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packet_handler_map_test.go
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packet_handler_map_test.go
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package quic
import (
"bytes"
"errors"
"time"
"github.com/golang/mock/gomock"
"github.com/boisjacques/qed/internal/protocol"
"github.com/boisjacques/qed/internal/utils"
"github.com/boisjacques/qed/internal/wire"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("Packet Handler Map", func() {
var (
handler *packetHandlerMap
conn *mockPacketConn
)
getPacket := func(connID protocol.ConnectionID) []byte {
buf := &bytes.Buffer{}
err := (&wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
DestConnectionID: connID,
PacketNumberLen: protocol.PacketNumberLen1,
Version: protocol.VersionWhatever,
}).Write(buf, protocol.PerspectiveServer, protocol.VersionWhatever)
Expect(err).ToNot(HaveOccurred())
return buf.Bytes()
}
BeforeEach(func() {
conn = newMockPacketConn()
handler = newPacketHandlerMap(conn, 5, utils.DefaultLogger).(*packetHandlerMap)
})
It("closes", func() {
testErr := errors.New("test error ")
sess1 := NewMockPacketHandler(mockCtrl)
sess1.EXPECT().destroy(testErr)
sess2 := NewMockPacketHandler(mockCtrl)
sess2.EXPECT().destroy(testErr)
handler.Add(protocol.ConnectionID{1, 1, 1, 1}, sess1)
handler.Add(protocol.ConnectionID{2, 2, 2, 2}, sess2)
handler.close(testErr)
})
Context("handling packets", func() {
It("handles packets for different packet handlers on the same packet Conn", func() {
connID1 := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
connID2 := protocol.ConnectionID{8, 7, 6, 5, 4, 3, 2, 1}
packetHandler1 := NewMockPacketHandler(mockCtrl)
packetHandler2 := NewMockPacketHandler(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)
})
packetHandler1.EXPECT().GetVersion()
packetHandler1.EXPECT().GetPerspective().Return(protocol.PerspectiveClient)
packetHandler2.EXPECT().handlePacket(gomock.Any()).Do(func(p *receivedPacket) {
Expect(p.header.DestConnectionID).To(Equal(connID2))
close(handledPacket2)
})
packetHandler2.EXPECT().GetVersion()
packetHandler2.EXPECT().GetPerspective().Return(protocol.PerspectiveClient)
handler.Add(connID1, packetHandler1)
handler.Add(connID2, packetHandler2)
conn.dataToRead <- getPacket(connID1)
conn.dataToRead <- getPacket(connID2)
Eventually(handledPacket1).Should(BeClosed())
Eventually(handledPacket2).Should(BeClosed())
// makes the listen go routine return
packetHandler1.EXPECT().destroy(gomock.Any()).AnyTimes()
packetHandler2.EXPECT().destroy(gomock.Any()).AnyTimes()
close(conn.dataToRead)
})
It("drops unparseable packets", func() {
err := handler.handlePacket(nil, []byte{0, 1, 2, 3})
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("error parsing invariant header:"))
})
It("deletes nil session entries after a wait time", func() {
handler.deleteClosedSessionsAfter = 10 * time.Millisecond
connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
handler.Add(connID, NewMockPacketHandler(mockCtrl))
handler.Remove(connID)
Eventually(func() error {
return handler.handlePacket(nil, getPacket(connID))
}).Should(MatchError("received a packet with an unexpected Connection ID 0x0102030405060708"))
})
It("ignores packets arriving late for closed sessions", func() {
handler.deleteClosedSessionsAfter = time.Hour
connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
handler.Add(connID, NewMockPacketHandler(mockCtrl))
handler.Remove(connID)
err := handler.handlePacket(nil, getPacket(connID))
Expect(err).ToNot(HaveOccurred())
})
It("drops packets for unknown receivers", func() {
connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
err := handler.handlePacket(nil, getPacket(connID))
Expect(err).To(MatchError("received a packet with an unexpected Connection ID 0x0102030405060708"))
})
It("errors on packets that are smaller than the Payload Length in the packet header", func() {
connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
packetHandler := NewMockPacketHandler(mockCtrl)
packetHandler.EXPECT().GetVersion().Return(protocol.VersionWhatever)
packetHandler.EXPECT().GetPerspective().Return(protocol.PerspectiveClient)
handler.Add(connID, packetHandler)
hdr := &wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
PayloadLen: 1000,
DestConnectionID: connID,
PacketNumberLen: protocol.PacketNumberLen1,
Version: protocol.VersionWhatever,
}
buf := &bytes.Buffer{}
Expect(hdr.Write(buf, protocol.PerspectiveServer, protocol.VersionWhatever)).To(Succeed())
buf.Write(bytes.Repeat([]byte{0}, 500))
err := handler.handlePacket(nil, buf.Bytes())
Expect(err).To(MatchError("packet payload (500 bytes) is smaller than the expected payload length (1000 bytes)"))
})
It("cuts packets at the Payload Length", func() {
connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
packetHandler := NewMockPacketHandler(mockCtrl)
packetHandler.EXPECT().GetVersion().Return(protocol.VersionWhatever)
packetHandler.EXPECT().GetPerspective().Return(protocol.PerspectiveClient)
handler.Add(connID, packetHandler)
packetHandler.EXPECT().handlePacket(gomock.Any()).Do(func(p *receivedPacket) {
Expect(p.data).To(HaveLen(456))
})
hdr := &wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
PayloadLen: 456,
DestConnectionID: connID,
PacketNumberLen: protocol.PacketNumberLen1,
Version: protocol.VersionWhatever,
}
buf := &bytes.Buffer{}
Expect(hdr.Write(buf, protocol.PerspectiveServer, protocol.VersionWhatever)).To(Succeed())
buf.Write(bytes.Repeat([]byte{0}, 500))
err := handler.handlePacket(nil, buf.Bytes())
Expect(err).ToNot(HaveOccurred())
})
It("closes the packet handlers when reading from the Conn fails", func() {
done := make(chan struct{})
packetHandler := NewMockPacketHandler(mockCtrl)
packetHandler.EXPECT().destroy(gomock.Any()).Do(func(e error) {
Expect(e).To(HaveOccurred())
close(done)
})
handler.Add(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}, packetHandler)
conn.Close()
Eventually(done).Should(BeClosed())
})
})
Context("running a server", func() {
It("adds a server", func() {
connID := protocol.ConnectionID{0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}
p := getPacket(connID)
server := NewMockUnknownPacketHandler(mockCtrl)
server.EXPECT().handlePacket(gomock.Any()).Do(func(p *receivedPacket) {
Expect(p.header.DestConnectionID).To(Equal(connID))
})
handler.SetServer(server)
Expect(handler.handlePacket(nil, p)).To(Succeed())
})
It("closes all server sessions", func() {
clientSess := NewMockPacketHandler(mockCtrl)
clientSess.EXPECT().GetPerspective().Return(protocol.PerspectiveClient)
serverSess := NewMockPacketHandler(mockCtrl)
serverSess.EXPECT().GetPerspective().Return(protocol.PerspectiveServer)
serverSess.EXPECT().Close()
handler.Add(protocol.ConnectionID{1, 1, 1, 1}, clientSess)
handler.Add(protocol.ConnectionID{2, 2, 2, 2}, serverSess)
handler.CloseServer()
})
It("stops handling packets with unknown Connection IDs after the server is closed", func() {
connID := protocol.ConnectionID{0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}
p := getPacket(connID)
server := NewMockUnknownPacketHandler(mockCtrl)
handler.SetServer(server)
handler.CloseServer()
Expect(handler.handlePacket(nil, p)).To(MatchError("received a packet with an unexpected Connection ID 0x1122334455667788"))
})
})
})