vendor: add CNI invoke, ip, ipam, and hwaddr packages

vendor/github.com/vishvananda/netlink/qdisc.go

@@ -0,0 +1,232 @@
+package netlink
+
+import (
+	"fmt"
+	"math"
+)
+
+const (
+	HANDLE_NONE      = 0
+	HANDLE_INGRESS   = 0xFFFFFFF1
+	HANDLE_CLSACT    = HANDLE_INGRESS
+	HANDLE_ROOT      = 0xFFFFFFFF
+	PRIORITY_MAP_LEN = 16
+)
+const (
+	HANDLE_MIN_INGRESS = 0xFFFFFFF2
+	HANDLE_MIN_EGRESS  = 0xFFFFFFF3
+)
+
+type Qdisc interface {
+	Attrs() *QdiscAttrs
+	Type() string
+}
+
+// QdiscAttrs represents a netlink qdisc. A qdisc is associated with a link,
+// has a handle, a parent and a refcnt. The root qdisc of a device should
+// have parent == HANDLE_ROOT.
+type QdiscAttrs struct {
+	LinkIndex int
+	Handle    uint32
+	Parent    uint32
+	Refcnt    uint32 // read only
+}
+
+func (q QdiscAttrs) String() string {
+	return fmt.Sprintf("{LinkIndex: %d, Handle: %s, Parent: %s, Refcnt: %d}", q.LinkIndex, HandleStr(q.Handle), HandleStr(q.Parent), q.Refcnt)
+}
+
+func MakeHandle(major, minor uint16) uint32 {
+	return (uint32(major) << 16) | uint32(minor)
+}
+
+func MajorMinor(handle uint32) (uint16, uint16) {
+	return uint16((handle & 0xFFFF0000) >> 16), uint16(handle & 0x0000FFFFF)
+}
+
+func HandleStr(handle uint32) string {
+	switch handle {
+	case HANDLE_NONE:
+		return "none"
+	case HANDLE_INGRESS:
+		return "ingress"
+	case HANDLE_ROOT:
+		return "root"
+	default:
+		major, minor := MajorMinor(handle)
+		return fmt.Sprintf("%x:%x", major, minor)
+	}
+}
+
+func Percentage2u32(percentage float32) uint32 {
+	// FIXME this is most likely not the best way to convert from % to uint32
+	if percentage == 100 {
+		return math.MaxUint32
+	}
+	return uint32(math.MaxUint32 * (percentage / 100))
+}
+
+// PfifoFast is the default qdisc created by the kernel if one has not
+// been defined for the interface
+type PfifoFast struct {
+	QdiscAttrs
+	Bands       uint8
+	PriorityMap [PRIORITY_MAP_LEN]uint8
+}
+
+func (qdisc *PfifoFast) Attrs() *QdiscAttrs {
+	return &qdisc.QdiscAttrs
+}
+
+func (qdisc *PfifoFast) Type() string {
+	return "pfifo_fast"
+}
+
+// Prio is a basic qdisc that works just like PfifoFast
+type Prio struct {
+	QdiscAttrs
+	Bands       uint8
+	PriorityMap [PRIORITY_MAP_LEN]uint8
+}
+
+func NewPrio(attrs QdiscAttrs) *Prio {
+	return &Prio{
+		QdiscAttrs:  attrs,
+		Bands:       3,
+		PriorityMap: [PRIORITY_MAP_LEN]uint8{1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1},
+	}
+}
+
+func (qdisc *Prio) Attrs() *QdiscAttrs {
+	return &qdisc.QdiscAttrs
+}
+
+func (qdisc *Prio) Type() string {
+	return "prio"
+}
+
+// Htb is a classful qdisc that rate limits based on tokens
+type Htb struct {
+	QdiscAttrs
+	Version      uint32
+	Rate2Quantum uint32
+	Defcls       uint32
+	Debug        uint32
+	DirectPkts   uint32
+}
+
+func NewHtb(attrs QdiscAttrs) *Htb {
+	return &Htb{
+		QdiscAttrs:   attrs,
+		Version:      3,
+		Defcls:       0,
+		Rate2Quantum: 10,
+		Debug:        0,
+		DirectPkts:   0,
+	}
+}
+
+func (qdisc *Htb) Attrs() *QdiscAttrs {
+	return &qdisc.QdiscAttrs
+}
+
+func (qdisc *Htb) Type() string {
+	return "htb"
+}
+
+// Netem is a classless qdisc that rate limits based on tokens
+
+type NetemQdiscAttrs struct {
+	Latency       uint32  // in us
+	DelayCorr     float32 // in %
+	Limit         uint32
+	Loss          float32 // in %
+	LossCorr      float32 // in %
+	Gap           uint32
+	Duplicate     float32 // in %
+	DuplicateCorr float32 // in %
+	Jitter        uint32  // in us
+	ReorderProb   float32 // in %
+	ReorderCorr   float32 // in %
+	CorruptProb   float32 // in %
+	CorruptCorr   float32 // in %
+}
+
+func (q NetemQdiscAttrs) String() string {
+	return fmt.Sprintf(
+		"{Latency: %d, Limit: %d, Loss: %f, Gap: %d, Duplicate: %f, Jitter: %d}",
+		q.Latency, q.Limit, q.Loss, q.Gap, q.Duplicate, q.Jitter,
+	)
+}
+
+type Netem struct {
+	QdiscAttrs
+	Latency       uint32
+	DelayCorr     uint32
+	Limit         uint32
+	Loss          uint32
+	LossCorr      uint32
+	Gap           uint32
+	Duplicate     uint32
+	DuplicateCorr uint32
+	Jitter        uint32
+	ReorderProb   uint32
+	ReorderCorr   uint32
+	CorruptProb   uint32
+	CorruptCorr   uint32
+}
+
+func (qdisc *Netem) Attrs() *QdiscAttrs {
+	return &qdisc.QdiscAttrs
+}
+
+func (qdisc *Netem) Type() string {
+	return "netem"
+}
+
+// Tbf is a classless qdisc that rate limits based on tokens
+type Tbf struct {
+	QdiscAttrs
+	Rate     uint64
+	Limit    uint32
+	Buffer   uint32
+	Peakrate uint64
+	Minburst uint32
+	// TODO: handle other settings
+}
+
+func (qdisc *Tbf) Attrs() *QdiscAttrs {
+	return &qdisc.QdiscAttrs
+}
+
+func (qdisc *Tbf) Type() string {
+	return "tbf"
+}
+
+// Ingress is a qdisc for adding ingress filters
+type Ingress struct {
+	QdiscAttrs
+}
+
+func (qdisc *Ingress) Attrs() *QdiscAttrs {
+	return &qdisc.QdiscAttrs
+}
+
+func (qdisc *Ingress) Type() string {
+	return "ingress"
+}
+
+// GenericQdisc qdiscs represent types that are not currently understood
+// by this netlink library.
+type GenericQdisc struct {
+	QdiscAttrs
+	QdiscType string
+}
+
+func (qdisc *GenericQdisc) Attrs() *QdiscAttrs {
+	return &qdisc.QdiscAttrs
+}
+
+func (qdisc *GenericQdisc) Type() string {
+	return qdisc.QdiscType
+}