Both client A and client B throw EADDRINUSE #7
Description
First, thank you for this little sample! It's so exciting to get it to work with minimal dependencies.
My issue looks different than the other two already filed. My public server runs on a host with a public IP. My client A and client B run behind their own NAT. Both of them are on Linux. I have this issue on Ubuntu 18.04 and Debian Stretch. Node version is 8.9.4 or 6.14.2.
$ node clientA.js
> (A->S) connecting to S
> (A->S) connected to S via 192.168.0.188 44808
> (A->S) response from S: {"name":"A","localAddress":"192.168.0.188","localPort":44808,"remoteAddress":"172.58.36.250","remotePort":43526}
> (A) 192.168.0.188:44808 ===> (NAT of A) 172.58.36.250:43526 ===> (S) 104.198.1.109:9999
> (A->S) response from S: {"name":"B","localAddress":"192.168.86.108","localPort":42688,"remoteAddress":"107.194.153.239","remotePort":42688}
> (A) time to listen on port used to connect to S (44808)
> (A->B) connecting to B: ===> (B) 107.194.153.239:42688
events.js:183
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE 192.168.0.188:44808
at Object._errnoException (util.js:1024:11)
at _exceptionWithHostPort (util.js:1046:20)
at Server.setupListenHandle [as _listen2] (net.js:1351:14)
at listenInCluster (net.js:1392:12)
at doListen (net.js:1501:7)
at _combinedTickCallback (internal/process/next_tick.js:141:11)
at process._tickCallback (internal/process/next_tick.js:180:9)
$ node clientB.js
> (B->S) connecting to S
> (B->S) connected to S via 192.168.86.108 42688
> (B->S) response from S: {"name":"B","localAddress":"192.168.86.108","localPort":42688,"remoteAddress":"107.194.153.239","remotePort":42688}
> (B) 192.168.86.108:42688 ===> (NAT of B) 107.194.153.239:42688 ===> (S) 104.198.1.109:9999
> (B->S) response from S: {"name":"A","localAddress":"192.168.0.188","localPort":44808,"remoteAddress":"172.58.36.250","remotePort":43526}
> (B) time to listen on port used to connect to S (42688)
> (B->A) connecting to A: ===> (A) 172.58.36.250:43526
events.js:183
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE 192.168.86.108:42688
at Object._errnoException (util.js:1024:11)
at _exceptionWithHostPort (util.js:1046:20)
at Server.setupListenHandle [as _listen2] (net.js:1351:14)
at listenInCluster (net.js:1392:12)
at doListen (net.js:1501:7)
at _combinedTickCallback (internal/process/next_tick.js:141:11)
at process._tickCallback (internal/process/next_tick.js:180:9)
Apparently, this line failed:
socketToS = require('net').createConnection({host : addressOfS, port : portOfS}, function () {
...
});