[Libguestfs] [PATCH v2 API PROPOSAL 0/5] inspection Add network interfaces to inspection data.

[Richard W.M. Jones]

I wrote some code which can get this kind of information from the
Windows Registry:

    <interfaces>
      <interface name="Ethernet" type="unknown">
        <parameters>
          <parameter name="bootproto">dhcp</parameter>
          <parameter name="gateway">10.0.2.2</parameter>
          <parameter name="ipaddr">10.0.2.15</parameter>
          <parameter name="win:AddressType">0</parameter>
          <parameter name="win:DhcpConnForceBroadcastFlag">0</parameter>
          <parameter name="win:DhcpGatewayHardware">
</parameter>
          <parameter name="win:DhcpGatewayHardwareCount">1</parameter>
          <parameter name="win:DhcpNameServer">10.0.2.3</parameter>
          <parameter name="win:DhcpServer">10.0.2.2</parameter>
          <parameter name="win:DhcpSubnetMask">255.255.255.0</parameter>
          <parameter name="win:DhcpSubnetMaskOpt">255.255.255.0</parameter>
          <parameter name="win:Domain"></parameter>
          <parameter name="win:EnableDeadGWDetect">1</parameter>
          <parameter name="win:IsServerNapAware">0</parameter>
          <parameter name="win:Lease">86400</parameter>
          <parameter name="win:LeaseObtainedTime">1536802270</parameter>
          <parameter name="win:LeaseTerminatesTime">1536888670</parameter>
          <parameter name="win:NameServer"></parameter>
          <parameter name="win:RegisterAdapterName">0</parameter>
          <parameter name="win:RegistrationEnabled">1</parameter>
          <parameter name="win:T1">1536845470</parameter>
          <parameter name="win:T2">1536877870</parameter>
          <parameter name="win:UseZeroBroadcast">0</parameter>
        </parameters>
      </interface>
      <interface name="Local Area Connection* 9" type="unknown">
        <parameters>
          <parameter name="bootproto">dhcp</parameter>
          <parameter name="win:Domain"></parameter>
          <parameter name="win:EnableDeadGWDetect">1</parameter>
          <parameter name="win:NameServer"></parameter>
          <parameter name="win:RegisterAdapterName">0</parameter>
          <parameter name="win:RegistrationEnabled">1</parameter>
          <parameter name="win:UseZeroBroadcast">0</parameter>
        </parameters>
      </interface>
    </interfaces>

Unfortunately - no MAC address!

That screws up the plan greatly, since without the MAC address there
is no way to associate network adapters with hardware.

Well, that's not quite true.  There is some PCI address information
available.  For example for the above guest we have:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\{307052F7-EE0A-4FD2-8CE6-212EFDD711B0}\Connection]
"DefaultNameResourceId"=dword:0000076c
"DefaultNameTargetsPort"=dword:00000000
"Name"=str(1):"Ethernet"
"PnPInstanceId"=str(1):"PCI\VEN_10EC&DEV_8139&SUBSYS_11001AF4&REV_20\3&13C0B0C5&0&18"

It's not clear if we could go from this to a hypervisor network
interface however.

Also the MAC address of the guest is visible in some very obscure
places in the registry in binary blobs.

I don't think I've yet got a full picture of how network adapters are
stored in Windows.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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