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 */
36 struct pn_sock {
37 struct sock sk;
38 u16 sobject;
39 u16 dobject;
40 u8 resource;
41 };
42
pn_sk(struct sock * sk)43 static inline struct pn_sock *pn_sk(struct sock *sk)
44 {
45 return (struct pn_sock *)sk;
46 }
47
48 extern const struct proto_ops phonet_dgram_ops;
49
50 void pn_sock_init(void);
51 struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *sa);
52 void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb);
53 void phonet_get_local_port_range(int *min, int *max);
54 int pn_sock_hash(struct sock *sk);
55 void pn_sock_unhash(struct sock *sk);
56 int pn_sock_get_port(struct sock *sk, unsigned short sport);
57
58 struct sock *pn_find_sock_by_res(struct net *net, u8 res);
59 int pn_sock_bind_res(struct sock *sock, u8 res);
60 int pn_sock_unbind_res(struct sock *sk, u8 res);
61 void pn_sock_unbind_all_res(struct sock *sk);
62
63 int pn_skb_send(struct sock *sk, struct sk_buff *skb,
64 const struct sockaddr_pn *target);
65
pn_hdr(struct sk_buff * skb)66 static inline struct phonethdr *pn_hdr(struct sk_buff *skb)
67 {
68 return (struct phonethdr *)skb_network_header(skb);
69 }
70
pn_msg(struct sk_buff * skb)71 static 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 */
80 static inline
pn_skb_get_src_sockaddr(struct sk_buff * skb,struct sockaddr_pn * sa)81 void 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
92 static inline
pn_skb_get_dst_sockaddr(struct sk_buff * skb,struct sockaddr_pn * sa)93 void 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. */
105 struct phonet_protocol {
106 const struct proto_ops *ops;
107 struct proto *prot;
108 int sock_type;
109 };
110
111 int phonet_proto_register(unsigned int protocol,
112 const struct phonet_protocol *pp);
113 void phonet_proto_unregister(unsigned int protocol,
114 const struct phonet_protocol *pp);
115
116 int phonet_sysctl_init(void);
117 void phonet_sysctl_exit(void);
118 int isi_register(void);
119 void isi_unregister(void);
120
121 #endif
122