Some networks may have null ifaces, I guess?

Seems like a bug further upstream, but guard ourselves against it
for now.

Bug: 17033841
Change-Id: Id0e5895c3389b63d4e34b1fb064efef8b72cd609
1 file changed
tree: 7f73b26a89e4015b2ccc5596ed9ad9ba8597ca7a
  1. core/
  2. services/
  3. tests/