android: bind v4 server to real interface IP instead of 0.0.0.0

confdefs.h

@@ -0,0 +1,28 @@
+/* confdefs.h */
+#define PACKAGE_NAME "utun"
+#define PACKAGE_TARNAME "utun"
+#define PACKAGE_VERSION "2.0.0"
+#define PACKAGE_STRING "utun 2.0.0"
+#define PACKAGE_BUGREPORT "https://github.com/anomalyco/utun3/issues"
+#define PACKAGE_URL ""
+#define PACKAGE "utun"
+#define VERSION "2.0.0"
+#define USE_OPENSSL 1
+#define HAVE_ARPA_INET_H 1
+#define HAVE_FCNTL_H 1
+#define HAVE_LIMITS_H 1
+#define HAVE_NETINET_IN_H 1
+#define HAVE_STDINT_H 1
+#define HAVE_STDLIB_H 1
+#define HAVE_STRING_H 1
+#define HAVE_SYS_IOCTL_H 1
+#define HAVE_SYS_SOCKET_H 1
+#define HAVE_UNISTD_H 1
+#define HAVE_MALLOC 1
+#define HAVE_GETTIMEOFDAY 1
+#define HAVE_MEMSET 1
+#define HAVE_SOCKET 1
+#define HAVE_STRCHR 1
+#define HAVE_STRDUP 1
+#define HAVE_STRERROR 1
+#define HAVE_STRSTR 1

conftest.mk

@@ -0,0 +1,2 @@
+conftest.ts1: conftest.ts2
+	touch conftest.ts2

tools/chatgui-android/app/src/main/java/com/utun/chat/data/ConfigProvider.kt

@@ -307,7 +307,7 @@ class ConfigProvider(private val context: Context) {
             for (srv in servers) {
                 val family = if (srv.bindIp.contains(":")) "v6" else "v4"
                 appendLine("[server:${srv.ifName}_$family]")
-                appendLine("addr=${if (family == "v6") "[::]" else "0.0.0.0"}:${srv.port}")
+                appendLine("addr=${if (family == "v6") "[::]" else srv.bindIp.ifBlank { "0.0.0.0" }}:${srv.port}")
                 appendLine("type=public")
                 appendLine("transport=${srv.protocol}")
                 if (family == "v6") appendLine("netif=${srv.ifName}")