AirPcap is the first open, affordable, and easy-to-deploy WLAN (802.11b/g) packet capture solution for the Windows platform. Building or securing wireless networks can be a challenge when your tools don't understand radio waves. AirPcap enables troubleshooting tools like Wireshark to provide information about wireless protocols and radio signals. It enables you to capture and analyze low-level 802.11b/g wireless traffic, including control frames, management frames, and power information, using Wireshark.
AirPcapTx retains all of the functionality of AirPcap and additionally supports packet injection.