clash/adapter/outboundgroup/fallback.go

104 lines
2.3 KiB
Go

package outboundgroup
import (
"context"
"encoding/json"
"github.com/Dreamacro/clash/adapter/outbound"
"github.com/Dreamacro/clash/component/dialer"
C "github.com/Dreamacro/clash/constant"
"github.com/Dreamacro/clash/constant/provider"
)
type Fallback struct {
*GroupBase
disableUDP bool
}
func (f *Fallback) Now() string {
proxy := f.findAliveProxy(false)
return proxy.Name()
}
// DialContext implements C.ProxyAdapter
func (f *Fallback) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
proxy := f.findAliveProxy(true)
c, err := proxy.DialContext(ctx, metadata, f.Base.DialOptions(opts...)...)
if err == nil {
c.AppendToChains(f)
f.onDialSuccess()
} else {
f.onDialFailed()
}
return c, err
}
// ListenPacketContext implements C.ProxyAdapter
func (f *Fallback) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
proxy := f.findAliveProxy(true)
pc, err := proxy.ListenPacketContext(ctx, metadata, f.Base.DialOptions(opts...)...)
if err == nil {
pc.AppendToChains(f)
f.onDialSuccess()
} else {
f.onDialFailed()
}
return pc, err
}
// SupportUDP implements C.ProxyAdapter
func (f *Fallback) SupportUDP() bool {
if f.disableUDP {
return false
}
proxy := f.findAliveProxy(false)
return proxy.SupportUDP()
}
// MarshalJSON implements C.ProxyAdapter
func (f *Fallback) MarshalJSON() ([]byte, error) {
all := []string{}
for _, proxy := range f.GetProxies(false) {
all = append(all, proxy.Name())
}
return json.Marshal(map[string]any{
"type": f.Type().String(),
"now": f.Now(),
"all": all,
})
}
// Unwrap implements C.ProxyAdapter
func (f *Fallback) Unwrap(metadata *C.Metadata) C.Proxy {
proxy := f.findAliveProxy(true)
return proxy
}
func (f *Fallback) findAliveProxy(touch bool) C.Proxy {
proxies := f.GetProxies(touch)
for _, proxy := range proxies {
if proxy.Alive() {
return proxy
}
}
return proxies[0]
}
func NewFallback(option *GroupCommonOption, providers []provider.ProxyProvider) *Fallback {
return &Fallback{
GroupBase: NewGroupBase(GroupBaseOption{
outbound.BaseOption{
Name: option.Name,
Type: C.Fallback,
Interface: option.Interface,
RoutingMark: option.RoutingMark,
},
option.Filter,
providers,
}),
disableUDP: option.DisableUDP,
}
}