WIP: DNS

hub/api/db/sanitize-validate.go

@@ -11,6 +11,7 @@ var (
 	ErrNonPrivateIP    = errors.New("non-private IP")
 	ErrInvalidPort     = errors.New("invalid port")
 	ErrInvalidNetName  = errors.New("invalid network name")
+	ErrNetNameNotLocal = errors.New("network name must end with .local")
 	ErrInvalidPeerName = errors.New("invalid peer name")
 )
 
@@ -22,7 +23,7 @@ func Config_Validate(c *Config) error {
 }
 
 func Network_Sanitize(n *Network) {
-	n.Name = strings.TrimSpace(n.Name)
+	n.LocalDomain = strings.TrimSpace(n.LocalDomain)
 
 	if addr, ok := netip.AddrFromSlice(n.Network); ok {
 		n.Network = addr.AsSlice()
@@ -30,12 +31,17 @@ func Network_Sanitize(n *Network) {
 }
 
 func Network_Validate(c *Network) error {
-	// 16 bytes is linux limit for network interface names.
-	if len(c.Name) == 0 || len(c.Name) > 16 {
+	// 15 bytes is linux limit for network interface names. With ending .local,
+	// max length is 21.
+	if len(c.LocalDomain) == 0 || len(c.LocalDomain) > 21 {
 		return ErrInvalidNetName
 	}
 
-	for _, c := range c.Name {
+	if !strings.HasSuffix(c.LocalDomain, ".local") {
+		return ErrNetNameNotLocal
+	}
+
+	for _, c := range strings.TrimSuffix(c.LocalDomain, ".local") {
 		if c >= 'a' && c <= 'z' {
 			continue
 		}