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[UT] Add unit test for existed connection #51

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Sep 21, 2024
Merged

[UT] Add unit test for existed connection #51

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6 changes: 3 additions & 3 deletions agent/agent.go
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Original file line number Diff line number Diff line change
Expand Up @@ -698,13 +698,13 @@ func getBestMatchedBTFFile() ([]uint8, error) {
common.AgentLog.Debugf("[sys info] vendor: %s, os_arch: %s, kernel_arch: %s", si.OS.Vendor, si.OS.Architecture, si.Kernel.Architecture)

if si.OS.Vendor != "ubuntu" && si.OS.Vendor != "centos" {
panic("Current only support centos and ubuntu")
common.AgentLog.Fatal("Current only support centos and ubuntu")
}
if si.OS.Architecture != "amd64" {
panic("Current only support amd64")
common.AgentLog.Fatal("Current only support amd64")
}
if si.Kernel.Architecture != "x86_64" {
panic("Current only support x86_64")
common.AgentLog.Fatal("Current only support x86_64")
}

var btfFileDir string
Expand Down
237 changes: 130 additions & 107 deletions agent/agent_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -160,6 +160,100 @@ func TestAccept(t *testing.T) {
})
}

func TestExistedConn(t *testing.T) {
StartEchoTcpServerAndWait()
ip := "127.0.0.1"
sendMsg := "GET TestRead\n"
connection := WriteToEchoTcpServerAndReadResponse(WriteToEchoServerOptions{
t: t,
server: ip + ":" + fmt.Sprint(echoTcpServerPort),
message: sendMsg,
readResponse: true,
writeSyscall: Write,
readSyscall: Read,
keepConnection: true,
})
// established conn and write data before start kyanos

connEventList := make([]bpf.AgentConnEvtT, 0)
syscallEventList := make([]bpf.SyscallEventData, 0)
kernEventList := make([]bpf.AgentKernEvt, 0)
var connManager *conn.ConnManager = conn.InitConnManager()
agentStopper := make(chan os.Signal)
StartAgent(
nil,
&connEventList,
&syscallEventList,
&kernEventList,
func(cm *conn.ConnManager) {
*connManager = *cm
}, agentStopper)
defer func() {
agentStopper <- MySignal{}
}()
// then write data
WriteToEchoTcpServerAndReadResponse(WriteToEchoServerOptions{
t: t,
server: ip + ":" + fmt.Sprint(echoTcpServerPort),
message: sendMsg,
readResponse: true,
writeSyscall: Write,
readSyscall: Read,
keepConnection: true,
existedConnection: connection,
})
WriteToEchoTcpServerAndReadResponse(WriteToEchoServerOptions{
t: t,
server: ip + ":" + fmt.Sprint(echoTcpServerPort),
message: sendMsg,
readResponse: true,
writeSyscall: Write,
readSyscall: Read,
keepConnection: true,
existedConnection: connection,
})
time.Sleep(1500 * time.Millisecond)

assert.True(t, len(syscallEventList) > 0)
assert.True(t, len(connEventList) > 0)
assert.True(t, len(kernEventList) > 0)
assert.True(t, len(findInterestedKernEvents(t, kernEventList, FindInterestedKernEventOptions{
connEventList: connEventList,
findByStep: true,
step: bpf.AgentStepTIP_OUT,
})) > 0)
assert.True(t, len(findInterestedKernEvents(t, kernEventList, FindInterestedKernEventOptions{
connEventList: connEventList,
findByStep: true,
step: bpf.AgentStepTQDISC_OUT,
})) > 0)
assert.True(t, len(findInterestedKernEvents(t, kernEventList, FindInterestedKernEventOptions{
connEventList: connEventList,
findByStep: true,
step: bpf.AgentStepTDEV_OUT,
})) > 0)
assert.True(t, len(findInterestedKernEvents(t, kernEventList, FindInterestedKernEventOptions{
connEventList: connEventList,
findByStep: true,
step: bpf.AgentStepTDEV_IN,
})) > 0)
assert.True(t, len(findInterestedKernEvents(t, kernEventList, FindInterestedKernEventOptions{
connEventList: connEventList,
findByStep: true,
step: bpf.AgentStepTIP_IN,
})) > 0)
assert.True(t, len(findInterestedKernEvents(t, kernEventList, FindInterestedKernEventOptions{
connEventList: connEventList,
findByStep: true,
step: bpf.AgentStepTTCP_IN,
})) > 0)
assert.True(t, len(findInterestedKernEvents(t, kernEventList, FindInterestedKernEventOptions{
connEventList: connEventList,
findByStep: true,
step: bpf.AgentStepTUSER_COPY,
})) > 0)
}

func TestRead(t *testing.T) {
StartEchoTcpServerAndWait()
connEventList := make([]bpf.AgentConnEvtT, 0)
Expand Down Expand Up @@ -667,98 +761,20 @@ func TestSendMsg(t *testing.T) {
}
}

func KernRcvTestWithHTTP(t *testing.T, progs []bpf.AttachBpfProgFunction, kernEvtFilter FindInterestedKernEventOptions, kernEvtAsserts KernDataEventAssertConditions) {
connEventList := make([]bpf.AgentConnEvtT, 0)
syscallEventList := make([]bpf.SyscallEventData, 0)
kernEventList := make([]bpf.AgentKernEvt, 0)
var connManager *conn.ConnManager = conn.InitConnManager()
agentStopper := make(chan os.Signal, 1)
StartAgent(
progs,
&connEventList,
&syscallEventList,
&kernEventList,
func(cm *conn.ConnManager) {
*connManager = *cm
}, agentStopper)

defer func() {
agentStopper <- MySignal{}
time.Sleep(1 * time.Second)
}()
sendTestRequest(t, SendTestHttpRequestOptions{
targetUrl: "http://www.baidu.com/abc",
disableKeepAlived: true,
})

kernEvtFilter.connEventList = connEventList
time.Sleep(500 * time.Millisecond)
intersetedKernEvents := findInterestedKernEvents(t, kernEventList, kernEvtFilter)
assert.Equal(t, 1, len(intersetedKernEvents))
kernEvent := intersetedKernEvents[0]
conn := connManager.FindConnection4Exactly(kernEvent.ConnIdS.TgidFd)
if !kernEvtAsserts.ignoreFd && kernEvtAsserts.fd == 0 {
kernEvtAsserts.fd = uint32(conn.TgidFd)
}
AssertKernEvent(t, &kernEvent, kernEvtAsserts)
}

func KernTestWithTcpEchoServer(t *testing.T, progs []bpf.AttachBpfProgFunction, testMessage string, writeSyscall WriteSyscallType,
readSyscall ReadSyscallType, kernEvtFilter FindInterestedKernEventOptions, kernEvtAsserts KernDataEventAssertConditions) {
StartEchoTcpServerAndWait()
connEventList := make([]bpf.AgentConnEvtT, 0)
syscallEventList := make([]bpf.SyscallEventData, 0)
kernEventList := make([]bpf.AgentKernEvt, 0)
var connManager *conn.ConnManager = conn.InitConnManager()
agentStopper := make(chan os.Signal, 1)
StartAgent(
progs,
&connEventList,
&syscallEventList,
&kernEventList,
func(cm *conn.ConnManager) {
*connManager = *cm
}, agentStopper)

defer func() {
agentStopper <- MySignal{}
}()
ip := "127.0.0.1"
sendMsg := testMessage
WriteToEchoTcpServerAndReadResponse(WriteToEchoServerOptions{
t: t,
server: ip + ":" + fmt.Sprint(echoTcpServerPort),
message: sendMsg,
readResponse: true,
writeSyscall: writeSyscall,
readSyscall: readSyscall,
})
time.Sleep(500 * time.Millisecond)
kernEvtFilter.connEventList = connEventList
intersetedKernEvents := findInterestedKernEvents(t, kernEventList, kernEvtFilter)
assert.Equal(t, 1, len(intersetedKernEvents))
kernEvent := intersetedKernEvents[0]
conn := connManager.FindConnection4Exactly(kernEvent.ConnIdS.TgidFd)
if !kernEvtAsserts.ignoreFd && kernEvtAsserts.fd == 0 {
kernEvtAsserts.fd = uint32(conn.TgidFd)
}

if !kernEvtAsserts.ignoreDataLen && kernEvtAsserts.dataLen == 0 {
kernEvtAsserts.dataLen = uint32(len(sendMsg))
}
AssertKernEvent(t, &kernEvent, kernEvtAsserts)
}
func TestIpXmit(t *testing.T) {
KernTestWithTcpEchoServer(t, []bpf.AttachBpfProgFunction{
bpf.AttachSyscallConnectEntry,
bpf.AttachSyscallConnectExit,
bpf.AttachSyscallWriteEntry,
bpf.AttachSyscallWriteExit,
bpf.AttachKProbeSecuritySocketSendmsgEntry,
func(p interface{}) link.Link {
return ApplyKernelVersionFunctions(t, bpf.AgentStepTIP_OUT, p)
options := KernTestWithTcpEchoServerOptions{
t,
[]bpf.AttachBpfProgFunction{
bpf.AttachSyscallConnectEntry,
bpf.AttachSyscallConnectExit,
bpf.AttachSyscallWriteEntry,
bpf.AttachSyscallWriteExit,
bpf.AttachKProbeSecuritySocketSendmsgEntry,
func(p interface{}) link.Link {
return ApplyKernelVersionFunctions(t, bpf.AgentStepTIP_OUT, p)
},
},
}, "GET TestIpXmit\n", Write, Read,
"GET TestIpXmit\n", Write, Read,
FindInterestedKernEventOptions{
findDataLenGtZeroEvent: true,
findByDirect: true,
Expand All @@ -772,11 +788,13 @@ func TestIpXmit(t *testing.T) {
seq: 1,
step: bpf.AgentStepTIP_OUT,
tsAssertFunction: func(u uint64) bool { return u > 0 },
})
},
}
KernTestWithTcpEchoServer(options)
}

func TestDevQueueXmit(t *testing.T) {
KernTestWithTcpEchoServer(t, []bpf.AttachBpfProgFunction{
options := KernTestWithTcpEchoServerOptions{t, []bpf.AttachBpfProgFunction{
bpf.AttachSyscallConnectEntry,
bpf.AttachSyscallConnectExit,
bpf.AttachSyscallWriteEntry,
Expand Down Expand Up @@ -804,23 +822,26 @@ func TestDevQueueXmit(t *testing.T) {
seq: 1,
step: bpf.AgentStepTQDISC_OUT,
tsAssertFunction: func(u uint64) bool { return u > 0 },
})
},
}
KernTestWithTcpEchoServer(options)
}

func TestDevHardStartXmit(t *testing.T) {
KernTestWithTcpEchoServer(t, []bpf.AttachBpfProgFunction{
bpf.AttachSyscallConnectEntry,
bpf.AttachSyscallConnectExit,
bpf.AttachSyscallWriteEntry,
bpf.AttachSyscallWriteExit,
bpf.AttachKProbeSecuritySocketSendmsgEntry,
func(p interface{}) link.Link {
return ApplyKernelVersionFunctions(t, bpf.AgentStepTIP_OUT, p)
},
func(p interface{}) link.Link {
return ApplyKernelVersionFunctions(t, bpf.AgentStepTDEV_OUT, p)
},
}, "GET DevHardStartXmit\n", Write, Read,
options := KernTestWithTcpEchoServerOptions{
t, []bpf.AttachBpfProgFunction{
bpf.AttachSyscallConnectEntry,
bpf.AttachSyscallConnectExit,
bpf.AttachSyscallWriteEntry,
bpf.AttachSyscallWriteExit,
bpf.AttachKProbeSecuritySocketSendmsgEntry,
func(p interface{}) link.Link {
return ApplyKernelVersionFunctions(t, bpf.AgentStepTIP_OUT, p)
},
func(p interface{}) link.Link {
return ApplyKernelVersionFunctions(t, bpf.AgentStepTDEV_OUT, p)
},
}, "GET DevHardStartXmit\n", Write, Read,
FindInterestedKernEventOptions{
findDataLenGtZeroEvent: true,
findByDirect: true,
Expand All @@ -836,7 +857,9 @@ func TestDevHardStartXmit(t *testing.T) {
seq: 1,
step: bpf.AgentStepTDEV_OUT,
tsAssertFunction: func(u uint64) bool { return u > 0 },
})
},
}
KernTestWithTcpEchoServer(options)
}

func TestTracepointNetifReceiveSkb(t *testing.T) {
Expand Down
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