azurerm_postgresql_firewall_rule - add validation for `start_ip_add…

…ress` and `end_ip_address` (#8963)

Added postgres firewall start and end IP address validation.

azurerm/internal/services/postgres/postgresql_firewall_rule_resource.go

@@ -8,6 +8,7 @@ import (
 	"github.com/Azure/azure-sdk-for-go/services/postgresql/mgmt/2020-01-01/postgresql"
 	"github.com/hashicorp/go-azure-helpers/response"
 	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/helper/validation"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/azure"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/tf"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/clients"
@@ -49,15 +50,17 @@ func resourceArmPostgreSQLFirewallRule() *schema.Resource {
 			},
 
 			"start_ip_address": {
-				Type:     schema.TypeString,
-				Required: true,
-				ForceNew: true,
+				Type:         schema.TypeString,
+				Required:     true,
+				ForceNew:     true,
+				ValidateFunc: validation.IsIPv4Address,
 			},
 
 			"end_ip_address": {
-				Type:     schema.TypeString,
-				Required: true,
-				ForceNew: true,
+				Type:         schema.TypeString,
+				Required:     true,
+				ForceNew:     true,
+				ValidateFunc: validation.IsIPv4Address,
 			},
 		},
 	}