dial attempt failed: protocol not supported

[lzl124631x]

I'm trying to setup my own peer discovery, but when I try to use my node (almost the same as the chat-with-rendezvous) to connect bootnode, I got dial attempt failed: <peer.ID Qm*xL1oRV> --> <peer.ID Qm*hjxBgo> dial attempt failed: protocol not supported from the following code:

go func() {
	defer wg.Done()
	if err := host.Connect(ctx, *peerinfo); err != nil {
		logger.Warning(err)
	} else {
		logger.Info("Connection established with bootstrap node:", *peerinfo)
	}
}()

This error was thrown in swarm_dial.go dialAddr. But I don't understand what the protocol means here.

• It shouldn't be the protocolID used in Stream, since it's before trying to set up the stream.
• Was it talking about protocol like TCP?

[Stebalien]

What options are you passing to libp2p.New?

[lzl124631x]

Oh, you remind me that I used NoSecure for my own node, but the chat example node is not using that. Will this cause issue?

The config for my node:

libp2p.New(context.Background(),
		libp2p.ListenAddrs(sourceAddr),
		libp2p.NoSecurity, // The security (signature generation and verification) is, for now, taken care by ourselves.
	)

[lzl124631x]

@Stebalien It works if I also add libp2p.NoSecurity to the bootnode. Thanks for the hint! I've been checking the peer discovery related code but didn't realize the issue is at the very beginning.

I hope we can refine the error message so that we can easily pinpoint the issue, e.g. dial failed due to incompatible security setup.

[Stebalien]

Oh, you remind me that I used NoSecure for my own node, but the chat example node is not using that. Will this cause issue?

libp2p/go-libp2p-transport-upgrader#11