134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* File: af_phonet.h
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*
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* Phonet sockets kernel definitions
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*
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* Copyright (C) 2008 Nokia Corporation.
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*/
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#ifndef AF_PHONET_H
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#define AF_PHONET_H
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#include <linux/phonet.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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/*
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* The lower layers may not require more space, ever. Make sure it's
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* enough.
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*/
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#define MAX_PHONET_HEADER (8 + MAX_HEADER)
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/*
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* Every Phonet* socket has this structure first in its
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* protocol-specific structure under name c.
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*/
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struct pn_sock {
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struct sock sk;
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u16 sobject;
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u16 dobject;
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u8 resource;
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};
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static inline struct pn_sock *pn_sk(struct sock *sk)
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{
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return (struct pn_sock *)sk;
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}
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extern const struct proto_ops phonet_dgram_ops;
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void pn_sock_init(void);
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struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *sa);
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void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb);
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void phonet_get_local_port_range(int *min, int *max);
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int pn_sock_hash(struct sock *sk);
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void pn_sock_unhash(struct sock *sk);
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int pn_sock_get_port(struct sock *sk, unsigned short sport);
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struct sock *pn_find_sock_by_res(struct net *net, u8 res);
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int pn_sock_bind_res(struct sock *sock, u8 res);
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int pn_sock_unbind_res(struct sock *sk, u8 res);
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void pn_sock_unbind_all_res(struct sock *sk);
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int pn_skb_send(struct sock *sk, struct sk_buff *skb,
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const struct sockaddr_pn *target);
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static inline struct phonethdr *pn_hdr(struct sk_buff *skb)
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{
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return (struct phonethdr *)skb_network_header(skb);
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}
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static inline struct phonetmsg *pn_msg(struct sk_buff *skb)
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{
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return (struct phonetmsg *)skb_transport_header(skb);
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}
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/*
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* Get the other party's sockaddr from received skb. The skb begins
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* with a Phonet header.
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*/
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static inline
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void pn_skb_get_src_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
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{
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struct phonethdr *ph = pn_hdr(skb);
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u16 obj = pn_object(ph->pn_sdev, ph->pn_sobj);
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sa->spn_family = AF_PHONET;
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pn_sockaddr_set_object(sa, obj);
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pn_sockaddr_set_resource(sa, ph->pn_res);
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memset(sa->spn_zero, 0, sizeof(sa->spn_zero));
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}
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static inline
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void pn_skb_get_dst_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
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{
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struct phonethdr *ph = pn_hdr(skb);
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u16 obj = pn_object(ph->pn_rdev, ph->pn_robj);
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sa->spn_family = AF_PHONET;
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pn_sockaddr_set_object(sa, obj);
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pn_sockaddr_set_resource(sa, ph->pn_res);
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memset(sa->spn_zero, 0, sizeof(sa->spn_zero));
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}
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/* Protocols in Phonet protocol family. */
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struct phonet_protocol {
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const struct proto_ops *ops;
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struct proto *prot;
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int sock_type;
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};
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int phonet_proto_register(unsigned int protocol,
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const struct phonet_protocol *pp);
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void phonet_proto_unregister(unsigned int protocol,
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const struct phonet_protocol *pp);
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int phonet_sysctl_init(void);
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void phonet_sysctl_exit(void);
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int isi_register(void);
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void isi_unregister(void);
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static inline bool sk_is_phonet(struct sock *sk)
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{
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return sk->sk_family == PF_PHONET;
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}
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static inline int phonet_sk_ioctl(struct sock *sk, unsigned int cmd,
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void __user *arg)
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{
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int karg;
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switch (cmd) {
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case SIOCPNADDRESOURCE:
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case SIOCPNDELRESOURCE:
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if (get_user(karg, (int __user *)arg))
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return -EFAULT;
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return sk->sk_prot->ioctl(sk, cmd, &karg);
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}
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/* A positive return value means that the ioctl was not processed */
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return 1;
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}
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#endif
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