/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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#ifndef _IPV6_H

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#define _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_ADDR_GEN_MODE,

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DEVCONF_DISABLE_POLICY,

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DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,

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DEVCONF_NDISC_TCLASS,

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DEVCONF_MAX

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};

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#endif /* _IPV6_H */

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