408 lines
9.9 KiB
C
408 lines
9.9 KiB
C
/*
|
|
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_NUM_TO_ACK (L2CAP_DEFAULT_TX_WINDOW/5)
|
|
#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_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;
|
|
};
|
|
|
|
#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
|
|
#define L2CAP_LM_FLUSHABLE 0x0040
|
|
|
|
/* 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 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 flushable;
|
|
|
|
__u8 conf_req[64];
|
|
__u8 conf_len;
|
|
__u8 conf_state;
|
|
__u8 conn_state;
|
|
|
|
__u8 next_tx_seq;
|
|
__u8 expected_ack_seq;
|
|
__u8 req_seq;
|
|
__u8 expected_tx_seq;
|
|
__u8 buffer_seq;
|
|
__u8 buffer_seq_srej;
|
|
__u8 srej_save_reqseq;
|
|
__u8 unacked_frames;
|
|
__u8 retry_count;
|
|
__u8 num_to_ack;
|
|
__u16 sdu_len;
|
|
__u16 partial_sdu_len;
|
|
struct sk_buff *sdu;
|
|
|
|
__u8 ident;
|
|
|
|
__u8 remote_tx_win;
|
|
__u8 remote_max_tx;
|
|
__u16 retrans_timeout;
|
|
__u16 monitor_timeout;
|
|
__u16 max_pdu_size;
|
|
|
|
__le16 sport;
|
|
|
|
struct timer_list retrans_timer;
|
|
struct timer_list monitor_timer;
|
|
struct sk_buff_head tx_queue;
|
|
struct sk_buff_head srej_queue;
|
|
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 0x01
|
|
#define L2CAP_CONN_SREJ_SENT 0x02
|
|
#define L2CAP_CONN_WAIT_F 0x04
|
|
#define L2CAP_CONN_SREJ_ACT 0x08
|
|
#define L2CAP_CONN_SEND_PBIT 0x10
|
|
#define L2CAP_CONN_REMOTE_BUSY 0x20
|
|
#define L2CAP_CONN_LOCAL_BUSY 0x40
|
|
|
|
#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));
|
|
|
|
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 */
|