xref: /freebsd/usr.sbin/bluetooth/btpand/btpand.h (revision d8a0fe102c0cfdfcd5b818f850eff09d8536c9bc)
1 /*	$NetBSD: btpand.h,v 1.1 2008/08/17 13:20:57 plunky Exp $	*/
2 
3 /*-
4  * SPDX-License-Identifier: BSD-2-Clause-NetBSD
5  *
6  * Copyright (c) 2008 Iain Hibbert
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 /* $FreeBSD$ */
31 
32 #include <sys/types.h>
33 #include <sys/queue.h>
34 #include <sys/socket.h>
35 
36 #include <net/if.h>
37 #include <net/ethernet.h>
38 
39 #include <assert.h>
40 #include <bluetooth.h>
41 #include <stdbool.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <syslog.h>
45 
46 #include "event.h"
47 
48 #ifndef __arraycount
49 #define __arraycount(__x)	(int)(sizeof((__x)) / sizeof((__x)[0]))
50 #endif
51 
52 #ifndef	L2CAP_PSM_INVALID
53 #define	L2CAP_PSM_INVALID(psm)	(((psm) & 0x0101) != 0x0001)
54 #endif
55 
56 #ifndef	L2CAP_PSM_BNEP
57 #define	L2CAP_PSM_BNEP	15
58 #endif
59 
60 typedef struct channel	channel_t;
61 typedef struct pfilter	pfilter_t;
62 typedef struct mfilter	mfilter_t;
63 typedef struct packet	packet_t;
64 typedef struct pkthdr	pkthdr_t;
65 typedef struct pktlist	pktlist_t;
66 typedef struct exthdr	exthdr_t;
67 typedef struct extlist	extlist_t;
68 
69 LIST_HEAD(chlist, channel);
70 STAILQ_HEAD(extlist, exthdr);
71 STAILQ_HEAD(pktlist, pkthdr);
72 
73 enum channel_state {
74 	CHANNEL_CLOSED,
75 	CHANNEL_WAIT_CONNECT_REQ,
76 	CHANNEL_WAIT_CONNECT_RSP,
77 	CHANNEL_OPEN,
78 };
79 
80 #define CHANNEL_MAXQLEN		128
81 
82 /* BNEP or tap channel */
83 struct channel {
84 	enum channel_state	state;
85 	bool			oactive;
86 
87 	uint8_t			laddr[ETHER_ADDR_LEN];
88 	uint8_t			raddr[ETHER_ADDR_LEN];
89 	size_t			mru;
90 	size_t			mtu;
91 
92 	int			npfilter;
93 	pfilter_t *		pfilter;
94 
95 	int			nmfilter;
96 	mfilter_t *		mfilter;
97 
98 	pktlist_t		pktlist;
99 	int			qlen;
100 
101 	int			fd;
102 	struct event		rd_ev;
103 	struct event		wr_ev;
104 	uint8_t *		sendbuf;
105 
106 	bool			(*send)(channel_t *, packet_t *);
107 	bool			(*recv)(packet_t *);
108 
109 	int			tick;
110 
111 	struct pidfh		*pfh;
112 
113 	int			refcnt;
114 	LIST_ENTRY(channel)	next;
115 };
116 
117 /* network protocol type filter */
118 struct pfilter {
119 	uint16_t	start;
120 	uint16_t	end;
121 };
122 
123 /* multicast address filter */
124 struct mfilter {
125 	uint8_t		start[ETHER_ADDR_LEN];
126 	uint8_t		end[ETHER_ADDR_LEN];
127 };
128 
129 /* packet data buffer */
130 struct packet {
131 	channel_t *		chan;	/* source channel */
132 	uint8_t *		dst;	/* dest address */
133 	uint8_t *		src;	/* source address */
134 	uint8_t *		type;	/* protocol type */
135 	uint8_t *		ptr;	/* data pointer */
136 	size_t			len;	/* data length */
137 	int			refcnt;	/* reference count */
138 	extlist_t		extlist;/* extension headers */
139 	uint8_t			buf[0];	/* data starts here */
140 };
141 
142 /* extension header */
143 struct exthdr {
144 	STAILQ_ENTRY(exthdr)	next;
145 	uint8_t *		ptr;
146 	uint8_t			len;
147 };
148 
149 /* packet header */
150 struct pkthdr {
151 	STAILQ_ENTRY(pkthdr)	next;
152 	packet_t *		data;
153 };
154 
155 /* global variables */
156 extern const char *	control_path;
157 extern const char *	service_name;
158 extern const char *	interface_name;
159 extern bdaddr_t		local_bdaddr;
160 extern bdaddr_t		remote_bdaddr;
161 extern uint16_t		l2cap_psm;
162 extern int		l2cap_mode;
163 extern uint16_t		service_class;
164 extern int		server_limit;
165 
166 /*
167  * Bluetooth addresses are stored the other way around than
168  * Ethernet addresses even though they are of the same family
169  */
170 static inline void
171 b2eaddr(void *dst, bdaddr_t *src)
172 {
173 	uint8_t *d = dst;
174 	int i;
175 
176 	for (i = 0; i < ETHER_ADDR_LEN; i++)
177 		d[i] = src->b[ETHER_ADDR_LEN - i - 1];
178 }
179 
180 #define log_err(fmt, args...)		syslog(LOG_ERR, fmt , ##args)
181 #define log_info(fmt, args...)		syslog(LOG_INFO, fmt , ##args)
182 #define log_notice(fmt, args...)	syslog(LOG_NOTICE, fmt , ##args)
183 #define log_debug(fmt, args...)		syslog(LOG_DEBUG, "%s: " fmt, __func__ , ##args)
184 
185 /* bnep.c */
186 bool		bnep_send(channel_t *, packet_t *);
187 bool		bnep_recv(packet_t *);
188 void		bnep_send_control(channel_t *, unsigned, ...);
189 
190 /* channel.c */
191 void		channel_init(void);
192 channel_t *	channel_alloc(void);
193 bool		channel_open(channel_t *, int);
194 void		channel_close(channel_t *);
195 void		channel_free(channel_t *);
196 void		channel_timeout(channel_t *, int);
197 void		channel_put(channel_t *, packet_t *);
198 
199 /* client.c */
200 void		client_init(void);
201 
202 /* packet.c */
203 packet_t *	packet_alloc(channel_t *);
204 void		packet_free(packet_t *);
205 void		packet_adj(packet_t *, size_t);
206 pkthdr_t *	pkthdr_alloc(packet_t *);
207 void		pkthdr_free(pkthdr_t *);
208 
209 /* server.c */
210 void		server_init(void);
211 void		server_update(int);
212 
213 /* tap.c */
214 void		tap_init(void);
215