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https://source.denx.de/u-boot/u-boot.git
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9bc80c0bc0
Commands "ping6" and "tftpboot ... -ipv6" did not work on ARM because machine code expects 4-byte alignment and some structures from net6.h are not aligned in memory. Fix by adding __packed, since it is already used in this file. Signed-off-by: Sergei Antonov <saproj@gmail.com> Reviewed-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
433 lines
11 KiB
C
433 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2013 Allied Telesis Labs NZ
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* Chris Packham, <judge.packham@gmail.com>
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*
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* Copyright (C) 2022 YADRO
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* Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
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*/
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#ifndef __NET6_H__
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#define __NET6_H__
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#include <net.h>
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#include <linux/ctype.h>
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/* struct in6_addr - 128 bits long IPv6 address */
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struct in6_addr {
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union {
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u8 u6_addr8[16];
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__be16 u6_addr16[8];
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__be32 u6_addr32[4];
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} in6_u;
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#define s6_addr in6_u.u6_addr8
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#define s6_addr16 in6_u.u6_addr16
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#define s6_addr32 in6_u.u6_addr32
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} __packed;
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#define IN6ADDRSZ sizeof(struct in6_addr)
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#define INETHADDRSZ sizeof(net_ethaddr)
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#define PROT_IP6 0x86DD /* IPv6 protocol */
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#define PROT_ICMPV6 58 /* ICMPv6 protocol*/
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#define IPV6_ADDRSCOPE_INTF 0x01
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#define IPV6_ADDRSCOPE_LINK 0x02
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#define IPV6_ADDRSCOPE_AMDIN 0x04
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#define IPV6_ADDRSCOPE_SITE 0x05
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#define IPV6_ADDRSCOPE_ORG 0x08
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#define IPV6_ADDRSCOPE_GLOBAL 0x0E
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#define USE_IP6_CMD_PARAM "-ipv6"
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/**
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* struct ipv6hdr - Internet Protocol V6 (IPv6) header.
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*
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* IPv6 packet header as defined in RFC 2460.
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*/
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struct ip6_hdr {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 priority:4,
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version:4;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u8 version:4,
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priority:4;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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u8 flow_lbl[3];
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__be16 payload_len;
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u8 nexthdr;
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u8 hop_limit;
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struct in6_addr saddr;
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struct in6_addr daddr;
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} __packed;
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#define IP6_HDR_SIZE (sizeof(struct ip6_hdr))
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/* struct udp_hdr - User Datagram Protocol header */
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struct udp_hdr {
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u16 udp_src; /* UDP source port */
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u16 udp_dst; /* UDP destination port */
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u16 udp_len; /* Length of UDP packet */
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u16 udp_xsum; /* Checksum */
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} __packed;
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/*
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* Handy for static initialisations of struct in6_addr, atlhough the
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* c99 '= { 0 }' idiom might work depending on you compiler.
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*/
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#define ZERO_IPV6_ADDR { { { 0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00 } } }
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#define IPV6_LINK_LOCAL_PREFIX 0xfe80
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/* hop limit for neighbour discovery packets */
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#define IPV6_NDISC_HOPLIMIT 255
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#define NDISC_TIMEOUT 5000UL
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#define NDISC_TIMEOUT_COUNT 3
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/* struct icmp6hdr - Internet Control Message Protocol header for IPV6 */
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struct icmp6hdr {
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u8 icmp6_type;
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#define IPV6_ICMP_ECHO_REQUEST 128
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#define IPV6_ICMP_ECHO_REPLY 129
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#define IPV6_NDISC_ROUTER_SOLICITATION 133
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#define IPV6_NDISC_ROUTER_ADVERTISEMENT 134
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#define IPV6_NDISC_NEIGHBOUR_SOLICITATION 135
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#define IPV6_NDISC_NEIGHBOUR_ADVERTISEMENT 136
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#define IPV6_NDISC_REDIRECT 137
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u8 icmp6_code;
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__be16 icmp6_cksum;
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/* ICMPv6 data */
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union {
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__be32 un_data32[1];
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__be16 un_data16[2];
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u8 un_data8[4];
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/* struct icmpv6_echo - echo request/reply message format */
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struct icmpv6_echo {
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__be16 identifier;
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__be16 sequence;
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} u_echo;
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/* struct icmpv6_nd_advt - Neighbor Advertisement format */
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struct icmpv6_nd_advt {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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__be32 reserved:5,
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override:1,
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solicited:1,
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router:1,
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reserved2:24;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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__be32 router:1,
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solicited:1,
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override:1,
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reserved:29;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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} u_nd_advt;
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/* struct icmpv6_nd_ra - Router Advertisement format */
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struct icmpv6_nd_ra {
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u8 hop_limit;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 reserved:6,
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other:1,
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managed:1;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u8 managed:1,
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other:1,
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reserved:6;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be16 rt_lifetime;
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} u_nd_ra;
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} icmp6_dataun;
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#define icmp6_identifier icmp6_dataun.u_echo.identifier
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#define icmp6_sequence icmp6_dataun.u_echo.sequence
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#define icmp6_pointer icmp6_dataun.un_data32[0]
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#define icmp6_mtu icmp6_dataun.un_data32[0]
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#define icmp6_unused icmp6_dataun.un_data32[0]
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#define icmp6_maxdelay icmp6_dataun.un_data16[0]
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#define icmp6_router icmp6_dataun.u_nd_advt.router
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#define icmp6_solicited icmp6_dataun.u_nd_advt.solicited
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#define icmp6_override icmp6_dataun.u_nd_advt.override
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#define icmp6_ndiscreserved icmp6_dataun.u_nd_advt.reserved
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#define icmp6_hop_limit icmp6_dataun.u_nd_ra.hop_limit
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#define icmp6_addrconf_managed icmp6_dataun.u_nd_ra.managed
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#define icmp6_addrconf_other icmp6_dataun.u_nd_ra.other
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#define icmp6_rt_lifetime icmp6_dataun.u_nd_ra.rt_lifetime
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} __packed;
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extern struct in6_addr const net_null_addr_ip6; /* NULL IPv6 address */
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extern struct in6_addr net_gateway6; /* Our gateways IPv6 address */
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extern struct in6_addr net_ip6; /* Our IPv6 addr (0 = unknown) */
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extern struct in6_addr net_link_local_ip6; /* Our link local IPv6 addr */
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extern u32 net_prefix_length; /* Our prefixlength (0 = unknown) */
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extern struct in6_addr net_server_ip6; /* Server IPv6 addr (0 = unknown) */
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extern struct in6_addr net_ping_ip6; /* the ipv6 address to ping */
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extern bool use_ip6;
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#if IS_ENABLED(CONFIG_IPV6)
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/**
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* string_to_ip6() - Convert IPv6 string addr to inner IPV6 addr format
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*
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* Examples of valid strings:
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* 2001:db8::0:1234:1
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* 2001:0db8:0000:0000:0000:0000:1234:0001
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* ::1
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* ::ffff:192.168.1.1
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*
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* Examples of invalid strings
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* 2001:db8::0::0 (:: can only appear once)
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* 2001:db8:192.168.1.1::1 (v4 part can only appear at the end)
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* 192.168.1.1 (we don't implicity map v4)
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*
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* @s: IPv6 string addr format
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* @len: IPv6 string addr length
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* @addr: converted IPv6 addr
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* Return: 0 if conversion successful, -EINVAL if fail
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*/
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int string_to_ip6(const char *s, size_t len, struct in6_addr *addr);
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/**
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* ip6_is_unspecified_addr() - Check if IPv6 addr is not set i.e. is zero
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*
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* @addr: IPv6 addr
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* Return: 0 if addr is not set, -1 if is set
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*/
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int ip6_is_unspecified_addr(struct in6_addr *addr);
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/**
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* ip6_is_our_addr() - Check if IPv6 addr belongs to our host addr
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*
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* We have 2 addresses that we should respond to. A link local address and a
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* global address. This returns true if the specified address matches either
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* of these.
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*
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* @addr: addr to check
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* Return: 0 if addr is our, -1 otherwise
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*/
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int ip6_is_our_addr(struct in6_addr *addr);
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/**
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* ip6_addr_in_subnet() - Check if two IPv6 addresses are in the same subnet
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*
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* @our_addr: first IPv6 addr
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* @neigh_addr: second IPv6 addr
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* @prefix_length: network mask length
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* Return: 0 if two addresses in the same subnet, -1 otherwise
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*/
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int ip6_addr_in_subnet(struct in6_addr *our_addr, struct in6_addr *neigh_addr,
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u32 prefix_length);
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/**
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* ip6_make_lladd() - rMake up IPv6 Link Local address
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*
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* @lladdr: formed IPv6 Link Local address
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* @enetaddr: MAC addr of a device
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*/
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void ip6_make_lladdr(struct in6_addr *lladr, unsigned char const enetaddr[6]);
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/**
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* ip6_make_snma() - aMake up Solicited Node Multicast Address from IPv6 addr
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*
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* @mcast_addr: formed SNMA addr
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* @ip6_addr: base IPv6 addr
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*/
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void ip6_make_snma(struct in6_addr *mcast_addr, struct in6_addr *ip6_addr);
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/**
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* ip6_make_mult_ethdstaddr() - Make up IPv6 multicast addr
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*
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* @enetaddr: MAC addr of a device
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* @mcast_addr: formed IPv6 multicast addr
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*/
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void ip6_make_mult_ethdstaddr(unsigned char enetaddr[6],
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struct in6_addr *mcast_addr);
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/**
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* csum_partial() - Compute an internet checksum
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*
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* @buff: buffer to be checksummed
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* @len: length of buffer
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* @sum: initial sum to be added in
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* Return: internet checksum of the buffer
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*/
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unsigned int csum_partial(const unsigned char *buff, int len, unsigned int sum);
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/**
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* csum_ipv6_magic() - Compute checksum of IPv6 "psuedo-header" per RFC2460 section 8.1
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*
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* @saddr: source IPv6 addr
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* @daddr: destination IPv6 add
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* @len: data length to be checksummed
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* @proto: IPv6 above protocol code
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* @csum: upper layer checksum
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* Return: computed checksum
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*/
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unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
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struct in6_addr *daddr, u16 len,
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unsigned short proto, unsigned int csum);
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/**
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* ip6_add_hdr() - Make up IPv6 header
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*
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* @xip: pointer to IPv6 header to be formed
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* @src: source IPv6 addr
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* @dest: destination IPv6 addr
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* @nextheader: next header type
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* @hoplimit: hop limit
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* @payload_len: payload length
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* Return: IPv6 header length
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*/
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int ip6_add_hdr(uchar *xip, struct in6_addr *src, struct in6_addr *dest,
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int nextheader, int hoplimit, int payload_len);
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/**
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* net_send_udp_packet6() - Make up UDP packet and send it
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*
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* @ether: destination MAC addr
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* @dest: destination IPv6 addr
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* @dport: destination port
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* @sport: source port
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* @len: UDP packet length
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* Return: 0 if send successfully, -1 otherwise
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*/
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int net_send_udp_packet6(uchar *ether, struct in6_addr *dest, int dport,
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int sport, int len);
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/**
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* net_ip6_handler() - Handle IPv6 packet
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*
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* @et: pointer to the beginning of the packet
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* @ip6: pointer to the beginning of IPv6 protocol
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* @len: incoming packet len
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* Return: 0 if handle packet successfully, -EINVAL in case of invalid protocol
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*/
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int net_ip6_handler(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len);
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/**
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* net_copy_ip6() - Copy IPv6 addr
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*
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* @to: destination IPv6 addr
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* @from: source IPv6 addr
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*/
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static inline void net_copy_ip6(void *to, const void *from)
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{
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memcpy((void *)to, from, sizeof(struct in6_addr));
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}
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#else
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static inline int
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string_to_ip6(const char *s, size_t len, struct in6_addr *addr)
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{
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return -EINVAL;
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}
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static inline int ip6_is_unspecified_addr(struct in6_addr *addr)
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{
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return -1;
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}
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static inline int ip6_is_our_addr(struct in6_addr *addr)
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{
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return -1;
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}
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static inline int
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ip6_addr_in_subnet(struct in6_addr *our_addr, struct in6_addr *neigh_addr,
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u32 prefix_length)
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{
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return -1;
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}
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static inline void
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ip6_make_lladdr(struct in6_addr *lladdr, unsigned char const enetaddr[6])
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{
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}
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static inline void
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ip6_make_snma(struct in6_addr *mcast_addr, struct in6_addr *ip6_addr)
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{
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}
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static inline void
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ip6_make_mult_ethdstaddr(unsigned char enetaddr[6],
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struct in6_addr *mcast_addr)
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{
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}
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static inline unsigned int
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csum_partial(const unsigned char *buff, int len, unsigned int sum)
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{
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return 0;
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}
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static inline unsigned short
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csum_ipv6_magic(struct in6_addr *saddr,
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struct in6_addr *daddr, u16 len,
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unsigned short proto, unsigned int csum)
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{
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return 0;
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}
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static inline unsigned int
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ip6_add_hdr(uchar *xip, struct in6_addr *src, struct in6_addr *dest,
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int nextheader, int hoplimit, int payload_len)
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{
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return 0;
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}
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static inline int
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net_send_udp_packet6(uchar *ether, struct in6_addr *dest,
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int dport, int sport, int len)
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{
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return -1;
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}
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static inline int
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net_ip6_handler(struct ethernet_hdr *et, struct ip6_hdr *ip6,
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int len)
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{
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return -EINVAL;
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}
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static inline void net_copy_ip6(void *to, const void *from)
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{
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}
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#endif
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#if IS_ENABLED(CONFIG_CMD_PING6)
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/* Send ping requset */
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void ping6_start(void);
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/**
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* ping6_receive() - Handle reception of ICMPv6 echo request/reply
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*
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* @et: pointer to incoming patcket
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* @ip6: pointer to IPv6 protocol
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* @len: packet length
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* Return: 0 if success, -EINVAL in case of failure during reception
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*/
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int ping6_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len);
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#else
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static inline void ping6_start(void)
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{
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}
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static inline
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int ping6_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_CMD_PING6 */
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#endif /* __NET6_H__ */
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