408 lines
9.9 KiB
C
408 lines
9.9 KiB
C
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/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2000-2001 Qualcomm Incorporated
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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#ifndef __L2CAP_H
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#define __L2CAP_H
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/* L2CAP defaults */
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#define L2CAP_DEFAULT_MTU 672
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#define L2CAP_DEFAULT_MIN_MTU 48
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#define L2CAP_DEFAULT_FLUSH_TO 0xffff
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#define L2CAP_DEFAULT_TX_WINDOW 63
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#define L2CAP_DEFAULT_NUM_TO_ACK (L2CAP_DEFAULT_TX_WINDOW/5)
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#define L2CAP_DEFAULT_MAX_TX 3
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#define L2CAP_DEFAULT_RETRANS_TO 1000 /* 1 second */
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#define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
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#define L2CAP_DEFAULT_MAX_PDU_SIZE 672
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#define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */
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#define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */
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/* L2CAP socket address */
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struct sockaddr_l2 {
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sa_family_t l2_family;
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__le16 l2_psm;
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bdaddr_t l2_bdaddr;
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__le16 l2_cid;
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};
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/* L2CAP socket options */
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#define L2CAP_OPTIONS 0x01
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struct l2cap_options {
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__u16 omtu;
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__u16 imtu;
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__u16 flush_to;
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__u8 mode;
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__u8 fcs;
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};
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#define L2CAP_CONNINFO 0x02
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struct l2cap_conninfo {
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__u16 hci_handle;
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__u8 dev_class[3];
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};
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#define L2CAP_LM 0x03
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#define L2CAP_LM_MASTER 0x0001
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#define L2CAP_LM_AUTH 0x0002
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#define L2CAP_LM_ENCRYPT 0x0004
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#define L2CAP_LM_TRUSTED 0x0008
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#define L2CAP_LM_RELIABLE 0x0010
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#define L2CAP_LM_SECURE 0x0020
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#define L2CAP_LM_FLUSHABLE 0x0040
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/* L2CAP command codes */
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#define L2CAP_COMMAND_REJ 0x01
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#define L2CAP_CONN_REQ 0x02
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#define L2CAP_CONN_RSP 0x03
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#define L2CAP_CONF_REQ 0x04
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#define L2CAP_CONF_RSP 0x05
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#define L2CAP_DISCONN_REQ 0x06
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#define L2CAP_DISCONN_RSP 0x07
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#define L2CAP_ECHO_REQ 0x08
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#define L2CAP_ECHO_RSP 0x09
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#define L2CAP_INFO_REQ 0x0a
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#define L2CAP_INFO_RSP 0x0b
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/* L2CAP feature mask */
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#define L2CAP_FEAT_FLOWCTL 0x00000001
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#define L2CAP_FEAT_RETRANS 0x00000002
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#define L2CAP_FEAT_ERTM 0x00000008
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#define L2CAP_FEAT_STREAMING 0x00000010
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#define L2CAP_FEAT_FCS 0x00000020
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#define L2CAP_FEAT_FIXED_CHAN 0x00000080
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/* L2CAP checksum option */
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#define L2CAP_FCS_NONE 0x00
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#define L2CAP_FCS_CRC16 0x01
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/* L2CAP Control Field bit masks */
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#define L2CAP_CTRL_SAR 0xC000
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#define L2CAP_CTRL_REQSEQ 0x3F00
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#define L2CAP_CTRL_TXSEQ 0x007E
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#define L2CAP_CTRL_RETRANS 0x0080
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#define L2CAP_CTRL_FINAL 0x0080
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#define L2CAP_CTRL_POLL 0x0010
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#define L2CAP_CTRL_SUPERVISE 0x000C
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#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
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#define L2CAP_CTRL_TXSEQ_SHIFT 1
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#define L2CAP_CTRL_REQSEQ_SHIFT 8
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#define L2CAP_CTRL_SAR_SHIFT 14
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/* L2CAP Supervisory Function */
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#define L2CAP_SUPER_RCV_READY 0x0000
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#define L2CAP_SUPER_REJECT 0x0004
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#define L2CAP_SUPER_RCV_NOT_READY 0x0008
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#define L2CAP_SUPER_SELECT_REJECT 0x000C
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/* L2CAP Segmentation and Reassembly */
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#define L2CAP_SDU_UNSEGMENTED 0x0000
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#define L2CAP_SDU_START 0x4000
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#define L2CAP_SDU_END 0x8000
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#define L2CAP_SDU_CONTINUE 0xC000
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/* L2CAP structures */
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struct l2cap_hdr {
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__le16 len;
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__le16 cid;
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} __attribute__ ((packed));
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#define L2CAP_HDR_SIZE 4
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struct l2cap_cmd_hdr {
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__u8 code;
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__u8 ident;
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__le16 len;
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} __attribute__ ((packed));
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#define L2CAP_CMD_HDR_SIZE 4
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struct l2cap_cmd_rej {
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__le16 reason;
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} __attribute__ ((packed));
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struct l2cap_conn_req {
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__le16 psm;
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__le16 scid;
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} __attribute__ ((packed));
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struct l2cap_conn_rsp {
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__le16 dcid;
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__le16 scid;
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__le16 result;
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__le16 status;
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} __attribute__ ((packed));
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/* channel indentifier */
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#define L2CAP_CID_SIGNALING 0x0001
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#define L2CAP_CID_CONN_LESS 0x0002
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#define L2CAP_CID_DYN_START 0x0040
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#define L2CAP_CID_DYN_END 0xffff
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/* connect result */
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#define L2CAP_CR_SUCCESS 0x0000
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#define L2CAP_CR_PEND 0x0001
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#define L2CAP_CR_BAD_PSM 0x0002
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#define L2CAP_CR_SEC_BLOCK 0x0003
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#define L2CAP_CR_NO_MEM 0x0004
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/* connect status */
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#define L2CAP_CS_NO_INFO 0x0000
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#define L2CAP_CS_AUTHEN_PEND 0x0001
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#define L2CAP_CS_AUTHOR_PEND 0x0002
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struct l2cap_conf_req {
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__le16 dcid;
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__le16 flags;
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__u8 data[0];
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} __attribute__ ((packed));
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struct l2cap_conf_rsp {
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__le16 scid;
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__le16 flags;
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__le16 result;
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__u8 data[0];
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} __attribute__ ((packed));
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#define L2CAP_CONF_SUCCESS 0x0000
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#define L2CAP_CONF_UNACCEPT 0x0001
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#define L2CAP_CONF_REJECT 0x0002
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#define L2CAP_CONF_UNKNOWN 0x0003
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struct l2cap_conf_opt {
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__u8 type;
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__u8 len;
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__u8 val[0];
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} __attribute__ ((packed));
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#define L2CAP_CONF_OPT_SIZE 2
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#define L2CAP_CONF_HINT 0x80
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#define L2CAP_CONF_MASK 0x7f
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#define L2CAP_CONF_MTU 0x01
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#define L2CAP_CONF_FLUSH_TO 0x02
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#define L2CAP_CONF_QOS 0x03
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#define L2CAP_CONF_RFC 0x04
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#define L2CAP_CONF_FCS 0x05
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#define L2CAP_CONF_MAX_SIZE 22
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struct l2cap_conf_rfc {
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__u8 mode;
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__u8 txwin_size;
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__u8 max_transmit;
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__le16 retrans_timeout;
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__le16 monitor_timeout;
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__le16 max_pdu_size;
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} __attribute__ ((packed));
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#define L2CAP_MODE_BASIC 0x00
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#define L2CAP_MODE_RETRANS 0x01
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#define L2CAP_MODE_FLOWCTL 0x02
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#define L2CAP_MODE_ERTM 0x03
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#define L2CAP_MODE_STREAMING 0x04
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struct l2cap_disconn_req {
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__le16 dcid;
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__le16 scid;
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} __attribute__ ((packed));
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struct l2cap_disconn_rsp {
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__le16 dcid;
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__le16 scid;
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} __attribute__ ((packed));
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struct l2cap_info_req {
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__le16 type;
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} __attribute__ ((packed));
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struct l2cap_info_rsp {
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__le16 type;
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__le16 result;
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__u8 data[0];
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} __attribute__ ((packed));
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/* info type */
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#define L2CAP_IT_CL_MTU 0x0001
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#define L2CAP_IT_FEAT_MASK 0x0002
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#define L2CAP_IT_FIXED_CHAN 0x0003
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/* info result */
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#define L2CAP_IR_SUCCESS 0x0000
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#define L2CAP_IR_NOTSUPP 0x0001
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/* ----- L2CAP connections ----- */
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struct l2cap_chan_list {
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struct sock *head;
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rwlock_t lock;
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long num;
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};
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struct l2cap_conn {
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struct hci_conn *hcon;
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bdaddr_t *dst;
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bdaddr_t *src;
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unsigned int mtu;
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__u32 feat_mask;
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__u8 info_state;
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__u8 info_ident;
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struct timer_list info_timer;
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spinlock_t lock;
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struct sk_buff *rx_skb;
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__u32 rx_len;
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__u8 rx_ident;
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__u8 tx_ident;
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__u8 disc_reason;
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struct l2cap_chan_list chan_list;
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};
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#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
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#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
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#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
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/* ----- L2CAP channel and socket info ----- */
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#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
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#define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue)
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#define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue)
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#define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list)
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struct srej_list {
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__u8 tx_seq;
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struct list_head list;
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};
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struct l2cap_pinfo {
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struct bt_sock bt;
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__le16 psm;
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__u16 dcid;
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__u16 scid;
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__u16 imtu;
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__u16 omtu;
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__u16 flush_to;
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__u8 mode;
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__u8 num_conf_req;
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__u8 num_conf_rsp;
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__u8 fcs;
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__u8 sec_level;
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__u8 role_switch;
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__u8 force_reliable;
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__u8 flushable;
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__u8 conf_req[64];
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__u8 conf_len;
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__u8 conf_state;
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__u8 conn_state;
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__u8 next_tx_seq;
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__u8 expected_ack_seq;
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__u8 req_seq;
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__u8 expected_tx_seq;
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__u8 buffer_seq;
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__u8 buffer_seq_srej;
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__u8 srej_save_reqseq;
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__u8 unacked_frames;
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__u8 retry_count;
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__u8 num_to_ack;
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__u16 sdu_len;
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__u16 partial_sdu_len;
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struct sk_buff *sdu;
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__u8 ident;
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__u8 remote_tx_win;
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__u8 remote_max_tx;
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__u16 retrans_timeout;
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__u16 monitor_timeout;
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__u16 max_pdu_size;
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__le16 sport;
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struct timer_list retrans_timer;
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struct timer_list monitor_timer;
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struct sk_buff_head tx_queue;
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struct sk_buff_head srej_queue;
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struct srej_list srej_l;
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struct l2cap_conn *conn;
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struct sock *next_c;
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struct sock *prev_c;
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};
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#define L2CAP_CONF_REQ_SENT 0x01
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#define L2CAP_CONF_INPUT_DONE 0x02
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#define L2CAP_CONF_OUTPUT_DONE 0x04
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#define L2CAP_CONF_MTU_DONE 0x08
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#define L2CAP_CONF_MODE_DONE 0x10
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#define L2CAP_CONF_CONNECT_PEND 0x20
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#define L2CAP_CONF_NO_FCS_RECV 0x40
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#define L2CAP_CONF_STATE2_DEVICE 0x80
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#define L2CAP_CONF_MAX_CONF_REQ 2
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#define L2CAP_CONF_MAX_CONF_RSP 2
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||
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#define L2CAP_CONN_SAR_SDU 0x01
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#define L2CAP_CONN_SREJ_SENT 0x02
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#define L2CAP_CONN_WAIT_F 0x04
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#define L2CAP_CONN_SREJ_ACT 0x08
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#define L2CAP_CONN_SEND_PBIT 0x10
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#define L2CAP_CONN_REMOTE_BUSY 0x20
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#define L2CAP_CONN_LOCAL_BUSY 0x40
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||
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#define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \
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jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
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#define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \
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jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
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static inline int l2cap_tx_window_full(struct sock *sk)
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{
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struct l2cap_pinfo *pi = l2cap_pi(sk);
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int sub;
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||
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sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64;
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if (sub < 0)
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sub += 64;
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||
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||
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return (sub == pi->remote_tx_win);
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||
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}
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||
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#define __get_txseq(ctrl) ((ctrl) & L2CAP_CTRL_TXSEQ) >> 1
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#define __get_reqseq(ctrl) ((ctrl) & L2CAP_CTRL_REQSEQ) >> 8
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#define __is_iframe(ctrl) !((ctrl) & L2CAP_CTRL_FRAME_TYPE)
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#define __is_sframe(ctrl) (ctrl) & L2CAP_CTRL_FRAME_TYPE
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#define __is_sar_start(ctrl) ((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START
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||
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||
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void l2cap_load(void);
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||
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||
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#endif /* __L2CAP_H */
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