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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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adc176c547
Implemented RFC7527 Enhanced DAD.
IPv6 duplicate address detection can fail if there is some temporary
loopback of Ethernet frames. RFC7527 solves this by including a random
nonce in the NS messages used for DAD, and if an NS is received with the
same nonce it is assumed to be a looped back DAD probe and is ignored.
RFC7527 is enabled by default. Can be disabled by setting both of
conf/{all,interface}/enhanced_dad to zero.
Signed-off-by: Erik Nordmark <nordmark@arista.com>
Signed-off-by: Bob Gilligan <gilligan@arista.com>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
190 lines
3.7 KiB
C
190 lines
3.7 KiB
C
#ifndef _UAPI_IPV6_H
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#define _UAPI_IPV6_H
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#include <linux/libc-compat.h>
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#include <linux/types.h>
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#include <linux/in6.h>
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#include <asm/byteorder.h>
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/* The latest drafts declared increase in minimal mtu up to 1280. */
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#define IPV6_MIN_MTU 1280
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/*
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* Advanced API
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* source interface/address selection, source routing, etc...
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* *under construction*
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*/
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#if __UAPI_DEF_IN6_PKTINFO
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struct in6_pktinfo {
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struct in6_addr ipi6_addr;
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int ipi6_ifindex;
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};
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#endif
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#if __UAPI_DEF_IP6_MTUINFO
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struct ip6_mtuinfo {
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struct sockaddr_in6 ip6m_addr;
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__u32 ip6m_mtu;
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};
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#endif
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struct in6_ifreq {
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struct in6_addr ifr6_addr;
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__u32 ifr6_prefixlen;
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int ifr6_ifindex;
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};
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#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
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#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
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#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
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#define IPV6_SRCRT_TYPE_4 4 /* Segment Routing with IPv6 */
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/*
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* routing header
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*/
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struct ipv6_rt_hdr {
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__u8 nexthdr;
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__u8 hdrlen;
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__u8 type;
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__u8 segments_left;
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/*
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* type specific data
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* variable length field
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*/
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};
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struct ipv6_opt_hdr {
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__u8 nexthdr;
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__u8 hdrlen;
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/*
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* TLV encoded option data follows.
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*/
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} __attribute__((packed)); /* required for some archs */
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#define ipv6_destopt_hdr ipv6_opt_hdr
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#define ipv6_hopopt_hdr ipv6_opt_hdr
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/* Router Alert option values (RFC2711) */
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#define IPV6_OPT_ROUTERALERT_MLD 0x0000 /* MLD(RFC2710) */
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/*
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* routing header type 0 (used in cmsghdr struct)
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*/
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struct rt0_hdr {
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struct ipv6_rt_hdr rt_hdr;
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__u32 reserved;
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struct in6_addr addr[0];
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#define rt0_type rt_hdr.type
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};
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/*
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* routing header type 2
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*/
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struct rt2_hdr {
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struct ipv6_rt_hdr rt_hdr;
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__u32 reserved;
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struct in6_addr addr;
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#define rt2_type rt_hdr.type
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};
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/*
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* home address option in destination options header
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*/
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struct ipv6_destopt_hao {
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__u8 type;
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__u8 length;
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struct in6_addr addr;
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} __attribute__((packed));
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/*
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* IPv6 fixed header
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*
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* BEWARE, it is incorrect. The first 4 bits of flow_lbl
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* are glued to priority now, forming "class".
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*/
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struct ipv6hdr {
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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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};
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/* index values for the variables in ipv6_devconf */
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enum {
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DEVCONF_FORWARDING = 0,
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DEVCONF_HOPLIMIT,
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DEVCONF_MTU6,
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DEVCONF_ACCEPT_RA,
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DEVCONF_ACCEPT_REDIRECTS,
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DEVCONF_AUTOCONF,
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DEVCONF_DAD_TRANSMITS,
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DEVCONF_RTR_SOLICITS,
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DEVCONF_RTR_SOLICIT_INTERVAL,
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DEVCONF_RTR_SOLICIT_DELAY,
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DEVCONF_USE_TEMPADDR,
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DEVCONF_TEMP_VALID_LFT,
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DEVCONF_TEMP_PREFERED_LFT,
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DEVCONF_REGEN_MAX_RETRY,
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DEVCONF_MAX_DESYNC_FACTOR,
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DEVCONF_MAX_ADDRESSES,
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DEVCONF_FORCE_MLD_VERSION,
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DEVCONF_ACCEPT_RA_DEFRTR,
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DEVCONF_ACCEPT_RA_PINFO,
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DEVCONF_ACCEPT_RA_RTR_PREF,
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DEVCONF_RTR_PROBE_INTERVAL,
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DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
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DEVCONF_PROXY_NDP,
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DEVCONF_OPTIMISTIC_DAD,
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DEVCONF_ACCEPT_SOURCE_ROUTE,
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DEVCONF_MC_FORWARDING,
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DEVCONF_DISABLE_IPV6,
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DEVCONF_ACCEPT_DAD,
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DEVCONF_FORCE_TLLAO,
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DEVCONF_NDISC_NOTIFY,
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DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
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DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
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DEVCONF_SUPPRESS_FRAG_NDISC,
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DEVCONF_ACCEPT_RA_FROM_LOCAL,
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DEVCONF_USE_OPTIMISTIC,
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DEVCONF_ACCEPT_RA_MTU,
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DEVCONF_STABLE_SECRET,
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DEVCONF_USE_OIF_ADDRS_ONLY,
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DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
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DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
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DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
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DEVCONF_DROP_UNSOLICITED_NA,
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DEVCONF_KEEP_ADDR_ON_DOWN,
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DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
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DEVCONF_SEG6_ENABLED,
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DEVCONF_SEG6_REQUIRE_HMAC,
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DEVCONF_ENHANCED_DAD,
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DEVCONF_MAX
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};
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#endif /* _UAPI_IPV6_H */
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