Fix CONFIG_CTRL_IFACE=udp6/udp6-remote builds

wpa_supplicant_global_ctrl_iface_receive() did not handle the from
address properly for the IPv6 case. This was broken by commit
d60886cdafbf839be05ca5f7d4877565d4958a44 ('wpa_supplicant: Add monitor
support for global UDP ctrl_iface').

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

wpa_supplicant/ctrl_iface_udp.c

@@ -1,6 +1,6 @@
 /*
  * WPA Supplicant / UDP socket -based control interface
- * Copyright (c) 2004-2005, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2004-2016, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -602,7 +602,11 @@ static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
 	struct ctrl_iface_global_priv *priv = sock_ctx;
 	char buf[256], *pos;
 	int res;
+#ifdef CONFIG_CTRL_IFACE_UDP_IPV6
+	struct sockaddr_in6 from;
+#else /* CONFIG_CTRL_IFACE_UDP_IPV6 */
 	struct sockaddr_in from;
+#endif /* CONFIG_CTRL_IFACE_UDP_IPV6 */
 	socklen_t fromlen = sizeof(from);
 	char *reply = NULL;
 	size_t reply_len;
@@ -617,6 +621,7 @@ static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
 	}
 
 #ifndef CONFIG_CTRL_IFACE_UDP_REMOTE
+#ifndef CONFIG_CTRL_IFACE_UDP_IPV6
 	if (from.sin_addr.s_addr != htonl((127 << 24) | 1)) {
 		/*
 		 * The OS networking stack is expected to drop this kind of
@@ -628,6 +633,7 @@ static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
 			   "source %s", inet_ntoa(from.sin_addr));
 		return;
 	}
+#endif /* CONFIG_CTRL_IFACE_UDP_IPV6 */
 #endif /* CONFIG_CTRL_IFACE_UDP_REMOTE */
 
 	buf[res] = '\0';