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, 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_nulls_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(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_NULLS_HEAD(&hashinfo->ht[i], 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 static inline struct raw_sock *raw_sk(const struct sock *sk) 87 { 88 return (struct raw_sock *)sk; 89 } 90 91 static inline bool raw_sk_bound_dev_eq(struct net *net, int bound_dev_if, 92 int dif, int sdif) 93 { 94 #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) 95 return inet_bound_dev_eq(READ_ONCE(net->ipv4.sysctl_raw_l3mdev_accept), 96 bound_dev_if, dif, sdif); 97 #else 98 return inet_bound_dev_eq(true, bound_dev_if, dif, sdif); 99 #endif 100 } 101 102 #endif /* _RAW_H */ 103