167 lines
4.8 KiB
C
167 lines
4.8 KiB
C
/** @file
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@brief ICMPv6 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 __ICMPV6_H
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#define __ICMPV6_H
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#include <misc/slist.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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struct net_icmpv6_ns_hdr {
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uint32_t reserved;
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struct in6_addr tgt;
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} __packed;
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struct net_icmpv6_nd_opt_hdr {
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uint8_t type;
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uint8_t len;
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} __packed;
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struct net_icmpv6_na_hdr {
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uint8_t flags;
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uint8_t reserved[3];
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struct in6_addr tgt;
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} __packed;
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struct net_icmpv6_rs_hdr {
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uint32_t reserved;
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} __packed;
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struct net_icmpv6_ra_hdr {
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uint8_t cur_hop_limit;
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uint8_t flags;
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uint16_t router_lifetime;
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uint32_t reachable_time;
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uint32_t retrans_timer;
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} __packed;
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struct net_icmpv6_nd_opt_mtu {
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uint8_t type;
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uint8_t len;
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uint16_t reserved;
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uint32_t mtu;
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} __packed;
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struct net_icmpv6_nd_opt_prefix_info {
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uint8_t type;
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uint8_t len;
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uint8_t prefix_len;
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uint8_t flags;
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uint32_t valid_lifetime;
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uint32_t preferred_lifetime;
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uint32_t reserved;
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struct in6_addr prefix;
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} __packed;
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#define NET_ICMPV6_NS_BUF(buf) \
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((struct net_icmpv6_ns_hdr *)(net_nbuf_icmp_data(buf) + \
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sizeof(struct net_icmp_hdr)))
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#define NET_ICMPV6_ND_OPT_HDR_BUF(buf) \
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((struct net_icmpv6_nd_opt_hdr *)(net_nbuf_icmp_data(buf) + \
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sizeof(struct net_icmp_hdr) + \
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net_nbuf_ext_opt_len(buf)))
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#define NET_ICMPV6_NA_BUF(buf) \
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((struct net_icmpv6_na_hdr *)(net_nbuf_icmp_data(buf) + \
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sizeof(struct net_icmp_hdr)))
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#define NET_ICMPV6_RS_BUF(buf) \
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((struct net_icmpv6_rs_hdr *)(net_nbuf_icmp_data(buf) + \
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sizeof(struct net_icmp_hdr)))
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#define NET_ICMPV6_RA_BUF(buf) \
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((struct net_icmpv6_ra_hdr *)(net_nbuf_icmp_data(buf) + \
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sizeof(struct net_icmp_hdr)))
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#define NET_ICMPV6_ND_O_FLAG(flag) ((flag) & 0x40)
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#define NET_ICMPV6_ND_M_FLAG(flag) ((flag) & 0x80)
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#define NET_ICMPV6_ND_OPT_SLLAO 1
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#define NET_ICMPV6_ND_OPT_TLLAO 2
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#define NET_ICMPV6_ND_OPT_PREFIX_INFO 3
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#define NET_ICMPV6_ND_OPT_MTU 5
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#define NET_ICMPV6_ND_OPT_RDNSS 25
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#define NET_ICMPV6_ND_OPT_DNSSL 31
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#define NET_ICMPV6_OPT_TYPE_OFFSET 0
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#define NET_ICMPV6_OPT_LEN_OFFSET 1
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#define NET_ICMPV6_OPT_DATA_OFFSET 2
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#define NET_ICMPV6_NA_FLAG_ROUTER 0x80
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#define NET_ICMPV6_NA_FLAG_SOLICITED 0x40
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#define NET_ICMPV6_NA_FLAG_OVERRIDE 0x20
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#define NET_ICMPV6_RA_FLAG_ONLINK 0x80
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#define NET_ICMPV6_RA_FLAG_AUTONOMOUS 0x40
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#define NET_ICMPV6_DST_UNREACH 1 /* Destination unreachable */
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#define NET_ICMPV6_ECHO_REQUEST 128
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#define NET_ICMPV6_ECHO_REPLY 129
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#define NET_ICMPV6_RS 133 /* Router Solicitation */
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#define NET_ICMPV6_RA 134 /* Router Advertisement */
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#define NET_ICMPV6_NS 135 /* Neighbor Solicitation */
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#define NET_ICMPV6_NA 136 /* Neighbor Advertisement */
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/* Codes for ICMPv6 Destination Unreachable message */
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#define NET_ICMPV6_DST_UNREACH_NO_ROUTE 0 /* No route to destination */
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#define NET_ICMPV6_DST_UNREACH_ADMIN 1 /* Admin prohibited communication */
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#define NET_ICMPV6_DST_UNREACH_SCOPE 2 /* Beoynd scope of source address */
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#define NET_ICMPV6_DST_UNREACH_NO_ADDR 3 /* Address unrechable */
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#define NET_ICMPV6_DST_UNREACH_NO_PORT 4 /* Port unreachable */
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#define NET_ICMPV6_DST_UNREACH_SRC_ADDR 5 /* Source address failed */
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#define NET_ICMPV6_DST_UNREACH_REJ_ROUTE 6 /* Reject route to destination */
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/* ICMPv6 header has 4 unused bytes that must be zero, RFC 4443 ch 3.1 */
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#define NET_ICMPV6_UNUSED_LEN 4
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typedef enum net_verdict (*icmpv6_callback_handler_t)(struct net_buf *buf);
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struct net_icmpv6_handler {
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sys_snode_t node;
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uint8_t type;
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uint8_t code;
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icmpv6_callback_handler_t handler;
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};
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/**
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* @brief Send ICMPv6 error message.
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* @param buf Network buffer that this error is related to.
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* @param type Type of the error message.
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* @param code Code of the type of the error message.
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* @return Return 0 if the sending succeed, <0 otherwise.
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*/
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int net_icmpv6_send_error(struct net_buf *buf, uint8_t type, uint8_t code);
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void net_icmpv6_register_handler(struct net_icmpv6_handler *handler);
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enum net_verdict net_icmpv6_input(struct net_buf *buf, uint16_t len,
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uint8_t type, uint8_t code);
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#if defined(CONFIG_NET_IPV6)
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void net_icmpv6_init(void);
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#else
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#define net_icmpv6_init(...)
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#endif
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#endif /* __ICMPV6_H */
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