Remove stuff that came from a different app when this was derived.

Prepare to add DNSServer for captive portal.

Firmware/Utility.cpp

@@ -7,23 +7,51 @@
 
 #include "Utility.h"
 
-static String macToStr(const uint8_t * mac);
+static String macToStr(const uint8_t * mac, char padd = ':');
 
-String GetMacString() {
+String GetMacString(char padd) {
   unsigned char mac[6];
   WiFi.macAddress(mac);
-  String clientMac(macToStr(mac));
+  String clientMac(macToStr(mac, padd));
   return clientMac;
 }
 
-String macToStr(const uint8_t * mac) {
+static String macToStr(const uint8_t * mac, char padd) {
   String result;
 
   for (int i = 0; i < 6; ++i) {
     result += String(mac[i], 16);
-    if (i < 5)
-      result += ':';
+    if (i < 5) {
+      if (padd)
+		  result += padd;
+	}
   }
   return result;
 }
 
+void HexDump(const char * title, const uint8_t * p, int count)
+{
+    int i;
+    char buf[100] = "0000: ";
+	char asc[17] = "                ";
+
+    if (*title) {
+        printf("%s [@%08X]\n", title, (uint32_t)p);
+	}
+    for (i=0; i<count; ) {
+        sprintf(buf + strlen(buf), "%02X ", *(p+i));
+		asc[i % 16] = isprint(*(p+i)) ? *(p+i) : '.';
+        if ((++i & 0x0F) == 0x00) {
+            printf("%-55s | %s |\n", buf, asc);
+            if (i < count) {
+                sprintf(buf, "%04X: ", i);
+            } else {
+                buf[0] = '\0';
+				asc[0] = '\0';
+			}
+        }
+    }
+    if (strlen(buf)) {
+        printf("%-55s | %s |\n", buf, asc);
+	}
+}