rtm_errno         180 net/route.h    	int	rtm_errno;	/* why failed */
rtm_errno         446 net/rtsock.c   			rtm->rtm_errno = error;
rtm_errno         670 net/rtsock.c   	rtm->rtm_errno = error;
rtm_errno         765 net/rtsock.c   			rtm->rtm_errno = error;
rtm_errno         848 net/rtsock.c   		rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;