Add hostapd driver_params config parameter

This is mainly for development testing purposes to allow driver_nl80211
behavior to be modified.

Signed-off-by: Jouni Malinen <j@w1.fi>

hostapd/config_file.c

@@ -1867,6 +1867,9 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 				   line, pos);
 			return 1;
 		}
+	} else if (os_strcmp(buf, "driver_params") == 0) {
+		os_free(conf->driver_params);
+		conf->driver_params = os_strdup(pos);
 	} else if (os_strcmp(buf, "debug") == 0) {
 		wpa_printf(MSG_DEBUG, "Line %d: DEPRECATED: 'debug' configuration variable is not used anymore",
 			   line);

hostapd/hostapd.conf

@@ -24,6 +24,9 @@ interface=wlan0
 # not control any wireless/wired driver.
 # driver=hostap
 
+# Driver interface parameters (mainly for development testing use)
+# driver_params=<params>
+
 # hostapd event logger configuration
 #
 # Two output method: syslog and stdout (only usable if not forking to

hostapd/main.c

@@ -184,6 +184,7 @@ static int hostapd_driver_init(struct hostapd_iface *iface)
 	}
 	params.bssid = b;
 	params.ifname = hapd->conf->iface;
+	params.driver_params = hapd->iconf->driver_params;
 	params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 
 	params.num_bridge = hapd->iface->num_bss;

src/ap/ap_config.c

@@ -566,6 +566,7 @@ void hostapd_config_free(struct hostapd_config *conf)
 	os_free(conf->supported_rates);
 	os_free(conf->basic_rates);
 	os_free(conf->chanlist);
+	os_free(conf->driver_params);
 
 	os_free(conf);
 }

src/ap/ap_config.h

@@ -572,6 +572,7 @@ struct hostapd_config {
 	int *basic_rates;
 
 	const struct wpa_driver_ops *driver;
+	char *driver_params;
 
 	int ap_table_max_size;
 	int ap_table_expiration_time;

src/drivers/driver.h

@@ -1247,6 +1247,7 @@ struct wpa_init_params {
 	void *global_priv;
 	const u8 *bssid;
 	const char *ifname;
+	const char *driver_params;
 	int use_pae_group_addr;
 	char **bridge;
 	size_t num_bridge;

src/drivers/driver_nl80211.c

@@ -155,7 +155,8 @@ static int wpa_driver_nl80211_set_mode_ibss(struct i802_bss *bss,
 
 static int
 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
-				   const u8 *set_addr, int first);
+				   const u8 *set_addr, int first,
+				   const char *driver_params);
 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 				   const u8 *addr, int cmd, u16 reason_code,
 				   int local_state_change);
@@ -185,6 +186,7 @@ static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv);
 
 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 static int i802_set_iface_flags(struct i802_bss *bss, int up);
+static int nl80211_set_param(void *priv, const char *param);
 
 
 /* Converts nl80211_chan_width to a common format */
@@ -836,7 +838,7 @@ static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 	if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 		wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 			   "interface");
-		wpa_driver_nl80211_finish_drv_init(drv, NULL, 0);
+		wpa_driver_nl80211_finish_drv_init(drv, NULL, 0, NULL);
 		return 1;
 	}
 
@@ -1659,7 +1661,8 @@ static void nl80211_destroy_bss(struct i802_bss *bss)
 
 static void * wpa_driver_nl80211_drv_init(void *ctx, const char *ifname,
 					  void *global_priv, int hostapd,
-					  const u8 *set_addr)
+					  const u8 *set_addr,
+					  const char *driver_params)
 {
 	struct wpa_driver_nl80211_data *drv;
 	struct rfkill_config *rcfg;
@@ -1716,7 +1719,7 @@ static void * wpa_driver_nl80211_drv_init(void *ctx, const char *ifname,
 	if (linux_iface_up(drv->global->ioctl_sock, ifname) > 0)
 		drv->start_iface_up = 1;
 
-	if (wpa_driver_nl80211_finish_drv_init(drv, set_addr, 1))
+	if (wpa_driver_nl80211_finish_drv_init(drv, set_addr, 1, driver_params))
 		goto failed;
 
 	drv->eapol_tx_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
@@ -1765,7 +1768,8 @@ failed:
 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname,
 				      void *global_priv)
 {
-	return wpa_driver_nl80211_drv_init(ctx, ifname, global_priv, 0, NULL);
+	return wpa_driver_nl80211_drv_init(ctx, ifname, global_priv, 0, NULL,
+					   NULL);
 }
 
 
@@ -2188,7 +2192,8 @@ static int i802_set_iface_flags(struct i802_bss *bss, int up)
 
 static int
 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
-				   const u8 *set_addr, int first)
+				   const u8 *set_addr, int first,
+				   const char *driver_params)
 {
 	struct i802_bss *bss = drv->first_bss;
 	int send_rfkill_event = 0;
@@ -2209,6 +2214,9 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
 	if (wpa_driver_nl80211_capa(drv))
 		return -1;
 
+	if (driver_params && nl80211_set_param(bss, driver_params) < 0)
+		return -1;
+
 	wpa_printf(MSG_DEBUG, "nl80211: interface %s in phy %s",
 		   bss->ifname, drv->phyname);
 
@@ -6401,7 +6409,7 @@ static void *i802_init(struct hostapd_data *hapd,
 
 	bss = wpa_driver_nl80211_drv_init(hapd, params->ifname,
 					  params->global_priv, 1,
-					  params->bssid);
+					  params->bssid, params->driver_params);
 	if (bss == NULL)
 		return NULL;