1/*
2 * ng_l2cap_var.h
3 */
4
5/*-
6 * Copyright (c) 2001 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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 AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $Id: ng_l2cap_var.h,v 1.2 2003/04/28 21:44:59 max Exp $
31 * $FreeBSD$
32 */
33
34#ifndef _NETGRAPH_L2CAP_VAR_H_
35#define _NETGRAPH_L2CAP_VAR_H_
36
37/* MALLOC decalation */
38#ifdef NG_SEPARATE_MALLOC
39MALLOC_DECLARE(M_NETGRAPH_L2CAP);
40#else
41#define M_NETGRAPH_L2CAP M_NETGRAPH
42#endif /* NG_SEPARATE_MALLOC */
43
44/* Debug */
45#define	NG_L2CAP_ALERT	if (l2cap->debug >= NG_L2CAP_ALERT_LEVEL) printf
46#define	NG_L2CAP_ERR	if (l2cap->debug >= NG_L2CAP_ERR_LEVEL)   printf
47#define	NG_L2CAP_WARN	if (l2cap->debug >= NG_L2CAP_WARN_LEVEL)  printf
48#define	NG_L2CAP_INFO	if (l2cap->debug >= NG_L2CAP_INFO_LEVEL)  printf
49
50/* Wrapper around m_pullup */
51#define NG_L2CAP_M_PULLUP(m, s) \
52	do { \
53		if ((m)->m_len < (s)) \
54			(m) = m_pullup((m), (s)); \
55		if ((m) == NULL) \
56			NG_L2CAP_ALERT("%s: %s - m_pullup(%zd) failed\n", \
57				__func__, NG_NODE_NAME(l2cap->node), (s)); \
58	} while (0)
59
60/*
61 * L2CAP signaling command ident's are assigned relative to the connection,
62 * because there is only one signaling channel (cid == 0x01) for every
63 * connection. So up to 254 (0xff - 0x01) L2CAP commands can be pending at the
64 * same time for the same connection.
65 */
66
67#define NG_L2CAP_NULL_IDENT	0x00        /* DO NOT USE THIS IDENT */
68#define NG_L2CAP_FIRST_IDENT	0x01        /* dynamically alloc. (start) */
69#define NG_L2CAP_LAST_IDENT	0xff        /* dynamically alloc. (end) */
70
71/*
72 * L2CAP (Node private)
73 */
74
75struct ng_l2cap_con;
76struct ng_l2cap_chan;
77
78typedef struct ng_l2cap {
79	node_p				node;         /* node ptr */
80
81	ng_l2cap_node_debug_ep		debug;        /* debug level */
82	ng_l2cap_node_flags_ep		flags;        /* L2CAP node flags */
83	ng_l2cap_node_auto_discon_ep	discon_timo;  /* auto discon. timeout */
84
85	u_int16_t			pkt_size;     /* max. ACL packet size */
86	u_int16_t			num_pkts;     /* out queue size */
87	bdaddr_t			bdaddr;       /* unit BDADDR */
88
89	hook_p				hci;          /* HCI downstream hook */
90	hook_p				l2c;          /* L2CAP upstream hook */
91	hook_p				ctl;          /* control hook */
92
93	LIST_HEAD(, ng_l2cap_con)	con_list;     /* ACL connections */
94
95    	u_int16_t			cid;          /* last allocated CID */
96    	u_int16_t			lecid;          /* last allocated CID for LE */
97
98	LIST_HEAD(, ng_l2cap_chan)	chan_list;    /* L2CAP channels */
99} ng_l2cap_t;
100typedef ng_l2cap_t *			ng_l2cap_p;
101
102/*
103 * L2CAP connection descriptor
104 */
105
106struct ng_l2cap_cmd;
107
108typedef struct ng_l2cap_con {
109	ng_l2cap_p			 l2cap;      /* pointer to L2CAP */
110
111	u_int16_t			 state;      /* ACL connection state */
112	u_int16_t			 flags;      /* ACL connection flags */
113
114	int32_t				 refcnt;     /* reference count */
115
116	bdaddr_t			 remote;     /* remote unit address */
117	u_int16_t			 con_handle; /* ACL connection handle */
118	struct callout			 con_timo;   /* connection timeout */
119
120	u_int8_t			 ident;      /* last allocated ident */
121	uint8_t				 linktype;
122	uint8_t				 encryption;
123
124	TAILQ_HEAD(, ng_l2cap_cmd)	 cmd_list;   /* pending L2CAP cmds */
125
126	struct mbuf			*tx_pkt;     /* xmitted L2CAP packet */
127	int				 pending;    /* num. of pending pkts */
128
129	struct mbuf			*rx_pkt;     /* received L2CAP packet */
130	int				 rx_pkt_len; /* packet len. so far */
131
132	LIST_ENTRY(ng_l2cap_con)	 next;       /* link */
133} ng_l2cap_con_t;
134typedef ng_l2cap_con_t *		ng_l2cap_con_p;
135
136/*
137 * L2CAP channel descriptor
138 */
139
140typedef struct ng_l2cap_chan {
141	ng_l2cap_con_p			con;        /* pointer to connection */
142
143	u_int16_t			state;      /* channel state */
144
145	u_int8_t			cfg_state;  /* configuration state */
146#define NG_L2CAP_CFG_IN			(1 << 0)    /* incoming cfg path done */
147#define NG_L2CAP_CFG_OUT		(1 << 1)    /* outgoing cfg path done */
148#define NG_L2CAP_CFG_BOTH		(NG_L2CAP_CFG_IN|NG_L2CAP_CFG_OUT)
149
150	u_int8_t			ident;      /* last L2CAP req. ident */
151
152	u_int16_t			psm;        /* channel PSM */
153	u_int16_t			scid;       /* source channel ID */
154	u_int16_t			dcid;       /* destination channel ID */
155
156	uint16_t			idtype;
157	u_int16_t			imtu;       /* incoming channel MTU */
158	ng_l2cap_flow_t			iflow;      /* incoming flow control */
159
160	u_int16_t			omtu;       /* outgoing channel MTU */
161	ng_l2cap_flow_t			oflow;      /* outgoing flow control */
162
163	u_int16_t			flush_timo; /* flush timeout */
164	u_int16_t			link_timo;  /* link timeout */
165
166	LIST_ENTRY(ng_l2cap_chan)	next;       /* link */
167} ng_l2cap_chan_t;
168typedef ng_l2cap_chan_t *		ng_l2cap_chan_p;
169
170/*
171 * L2CAP command descriptor
172 */
173
174typedef struct ng_l2cap_cmd {
175	ng_l2cap_con_p			 con;       /* L2CAP connection */
176	ng_l2cap_chan_p			 ch;        /* L2CAP channel */
177
178	u_int16_t 			 flags;     /* command flags */
179#define NG_L2CAP_CMD_PENDING		 (1 << 0)   /* command is pending */
180
181	u_int8_t 			 code;      /* L2CAP command opcode */
182	u_int8_t			 ident;     /* L2CAP command ident */
183	u_int32_t			 token;     /* L2CA message token */
184
185	struct callout			 timo;      /* RTX/ERTX timeout */
186
187	struct mbuf			*aux;       /* optional data */
188
189	TAILQ_ENTRY(ng_l2cap_cmd)	 next;      /* link */
190} ng_l2cap_cmd_t;
191typedef ng_l2cap_cmd_t *		ng_l2cap_cmd_p;
192
193#endif /* ndef _NETGRAPH_L2CAP_VAR_H_ */
194
195