Per-Frame MCS Control for Injected Frames

[wizath]

Hardware/Software

• Module: NRC7292
• Firmware: uni_s1g.bin
• Driver: nrc7292_sw_pkg
• Version: v1.5.2

Issue

When injecting raw 802.11 frames in monitor mode, there is no way to specify the MCS rate per-frame or at all. All injected frames are transmitted at a fixed MCS regardless of what is requested. We tried to add the per-packet-MCS settings but that did not work. After that we tried setting mcs default for all frames but still no luck:

else if(sta_type == WIM_STA_TYPE_MONITOR) {
    nrc_wim_set_rc_mode(nw, skb, sta_rc_mode);
    nrc_wim_set_default_mcs(nw, skb, sta_rc_default_mcs);
}

But the packets received still had wrong MCS. Do the firmware support specifying the MCS rate when injecting the frames? If not could it be done (the firmware one, I can handle the driver)