Ejemplo n.º 1
0
func setFqCodelFd(iface netlink.Link, path string) error {
	fd, err := netlink.BpfOpen(path)
	if err != nil {
		return fmt.Errorf("failed loading bpf program %v", err)
	}
	defer syscall.Close(fd)
	fq := &netlink.GenericQdisc{
		QdiscAttrs: netlink.QdiscAttrs{
			LinkIndex: iface.Attrs().Index,
			Handle:    netlink.MakeHandle(1, 0),
			Parent:    netlink.HANDLE_ROOT,
		},
		QdiscType: "fq_codel",
	}
	if err := netlink.QdiscAdd(fq); err != nil {
		return fmt.Errorf("failed setting egress qdisc: %v", err)
	}
	u32 := &netlink.U32{
		FilterAttrs: netlink.FilterAttrs{
			LinkIndex: iface.Attrs().Index,
			Parent:    fq.QdiscAttrs.Handle,
			Protocol:  syscall.ETH_P_ALL,
			//Handle:    10,
			//Priority:  10,
		},
		ClassId: netlink.MakeHandle(1, 2),
		BpfFd:   fd,
	}
	if err := netlink.FilterAdd(u32); err != nil {
		return fmt.Errorf("failed adding egress filter: %v", err)
	}
	return nil
}
Ejemplo n.º 2
0
func setIngressFd(iface netlink.Link, path string) error {
	fd, err := netlink.BpfOpen(path)
	if err != nil {
		return fmt.Errorf("failed loading bpf program %v", err)
	}
	defer syscall.Close(fd)
	ingress := &netlink.Ingress{
		QdiscAttrs: netlink.QdiscAttrs{
			LinkIndex: iface.Attrs().Index,
			Handle:    netlink.MakeHandle(0xffff, 0),
			Parent:    netlink.HANDLE_INGRESS,
		},
	}
	if err := netlink.QdiscAdd(ingress); err != nil {
		return fmt.Errorf("failed setting ingress qdisc: %v", err)
	}
	u32 := &netlink.U32{
		FilterAttrs: netlink.FilterAttrs{
			LinkIndex: iface.Attrs().Index,
			Parent:    ingress.QdiscAttrs.Handle,
			Priority:  1,
			Protocol:  syscall.ETH_P_ALL,
		},
		ClassId: netlink.MakeHandle(1, 1),
		BpfFd:   fd,
	}
	if err := netlink.FilterAdd(u32); err != nil {
		return fmt.Errorf("failed adding ingress filter: %v", err)
	}
	return nil
}