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