| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
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| 4 | * operating system. INET is implemented using the BSD Socket |
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| 5 | * interface as the means of communication with the user level. |
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| 6 | * |
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| 7 | * Definitions for the RAW-IP module. |
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| 8 | * |
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| 9 | * Version: @(#)raw.h 1.0.2 05/07/93 |
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| 10 | * |
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| 11 | * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
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| 12 | */ |
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| 13 | #ifndef _RAW_H |
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| 14 | #define _RAW_H |
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| 15 | |
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| 16 | #include <net/inet_sock.h> |
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| 17 | #include <net/protocol.h> |
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| 18 | #include <net/netns/hash.h> |
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| 19 | #include <linux/hash.h> |
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| 20 | #include <linux/icmp.h> |
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| 21 | |
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| 22 | extern struct proto raw_prot; |
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| 23 | |
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| 24 | extern struct raw_hashinfo raw_v4_hashinfo; |
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| 25 | bool raw_v4_match(struct net *net, const struct sock *sk, unsigned short num, |
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| 26 | __be32 raddr, __be32 laddr, int dif, int sdif); |
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| 27 | |
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| 28 | int raw_abort(struct sock *sk, int err); |
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| 29 | void raw_icmp_error(struct sk_buff *, int, u32); |
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| 30 | int raw_local_deliver(struct sk_buff *, int); |
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| 31 | |
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| 32 | int raw_rcv(struct sock *, struct sk_buff *); |
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| 33 | |
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| 34 | #define RAW_HTABLE_LOG 8 |
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| 35 | #define RAW_HTABLE_SIZE (1U << RAW_HTABLE_LOG) |
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| 36 | |
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| 37 | struct raw_hashinfo { |
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| 38 | spinlock_t lock; |
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| 39 | |
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| 40 | struct hlist_head ht[RAW_HTABLE_SIZE] ____cacheline_aligned; |
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| 41 | }; |
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| 42 | |
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| 43 | static inline u32 raw_hashfunc(const struct net *net, u32 proto) |
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| 44 | { |
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| 45 | return hash_32(val: net_hash_mix(net) ^ proto, RAW_HTABLE_LOG); |
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| 46 | } |
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| 47 | |
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| 48 | static inline void raw_hashinfo_init(struct raw_hashinfo *hashinfo) |
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| 49 | { |
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| 50 | int i; |
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| 51 | |
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| 52 | spin_lock_init(&hashinfo->lock); |
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| 53 | for (i = 0; i < RAW_HTABLE_SIZE; i++) |
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| 54 | INIT_HLIST_HEAD(&hashinfo->ht[i]); |
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| 55 | } |
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| 56 | |
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| 57 | #ifdef CONFIG_PROC_FS |
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| 58 | int raw_proc_init(void); |
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| 59 | void raw_proc_exit(void); |
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| 60 | |
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| 61 | struct raw_iter_state { |
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| 62 | struct seq_net_private p; |
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| 63 | int bucket; |
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| 64 | }; |
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| 65 | |
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| 66 | static inline struct raw_iter_state *raw_seq_private(struct seq_file *seq) |
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| 67 | { |
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| 68 | return seq->private; |
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| 69 | } |
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| 70 | void *raw_seq_start(struct seq_file *seq, loff_t *pos); |
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| 71 | void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos); |
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| 72 | void raw_seq_stop(struct seq_file *seq, void *v); |
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| 73 | #endif |
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| 74 | |
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| 75 | int raw_hash_sk(struct sock *sk); |
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| 76 | void raw_unhash_sk(struct sock *sk); |
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| 77 | void raw_init(void); |
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| 78 | |
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| 79 | struct raw_sock { |
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| 80 | /* inet_sock has to be the first member */ |
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| 81 | struct inet_sock inet; |
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| 82 | struct icmp_filter filter; |
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| 83 | u32 ipmr_table; |
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| 84 | }; |
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| 85 | |
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| 86 | #define raw_sk(ptr) container_of_const(ptr, struct raw_sock, inet.sk) |
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| 87 | |
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| 88 | static inline bool raw_sk_bound_dev_eq(struct net *net, int bound_dev_if, |
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| 89 | int dif, int sdif) |
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| 90 | { |
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| 91 | #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) |
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| 92 | return inet_bound_dev_eq(READ_ONCE(net->ipv4.sysctl_raw_l3mdev_accept), |
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| 93 | bound_dev_if, dif, sdif); |
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| 94 | #else |
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| 95 | return inet_bound_dev_eq(true, bound_dev_if, dif, sdif); |
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| 96 | #endif |
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| 97 | } |
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| 98 | |
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| 99 | #endif /* _RAW_H */ |
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| 100 | |
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