Ping using specific interface (SO_BINDTODEVICE error)

[Skywalker-11]

• Your Windows build number: (Type ver at a Windows Command Prompt)
  Microsoft Windows [Version 10.0.17134.165]

• What you're doing and what's happening: (Copy&paste specific commands and their output, or include screen shots)

1. install WSL feature
2. install Debian GNU/Linux from MS store
3. open the app (opens bash command line)
4. sudo su (optional, result same with and without)
5. ping -I eth3 google.com or ping -I eth3 -4 google.com or ping -I eth3 -6 google.com

• What's wrong / what should be happening instead:
  It should execute a ping using a specific network device (here eth3 - hosts lan connection)
  What actually happens for ipv4 destination (-4 argument or ipv4-only host)

ping -I eth3 -4 google.com
ping: SO_BINDTODEVICE: Invalid argument

For ipv6 enabled destination

ping -6 -I eth3 google.com
setsockopt(SO_BINDTODEVICE): Protocol not available

• Strace of the failing command, if applicable: (If some_command is failing, then run strace -o some_command.strace -f some_command some_args, and link the contents of some_command.strace in a gist here).
  Gist with straces: https://gist.github.com/Skywalker-11/4e9fa7550918fdeb11a0de451e2ce904

Ping without -I argument for using a specific interface is working correctly

[therealkenc]

Fair enough given #69 (MESSAGE) but really this is spiritually dupe #1349. nmap does the same thing here.

[ed] FWIW I worked around it here by doing (...wait for it...) nothing. Which at least mitigates this bug (or lack of feature) from a "ping -I results in Protocol not available error" hard fail, to a somewhat softer "ping -I goes out the wrong interface if you pick the wrong one".

socket(AF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
capget({version=_LINUX_CAPABILITY_VERSION_3, pid=0}, NULL) = -1 EFAULT (Bad address)
capget({version=_LINUX_CAPABILITY_VERSION_3, pid=0}, {effective=0, permitted=1<<CAP_NET_ADMIN|1<<CAP_NET_RAW, inheritable=0}) = 0
capset({version=_LINUX_CAPABILITY_VERSION_3, pid=0}, {effective=1<<CAP_NET_RAW, permitted=1<<CAP_NET_ADMIN|1<<CAP_NET_RAW, inheritable=0}) = 0
setsockopt(4, SOL_SOCKET, SO_BINDTODEVICE, "eth3\0", 5) = -1 ENOPROTOOPT (Protocol not available)