---
name: "ng_bt3c"
section: "4"
platform: "linux"
package: "freebsd-manpages"
version: "6.0-5"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/ng_bt3c"
---

# ng\_bt3c(4)

Netgraph node type that is also a 3Com Bluetooth PC card driver

## NAME

**ng\_bt3c** – Netgraph node type that is also a 3Com Bluetooth PC card driver

## SYNOPSIS

**#include \<sys/types.h\>**

**#include \<netgraph/bluetooth/include/ng\_bt3c.h\>**

## DESCRIPTION

The **btccc** node type is both a persistent Netgraph node type and a driver for the 3Com Bluetooth PC card (3CRWB6096-HP). It implements a Bluetooth HCI UART transport layer as per chapter H4 of the Bluetooth Specification Book v1.1. A new node is created when the card is plugged.

In order to use the card one *MUST* download the firmware first. Due to copyright issues the firmware cannot be provided with this driver. The firmware can be obtained from the Windows driver package that can be downloaded from the 3Com web site at no charge. The firmware name is *BT3CPCC.BIN*. To load the firmware into the card, use bt3cfw(8). I am using the original firmware that came with the card on CD-ROM.

```
MD5 (BT3CPCC.BIN) = 36170fda56ea9fdbf1702c966f8a97f1
```

For *OLDCARD* systems the entry in pccard.conf(5) might look like this:

```
# 3Com 3CRWB60-A Bluetooth PC Card
card "3COM" "3CRWB60-A" "Bluetooth PC Card"
        config	auto	"btccc" ?
	insert	/usr/sbin/bt3cfw -n $device -f /etc/BT3CPCC.bin
```

Do not forget to load the module and SIGHUP pccardd(8).

The node has a single hook called hook. Incoming bytes received on the device are re-assembled into HCI frames (according to the length). Full HCI frames are sent out on the hook. HCI frames received on hook are transmitted out. No modification to the data is performed in either direction.

## HARDWARE

The **ng\_bt3c** driver provides support for the 3Com/HP 3CRWB6096-A PCCARD bluetooth adapter.

## HOOKS

This node type supports the following hooks:

- hook

  single HCI frame contained in single *mbuf* structure.

## CONTROL MESSAGES

This node type supports the generic control messages, plus the following:

- NGM\_BT3C\_NODE\_GET\_STATE

  Returns the current receiving state for the node.

- NGM\_BT3C\_NODE\_GET\_DEBUG

  Returns an integer containing the current debug level for the node.

- NGM\_BT3C\_NODE\_SET\_DEBUG

  This command takes an integer argument and sets the current debug level for the node.

- NGM\_BT3C\_NODE\_GET\_QLEN

  This command takes a parameter that specifies queue number and returns the current length of the queue for the node.

- NGM\_BT3C\_NODE\_SET\_QLEN

  This command takes two parameters that specify the queue number and the maximum length of the queue and sets the maximum length of the queue for the node.

- NGM\_BT3C\_NODE\_GET\_STAT

  Returns various statistic information for the node, such as: number of bytes (frames) sent, number of bytes (frames) received and number of input (output) errors.

- NGM\_BT3C\_NODE\_RESET\_STAT

  Reset all statistic counters to zero.

- NGM\_BT3C\_NODE\_DOWNLOAD\_FIRMWARE

  Download card firmware.

## SHUTDOWN

This node shuts down when the corresponding card is un-plugged.

## SEE ALSO

[cardbus(4)](/cardbus/4.md), [netgraph(4)](/netgraph/4.md), [pccbb(4)](/pccbb/4.md), [pcic(4)](/pcic/4.md), pccard.conf(5), bt3cfw(8), [ngctl(8)](/ngctl/8.md), pccardc(8), pccardd(8)

## HISTORY

The **btccc** node type was implemented in FreeBSD 5.0.

## AUTHORS

Maksim Yevmenkin ⟨m\_evmenkin@yahoo.com⟩

## BUGS

The driver is based on information obtained from Jose Orlando Pereira ⟨jop@di.uminho.pt⟩ and disassembled the W2K driver.