multiplex multiple clients on one packet conn

2018-05-22 11:08:48 +08:00
parent dacc94ccba
commit 2c05dbff07
9 changed files with 259 additions and 27 deletions
--- a/client_multiplexer_test.go
+++ b/client_multiplexer_test.go
@@ -0,0 +1,106 @@
+package quic
+
+import (
+	"bytes"
+	"errors"
+	"time"
+
+	"github.com/golang/mock/gomock"
+	"github.com/lucas-clemente/quic-go/internal/protocol"
+	"github.com/lucas-clemente/quic-go/internal/wire"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Client Multiplexer", func() {
+	getPacket := func(connID protocol.ConnectionID) []byte {
+		buf := &bytes.Buffer{}
+		err := (&wire.Header{
+			SrcConnectionID:  connID,
+			DestConnectionID: connID,
+			PacketNumberLen:  protocol.PacketNumberLen1,
+		}).Write(buf, protocol.PerspectiveServer, protocol.VersionWhatever)
+		Expect(err).ToNot(HaveOccurred())
+		return buf.Bytes()
+	}
+
+	It("adds a new packet conn and handles packets", func() {
+		conn := newMockPacketConn()
+		connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
+		conn.dataToRead <- getPacket(connID)
+		packetHandler := NewMockQuicSession(mockCtrl)
+		handledPacket := make(chan struct{})
+		packetHandler.EXPECT().handlePacket(gomock.Any()).Do(func(_ *receivedPacket) {
+			close(handledPacket)
+		})
+		getClientMultiplexer().Add(conn, connID, packetHandler)
+		Eventually(handledPacket).Should(BeClosed())
+		// makes the listen go routine return
+		packetHandler.EXPECT().Close(gomock.Any()).AnyTimes()
+		close(conn.dataToRead)
+	})
+
+	It("handles packets for different packet handlers on the same packet conn", func() {
+		conn := newMockPacketConn()
+		connID1 := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
+		connID2 := protocol.ConnectionID{8, 7, 6, 5, 4, 3, 2, 1}
+		conn.dataToRead <- getPacket(connID1)
+		conn.dataToRead <- getPacket(connID2)
+		packetHandler1 := NewMockQuicSession(mockCtrl)
+		packetHandler2 := NewMockQuicSession(mockCtrl)
+		handledPacket1 := make(chan struct{})
+		handledPacket2 := make(chan struct{})
+		packetHandler1.EXPECT().handlePacket(gomock.Any()).Do(func(p *receivedPacket) {
+			Expect(p.header.DestConnectionID).To(Equal(connID1))
+			close(handledPacket1)
+		})
+		packetHandler2.EXPECT().handlePacket(gomock.Any()).Do(func(p *receivedPacket) {
+			Expect(p.header.DestConnectionID).To(Equal(connID2))
+			close(handledPacket2)
+		})
+		getClientMultiplexer().Add(conn, connID1, packetHandler1)
+		getClientMultiplexer().Add(conn, connID2, packetHandler2)
+		Eventually(handledPacket1).Should(BeClosed())
+		Eventually(handledPacket2).Should(BeClosed())
+		// makes the listen go routine return
+		packetHandler1.EXPECT().Close(gomock.Any()).AnyTimes()
+		packetHandler2.EXPECT().Close(gomock.Any()).AnyTimes()
+		close(conn.dataToRead)
+	})
+
+	It("drops unparseable packets", func() {
+		conn := newMockPacketConn()
+		connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
+		conn.dataToRead <- []byte("invalid header")
+		packetHandler := NewMockQuicSession(mockCtrl)
+		getClientMultiplexer().Add(conn, connID, packetHandler)
+		time.Sleep(100 * time.Millisecond) // give the listen go routine some time to process the packet
+		packetHandler.EXPECT().Close(gomock.Any()).AnyTimes()
+		close(conn.dataToRead)
+	})
+
+	It("drops packets for unknown receivers", func() {
+		conn := newMockPacketConn()
+		conn.dataToRead <- getPacket(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8})
+		packetHandler := NewMockQuicSession(mockCtrl)
+		getClientMultiplexer().Add(conn, protocol.ConnectionID{8, 7, 6, 5, 4, 3, 2, 1}, packetHandler)
+		time.Sleep(100 * time.Millisecond) // give the listen go routine some time to process the packet
+		// makes the listen go routine return
+		packetHandler.EXPECT().Close(gomock.Any()).AnyTimes()
+		close(conn.dataToRead)
+	})
+
+	It("closes the packet handlers when reading from the conn fails", func() {
+		conn := newMockPacketConn()
+		testErr := errors.New("test error")
+		conn.readErr = testErr
+		done := make(chan struct{})
+		packetHandler := NewMockQuicSession(mockCtrl)
+		packetHandler.EXPECT().Close(testErr).Do(func(error) {
+			close(done)
+		})
+		getClientMultiplexer().Add(conn, protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}, packetHandler)
+		Eventually(done).Should(BeClosed())
+	})
+})