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      1 #ifndef _UAPI_IPV6_H
      2 #define _UAPI_IPV6_H
      3 
      4 #include <linux/libc-compat.h>
      5 #include <linux/types.h>
      6 #include <linux/in6.h>
      7 #include <asm/byteorder.h>
      8 
      9 /* The latest drafts declared increase in minimal mtu up to 1280. */
     10 
     11 #define IPV6_MIN_MTU	1280
     12 
     13 /*
     14  *	Advanced API
     15  *	source interface/address selection, source routing, etc...
     16  *	*under construction*
     17  */
     18 
     19 #if __UAPI_DEF_IN6_PKTINFO
     20 struct in6_pktinfo {
     21 	struct in6_addr	ipi6_addr;
     22 	int		ipi6_ifindex;
     23 };
     24 #endif
     25 
     26 #if __UAPI_DEF_IP6_MTUINFO
     27 struct ip6_mtuinfo {
     28 	struct sockaddr_in6	ip6m_addr;
     29 	__u32			ip6m_mtu;
     30 };
     31 #endif
     32 
     33 struct in6_ifreq {
     34 	struct in6_addr	ifr6_addr;
     35 	__u32		ifr6_prefixlen;
     36 	int		ifr6_ifindex;
     37 };
     38 
     39 #define IPV6_SRCRT_STRICT	0x01	/* Deprecated; will be removed */
     40 #define IPV6_SRCRT_TYPE_0	0	/* Deprecated; will be removed */
     41 #define IPV6_SRCRT_TYPE_2	2	/* IPv6 type 2 Routing Header	*/
     42 #define IPV6_SRCRT_TYPE_4	4	/* Segment Routing with IPv6 */
     43 
     44 /*
     45  *	routing header
     46  */
     47 struct ipv6_rt_hdr {
     48 	__u8		nexthdr;
     49 	__u8		hdrlen;
     50 	__u8		type;
     51 	__u8		segments_left;
     52 
     53 	/*
     54 	 *	type specific data
     55 	 *	variable length field
     56 	 */
     57 };
     58 
     59 
     60 struct ipv6_opt_hdr {
     61 	__u8 		nexthdr;
     62 	__u8 		hdrlen;
     63 	/*
     64 	 * TLV encoded option data follows.
     65 	 */
     66 } __attribute__((packed));	/* required for some archs */
     67 
     68 #define ipv6_destopt_hdr ipv6_opt_hdr
     69 #define ipv6_hopopt_hdr  ipv6_opt_hdr
     70 
     71 /* Router Alert option values (RFC2711) */
     72 #define IPV6_OPT_ROUTERALERT_MLD	0x0000	/* MLD(RFC2710) */
     73 
     74 /*
     75  *	routing header type 0 (used in cmsghdr struct)
     76  */
     77 
     78 struct rt0_hdr {
     79 	struct ipv6_rt_hdr	rt_hdr;
     80 	__u32			reserved;
     81 	struct in6_addr		addr[0];
     82 
     83 #define rt0_type		rt_hdr.type
     84 };
     85 
     86 /*
     87  *	routing header type 2
     88  */
     89 
     90 struct rt2_hdr {
     91 	struct ipv6_rt_hdr	rt_hdr;
     92 	__u32			reserved;
     93 	struct in6_addr		addr;
     94 
     95 #define rt2_type		rt_hdr.type
     96 };
     97 
     98 /*
     99  *	home address option in destination options header
    100  */
    101 
    102 struct ipv6_destopt_hao {
    103 	__u8			type;
    104 	__u8			length;
    105 	struct in6_addr		addr;
    106 } __attribute__((packed));
    107 
    108 /*
    109  *	IPv6 fixed header
    110  *
    111  *	BEWARE, it is incorrect. The first 4 bits of flow_lbl
    112  *	are glued to priority now, forming "class".
    113  */
    114 
    115 struct ipv6hdr {
    116 #if defined(__LITTLE_ENDIAN_BITFIELD)
    117 	__u8			priority:4,
    118 				version:4;
    119 #elif defined(__BIG_ENDIAN_BITFIELD)
    120 	__u8			version:4,
    121 				priority:4;
    122 #else
    123 #error	"Please fix <asm/byteorder.h>"
    124 #endif
    125 	__u8			flow_lbl[3];
    126 
    127 	__be16			payload_len;
    128 	__u8			nexthdr;
    129 	__u8			hop_limit;
    130 
    131 	struct	in6_addr	saddr;
    132 	struct	in6_addr	daddr;
    133 };
    134 
    135 
    136 /* index values for the variables in ipv6_devconf */
    137 enum {
    138 	DEVCONF_FORWARDING = 0,
    139 	DEVCONF_HOPLIMIT,
    140 	DEVCONF_MTU6,
    141 	DEVCONF_ACCEPT_RA,
    142 	DEVCONF_ACCEPT_REDIRECTS,
    143 	DEVCONF_AUTOCONF,
    144 	DEVCONF_DAD_TRANSMITS,
    145 	DEVCONF_RTR_SOLICITS,
    146 	DEVCONF_RTR_SOLICIT_INTERVAL,
    147 	DEVCONF_RTR_SOLICIT_DELAY,
    148 	DEVCONF_USE_TEMPADDR,
    149 	DEVCONF_TEMP_VALID_LFT,
    150 	DEVCONF_TEMP_PREFERED_LFT,
    151 	DEVCONF_REGEN_MAX_RETRY,
    152 	DEVCONF_MAX_DESYNC_FACTOR,
    153 	DEVCONF_MAX_ADDRESSES,
    154 	DEVCONF_FORCE_MLD_VERSION,
    155 	DEVCONF_ACCEPT_RA_DEFRTR,
    156 	DEVCONF_ACCEPT_RA_PINFO,
    157 	DEVCONF_ACCEPT_RA_RTR_PREF,
    158 	DEVCONF_RTR_PROBE_INTERVAL,
    159 	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
    160 	DEVCONF_PROXY_NDP,
    161 	DEVCONF_OPTIMISTIC_DAD,
    162 	DEVCONF_ACCEPT_SOURCE_ROUTE,
    163 	DEVCONF_MC_FORWARDING,
    164 	DEVCONF_DISABLE_IPV6,
    165 	DEVCONF_ACCEPT_DAD,
    166 	DEVCONF_FORCE_TLLAO,
    167 	DEVCONF_NDISC_NOTIFY,
    168 	DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
    169 	DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
    170 	DEVCONF_SUPPRESS_FRAG_NDISC,
    171 	DEVCONF_ACCEPT_RA_FROM_LOCAL,
    172 	DEVCONF_USE_OPTIMISTIC,
    173 	DEVCONF_ACCEPT_RA_MTU,
    174 	DEVCONF_STABLE_SECRET,
    175 	DEVCONF_USE_OIF_ADDRS_ONLY,
    176 	DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
    177 	DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
    178 	DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
    179 	DEVCONF_DROP_UNSOLICITED_NA,
    180 	DEVCONF_KEEP_ADDR_ON_DOWN,
    181 	DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
    182 	DEVCONF_SEG6_ENABLED,
    183 	DEVCONF_SEG6_REQUIRE_HMAC,
    184 	DEVCONF_ENHANCED_DAD,
    185 	DEVCONF_MAX
    186 };
    187 
    188 
    189 #endif /* _UAPI_IPV6_H */
    190