| /* |
| BlueZ - Bluetooth protocol stack for Linux |
| Copyright (C) 2000-2001 Qualcomm Incorporated |
| Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
| Copyright (C) 2010 Google Inc. |
| |
| Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License version 2 as |
| published by the Free Software Foundation; |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
| CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| |
| ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
| SOFTWARE IS DISCLAIMED. |
| */ |
| |
| #ifndef __L2CAP_H |
| #define __L2CAP_H |
| |
| /* L2CAP defaults */ |
| #define L2CAP_DEFAULT_MTU 672 |
| #define L2CAP_DEFAULT_MIN_MTU 48 |
| #define L2CAP_DEFAULT_FLUSH_TO 0xffff |
| #define L2CAP_DEFAULT_TX_WINDOW 63 |
| #define L2CAP_DEFAULT_MAX_TX 3 |
| #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ |
| #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ |
| #define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */ |
| #define L2CAP_DEFAULT_ACK_TO 200 |
| #define L2CAP_LOCAL_BUSY_TRIES 12 |
| |
| #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */ |
| #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */ |
| |
| /* L2CAP socket address */ |
| struct sockaddr_l2 { |
| sa_family_t l2_family; |
| __le16 l2_psm; |
| bdaddr_t l2_bdaddr; |
| __le16 l2_cid; |
| }; |
| |
| /* L2CAP socket options */ |
| #define L2CAP_OPTIONS 0x01 |
| struct l2cap_options { |
| __u16 omtu; |
| __u16 imtu; |
| __u16 flush_to; |
| __u8 mode; |
| __u8 fcs; |
| __u8 max_tx; |
| __u16 txwin_size; |
| }; |
| |
| #define L2CAP_CONNINFO 0x02 |
| struct l2cap_conninfo { |
| __u16 hci_handle; |
| __u8 dev_class[3]; |
| }; |
| |
| #define L2CAP_LM 0x03 |
| #define L2CAP_LM_MASTER 0x0001 |
| #define L2CAP_LM_AUTH 0x0002 |
| #define L2CAP_LM_ENCRYPT 0x0004 |
| #define L2CAP_LM_TRUSTED 0x0008 |
| #define L2CAP_LM_RELIABLE 0x0010 |
| #define L2CAP_LM_SECURE 0x0020 |
| |
| /* L2CAP command codes */ |
| #define L2CAP_COMMAND_REJ 0x01 |
| #define L2CAP_CONN_REQ 0x02 |
| #define L2CAP_CONN_RSP 0x03 |
| #define L2CAP_CONF_REQ 0x04 |
| #define L2CAP_CONF_RSP 0x05 |
| #define L2CAP_DISCONN_REQ 0x06 |
| #define L2CAP_DISCONN_RSP 0x07 |
| #define L2CAP_ECHO_REQ 0x08 |
| #define L2CAP_ECHO_RSP 0x09 |
| #define L2CAP_INFO_REQ 0x0a |
| #define L2CAP_INFO_RSP 0x0b |
| |
| /* L2CAP feature mask */ |
| #define L2CAP_FEAT_FLOWCTL 0x00000001 |
| #define L2CAP_FEAT_RETRANS 0x00000002 |
| #define L2CAP_FEAT_ERTM 0x00000008 |
| #define L2CAP_FEAT_STREAMING 0x00000010 |
| #define L2CAP_FEAT_FCS 0x00000020 |
| #define L2CAP_FEAT_FIXED_CHAN 0x00000080 |
| |
| /* L2CAP checksum option */ |
| #define L2CAP_FCS_NONE 0x00 |
| #define L2CAP_FCS_CRC16 0x01 |
| |
| /* L2CAP Control Field bit masks */ |
| #define L2CAP_CTRL_SAR 0xC000 |
| #define L2CAP_CTRL_REQSEQ 0x3F00 |
| #define L2CAP_CTRL_TXSEQ 0x007E |
| #define L2CAP_CTRL_RETRANS 0x0080 |
| #define L2CAP_CTRL_FINAL 0x0080 |
| #define L2CAP_CTRL_POLL 0x0010 |
| #define L2CAP_CTRL_SUPERVISE 0x000C |
| #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ |
| |
| #define L2CAP_CTRL_TXSEQ_SHIFT 1 |
| #define L2CAP_CTRL_REQSEQ_SHIFT 8 |
| #define L2CAP_CTRL_SAR_SHIFT 14 |
| |
| /* L2CAP Supervisory Function */ |
| #define L2CAP_SUPER_RCV_READY 0x0000 |
| #define L2CAP_SUPER_REJECT 0x0004 |
| #define L2CAP_SUPER_RCV_NOT_READY 0x0008 |
| #define L2CAP_SUPER_SELECT_REJECT 0x000C |
| |
| /* L2CAP Segmentation and Reassembly */ |
| #define L2CAP_SDU_UNSEGMENTED 0x0000 |
| #define L2CAP_SDU_START 0x4000 |
| #define L2CAP_SDU_END 0x8000 |
| #define L2CAP_SDU_CONTINUE 0xC000 |
| |
| /* L2CAP structures */ |
| struct l2cap_hdr { |
| __le16 len; |
| __le16 cid; |
| } __packed; |
| #define L2CAP_HDR_SIZE 4 |
| |
| struct l2cap_cmd_hdr { |
| __u8 code; |
| __u8 ident; |
| __le16 len; |
| } __packed; |
| #define L2CAP_CMD_HDR_SIZE 4 |
| |
| struct l2cap_cmd_rej { |
| __le16 reason; |
| } __packed; |
| |
| struct l2cap_conn_req { |
| __le16 psm; |
| __le16 scid; |
| } __packed; |
| |
| struct l2cap_conn_rsp { |
| __le16 dcid; |
| __le16 scid; |
| __le16 result; |
| __le16 status; |
| } __packed; |
| |
| /* channel indentifier */ |
| #define L2CAP_CID_SIGNALING 0x0001 |
| #define L2CAP_CID_CONN_LESS 0x0002 |
| #define L2CAP_CID_DYN_START 0x0040 |
| #define L2CAP_CID_DYN_END 0xffff |
| |
| /* connect result */ |
| #define L2CAP_CR_SUCCESS 0x0000 |
| #define L2CAP_CR_PEND 0x0001 |
| #define L2CAP_CR_BAD_PSM 0x0002 |
| #define L2CAP_CR_SEC_BLOCK 0x0003 |
| #define L2CAP_CR_NO_MEM 0x0004 |
| |
| /* connect status */ |
| #define L2CAP_CS_NO_INFO 0x0000 |
| #define L2CAP_CS_AUTHEN_PEND 0x0001 |
| #define L2CAP_CS_AUTHOR_PEND 0x0002 |
| |
| struct l2cap_conf_req { |
| __le16 dcid; |
| __le16 flags; |
| __u8 data[0]; |
| } __packed; |
| |
| struct l2cap_conf_rsp { |
| __le16 scid; |
| __le16 flags; |
| __le16 result; |
| __u8 data[0]; |
| } __packed; |
| |
| #define L2CAP_CONF_SUCCESS 0x0000 |
| #define L2CAP_CONF_UNACCEPT 0x0001 |
| #define L2CAP_CONF_REJECT 0x0002 |
| #define L2CAP_CONF_UNKNOWN 0x0003 |
| |
| struct l2cap_conf_opt { |
| __u8 type; |
| __u8 len; |
| __u8 val[0]; |
| } __packed; |
| #define L2CAP_CONF_OPT_SIZE 2 |
| |
| #define L2CAP_CONF_HINT 0x80 |
| #define L2CAP_CONF_MASK 0x7f |
| |
| #define L2CAP_CONF_MTU 0x01 |
| #define L2CAP_CONF_FLUSH_TO 0x02 |
| #define L2CAP_CONF_QOS 0x03 |
| #define L2CAP_CONF_RFC 0x04 |
| #define L2CAP_CONF_FCS 0x05 |
| |
| #define L2CAP_CONF_MAX_SIZE 22 |
| |
| struct l2cap_conf_rfc { |
| __u8 mode; |
| __u8 txwin_size; |
| __u8 max_transmit; |
| __le16 retrans_timeout; |
| __le16 monitor_timeout; |
| __le16 max_pdu_size; |
| } __packed; |
| |
| #define L2CAP_MODE_BASIC 0x00 |
| #define L2CAP_MODE_RETRANS 0x01 |
| #define L2CAP_MODE_FLOWCTL 0x02 |
| #define L2CAP_MODE_ERTM 0x03 |
| #define L2CAP_MODE_STREAMING 0x04 |
| |
| struct l2cap_disconn_req { |
| __le16 dcid; |
| __le16 scid; |
| } __packed; |
| |
| struct l2cap_disconn_rsp { |
| __le16 dcid; |
| __le16 scid; |
| } __packed; |
| |
| struct l2cap_info_req { |
| __le16 type; |
| } __packed; |
| |
| struct l2cap_info_rsp { |
| __le16 type; |
| __le16 result; |
| __u8 data[0]; |
| } __packed; |
| |
| /* info type */ |
| #define L2CAP_IT_CL_MTU 0x0001 |
| #define L2CAP_IT_FEAT_MASK 0x0002 |
| #define L2CAP_IT_FIXED_CHAN 0x0003 |
| |
| /* info result */ |
| #define L2CAP_IR_SUCCESS 0x0000 |
| #define L2CAP_IR_NOTSUPP 0x0001 |
| |
| /* ----- L2CAP connections ----- */ |
| struct l2cap_chan_list { |
| struct sock *head; |
| rwlock_t lock; |
| long num; |
| }; |
| |
| struct l2cap_conn { |
| struct hci_conn *hcon; |
| |
| bdaddr_t *dst; |
| bdaddr_t *src; |
| |
| unsigned int mtu; |
| |
| __u32 feat_mask; |
| |
| __u8 info_state; |
| __u8 info_ident; |
| |
| struct timer_list info_timer; |
| |
| spinlock_t lock; |
| |
| struct sk_buff *rx_skb; |
| __u32 rx_len; |
| __u8 rx_ident; |
| __u8 tx_ident; |
| |
| __u8 disc_reason; |
| |
| struct l2cap_chan_list chan_list; |
| }; |
| |
| struct sock_del_list { |
| struct sock *sk; |
| struct list_head list; |
| }; |
| |
| #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 |
| #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 |
| #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 |
| |
| /* ----- L2CAP channel and socket info ----- */ |
| #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) |
| #define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue) |
| #define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue) |
| #define BUSY_QUEUE(sk) (&l2cap_pi(sk)->busy_queue) |
| #define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list) |
| |
| struct srej_list { |
| __u8 tx_seq; |
| struct list_head list; |
| }; |
| |
| struct l2cap_pinfo { |
| struct bt_sock bt; |
| __le16 psm; |
| __u16 dcid; |
| __u16 scid; |
| |
| __u16 imtu; |
| __u16 omtu; |
| __u16 flush_to; |
| __u8 mode; |
| __u8 num_conf_req; |
| __u8 num_conf_rsp; |
| |
| __u8 fcs; |
| __u8 sec_level; |
| __u8 role_switch; |
| __u8 force_reliable; |
| |
| __u8 conf_req[64]; |
| __u8 conf_len; |
| __u8 conf_state; |
| __u16 conn_state; |
| |
| __u8 next_tx_seq; |
| __u8 expected_ack_seq; |
| __u8 expected_tx_seq; |
| __u8 buffer_seq; |
| __u8 buffer_seq_srej; |
| __u8 srej_save_reqseq; |
| __u8 frames_sent; |
| __u8 unacked_frames; |
| __u8 retry_count; |
| __u8 num_acked; |
| __u16 sdu_len; |
| __u16 partial_sdu_len; |
| struct sk_buff *sdu; |
| |
| __u8 ident; |
| |
| __u8 tx_win; |
| __u8 max_tx; |
| __u8 remote_tx_win; |
| __u8 remote_max_tx; |
| __u16 retrans_timeout; |
| __u16 monitor_timeout; |
| __u16 remote_mps; |
| __u16 mps; |
| |
| __le16 sport; |
| |
| struct timer_list retrans_timer; |
| struct timer_list monitor_timer; |
| struct timer_list ack_timer; |
| struct sk_buff_head tx_queue; |
| struct sk_buff_head srej_queue; |
| struct sk_buff_head busy_queue; |
| struct work_struct busy_work; |
| struct srej_list srej_l; |
| struct l2cap_conn *conn; |
| struct sock *next_c; |
| struct sock *prev_c; |
| }; |
| |
| #define L2CAP_CONF_REQ_SENT 0x01 |
| #define L2CAP_CONF_INPUT_DONE 0x02 |
| #define L2CAP_CONF_OUTPUT_DONE 0x04 |
| #define L2CAP_CONF_MTU_DONE 0x08 |
| #define L2CAP_CONF_MODE_DONE 0x10 |
| #define L2CAP_CONF_CONNECT_PEND 0x20 |
| #define L2CAP_CONF_NO_FCS_RECV 0x40 |
| #define L2CAP_CONF_STATE2_DEVICE 0x80 |
| |
| #define L2CAP_CONF_MAX_CONF_REQ 2 |
| #define L2CAP_CONF_MAX_CONF_RSP 2 |
| |
| #define L2CAP_CONN_SAR_SDU 0x0001 |
| #define L2CAP_CONN_SREJ_SENT 0x0002 |
| #define L2CAP_CONN_WAIT_F 0x0004 |
| #define L2CAP_CONN_SREJ_ACT 0x0008 |
| #define L2CAP_CONN_SEND_PBIT 0x0010 |
| #define L2CAP_CONN_REMOTE_BUSY 0x0020 |
| #define L2CAP_CONN_LOCAL_BUSY 0x0040 |
| #define L2CAP_CONN_REJ_ACT 0x0080 |
| #define L2CAP_CONN_SEND_FBIT 0x0100 |
| #define L2CAP_CONN_RNR_SENT 0x0200 |
| #define L2CAP_CONN_SAR_RETRY 0x0400 |
| |
| #define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \ |
| jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); |
| #define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \ |
| jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO)); |
| #define __mod_ack_timer() mod_timer(&l2cap_pi(sk)->ack_timer, \ |
| jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); |
| |
| static inline int l2cap_tx_window_full(struct sock *sk) |
| { |
| struct l2cap_pinfo *pi = l2cap_pi(sk); |
| int sub; |
| |
| sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64; |
| |
| if (sub < 0) |
| sub += 64; |
| |
| return sub == pi->remote_tx_win; |
| } |
| |
| #define __get_txseq(ctrl) (((ctrl) & L2CAP_CTRL_TXSEQ) >> 1) |
| #define __get_reqseq(ctrl) (((ctrl) & L2CAP_CTRL_REQSEQ) >> 8) |
| #define __is_iframe(ctrl) (!((ctrl) & L2CAP_CTRL_FRAME_TYPE)) |
| #define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE) |
| #define __is_sar_start(ctrl) (((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START) |
| |
| void l2cap_load(void); |
| |
| #endif /* __L2CAP_H */ |
