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16#ifndef _INET_SOCK_H
17#define _INET_SOCK_H
18
19
20#include <linux/kmemcheck.h>
21#include <linux/string.h>
22#include <linux/types.h>
23#include <linux/jhash.h>
24#include <linux/netdevice.h>
25
26#include <net/flow.h>
27#include <net/sock.h>
28#include <net/request_sock.h>
29#include <net/netns/hash.h>
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42
43struct ip_options {
44 __be32 faddr;
45 __be32 nexthop;
46 unsigned char optlen;
47 unsigned char srr;
48 unsigned char rr;
49 unsigned char ts;
50 unsigned char is_strictroute:1,
51 srr_is_hit:1,
52 is_changed:1,
53 rr_needaddr:1,
54 ts_needtime:1,
55 ts_needaddr:1;
56 unsigned char router_alert;
57 unsigned char cipso;
58 unsigned char __pad2;
59 unsigned char __data[0];
60};
61
62struct ip_options_rcu {
63 struct rcu_head rcu;
64 struct ip_options opt;
65};
66
67struct ip_options_data {
68 struct ip_options_rcu opt;
69 char data[40];
70};
71
72struct inet_request_sock {
73 struct request_sock req;
74#if IS_ENABLED(CONFIG_IPV6)
75 u16 inet6_rsk_offset;
76#endif
77 __be16 loc_port;
78 __be32 loc_addr;
79 __be32 rmt_addr;
80 __be16 rmt_port;
81 kmemcheck_bitfield_begin(flags);
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 kmemcheck_bitfield_end(flags);
91 struct ip_options_rcu *opt;
92};
93
94static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
95{
96 return (struct inet_request_sock *)sk;
97}
98
99struct inet_cork {
100 unsigned int flags;
101 __be32 addr;
102 struct ip_options *opt;
103 unsigned int fragsize;
104 int length;
105 struct dst_entry *dst;
106 u8 tx_flags;
107};
108
109struct inet_cork_full {
110 struct inet_cork base;
111 struct flowi fl;
112};
113
114struct ip_mc_socklist;
115struct ipv6_pinfo;
116struct rtable;
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138struct inet_sock {
139
140 struct sock sk;
141#if IS_ENABLED(CONFIG_IPV6)
142 struct ipv6_pinfo *pinet6;
143#endif
144
145#define inet_daddr sk.__sk_common.skc_daddr
146#define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr
147#define inet_addrpair sk.__sk_common.skc_addrpair
148#define inet_dport sk.__sk_common.skc_dport
149#define inet_num sk.__sk_common.skc_num
150#define inet_portpair sk.__sk_common.skc_portpair
151
152 __be32 inet_saddr;
153 __s16 uc_ttl;
154 __u16 cmsg_flags;
155 __be16 inet_sport;
156 __u16 inet_id;
157
158 struct ip_options_rcu __rcu *inet_opt;
159 int rx_dst_ifindex;
160 __u8 tos;
161 __u8 min_ttl;
162 __u8 mc_ttl;
163 __u8 pmtudisc;
164 __u8 recverr:1,
165 is_icsk:1,
166 freebind:1,
167 hdrincl:1,
168 mc_loop:1,
169 transparent:1,
170 mc_all:1,
171 nodefrag:1;
172 __u8 rcv_tos;
173 int uc_index;
174 int mc_index;
175 __be32 mc_addr;
176 struct ip_mc_socklist __rcu *mc_list;
177 struct inet_cork_full cork;
178};
179
180#define IPCORK_OPT 1
181#define IPCORK_ALLFRAG 2
182
183static inline struct inet_sock *inet_sk(const struct sock *sk)
184{
185 return (struct inet_sock *)sk;
186}
187
188static inline void __inet_sk_copy_descendant(struct sock *sk_to,
189 const struct sock *sk_from,
190 const int ancestor_size)
191{
192 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
193 sk_from->sk_prot->obj_size - ancestor_size);
194}
195#if !(IS_ENABLED(CONFIG_IPV6))
196static inline void inet_sk_copy_descendant(struct sock *sk_to,
197 const struct sock *sk_from)
198{
199 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
200}
201#endif
202
203extern int inet_sk_rebuild_header(struct sock *sk);
204
205extern u32 inet_ehash_secret;
206extern u32 ipv6_hash_secret;
207extern void build_ehash_secret(void);
208
209static inline unsigned int inet_ehashfn(struct net *net,
210 const __be32 laddr, const __u16 lport,
211 const __be32 faddr, const __be16 fport)
212{
213 return jhash_3words((__force __u32) laddr,
214 (__force __u32) faddr,
215 ((__u32) lport) << 16 | (__force __u32)fport,
216 inet_ehash_secret + net_hash_mix(net));
217}
218
219static inline int inet_sk_ehashfn(const struct sock *sk)
220{
221 const struct inet_sock *inet = inet_sk(sk);
222 const __be32 laddr = inet->inet_rcv_saddr;
223 const __u16 lport = inet->inet_num;
224 const __be32 faddr = inet->inet_daddr;
225 const __be16 fport = inet->inet_dport;
226 struct net *net = sock_net(sk);
227
228 return inet_ehashfn(net, laddr, lport, faddr, fport);
229}
230
231static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops)
232{
233 struct request_sock *req = reqsk_alloc(ops);
234 struct inet_request_sock *ireq = inet_rsk(req);
235
236 if (req != NULL) {
237 kmemcheck_annotate_bitfield(ireq, flags);
238 ireq->opt = NULL;
239 }
240
241 return req;
242}
243
244static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
245{
246 __u8 flags = 0;
247
248 if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
249 flags |= FLOWI_FLAG_ANYSRC;
250 return flags;
251}
252
253#endif
254