Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Linux INET6 implementation |
| 3 | * |
| 4 | * Authors: |
| 5 | * Pedro Roque <roque@di.fc.ul.pt> |
| 6 | * |
| 7 | * $Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $ |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation; either version |
| 12 | * 2 of the License, or (at your option) any later version. |
| 13 | */ |
| 14 | |
| 15 | #ifndef _NET_IPV6_H |
| 16 | #define _NET_IPV6_H |
| 17 | |
| 18 | #include <linux/ipv6.h> |
| 19 | #include <linux/hardirq.h> |
Herbert Xu | 20283d8 | 2007-07-30 17:05:49 -0700 | [diff] [blame] | 20 | #include <net/if_inet6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <net/ndisc.h> |
| 22 | #include <net/flow.h> |
| 23 | #include <net/snmp.h> |
| 24 | |
| 25 | #define SIN6_LEN_RFC2133 24 |
| 26 | |
| 27 | #define IPV6_MAXPLEN 65535 |
| 28 | |
| 29 | /* |
| 30 | * NextHeader field of IPv6 header |
| 31 | */ |
| 32 | |
| 33 | #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ |
| 34 | #define NEXTHDR_TCP 6 /* TCP segment. */ |
| 35 | #define NEXTHDR_UDP 17 /* UDP message. */ |
| 36 | #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ |
| 37 | #define NEXTHDR_ROUTING 43 /* Routing header. */ |
| 38 | #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ |
| 39 | #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ |
| 40 | #define NEXTHDR_AUTH 51 /* Authentication header. */ |
| 41 | #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ |
| 42 | #define NEXTHDR_NONE 59 /* No next header */ |
| 43 | #define NEXTHDR_DEST 60 /* Destination options header. */ |
Masahide NAKAMURA | 2b74165 | 2006-08-23 20:34:26 -0700 | [diff] [blame] | 44 | #define NEXTHDR_MOBILITY 135 /* Mobility header. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #define NEXTHDR_MAX 255 |
| 47 | |
| 48 | |
| 49 | |
| 50 | #define IPV6_DEFAULT_HOPLIMIT 64 |
| 51 | #define IPV6_DEFAULT_MCASTHOPS 1 |
| 52 | |
| 53 | /* |
| 54 | * Addr type |
| 55 | * |
| 56 | * type - unicast | multicast |
| 57 | * scope - local | site | global |
| 58 | * v4 - compat |
| 59 | * v4mapped |
| 60 | * any |
| 61 | * loopback |
| 62 | */ |
| 63 | |
| 64 | #define IPV6_ADDR_ANY 0x0000U |
| 65 | |
| 66 | #define IPV6_ADDR_UNICAST 0x0001U |
| 67 | #define IPV6_ADDR_MULTICAST 0x0002U |
| 68 | |
| 69 | #define IPV6_ADDR_LOOPBACK 0x0010U |
| 70 | #define IPV6_ADDR_LINKLOCAL 0x0020U |
| 71 | #define IPV6_ADDR_SITELOCAL 0x0040U |
| 72 | |
| 73 | #define IPV6_ADDR_COMPATv4 0x0080U |
| 74 | |
| 75 | #define IPV6_ADDR_SCOPE_MASK 0x00f0U |
| 76 | |
| 77 | #define IPV6_ADDR_MAPPED 0x1000U |
| 78 | #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */ |
| 79 | |
| 80 | /* |
| 81 | * Addr scopes |
| 82 | */ |
| 83 | #ifdef __KERNEL__ |
| 84 | #define IPV6_ADDR_MC_SCOPE(a) \ |
| 85 | ((a)->s6_addr[1] & 0x0f) /* nonstandard */ |
| 86 | #define __IPV6_ADDR_SCOPE_INVALID -1 |
| 87 | #endif |
| 88 | #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 |
| 89 | #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 |
| 90 | #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 |
| 91 | #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 |
| 92 | #define IPV6_ADDR_SCOPE_GLOBAL 0x0e |
| 93 | |
| 94 | /* |
| 95 | * fragmentation header |
| 96 | */ |
| 97 | |
| 98 | struct frag_hdr { |
Al Viro | 44473a6 | 2006-11-08 00:21:46 -0800 | [diff] [blame] | 99 | __u8 nexthdr; |
| 100 | __u8 reserved; |
| 101 | __be16 frag_off; |
| 102 | __be32 identification; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | }; |
| 104 | |
| 105 | #define IP6_MF 0x0001 |
| 106 | |
| 107 | #ifdef __KERNEL__ |
| 108 | |
| 109 | #include <net/sock.h> |
| 110 | |
| 111 | /* sysctls */ |
| 112 | extern int sysctl_ipv6_bindv6only; |
| 113 | extern int sysctl_mld_max_msf; |
| 114 | |
Pavel Emelyanov | 3d7cc2b | 2008-01-09 00:33:11 -0800 | [diff] [blame] | 115 | extern struct ctl_path net_ipv6_ctl_path[]; |
| 116 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 117 | #define _DEVINC(statname, modifier, idev, field) \ |
| 118 | ({ \ |
| 119 | struct inet6_dev *_idev = (idev); \ |
| 120 | if (likely(_idev != NULL)) \ |
| 121 | SNMP_INC_STATS##modifier((_idev)->stats.statname, (field)); \ |
| 122 | SNMP_INC_STATS##modifier(statname##_statistics, (field)); \ |
| 123 | }) |
| 124 | |
Pavel Emelyanov | 8e7999c | 2007-10-15 02:40:06 -0700 | [diff] [blame] | 125 | #define _DEVADD(statname, modifier, idev, field, val) \ |
| 126 | ({ \ |
| 127 | struct inet6_dev *_idev = (idev); \ |
| 128 | if (likely(_idev != NULL)) \ |
| 129 | SNMP_ADD_STATS##modifier((_idev)->stats.statname, (field), (val)); \ |
| 130 | SNMP_ADD_STATS##modifier(statname##_statistics, (field), (val));\ |
| 131 | }) |
| 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | /* MIBs */ |
| 134 | DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics); |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 135 | |
| 136 | #define IP6_INC_STATS(idev,field) _DEVINC(ipv6, , idev, field) |
| 137 | #define IP6_INC_STATS_BH(idev,field) _DEVINC(ipv6, _BH, idev, field) |
| 138 | #define IP6_INC_STATS_USER(idev,field) _DEVINC(ipv6, _USER, idev, field) |
Pavel Emelyanov | 8e7999c | 2007-10-15 02:40:06 -0700 | [diff] [blame] | 139 | #define IP6_ADD_STATS_BH(idev,field,val) _DEVADD(ipv6, _BH, idev, field, val) |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics); |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 142 | DECLARE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg_statistics); |
| 143 | |
| 144 | #define ICMP6_INC_STATS(idev, field) _DEVINC(icmpv6, , idev, field) |
| 145 | #define ICMP6_INC_STATS_BH(idev, field) _DEVINC(icmpv6, _BH, idev, field) |
| 146 | #define ICMP6_INC_STATS_USER(idev, field) _DEVINC(icmpv6, _USER, idev, field) |
| 147 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 148 | #define ICMP6MSGOUT_INC_STATS(idev, field) \ |
| 149 | _DEVINC(icmpv6msg, , idev, field +256) |
| 150 | #define ICMP6MSGOUT_INC_STATS_BH(idev, field) \ |
| 151 | _DEVINC(icmpv6msg, _BH, idev, field +256) |
| 152 | #define ICMP6MSGOUT_INC_STATS_USER(idev, field) \ |
| 153 | _DEVINC(icmpv6msg, _USER, idev, field +256) |
| 154 | #define ICMP6MSGIN_INC_STATS(idev, field) \ |
| 155 | _DEVINC(icmpv6msg, , idev, field) |
| 156 | #define ICMP6MSGIN_INC_STATS_BH(idev, field) \ |
| 157 | _DEVINC(icmpv6msg, _BH, idev, field) |
| 158 | #define ICMP6MSGIN_INC_STATS_USER(idev, field) \ |
| 159 | _DEVINC(icmpv6msg, _USER, idev, field) |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | struct ip6_ra_chain |
| 162 | { |
| 163 | struct ip6_ra_chain *next; |
| 164 | struct sock *sk; |
| 165 | int sel; |
| 166 | void (*destructor)(struct sock *); |
| 167 | }; |
| 168 | |
| 169 | extern struct ip6_ra_chain *ip6_ra_chain; |
| 170 | extern rwlock_t ip6_ra_lock; |
| 171 | |
| 172 | /* |
| 173 | This structure is prepared by protocol, when parsing |
| 174 | ancillary data and passed to IPv6. |
| 175 | */ |
| 176 | |
| 177 | struct ipv6_txoptions |
| 178 | { |
| 179 | /* Length of this structure */ |
| 180 | int tot_len; |
| 181 | |
| 182 | /* length of extension headers */ |
| 183 | |
| 184 | __u16 opt_flen; /* after fragment hdr */ |
| 185 | __u16 opt_nflen; /* before fragment hdr */ |
| 186 | |
| 187 | struct ipv6_opt_hdr *hopopt; |
| 188 | struct ipv6_opt_hdr *dst0opt; |
| 189 | struct ipv6_rt_hdr *srcrt; /* Routing Header */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | struct ipv6_opt_hdr *dst1opt; |
| 191 | |
| 192 | /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
| 193 | }; |
| 194 | |
| 195 | struct ip6_flowlabel |
| 196 | { |
| 197 | struct ip6_flowlabel *next; |
Al Viro | 90bcaf7 | 2006-11-08 00:25:17 -0800 | [diff] [blame] | 198 | __be32 label; |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 199 | atomic_t users; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | struct in6_addr dst; |
| 201 | struct ipv6_txoptions *opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | unsigned long linger; |
| 203 | u8 share; |
| 204 | u32 owner; |
| 205 | unsigned long lastuse; |
| 206 | unsigned long expires; |
| 207 | }; |
| 208 | |
| 209 | #define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF) |
| 210 | #define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF) |
| 211 | |
| 212 | struct ipv6_fl_socklist |
| 213 | { |
| 214 | struct ipv6_fl_socklist *next; |
| 215 | struct ip6_flowlabel *fl; |
| 216 | }; |
| 217 | |
Al Viro | 90bcaf7 | 2006-11-08 00:25:17 -0800 | [diff] [blame] | 218 | extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, |
| 220 | struct ip6_flowlabel * fl, |
| 221 | struct ipv6_txoptions * fopt); |
| 222 | extern void fl6_free_socklist(struct sock *sk); |
| 223 | extern int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen); |
Daniel Lezcano | 0a3e78a | 2007-12-11 02:23:18 -0800 | [diff] [blame] | 224 | extern int ip6_flowlabel_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | extern void ip6_flowlabel_cleanup(void); |
| 226 | |
| 227 | static inline void fl6_sock_release(struct ip6_flowlabel *fl) |
| 228 | { |
| 229 | if (fl) |
| 230 | atomic_dec(&fl->users); |
| 231 | } |
| 232 | |
| 233 | extern int ip6_ra_control(struct sock *sk, int sel, |
| 234 | void (*destructor)(struct sock *)); |
| 235 | |
| 236 | |
Herbert Xu | e5bbef2 | 2007-10-15 12:50:28 -0700 | [diff] [blame] | 237 | extern int ipv6_parse_hopopts(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 240 | extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, |
| 241 | int newtype, |
| 242 | struct ipv6_opt_hdr __user *newopt, |
| 243 | int newoptlen); |
YOSHIFUJI Hideaki | df9890c | 2005-11-20 12:23:18 +0900 | [diff] [blame] | 244 | struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
| 245 | struct ipv6_txoptions *opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Arnaldo Carvalho de Melo | 399c07d | 2005-12-13 23:24:28 -0800 | [diff] [blame] | 247 | extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); |
| 248 | |
Pavel Emelyanov | 7eb9515 | 2007-10-15 02:31:52 -0700 | [diff] [blame] | 249 | int ip6_frag_nqueues(void); |
| 250 | int ip6_frag_mem(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
| 252 | #define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */ |
| 253 | |
| 254 | /* |
| 255 | * Function prototype for build_xmit |
| 256 | */ |
| 257 | |
| 258 | typedef int (*inet_getfrag_t) (const void *data, |
| 259 | struct in6_addr *addr, |
| 260 | char *, |
| 261 | unsigned int, unsigned int); |
| 262 | |
YOSHIFUJI Hideaki | b1cacb6 | 2005-11-08 09:38:12 -0800 | [diff] [blame] | 263 | extern int __ipv6_addr_type(const struct in6_addr *addr); |
| 264 | static inline int ipv6_addr_type(const struct in6_addr *addr) |
| 265 | { |
| 266 | return __ipv6_addr_type(addr) & 0xffff; |
| 267 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | |
| 269 | static inline int ipv6_addr_scope(const struct in6_addr *addr) |
| 270 | { |
YOSHIFUJI Hideaki | b1cacb6 | 2005-11-08 09:38:12 -0800 | [diff] [blame] | 271 | return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
| 272 | } |
| 273 | |
| 274 | static inline int __ipv6_addr_src_scope(int type) |
| 275 | { |
| 276 | return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16)); |
| 277 | } |
| 278 | |
| 279 | static inline int ipv6_addr_src_scope(const struct in6_addr *addr) |
| 280 | { |
| 281 | return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
| 285 | { |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 286 | return memcmp(a1, a2, sizeof(struct in6_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Patrick McHardy | f2ffd9e | 2006-03-20 18:03:16 -0800 | [diff] [blame] | 289 | static inline int |
| 290 | ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m, |
| 291 | const struct in6_addr *a2) |
| 292 | { |
| 293 | unsigned int i; |
| 294 | |
| 295 | for (i = 0; i < 4; i++) |
| 296 | if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i]) |
| 297 | return 1; |
| 298 | return 0; |
| 299 | } |
| 300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2) |
| 302 | { |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 303 | memcpy(a1, a2, sizeof(struct in6_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
| 307 | const struct in6_addr *addr, |
| 308 | int plen) |
| 309 | { |
| 310 | /* caller must guarantee 0 <= plen <= 128 */ |
| 311 | int o = plen >> 3, |
| 312 | b = plen & 0x7; |
| 313 | |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 314 | memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | memcpy(pfx->s6_addr, addr, o); |
Eric Dumazet | db3459d | 2007-05-03 17:39:04 -0700 | [diff] [blame] | 316 | if (b != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } |
| 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | static inline void ipv6_addr_set(struct in6_addr *addr, |
Al Viro | 48818f8 | 2006-09-27 18:44:54 -0700 | [diff] [blame] | 321 | __be32 w1, __be32 w2, |
| 322 | __be32 w3, __be32 w4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | { |
| 324 | addr->s6_addr32[0] = w1; |
| 325 | addr->s6_addr32[1] = w2; |
| 326 | addr->s6_addr32[2] = w3; |
| 327 | addr->s6_addr32[3] = w4; |
| 328 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | static inline int ipv6_addr_equal(const struct in6_addr *a1, |
| 331 | const struct in6_addr *a2) |
| 332 | { |
| 333 | return (a1->s6_addr32[0] == a2->s6_addr32[0] && |
| 334 | a1->s6_addr32[1] == a2->s6_addr32[1] && |
| 335 | a1->s6_addr32[2] == a2->s6_addr32[2] && |
| 336 | a1->s6_addr32[3] == a2->s6_addr32[3]); |
| 337 | } |
| 338 | |
Al Viro | 48818f8 | 2006-09-27 18:44:54 -0700 | [diff] [blame] | 339 | static inline int __ipv6_prefix_equal(const __be32 *a1, const __be32 *a2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | unsigned int prefixlen) |
| 341 | { |
| 342 | unsigned pdw, pbi; |
| 343 | |
| 344 | /* check complete u32 in prefix */ |
| 345 | pdw = prefixlen >> 5; |
| 346 | if (pdw && memcmp(a1, a2, pdw << 2)) |
| 347 | return 0; |
| 348 | |
| 349 | /* check incomplete u32 in prefix */ |
| 350 | pbi = prefixlen & 0x1f; |
| 351 | if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) |
| 352 | return 0; |
| 353 | |
| 354 | return 1; |
| 355 | } |
| 356 | |
| 357 | static inline int ipv6_prefix_equal(const struct in6_addr *a1, |
| 358 | const struct in6_addr *a2, |
| 359 | unsigned int prefixlen) |
| 360 | { |
| 361 | return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, |
| 362 | prefixlen); |
| 363 | } |
| 364 | |
Pavel Emelyanov | 2588fe1 | 2007-10-17 19:44:34 -0700 | [diff] [blame] | 365 | struct inet_frag_queue; |
Pavel Emelyanov | 2588fe1 | 2007-10-17 19:44:34 -0700 | [diff] [blame] | 366 | |
Pavel Emelyanov | c6fda28 | 2007-10-17 19:46:47 -0700 | [diff] [blame] | 367 | struct ip6_create_arg { |
| 368 | __be32 id; |
| 369 | struct in6_addr *src; |
| 370 | struct in6_addr *dst; |
| 371 | }; |
| 372 | |
| 373 | void ip6_frag_init(struct inet_frag_queue *q, void *a); |
Pavel Emelyanov | abd6523 | 2007-10-17 19:47:21 -0700 | [diff] [blame] | 374 | int ip6_frag_match(struct inet_frag_queue *q, void *a); |
Pavel Emelyanov | c6fda28 | 2007-10-17 19:46:47 -0700 | [diff] [blame] | 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | static inline int ipv6_addr_any(const struct in6_addr *a) |
| 377 | { |
| 378 | return ((a->s6_addr32[0] | a->s6_addr32[1] | |
| 379 | a->s6_addr32[2] | a->s6_addr32[3] ) == 0); |
| 380 | } |
| 381 | |
Brian Haley | e773e4f | 2007-08-24 23:16:08 -0700 | [diff] [blame] | 382 | static inline int ipv6_addr_v4mapped(const struct in6_addr *a) |
| 383 | { |
| 384 | return ((a->s6_addr32[0] | a->s6_addr32[1]) == 0 && |
| 385 | a->s6_addr32[2] == htonl(0x0000ffff)); |
| 386 | } |
| 387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | /* |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 389 | * find the first different bit between two addresses |
| 390 | * length of address must be a multiple of 32bits |
| 391 | */ |
| 392 | static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) |
| 393 | { |
Al Viro | ef296f5 | 2006-11-14 20:56:33 -0800 | [diff] [blame] | 394 | const __be32 *a1 = token1, *a2 = token2; |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 395 | int i; |
| 396 | |
| 397 | addrlen >>= 2; |
| 398 | |
| 399 | for (i = 0; i < addrlen; i++) { |
Al Viro | ef296f5 | 2006-11-14 20:56:33 -0800 | [diff] [blame] | 400 | __be32 xb = a1[i] ^ a2[i]; |
| 401 | if (xb) |
| 402 | return i * 32 + 32 - fls(ntohl(xb)); |
YOSHIFUJI Hideaki | 971f359 | 2005-11-08 09:37:56 -0800 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | /* |
| 406 | * we should *never* get to this point since that |
| 407 | * would mean the addrs are equal |
| 408 | * |
| 409 | * However, we do get to it 8) And exacly, when |
| 410 | * addresses are equal 8) |
| 411 | * |
| 412 | * ip route add 1111::/128 via ... |
| 413 | * ip route add 1111::/64 via ... |
| 414 | * and we are here. |
| 415 | * |
| 416 | * Ideally, this function should stop comparison |
| 417 | * at prefix length. It does not, but it is still OK, |
| 418 | * if returned value is greater than prefix length. |
| 419 | * --ANK (980803) |
| 420 | */ |
| 421 | return (addrlen << 5); |
| 422 | } |
| 423 | |
| 424 | static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
| 425 | { |
| 426 | return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); |
| 427 | } |
| 428 | |
| 429 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | * Prototypes exported by ipv6 |
| 431 | */ |
| 432 | |
| 433 | /* |
| 434 | * rcv function (called from netdevice level) |
| 435 | */ |
| 436 | |
| 437 | extern int ipv6_rcv(struct sk_buff *skb, |
| 438 | struct net_device *dev, |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 439 | struct packet_type *pt, |
| 440 | struct net_device *orig_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
Patrick McHardy | b05e106 | 2006-01-06 23:03:34 -0800 | [diff] [blame] | 442 | extern int ip6_rcv_finish(struct sk_buff *skb); |
| 443 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | /* |
| 445 | * upper-layer output functions |
| 446 | */ |
| 447 | extern int ip6_xmit(struct sock *sk, |
| 448 | struct sk_buff *skb, |
| 449 | struct flowi *fl, |
| 450 | struct ipv6_txoptions *opt, |
| 451 | int ipfragok); |
| 452 | |
| 453 | extern int ip6_nd_hdr(struct sock *sk, |
| 454 | struct sk_buff *skb, |
| 455 | struct net_device *dev, |
| 456 | struct in6_addr *saddr, |
| 457 | struct in6_addr *daddr, |
| 458 | int proto, int len); |
| 459 | |
| 460 | extern int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); |
| 461 | |
| 462 | extern int ip6_append_data(struct sock *sk, |
| 463 | int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), |
| 464 | void *from, |
| 465 | int length, |
| 466 | int transhdrlen, |
| 467 | int hlimit, |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 468 | int tclass, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | struct ipv6_txoptions *opt, |
| 470 | struct flowi *fl, |
| 471 | struct rt6_info *rt, |
| 472 | unsigned int flags); |
| 473 | |
| 474 | extern int ip6_push_pending_frames(struct sock *sk); |
| 475 | |
| 476 | extern void ip6_flush_pending_frames(struct sock *sk); |
| 477 | |
| 478 | extern int ip6_dst_lookup(struct sock *sk, |
| 479 | struct dst_entry **dst, |
| 480 | struct flowi *fl); |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 481 | extern int ip6_dst_blackhole(struct sock *sk, |
| 482 | struct dst_entry **dst, |
| 483 | struct flowi *fl); |
Herbert Xu | 497c615 | 2006-07-30 20:19:33 -0700 | [diff] [blame] | 484 | extern int ip6_sk_dst_lookup(struct sock *sk, |
| 485 | struct dst_entry **dst, |
| 486 | struct flowi *fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
| 488 | /* |
| 489 | * skb processing functions |
| 490 | */ |
| 491 | |
| 492 | extern int ip6_output(struct sk_buff *skb); |
| 493 | extern int ip6_forward(struct sk_buff *skb); |
| 494 | extern int ip6_input(struct sk_buff *skb); |
| 495 | extern int ip6_mc_input(struct sk_buff *skb); |
| 496 | |
Herbert Xu | ef76bc2 | 2008-01-11 19:15:08 -0800 | [diff] [blame] | 497 | extern int __ip6_local_out(struct sk_buff *skb); |
| 498 | extern int ip6_local_out(struct sk_buff *skb); |
| 499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | /* |
| 501 | * Extension header (options) processing |
| 502 | */ |
| 503 | |
| 504 | extern u8 * ipv6_build_nfrag_opts(struct sk_buff *skb, |
| 505 | u8 *prev_hdr, |
| 506 | struct ipv6_txoptions *opt, |
| 507 | struct in6_addr *daddr, |
| 508 | u32 jumbolen); |
| 509 | extern u8 * ipv6_build_frag_opts(struct sk_buff *skb, |
| 510 | u8 *prev_hdr, |
| 511 | struct ipv6_txoptions *opt); |
| 512 | extern void ipv6_push_nfrag_opts(struct sk_buff *skb, |
| 513 | struct ipv6_txoptions *opt, |
| 514 | u8 *proto, |
| 515 | struct in6_addr **daddr_p); |
| 516 | extern void ipv6_push_frag_opts(struct sk_buff *skb, |
| 517 | struct ipv6_txoptions *opt, |
| 518 | u8 *proto); |
| 519 | |
| 520 | extern int ipv6_skip_exthdr(const struct sk_buff *, int start, |
Herbert Xu | 0d3d077 | 2005-04-24 20:16:19 -0700 | [diff] [blame] | 521 | u8 *nexthdrp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
| 523 | extern int ipv6_ext_hdr(u8 nexthdr); |
| 524 | |
Masahide NAKAMURA | c61a404 | 2006-08-23 19:18:35 -0700 | [diff] [blame] | 525 | extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type); |
| 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | /* |
| 528 | * socket options (ipv6_sockglue.c) |
| 529 | */ |
| 530 | |
| 531 | extern int ipv6_setsockopt(struct sock *sk, int level, |
| 532 | int optname, |
| 533 | char __user *optval, |
| 534 | int optlen); |
| 535 | extern int ipv6_getsockopt(struct sock *sk, int level, |
| 536 | int optname, |
| 537 | char __user *optval, |
| 538 | int __user *optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 539 | extern int compat_ipv6_setsockopt(struct sock *sk, |
| 540 | int level, |
| 541 | int optname, |
| 542 | char __user *optval, |
| 543 | int optlen); |
| 544 | extern int compat_ipv6_getsockopt(struct sock *sk, |
| 545 | int level, |
| 546 | int optname, |
| 547 | char __user *optval, |
| 548 | int __user *optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
Daniel Lezcano | 7f4e486 | 2007-12-11 02:25:35 -0800 | [diff] [blame] | 550 | extern int ipv6_packet_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
| 552 | extern void ipv6_packet_cleanup(void); |
| 553 | |
| 554 | extern int ip6_datagram_connect(struct sock *sk, |
| 555 | struct sockaddr *addr, int addr_len); |
| 556 | |
| 557 | extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); |
Al Viro | e69a4adc | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 558 | extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | u32 info, u8 *payload); |
| 560 | extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info); |
| 561 | |
| 562 | extern int inet6_release(struct socket *sock); |
| 563 | extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, |
| 564 | int addr_len); |
| 565 | extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
| 566 | int *uaddr_len, int peer); |
| 567 | extern int inet6_ioctl(struct socket *sock, unsigned int cmd, |
| 568 | unsigned long arg); |
| 569 | |
Arnaldo Carvalho de Melo | d8313f5 | 2005-12-13 23:25:44 -0800 | [diff] [blame] | 570 | extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, |
| 571 | struct sock *sk); |
| 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | /* |
| 574 | * reassembly.c |
| 575 | */ |
Pavel Emelyanov | 04128f2 | 2007-10-15 02:33:45 -0700 | [diff] [blame] | 576 | struct inet_frags_ctl; |
| 577 | extern struct inet_frags_ctl ip6_frags_ctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 579 | extern const struct proto_ops inet6_stream_ops; |
| 580 | extern const struct proto_ops inet6_dgram_ops; |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 581 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 582 | struct group_source_req; |
| 583 | struct group_filter; |
| 584 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 585 | extern int ip6_mc_source(int add, int omode, struct sock *sk, |
| 586 | struct group_source_req *pgsr); |
| 587 | extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); |
| 588 | extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, |
| 589 | struct group_filter __user *optval, |
| 590 | int __user *optlen); |
| 591 | |
| 592 | #ifdef CONFIG_PROC_FS |
| 593 | extern int ac6_proc_init(void); |
| 594 | extern void ac6_proc_exit(void); |
| 595 | extern int raw6_proc_init(void); |
| 596 | extern void raw6_proc_exit(void); |
| 597 | extern int tcp6_proc_init(void); |
| 598 | extern void tcp6_proc_exit(void); |
| 599 | extern int udp6_proc_init(void); |
| 600 | extern void udp6_proc_exit(void); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 601 | extern int udplite6_proc_init(void); |
| 602 | extern void udplite6_proc_exit(void); |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 603 | extern int ipv6_misc_proc_init(void); |
| 604 | extern void ipv6_misc_proc_exit(void); |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 605 | extern int snmp6_register_dev(struct inet6_dev *idev); |
| 606 | extern int snmp6_unregister_dev(struct inet6_dev *idev); |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 607 | |
| 608 | extern struct rt6_statistics rt6_stats; |
Herbert Xu | 7f7d9a6 | 2007-04-24 21:54:09 -0700 | [diff] [blame] | 609 | #else |
| 610 | static inline int snmp6_register_dev(struct inet6_dev *idev) |
| 611 | { |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | static inline int snmp6_unregister_dev(struct inet6_dev *idev) |
| 616 | { |
| 617 | return 0; |
| 618 | } |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 619 | #endif |
| 620 | |
| 621 | #ifdef CONFIG_SYSCTL |
| 622 | extern ctl_table ipv6_route_table[]; |
| 623 | extern ctl_table ipv6_icmp_table[]; |
| 624 | |
Daniel Lezcano | 291480c | 2008-01-10 02:47:55 -0800 | [diff] [blame] | 625 | extern int ipv6_sysctl_register(void); |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 626 | extern void ipv6_sysctl_unregister(void); |
| 627 | #endif |
| 628 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | #endif /* __KERNEL__ */ |
| 630 | #endif /* _NET_IPV6_H */ |