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
60typedef struct channel	channel_t;
61typedef struct pfilter	pfilter_t;
62typedef struct mfilter	mfilter_t;
63typedef struct packet	packet_t;
64typedef struct pkthdr	pkthdr_t;
65typedef struct pktlist	pktlist_t;
66typedef struct exthdr	exthdr_t;
67typedef struct extlist	extlist_t;
68
69LIST_HEAD(chlist, channel);
70STAILQ_HEAD(extlist, exthdr);
71STAILQ_HEAD(pktlist, pkthdr);
72
73enum 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 */
83struct 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 */
118struct pfilter {
119	uint16_t	start;
120	uint16_t	end;
121};
122
123/* multicast address filter */
124struct mfilter {
125	uint8_t		start[ETHER_ADDR_LEN];
126	uint8_t		end[ETHER_ADDR_LEN];
127};
128
129/* packet data buffer */
130struct 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 */
143struct exthdr {
144	STAILQ_ENTRY(exthdr)	next;
145	uint8_t *		ptr;
146	uint8_t			len;
147};
148
149/* packet header */
150struct pkthdr {
151	STAILQ_ENTRY(pkthdr)	next;
152	packet_t *		data;
153};
154
155/* global variables */
156extern const char *	control_path;
157extern const char *	service_name;
158extern const char *	interface_name;
159extern bdaddr_t		local_bdaddr;
160extern bdaddr_t		remote_bdaddr;
161extern uint16_t		l2cap_psm;
162extern int		l2cap_mode;
163extern uint16_t		service_class;
164extern 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 */
170static inline void
171b2eaddr(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 */
186bool		bnep_send(channel_t *, packet_t *);
187bool		bnep_recv(packet_t *);
188void		bnep_send_control(channel_t *, unsigned, ...);
189
190/* channel.c */
191void		channel_init(void);
192channel_t *	channel_alloc(void);
193bool		channel_open(channel_t *, int);
194void		channel_close(channel_t *);
195void		channel_free(channel_t *);
196void		channel_timeout(channel_t *, int);
197void		channel_put(channel_t *, packet_t *);
198
199/* client.c */
200void		client_init(void);
201
202/* packet.c */
203packet_t *	packet_alloc(channel_t *);
204void		packet_free(packet_t *);
205void		packet_adj(packet_t *, size_t);
206pkthdr_t *	pkthdr_alloc(packet_t *);
207void		pkthdr_free(pkthdr_t *);
208
209/* server.c */
210void		server_init(void);
211void		server_update(int);
212
213/* tap.c */
214void		tap_init(void);
215