1 files changed, 26 insertions, 0 deletions
diff --git a/okclient.c b/okclient.c
new file mode 100644
index 0000000..a648c02
--- /dev/null
+++ b/okclient.c
@@ -0,0 +1,26 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "str.h"
+#include "ip4.h"
+#include "okclient.h"
+
+static char fn[3 + IP4_FMT];
+
+int okclient(char ip[4])
+{
+  struct stat st;
+  int i;
+
+  fn[0] = 'i';
+  fn[1] = 'p';
+  fn[2] = '/';
+  fn[3 + ip4_fmt(fn + 3,ip)] = 0;
+
+  for (;;) {
+    if (stat(fn,&st) == 0) return 1;
+    /* treat temporary error as rejection */
+    i = str_rchr(fn,'.');
+    if (!fn[i]) return 0;
+    fn[i] = 0;
+  }
+}