LXR linux/include/net/phonet/phonet.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * File: af_phonet.h
   4 *
   5 * Phonet sockets kernel definitions
   6 *
   7 * Copyright (C) 2008 Nokia Corporation.
   8 */
   9
  10#ifndef AF_PHONET_H
  11#define AF_PHONET_H
  12
  13/*
  14 * The lower layers may not require more space, ever. Make sure it's
  15 * enough.
  16 */
  17#define MAX_PHONET_HEADER       (8 + MAX_HEADER)
  18
  19/*
  20 * Every Phonet* socket has this structure first in its
  21 * protocol-specific structure under name c.
  22 */
  23struct pn_sock {
  24        struct sock     sk;
  25        u16             sobject;
  26        u16             dobject;
  27        u8              resource;
  28};
  29
  30static inline struct pn_sock *pn_sk(struct sock *sk)
  31{
  32        return (struct pn_sock *)sk;
  33}
  34
  35extern const struct proto_ops phonet_dgram_ops;
  36
  37void pn_sock_init(void);
  38struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *sa);
  39void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb);
  40void phonet_get_local_port_range(int *min, int *max);
  41int pn_sock_hash(struct sock *sk);
  42void pn_sock_unhash(struct sock *sk);
  43int pn_sock_get_port(struct sock *sk, unsigned short sport);
  44
  45struct sock *pn_find_sock_by_res(struct net *net, u8 res);
  46int pn_sock_bind_res(struct sock *sock, u8 res);
  47int pn_sock_unbind_res(struct sock *sk, u8 res);
  48void pn_sock_unbind_all_res(struct sock *sk);
  49
  50int pn_skb_send(struct sock *sk, struct sk_buff *skb,
  51                const struct sockaddr_pn *target);
  52
  53static inline struct phonethdr *pn_hdr(struct sk_buff *skb)
  54{
  55        return (struct phonethdr *)skb_network_header(skb);
  56}
  57
  58static inline struct phonetmsg *pn_msg(struct sk_buff *skb)
  59{
  60        return (struct phonetmsg *)skb_transport_header(skb);
  61}
  62
  63/*
  64 * Get the other party's sockaddr from received skb. The skb begins
  65 * with a Phonet header.
  66 */
  67static inline
  68void pn_skb_get_src_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
  69{
  70        struct phonethdr *ph = pn_hdr(skb);
  71        u16 obj = pn_object(ph->pn_sdev, ph->pn_sobj);
  72
  73        sa->spn_family = AF_PHONET;
  74        pn_sockaddr_set_object(sa, obj);
  75        pn_sockaddr_set_resource(sa, ph->pn_res);
  76        memset(sa->spn_zero, 0, sizeof(sa->spn_zero));
  77}
  78
  79static inline
  80void pn_skb_get_dst_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
  81{
  82        struct phonethdr *ph = pn_hdr(skb);
  83        u16 obj = pn_object(ph->pn_rdev, ph->pn_robj);
  84
  85        sa->spn_family = AF_PHONET;
  86        pn_sockaddr_set_object(sa, obj);
  87        pn_sockaddr_set_resource(sa, ph->pn_res);
  88        memset(sa->spn_zero, 0, sizeof(sa->spn_zero));
  89}
  90
  91/* Protocols in Phonet protocol family. */
  92struct phonet_protocol {
  93        const struct proto_ops  *ops;
  94        struct proto            *prot;
  95        int                     sock_type;
  96};
  97
  98int phonet_proto_register(unsigned int protocol,
  99                const struct phonet_protocol *pp);
 100void phonet_proto_unregister(unsigned int protocol,
 101                const struct phonet_protocol *pp);
 102
 103int phonet_sysctl_init(void);
 104void phonet_sysctl_exit(void);
 105int isi_register(void);
 106void isi_unregister(void);
 107
 108#endif
 109