func qdiscPayload(req *nl.NetlinkRequest, qdisc Qdisc) error {
req.AddData(nl.NewRtAttr(nl.TCA_KIND, nl.ZeroTerminated(qdisc.Type())))
options := nl.NewRtAttr(nl.TCA_OPTIONS, nil)
if prio, ok := qdisc.(*Prio); ok {
tcmap := nl.TcPrioMap{
Bands: int32(prio.Bands),
Priomap: prio.PriorityMap,
}
options = nl.NewRtAttr(nl.TCA_OPTIONS, tcmap.Serialize())
} else if tbf, ok := qdisc.(*Tbf); ok {
opt := nl.TcTbfQopt{}
// TODO: handle rate > uint32
opt.Rate.Rate = uint32(tbf.Rate)
opt.Limit = tbf.Limit
opt.Buffer = tbf.Buffer
nl.NewRtAttrChild(options, nl.TCA_TBF_PARMS, opt.Serialize())
} else if htb, ok := qdisc.(*Htb); ok {
opt := nl.TcHtbGlob{}
opt.Version = htb.Version
opt.Rate2Quantum = htb.Rate2Quantum
opt.Defcls = htb.Defcls
// TODO: Handle Debug properly. For now default to 0
opt.Debug = htb.Debug
opt.DirectPkts = htb.DirectPkts
nl.NewRtAttrChild(options, nl.TCA_HTB_INIT, opt.Serialize())
// nl.NewRtAttrChild(options, nl.TCA_HTB_DIRECT_QLEN, opt.Serialize())
} else if netem, ok := qdisc.(*Netem); ok {
opt := nl.TcNetemQopt{}
opt.Latency = netem.Latency
opt.Limit = netem.Limit
opt.Loss = netem.Loss
opt.Gap = netem.Gap
opt.Duplicate = netem.Duplicate
opt.Jitter = netem.Jitter
options = nl.NewRtAttr(nl.TCA_OPTIONS, opt.Serialize())
// Correlation
corr := nl.TcNetemCorr{}
corr.DelayCorr = netem.DelayCorr
corr.LossCorr = netem.LossCorr
corr.DupCorr = netem.DuplicateCorr
if corr.DelayCorr > 0 || corr.LossCorr > 0 || corr.DupCorr > 0 {
nl.NewRtAttrChild(options, nl.TCA_NETEM_CORR, corr.Serialize())
}
// Corruption
corruption := nl.TcNetemCorrupt{}
corruption.Probability = netem.CorruptProb
corruption.Correlation = netem.CorruptCorr
if corruption.Probability > 0 {
nl.NewRtAttrChild(options, nl.TCA_NETEM_CORRUPT, corruption.Serialize())
}
// Reorder
reorder := nl.TcNetemReorder{}
reorder.Probability = netem.ReorderProb
reorder.Correlation = netem.ReorderCorr
if reorder.Probability > 0 {
nl.NewRtAttrChild(options, nl.TCA_NETEM_REORDER, reorder.Serialize())
}
} else if _, ok := qdisc.(*Ingress); ok {
// ingress filters must use the proper handle
if qdisc.Attrs().Parent != HANDLE_INGRESS {
return fmt.Errorf("Ingress filters must set Parent to HANDLE_INGRESS")
}
}
req.AddData(options)
return nil
}
// QdiscAdd will add a qdisc to the system.
// Equivalent to: `tc qdisc add $qdisc`
func QdiscAdd(qdisc Qdisc) error {
req := nl.NewNetlinkRequest(syscall.RTM_NEWQDISC, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)
base := qdisc.Attrs()
msg := &nl.TcMsg{
Family: nl.FAMILY_ALL,
Ifindex: int32(base.LinkIndex),
Handle: base.Handle,
Parent: base.Parent,
}
req.AddData(msg)
req.AddData(nl.NewRtAttr(nl.TCA_KIND, nl.ZeroTerminated(qdisc.Type())))
options := nl.NewRtAttr(nl.TCA_OPTIONS, nil)
if prio, ok := qdisc.(*Prio); ok {
tcmap := nl.TcPrioMap{
Bands: int32(prio.Bands),
Priomap: prio.PriorityMap,
}
options = nl.NewRtAttr(nl.TCA_OPTIONS, tcmap.Serialize())
} else if tbf, ok := qdisc.(*Tbf); ok {
opt := nl.TcTbfQopt{}
// TODO: handle rate > uint32
opt.Rate.Rate = uint32(tbf.Rate)
opt.Limit = tbf.Limit
opt.Buffer = tbf.Buffer
nl.NewRtAttrChild(options, nl.TCA_TBF_PARMS, opt.Serialize())
} else if htb, ok := qdisc.(*Htb); ok {
opt := nl.TcHtbGlob{}
opt.Version = htb.Version
opt.Rate2Quantum = htb.Rate2Quantum
opt.Defcls = htb.Defcls
// TODO: Handle Debug properly. For now default to 0
opt.Debug = htb.Debug
opt.DirectPkts = htb.DirectPkts
nl.NewRtAttrChild(options, nl.TCA_HTB_INIT, opt.Serialize())
// nl.NewRtAttrChild(options, nl.TCA_HTB_DIRECT_QLEN, opt.Serialize())
} else if netem, ok := qdisc.(*Netem); ok {
opt := nl.TcNetemQopt{}
opt.Latency = netem.Latency
opt.Limit = netem.Limit
opt.Loss = netem.Loss
opt.Gap = netem.Gap
opt.Duplicate = netem.Duplicate
opt.Jitter = netem.Jitter
options = nl.NewRtAttr(nl.TCA_OPTIONS, opt.Serialize())
// Correlation
corr := nl.TcNetemCorr{}
corr.DelayCorr = netem.DelayCorr
corr.LossCorr = netem.LossCorr
corr.DupCorr = netem.DuplicateCorr
if corr.DelayCorr > 0 || corr.LossCorr > 0 || corr.DupCorr > 0 {
nl.NewRtAttrChild(options, nl.TCA_NETEM_CORR, corr.Serialize())
}
// Corruption
corruption := nl.TcNetemCorrupt{}
corruption.Probability = netem.CorruptProb
corruption.Correlation = netem.CorruptCorr
if corruption.Probability > 0 {
nl.NewRtAttrChild(options, nl.TCA_NETEM_CORRUPT, corruption.Serialize())
}
// Reorder
reorder := nl.TcNetemReorder{}
reorder.Probability = netem.ReorderProb
reorder.Correlation = netem.ReorderCorr
if reorder.Probability > 0 {
nl.NewRtAttrChild(options, nl.TCA_NETEM_REORDER, reorder.Serialize())
}
} else if _, ok := qdisc.(*Ingress); ok {
// ingress filters must use the proper handle
if msg.Parent != HANDLE_INGRESS {
return fmt.Errorf("Ingress filters must set Parent to HANDLE_INGRESS")
}
}
req.AddData(options)
_, err := req.Execute(syscall.NETLINK_ROUTE, 0)
return err
}