--- /dev/null
+/*
+ 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
+
+#include <asm/unaligned.h>
+#include <linux/atomic.h>
+
+/* L2CAP defaults */
+#define L2CAP_DEFAULT_MTU 672
+#define L2CAP_DEFAULT_MIN_MTU 48
+#define L2CAP_DEFAULT_FLUSH_TO 0xFFFF
+#define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF
+#define L2CAP_DEFAULT_TX_WINDOW 63
+#define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
+#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 1492 /* Sized for AMP packet */
+#define L2CAP_DEFAULT_ACK_TO 200
+#define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
+#define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
+#define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
+#define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */
+#define L2CAP_LE_MIN_MTU 23
+
+#define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
+#define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
+#define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
+#define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
+#define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
+#define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000)
+#define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000)
+
+#define L2CAP_A2MP_DEFAULT_MTU 670
+
+/* L2CAP socket address */
+struct sockaddr_l2 {
+ sa_family_t l2_family;
+ __le16 l2_psm;
+ bdaddr_t l2_bdaddr;
+ __le16 l2_cid;
+ __u8 l2_bdaddr_type;
+};
+
+/* 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
+#define L2CAP_LM_FIPS 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
+#define L2CAP_CREATE_CHAN_REQ 0x0c
+#define L2CAP_CREATE_CHAN_RSP 0x0d
+#define L2CAP_MOVE_CHAN_REQ 0x0e
+#define L2CAP_MOVE_CHAN_RSP 0x0f
+#define L2CAP_MOVE_CHAN_CFM 0x10
+#define L2CAP_MOVE_CHAN_CFM_RSP 0x11
+#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
+#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
+#define L2CAP_LE_CONN_REQ 0x14
+#define L2CAP_LE_CONN_RSP 0x15
+#define L2CAP_LE_CREDITS 0x16
+
+/* L2CAP extended feature mask */
+#define L2CAP_FEAT_FLOWCTL 0x00000001
+#define L2CAP_FEAT_RETRANS 0x00000002
+#define L2CAP_FEAT_BIDIR_QOS 0x00000004
+#define L2CAP_FEAT_ERTM 0x00000008
+#define L2CAP_FEAT_STREAMING 0x00000010
+#define L2CAP_FEAT_FCS 0x00000020
+#define L2CAP_FEAT_EXT_FLOW 0x00000040
+#define L2CAP_FEAT_FIXED_CHAN 0x00000080
+#define L2CAP_FEAT_EXT_WINDOW 0x00000100
+#define L2CAP_FEAT_UCD 0x00000200
+
+/* L2CAP checksum option */
+#define L2CAP_FCS_NONE 0x00
+#define L2CAP_FCS_CRC16 0x01
+
+/* L2CAP fixed channels */
+#define L2CAP_FC_SIG_BREDR 0x02
+#define L2CAP_FC_CONNLESS 0x04
+#define L2CAP_FC_A2MP 0x08
+#define L2CAP_FC_ATT 0x10
+#define L2CAP_FC_SIG_LE 0x20
+#define L2CAP_FC_SMP_LE 0x40
+#define L2CAP_FC_SMP_BREDR 0x80
+
+/* L2CAP Control Field bit masks */
+#define L2CAP_CTRL_SAR 0xC000
+#define L2CAP_CTRL_REQSEQ 0x3F00
+#define L2CAP_CTRL_TXSEQ 0x007E
+#define L2CAP_CTRL_SUPERVISE 0x000C
+
+#define L2CAP_CTRL_RETRANS 0x0080
+#define L2CAP_CTRL_FINAL 0x0080
+#define L2CAP_CTRL_POLL 0x0010
+#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
+
+#define L2CAP_CTRL_TXSEQ_SHIFT 1
+#define L2CAP_CTRL_SUPER_SHIFT 2
+#define L2CAP_CTRL_POLL_SHIFT 4
+#define L2CAP_CTRL_FINAL_SHIFT 7
+#define L2CAP_CTRL_REQSEQ_SHIFT 8
+#define L2CAP_CTRL_SAR_SHIFT 14
+
+/* L2CAP Extended Control Field bit mask */
+#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
+#define L2CAP_EXT_CTRL_SAR 0x00030000
+#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
+#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
+
+#define L2CAP_EXT_CTRL_POLL 0x00040000
+#define L2CAP_EXT_CTRL_FINAL 0x00000002
+#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
+
+#define L2CAP_EXT_CTRL_FINAL_SHIFT 1
+#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
+#define L2CAP_EXT_CTRL_SAR_SHIFT 16
+#define L2CAP_EXT_CTRL_SUPER_SHIFT 16
+#define L2CAP_EXT_CTRL_POLL_SHIFT 18
+#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
+
+/* L2CAP Supervisory Function */
+#define L2CAP_SUPER_RR 0x00
+#define L2CAP_SUPER_REJ 0x01
+#define L2CAP_SUPER_RNR 0x02
+#define L2CAP_SUPER_SREJ 0x03
+
+/* L2CAP Segmentation and Reassembly */
+#define L2CAP_SAR_UNSEGMENTED 0x00
+#define L2CAP_SAR_START 0x01
+#define L2CAP_SAR_END 0x02
+#define L2CAP_SAR_CONTINUE 0x03
+
+/* L2CAP Command rej. reasons */
+#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
+#define L2CAP_REJ_MTU_EXCEEDED 0x0001
+#define L2CAP_REJ_INVALID_CID 0x0002
+
+/* L2CAP structures */
+struct l2cap_hdr {
+ __le16 len;
+ __le16 cid;
+} __packed;
+#define L2CAP_HDR_SIZE 4
+#define L2CAP_ENH_HDR_SIZE 6
+#define L2CAP_EXT_HDR_SIZE 8
+
+#define L2CAP_FCS_SIZE 2
+#define L2CAP_SDULEN_SIZE 2
+#define L2CAP_PSMLEN_SIZE 2
+#define L2CAP_ENH_CTRL_SIZE 2
+#define L2CAP_EXT_CTRL_SIZE 4
+
+struct l2cap_cmd_hdr {
+ __u8 code;
+ __u8 ident;
+ __le16 len;
+} __packed;
+#define L2CAP_CMD_HDR_SIZE 4
+
+struct l2cap_cmd_rej_unk {
+ __le16 reason;
+} __packed;
+
+struct l2cap_cmd_rej_mtu {
+ __le16 reason;
+ __le16 max_mtu;
+} __packed;
+
+struct l2cap_cmd_rej_cid {
+ __le16 reason;
+ __le16 scid;
+ __le16 dcid;
+} __packed;
+
+struct l2cap_conn_req {
+ __le16 psm;
+ __le16 scid;
+} __packed;
+
+struct l2cap_conn_rsp {
+ __le16 dcid;
+ __le16 scid;
+ __le16 result;
+ __le16 status;
+} __packed;
+
+/* protocol/service multiplexer (PSM) */
+#define L2CAP_PSM_SDP 0x0001
+#define L2CAP_PSM_RFCOMM 0x0003
+#define L2CAP_PSM_3DSP 0x0021
+#define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */
+
+/* channel identifier */
+#define L2CAP_CID_SIGNALING 0x0001
+#define L2CAP_CID_CONN_LESS 0x0002
+#define L2CAP_CID_A2MP 0x0003
+#define L2CAP_CID_ATT 0x0004
+#define L2CAP_CID_LE_SIGNALING 0x0005
+#define L2CAP_CID_SMP 0x0006
+#define L2CAP_CID_SMP_BREDR 0x0007
+#define L2CAP_CID_DYN_START 0x0040
+#define L2CAP_CID_DYN_END 0xffff
+#define L2CAP_CID_LE_DYN_END 0x007f
+
+/* connect/create channel results */
+#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
+#define L2CAP_CR_BAD_AMP 0x0005
+#define L2CAP_CR_AUTHENTICATION 0x0005
+#define L2CAP_CR_AUTHORIZATION 0x0006
+#define L2CAP_CR_BAD_KEY_SIZE 0x0007
+#define L2CAP_CR_ENCRYPTION 0x0008
+
+/* connect/create channel 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
+#define L2CAP_CONF_PENDING 0x0004
+#define L2CAP_CONF_EFS_REJECT 0x0005
+
+/* configuration req/rsp continuation flag */
+#define L2CAP_CONF_FLAG_CONTINUATION 0x0001
+
+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_EFS 0x06
+#define L2CAP_CONF_EWS 0x07
+
+#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
+
+/* Unlike the above this one doesn't actually map to anything that would
+ * ever be sent over the air. Therefore, use a value that's unlikely to
+ * ever be used in the BR/EDR configuration phase.
+ */
+#define L2CAP_MODE_LE_FLOWCTL 0x80
+
+struct l2cap_conf_efs {
+ __u8 id;
+ __u8 stype;
+ __le16 msdu;
+ __le32 sdu_itime;
+ __le32 acc_lat;
+ __le32 flush_to;
+} __packed;
+
+#define L2CAP_SERV_NOTRAFIC 0x00
+#define L2CAP_SERV_BESTEFFORT 0x01
+#define L2CAP_SERV_GUARANTEED 0x02
+
+#define L2CAP_BESTEFFORT_ID 0x01
+
+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;
+
+struct l2cap_create_chan_req {
+ __le16 psm;
+ __le16 scid;
+ __u8 amp_id;
+} __packed;
+
+struct l2cap_create_chan_rsp {
+ __le16 dcid;
+ __le16 scid;
+ __le16 result;
+ __le16 status;
+} __packed;
+
+struct l2cap_move_chan_req {
+ __le16 icid;
+ __u8 dest_amp_id;
+} __packed;
+
+struct l2cap_move_chan_rsp {
+ __le16 icid;
+ __le16 result;
+} __packed;
+
+#define L2CAP_MR_SUCCESS 0x0000
+#define L2CAP_MR_PEND 0x0001
+#define L2CAP_MR_BAD_ID 0x0002
+#define L2CAP_MR_SAME_ID 0x0003
+#define L2CAP_MR_NOT_SUPP 0x0004
+#define L2CAP_MR_COLLISION 0x0005
+#define L2CAP_MR_NOT_ALLOWED 0x0006
+
+struct l2cap_move_chan_cfm {
+ __le16 icid;
+ __le16 result;
+} __packed;
+
+#define L2CAP_MC_CONFIRMED 0x0000
+#define L2CAP_MC_UNCONFIRMED 0x0001
+
+struct l2cap_move_chan_cfm_rsp {
+ __le16 icid;
+} __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
+
+struct l2cap_conn_param_update_req {
+ __le16 min;
+ __le16 max;
+ __le16 latency;
+ __le16 to_multiplier;
+} __packed;
+
+struct l2cap_conn_param_update_rsp {
+ __le16 result;
+} __packed;
+
+/* Connection Parameters result */
+#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
+#define L2CAP_CONN_PARAM_REJECTED 0x0001
+
+#define L2CAP_LE_MAX_CREDITS 10
+#define L2CAP_LE_DEFAULT_MPS 230
+
+struct l2cap_le_conn_req {
+ __le16 psm;
+ __le16 scid;
+ __le16 mtu;
+ __le16 mps;
+ __le16 credits;
+} __packed;
+
+struct l2cap_le_conn_rsp {
+ __le16 dcid;
+ __le16 mtu;
+ __le16 mps;
+ __le16 credits;
+ __le16 result;
+} __packed;
+
+struct l2cap_le_credits {
+ __le16 cid;
+ __le16 credits;
+} __packed;
+
+/* ----- L2CAP channels and connections ----- */
+struct l2cap_seq_list {
+ __u16 head;
+ __u16 tail;
+ __u16 mask;
+ __u16 *list;
+};
+
+#define L2CAP_SEQ_LIST_CLEAR 0xFFFF
+#define L2CAP_SEQ_LIST_TAIL 0x8000
+
+struct l2cap_chan {
+ struct l2cap_conn *conn;
+ struct hci_conn *hs_hcon;
+ struct hci_chan *hs_hchan;
+ struct kref kref;
+ atomic_t nesting;
+
+ __u8 state;
+
+ bdaddr_t dst;
+ __u8 dst_type;
+ bdaddr_t src;
+ __u8 src_type;
+ __le16 psm;
+ __le16 sport;
+ __u16 dcid;
+ __u16 scid;
+
+ __u16 imtu;
+ __u16 omtu;
+ __u16 flush_to;
+ __u8 mode;
+ __u8 chan_type;
+ __u8 chan_policy;
+
+ __u8 sec_level;
+
+ __u8 ident;
+
+ __u8 conf_req[64];
+ __u8 conf_len;
+ __u8 num_conf_req;
+ __u8 num_conf_rsp;
+
+ __u8 fcs;
+
+ __u16 tx_win;
+ __u16 tx_win_max;
+ __u16 ack_win;
+ __u8 max_tx;
+ __u16 retrans_timeout;
+ __u16 monitor_timeout;
+ __u16 mps;
+
+ __u16 tx_credits;
+ __u16 rx_credits;
+
+ __u8 tx_state;
+ __u8 rx_state;
+
+ unsigned long conf_state;
+ unsigned long conn_state;
+ unsigned long flags;
+
+ __u8 remote_amp_id;
+ __u8 local_amp_id;
+ __u8 move_id;
+ __u8 move_state;
+ __u8 move_role;
+
+ __u16 next_tx_seq;
+ __u16 expected_ack_seq;
+ __u16 expected_tx_seq;
+ __u16 buffer_seq;
+ __u16 srej_save_reqseq;
+ __u16 last_acked_seq;
+ __u16 frames_sent;
+ __u16 unacked_frames;
+ __u8 retry_count;
+ __u16 sdu_len;
+ struct sk_buff *sdu;
+ struct sk_buff *sdu_last_frag;
+
+ __u16 remote_tx_win;
+ __u8 remote_max_tx;
+ __u16 remote_mps;
+
+ __u8 local_id;
+ __u8 local_stype;
+ __u16 local_msdu;
+ __u32 local_sdu_itime;
+ __u32 local_acc_lat;
+ __u32 local_flush_to;
+
+ __u8 remote_id;
+ __u8 remote_stype;
+ __u16 remote_msdu;
+ __u32 remote_sdu_itime;
+ __u32 remote_acc_lat;
+ __u32 remote_flush_to;
+
+ struct delayed_work chan_timer;
+ struct delayed_work retrans_timer;
+ struct delayed_work monitor_timer;
+ struct delayed_work ack_timer;
+
+ struct sk_buff *tx_send_head;
+ struct sk_buff_head tx_q;
+ struct sk_buff_head srej_q;
+ struct l2cap_seq_list srej_list;
+ struct l2cap_seq_list retrans_list;
+
+ struct list_head list;
+ struct list_head global_l;
+
+ void *data;
+ const struct l2cap_ops *ops;
+ struct mutex lock;
+};
+
+struct l2cap_ops {
+ char *name;
+
+ struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
+ int (*recv) (struct l2cap_chan * chan,
+ struct sk_buff *skb);
+ void (*teardown) (struct l2cap_chan *chan, int err);
+ void (*close) (struct l2cap_chan *chan);
+ void (*state_change) (struct l2cap_chan *chan,
+ int state, int err);
+ void (*ready) (struct l2cap_chan *chan);
+ void (*defer) (struct l2cap_chan *chan);
+ void (*resume) (struct l2cap_chan *chan);
+ void (*suspend) (struct l2cap_chan *chan);
+ void (*set_shutdown) (struct l2cap_chan *chan);
+ long (*get_sndtimeo) (struct l2cap_chan *chan);
+ struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
+ unsigned long hdr_len,
+ unsigned long len, int nb);
+};
+
+struct l2cap_conn {
+ struct hci_conn *hcon;
+ struct hci_chan *hchan;
+
+ unsigned int mtu;
+
+ __u32 feat_mask;
+ __u8 remote_fixed_chan;
+ __u8 local_fixed_chan;
+
+ __u8 info_state;
+ __u8 info_ident;
+
+ struct delayed_work info_timer;
+
+ struct sk_buff *rx_skb;
+ __u32 rx_len;
+ __u8 tx_ident;
+ struct mutex ident_lock;
+
+ struct sk_buff_head pending_rx;
+ struct work_struct pending_rx_work;
+
+ struct work_struct id_addr_update_work;
+
+ __u8 disc_reason;
+
+ struct l2cap_chan *smp;
+
+ struct list_head chan_l;
+ struct mutex chan_lock;
+ struct kref ref;
+ struct list_head users;
+};
+
+struct l2cap_user {
+ struct list_head list;
+ int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
+ void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
+};
+
+#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
+#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
+#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
+
+#define L2CAP_CHAN_RAW 1
+#define L2CAP_CHAN_CONN_LESS 2
+#define L2CAP_CHAN_CONN_ORIENTED 3
+#define L2CAP_CHAN_FIXED 4
+
+/* ----- L2CAP socket info ----- */
+#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
+
+struct l2cap_pinfo {
+ struct bt_sock bt;
+ struct l2cap_chan *chan;
+ struct sk_buff *rx_busy_skb;
+};
+
+enum {
+ CONF_REQ_SENT,
+ CONF_INPUT_DONE,
+ CONF_OUTPUT_DONE,
+ CONF_MTU_DONE,
+ CONF_MODE_DONE,
+ CONF_CONNECT_PEND,
+ CONF_RECV_NO_FCS,
+ CONF_STATE2_DEVICE,
+ CONF_EWS_RECV,
+ CONF_LOC_CONF_PEND,
+ CONF_REM_CONF_PEND,
+ CONF_NOT_COMPLETE,
+};
+
+#define L2CAP_CONF_MAX_CONF_REQ 2
+#define L2CAP_CONF_MAX_CONF_RSP 2
+
+enum {
+ CONN_SREJ_SENT,
+ CONN_WAIT_F,
+ CONN_SREJ_ACT,
+ CONN_SEND_PBIT,
+ CONN_REMOTE_BUSY,
+ CONN_LOCAL_BUSY,
+ CONN_REJ_ACT,
+ CONN_SEND_FBIT,
+ CONN_RNR_SENT,
+};
+
+/* Definitions for flags in l2cap_chan */
+enum {
+ FLAG_ROLE_SWITCH,
+ FLAG_FORCE_ACTIVE,
+ FLAG_FORCE_RELIABLE,
+ FLAG_FLUSHABLE,
+ FLAG_EXT_CTRL,
+ FLAG_EFS_ENABLE,
+ FLAG_DEFER_SETUP,
+ FLAG_LE_CONN_REQ_SENT,
+ FLAG_PENDING_SECURITY,
+ FLAG_HOLD_HCI_CONN,
+};
+
+/* Lock nesting levels for L2CAP channels. We need these because lockdep
+ * otherwise considers all channels equal and will e.g. complain about a
+ * connection oriented channel triggering SMP procedures or a listening
+ * channel creating and locking a child channel.
+ */
+enum {
+ L2CAP_NESTING_SMP,
+ L2CAP_NESTING_NORMAL,
+ L2CAP_NESTING_PARENT,
+};
+
+enum {
+ L2CAP_TX_STATE_XMIT,
+ L2CAP_TX_STATE_WAIT_F,
+};
+
+enum {
+ L2CAP_RX_STATE_RECV,
+ L2CAP_RX_STATE_SREJ_SENT,
+ L2CAP_RX_STATE_MOVE,
+ L2CAP_RX_STATE_WAIT_P,
+ L2CAP_RX_STATE_WAIT_F,
+};
+
+enum {
+ L2CAP_TXSEQ_EXPECTED,
+ L2CAP_TXSEQ_EXPECTED_SREJ,
+ L2CAP_TXSEQ_UNEXPECTED,
+ L2CAP_TXSEQ_UNEXPECTED_SREJ,
+ L2CAP_TXSEQ_DUPLICATE,
+ L2CAP_TXSEQ_DUPLICATE_SREJ,
+ L2CAP_TXSEQ_INVALID,
+ L2CAP_TXSEQ_INVALID_IGNORE,
+};
+
+enum {
+ L2CAP_EV_DATA_REQUEST,
+ L2CAP_EV_LOCAL_BUSY_DETECTED,
+ L2CAP_EV_LOCAL_BUSY_CLEAR,
+ L2CAP_EV_RECV_REQSEQ_AND_FBIT,
+ L2CAP_EV_RECV_FBIT,
+ L2CAP_EV_RETRANS_TO,
+ L2CAP_EV_MONITOR_TO,
+ L2CAP_EV_EXPLICIT_POLL,
+ L2CAP_EV_RECV_IFRAME,
+ L2CAP_EV_RECV_RR,
+ L2CAP_EV_RECV_REJ,
+ L2CAP_EV_RECV_RNR,
+ L2CAP_EV_RECV_SREJ,
+ L2CAP_EV_RECV_FRAME,
+};
+
+enum {
+ L2CAP_MOVE_ROLE_NONE,
+ L2CAP_MOVE_ROLE_INITIATOR,
+ L2CAP_MOVE_ROLE_RESPONDER,
+};
+
+enum {
+ L2CAP_MOVE_STABLE,
+ L2CAP_MOVE_WAIT_REQ,
+ L2CAP_MOVE_WAIT_RSP,
+ L2CAP_MOVE_WAIT_RSP_SUCCESS,
+ L2CAP_MOVE_WAIT_CONFIRM,
+ L2CAP_MOVE_WAIT_CONFIRM_RSP,
+ L2CAP_MOVE_WAIT_LOGICAL_COMP,
+ L2CAP_MOVE_WAIT_LOGICAL_CFM,
+ L2CAP_MOVE_WAIT_LOCAL_BUSY,
+ L2CAP_MOVE_WAIT_PREPARE,
+};
+
+void l2cap_chan_hold(struct l2cap_chan *c);
+void l2cap_chan_put(struct l2cap_chan *c);
+
+static inline void l2cap_chan_lock(struct l2cap_chan *chan)
+{
+ mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting));
+}
+
+static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
+{
+ mutex_unlock(&chan->lock);
+}
+
+static inline void l2cap_set_timer(struct l2cap_chan *chan,
+ struct delayed_work *work, long timeout)
+{
+ BT_DBG("chan %p state %s timeout %ld", chan,
+ state_to_string(chan->state), timeout);
+
+ /* If delayed work cancelled do not hold(chan)
+ since it is already done with previous set_timer */
+ if (!cancel_delayed_work(work))
+ l2cap_chan_hold(chan);
+
+ schedule_delayed_work(work, timeout);
+}
+
+static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
+ struct delayed_work *work)
+{
+ bool ret;
+
+ /* put(chan) if delayed work cancelled otherwise it
+ is done in delayed work function */
+ ret = cancel_delayed_work(work);
+ if (ret)
+ l2cap_chan_put(chan);
+
+ return ret;
+}
+
+#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
+#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
+#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
+#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
+#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
+ msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
+#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
+
+static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
+{
+ if (seq1 >= seq2)
+ return seq1 - seq2;
+ else
+ return chan->tx_win_max + 1 - seq2 + seq1;
+}
+
+static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
+{
+ return (seq + 1) % (chan->tx_win_max + 1);
+}
+
+static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
+{
+ return NULL;
+}
+
+static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+ return -ENOSYS;
+}
+
+static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan,
+ unsigned long hdr_len,
+ unsigned long len, int nb)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
+{
+}
+
+static inline void l2cap_chan_no_close(struct l2cap_chan *chan)
+{
+}
+
+static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
+{
+}
+
+static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan,
+ int state, int err)
+{
+}
+
+static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
+{
+}
+
+static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan)
+{
+}
+
+static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
+{
+}
+
+static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
+{
+}
+
+static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
+{
+ return 0;
+}
+
+extern bool disable_ertm;
+
+int l2cap_init_sockets(void);
+void l2cap_cleanup_sockets(void);
+bool l2cap_is_socket(struct socket *sock);
+
+void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
+void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
+
+int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
+int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
+
+struct l2cap_chan *l2cap_chan_create(void);
+void l2cap_chan_close(struct l2cap_chan *chan, int reason);
+int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
+ bdaddr_t *dst, u8 dst_type);
+int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
+void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
+int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator);
+void l2cap_chan_set_defaults(struct l2cap_chan *chan);
+int l2cap_ertm_init(struct l2cap_chan *chan);
+void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
+void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
+void l2cap_chan_del(struct l2cap_chan *chan, int err);
+void l2cap_send_conn_req(struct l2cap_chan *chan);
+void l2cap_move_start(struct l2cap_chan *chan);
+void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
+ u8 status);
+void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
+
+struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn);
+void l2cap_conn_put(struct l2cap_conn *conn);
+
+int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
+void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
+
+#endif /* __L2CAP_H */
Code Review / kvmfornfv.git / blobdiff