WIP: DNS

hub/api/db/generated.go

@@ -191,12 +191,12 @@ func Config_List(
 // ----------------------------------------------------------------------------
 
 type Network struct {
-	NetworkID int64
-	Name      string
-	Network   []byte
+	NetworkID   int64
+	LocalDomain string
+	Network     []byte
 }
 
-const Network_SelectQuery = "SELECT NetworkID,Name,Network FROM networks"
+const Network_SelectQuery = "SELECT NetworkID,LocalDomain,Network FROM networks"
 
 func Network_Insert(
 	tx TX,
@@ -207,7 +207,7 @@ func Network_Insert(
 		return err
 	}
 
-	_, err = tx.Exec("INSERT INTO networks(NetworkID,Name,Network) VALUES(?,?,?)", row.NetworkID, row.Name, row.Network)
+	_, err = tx.Exec("INSERT INTO networks(NetworkID,LocalDomain,Network) VALUES(?,?,?)", row.NetworkID, row.LocalDomain, row.Network)
 	return err
 }
 
@@ -220,7 +220,7 @@ func Network_UpdateFull(
 		return err
 	}
 
-	result, err := tx.Exec("UPDATE networks SET Name=?,Network=? WHERE NetworkID=?", row.Name, row.Network, row.NetworkID)
+	result, err := tx.Exec("UPDATE networks SET LocalDomain=?,Network=? WHERE NetworkID=?", row.LocalDomain, row.Network, row.NetworkID)
 	if err != nil {
 		return err
 	}
@@ -270,8 +270,8 @@ func Network_Get(
 	err error,
 ) {
 	row = &Network{}
-	r := tx.QueryRow("SELECT NetworkID,Name,Network FROM networks WHERE NetworkID=?", NetworkID)
-	if err = r.Scan(&row.NetworkID, &row.Name, &row.Network); err != nil {
+	r := tx.QueryRow("SELECT NetworkID,LocalDomain,Network FROM networks WHERE NetworkID=?", NetworkID)
+	if err = r.Scan(&row.NetworkID, &row.LocalDomain, &row.Network); err != nil {
 		row = nil
 	}
 	return
@@ -287,7 +287,7 @@ func Network_GetWhere(
 ) {
 	row = &Network{}
 	r := tx.QueryRow(query, args...)
-	if err = r.Scan(&row.NetworkID, &row.Name, &row.Network); err != nil {
+	if err = r.Scan(&row.NetworkID, &row.LocalDomain, &row.Network); err != nil {
 		row = nil
 	}
 	return
@@ -309,7 +309,7 @@ func Network_Iterate(
 		defer rows.Close()
 		for rows.Next() {
 			row := &Network{}
-			err := rows.Scan(&row.NetworkID, &row.Name, &row.Network)
+			err := rows.Scan(&row.NetworkID, &row.LocalDomain, &row.Network)
 			if !yield(row, err) {
 				return
 			}

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
 		}

hub/api/db/tables.defs

@@ -4,9 +4,9 @@ TABLE config OF Config (
 );
 
 TABLE networks OF Network (
-  NetworkID int64 PK,
-  Name      string NoUpdate,
-  Network   []byte NoUpdate
+  NetworkID   int64 PK,
+  LocalDomain string NoUpdate,
+  Network     []byte NoUpdate
 );
 
 TABLE peers OF Peer (

hub/api/migrations/2024-11-30-init.sql

@@ -5,7 +5,7 @@ CREATE TABLE config (
 
 CREATE TABLE networks (
   NetworkID   INTEGER NOT NULL PRIMARY KEY,
-  Name        TEXT    NOT NULL UNIQUE, -- Network/interface name.
+  LocalDomain TEXT    NOT NULL UNIQUE, -- Network/interface name.
   Network     BLOB    NOT NULL UNIQUE  -- Network (/24), example 10.51.50.0
 ) WITHOUT ROWID;