diff options
Diffstat (limited to 'pkg/sentry/syscalls')
| -rw-r--r-- | pkg/sentry/syscalls/linux/sys_socket.go | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/pkg/sentry/syscalls/linux/sys_socket.go b/pkg/sentry/syscalls/linux/sys_socket.go index 1513f28e7..564357bac 100644 --- a/pkg/sentry/syscalls/linux/sys_socket.go +++ b/pkg/sentry/syscalls/linux/sys_socket.go @@ -57,6 +57,10 @@ const nameLenOffset = 8 // to the ControlLen field. const controlLenOffset = 40 +// flagsOffset is the offset form the start of the MessageHeader64 struct +// to the Flags field. +const flagsOffset = 48 + // messageHeader64Len is the length of a MessageHeader64 struct. var messageHeader64Len = uint64(binary.Size(MessageHeader64{})) @@ -743,6 +747,16 @@ func recvSingleMsg(t *kernel.Task, s socket.Socket, msgPtr usermem.Addr, flags i return 0, syserror.ConvertIntr(err.ToError(), kernel.ERESTARTSYS) } cms.Unix.Release() + + if msg.Flags != 0 { + // Copy out the flags to the caller. + // + // TODO: Plumb through actual flags. + if _, err := t.CopyOut(msgPtr+flagsOffset, int32(0)); err != nil { + return 0, err + } + } + return uintptr(n), nil } @@ -787,6 +801,13 @@ func recvSingleMsg(t *kernel.Task, s socket.Socket, msgPtr usermem.Addr, flags i } } + // Copy out the flags to the caller. + // + // TODO: Plumb through actual flags. + if _, err := t.CopyOut(msgPtr+flagsOffset, int32(0)); err != nil { + return 0, err + } + return uintptr(n), nil } |