| /* SPDX-License-Identifier: GPL-2.0 */ | |
| /* | |
| 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> | |
| 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 <linux/unaligned.h> | |
| #include <linux/atomic.h> | |
| /* L2CAP defaults */ | |
| #define L2CAP_DEFAULT_MTU 672 | |
| #define L2CAP_DEFAULT_MIN_MTU 48 | |
| #define L2CAP_SIG_MTU 48 /* BR/EDR signaling MTU */ | |
| #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_ECRED_CONN_SCID_MAX 5 | |
| #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_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200) | |
| #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000) | |
| /* 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_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 | |
| #define L2CAP_ECRED_CONN_REQ 0x17 | |
| #define L2CAP_ECRED_CONN_RSP 0x18 | |
| #define L2CAP_ECRED_RECONF_REQ 0x19 | |
| #define L2CAP_ECRED_RECONF_RSP 0x1a | |
| /* 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_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_LEN_SIZE 2 | |
| #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 */ | |
| #define L2CAP_PSM_DYN_START 0x1001 | |
| #define L2CAP_PSM_DYN_END 0xffff | |
| #define L2CAP_PSM_AUTO_END 0x10ff | |
| #define L2CAP_PSM_LE_DYN_START 0x0080 | |
| #define L2CAP_PSM_LE_DYN_END 0x00ff | |
| /* channel identifier */ | |
| #define L2CAP_CID_SIGNALING 0x0001 | |
| #define L2CAP_CID_CONN_LESS 0x0002 | |
| #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_INVALID_SCID 0x0006 | |
| #define L2CAP_CR_SCID_IN_USE 0x0007 | |
| /* credit based connect results */ | |
| #define L2CAP_CR_LE_SUCCESS 0x0000 | |
| #define L2CAP_CR_LE_BAD_PSM 0x0002 | |
| #define L2CAP_CR_LE_NO_MEM 0x0004 | |
| #define L2CAP_CR_LE_AUTHENTICATION 0x0005 | |
| #define L2CAP_CR_LE_AUTHORIZATION 0x0006 | |
| #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007 | |
| #define L2CAP_CR_LE_ENCRYPTION 0x0008 | |
| #define L2CAP_CR_LE_INVALID_SCID 0x0009 | |
| #define L2CAP_CR_LE_SCID_IN_USE 0x000A | |
| #define L2CAP_CR_LE_UNACCEPT_PARAMS 0x000B | |
| #define L2CAP_CR_LE_INVALID_PARAMS 0x000C | |
| /* 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[]; | |
| } __packed; | |
| struct l2cap_conf_rsp { | |
| __le16 scid; | |
| __le16 flags; | |
| __le16 result; | |
| __u8 data[]; | |
| } __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[]; | |
| } __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 | |
| #define L2CAP_MODE_EXT_FLOWCTL 0x81 | |
| 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[]; | |
| } __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 | |
| 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; | |
| #define L2CAP_ECRED_MIN_MTU 64 | |
| #define L2CAP_ECRED_MIN_MPS 64 | |
| #define L2CAP_ECRED_MAX_CID 5 | |
| struct l2cap_ecred_conn_req { | |
| /* New members must be added within the struct_group() macro below. */ | |
| __struct_group(l2cap_ecred_conn_req_hdr, hdr, __packed, | |
| __le16 psm; | |
| __le16 mtu; | |
| __le16 mps; | |
| __le16 credits; | |
| ); | |
| __le16 scid[]; | |
| } __packed; | |
| struct l2cap_ecred_conn_rsp { | |
| /* New members must be added within the struct_group() macro below. */ | |
| struct_group_tagged(l2cap_ecred_conn_rsp_hdr, hdr, | |
| __le16 mtu; | |
| __le16 mps; | |
| __le16 credits; | |
| __le16 result; | |
| ); | |
| __le16 dcid[]; | |
| }; | |
| struct l2cap_ecred_reconf_req { | |
| __le16 mtu; | |
| __le16 mps; | |
| __le16 scid[]; | |
| } __packed; | |
| #define L2CAP_RECONF_SUCCESS 0x0000 | |
| #define L2CAP_RECONF_INVALID_MTU 0x0001 | |
| #define L2CAP_RECONF_INVALID_MPS 0x0002 | |
| #define L2CAP_RECONF_INVALID_CID 0x0003 | |
| #define L2CAP_RECONF_INVALID_PARAMS 0x0004 | |
| struct l2cap_ecred_reconf_rsp { | |
| __le16 result; | |
| } __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 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; | |
| /* estimated available receive buffer space or -1 if unknown */ | |
| ssize_t rx_avail; | |
| __u8 tx_state; | |
| __u8 rx_state; | |
| unsigned long conf_state; | |
| unsigned long conn_state; | |
| unsigned long flags; | |
| __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; | |
| int (*new_connection)(struct l2cap_chan *chan, | |
| struct l2cap_chan *new_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 pid *(*get_peer_pid) (struct l2cap_chan *chan); | |
| struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, | |
| unsigned long hdr_len, | |
| unsigned long len, int nb); | |
| int (*filter) (struct l2cap_chan * chan, | |
| struct sk_buff *skb); | |
| }; | |
| 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; | |
| struct ida tx_ida; | |
| __u8 tx_ident; | |
| struct sk_buff_head pending_rx; | |
| struct work_struct pending_rx_work; | |
| struct delayed_work id_addr_timer; | |
| __u8 disc_reason; | |
| struct l2cap_chan *smp; | |
| struct list_head chan_l; | |
| struct mutex 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_rx_busy { | |
| struct list_head list; | |
| struct sk_buff *skb; | |
| }; | |
| struct l2cap_pinfo { | |
| struct bt_sock bt; | |
| struct l2cap_chan *chan; | |
| struct list_head rx_busy; | |
| }; | |
| 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_ECRED_CONN_REQ_SENT, | |
| FLAG_PENDING_SECURITY, | |
| FLAG_HOLD_HCI_CONN, | |
| FLAG_DEL, | |
| }; | |
| /* 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); | |
| struct l2cap_chan *l2cap_chan_hold_unless_zero(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 int l2cap_chan_no_new_connection(struct l2cap_chan *chan, | |
| struct l2cap_chan *new_chan) | |
| { | |
| return -EOPNOTSUPP; | |
| } | |
| 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; | |
| extern bool enable_ecred; | |
| 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_ecred_conn_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, u16 timeout); | |
| int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu); | |
| int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, | |
| const struct sockcm_cookie *sockc); | |
| void l2cap_chan_busy(struct l2cap_chan *chan, int busy); | |
| void l2cap_chan_rx_avail(struct l2cap_chan *chan, ssize_t rx_avail); | |
| int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); | |
| void l2cap_chan_set_defaults(struct l2cap_chan *chan, struct l2cap_chan *pchan); | |
| 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); | |
| typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data); | |
| void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func, | |
| void *data); | |
| void l2cap_chan_del(struct l2cap_chan *chan, int err); | |
| void l2cap_send_conn_req(struct l2cap_chan *chan); | |
| struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); | |
| struct l2cap_conn *l2cap_conn_hold_unless_zero(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 */ |