Exemplo 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
}
Exemplo n.º 2
0
func setFqCodelFd(ifc, fd int) error {
	fq := &netlink.GenericQdisc{
		QdiscAttrs: netlink.QdiscAttrs{
			LinkIndex: ifc,
			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: ifc,
			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
}
Exemplo n.º 3
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
}
Exemplo n.º 4
0
func setIngressFd(ifc, fd int) error {
	ingress := &netlink.Ingress{
		QdiscAttrs: netlink.QdiscAttrs{
			LinkIndex: ifc,
			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: ifc,
			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
}
Exemplo n.º 5
0
func ensureQdisc(link netlink.Link, qdiscType string, handle, parent uint32) (netlink.Qdisc, error) {
	qds, err := netlink.QdiscList(link)
	if err != nil {
		return nil, err
	}
	for _, q := range qds {
		if q.Attrs().Handle == handle {
			//Debug.Printf("Found existing ingress qdisc %x\n", q.Attrs().Handle)
			return q, nil
		}
	}
	qdisc := &netlink.GenericQdisc{
		QdiscAttrs: netlink.QdiscAttrs{
			LinkIndex: link.Attrs().Index,
			Handle:    handle,
			Parent:    parent,
		},
		QdiscType: qdiscType,
	}
	if err := netlink.QdiscAdd(qdisc); err != nil {
		return nil, fmt.Errorf("failed ensuring qdisc: %v", err)
	}
	return qdisc, nil
}