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

   1/*
   2 * File: af_phonet.h
   3 *
   4 * Phonet sockets kernel definitions
   5 *
   6 * Copyright (C) 2008 Nokia Corporation.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License
  10 * version 2 as published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful, but
  13 * WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 * General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20 * 02110-1301 USA
  21 */
  22
  23#ifndef AF_PHONET_H
  24#define AF_PHONET_H
  25
  26/*
  27 * The lower layers may not require more space, ever. Make sure it's
  28 * enough.
  29 */
  30#define MAX_PHONET_HEADER       (8 + MAX_HEADER)
  31
  32/*
  33 * Every Phonet* socket has this structure first in its
  34 * protocol-specific structure under name c.
  35 */
  36struct pn_sock {
  37        struct sock     sk;
  38        u16             sobject;
  39        u16             dobject;
  40        u8              resource;
  41};
  42
  43static inline struct pn_sock *pn_sk(struct sock *sk)
  44{
  45        return (struct pn_sock *)sk;
  46}
  47
  48extern const struct proto_ops phonet_dgram_ops;
  49
  50void pn_sock_init(void);
  51struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *sa);
  52void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb);
  53void phonet_get_local_port_range(int *min, int *max);
  54void pn_sock_hash(struct sock *sk);
  55void pn_sock_unhash(struct sock *sk);
  56int pn_sock_get_port(struct sock *sk, unsigned short sport);
  57
  58struct sock *pn_find_sock_by_res(struct net *net, u8 res);
  59int pn_sock_bind_res(struct sock *sock, u8 res);
  60int pn_sock_unbind_res(struct sock *sk, u8 res);
  61void pn_sock_unbind_all_res(struct sock *sk);
  62
  63int pn_skb_send(struct sock *sk, struct sk_buff *skb,
  64                const struct sockaddr_pn *target);
  65
  66static inline struct phonethdr *pn_hdr(struct sk_buff *skb)
  67{
  68        return (struct phonethdr *)skb_network_header(skb);
  69}
  70
  71static inline struct phonetmsg *pn_msg(struct sk_buff *skb)
  72{
  73        return (struct phonetmsg *)skb_transport_header(skb);
  74}
  75
  76/*
  77 * Get the other party's sockaddr from received skb. The skb begins
  78 * with a Phonet header.
  79 */
  80static inline
  81void pn_skb_get_src_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
  82{
  83        struct phonethdr *ph = pn_hdr(skb);
  84        u16 obj = pn_object(ph->pn_sdev, ph->pn_sobj);
  85
  86        sa->spn_family = AF_PHONET;
  87        pn_sockaddr_set_object(sa, obj);
  88        pn_sockaddr_set_resource(sa, ph->pn_res);
  89        memset(sa->spn_zero, 0, sizeof(sa->spn_zero));
  90}
  91
  92static inline
  93void pn_skb_get_dst_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa)
  94{
  95        struct phonethdr *ph = pn_hdr(skb);
  96        u16 obj = pn_object(ph->pn_rdev, ph->pn_robj);
  97
  98        sa->spn_family = AF_PHONET;
  99        pn_sockaddr_set_object(sa, obj);
 100        pn_sockaddr_set_resource(sa, ph->pn_res);
 101        memset(sa->spn_zero, 0, sizeof(sa->spn_zero));
 102}
 103
 104/* Protocols in Phonet protocol family. */
 105struct phonet_protocol {
 106        const struct proto_ops  *ops;
 107        struct proto            *prot;
 108        int                     sock_type;
 109};
 110
 111int phonet_proto_register(unsigned int protocol, struct phonet_protocol *pp);
 112void phonet_proto_unregister(unsigned int protocol, struct phonet_protocol *pp);
 113
 114int phonet_sysctl_init(void);
 115void phonet_sysctl_exit(void);
 116int isi_register(void);
 117void isi_unregister(void);
 118
 119#endif
 120