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Commit2d61d53

Browse files
authored
fix: detect JetBrains running on local ipv6 (#11653)
1 parentbe43d62 commit2d61d53

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3 files changed

+65
-31
lines changed

3 files changed

+65
-31
lines changed

‎agent/agent_test.go

Lines changed: 34 additions & 21 deletions
Original file line numberDiff line numberDiff line change
@@ -214,46 +214,59 @@ func TestAgent_Stats_Magic(t *testing.T) {
214214
_,b,_,ok:=runtime.Caller(0)
215215
require.True(t,ok)
216216
dir:=filepath.Join(filepath.Dir(b),"../scripts/echoserver/main.go")
217-
echoServerCmd:=exec.Command("go","run",dir,
218-
"-D",agentssh.MagicProcessCmdlineJetBrains)
219-
stdout,err:=echoServerCmd.StdoutPipe()
220-
require.NoError(t,err)
221-
err=echoServerCmd.Start()
222-
require.NoError(t,err)
223-
deferechoServerCmd.Process.Kill()
224217

225-
// The echo server prints its port as the first line.
226-
sc:=bufio.NewScanner(stdout)
227-
sc.Scan()
228-
remotePort:=sc.Text()
218+
spawnServer:=func(networkstring) (string,*exec.Cmd) {
219+
echoServerCmd:=exec.Command("go","run",dir,
220+
network,"-D",agentssh.MagicProcessCmdlineJetBrains)
221+
stdout,err:=echoServerCmd.StdoutPipe()
222+
require.NoError(t,err)
223+
err=echoServerCmd.Start()
224+
require.NoError(t,err)
225+
t.Cleanup(func() {
226+
echoServerCmd.Process.Kill()
227+
})
228+
229+
// The echo server prints its port as the first line.
230+
sc:=bufio.NewScanner(stdout)
231+
sc.Scan()
232+
returnsc.Text(),echoServerCmd
233+
}
234+
235+
port4,cmd4:=spawnServer("tcp4")
236+
port6,cmd6:=spawnServer("tcp6")
229237

230238
//nolint:dogsled
231239
conn,_,stats,_,_:=setupAgent(t, agentsdk.Manifest{},0)
240+
deferconn.Close()
241+
232242
sshClient,err:=conn.SSHClient(ctx)
233243
require.NoError(t,err)
234244

235-
tunneledConn,err:=sshClient.Dial("tcp",fmt.Sprintf("127.0.0.1:%s",remotePort))
245+
tunnel4,err:=sshClient.Dial("tcp4",fmt.Sprintf("127.0.0.1:%s",port4))
236246
require.NoError(t,err)
237-
t.Cleanup(func() {
238-
// always close on failure of test
239-
_=conn.Close()
240-
_=tunneledConn.Close()
241-
})
247+
defertunnel4.Close()
248+
249+
tunnel6,err:=sshClient.Dial("tcp6",fmt.Sprintf("[::]:%s",port6))
250+
require.NoError(t,err)
251+
defertunnel6.Close()
242252

243253
require.Eventuallyf(t,func()bool {
244254
s,ok:=<-stats
245255
t.Logf("got stats with conn open: ok=%t, ConnectionCount=%d, SessionCountJetBrains=%d",
246256
ok,s.ConnectionCount,s.SessionCountJetBrains)
247257
returnok&&s.ConnectionCount>0&&
248-
s.SessionCountJetBrains==1
258+
s.SessionCountJetBrains==2
249259
},testutil.WaitLong,testutil.IntervalFast,
250260
"never saw stats with conn open",
251261
)
252262

253263
// Kill the server and connection after checking for the echo.
254-
requireEcho(t,tunneledConn)
255-
_=echoServerCmd.Process.Kill()
256-
_=tunneledConn.Close()
264+
requireEcho(t,tunnel4)
265+
requireEcho(t,tunnel6)
266+
_=cmd4.Process.Kill()
267+
_=cmd6.Process.Kill()
268+
_=tunnel4.Close()
269+
_=tunnel6.Close()
257270

258271
require.Eventuallyf(t,func()bool {
259272
s,ok:=<-stats

‎agent/agentssh/portinspection_supported.go

Lines changed: 19 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -3,6 +3,7 @@
33
package agentssh
44

55
import (
6+
"errors"
67
"fmt"
78
"os"
89

@@ -11,24 +12,33 @@ import (
1112
)
1213

1314
funcgetListeningPortProcessCmdline(portuint32) (string,error) {
14-
tabs,err:=netstat.TCPSocks(func(s*netstat.SockTabEntry)bool {
15+
acceptFn:=func(s*netstat.SockTabEntry)bool {
1516
returns.LocalAddr!=nil&&uint32(s.LocalAddr.Port)==port
16-
})
17-
iferr!=nil {
18-
return"",xerrors.Errorf("inspect port %d: %w",port,err)
1917
}
20-
iflen(tabs)==0 {
21-
return"",nil
18+
tabs,err:=netstat.TCPSocks(acceptFn)
19+
tabs6,err6:=netstat.TCP6Socks(acceptFn)
20+
21+
// Only return the error if the other method found nothing.
22+
if (err!=nil&&len(tabs6)==0)|| (err6!=nil&&len(tabs)==0) {
23+
return"",xerrors.Errorf("inspect port %d: %w",port,errors.Join(err,err6))
2224
}
2325

24-
// Defensive check.
25-
iftabs[0].Process==nil {
26+
varproc*netstat.Process
27+
iflen(tabs)>0 {
28+
proc=tabs[0].Process
29+
}elseiflen(tabs6)>0 {
30+
proc=tabs6[0].Process
31+
}
32+
ifproc==nil {
33+
// Either nothing is listening on this port or we were unable to read the
34+
// process details (permission issues reading /proc/$pid/* potentially).
35+
// Or, perhaps /proc/net/tcp{,6} is not listing the port for some reason.
2636
return"",nil
2737
}
2838

2939
// The process name provided by go-netstat does not include the full command
3040
// line so grab that instead.
31-
pid:=tabs[0].Process.Pid
41+
pid:=proc.Pid
3242
data,err:=os.ReadFile(fmt.Sprintf("/proc/%d/cmdline",pid))
3343
iferr!=nil {
3444
return"",xerrors.Errorf("read /proc/%d/cmdline: %w",pid,err)

‎scripts/echoserver/main.go

Lines changed: 12 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -9,10 +9,21 @@ import (
99
"io"
1010
"log"
1111
"net"
12+
"os"
1213
)
1314

1415
funcmain() {
15-
l,err:=net.Listen("tcp","127.0.0.1:0")
16+
network:=os.Args[1]
17+
varaddressstring
18+
switchnetwork {
19+
case"tcp4":
20+
address="127.0.0.1"
21+
case"tcp6":
22+
address="[::]"
23+
default:
24+
log.Fatalf("invalid network: %s",network)
25+
}
26+
l,err:=net.Listen(network,address+":0")
1627
iferr!=nil {
1728
log.Fatalf("listen error: err=%s",err)
1829
}

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