public static unsafe byte[] ToByteArray(List <SslApplicationProtocol> applicationProtocols)
{
long protocolListSize = 0;
for (int i = 0; i < applicationProtocols.Count; i++)
{
int protocolLength = applicationProtocols[i].Protocol.Length;
if (protocolLength == 0 || protocolLength > byte.MaxValue)
{
throw new ArgumentException(SR.net_ssl_app_protocols_invalid, nameof(applicationProtocols));
}
protocolListSize += protocolLength + 1;
if (protocolListSize > short.MaxValue)
{
throw new ArgumentException(SR.net_ssl_app_protocols_invalid, nameof(applicationProtocols));
}
}
Sec_Application_Protocols protocols = default;
int protocolListConstSize = sizeof(Sec_Application_Protocols) - sizeof(uint) /* offsetof(Sec_Application_Protocols, ProtocolExtensionType) */;
protocols.ProtocolListsSize = (uint)(protocolListConstSize + protocolListSize);
protocols.ProtocolExtensionType = ApplicationProtocolNegotiationExt.ALPN;
protocols.ProtocolListSize = (short)protocolListSize;
byte[] buffer = new byte[sizeof(Sec_Application_Protocols) + protocolListSize];
int index = 0;
MemoryMarshal.Write(buffer.AsSpan(index), ref protocols);
index += sizeof(Sec_Application_Protocols);
for (int i = 0; i < applicationProtocols.Count; i++)
{
ReadOnlySpan <byte> protocol = applicationProtocols[i].Protocol.Span;
buffer[index++] = (byte)protocol.Length;
protocol.CopyTo(buffer.AsSpan(index));
index += protocol.Length;
}
return(buffer);
}
public static unsafe byte[] ToByteArray(List <SslApplicationProtocol> applicationProtocols)
{
long protocolListSize = 0;
for (int i = 0; i < applicationProtocols.Count; i++)
{
if (applicationProtocols[i].Protocol.Length == 0 || applicationProtocols[i].Protocol.Length > byte.MaxValue)
{
throw new ArgumentException(SR.net_ssl_app_protocols_invalid, nameof(applicationProtocols));
}
protocolListSize += applicationProtocols[i].Protocol.Length + 1;
if (protocolListSize > short.MaxValue)
{
throw new ArgumentException(SR.net_ssl_app_protocols_invalid, nameof(applicationProtocols));
}
}
Sec_Application_Protocols protocols = new Sec_Application_Protocols();
protocols.ProtocolListsSize = (uint)(ProtocolListConstSize + protocolListSize);
protocols.ProtocolExtenstionType = ApplicationProtocolNegotiationExt.ALPN;
protocols.ProtocolListSize = (short)protocolListSize;
Span <byte> pBuffer = new byte[protocolListSize];
int index = 0;
for (int i = 0; i < applicationProtocols.Count; i++)
{
pBuffer[index++] = (byte)applicationProtocols[i].Protocol.Length;
applicationProtocols[i].Protocol.Span.CopyTo(pBuffer.Slice(index));
index += applicationProtocols[i].Protocol.Length;
}
byte[] buffer = new byte[ProtocolListOffset + protocolListSize];
fixed(byte *bufferPtr = buffer)
{
Marshal.StructureToPtr(protocols, new IntPtr(bufferPtr), false);
byte *pList = bufferPtr + ProtocolListOffset;
pBuffer.CopyTo(new Span <byte>(pList, index));
}
return(buffer);
}
