wpa_supplicant: extend set_network to allow string variables to be unset.

To unset a variable, use NULL without quotation as the value in set_network.

Back ported from wpa_supplicant 0.6.x b56c0546b7e46f221d751ef7390fbfec607254e2.

1 files changed, 9 insertions, 0 deletions

diff --git a/config.c b/config.c
index e5aeac2..a1112b7 100644
--- a/config.c
+++ b/config.c
@@ -91,6 +91,14 @@ static int wpa_config_parse_str(const struct parse_data *data,
 	size_t res_len, *dst_len;
 	char **dst, *tmp;
 
+	if (os_strcmp(value, "NULL") == 0) {
+		wpa_printf(MSG_DEBUG, "Unset configuration string '%s'",
+			   data->name);
+		tmp = NULL;
+		res_len = 0;
+		goto set;
+	}
+
 	tmp = wpa_config_parse_string(value, &res_len);
 	if (tmp == NULL) {
 		wpa_printf(MSG_ERROR, "Line %d: failed to parse %s '%s'.",
@@ -123,6 +131,7 @@ static int wpa_config_parse_str(const struct parse_data *data,
 		return -1;
 	}
 
+set:
 	dst = (char **) (((u8 *) ssid) + (long) data->param1);
 	dst_len = (size_t *) (((u8 *) ssid) + (long) data->param2);
 	os_free(*dst);