--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2013 Allied Telesis Labs NZ
+ * Chris Packham, <judge.packham@gmail.com>
+ *
+ * Copyright (C) 2022 YADRO
+ * Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
+ */
+
+#ifndef __NET6_H__
+#define __NET6_H__
+
+#include <net.h>
+#include <linux/ctype.h>
+
+/* struct in6_addr - 128 bits long IPv6 address */
+struct in6_addr {
+ union {
+ u8 u6_addr8[16];
+ __be16 u6_addr16[8];
+ __be32 u6_addr32[4];
+ } in6_u;
+
+#define s6_addr in6_u.u6_addr8
+#define s6_addr16 in6_u.u6_addr16
+#define s6_addr32 in6_u.u6_addr32
+};
+
+#define IN6ADDRSZ sizeof(struct in6_addr)
+#define INETHADDRSZ sizeof(net_ethaddr)
+
+#define PROT_IP6 0x86DD /* IPv6 protocol */
+#define PROT_ICMPV6 58 /* ICMPv6 protocol*/
+
+#define IPV6_ADDRSCOPE_INTF 0x01
+#define IPV6_ADDRSCOPE_LINK 0x02
+#define IPV6_ADDRSCOPE_AMDIN 0x04
+#define IPV6_ADDRSCOPE_SITE 0x05
+#define IPV6_ADDRSCOPE_ORG 0x08
+#define IPV6_ADDRSCOPE_GLOBAL 0x0E
+
+#define USE_IP6_CMD_PARAM "-ipv6"
+
+/**
+ * struct ipv6hdr - Internet Protocol V6 (IPv6) header.
+ *
+ * IPv6 packet header as defined in RFC 2460.
+ */
+struct ip6_hdr {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u8 priority:4,
+ version:4;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u8 version:4,
+ priority:4;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+ u8 flow_lbl[3];
+ __be16 payload_len;
+ u8 nexthdr;
+ u8 hop_limit;
+ struct in6_addr saddr;
+ struct in6_addr daddr;
+};
+#define IP6_HDR_SIZE (sizeof(struct ip6_hdr))
+
+/* struct udp_hdr - User Datagram Protocol header */
+struct udp_hdr {
+ u16 udp_src; /* UDP source port */
+ u16 udp_dst; /* UDP destination port */
+ u16 udp_len; /* Length of UDP packet */
+ u16 udp_xsum; /* Checksum */
+} __packed;
+
+/*
+ * Handy for static initialisations of struct in6_addr, atlhough the
+ * c99 '= { 0 }' idiom might work depending on you compiler.
+ */
+#define ZERO_IPV6_ADDR { { { 0x00, 0x00, 0x00, 0x00, \
+ 0x00, 0x00, 0x00, 0x00, \
+ 0x00, 0x00, 0x00, 0x00, \
+ 0x00, 0x00, 0x00, 0x00 } } }
+
+#define IPV6_LINK_LOCAL_PREFIX 0xfe80
+
+/* hop limit for neighbour discovery packets */
+#define IPV6_NDISC_HOPLIMIT 255
+#define NDISC_TIMEOUT 5000UL
+#define NDISC_TIMEOUT_COUNT 3
+
+/* struct icmp6hdr - Internet Control Message Protocol header for IPV6 */
+struct icmp6hdr {
+ u8 icmp6_type;
+#define IPV6_ICMP_ECHO_REQUEST 128
+#define IPV6_ICMP_ECHO_REPLY 129
+#define IPV6_NDISC_ROUTER_SOLICITATION 133
+#define IPV6_NDISC_ROUTER_ADVERTISEMENT 134
+#define IPV6_NDISC_NEIGHBOUR_SOLICITATION 135
+#define IPV6_NDISC_NEIGHBOUR_ADVERTISEMENT 136
+#define IPV6_NDISC_REDIRECT 137
+ u8 icmp6_code;
+ __be16 icmp6_cksum;
+
+ /* ICMPv6 data */
+ union {
+ __be32 un_data32[1];
+ __be16 un_data16[2];
+ u8 un_data8[4];
+
+ /* struct icmpv6_echo - echo request/reply message format */
+ struct icmpv6_echo {
+ __be16 identifier;
+ __be16 sequence;
+ } u_echo;
+
+ /* struct icmpv6_nd_advt - Neighbor Advertisement format */
+ struct icmpv6_nd_advt {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ __be32 reserved:5,
+ override:1,
+ solicited:1,
+ router:1,
+ reserved2:24;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ __be32 router:1,
+ solicited:1,
+ override:1,
+ reserved:29;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+ } u_nd_advt;
+
+ /* struct icmpv6_nd_ra - Router Advertisement format */
+ struct icmpv6_nd_ra {
+ u8 hop_limit;
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u8 reserved:6,
+ other:1,
+ managed:1;
+
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u8 managed:1,
+ other:1,
+ reserved:6;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+ __be16 rt_lifetime;
+ } u_nd_ra;
+ } icmp6_dataun;
+#define icmp6_identifier icmp6_dataun.u_echo.identifier
+#define icmp6_sequence icmp6_dataun.u_echo.sequence
+#define icmp6_pointer icmp6_dataun.un_data32[0]
+#define icmp6_mtu icmp6_dataun.un_data32[0]
+#define icmp6_unused icmp6_dataun.un_data32[0]
+#define icmp6_maxdelay icmp6_dataun.un_data16[0]
+#define icmp6_router icmp6_dataun.u_nd_advt.router
+#define icmp6_solicited icmp6_dataun.u_nd_advt.solicited
+#define icmp6_override icmp6_dataun.u_nd_advt.override
+#define icmp6_ndiscreserved icmp6_dataun.u_nd_advt.reserved
+#define icmp6_hop_limit icmp6_dataun.u_nd_ra.hop_limit
+#define icmp6_addrconf_managed icmp6_dataun.u_nd_ra.managed
+#define icmp6_addrconf_other icmp6_dataun.u_nd_ra.other
+#define icmp6_rt_lifetime icmp6_dataun.u_nd_ra.rt_lifetime
+};
+
+extern struct in6_addr const net_null_addr_ip6; /* NULL IPv6 address */
+extern struct in6_addr net_gateway6; /* Our gateways IPv6 address */
+extern struct in6_addr net_ip6; /* Our IPv6 addr (0 = unknown) */
+extern struct in6_addr net_link_local_ip6; /* Our link local IPv6 addr */
+extern u32 net_prefix_length; /* Our prefixlength (0 = unknown) */
+extern struct in6_addr net_server_ip6; /* Server IPv6 addr (0 = unknown) */
+extern bool use_ip6;
+
+/**
+ * string_to_ip6() - Convert IPv6 string addr to inner IPV6 addr format
+ *
+ * Examples of valid strings:
+ * 2001:db8::0:1234:1
+ * 2001:0db8:0000:0000:0000:0000:1234:0001
+ * ::1
+ * ::ffff:192.168.1.1
+ *
+ * Examples of invalid strings
+ * 2001:db8::0::0 (:: can only appear once)
+ * 2001:db8:192.168.1.1::1 (v4 part can only appear at the end)
+ * 192.168.1.1 (we don't implicity map v4)
+ *
+ * @s: IPv6 string addr format
+ * @len: IPv6 string addr length
+ * @addr: converted IPv6 addr
+ * Return: 0 if conversion successful, -EINVAL if fail
+ */
+static inline int
+string_to_ip6(const char *s, size_t len, struct in6_addr *addr)
+{
+ return -EINVAL;
+}
+
+/**
+ * ip6_is_unspecified_addr() - Check if IPv6 addr is not set i.e. is zero
+ *
+ * @addr: IPv6 addr
+ * Return: 0 if addr is not set, -1 if is set
+ */
+static inline int ip6_is_unspecified_addr(struct in6_addr *addr)
+{
+ return -1;
+}
+
+/**
+ * ip6_is_our_addr() - Check if IPv6 addr belongs to our host addr
+ *
+ * We have 2 addresses that we should respond to. A link local address and a
+ * global address. This returns true if the specified address matches either
+ * of these.
+ *
+ * @addr: addr to check
+ * Return: 0 if addr is our, -1 otherwise
+ */
+static inline int ip6_is_our_addr(struct in6_addr *addr)
+{
+ return -1;
+}
+
+/**
+ * ip6_addr_in_subnet() - Check if two IPv6 addresses are in the same subnet
+ *
+ * @our_addr: first IPv6 addr
+ * @neigh_addr: second IPv6 addr
+ * @prefix_length: network mask length
+ * Return: 0 if two addresses in the same subnet, -1 otherwise
+ */
+static inline int
+ip6_addr_in_subnet(struct in6_addr *our_addr, struct in6_addr *neigh_addr,
+ u32 prefix_length)
+{
+ return -1;
+}
+
+/**
+ * ip6_make_lladd() - rMake up IPv6 Link Local address
+ *
+ * @lladdr: formed IPv6 Link Local address
+ * @enetaddr: MAC addr of a device
+ */
+static inline void
+ip6_make_lladdr(struct in6_addr *lladdr, unsigned char const enetaddr[6])
+{
+}
+
+/**
+ * ip6_make_snma() - aMake up Solicited Node Multicast Address from IPv6 addr
+ *
+ * @mcast_addr: formed SNMA addr
+ * @ip6_addr: base IPv6 addr
+ */
+static inline void
+ip6_make_snma(struct in6_addr *mcast_addr, struct in6_addr *ip6_addr)
+{
+}
+
+/**
+ * ip6_make_mult_ethdstaddr() - Make up IPv6 multicast addr
+ *
+ * @enetaddr: MAC addr of a device
+ * @mcast_addr: formed IPv6 multicast addr
+ */
+static inline void
+ip6_make_mult_ethdstaddr(unsigned char enetaddr[6],
+ struct in6_addr *mcast_addr)
+{
+}
+
+/**
+ * csum_partial() - Compute an internet checksum
+ *
+ * @buff: buffer to be checksummed
+ * @len: length of buffer
+ * @sum: initial sum to be added in
+ * Return: internet checksum of the buffer
+ */
+static inline unsigned int
+csum_partial(const unsigned char *buff, int len, unsigned int sum)
+{
+ return 0;
+}
+
+/**
+ * csum_ipv6_magic() - Compute checksum of IPv6 "psuedo-header" per RFC2460 section 8.1
+ *
+ * @saddr: source IPv6 addr
+ * @daddr: destination IPv6 add
+ * @len: data length to be checksummed
+ * @proto: IPv6 above protocol code
+ * @csum: upper layer checksum
+ * Return: computed checksum
+ */
+static inline unsigned short
+csum_ipv6_magic(struct in6_addr *saddr,
+ struct in6_addr *daddr, u16 len,
+ unsigned short proto, unsigned int csum)
+{
+ return 0;
+}
+
+/**
+ * ip6_add_hdr() - Make up IPv6 header
+ *
+ * @xip: pointer to IPv6 header to be formed
+ * @src: source IPv6 addr
+ * @dest: destination IPv6 addr
+ * @nextheader: next header type
+ * @hoplimit: hop limit
+ * @payload_len: payload length
+ * Return: IPv6 header length
+ */
+static inline unsigned int
+ip6_add_hdr(uchar *xip, struct in6_addr *src, struct in6_addr *dest,
+ int nextheader, int hoplimit, int payload_len)
+{
+ return 0;
+}
+
+/**
+ * net_send_udp_packet6() - Make up UDP packet and send it
+ *
+ * @ether: destination MAC addr
+ * @dest: destination IPv6 addr
+ * @dport: destination port
+ * @sport: source port
+ * @len: UDP packet length
+ * Return: 0 if send successfully, -1 otherwise
+ */
+static inline int
+net_send_udp_packet6(uchar *ether, struct in6_addr *dest,
+ int dport, int sport, int len)
+{
+ return -1;
+}
+
+/**
+ * net_ip6_handler() - Handle IPv6 packet
+ *
+ * @et: pointer to the beginning of the packet
+ * @ip6: pointer to the beginning of IPv6 protocol
+ * @len: incoming packet len
+ * Return: 0 if handle packet successfully, -EINVAL in case of invalid protocol
+ */
+static inline int
+net_ip6_handler(struct ethernet_hdr *et, struct ip6_hdr *ip6,
+ int len)
+{
+ return -EINVAL;
+}
+
+/**
+ * net_copy_ip6() - Copy IPv6 addr
+ *
+ * @to: destination IPv6 addr
+ * @from: source IPv6 addr
+ */
+static inline void net_copy_ip6(void *to, const void *from)
+{
+}
+
+#endif /* __NET6_H__ */
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