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/** @file
@brief ICMPv6 handler
This is not to be included by the application.
*/
/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef __ICMPV6_H
#define __ICMPV6_H
#include <zephyr/sys/slist.h>
#include <zephyr/types.h>
#include <zephyr/net/net_ip.h>
#include <zephyr/net/net_pkt.h>
struct net_icmpv6_ns_hdr {
uint32_t reserved;
uint8_t tgt[NET_IPV6_ADDR_SIZE];
} __packed;
struct net_icmpv6_nd_opt_hdr {
uint8_t type;
uint8_t len;
} __packed;
struct net_icmpv6_na_hdr {
uint8_t flags;
uint8_t reserved[3];
uint8_t tgt[NET_IPV6_ADDR_SIZE];
} __packed;
struct net_icmpv6_rs_hdr {
uint32_t reserved;
} __packed;
struct net_icmpv6_ra_hdr {
uint8_t cur_hop_limit;
uint8_t flags;
uint16_t router_lifetime;
uint32_t reachable_time;
uint32_t retrans_timer;
} __packed;
struct net_icmpv6_nd_opt_mtu {
uint16_t reserved;
uint32_t mtu;
} __packed;
struct net_icmpv6_nd_opt_prefix_info {
uint8_t prefix_len;
uint8_t flags;
uint32_t valid_lifetime;
uint32_t preferred_lifetime;
uint32_t reserved;
uint8_t prefix[NET_IPV6_ADDR_SIZE];
} __packed;
struct net_icmpv6_nd_opt_6co {
uint8_t context_len;
uint8_t flag; /*res:3,c:1,cid:4 */
uint16_t reserved;
uint16_t lifetime;
uint8_t prefix[NET_IPV6_ADDR_SIZE];
} __packed;
/* RFC 4191, ch. 2.3 */
struct net_icmpv6_nd_opt_route_info {
uint8_t prefix_len;
struct {
#ifdef CONFIG_LITTLE_ENDIAN
uint8_t reserved_2 :3;
uint8_t prf :2;
uint8_t reserved_1 :3;
#else
uint8_t reserved_1 :3;
uint8_t prf :2;
uint8_t reserved_2 :3;
#endif
} flags;
uint32_t route_lifetime;
/* Variable-length prefix field follows, can be 0, 8 or 16 bytes
* depending on the option length.
*/
} __packed;
struct net_icmpv6_nd_opt_rdnss {
uint16_t reserved;
uint32_t lifetime;
/* Variable-length DNS server address follows,
* depending on the option length.
*/
} __packed;
struct net_icmpv6_echo_req {
uint16_t identifier;
uint16_t sequence;
} __packed;
struct net_icmpv6_mld_query {
uint16_t max_response_code;
uint16_t reserved;
uint8_t mcast_address[NET_IPV6_ADDR_SIZE];
uint16_t flagg; /*S, QRV & QQIC */
uint16_t num_sources;
} __packed;
struct net_icmpv6_mld_mcast_record {
uint8_t record_type;
uint8_t aux_data_len;
uint16_t num_sources;
uint8_t mcast_address[NET_IPV6_ADDR_SIZE];
} __packed;
#define NET_ICMPV6_ND_O_FLAG(flag) ((flag) & 0x40)
#define NET_ICMPV6_ND_M_FLAG(flag) ((flag) & 0x80)
#define NET_ICMPV6_ND_OPT_SLLAO 1
#define NET_ICMPV6_ND_OPT_TLLAO 2
#define NET_ICMPV6_ND_OPT_PREFIX_INFO 3
#define NET_ICMPV6_ND_OPT_MTU 5
#define NET_ICMPV6_ND_OPT_ROUTE 24
#define NET_ICMPV6_ND_OPT_RDNSS 25
#define NET_ICMPV6_ND_OPT_DNSSL 31
#define NET_ICMPV6_ND_OPT_6CO 34
#define NET_ICMPV6_OPT_TYPE_OFFSET 0
#define NET_ICMPV6_OPT_LEN_OFFSET 1
#define NET_ICMPV6_OPT_DATA_OFFSET 2
#define NET_ICMPV6_NA_FLAG_ROUTER 0x80
#define NET_ICMPV6_NA_FLAG_SOLICITED 0x40
#define NET_ICMPV6_NA_FLAG_OVERRIDE 0x20
#define NET_ICMPV6_RA_FLAG_ONLINK 0x80
#define NET_ICMPV6_RA_FLAG_AUTONOMOUS 0x40
#define NET_ICMPV6_DST_UNREACH 1 /* Destination unreachable */
#define NET_ICMPV6_PACKET_TOO_BIG 2 /* Packet too big */
#define NET_ICMPV6_TIME_EXCEEDED 3 /* Time exceeded */
#define NET_ICMPV6_PARAM_PROBLEM 4 /* IPv6 header is bad */
#define NET_ICMPV6_MLD_QUERY 130 /* Multicast Listener Query */
#define NET_ICMPV6_RS 133 /* Router Solicitation */
#define NET_ICMPV6_RA 134 /* Router Advertisement */
#define NET_ICMPV6_NS 135 /* Neighbor Solicitation */
#define NET_ICMPV6_NA 136 /* Neighbor Advertisement */
#define NET_ICMPV6_MLDv2 143 /* Multicast Listener Report v2 */
/* Codes for ICMPv6 Destination Unreachable message */
#define NET_ICMPV6_DST_UNREACH_NO_ROUTE 0 /* No route to destination */
#define NET_ICMPV6_DST_UNREACH_ADMIN 1 /* Admin prohibited communication */
#define NET_ICMPV6_DST_UNREACH_SCOPE 2 /* Beyond scope of source address */
#define NET_ICMPV6_DST_UNREACH_NO_ADDR 3 /* Address unreachable */
#define NET_ICMPV6_DST_UNREACH_NO_PORT 4 /* Port unreachable */
#define NET_ICMPV6_DST_UNREACH_SRC_ADDR 5 /* Source address failed */
#define NET_ICMPV6_DST_UNREACH_REJ_ROUTE 6 /* Reject route to destination */
/* Codes for ICMPv6 Parameter Problem message */
#define NET_ICMPV6_PARAM_PROB_HEADER 0 /* Erroneous header field */
#define NET_ICMPV6_PARAM_PROB_NEXTHEADER 1 /* Unrecognized next header */
#define NET_ICMPV6_PARAM_PROB_OPTION 2 /* Unrecognized option */
/* ICMPv6 header has 4 unused bytes that must be zero, RFC 4443 ch 3.1 */
#define NET_ICMPV6_UNUSED_LEN 4
const char *net_icmpv6_type2str(int icmpv6_type);
/**
* @brief Send ICMPv6 error message.
* @param pkt Network packet that this error is related to.
* @param type Type of the error message.
* @param code Code of the type of the error message.
* @param param Optional parameter value for this error. Depending on type
* and code this gives extra information to the recipient. Set 0 if unsure
* what value to use.
* @return Return 0 if the sending succeed, <0 otherwise.
*/
int net_icmpv6_send_error(struct net_pkt *pkt, uint8_t type, uint8_t code,
uint32_t param);
#if defined(CONFIG_NET_NATIVE_IPV6)
enum net_verdict net_icmpv6_input(struct net_pkt *pkt,
struct net_ipv6_hdr *ip_hdr);
int net_icmpv6_create(struct net_pkt *pkt, uint8_t icmp_type, uint8_t icmp_code);
int net_icmpv6_finalize(struct net_pkt *pkt, bool force_chksum);
void net_icmpv6_init(void);
#else
#define net_icmpv6_init(...)
#endif
#endif /* __ICMPV6_H */