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(val: 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 | |