Netlink communication between hostapd and hostap,nl80211

[Kerht]

Hi
I am puzzling about hte netlink usage in hostapd.
I saw below code in hostapd:
static int hostap_send_mgmt_frame(void *priv, const void *msg, size_t len,
                  int flags)
{
    struct hostap_driver_data *drv = priv;
    struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) msg;
    int res;

    /* Request TX callback */
    hdr->frame_control |= host_to_le16(BIT(1));
    res = send(drv->sock, msg, len, flags);
    hdr->frame_control &= ~host_to_le16(BIT(1));

    return res;
}

Then I did not find which part of hostap or nl80211 can handle this "sned".
It seems the msg is not in generic netlink format.
Isn't it?

Thanks
Keithr



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