Enable IPV6 support in the docker container

[navdhaagarwal]

I want to set up an Autograder for sockets that can bind and connect to IPv6 addresses. However, I am unable to do so. I ran an ifconfig command and found that the docker doesn't support IPv6.

I get the following output.

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.17.0.3  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:ac:11:00:03  txqueuelen 0  (Ethernet)
        RX packets 3956  bytes 30416227 (30.4 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3030  bytes 210766 (210.7 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Is there a way to enable IPv6?

[adam-brucker]

If you build a manual autograder https://gradescope-autograders.readthedocs.io/en/latest/manual_docker/ you should be able to configure this however you like. I have not tested it, but building your own is going to be the most robust for your use case.