Esempio n. 1
0
static void rtt_tick(void *opaque)
{
    rtt_state *s = opaque;

    s->vr++;
    s->sr |= SR_RTTINC;
    rtt_update(s);
}
Esempio n. 2
0
static void rtt_write(void *opaque, hwaddr offset,
                        uint64_t value, unsigned size)
{
    rtt_state *s = (rtt_state *)opaque;

    switch (offset) {
    case 0x00: // MR
        s->mr = value;
	rtt_update(s);
        break;
    case 0x04: // AR
        s->ar = value;
	rtt_update(s);
        break;
    default:
        qemu_log_mask(LOG_GUEST_ERROR,
                      "rtt_write: Bad offset %x\n", (int)offset);
    }
}
Esempio n. 3
0
int 
infra_rtt_update(struct infra_cache* infra, struct sockaddr_storage* addr,
	socklen_t addrlen, uint8_t* nm, size_t nmlen, int qtype,
	int roundtrip, int orig_rtt, time_t timenow)
{
	struct lruhash_entry* e = infra_lookup_nottl(infra, addr, addrlen,
		nm, nmlen, 1);
	struct infra_data* data;
	int needtoinsert = 0;
	int rto = 1;
	if(!e) {
		if(!(e = new_entry(infra, addr, addrlen, nm, nmlen, timenow)))
			return 0;
		needtoinsert = 1;
	} else if(((struct infra_data*)e->data)->ttl < timenow) {
		data_entry_init(infra, e, timenow);
	}
	/* have an entry, update the rtt */
	data = (struct infra_data*)e->data;
	if(roundtrip == -1) {
		rtt_lost(&data->rtt, orig_rtt);
		if(qtype == LDNS_RR_TYPE_A) {
			if(data->timeout_A < TIMEOUT_COUNT_MAX)
				data->timeout_A++;
		} else if(qtype == LDNS_RR_TYPE_AAAA) {
			if(data->timeout_AAAA < TIMEOUT_COUNT_MAX)
				data->timeout_AAAA++;
		} else {
			if(data->timeout_other < TIMEOUT_COUNT_MAX)
				data->timeout_other++;
		}
	} else {
		/* if we got a reply, but the old timeout was above server
		 * selection height, delete the timeout so the server is
		 * fully available again */
		if(rtt_unclamped(&data->rtt) >= USEFUL_SERVER_TOP_TIMEOUT)
			rtt_init(&data->rtt);
		rtt_update(&data->rtt, roundtrip);
		data->probedelay = 0;
		if(qtype == LDNS_RR_TYPE_A)
			data->timeout_A = 0;
		else if(qtype == LDNS_RR_TYPE_AAAA)
			data->timeout_AAAA = 0;
		else	data->timeout_other = 0;
	}
	if(data->rtt.rto > 0)
		rto = data->rtt.rto;

	if(needtoinsert)
		slabhash_insert(infra->hosts, e->hash, e, e->data, NULL);
	else 	{ lock_rw_unlock(&e->lock); }
	return rto;
}