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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>
30
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41
42struct ip_options {
43 __be32 faddr;
44 __be32 nexthop;
45 unsigned char optlen;
46 unsigned char srr;
47 unsigned char rr;
48 unsigned char ts;
49 unsigned char is_strictroute:1,
50 srr_is_hit:1,
51 is_changed:1,
52 rr_needaddr:1,
53 ts_needtime:1,
54 ts_needaddr:1;
55 unsigned char router_alert;
56 unsigned char cipso;
57 unsigned char __pad2;
58 unsigned char __data[0];
59};
60
61struct ip_options_rcu {
62 struct rcu_head rcu;
63 struct ip_options opt;
64};
65
66struct ip_options_data {
67 struct ip_options_rcu opt;
68 char data[40];
69};
70
71struct inet_request_sock {
72 struct request_sock req;
73#if IS_ENABLED(CONFIG_IPV6)
74 u16 inet6_rsk_offset;
75#endif
76 __be16 loc_port;
77 __be32 loc_addr;
78 __be32 rmt_addr;
79 __be16 rmt_port;
80 kmemcheck_bitfield_begin(flags);
81 u16 snd_wscale : 4,
82 rcv_wscale : 4,
83 tstamp_ok : 1,
84 sack_ok : 1,
85 wscale_ok : 1,
86 ecn_ok : 1,
87 acked : 1,
88 no_srccheck: 1;
89 kmemcheck_bitfield_end(flags);
90 struct ip_options_rcu *opt;
91};
92
93static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
94{
95 return (struct inet_request_sock *)sk;
96}
97
98struct inet_cork {
99 unsigned int flags;
100 __be32 addr;
101 struct ip_options *opt;
102 unsigned int fragsize;
103 int length;
104 struct dst_entry *dst;
105 u8 tx_flags;
106};
107
108struct inet_cork_full {
109 struct inet_cork base;
110 struct flowi fl;
111};
112
113struct ip_mc_socklist;
114struct ipv6_pinfo;
115struct rtable;
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136
137struct inet_sock {
138
139 struct sock sk;
140#if IS_ENABLED(CONFIG_IPV6)
141 struct ipv6_pinfo *pinet6;
142#endif
143
144#define inet_daddr sk.__sk_common.skc_daddr
145#define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr
146#define inet_addrpair sk.__sk_common.skc_addrpair
147#define inet_dport sk.__sk_common.skc_dport
148#define inet_num sk.__sk_common.skc_num
149#define inet_portpair sk.__sk_common.skc_portpair
150
151 __be32 inet_saddr;
152 __s16 uc_ttl;
153 __u16 cmsg_flags;
154 __be16 inet_sport;
155 __u16 inet_id;
156
157 struct ip_options_rcu __rcu *inet_opt;
158 int rx_dst_ifindex;
159 __u8 tos;
160 __u8 min_ttl;
161 __u8 mc_ttl;
162 __u8 pmtudisc;
163 __u8 recverr:1,
164 is_icsk:1,
165 freebind:1,
166 hdrincl:1,
167 mc_loop:1,
168 transparent:1,
169 mc_all:1,
170 nodefrag:1;
171 __u8 rcv_tos;
172 int uc_index;
173 int mc_index;
174 __be32 mc_addr;
175 struct ip_mc_socklist __rcu *mc_list;
176 struct inet_cork_full cork;
177};
178
179#define IPCORK_OPT 1
180#define IPCORK_ALLFRAG 2
181
182static inline struct inet_sock *inet_sk(const struct sock *sk)
183{
184 return (struct inet_sock *)sk;
185}
186
187static inline void __inet_sk_copy_descendant(struct sock *sk_to,
188 const struct sock *sk_from,
189 const int ancestor_size)
190{
191 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
192 sk_from->sk_prot->obj_size - ancestor_size);
193}
194#if !(IS_ENABLED(CONFIG_IPV6))
195static inline void inet_sk_copy_descendant(struct sock *sk_to,
196 const struct sock *sk_from)
197{
198 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
199}
200#endif
201
202extern int inet_sk_rebuild_header(struct sock *sk);
203
204extern u32 inet_ehash_secret;
205extern u32 ipv6_hash_secret;
206extern void build_ehash_secret(void);
207
208static inline unsigned int inet_ehashfn(struct net *net,
209 const __be32 laddr, const __u16 lport,
210 const __be32 faddr, const __be16 fport)
211{
212 return jhash_3words((__force __u32) laddr,
213 (__force __u32) faddr,
214 ((__u32) lport) << 16 | (__force __u32)fport,
215 inet_ehash_secret + net_hash_mix(net));
216}
217
218static inline int inet_sk_ehashfn(const struct sock *sk)
219{
220 const struct inet_sock *inet = inet_sk(sk);
221 const __be32 laddr = inet->inet_rcv_saddr;
222 const __u16 lport = inet->inet_num;
223 const __be32 faddr = inet->inet_daddr;
224 const __be16 fport = inet->inet_dport;
225 struct net *net = sock_net(sk);
226
227 return inet_ehashfn(net, laddr, lport, faddr, fport);
228}
229
230static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops)
231{
232 struct request_sock *req = reqsk_alloc(ops);
233 struct inet_request_sock *ireq = inet_rsk(req);
234
235 if (req != NULL) {
236 kmemcheck_annotate_bitfield(ireq, flags);
237 ireq->opt = NULL;
238 }
239
240 return req;
241}
242
243static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
244{
245 __u8 flags = 0;
246
247 if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
248 flags |= FLOWI_FLAG_ANYSRC;
249 return flags;
250}
251
252#endif
253