usr/src/uts/common/inet/ip6.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
  26  */
  27
  28 #ifndef _INET_IP6_H
  29 #define _INET_IP6_H
  30
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #include <sys/isa_defs.h>
  36
  37 #ifdef  _KERNEL
  38 /* icmp6_t is used in the prototype of icmp_inbound_error_fanout_v6() */
  39 #include <netinet/icmp6.h>
  40 #endif  /* _KERNEL */
  41
  42 /* version number for IPv6 - hard to get this one wrong! */
  43 #define IPV6_VERSION            6
  44
  45 #define IPV6_HDR_LEN            40
  46
  47 #define IPV6_ADDR_LEN           16
  48
  49 /*
  50  * IPv6 address scopes.  The values of these enums also match the scope
  51  * field of multicast addresses.
  52  */
  53 typedef enum {
  54         IP6_SCOPE_INTFLOCAL = 1,        /* Multicast addresses only */
  55         IP6_SCOPE_LINKLOCAL,
  56         IP6_SCOPE_SUBNETLOCAL,          /* Multicast addresses only */
  57         IP6_SCOPE_ADMINLOCAL,           /* Multicast addresses only */
  58         IP6_SCOPE_SITELOCAL,
  59         IP6_SCOPE_GLOBAL
  60 } in6addr_scope_t;
  61
  62 /* From RFC 3542 - setting for IPV6_USE_MIN_MTU socket option */
  63 #define IPV6_USE_MIN_MTU_MULTICAST      -1      /* Default */
  64 #define IPV6_USE_MIN_MTU_NEVER          0
  65 #define IPV6_USE_MIN_MTU_ALWAYS         1
  66
  67 #ifdef  _KERNEL
  68
  69 /* Extract the scope from a multicast address */
  70 #ifdef _BIG_ENDIAN
  71 #define IN6_ADDR_MC_SCOPE(addr) \
  72         (((addr)->s6_addr32[0] & 0x000f0000) >> 16)
  73 #else
  74 #define IN6_ADDR_MC_SCOPE(addr) \
  75         (((addr)->s6_addr32[0] & 0x00000f00) >> 8)
  76 #endif
  77
  78 /* Default IPv4 TTL for IPv6-in-IPv4 encapsulated packets */
  79 #define IPV6_DEFAULT_HOPS       60      /* XXX What should it be? */
  80
  81 /* Max IPv6 TTL */
  82 #define IPV6_MAX_HOPS   255
  83
  84 /* Minimum IPv6 MTU from rfc2460 */
  85 #define IPV6_MIN_MTU            1280
  86
  87 /* EUI-64 based token length */
  88 #define IPV6_TOKEN_LEN          64
  89
  90 /* Length of an advertised IPv6 prefix */
  91 #define IPV6_PREFIX_LEN         64
  92
  93 /* Default and maximum tunnel encapsulation limits.  See RFC 2473. */
  94 #define IPV6_DEFAULT_ENCAPLIMIT 4
  95 #define IPV6_MAX_ENCAPLIMIT     255
  96
  97 /*
  98  * Minimum and maximum extension header lengths for IPv6.  The 8-bit
  99  * length field of each extension header (see rfc2460) specifies the
 100  * number of 8 octet units of data in the header not including the
 101  * first 8 octets.  A value of 0 would indicate 8 bytes (0 * 8 + 8),
 102  * and 255 would indicate 2048 bytes (255 * 8 + 8).
 103  */
 104 #define MIN_EHDR_LEN            8
 105 #define MAX_EHDR_LEN            2048
 106
 107 #ifdef _BIG_ENDIAN
 108 #define IPV6_DEFAULT_VERS_AND_FLOW      0x60000000
 109 #define IPV6_VERS_AND_FLOW_MASK         0xF0000000
 110 #define V6_MCAST                        0xFF000000
 111 #define V6_LINKLOCAL                    0xFE800000
 112
 113 #define IPV6_FLOW_TCLASS(x)             (((x) & IPV6_FLOWINFO_TCLASS) >> 20)
 114 #define IPV6_TCLASS_FLOW(f, c)          (((f) & ~IPV6_FLOWINFO_TCLASS) |\
 115                                         ((c) << 20))
 116 #else
 117 #define IPV6_DEFAULT_VERS_AND_FLOW      0x00000060
 118 #define IPV6_VERS_AND_FLOW_MASK         0x000000F0
 119 #define V6_MCAST                        0x000000FF
 120 #define V6_LINKLOCAL                    0x000080FE
 121
 122 #define IPV6_FLOW_TCLASS(x)             ((((x) & 0xf000U) >> 12) |\
 123                                         (((x) & 0xf) << 4))
 124 #define IPV6_TCLASS_FLOW(f, c)          (((f) & ~IPV6_FLOWINFO_TCLASS) |\
 125                                         ((((c) & 0xf) << 12) |\
 126                                         (((c) & 0xf0) >> 4)))
 127 #endif
 128
 129 /*
 130  * UTILITY MACROS FOR ADDRESSES.
 131  */
 132
 133 /*
 134  * Convert an IPv4 address mask to an IPv6 mask.   Pad with 1-bits.
 135  */
 136 #define V4MASK_TO_V6(v4, v6)    ((v6).s6_addr32[0] = 0xffffffffUL,      \
 137                                 (v6).s6_addr32[1] = 0xffffffffUL,       \
 138                                 (v6).s6_addr32[2] = 0xffffffffUL,       \
 139                                 (v6).s6_addr32[3] = (v4))
 140
 141 /*
 142  * Convert aligned IPv4-mapped IPv6 address into an IPv4 address.
 143  * Note: We use "v6" here in definition of macro instead of "(v6)"
 144  * Not possible to use "(v6)" here since macro is used with struct
 145  * field names as arguments.
 146  */
 147 #define V4_PART_OF_V6(v6)       v6.s6_addr32[3]
 148
 149 #ifdef _BIG_ENDIAN
 150 #define V6_OR_V4_INADDR_ANY(a)  ((a).s6_addr32[3] == 0 &&               \
 151                                 ((a).s6_addr32[2] == 0xffffU || \
 152                                 (a).s6_addr32[2] == 0) &&               \
 153                                 (a).s6_addr32[1] == 0 &&                \
 154                                 (a).s6_addr32[0] == 0)
 155
 156 #else
 157 #define V6_OR_V4_INADDR_ANY(a)  ((a).s6_addr32[3] == 0 &&               \
 158                                 ((a).s6_addr32[2] == 0xffff0000U ||     \
 159                                 (a).s6_addr32[2] == 0) &&               \
 160                                 (a).s6_addr32[1] == 0 &&                \
 161                                 (a).s6_addr32[0] == 0)
 162 #endif /* _BIG_ENDIAN */
 163
 164 /* IPv4-mapped CLASSD addresses */
 165 #ifdef _BIG_ENDIAN
 166 #define IN6_IS_ADDR_V4MAPPED_CLASSD(addr) \
 167         (((addr)->_S6_un._S6_u32[2] == 0x0000ffff) && \
 168         (CLASSD((addr)->_S6_un._S6_u32[3])) && \
 169         ((addr)->_S6_un._S6_u32[1] == 0) && \
 170         ((addr)->_S6_un._S6_u32[0] == 0))
 171 #else  /* _BIG_ENDIAN */
 172 #define IN6_IS_ADDR_V4MAPPED_CLASSD(addr) \
 173         (((addr)->_S6_un._S6_u32[2] == 0xffff0000U) && \
 174         (CLASSD((addr)->_S6_un._S6_u32[3])) && \
 175         ((addr)->_S6_un._S6_u32[1] == 0) && \
 176         ((addr)->_S6_un._S6_u32[0] == 0))
 177 #endif /* _BIG_ENDIAN */
 178
 179 /* Clear an IPv6 addr */
 180 #define V6_SET_ZERO(a)          ((a).s6_addr32[0] = 0,                  \
 181                                 (a).s6_addr32[1] = 0,                   \
 182                                 (a).s6_addr32[2] = 0,                   \
 183                                 (a).s6_addr32[3] = 0)
 184
 185 /* Mask comparison: is IPv6 addr a, and'ed with mask m, equal to addr b? */
 186 #define V6_MASK_EQ(a, m, b)                                             \
 187         ((((a).s6_addr32[0] & (m).s6_addr32[0]) == (b).s6_addr32[0]) && \
 188         (((a).s6_addr32[1] & (m).s6_addr32[1]) == (b).s6_addr32[1]) &&  \
 189         (((a).s6_addr32[2] & (m).s6_addr32[2]) == (b).s6_addr32[2]) &&  \
 190         (((a).s6_addr32[3] & (m).s6_addr32[3]) == (b).s6_addr32[3]))
 191
 192 #define V6_MASK_EQ_2(a, m, b)                                           \
 193         ((((a).s6_addr32[0] & (m).s6_addr32[0]) ==                      \
 194             ((b).s6_addr32[0]  & (m).s6_addr32[0])) &&                  \
 195         (((a).s6_addr32[1] & (m).s6_addr32[1]) ==                       \
 196             ((b).s6_addr32[1]  & (m).s6_addr32[1])) &&                  \
 197         (((a).s6_addr32[2] & (m).s6_addr32[2]) ==                       \
 198             ((b).s6_addr32[2]  & (m).s6_addr32[2])) &&                  \
 199         (((a).s6_addr32[3] & (m).s6_addr32[3]) ==                       \
 200             ((b).s6_addr32[3]  & (m).s6_addr32[3])))
 201
 202 /* Copy IPv6 address (s), logically and'ed with mask (m), into (d) */
 203 #define V6_MASK_COPY(s, m, d)                                           \
 204         ((d).s6_addr32[0] = (s).s6_addr32[0] & (m).s6_addr32[0],        \
 205         (d).s6_addr32[1] = (s).s6_addr32[1] & (m).s6_addr32[1],         \
 206         (d).s6_addr32[2] = (s).s6_addr32[2] & (m).s6_addr32[2],         \
 207         (d).s6_addr32[3] = (s).s6_addr32[3] & (m).s6_addr32[3])
 208
 209 #define ILL_FRAG_HASH_V6(v6addr, i)                                     \
 210         ((ntohl((v6addr).s6_addr32[3]) ^ (i ^ (i >> 8))) %              \
 211                                                 ILL_FRAG_HASH_TBL_COUNT)
 212
 213
 214 /*
 215  * GLOBAL EXTERNALS
 216  */
 217 extern const in6_addr_t ipv6_all_ones;
 218 extern const in6_addr_t ipv6_all_zeros;
 219 extern const in6_addr_t ipv6_loopback;
 220 extern const in6_addr_t ipv6_all_hosts_mcast;
 221 extern const in6_addr_t ipv6_all_rtrs_mcast;
 222 extern const in6_addr_t ipv6_all_v2rtrs_mcast;
 223 extern const in6_addr_t ipv6_solicited_node_mcast;
 224 extern const in6_addr_t ipv6_unspecified_group;
 225
 226 /*
 227  * FUNCTION PROTOTYPES
 228  */
 229 extern void     icmp_param_problem_nexthdr_v6(mblk_t *, boolean_t,
 230     ip_recv_attr_t *);
 231 extern void     icmp_pkt2big_v6(mblk_t *, uint32_t, boolean_t,
 232     ip_recv_attr_t *);
 233 extern void     icmp_time_exceeded_v6(mblk_t *, uint8_t, boolean_t,
 234     ip_recv_attr_t *);
 235 extern void     icmp_unreachable_v6(mblk_t *, uint8_t, boolean_t,
 236     ip_recv_attr_t *);
 237 extern mblk_t   *icmp_inbound_v6(mblk_t *, ip_recv_attr_t *);
 238 extern void     icmp_inbound_error_fanout_v6(mblk_t *, icmp6_t *,
 239     ip_recv_attr_t *);
 240 extern void     icmp_update_out_mib_v6(ill_t *, icmp6_t *);
 241
 242 extern boolean_t conn_wantpacket_v6(conn_t *, ip_recv_attr_t *, ip6_t *);
 243
 244 extern in6addr_scope_t  ip_addr_scope_v6(const in6_addr_t *);
 245 extern void     ip_build_hdrs_v6(uchar_t *, uint_t, const ip_pkt_t *, uint8_t,
 246     uint32_t);
 247 extern void     ip_fanout_udp_multi_v6(mblk_t *, ip6_t *, uint16_t, uint16_t,
 248     ip_recv_attr_t *);
 249 extern void     ip_fanout_send_icmp_v6(mblk_t *, uint_t, uint8_t,
 250     ip_recv_attr_t *);
 251 extern void     ip_fanout_proto_v6(mblk_t *, ip6_t *, ip_recv_attr_t *);
 252 extern int      ip_find_hdr_v6(mblk_t *, ip6_t *, boolean_t, ip_pkt_t *,
 253     uint8_t *);
 254 extern in6_addr_t ip_get_dst_v6(ip6_t *, const mblk_t *, boolean_t *);
 255 extern ip6_rthdr_t      *ip_find_rthdr_v6(ip6_t *, uint8_t *);
 256 extern boolean_t        ip_hdr_length_nexthdr_v6(mblk_t *, ip6_t *,
 257     uint16_t *, uint8_t **);
 258 extern int      ip_hdr_length_v6(mblk_t *, ip6_t *);
 259 extern uint32_t ip_massage_options_v6(ip6_t *, ip6_rthdr_t *, netstack_t *);
 260 extern void     ip_forward_xmit_v6(nce_t *, mblk_t *, ip6_t *, ip_recv_attr_t *,
 261     uint32_t, uint32_t);
 262 extern mblk_t   *ip_fraghdr_add_v6(mblk_t *, uint32_t, ip_xmit_attr_t *);
 263 extern int      ip_fragment_v6(mblk_t *, nce_t *, iaflags_t, uint_t, uint32_t,
 264     uint32_t, zoneid_t, zoneid_t, pfirepostfrag_t postfragfn,
 265     uintptr_t *ixa_cookie);
 266 extern int      ip_process_options_v6(mblk_t *, ip6_t *,
 267     uint8_t *, uint_t, uint8_t, ip_recv_attr_t *);
 268 extern void     ip_process_rthdr(mblk_t *, ip6_t *, ip6_rthdr_t *,
 269     ip_recv_attr_t *);
 270 extern int      ip_total_hdrs_len_v6(const ip_pkt_t *);
 271 extern mblk_t   *ipsec_early_ah_v6(mblk_t *, ip_recv_attr_t *);
 272 extern int      ipsec_ah_get_hdr_size_v6(mblk_t *, boolean_t);
 273 extern void     ip_send_potential_redirect_v6(mblk_t *, ip6_t *, ire_t *,
 274     ip_recv_attr_t *);
 275 extern void     ip_rput_v6(queue_t *, mblk_t *);
 276 extern mblk_t   *mld_input(mblk_t *, ip_recv_attr_t *);
 277 extern void     mld_joingroup(ilm_t *);
 278 extern void     mld_leavegroup(ilm_t *);
 279 extern void     mld_timeout_handler(void *);
 280
 281 extern void     pr_addr_dbg(char *, int, const void *);
 282 extern void     *ip6_kstat_init(netstackid_t, ip6_stat_t *);
 283 extern void     ip6_kstat_fini(netstackid_t, kstat_t *);
 284 extern size_t   ip6_get_src_preferences(ip_xmit_attr_t *, uint32_t *);
 285 extern int      ip6_set_src_preferences(ip_xmit_attr_t *, uint32_t);
 286
 287 #endif  /* _KERNEL */
 288
 289 #ifdef  __cplusplus
 290 }
 291 #endif
 292
 293 #endif  /* _INET_IP6_H */