void RUDPRecvBuffer::on_timer(uint64_t now_timer, uint32_t rtc)
{
if(check_loss(now_timer, rtc))
{
recv_new_packet_ = false;
}
uint32_t rtc_threshold = core_min(20, rtc / 2);
if(last_ack_ts_ + rtc_threshold <= now_timer && recv_new_packet_)
{
net_channel_->send_ack(first_seq_);
set_send_last_ack_ts(now_timer);
}
//判断是否可以读
if(!recv_data_.empty() && net_channel_ != NULL)
net_channel_->on_read();
}
STATIC int
test_mod(test_pars_t *tp, pdu_t *pdu, iscsi_pdu_kind_t kind, int rxtx, int err)
{
mod_desc_t *mod;
uint32_t mpoff, off;
int i, rc = 0, s;
tp->pdu_count[kind][rxtx]++;
tp->pdu_count[ANY_PDU][rxtx]++;
do {
if ((mod = TAILQ_FIRST(&tp->mods)) == NULL) {
return check_loss(tp, rxtx);
}
if (mod->pars.which_pdu != ANY_PDU &&
mod->pars.which_pdu != kind) {
return check_loss(tp, rxtx);
}
mpoff = mod->pars.pdu_offset;
switch (mod->pars.which_offset) {
case ABSOLUTE_ANY:
off = tp->pdu_count[ANY_PDU][CNT_TX] +
tp->pdu_count[ANY_PDU][CNT_RX];
break;
case RELATIVE_ANY:
off = (tp->pdu_count[ANY_PDU][CNT_TX] +
tp->pdu_count[ANY_PDU][CNT_RX]) -
(tp->pdu_last[ANY_PDU][CNT_TX] + tp->pdu_last[ANY_PDU][CNT_RX]);
break;
case ABSOLUTE_PDUKIND:
off = tp->pdu_count[kind][rxtx];
break;
case RELATIVE_PDUKIND:
off = tp->pdu_count[kind][rxtx] - tp->pdu_last[kind][rxtx];
break;
case ABSOLUTE_TX:
if (rxtx != CNT_TX)
return check_loss(tp, rxtx);
off = tp->pdu_count[ANY_PDU][CNT_TX];
break;
case RELATIVE_TX:
if (rxtx != CNT_TX)
return check_loss(tp, rxtx);
off = tp->pdu_count[ANY_PDU][CNT_TX] -
tp->pdu_last[ANY_PDU][CNT_TX];
break;
case ABSOLUTE_RX:
if (rxtx != CNT_RX)
return check_loss(tp, rxtx);
off = tp->pdu_count[ANY_PDU][CNT_RX];
break;
case RELATIVE_RX:
if (rxtx != CNT_RX)
return check_loss(tp, rxtx);
off = tp->pdu_count[ANY_PDU][CNT_RX] -
tp->pdu_last[ANY_PDU][CNT_RX];
break;
default:
/* bad offset - skip this entry */
mpoff = off = 0;
break;
}
DEB(1, ("test_mod: kind=%d, rxtx=%d, pdukind=%d, mpoff=%d, "
"whichoff=%d, off=%d\n", kind, rxtx, mod->pars.which_pdu,
mpoff, mod->pars.which_offset, off));
if (!off || (mpoff != 0 && mpoff < off)) {
/* This might happen in some cases. Just discard the modification. */
s = splbio();
TAILQ_REMOVE(&tp->mods, mod, link);
splx(s);
update_options(tp, mod);
if (mod->pars.options & ISCSITEST_OPT_WAIT_FOR_COMPLETION) {
mod->pars.status = ISCSI_STATUS_TEST_MODIFICATION_SKIPPED;
wakeup(mod);
}
free(mod, M_TEMP);
}
} while (mpoff && mpoff < off);
if (mpoff > off)
return check_loss(tp, rxtx);
DEB(1, ("test_mod: opt=%x, pdu_ptr=%x, num_mods=%d\n", mod->pars.options,
(int) mod->pdu_ptr, mod->pars.num_pdu_mods));
if (mod->pdu_ptr)
test_get(pdu, mod, err);
if (mod->pars.options & ISCSITEST_OPT_DISCARD_PDU)
rc = 1;
else if (check_loss(tp, rxtx))
rc = 1;
else if (mod->pars.num_pdu_mods) {
if (!(mod->pars.options & ISCSITEST_OPT_MOD_PERMANENT)) {
/*
* Note: if the PDU is later resent, the unmodified one will be
* used as resend_pdu restores the original io vector.
*/
pdu->mod_pdu = pdu->pdu;
pdu->io_vec[0].iov_base = &pdu->mod_pdu;
}
for (i = 0; i < mod->pars.num_pdu_mods; i++) {
mod_pdu(pdu, &mod->mods[i]);
}
}
if (rxtx == CNT_TX) {
if (mod->pars.options & ISCSITEST_OPT_NO_RESPONSE_PDU) {
ccb_t *ccb = pdu->owner;
DEB(1, ("test_mod: No response expected, completing CCB %x\n",
(int)ccb));
if (ccb != NULL &&
(ccb->disp == CCBDISP_WAIT || ccb->disp == CCBDISP_SCSIPI)) {
/* simulate timeout */
wake_ccb(ccb, ISCSI_STATUS_TIMEOUT);
}
}
if ((mod->pars.options & ISCSITEST_SFLAG_UPDATE_FIELDS) &&
mod->pars.num_pdu_mods) {
connection_t *conn = pdu->connection;
if (conn->HeaderDigest &&
!(mod->pars.options & ISCSITEST_SFLAG_NO_HEADER_DIGEST))
pdu->pdu.HeaderDigest = gen_digest(&pdu->pdu, BHS_SIZE);
if (pdu->uio.uio_iovcnt > 1 && conn->DataDigest &&
!(mod->pars.options & ISCSITEST_SFLAG_NO_DATA_DIGEST))
pdu->data_digest = gen_digest_2(
pdu->io_vec[1].iov_base,
pdu->io_vec[1].iov_len,
pdu->io_vec[2].iov_base,
pdu->io_vec[2].iov_len);
}
}
s = splbio();
TAILQ_REMOVE(&tp->mods, mod, link);
update_options(tp, mod);
/* we've modified a PDU - copy current count into last count */
memcpy(tp->pdu_last, tp->pdu_count, sizeof(tp->pdu_last));
splx(s);
if (mod->pars.options & ISCSITEST_OPT_WAIT_FOR_COMPLETION) {
wakeup(mod);
}
if (mod->pars.options & ISCSITEST_KILL_CONNECTION) {
kill_connection(tp->connection,
ISCSI_STATUS_TEST_CONNECTION_CLOSED,
NO_LOGOUT, TRUE);
}
free(mod, M_TEMP);
return rc;
}
