feat(iaas): support for v2 API (#1070)

relates to STACKITTPR-313

stackit/internal/services/iaas/network/resource.go

@@ -3,9 +3,13 @@ package network
 import (
 	"context"
 	"fmt"
+	"net"
+	"net/http"
+	"strings"
 
 	"github.com/hashicorp/terraform-plugin-framework-validators/resourcevalidator"
 	"github.com/hashicorp/terraform-plugin-framework-validators/stringvalidator"
+	"github.com/hashicorp/terraform-plugin-framework/attr"
 	"github.com/hashicorp/terraform-plugin-framework/diag"
 	"github.com/hashicorp/terraform-plugin-framework/path"
 	"github.com/hashicorp/terraform-plugin-framework/resource"
@@ -18,16 +22,12 @@ import (
 	"github.com/hashicorp/terraform-plugin-framework/schema/validator"
 	"github.com/hashicorp/terraform-plugin-framework/types"
 	"github.com/hashicorp/terraform-plugin-log/tflog"
+	"github.com/stackitcloud/stackit-sdk-go/core/oapierror"
 	"github.com/stackitcloud/stackit-sdk-go/services/iaas"
-	"github.com/stackitcloud/stackit-sdk-go/services/iaasalpha"
+	"github.com/stackitcloud/stackit-sdk-go/services/iaas/wait"
 	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/conversion"
 	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/core"
-	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/features"
-	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/iaas/network/utils/model"
-	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/iaas/network/utils/v1network"
-	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/iaas/network/utils/v2network"
 	iaasUtils "github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/iaas/utils"
-	iaasAlphaUtils "github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/iaasalpha/utils"
 	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/utils"
 	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/validate"
 )
@@ -37,6 +37,7 @@ var (
 	_ resource.Resource                = &networkResource{}
 	_ resource.ResourceWithConfigure   = &networkResource{}
 	_ resource.ResourceWithImportState = &networkResource{}
+	_ resource.ResourceWithModifyPlan  = &networkResource{}
 )
 
 const (
@@ -46,6 +47,32 @@ const (
 		"In cases where `ipv4_nameservers` are defined within the resource, the existing behavior will remain unchanged."
 )
 
+type Model struct {
+	Id               types.String `tfsdk:"id"` // needed by TF
+	ProjectId        types.String `tfsdk:"project_id"`
+	NetworkId        types.String `tfsdk:"network_id"`
+	Name             types.String `tfsdk:"name"`
+	Nameservers      types.List   `tfsdk:"nameservers"`
+	IPv4Gateway      types.String `tfsdk:"ipv4_gateway"`
+	IPv4Nameservers  types.List   `tfsdk:"ipv4_nameservers"`
+	IPv4Prefix       types.String `tfsdk:"ipv4_prefix"`
+	IPv4PrefixLength types.Int64  `tfsdk:"ipv4_prefix_length"`
+	Prefixes         types.List   `tfsdk:"prefixes"`
+	IPv4Prefixes     types.List   `tfsdk:"ipv4_prefixes"`
+	IPv6Gateway      types.String `tfsdk:"ipv6_gateway"`
+	IPv6Nameservers  types.List   `tfsdk:"ipv6_nameservers"`
+	IPv6Prefix       types.String `tfsdk:"ipv6_prefix"`
+	IPv6PrefixLength types.Int64  `tfsdk:"ipv6_prefix_length"`
+	IPv6Prefixes     types.List   `tfsdk:"ipv6_prefixes"`
+	PublicIP         types.String `tfsdk:"public_ip"`
+	Labels           types.Map    `tfsdk:"labels"`
+	Routed           types.Bool   `tfsdk:"routed"`
+	NoIPv4Gateway    types.Bool   `tfsdk:"no_ipv4_gateway"`
+	NoIPv6Gateway    types.Bool   `tfsdk:"no_ipv6_gateway"`
+	Region           types.String `tfsdk:"region"`
+	RoutingTableID   types.String `tfsdk:"routing_table_id"`
+}
+
 // NewNetworkResource is a helper function to simplify the provider implementation.
 func NewNetworkResource() resource.Resource {
 	return &networkResource{}
@@ -53,11 +80,8 @@ func NewNetworkResource() resource.Resource {
 
 // networkResource is the resource implementation.
 type networkResource struct {
-	client *iaas.APIClient
-	// alphaClient will be used in case the experimental flag "network" is set
-	alphaClient    *iaasalpha.APIClient
-	isExperimental bool
-	providerData   core.ProviderData
+	client       *iaas.APIClient
+	providerData core.ProviderData
 }
 
 // Metadata returns the resource type name.
@@ -73,31 +97,18 @@ func (r *networkResource) Configure(ctx context.Context, req resource.ConfigureR
 		return
 	}
 
-	r.isExperimental = features.CheckExperimentEnabledWithoutError(ctx, &r.providerData, features.NetworkExperiment, "stackit_network", core.Resource, &resp.Diagnostics)
+	apiClient := iaasUtils.ConfigureClient(ctx, &r.providerData, &resp.Diagnostics)
 	if resp.Diagnostics.HasError() {
 		return
 	}
-
-	if r.isExperimental {
-		alphaApiClient := iaasAlphaUtils.ConfigureClient(ctx, &r.providerData, &resp.Diagnostics)
-		if resp.Diagnostics.HasError() {
-			return
-		}
-		r.alphaClient = alphaApiClient
-	} else {
-		apiClient := iaasUtils.ConfigureClient(ctx, &r.providerData, &resp.Diagnostics)
-		if resp.Diagnostics.HasError() {
-			return
-		}
-		r.client = apiClient
-	}
+	r.client = apiClient
 	tflog.Info(ctx, "IaaS client configured")
 }
 
 // ModifyPlan implements resource.ResourceWithModifyPlan.
 // Use the modifier to set the effective region in the current plan.
 func (r *networkResource) ModifyPlan(ctx context.Context, req resource.ModifyPlanRequest, resp *resource.ModifyPlanResponse) { // nolint:gocritic // function signature required by Terraform
-	var configModel model.Model
+	var configModel Model
 	// skip initial empty configuration to avoid follow-up errors
 	if req.Config.Raw.IsNull() {
 		return
@@ -107,7 +118,7 @@ func (r *networkResource) ModifyPlan(ctx context.Context, req resource.ModifyPla
 		return
 	}
 
-	var planModel model.Model
+	var planModel Model
 	resp.Diagnostics.Append(req.Plan.Get(ctx, &planModel)...)
 	if resp.Diagnostics.HasError() {
 		return
@@ -118,10 +129,6 @@ func (r *networkResource) ModifyPlan(ctx context.Context, req resource.ModifyPla
 		addIPv4Warning(&resp.Diagnostics)
 	}
 
-	// If the v1 api is used, it's not required to get the fallback region because it isn't used
-	if !r.isExperimental {
-		return
-	}
 	utils.AdaptRegion(ctx, configModel.Region, &planModel.Region, r.providerData.GetRegion(), resp)
 	if resp.Diagnostics.HasError() {
 		return
@@ -134,7 +141,7 @@ func (r *networkResource) ModifyPlan(ctx context.Context, req resource.ModifyPla
 }
 
 func (r *networkResource) ValidateConfig(ctx context.Context, req resource.ValidateConfigRequest, resp *resource.ValidateConfigResponse) {
-	var resourceModel model.Model
+	var resourceModel Model
 	resp.Diagnostics.Append(req.Config.Get(ctx, &resourceModel)...)
 	if resp.Diagnostics.HasError() {
 		return
@@ -143,14 +150,6 @@ func (r *networkResource) ValidateConfig(ctx context.Context, req resource.Valid
 	if !resourceModel.Nameservers.IsUnknown() && !resourceModel.IPv4Nameservers.IsUnknown() && !resourceModel.Nameservers.IsNull() && !resourceModel.IPv4Nameservers.IsNull() {
 		core.LogAndAddError(ctx, &resp.Diagnostics, "Error configuring network", "You cannot provide both the `nameservers` and `ipv4_nameservers` fields simultaneously. Please remove the deprecated `nameservers` field, and use `ipv4_nameservers` to configure nameservers for IPv4.")
 	}
-	if !r.isExperimental {
-		if !utils.IsUndefined(resourceModel.Region) {
-			core.LogAndAddError(ctx, &resp.Diagnostics, "Error configuring network", "Setting the `region` is not supported yet. This can only be configured when the experiments `network` is set.")
-		}
-		if !utils.IsUndefined(resourceModel.RoutingTableID) {
-			core.LogAndAddError(ctx, &resp.Diagnostics, "Error configuring network", "Setting the field `routing_table_id` is not supported yet. This can only be configured when the experiments `network` is set.")
-		}
-	}
 }
 
 // ConfigValidators validates the resource configuration
@@ -192,7 +191,7 @@ func (r *networkResource) Schema(_ context.Context, _ resource.SchemaRequest, re
 		Description:         description,
 		Attributes: map[string]schema.Attribute{
 			"id": schema.StringAttribute{
-				Description: "Terraform's internal resource ID. It is structured as \"`project_id`,`network_id`\".",
+				Description: "Terraform's internal resource ID. It is structured as \"`project_id`,`region`,`network_id`\".",
 				Computed:    true,
 				PlanModifiers: []planmodifier.String{
 					stringplanmodifier.UseStateForUnknown(),
@@ -359,7 +358,7 @@ func (r *networkResource) Schema(_ context.Context, _ resource.SchemaRequest, re
 				},
 			},
 			"routing_table_id": schema.StringAttribute{
-				Description: "Can only be used when experimental \"network\" is set.\nThe ID of the routing table associated with the network.",
+				Description: "The ID of the routing table associated with the network.",
 				Optional:    true,
 				Computed:    true,
 				PlanModifiers: []planmodifier.String{
@@ -374,7 +373,7 @@ func (r *networkResource) Schema(_ context.Context, _ resource.SchemaRequest, re
 				Optional: true,
 				// must be computed to allow for storing the override value from the provider
 				Computed:    true,
-				Description: "Can only be used when experimental \"network\" is set.\nThe resource region. If not defined, the provider region is used.",
+				Description: "The resource region. If not defined, the provider region is used.",
 				PlanModifiers: []planmodifier.String{
 					stringplanmodifier.RequiresReplaceIfConfigured(),
 				},
@@ -386,59 +385,568 @@ func (r *networkResource) Schema(_ context.Context, _ resource.SchemaRequest, re
 // Create creates the resource and sets the initial Terraform state.
 func (r *networkResource) Create(ctx context.Context, req resource.CreateRequest, resp *resource.CreateResponse) { // nolint:gocritic // function signature required by Terraform
 	// Retrieve values from plan
-	var planModel model.Model
-	diags := req.Plan.Get(ctx, &planModel)
+	var model Model
+	diags := req.Plan.Get(ctx, &model)
 	resp.Diagnostics.Append(diags...)
 	if resp.Diagnostics.HasError() {
 		return
 	}
+
 	// When IPv4Nameserver is not set, print warning that the behavior of ipv4_nameservers will change
-	if utils.IsUndefined(planModel.IPv4Nameservers) {
+	if utils.IsUndefined(model.IPv4Nameservers) {
 		addIPv4Warning(&resp.Diagnostics)
 	}
 
-	if !r.isExperimental {
-		v1network.Create(ctx, req, resp, r.client)
-	} else {
-		v2network.Create(ctx, req, resp, r.alphaClient)
+	projectId := model.ProjectId.ValueString()
+	region := r.providerData.GetRegionWithOverride(model.Region)
+	ctx = tflog.SetField(ctx, "project_id", projectId)
+	ctx = tflog.SetField(ctx, "region", region)
+
+	// Generate API request body from model
+	payload, err := toCreatePayload(ctx, &model)
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error creating network", fmt.Sprintf("Creating API payload: %v", err))
+		return
 	}
+
+	// Create new network
+
+	network, err := r.client.CreateNetwork(ctx, projectId, region).CreateNetworkPayload(*payload).Execute()
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error creating network", fmt.Sprintf("Calling API: %v", err))
+		return
+	}
+
+	networkId := *network.Id
+	ctx = tflog.SetField(ctx, "network_id", networkId)
+
+	network, err = wait.CreateNetworkWaitHandler(ctx, r.client, projectId, region, networkId).WaitWithContext(ctx)
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error creating network", fmt.Sprintf("Network creation waiting: %v", err))
+		return
+	}
+
+	// Map response body to schema
+	err = mapFields(ctx, network, &model, region)
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error creating network", fmt.Sprintf("Processing API payload: %v", err))
+		return
+	}
+	// Set state to fully populated data
+	diags = resp.State.Set(ctx, model)
+	resp.Diagnostics.Append(diags...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+	tflog.Info(ctx, "Network created")
 }
 
 // Read refreshes the Terraform state with the latest data.
 func (r *networkResource) Read(ctx context.Context, req resource.ReadRequest, resp *resource.ReadResponse) { // nolint:gocritic // function signature required by Terraform
-	if !r.isExperimental {
-		v1network.Read(ctx, req, resp, r.client)
-	} else {
-		v2network.Read(ctx, req, resp, r.alphaClient, r.providerData)
+	var model Model
+	diags := req.State.Get(ctx, &model)
+	resp.Diagnostics.Append(diags...)
+	if resp.Diagnostics.HasError() {
+		return
 	}
+	projectId := model.ProjectId.ValueString()
+	networkId := model.NetworkId.ValueString()
+	region := r.providerData.GetRegionWithOverride(model.Region)
+	ctx = tflog.SetField(ctx, "project_id", projectId)
+	ctx = tflog.SetField(ctx, "network_id", networkId)
+	ctx = tflog.SetField(ctx, "region", region)
+
+	networkResp, err := r.client.GetNetwork(ctx, projectId, region, networkId).Execute()
+	if err != nil {
+		oapiErr, ok := err.(*oapierror.GenericOpenAPIError) //nolint:errorlint //complaining that error.As should be used to catch wrapped errors, but this error should not be wrapped
+		if ok && oapiErr.StatusCode == http.StatusNotFound {
+			resp.State.RemoveResource(ctx)
+			return
+		}
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error reading network", fmt.Sprintf("Calling API: %v", err))
+		return
+	}
+
+	// Map response body to schema
+	err = mapFields(ctx, networkResp, &model, region)
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error reading network", fmt.Sprintf("Processing API payload: %v", err))
+		return
+	}
+	// Set refreshed state
+	diags = resp.State.Set(ctx, model)
+	resp.Diagnostics.Append(diags...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+	tflog.Info(ctx, "Network read")
 }
 
 // Update updates the resource and sets the updated Terraform state on success.
 func (r *networkResource) Update(ctx context.Context, req resource.UpdateRequest, resp *resource.UpdateResponse) { // nolint:gocritic // function signature required by Terraform
-	if !r.isExperimental {
-		v1network.Update(ctx, req, resp, r.client)
-	} else {
-		v2network.Update(ctx, req, resp, r.alphaClient)
+	// Retrieve values from plan
+	var model Model
+	diags := req.Plan.Get(ctx, &model)
+	resp.Diagnostics.Append(diags...)
+	if resp.Diagnostics.HasError() {
+		return
 	}
+	projectId := model.ProjectId.ValueString()
+	networkId := model.NetworkId.ValueString()
+	region := r.providerData.GetRegionWithOverride(model.Region)
+	ctx = tflog.SetField(ctx, "project_id", projectId)
+	ctx = tflog.SetField(ctx, "network_id", networkId)
+	ctx = tflog.SetField(ctx, "region", region)
+
+	// Retrieve values from state
+	var stateModel Model
+	diags = req.State.Get(ctx, &stateModel)
+	resp.Diagnostics.Append(diags...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	// Generate API request body from model
+	payload, err := toUpdatePayload(ctx, &model, &stateModel)
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error updating network", fmt.Sprintf("Creating API payload: %v", err))
+		return
+	}
+	// Update existing network
+	err = r.client.PartialUpdateNetwork(ctx, projectId, region, networkId).PartialUpdateNetworkPayload(*payload).Execute()
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error updating network", fmt.Sprintf("Calling API: %v", err))
+		return
+	}
+	waitResp, err := wait.UpdateNetworkWaitHandler(ctx, r.client, projectId, region, networkId).WaitWithContext(ctx)
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error updating network", fmt.Sprintf("Network update waiting: %v", err))
+		return
+	}
+
+	err = mapFields(ctx, waitResp, &model, region)
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error updating network", fmt.Sprintf("Processing API payload: %v", err))
+		return
+	}
+	diags = resp.State.Set(ctx, model)
+	resp.Diagnostics.Append(diags...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+	tflog.Info(ctx, "Network updated")
 }
 
 // Delete deletes the resource and removes the Terraform state on success.
 func (r *networkResource) Delete(ctx context.Context, req resource.DeleteRequest, resp *resource.DeleteResponse) { // nolint:gocritic // function signature required by Terraform
-	if !r.isExperimental {
-		v1network.Delete(ctx, req, resp, r.client)
-	} else {
-		v2network.Delete(ctx, req, resp, r.alphaClient)
+	// Retrieve values from state
+	var model Model
+	diags := req.State.Get(ctx, &model)
+	resp.Diagnostics.Append(diags...)
+	if resp.Diagnostics.HasError() {
+		return
 	}
+
+	projectId := model.ProjectId.ValueString()
+	networkId := model.NetworkId.ValueString()
+	region := model.Region.ValueString()
+	ctx = tflog.SetField(ctx, "project_id", projectId)
+	ctx = tflog.SetField(ctx, "network_id", networkId)
+	ctx = tflog.SetField(ctx, "region", region)
+
+	// Delete existing network
+	err := r.client.DeleteNetwork(ctx, projectId, region, networkId).Execute()
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error deleting network", fmt.Sprintf("Calling API: %v", err))
+		return
+	}
+	_, err = wait.DeleteNetworkWaitHandler(ctx, r.client, projectId, region, networkId).WaitWithContext(ctx)
+	if err != nil {
+		core.LogAndAddError(ctx, &resp.Diagnostics, "Error deleting network", fmt.Sprintf("Network deletion waiting: %v", err))
+		return
+	}
+
+	tflog.Info(ctx, "Network deleted")
 }
 
 // ImportState imports a resource into the Terraform state on success.
-// The expected format of the resource import identifier is: project_id,network_id
+// The expected format of the resource import identifier is: project_id,region,network_id
 func (r *networkResource) ImportState(ctx context.Context, req resource.ImportStateRequest, resp *resource.ImportStateResponse) {
-	if !r.isExperimental {
-		v1network.ImportState(ctx, req, resp)
-	} else {
-		v2network.ImportState(ctx, req, resp)
+	idParts := strings.Split(req.ID, core.Separator)
+
+	if len(idParts) != 3 || idParts[0] == "" || idParts[1] == "" || idParts[2] == "" {
+		core.LogAndAddError(ctx, &resp.Diagnostics,
+			"Error importing network",
+			fmt.Sprintf("Expected import identifier with format: [project_id],[region],[network_id]  Got: %q", req.ID),
+		)
+		return
 	}
+
+	projectId := idParts[0]
+	region := idParts[1]
+	networkId := idParts[2]
+	ctx = tflog.SetField(ctx, "project_id", projectId)
+	ctx = tflog.SetField(ctx, "region", region)
+	ctx = tflog.SetField(ctx, "network_id", networkId)
+
+	resp.Diagnostics.Append(resp.State.SetAttribute(ctx, path.Root("project_id"), projectId)...)
+	resp.Diagnostics.Append(resp.State.SetAttribute(ctx, path.Root("region"), region)...)
+	resp.Diagnostics.Append(resp.State.SetAttribute(ctx, path.Root("network_id"), networkId)...)
+	tflog.Info(ctx, "Network state imported")
+}
+
+func mapFields(ctx context.Context, networkResp *iaas.Network, model *Model, region string) error {
+	if networkResp == nil {
+		return fmt.Errorf("response input is nil")
+	}
+	if model == nil {
+		return fmt.Errorf("model input is nil")
+	}
+
+	var networkId string
+	if model.NetworkId.ValueString() != "" {
+		networkId = model.NetworkId.ValueString()
+	} else if networkResp.Id != nil {
+		networkId = *networkResp.Id
+	} else {
+		return fmt.Errorf("network id not present")
+	}
+
+	model.Id = utils.BuildInternalTerraformId(model.ProjectId.ValueString(), region, networkId)
+
+	labels, err := iaasUtils.MapLabels(ctx, networkResp.Labels, model.Labels)
+	if err != nil {
+		return err
+	}
+
+	// IPv4
+
+	if networkResp.Ipv4 == nil || networkResp.Ipv4.Nameservers == nil {
+		model.Nameservers = types.ListNull(types.StringType)
+		model.IPv4Nameservers = types.ListNull(types.StringType)
+	} else {
+		respNameservers := *networkResp.Ipv4.Nameservers
+		modelNameservers, err := utils.ListValuetoStringSlice(model.Nameservers)
+		modelIPv4Nameservers, errIpv4 := utils.ListValuetoStringSlice(model.IPv4Nameservers)
+		if err != nil {
+			return fmt.Errorf("get current network nameservers from model: %w", err)
+		}
+		if errIpv4 != nil {
+			return fmt.Errorf("get current IPv4 network nameservers from model: %w", errIpv4)
+		}
+
+		reconciledNameservers := utils.ReconcileStringSlices(modelNameservers, respNameservers)
+		reconciledIPv4Nameservers := utils.ReconcileStringSlices(modelIPv4Nameservers, respNameservers)
+
+		nameserversTF, diags := types.ListValueFrom(ctx, types.StringType, reconciledNameservers)
+		ipv4NameserversTF, ipv4Diags := types.ListValueFrom(ctx, types.StringType, reconciledIPv4Nameservers)
+		if diags.HasError() {
+			return fmt.Errorf("map network nameservers: %w", core.DiagsToError(diags))
+		}
+		if ipv4Diags.HasError() {
+			return fmt.Errorf("map IPv4 network nameservers: %w", core.DiagsToError(ipv4Diags))
+		}
+
+		model.Nameservers = nameserversTF
+		model.IPv4Nameservers = ipv4NameserversTF
+	}
+
+	model.IPv4PrefixLength = types.Int64Null()
+	if networkResp.Ipv4 == nil || networkResp.Ipv4.Prefixes == nil {
+		model.Prefixes = types.ListNull(types.StringType)
+		model.IPv4Prefixes = types.ListNull(types.StringType)
+	} else {
+		respPrefixes := *networkResp.Ipv4.Prefixes
+		prefixesTF, diags := types.ListValueFrom(ctx, types.StringType, respPrefixes)
+		if diags.HasError() {
+			return fmt.Errorf("map network prefixes: %w", core.DiagsToError(diags))
+		}
+		if len(respPrefixes) > 0 {
+			model.IPv4Prefix = types.StringValue(respPrefixes[0])
+			_, netmask, err := net.ParseCIDR(respPrefixes[0])
+			if err != nil {
+				tflog.Error(ctx, fmt.Sprintf("ipv4_prefix_length: %+v", err))
+				// silently ignore parsing error for the netmask
+				model.IPv4PrefixLength = types.Int64Null()
+			} else {
+				ones, _ := netmask.Mask.Size()
+				model.IPv4PrefixLength = types.Int64Value(int64(ones))
+			}
+		}
+
+		model.Prefixes = prefixesTF
+		model.IPv4Prefixes = prefixesTF
+	}
+
+	if networkResp.Ipv4 == nil || networkResp.Ipv4.Gateway == nil {
+		model.IPv4Gateway = types.StringNull()
+	} else {
+		model.IPv4Gateway = types.StringPointerValue(networkResp.Ipv4.GetGateway())
+	}
+
+	if networkResp.Ipv4 == nil || networkResp.Ipv4.PublicIp == nil {
+		model.PublicIP = types.StringNull()
+	} else {
+		model.PublicIP = types.StringPointerValue(networkResp.Ipv4.PublicIp)
+	}
+
+	// IPv6
+
+	if networkResp.Ipv6 == nil || networkResp.Ipv6.Nameservers == nil {
+		model.IPv6Nameservers = types.ListNull(types.StringType)
+	} else {
+		respIPv6Nameservers := *networkResp.Ipv6.Nameservers
+		modelIPv6Nameservers, errIpv6 := utils.ListValuetoStringSlice(model.IPv6Nameservers)
+		if errIpv6 != nil {
+			return fmt.Errorf("get current IPv6 network nameservers from model: %w", errIpv6)
+		}
+
+		reconciledIPv6Nameservers := utils.ReconcileStringSlices(modelIPv6Nameservers, respIPv6Nameservers)
+
+		ipv6NameserversTF, ipv6Diags := types.ListValueFrom(ctx, types.StringType, reconciledIPv6Nameservers)
+		if ipv6Diags.HasError() {
+			return fmt.Errorf("map IPv6 network nameservers: %w", core.DiagsToError(ipv6Diags))
+		}
+
+		model.IPv6Nameservers = ipv6NameserversTF
+	}
+
+	model.IPv6PrefixLength = types.Int64Null()
+	model.IPv6Prefix = types.StringNull()
+	if networkResp.Ipv6 == nil || networkResp.Ipv6.Prefixes == nil {
+		model.IPv6Prefixes = types.ListNull(types.StringType)
+	} else {
+		respPrefixesV6 := *networkResp.Ipv6.Prefixes
+		prefixesV6TF, diags := types.ListValueFrom(ctx, types.StringType, respPrefixesV6)
+		if diags.HasError() {
+			return fmt.Errorf("map network IPv6 prefixes: %w", core.DiagsToError(diags))
+		}
+		if len(respPrefixesV6) > 0 {
+			model.IPv6Prefix = types.StringValue(respPrefixesV6[0])
+			_, netmask, err := net.ParseCIDR(respPrefixesV6[0])
+			if err != nil {
+				// silently ignore parsing error for the netmask
+				model.IPv6PrefixLength = types.Int64Null()
+			} else {
+				ones, _ := netmask.Mask.Size()
+				model.IPv6PrefixLength = types.Int64Value(int64(ones))
+			}
+		}
+		model.IPv6Prefixes = prefixesV6TF
+	}
+
+	if networkResp.Ipv6 == nil || networkResp.Ipv6.Gateway == nil {
+		model.IPv6Gateway = types.StringNull()
+	} else {
+		model.IPv6Gateway = types.StringPointerValue(networkResp.Ipv6.GetGateway())
+	}
+
+	model.RoutingTableID = types.StringPointerValue(networkResp.RoutingTableId)
+	model.NetworkId = types.StringValue(networkId)
+	model.Name = types.StringPointerValue(networkResp.Name)
+	model.Labels = labels
+	model.Routed = types.BoolPointerValue(networkResp.Routed)
+	model.Region = types.StringValue(region)
+
+	return nil
+}
+
+func toCreatePayload(ctx context.Context, model *Model) (*iaas.CreateNetworkPayload, error) {
+	if model == nil {
+		return nil, fmt.Errorf("nil model")
+	}
+
+	var modelIPv6Nameservers []string
+	// Is true when IPv6Nameservers is not null or unset
+	if !utils.IsUndefined(model.IPv6Nameservers) {
+		// If ipv6Nameservers is empty, modelIPv6Nameservers will be set to an empty slice.
+		// empty slice != nil slice. Empty slice will result in an empty list in the payload []. Nil slice will result in a payload without the property set
+		modelIPv6Nameservers = []string{}
+		for _, ipv6ns := range model.IPv6Nameservers.Elements() {
+			ipv6NameserverString, ok := ipv6ns.(types.String)
+			if !ok {
+				return nil, fmt.Errorf("type assertion failed")
+			}
+			modelIPv6Nameservers = append(modelIPv6Nameservers, ipv6NameserverString.ValueString())
+		}
+	}
+
+	var ipv6Body *iaas.CreateNetworkIPv6
+	if !utils.IsUndefined(model.IPv6PrefixLength) {
+		ipv6Body = &iaas.CreateNetworkIPv6{
+			CreateNetworkIPv6WithPrefixLength: &iaas.CreateNetworkIPv6WithPrefixLength{
+				PrefixLength: conversion.Int64ValueToPointer(model.IPv6PrefixLength),
+			},
+		}
+
+		// IPv6 nameservers should only be set, if it contains any value. If the slice is nil, it should NOT be set.
+		// Setting it to a nil slice would result in a payload, where nameservers is set to null in the json payload,
+		// but it should actually be unset. Setting it to "null" will result in an error, because it's NOT nullable.
+		if modelIPv6Nameservers != nil {
+			ipv6Body.CreateNetworkIPv6WithPrefixLength.Nameservers = &modelIPv6Nameservers
+		}
+	} else if !utils.IsUndefined(model.IPv6Prefix) {
+		var gateway *iaas.NullableString
+		if model.NoIPv6Gateway.ValueBool() {
+			gateway = iaas.NewNullableString(nil)
+		} else if !(model.IPv6Gateway.IsUnknown() || model.IPv6Gateway.IsNull()) {
+			gateway = iaas.NewNullableString(conversion.StringValueToPointer(model.IPv6Gateway))
+		}
+
+		ipv6Body = &iaas.CreateNetworkIPv6{
+			CreateNetworkIPv6WithPrefix: &iaas.CreateNetworkIPv6WithPrefix{
+				Gateway: gateway,
+				Prefix:  conversion.StringValueToPointer(model.IPv6Prefix),
+			},
+		}
+
+		// IPv6 nameservers should only be set, if it contains any value. If the slice is nil, it should NOT be set.
+		// Setting it to a nil slice would result in a payload, where nameservers is set to null in the json payload,
+		// but it should actually be unset. Setting it to "null" will result in an error, because it's NOT nullable.
+		if modelIPv6Nameservers != nil {
+			ipv6Body.CreateNetworkIPv6WithPrefix.Nameservers = &modelIPv6Nameservers
+		}
+	}
+
+	modelIPv4Nameservers := []string{}
+	var modelIPv4List []attr.Value
+
+	if !(model.IPv4Nameservers.IsNull() || model.IPv4Nameservers.IsUnknown()) {
+		modelIPv4List = model.IPv4Nameservers.Elements()
+	} else {
+		modelIPv4List = model.Nameservers.Elements()
+	}
+
+	for _, ipv4ns := range modelIPv4List {
+		ipv4NameserverString, ok := ipv4ns.(types.String)
+		if !ok {
+			return nil, fmt.Errorf("type assertion failed")
+		}
+		modelIPv4Nameservers = append(modelIPv4Nameservers, ipv4NameserverString.ValueString())
+	}
+
+	var ipv4Body *iaas.CreateNetworkIPv4
+	if !utils.IsUndefined(model.IPv4PrefixLength) {
+		ipv4Body = &iaas.CreateNetworkIPv4{
+			CreateNetworkIPv4WithPrefixLength: &iaas.CreateNetworkIPv4WithPrefixLength{
+				Nameservers:  &modelIPv4Nameservers,
+				PrefixLength: conversion.Int64ValueToPointer(model.IPv4PrefixLength),
+			},
+		}
+	} else if !utils.IsUndefined(model.IPv4Prefix) {
+		var gateway *iaas.NullableString
+		if model.NoIPv4Gateway.ValueBool() {
+			gateway = iaas.NewNullableString(nil)
+		} else if !(model.IPv4Gateway.IsUnknown() || model.IPv4Gateway.IsNull()) {
+			gateway = iaas.NewNullableString(conversion.StringValueToPointer(model.IPv4Gateway))
+		}
+
+		ipv4Body = &iaas.CreateNetworkIPv4{
+			CreateNetworkIPv4WithPrefix: &iaas.CreateNetworkIPv4WithPrefix{
+				Nameservers: &modelIPv4Nameservers,
+				Prefix:      conversion.StringValueToPointer(model.IPv4Prefix),
+				Gateway:     gateway,
+			},
+		}
+	}
+
+	labels, err := conversion.ToStringInterfaceMap(ctx, model.Labels)
+	if err != nil {
+		return nil, fmt.Errorf("converting to Go map: %w", err)
+	}
+
+	payload := iaas.CreateNetworkPayload{
+		Name:           conversion.StringValueToPointer(model.Name),
+		Labels:         &labels,
+		Routed:         conversion.BoolValueToPointer(model.Routed),
+		Ipv4:           ipv4Body,
+		Ipv6:           ipv6Body,
+		RoutingTableId: conversion.StringValueToPointer(model.RoutingTableID),
+	}
+
+	return &payload, nil
+}
+
+func toUpdatePayload(ctx context.Context, model, stateModel *Model) (*iaas.PartialUpdateNetworkPayload, error) {
+	if model == nil {
+		return nil, fmt.Errorf("nil model")
+	}
+
+	var modelIPv6Nameservers []string
+	// Is true when IPv6Nameservers is not null or unset
+	if !utils.IsUndefined(model.IPv6Nameservers) {
+		// If ipv6Nameservers is empty, modelIPv6Nameservers will be set to an empty slice.
+		// empty slice != nil slice. Empty slice will result in an empty list in the payload []. Nil slice will result in a payload without the property set
+		modelIPv6Nameservers = []string{}
+		for _, ipv6ns := range model.IPv6Nameservers.Elements() {
+			ipv6NameserverString, ok := ipv6ns.(types.String)
+			if !ok {
+				return nil, fmt.Errorf("type assertion failed")
+			}
+			modelIPv6Nameservers = append(modelIPv6Nameservers, ipv6NameserverString.ValueString())
+		}
+	}
+
+	var ipv6Body *iaas.UpdateNetworkIPv6Body
+	if modelIPv6Nameservers != nil || !utils.IsUndefined(model.NoIPv6Gateway) || !utils.IsUndefined(model.IPv6Gateway) {
+		ipv6Body = &iaas.UpdateNetworkIPv6Body{}
+		// IPv6 nameservers should only be set, if it contains any value. If the slice is nil, it should NOT be set.
+		// Setting it to a nil slice would result in a payload, where nameservers is set to null in the json payload,
+		// but it should actually be unset. Setting it to "null" will result in an error, because it's NOT nullable.
+		if modelIPv6Nameservers != nil {
+			ipv6Body.Nameservers = &modelIPv6Nameservers
+		}
+
+		if model.NoIPv6Gateway.ValueBool() {
+			ipv6Body.Gateway = iaas.NewNullableString(nil)
+		} else if !(model.IPv6Gateway.IsUnknown() || model.IPv6Gateway.IsNull()) {
+			ipv6Body.Gateway = iaas.NewNullableString(conversion.StringValueToPointer(model.IPv6Gateway))
+		}
+	}
+
+	modelIPv4Nameservers := []string{}
+	var modelIPv4List []attr.Value
+
+	if !(model.IPv4Nameservers.IsNull() || model.IPv4Nameservers.IsUnknown()) {
+		modelIPv4List = model.IPv4Nameservers.Elements()
+	} else {
+		modelIPv4List = model.Nameservers.Elements()
+	}
+	for _, ipv4ns := range modelIPv4List {
+		ipv4NameserverString, ok := ipv4ns.(types.String)
+		if !ok {
+			return nil, fmt.Errorf("type assertion failed")
+		}
+		modelIPv4Nameservers = append(modelIPv4Nameservers, ipv4NameserverString.ValueString())
+	}
+
+	var ipv4Body *iaas.UpdateNetworkIPv4Body
+	if !model.IPv4Nameservers.IsNull() || !model.Nameservers.IsNull() {
+		ipv4Body = &iaas.UpdateNetworkIPv4Body{
+			Nameservers: &modelIPv4Nameservers,
+		}
+
+		if model.NoIPv4Gateway.ValueBool() {
+			ipv4Body.Gateway = iaas.NewNullableString(nil)
+		} else if !(model.IPv4Gateway.IsUnknown() || model.IPv4Gateway.IsNull()) {
+			ipv4Body.Gateway = iaas.NewNullableString(conversion.StringValueToPointer(model.IPv4Gateway))
+		}
+	}
+	currentLabels := stateModel.Labels
+	labels, err := conversion.ToJSONMapPartialUpdatePayload(ctx, currentLabels, model.Labels)
+	if err != nil {
+		return nil, fmt.Errorf("converting to Go map: %w", err)
+	}
+
+	payload := iaas.PartialUpdateNetworkPayload{
+		Name:           conversion.StringValueToPointer(model.Name),
+		Labels:         &labels,
+		Ipv4:           ipv4Body,
+		Ipv6:           ipv6Body,
+		RoutingTableId: conversion.StringValueToPointer(model.RoutingTableID),
+	}
+
+	return &payload, nil
 }
 
 func addIPv4Warning(diags *diag.Diagnostics) {