Function sopeeloff

freebsd/kern/uipc_socket.c:801–852

* Socket part of sctp_peeloff(). Detach a new socket from an * association. The new socket is returned with a reference. */

 * association.  The new socket is returned with a reference.
 */
struct socket *
sopeeloff(struct socket *head)
{
	struct socket *so;

	VNET_ASSERT(head->so_vnet != NULL, ("%s:%d so_vnet is NULL, head=%p",
	    __func__, __LINE__, head));
	so = soalloc(head->so_vnet);
	if (so == NULL) {
		log(LOG_DEBUG, "%s: pcb %p: New socket allocation failure: "
		    "limit reached or out of memory\n",
		    __func__, head->so_pcb);
		return (NULL);
	}
	so->so_type = head->so_type;
	so->so_options = head->so_options;
	so->so_linger = head->so_linger;
	so->so_state = (head->so_state & SS_NBIO) | SS_ISCONNECTED;
	so->so_fibnum = head->so_fibnum;
	so->so_proto = head->so_proto;
	so->so_cred = crhold(head->so_cred);
#ifdef MAC
	mac_socket_newconn(head, so);
#endif
	knlist_init(&so->so_rdsel.si_note, so, so_rdknl_lock, so_rdknl_unlock,
	    so_rdknl_assert_lock);
	knlist_init(&so->so_wrsel.si_note, so, so_wrknl_lock, so_wrknl_unlock,
	    so_wrknl_assert_lock);
	VNET_SO_ASSERT(head);
	if (soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat)) {
		sodealloc(so);
		log(LOG_DEBUG, "%s: pcb %p: soreserve() failed\n",
		    __func__, head->so_pcb);
		return (NULL);
	}
	if ((*so->so_proto->pr_usrreqs->pru_attach)(so, 0, NULL)) {
		sodealloc(so);
		log(LOG_DEBUG, "%s: pcb %p: pru_attach() failed\n",
		    __func__, head->so_pcb);
		return (NULL);
	}
	so->so_rcv.sb_lowat = head->so_rcv.sb_lowat;
	so->so_snd.sb_lowat = head->so_snd.sb_lowat;
	so->so_rcv.sb_timeo = head->so_rcv.sb_timeo;
	so->so_snd.sb_timeo = head->so_snd.sb_timeo;
	so->so_rcv.sb_flags |= head->so_rcv.sb_flags & SB_AUTOSIZE;
	so->so_snd.sb_flags |= head->so_snd.sb_flags & SB_AUTOSIZE;

	soref(so);

	return (so);
}
#endif	/* SCTP */

int