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hostapd: Add AP DFS support

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Add DFS structures/events handlers, CAC handling, and radar detection.
By default, after radar is detected or the channel became unavailable, a
random channel will be chosen.

This patches are based on the original work by Boris Presman and
Victor Goldenshtein. Most of the DFS code is moved to a new dfs.c/dfs.h
files.

Cc: Boris Presman <boris.presman@ti.com>
Cc: Victor Goldenshtein <victorg@ti.com>

Signed-hostap: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-hostap: Janusz Dziedzic <janusz.dziedzic@tieto.com>
This commit is contained in:
Janusz Dziedzic 2013-10-15 20:27:25 +03:00 • committed by Jouni Malinen
parent dfe6ce4eeb
commit e76da50529
10 changed files with 423 additions and 10 deletions
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15
src/ap/hostapd.c
View file

@ -32,6 +32,7 @@
#include "ap_config.h"
#include "p2p_hostapd.h"
#include "gas_serv.h"
#include "dfs.h"
static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
@ -931,6 +932,9 @@ static int setup_interface(struct hostapd_iface *iface)
"be completed in a callback");
return 0;
}
if (iface->conf->ieee80211h)
wpa_printf(MSG_DEBUG, "DFS support is enabled");
}
return hostapd_setup_interface_complete(iface, 0);
}
@ -950,12 +954,23 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
wpa_printf(MSG_DEBUG, "Completing interface initialization");
if (hapd->iconf->channel) {
#ifdef NEED_AP_MLME
int res;
#endif /* NEED_AP_MLME */
iface->freq = hostapd_hw_get_freq(hapd, hapd->iconf->channel);
wpa_printf(MSG_DEBUG, "Mode: %s Channel: %d "
"Frequency: %d MHz",
hostapd_hw_mode_txt(hapd->iconf->hw_mode),
hapd->iconf->channel, iface->freq);
#ifdef NEED_AP_MLME
/* Check DFS */
res = hostapd_handle_dfs(hapd);
if (res <= 0)
return res;
#endif /* NEED_AP_MLME */
if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
hapd->iconf->channel,
hapd->iconf->ieee80211n,