Netlink communication between hostapd and hostap,nl80211
Fri Apr 3 09:28:01 PDT 2009
On Fri, 2009-04-03 at 16:13 +0800, Kerht wrote:
> 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".
send() is a libc function. Run "info send" to read about it.
> It seems the msg is not in generic netlink format.
> Isn't it?
It's not. It's just sending data through a socket. driver_hostap.c
doesn't use netlink. driver_nl80211.c does.
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