Add required_with validation for gateway, startip, and endip fields in L2 network resource

Author: Damans227

cloudstack/resource_cloudstack_network.go

@@ -80,24 +80,27 @@ func resourceCloudStackNetwork() *schema.Resource {
 			},
 
 			"gateway": {
-				Type:     schema.TypeString,
-				Optional: true,
-				Computed: true,
-				ForceNew: true,
+				Type:         schema.TypeString,
+				Optional:     true,
+				Computed:     true,
+				ForceNew:     true,
+				RequiredWith: []string{"cidr"},
 			},
 
 			"startip": {
-				Type:     schema.TypeString,
-				Optional: true,
-				Computed: true,
-				ForceNew: true,
+				Type:         schema.TypeString,
+				Optional:     true,
+				Computed:     true,
+				ForceNew:     true,
+				RequiredWith: []string{"cidr"},
 			},
 
 			"endip": {
-				Type:     schema.TypeString,
-				Optional: true,
-				Computed: true,
-				ForceNew: true,
+				Type:         schema.TypeString,
+				Optional:     true,
+				Computed:     true,
+				ForceNew:     true,
+				RequiredWith: []string{"cidr"},
 			},
 
 			"network_domain": {
@@ -185,13 +188,13 @@ func resourceCloudStackNetworkCreate(d *schema.ResourceData, meta interface{}) e
 		p.SetDisplaytext(name)
 	}
 
-	// Get the network offering to check if it supports specifying IP ranges
-	no, _, err := cs.NetworkOffering.GetNetworkOfferingByID(networkofferingid)
-	if err != nil {
-		return err
-	}
-
 	if _, ok := d.GetOk("cidr"); ok {
+		// Get the network offering to check if it supports specifying IP ranges
+		no, _, err := cs.NetworkOffering.GetNetworkOfferingByID(networkofferingid)
+		if err != nil {
+			return err
+		}
+
 		m, err := parseCIDR(d, no.Specifyipranges)
 		if err != nil {
 			return err