Override permissions for disk recording.

disk/disk.go

@@ -53,6 +53,10 @@ func (client *Client) Credentials() group.ClientCredentials {
 	return group.ClientCredentials{"RECORDING", ""}
 }
 
+func (client *Client) OverridePermissions(g *group.Group) bool {
+	return true
+}
+
 func (client *Client) SetPermissions(perms group.ClientPermissions) {
 	return
 }

group/client.go

@@ -20,6 +20,7 @@ type Client interface {
 	Id() string
 	Credentials() ClientCredentials
 	SetPermissions(ClientPermissions)
+	OverridePermissions(*Group) bool
 	PushConn(id string, conn conn.Up, tracks []conn.UpTrack, label string) error
 	PushClient(id, username string, add bool) error
 }

group/group.go

@@ -271,16 +271,19 @@ func AddClient(name string, c Client) (*Group, error) {
 		return nil, err
 	}
 
+	override := c.OverridePermissions(g)
+
 	g.mu.Lock()
 	defer g.mu.Unlock()
 
 	perms, err := g.description.GetPermission(c.Credentials())
-	if err != nil {
+	if !override && err != nil {
 		return nil, err
 	}
 
 	c.SetPermissions(perms)
 
+	if !override {
 		if !perms.Op && g.locked != nil {
 			m := *g.locked
 			if m == "" {
@@ -294,6 +297,8 @@ func AddClient(name string, c Client) (*Group, error) {
 				return nil, UserError("too many users")
 			}
 		}
+	}
+
 	if g.clients[c.Id()] != nil {
 		return nil, ProtocolError("duplicate client id")
 	}

rtpconn/webclient.go

@@ -73,6 +73,10 @@ func (c *webClient) SetPermissions(perms group.ClientPermissions) {
 	c.permissions = perms
 }
 
+func (c *webClient) OverridePermissions(g *group.Group) bool {
+	return false
+}
+
 func (c *webClient) PushClient(id, username string, add bool) error {
 	kind := "add"
 	if !add {