diff options
Diffstat (limited to 'pkg/sentry/socket/epsocket')
| -rw-r--r-- | pkg/sentry/socket/epsocket/epsocket.go | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/pkg/sentry/socket/epsocket/epsocket.go b/pkg/sentry/socket/epsocket/epsocket.go index 4e547ea33..f7636e056 100644 --- a/pkg/sentry/socket/epsocket/epsocket.go +++ b/pkg/sentry/socket/epsocket/epsocket.go @@ -911,6 +911,21 @@ func getSockOptIP(t *kernel.Task, ep commonEndpoint, name, outLen int) (interfac } return rv.InetMulticastRequest, nil + case linux.IP_MULTICAST_LOOP: + if outLen < sizeOfInt32 { + return nil, syserr.ErrInvalidArgument + } + + var v tcpip.MulticastLoopOption + if err := ep.GetSockOpt(&v); err != nil { + return nil, syserr.TranslateNetstackError(err) + } + + if v { + return int32(1), nil + } + return int32(0), nil + default: emitUnimplementedEventIP(t, name) } @@ -1178,6 +1193,15 @@ func copyInMulticastRequest(optVal []byte) (linux.InetMulticastRequestWithNIC, * return req, nil } +// reduceToByte ORs all of the bytes in the input. +func reduceToByte(buf []byte) byte { + var out byte + for _, b := range buf { + out |= b + } + return out +} + // setSockOptIP implements SetSockOpt when level is SOL_IP. func setSockOptIP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *syserr.Error { switch name { @@ -1235,6 +1259,18 @@ func setSockOptIP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *s InterfaceAddr: bytesToIPAddress(req.InterfaceAddr[:]), })) + case linux.IP_MULTICAST_LOOP: + if len(optVal) < 1 { + return syserr.ErrInvalidArgument + } + if len(optVal) > sizeOfInt32 { + optVal = optVal[:sizeOfInt32] + } + + return syserr.TranslateNetstackError(ep.SetSockOpt( + tcpip.MulticastLoopOption(reduceToByte(optVal) != 0), + )) + case linux.MCAST_JOIN_GROUP: // FIXME: Implement MCAST_JOIN_GROUP. t.Kernel().EmitUnimplementedEvent(t) @@ -1252,7 +1288,6 @@ func setSockOptIP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *s linux.IP_MSFILTER, linux.IP_MTU_DISCOVER, linux.IP_MULTICAST_ALL, - linux.IP_MULTICAST_LOOP, linux.IP_NODEFRAG, linux.IP_OPTIONS, linux.IP_PASSSEC, |