/// <summary>
/// Initializes a new instance of the <see cref="Channel"/> class.
/// </summary>
/// <param name="multiplexingStream">The owning <see cref="Streams.MultiplexingStream"/>.</param>
/// <param name="channelId">The party-qualified ID of the channel.</param>
/// <param name="offerParameters">The parameters of the channel from the offering party.</param>
/// <param name="channelOptions">The channel options. Should only be null if the channel is created in response to an offer that is not immediately accepted.</param>
internal Channel(MultiplexingStream multiplexingStream, QualifiedChannelId channelId, OfferParameters offerParameters, ChannelOptions?channelOptions = null)
{
Requires.NotNull(multiplexingStream, nameof(multiplexingStream));
Requires.NotNull(offerParameters, nameof(offerParameters));
this.MultiplexingStream = multiplexingStream;
this.channelId = channelId;
this.OfferParams = offerParameters;
switch (channelId.Source)
{
case ChannelSource.Local:
this.localWindowSize = offerParameters.RemoteWindowSize;
break;
case ChannelSource.Remote:
this.remoteWindowSize = offerParameters.RemoteWindowSize;
break;
case ChannelSource.Seeded:
this.remoteWindowSize = offerParameters.RemoteWindowSize;
this.localWindowSize = offerParameters.RemoteWindowSize;
break;
default:
throw new NotSupportedException();
}
if (channelOptions == null)
{
this.optionsAppliedTaskSource = new TaskCompletionSource <object?>();
}
else
{
this.ApplyChannelOptions(channelOptions);
}
}
protected FrameHeader CreateFrameHeader(ControlCode code, ulong?channelId, ChannelSource?channelSource)
{
QualifiedChannelId?qualifiedId = null;
if (channelId.HasValue)
{
if (!channelSource.HasValue)
{
Assumes.True(this.IsOddEndpoint.HasValue);
bool channelIsOdd = channelId.Value % 2 == 1;
// Remember that this is from the remote sender's point of view.
channelSource = channelIsOdd == this.IsOddEndpoint.Value ? ChannelSource.Remote : ChannelSource.Local;
}
qualifiedId = new QualifiedChannelId(channelId.Value, channelSource.Value);
}
return(new FrameHeader
{
Code = code,
ChannelId = qualifiedId,
});
}
/// <summary>
/// Initializes a new instance of the <see cref="ChannelOfferEventArgs"/> class.
/// </summary>
/// <param name="id">The unique ID of the channel.</param>
/// <param name="name">The name of the channel.</param>
/// <param name="isAccepted">A value indicating whether the channel has already been accepted.</param>
internal ChannelOfferEventArgs(QualifiedChannelId id, string name, bool isAccepted)
{
this.QualifiedId = id;
this.Name = name;
this.IsAccepted = isAccepted;
}