Images may be saved by clicking on them.

-h

Print a summary of usage.

-v

Print additional details of packets captured to the terminal.

-i interface

Listen to packets on interface. By default, driftnet will try to pick up traffic on all interfaces, but this does not work with all versions of (3); on such systems, an interface must be specified. On some systems, driftnet can only use promiscuous mode if an interface is specified.

-p

Do not put the interface into promiscuous mode.

-a

Operate in `adjunct mode', where driftnet gathers images for use by another program, such as Jamie Zawinski's webcollage. In this mode, no window is displayed; images are captured and saved in a temporary directory, and their names written on standard output.

-m number

In adjunct mode, silently drop images if there are more than number in the temporary directory. It is assumed that another process will delete images which it has processed.

-x prefix

The filename prefix to use when saving images, by default `driftnet-'.

-d directory

Use directory to store temporary files. Driftnet will clear this directory of its own temporary files on exit, but will not delete the directory or any other files.

-s

Attempt to capture streamed audio data from the network, and either play it or, in adjunct mode, save it in files. At present this only works with MPEG data.

-S

Capture streamed audio data only, ignoring images.

-M command

Use the named command to play MPEG audio data. The command, which is executed using the shell, should accept MPEG frames on standard input. The default is `mpg123 -'.

filter code

Additional filter code to restrict the packets captured, in the libpcap syntax. User filter code is evaluated as `tcp and (filter code)'.