123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472 |
- /* 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
- } __packed;
- #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;
- } __packed;
- #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 } } }
- /*
- * All-routers multicast address is the link-local scope address to reach all
- * routers.
- */
- #define ALL_ROUTERS_MULT_ADDR { { { 0xFF, 0x02, 0x00, 0x00, \
- 0x00, 0x00, 0x00, 0x00, \
- 0x00, 0x00, 0x00, 0x00, \
- 0x00, 0x00, 0x00, 0x02 } } }
- #define IPV6_LINK_LOCAL_PREFIX 0xfe80
- #define IPV6_LINK_LOCAL_MASK 0xffb0 /* The first 10-bit of address mask. */
- /* 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
- } __packed;
- /*
- * struct icmp6_ra_prefix_info - Prefix Information option of the ICMPv6 message
- * The Prefix Information option provides hosts with on-link prefixes and
- * prefixes for Address Autoconfiguration. Refer to RFC 4861 for more info.
- */
- struct icmp6_ra_prefix_info {
- u8 type; /* Type is 3 for Prefix Information. */
- u8 len; /* Len is 4 for Prefix Information. */
- /* The number of leading bits in the Prefix that are valid. */
- u8 prefix_len;
- u8 reserved1:6, /* MUST be ignored by the receiver. */
- aac:1, /* autonomous address-configuration flag */
- /* Indicates that this prefix can be used for on-link determination. */
- on_link:1;
- /*
- * The length of time in seconds that the prefix is valid for the
- * purpose of on-link determination.
- */
- __be32 valid_lifetime;
- /* The length of time addresses remain preferred. */
- __be32 preferred_lifetime;
- __be32 reserved2; /* MUST be ignored by the receiver. */
- /*
- * Prefix is an IP address or a prefix of an IP address. The Prefix
- * Length field contains the number of valid leading bits in the prefix.
- * The bits in the prefix after the prefix length are reserved and MUST
- * be initialized to zero by the sender and ignored by the receiver.
- */
- struct in6_addr prefix;
- } __packed;
- 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 struct in6_addr net_ping_ip6; /* the ipv6 address to ping */
- extern bool use_ip6;
- #if IS_ENABLED(CONFIG_IPV6)
- /**
- * 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
- */
- int string_to_ip6(const char *s, size_t len, struct in6_addr *addr);
- /**
- * 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
- */
- int ip6_is_unspecified_addr(struct in6_addr *addr);
- /**
- * 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
- */
- int ip6_is_our_addr(struct in6_addr *addr);
- /**
- * 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
- */
- int ip6_addr_in_subnet(struct in6_addr *our_addr, struct in6_addr *neigh_addr,
- u32 prefix_length);
- /**
- * ip6_make_lladd() - rMake up IPv6 Link Local address
- *
- * @lladdr: formed IPv6 Link Local address
- * @enetaddr: MAC addr of a device
- */
- void ip6_make_lladdr(struct in6_addr *lladr, 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
- */
- 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
- */
- 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
- */
- unsigned int csum_partial(const unsigned char *buff, int len, unsigned int sum);
- /**
- * 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
- */
- unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
- struct in6_addr *daddr, u16 len,
- unsigned short proto, unsigned int csum);
- /**
- * 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
- */
- int ip6_add_hdr(uchar *xip, struct in6_addr *src, struct in6_addr *dest,
- int nextheader, int hoplimit, int payload_len);
- /**
- * 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
- */
- int net_send_udp_packet6(uchar *ether, struct in6_addr *dest, int dport,
- int sport, int len);
- /**
- * 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
- */
- int net_ip6_handler(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len);
- /**
- * 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)
- {
- memcpy((void *)to, from, sizeof(struct in6_addr));
- }
- #else
- static inline int
- string_to_ip6(const char *s, size_t len, struct in6_addr *addr)
- {
- return -EINVAL;
- }
- static inline int ip6_is_unspecified_addr(struct in6_addr *addr)
- {
- return -1;
- }
- static inline int ip6_is_our_addr(struct in6_addr *addr)
- {
- return -1;
- }
- static inline int
- ip6_addr_in_subnet(struct in6_addr *our_addr, struct in6_addr *neigh_addr,
- u32 prefix_length)
- {
- return -1;
- }
- static inline void
- ip6_make_lladdr(struct in6_addr *lladdr, unsigned char const enetaddr[6])
- {
- }
- static inline void
- ip6_make_snma(struct in6_addr *mcast_addr, struct in6_addr *ip6_addr)
- {
- }
- static inline void
- ip6_make_mult_ethdstaddr(unsigned char enetaddr[6],
- struct in6_addr *mcast_addr)
- {
- }
- static inline unsigned int
- csum_partial(const unsigned char *buff, int len, unsigned int sum)
- {
- return 0;
- }
- 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;
- }
- 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;
- }
- static inline int
- net_send_udp_packet6(uchar *ether, struct in6_addr *dest,
- int dport, int sport, int len)
- {
- return -1;
- }
- static inline int
- net_ip6_handler(struct ethernet_hdr *et, struct ip6_hdr *ip6,
- int len)
- {
- return -EINVAL;
- }
- static inline void net_copy_ip6(void *to, const void *from)
- {
- }
- #endif
- #if IS_ENABLED(CONFIG_CMD_PING6)
- /* Send ping requset */
- void ping6_start(void);
- /**
- * ping6_receive() - Handle reception of ICMPv6 echo request/reply
- *
- * @et: pointer to incoming patcket
- * @ip6: pointer to IPv6 protocol
- * @len: packet length
- * Return: 0 if success, -EINVAL in case of failure during reception
- */
- int ping6_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len);
- #else
- static inline void ping6_start(void)
- {
- }
- static inline
- int ping6_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len)
- {
- return -EINVAL;
- }
- #endif /* CONFIG_CMD_PING6 */
- #endif /* __NET6_H__ */
|