[linux-block.git] / include / uapi / linux / ipv6.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_IPV6_H
#define _UAPI_IPV6_H

#include <linux/libc-compat.h>
#include <linux/types.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[0];

#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_MAX
};


#endif /* _UAPI_IPV6_H */
Commit	Line	Data
6f52b16c	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
607ca46e DH	2	#ifndef _UAPI_IPV6_H
	3	#define _UAPI_IPV6_H
	4
c66ad9ca	5	#include <linux/libc-compat.h>
607ca46e DH	6	#include <linux/types.h>
	7	#include <linux/in6.h>
	8	#include <asm/byteorder.h>
	9
	10	/* The latest drafts declared increase in minimal mtu up to 1280. */
	11
	12	#define IPV6_MIN_MTU 1280
	13
	14	/*
	15	* Advanced API
	16	* source interface/address selection, source routing, etc...
	17	* under construction
	18	*/
	19
3b50d902	20	#if __UAPI_DEF_IN6_PKTINFO
607ca46e DH	21	struct in6_pktinfo {
	22	struct in6_addr ipi6_addr;
	23	int ipi6_ifindex;
	24	};
3b50d902	25	#endif
607ca46e	26
3b50d902	27	#if __UAPI_DEF_IP6_MTUINFO
607ca46e DH	28	struct ip6_mtuinfo {
	29	struct sockaddr_in6 ip6m_addr;
	30	__u32 ip6m_mtu;
	31	};
3b50d902	32	#endif
607ca46e DH	33
	34	struct in6_ifreq {
	35	struct in6_addr ifr6_addr;
	36	__u32 ifr6_prefixlen;
	37	int ifr6_ifindex;
	38	};
	39
	40	#define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
	41	#define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
	42	#define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
8610c7c6	43	#define IPV6_SRCRT_TYPE_3 3 /* RPL Segment Routing with IPv6 */
1ababeba	44	#define IPV6_SRCRT_TYPE_4 4 /* Segment Routing with IPv6 */
607ca46e DH	45
	46	/*
	47	* routing header
	48	*/
	49	struct ipv6_rt_hdr {
	50	__u8 nexthdr;
	51	__u8 hdrlen;
	52	__u8 type;
	53	__u8 segments_left;
	54
	55	/*
	56	* type specific data
	57	* variable length field
	58	*/
	59	};
	60
	61
	62	struct ipv6_opt_hdr {
	63	__u8 nexthdr;
	64	__u8 hdrlen;
	65	/*
	66	* TLV encoded option data follows.
	67	*/
	68	} __attribute__((packed)); /* required for some archs */
	69
	70	#define ipv6_destopt_hdr ipv6_opt_hdr
	71	#define ipv6_hopopt_hdr ipv6_opt_hdr
	72
dd3332bf YH	73	/* Router Alert option values (RFC2711) */
dd3332bf YH	74	#define IPV6_OPT_ROUTERALERT_MLD 0x0000 /* MLD(RFC2710) */
607ca46e DH	75
	76	/*
	77	* routing header type 0 (used in cmsghdr struct)
	78	*/
	79
	80	struct rt0_hdr {
	81	struct ipv6_rt_hdr rt_hdr;
	82	__u32 reserved;
	83	struct in6_addr addr[0];
	84
	85	#define rt0_type rt_hdr.type
	86	};
	87
	88	/*
	89	* routing header type 2
	90	*/
	91
	92	struct rt2_hdr {
	93	struct ipv6_rt_hdr rt_hdr;
	94	__u32 reserved;
	95	struct in6_addr addr;
	96
	97	#define rt2_type rt_hdr.type
	98	};
	99
	100	/*
	101	* home address option in destination options header
	102	*/
	103
	104	struct ipv6_destopt_hao {
	105	__u8 type;
	106	__u8 length;
	107	struct in6_addr addr;
	108	} __attribute__((packed));
	109
	110	/*
	111	* IPv6 fixed header
	112	*
	113	* BEWARE, it is incorrect. The first 4 bits of flow_lbl
	114	* are glued to priority now, forming "class".
	115	*/
	116
	117	struct ipv6hdr {
	118	#if defined(__LITTLE_ENDIAN_BITFIELD)
	119	__u8 priority:4,
	120	version:4;
	121	#elif defined(__BIG_ENDIAN_BITFIELD)
	122	__u8 version:4,
	123	priority:4;
	124	#else
	125	#error "Please fix <asm/byteorder.h>"
	126	#endif
	127	__u8 flow_lbl[3];
	128
	129	__be16 payload_len;
	130	__u8 nexthdr;
	131	__u8 hop_limit;
	132
58e0be1e HL	133	__struct_group(/* no tag /, addrs, / no attrs */,
	134	struct in6_addr saddr;
	135	struct in6_addr daddr;
	136	);
607ca46e DH	137	};
	138
	139
	140	/* index values for the variables in ipv6_devconf */
	141	enum {
	142	DEVCONF_FORWARDING = 0,
	143	DEVCONF_HOPLIMIT,
	144	DEVCONF_MTU6,
	145	DEVCONF_ACCEPT_RA,
	146	DEVCONF_ACCEPT_REDIRECTS,
	147	DEVCONF_AUTOCONF,
	148	DEVCONF_DAD_TRANSMITS,
	149	DEVCONF_RTR_SOLICITS,
	150	DEVCONF_RTR_SOLICIT_INTERVAL,
	151	DEVCONF_RTR_SOLICIT_DELAY,
	152	DEVCONF_USE_TEMPADDR,
	153	DEVCONF_TEMP_VALID_LFT,
	154	DEVCONF_TEMP_PREFERED_LFT,
	155	DEVCONF_REGEN_MAX_RETRY,
	156	DEVCONF_MAX_DESYNC_FACTOR,
	157	DEVCONF_MAX_ADDRESSES,
	158	DEVCONF_FORCE_MLD_VERSION,
	159	DEVCONF_ACCEPT_RA_DEFRTR,
	160	DEVCONF_ACCEPT_RA_PINFO,
	161	DEVCONF_ACCEPT_RA_RTR_PREF,
	162	DEVCONF_RTR_PROBE_INTERVAL,
	163	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
	164	DEVCONF_PROXY_NDP,
	165	DEVCONF_OPTIMISTIC_DAD,
	166	DEVCONF_ACCEPT_SOURCE_ROUTE,
	167	DEVCONF_MC_FORWARDING,
	168	DEVCONF_DISABLE_IPV6,
	169	DEVCONF_ACCEPT_DAD,
	170	DEVCONF_FORCE_TLLAO,
5cb04436	171	DEVCONF_NDISC_NOTIFY,
fc4eba58 HFS	172	DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
fc4eba58 HFS	173	DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
b800c3b9	174	DEVCONF_SUPPRESS_FRAG_NDISC,
d9333196	175	DEVCONF_ACCEPT_RA_FROM_LOCAL,
7fd2561e	176	DEVCONF_USE_OPTIMISTIC,
c2943f14	177	DEVCONF_ACCEPT_RA_MTU,
3d1bec99	178	DEVCONF_STABLE_SECRET,
3985e8a3	179	DEVCONF_USE_OIF_ADDRS_ONLY,
8013d1d7	180	DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
35103d11	181	DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
abbc3043	182	DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
7a02bf89	183	DEVCONF_DROP_UNSOLICITED_NA,
f1705ec1	184	DEVCONF_KEEP_ADDR_ON_DOWN,
bd11f074	185	DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
1ababeba	186	DEVCONF_SEG6_ENABLED,
bf355b8d	187	DEVCONF_SEG6_REQUIRE_HMAC,
adc176c5	188	DEVCONF_ENHANCED_DAD,
d35a00b8	189	DEVCONF_ADDR_GEN_MODE,
df789fe7	190	DEVCONF_DISABLE_POLICY,
bbea124b	191	DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
2210d6b2	192	DEVCONF_NDISC_TCLASS,
8610c7c6	193	DEVCONF_RPL_SEG_ENABLED,
6b2e04bc	194	DEVCONF_RA_DEFRTR_METRIC,
9ee11f0f JI	195	DEVCONF_IOAM6_ENABLED,
	196	DEVCONF_IOAM6_ID,
	197	DEVCONF_IOAM6_ID_WIDE,
18ac597a	198	DEVCONF_NDISC_EVICT_NOCARRIER,
3e0b8f52	199	DEVCONF_ACCEPT_UNTRACKED_NA,
607ca46e DH	200	DEVCONF_MAX
	201	};
	202
	203
	204	#endif /* _UAPI_IPV6_H */