nl80211_driver: add private commands to use dropbcast

Add DRIVER DROPBCAST {GET,ENABLE,DISABLE} commands to show the current
setting, enable and disable the feature of dropping all broadcast
packets while in suspend mode.

Signed-off-by: Luciano Coelho <coelho@ti.com>

src/drivers/driver_nl80211.c

@@ -7409,6 +7409,62 @@ static int nl80211_set_wowlan_triggers(struct i802_bss *bss, int enable)
 	return ret;
 }
 
+static int nl80211_toggle_dropbcast(int enable)
+{
+	char filename[90];
+	int rv;
+	FILE *f;
+
+	snprintf(filename, sizeof(filename) - 1,
+		 "/sys/bus/platform/devices/wl12xx/drop_bcast");
+	f = fopen(filename, "w");
+	if (f < 0) {
+		wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
+			   filename, strerror(errno));
+		return -1;
+	}
+
+	rv = fprintf(f, "%d", enable);
+	fclose(f);
+	if (rv < 1) {
+		wpa_printf(MSG_DEBUG, "Could not write to file %s: %s",
+			   filename, strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+static int nl80211_dropbcast_get(char *buf, size_t buf_len)
+{
+	char filename[90], value[10], *pos;
+	int f, rv;
+
+	snprintf(filename, sizeof(filename) - 1,
+		 "/sys/bus/platform/devices/wl12xx/drop_bcast");
+	f = open(filename, O_RDONLY);
+	if (f < 0) {
+		wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
+			   filename, strerror(errno));
+		return -1;
+	}
+
+	rv = read(f, value, sizeof(value) - 1);
+	close(f);
+	if (rv < 0) {
+		wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
+			   filename, strerror(errno));
+		return -1;
+	}
+
+	value[rv] = '\0';
+	pos = os_strchr(value, '\n');
+	if (pos)
+		*pos = '\0';
+
+	return snprintf(buf, buf_len, "Drop bcast = %s\n", value);
+}
+
 #endif /* ANDROID */
 
 static int nl80211_add_pmkid(void *priv, const u8 *bssid, const u8 *pmkid)
@@ -7595,6 +7651,24 @@ static int nl80211_priv_driver_cmd( void *priv, char *cmd, char *buf, size_t buf
 		return nl80211_set_wowlan_triggers(bss, 1);
 	} else if( os_strcasecmp(cmd, "RXFILTER-STOP") == 0 ) {
 		return nl80211_set_wowlan_triggers(bss, 0);
+	} else if( os_strncasecmp(cmd, "DROPBCAST", 9) == 0 ) {
+		char *value = cmd + 10;
+
+		if (!os_strcasecmp(value, "ENABLE") ||
+		    !os_strcasecmp(value, "1")) {
+			ret = nl80211_toggle_dropbcast(1);
+		} else if (!os_strcasecmp(value, "DISABLE") ||
+			   !os_strcasecmp(value, "0")) {
+			ret = nl80211_toggle_dropbcast(0);
+		} else if (!os_strcasecmp(value, "GET") ||
+			   !os_strlen(value)) {
+			ret = nl80211_dropbcast_get(buf, buf_len);
+		} else {
+			wpa_printf(MSG_ERROR,
+				   "Invalid parameter for DROPBCAST: %s",
+				   value);
+			ret = -1;
+		}
 	} else {
 		wpa_printf(MSG_ERROR, "Unsupported command: %s", cmd);
 		ret = -1;