/
ack_ecn.go
70 lines (62 loc) · 1.71 KB
/
ack_ecn.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
package scenarii
import (
qt "github.com/QUIC-Tracker/quic-tracker"
"github.com/QUIC-Tracker/quic-tracker/agents"
)
const (
AE_TLSHandshakeFailed = 1
AE_FailedToSetECN = 2
AE_NonECN = 3
AE_NoACKECNReceived = 4
AE_NonECNButACKECN = 5
)
type AckECNScenario struct {
AbstractScenario
}
func NewAckECNScenario() *AckECNScenario {
return &AckECNScenario{AbstractScenario{name: "ack_ecn", version: 1}}
}
func (s *AckECNScenario) Run(conn *qt.Connection, trace *qt.Trace, preferredPath string, debug bool) {
connAgents := s.CompleteHandshake(conn, trace, AE_TLSHandshakeFailed)
if connAgents == nil {
return
}
defer connAgents.CloseConnection(false, 0, "")
incPackets := conn.IncomingPackets.RegisterNewChan(1000)
socketAgent := connAgents.Get("SocketAgent").(*agents.SocketAgent)
err := socketAgent.ConfigureECN()
if err != nil {
trace.MarkError(AE_FailedToSetECN, err.Error(), nil)
return
}
connAgents.AddHTTPAgent().SendRequest(preferredPath, "GET", trace.Host, nil)
trace.ErrorCode = AE_NonECN
for {
select {
case i := <-incPackets:
switch p := i.(type) {
case qt.Framer:
if p.Contains(qt.AckECNType) {
if trace.ErrorCode == AE_NonECN {
trace.ErrorCode = AE_NonECNButACKECN
} else if trace.ErrorCode == AE_NoACKECNReceived {
trace.ErrorCode = 0
}
}
}
switch i.(qt.Packet).ReceiveContext().ECNStatus {
case qt.ECNStatusNonECT:
case qt.ECNStatusECT_0, qt.ECNStatusECT_1, qt.ECNStatusCE:
if trace.ErrorCode == AE_NonECN {
trace.ErrorCode = AE_NoACKECNReceived
} else if trace.ErrorCode == AE_NonECNButACKECN {
trace.ErrorCode = 0
}
}
case <-conn.ConnectionClosed:
return
case <-s.Timeout():
return
}
}
}