include/net/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
  22 extern struct proto raw_prot;
  23
  24 extern struct raw_hashinfo raw_v4_hashinfo;
  25 bool raw_v4_match(struct net *net, const 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_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_HEAD(&hashinfo->ht[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 #define raw_sk(ptr) container_of_const(ptr, struct raw_sock, inet.sk)
  87
  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)
  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 */