TUNTAP PDU

Creates TUNTAP interface and translates traffic to PDUs. See TUN/TAP for an explanation of the functions.

When the TUN option is chosen, a virtual ethernet interface is allocated to the specified Interface name (tun). It's IP address can then be set by:

sudo ifconfig tun 192.168.200.1

or:

sudo ip addr add dev tun 192.168.200.1/24
sudo ip link set dev tun up

GNU Radio needs root privileges to use this block.

Alternatively, the "ip" command can be used beforehand to create a persistent tun or tap interface owned by the user. The following commands set up a persistent tap interface named tap0 with an IP address of 192.168.200.1:

sudo ip tuntap add dev tap0 mode tap user $USER
sudo ip addr add dev tap0 192.168.200.1/24
sudo ip link set dev tap0 up

Once these commands are run, GNU Radio no longer needs root privileges to use this block.

Afterwards, to delete the tap0 interface:

sudo ip tuntap del dev tap0 mode tap

Note for 3.10 This block has been moved from gr-blocks to gr-network, which causes a name change of the id. See Porting_Existing_Flowgraphs_to_a_Newer_Version for details.

Parameters

Interface name

Device name to create

MTU

Maximum Transmission Unit size

Flag

Flag to indicate TUN or Tap

Example Flowgraph

This flowgraph can be downloaded from Media:Tuntap_pdu.grc.

Source Files

C++ files

TODO

Header files

TODO

Public header files

TODO

Block definition

TODO