xref: /openbmc/linux/include/net/bluetooth/l2cap.h (revision b04b4f78)
1 /*
2    BlueZ - Bluetooth protocol stack for Linux
3    Copyright (C) 2000-2001 Qualcomm Incorporated
4 
5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6 
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License version 2 as
9    published by the Free Software Foundation;
10 
11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 
20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22    SOFTWARE IS DISCLAIMED.
23 */
24 
25 #ifndef __L2CAP_H
26 #define __L2CAP_H
27 
28 /* L2CAP defaults */
29 #define L2CAP_DEFAULT_MTU	672
30 #define L2CAP_DEFAULT_FLUSH_TO	0xFFFF
31 
32 #define L2CAP_CONN_TIMEOUT	(40000) /* 40 seconds */
33 #define L2CAP_INFO_TIMEOUT	(4000)  /*  4 seconds */
34 
35 /* L2CAP socket address */
36 struct sockaddr_l2 {
37 	sa_family_t	l2_family;
38 	__le16		l2_psm;
39 	bdaddr_t	l2_bdaddr;
40 	__le16		l2_cid;
41 };
42 
43 /* L2CAP socket options */
44 #define L2CAP_OPTIONS	0x01
45 struct l2cap_options {
46 	__u16 omtu;
47 	__u16 imtu;
48 	__u16 flush_to;
49 	__u8  mode;
50 };
51 
52 #define L2CAP_CONNINFO	0x02
53 struct l2cap_conninfo {
54 	__u16 hci_handle;
55 	__u8  dev_class[3];
56 };
57 
58 #define L2CAP_LM	0x03
59 #define L2CAP_LM_MASTER		0x0001
60 #define L2CAP_LM_AUTH		0x0002
61 #define L2CAP_LM_ENCRYPT	0x0004
62 #define L2CAP_LM_TRUSTED	0x0008
63 #define L2CAP_LM_RELIABLE	0x0010
64 #define L2CAP_LM_SECURE		0x0020
65 
66 /* L2CAP command codes */
67 #define L2CAP_COMMAND_REJ 0x01
68 #define L2CAP_CONN_REQ    0x02
69 #define L2CAP_CONN_RSP    0x03
70 #define L2CAP_CONF_REQ    0x04
71 #define L2CAP_CONF_RSP    0x05
72 #define L2CAP_DISCONN_REQ 0x06
73 #define L2CAP_DISCONN_RSP 0x07
74 #define L2CAP_ECHO_REQ    0x08
75 #define L2CAP_ECHO_RSP    0x09
76 #define L2CAP_INFO_REQ    0x0a
77 #define L2CAP_INFO_RSP    0x0b
78 
79 /* L2CAP structures */
80 struct l2cap_hdr {
81 	__le16     len;
82 	__le16     cid;
83 } __attribute__ ((packed));
84 #define L2CAP_HDR_SIZE		4
85 
86 struct l2cap_cmd_hdr {
87 	__u8       code;
88 	__u8       ident;
89 	__le16     len;
90 } __attribute__ ((packed));
91 #define L2CAP_CMD_HDR_SIZE	4
92 
93 struct l2cap_cmd_rej {
94 	__le16     reason;
95 } __attribute__ ((packed));
96 
97 struct l2cap_conn_req {
98 	__le16     psm;
99 	__le16     scid;
100 } __attribute__ ((packed));
101 
102 struct l2cap_conn_rsp {
103 	__le16     dcid;
104 	__le16     scid;
105 	__le16     result;
106 	__le16     status;
107 } __attribute__ ((packed));
108 
109 /* connect result */
110 #define L2CAP_CR_SUCCESS    0x0000
111 #define L2CAP_CR_PEND       0x0001
112 #define L2CAP_CR_BAD_PSM    0x0002
113 #define L2CAP_CR_SEC_BLOCK  0x0003
114 #define L2CAP_CR_NO_MEM     0x0004
115 
116 /* connect status */
117 #define L2CAP_CS_NO_INFO      0x0000
118 #define L2CAP_CS_AUTHEN_PEND  0x0001
119 #define L2CAP_CS_AUTHOR_PEND  0x0002
120 
121 struct l2cap_conf_req {
122 	__le16     dcid;
123 	__le16     flags;
124 	__u8       data[0];
125 } __attribute__ ((packed));
126 
127 struct l2cap_conf_rsp {
128 	__le16     scid;
129 	__le16     flags;
130 	__le16     result;
131 	__u8       data[0];
132 } __attribute__ ((packed));
133 
134 #define L2CAP_CONF_SUCCESS	0x0000
135 #define L2CAP_CONF_UNACCEPT	0x0001
136 #define L2CAP_CONF_REJECT	0x0002
137 #define L2CAP_CONF_UNKNOWN	0x0003
138 
139 struct l2cap_conf_opt {
140 	__u8       type;
141 	__u8       len;
142 	__u8       val[0];
143 } __attribute__ ((packed));
144 #define L2CAP_CONF_OPT_SIZE	2
145 
146 #define L2CAP_CONF_MTU		0x01
147 #define L2CAP_CONF_FLUSH_TO	0x02
148 #define L2CAP_CONF_QOS		0x03
149 #define L2CAP_CONF_RFC		0x04
150 
151 #define L2CAP_CONF_MAX_SIZE	22
152 
153 struct l2cap_conf_rfc {
154 	__u8       mode;
155 	__u8       txwin_size;
156 	__u8       max_transmit;
157 	__le16     retrans_timeout;
158 	__le16     monitor_timeout;
159 	__le16     max_pdu_size;
160 } __attribute__ ((packed));
161 
162 #define L2CAP_MODE_BASIC	0x00
163 #define L2CAP_MODE_RETRANS	0x01
164 #define L2CAP_MODE_FLOWCTL	0x02
165 
166 struct l2cap_disconn_req {
167 	__le16     dcid;
168 	__le16     scid;
169 } __attribute__ ((packed));
170 
171 struct l2cap_disconn_rsp {
172 	__le16     dcid;
173 	__le16     scid;
174 } __attribute__ ((packed));
175 
176 struct l2cap_info_req {
177 	__le16      type;
178 } __attribute__ ((packed));
179 
180 struct l2cap_info_rsp {
181 	__le16      type;
182 	__le16      result;
183 	__u8        data[0];
184 } __attribute__ ((packed));
185 
186 /* info type */
187 #define L2CAP_IT_CL_MTU     0x0001
188 #define L2CAP_IT_FEAT_MASK  0x0002
189 #define L2CAP_IT_FIXED_CHAN 0x0003
190 
191 /* info result */
192 #define L2CAP_IR_SUCCESS    0x0000
193 #define L2CAP_IR_NOTSUPP    0x0001
194 
195 /* ----- L2CAP connections ----- */
196 struct l2cap_chan_list {
197 	struct sock	*head;
198 	rwlock_t	lock;
199 	long		num;
200 };
201 
202 struct l2cap_conn {
203 	struct hci_conn	*hcon;
204 
205 	bdaddr_t	*dst;
206 	bdaddr_t	*src;
207 
208 	unsigned int	mtu;
209 
210 	__u32		feat_mask;
211 
212 	__u8		info_state;
213 	__u8		info_ident;
214 
215 	struct timer_list info_timer;
216 
217 	spinlock_t	lock;
218 
219 	struct sk_buff *rx_skb;
220 	__u32		rx_len;
221 	__u8		rx_ident;
222 	__u8		tx_ident;
223 
224 	__u8		disc_reason;
225 
226 	struct l2cap_chan_list chan_list;
227 };
228 
229 #define L2CAP_INFO_CL_MTU_REQ_SENT	0x01
230 #define L2CAP_INFO_FEAT_MASK_REQ_SENT	0x04
231 #define L2CAP_INFO_FEAT_MASK_REQ_DONE	0x08
232 
233 /* ----- L2CAP channel and socket info ----- */
234 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
235 
236 struct l2cap_pinfo {
237 	struct bt_sock	bt;
238 	__le16		psm;
239 	__u16		dcid;
240 	__u16		scid;
241 
242 	__u16		imtu;
243 	__u16		omtu;
244 	__u16		flush_to;
245 	__u8            sec_level;
246 	__u8		role_switch;
247 	__u8            force_reliable;
248 
249 	__u8		conf_req[64];
250 	__u8		conf_len;
251 	__u8		conf_state;
252 	__u8		conf_retry;
253 
254 	__u8		ident;
255 
256 	__le16		sport;
257 
258 	struct l2cap_conn	*conn;
259 	struct sock		*next_c;
260 	struct sock		*prev_c;
261 };
262 
263 #define L2CAP_CONF_REQ_SENT	0x01
264 #define L2CAP_CONF_INPUT_DONE	0x02
265 #define L2CAP_CONF_OUTPUT_DONE	0x04
266 #define L2CAP_CONF_CONNECT_PEND	0x80
267 
268 #define L2CAP_CONF_MAX_RETRIES	2
269 
270 void l2cap_load(void);
271 
272 #endif /* __L2CAP_H */
273