feat: Add IP neighbor discovery resource

Closes  #388

routeros/mikrotik_serialize.go

@@ -60,9 +60,9 @@ func isEmpty(propName string, schemaProp *schema.Schema, d *schema.ResourceData,
 		}
 		return confValue.IsNull()
 	case schema.TypeList:
-		return len(v.([]interface{})) == 0
+		return len(v.([]interface{})) == 0 && confValue.IsNull()
 	case schema.TypeSet:
-		return v.(*schema.Set).Len() == 0
+		return v.(*schema.Set).Len() == 0 && confValue.IsNull()
 	case schema.TypeMap:
 		return len(v.(map[string]interface{})) == 0
 	default:

routeros/provider.go

@@ -98,6 +98,7 @@ func Provider() *schema.Provider {
 			"routeros_ip_dns":                          ResourceDns(),
 			"routeros_ip_dns_record":                   ResourceDnsRecord(),
 			"routeros_ip_service":                      ResourceIpService(),
+			"routeros_ip_neighbor_discovery_settings":  ResourceIpNeighborDiscoverySettings(),
 			"routeros_ipv6_address":                    ResourceIPv6Address(),
 			"routeros_ipv6_dhcp_client":                ResourceIPv6DhcpClient(),
 			"routeros_ipv6_dhcp_client_option":         ResourceIPv6DhcpClientOption(),

routeros/resource_system_ip_neighbor_discovery.go

@@ -0,0 +1,79 @@
+package routeros
+
+import (
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
+)
+
+/*
+{
+  "discover-interface-list": "LAN",
+  "lldp-med-net-policy-vlan": "disabled",
+  "mode": "tx-and-rx",
+  "protocol": "cdp,lldp,mndp"
+}
+*/
+
+// https://help.mikrotik.com/docs/display/ROS/MAC+server
+func ResourceIpNeighborDiscoverySettings() *schema.Resource {
+	resSchema := map[string]*schema.Schema{
+		MetaResourcePath: PropResourcePath("/ip/neighbor/discovery-settings"),
+		MetaId:           PropId(Id),
+
+		"discover_interface_list": {
+			Type:             schema.TypeString,
+			Optional:         true,
+			Description:      "Interface list on which members the discovery protocol will run on.",
+			DiffSuppressFunc: AlwaysPresentNotUserProvided,
+		},
+		"lldp_med_net_policy_vlan": {
+			Type:     schema.TypeString,
+			Optional: true,
+			Description: `Advertised VLAN ID for LLDP-MED Network Policy TLV. This allows assigning a VLAN ID for 
+			LLDP-MED capable devices, such as VoIP phones. The TLV will only be added to interfaces where LLDP-MED 
+			capable devices are discovered. Other TLV values are predefined and cannot be changed:
+
+			- Application Type - Voice
+			- VLAN Type - Tagged
+			- L2 Priority - 0
+			- DSCP Priority - 0
+		
+		When used together with the bridge interface, the (R/M)STP protocol should be enabled with protocol-mode setting. 
+		
+		Additionally, other neighbor discovery protocols (e.g. CDP) should be excluded using protocol setting to 
+		avoid LLDP-MED misconfiguration.`,
+			DiffSuppressFunc: AlwaysPresentNotUserProvided,
+		},
+		"mode": {
+			Type:     schema.TypeString,
+			Optional: true,
+			Description: "Selects the neighbor discovery packet sending and receiving mode. The setting is " +
+				"available since RouterOS version 7.7.",
+			ValidateFunc:     validation.StringInSlice([]string{"rx-only", "tx-only", "tx-and-rx"}, false),
+			DiffSuppressFunc: AlwaysPresentNotUserProvided,
+		},
+		"protocol": {
+			Type:        schema.TypeSet,
+			Optional:    true,
+			Description: "List of used discovery protocols.",
+			Elem: &schema.Schema{
+				Type:         schema.TypeString,
+				ValidateFunc: validation.StringInSlice([]string{"cdp", "lldp", "mndp"}, false),
+			},
+			DiffSuppressFunc: AlwaysPresentNotUserProvided,
+		},
+	}
+
+	return &schema.Resource{
+		CreateContext: DefaultSystemCreate(resSchema),
+		ReadContext:   DefaultSystemRead(resSchema),
+		UpdateContext: DefaultSystemUpdate(resSchema),
+		DeleteContext: DefaultSystemDelete(resSchema),
+
+		Importer: &schema.ResourceImporter{
+			StateContext: schema.ImportStatePassthroughContext,
+		},
+
+		Schema: resSchema,
+	}
+}

routeros/resource_system_ip_neighbor_discovery_test.go

@@ -0,0 +1,51 @@
+package routeros
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-testing/helper/resource"
+)
+
+const testIpNeighborDiscoverySettings = "routeros_ip_neighbor_discovery_settings.test"
+
+func TestAccIpNeighborDiscoverySettingsTest_basic(t *testing.T) {
+	for _, name := range testNames {
+		t.Run(name, func(t *testing.T) {
+			resource.Test(t, resource.TestCase{
+				PreCheck: func() {
+					testAccPreCheck(t)
+					testSetTransportEnv(t, name)
+				},
+				ProviderFactories: testAccProviderFactories,
+				Steps: []resource.TestStep{
+					{
+						Config: testAccIpNeighborDiscoverySettingsConfig("static", "1", "rx-only", `[]`),
+						Check: resource.ComposeTestCheckFunc(
+							testResourcePrimaryInstanceId(testIpNeighborDiscoverySettings),
+							resource.TestCheckResourceAttr(testIpNeighborDiscoverySettings, "discover_interface_list", "static"),
+						),
+					},
+					{
+						Config: testAccIpNeighborDiscoverySettingsConfig("LAN", "disabled", "tx-and-rx", `["cdp", "lldp", "mndp"]`),
+						Check: resource.ComposeTestCheckFunc(
+							resource.TestCheckResourceAttr(testIpNeighborDiscoverySettings, "discover_interface_list", "LAN"),
+						),
+					},
+				},
+			})
+		})
+	}
+}
+
+func testAccIpNeighborDiscoverySettingsConfig(iflist, lldp, mode, proto string) string {
+	return fmt.Sprintf(`%v
+
+resource "routeros_ip_neighbor_discovery_settings" "test" {
+	discover_interface_list  = "%v"
+	lldp_med_net_policy_vlan = "%v"
+	mode                     = "%v"
+	protocol                 =  %v
+}
+`, providerConfig, iflist, lldp, mode, proto)
+}