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authorJouni Malinen <j@w1.fi>2015-09-05 14:53:15 (GMT)
committerJouni Malinen <j@w1.fi>2015-09-05 14:53:15 (GMT)
commit964f64e2eebef06c7fab5c51f79ebc821e00b25e (patch)
tree9bad26f8c86f45eed02bc00a049b25861f948a46 /src
parentc58b5f65b12d88e118fdea2647bdd3f86d3e3daa (diff)
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Add option to ignore Probe Request frames on 2.4 GHz from dualband STA
The new no_probe_resp_if_seen_on=<ifname> parameter can now be used to configure hostapd to not reply to group-addressed Probe Request from a station that was seen on another radio. This can be used with enabled track_sta_max_num configuration on another interface controlled by the same hostapd process to restrict Probe Request frame handling from replying to group-addressed Probe Request frames from a station that has been detected to be capable of operating on another band, e.g., to try to reduce likelihood of the station selecting a 2.4 GHz BSS when the AP operates both a 2.4 GHz and 5 GHz BSS concurrently. Note: Enabling this can cause connectivity issues and increase latency for discovering the AP. Signed-off-by: Jouni Malinen <j@w1.fi>
Diffstat (limited to 'src')
-rw-r--r--src/ap/ap_config.c2
-rw-r--r--src/ap/ap_config.h2
-rw-r--r--src/ap/beacon.c35
3 files changed, 39 insertions, 0 deletions
diff --git a/src/ap/ap_config.c b/src/ap/ap_config.c
index be2fa8b..96f8651 100644
--- a/src/ap/ap_config.c
+++ b/src/ap/ap_config.c
@@ -566,6 +566,8 @@ void hostapd_config_free_bss(struct hostapd_bss_config *conf)
wpabuf_free(conf->own_ie_override);
#endif /* CONFIG_TESTING_OPTIONS */
+ os_free(conf->no_probe_resp_if_seen_on);
+
os_free(conf);
}
diff --git a/src/ap/ap_config.h b/src/ap/ap_config.h
index 3434214..d821f27 100644
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -554,6 +554,8 @@ struct hostapd_bss_config {
int radio_measurements;
int vendor_vht;
+
+ char *no_probe_resp_if_seen_on;
};
diff --git a/src/ap/beacon.c b/src/ap/beacon.c
index 46fff82..651ee74 100644
--- a/src/ap/beacon.c
+++ b/src/ap/beacon.c
@@ -622,6 +622,29 @@ static void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
}
+static int sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
+ const char *ifname)
+{
+ struct hapd_interfaces *interfaces = iface->interfaces;
+ size_t i, j;
+
+ for (i = 0; i < interfaces->count; i++) {
+ iface = interfaces->iface[i];
+ for (j = 0; j < iface->num_bss; j++) {
+ struct hostapd_data *hapd = iface->bss[j];
+
+ if (os_strcmp(ifname, hapd->conf->iface) == 0)
+ break;
+ }
+
+ if (j < iface->num_bss && sta_track_get(iface, addr))
+ return 1;
+ }
+
+ return 0;
+}
+
+
void handle_probe_req(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt, size_t len,
int ssi_signal)
@@ -787,6 +810,18 @@ void handle_probe_req(struct hostapd_data *hapd,
/* TODO: verify that supp_rates contains at least one matching rate
* with AP configuration */
+ if (hapd->conf->no_probe_resp_if_seen_on &&
+ is_multicast_ether_addr(mgmt->da) &&
+ is_multicast_ether_addr(mgmt->bssid) &&
+ sta_track_seen_on(hapd->iface, mgmt->sa,
+ hapd->conf->no_probe_resp_if_seen_on)) {
+ wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
+ " since STA has been seen on %s",
+ hapd->conf->iface, MAC2STR(mgmt->sa),
+ hapd->conf->no_probe_resp_if_seen_on);
+ return;
+ }
+
#ifdef CONFIG_TESTING_OPTIONS
if (hapd->iconf->ignore_probe_probability > 0.0 &&
drand48() < hapd->iconf->ignore_probe_probability) {