mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-11-22 20:59:19 +02:00
52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package router
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/xtls/xray-core/common/dice"
|
|
"github.com/xtls/xray-core/features/extension"
|
|
"github.com/xtls/xray-core/features/outbound"
|
|
)
|
|
|
|
type BalancingStrategy interface {
|
|
PickOutbound([]string) string
|
|
}
|
|
|
|
type RandomStrategy struct{}
|
|
|
|
func (s *RandomStrategy) PickOutbound(tags []string) string {
|
|
n := len(tags)
|
|
if n == 0 {
|
|
panic("0 tags")
|
|
}
|
|
|
|
return tags[dice.Roll(n)]
|
|
}
|
|
|
|
type Balancer struct {
|
|
selectors []string
|
|
strategy BalancingStrategy
|
|
ohm outbound.Manager
|
|
}
|
|
|
|
func (b *Balancer) PickOutbound() (string, error) {
|
|
hs, ok := b.ohm.(outbound.HandlerSelector)
|
|
if !ok {
|
|
return "", newError("outbound.Manager is not a HandlerSelector")
|
|
}
|
|
tags := hs.Select(b.selectors)
|
|
if len(tags) == 0 {
|
|
return "", newError("no available outbounds selected")
|
|
}
|
|
tag := b.strategy.PickOutbound(tags)
|
|
if tag == "" {
|
|
return "", newError("balancing strategy returns empty tag")
|
|
}
|
|
return tag, nil
|
|
}
|
|
func (b *Balancer) InjectContext(ctx context.Context) {
|
|
if contextReceiver, ok := b.strategy.(extension.ContextReceiver); ok {
|
|
contextReceiver.InjectContext(ctx)
|
|
}
|
|
}
|