MSG_DONTROUTE
if (flags & (MSG_CONFIRM|MSG_DONTROUTE|MSG_EOR|MSG_OOB))
msg->msg_flags & MSG_DONTROUTE ||
*pflags |= MSG_DONTROUTE;
skcb->msg_flags &= ~(MSG_DONTROUTE);
skcb->msg_flags |= MSG_DONTROUTE;
*pflags |= MSG_DONTROUTE;