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options.go
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options.go
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/*
Copyright NetFoundry Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package xgress
import (
"encoding/json"
"github.com/pkg/errors"
"time"
)
// Options contains common Xgress configuration options
type Options struct {
Mtu int32
RandomDrops bool
Drop1InN int32
TxQueueSize int32
TxPortalStartSize uint32
TxPortalMaxSize uint32
TxPortalMinSize uint32
TxPortalIncreaseThresh uint32
TxPortalIncreaseScale float64
TxPortalRetxThresh uint32
TxPortalRetxScale float64
TxPortalDupAckThresh uint32
TxPortalDupAckScale float64
RxBufferSize uint32
RetxStartMs uint32
RetxScale float64
RetxAddMs uint32
MaxCloseWait time.Duration
GetCircuitTimeout time.Duration
CircuitStartTimeout time.Duration
ConnectTimeout time.Duration
}
func LoadOptions(data OptionsData) (*Options, error) {
options := DefaultOptions()
if value, found := data["options"]; found {
data = value.(map[interface{}]interface{})
if value, found := data["mtu"]; found {
options.Mtu = int32(value.(int))
}
if value, found := data["randomDrops"]; found {
options.RandomDrops = value.(bool)
}
if value, found := data["drop1InN"]; found {
options.Drop1InN = int32(value.(int))
}
if value, found := data["txQueueSize"]; found {
options.TxQueueSize = int32(value.(int))
}
if value, found := data["txPortalStartSize"]; found {
options.TxPortalStartSize = uint32(value.(int))
}
if value, found := data["txPortalMinSize"]; found {
options.TxPortalMinSize = uint32(value.(int))
}
if value, found := data["txPortalMaxSize"]; found {
options.TxPortalMaxSize = uint32(value.(int))
}
if value, found := data["txPortalIncreaseThresh"]; found {
options.TxPortalIncreaseThresh = uint32(value.(int))
}
if value, found := data["txPortalIncreaseScale"]; found {
options.TxPortalIncreaseScale = value.(float64)
}
if value, found := data["txPortalRetxThresh"]; found {
options.TxPortalRetxThresh = uint32(value.(int))
}
if value, found := data["txPortalRetxScale"]; found {
options.TxPortalRetxScale = value.(float64)
}
if value, found := data["txPortalDupAckThresh"]; found {
options.TxPortalDupAckThresh = uint32(value.(int))
}
if value, found := data["txPortalDupAckScale"]; found {
options.TxPortalDupAckScale = value.(float64)
}
if value, found := data["rxBufferSize"]; found {
options.RxBufferSize = uint32(value.(int))
}
if value, found := data["retxStartMs"]; found {
options.RetxStartMs = uint32(value.(int))
}
if value, found := data["retxScale"]; found {
options.RetxScale = value.(float64)
}
if value, found := data["retxAddMs"]; found {
options.RetxAddMs = uint32(value.(int))
}
if value, found := data["maxCloseWaitMs"]; found {
options.MaxCloseWait = time.Duration(value.(int)) * time.Millisecond
}
if value, found := data["getCircuitTimeout"]; found {
getCircuitTimeout, err := time.ParseDuration(value.(string))
if err != nil {
return nil, errors.Wrap(err, "invalid 'getCircuitTimeout' value")
}
options.GetCircuitTimeout = getCircuitTimeout
}
if value, found := data["circuitStartTimeout"]; found {
circuitStartTimeout, err := time.ParseDuration(value.(string))
if err != nil {
return nil, errors.Wrap(err, "invalid 'circuitStartTimeout' value")
}
options.CircuitStartTimeout = circuitStartTimeout
}
if value, found := data["connectTimeout"]; found {
connectTimeout, err := time.ParseDuration(value.(string))
if err != nil {
return nil, errors.Wrap(err, "invalid 'connectTimeout' value")
}
options.ConnectTimeout = connectTimeout
}
}
return options, nil
}
func DefaultOptions() *Options {
return &Options{
Mtu: 64 * 1024,
RandomDrops: false,
Drop1InN: 100,
TxQueueSize: 1,
TxPortalStartSize: 16 * 1024,
TxPortalMinSize: 16 * 1024,
TxPortalMaxSize: 4 * 1024 * 1024,
TxPortalIncreaseThresh: 224,
TxPortalIncreaseScale: 1.0,
TxPortalRetxThresh: 64,
TxPortalRetxScale: 0.75,
TxPortalDupAckThresh: 64,
TxPortalDupAckScale: 0.9,
RxBufferSize: 4 * 1024 * 1024,
RetxStartMs: 200,
RetxScale: 1.5,
RetxAddMs: 0,
MaxCloseWait: 30 * time.Second,
GetCircuitTimeout: 30 * time.Second,
CircuitStartTimeout: 3 * time.Minute,
ConnectTimeout: 0, // operating system default
}
}
func (options Options) String() string {
data, err := json.Marshal(options)
if err != nil {
return err.Error()
}
return string(data)
}