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Linux/include/uapi/linux/ipv6.h

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

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