t ntohq(uint64_t nq);
uint32_t htonl(uint32_t hl);
uint16_t htons(uint16_t hs);
uint64_t htonq(uint64_t hq);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_NETINET_IN_H */
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