Function InspectNetNS

pkg/containerinspector/containerinspector_linux.go:30–64

(ctx context.Context, pid int)

)

func InspectNetNS(ctx context.Context, pid int) (*native.NetNS, error) {
	nsPath := fmt.Sprintf("/proc/%d/ns/net", pid)
	res := &native.NetNS{}
	fn := func(_ ns.NetNS) error {
		intf, err := net.Interfaces()
		if err != nil {
			return err
		}
		res.Interfaces = make([]native.NetInterface, len(intf))
		for i, f := range intf {
			x := native.NetInterface{
				Interface: f,
			}
			if f.HardwareAddr != nil {
				x.HardwareAddr = f.HardwareAddr.String()
			}
			if x.Interface.Flags.String() != "0" {
				x.Flags = strings.Split(x.Interface.Flags.String(), "|")
			}
			if addrs, err := x.Interface.Addrs(); err == nil {
				x.Addrs = make([]string, len(addrs))
				for j, a := range addrs {
					x.Addrs[j] = a.String()
				}
			}
			res.Interfaces[i] = x
		}
		res.PrimaryInterface = determinePrimaryInterface(res.Interfaces)
		return nil
	}
	if err := ns.WithNetNSPath(nsPath, fn); err != nil {
		return nil, err
	}
	return res, nil
}

// determinePrimaryInterface returns a net.Interface.Index value, not a slice index.
// Zero means no primary interface was detected.