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
}
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
}