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TOMOYO Linux Cross Reference
Linux/include/uapi/linux/ipv6.h

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  1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2 #ifndef _UAPI_IPV6_H
  3 #define _UAPI_IPV6_H
  4 
  5 #include <linux/libc-compat.h>
  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 
 20 #if __UAPI_DEF_IN6_PKTINFO
 21 struct in6_pktinfo {
 22         struct in6_addr ipi6_addr;
 23         int             ipi6_ifindex;
 24 };
 25 #endif
 26 
 27 #if __UAPI_DEF_IP6_MTUINFO
 28 struct ip6_mtuinfo {
 29         struct sockaddr_in6     ip6m_addr;
 30         __u32                   ip6m_mtu;
 31 };
 32 #endif
 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   */
 43 #define IPV6_SRCRT_TYPE_4       4       /* Segment Routing with IPv6 */
 44 
 45 /*
 46  *      routing header
 47  */
 48 struct ipv6_rt_hdr {
 49         __u8            nexthdr;
 50         __u8            hdrlen;
 51         __u8            type;
 52         __u8            segments_left;
 53 
 54         /*
 55          *      type specific data
 56          *      variable length field
 57          */
 58 };
 59 
 60 
 61 struct ipv6_opt_hdr {
 62         __u8            nexthdr;
 63         __u8            hdrlen;
 64         /* 
 65          * TLV encoded option data follows.
 66          */
 67 } __attribute__((packed));      /* required for some archs */
 68 
 69 #define ipv6_destopt_hdr ipv6_opt_hdr
 70 #define ipv6_hopopt_hdr  ipv6_opt_hdr
 71 
 72 /* Router Alert option values (RFC2711) */
 73 #define IPV6_OPT_ROUTERALERT_MLD        0x0000  /* MLD(RFC2710) */
 74 
 75 /*
 76  *      routing header type 0 (used in cmsghdr struct)
 77  */
 78 
 79 struct rt0_hdr {
 80         struct ipv6_rt_hdr      rt_hdr;
 81         __u32                   reserved;
 82         struct in6_addr         addr[0];
 83 
 84 #define rt0_type                rt_hdr.type
 85 };
 86 
 87 /*
 88  *      routing header type 2
 89  */
 90 
 91 struct rt2_hdr {
 92         struct ipv6_rt_hdr      rt_hdr;
 93         __u32                   reserved;
 94         struct in6_addr         addr;
 95 
 96 #define rt2_type                rt_hdr.type
 97 };
 98 
 99 /*
100  *      home address option in destination options header
101  */
102 
103 struct ipv6_destopt_hao {
104         __u8                    type;
105         __u8                    length;
106         struct in6_addr         addr;
107 } __attribute__((packed));
108 
109 /*
110  *      IPv6 fixed header
111  *
112  *      BEWARE, it is incorrect. The first 4 bits of flow_lbl
113  *      are glued to priority now, forming "class".
114  */
115 
116 struct ipv6hdr {
117 #if defined(__LITTLE_ENDIAN_BITFIELD)
118         __u8                    priority:4,
119                                 version:4;
120 #elif defined(__BIG_ENDIAN_BITFIELD)
121         __u8                    version:4,
122                                 priority:4;
123 #else
124 #error  "Please fix <asm/byteorder.h>"
125 #endif
126         __u8                    flow_lbl[3];
127 
128         __be16                  payload_len;
129         __u8                    nexthdr;
130         __u8                    hop_limit;
131 
132         struct  in6_addr        saddr;
133         struct  in6_addr        daddr;
134 };
135 
136 
137 /* index values for the variables in ipv6_devconf */
138 enum {
139         DEVCONF_FORWARDING = 0,
140         DEVCONF_HOPLIMIT,
141         DEVCONF_MTU6,
142         DEVCONF_ACCEPT_RA,
143         DEVCONF_ACCEPT_REDIRECTS,
144         DEVCONF_AUTOCONF,
145         DEVCONF_DAD_TRANSMITS,
146         DEVCONF_RTR_SOLICITS,
147         DEVCONF_RTR_SOLICIT_INTERVAL,
148         DEVCONF_RTR_SOLICIT_DELAY,
149         DEVCONF_USE_TEMPADDR,
150         DEVCONF_TEMP_VALID_LFT,
151         DEVCONF_TEMP_PREFERED_LFT,
152         DEVCONF_REGEN_MAX_RETRY,
153         DEVCONF_MAX_DESYNC_FACTOR,
154         DEVCONF_MAX_ADDRESSES,
155         DEVCONF_FORCE_MLD_VERSION,
156         DEVCONF_ACCEPT_RA_DEFRTR,
157         DEVCONF_ACCEPT_RA_PINFO,
158         DEVCONF_ACCEPT_RA_RTR_PREF,
159         DEVCONF_RTR_PROBE_INTERVAL,
160         DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
161         DEVCONF_PROXY_NDP,
162         DEVCONF_OPTIMISTIC_DAD,
163         DEVCONF_ACCEPT_SOURCE_ROUTE,
164         DEVCONF_MC_FORWARDING,
165         DEVCONF_DISABLE_IPV6,
166         DEVCONF_ACCEPT_DAD,
167         DEVCONF_FORCE_TLLAO,
168         DEVCONF_NDISC_NOTIFY,
169         DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
170         DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
171         DEVCONF_SUPPRESS_FRAG_NDISC,
172         DEVCONF_ACCEPT_RA_FROM_LOCAL,
173         DEVCONF_USE_OPTIMISTIC,
174         DEVCONF_ACCEPT_RA_MTU,
175         DEVCONF_STABLE_SECRET,
176         DEVCONF_USE_OIF_ADDRS_ONLY,
177         DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
178         DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
179         DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
180         DEVCONF_DROP_UNSOLICITED_NA,
181         DEVCONF_KEEP_ADDR_ON_DOWN,
182         DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
183         DEVCONF_SEG6_ENABLED,
184         DEVCONF_SEG6_REQUIRE_HMAC,
185         DEVCONF_ENHANCED_DAD,
186         DEVCONF_ADDR_GEN_MODE,
187         DEVCONF_DISABLE_POLICY,
188         DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
189         DEVCONF_NDISC_TCLASS,
190         DEVCONF_MAX
191 };
192 
193 
194 #endif /* _UAPI_IPV6_H */
195 

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