| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | */ |
| 23 | struct pn_sock { |
| 24 | struct sock sk; |
| 25 | u16 sobject; |
| 26 | u16 dobject; |
| 27 | u8 resource; |
| 28 | }; |
| 29 | |
| 30 | static inline struct pn_sock *pn_sk(struct sock *sk) |
| 31 | { |
| 32 | return (struct pn_sock *)sk; |
| 33 | } |
| 34 | |
| 35 | extern const struct proto_ops phonet_dgram_ops; |
| 36 | |
| 37 | void pn_sock_init(void); |
| 38 | struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *sa); |
| 39 | void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb); |
| 40 | void phonet_get_local_port_range(int *min, int *max); |
| 41 | int pn_sock_hash(struct sock *sk); |
| 42 | void pn_sock_unhash(struct sock *sk); |
| 43 | int pn_sock_get_port(struct sock *sk, unsigned short sport); |
| 44 | |
| 45 | struct sock *pn_find_sock_by_res(struct net *net, u8 res); |
| 46 | int pn_sock_bind_res(struct sock *sock, u8 res); |
| 47 | int pn_sock_unbind_res(struct sock *sk, u8 res); |
| 48 | void pn_sock_unbind_all_res(struct sock *sk); |
| 49 | |
| 50 | int pn_skb_send(struct sock *sk, struct sk_buff *skb, |
| 51 | const struct sockaddr_pn *target); |
| 52 | |
| 53 | static inline struct phonethdr *pn_hdr(struct sk_buff *skb) |
| 54 | { |
| 55 | return (struct phonethdr *)skb_network_header(skb); |
| 56 | } |
| 57 | |
| 58 | static 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 | */ |
| 67 | static inline |
| 68 | void 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 | |
| 79 | static inline |
| 80 | void 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. */ |
| 92 | struct phonet_protocol { |
| 93 | const struct proto_ops *ops; |
| 94 | struct proto *prot; |
| 95 | int sock_type; |
| 96 | }; |
| 97 | |
| 98 | int phonet_proto_register(unsigned int protocol, |
| 99 | const struct phonet_protocol *pp); |
| 100 | void phonet_proto_unregister(unsigned int protocol, |
| 101 | const struct phonet_protocol *pp); |
| 102 | |
| 103 | int phonet_sysctl_init(void); |
| 104 | void phonet_sysctl_exit(void); |
| 105 | int isi_register(void); |
| 106 | void isi_unregister(void); |
| 107 | |
| 108 | #endif |