Add mac address validator

src/ui/util.c

@@ -5,6 +5,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <time.h>
+#include <ctype.h>
 #include "util.h"
 
 int find_str(char *find, const char **array, int length) {
@@ -33,3 +34,30 @@ void rand_str(char *dest, size_t length) {
     }
     *dest = '\0';
 }
+
+
+int isValidMacAddress(const char* mac) {
+    int i = 0;
+    int s = 0;
+
+    while (*mac) {
+        if (isxdigit(*mac)) {
+            i++;
+        }
+        else if (*mac == ':' || *mac == '-') {
+
+            if (i == 0 || i / 2 - 1 != s)
+                break;
+
+            ++s;
+        }
+        else {
+            s = -1;
+        }
+
+
+        ++mac;
+    }
+
+    return (i == 12 && (s == 5 || s == 0));
+}

src/ui/util.h

@@ -7,5 +7,6 @@
 
 int find_str(char *find, const char **array, int length);
 void rand_str(char *dest, size_t length);
+int isValidMacAddress(const char*);
 
 #endif //WIHOTSPOT_UTIL_H