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Created July 23, 2026 20:13
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[debian] noscan patch for hostapd (wpa)
Description: allows 40MHz wide channels with IEEE 802.11n (HT)
Author: Viktor Drobot <linux776@gmail.com>
Origin: AUR, https://aur.archlinux.org/cgit/aur.git/tree/noscan.patch?h=hostapd-noscan&id=99cd5aa37f73a4d238319b0976b6890ebc5546b8
Bug: https://aur.archlinux.org/packages/hostapd-noscan
Last-Update: 2022-01-19
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
Index: wpa-2.10/hostapd/config_file.c
===================================================================
--- wpa-2.10.orig/hostapd/config_file.c
+++ wpa-2.10/hostapd/config_file.c
@@ -2906,6 +2906,8 @@ static int hostapd_config_fill(struct ho
line, bss->wpa_deny_ptk0_rekey);
return 1;
}
+ } else if (os_strcmp(buf, "noscan") == 0) {
+ conf->noscan = atoi(pos);
} else if (os_strcmp(buf, "wpa_group_update_count") == 0) {
char *endp;
unsigned long val = strtoul(pos, &endp, 0);
@@ -3474,6 +3476,8 @@ static int hostapd_config_fill(struct ho
if (bss->ocv && !bss->ieee80211w)
bss->ieee80211w = 1;
#endif /* CONFIG_OCV */
+ } else if (os_strcmp(buf, "noscan") == 0) {
+ conf->noscan = atoi(pos);
} else if (os_strcmp(buf, "ieee80211n") == 0) {
conf->ieee80211n = atoi(pos);
} else if (os_strcmp(buf, "ht_capab") == 0) {
Index: wpa-2.10/src/ap/ap_config.h
===================================================================
--- wpa-2.10.orig/src/ap/ap_config.h
+++ wpa-2.10/src/ap/ap_config.h
@@ -1014,6 +1014,7 @@ struct hostapd_config {
int ht_op_mode_fixed;
u16 ht_capab;
+ int noscan;
int ieee80211n;
int secondary_channel;
int no_pri_sec_switch;
Index: wpa-2.10/src/ap/hw_features.c
===================================================================
--- wpa-2.10.orig/src/ap/hw_features.c
+++ wpa-2.10/src/ap/hw_features.c
@@ -517,7 +517,7 @@ 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);
@@ -915,7 +915,7 @@ static int hostapd_is_usable_chans(struc
if (!hostapd_is_usable_edmg(iface))
return 0;
- if (!iface->conf->secondary_channel)
+ if (!iface->conf->secondary_channel || iface->conf->noscan)
return 1;
if (hostapd_is_usable_chan(iface, iface->freq +
Index: wpa-2.10/src/ap/ieee802_11_ht.c
===================================================================
--- wpa-2.10.orig/src/ap/ieee802_11_ht.c
+++ wpa-2.10/src/ap/ieee802_11_ht.c
@@ -230,6 +230,9 @@ void hostapd_2040_coex_action(struct hos
return;
}
+ if (iface->conf->noscan)
+ return;
+
if (len < IEEE80211_HDRLEN + 2 + sizeof(*bc_ie)) {
wpa_printf(MSG_DEBUG,
"Ignore too short 20/40 BSS Coexistence Management frame");
@@ -390,6 +393,9 @@ void ht40_intolerant_add(struct hostapd_
if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
return;
+ if (iface->conf->noscan)
+ return;
+
wpa_printf(MSG_INFO, "HT: Forty MHz Intolerant is set by STA " MACSTR
" in Association Request", MAC2STR(sta->addr));
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