/**
* Forms PDU.
* @access public
* @param int $cmd Command id
* @param array $pars Parameters
* @return string PDU
*/
public function form_pdu($cmd, $pars = array())
{
$pdu = null;
switch ($cmd) {
case BIND_TX:
case BIND_RX:
$pdu = pack('a' . (strlen($this->login) + 1) . 'a' . (strlen($this->pass) + 1) . 'a' . (strlen($this->system_type) + 1) . 'CCCa' . (strlen($this->address_range) + 1), $this->login, $this->pass, $this->system_type, 0x34, $this->addr_ton, $this->addr_npi, $this->address_range);
$this->sqn++;
break;
case SUBMIT_SM:
$pdu = pack('a' . (strlen($pars['stype']) + 1) . 'CCa' . (strlen($pars['src']) + 1) . 'CCa' . (strlen($pars['dst']) + 1) . 'CCCa' . (strlen($pars['sdt']) + 1) . 'a' . (strlen($pars['valid']) + 1) . 'CCCCC', $pars['stype'], $pars['st'], $pars['sn'], $pars['src'], $pars['dt'], $pars['dn'], $pars['dst'], $pars['esm'], $pars['proto'], $pars['prior'], $pars['sdt'], $pars['valid'], $pars['deliv'], $pars['repl'], $pars['dc'], $pars['msgid'], strlen($pars['text'])) . $pars['text'];
break;
case ENQUIRELINK:
case UNBIND:
$this->sqn++;
break;
case DELIVER_SM | ACK:
$pdu = pack('a2', '0');
break;
}
if (isset($pars['sqn'])) {
$sqn = $pars['sqn'];
} else {
$sqn = $this->sqn;
}
return NIMF_esme::form_pdu_header($cmd, strlen($pdu), $sqn) . $pdu;
}
