[linux-block.git] / include / net / raw.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for the RAW-IP module.
 *
 * Version:	@(#)raw.h	1.0.2	05/07/93
 *
 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 */
#ifndef _RAW_H
#define _RAW_H

#include <net/inet_sock.h>
#include <net/protocol.h>
#include <net/netns/hash.h>
#include <linux/hash.h>
#include <linux/icmp.h>

extern struct proto raw_prot;

extern struct raw_hashinfo raw_v4_hashinfo;
bool raw_v4_match(struct net *net, const struct sock *sk, unsigned short num,
		  __be32 raddr, __be32 laddr, int dif, int sdif);

int raw_abort(struct sock *sk, int err);
void raw_icmp_error(struct sk_buff *, int, u32);
int raw_local_deliver(struct sk_buff *, int);

int raw_rcv(struct sock *, struct sk_buff *);

#define RAW_HTABLE_LOG	8
#define RAW_HTABLE_SIZE	(1U << RAW_HTABLE_LOG)

struct raw_hashinfo {
	spinlock_t lock;

	struct hlist_head ht[RAW_HTABLE_SIZE] ____cacheline_aligned;
};

static inline u32 raw_hashfunc(const struct net *net, u32 proto)
{
	return hash_32(net_hash_mix(net) ^ proto, RAW_HTABLE_LOG);
}

static inline void raw_hashinfo_init(struct raw_hashinfo *hashinfo)
{
	int i;

	spin_lock_init(&hashinfo->lock);
	for (i = 0; i < RAW_HTABLE_SIZE; i++)
		INIT_HLIST_HEAD(&hashinfo->ht[i]);
}

#ifdef CONFIG_PROC_FS
int raw_proc_init(void);
void raw_proc_exit(void);

struct raw_iter_state {
	struct seq_net_private p;
	int bucket;
};

static inline struct raw_iter_state *raw_seq_private(struct seq_file *seq)
{
	return seq->private;
}
void *raw_seq_start(struct seq_file *seq, loff_t *pos);
void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos);
void raw_seq_stop(struct seq_file *seq, void *v);
#endif

int raw_hash_sk(struct sock *sk);
void raw_unhash_sk(struct sock *sk);
void raw_init(void);

struct raw_sock {
	/* inet_sock has to be the first member */
	struct inet_sock   inet;
	struct icmp_filter filter;
	u32		   ipmr_table;
};

#define raw_sk(ptr) container_of_const(ptr, struct raw_sock, inet.sk)

static inline bool raw_sk_bound_dev_eq(struct net *net, int bound_dev_if,
				       int dif, int sdif)
{
#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
	return inet_bound_dev_eq(READ_ONCE(net->ipv4.sysctl_raw_l3mdev_accept),
				 bound_dev_if, dif, sdif);
#else
	return inet_bound_dev_eq(true, bound_dev_if, dif, sdif);
#endif
}

#endif	/* _RAW_H */
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
1da177e4 LT	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>
1da177e4 LT	12	*/
	13	#ifndef _RAW_H
	14	#define _RAW_H
	15
7055420f	16	#include <net/inet_sock.h>
14c85021	17	#include <net/protocol.h>
6579f5ba ED	18	#include <net/netns/hash.h>
6579f5ba ED	19	#include <linux/hash.h>
f74e49b5	20	#include <linux/icmp.h>
14c85021	21
1da177e4 LT	22	extern struct proto raw_prot;
1da177e4 LT	23
432490f9	24	extern struct raw_hashinfo raw_v4_hashinfo;
0a8c2568	25	bool raw_v4_match(struct net net, const struct sock sk, unsigned short num,
ba44f818	26	__be32 raddr, __be32 laddr, int dif, int sdif);
432490f9 CG	27
432490f9 CG	28	int raw_abort(struct sock *sk, int err);
7bc54c90 PE	29	void raw_icmp_error(struct sk_buff *, int, u32);
7bc54c90 PE	30	int raw_local_deliver(struct sk_buff *, int);
1da177e4	31
0ad6ad94	32	int raw_rcv(struct sock , struct sk_buff );
1da177e4	33
6579f5ba ED	34	#define RAW_HTABLE_LOG 8
6579f5ba ED	35	#define RAW_HTABLE_SIZE (1U << RAW_HTABLE_LOG)
b673e4df PE	36
b673e4df PE	37	struct raw_hashinfo {
af185d8c	38	spinlock_t lock;
6579f5ba	39
0a78cf72	40	struct hlist_head ht[RAW_HTABLE_SIZE] ____cacheline_aligned;
b673e4df PE	41	};
b673e4df PE	42
6579f5ba ED	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
0daf07e5 ED	48	static inline void raw_hashinfo_init(struct raw_hashinfo *hashinfo)
	49	{
	50	int i;
	51
af185d8c	52	spin_lock_init(&hashinfo->lock);
0daf07e5	53	for (i = 0; i < RAW_HTABLE_SIZE; i++)
0a78cf72	54	INIT_HLIST_HEAD(&hashinfo->ht[i]);
0daf07e5 ED	55	}
0daf07e5 ED	56
20380731	57	#ifdef CONFIG_PROC_FS
0ad6ad94 JP	58	int raw_proc_init(void);
0ad6ad94 JP	59	void raw_proc_exit(void);
42a73808 PE	60
42a73808 PE	61	struct raw_iter_state {
f51d599f	62	struct seq_net_private p;
42a73808	63	int bucket;
42a73808 PE	64	};
42a73808 PE	65
e3634169 JP	66	static inline struct raw_iter_state raw_seq_private(struct seq_file seq)
	67	{
	68	return seq->private;
	69	}
42a73808 PE	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);
20380731 ACM	73	#endif
20380731 ACM	74
086c653f	75	int raw_hash_sk(struct sock *sk);
fc8717ba	76	void raw_unhash_sk(struct sock *sk);
6897445f	77	void raw_init(void);
65b4c50b	78
f74e49b5 PM	79	struct raw_sock {
	80	/* inet_sock has to be the first member */
	81	struct inet_sock inet;
	82	struct icmp_filter filter;
f0ad0860	83	u32 ipmr_table;
f74e49b5 PM	84	};
f74e49b5 PM	85
0a2db463	86	#define raw_sk(ptr) container_of_const(ptr, struct raw_sock, inet.sk)
f74e49b5	87
7055420f DE	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)
1dace014	92	return inet_bound_dev_eq(READ_ONCE(net->ipv4.sysctl_raw_l3mdev_accept),
7055420f DE	93	bound_dev_if, dif, sdif);
	94	#else
	95	return inet_bound_dev_eq(true, bound_dev_if, dif, sdif);
	96	#endif
	97	}
	98
1da177e4	99	#endif /* _RAW_H */