include/net/bluetooth/l2cap.h

   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 #define L2CAP_DEFAULT_RX_WINDOW         1
  32 #define L2CAP_DEFAULT_MAX_RECEIVE       1
  33 #define L2CAP_DEFAULT_RETRANS_TO        300    /* 300 milliseconds */
  34 #define L2CAP_DEFAULT_MONITOR_TO        1000   /* 1 second */
  35 #define L2CAP_DEFAULT_MAX_RX_APDU       0xfff7
  36
  37 #define L2CAP_CONN_TIMEOUT      (40000) /* 40 seconds */
  38 #define L2CAP_INFO_TIMEOUT      (4000)  /*  4 seconds */
  39
  40 /* L2CAP socket address */
  41 struct sockaddr_l2 {
  42         sa_family_t     l2_family;
  43         __le16          l2_psm;
  44         bdaddr_t        l2_bdaddr;
  45         __le16          l2_cid;
  46 };
  47
  48 /* L2CAP socket options */
  49 #define L2CAP_OPTIONS   0x01
  50 struct l2cap_options {
  51         __u16 omtu;
  52         __u16 imtu;
  53         __u16 flush_to;
  54         __u8  mode;
  55 };
  56
  57 #define L2CAP_CONNINFO  0x02
  58 struct l2cap_conninfo {
  59         __u16 hci_handle;
  60         __u8  dev_class[3];
  61 };
  62
  63 #define L2CAP_LM        0x03
  64 #define L2CAP_LM_MASTER         0x0001
  65 #define L2CAP_LM_AUTH           0x0002
  66 #define L2CAP_LM_ENCRYPT        0x0004
  67 #define L2CAP_LM_TRUSTED        0x0008
  68 #define L2CAP_LM_RELIABLE       0x0010
  69 #define L2CAP_LM_SECURE         0x0020
  70
  71 /* L2CAP command codes */
  72 #define L2CAP_COMMAND_REJ       0x01
  73 #define L2CAP_CONN_REQ          0x02
  74 #define L2CAP_CONN_RSP          0x03
  75 #define L2CAP_CONF_REQ          0x04
  76 #define L2CAP_CONF_RSP          0x05
  77 #define L2CAP_DISCONN_REQ       0x06
  78 #define L2CAP_DISCONN_RSP       0x07
  79 #define L2CAP_ECHO_REQ          0x08
  80 #define L2CAP_ECHO_RSP          0x09
  81 #define L2CAP_INFO_REQ          0x0a
  82 #define L2CAP_INFO_RSP          0x0b
  83
  84 /* L2CAP feature mask */
  85 #define L2CAP_FEAT_FLOWCTL      0x00000001
  86 #define L2CAP_FEAT_RETRANS      0x00000002
  87 #define L2CAP_FEAT_ERTM         0x00000008
  88 #define L2CAP_FEAT_STREAMING    0x00000010
  89 #define L2CAP_FEAT_FCS          0x00000020
  90 #define L2CAP_FEAT_FIXED_CHAN   0x00000080
  91
  92 /* L2CAP checksum option */
  93 #define L2CAP_FCS_NONE          0x00
  94 #define L2CAP_FCS_CRC16         0x01
  95
  96 /* L2CAP structures */
  97 struct l2cap_hdr {
  98         __le16     len;
  99         __le16     cid;
 100 } __attribute__ ((packed));
 101 #define L2CAP_HDR_SIZE          4
 102
 103 struct l2cap_cmd_hdr {
 104         __u8       code;
 105         __u8       ident;
 106         __le16     len;
 107 } __attribute__ ((packed));
 108 #define L2CAP_CMD_HDR_SIZE      4
 109
 110 struct l2cap_cmd_rej {
 111         __le16     reason;
 112 } __attribute__ ((packed));
 113
 114 struct l2cap_conn_req {
 115         __le16     psm;
 116         __le16     scid;
 117 } __attribute__ ((packed));
 118
 119 struct l2cap_conn_rsp {
 120         __le16     dcid;
 121         __le16     scid;
 122         __le16     result;
 123         __le16     status;
 124 } __attribute__ ((packed));
 125
 126 /* channel indentifier */
 127 #define L2CAP_CID_SIGNALING     0x0001
 128 #define L2CAP_CID_CONN_LESS     0x0002
 129 #define L2CAP_CID_DYN_START     0x0040
 130 #define L2CAP_CID_DYN_END       0xffff
 131
 132 /* connect result */
 133 #define L2CAP_CR_SUCCESS        0x0000
 134 #define L2CAP_CR_PEND           0x0001
 135 #define L2CAP_CR_BAD_PSM        0x0002
 136 #define L2CAP_CR_SEC_BLOCK      0x0003
 137 #define L2CAP_CR_NO_MEM         0x0004
 138
 139 /* connect status */
 140 #define L2CAP_CS_NO_INFO        0x0000
 141 #define L2CAP_CS_AUTHEN_PEND    0x0001
 142 #define L2CAP_CS_AUTHOR_PEND    0x0002
 143
 144 struct l2cap_conf_req {
 145         __le16     dcid;
 146         __le16     flags;
 147         __u8       data[0];
 148 } __attribute__ ((packed));
 149
 150 struct l2cap_conf_rsp {
 151         __le16     scid;
 152         __le16     flags;
 153         __le16     result;
 154         __u8       data[0];
 155 } __attribute__ ((packed));
 156
 157 #define L2CAP_CONF_SUCCESS      0x0000
 158 #define L2CAP_CONF_UNACCEPT     0x0001
 159 #define L2CAP_CONF_REJECT       0x0002
 160 #define L2CAP_CONF_UNKNOWN      0x0003
 161
 162 struct l2cap_conf_opt {
 163         __u8       type;
 164         __u8       len;
 165         __u8       val[0];
 166 } __attribute__ ((packed));
 167 #define L2CAP_CONF_OPT_SIZE     2
 168
 169 #define L2CAP_CONF_HINT         0x80
 170 #define L2CAP_CONF_MASK         0x7f
 171
 172 #define L2CAP_CONF_MTU          0x01
 173 #define L2CAP_CONF_FLUSH_TO     0x02
 174 #define L2CAP_CONF_QOS          0x03
 175 #define L2CAP_CONF_RFC          0x04
 176 #define L2CAP_CONF_FCS          0x05
 177
 178 #define L2CAP_CONF_MAX_SIZE     22
 179
 180 struct l2cap_conf_rfc {
 181         __u8       mode;
 182         __u8       txwin_size;
 183         __u8       max_transmit;
 184         __le16     retrans_timeout;
 185         __le16     monitor_timeout;
 186         __le16     max_pdu_size;
 187 } __attribute__ ((packed));
 188
 189 #define L2CAP_MODE_BASIC        0x00
 190 #define L2CAP_MODE_RETRANS      0x01
 191 #define L2CAP_MODE_FLOWCTL      0x02
 192 #define L2CAP_MODE_ERTM         0x03
 193 #define L2CAP_MODE_STREAM       0x04
 194
 195 struct l2cap_disconn_req {
 196         __le16     dcid;
 197         __le16     scid;
 198 } __attribute__ ((packed));
 199
 200 struct l2cap_disconn_rsp {
 201         __le16     dcid;
 202         __le16     scid;
 203 } __attribute__ ((packed));
 204
 205 struct l2cap_info_req {
 206         __le16      type;
 207 } __attribute__ ((packed));
 208
 209 struct l2cap_info_rsp {
 210         __le16      type;
 211         __le16      result;
 212         __u8        data[0];
 213 } __attribute__ ((packed));
 214
 215 /* info type */
 216 #define L2CAP_IT_CL_MTU     0x0001
 217 #define L2CAP_IT_FEAT_MASK  0x0002
 218 #define L2CAP_IT_FIXED_CHAN 0x0003
 219
 220 /* info result */
 221 #define L2CAP_IR_SUCCESS    0x0000
 222 #define L2CAP_IR_NOTSUPP    0x0001
 223
 224 /* ----- L2CAP connections ----- */
 225 struct l2cap_chan_list {
 226         struct sock     *head;
 227         rwlock_t        lock;
 228         long            num;
 229 };
 230
 231 struct l2cap_conn {
 232         struct hci_conn *hcon;
 233
 234         bdaddr_t        *dst;
 235         bdaddr_t        *src;
 236
 237         unsigned int    mtu;
 238
 239         __u32           feat_mask;
 240
 241         __u8            info_state;
 242         __u8            info_ident;
 243
 244         struct timer_list info_timer;
 245
 246         spinlock_t      lock;
 247
 248         struct sk_buff *rx_skb;
 249         __u32           rx_len;
 250         __u8            rx_ident;
 251         __u8            tx_ident;
 252
 253         __u8            disc_reason;
 254
 255         struct l2cap_chan_list chan_list;
 256 };
 257
 258 #define L2CAP_INFO_CL_MTU_REQ_SENT      0x01
 259 #define L2CAP_INFO_FEAT_MASK_REQ_SENT   0x04
 260 #define L2CAP_INFO_FEAT_MASK_REQ_DONE   0x08
 261
 262 /* ----- L2CAP channel and socket info ----- */
 263 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
 264
 265 struct l2cap_pinfo {
 266         struct bt_sock  bt;
 267         __le16          psm;
 268         __u16           dcid;
 269         __u16           scid;
 270
 271         __u16           imtu;
 272         __u16           omtu;
 273         __u16           flush_to;
 274         __u8            sec_level;
 275         __u8            role_switch;
 276         __u8            force_reliable;
 277
 278         __u8            conf_req[64];
 279         __u8            conf_len;
 280         __u8            conf_state;
 281         __u8            conf_retry;
 282
 283         __u8            ident;
 284
 285         __le16          sport;
 286
 287         struct l2cap_conn       *conn;
 288         struct sock             *next_c;
 289         struct sock             *prev_c;
 290 };
 291
 292 #define L2CAP_CONF_REQ_SENT     0x01
 293 #define L2CAP_CONF_INPUT_DONE   0x02
 294 #define L2CAP_CONF_OUTPUT_DONE  0x04
 295 #define L2CAP_CONF_CONNECT_PEND 0x80
 296
 297 #define L2CAP_CONF_MAX_RETRIES  2
 298
 299 void l2cap_load(void);
 300
 301 #endif /* __L2CAP_H */