private void HandleRetransmittedHandshakeRecord(int epoch, byte[] buf, int off, int len)
{
if (len < 12)
{
return;
}
int num = TlsUtilities.ReadUint24(buf, off + 9);
if (len != num + 12)
{
return;
}
int num2 = TlsUtilities.ReadUint16(buf, off + 4);
if (num2 >= this.mNextReceiveSeq)
{
return;
}
byte b = TlsUtilities.ReadUint8(buf, off);
int num3 = (b == 20) ? 1 : 0;
if (epoch != num3)
{
return;
}
int num4 = TlsUtilities.ReadUint24(buf, off + 1);
int num5 = TlsUtilities.ReadUint24(buf, off + 6);
if (num5 + num > num4)
{
return;
}
DtlsReassembler dtlsReassembler = (DtlsReassembler)this.mCurrentInboundFlight[num2];
if (dtlsReassembler != null)
{
dtlsReassembler.ContributeFragment(b, num4, buf, off + 12, num5, num);
if (DtlsReliableHandshake.CheckAll(this.mCurrentInboundFlight))
{
this.ResendOutboundFlight();
DtlsReliableHandshake.ResetAll(this.mCurrentInboundFlight);
}
}
}
internal DtlsReliableHandshake.Message ReceiveMessage()
{
if (this.mSending)
{
this.mSending = false;
this.PrepareInboundFlight();
}
DtlsReassembler dtlsReassembler = (DtlsReassembler)this.mCurrentInboundFlight[this.mNextReceiveSeq];
if (dtlsReassembler != null)
{
byte[] bodyIfComplete = dtlsReassembler.GetBodyIfComplete();
if (bodyIfComplete != null)
{
this.mPreviousInboundFlight = null;
return(this.UpdateHandshakeMessagesDigest(new DtlsReliableHandshake.Message(this.mNextReceiveSeq++, dtlsReassembler.MsgType, bodyIfComplete)));
}
}
byte[] array = null;
int num = 1000;
DtlsReliableHandshake.Message result;
while (true)
{
int receiveLimit = this.mRecordLayer.GetReceiveLimit();
if (array != null && array.Length >= receiveLimit)
{
goto IL_92;
}
array = new byte[receiveLimit];
try
{
DtlsReassembler dtlsReassembler3;
byte[] bodyIfComplete2;
while (true)
{
IL_92:
int num2 = this.mRecordLayer.Receive(array, 0, receiveLimit, num);
if (num2 < 0)
{
goto IL_214;
}
if (num2 >= 12)
{
int num3 = TlsUtilities.ReadUint24(array, 9);
if (num2 == num3 + 12)
{
int num4 = TlsUtilities.ReadUint16(array, 4);
if (num4 <= this.mNextReceiveSeq + 10)
{
byte msg_type = TlsUtilities.ReadUint8(array, 0);
int num5 = TlsUtilities.ReadUint24(array, 1);
int num6 = TlsUtilities.ReadUint24(array, 6);
if (num6 + num3 <= num5)
{
if (num4 < this.mNextReceiveSeq)
{
if (this.mPreviousInboundFlight != null)
{
DtlsReassembler dtlsReassembler2 = (DtlsReassembler)this.mPreviousInboundFlight[num4];
if (dtlsReassembler2 != null)
{
dtlsReassembler2.ContributeFragment(msg_type, num5, array, 12, num6, num3);
if (DtlsReliableHandshake.CheckAll(this.mPreviousInboundFlight))
{
this.ResendOutboundFlight();
num = Math.Min(num * 2, 60000);
DtlsReliableHandshake.ResetAll(this.mPreviousInboundFlight);
}
}
}
}
else
{
dtlsReassembler3 = (DtlsReassembler)this.mCurrentInboundFlight[num4];
if (dtlsReassembler3 == null)
{
dtlsReassembler3 = new DtlsReassembler(msg_type, num5);
this.mCurrentInboundFlight[num4] = dtlsReassembler3;
}
dtlsReassembler3.ContributeFragment(msg_type, num5, array, 12, num6, num3);
if (num4 == this.mNextReceiveSeq)
{
bodyIfComplete2 = dtlsReassembler3.GetBodyIfComplete();
if (bodyIfComplete2 != null)
{
break;
}
}
}
}
}
}
}
}
this.mPreviousInboundFlight = null;
result = this.UpdateHandshakeMessagesDigest(new DtlsReliableHandshake.Message(this.mNextReceiveSeq++, dtlsReassembler3.MsgType, bodyIfComplete2));
break;
IL_214 :;
}
catch (IOException)
{
}
this.ResendOutboundFlight();
num = Math.Min(num * 2, 60000);
}
return(result);
}
