xref: /linux-6.15/include/linux/phonet.h (revision fd589a8f)
1 /**
2  * file phonet.h
3  *
4  * Phonet sockets kernel interface
5  *
6  * Copyright (C) 2008 Nokia Corporation. All rights reserved.
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 LINUX_PHONET_H
24 #define LINUX_PHONET_H
25 
26 #include <linux/types.h>
27 
28 /* Automatic protocol selection */
29 #define PN_PROTO_TRANSPORT	0
30 /* Phonet datagram socket */
31 #define PN_PROTO_PHONET		1
32 /* Phonet pipe */
33 #define PN_PROTO_PIPE		2
34 #define PHONET_NPROTO		3
35 
36 /* Socket options for SOL_PNPIPE level */
37 #define PNPIPE_ENCAP		1
38 #define PNPIPE_IFINDEX		2
39 
40 #define PNADDR_ANY		0
41 #define PNPORT_RESOURCE_ROUTING	0
42 
43 /* Values for PNPIPE_ENCAP option */
44 #define PNPIPE_ENCAP_NONE	0
45 #define PNPIPE_ENCAP_IP		1
46 
47 /* ioctls */
48 #define SIOCPNGETOBJECT		(SIOCPROTOPRIVATE + 0)
49 
50 /* Phonet protocol header */
51 struct phonethdr {
52 	__u8	pn_rdev;
53 	__u8	pn_sdev;
54 	__u8	pn_res;
55 	__be16	pn_length;
56 	__u8	pn_robj;
57 	__u8	pn_sobj;
58 } __attribute__((packed));
59 
60 /* Common Phonet payload header */
61 struct phonetmsg {
62 	__u8	pn_trans_id;	/* transaction ID */
63 	__u8	pn_msg_id;	/* message type */
64 	union {
65 		struct {
66 			__u8	pn_submsg_id;	/* message subtype */
67 			__u8	pn_data[5];
68 		} base;
69 		struct {
70 			__u16	pn_e_res_id;	/* extended resource ID */
71 			__u8	pn_e_submsg_id;	/* message subtype */
72 			__u8	pn_e_data[3];
73 		} ext;
74 	} pn_msg_u;
75 };
76 #define PN_COMMON_MESSAGE	0xF0
77 #define PN_COMMGR		0x10
78 #define PN_PREFIX		0xE0 /* resource for extended messages */
79 #define pn_submsg_id		pn_msg_u.base.pn_submsg_id
80 #define pn_e_submsg_id		pn_msg_u.ext.pn_e_submsg_id
81 #define pn_e_res_id		pn_msg_u.ext.pn_e_res_id
82 #define pn_data			pn_msg_u.base.pn_data
83 #define pn_e_data		pn_msg_u.ext.pn_e_data
84 
85 /* data for unreachable errors */
86 #define PN_COMM_SERVICE_NOT_IDENTIFIED_RESP	0x01
87 #define PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP	0x14
88 #define pn_orig_msg_id		pn_data[0]
89 #define pn_status		pn_data[1]
90 #define pn_e_orig_msg_id	pn_e_data[0]
91 #define pn_e_status		pn_e_data[1]
92 
93 /* Phonet socket address structure */
94 struct sockaddr_pn {
95 	sa_family_t spn_family;
96 	__u8 spn_obj;
97 	__u8 spn_dev;
98 	__u8 spn_resource;
99 	__u8 spn_zero[sizeof(struct sockaddr) - sizeof(sa_family_t) - 3];
100 } __attribute__ ((packed));
101 
102 /* Well known address */
103 #define PN_DEV_PC	0x10
104 
105 static inline __u16 pn_object(__u8 addr, __u16 port)
106 {
107 	return (addr << 8) | (port & 0x3ff);
108 }
109 
110 static inline __u8 pn_obj(__u16 handle)
111 {
112 	return handle & 0xff;
113 }
114 
115 static inline __u8 pn_dev(__u16 handle)
116 {
117 	return handle >> 8;
118 }
119 
120 static inline __u16 pn_port(__u16 handle)
121 {
122 	return handle & 0x3ff;
123 }
124 
125 static inline __u8 pn_addr(__u16 handle)
126 {
127 	return (handle >> 8) & 0xfc;
128 }
129 
130 static inline void pn_sockaddr_set_addr(struct sockaddr_pn *spn, __u8 addr)
131 {
132 	spn->spn_dev &= 0x03;
133 	spn->spn_dev |= addr & 0xfc;
134 }
135 
136 static inline void pn_sockaddr_set_port(struct sockaddr_pn *spn, __u16 port)
137 {
138 	spn->spn_dev &= 0xfc;
139 	spn->spn_dev |= (port >> 8) & 0x03;
140 	spn->spn_obj = port & 0xff;
141 }
142 
143 static inline void pn_sockaddr_set_object(struct sockaddr_pn *spn,
144 						__u16 handle)
145 {
146 	spn->spn_dev = pn_dev(handle);
147 	spn->spn_obj = pn_obj(handle);
148 }
149 
150 static inline void pn_sockaddr_set_resource(struct sockaddr_pn *spn,
151 						__u8 resource)
152 {
153 	spn->spn_resource = resource;
154 }
155 
156 static inline __u8 pn_sockaddr_get_addr(const struct sockaddr_pn *spn)
157 {
158 	return spn->spn_dev & 0xfc;
159 }
160 
161 static inline __u16 pn_sockaddr_get_port(const struct sockaddr_pn *spn)
162 {
163 	return ((spn->spn_dev & 0x03) << 8) | spn->spn_obj;
164 }
165 
166 static inline __u16 pn_sockaddr_get_object(const struct sockaddr_pn *spn)
167 {
168 	return pn_object(spn->spn_dev, spn->spn_obj);
169 }
170 
171 static inline __u8 pn_sockaddr_get_resource(const struct sockaddr_pn *spn)
172 {
173 	return spn->spn_resource;
174 }
175 
176 /* Phonet device ioctl requests */
177 #ifdef __KERNEL__
178 #define SIOCPNGAUTOCONF		(SIOCDEVPRIVATE + 0)
179 
180 struct if_phonet_autoconf {
181 	uint8_t device;
182 };
183 
184 struct if_phonet_req {
185 	char ifr_phonet_name[16];
186 	union {
187 		struct if_phonet_autoconf ifru_phonet_autoconf;
188 	} ifr_ifru;
189 };
190 #define ifr_phonet_autoconf ifr_ifru.ifru_phonet_autoconf
191 #endif /* __KERNEL__ */
192 
193 #endif
194