Function sctp_timeout_handler

freebsd/netinet/sctputil.c:1703–2112

 */

void
sctp_timeout_handler(void *t)
{
	struct epoch_tracker et;
	struct timeval tv;
	struct sctp_inpcb *inp;
	struct sctp_tcb *stcb;
	struct sctp_nets *net;
	struct sctp_timer *tmr;
	struct mbuf *op_err;
	int type;
	int i, secret;
	bool did_output, released_asoc_reference;

	/*
	 * If inp, stcb or net are not NULL, then references to these were
	 * added when the timer was started, and must be released before
	 * this function returns.
	 */
	tmr = (struct sctp_timer *)t;
	inp = (struct sctp_inpcb *)tmr->ep;
	stcb = (struct sctp_tcb *)tmr->tcb;
	net = (struct sctp_nets *)tmr->net;
	CURVNET_SET((struct vnet *)tmr->vnet);
	NET_EPOCH_ENTER(et);
	released_asoc_reference = false;

#ifdef SCTP_AUDITING_ENABLED
	sctp_audit_log(0xF0, (uint8_t)tmr->type);
	sctp_auditing(3, inp, stcb, net);
#endif

	/* sanity checks... */
	KASSERT(tmr->self == NULL || tmr->self == tmr,
	    ("sctp_timeout_handler: tmr->self corrupted"));
	KASSERT(SCTP_IS_TIMER_TYPE_VALID(tmr->type),
	    ("sctp_timeout_handler: invalid timer type %d", tmr->type));
	type = tmr->type;
	KASSERT(stcb == NULL || stcb->sctp_ep == inp,
	    ("sctp_timeout_handler of type %d: inp = %p, stcb->sctp_ep %p",
	    type, stcb, stcb->sctp_ep));
	tmr->stopped_from = 0xa001;
	if ((stcb != NULL) && (stcb->asoc.state == SCTP_STATE_EMPTY)) {
		SCTPDBG(SCTP_DEBUG_TIMER2,
		    "Timer type %d handler exiting due to CLOSED association.\n",
		    type);
		goto out_decr;
	}
	tmr->stopped_from = 0xa002;
	SCTPDBG(SCTP_DEBUG_TIMER2, "Timer type %d goes off.\n", type);
	if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
		SCTPDBG(SCTP_DEBUG_TIMER2,
		    "Timer type %d handler exiting due to not being active.\n",
		    type);
		goto out_decr;
	}

	tmr->stopped_from = 0xa003;