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ipv6.h
/* 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/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_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 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_MAX }; #endif /* _IPV6_H */
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