suppress matching ipv6 dns record

.changelog/3888.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+resource/cloudflare_record: Suppress matching ipv6 dns record
+```

internal/sdkv2provider/resource_cloudflare_record.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"net"
 	"strings"
 	"time"
 
@@ -501,3 +502,22 @@ func suppressTrailingDots(k, old, new string, d *schema.ResourceData) bool {
 
 	return strings.TrimSuffix(old, ".") == newTrimmed
 }
+
+func suppressMatchingIpv6(old, new string) bool {
+	oldIpv6 := net.ParseIP(old)
+	if oldIpv6 == nil || oldIpv6.To16() == nil {
+		return false
+	}
+	newIpv6 := net.ParseIP(new)
+	if newIpv6 == nil || newIpv6.To16() == nil {
+		return false
+	}
+	return oldIpv6.Equal(newIpv6)
+}
+
+func suppressContent(k, old, new string, d *schema.ResourceData) bool {
+	if suppressMatchingIpv6(old, new) {
+		return true
+	}
+	return suppressTrailingDots(k, old, new, d)
+}

internal/sdkv2provider/resource_cloudflare_record_test.go

@@ -13,6 +13,7 @@ import (
 	"github.com/cloudflare/terraform-provider-cloudflare/internal/consts"
 	"github.com/hashicorp/terraform-plugin-log/tflog"
 	"github.com/hashicorp/terraform-plugin-testing/helper/resource"
+	"github.com/hashicorp/terraform-plugin-testing/plancheck"
 	"github.com/hashicorp/terraform-plugin-testing/terraform"
 	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
@@ -672,6 +673,35 @@ func TestAccCloudflareRecord_ClearTags(t *testing.T) {
 	})
 }
 
+func TestAccCloudflareRecord_CompareIPv6(t *testing.T) {
+	t.Parallel()
+	zoneID := os.Getenv("CLOUDFLARE_ZONE_ID")
+	rnd := generateRandomResourceName()
+	name := fmt.Sprintf("cloudflare_record.%s", rnd)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:          func() { testAccPreCheck(t) },
+		ProviderFactories: providerFactories,
+		CheckDestroy:      testAccCheckCloudflareRecordDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccCheckCloudflareRecordConfigIPv6(zoneID, rnd, rnd, "2001:4860:4860:0:0:0:0:8888"),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(name, "name", rnd),
+					resource.TestCheckResourceAttr(name, "type", "AAAA"),
+					resource.TestCheckResourceAttr(name, "content", "2001:4860:4860::8888"),
+				),
+			},
+			{
+				Config: testAccCheckCloudflareRecordConfigIPv6(zoneID, rnd, rnd, "2001:4860:4860::8888"),
+				ConfigPlanChecks: resource.ConfigPlanChecks{
+					PreApply: []plancheck.PlanCheck{plancheck.ExpectEmptyPlan()},
+				},
+			},
+		},
+	})
+}
+
 func TestSuppressTrailingDots(t *testing.T) {
 	t.Parallel()
 
@@ -697,6 +727,28 @@ func TestSuppressTrailingDots(t *testing.T) {
 	}
 }
 
+func TestIPv6Comparison(t *testing.T) {
+	t.Parallel()
+
+	cases := []struct {
+		old string
+		new string
+	}{
+		{"2001:db8:3333:4444:5555:6666:7777:8888", "2001:db8:3333:4444:5555:6666:7777:8888"},
+		{"1050:0000:0000:0000:0005:0600:300c:326b", "1050:0:0:0:5:0600:300c:326b"},
+		{"ff06:0:0:0:0:0:0:c3", "ff06::c3"},
+		{"0:0:0:0:0:0:0:0", "::"},
+		{"2001:db8::", "2001:db8:0:0:0:0:0:0"},
+		{"::1234:5678", "0:0:0:0:0:0:1234:5678"},
+		{"2001:db8:0:0:0:0:1234:5678", "2001:db8::1234:5678"},
+	}
+
+	for _, c := range cases {
+		got := suppressContent("", c.old, c.new, nil)
+		assert.Equal(t, true, got)
+	}
+}
+
 func testAccCheckCloudflareRecordRecreated(before, after *cloudflare.DNSRecord) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 		if before.ID == after.ID {
@@ -1076,3 +1128,14 @@ func testAccCheckCloudflareRecordDNSKEY(zoneID, name string) string {
 	 }
 `, zoneID, name)
 }
+
+func testAccCheckCloudflareRecordConfigIPv6(zoneID, name, rnd, content string) string {
+	return fmt.Sprintf(`
+resource "cloudflare_record" "%[3]s" {
+	zone_id = "%[1]s"
+	name = "%[2]s"
+	content = "%[4]s"
+	type = "AAAA"
+	ttl = 3600
+}`, zoneID, name, rnd, content)
+}

internal/sdkv2provider/schema_cloudflare_record.go

@@ -58,7 +58,7 @@ func resourceCloudflareRecordSchema() map[string]*schema.Schema {
 			Optional:         true,
 			Computed:         true,
 			ExactlyOneOf:     []string{"data", "content", "value"},
-			DiffSuppressFunc: suppressTrailingDots,
+			DiffSuppressFunc: suppressContent,
 			Description:      "The content of the record.",
 		},