Connect() call blocks (issue with nsca-ng server?)

[falzm]

Hi

It looks like there is a problem trying to connect to a nsca-ng server: when calling NSCAServer.Connect(), the code blocks. On the server side, it looks like this (IP address redacted):

nsca-ng: [DEBUG] Initializing connection context
nsca-ng: [DEBUG] Creating buffer (address: 0x7ea930)
nsca-ng: [DEBUG] Creating buffer (address: 0x7ea900)
nsca-ng: [DEBUG] Accepted connection from 88.x.y.z
nsca-ng: [DEBUG] Cannot accept connection right now
nsca-ng: [DEBUG] TLS handshake with 88.x.y.z not (yet) successful
nsca-ng: [DEBUG] Waiting for input from 88.x.y.z

I've tracked down the blocking point up to the nsca package, and the culprit is located at https://github.com/Syncbak-Git/nsca/blob/master/packet.go#L169

I've tried with ENCRYPT_NONE encryption and with ENCRYPT_XOR, same results... Have you any idea what could cause this problem?

[aerostitch]

Same issue, but nsca_ng has a different protocol which uses TLS connections and requires TLS_PSK_WITH_AES_256_CBC_SHA, and golang lib don't support this cipher suite yet. :(