/// <summary>
/// Occurs when the remote party has accepted our offer of this channel.
/// </summary>
/// <param name="acceptanceParameters">The channel parameters provided by the accepting party.</param>
/// <returns>A value indicating whether the acceptance went through; <c>false</c> if the channel is already accepted, rejected or offer rescinded.</returns>
internal bool OnAccepted(AcceptanceParameters acceptanceParameters)
{
lock (this.SyncObject)
{
if (this.acceptanceSource.TrySetResult(acceptanceParameters))
{
this.remoteWindowSize = acceptanceParameters.RemoteWindowSize;
return(true);
}
return(false);
}
}
/// <summary>
/// Accepts an offer made by the remote party.
/// </summary>
/// <param name="channelOptions">The options to apply to the channel.</param>
/// <returns>A value indicating whether the offer was accepted. It may fail if the channel was already closed or the offer rescinded.</returns>
internal bool TryAcceptOffer(ChannelOptions channelOptions)
{
lock (this.SyncObject)
{
// If the local window size has already been determined, we have to keep that since it can't be expanded once the Pipe is created.
// Otherwise use what the ChannelOptions asked for, so long as it is no smaller than the default channel size, since we can't make it smaller either.
this.localWindowSize ??= channelOptions.ChannelReceivingWindowSize is long windowSize?Math.Max(windowSize, this.MultiplexingStream.DefaultChannelReceivingWindowSize) : this.MultiplexingStream.DefaultChannelReceivingWindowSize;
}
var acceptanceParameters = new AcceptanceParameters(this.localWindowSize.Value);
if (this.acceptanceSource.TrySetResult(acceptanceParameters))
{
if (this.QualifiedId.Source != ChannelSource.Seeded)
{
var payload = this.MultiplexingStream.formatter.Serialize(acceptanceParameters);
this.MultiplexingStream.SendFrame(
new FrameHeader
{
Code = ControlCode.OfferAccepted,
ChannelId = this.QualifiedId,
},
payload,
CancellationToken.None);
}
try
{
this.ApplyChannelOptions(channelOptions);
return(true);
}
catch (ObjectDisposedException)
{
// A (harmless) race condition was hit.
// Swallow it and return false below.
}
}
return(false);
}
