Add RFC 6598 private IP range

Fixes #1031 by adding 100.64.0.0/10 as a private IP range.

consul/util.go

@@ -19,6 +19,7 @@ import (
 /*
  * Contains an entry for each private block:
  * 10.0.0.0/8
+ * 100.64.0.0/10
  * 172.16.0.0/12
  * 192.168/16
  */
@@ -41,7 +42,8 @@ func (s *serverParts) String() string {
 
 func init() {
 	// Add each private block
-	privateBlocks = make([]*net.IPNet, 3)
+	privateBlocks = make([]*net.IPNet, 4)
+
 	_, block, err := net.ParseCIDR("10.0.0.0/8")
 	if err != nil {
 		panic(fmt.Sprintf("Bad cidr. Got %v", err))
@@ -59,6 +61,12 @@ func init() {
 		panic(fmt.Sprintf("Bad cidr. Got %v", err))
 	}
 	privateBlocks[2] = block
+
+	_, block, err = net.ParseCIDR("100.64.0.0/10")
+	if err != nil {
+		panic(fmt.Sprintf("Bad cidr. Got %v", err))
+	}
+	privateBlocks[3] = block
 }
 
 // strContains checks if a list contains a string

consul/util_test.go

@@ -38,6 +38,9 @@ func TestIsPrivateIP(t *testing.T) {
 	if !isPrivateIP("10.1.2.3") {
 		t.Fatalf("bad")
 	}
+	if !isPrivateIP("100.115.110.19") {
+		t.Fatalf("bad")
+	}
 	if isPrivateIP("8.8.8.8") {
 		t.Fatalf("bad")
 	}