netbird/gvisor
0
0
Fork 0
mirror of https://github.com/netbirdio/gvisor.git synced 2026-05-22 17:12:49 -07:00
Code Issues Packages Projects Releases Wiki Activity

Skip listening TCP ports when trying to bind a free port.

Browse Source 
PiperOrigin-RevId: 327686558
This commit is contained in:
Bhasker Hariharan
2020-08-20 13:25:23 -07:00
committed by gVisor bot
parent 7ca62b9daa
commit f12b545d8f
8 changed files with 191 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files
pkg/sentry/socket/netstack/netstack.go
+14 -1
View File
@@ -803,7 +803,20 @@ func (s *socketOpsCommon) Bind(t *kernel.Task, sockaddr []byte) *syserr.Error {
}
// Issue the bind request to the endpoint.
return syserr.TranslateNetstackError(s.Endpoint.Bind(addr))
err := s.Endpoint.Bind(addr)
if err == tcpip.ErrNoPortAvailable {
// Bind always returns EADDRINUSE irrespective of if the specified port was
// already bound or if an ephemeral port was requested but none were
// available.
//
// tcpip.ErrNoPortAvailable is mapped to EAGAIN in syserr package because
// UDP connect returns EAGAIN on ephemeral port exhaustion.
//
// TCP connect returns EADDRNOTAVAIL on ephemeral port exhaustion.
err = tcpip.ErrPortInUse
}
return syserr.TranslateNetstackError(err)
}
// Listen implements the linux syscall listen(2) for sockets backed by