raw.h

  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
 22extern struct proto raw_prot;
 23
 24extern struct raw_hashinfo raw_v4_hashinfo;
 25bool raw_v4_match(struct net *net, const struct sock *sk, unsigned short num,
 26		  __be32 raddr, __be32 laddr, int dif, int sdif);
 27
 28int raw_abort(struct sock *sk, int err);
 29void raw_icmp_error(struct sk_buff *, int, u32);
 30int raw_local_deliver(struct sk_buff *, int);
 31
 32int raw_rcv(struct sock *, struct sk_buff *);
 33
 34#define RAW_HTABLE_LOG	8
 35#define RAW_HTABLE_SIZE	(1U << RAW_HTABLE_LOG)
 36
 37struct raw_hashinfo {
 38	spinlock_t lock;
 39
 40	struct hlist_head ht[RAW_HTABLE_SIZE] ____cacheline_aligned;
 41};
 42
 43static 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
 48static 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
 58int raw_proc_init(void);
 59void raw_proc_exit(void);
 60
 61struct raw_iter_state {
 62	struct seq_net_private p;
 63	int bucket;
 64};
 65
 66static inline struct raw_iter_state *raw_seq_private(struct seq_file *seq)
 67{
 68	return seq->private;
 69}
 70void *raw_seq_start(struct seq_file *seq, loff_t *pos);
 71void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos);
 72void raw_seq_stop(struct seq_file *seq, void *v);
 73#endif
 74
 75int raw_hash_sk(struct sock *sk);
 76void raw_unhash_sk(struct sock *sk);
 77void raw_init(void);
 78
 79struct 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	struct numa_drop_counters drop_counters;
 85};
 86
 87#define raw_sk(ptr) container_of_const(ptr, struct raw_sock, inet.sk)
 88
 89static inline bool raw_sk_bound_dev_eq(struct net *net, int bound_dev_if,
 90				       int dif, int sdif)
 91{
 92#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
 93	return inet_bound_dev_eq(READ_ONCE(net->ipv4.sysctl_raw_l3mdev_accept),
 94				 bound_dev_if, dif, sdif);
 95#else
 96	return inet_bound_dev_eq(true, bound_dev_if, dif, sdif);
 97#endif
 98}
 99
100#endif	/* _RAW_H */