ng_l2cap_var.h revision 128076 
1/*
2 * ng_l2cap_var.h
3 *
4 * Copyright (c) 2001 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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 AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $Id: ng_l2cap_var.h,v 1.2 2003/04/28 21:44:59 max Exp $
29 * $FreeBSD: head/sys/netgraph/bluetooth/l2cap/ng_l2cap_var.h 128076 2004-04-09 23:01:42Z emax $
30 */
31
32#ifndef _NETGRAPH_L2CAP_VAR_H_
33#define _NETGRAPH_L2CAP_VAR_H_
34
35/* MALLOC decalation */
36#ifdef NG_SEPARATE_MALLOC
37MALLOC_DECLARE(M_NETGRAPH_L2CAP);
38#else
39#define M_NETGRAPH_L2CAP M_NETGRAPH
40#endif /* NG_SEPARATE_MALLOC */
41
42/* Debug */
43#define	NG_L2CAP_ALERT	if (l2cap->debug >= NG_L2CAP_ALERT_LEVEL) printf
44#define	NG_L2CAP_ERR	if (l2cap->debug >= NG_L2CAP_ERR_LEVEL)   printf
45#define	NG_L2CAP_WARN	if (l2cap->debug >= NG_L2CAP_WARN_LEVEL)  printf
46#define	NG_L2CAP_INFO	if (l2cap->debug >= NG_L2CAP_INFO_LEVEL)  printf
47
48/* Wrapper around m_pullup */
49#define NG_L2CAP_M_PULLUP(m, s) \
50	do { \
51		if ((m)->m_len < (s)) \
52			(m) = m_pullup((m), (s)); \
53		if ((m) == NULL) \
54			NG_L2CAP_ALERT("%s: %s - m_pullup(%zd) failed\n", \
55				__func__, NG_NODE_NAME(l2cap->node), (s)); \
56	} while (0)
57
58/*
59 * L2CAP signaling command ident's are assigned relative to the connection,
60 * because there is only one signaling channel (cid == 0x01) for every
61 * connection. So up to 254 (0xff - 0x01) L2CAP commands can be pending at the
62 * same time for the same connection.
63 */
64
65#define NG_L2CAP_NULL_IDENT	0x00        /* DO NOT USE THIS IDENT */
66#define NG_L2CAP_FIRST_IDENT	0x01        /* dynamically alloc. (start) */
67#define NG_L2CAP_LAST_IDENT	0xff        /* dynamically alloc. (end) */
68
69/*
70 * L2CAP (Node private)
71 */
72
73struct ng_l2cap_con;
74struct ng_l2cap_chan;
75
76typedef struct ng_l2cap {
77	node_p				node;         /* node ptr */
78
79	ng_l2cap_node_debug_ep		debug;        /* debug level */
80	ng_l2cap_node_flags_ep		flags;        /* L2CAP node flags */
81	ng_l2cap_node_auto_discon_ep	discon_timo;  /* auto discon. timeout */
82
83	u_int16_t			pkt_size;     /* max. ACL packet size */
84	u_int16_t			num_pkts;     /* out queue size */
85	bdaddr_t			bdaddr;       /* unit BDADDR */
86
87	hook_p				hci;          /* HCI downstream hook */
88	hook_p				l2c;          /* L2CAP upstream hook */
89	hook_p				ctl;          /* control hook */
90
91	LIST_HEAD(, ng_l2cap_con)	con_list;     /* ACL connections */
92
93	u_int16_t			cid;          /* last allocated CID */
94	LIST_HEAD(, ng_l2cap_chan)	chan_list;    /* L2CAP channels */
95} ng_l2cap_t;
96typedef ng_l2cap_t *			ng_l2cap_p;
97
98/*
99 * L2CAP connection descriptor
100 */
101
102struct ng_l2cap_cmd;
103
104typedef struct ng_l2cap_con {
105	ng_l2cap_p			 l2cap;      /* pointer to L2CAP */
106
107	u_int16_t			 state;      /* ACL connection state */
108	u_int16_t			 flags;      /* ACL connection flags */
109
110	int32_t				 refcnt;     /* reference count */
111
112	bdaddr_t			 remote;     /* remote unit address */
113	u_int16_t			 con_handle; /* ACL connection handle */
114	struct callout_handle		 con_timo;   /* connection timeout */
115
116	u_int8_t			 ident;      /* last allocated ident */
117	TAILQ_HEAD(, ng_l2cap_cmd)	 cmd_list;   /* pending L2CAP cmds */
118
119	struct mbuf			*tx_pkt;     /* xmitted L2CAP packet */
120	int				 pending;    /* num. of pending pkts */
121
122	struct mbuf			*rx_pkt;     /* received L2CAP packet */
123	int				 rx_pkt_len; /* packet len. so far */
124
125	LIST_ENTRY(ng_l2cap_con)	 next;       /* link */
126} ng_l2cap_con_t;
127typedef ng_l2cap_con_t *		ng_l2cap_con_p;
128
129/*
130 * L2CAP channel descriptor
131 */
132
133typedef struct ng_l2cap_chan {
134	ng_l2cap_con_p			con;        /* pointer to connection */
135
136	u_int16_t			state;      /* channel state */
137
138	u_int8_t			cfg_state;  /* configuration state */
139#define NG_L2CAP_CFG_IN			(1 << 0)    /* incoming cfg path done */
140#define NG_L2CAP_CFG_OUT		(1 << 1)    /* outgoing cfg path done */
141#define NG_L2CAP_CFG_BOTH		(NG_L2CAP_CFG_IN|NG_L2CAP_CFG_OUT)
142
143	u_int8_t			ident;      /* last L2CAP req. ident */
144
145	u_int16_t			psm;        /* channel PSM */
146	u_int16_t			scid;       /* source channel ID */
147	u_int16_t			dcid;       /* destination channel ID */
148
149	u_int16_t			imtu;       /* incoming channel MTU */
150	ng_l2cap_flow_t			iflow;      /* incoming flow control */
151
152	u_int16_t			omtu;       /* outgoing channel MTU */
153	ng_l2cap_flow_t			oflow;      /* outgoing flow control */
154
155	u_int16_t			flush_timo; /* flush timeout */
156	u_int16_t			link_timo;  /* link timeout */
157
158	LIST_ENTRY(ng_l2cap_chan)	next;       /* link */
159} ng_l2cap_chan_t;
160typedef ng_l2cap_chan_t *		ng_l2cap_chan_p;
161
162/*
163 * L2CAP command descriptor
164 */
165
166typedef struct ng_l2cap_cmd {
167	ng_l2cap_con_p			 con;       /* L2CAP connection */
168	ng_l2cap_chan_p			 ch;        /* L2CAP channel */
169
170	u_int16_t 			 flags;     /* command flags */
171#define NG_L2CAP_CMD_PENDING		 (1 << 0)   /* command is pending */
172
173	u_int8_t 			 code;      /* L2CAP command opcode */
174	u_int8_t			 ident;     /* L2CAP command ident */
175	u_int32_t			 token;     /* L2CA message token */
176
177	struct callout_handle		 timo;      /* RTX/ERTX timeout */
178
179	struct mbuf			*aux;       /* optional data */
180
181	TAILQ_ENTRY(ng_l2cap_cmd)	 next;      /* link */
182} ng_l2cap_cmd_t;
183typedef ng_l2cap_cmd_t *		ng_l2cap_cmd_p;
184
185#endif /* ndef _NETGRAPH_L2CAP_VAR_H_ */
186
187