include/net/bluetooth/l2cap.h

Source file repositories/reference/linux-study-clean/include/net/bluetooth/l2cap.h

File Facts

System
Linux kernel
Corpus path
include/net/bluetooth/l2cap.h
Extension
.h
Size
24236 bytes
Lines
982
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

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

Annotation

Implementation Notes