/// <summary>
/// Connects to browse server on proxy
/// </summary>
/// <param name="endpoint">proxy endpoint or null for all proxies</param>
/// <param name="ct"></param>
/// <returns></returns>
public override async Task ConnectAsync(SocketAddress endpoint, CancellationToken ct)
{
IEnumerable <SocketAddress> addresses;
if (endpoint != null && endpoint.Family == AddressFamily.Bound)
{
// Unwrap bound address
endpoint = ((BoundSocketAddress)endpoint).LocalAddress;
}
if (endpoint == null || endpoint is NullSocketAddress)
{
_bindList = await Provider.NameService.LookupAsync(
Reference.All, NameRecordType.Proxy, ct).ConfigureAwait(false);
}
else
{
var bindList = new HashSet <INameRecord>();
if (endpoint.Family == AddressFamily.Collection)
{
// Unwrap collection
addresses = ((SocketAddressCollection)endpoint).Addresses();
}
else
{
addresses = endpoint.AsEnumerable();
}
foreach (var address in addresses)
{
var result = await Provider.NameService.LookupAsync(
address.ToString(), NameRecordType.Proxy, ct).ConfigureAwait(false);
bindList.AddRange(result);
}
_bindList = bindList;
}
if (!_bindList.Any())
{
throw new SocketException(SocketError.NoAddress);
}
// Connect to internal socket
_connected = await LinkAllAsync(_bindList,
new ProxySocketAddress("", _browsePort, (ushort)_codec), ct);
if (!_connected)
{
throw new SocketException(
"Could not link browse socket on proxy", SocketError.NoHost);
}
}
/// <summary>
/// Select the proxy to bind to
/// </summary>
/// <param name="endpoint"></param>
/// <param name="ct"></param>
/// <returns></returns>
public virtual async Task BindAsync(SocketAddress endpoint, CancellationToken ct)
{
// Proxy selected, look up name records for the proxy address
if (endpoint.Family == AddressFamily.Bound)
{
// Unwrap bound address
endpoint = ((BoundSocketAddress)endpoint).LocalAddress;
}
IEnumerable <SocketAddress> addresses;
if (endpoint.Family == AddressFamily.Collection)
{
// Unwrap collection
addresses = ((SocketAddressCollection)endpoint).Addresses();
}
else
{
addresses = endpoint.AsEnumerable();
}
var bindList = new HashSet <INameRecord>();
foreach (var address in addresses)
{
var result = await Provider.NameService.LookupAsync(
address.ToString(), NameRecordType.Proxy, ct).ConfigureAwait(false);
bindList.AddRange(result);
}
if (!bindList.Any())
{
throw new SocketException(SocketError.NoAddress);
}
_bindList = bindList;
}