rename vtun to tungo
This commit is contained in:
ginuerzh
@@ -1,6 +1,4 @@
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// Package iobased provides the implementation of io.ReadWriter
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// based data-link layer endpoints.
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package tun
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package tungo
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import (
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"context"
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@@ -0,0 +1,180 @@
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package tungo
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import (
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"context"
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"errors"
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"net"
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"time"
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"github.com/go-gost/core/handler"
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"github.com/go-gost/core/limiter"
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"github.com/go-gost/core/limiter/traffic"
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md "github.com/go-gost/core/metadata"
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"github.com/go-gost/core/observer"
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"github.com/go-gost/core/recorder"
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ctxvalue "github.com/go-gost/x/ctx"
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stats_util "github.com/go-gost/x/internal/util/stats"
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tun_util "github.com/go-gost/x/internal/util/tun"
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cache_limiter "github.com/go-gost/x/limiter/traffic/cache"
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xrecorder "github.com/go-gost/x/recorder"
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"github.com/go-gost/x/registry"
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"github.com/xjasonlyu/tun2socks/v2/core"
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"github.com/xjasonlyu/tun2socks/v2/core/adapter"
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)
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func init() {
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registry.HandlerRegistry().Register("tungo", NewHandler)
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}
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type tungoHandler struct {
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options handler.Options
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md metadata
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stats *stats_util.HandlerStats
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limiter traffic.TrafficLimiter
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cancel context.CancelFunc
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recorder recorder.RecorderObject
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}
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func NewHandler(opts ...handler.Option) handler.Handler {
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options := handler.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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return &tungoHandler{
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options: options,
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}
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}
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func (h *tungoHandler) Init(md md.Metadata) (err error) {
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if err = h.parseMetadata(md); err != nil {
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return
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}
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ctx, cancel := context.WithCancel(context.Background())
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h.cancel = cancel
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if h.options.Observer != nil {
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h.stats = stats_util.NewHandlerStats(h.options.Service, h.md.observerResetTraffic)
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go h.observeStats(ctx)
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}
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if h.options.Limiter != nil {
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h.limiter = cache_limiter.NewCachedTrafficLimiter(h.options.Limiter,
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cache_limiter.RefreshIntervalOption(h.md.limiterRefreshInterval),
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cache_limiter.CleanupIntervalOption(h.md.limiterCleanupInterval),
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cache_limiter.ScopeOption(limiter.ScopeClient),
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)
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}
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for _, ro := range h.options.Recorders {
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if ro.Record == xrecorder.RecorderServiceHandler {
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h.recorder = ro
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break
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}
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}
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return
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}
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func (h *tungoHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
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defer conn.Close()
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log := h.options.Logger
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var config *tun_util.Config
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if v, _ := conn.(md.Metadatable); v != nil {
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config = v.Metadata().Get("config").(*tun_util.Config)
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}
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if config == nil {
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err := errors.New("tun: wrong connection type")
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log.Error(err)
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return err
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}
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start := time.Now()
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log = log.WithFields(map[string]any{
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"remote": conn.RemoteAddr().String(),
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"local": conn.LocalAddr().String(),
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"sid": string(ctxvalue.SidFromContext(ctx)),
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})
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log.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
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defer func() {
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log.WithFields(map[string]any{
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"duration": time.Since(start),
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}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
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}()
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th := &transportHandler{
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tcpQueue: make(chan adapter.TCPConn),
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udpQueue: make(chan adapter.UDPConn),
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udpTimeout: h.md.udpTimeout,
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procCancel: func() { /* nop */ },
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sniffing: h.md.sniffing,
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sniffingTimeout: h.md.sniffingTimeout,
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sniffingResponseTimeout: h.md.sniffingResponseTimeout,
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sniffingFallback: h.md.sniffingFallback,
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recorder: h.recorder,
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stats: h.stats,
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opts: &h.options,
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}
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th.ProcessAsync()
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defer th.Close()
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stack, err := core.CreateStack(&core.Config{
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LinkEndpoint: newEndpoint(conn, config.MTU, log),
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TransportHandler: th,
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})
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if err != nil {
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return err
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}
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defer stack.Close()
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<-ctx.Done()
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return nil
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}
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// Close implements io.Closer interface.
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func (h *tungoHandler) Close() error {
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if h.cancel != nil {
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h.cancel()
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}
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return nil
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}
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func (h *tungoHandler) observeStats(ctx context.Context) {
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if h.options.Observer == nil {
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return
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}
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var events []observer.Event
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ticker := time.NewTicker(h.md.observerPeriod)
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defer ticker.Stop()
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for {
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select {
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case <-ticker.C:
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if len(events) > 0 {
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if err := h.options.Observer.Observe(ctx, events); err == nil {
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events = nil
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}
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break
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}
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evs := h.stats.Events()
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if err := h.options.Observer.Observe(ctx, evs); err != nil {
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events = evs
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}
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case <-ctx.Done():
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return
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}
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}
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}
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@@ -0,0 +1,46 @@
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package tungo
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import (
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"time"
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mdata "github.com/go-gost/core/metadata"
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mdutil "github.com/go-gost/x/metadata/util"
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)
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type metadata struct {
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udpTimeout time.Duration
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sniffing bool
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sniffingTimeout time.Duration
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sniffingResponseTimeout time.Duration
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sniffingFallback bool
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observerPeriod time.Duration
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observerResetTraffic bool
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limiterRefreshInterval time.Duration
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limiterCleanupInterval time.Duration
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}
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func (h *tungoHandler) parseMetadata(md mdata.Metadata) (err error) {
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h.md.udpTimeout = mdutil.GetDuration(md, "udpTimeout")
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h.md.sniffing = mdutil.GetBool(md, "sniffing")
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h.md.sniffingTimeout = mdutil.GetDuration(md, "sniffing.timeout")
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h.md.sniffingResponseTimeout = mdutil.GetDuration(md, "sniffing.responseTimeout")
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h.md.sniffingFallback = mdutil.GetBool(md, "sniffing.fallback")
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h.md.observerPeriod = mdutil.GetDuration(md, "observePeriod", "observer.period", "observer.observePeriod")
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if h.md.observerPeriod == 0 {
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h.md.observerPeriod = 5 * time.Second
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}
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if h.md.observerPeriod < time.Second {
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h.md.observerPeriod = time.Second
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}
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h.md.observerResetTraffic = mdutil.GetBool(md, "observer.resetTraffic")
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h.md.limiterRefreshInterval = mdutil.GetDuration(md, "limiter.refreshInterval")
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h.md.limiterCleanupInterval = mdutil.GetDuration(md, "limiter.cleanupInterval")
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return
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}
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@@ -0,0 +1,377 @@
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package tungo
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import (
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"bufio"
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"bytes"
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"context"
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"crypto/tls"
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"io"
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"math"
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"net"
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"net/netip"
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"strings"
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"sync"
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"time"
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"github.com/go-gost/core/handler"
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"github.com/go-gost/core/observer/stats"
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"github.com/go-gost/core/recorder"
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ctxvalue "github.com/go-gost/x/ctx"
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xnet "github.com/go-gost/x/internal/net"
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"github.com/go-gost/x/internal/util/sniffing"
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stats_util "github.com/go-gost/x/internal/util/stats"
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xstats "github.com/go-gost/x/observer/stats"
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stats_wrapper "github.com/go-gost/x/observer/stats/wrapper"
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xrecorder "github.com/go-gost/x/recorder"
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"github.com/rs/xid"
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"github.com/xjasonlyu/tun2socks/v2/core/adapter"
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)
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const (
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// udpSessionTimeout is the default timeout for UDP sessions.
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udpSessionTimeout = 30 * time.Second
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)
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var _ adapter.TransportHandler = (*transportHandler)(nil)
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type transportHandler struct {
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// Unbuffered TCP/UDP queues.
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tcpQueue chan adapter.TCPConn
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udpQueue chan adapter.UDPConn
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// UDP session timeout.
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udpTimeout time.Duration
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procOnce sync.Once
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procCancel context.CancelFunc
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sniffing bool
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sniffingTimeout time.Duration
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sniffingResponseTimeout time.Duration
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sniffingFallback bool
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stats *stats_util.HandlerStats
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recorder recorder.RecorderObject
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opts *handler.Options
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}
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func (h *transportHandler) HandleTCP(conn adapter.TCPConn) {
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h.tcpQueue <- conn
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}
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func (h *transportHandler) HandleUDP(conn adapter.UDPConn) {
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h.udpQueue <- conn
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}
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func (h *transportHandler) process(ctx context.Context) {
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for {
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select {
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case conn := <-h.tcpQueue:
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go h.handleTCPConn(conn)
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case conn := <-h.udpQueue:
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go h.handleUDPConn(conn)
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case <-ctx.Done():
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return
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}
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}
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}
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// ProcessAsync can be safely called multiple times, but will only be effective once.
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func (h *transportHandler) ProcessAsync() {
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h.procOnce.Do(func() {
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ctx, cancel := context.WithCancel(context.Background())
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h.procCancel = cancel
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go h.process(ctx)
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})
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}
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// Close closes the Tunnel and releases its resources.
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func (h *transportHandler) Close() {
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h.procCancel()
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}
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func (h *transportHandler) handleTCPConn(originConn adapter.TCPConn) {
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defer originConn.Close()
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id := originConn.ID()
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remoteIP, _ := netip.AddrFromSlice(id.RemoteAddress.AsSlice())
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dstIP, _ := netip.AddrFromSlice(id.LocalAddress.AsSlice())
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remoteAddr := netip.AddrPortFrom(remoteIP, id.RemotePort)
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dstAddr := netip.AddrPortFrom(dstIP, id.LocalPort)
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start := time.Now()
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sid := xid.New().String()
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ctx := ctxvalue.ContextWithSid(context.Background(), ctxvalue.Sid(sid))
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ro := &xrecorder.HandlerRecorderObject{
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Service: h.opts.Service,
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Network: "tcp",
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RemoteAddr: remoteAddr.String(),
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Dst: dstAddr.String(),
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ClientIP: remoteAddr.String(),
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Time: start,
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SID: sid,
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}
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if h, _, _ := net.SplitHostPort(ro.ClientIP); h != "" {
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ro.ClientIP = h
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}
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log := h.opts.Logger.WithFields(map[string]any{
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"network": ro.Network,
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"remote": ro.RemoteAddr,
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"dst": ro.Dst,
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"client": ro.ClientIP,
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"sid": ro.SID,
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})
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log.Debugf("%s <> %s", remoteAddr.String(), dstAddr.String())
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var err error
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var conn net.Conn = originConn
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pStats := xstats.Stats{}
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conn = stats_wrapper.WrapConn(conn, &pStats)
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defer func() {
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if err != nil {
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ro.Err = err.Error()
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}
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ro.InputBytes = pStats.Get(stats.KindInputBytes)
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ro.OutputBytes = pStats.Get(stats.KindOutputBytes)
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ro.Duration = time.Since(start)
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log.WithFields(map[string]any{
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"src": ro.Src,
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"duration": time.Since(start),
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"inputBytes": ro.InputBytes,
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"outputBytes": ro.OutputBytes,
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}).Infof("%s >< %s", remoteAddr.String(), dstAddr.String())
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}()
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if pstats := h.stats.Stats(""); pstats != nil {
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pstats.Add(stats.KindTotalConns, 1)
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pstats.Add(stats.KindCurrentConns, 1)
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defer pstats.Add(stats.KindCurrentConns, -1)
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rw := stats_wrapper.WrapReadWriter(conn, pstats)
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conn = xnet.NewReadWriteConn(rw, rw, conn)
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}
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|
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if h.sniffing {
|
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if h.sniffingTimeout > 0 {
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conn.SetReadDeadline(time.Now().Add(h.sniffingTimeout))
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}
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|
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br := bufio.NewReader(conn)
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proto, _ := sniffing.Sniff(ctx, br)
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ro.Proto = proto
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|
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if h.sniffingTimeout > 0 {
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conn.SetReadDeadline(time.Time{})
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}
|
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|
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dial := func(ctx context.Context, network, address string) (net.Conn, error) {
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log.Debugf("dial %s/%s", address, network)
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var cc net.Conn
|
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var err error
|
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if address != "" {
|
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host, _, _ := net.SplitHostPort(address)
|
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if host == "" {
|
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host = address
|
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}
|
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_, port, _ := net.SplitHostPort(dstAddr.String())
|
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address = net.JoinHostPort(strings.Trim(host, "[]"), port)
|
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ro.Host = address
|
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|
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var buf bytes.Buffer
|
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cc, err = h.opts.Router.Dial(ctxvalue.ContextWithBuffer(ctx, &buf), "tcp", address)
|
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ro.Route = buf.String()
|
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if err != nil && !h.sniffingFallback {
|
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return nil, err
|
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}
|
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}
|
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|
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if cc == nil {
|
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var buf bytes.Buffer
|
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cc, err = h.opts.Router.Dial(ctxvalue.ContextWithBuffer(ctx, &buf), "tcp", dstAddr.String())
|
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ro.Route = buf.String()
|
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ro.Host = dstAddr.String()
|
||||
}
|
||||
|
||||
return cc, err
|
||||
}
|
||||
|
||||
dialTLS := func(ctx context.Context, network, address string, cfg *tls.Config) (net.Conn, error) {
|
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return dial(ctx, network, address)
|
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}
|
||||
|
||||
sniffer := &sniffing.Sniffer{
|
||||
Recorder: h.recorder.Recorder,
|
||||
RecorderOptions: h.recorder.Options,
|
||||
ReadTimeout: h.sniffingResponseTimeout,
|
||||
}
|
||||
|
||||
conn = xnet.NewReadWriteConn(br, conn, conn)
|
||||
switch proto {
|
||||
case sniffing.ProtoHTTP:
|
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sniffer.HandleHTTP(ctx, conn,
|
||||
sniffing.WithDial(dial),
|
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sniffing.WithDialTLS(dialTLS),
|
||||
sniffing.WithBypass(h.opts.Bypass),
|
||||
sniffing.WithRecorderObject(ro),
|
||||
sniffing.WithLog(log),
|
||||
)
|
||||
return
|
||||
case sniffing.ProtoTLS:
|
||||
sniffer.HandleTLS(ctx, conn,
|
||||
sniffing.WithDial(dial),
|
||||
sniffing.WithDialTLS(dialTLS),
|
||||
sniffing.WithBypass(h.opts.Bypass),
|
||||
sniffing.WithRecorderObject(ro),
|
||||
sniffing.WithLog(log),
|
||||
)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
if h.opts.Bypass != nil &&
|
||||
h.opts.Bypass.Contains(ctx, "tcp", dstAddr.String()) {
|
||||
log.Debug("bypass: ", dstAddr)
|
||||
return
|
||||
}
|
||||
|
||||
var buf bytes.Buffer
|
||||
cc, err := h.opts.Router.Dial(ctxvalue.ContextWithBuffer(ctx, &buf), "tcp", dstAddr.String())
|
||||
ro.Route = buf.String()
|
||||
if err != nil {
|
||||
log.Errorf("dial %s: %v", dstAddr.String(), err)
|
||||
return
|
||||
}
|
||||
defer cc.Close()
|
||||
|
||||
ro.Src = cc.LocalAddr().String()
|
||||
log = log.WithFields(map[string]any{"src": ro.Src})
|
||||
|
||||
t := time.Now()
|
||||
log.Infof("%s <-> %s", remoteAddr, dstAddr)
|
||||
xnet.Transport(conn, cc)
|
||||
log.WithFields(map[string]any{
|
||||
"duration": time.Since(t),
|
||||
}).Infof("%s >-< %s", remoteAddr, dstAddr)
|
||||
}
|
||||
|
||||
func (h *transportHandler) handleUDPConn(uc adapter.UDPConn) {
|
||||
defer uc.Close()
|
||||
|
||||
id := uc.ID()
|
||||
|
||||
remoteIP, _ := netip.AddrFromSlice(id.RemoteAddress.AsSlice())
|
||||
dstIP, _ := netip.AddrFromSlice(id.LocalAddress.AsSlice())
|
||||
|
||||
remoteAddr := netip.AddrPortFrom(remoteIP, id.RemotePort)
|
||||
dstAddr := netip.AddrPortFrom(dstIP, id.LocalPort)
|
||||
|
||||
start := time.Now()
|
||||
|
||||
sid := xid.New().String()
|
||||
ctx := ctxvalue.ContextWithSid(context.Background(), ctxvalue.Sid(sid))
|
||||
|
||||
ro := &xrecorder.HandlerRecorderObject{
|
||||
Service: h.opts.Service,
|
||||
Network: "udp",
|
||||
RemoteAddr: remoteAddr.String(),
|
||||
Dst: dstAddr.String(),
|
||||
Time: start,
|
||||
SID: sid,
|
||||
}
|
||||
log := h.opts.Logger.WithFields(map[string]any{
|
||||
"network": ro.Network,
|
||||
"remote": ro.RemoteAddr,
|
||||
"dst": ro.Dst,
|
||||
"sid": ro.SID,
|
||||
})
|
||||
|
||||
log.Debugf("%s <> %s", remoteAddr.String(), dstAddr.String())
|
||||
|
||||
var err error
|
||||
var conn net.Conn = uc
|
||||
|
||||
pStats := xstats.Stats{}
|
||||
conn = stats_wrapper.WrapConn(conn, &pStats)
|
||||
|
||||
defer func() {
|
||||
if err != nil {
|
||||
ro.Err = err.Error()
|
||||
}
|
||||
ro.InputBytes = pStats.Get(stats.KindInputBytes)
|
||||
ro.OutputBytes = pStats.Get(stats.KindOutputBytes)
|
||||
ro.Duration = time.Since(start)
|
||||
|
||||
log.WithFields(map[string]any{
|
||||
"src": ro.Src,
|
||||
"duration": time.Since(start),
|
||||
"inputBytes": ro.InputBytes,
|
||||
"outputBytes": ro.OutputBytes,
|
||||
}).Infof("%s >< %s", remoteAddr.String(), dstAddr.String())
|
||||
}()
|
||||
|
||||
cc, err := h.opts.Router.Dial(ctx, "udp", dstAddr.String())
|
||||
if err != nil {
|
||||
log.Errorf("dial %s: %v", dstAddr.String(), err)
|
||||
return
|
||||
}
|
||||
defer cc.Close()
|
||||
|
||||
ro.Src = cc.LocalAddr().String()
|
||||
log = log.WithFields(map[string]any{"src": ro.Src})
|
||||
|
||||
t := time.Now()
|
||||
log.Infof("%s <-> %s", remoteAddr, dstAddr)
|
||||
pipeData(conn, cc, h.udpTimeout)
|
||||
log.WithFields(map[string]any{
|
||||
"duration": time.Since(t),
|
||||
}).Infof("%s >-< %s", remoteAddr, dstAddr)
|
||||
}
|
||||
|
||||
func pipeData(conn1, conn2 net.Conn, timeout time.Duration) {
|
||||
if timeout <= 0 {
|
||||
timeout = udpSessionTimeout
|
||||
}
|
||||
|
||||
wg := sync.WaitGroup{}
|
||||
wg.Add(2)
|
||||
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
copyData(conn1, conn2, timeout)
|
||||
}()
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
copyData(conn2, conn1, timeout)
|
||||
}()
|
||||
wg.Wait()
|
||||
}
|
||||
|
||||
func copyData(dst, src net.Conn, timeout time.Duration) error {
|
||||
buf := make([]byte, math.MaxUint16)
|
||||
|
||||
for {
|
||||
src.SetReadDeadline(time.Now().Add(timeout))
|
||||
n, err := src.Read(buf)
|
||||
if ne, ok := err.(net.Error); ok && ne.Timeout() {
|
||||
return nil /* ignore I/O timeout */
|
||||
} else if err == io.EOF {
|
||||
return nil /* ignore EOF */
|
||||
} else if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if _, err = dst.Write(buf[:n]); err != nil {
|
||||
return err
|
||||
}
|
||||
dst.SetReadDeadline(time.Now().Add(timeout))
|
||||
}
|
||||
}
|
||||
@@ -1,89 +0,0 @@
|
||||
package tun
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"net"
|
||||
"time"
|
||||
|
||||
"github.com/go-gost/core/handler"
|
||||
md "github.com/go-gost/core/metadata"
|
||||
ctxvalue "github.com/go-gost/x/ctx"
|
||||
tun_util "github.com/go-gost/x/internal/util/tun"
|
||||
"github.com/go-gost/x/registry"
|
||||
"github.com/xjasonlyu/tun2socks/v2/core"
|
||||
)
|
||||
|
||||
func init() {
|
||||
registry.HandlerRegistry().Register("vtun", NewHandler)
|
||||
}
|
||||
|
||||
type tunHandler struct {
|
||||
options handler.Options
|
||||
}
|
||||
|
||||
func NewHandler(opts ...handler.Option) handler.Handler {
|
||||
options := handler.Options{}
|
||||
for _, opt := range opts {
|
||||
opt(&options)
|
||||
}
|
||||
|
||||
return &tunHandler{
|
||||
options: options,
|
||||
}
|
||||
}
|
||||
|
||||
func (h *tunHandler) Init(md md.Metadata) (err error) {
|
||||
if err = h.parseMetadata(md); err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func (h *tunHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
|
||||
defer conn.Close()
|
||||
|
||||
log := h.options.Logger
|
||||
|
||||
var config *tun_util.Config
|
||||
if v, _ := conn.(md.Metadatable); v != nil {
|
||||
config = v.Metadata().Get("config").(*tun_util.Config)
|
||||
}
|
||||
if config == nil {
|
||||
err := errors.New("tun: wrong connection type")
|
||||
log.Error(err)
|
||||
return err
|
||||
}
|
||||
|
||||
start := time.Now()
|
||||
log = log.WithFields(map[string]any{
|
||||
"remote": conn.RemoteAddr().String(),
|
||||
"local": conn.LocalAddr().String(),
|
||||
"sid": string(ctxvalue.SidFromContext(ctx)),
|
||||
})
|
||||
|
||||
log.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
|
||||
defer func() {
|
||||
log.WithFields(map[string]any{
|
||||
"duration": time.Since(start),
|
||||
}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
|
||||
}()
|
||||
|
||||
th := newTransportHandler(&h.options)
|
||||
th.ProcessAsync()
|
||||
defer th.Close()
|
||||
|
||||
stack, err := core.CreateStack(&core.Config{
|
||||
LinkEndpoint: newEndpoint(conn, config.MTU, log),
|
||||
TransportHandler: th,
|
||||
})
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer stack.Close()
|
||||
|
||||
<-ctx.Done()
|
||||
|
||||
return nil
|
||||
}
|
||||
@@ -1,12 +0,0 @@
|
||||
package tun
|
||||
|
||||
import (
|
||||
mdata "github.com/go-gost/core/metadata"
|
||||
)
|
||||
|
||||
type metadata struct {
|
||||
}
|
||||
|
||||
func (h *tunHandler) parseMetadata(md mdata.Metadata) (err error) {
|
||||
return
|
||||
}
|
||||
@@ -1,166 +0,0 @@
|
||||
package tun
|
||||
|
||||
import (
|
||||
"context"
|
||||
"net"
|
||||
"net/netip"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/go-gost/core/handler"
|
||||
"github.com/go-gost/core/observer/stats"
|
||||
ctxvalue "github.com/go-gost/x/ctx"
|
||||
xnet "github.com/go-gost/x/internal/net"
|
||||
xstats "github.com/go-gost/x/observer/stats"
|
||||
stats_wrapper "github.com/go-gost/x/observer/stats/wrapper"
|
||||
xrecorder "github.com/go-gost/x/recorder"
|
||||
"github.com/rs/xid"
|
||||
"github.com/xjasonlyu/tun2socks/v2/core/adapter"
|
||||
"go.uber.org/atomic"
|
||||
)
|
||||
|
||||
const (
|
||||
// tcpConnectTimeout is the default timeout for TCP handshakes.
|
||||
tcpConnectTimeout = 5 * time.Second
|
||||
// tcpWaitTimeout implements a TCP half-close timeout.
|
||||
tcpWaitTimeout = 60 * time.Second
|
||||
// udpSessionTimeout is the default timeout for UDP sessions.
|
||||
udpSessionTimeout = 60 * time.Second
|
||||
)
|
||||
|
||||
var _ adapter.TransportHandler = (*transportHandler)(nil)
|
||||
|
||||
type transportHandler struct {
|
||||
// Unbuffered TCP/UDP queues.
|
||||
tcpQueue chan adapter.TCPConn
|
||||
udpQueue chan adapter.UDPConn
|
||||
|
||||
// UDP session timeout.
|
||||
udpTimeout *atomic.Duration
|
||||
|
||||
procOnce sync.Once
|
||||
procCancel context.CancelFunc
|
||||
|
||||
opts *handler.Options
|
||||
}
|
||||
|
||||
func newTransportHandler(opts *handler.Options) *transportHandler {
|
||||
return &transportHandler{
|
||||
tcpQueue: make(chan adapter.TCPConn),
|
||||
udpQueue: make(chan adapter.UDPConn),
|
||||
udpTimeout: atomic.NewDuration(udpSessionTimeout),
|
||||
procCancel: func() { /* nop */ },
|
||||
|
||||
opts: opts,
|
||||
}
|
||||
}
|
||||
|
||||
func (h *transportHandler) HandleTCP(conn adapter.TCPConn) {
|
||||
h.tcpQueue <- conn
|
||||
}
|
||||
|
||||
func (h *transportHandler) HandleUDP(conn adapter.UDPConn) {
|
||||
h.udpQueue <- conn
|
||||
}
|
||||
|
||||
func (h *transportHandler) process(ctx context.Context) {
|
||||
for {
|
||||
select {
|
||||
case conn := <-h.tcpQueue:
|
||||
go h.handleTCPConn(conn)
|
||||
case conn := <-h.udpQueue:
|
||||
go h.handleUDPConn(conn)
|
||||
case <-ctx.Done():
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// ProcessAsync can be safely called multiple times, but will only be effective once.
|
||||
func (h *transportHandler) ProcessAsync() {
|
||||
h.procOnce.Do(func() {
|
||||
ctx, cancel := context.WithCancel(context.Background())
|
||||
h.procCancel = cancel
|
||||
go h.process(ctx)
|
||||
})
|
||||
}
|
||||
|
||||
// Close closes the Tunnel and releases its resources.
|
||||
func (h *transportHandler) Close() {
|
||||
h.procCancel()
|
||||
}
|
||||
|
||||
func (h *transportHandler) SetUDPTimeout(timeout time.Duration) {
|
||||
h.udpTimeout.Store(timeout)
|
||||
}
|
||||
|
||||
func (h *transportHandler) handleTCPConn(originConn adapter.TCPConn) {
|
||||
defer originConn.Close()
|
||||
|
||||
id := originConn.ID()
|
||||
|
||||
remoteIP, _ := netip.AddrFromSlice(id.RemoteAddress.AsSlice())
|
||||
dstIP, _ := netip.AddrFromSlice(id.LocalAddress.AsSlice())
|
||||
|
||||
remoteAddr := netip.AddrPortFrom(remoteIP, id.RemotePort)
|
||||
dstAddr := netip.AddrPortFrom(dstIP, id.LocalPort)
|
||||
|
||||
start := time.Now()
|
||||
|
||||
sid := xid.New().String()
|
||||
ctx := ctxvalue.ContextWithSid(context.Background(), ctxvalue.Sid(sid))
|
||||
|
||||
ro := &xrecorder.HandlerRecorderObject{
|
||||
Service: h.opts.Service,
|
||||
Network: "tcp",
|
||||
RemoteAddr: remoteAddr.String(),
|
||||
Dst: dstAddr.String(),
|
||||
Time: start,
|
||||
SID: sid,
|
||||
}
|
||||
log := h.opts.Logger.WithFields(map[string]any{"network": "tcp", "sid": ro.SID})
|
||||
|
||||
log.Debugf("%s <> %s", remoteAddr.String(), dstAddr.String())
|
||||
|
||||
var err error
|
||||
var conn net.Conn = originConn
|
||||
|
||||
pStats := xstats.Stats{}
|
||||
conn = stats_wrapper.WrapConn(conn, &pStats)
|
||||
|
||||
defer func() {
|
||||
if err != nil {
|
||||
ro.Err = err.Error()
|
||||
}
|
||||
ro.InputBytes = pStats.Get(stats.KindInputBytes)
|
||||
ro.OutputBytes = pStats.Get(stats.KindOutputBytes)
|
||||
ro.Duration = time.Since(start)
|
||||
|
||||
log.WithFields(map[string]any{
|
||||
"duration": time.Since(start),
|
||||
"inputBytes": ro.InputBytes,
|
||||
"outputBytes": ro.OutputBytes,
|
||||
}).Infof("%s >< %s", remoteAddr.String(), dstAddr.String())
|
||||
}()
|
||||
|
||||
cc, err := h.opts.Router.Dial(ctx, "tcp", dstAddr.String())
|
||||
if err != nil {
|
||||
log.Errorf("dial %s: %v", dstAddr.String(), err)
|
||||
return
|
||||
}
|
||||
defer cc.Close()
|
||||
|
||||
ro.Src = cc.LocalAddr().String()
|
||||
|
||||
t := time.Now()
|
||||
log.Infof("%s <-> %s", remoteAddr, dstAddr)
|
||||
xnet.Transport(conn, cc)
|
||||
log.WithFields(map[string]any{
|
||||
"duration": time.Since(t),
|
||||
}).Infof("%s >-< %s", remoteAddr, dstAddr)
|
||||
}
|
||||
|
||||
// TODO: Port Restricted NAT support.
|
||||
func (t *transportHandler) handleUDPConn(uc adapter.UDPConn) {
|
||||
defer uc.Close()
|
||||
}
|
||||
Reference in New Issue
Block a user