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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _INET_IP6_H 28 #define _INET_IP6_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/isa_defs.h> 37 38 #ifdef _KERNEL 39 /* icmp6_t is used in the prototype of icmp_inbound_error_fanout_v6() */ 40 #include <netinet/icmp6.h> 41 #endif /* _KERNEL */ 42 43 /* version number for IPv6 - hard to get this one wrong! */ 44 #define IPV6_VERSION 6 45 46 #define IPV6_HDR_LEN 40 47 48 #define IPV6_ADDR_LEN 16 49 50 /* 51 * IPv6 address scopes. The values of these enums also match the scope 52 * field of multicast addresses. 53 */ 54 typedef enum { 55 IP6_SCOPE_INTFLOCAL = 1, /* Multicast addresses only */ 56 IP6_SCOPE_LINKLOCAL, 57 IP6_SCOPE_SUBNETLOCAL, /* Multicast addresses only */ 58 IP6_SCOPE_ADMINLOCAL, /* Multicast addresses only */ 59 IP6_SCOPE_SITELOCAL, 60 IP6_SCOPE_GLOBAL 61 } in6addr_scope_t; 62 63 #ifdef _KERNEL 64 65 /* 66 * Private header used between the transports and IP to carry the content 67 * of the options IPV6_PKTINFO/IPV6_RECVPKTINFO (the interface index only) 68 * and IPV6_NEXTHOP. 69 * Also used to specify that raw sockets do not want the UDP/TCP transport 70 * checksums calculated in IP (akin to IP_HDR_INCLUDED) and provide for 71 * IPV6_CHECKSUM on the transmit side (using ip6i_checksum_off). 72 * 73 * When this header is used it must be the first header in the packet i.e. 74 * before the real ip6 header. The use of a next header value of 255 75 * (IPPROTO_RAW) in this header indicates its presence. Note that 76 * ip6_nxt = IPPROTO_RAW indicates that "this" header is ip6_info - the 77 * next header is always IPv6. 78 * 79 * Note that ip6i_nexthop is at the same offset as ip6_dst so that 80 * this header can be kept in the packet while the it passes through 81 * ip_newroute* and the ndp code. Those routines will use ip6_dst for 82 * resolution. 83 * 84 * Implementation offset assumptions about ip6_info_t and ip6_t fields 85 * and their alignments shown in figure below 86 * 87 * ip6_info (Private headers from transports to IP) header below 88 * _______________________________________________________________ _ _ _ _ _ 89 * | .... | ip6i_nxt (255)| ......................|ip6i_nexthop| ...ip6_t. 90 * --------------------------------------------------------------- - - - - - 91 * ^ ^ 92 * <---- >| same offset for {ip6i_nxt,ip6_nxt} ^ 93 * ^ ^ 94 * <------^-------------------------------------->| same offset for 95 * ^ ^ {ip6i_nxthop,ip6_dst} 96 * _______________________________________________________________ _ _ _ 97 * | .... | ip6_nxt | ......................|ip6_dst | .other hdrs... 98 * --------------------------------------------------------------- - - - 99 * ip6_t (IPv6 protocol) header above 100 */ 101 struct ip6_info { 102 union { 103 struct ip6_info_ctl { 104 uint32_t ip6i_un1_flow; 105 uint16_t ip6i_un1_plen; /* payload length */ 106 uint8_t ip6i_un1_nxt; /* next header */ 107 uint8_t ip6i_un1_hlim; /* hop limit */ 108 } ip6i_un1; 109 } ip6i_ctlun; 110 int ip6i_flags; /* See below */ 111 int ip6i_ifindex; 112 int ip6i_checksum_off; 113 int ip6i_pad; 114 in6_addr_t ip6i_nexthop; /* Same offset as ip6_dst */ 115 }; 116 typedef struct ip6_info ip6i_t; 117 118 #define ip6i_flow ip6i_ctlun.ip6i_un1.ip6i_un1_flow 119 #define ip6i_vcf ip6i_flow /* Version, class, flow */ 120 #define ip6i_nxt ip6i_ctlun.ip6i_un1.ip6i_un1_nxt 121 #define ip6i_hops ip6i_ctlun.ip6i_un1.ip6i_un1_hlim 122 123 /* ip6_info flags */ 124 #define IP6I_IFINDEX 0x1 /* ip6i_ifindex is set (to nonzero value) */ 125 #define IP6I_NEXTHOP 0x2 /* ip6i_nexthop is different than ip6_dst */ 126 #define IP6I_NO_ULP_CKSUM 0x4 127 /* 128 * Do not generate TCP/UDP/SCTP transport checksum. 129 * Used by raw sockets. Does not affect the 130 * generation of transport checksums for ICMPv6 131 * since such packets always arrive through 132 * a raw socket. 133 */ 134 #define IP6I_UNSPEC_SRC 0x8 135 /* Used to carry conn_unspec_src through ip_newroute* */ 136 #define IP6I_RAW_CHECKSUM 0x10 137 /* Compute checksum and stuff in ip6i_checksum_off */ 138 #define IP6I_VERIFY_SRC 0x20 /* Verify ip6_src. Used when IPV6_PKTINFO */ 139 #define IP6I_ATTACH_IF 0x40 /* Bind to no failover address or BOUND_PIF. */ 140 #define IP6I_DROP_IFDELAYED 0x80 141 /* Drop the packet if delayed in ndp resolver */ 142 #define IP6I_ND_DELAYED 0x100 /* Packet was delayed in ndp resolver */ 143 #define IP6I_DONTFRAG 0x200 /* Don't fragment this packet */ 144 #define IP6I_HOPLIMIT 0x400 /* hoplimit has been set by the sender */ 145 146 /* 147 * These constants refer to the IPV6_USE_MIN_MTU API. The 148 * actually values used in the API are these values shifted down 149 * 10 bits minus 2 [-1, 1]. 0 (-2 after conversion) is considered 150 * the same as the default (-1). IP6I_API_USE_MIN_MTU(f, x) returns 151 * the flags field updated with min mtu. IP6I_USE_MIN_MTU_API takes the 152 * field and returns the API value (+ the -2 value). 153 */ 154 #define IP6I_USE_MIN_MTU_UNICAST 0x400 155 #define IP6I_USE_MIN_MTU_ALWAYS 0x800 156 #define IP6I_USE_MIN_MTU_NEVER 0xC00 157 #define IP6I_USE_MIN_MTU_API(x) ((((x) & 0xC00) >> 10) - 2) 158 #define IP6I_API_USE_MIN_MTU(f, x) (((f) & ~0xC00) &\ 159 ((((x) + 2) & 0x3) << 11)) 160 #define IPV6_USE_MIN_MTU_DEFAULT -2 161 #define IPV6_USE_MIN_MTU_UNICAST -1 162 #define IPV6_USE_MIN_MTU_ALWAYS 0 163 #define IPV6_USE_MIN_MTU_NEVER 1 164 165 /* Extract the scope from a multicast address */ 166 #ifdef _BIG_ENDIAN 167 #define IN6_ADDR_MC_SCOPE(addr) \ 168 (((addr)->s6_addr32[0] & 0x000f0000) >> 16) 169 #else 170 #define IN6_ADDR_MC_SCOPE(addr) \ 171 (((addr)->s6_addr32[0] & 0x00000f00) >> 8) 172 #endif 173 174 /* Default IPv4 TTL for IPv6-in-IPv4 encapsulated packets */ 175 #define IPV6_DEFAULT_HOPS 60 /* XXX What should it be? */ 176 177 /* Max IPv6 TTL */ 178 #define IPV6_MAX_HOPS 255 179 180 /* Minimum IPv6 MTU from rfc2460 */ 181 #define IPV6_MIN_MTU 1280 182 183 /* EUI-64 based token length */ 184 #define IPV6_TOKEN_LEN 64 185 186 /* Length of an advertised IPv6 prefix */ 187 #define IPV6_PREFIX_LEN 64 188 189 /* Default and maximum tunnel encapsulation limits. See RFC 2473. */ 190 #define IPV6_DEFAULT_ENCAPLIMIT 4 191 #define IPV6_MAX_ENCAPLIMIT 255 192 193 /* 194 * Minimum and maximum extension header lengths for IPv6. The 8-bit 195 * length field of each extension header (see rfc2460) specifies the 196 * number of 8 octet units of data in the header not including the 197 * first 8 octets. A value of 0 would indicate 8 bytes (0 * 8 + 8), 198 * and 255 would indicate 2048 bytes (255 * 8 + 8). 199 */ 200 #define MIN_EHDR_LEN 8 201 #define MAX_EHDR_LEN 2048 202 203 /* 204 * The high-order bit of the version field is used by the transports to 205 * indicate a rechability confirmation to IP. 206 */ 207 #ifdef _BIG_ENDIAN 208 #define IPV6_DEFAULT_VERS_AND_FLOW 0x60000000 209 #define IPV6_VERS_AND_FLOW_MASK 0xF0000000 210 #define IP_FORWARD_PROG 0x80000000 211 212 #define V6_MCAST 0xFF000000 213 #define V6_LINKLOCAL 0xFE800000 214 215 #define IPV6_FLOW_TCLASS(x) (((x) & IPV6_FLOWINFO_TCLASS) >> 20) 216 #define IPV6_TCLASS_FLOW(f, c) (((f) & ~IPV6_FLOWINFO_TCLASS) |\ 217 ((c) << 20)) 218 219 #else 220 #define IPV6_DEFAULT_VERS_AND_FLOW 0x00000060 221 #define IPV6_VERS_AND_FLOW_MASK 0x000000F0 222 #define IP_FORWARD_PROG 0x00000080 223 224 #define V6_MCAST 0x000000FF 225 #define V6_LINKLOCAL 0x000080FE 226 227 #define IPV6_FLOW_TCLASS(x) ((((x) & 0xf000U) >> 12) |\ 228 (((x) & 0xf) << 4)) 229 #define IPV6_TCLASS_FLOW(f, c) (((f) & ~IPV6_FLOWINFO_TCLASS) |\ 230 ((((c) & 0xf) << 12) |\ 231 (((c) & 0xf0) >> 4))) 232 #endif 233 234 /* 235 * UTILITY MACROS FOR ADDRESSES. 236 */ 237 238 /* 239 * Convert an IPv4 address mask to an IPv6 mask. Pad with 1-bits. 240 */ 241 #define V4MASK_TO_V6(v4, v6) ((v6).s6_addr32[0] = 0xffffffffUL, \ 242 (v6).s6_addr32[1] = 0xffffffffUL, \ 243 (v6).s6_addr32[2] = 0xffffffffUL, \ 244 (v6).s6_addr32[3] = (v4)) 245 246 /* 247 * Convert aligned IPv4-mapped IPv6 address into an IPv4 address. 248 * Note: We use "v6" here in definition of macro instead of "(v6)" 249 * Not possible to use "(v6)" here since macro is used with struct 250 * field names as arguments. 251 */ 252 #define V4_PART_OF_V6(v6) v6.s6_addr32[3] 253 254 #ifdef _BIG_ENDIAN 255 #define V6_OR_V4_INADDR_ANY(a) ((a).s6_addr32[3] == 0 && \ 256 ((a).s6_addr32[2] == 0xffffU || \ 257 (a).s6_addr32[2] == 0) && \ 258 (a).s6_addr32[1] == 0 && \ 259 (a).s6_addr32[0] == 0) 260 261 #else 262 #define V6_OR_V4_INADDR_ANY(a) ((a).s6_addr32[3] == 0 && \ 263 ((a).s6_addr32[2] == 0xffff0000U || \ 264 (a).s6_addr32[2] == 0) && \ 265 (a).s6_addr32[1] == 0 && \ 266 (a).s6_addr32[0] == 0) 267 #endif /* _BIG_ENDIAN */ 268 269 /* IPv4-mapped CLASSD addresses */ 270 #ifdef _BIG_ENDIAN 271 #define IN6_IS_ADDR_V4MAPPED_CLASSD(addr) \ 272 (((addr)->_S6_un._S6_u32[2] == 0x0000ffff) && \ 273 (CLASSD((addr)->_S6_un._S6_u32[3])) && \ 274 ((addr)->_S6_un._S6_u32[1] == 0) && \ 275 ((addr)->_S6_un._S6_u32[0] == 0)) 276 #else /* _BIG_ENDIAN */ 277 #define IN6_IS_ADDR_V4MAPPED_CLASSD(addr) \ 278 (((addr)->_S6_un._S6_u32[2] == 0xffff0000U) && \ 279 (CLASSD((addr)->_S6_un._S6_u32[3])) && \ 280 ((addr)->_S6_un._S6_u32[1] == 0) && \ 281 ((addr)->_S6_un._S6_u32[0] == 0)) 282 #endif /* _BIG_ENDIAN */ 283 284 /* Clear an IPv6 addr */ 285 #define V6_SET_ZERO(a) ((a).s6_addr32[0] = 0, \ 286 (a).s6_addr32[1] = 0, \ 287 (a).s6_addr32[2] = 0, \ 288 (a).s6_addr32[3] = 0) 289 290 /* Mask comparison: is IPv6 addr a, and'ed with mask m, equal to addr b? */ 291 #define V6_MASK_EQ(a, m, b) \ 292 ((((a).s6_addr32[0] & (m).s6_addr32[0]) == (b).s6_addr32[0]) && \ 293 (((a).s6_addr32[1] & (m).s6_addr32[1]) == (b).s6_addr32[1]) && \ 294 (((a).s6_addr32[2] & (m).s6_addr32[2]) == (b).s6_addr32[2]) && \ 295 (((a).s6_addr32[3] & (m).s6_addr32[3]) == (b).s6_addr32[3])) 296 297 #define V6_MASK_EQ_2(a, m, b) \ 298 ((((a).s6_addr32[0] & (m).s6_addr32[0]) == \ 299 ((b).s6_addr32[0] & (m).s6_addr32[0])) && \ 300 (((a).s6_addr32[1] & (m).s6_addr32[1]) == \ 301 ((b).s6_addr32[1] & (m).s6_addr32[1])) && \ 302 (((a).s6_addr32[2] & (m).s6_addr32[2]) == \ 303 ((b).s6_addr32[2] & (m).s6_addr32[2])) && \ 304 (((a).s6_addr32[3] & (m).s6_addr32[3]) == \ 305 ((b).s6_addr32[3] & (m).s6_addr32[3]))) 306 307 /* Copy IPv6 address (s), logically and'ed with mask (m), into (d) */ 308 #define V6_MASK_COPY(s, m, d) \ 309 ((d).s6_addr32[0] = (s).s6_addr32[0] & (m).s6_addr32[0], \ 310 (d).s6_addr32[1] = (s).s6_addr32[1] & (m).s6_addr32[1], \ 311 (d).s6_addr32[2] = (s).s6_addr32[2] & (m).s6_addr32[2], \ 312 (d).s6_addr32[3] = (s).s6_addr32[3] & (m).s6_addr32[3]) 313 314 #define ILL_FRAG_HASH_V6(v6addr, i) \ 315 ((ntohl((v6addr).s6_addr32[3]) ^ (i ^ (i >> 8))) % \ 316 ILL_FRAG_HASH_TBL_COUNT) 317 318 /* 319 * GLOBAL EXTERNALS 320 */ 321 extern uint_t ipv6_ire_default_count; /* Number of IPv6 IRE_DEFAULT entries */ 322 extern uint_t ipv6_ire_default_index; /* Walking IPv6 index used to mod in */ 323 extern int ipv6_ire_cache_cnt; /* Number of IPv6 IRE_CACHE entries */ 324 325 extern const in6_addr_t ipv6_all_ones; 326 extern const in6_addr_t ipv6_all_zeros; 327 extern const in6_addr_t ipv6_loopback; 328 extern const in6_addr_t ipv6_all_hosts_mcast; 329 extern const in6_addr_t ipv6_all_rtrs_mcast; 330 extern const in6_addr_t ipv6_all_v2rtrs_mcast; 331 extern const in6_addr_t ipv6_solicited_node_mcast; 332 extern const in6_addr_t ipv6_unspecified_group; 333 334 /* 335 * IPv6 mibs when the interface (ill) is not known. 336 * When the ill is known the per-interface mib in the ill is used. 337 */ 338 extern mib2_ipv6IfStatsEntry_t ip6_mib; 339 extern mib2_ipv6IfIcmpEntry_t icmp6_mib; 340 341 /* 342 * FUNCTION PROTOTYPES 343 */ 344 345 struct ipsec_out_s; 346 347 extern void convert2ascii(char *buf, const in6_addr_t *addr); 348 extern char *inet_ntop(int, const void *, char *, int); 349 extern int inet_pton(int, char *, void *); 350 extern void icmp_time_exceeded_v6(queue_t *, mblk_t *, uint8_t, 351 boolean_t, boolean_t); 352 extern void icmp_unreachable_v6(queue_t *, mblk_t *, uint8_t, 353 boolean_t, boolean_t); 354 extern void icmp_inbound_error_fanout_v6(queue_t *, mblk_t *, ip6_t *, 355 icmp6_t *, ill_t *, boolean_t, zoneid_t); 356 extern boolean_t conn_wantpacket_v6(conn_t *, ill_t *, ip6_t *, int, zoneid_t); 357 extern mblk_t *ip_add_info_v6(mblk_t *, ill_t *, const in6_addr_t *); 358 extern in6addr_scope_t ip_addr_scope_v6(const in6_addr_t *); 359 extern mblk_t *ip_bind_v6(queue_t *, mblk_t *, conn_t *, ip6_pkt_t *); 360 extern void ip_build_hdrs_v6(uchar_t *, uint_t, ip6_pkt_t *, uint8_t); 361 extern void ip_deliver_local_v6(queue_t *, mblk_t *, ill_t *, uint8_t, 362 uint_t, uint_t); 363 extern int ip_fanout_send_icmp_v6(queue_t *, mblk_t *, uint_t, 364 uint_t, uint8_t, uint_t, boolean_t, zoneid_t); 365 extern int ip_find_hdr_v6(mblk_t *, ip6_t *, ip6_pkt_t *, uint8_t *); 366 extern in6_addr_t ip_get_dst_v6(ip6_t *, boolean_t *); 367 extern ip6_rthdr_t *ip_find_rthdr_v6(ip6_t *, uint8_t *); 368 extern int ip_hdr_complete_v6(ip6_t *, zoneid_t); 369 extern boolean_t ip_hdr_length_nexthdr_v6(mblk_t *, ip6_t *, 370 uint16_t *, uint8_t **); 371 extern int ip_hdr_length_v6(mblk_t *, ip6_t *); 372 extern uint32_t ip_massage_options_v6(ip6_t *, ip6_rthdr_t *); 373 extern void ip_wput_frag_v6(mblk_t *, ire_t *, uint_t, conn_t *, int, int); 374 extern void ip_wput_ipsec_out_v6(queue_t *, mblk_t *, ip6_t *, ill_t *, 375 ire_t *); 376 extern int ip_total_hdrs_len_v6(ip6_pkt_t *); 377 extern int ipsec_ah_get_hdr_size_v6(mblk_t *, boolean_t); 378 extern void ip_wput_local_v6(queue_t *, ill_t *, ip6_t *, mblk_t *, 379 ire_t *, int); 380 extern void ip_wput_md_v6(queue_t *, mblk_t *, conn_t *); 381 extern void ip_output_v6(void *, mblk_t *, void *, int); 382 extern void ip_xmit_v6(mblk_t *, ire_t *, uint_t, conn_t *, int, 383 struct ipsec_out_s *); 384 extern void ip_rput_data_v6(queue_t *, ill_t *, mblk_t *, ip6_t *, 385 uint_t, mblk_t *); 386 extern void mld_input(queue_t *, mblk_t *, ill_t *); 387 extern void mld_joingroup(ilm_t *); 388 extern void mld_leavegroup(ilm_t *); 389 extern void mld_timeout_handler(void *); 390 extern void mld_timeout_start(int); 391 392 extern void pr_addr_dbg(char *, int, const void *); 393 extern ipif_t *ip_newroute_get_src_ipif_v6(ipif_t *, boolean_t, 394 const in6_addr_t *); 395 extern int ip_multirt_apply_membership_v6(int (*fn)(conn_t *, boolean_t, 396 const in6_addr_t *, int, mcast_record_t, const in6_addr_t *, 397 mblk_t *), ire_t *, conn_t *, boolean_t, const in6_addr_t *, 398 mcast_record_t, const in6_addr_t *, mblk_t *); 399 extern void ip_newroute_ipif_v6(queue_t *, mblk_t *, ipif_t *, 400 in6_addr_t, int, zoneid_t); 401 extern void ip_newroute_v6(queue_t *, mblk_t *, const in6_addr_t *, 402 const in6_addr_t *, ill_t *, zoneid_t); 403 extern void ip6_kstat_init(void); 404 extern size_t ip6_get_src_preferences(conn_t *, uint32_t *); 405 extern int ip6_set_src_preferences(conn_t *, uint32_t); 406 extern int ip6_set_pktinfo(cred_t *, conn_t *, struct in6_pktinfo *, 407 mblk_t *); 408 409 #endif /* _KERNEL */ 410 411 #ifdef __cplusplus 412 } 413 #endif 414 415 #endif /* _INET_IP6_H */ 416