| /* | |
| BlueZ - Bluetooth protocol stack for Linux | |
| Copyright (C) 2000-2001 Qualcomm Incorporated | |
| 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 1000 /* 1 second */ | |
| #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ | |
| #define L2CAP_DEFAULT_MAX_PDU_SIZE 672 | |
| #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; | |
| } __attribute__ ((packed)); | |
| #define L2CAP_HDR_SIZE 4 | |
| struct l2cap_cmd_hdr { | |
| __u8 code; | |
| __u8 ident; | |
| __le16 len; | |
| } __attribute__ ((packed)); | |
| #define L2CAP_CMD_HDR_SIZE 4 | |
| struct l2cap_cmd_rej { | |
| __le16 reason; | |
| } __attribute__ ((packed)); | |
| struct l2cap_conn_req { | |
| __le16 psm; | |
| __le16 scid; | |
| } __attribute__ ((packed)); | |
| struct l2cap_conn_rsp { | |
| __le16 dcid; | |
| __le16 scid; | |
| __le16 result; | |
| __le16 status; | |
| } __attribute__ ((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]; | |
| } __attribute__ ((packed)); | |
| struct l2cap_conf_rsp { | |
| __le16 scid; | |
| __le16 flags; | |
| __le16 result; | |
| __u8 data[0]; | |
| } __attribute__ ((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]; | |
| } __attribute__ ((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; | |
| } __attribute__ ((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; | |
| } __attribute__ ((packed)); | |
| struct l2cap_disconn_rsp { | |
| __le16 dcid; | |
| __le16 scid; | |
| } __attribute__ ((packed)); | |
| struct l2cap_info_req { | |
| __le16 type; | |
| } __attribute__ ((packed)); | |
| struct l2cap_info_rsp { | |
| __le16 type; | |
| __le16 result; | |
| __u8 data[0]; | |
| } __attribute__ ((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; | |
| }; | |
| #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; | |
| spinlock_t send_lock; | |
| 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 */ |