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 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 66 static inline struct phonethdr *pn_hdr(struct sk_buff *skb) 67 { 68 return (struct phonethdr *)skb_network_header(skb); 69 } 70 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 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 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, struct phonet_protocol *pp); 112 void phonet_proto_unregister(unsigned int protocol, struct phonet_protocol *pp); 113 114 int phonet_sysctl_init(void); 115 void phonet_sysctl_exit(void); 116 int isi_register(void); 117 void isi_unregister(void); 118 119 #endif 120