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group.go
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group.go
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package openflow15
// This file has all group related defs
import (
"encoding/binary"
"errors"
"k8s.io/klog/v2"
"antrea.io/libOpenflow/common"
"antrea.io/libOpenflow/util"
)
const (
OFPG_MAX = 0xffffff00 /* Last usable group number. */
/* Fake groups. */
OFPG_ALL = 0xfffffffc /* Represents all groups for group delete commands. */
OFPG_ANY = 0xffffffff /* Wildcard group used only for flow stats requests. Selects all flows regardless of group (including flows with no group).
*/
)
const (
OFPG_BUCKET_MAX = 0xffffff00 /* Last usable bucket ID. */
OFPG_BUCKET_FIRST = 0xfffffffd /* First bucket ID in the list of action buckets of a group. This is applicable
for OFPGC_INSERT_BUCKET and OFPGC_REMOVE_BUCKET commands. */
OFPG_BUCKET_LAST = 0xfffffffe /* Last bucket ID in the list of action buckets of a group. This is applicable
for OFPGC_INSERT_BUCKET and OFPGC_REMOVE_BUCKET commands. */
OFPG_BUCKET_ALL = 0xffffffff /* All action buckets in a group. This is applicable for only OFPGC_REMOVE_BUCKET command. */
)
const (
OFPGC_ADD = 0 /* New group. */
OFPGC_MODIFY = 1 /* Modify all matching groups. */
OFPGC_DELETE = 2 /* Delete all matching groups. */
OFPGC_INSERT_BUCKET = 3 /* Insert action buckets to the already available
list of action buckets in a matching group */
/* OFPGC_??? = 4, */ /* Reserved for future use. */
OFPGC_REMOVE_BUCKET = 5 /* Remove all action buckets or any specific action
bucket from matching group */
)
const (
GT_ALL = 0 /* All (multicast/broadcast) group. */
GT_SELECT = 1 /* Select group. */
GT_INDIRECT = 2 /* Indirect group. */
GT_FF = 3 /* Fast failover group. */
)
// GroupMod message
type GroupMod struct {
common.Header
Command uint16 /* One of OFPGC_*. */
Type uint8 /* One of OFPGT_*. */
pad uint8 /* Pad to 64 bits. */
GroupId uint32 /* Group identifier. */
BucketArrayLen uint16 /* Length of action buckets data. */
Pad uint16
CommandBucketId uint32 /* Bucket Id used as part of
OFPGC_INSERT_BUCKET and OFPGC_REMOVE_BUCKET commands execution.*/
Buckets []Bucket /* List of buckets */
Properties []util.Message
}
// Create a new group mod message
func NewGroupMod() *GroupMod {
g := new(GroupMod)
g.Header = NewOfp15Header()
g.Header.Type = Type_GroupMod
g.Command = OFPGC_ADD
g.Type = GT_ALL
g.GroupId = 0
g.Buckets = make([]Bucket, 0)
return g
}
// Add a bucket to group mod
func (g *GroupMod) AddBucket(bkt Bucket) {
g.Buckets = append(g.Buckets, bkt)
g.BucketArrayLen += bkt.Len()
}
func (g *GroupMod) Len() (n uint16) {
n = g.Header.Len()
n += 16
for _, b := range g.Buckets {
n += b.Len()
}
for _, p := range g.Properties {
n += p.Len()
}
return
}
func (g *GroupMod) MarshalBinary() (data []byte, err error) {
g.Header.Length = g.Len()
data, err = g.Header.MarshalBinary()
if err != nil {
return
}
bytes := make([]byte, 16)
var n uint16
binary.BigEndian.PutUint16(bytes[n:], g.Command)
n += 2
bytes[n] = g.Type
n += 1
n++ // Pad
binary.BigEndian.PutUint32(bytes[n:], g.GroupId)
n += 4
binary.BigEndian.PutUint16(bytes[n:], g.BucketArrayLen)
n += 2
n += 2 // Pad
if g.Command == OFPGC_ADD || g.Command == OFPGC_MODIFY || g.Command == OFPGC_DELETE {
g.CommandBucketId = 0xffffffff
}
binary.BigEndian.PutUint32(bytes[n:], g.CommandBucketId)
data = append(data, bytes...)
for _, bkt := range g.Buckets {
bytes, err = bkt.MarshalBinary()
if err != nil {
return
}
data = append(data, bytes...)
g.BucketArrayLen += bkt.Len()
}
for _, p := range g.Properties {
bytes, err = p.MarshalBinary()
if err != nil {
return
}
data = append(data, bytes...)
}
klog.V(7).InfoS("GroupMod MarshalBinary succeeded", "dataLength", len(data), "data", data)
return
}
func (g *GroupMod) UnmarshalBinary(data []byte) (err error) {
var n uint16
err = g.Header.UnmarshalBinary(data[n:])
if err != nil {
return
}
n += g.Header.Len()
g.Command = binary.BigEndian.Uint16(data[n:])
n += 2
g.Type = data[n]
n += 1
g.pad = data[n]
n += 1
g.GroupId = binary.BigEndian.Uint32(data[n:])
n += 4
g.BucketArrayLen = binary.BigEndian.Uint16(data[n:])
n += 2
n += 2 // Pad
g.CommandBucketId = binary.BigEndian.Uint32(data[n:])
n += 4
for n < g.Header.Length {
bkt := new(Bucket)
err = bkt.UnmarshalBinary(data[n:])
if err != nil {
klog.ErrorS(err, "Failed to unmarshal GroupMod's Bucket", "data", data[n:])
return
}
g.Buckets = append(g.Buckets, *bkt)
n += bkt.Len()
}
for n < g.Header.Length {
var p util.Message
switch binary.BigEndian.Uint16(data[n:]) {
case GPT_EXPERIMENTER:
p = new(PropExperimenter)
default:
err = errors.New("An unknown property type was received")
return
}
err = p.UnmarshalBinary(data[n:])
if err != nil {
klog.ErrorS(err, "Failed to unmarshal GroupMod's Properties", "data", data[n:])
return err
}
n += p.Len()
g.Properties = append(g.Properties, p)
}
return nil
}
// ofp_group_prop_type
const (
GPT_EXPERIMENTER = 0xFFFF /* Experimenter defined. */
)
// ofp_bucket
type Bucket struct {
Length uint16 /* Length the bucket in bytes, including this header and any padding to make it 64-bit aligned. */
ActionArrayLen uint16 /* Length of all actions in bytes. */
BucketId uint32 /* Bucket Id used to identify bucket*/
Actions []Action /* zero or more actions */
Properties []util.Message
}
// ofp_group_bucket_prop_type
const (
GBPT_WEIGHT = 0 /* Select groups only. */
GBPT_WATCH_PORT = 1 /* Fast failover groups only. */
GBPT_WATCH_GROUP = 2 /* Fast failover groups only. */
GBPT_EXPERIMENTER = 0xFFFF /* Experimenter defined. */
)
// Create a new Bucket
func NewBucket(id uint32) *Bucket {
bkt := new(Bucket)
bkt.Actions = make([]Action, 0)
bkt.Length = bkt.Len()
bkt.BucketId = id
return bkt
}
// Add an action to the bucket
func (b *Bucket) AddAction(act Action) {
b.Actions = append(b.Actions, act)
b.ActionArrayLen += act.Len()
}
func (b *Bucket) AddProperty(prop util.Message) {
b.Properties = append(b.Properties, prop)
}
func (b *Bucket) Len() (n uint16) {
n = 8
for _, a := range b.Actions {
n += a.Len()
}
for _, p := range b.Properties {
n += p.Len()
}
// Round it to closest multiple of 8
n = ((n + 7) / 8) * 8
return
}
func (b *Bucket) MarshalBinary() (data []byte, err error) {
bytes := make([]byte, 8)
n := 0
b.Length = b.Len() // Calculate length first
binary.BigEndian.PutUint16(bytes[n:], b.Length)
n += 2
binary.BigEndian.PutUint16(bytes[n:], b.ActionArrayLen)
n += 2
binary.BigEndian.PutUint32(bytes[n:], b.BucketId)
n += 4
data = append(data, bytes...)
for _, a := range b.Actions {
bytes, err = a.MarshalBinary()
if err != nil {
return
}
data = append(data, bytes...)
b.ActionArrayLen += a.Len()
}
for _, p := range b.Properties {
bytes, err = p.MarshalBinary()
if err != nil {
return
}
data = append(data, bytes...)
}
return
}
func (b *Bucket) UnmarshalBinary(data []byte) (err error) {
var n uint16
b.Length = binary.BigEndian.Uint16(data[n:])
n += 2
b.ActionArrayLen = binary.BigEndian.Uint16(data[n:])
n += 2
b.BucketId = binary.BigEndian.Uint32(data[n:])
n += 4
for n < 8+b.ActionArrayLen {
a, err := DecodeAction(data[n:])
if err != nil {
klog.ErrorS(err, "Failed to decode Bucket action", "data", data[n:])
return err
}
b.Actions = append(b.Actions, a)
n += a.Len()
}
for n < b.Length {
var p util.Message
switch binary.BigEndian.Uint16(data[n:]) {
case GBPT_WEIGHT:
p = new(GroupBucketPropWeight)
case GBPT_WATCH_PORT:
p = new(GroupBucketPropWatchPort)
case GBPT_WATCH_GROUP:
p = new(GroupBucketPropWatchGroup)
case GBPT_EXPERIMENTER:
p = new(PropExperimenter)
default:
err = errors.New("An unknown property type was received")
return
}
err = p.UnmarshalBinary(data[n:])
if err != nil {
klog.ErrorS(err, "Failed to decode Bucket property", "data", data[n:])
return err
}
n += p.Len()
b.Properties = append(b.Properties, p)
}
return nil
}
// ofp_group_bucket_prop_weight
type GroupBucketPropWeight struct {
Header PropHeader
Weight uint16
Pad uint16
}
func NewGroupBucketPropWeight(weight uint16) *GroupBucketPropWeight {
p := new(GroupBucketPropWeight)
p.Header.Type = GBPT_WEIGHT
p.Weight = weight
return p
}
func (prop *GroupBucketPropWeight) Len() uint16 {
n := prop.Header.Len()
n += 4
return n
}
func (prop *GroupBucketPropWeight) MarshalBinary() (data []byte, err error) {
prop.Header.Length = prop.Len()
data, err = prop.Header.MarshalBinary()
if err != nil {
return
}
bytes := make([]byte, 4)
binary.BigEndian.PutUint16(bytes[0:], prop.Weight)
data = append(data, bytes...)
return
}
func (prop *GroupBucketPropWeight) UnmarshalBinary(data []byte) (err error) {
var n uint16
err = prop.Header.UnmarshalBinary(data[n:])
if err != nil {
return
}
n = prop.Header.Len()
prop.Weight = binary.BigEndian.Uint16(data[n:])
return
}
// ofp_group_bucket_prop_watch
type GroupBucketPropWatch struct {
Header PropHeader
Watch uint32
}
type GroupBucketPropWatchPort = GroupBucketPropWatch //nolint
type GroupBucketPropWatchGroup = GroupBucketPropWatch //nolint
func NewGroupBucketPropWatchPort(watch uint32) *GroupBucketPropWatchPort {
p := new(GroupBucketPropWatchPort)
p.Header.Type = GBPT_WATCH_PORT
p.Watch = watch
return p
}
func NewGroupBucketPropWatchGroup(watch uint32) *GroupBucketPropWatchGroup {
p := new(GroupBucketPropWatchGroup)
p.Header.Type = GBPT_WATCH_GROUP
p.Watch = watch
return p
}
func (prop *GroupBucketPropWatch) Len() uint16 {
n := prop.Header.Len()
n += 4
return n
}
func (prop *GroupBucketPropWatch) MarshalBinary() (data []byte, err error) {
prop.Header.Length = prop.Len()
data, err = prop.Header.MarshalBinary()
if err != nil {
return
}
bytes := make([]byte, 4)
binary.BigEndian.PutUint32(bytes[0:], prop.Watch)
data = append(data, bytes...)
return
}
func (prop *GroupBucketPropWatch) UnmarshalBinary(data []byte) (err error) {
var n uint16
err = prop.Header.UnmarshalBinary(data[n:])
if err != nil {
return
}
n = prop.Header.Len()
prop.Watch = binary.BigEndian.Uint32(data[n:])
return
}