How the management frames are sent to user space?

[hua law]

I traced the frame receive function calling link and finally in the
prism2_rx_80211() funciton I found the following lines:
  if (type == PRISM2_RX_MGMT && (fc & WLAN_FC_PVER)) {
printk(KERN_DEBUG "%s: dropped management frame with header "
"version %d\n", dev->name, fc & WLAN_FC_PVER);
dev_kfree_skb_any(skb);
return 0;
}
 the hostap version is 0.3.9
 I was informed that the management frames are been process by user space
deamon processes, but I can not guess out the implementation from the above
code.
 What the mechnism the hostap tranfering his management frames to the user
space?
 Help me please, Thanks.
 Best Regard
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