diff options
| author | Marina Ciocea <marinaciocea@google.com> | 2021-01-28 06:23:04 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-01-28 06:24:46 -0800 |
| commit | 6012fe9b5965a2f285f2f99312e6cb7ae84b5fa8 (patch) | |
| tree | c2a29a720d2e557a3ed2712fc71380ba9f39509a /pkg/tcpip/transport | |
| parent | b85b23e50d1c264ff4821e182ad89a8ea3d0e0c5 (diff) | |
Respect SO_BINDTODEVICE in unconnected UDP writes
Previously, sending on an unconnected UDP socket would ignore the
SO_BINDTODEVICE option. Send on the configured interface when an UDP socket
is bound to an interface through setsockop SO_BINDTODEVICE.
Add packetimpact tests exercising UDP reads and writes with every combination
of bound/unbound, broadcast/multicast/unicast destination, and bound/not-bound
to device.
PiperOrigin-RevId: 354299670
Diffstat (limited to 'pkg/tcpip/transport')
| -rw-r--r-- | pkg/tcpip/transport/udp/endpoint.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go index 4988ba29b..d2f7b6e85 100644 --- a/pkg/tcpip/transport/udp/endpoint.go +++ b/pkg/tcpip/transport/udp/endpoint.go @@ -480,6 +480,9 @@ func (e *endpoint) write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, *tc // Reject destination address if it goes through a different // NIC than the endpoint was bound to. nicID := to.NIC + if nicID == 0 { + nicID = tcpip.NICID(e.ops.GetBindToDevice()) + } if e.BindNICID != 0 { if nicID != 0 && nicID != e.BindNICID { return 0, tcpip.ErrNoRoute |