/// <summary>
/// Gets the identity information of the remote peer.
/// </summary>
/// <param name="connection">
/// The currenty connection to the remote peer.
/// </param>
/// <param name="cancel"></param>
/// <returns></returns>
public async Task <Peer> GetRemotePeer(PeerConnection connection, CancellationToken cancel)
{
var muxer = await connection.MuxerEstablished.Task;
log.Debug("Get remote identity");
Peer remote = connection.RemotePeer;
using (var stream = await muxer.CreateStreamAsync("id", cancel))
{
await connection.EstablishProtocolAsync("/multistream/", stream, cancel);
await connection.EstablishProtocolAsync("/ipfs/id/", stream, cancel);
var info = await ProtoBufHelper.ReadMessageAsync <Identify>(stream, cancel);
if (remote == null)
{
remote = new Peer();
connection.RemotePeer = remote;
}
remote.AgentVersion = info.AgentVersion;
remote.ProtocolVersion = info.ProtocolVersion;
if (info.PublicKey == null || info.PublicKey.Length == 0)
{
throw new InvalidDataException("Public key is missing.");
}
remote.PublicKey = Convert.ToBase64String(info.PublicKey);
if (remote.Id == null)
{
remote.Id = MultiHash.ComputeHash(info.PublicKey);
}
if (info.ListenAddresses != null)
{
remote.Addresses = info.ListenAddresses
.Select(b =>
{
try
{
return(new MultiAddress(b));
}
catch
{
return(null);
}
})
.Where(a => a != null)
.ToList();
}
}
// TODO: Verify the Peer ID
connection.IdentityEstablished.TrySetResult(remote);
log.Debug($"Peer id '{remote}' of {connection.RemoteAddress}");
return(remote);
}
/// <inheritdoc />
public async Task ProcessMessageAsync(PeerConnection connection,
Stream stream,
CancellationToken cancel = default)
{
connection.SecurityEstablished.SetResult(true);
await connection.EstablishProtocolAsync("/multistream/", CancellationToken.None).ConfigureAwait(false);
}
/// <summary>
/// Gets the identity information of the remote peer.
/// </summary>
/// <param name="connection">
/// The currenty connection to the remote peer.
/// </param>
/// <param name="cancel"></param>
/// <returns></returns>
public async Task <Peer> GetRemotePeerAsync(PeerConnection connection, CancellationToken cancel)
{
var muxer = await connection.MuxerEstablished.Task.ConfigureAwait(false);
log.Debug("Get remote identity");
Peer remote = connection.RemotePeer;
if (remote == null)
{
remote = new Peer();
connection.RemotePeer = remote;
}
// Read the remote peer identify info.
using (var stream = await muxer.CreateStreamAsync("id", cancel).ConfigureAwait(false))
{
await connection.EstablishProtocolAsync("/multistream/", stream, cancel).ConfigureAwait(false);
await connection.EstablishProtocolAsync("/ipfs/id/", stream, cancel).ConfigureAwait(false);
await UpdateRemotePeerAsync(remote, stream, cancel).ConfigureAwait(false);
}
// It should always contain the address we used for connections, so
// that NAT translations are maintained.
if (connection.RemoteAddress != null && !remote.Addresses.Contains(connection.RemoteAddress))
{
var addrs = remote.Addresses.ToList();
addrs.Add(connection.RemoteAddress);
remote.Addresses = addrs;
}
connection.IdentityEstablished.TrySetResult(remote);
log.Debug($"Peer id '{remote}' of {connection.RemoteAddress}");
return(remote);
}