Function sctp_strreset_timer

freebsd/netinet/sctp_timer.c:1117–1178

}

int
sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
{
	struct sctp_nets *alt, *net;
	struct sctp_tmit_chunk *strrst = NULL, *chk = NULL;

	if (stcb->asoc.stream_reset_outstanding == 0) {
		return (0);
	}
	/* find the existing STRRESET, we use the seq number we sent out on */
	(void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst);
	if (strrst == NULL) {
		return (0);
	}
	net = strrst->whoTo;
	/* do threshold management */
	if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
		/* Assoc is over */
		return (1);
	}
	/*
	 * Cleared threshold management, now lets backoff the address and
	 * select an alternate
	 */
	sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
	alt = sctp_find_alternate_net(stcb, net, 0);
	strrst->whoTo = alt;
	atomic_add_int(&alt->ref_count, 1);

	/* See if a ECN Echo is also stranded */
	TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
		if ((chk->whoTo == net) &&
		    (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
			sctp_free_remote_addr(chk->whoTo);
			if (chk->sent != SCTP_DATAGRAM_RESEND) {
				chk->sent = SCTP_DATAGRAM_RESEND;
				chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
				sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
			}
			chk->whoTo = alt;
			atomic_add_int(&alt->ref_count, 1);
		}
	}
	if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
		/*
		 * If the address went un-reachable, we need to move to
		 * alternates for ALL chk's in queue
		 */
		sctp_move_chunks_from_net(stcb, net);
	}
	sctp_free_remote_addr(net);

	/* mark the retran info */
	if (strrst->sent != SCTP_DATAGRAM_RESEND)
		sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
	strrst->sent = SCTP_DATAGRAM_RESEND;
	strrst->flags |= CHUNK_FLAGS_FRAGMENT_OK;