RandMAC() added. Generates a random mac address. (#479)

* Added a LastSeen value to session and added automatic updating of it. Also added an Active param to the Session struct and changed the logic to RemoveSession(s) functions to set this value to false instead of deleting it

* added RandMac

* changed case

* added docs

Author: lobsterjerusalem

random/random.go

@@ -87,6 +87,15 @@ func RandLettersRange(rangeMin int, rangeMax int) string {
 	return RandLetters(RandIntRange(rangeMin, rangeMax-1))
 }
 
+// RandMAC generates a random MAC address and returns it
+func RandMAC() string {
+	parts := []string{}
+	for range 6 {
+		parts = append(parts, RandHex(2))
+	}
+	return strings.Join(parts, ":")
+}
+
 func RandHex(n int) string {
 	runeSlice := make([]rune, n)
 	for i := range runeSlice {

random/random_test.go

@@ -155,6 +155,18 @@ func Test_RandDomain(t *testing.T) {
 	}
 }
 
+func Test_RandMAC(t *testing.T) {
+	for range 100 {
+		r := RandMAC()
+		if len(r) != 17 {
+			t.Error("Mac address generated with an unexpected length: " + r)
+		}
+		if !strings.Contains(r, ":") {
+			t.Error("Mac address generated without expected characters: " + r)
+		}
+	}
+}
+
 func Test_RandEmail(t *testing.T) {
 	for range 100 {
 		r := RandEmail()