179 lines
5.1 KiB
C
179 lines
5.1 KiB
C
/** @file
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@brief IPv6 data handler
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This is not to be included by the application.
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*/
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/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __IPV6_H
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#define __IPV6_H
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#include <stdint.h>
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#include <net/net_ip.h>
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#include <net/nbuf.h>
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#include <net/net_if.h>
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#include <net/net_context.h>
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#include "icmpv6.h"
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#define NET_IPV6_ND_HOP_LIMIT 255
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#define NET_IPV6_ND_INFINITE_LIFETIME 0xFFFFFFFF
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#define NET_IPV6_DEFAULT_PREFIX_LEN 64
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#define NET_MAX_RS_COUNT 3
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#if defined(CONFIG_NET_IPV6_DAD)
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int net_ipv6_start_dad(struct net_if *iface, struct net_if_addr *ifaddr);
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#endif
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int net_ipv6_send_ns(struct net_if *iface, struct net_buf *pending,
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struct in6_addr *src, struct in6_addr *dst,
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struct in6_addr *tgt, bool is_my_address);
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int net_ipv6_start_rs(struct net_if *iface);
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int net_ipv6_send_rs(struct net_if *iface);
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int net_ipv6_start_rs(struct net_if *iface);
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/**
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* @brief Create IPv6 packet in provided net_buf.
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*
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* @param buf Network buffer
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* @param reserve Link layer reserve
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* @param src Source IPv6 address
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* @param dst Destination IPv6 address
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* @param iface Network interface
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* @param next_header Protocol type of the next header after IPv6 header.
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*
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* @return Return network buffer that contains the IPv6 packet.
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*/
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struct net_buf *net_ipv6_create_raw(struct net_buf *buf,
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uint16_t reserve,
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const struct in6_addr *src,
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const struct in6_addr *dst,
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struct net_if *iface,
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uint8_t next_header);
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/**
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* @brief Create IPv6 packet in provided net_buf.
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*
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* @param context Network context for a connection
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* @param buf Network buffer
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* @param dst_addr Destination IPv6 address
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*
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* @return Return network buffer that contains the IPv6 packet.
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*/
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struct net_buf *net_ipv6_create(struct net_context *context,
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struct net_buf *buf,
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const struct in6_addr *dst_addr);
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/**
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* @brief Finalize IPv6 packet. It should be called right before
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* sending the packet and after all the data has been added into
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* the packet. This function will set the length of the
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* packet and calculate the higher protocol checksum if needed.
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*
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* @param buf Network buffer
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* @param next_header Protocol type of the next header after IPv6 header.
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*
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* @return Return network buffer that contains the IPv6 packet.
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*/
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struct net_buf *net_ipv6_finalize_raw(struct net_buf *buf,
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uint8_t next_header);
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/**
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* @brief Finalize IPv6 packet. It should be called right before
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* sending the packet and after all the data has been added into
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* the packet. This function will set the length of the
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* packet and calculate the higher protocol checksum if needed.
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*
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* @param context Network context for a connection
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* @param buf Network buffer
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*
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* @return Return network buffer that contains the IPv6 packet.
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*/
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struct net_buf *net_ipv6_finalize(struct net_context *context,
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struct net_buf *buf);
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#if defined(CONFIG_NET_IPV6_ND)
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/**
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* @brief Make sure the link layer address is set according to
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* destination address. If the ll address is not yet known, then
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* start neighbor discovery to find it out. If ND needs to be done
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* then the returned packet is the Neighbor Solicitation message
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* and the original message is sent after Neighbor Advertisement
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* message is received.
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*
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* @param buf Network buffer
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*
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* @return Return network buffer to be sent.
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*/
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struct net_buf *net_ipv6_prepare_for_send(struct net_buf *buf);
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/**
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* @brief Look for a neighbour from it's address on an iface
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*
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* @param iface A valid pointer on a network interface
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* @param addr The IPv6 address to match
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*
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* @return A valid pointer on a neighbour on success, NULL otherwise
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*/
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struct net_nbr *net_ipv6_nbr_lookup(struct net_if *iface,
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struct in6_addr *addr);
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/**
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* @brief Look for a neighbour from it's link local address index
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*
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* @param iface Network interface to match. If NULL, then use
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* whatever interface there is configured for the neighbor address.
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* @param idx Index of the link layer address in the address array
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*
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* @return A valid pointer on a neighbour on success, NULL otherwise
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*/
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struct in6_addr *net_ipv6_nbr_lookup_by_index(struct net_if *iface,
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uint8_t idx);
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#else /* CONFIG_NET_IPV6_ND */
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static inline struct net_buf *net_ipv6_prepare_for_send(struct net_buf *buf)
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{
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return buf;
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}
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static inline struct net_nbr *net_ipv6_nbr_lookup(struct net_if *iface,
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struct in6_addr *addr)
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{
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return NULL;
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}
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static inline
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struct in6_addr *net_ipv6_nbr_lookup_by_index(struct net_if *iface,
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uint8_t idx)
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{
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return NULL;
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}
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#endif
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#if defined(CONFIG_NET_IPV6)
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void net_ipv6_init(void);
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#else
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#define net_ipv6_init(...)
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#endif
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#endif /* __IPV6_H */
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