compile hostapd noscan

README

$ mkdir -p ~/build/hostapd; cd ~/build/hostapd
$ apt-get install hostapd
$ apt-get source hostapd
$ apt-get build-dep hostapd

$ cd wpa-$VERSION
# patch hostapd/config_file.c, src/ap/ap_config.h, src/ap/hw_features.c and src/ap/ieee802_11_ht.c

$ dpkg-buildpackage -rfakeroot -uc -b
$ dpkg --unpack ../hostapd*.deb

noscan.patch

--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -3411,6 +3411,10 @@ static int hostapd_config_fill(struct ho
 			bss->ieee80211w = 1;
 #endif /* CONFIG_OCV */
 #ifdef CONFIG_IEEE80211N
+	} else if (os_strcmp(buf, "noscan") == 0) {
+		conf->noscan = atoi(pos);
+	} else if (os_strcmp(buf, "ht_coex") == 0) {
+		conf->no_ht_coex = !atoi(pos);
 	} else if (os_strcmp(buf, "ieee80211n") == 0) {
 		conf->ieee80211n = atoi(pos);
 	} else if (os_strcmp(buf, "ht_capab") == 0) {
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -934,6 +934,8 @@ struct hostapd_config {
 
 	int ht_op_mode_fixed;
 	u16 ht_capab;
+	int noscan;
+	int no_ht_coex;
 	int ieee80211n;
 	int secondary_channel;
 	int no_pri_sec_switch;
--- a/src/ap/hw_features.c
+++ b/src/ap/hw_features.c
@@ -477,7 +477,8 @@ static int ieee80211n_check_40mhz(struct
 	int ret;
 
 	/* Check that HT40 is used and PRI / SEC switch is allowed */
-	if (!iface->conf->secondary_channel || iface->conf->no_pri_sec_switch)
+	if (!iface->conf->secondary_channel || iface->conf->no_pri_sec_switch ||
+		iface->conf->noscan)
 		return 0;
 
 	hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
--- a/src/ap/ieee802_11_ht.c
+++ b/src/ap/ieee802_11_ht.c
@@ -252,6 +252,9 @@ void hostapd_2040_coex_action(struct hos
 		return;
 	}
 
+	if (iface->conf->noscan || iface->conf->no_ht_coex)
+		return;
+
 	if (len < IEEE80211_HDRLEN + 2 + sizeof(*bc_ie)) {
 		wpa_printf(MSG_DEBUG,
 			   "Ignore too short 20/40 BSS Coexistence Management frame");
@@ -412,6 +415,9 @@ void ht40_intolerant_add(struct hostapd_
 	if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
 		return;
 
+	if (iface->conf->noscan || iface->conf->no_ht_coex)
+		return;
+
 	wpa_printf(MSG_INFO, "HT: Forty MHz Intolerant is set by STA " MACSTR
 		   " in Association Request", MAC2STR(sta->addr));