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NG_BLUETOOTH(4) FreeBSD Kernel Interfaces Manual NG_BLUETOOTH(4) NAME bluetooth -- placeholder for global Bluetooth variables SYNOPSIS #include <sys/types.h> #include <ng_bluetooth.h> DESCRIPTION The bluetooth module is a placeholder for global Bluetooth variables. All Bluetooth variables can be examined and changed via sysctl(8). BLUETOOTH VARIABLES Below is the description of default variables. Each Bluetooth module might add its own variables to the tree. net.bluetooth.version A read only integer variable that shows the current version of the Bluetooth stack. net.bluetooth.hci.command_timeout A read-write interger variable that controls the Host Controller Interface (HCI) command timeout (in seconds), i.e. how long the HCI layer will wait for the Command_Complete or Command_Status event from a Bluetooth device. net.bluetooth.hci.connection_timeout A read-write integer variable that controls the HCI connection timeout, i.e. how long the HCI layer will wait for the Connection_Complete event. Normaly this should not be required as Bluetooth devices have connection timeout of their own and will send event back. This timeout is required to ensure that no con- nection will stall in case when the HCI transport layer is bro- ken. Be careful when changing this variable. Make sure you understand what you are doing. net.bluetooth.hci.watchdog_timeout A read-write integer variable that controls the HCI connection watchdog timeout in seconds), i.e. how long the HCI layer should wait before disconnecting an inactive baseband connection. This has not been implemented yet. net.bluetooth.hci.max_neighbor_age A read-write integer variable that controls time-to-live (in sec- onds) for entries in the HCI neighbor cache. Every time a Blue- tooth device performs an Inquiry operation, the results will be put in cache. Later when a Bluetooth device establishes a base- band connection, it will try to find the matching entry in the cache and use it. This might speed up establishment of the base- band connection. net.bluetooth.l2cap.rtx_timeout A read-write integer variable that controls the Link Layer Con- trol and Adaptation Protocol (L2CAP) Retransmission Timeout (RTX) (in seconds). Every time the L2CAP layer submits a control com- mand, the RTX timeout is set. The value of the RTX timeout should be greater or equal to the value of the HCI connection timeout. Be careful when changing this variable. Make sure you understand what you are doing. net.bluetooth.l2cap.ertx_timeout A read-write integer variable that controls the L2CAP Extended Retransmission Timeout (ERTX) (in seconds). In some cases remote peer may respond with PENDING status to the L2CAP control com- mand. In this case the L2CAP command timeout is reset to the ERTX timeout value. The value of the ERTX timeout should be greater or equal to the value of the RTX timeout. Be careful when changing this variable. Make sure you understand what you are doing. SEE ALSO sysctl(8), ng_hci(4), ng_l2cap(4), ng_btsocket(4) HISTORY The bluetooth module was implemented in FreeBSD 5.0. AUTHORS Maksim Yevmenkin <m_evmenkin@yahoo.com> FreeBSD 11.1 November 9, 2002 FreeBSD 11.1
NAME | SYNOPSIS | DESCRIPTION | BLUETOOTH VARIABLES | SEE ALSO | HISTORY | AUTHORS
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