sing-box/experimental/clashapi/trafficontrol/tracker.go

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package trafficontrol
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import (
"net"
"net/netip"
"time"
"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/atomic"
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"github.com/sagernet/sing/common/bufio"
"github.com/sagernet/sing/common/json"
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N "github.com/sagernet/sing/common/network"
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"github.com/gofrs/uuid/v5"
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)
type Metadata struct {
NetWork string `json:"network"`
Type string `json:"type"`
SrcIP netip.Addr `json:"sourceIP"`
DstIP netip.Addr `json:"destinationIP"`
SrcPort string `json:"sourcePort"`
DstPort string `json:"destinationPort"`
Host string `json:"host"`
DNSMode string `json:"dnsMode"`
ProcessPath string `json:"processPath"`
}
type tracker interface {
ID() string
Close() error
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Leave()
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}
type trackerInfo struct {
UUID uuid.UUID `json:"id"`
Metadata Metadata `json:"metadata"`
UploadTotal *atomic.Int64 `json:"upload"`
DownloadTotal *atomic.Int64 `json:"download"`
Start time.Time `json:"start"`
Chain []string `json:"chains"`
Rule string `json:"rule"`
RulePayload string `json:"rulePayload"`
}
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func (t trackerInfo) MarshalJSON() ([]byte, error) {
return json.Marshal(map[string]any{
"id": t.UUID.String(),
"metadata": t.Metadata,
"upload": t.UploadTotal.Load(),
"download": t.DownloadTotal.Load(),
"start": t.Start,
"chains": t.Chain,
"rule": t.Rule,
"rulePayload": t.RulePayload,
})
}
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type tcpTracker struct {
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N.ExtendedConn `json:"-"`
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*trackerInfo
manager *Manager
}
func (tt *tcpTracker) ID() string {
return tt.UUID.String()
}
func (tt *tcpTracker) Close() error {
tt.manager.Leave(tt)
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return tt.ExtendedConn.Close()
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}
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func (tt *tcpTracker) Leave() {
tt.manager.Leave(tt)
}
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func (tt *tcpTracker) Upstream() any {
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return tt.ExtendedConn
}
func (tt *tcpTracker) ReaderReplaceable() bool {
return true
}
func (tt *tcpTracker) WriterReplaceable() bool {
return true
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}
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func NewTCPTracker(conn net.Conn, manager *Manager, metadata Metadata, router adapter.Router, rule adapter.Rule) *tcpTracker {
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uuid, _ := uuid.NewV4()
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var chain []string
var next string
if rule == nil {
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if defaultOutbound, err := router.DefaultOutbound(N.NetworkTCP); err == nil {
next = defaultOutbound.Tag()
}
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} else {
next = rule.Outbound()
}
for {
chain = append(chain, next)
detour, loaded := router.Outbound(next)
if !loaded {
break
}
group, isGroup := detour.(adapter.OutboundGroup)
if !isGroup {
break
}
next = group.Now()
}
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upload := new(atomic.Int64)
download := new(atomic.Int64)
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t := &tcpTracker{
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ExtendedConn: bufio.NewCounterConn(conn, []N.CountFunc{func(n int64) {
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upload.Add(n)
manager.PushUploaded(n)
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}}, []N.CountFunc{func(n int64) {
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download.Add(n)
manager.PushDownloaded(n)
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}}),
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manager: manager,
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trackerInfo: &trackerInfo{
UUID: uuid,
Start: time.Now(),
Metadata: metadata,
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Chain: common.Reverse(chain),
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Rule: "",
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UploadTotal: upload,
DownloadTotal: download,
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},
}
if rule != nil {
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t.trackerInfo.Rule = rule.String() + " => " + rule.Outbound()
} else {
t.trackerInfo.Rule = "final"
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}
manager.Join(t)
return t
}
type udpTracker struct {
N.PacketConn `json:"-"`
*trackerInfo
manager *Manager
}
func (ut *udpTracker) ID() string {
return ut.UUID.String()
}
func (ut *udpTracker) Close() error {
ut.manager.Leave(ut)
return ut.PacketConn.Close()
}
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func (ut *udpTracker) Leave() {
ut.manager.Leave(ut)
}
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func (ut *udpTracker) Upstream() any {
return ut.PacketConn
}
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func (ut *udpTracker) ReaderReplaceable() bool {
return true
}
func (ut *udpTracker) WriterReplaceable() bool {
return true
}
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func NewUDPTracker(conn N.PacketConn, manager *Manager, metadata Metadata, router adapter.Router, rule adapter.Rule) *udpTracker {
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uuid, _ := uuid.NewV4()
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var chain []string
var next string
if rule == nil {
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if defaultOutbound, err := router.DefaultOutbound(N.NetworkUDP); err == nil {
next = defaultOutbound.Tag()
}
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} else {
next = rule.Outbound()
}
for {
chain = append(chain, next)
detour, loaded := router.Outbound(next)
if !loaded {
break
}
group, isGroup := detour.(adapter.OutboundGroup)
if !isGroup {
break
}
next = group.Now()
}
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upload := new(atomic.Int64)
download := new(atomic.Int64)
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ut := &udpTracker{
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PacketConn: bufio.NewCounterPacketConn(conn, []N.CountFunc{func(n int64) {
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upload.Add(n)
manager.PushUploaded(n)
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}}, []N.CountFunc{func(n int64) {
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download.Add(n)
manager.PushDownloaded(n)
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}}),
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manager: manager,
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trackerInfo: &trackerInfo{
UUID: uuid,
Start: time.Now(),
Metadata: metadata,
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Chain: common.Reverse(chain),
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Rule: "",
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UploadTotal: upload,
DownloadTotal: download,
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},
}
if rule != nil {
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ut.trackerInfo.Rule = rule.String() + " => " + rule.Outbound()
} else {
ut.trackerInfo.Rule = "final"
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}
manager.Join(ut)
return ut
}