Port forwarding unique checking does not use IP address

[andkirby]

In a nutshell, there is no ability to forward the same port of different IP addresses to a guest OS.

E.g.:
Host 127.0.0.111:80 => guest 8011
Host 127.0.0.222:80 => guest 8022

Vagrant version

1.8.6

Host operating system

Windows 10

Guest operating system

CentOS

Vagrantfile

VAGRANTFILE_API_VERSION = '2'

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.box = 'centos/7'
  config.vm.box_check_update = false
  config.vm.boot_timeout = 300

  config.vm.network 'forwarded_port', guest: 8011, host: 80, host_ip: '127.0.0.111', id: 'aaa'
  config.vm.network 'forwarded_port', guest: 8022, host: 80, host_ip: '127.0.0.222', id: 'bbb'
end

Expected behavior

Added ports forwarding as expected:

• Host 127.0.0.111:80 => guest 8011
• Host 127.0.0.222:80 => guest 8022

Actual behavior

Error output

There are errors in the configuration of this machine. Please fix
the following errors and try again:

vm:
* Forwarded port '80' (host port) is declared multiple times
with the protocol 'tcp'.

Steps to reproduce

1. Run vagrant up in the same directory as Vagrantfile

References

I have found the code which responsible for this:
https://github.com/mitchellh/vagrant/blob/7eb1091a7102dd4d2ebab762ee1658689a889880/plugins/kernel_v2/config/vm.rb#L688

In my understanding there is the host_ip option should be used. And, seem, guest_ip (without it, it will produce the same problem but on the guest side.)

[andkirby]

Stackoverflow issue.

[andkirby]

P.S.
Seem, the method VagrantPlugins::Kernel_V2::VMConfig::validate() is really huge. Can it be refactored?.. If it will be split, it would be easier to overwrite code parts.

[chrisroberts]

#7035

[chrisroberts]

Fixed via: #7035

[ghost]

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