| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | #ifndef _IPV6_H |
| 2 | #define _IPV6_H |
| 3 | |
| 4 | #include <asm/byteorder.h> |
| 5 | |
| 6 | /* The latest drafts declared increase in minimal mtu up to 1280. */ |
| 7 | |
| 8 | #define IPV6_MIN_MTU 1280 |
| 9 | |
| 10 | /* |
| 11 | * Advanced API |
| 12 | * source interface/address selection, source routing, etc... |
| 13 | * *under construction* |
| 14 | */ |
| 15 | |
| 16 | |
| 17 | #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */ |
| 18 | #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */ |
| 19 | #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */ |
| 20 | |
| 21 | /* |
| 22 | * routing header |
| 23 | */ |
| 24 | struct ipv6_rt_hdr { |
| 25 | __u8 nexthdr; |
| 26 | __u8 hdrlen; |
| 27 | __u8 type; |
| 28 | __u8 segments_left; |
| 29 | |
| 30 | /* |
| 31 | * type specific data |
| 32 | * variable length field |
| 33 | */ |
| 34 | }; |
| 35 | |
| 36 | |
| 37 | struct ipv6_opt_hdr { |
| 38 | __u8 nexthdr; |
| 39 | __u8 hdrlen; |
| 40 | /* |
| 41 | * TLV encoded option data follows. |
| 42 | */ |
| 43 | } __attribute__((packed)); /* required for some archs */ |
| 44 | |
| 45 | #define ipv6_destopt_hdr ipv6_opt_hdr |
| 46 | #define ipv6_hopopt_hdr ipv6_opt_hdr |
| 47 | |
| 48 | |
| 49 | /* |
| 50 | * routing header type 0 (used in cmsghdr struct) |
| 51 | */ |
| 52 | |
| 53 | struct rt0_hdr { |
| 54 | struct ipv6_rt_hdr rt_hdr; |
| 55 | __u32 reserved; |
| 56 | struct in6_addr addr[0]; |
| 57 | |
| 58 | #define rt0_type rt_hdr.type |
| 59 | }; |
| 60 | |
| 61 | /* |
| 62 | * routing header type 2 |
| 63 | */ |
| 64 | |
| 65 | struct rt2_hdr { |
| 66 | struct ipv6_rt_hdr rt_hdr; |
| 67 | __u32 reserved; |
| 68 | struct in6_addr addr; |
| 69 | |
| 70 | #define rt2_type rt_hdr.type |
| 71 | }; |
| 72 | |
| 73 | /* |
| 74 | * home address option in destination options header |
| 75 | */ |
| 76 | |
| 77 | struct ipv6_destopt_hao { |
| 78 | __u8 type; |
| 79 | __u8 length; |
| 80 | struct in6_addr addr; |
| 81 | } __attribute__((packed)); |
| 82 | |
| 83 | /* |
| 84 | * IPv6 fixed header |
| 85 | * |
| 86 | * BEWARE, it is incorrect. The first 4 bits of flow_lbl |
| 87 | * are glued to priority now, forming "class". |
| 88 | */ |
| 89 | |
| 90 | struct ipv6hdr { |
| 91 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
| 92 | __u8 priority:4, |
| 93 | version:4; |
| 94 | #elif defined(__BIG_ENDIAN_BITFIELD) |
| 95 | __u8 version:4, |
| 96 | priority:4; |
| 97 | #else |
| 98 | #error "Please fix <asm/byteorder.h>" |
| 99 | #endif |
| 100 | __u8 flow_lbl[3]; |
| 101 | |
| 102 | __be16 payload_len; |
| 103 | __u8 nexthdr; |
| 104 | __u8 hop_limit; |
| 105 | |
| 106 | struct in6_addr saddr; |
| 107 | struct in6_addr daddr; |
| 108 | }; |
| 109 | |
| 110 | |
| 111 | /* index values for the variables in ipv6_devconf */ |
| 112 | enum { |
| 113 | DEVCONF_FORWARDING = 0, |
| 114 | DEVCONF_HOPLIMIT, |
| 115 | DEVCONF_MTU6, |
| 116 | DEVCONF_ACCEPT_RA, |
| 117 | DEVCONF_ACCEPT_REDIRECTS, |
| 118 | DEVCONF_AUTOCONF, |
| 119 | DEVCONF_DAD_TRANSMITS, |
| 120 | DEVCONF_RTR_SOLICITS, |
| 121 | DEVCONF_RTR_SOLICIT_INTERVAL, |
| 122 | DEVCONF_RTR_SOLICIT_DELAY, |
| 123 | DEVCONF_USE_TEMPADDR, |
| 124 | DEVCONF_TEMP_VALID_LFT, |
| 125 | DEVCONF_TEMP_PREFERED_LFT, |
| 126 | DEVCONF_REGEN_MAX_RETRY, |
| 127 | DEVCONF_MAX_DESYNC_FACTOR, |
| 128 | DEVCONF_MAX_ADDRESSES, |
| 129 | DEVCONF_FORCE_MLD_VERSION, |
| 130 | DEVCONF_ACCEPT_RA_DEFRTR, |
| 131 | DEVCONF_ACCEPT_RA_PINFO, |
| 132 | DEVCONF_ACCEPT_RA_RTR_PREF, |
| 133 | DEVCONF_RTR_PROBE_INTERVAL, |
| 134 | DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN, |
| 135 | DEVCONF_PROXY_NDP, |
| 136 | DEVCONF_OPTIMISTIC_DAD, |
| 137 | DEVCONF_ACCEPT_SOURCE_ROUTE, |
| 138 | DEVCONF_MC_FORWARDING, |
| 139 | DEVCONF_DISABLE_IPV6, |
| 140 | DEVCONF_ACCEPT_DAD, |
| 141 | DEVCONF_FORCE_TLLAO, |
| 142 | DEVCONF_MAX |
| 143 | }; |
| 144 | |
| 145 | |
| 146 | #endif /* _IPV6_H */ |