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 */ 302