public NetMQMessage Alert(AlertLevel alertLevel, AlertDescription alertDescription)
{
NetMQMessage message = new NetMQMessage();
message.Append(new[] { (byte)ContentType.Alert });
message.Append(ProtocolVersion.ToArray());
if (ProtocolVersion.SequenceEqual(Constants.V3_3))
{
message.Append(new byte[2] {
0, 2
});
}
message.Append(new byte[1] {
(byte)alertLevel
});
message.Append(new byte[1] {
(byte)alertDescription
});
return(message);
}
} /// <summary>
/// 包装成RecordLayer
/// </summary>
/// <param name="contentType">This identifies the type of content: ChangeCipherSpec, Handshake, or ApplicationData.</param>
/// <param name="plainMessage">The unencrypted form of the message to be encrypted.</param>
/// <returns></returns>
internal byte[] WrapToRecordLayerMessage(ContentType contentType, byte[] bytes)
{
//将数据加密
//Change Cipher Spec 步骤之前返回明文
byte[] encryptedBytes = RecordLayer.EncryptMessage(contentType, bytes);
byte[] recordLayerBytes = new byte[encryptedBytes.Length + 5];
recordLayerBytes[0] = (byte)contentType;
recordLayerBytes[1] = ProtocolVersion[0];
recordLayerBytes[2] = ProtocolVersion[1];
/// ContentType type;change_cipher_spec(20), alert(21), handshake(22), application_data(23), (255)
/// ProtocolVersion version;33
/// uint16 length;
/// opaque fragment[TLSPlaintext.length];
if (ProtocolVersion.SequenceEqual(Constants.V3_3))
{
//增加长度
byte[] lengthBytes = encryptedBytes.LengthToBytes(2);
Buffer.BlockCopy(lengthBytes, 0, recordLayerBytes, 3, lengthBytes.Length);
}
Buffer.BlockCopy(encryptedBytes, 0, recordLayerBytes, 5, encryptedBytes.Length);
return(recordLayerBytes);
}
