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}; 85 86#define raw_sk(ptr) container_of_const(ptr, struct raw_sock, inet.sk) 87 88static 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