class Inspec::Resources::BsdInterface

def interface_info(iface)
  cmd = inspec.command("ifconfig #{iface}")
  return nil if cmd.exit_status.to_i != 0
  lines = cmd.stdout.split("\n")
  iface_info = {
    name: iface,
    ipv4_addresses: [], # Actually CIDRs
    ipv6_addresses: [], # are expected to go here
  }
  iface_info[:up] = lines[0].include?("UP")
  lines.each do |line|
    # IPv4 case
    m = line.match(/^\s+inet\s+((?:\d{1,3}\.){3}\d{1,3})\s+netmask\s+(0x[a-f0-9]{8})/)
    if m
      ip = m[1]
      hex_mask = m[2]
      cidr = hex_mask.to_i(16).to_s(2).count("1")
      iface_info[:ipv4_addresses] << "#{ip}/#{cidr}"
      next
    end
    # IPv6 case
    m = line.match(/^\s+inet6\s+([a-f0-9:]+)%#{iface}\s+prefixlen\s+(\d+)/)
    if m
      ip = m[1]
      cidr = m[2]
      iface_info[:ipv6_addresses] << "#{ip}/#{cidr}"
      next
    end
    # Speed detect, crummy - can't detect wifi, finds any number in the string
    # Ethernet autoselect (1000baseT <full-duplex>)
    m = line.match(/^\s+media:\D+(\d+)/)
    if m
      iface_info[:speed] = m[1].to_i
      next
    end
  end
  iface_info
end