1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _IPV6_H |
3 | #define _IPV6_H |
4 | |
5 | #include <uapi/linux/ipv6.h> |
6 | |
7 | #define ipv6_optlen(p) (((p)->hdrlen+1) << 3) |
8 | #define ipv6_authlen(p) (((p)->hdrlen+2) << 2) |
9 | /* |
10 | * This structure contains configuration options per IPv6 link. |
11 | */ |
12 | struct ipv6_devconf { |
13 | __s32 forwarding; |
14 | __s32 hop_limit; |
15 | __s32 mtu6; |
16 | __s32 accept_ra; |
17 | __s32 accept_redirects; |
18 | __s32 autoconf; |
19 | __s32 dad_transmits; |
20 | __s32 rtr_solicits; |
21 | __s32 rtr_solicit_interval; |
22 | __s32 rtr_solicit_max_interval; |
23 | __s32 rtr_solicit_delay; |
24 | __s32 force_mld_version; |
25 | __s32 mldv1_unsolicited_report_interval; |
26 | __s32 mldv2_unsolicited_report_interval; |
27 | __s32 use_tempaddr; |
28 | __s32 temp_valid_lft; |
29 | __s32 temp_prefered_lft; |
30 | __s32 regen_max_retry; |
31 | __s32 max_desync_factor; |
32 | __s32 max_addresses; |
33 | __s32 accept_ra_defrtr; |
34 | __u32 ra_defrtr_metric; |
35 | __s32 accept_ra_min_hop_limit; |
36 | __s32 accept_ra_min_lft; |
37 | __s32 accept_ra_pinfo; |
38 | __s32 ignore_routes_with_linkdown; |
39 | #ifdef CONFIG_IPV6_ROUTER_PREF |
40 | __s32 accept_ra_rtr_pref; |
41 | __s32 rtr_probe_interval; |
42 | #ifdef CONFIG_IPV6_ROUTE_INFO |
43 | __s32 accept_ra_rt_info_min_plen; |
44 | __s32 accept_ra_rt_info_max_plen; |
45 | #endif |
46 | #endif |
47 | __s32 proxy_ndp; |
48 | __s32 accept_source_route; |
49 | __s32 accept_ra_from_local; |
50 | #ifdef CONFIG_IPV6_OPTIMISTIC_DAD |
51 | __s32 optimistic_dad; |
52 | __s32 use_optimistic; |
53 | #endif |
54 | #ifdef CONFIG_IPV6_MROUTE |
55 | atomic_t mc_forwarding; |
56 | #endif |
57 | __s32 disable_ipv6; |
58 | __s32 drop_unicast_in_l2_multicast; |
59 | __s32 accept_dad; |
60 | __s32 force_tllao; |
61 | __s32 ndisc_notify; |
62 | __s32 suppress_frag_ndisc; |
63 | __s32 accept_ra_mtu; |
64 | __s32 drop_unsolicited_na; |
65 | __s32 accept_untracked_na; |
66 | struct ipv6_stable_secret { |
67 | bool initialized; |
68 | struct in6_addr secret; |
69 | } stable_secret; |
70 | __s32 use_oif_addrs_only; |
71 | __s32 keep_addr_on_down; |
72 | __s32 seg6_enabled; |
73 | #ifdef CONFIG_IPV6_SEG6_HMAC |
74 | __s32 seg6_require_hmac; |
75 | #endif |
76 | __u32 enhanced_dad; |
77 | __u32 addr_gen_mode; |
78 | __s32 disable_policy; |
79 | __s32 ndisc_tclass; |
80 | __s32 rpl_seg_enabled; |
81 | __u32 ioam6_id; |
82 | __u32 ioam6_id_wide; |
83 | __u8 ioam6_enabled; |
84 | __u8 ndisc_evict_nocarrier; |
85 | __u8 ra_honor_pio_life; |
86 | |
87 | struct ctl_table_header *; |
88 | }; |
89 | |
90 | struct ipv6_params { |
91 | __s32 disable_ipv6; |
92 | __s32 autoconf; |
93 | }; |
94 | extern struct ipv6_params ipv6_defaults; |
95 | #include <linux/tcp.h> |
96 | #include <linux/udp.h> |
97 | |
98 | #include <net/inet_sock.h> |
99 | |
100 | static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
101 | { |
102 | return (struct ipv6hdr *)skb_network_header(skb); |
103 | } |
104 | |
105 | static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) |
106 | { |
107 | return (struct ipv6hdr *)skb_inner_network_header(skb); |
108 | } |
109 | |
110 | static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) |
111 | { |
112 | return (struct ipv6hdr *)skb_transport_header(skb); |
113 | } |
114 | |
115 | static inline unsigned int ipv6_transport_len(const struct sk_buff *skb) |
116 | { |
117 | return ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr) - |
118 | skb_network_header_len(skb); |
119 | } |
120 | |
121 | /* |
122 | This structure contains results of exthdrs parsing |
123 | as offsets from skb->nh. |
124 | */ |
125 | |
126 | struct inet6_skb_parm { |
127 | int iif; |
128 | __be16 ra; |
129 | __u16 dst0; |
130 | __u16 srcrt; |
131 | __u16 dst1; |
132 | __u16 lastopt; |
133 | __u16 nhoff; |
134 | __u16 flags; |
135 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
136 | __u16 dsthao; |
137 | #endif |
138 | __u16 frag_max_size; |
139 | __u16 srhoff; |
140 | |
141 | #define IP6SKB_XFRM_TRANSFORMED 1 |
142 | #define IP6SKB_FORWARDED 2 |
143 | #define IP6SKB_REROUTED 4 |
144 | #define IP6SKB_ROUTERALERT 8 |
145 | #define IP6SKB_FRAGMENTED 16 |
146 | #define IP6SKB_HOPBYHOP 32 |
147 | #define IP6SKB_L3SLAVE 64 |
148 | #define IP6SKB_JUMBOGRAM 128 |
149 | #define IP6SKB_SEG6 256 |
150 | #define IP6SKB_FAKEJUMBO 512 |
151 | #define IP6SKB_MULTIPATH 1024 |
152 | }; |
153 | |
154 | #if defined(CONFIG_NET_L3_MASTER_DEV) |
155 | static inline bool ipv6_l3mdev_skb(__u16 flags) |
156 | { |
157 | return flags & IP6SKB_L3SLAVE; |
158 | } |
159 | #else |
160 | static inline bool ipv6_l3mdev_skb(__u16 flags) |
161 | { |
162 | return false; |
163 | } |
164 | #endif |
165 | |
166 | #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) |
167 | #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb)) |
168 | |
169 | static inline int inet6_iif(const struct sk_buff *skb) |
170 | { |
171 | bool l3_slave = ipv6_l3mdev_skb(IP6CB(skb)->flags); |
172 | |
173 | return l3_slave ? skb->skb_iif : IP6CB(skb)->iif; |
174 | } |
175 | |
176 | static inline bool inet6_is_jumbogram(const struct sk_buff *skb) |
177 | { |
178 | return !!(IP6CB(skb)->flags & IP6SKB_JUMBOGRAM); |
179 | } |
180 | |
181 | /* can not be used in TCP layer after tcp_v6_fill_cb */ |
182 | static inline int inet6_sdif(const struct sk_buff *skb) |
183 | { |
184 | #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) |
185 | if (skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) |
186 | return IP6CB(skb)->iif; |
187 | #endif |
188 | return 0; |
189 | } |
190 | |
191 | struct tcp6_request_sock { |
192 | struct tcp_request_sock tcp6rsk_tcp; |
193 | }; |
194 | |
195 | struct ipv6_mc_socklist; |
196 | struct ipv6_ac_socklist; |
197 | struct ipv6_fl_socklist; |
198 | |
199 | struct inet6_cork { |
200 | struct ipv6_txoptions *opt; |
201 | u8 hop_limit; |
202 | u8 tclass; |
203 | }; |
204 | |
205 | /* struct ipv6_pinfo - ipv6 private area */ |
206 | struct ipv6_pinfo { |
207 | struct in6_addr saddr; |
208 | struct in6_pktinfo sticky_pktinfo; |
209 | const struct in6_addr *daddr_cache; |
210 | #ifdef CONFIG_IPV6_SUBTREES |
211 | const struct in6_addr *saddr_cache; |
212 | #endif |
213 | |
214 | __be32 flow_label; |
215 | __u32 frag_size; |
216 | |
217 | s16 hop_limit; |
218 | u8 mcast_hops; |
219 | |
220 | int ucast_oif; |
221 | int mcast_oif; |
222 | |
223 | /* pktoption flags */ |
224 | union { |
225 | struct { |
226 | __u16 srcrt:1, |
227 | osrcrt:1, |
228 | rxinfo:1, |
229 | rxoinfo:1, |
230 | rxhlim:1, |
231 | rxohlim:1, |
232 | hopopts:1, |
233 | ohopopts:1, |
234 | dstopts:1, |
235 | odstopts:1, |
236 | rxflow:1, |
237 | rxtclass:1, |
238 | rxpmtu:1, |
239 | rxorigdstaddr:1, |
240 | recvfragsize:1; |
241 | /* 1 bits hole */ |
242 | } bits; |
243 | __u16 all; |
244 | } rxopt; |
245 | |
246 | /* sockopt flags */ |
247 | __u8 srcprefs; /* 001: prefer temporary address |
248 | * 010: prefer public address |
249 | * 100: prefer care-of address |
250 | */ |
251 | __u8 pmtudisc; |
252 | __u8 min_hopcount; |
253 | __u8 tclass; |
254 | __be32 rcv_flowinfo; |
255 | |
256 | __u32 dst_cookie; |
257 | |
258 | struct ipv6_mc_socklist __rcu *ipv6_mc_list; |
259 | struct ipv6_ac_socklist *ipv6_ac_list; |
260 | struct ipv6_fl_socklist __rcu *ipv6_fl_list; |
261 | |
262 | struct ipv6_txoptions __rcu *opt; |
263 | struct sk_buff *pktoptions; |
264 | struct sk_buff *rxpmtu; |
265 | struct inet6_cork cork; |
266 | }; |
267 | |
268 | /* We currently use available bits from inet_sk(sk)->inet_flags, |
269 | * this could change in the future. |
270 | */ |
271 | #define inet6_test_bit(nr, sk) \ |
272 | test_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags) |
273 | #define inet6_set_bit(nr, sk) \ |
274 | set_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags) |
275 | #define inet6_clear_bit(nr, sk) \ |
276 | clear_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags) |
277 | #define inet6_assign_bit(nr, sk, val) \ |
278 | assign_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags, val) |
279 | |
280 | /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ |
281 | struct raw6_sock { |
282 | /* inet_sock has to be the first member of raw6_sock */ |
283 | struct inet_sock inet; |
284 | __u32 checksum; /* perform checksum */ |
285 | __u32 offset; /* checksum offset */ |
286 | struct icmp6_filter filter; |
287 | __u32 ip6mr_table; |
288 | |
289 | struct ipv6_pinfo inet6; |
290 | }; |
291 | |
292 | struct udp6_sock { |
293 | struct udp_sock udp; |
294 | |
295 | struct ipv6_pinfo inet6; |
296 | }; |
297 | |
298 | struct tcp6_sock { |
299 | struct tcp_sock tcp; |
300 | |
301 | struct ipv6_pinfo inet6; |
302 | }; |
303 | |
304 | extern int (struct sock *sk); |
305 | |
306 | struct tcp6_timewait_sock { |
307 | struct tcp_timewait_sock tcp6tw_tcp; |
308 | }; |
309 | |
310 | #if IS_ENABLED(CONFIG_IPV6) |
311 | bool ipv6_mod_enabled(void); |
312 | |
313 | static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk) |
314 | { |
315 | return sk_fullsock(sk: __sk) ? inet_sk(__sk)->pinet6 : NULL; |
316 | } |
317 | |
318 | #define raw6_sk(ptr) container_of_const(ptr, struct raw6_sock, inet.sk) |
319 | |
320 | #define ipv6_only_sock(sk) (sk->sk_ipv6only) |
321 | #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \ |
322 | inet6_sk(sk)->rxopt.bits.rxinfo) |
323 | |
324 | static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk) |
325 | { |
326 | if (sk->sk_family == AF_INET6) |
327 | return &sk->sk_v6_rcv_saddr; |
328 | return NULL; |
329 | } |
330 | |
331 | static inline int inet_v6_ipv6only(const struct sock *sk) |
332 | { |
333 | /* ipv6only field is at same position for timewait and other sockets */ |
334 | return ipv6_only_sock(sk); |
335 | } |
336 | #else |
337 | #define ipv6_only_sock(sk) 0 |
338 | #define ipv6_sk_rxinfo(sk) 0 |
339 | |
340 | static inline bool ipv6_mod_enabled(void) |
341 | { |
342 | return false; |
343 | } |
344 | |
345 | static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) |
346 | { |
347 | return NULL; |
348 | } |
349 | |
350 | static inline struct raw6_sock *raw6_sk(const struct sock *sk) |
351 | { |
352 | return NULL; |
353 | } |
354 | |
355 | #define inet6_rcv_saddr(__sk) NULL |
356 | #define inet_v6_ipv6only(__sk) 0 |
357 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
358 | #endif /* _IPV6_H */ |
359 | |