1/*	$NetBSD: btpand.h,v 1.2 2009/05/12 21:08:30 plunky Exp $	*/
2
3/*-
4 * Copyright (c) 2008-2009 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#include <sys/types.h>
29#include <sys/queue.h>
30
31#include <net/if.h>
32#include <net/if_ether.h>
33
34#include <assert.h>
35#include <bluetooth.h>
36#include <event.h>
37#include <stdbool.h>
38#include <stdlib.h>
39#include <string.h>
40#include <syslog.h>
41
42typedef struct channel	channel_t;
43typedef struct pfilter	pfilter_t;
44typedef struct mfilter	mfilter_t;
45typedef struct packet	packet_t;
46typedef struct pkthdr	pkthdr_t;
47typedef struct pktlist	pktlist_t;
48typedef struct exthdr	exthdr_t;
49typedef struct extlist	extlist_t;
50
51LIST_HEAD(chlist, channel);
52STAILQ_HEAD(extlist, exthdr);
53STAILQ_HEAD(pktlist, pkthdr);
54
55enum channel_state {
56	CHANNEL_CLOSED,
57	CHANNEL_WAIT_CONNECT_REQ,
58	CHANNEL_WAIT_CONNECT_RSP,
59	CHANNEL_OPEN,
60};
61
62#define CHANNEL_MAXQLEN		128
63
64/* BNEP or tap channel */
65struct channel {
66	enum channel_state	state;
67	bool			oactive;
68
69	uint8_t			laddr[ETHER_ADDR_LEN];
70	uint8_t			raddr[ETHER_ADDR_LEN];
71	size_t			mru;
72	size_t			mtu;
73
74	int			npfilter;
75	pfilter_t *		pfilter;
76
77	int			nmfilter;
78	mfilter_t *		mfilter;
79
80	pktlist_t		pktlist;
81	int			qlen;
82
83	int			fd;
84	struct event		rd_ev;
85	struct event		wr_ev;
86	uint8_t *		sendbuf;
87
88	bool			(*send)(channel_t *, packet_t *);
89	bool			(*recv)(packet_t *);
90	void			(*down)(channel_t *);
91
92	int			tick;
93
94	int			refcnt;
95	LIST_ENTRY(channel)	next;
96};
97
98/* network protocol type filter */
99struct pfilter {
100	uint16_t	start;
101	uint16_t	end;
102};
103
104/* multicast address filter */
105struct mfilter {
106	uint8_t		start[ETHER_ADDR_LEN];
107	uint8_t		end[ETHER_ADDR_LEN];
108};
109
110/* packet data buffer */
111struct packet {
112	channel_t *		chan;	/* source channel */
113	uint8_t *		dst;	/* dest address */
114	uint8_t *		src;	/* source address */
115	uint8_t *		type;	/* protocol type */
116	uint8_t *		ptr;	/* data pointer */
117	size_t			len;	/* data length */
118	int			refcnt;	/* reference count */
119	extlist_t		extlist;/* extension headers */
120	uint8_t			buf[0];	/* data starts here */
121};
122
123/* extension header */
124struct exthdr {
125	STAILQ_ENTRY(exthdr)	next;
126	uint8_t *		ptr;
127	uint8_t			len;
128};
129
130/* packet header */
131struct pkthdr {
132	STAILQ_ENTRY(pkthdr)	next;
133	packet_t *		data;
134};
135
136/* global variables */
137extern const char *	control_path;
138extern const char *	service_type;
139extern const char *	service_name;
140extern const char *	service_desc;
141extern const char *	interface_name;
142extern bdaddr_t		local_bdaddr;
143extern bdaddr_t		remote_bdaddr;
144extern uint16_t		l2cap_psm;
145extern int		l2cap_mode;
146extern uint16_t		service_class;
147extern int		server_limit;
148
149/*
150 * Bluetooth addresses are stored the other way around than
151 * Ethernet addresses even though they are of the same family
152 */
153static inline void
154b2eaddr(void *dst, bdaddr_t *src)
155{
156	uint8_t *d = dst;
157	int i;
158
159	for (i = 0; i < ETHER_ADDR_LEN; i++)
160		d[i] = src->b[ETHER_ADDR_LEN - i - 1];
161}
162
163#define log_err(fmt, args...)		syslog(LOG_ERR, fmt , ##args)
164#define log_info(fmt, args...)		syslog(LOG_INFO, fmt , ##args)
165#define log_notice(fmt, args...)	syslog(LOG_NOTICE, fmt , ##args)
166#define log_debug(fmt, args...)		syslog(LOG_DEBUG, "%s: " fmt, __func__ , ##args)
167
168/* bnep.c */
169bool		bnep_send(channel_t *, packet_t *);
170bool		bnep_recv(packet_t *);
171void		bnep_send_control(channel_t *, uint8_t, ...);
172
173/* channel.c */
174void		channel_init(void);
175channel_t *	channel_alloc(void);
176bool		channel_open(channel_t *, int);
177void		channel_close(channel_t *);
178void		channel_free(channel_t *);
179void		channel_timeout(channel_t *, int);
180void		channel_put(channel_t *, packet_t *);
181
182/* client.c */
183void		client_init(void);
184
185/* packet.c */
186packet_t *	packet_alloc(channel_t *);
187void		packet_free(packet_t *);
188void		packet_adj(packet_t *, size_t);
189pkthdr_t *	pkthdr_alloc(packet_t *);
190void		pkthdr_free(pkthdr_t *);
191
192/* server.c */
193void		server_init(void);
194
195/* tap.c */
196void		tap_init(void);
197