Can't run inside a tmux session?

[schmitmd]

Hi there.

Any idea why I can't run this inside a tmux session? I get:

myuser@LAPTOP ~ % sudo ./wsl-vpnkit.sh
successfully created TAP device eth1
starting in connect mode with path=/var/run/wsl-vpnkit.sock and tap=eth1
Failure reading from socket: closing: Connection reset by peer
Failed to read hello from client
Failed to negotiate vmnet connection
Failure reading from socket: closing: Connection reset by peer
Failed to read hello from client
Failed to negotiate vmnet connection

But in a regular terminal:

myuser@LAPTOP ~ % sudo ./wsl-vpnkit.sh
vpnkit.exe: [INFO] Setting handler to ignore all SIGPIPE signals
vpnkit.exe: [INFO] Version is 218f01482560cba2fa863f9ad872ad51d1e717fc
vpnkit.exe: [INFO] System SOMAXCONN is 2147483647
vpnkit.exe: [INFO] Will use a listen backlog of 32
vpnkit.exe: [INFO] No periodic Gc.compact enabled
vpnkit.exe: [WARNING] There is no database: using hardcoded network configuration values
vpnkit.exe: [INFO] DNS server configured with no builtin DNS names; everything will be forwarded
vpnkit.exe: [INFO] 2 upstream DNS servers are configured
vpnkit.exe: [INFO] Disabling transparent HTTP redirection
vpnkit.exe: [INFO] Updating resolvers to use host resolver
vpnkit.exe: [INFO] Secure random number generator is available
vpnkit.exe: [INFO] Add(3): DNS configuration changed to: use host resolver
vpnkit.exe: [INFO] DNS server configured with builtin DNS names [ gateway.internal -> 192.168.67.1, host.internal -> 192.168.67.2, vm.internal -> 192.168.67.3 ]
vpnkit.exe: [INFO] Will use the host's DNS resolver
vpnkit.exe: [INFO] New Gateway forward configuration: []
vpnkit.exe: [INFO] Configuration server_macaddr = f6:16:36:bc:8a:c6; max_connection = None; dns_path = None; dns = ; resolver = Host; domain = None; allowed_bind_addresses = 0.0.0.0; gateway_ip = 192.168.67.1; host_ip = 192.168.67.2; lowest_ip = 192.168.67.3; highest_ip = 192.168.67.14; dhcp_json_path = None; dhcp_configuration = None; mtu = 1500; http_intercept = None; http_intercept_path = None; port_max_idle_time = 300; host_names = host.internal; gateway_names = gateway.internal; vm_names = vm.internal; udpv4_forwards = []; tcpv4_forwards = []; gateway_forwards_path = None; pcap_snaplen = 128
vpnkit.exe: [ERROR] Failed to parse address '' from hosts file
vpnkit.exe: [INFO] C:\Windows\System32\drivers\etc\hosts file has bindings for vmware-localhost vmware-localhost host.docker.internal gateway.docker.internal kubernetes.docker.internal
successfully created TAP device eth1
starting in connect mode with path=/var/run/wsl-vpnkit.sock and tap=eth1
vpnkit.exe: [INFO] Vmnet.Server.negotiate: received { magic = VMN3T; version = 22; commit =                                          }
Server reports version 22, commit 0123456789012345678901234567890123456789
vpnkit.exe: [INFO] Generated UUID on behalf of client: 0656efd6-6cfe-88af-a0f2-8a98a931cc47
vpnkit.exe: [INFO] Vmnet.Server.negotiate: received Ethernet 0656efd6-8cfe-49af-a0f2-8a98a931cc47
vpnkit.exe: [INFO] Vmnet.Server.negotiate: sending { mtu = 1500; max_packet_size = 1550; client_macaddr = 02:5a:00:00:00:01 }
vpnkit.exe: [INFO] Vmnet.Server.listen: rebinding the primary listen callback
vpnkit.exe: [INFO] Vmnet.Server.listen: starting event loop
vpnkit.exe: [INFO] Connected Ethernet interface f6:16:36:8a:f9:c6
VMNET VIF has MAC 02:5a:00:00:00:01
vpnkit.exe: [INFO] Client mac: 02:5a:00:00:00:01 server mac: f6:16:36:8a:f9:c6
vpnkit.exe: [INFO] TCP/IP ready
vpnkit.exe: [INFO] TCP/IP stack connected

And finally: Thank you SO much for this! Very creative and useful.

[sakai135]

I haven't found a solution, but the issue seems to be because calling a Windows process doesn't work using sudo inside tmux. The line below will work outside of tmux but doesn't seem to do anything inside tmux.

sudo /mnt/c/WINDOWS/system32/notepad.exe

[liath]

You need to preserve envvars with sudo -E . or set WSL_INTEROP.

[liath]

Idk why this is only a concern under tmux fwiw, there's probablly some magic happening somewhere. /shrug

[schmitmd]

It's just much easier to start up a tmux session and detach from it so that the window doesn't accidentally get closed or something. The sudo -E wsl-vpnkit.sh that you mentioned works like a charm. Thank you!!
@sakai135 , do you think you could tack this info into the README?

[sakai135]

@liath thanks for the info!

@schmitmd added the info to the readme