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 <linux/icmp.h>
19 
20 extern struct proto raw_prot;
21 
22 extern struct raw_hashinfo raw_v4_hashinfo;
23 struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
24 			     unsigned short num, __be32 raddr,
25 			     __be32 laddr, int dif, int sdif);
26 
27 int raw_abort(struct sock *sk, int err);
28 void raw_icmp_error(struct sk_buff *, int, u32);
29 int raw_local_deliver(struct sk_buff *, int);
30 
31 int raw_rcv(struct sock *, struct sk_buff *);
32 
33 #define RAW_HTABLE_SIZE	MAX_INET_PROTOS
34 
35 struct raw_hashinfo {
36 	rwlock_t lock;
37 	struct hlist_head ht[RAW_HTABLE_SIZE];
38 };
39 
40 #ifdef CONFIG_PROC_FS
41 int raw_proc_init(void);
42 void raw_proc_exit(void);
43 
44 struct raw_iter_state {
45 	struct seq_net_private p;
46 	int bucket;
47 };
48 
raw_seq_private(struct seq_file * seq)49 static inline struct raw_iter_state *raw_seq_private(struct seq_file *seq)
50 {
51 	return seq->private;
52 }
53 void *raw_seq_start(struct seq_file *seq, loff_t *pos);
54 void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos);
55 void raw_seq_stop(struct seq_file *seq, void *v);
56 #endif
57 
58 int raw_hash_sk(struct sock *sk);
59 void raw_unhash_sk(struct sock *sk);
60 void raw_init(void);
61 
62 struct raw_sock {
63 	/* inet_sock has to be the first member */
64 	struct inet_sock   inet;
65 	struct icmp_filter filter;
66 	u32		   ipmr_table;
67 };
68 
raw_sk(const struct sock * sk)69 static inline struct raw_sock *raw_sk(const struct sock *sk)
70 {
71 	return (struct raw_sock *)sk;
72 }
73 
raw_sk_bound_dev_eq(struct net * net,int bound_dev_if,int dif,int sdif)74 static inline bool raw_sk_bound_dev_eq(struct net *net, int bound_dev_if,
75 				       int dif, int sdif)
76 {
77 #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
78 	return inet_bound_dev_eq(!!net->ipv4.sysctl_raw_l3mdev_accept,
79 				 bound_dev_if, dif, sdif);
80 #else
81 	return inet_bound_dev_eq(true, bound_dev_if, dif, sdif);
82 #endif
83 }
84 
85 #endif	/* _RAW_H */
86