This source file includes following definitions.
- inet_rsk
- inet_request_mark
- inet_request_bound_dev_if
- inet_sk_bound_l3mdev
- inet_bound_dev_eq
- sk_to_full_sk
- sk_const_to_full_sk
- skb_to_full_sk
- inet_sk
- __inet_sk_copy_descendant
- inet_sk_copy_descendant
- inet_sk_state_load
- __inet_ehashfn
- inet_sk_flowi_flags
- inet_inc_convert_csum
- inet_dec_convert_csum
- inet_get_convert_csum
- inet_can_nonlocal_bind
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12 #ifndef _INET_SOCK_H
13 #define _INET_SOCK_H
14
15 #include <linux/bitops.h>
16 #include <linux/string.h>
17 #include <linux/types.h>
18 #include <linux/jhash.h>
19 #include <linux/netdevice.h>
20
21 #include <net/flow.h>
22 #include <net/sock.h>
23 #include <net/request_sock.h>
24 #include <net/netns/hash.h>
25 #include <net/tcp_states.h>
26 #include <net/l3mdev.h>
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38
39 struct ip_options {
40 __be32 faddr;
41 __be32 nexthop;
42 unsigned char optlen;
43 unsigned char srr;
44 unsigned char rr;
45 unsigned char ts;
46 unsigned char is_strictroute:1,
47 srr_is_hit:1,
48 is_changed:1,
49 rr_needaddr:1,
50 ts_needtime:1,
51 ts_needaddr:1;
52 unsigned char router_alert;
53 unsigned char cipso;
54 unsigned char __pad2;
55 unsigned char __data[0];
56 };
57
58 struct ip_options_rcu {
59 struct rcu_head rcu;
60 struct ip_options opt;
61 };
62
63 struct ip_options_data {
64 struct ip_options_rcu opt;
65 char data[40];
66 };
67
68 struct inet_request_sock {
69 struct request_sock req;
70 #define ir_loc_addr req.__req_common.skc_rcv_saddr
71 #define ir_rmt_addr req.__req_common.skc_daddr
72 #define ir_num req.__req_common.skc_num
73 #define ir_rmt_port req.__req_common.skc_dport
74 #define ir_v6_rmt_addr req.__req_common.skc_v6_daddr
75 #define ir_v6_loc_addr req.__req_common.skc_v6_rcv_saddr
76 #define ir_iif req.__req_common.skc_bound_dev_if
77 #define ir_cookie req.__req_common.skc_cookie
78 #define ireq_net req.__req_common.skc_net
79 #define ireq_state req.__req_common.skc_state
80 #define ireq_family req.__req_common.skc_family
81
82 u16 snd_wscale : 4,
83 rcv_wscale : 4,
84 tstamp_ok : 1,
85 sack_ok : 1,
86 wscale_ok : 1,
87 ecn_ok : 1,
88 acked : 1,
89 no_srccheck: 1,
90 smc_ok : 1;
91 u32 ir_mark;
92 union {
93 struct ip_options_rcu __rcu *ireq_opt;
94 #if IS_ENABLED(CONFIG_IPV6)
95 struct {
96 struct ipv6_txoptions *ipv6_opt;
97 struct sk_buff *pktopts;
98 };
99 #endif
100 };
101 };
102
103 static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
104 {
105 return (struct inet_request_sock *)sk;
106 }
107
108 static inline u32 inet_request_mark(const struct sock *sk, struct sk_buff *skb)
109 {
110 if (!sk->sk_mark && sock_net(sk)->ipv4.sysctl_tcp_fwmark_accept)
111 return skb->mark;
112
113 return sk->sk_mark;
114 }
115
116 static inline int inet_request_bound_dev_if(const struct sock *sk,
117 struct sk_buff *skb)
118 {
119 #ifdef CONFIG_NET_L3_MASTER_DEV
120 struct net *net = sock_net(sk);
121
122 if (!sk->sk_bound_dev_if && net->ipv4.sysctl_tcp_l3mdev_accept)
123 return l3mdev_master_ifindex_by_index(net, skb->skb_iif);
124 #endif
125
126 return sk->sk_bound_dev_if;
127 }
128
129 static inline int inet_sk_bound_l3mdev(const struct sock *sk)
130 {
131 #ifdef CONFIG_NET_L3_MASTER_DEV
132 struct net *net = sock_net(sk);
133
134 if (!net->ipv4.sysctl_tcp_l3mdev_accept)
135 return l3mdev_master_ifindex_by_index(net,
136 sk->sk_bound_dev_if);
137 #endif
138
139 return 0;
140 }
141
142 static inline bool inet_bound_dev_eq(bool l3mdev_accept, int bound_dev_if,
143 int dif, int sdif)
144 {
145 if (!bound_dev_if)
146 return !sdif || l3mdev_accept;
147 return bound_dev_if == dif || bound_dev_if == sdif;
148 }
149
150 struct inet_cork {
151 unsigned int flags;
152 __be32 addr;
153 struct ip_options *opt;
154 unsigned int fragsize;
155 int length;
156 struct dst_entry *dst;
157 u8 tx_flags;
158 __u8 ttl;
159 __s16 tos;
160 char priority;
161 __u16 gso_size;
162 u64 transmit_time;
163 u32 mark;
164 };
165
166 struct inet_cork_full {
167 struct inet_cork base;
168 struct flowi fl;
169 };
170
171 struct ip_mc_socklist;
172 struct ipv6_pinfo;
173 struct rtable;
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194
195 struct inet_sock {
196
197 struct sock sk;
198 #if IS_ENABLED(CONFIG_IPV6)
199 struct ipv6_pinfo *pinet6;
200 #endif
201
202 #define inet_daddr sk.__sk_common.skc_daddr
203 #define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr
204 #define inet_dport sk.__sk_common.skc_dport
205 #define inet_num sk.__sk_common.skc_num
206
207 __be32 inet_saddr;
208 __s16 uc_ttl;
209 __u16 cmsg_flags;
210 __be16 inet_sport;
211 __u16 inet_id;
212
213 struct ip_options_rcu __rcu *inet_opt;
214 int rx_dst_ifindex;
215 __u8 tos;
216 __u8 min_ttl;
217 __u8 mc_ttl;
218 __u8 pmtudisc;
219 __u8 recverr:1,
220 is_icsk:1,
221 freebind:1,
222 hdrincl:1,
223 mc_loop:1,
224 transparent:1,
225 mc_all:1,
226 nodefrag:1;
227 __u8 bind_address_no_port:1,
228 defer_connect:1;
229
230
231
232 __u8 rcv_tos;
233 __u8 convert_csum;
234 int uc_index;
235 int mc_index;
236 __be32 mc_addr;
237 struct ip_mc_socklist __rcu *mc_list;
238 struct inet_cork_full cork;
239 };
240
241 #define IPCORK_OPT 1
242 #define IPCORK_ALLFRAG 2
243
244
245 #define IP_CMSG_PKTINFO BIT(0)
246 #define IP_CMSG_TTL BIT(1)
247 #define IP_CMSG_TOS BIT(2)
248 #define IP_CMSG_RECVOPTS BIT(3)
249 #define IP_CMSG_RETOPTS BIT(4)
250 #define IP_CMSG_PASSSEC BIT(5)
251 #define IP_CMSG_ORIGDSTADDR BIT(6)
252 #define IP_CMSG_CHECKSUM BIT(7)
253 #define IP_CMSG_RECVFRAGSIZE BIT(8)
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261
262 static inline struct sock *sk_to_full_sk(struct sock *sk)
263 {
264 #ifdef CONFIG_INET
265 if (sk && sk->sk_state == TCP_NEW_SYN_RECV)
266 sk = inet_reqsk(sk)->rsk_listener;
267 #endif
268 return sk;
269 }
270
271
272 static inline const struct sock *sk_const_to_full_sk(const struct sock *sk)
273 {
274 #ifdef CONFIG_INET
275 if (sk && sk->sk_state == TCP_NEW_SYN_RECV)
276 sk = ((const struct request_sock *)sk)->rsk_listener;
277 #endif
278 return sk;
279 }
280
281 static inline struct sock *skb_to_full_sk(const struct sk_buff *skb)
282 {
283 return sk_to_full_sk(skb->sk);
284 }
285
286 static inline struct inet_sock *inet_sk(const struct sock *sk)
287 {
288 return (struct inet_sock *)sk;
289 }
290
291 static inline void __inet_sk_copy_descendant(struct sock *sk_to,
292 const struct sock *sk_from,
293 const int ancestor_size)
294 {
295 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
296 sk_from->sk_prot->obj_size - ancestor_size);
297 }
298 #if !(IS_ENABLED(CONFIG_IPV6))
299 static inline void inet_sk_copy_descendant(struct sock *sk_to,
300 const struct sock *sk_from)
301 {
302 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
303 }
304 #endif
305
306 int inet_sk_rebuild_header(struct sock *sk);
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315 static inline int inet_sk_state_load(const struct sock *sk)
316 {
317
318 return smp_load_acquire(&sk->sk_state);
319 }
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329 void inet_sk_state_store(struct sock *sk, int newstate);
330
331 void inet_sk_set_state(struct sock *sk, int state);
332
333 static inline unsigned int __inet_ehashfn(const __be32 laddr,
334 const __u16 lport,
335 const __be32 faddr,
336 const __be16 fport,
337 u32 initval)
338 {
339 return jhash_3words((__force __u32) laddr,
340 (__force __u32) faddr,
341 ((__u32) lport) << 16 | (__force __u32)fport,
342 initval);
343 }
344
345 struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops,
346 struct sock *sk_listener,
347 bool attach_listener);
348
349 static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
350 {
351 __u8 flags = 0;
352
353 if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
354 flags |= FLOWI_FLAG_ANYSRC;
355 return flags;
356 }
357
358 static inline void inet_inc_convert_csum(struct sock *sk)
359 {
360 inet_sk(sk)->convert_csum++;
361 }
362
363 static inline void inet_dec_convert_csum(struct sock *sk)
364 {
365 if (inet_sk(sk)->convert_csum > 0)
366 inet_sk(sk)->convert_csum--;
367 }
368
369 static inline bool inet_get_convert_csum(struct sock *sk)
370 {
371 return !!inet_sk(sk)->convert_csum;
372 }
373
374
375 static inline bool inet_can_nonlocal_bind(struct net *net,
376 struct inet_sock *inet)
377 {
378 return net->ipv4.sysctl_ip_nonlocal_bind ||
379 inet->freebind || inet->transparent;
380 }
381
382 #endif