linux/include/net/phonet/phonet.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * File: af_phonet.h
 *
 * Phonet sockets kernel definitions
 *
 * Copyright (C) 2008 Nokia Corporation.
 */

#ifndef AF_PHONET_H
#define AF_PHONET_H

#include <linux/phonet.h>
#include <linux/skbuff.h>
#include <net/sock.h>

/*
 * The lower layers may not require more space, ever. Make sure it's
 * enough.
 */
#define MAX_PHONET_HEADER …

/*
 * Every Phonet* socket has this structure first in its
 * protocol-specific structure under name c.
 */
struct pn_sock { … };

static inline struct pn_sock *pn_sk(struct sock *sk)
{ … }

extern const struct proto_ops phonet_dgram_ops;

void pn_sock_init(void);
struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *sa);
void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb);
void phonet_get_local_port_range(int *min, int *max);
int pn_sock_hash(struct sock *sk);
void pn_sock_unhash(struct sock *sk);
int pn_sock_get_port(struct sock *sk, unsigned short sport);

struct sock *pn_find_sock_by_res(struct net *net, u8 res);
int pn_sock_bind_res(struct sock *sock, u8 res);
int pn_sock_unbind_res(struct sock *sk, u8 res);
void pn_sock_unbind_all_res(struct sock *sk);

int pn_skb_send(struct sock *sk, struct sk_buff *skb,
		const struct sockaddr_pn *target);

static inline struct phonethdr *pn_hdr(struct sk_buff *skb)
{ … }

static inline struct phonetmsg *pn_msg(struct sk_buff *skb)
{ … }

/*
 * Get the other party's sockaddr from received skb. The skb begins
 * with a Phonet header.
 */
static inline
void pn_skb_get_src_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
{ … }

static inline
void pn_skb_get_dst_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
{ … }

/* Protocols in Phonet protocol family. */
struct phonet_protocol { … };

int phonet_proto_register(unsigned int protocol,
		const struct phonet_protocol *pp);
void phonet_proto_unregister(unsigned int protocol,
		const struct phonet_protocol *pp);

int phonet_sysctl_init(void);
void phonet_sysctl_exit(void);
int isi_register(void);
void isi_unregister(void);

static inline bool sk_is_phonet(struct sock *sk)
{ … }

static inline int phonet_sk_ioctl(struct sock *sk, unsigned int cmd,
				  void __user *arg)
{ … }
#endif