Function sctp_abort

freebsd/netinet/sctp_usrreq.c:414–458

#ifdef INET
static void
sctp_abort(struct socket *so)
{
	struct epoch_tracker et;
	struct sctp_inpcb *inp;
	uint32_t flags;

	inp = (struct sctp_inpcb *)so->so_pcb;
	if (inp == NULL) {
		return;
	}

	NET_EPOCH_ENTER(et);
sctp_must_try_again:
	flags = inp->sctp_flags;
#ifdef SCTP_LOG_CLOSING
	sctp_log_closing(inp, NULL, 17);
#endif
	if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
	    (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
#ifdef SCTP_LOG_CLOSING
		sctp_log_closing(inp, NULL, 16);
#endif
		sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
		    SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
		SOCK_LOCK(so);
		SCTP_SB_CLEAR(so->so_snd);
		/*
		 * same for the rcv ones, they are only here for the
		 * accounting/select.
		 */
		SCTP_SB_CLEAR(so->so_rcv);

		/* Now null out the reference, we are completely detached. */
		so->so_pcb = NULL;
		SOCK_UNLOCK(so);
	} else {
		flags = inp->sctp_flags;
		if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
			goto sctp_must_try_again;
		}
	}
	NET_EPOCH_EXIT(et);
	return;
}

static int
sctp_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)