func (handler *_TransProxyHandler) forward(server Server, message *gorpc.Message) error {
handler.V("forward tunnel(%s) message", handler.device)
tunnel := gorpc.NewTunnel()
tunnel.ID = handler.device
tunnel.Message = message
var buff bytes.Buffer
err := gorpc.WriteTunnel(&buff, tunnel)
if err != nil {
return err
}
message.Code = gorpc.CodeTunnel
message.Content = buff.Bytes()
err = server.SendMessage(message)
if err == nil {
handler.V("forward tunnel(%s) message(%p) -- success", handler.device, message)
} else {
handler.E("forward tunnel(%s) message -- failed\n%s", handler.device, err)
}
return err
}
func (handler *_TunnelClient) SendMessage(device *gorpc.Device, message *gorpc.Message) error {
tunnel := gorpc.NewTunnel()
tunnel.ID = device
tunnel.Message = message
var buff bytes.Buffer
err := gorpc.WriteTunnel(&buff, tunnel)
if err != nil {
return err
}
message.Code = gorpc.CodeTunnel
message.Content = buff.Bytes()
handler.context.Send(message)
return nil
}
func (handler *_TransProxyHandler) MessageReceived(context gorpc.Context, message *gorpc.Message) (*gorpc.Message, error) {
if message.Code == gorpc.CodeResponse {
if server, ok := handler.tunnel(message.Agent); ok {
err := handler.forward(server, message)
if err != nil {
context.Close()
}
return nil, err
}
return message, nil
}
if message.Code != gorpc.CodeRequest {
return message, nil
}
request, err := gorpc.ReadRequest(bytes.NewBuffer(message.Content))
if err != nil {
handler.E("[%s] unmarshal request error\n%s", handler.proxy.name, err)
return nil, err
}
service := request.Service
if transproxy, ok := handler.transproxy(service); ok {
handler.V("forward tunnel(%s) message", handler.device)
tunnel := gorpc.NewTunnel()
tunnel.ID = handler.device
tunnel.Message = message
var buff bytes.Buffer
err := gorpc.WriteTunnel(&buff, tunnel)
if err != nil {
return nil, err
}
message.Code = gorpc.CodeTunnel
message.Content = buff.Bytes()
err = transproxy.SendMessage(message)
if err != nil {
context.Close()
handler.V("forward tunnel(%s) message(%p) -- failed\n%s", handler.device, message, err)
return nil, err
}
handler.V("forward tunnel(%s) message(%p) -- success", handler.device, message)
return nil, err
}
return message, nil
}