DNS Samples now call uip_dns_shutdown() when down with DNS

Author: GregEigsti

examples/SocketAppDNS/SocketAppDNS.pde

@@ -100,6 +100,9 @@ extern "C" {
       else {
          Serial.println("DNS query failed");
       }
+      
+       // Shutdown DNS
+       uip_dns_shutdown();
    }
 
    // These uIP callbacks are unused for the purposes of this simple DNS example

examples/WiFiScan/WiFiScan.pde

@@ -311,6 +311,9 @@ extern "C" {
 
          if(20 < udpRetry++) {
             Serial.println("DNS TIMEOUT FALLBACK");
+            // Shutdown DNS
+            uip_dns_shutdown();
+            // Send TCP packet
             uip_ipaddr(srvaddr, 71,231,196,153);
             uip_connect(&srvaddr, HTONS(7995));
             tcpRetry = 0;
@@ -486,6 +489,9 @@ extern "C" {
          uip_ipaddr(srvaddr, 71,231,196,153);
       }
 
+      // Shutdown DNS
+      uip_dns_shutdown();
+      // Send TCP packet
       uip_connect(&srvaddr, HTONS(7995));
       tcpRetry = 0;
       phase = PHASERUN;         

examples/WiServerDNS/WiServerDNS.pde

@@ -41,7 +41,6 @@ unsigned char security_passphrase_len;
 // End of wireless configuration parameters ----------------------------------------
 
 
-
 // Flag to know when the DNS query has completed
 boolean dnsCalledBack = false;
 
@@ -92,10 +91,13 @@ void setup() {
 // Time (in millis) when the data should be retrieved 
 long updateTime = 0;
 
-void loop(){
-
+void loop()
+{
   // Check if it's time to get an update
   if (true == dnsCalledBack && millis() >= updateTime) {
+    // Shutdown DNS
+    uip_dns_shutdown();
+    // Call WiServer to fetch a page
     getWeather.submit();    
     // Get another update one hour from now
     updateTime += 1000 * 60 * 60;