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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _IPV6_H
#define _IPV6_H
#include <linux/libc-compat.h>
#include <linux/types.h>
#include <linux/stddef.h>
#include <linux/in6.h>
#include <asm/byteorder.h>
/* The latest drafts declared increase in minimal mtu up to 1280. */
#define IPV6_MIN_MTU 1280
/*
* Advanced API
* source interface/address selection, source routing, etc...
* *under construction*
*/
#if __UAPI_DEF_IN6_PKTINFO
struct in6_pktinfo {
struct in6_addr ipi6_addr;
int ipi6_ifindex;
};
#endif
#if __UAPI_DEF_IP6_MTUINFO
struct ip6_mtuinfo {
struct sockaddr_in6 ip6m_addr;
__u32 ip6m_mtu;
};
#endif
struct in6_ifreq {
struct in6_addr ifr6_addr;
__u32 ifr6_prefixlen;
int ifr6_ifindex;
};
#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
#define IPV6_SRCRT_TYPE_3 3 /* RPL Segment Routing with IPv6 */
#define IPV6_SRCRT_TYPE_4 4 /* Segment Routing with IPv6 */
/*
* routing header
*/
struct ipv6_rt_hdr {
__u8 nexthdr;
__u8 hdrlen;
__u8 type;
__u8 segments_left;
/*
* type specific data
* variable length field
*/
};
struct ipv6_opt_hdr {
__u8 nexthdr;
__u8 hdrlen;
/*
* TLV encoded option data follows.
*/
} __attribute__((packed)); /* required for some archs */
#define ipv6_destopt_hdr ipv6_opt_hdr
#define ipv6_hopopt_hdr ipv6_opt_hdr
/* Router Alert option values (RFC2711) */
#define IPV6_OPT_ROUTERALERT_MLD 0x0000 /* MLD(RFC2710) */
/*
* routing header type 0 (used in cmsghdr struct)
*/
struct rt0_hdr {
struct ipv6_rt_hdr rt_hdr;
__u32 reserved;
struct in6_addr addr[];
#define rt0_type rt_hdr.type
};
/*
* routing header type 2
*/
struct rt2_hdr {
struct ipv6_rt_hdr rt_hdr;
__u32 reserved;
struct in6_addr addr;
#define rt2_type rt_hdr.type
};
/*
* home address option in destination options header
*/
struct ipv6_destopt_hao {
__u8 type;
__u8 length;
struct in6_addr addr;
} __attribute__((packed));
/*
* IPv6 fixed header
*
* BEWARE, it is incorrect. The first 4 bits of flow_lbl
* are glued to priority now, forming "class".
*/
struct ipv6hdr {
#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_group(/* no tag */, addrs, /* no attrs */,
struct in6_addr saddr;
struct in6_addr daddr;
);
};
/* index values for the variables in ipv6_devconf */
enum {
DEVCONF_FORWARDING = 0,
DEVCONF_HOPLIMIT,
DEVCONF_MTU6,
DEVCONF_ACCEPT_RA,
DEVCONF_ACCEPT_REDIRECTS,
DEVCONF_AUTOCONF,
DEVCONF_DAD_TRANSMITS,
DEVCONF_RTR_SOLICITS,
DEVCONF_RTR_SOLICIT_INTERVAL,
DEVCONF_RTR_SOLICIT_DELAY,
DEVCONF_USE_TEMPADDR,
DEVCONF_TEMP_VALID_LFT,
DEVCONF_TEMP_PREFERED_LFT,
DEVCONF_REGEN_MAX_RETRY,
DEVCONF_MAX_DESYNC_FACTOR,
DEVCONF_MAX_ADDRESSES,
DEVCONF_FORCE_MLD_VERSION,
DEVCONF_ACCEPT_RA_DEFRTR,
DEVCONF_ACCEPT_RA_PINFO,
DEVCONF_ACCEPT_RA_RTR_PREF,
DEVCONF_RTR_PROBE_INTERVAL,
DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
DEVCONF_PROXY_NDP,
DEVCONF_OPTIMISTIC_DAD,
DEVCONF_ACCEPT_SOURCE_ROUTE,
DEVCONF_MC_FORWARDING,
DEVCONF_DISABLE_IPV6,
DEVCONF_ACCEPT_DAD,
DEVCONF_FORCE_TLLAO,
DEVCONF_NDISC_NOTIFY,
DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
DEVCONF_SUPPRESS_FRAG_NDISC,
DEVCONF_ACCEPT_RA_FROM_LOCAL,
DEVCONF_USE_OPTIMISTIC,
DEVCONF_ACCEPT_RA_MTU,
DEVCONF_STABLE_SECRET,
DEVCONF_USE_OIF_ADDRS_ONLY,
DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
DEVCONF_DROP_UNSOLICITED_NA,
DEVCONF_KEEP_ADDR_ON_DOWN,
DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
DEVCONF_SEG6_ENABLED,
DEVCONF_SEG6_REQUIRE_HMAC,
DEVCONF_ENHANCED_DAD,
DEVCONF_ADDR_GEN_MODE,
DEVCONF_DISABLE_POLICY,
DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
DEVCONF_NDISC_TCLASS,
DEVCONF_RPL_SEG_ENABLED,
DEVCONF_RA_DEFRTR_METRIC,
DEVCONF_IOAM6_ENABLED,
DEVCONF_IOAM6_ID,
DEVCONF_IOAM6_ID_WIDE,
DEVCONF_NDISC_EVICT_NOCARRIER,
DEVCONF_ACCEPT_UNTRACKED_NA,
DEVCONF_ACCEPT_RA_MIN_LFT,
DEVCONF_MAX
};
#endif /* _IPV6_H */
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