fix #274

src/server.c

@@ -34,6 +34,7 @@
 #include <time.h>
 #include <unistd.h>
 #include <getopt.h>
+#include <math.h>
 
 #ifndef __MINGW32__
 #include <netdb.h>
@@ -176,7 +177,16 @@ int create_and_bind(const char *host, const char *port)
     hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG; /* For wildcard IP address */
     hints.ai_protocol = IPPROTO_TCP;
 
-    s = getaddrinfo(host, port, &hints, &result);
+    for (int i = 0; i < 8; i++) {
+        s = getaddrinfo(host, port, &hints, &result);
+        if (s == 0) break;
+        else {
+            sleep(pow(2, i));
+            LOGE("failed to resolve server name, wait for %.0fs", pow(2, i));
+        }
+
+    }
+
     if (s != 0) {
         LOGE("getaddrinfo: %s", gai_strerror(s));
         return -1;