public WebSocketFrame(
WebSocketFin fin,
WebSocketRsv rsv1,
WebSocketRsv rsv2,
WebSocketRsv rsv3,
WebSocketOpcode opcode,
WebSocketMask mask,
byte[] maskingKey,
byte payloadLength,
byte[] extPayloadLength,
Stream payload
)
{
if (mask == WebSocketMask.Mask && (maskingKey == null || maskingKey.Length != 4))
{
throw new ArgumentOutOfRangeException("maskingKey", "must by 4 bytes long");
}
_fin = fin;
_rsv1 = rsv1;
_rsv2 = rsv2;
_rsv3 = rsv3;
_opcode = opcode;
_mask = mask;
_maskingKey = maskingKey;
_payloadLength = payloadLength;
_extPayloadLength = extPayloadLength;
_payload = payload;
}
public WebSocketFrame(
WebSocketFin fin,
WebSocketRsv rsv1,
WebSocketRsv rsv2,
WebSocketRsv rsv3,
WebSocketOpcode opcode,
WebSocketMask mask,
byte[] maskingKey,
Stream payload
)
: this(fin, rsv1, rsv2, rsv3, opcode, mask, maskingKey, 0, new byte[0], payload)
{
if (payload != null)
{
var len = payload.Length;
if (len < 126)
{
_payloadLength = (byte)len;
_extPayloadLength = new byte[0];
}
else if (len < 0x010000)
{
_payloadLength = (byte)126;
_extPayloadLength = WebSocketUtils.GetBigEndianBytes((ushort)len);
}
else
{
_payloadLength = (byte)127;
_extPayloadLength = WebSocketUtils.GetBigEndianBytes((ulong)len);
}
}
}
public WebSocketFrame(
WebSocketFin fin,
WebSocketRsv rsv1,
WebSocketRsv rsv2,
WebSocketRsv rsv3,
WebSocketOpcode opcode,
WebSocketMask mask,
byte[] maskingKey,
Stream payload
)
: this(fin, rsv1, rsv2, rsv3, opcode, mask, maskingKey, 0, new byte[0], payload)
{
if (payload != null)
{
var len = payload.Length;
if (len < 126)
{
_payloadLength = (byte)len;
_extPayloadLength = new byte[0];
}
else if (len < 0x010000)
{
_payloadLength = (byte)126;
_extPayloadLength = WebSocketUtils.GetBigEndianBytes((ushort)len);
}
else
{
_payloadLength = (byte)127;
_extPayloadLength = WebSocketUtils.GetBigEndianBytes((ulong)len);
}
}
}
public WebSocketFrame(
WebSocketFin fin,
WebSocketRsv rsv1,
WebSocketRsv rsv2,
WebSocketRsv rsv3,
WebSocketOpcode opcode,
WebSocketMask mask,
byte[] maskingKey,
byte payloadLength,
byte[] extPayloadLength,
Stream payload
)
{
if (mask == WebSocketMask.Mask && (maskingKey == null || maskingKey.Length != 4))
throw new ArgumentOutOfRangeException("maskingKey", "must by 4 bytes long");
_fin = fin;
_rsv1 = rsv1;
_rsv2 = rsv2;
_rsv3 = rsv3;
_opcode = opcode;
_mask = mask;
_maskingKey = maskingKey;
_payloadLength = payloadLength;
_extPayloadLength = extPayloadLength;
_payload = payload;
}
public WebSocketFrame(
WebSocketFin fin,
WebSocketOpcode opcode,
WebSocketMask mask,
Stream payload
)
: this(fin, WebSocketRsv.Off, WebSocketRsv.Off, WebSocketRsv.Off, opcode, mask, mask == WebSocketMask.Mask ? WebSocketUtils.CreateMaskingKey() : new byte[0], payload)
{
}
/// <summary>
/// Applies the current masking key on the payload
/// </summary>
public void Unmask()
{
if (Mask == WebSocketMask.Unmask)
{
return;
}
_mask = WebSocketMask.Unmask;
if (Payload != null)
{
using (Payload)
{
var unmasked = new MemoryStream((int)Payload.Length);
Payload.Position = 0;
for (var i = 0; i < Payload.Length; i++)
{
unmasked.WriteByte((byte)(Payload.ReadByte() ^ MaskingKey[i % 4]));
}
unmasked.Position = 0;
_payload = unmasked;
}
}
_maskingKey = new byte[0];
}
public WebSocketFrame(
WebSocketFin fin,
WebSocketOpcode opcode,
WebSocketMask mask,
Stream payload
)
: this(fin, WebSocketRsv.Off, WebSocketRsv.Off, WebSocketRsv.Off, opcode, mask, mask == WebSocketMask.Mask ? WebSocketUtils.CreateMaskingKey() : new byte[0], payload)
{
}
/// <summary>
/// Applies the current masking key on the payload
/// </summary>
public void Unmask()
{
if (Mask == WebSocketMask.Unmask)
return;
_mask = WebSocketMask.Unmask;
if (Payload != null)
{
using (Payload)
{
var unmasked = new MemoryStream((int)Payload.Length);
Payload.Position = 0;
for (var i = 0; i < Payload.Length; i++)
{
unmasked.WriteByte((byte)(Payload.ReadByte() ^ MaskingKey[i % 4]));
}
unmasked.Position = 0;
_payload = unmasked;
}
}
_maskingKey = new byte[0];
}
