1/*	$NetBSD: btpand.h,v 1.1 2008/08/17 13:20:57 plunky Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-2-Clause
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
31#include <sys/types.h>
32#include <sys/queue.h>
33#include <sys/socket.h>
34
35#include <net/if.h>
36#include <net/ethernet.h>
37
38#include <assert.h>
39#include <bluetooth.h>
40#include <stdbool.h>
41#include <stdlib.h>
42#include <string.h>
43#include <syslog.h>
44
45#include "event.h"
46
47#ifndef __arraycount
48#define __arraycount(__x)	(int)(sizeof((__x)) / sizeof((__x)[0]))
49#endif
50
51#ifndef	L2CAP_PSM_INVALID
52#define	L2CAP_PSM_INVALID(psm)	(((psm) & 0x0101) != 0x0001)
53#endif
54
55#ifndef	L2CAP_PSM_BNEP
56#define	L2CAP_PSM_BNEP	15
57#endif
58
59typedef struct channel	channel_t;
60typedef struct pfilter	pfilter_t;
61typedef struct mfilter	mfilter_t;
62typedef struct packet	packet_t;
63typedef struct pkthdr	pkthdr_t;
64typedef struct pktlist	pktlist_t;
65typedef struct exthdr	exthdr_t;
66typedef struct extlist	extlist_t;
67
68LIST_HEAD(chlist, channel);
69STAILQ_HEAD(extlist, exthdr);
70STAILQ_HEAD(pktlist, pkthdr);
71
72enum channel_state {
73	CHANNEL_CLOSED,
74	CHANNEL_WAIT_CONNECT_REQ,
75	CHANNEL_WAIT_CONNECT_RSP,
76	CHANNEL_OPEN,
77};
78
79#define CHANNEL_MAXQLEN		128
80
81/* BNEP or tap channel */
82struct channel {
83	enum channel_state	state;
84	bool			oactive;
85
86	uint8_t			laddr[ETHER_ADDR_LEN];
87	uint8_t			raddr[ETHER_ADDR_LEN];
88	size_t			mru;
89	size_t			mtu;
90
91	int			npfilter;
92	pfilter_t *		pfilter;
93
94	int			nmfilter;
95	mfilter_t *		mfilter;
96
97	pktlist_t		pktlist;
98	int			qlen;
99
100	int			fd;
101	struct event		rd_ev;
102	struct event		wr_ev;
103	uint8_t *		sendbuf;
104
105	bool			(*send)(channel_t *, packet_t *);
106	bool			(*recv)(packet_t *);
107
108	int			tick;
109
110	struct pidfh		*pfh;
111
112	int			refcnt;
113	LIST_ENTRY(channel)	next;
114};
115
116/* network protocol type filter */
117struct pfilter {
118	uint16_t	start;
119	uint16_t	end;
120};
121
122/* multicast address filter */
123struct mfilter {
124	uint8_t		start[ETHER_ADDR_LEN];
125	uint8_t		end[ETHER_ADDR_LEN];
126};
127
128/* packet data buffer */
129struct packet {
130	channel_t *		chan;	/* source channel */
131	uint8_t *		dst;	/* dest address */
132	uint8_t *		src;	/* source address */
133	uint8_t *		type;	/* protocol type */
134	uint8_t *		ptr;	/* data pointer */
135	size_t			len;	/* data length */
136	int			refcnt;	/* reference count */
137	extlist_t		extlist;/* extension headers */
138	uint8_t			buf[0];	/* data starts here */
139};
140
141/* extension header */
142struct exthdr {
143	STAILQ_ENTRY(exthdr)	next;
144	uint8_t *		ptr;
145	uint8_t			len;
146};
147
148/* packet header */
149struct pkthdr {
150	STAILQ_ENTRY(pkthdr)	next;
151	packet_t *		data;
152};
153
154/* global variables */
155extern const char *	control_path;
156extern const char *	service_name;
157extern const char *	interface_name;
158extern bdaddr_t		local_bdaddr;
159extern bdaddr_t		remote_bdaddr;
160extern uint16_t		l2cap_psm;
161extern int		l2cap_mode;
162extern uint16_t		service_class;
163extern int		server_limit;
164
165/*
166 * Bluetooth addresses are stored the other way around than
167 * Ethernet addresses even though they are of the same family
168 */
169static inline void
170b2eaddr(void *dst, bdaddr_t *src)
171{
172	uint8_t *d = dst;
173	int i;
174
175	for (i = 0; i < ETHER_ADDR_LEN; i++)
176		d[i] = src->b[ETHER_ADDR_LEN - i - 1];
177}
178
179#define log_err(fmt, args...)		syslog(LOG_ERR, fmt , ##args)
180#define log_info(fmt, args...)		syslog(LOG_INFO, fmt , ##args)
181#define log_notice(fmt, args...)	syslog(LOG_NOTICE, fmt , ##args)
182#define log_debug(fmt, args...)		syslog(LOG_DEBUG, "%s: " fmt, __func__ , ##args)
183
184/* bnep.c */
185bool		bnep_send(channel_t *, packet_t *);
186bool		bnep_recv(packet_t *);
187void		bnep_send_control(channel_t *, unsigned, ...);
188
189/* channel.c */
190void		channel_init(void);
191channel_t *	channel_alloc(void);
192bool		channel_open(channel_t *, int);
193void		channel_close(channel_t *);
194void		channel_free(channel_t *);
195void		channel_timeout(channel_t *, int);
196void		channel_put(channel_t *, packet_t *);
197
198/* client.c */
199void		client_init(void);
200
201/* packet.c */
202packet_t *	packet_alloc(channel_t *);
203void		packet_free(packet_t *);
204void		packet_adj(packet_t *, size_t);
205pkthdr_t *	pkthdr_alloc(packet_t *);
206void		pkthdr_free(pkthdr_t *);
207
208/* server.c */
209void		server_init(void);
210void		server_update(int);
211
212/* tap.c */
213void		tap_init(void);
214