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Fix SplitHTTP race condition when creating new sessions #3533

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merged 3 commits into from
Jul 17, 2024
Merged

Fix SplitHTTP race condition when creating new sessions #3533

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13c2d50
Try to fix infinite conn read in SH tests
yuhan6665 Jul 13, 2024
f04d221
fix SplitHTTP unit test fails bug
Jul 16, 2024
51b8e03
remove sleeps from tests
mmmray Jul 17, 2024
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12 changes: 12 additions & 0 deletions transport/internet/splithttp/hub.go
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ type requestHandler struct {
host string
path string
ln *Listener
sessionMu *sync.Mutex
sessions sync.Map
localAddr gonet.TCPAddr
}
Expand Down Expand Up @@ -56,11 +57,21 @@ func (h *requestHandler) maybeReapSession(isFullyConnected *done.Instance, sessi
}

func (h *requestHandler) upsertSession(sessionId string) *httpSession {
// fast path
currentSessionAny, ok := h.sessions.Load(sessionId)
if ok {
return currentSessionAny.(*httpSession)
}

// slow path
h.sessionMu.Lock()
defer h.sessionMu.Unlock()

currentSessionAny, ok = h.sessions.Load(sessionId)
if ok {
return currentSessionAny.(*httpSession)
}

s := &httpSession{
uploadQueue: NewUploadQueue(int(2 * h.ln.config.GetNormalizedMaxConcurrentUploads())),
isFullyConnected: done.New(),
Expand Down Expand Up @@ -277,6 +288,7 @@ func ListenSH(ctx context.Context, address net.Address, port net.Port, streamSet
host: shSettings.Host,
path: shSettings.GetNormalizedPath(),
ln: l,
sessionMu: &sync.Mutex{},
sessions: sync.Map{},
localAddr: localAddr,
}
Expand Down
2 changes: 1 addition & 1 deletion transport/internet/splithttp/splithttp_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -63,8 +63,8 @@ func Test_listenSHAndDial(t *testing.T) {
}

common.Must(conn.Close())
<-time.After(time.Second * 5)
conn, err = Dial(ctx, net.TCPDestination(net.DomainAddress("localhost"), listenPort), streamSettings)

common.Must(err)
_, err = conn.Write([]byte("Test connection 2"))
common.Must(err)
Expand Down