USB support in libpcap

["Jon Smirl" <jonsmirl () gmail com>]

Attached is some clean up for libpcap support of usbmon on Linux.

It also adds code to enumerate the configurations of the devices
attached to the USB bus when the capture session is first started.
Without capturing the device configurations into the capture stream is
it not possible to fully decode the stream data.

For example wifi adapters are all built using proprietary USB
messages, to decode these messages you need to know the USB device ID
of the adapter. This device id is not normally in the capture stream
of the adapter. The attached code will force this data into the stream
when capture is first started so that an app like Wireshark has the
needed data to full decode the stream.

--
Jon Smirl
jonsmirl () gmail com

Attachment: libpcap.diff
Description:

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