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 u8 resource; 40 }; 41 42 static inline struct pn_sock *pn_sk(struct sock *sk) 43 { 44 return (struct pn_sock *)sk; 45 } 46 47 extern const struct proto_ops phonet_dgram_ops; 48 49 struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *sa); 50 void phonet_get_local_port_range(int *min, int *max); 51 void pn_sock_hash(struct sock *sk); 52 void pn_sock_unhash(struct sock *sk); 53 int pn_sock_get_port(struct sock *sk, unsigned short sport); 54 55 int pn_skb_send(struct sock *sk, struct sk_buff *skb, 56 const struct sockaddr_pn *target); 57 58 static inline struct phonethdr *pn_hdr(struct sk_buff *skb) 59 { 60 return (struct phonethdr *)skb_network_header(skb); 61 } 62 63 static inline struct phonetmsg *pn_msg(struct sk_buff *skb) 64 { 65 return (struct phonetmsg *)skb_transport_header(skb); 66 } 67 68 /* 69 * Get the other party's sockaddr from received skb. The skb begins 70 * with a Phonet header. 71 */ 72 static inline 73 void pn_skb_get_src_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa) 74 { 75 struct phonethdr *ph = pn_hdr(skb); 76 u16 obj = pn_object(ph->pn_sdev, ph->pn_sobj); 77 78 sa->spn_family = AF_PHONET; 79 pn_sockaddr_set_object(sa, obj); 80 pn_sockaddr_set_resource(sa, ph->pn_res); 81 memset(sa->spn_zero, 0, sizeof(sa->spn_zero)); 82 } 83 84 static inline 85 void pn_skb_get_dst_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa) 86 { 87 struct phonethdr *ph = pn_hdr(skb); 88 u16 obj = pn_object(ph->pn_rdev, ph->pn_robj); 89 90 sa->spn_family = AF_PHONET; 91 pn_sockaddr_set_object(sa, obj); 92 pn_sockaddr_set_resource(sa, ph->pn_res); 93 memset(sa->spn_zero, 0, sizeof(sa->spn_zero)); 94 } 95 96 /* Protocols in Phonet protocol family. */ 97 struct phonet_protocol { 98 const struct proto_ops *ops; 99 struct proto *prot; 100 int sock_type; 101 }; 102 103 int phonet_proto_register(int protocol, struct phonet_protocol *pp); 104 void phonet_proto_unregister(int protocol, struct phonet_protocol *pp); 105 106 int phonet_sysctl_init(void); 107 void phonet_sysctl_exit(void); 108 int isi_register(void); 109 void isi_unregister(void); 110 111 #endif 112