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 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25 /*
26 * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
27 */
28
29 #ifndef _INET_IP6_H
30 #define _INET_IP6_H
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 /* From RFC 3542 - setting for IPV6_USE_MIN_MTU socket option */
64 #define IPV6_USE_MIN_MTU_MULTICAST -1 /* Default */
65 #define IPV6_USE_MIN_MTU_NEVER 0
66 #define IPV6_USE_MIN_MTU_ALWAYS 1
67
68 #ifdef _KERNEL
69
70 /* Extract the scope from a multicast address */
71 #ifdef _BIG_ENDIAN
72 #define IN6_ADDR_MC_SCOPE(addr) \
73 (((addr)->s6_addr32[0] & 0x000f0000) >> 16)
74 #else
75 #define IN6_ADDR_MC_SCOPE(addr) \
76 (((addr)->s6_addr32[0] & 0x00000f00) >> 8)
77 #endif
78
79 /* Default IPv4 TTL for IPv6-in-IPv4 encapsulated packets */
80 #define IPV6_DEFAULT_HOPS 60 /* XXX What should it be? */
81
82 /* Max IPv6 TTL */
83 #define IPV6_MAX_HOPS 255
84
85 /* Minimum IPv6 MTU from rfc2460 */
86 #define IPV6_MIN_MTU 1280
87
88 /* EUI-64 based token length */
89 #define IPV6_TOKEN_LEN 64
90
91 /* Length of an advertised IPv6 prefix */
92 #define IPV6_PREFIX_LEN 64
93
94 /* Default and maximum tunnel encapsulation limits. See RFC 2473. */
95 #define IPV6_DEFAULT_ENCAPLIMIT 4
96 #define IPV6_MAX_ENCAPLIMIT 255
97
98 /*
99 * Minimum and maximum extension header lengths for IPv6. The 8-bit
100 * length field of each extension header (see rfc2460) specifies the
101 * number of 8 octet units of data in the header not including the
102 * first 8 octets. A value of 0 would indicate 8 bytes (0 * 8 + 8),
103 * and 255 would indicate 2048 bytes (255 * 8 + 8).
104 */
105 #define MIN_EHDR_LEN 8
106 #define MAX_EHDR_LEN 2048
107
108 #ifdef _BIG_ENDIAN
109 #define IPV6_DEFAULT_VERS_AND_FLOW 0x60000000
110 #define IPV6_VERS_AND_FLOW_MASK 0xF0000000
111 #define V6_MCAST 0xFF000000
112 #define V6_LINKLOCAL 0xFE800000
113
114 #define IPV6_FLOW_TCLASS(x) (((x) & IPV6_FLOWINFO_TCLASS) >> 20)
115 #define IPV6_TCLASS_FLOW(f, c) (((f) & ~IPV6_FLOWINFO_TCLASS) |\
116 ((c) << 20))
117 #else
118 #define IPV6_DEFAULT_VERS_AND_FLOW 0x00000060
119 #define IPV6_VERS_AND_FLOW_MASK 0x000000F0
120 #define V6_MCAST 0x000000FF
121 #define V6_LINKLOCAL 0x000080FE
122
123 #define IPV6_FLOW_TCLASS(x) ((((x) & 0xf000U) >> 12) |\
124 (((x) & 0xf) << 4))
125 #define IPV6_TCLASS_FLOW(f, c) (((f) & ~IPV6_FLOWINFO_TCLASS) |\
126 ((((c) & 0xf) << 12) |\
127 (((c) & 0xf0) >> 4)))
128 #endif
129
130 /*
131 * UTILITY MACROS FOR ADDRESSES.
132 */
133
134 /*
135 * Convert an IPv4 address mask to an IPv6 mask. Pad with 1-bits.
136 */
137 #define V4MASK_TO_V6(v4, v6) ((v6).s6_addr32[0] = 0xffffffffUL, \
138 (v6).s6_addr32[1] = 0xffffffffUL, \
139 (v6).s6_addr32[2] = 0xffffffffUL, \
140 (v6).s6_addr32[3] = (v4))
141
142 /*
143 * Convert aligned IPv4-mapped IPv6 address into an IPv4 address.
144 * Note: We use "v6" here in definition of macro instead of "(v6)"
145 * Not possible to use "(v6)" here since macro is used with struct
146 * field names as arguments.
147 */
148 #define V4_PART_OF_V6(v6) v6.s6_addr32[3]
149
150 #ifdef _BIG_ENDIAN
151 #define V6_OR_V4_INADDR_ANY(a) ((a).s6_addr32[3] == 0 && \
152 ((a).s6_addr32[2] == 0xffffU || \
153 (a).s6_addr32[2] == 0) && \
154 (a).s6_addr32[1] == 0 && \
155 (a).s6_addr32[0] == 0)
156
157 #else
158 #define V6_OR_V4_INADDR_ANY(a) ((a).s6_addr32[3] == 0 && \
159 ((a).s6_addr32[2] == 0xffff0000U || \
160 (a).s6_addr32[2] == 0) && \
161 (a).s6_addr32[1] == 0 && \
162 (a).s6_addr32[0] == 0)
163 #endif /* _BIG_ENDIAN */
164
165 /* IPv4-mapped CLASSD addresses */
166 #ifdef _BIG_ENDIAN
167 #define IN6_IS_ADDR_V4MAPPED_CLASSD(addr) \
168 (((addr)->_S6_un._S6_u32[2] == 0x0000ffff) && \
169 (CLASSD((addr)->_S6_un._S6_u32[3])) && \
170 ((addr)->_S6_un._S6_u32[1] == 0) && \
171 ((addr)->_S6_un._S6_u32[0] == 0))
172 #else /* _BIG_ENDIAN */
173 #define IN6_IS_ADDR_V4MAPPED_CLASSD(addr) \
174 (((addr)->_S6_un._S6_u32[2] == 0xffff0000U) && \
175 (CLASSD((addr)->_S6_un._S6_u32[3])) && \
176 ((addr)->_S6_un._S6_u32[1] == 0) && \
177 ((addr)->_S6_un._S6_u32[0] == 0))
178 #endif /* _BIG_ENDIAN */
179
180 /* Clear an IPv6 addr */
181 #define V6_SET_ZERO(a) ((a).s6_addr32[0] = 0, \
182 (a).s6_addr32[1] = 0, \
183 (a).s6_addr32[2] = 0, \
184 (a).s6_addr32[3] = 0)
185
186 /* Mask comparison: is IPv6 addr a, and'ed with mask m, equal to addr b? */
187 #define V6_MASK_EQ(a, m, b) \
188 ((((a).s6_addr32[0] & (m).s6_addr32[0]) == (b).s6_addr32[0]) && \
189 (((a).s6_addr32[1] & (m).s6_addr32[1]) == (b).s6_addr32[1]) && \
190 (((a).s6_addr32[2] & (m).s6_addr32[2]) == (b).s6_addr32[2]) && \
191 (((a).s6_addr32[3] & (m).s6_addr32[3]) == (b).s6_addr32[3]))
192
193 #define V6_MASK_EQ_2(a, m, b) \
194 ((((a).s6_addr32[0] & (m).s6_addr32[0]) == \
195 ((b).s6_addr32[0] & (m).s6_addr32[0])) && \
196 (((a).s6_addr32[1] & (m).s6_addr32[1]) == \
197 ((b).s6_addr32[1] & (m).s6_addr32[1])) && \
198 (((a).s6_addr32[2] & (m).s6_addr32[2]) == \
199 ((b).s6_addr32[2] & (m).s6_addr32[2])) && \
200 (((a).s6_addr32[3] & (m).s6_addr32[3]) == \
201 ((b).s6_addr32[3] & (m).s6_addr32[3])))
202
203 /* Copy IPv6 address (s), logically and'ed with mask (m), into (d) */
204 #define V6_MASK_COPY(s, m, d) \
205 ((d).s6_addr32[0] = (s).s6_addr32[0] & (m).s6_addr32[0], \
206 (d).s6_addr32[1] = (s).s6_addr32[1] & (m).s6_addr32[1], \
207 (d).s6_addr32[2] = (s).s6_addr32[2] & (m).s6_addr32[2], \
208 (d).s6_addr32[3] = (s).s6_addr32[3] & (m).s6_addr32[3])
209
210 #define ILL_FRAG_HASH_V6(v6addr, i) \
211 ((ntohl((v6addr).s6_addr32[3]) ^ (i ^ (i >> 8))) % \
212 ILL_FRAG_HASH_TBL_COUNT)
213
214
215 /*
216 * GLOBAL EXTERNALS
217 */
218 extern const in6_addr_t ipv6_all_ones;
219 extern const in6_addr_t ipv6_all_zeros;
220 extern const in6_addr_t ipv6_loopback;
221 extern const in6_addr_t ipv6_all_hosts_mcast;
222 extern const in6_addr_t ipv6_all_rtrs_mcast;
223 extern const in6_addr_t ipv6_all_v2rtrs_mcast;
224 extern const in6_addr_t ipv6_solicited_node_mcast;
225 extern const in6_addr_t ipv6_unspecified_group;
226
227 /*
228 * FUNCTION PROTOTYPES
229 */
230
231 extern void convert2ascii(char *buf, const in6_addr_t *addr);
232 extern void icmp_param_problem_nexthdr_v6(mblk_t *, boolean_t,
233 ip_recv_attr_t *);
234 extern void icmp_pkt2big_v6(mblk_t *, uint32_t, boolean_t,
235 ip_recv_attr_t *);
236 extern void icmp_time_exceeded_v6(mblk_t *, uint8_t, boolean_t,
237 ip_recv_attr_t *);
238 extern void icmp_unreachable_v6(mblk_t *, uint8_t, boolean_t,
239 ip_recv_attr_t *);
240 extern mblk_t *icmp_inbound_v6(mblk_t *, ip_recv_attr_t *);
241 extern void icmp_inbound_error_fanout_v6(mblk_t *, icmp6_t *,
242 ip_recv_attr_t *);
243 extern void icmp_update_out_mib_v6(ill_t *, icmp6_t *);
244
245 extern boolean_t conn_wantpacket_v6(conn_t *, ip_recv_attr_t *, ip6_t *);
246
247 extern in6addr_scope_t ip_addr_scope_v6(const in6_addr_t *);
248 extern void ip_build_hdrs_v6(uchar_t *, uint_t, const ip_pkt_t *, uint8_t,
249 uint32_t);
250 extern void ip_fanout_udp_multi_v6(mblk_t *, ip6_t *, uint16_t, uint16_t,
251 ip_recv_attr_t *);
252 extern void ip_fanout_send_icmp_v6(mblk_t *, uint_t, uint8_t,
253 ip_recv_attr_t *);
254 extern void ip_fanout_proto_v6(mblk_t *, ip6_t *, ip_recv_attr_t *);
255 extern int ip_find_hdr_v6(mblk_t *, ip6_t *, boolean_t, ip_pkt_t *,
256 uint8_t *);
257 extern in6_addr_t ip_get_dst_v6(ip6_t *, const mblk_t *, boolean_t *);
258 extern ip6_rthdr_t *ip_find_rthdr_v6(ip6_t *, uint8_t *);
259 extern boolean_t ip_hdr_length_nexthdr_v6(mblk_t *, ip6_t *,
260 uint16_t *, uint8_t **);
261 extern int ip_hdr_length_v6(mblk_t *, ip6_t *);
262 extern uint32_t ip_massage_options_v6(ip6_t *, ip6_rthdr_t *, netstack_t *);
263 extern void ip_forward_xmit_v6(nce_t *, mblk_t *, ip6_t *, ip_recv_attr_t *,
264 uint32_t, uint32_t);
265 extern mblk_t *ip_fraghdr_add_v6(mblk_t *, uint32_t, ip_xmit_attr_t *);
266 extern int ip_fragment_v6(mblk_t *, nce_t *, iaflags_t, uint_t, uint32_t,
267 uint32_t, zoneid_t, zoneid_t, pfirepostfrag_t postfragfn,
268 uintptr_t *ixa_cookie);
269 extern int ip_process_options_v6(mblk_t *, ip6_t *,
270 uint8_t *, uint_t, uint8_t, ip_recv_attr_t *);
271 extern void ip_process_rthdr(mblk_t *, ip6_t *, ip6_rthdr_t *,
272 ip_recv_attr_t *);
273 extern int ip_total_hdrs_len_v6(const ip_pkt_t *);
274 extern mblk_t *ipsec_early_ah_v6(mblk_t *, ip_recv_attr_t *);
275 extern int ipsec_ah_get_hdr_size_v6(mblk_t *, boolean_t);
276 extern void ip_send_potential_redirect_v6(mblk_t *, ip6_t *, ire_t *,
277 ip_recv_attr_t *);
278 extern void ip_rput_v6(queue_t *, mblk_t *);
279 extern mblk_t *mld_input(mblk_t *, ip_recv_attr_t *);
280 extern void mld_joingroup(ilm_t *);
281 extern void mld_leavegroup(ilm_t *);
282 extern void mld_timeout_handler(void *);
283
284 extern void pr_addr_dbg(char *, int, const void *);
285 extern void *ip6_kstat_init(netstackid_t, ip6_stat_t *);
286 extern void ip6_kstat_fini(netstackid_t, kstat_t *);
287 extern size_t ip6_get_src_preferences(ip_xmit_attr_t *, uint32_t *);
288 extern int ip6_set_src_preferences(ip_xmit_attr_t *, uint32_t);
289
290 #endif /* _KERNEL */
291
292 #ifdef __cplusplus
293 }
294 #endif
295
296 #endif /* _INET_IP6_H */