---
name: "l2test"
section: "1"
platform: "linux"
package: "bluez"
version: "5.82-1.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/l2test"
---

# l2test(1)

L2CAP testing tool

## NAME

l2test - L2CAP testing tool

## DESCRIPTION

l2test - L2CAP testing tool Usage:

-

  l2test \<mode\> \[options\] \[bdaddr\]

### Modes:

**-r** listen and receive

**-w** listen and send

**-d** listen and dump incoming data

**-x** listen, then send, then dump incoming data

**-t** listen, then send and receive at the same time

**-q** connect, then send and receive at the same time

**-s** connect and send

**-u** connect and receive

**-n** connect and be silent

**-y** connect, then send, then dump incoming data

**-c** connect, disconnect, connect, ...

**-m** multiple connects

**-p** trigger dedicated bonding

**-z** information request

## OPTIONS

-

  \[-b bytes\] \[-i device\] \[-P psm\] \[-J cid\] \[-I imtu\] \[-O omtu\] \[-L seconds\] enable SO\_LINGER \[-W seconds\] enable deferred setup \[-B filename\] use data packets from file \[-N num\] send num frames (default = infinite) \[-C num\] send num frames before delay (default = 1) \[-D milliseconds\] delay after sending num frames (default = 0) \[-K milliseconds\] delay before receiving (default = 0) \[-g milliseconds\] delay before disconnecting (default = 0) \[-X mode\] l2cap mode (help for list, default = basic) \[-a policy\] chan policy (help for list, default = bredr) \[-F fcs\] use CRC16 check (default = 1) \[-Q num\] Max Transmit value (default = 3) \[-Z size\] Transmission Window size (default = 63) \[-Y priority\] socket priority \[-H size\] Maximum receive buffer size \[-R\] reliable mode \[-G\] use connectionless channel (datagram) \[-U\] use sock stream \[-A\] request authentication \[-E\] request encryption \[-S\] secure connection \[-M\] become master \[-T\] enable timestamps \[-V type\] address type (help for list, default = bredr) \[-e seq\] initial sequence value (default = 0)

### Usage:

-

  l2test \<mode\> \[options\] \[bdaddr\]

### Modes:

**-r** listen and receive

**-w** listen and send

**-d** listen and dump incoming data

**-x** listen, then send, then dump incoming data

**-t** listen, then send and receive at the same time

**-q** connect, then send and receive at the same time

**-s** connect and send

**-u** connect and receive

**-n** connect and be silent

**-y** connect, then send, then dump incoming data

**-c** connect, disconnect, connect, ...

**-m** multiple connects

**-p** trigger dedicated bonding

**-z** information request

-

  \[-b bytes\] \[-i device\] \[-P psm\] \[-J cid\] \[-I imtu\] \[-O omtu\] \[-L seconds\] enable SO\_LINGER \[-W seconds\] enable deferred setup \[-B filename\] use data packets from file \[-N num\] send num frames (default = infinite) \[-C num\] send num frames before delay (default = 1) \[-D milliseconds\] delay after sending num frames (default = 0) \[-K milliseconds\] delay before receiving (default = 0) \[-g milliseconds\] delay before disconnecting (default = 0) \[-X mode\] l2cap mode (help for list, default = basic) \[-a policy\] chan policy (help for list, default = bredr) \[-F fcs\] use CRC16 check (default = 1) \[-Q num\] Max Transmit value (default = 3) \[-Z size\] Transmission Window size (default = 63) \[-Y priority\] socket priority \[-H size\] Maximum receive buffer size \[-R\] reliable mode \[-G\] use connectionless channel (datagram) \[-U\] use sock stream \[-A\] request authentication \[-E\] request encryption \[-S\] secure connection \[-M\] become master \[-T\] enable timestamps \[-V type\] address type (help for list, default = bredr) \[-e seq\] initial sequence value (default = 0)