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Add missing ls_recvdata16 to ZMODEM

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Deon George 2021-07-19 22:15:09 +10:00
parent 001d0a054d
commit ccab973b4a
1 changed files with 76 additions and 0 deletions
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76
app/Classes/Protocol/Zmodem.php
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@ -1066,6 +1066,82 @@ final class Zmodem extends Protocol implements CRCInterface,ZmodemInterface
return $crc32 ? $this->ls_zrecvdata32($data,$len,$timeout) : $this->ls_zrecvdata16($data,$len,$timeout);
}
/**
* Receive data subframe with CRC16, return frame type or error (may be -- timeout)
*
* @return mixed
*/
private function ls_recvdata16(string &$data,int &$len,int $timeout): int
{
if ($this->DEBUG)
Log::debug('+ Start',['m'=>__METHOD__,'d'=>$data]);
$got = 0; /* Bytes total got */
$incrc = self::LSZ_INIT_CRC16; /* Calculated CRC */
$crc = 0; /* Received CRC */
$frametype = self::LSZ_ERROR; /* Type of frame - ZCRC(G|W|Q|E) */
$rcvdata = 1; /* Data is being received NOW (not CRC) */
while ($rcvdata && (($c = $this->ls_readzdle($timeout)) >= 0)) {
if($c < 256) {
$data .= chr($c&0xff);
if (++$got > $this->ls_MaxBlockSize)
return self::LSZ_BADCRC;
$incrc = $this->CRC16USD_UPDATE($c,$incrc);
} else {
switch($c) {
case self::LSZ_CRCE:
case self::LSZ_CRCG:
case self::LSZ_CRCQ:
case self::LSZ_CRCW:
$rcvdata = 0;
$frametype = ($c & 0xff);
$incrc = $this->CRC16USD_UPDATE($c,$incrc);
break;
default:
return self::LSZ_BADCRC;
}
}
}
/* We finish loop by error in ls_readzdle() */
if ($rcvdata) {
Log::error(sprintf('%s: ? Something strange or timeout [%d]',__METHOD__,$rc));
return $c;
}
/* Loops ar unrolled */
if (($c = $this->ls_readzdle($timeout)) < 0)
return $c;
$crc = $c;
if (($c = $this->ls_readzdle($timeout)) < 0)
return $c;
$crc <<= 8;
$crc |= $c;
if ($this->DEBUG)
Log::debug(sprintf('CRC%d got %08x - calculated %08x',16,$incrc,$crc),['m'=>__METHOD__]);
if ($incrc != $crc)
return self::LSZ_BADCRC;
$len = $got;
if ($this->DEBUG)
Log::debug('= End',['m'=>__METHOD__,'frametype'=>$frametype]);
return $frametype;
}
/**
* Receive data subframe with CRC32, return frame type or error (may be -- timeout)
*