sendMessage method

@override void sendMessage(List<int> message)

Send a message to this peer

Implementation

@override
void sendMessage(List<int> message) {
  // Check if peer is closed
  if (_closed) {
    throw ShspNetworkException(
      'Cannot send message: peer is closed',
      address: remotePeer.address.address,
      port: remotePeer.port,
    );
  }

  // Validate message is not empty
  if (message.isEmpty) {
    throw ShspValidationException(
      'Message cannot be empty',
      field: 'message',
      value: message,
    );
  }

  // Validate message size (UDP has a maximum packet size)
  if (message.length > maxMessageSize) {
    throw ShspValidationException(
      'Message size ${message.length} exceeds maximum $maxMessageSize bytes',
      field: 'message.length',
      value: message.length,
    );
  }

  // Note: sendTo is synchronous in Dart (UDP is non-blocking)
  int bytes = socket.sendTo(message, remotePeer);
  if (bytes == 0) {
    throw ShspNetworkException(
      'Failed to send message - socket buffer may be full',
      address: remotePeer.address.address,
      port: remotePeer.port,
    );
  }
}