1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Definitions for the RAW-IP module.
8 *
9 * Version: @(#)raw.h 1.0.2 05/07/93
10 *
11 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 */
13 #ifndef _RAW_H
14 #define _RAW_H
15
16 #include <net/inet_sock.h>
17 #include <net/protocol.h>
18 #include <net/netns/hash.h>
19 #include <linux/hash.h>
20 #include <linux/icmp.h>
21
22 extern struct proto raw_prot;
23
24 extern struct raw_hashinfo raw_v4_hashinfo;
25 bool raw_v4_match(struct net *net, const struct sock *sk, unsigned short num,
26 __be32 raddr, __be32 laddr, int dif, int sdif);
27
28 int raw_abort(struct sock *sk, int err);
29 void raw_icmp_error(struct sk_buff *, int, u32);
30 int raw_local_deliver(struct sk_buff *, int);
31
32 int raw_rcv(struct sock *, struct sk_buff *);
33
34 #define RAW_HTABLE_LOG 8
35 #define RAW_HTABLE_SIZE (1U << RAW_HTABLE_LOG)
36
37 struct raw_hashinfo {
38 spinlock_t lock;
39
40 struct hlist_head ht[RAW_HTABLE_SIZE] ____cacheline_aligned;
41 };
42
43 static inline u32 raw_hashfunc(const struct net *net, u32 proto)
44 {
45 return hash_32(net_hash_mix(net) ^ proto, RAW_HTABLE_LOG);
46 }
47
48 static inline void raw_hashinfo_init(struct raw_hashinfo *hashinfo)
49 {
50 int i;
51
52 spin_lock_init(&hashinfo->lock);
53 for (i = 0; i < RAW_HTABLE_SIZE; i++)
54 INIT_HLIST_HEAD(&hashinfo->ht[i]);
55 }
56
57 #ifdef CONFIG_PROC_FS
58 int raw_proc_init(void);
59 void raw_proc_exit(void);
60
61 struct raw_iter_state {
62 struct seq_net_private p;
63 int bucket;
64 };
65
66 static inline struct raw_iter_state *raw_seq_private(struct seq_file *seq)
67 {
68 return seq->private;
69 }
70 void *raw_seq_start(struct seq_file *seq, loff_t *pos);
71 void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos);
72 void raw_seq_stop(struct seq_file *seq, void *v);
73 #endif
74
75 int raw_hash_sk(struct sock *sk);
76 void raw_unhash_sk(struct sock *sk);
77 void raw_init(void);
78
79 struct raw_sock {
80 /* inet_sock has to be the first member */
81 struct inet_sock inet;
82 struct icmp_filter filter;
83 u32 ipmr_table;
84 };
85
86 #define raw_sk(ptr) container_of_const(ptr, struct raw_sock, inet.sk)
87
88 static inline bool raw_sk_bound_dev_eq(struct net *net, int bound_dev_if,
89 int dif, int sdif)
90 {
91 #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
92 return inet_bound_dev_eq(READ_ONCE(net->ipv4.sysctl_raw_l3mdev_accept),
93 bound_dev_if, dif, sdif);
94 #else
95 return inet_bound_dev_eq(true, bound_dev_if, dif, sdif);
96 #endif
97 }
98
99 #endif /* _RAW_H */
100
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