clrghouz/app/Classes/Protocol/Zmodem.php

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<?php
namespace App\Classes\Protocol;
use Illuminate\Support\Facades\Log;
use League\Flysystem\UnreadableFileException;
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use App\Classes\Protocol;
use App\Classes\Protocol\Zmodem as ZmodemClass;
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use App\Classes\File\{Receive,Send};
use App\Classes\Sock\{SocketClient,SocketException};
use App\Interfaces\CRC as CRCInterface;
use App\Interfaces\Zmodem as ZmodemInterface;
use App\Traits\CRC as CRCTrait;
final class Zmodem extends Protocol implements CRCInterface,ZmodemInterface
{
use CRCTrait;
/* ZModem constants */
private const LSZ_MAXHLEN = 16; /* Max header information length NEVER CHANGE */
private const LSZ_MAXATTNLEN = 32; /* Max length of Attn string */
private const LSZ_MAXFRAME = self::ZSTDERR;
private const LSZ_WINDOW = 1024;
private const LSZ_BLOCKSIZE = 1024;
/* Special characters */
private const ZPAD = 0x2a; //* /* 052 Padding character begins frames */
private const ZDLE = 0x18; /* Ctrl-X ZmodemReceive escape - `ala BISYNC DLE */
private const ZDLEE = (self::ZDLE^0x40); /* Escaped ZDLE as transmitted */
private const ZDEL = 0x7f; /* DEL character */
private const ZBIN = 0x41; //A /* Binary frame indicator (CRC-16) */
private const ZHEX = 0x42; //B /* HEX frame indicator */
private const ZBIN32 = 0x43; //C /* Binary frame with 32 bit FCS */
private const ZBINR32 = 0x44; //D /* RLE packed Binary frame with 32 bit FCS */
private const ZVBIN = 0x61; //a /* Binary frame indicator (CRC-16) and v.header */
private const ZVHEX = 0x62; //b /* HEX frame indicator and v.header */
private const ZVBIN32 = 0x63; //c /* Binary frame with 32 bit FCS and v.header */
private const ZVBINR32 = 0x64; //d /* RLE packed Binary frame with 32 bit FCS and v.header */
private const ZRESC = 0x7e; /* RLE flag/escape character */
private const ZRQINIT = 0; /* Request receive init */
private const ZRINIT = 1; /* Receive init */
private const ZSINIT = 2; /* Send init sequence (optional) */
private const ZACK = 3; /* ACK to above */
private const ZFILE = 4; /* File name from sender */
public const ZSKIP = 5; /* To sender: skip this file */
private const ZNAK = 6; /* Last packet was garbled */
private const ZABORT = 7; /* Abort batch transfers */
private const ZFIN = 8; /* Finish session */
private const ZRPOS = 9; /* Resume data trans at this position */
private const ZDATA = 10; /* Data packet(s) follow */
private const ZEOF = 11; /* End of file */
public const ZFERR = 12; /* Fatal Read or Write error Detected (we use for refuse -- suspend) */
private const ZCRC = 13; /* Request for file CRC and response */
private const ZCHALLENGE = 14; /* Receiver's Challenge */
private const ZCOMPL = 15; /* Request is complete */
private const ZCAN = 16; /* Other end canned session with CAN*5 */
private const ZFREECNT = 17; /* Request for free bytes on filesystem (OK, we always send unlimited) */
private const ZCOMMAND = 18; /* Command from sending program (NOT SUPPORTED!) */
private const ZSTDERR = 19; /* Output to standard error, data follows (NOT SUPPORTED!) */
private const ZCRCE = 0x68; //h /* CRC next, frame ends, header packet follows */
private const ZCRCG = 0x69; //i /* CRC next, frame continues nonstop */
private const ZCRCQ = 0x6a; //j /* CRC next, frame continues, ZACK expected */
private const ZCRCW = 0x6b; //k /* CRC next, ZACK expected, end of frame */
private const ZRUB0 = 0x6c; //l /* Translate to rubout 0177 */
private const ZRUB1 = 0x6d; //m /* Translate to rubout 0377 */
/* Return codes -- pseudo-characters */
private const LSZ_OK = self::OK; /* 0 */
private const LSZ_TIMEOUT = self::TIMEOUT; /* -2 */
private const LSZ_RCDO = self::RCDO; /* -3 */
private const LSZ_CAN = self::GCOUNT; /* -4 */
private const LSZ_ERROR = self::ERROR; /* -5 */
private const LSZ_NOHEADER = -6;
private const LSZ_BADCRC = -7;
private const LSZ_XONXOFF = -8;
private const LSZ_CRCE = (self::ZCRCE|0x0100);
private const LSZ_CRCG = (self::ZCRCG|0x0100);
private const LSZ_CRCQ = (self::ZCRCQ|0x0100);
private const LSZ_CRCW = (self::ZCRCW|0x0100);
/* Dirty hack */
private const LSZ_TRUSTZFINS = 3; /* We trust only in MANY ZFINs during initialization */
/* Byte positions within header array */
private const LSZ_F0 = 3; /* First flags byte */
private const LSZ_F1 = 2;
private const LSZ_F2 = 1;
private const LSZ_F3 = 0;
private const LSZ_P0 = 0; /* Low order 8 bits of position */
private const LSZ_P1 = 1;
private const LSZ_P2 = 2;
private const LSZ_P3 = 3; /* High order 8 bits of file position */
/* different protocol variations */
private const LSZ_OPTZEDZAP = 0x00000001; /* We could big blocks, ZModem variant (ZedZap) */
private const LSZ_OPTDIRZAP = 0x00000002; /* We escape nothing, ZModem variant (DirZap) */
private const LSZ_OPTESCAPEALL = 0x00000004; /* We must escape ALL contorlo characters */
private const LSZ_OPTCRC32 = 0x00000008; /* We must send CRC 32 */
private const LSZ_OPTVHDR = 0x00000010; /* We must send variable headers */
private const LSZ_OPTRLE = 0x00000020; /* We must send RLEd data (NOT SUPPORTED)! */
private const LSZ_OPTESC8 = 0x00000040; /* We must escape all 8-bit data (NOT SUPPORTED!) */
private const LSZ_OPTSKIPGUARD = 0x00000080; /* We use double-skip guard */
private const LSZ_OPTFIRSTBATCH = 0x00000100; /* It is first batch -- trust in first ZFIN */
/* Peer's capabilities from ZRINIT header */
private const LSZ_RXCANDUPLEX = 0x0001; /* Receiver can send and receive true FDX */
private const LSZ_RXCANOVIO = 0x0002; /* Receiver can receive data during disk I/O */
private const LSZ_RXCANBRK = 0x0004; /* Receiver can send a break signal */
private const LSZ_RXCANRLE = 0x0008; /* Receiver can decode RLE */
private const LSZ_RXCANLZW = 0x0010; /* Receiver can uncompress LZW */
private const LSZ_RXCANFC32 = 0x0020; /* Receiver can use 32 bit Frame Check */
private const LSZ_RXWNTESCCTL = 0x0040; /* Receiver expects ctl chars to be escaped */
private const LSZ_RXWNTESC8 = 0x0080; /* Receiver expects 8th bit to be escaped */
private const LSZ_RXCANVHDR = 0x0100; /* Receiver can variable headers */
/* Conversion options (ZF0 in ZFILE frame) */
private const LSZ_CONVBIN = 1; /* Binary transfer - inhibit conversion */
private const LSZ_CONVCNL = 2; /* Convert NL to local end of line convention */
private const LSZ_CONVRECOV = 3; /* Resume interrupted file transfer -- binary */
/* Read Mode */
private const rm8BIT = 0;
private const rm7BIT = 1;
private const rmZDLE = 2;
private const rmHEX = 3;
/* State */
private const rhInit = 0;
private const rhZPAD = 1;
private const rhXON = 2;
private const rhLF = 3;
private const rhCR = 4;
private const rhCRC = 5;
private const rhBYTE = 6;
private const rhFrameType = 7;
private const rhZHEX = 8;
private const rhZBIN = 9;
private const rhZBIN32 = 10;
private const rhZVHEX = 11;
private const rhZVBIN = 12;
private const rhZVBIN32 = 13;
private const rhZDLE = 14;
private const sfSlidingWindow = 0; /* Window requested, could do fullduplex (use stream with ZCRCQ and sliding window) */
private const sfStream = 1; /* No window requested (use ZCRCG) */
private const sfBuffered = 2; /* Window requested, couldn't use fullduplex (use frames ZCRCG + ZCRCW) */
private int $ls_GotZDLE = 0; /* We seen DLE as last character */
private int $ls_GotHexNibble = 0; /* We seen one hex digit as last character */
private int $ls_Protocol; /* Plain/ZedZap/DirZap and other options */
private int $ls_CANCount = 0; /* Count of CANs to go */
private int $ls_SerialNum = 0; /* Serial number of file -- for Double-skip protection */
private int $ls_DataTimeout; /* Timeout for data blocks */
private int $ls_HeaderTimeout; /* Timeout for headers */
private int $ls_MaxBlockSize = 8192; /* Maximum block size */
/* Special table to FAST calculate header type */
/* CRC32,VAR,RLE */
private const HEADER_TYPE = [[[self::ZBIN,-1],[self::ZVBIN,-1]],[[self::ZBIN32,self::ZBINR32],[self::ZVBIN32,self::ZVBINR32]]];
/* Variables to control sender */
private array $ls_rxHdr = []; /* Receiver header */
private int $ls_rxCould = 0; /* Receiver could fullduplex/streamed IO (from ZRINIT) */
private int $ls_txWinSize = 0; /* Receiver Window/Buffer size (0 for streaming) */
private int $ls_txCurBlockSize; /* Current block size */
private int $ls_txLastSent; /* Last sent character -- for escaping */
private int $ls_txLastACK = 0; /* Last ACKed byte */
private int $ls_txLastRepos = 0; /* Last requested byte */
private int $ls_txReposCount = 0; /* Count of REPOSes on one position */
private int $ls_txGoodBlocks = 0; /* Good blocks sent */
private const NUL = 0x00;
private const ACK = 0x06;
private const BEL = 0x07;
private const BS = 0x08;
private const HT = 0x09;
private const LF = 0x0a;
private const VT = 0x0b;
private const CR = 0x0d;
private const DLE = 0x10;
private const XON = 0x11; //(81&037); 'Q'
private const XOFF = 0x13; //(83&037); 'S'
private const CAN = 0x18;
private const ESC = 0x1b;
private const RX_SKIP = 1;
private const RX_SUSPEND = 2;
private string $rxbuf = '';
private string $txbuf = '';
/**
* @param SocketClient $client
* @return null
* @throws SocketException
*/
public function onConnect(SocketClient $client): ?int
{
// If our parent returns a PID, we've forked
if (! parent::onConnect($client)) {
$this->session(self::SESSION_ZMODEM,$client);
$this->client->close();
Log::info(sprintf('%s: = End - Connection closed [%s]',__METHOD__,$client->getAddress()));
}
return NULL;
}
/**
* Initialise our session
*/
private function init(SocketClient $client,int $canzap): void
{
$this->client = $client;
/* Set all options to requested state -- this may be alerted by other side in ZSINIT */
$this->ls_Protocol = self::LSZ_OPTCRC32|self::LSZ_OPTSKIPGUARD;
switch ($canzap&0xff) {
case 2:
$this->ls_Protocol |= self::LSZ_OPTDIRZAP;
/* FALL THROUGH */
case 1:
$this->ls_Protocol |= self::LSZ_OPTZEDZAP;
/* FALL THROUGH */
case 0:
break;
default:
Log::error(sprintf('%s: ! Strange cancap [%d]',__METHOD__,$canzap));
}
/* Maximum block size -- by protocol, may be reduced by window size later */
$this->ls_MaxBlockSize = ($this->ls_Protocol&self::LSZ_OPTZEDZAP) ? 8192 : 1024;
/* Calculate timeouts */
/* Timeout for header waiting, if no data sent -- 3*TransferTime or 10 seconds */
$this->ls_HeaderTimeout = (self::LSZ_MAXHLEN * 30) / $this->client->speed;
$this->ls_HeaderTimeout = ($this->ls_HeaderTimeout > 10) ? $this->ls_HeaderTimeout : 10;
/* Timeout for data packet (3*TransferTime or 60 seconds) */
$this->ls_DataTimeout = ($this->ls_MaxBlockSize * 30) / $this->client->speed;
$this->ls_DataTimeout = ($this->ls_DataTimeout > 60) ? $this->ls_DataTimeout : 60;
$this->ls_SkipGuard = ($this->ls_Protocol&self::LSZ_OPTSKIPGUARD) ? 1 : 0;
}
public function protocol_init(): int
{
// Not used
}
/**
* Setup our ZMODEM session
*
* @return int
* @throws \Exception
*/
public function protocol_session(): int
{
$proto = $this->originate ? $this->node->optionGet(self::P_MASK) : $this->optionGet(self::P_MASK);
if ($this->originate) {
if (! $z->zmodem_sendinit($this->client,$proto) && $this->send->total_count)
$this->zmodem_sendfile($this->send);
$rc = $this->zmodem_senddone();
} else {
$rc = $this->zmodem_receive($this->client,$proto,$this->recv,'.');
}
return $rc;
}
/**
* Receive files via Zmodem
*
* @param SocketClient $client
* @param Receive $recv
* @param string $dir
* @param int $canzap
* @return int
*/
public function zmodem_receive(SocketClient $client,int $canzap,Receive $recv,string $dir): int
{
Log::debug(sprintf('%s: + Start [%d] into dir [%s]',__METHOD__,$canzap,$dir));
$opts = $this->init($client,$canzap);
$this->ls_txWinSize = self::LSZ_WINDOW;
$this->recv = $recv;
if ($canzap&0x0100)
$opts |= self::LSZ_OPTFIRSTBATCH;
switch ($rc=$this->ls_zrecvfinfo(self::ZRINIT,($this->ls_Protocol&self::LSZ_OPTFIRSTBATCH) ? 1 : 0)) {
case self::ZFIN:
Log::debug(sprintf('%s: = ZFIN after INIT, empty batch',__METHOD__));
$this->ls_zdonereceiver();
return self::LSZ_OK;
case self::ZFILE:
Log::debug(sprintf('%s: = ZFILE after INIT',__METHOD__));
break;
default:
Log::error(sprintf('%s: ! Something strange after init [%d]',__METHOD__,$rc));
$this->ls_zabort();
$this->ls_zdonereceiver();
return self::LSZ_ERROR;
}
while (TRUE) {
switch ($rc) {
case self::ZFIN:
Log::debug(sprintf('%s: = ZFIN',__METHOD__));
$this->ls_zdonereceiver();
return self::LSZ_OK;
case self::ZFILE:
if (! $this->recv->to_get) {
Log::error(sprintf('%s: ! No files to get?',__METHOD__));
$frame = self::ZSKIP;
} else {
switch ($this->recv->open()) {
case self::FOP_SKIP:
Log::info(sprintf('%s: = Skip this file [%s]',__METHOD__,$this->recv->name));
$frame = self::ZSKIP;
break;
case self::FOP_SUSPEND:
Log::info(sprintf('%s: = Suspend this file [%s]',__METHOD__,$this->recv->name));
$frame = self::ZFERR;
break;
case self::FOP_CONT:
case self::FOP_OK:
Log::info(sprintf('%s: = Receving [%s] from [%d]',__METHOD__,$this->recv->name,$this->recv->filepos));
$frame = self::ZRINIT;
switch (($rc=$this->ls_zrecvfile($recv->filepos))) {
case self::ZFERR:
Log::debug(sprintf('%s: = ZFERR',__METHOD__));
$this->recv->close();
$frame = self::ZFERR;
break;
case self::ZSKIP:
Log::debug(sprintf('%s: = ZSKIP',__METHOD__));
$this->recv->close();
$frame = self::ZSKIP;
break;
case self::LSZ_OK:
Log::debug(sprintf('%s: = OK',__METHOD__));
$this->recv->close();
break;
default:
Log::error(sprintf('%s: ! OTHER [%d]',__METHOD__,$rc));
$this->recv->close();
return self::LSZ_ERROR;
}
break;
}
}
break;
case self::ZABORT:
Log::debug(sprintf('%s: = ZABORT',__METHOD__));
$this->ls_zabort();
$this->ls_zdonereceiver();
return self::LSZ_ERROR;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
$this->ls_zabort();
$this->ls_zdonereceiver();
return self::LSZ_ERROR;
}
$rc = $this->ls_zrecvfinfo($frame,1);
}
return self::LSZ_OK;
}
/**
* Done sender -- good way
*
* @return int
* @throws \Exception
*/
public function zmodem_senddone():int
{
$trys = 0;
$retransmit = 1;
$this->txbuf = '';
do {
if ($retransmit) {
if (($rc=$this->ls_zsendhhdr(self::ZFIN,$this->ls_storelong(0))) < 0)
return $rc;
$trys++;
$retransmit = 0;
}
switch (($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$this->ls_HeaderTimeout))) {
/* Ok, GOOD */
case self::ZFIN:
$this->client->buffer_add('OO');
$this->client->buffer_flush(5);
return self::LSZ_OK;
case self::ZNAK:
case self::LSZ_TIMEOUT:
$retransmit = 1;
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
$retransmit = 1;
}
} while ($trys < 10);
Log::error(sprintf('%s: ? Something strange or timeeout [%d]',__METHOD__,$rc));
return $rc;
}
/**
* Init sending -- wrapper
*
* @param SocketClient $client
* @param int $canzap
* @return int
*/
public function zmodem_sendinit(SocketClient $client,int $canzap): int
{
Log::debug(sprintf('%s: + Start [%d]',__METHOD__,$canzap));
$this->init($client,$canzap);
if (($rc=$this->ls_zinitsender(self::LSZ_WINDOW,'')) < 0)
return $rc;
Log::debug(sprintf('%s: ZMODEM Link Options %d/%d, %s%s%s%s',
__METHOD__,
$this->ls_MaxBlockSize,
$this->ls_txWinSize,
($this->ls_Protocol&self::LSZ_OPTCRC32) ? 'CRC32' : 'CRC16',
($this->ls_rxCould&self::LSZ_RXCANDUPLEX) ? ',DUPLEX' : '',
($this->ls_Protocol&self::LSZ_OPTVHDR) ? ',VHEADER' : '',
($this->ls_Protocol&self::LSZ_OPTESCAPEALL) ? ',ESCALL' : ''
));
Log::debug(sprintf('%s: = End [%x]',__METHOD__,$rc));
return $rc;
}
/**
* Send a file with the Zmodem Protocol
*
* @param Send $send
* @return int
*/
public function zmodem_sendfile(Send $send): int
{
Log::debug(sprintf('%s: + Start',__METHOD__));
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while ($send->total_count && $send->open()) {
try {
$rc = $this->ls_zsendfile($send,$this->ls_SerialNum++,$send->total_count,$send->total_size);
switch ($rc) {
case self::LSZ_OK:
$send->close(TRUE);
break;
case self::ZSKIP:
case self::ZFERR:
$send->close(FALSE);
break;
default:
$send->close(FALSE);
$this->ls_zabort();
break;
}
return $rc;
} catch (\Exception $e) {
Log::error(sprintf('%s: ! Error [%s]',__METHOD__,$e->getMessage()));
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}
}
return self::OK;
}
/**
* Fetch long integer (4 bytes) from buffer, as it must be stored in header
*
* @param array $buf
* @return int
*/
private function ls_fetchlong(array $buf): int
{
$l = $buf[self::LSZ_P3];
$l<<=8;
$l |= $buf[self::LSZ_P2];
$l<<=8;
$l |= $buf[self::LSZ_P1];
$l<<=8;
$l |= $buf[self::LSZ_P0];
return $l;
}
/**
* Return 7bit character, strip XON/XOFF if not DirZap, with timeout
*
* @param int $timeout
* @return int
* @throws SocketException
*/
private function ls_read7bit(int $timeout): int
{
$this->ls_CANCount = 0;
do {
if (($c = $this->client->read_ch($timeout)) < 0)
return $c;
} while ((! ($this->ls_Protocol&self::LSZ_OPTDIRZAP)) && (($c == self::XON) || ($c == self::XOFF)));
if ($c == self::CAN) {
if (++$this->ls_CANCount == 5)
return self::LSZ_CAN;
} else {
$this->ls_CANCount = 0;
}
if (ord($c) == 0)
return self::LSZ_ERROR;
return $c&0x7f;
}
/**
* Read one character, check for five CANs
*
* @param int $timeout
* @return int
*/
private function ls_readcanned(int $timeout): int
{
if (($ch = $this->client->read_ch($timeout)) < 0)
return $ch;
if ($ch == self::CAN) {
if (++$this->ls_CANCount == 5)
return self::LSZ_CAN;
} else {
$this->ls_CANCount = 0;
}
return $ch&0xff;
}
/**
* Read character as two hex digit
*
* @param int $timeout
* @return int
*/
private function ls_readhex(int $timeout): int
{
static $c = 0;
if (! $this->ls_GotHexNibble) {
if (($c = $this->ls_readhexnibble($timeout)) < 0)
return $c;
$c <<= 4;
}
if (($c2 = $this->ls_readhexnibble($timeout)) >= 0) {
$this->ls_GotHexNibble = 0;
return ($c|$c2);
} else {
$this->ls_GotHexNibble = 1;
return $c2;
}
}
/**
* Read one hex character
*
* @param int $timeout
* @return int
*/
private function ls_readhexnibble(int $timeout): int
{
if (($c = $this->ls_readcanned($timeout)) < 0)
return $c;
if (chr($c) >= '0' && chr($c) <= '9') {
return $c-ord('0');
} elseif (chr($c) >= 'a' && chr($c) <= 'f') {
return $c-ord('a')+10;
} else {
/* will be CRC error */
return 0;
}
}
/**
* Return 8bit character, strip <DLE>
*
* @param int $timeout
* @return int
*/
private function ls_readzdle(int $timeout): int
{
$r = 0;
/* There was no ZDLE in stream, try to read one */
if (! $this->ls_GotZDLE) {
do {
if (($c = $this->ls_readcanned($timeout)) < 0)
return $c;
/* Check for unescaped XON/XOFF */
if (! ($this->ls_Protocol&self::LSZ_OPTDIRZAP)) {
switch ($c) {
case self::XON:
case self::XON|0x80:
case self::XOFF:
case self::XOFF|0x80:
$c = self::LSZ_XONXOFF;
}
}
if ($c == self::ZDLE)
$this->ls_GotZDLE = 1;
elseif ($c != self::LSZ_XONXOFF)
return $c&0xff;
} while($c == self::LSZ_XONXOFF);
}
/* We will be here only in case of DLE */
/* We have data */
if (($c = $this->ls_readcanned($timeout)) >= 0) {
$this->ls_GotZDLE = 0;
switch ($c) {
case self::ZCRCE:
case self::ZCRCG:
case self::ZCRCW:
case self::ZCRCQ:
$r = ($c|0x100);
break;
}
/*
*chat*
if ($r && isset($rnode) && $rnode->opt&self::MO_CHAT) {
do {
$rr = $this->ls_readcanned($timeout);
// @todo to implement
$this->z_devrecv_c($rr,0);
} while($rr);
$this->z_devsend_c(0);
}
*/
if ($r)
return $r;
switch ($c) {
case self::ZRUB0:
return self::ZDEL;
case self::ZRUB1:
return (self::ZDEL|0x80);
default:
if (($c&0x60) != 0x40)
return self::LSZ_BADCRC;
return ($c^0x40)&0xff;
}
}
return $c;
}
/**
* Send one char with escaping
*
* @param int $c
* @throws \Exception
*/
private function ls_sendchar(int $c): void
{
$c &= 0xff;
/* We are Direct ZedZap -- escape only <DLE> */
if ($this->ls_Protocol&self::LSZ_OPTDIRZAP) {
$esc = (self::ZDLE == $c);
/* We are normal ZModem (may be ZedZap) */
} else {
/* Receiver want to escape ALL */
if (($this->ls_Protocol&self::LSZ_OPTESCAPEALL) && (($c&0x60) == 0)) {
$esc = 1;
} else {
switch ($c) {
case self::XON:
case (self::XON|0x80):
case self::XOFF:
case (self::XOFF|0x80):
case self::DLE:
case (self::DLE|0x80):
case self::ZDLE:
$esc = 1;
break;
default:
$esc = ((($this->ls_txLastSent&0x7f) == ord('@')) && (($c&0x7f) == self::CR));
break;
}
}
}
if ($esc) {
$this->client->buffer_add(chr(self::ZDLE));
$c ^= 0x40;
}
$this->client->buffer_add(chr($this->ls_txLastSent = $c));
}
/**
* Send one char as two hex digits
*
* @param int $i
* @throws \Exception
*/
private function ls_sendhex(int $c): void
{
$hexdigitslower = "0123456789abcdef";
$this->client->buffer_add(substr($hexdigitslower,($c&0xf0)>>4,1));
$this->client->buffer_add(chr($this->ls_txLastSent = ord(substr($hexdigitslower,($c&0x0f),1))));
}
/**
* Store long integer (4 bytes) in buffer, as it must be stored in header
*
* @param int $l
* @return array
*/
private function ls_storelong(int $l): array
{
$buf[self::LSZ_P0] = ($l)&0xff;
$buf[self::LSZ_P1] = ($l>>8)&0xff;
$buf[self::LSZ_P2] = ($l>>16)&0xff;
$buf[self::LSZ_P3] = ($l>>24)&0xff;
return $buf;
}
/**
* Abort the session
*
* @throws \Exception
*/
private function ls_zabort(): void
{
$this->client->buffer_flush($this->ls_DataTimeout);
$this->client->buffer_add(chr(self::XON));
for ($i=0;$i<8;$i++)
$this->client->buffer_add(chr(self::CAN));
$this->client->buffer_flush($this->ls_DataTimeout);
}
/**
* Finished receiving
*
* @return int
* @throws SocketException
*/
private function ls_zdonereceiver(): int
{
Log::debug(sprintf('%s: + Start',__METHOD__));
$trys = 0;
$retransmit = 1;
$this->rxbuf = '';
do {
if ($retransmit) {
if (($rc=$this->ls_zsendhhdr(self::ZFIN,$this->ls_storelong(0))) < 0)
return $rc;
$retransmit = 0;
$trys++;
}
switch ($rc=$this->client->read_ch($this->ls_HeaderTimeout)) {
/* Ok, GOOD */
case ord('O'):
$rc = $this->client->read_ch(0);
return self::LSZ_OK;
case self::XON:
case self::XOFF:
case self::XON|0x80:
case self::XOFF|0x80:
if ($this->DEBUG)
Log::debug(sprintf('%s: - XON/XOFF, skip it',__METHOD__));
break;
case self::ZPAD:
if ($this->DEBUG)
Log::debug(sprintf('%s: - ZPAD',__METHOD__));
if (($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$this->ls_HeaderTimeout)) < 0)
return $rc;
if (self::ZFIN != $rc)
return self::LSZ_OK;
$retransmit = 1;
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
$retransmit = 1;
}
} while ($trys < 10);
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
return $rc;
}
/**
* Init sender, preapre to send files (initialize timeouts too!)
*
* @param int $protocol
* @param int $window
* @return int
*/
private function ls_zinitsender(int $window,string $attstr)
{
Log::debug(sprintf('%s: + Start',__METHOD__));
$trys = 0;
/* Options from ZRINIT header */
$this->rxOptions = 0;
/* ZFIN counter -- we will trust only MAY of them on this stage */
$zfins = 0;
$this->ls_SerialNum = 1;
/* Why we need to send this? Old, good times... */
$this->client->send("rz\r",5);
$retransmit = 1;
do {
if ($retransmit) {
/* Send first ZRQINIT (do we need it?) */
if (($rc=$this->ls_zsendhhdr(self::ZRQINIT,$this->ls_storelong(0))) < 0)
return $rc;
$retransmit = 0;
$trys++;
}
switch ($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$this->ls_HeaderTimeout)) {
/* Ok, We got RINIT! */
case self::ZRINIT:
Log::debug(sprintf('%s: - ZRINIT',__METHOD__));
$this->rxOptions= (($this->ls_rxHdr[self::LSZ_F1]&0xff)<<8)|($this->ls_rxHdr[self::LSZ_F0]&0xff);
/* What receiver could (in hardware) -- Duplex, sim. I/O, send break signals */
$this->ls_rxCould = ($this->rxOptions&(self::LSZ_RXCANDUPLEX|self::LSZ_RXCANOVIO|self::LSZ_RXCANBRK));
/* Strip RLE from ls_Protocol, if peer could not use RLE (WE COULD NOT RLE in ANY CASE!) */
if (! ($this->rxOptions&self::LSZ_RXCANRLE))
$this->ls_Protocol &= (~self::LSZ_OPTRLE);
/* Strip CRC32 from $this->ls_Protocol, if peer could not use CRC32 */
if (! ($this->rxOptions&self::LSZ_RXCANFC32))
$this->ls_Protocol &= (~self::LSZ_OPTCRC32);
/* Set EscapeAll if peer want it */
if ($this->rxOptions&self::LSZ_RXWNTESCCTL)
$this->ls_Protocol |= self::LSZ_OPTESCAPEALL;
/* Strip VHeaders from $this->ls_Protocol, if peer could not use VHDR */
if (! ($this->rxOptions&self::LSZ_RXCANVHDR))
$this->ls_Protocol &= (~self::LSZ_OPTVHDR);
/* Ok, options are ready */
/* Fetch window size */
$this->ls_txWinSize = (($this->ls_rxHdr[self::LSZ_P1]&0xff)<<8)|($this->ls_rxHdr[self::LSZ_P0]&0xff);
/* Override empty or big window by our window (if not emty too) */
if ($window && (! $this->ls_txWinSize || ($this->ls_txWinSize > $window)))
$this->ls_txWinSize = $window;
Log::debug(sprintf('%s: - ZRINIT OK - effproto [%08x], winsize [%d]',__METHOD__,$this->ls_Protocol,$this->ls_txWinSize));
/* Ok, now we could calculate real max frame size and initial block size */
if ($this->ls_txWinSize && $this->ls_MaxBlockSize>$this->ls_txWinSize) {
for ($this->ls_MaxBlockSize=1;$this->ls_MaxBlockSize<$this->ls_txWinSize;$this->ls_MaxBlockSize<<=1) {};
/*ls_MaxBlockSize >>= 1;*/
if ($this->ls_MaxBlockSize<32)
$this->ls_txWinSize = $this->ls_MaxBlockSize=32;
}
if ($this->client->speed < 2400)
$this->ls_txCurBlockSize = 256;
elseif ($this->client->speed >= 2400 && $this->client->speed < 4800)
$this->ls_txCurBlockSize = 512;
else
$this->ls_txCurBlockSize = 1024;
if ($this->ls_Protocol&self::LSZ_OPTZEDZAP) {
if ($this->client->speed >= 7200 && $this->client->speed < 9600)
$this->ls_txCurBlockSize = 2048;
elseif ($this->client->speed >= 9600 && $this->client->speed < 14400)
$this->ls_txCurBlockSize = 4096;
elseif ($this->client->speed >= 14400)
$this->ls_txCurBlockSize = 8192;
}
if ($this->ls_txCurBlockSize>$this->ls_MaxBlockSize)
$this->ls_txCurBlockSize=$this->ls_MaxBlockSize;
Log::debug(sprintf('%s: - ZRINIT OK - block sizes Max [%d] Current [%d]',__METHOD__,$this->ls_MaxBlockSize,$this->ls_txCurBlockSize));
/* Send ZSINIT, if we need it */
if ($attstr || (! ($this->rxOptions&self::LSZ_RXWNTESCCTL) && ($this->ls_Protocol&self::LSZ_OPTESCAPEALL)))
return $this->ls_zsendsinit($attstr);
else
return self::LSZ_OK;
/* Return number to peer, he is paranoid */
case self::ZCHALLENGE:
Log::debug(sprintf('%s: - CHALLENGE',__METHOD__));
if (($rc=$this->ls_zsendhhdr(ZACK,$this->ls_rxHdr)) < 0)
return $rc;
break;
/* Send ZRQINIT again */
case self::ZNAK:
case self::LSZ_TIMEOUT:
$retransmit = 1;
break;
/* ZFIN from previous session? Or may be real one? */
case self::ZFIN:
Log::debug(sprintf('%s: - ZFIN [%d]',__METHOD__,$zfins));
if (++$zfins == self::LSZ_TRUSTZFINS)
return self::LSZ_ERROR;
break;
/* Please, resend */
case self::LSZ_BADCRC:
Log::debug(sprintf('%s: - LSZ_BADCRC',__METHOD__));
/* We don't support it! */
case self::ZCOMMAND:
Log::debug(sprintf('%s: - ZCOMMAND',__METHOD__));
$this->ls_zsendhhdr(ZNAK,$this->ls_storelong(0));
/* Abort this session -- we trust in ABORT! */
case self::ZABORT:
Log::debug(sprintf('%s: - ZABORT',__METHOD__));
return self::LSZ_ERROR;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
}
} while ($trys < 10);
Log::error(sprintf('%s: ? Something strange or timeout [%d]',__METHOD__,$rc));
return $rc;
}
private function ls_zrecvdata(&$data,&$len,$timeout,$crc32) {
return $crc32 ? $this->ls_zrecvdata32($data,$len,$timeout) : $this->ls_zrecvdata16($data,$len,$timeout);
}
/**
* Receive data subframe with CRC32, return frame type or error (may be -- timeout)
*
* @param string $data
* @param int $len
* @param int $timeout
* @return int
*/
private function ls_zrecvdata32(string &$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_CRC32; /* 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($timeout)) >= 0)) {
if ($this->DEBUG)
Log::debug(sprintf(' - got [%x] (%c)',$c,($c<31 ? 32 : $c)),['m'=>__METHOD__,'c'=>serialize($c)]);
if ($c < 256) {
$data .= chr($c&0xff);
if (++$got > $this->ls_MaxBlockSize)
return self::LSZ_BADCRC;
$incrc = $this->CRC32_UPDATE($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 = $this->CRC32_UPDATE($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 << 0x00);
if (($c = $this->ls_readzdle($timeout)) < 0)
return $c;
$crc |= ($c << 0x08);
if (($c = $this->ls_readzdle($timeout)) < 0)
return $c;
$crc |= ($c << 0x10);
if (($c = $this->ls_readzdle($timeout)) < 0)
return $c;
$crc |= ($c << 0x18);
$incrc = $this->CRC32_FINISH($incrc);
if ($this->DEBUG)
Log::debug(sprintf('CRC%d got %08x - calculated %08x',32,$incrc,$crc),['m'=>__METHOD__,'crc'=>$crc,'test_crc32'=>sprintf('%08x',$this->CRC32($data))]);
if ($incrc != $crc)
return self::LSZ_BADCRC;
$len = $got;
if ($this->DEBUG)
Log::debug('= End',['m'=>__METHOD__,'frametype'=>$frametype]);
return $frametype;
}
/**
* Receive one file
*
* @param int $pos
* @return int
* @throws \Exception
*/
private function ls_zrecvfile(int $pos): int
{
Log::debug('+ Start',['m'=>__METHOD__,'pos'=>$pos]);
$needzdata = 1;
$len = 0;
$rxpos = $pos;
$rxstatus = 0;
$this->rxbuf = '';
if (($rc=$this->ls_zsendhhdr(self::ZRPOS,$this->ls_storelong($rxpos))) < 0)
return $rc;
do {
if (! $needzdata) {
switch (($rc=$this->ls_zrecvdata($this->rxbuf,$len,$this->ls_DataTimeout,$this->ls_Protocol&self::LSZ_OPTCRC32))) {
case self::ZCRCE:
$needzdata = 1;
case self::ZCRCG:
Log::debug(sprintf('%s: - ZCRC%s, [%d] bytes at [%d]',__METHOD__,($rc==self::ZCRCE ? 'E' : 'G'),$len,$rxpos));
$rxpos += $len;
if ($len != $this->recv->write($this->rxbuf))
return self::ZFERR;
$this->rxbuf = '';
break;
case self::ZCRCW:
$needzdata = 1;
case self::ZCRCQ:
Log::debug(sprintf('%s: - ZCRC%s, [%d] bytes at [%d]',__METHOD__,($rc==self::ZCRCW ? 'W' : 'Q'),$len,$rxpos));
$rxpos += $len;
if ($len != $this->recv->write($this->rxbuf))
return self::ZFERR;
$this->rxbuf = '';
$this->ls_zsendhhdr(self::ZACK,$this->ls_storelong($rxpos));
break;
case self::LSZ_BADCRC:
case self::LSZ_TIMEOUT:
if ($this->ls_rxAttnStr) {
$this->client->buffer_add($this->ls_rxAttnStr);
$this->client->buffer_flush(5);
}
$this->client->rx_purge();
$this->ls_zsendhhdr(self::ZRPOS,$this->ls_storelong($rxpos));
$needzdata = 1;
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
if ($this->ls_rxAttnStr) {
$this->client->buffer_add($this->ls_rxAttnStr);
$this->client->buffer_flush(5);
}
$this->client->rx_purge();
$this->ls_zsendhhdr(self::ZRPOS,$this->ls_storelong($rxpos));
$needzdata = 1;
}
/* We need new position -- ZDATA (and may be ZEOF) */
} else {
Log::debug(sprintf('%s: - Want ZDATA/ZEOF at [%d]',__METHOD__,$rxpos));
if (($rc=$this->ls_zrecvnewpos($rxpos,$newpos)) < 0)
return $rc;
if ($newpos != $rxpos) {
Log::error(sprintf('%s: - Bad new position [%d] in [%d]',__METHOD__,$newpos,$rc));
if ($this->ls_rxAttnStr) {
$this->client->buffer_add($this->ls_rxAttnStr);
$this->client->buffer_flush(5);
}
$this->client->rx_purge();
if (($rc=$this->ls_zsendhhdr(self::ZRPOS,$this->ls_storelong($rxpos))) < 0)
return $rc;
} else {
if ($rc == self::ZEOF) {
Log::debug(sprintf('%s: - ZEOF',__METHOD__));
if (($rc=$this->ls_zsendhhdr(self::ZRINIT,$this->ls_storelong(0))) < 0)
return $rc;
return self::LSZ_OK;
}
Log::debug(sprintf('%s: - ZDATA',__METHOD__));
$needzdata = 0;
}
}
if ($rxstatus)
return ($rxstatus==self::RX_SKIP) ? self::ZSKIP : self::ZFERR;
} while(TRUE);
return self::LSZ_OK;
}
/**
* @param int $frame
* @param int $first
* @return int
* @throws \Exception
*/
private function ls_zrecvfinfo(int $frame,int $first): int
{
Log::debug(sprintf('%s: + Start - Frame [%d], First [%d]',__METHOD__,$frame,$first));
$trys = 0;
$retransmit = ($frame != self::ZRINIT);
$len = 0;
$rc = 0;
/* ZFIN counter -- we will trust only MAY of them on first stage */
$zfins = 0;
$win = $this->ls_txWinSize;
$flags = (self::LSZ_RXCANDUPLEX|self::LSZ_RXCANOVIO);
if ($this->ls_Protocol&self::LSZ_OPTCRC32)
$flags |= self::LSZ_RXCANFC32;
if ($this->ls_Protocol&self::LSZ_OPTESCAPEALL)
$flags |= self::LSZ_RXWNTESCCTL;
if ($this->ls_Protocol&self::LSZ_OPTESC8)
$flags |= self::LSZ_RXWNTESC8;
do {
if ($retransmit) {
if ($frame != self::ZRINIT) {
if (($rc=$this->ls_zsendhhdr($frame,$this->ls_storelong($this->ls_SerialNum))) < 0)
return $rc;
}
Log::debug(sprintf('%s: - ZRINIT',__METHOD__));
$txHdr = [];
$txHdr[self::LSZ_P0] = ($win&0xff);
$txHdr[self::LSZ_P1] = (($win>>8)&0xff);
$txHdr[self::LSZ_F1] = ($this->ls_Protocol&self::LSZ_OPTVHDR) ? self::LSZ_RXCANVHDR : 0;
$txHdr[self::LSZ_F0] = $flags;
if (($rc=$this->ls_zsendhhdr(self::ZRINIT,$txHdr)) < 0)
return $rc;
$retransmit = 0;
$trys++;
}
switch (($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$this->ls_HeaderTimeout))) {
/* Send ZRINIT again */
case self::ZRQINIT:
Log::debug(sprintf('%s: - ZRQINIT',__METHOD__));
/* We will trust in first ZFIN after ZRQINIT */
$first = 1;
case self::ZNAK:
Log::debug(sprintf('%s: - ZNAK',__METHOD__));
case self::LSZ_TIMEOUT:
Log::debug(sprintf('%s: - LSZ_TIMEOUT',__METHOD__));
$retransmit = 1;
break;
/* He want to set some options */
case self::ZSINIT:
Log::debug(sprintf('%s: - ZSINIT',__METHOD__));
if (($rc=$this->ls_zrecvcrcw($this->rxbuf,$len)) < 0)
return $rc;
/* We will trust in first ZFIN after ZSINIT */
$first = 0;
/* Everything is OK */
if (! $rc) {
$this->ls_zsendhhdr(self::ZACK,$this->ls_storelong(1));
$this->ls_rxAttnStr = $this->rxbuf;
if ($this->ls_rxHdr[self::LSZ_F0]&self::LSZ_TXWNTESCCTL)
$this->ls_Protocol |= self::LSZ_OPTESCAPEALL;
if ($this->ls_rxHdr[self::LSZ_F0]&self::LSZ_TXWNTESC8)
$this->ls_Protocol |= self::LSZ_OPTESC8;
/* We could not receive ZCRCW subframe, but error is not fatal */
} else {
$trys++;
}
break;
/* Ok, File started! */
case self::ZFILE:
Log::debug(sprintf('%s: - ZFILE',__METHOD__));
if (($rc=$this->ls_zrecvcrcw($this->rxbuf,$len)) < 0)
return $rc;
/* Everything is OK, decode frame */
if (! $rc) {
$file = [];
$file['name'] = substr($this->rxbuf,0,$x=strpos($this->rxbuf,chr(0x00)));
if (sscanf(substr($this->rxbuf,$x+1),
'%ld %lo %o %o %ld %ld',
$file['size'],
$file['mtime'],
$len, // @todo What is $len?
$ls_SerialNum, // @todo Do we use this?
$filesleft, // @todo Should track this
$bytesleft) < 2)
{
Log::error(sprintf('%s: ! File info is corrupted [%s]',__METHOD__,$this->rxbuf));
$filesleft = -1;
} else {
$this->recv->new($file);
}
return self::ZFILE;
/* We could not receive ZCRCW subframe, but error is not fatal */
} else {
$trys++;
}
break;
/* ZFIN from previous session? Or may be real one? */
case self::ZFIN:
Log::debug(sprintf('%s: - ZFIN [%d], first [%d]',__METHOD__,$zfins,$first));
if ($first || (++$zfins == self::LSZ_TRUSTZFINS))
return self::ZFIN;
break;
/* Abort this session -- we trust in ABORT! */
case self::ZABORT:
Log::debug(sprintf('%s: - ZABORT',__METHOD__));
return self::ZABORT;
case self::LSZ_BADCRC:
Log::debug(sprintf('%s: - BADCRC',__METHOD__));
$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0));
$retransmit = 1;
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0));
}
} while ($trys < 10);
Log::error(sprintf('%s: ? Something strange or timeout',__METHOD__));
return self::LSZ_TIMEOUT;
}
private function ls_zrecvhdr(array &$hdr,int $timeout): int
{
if ($this->DEBUG)
Log::debug(sprintf('%s: + Start with [%d] timeout',__METHOD__,$timeout));
$state = self::rhInit;
$readmode = self::rm7BIT;
static $frametype = self::LSZ_ERROR; /* Frame type */
static $crcl = 2; /* Length of CRC (CRC16 is default) */
static $crcgot = 0; /* Number of CRC bytes already got */
static $incrc = 0; /* Calculated CRC */
static $crc = 0; /* Received CRC */
static $len = 4; /* Length of header (4 is default) */
static $got = 0; /* Number of header bytes already got */
static $garbage = 0; /* Count of garbage characters */
$c = -1;
if ($state == self::rhInit) {
if ($this->DEBUG)
Log::debug(sprintf('%s: - Init State',__METHOD__));
$frametype = self::LSZ_ERROR;
$crc = 0;
$crcl = 2;
$crcgot = 0;
$incrc = self::LSZ_INIT_CRC16;
$len = 4;
$got = 0;
$readmode = self::rm7BIT;
}
while ($rc = $this->client->hasData($timeout)) {
if ($this->DEBUG)
Log::debug(sprintf('%s: - hasData - readmode [%d] - Garbage [%d]',__METHOD__,$readmode,$garbage));
switch ($readmode) {
case self::rm8BIT:
$c = $this->ls_readcanned($timeout);
break;
case self::rm7BIT:
$c = $this->ls_read7bit($timeout);
break;
case self::rmZDLE:
$c = $this->ls_readzdle($timeout);
break;
case self::rmHEX:
$c = $this->ls_readhex($timeout);
break;
}
if ($this->DEBUG)
Log::debug(sprintf('%s: - %s [%x] (%c)',__METHOD__,$readmode,$c,$c));
/* Here is error */
if ($c < 0)
return $c;
/* Strip high bits */
$c &= 0xff;
if ($this->DEBUG)
Log::debug(sprintf('%s: = %x',__METHOD__,$c),['state'=>$state]);
switch ($state) {
case self::rhInit:
if ($c == self::ZPAD)
$state = self::rhZPAD;
else
$garbage++;
break;
case self::rhZPAD:
switch ($c) {
case self::ZPAD:
break;
case self::ZDLE:
$state = self::rhZDLE;
break;
default:
$garbage++;
$state = self::rhInit;
break;
}
break;
case self::rhZDLE:
switch ($c) {
case self::ZBIN:
$state = self::rhZBIN;
$readmode = self::rmZDLE;
break;
case self::ZHEX:
$state = self::rhZHEX;
$readmode = self::rmHEX;
break;
case self::ZBIN32:
$state = self::rhZBIN32;
$readmode = self::rmZDLE;
break;
case self::ZVBIN:
$state = self::rhZVBIN;
$readmode = self::rmZDLE;
break;
case self::ZVHEX:
$state = self::rhZVHEX;
$readmode = self::rmHEX;
break;
case self::ZVBIN32:
$state = self::rhZVBIN32;
$readmode = self::rmZDLE;
break;
default:
$garbage++;
$state = self::rhInit;
$readmode = self::rm7BIT;
}
break;
case self::rhZVBIN32:
$crcl = 4;
/* Fall throught */
case self::rhZVBIN:
case self::rhZVHEX:
if ($c > self::LSZ_MAXHLEN) {
$state = self::rhInit;
return self::LSZ_BADCRC;
}
$len = $c;
$state = self::rhFrameType;
break;
case self::rhZBIN32:
$crcl = 4;
/* Fall throught */
case self::rhZBIN:
case self::rhZHEX:
$len = 4;
case self::rhFrameType:
if (($c < 0) || ($c > self::LSZ_MAXFRAME)) {
$state = self::rhInit;
return self::LSZ_BADCRC;
}
$frametype = $c;
$incrc = ($crcl == 2) ? $this->CRC16USD_UPDATE($c,self::LSZ_INIT_CRC16) : $this->CRC32_UPDATE($c,self::LSZ_INIT_CRC32);
$state = self::rhBYTE;
break;
case self::rhBYTE:
if ($this->DEBUG)
Log::debug(sprintf('%s: - [%02x] (%d)',__METHOD__,$c,$got));
$hdr[$got] = $c;
if ($len == ++$got)
$state = self::rhCRC;
$incrc = ($crcl == 2) ? $this->CRC16USD_UPDATE($c,$incrc) : $this->CRC32_UPDATE($c,$incrc);
break;
case self::rhCRC:
if ($this->DEBUG)
Log::debug(sprintf('%s: - [%02x] (%d|%d)',__METHOD__,$c,$crcgot+1,$got));
if ($crcl == 2) {
$crc <<= 8;
$crc |= $c;
} else {
$crc |= ($c << ($crcgot*8));
}
/* Crc finished */
if ($crcl == ++$crcgot) {
$state = self::rhInit;
$garbage = 0;
if ($crcl == 2) {
if (($this->ls_Protocol&self::LSZ_OPTCRC32) && ($readmode != self::rmHEX))
Log::error(sprintf('%s: - was CRC32, got CRC16 binary header',__METHOD__));
$crc &= 0xffff;
if ($readmode != self::rmHEX)
$this->ls_Protocol &= (~self::LSZ_OPTCRC32);
} else {
if (! ($this->ls_Protocol&self::LSZ_OPTCRC32))
Log::error(sprintf('s: - was CRC16, got CRC32 binary header',__METHOD__));
$incrc = $this->CRC32_FINISH($incrc);
$this->ls_Protocol |= self::LSZ_OPTCRC32;
}
if ($this->DEBUG)
Log::debug(sprintf('%s: - CRC%d got %08x - calculated %08x',__METHOD__,(($crcl==2) ? 16 : 32),$incrc,$crc));
if ($incrc != $crc)
return self::LSZ_BADCRC;
/* We need to read <CR><LF> after HEX header */
if ($readmode == self::rmHEX) {
$state = self::rhCR;
$readmode = self::rm8BIT;
} else {
return $frametype;
}
}
break;
case self::rhCR:
$state = self::rhInit;
switch ($c) {
/* we need LF after <CR> */
case self::CR:
case self::CR|0x80:
if ($this->DEBUG)
Log::debug(sprintf('%s: ? rhCR, ignoring any remaining chars [%d]',__METHOD__,$c));
/* At this point, most implementations ignore checking for the remaining chars */
return $frametype;
/* Ok, UNIX-like EOL */
case self::LF:
case self::LF|0x80:
$state = self::rhXON;
break;
case self::XON:
case self::XON|0x80:
if ($this->DEBUG)
Log::debug(sprintf('%s: ? rhCR, got XON without CR/LF [%d]',__METHOD__,$c));
return $frametype;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$c));
return self::LSZ_BADCRC;
}
break;
case self::rhLF:
$state = self::rhInit;
switch ($c) {
case self::LF:
case self::LF|0x80:
$state = self::rhXON;
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$c));
return self::LSZ_BADCRC;
}
break;
case self::rhXON:
$state = self::rhInit;
if ($this->DEBUG)
Log::debug(sprintf('%s: rhXON',__METHOD__));
switch ($c) {
case self::ZPAD:
case self::ZPAD|0x80:
$state = self::rhZPAD;
$got = 0;
$crcgot = 0;
break;
case self::XON:
case self::XON|0x80:
return $frametype;
default:
Log::error(sprintf('%s: ! rhXON unexpcted [%d]',__METHOD__,$c));
return self::LSZ_BADCRC;
}
break;
}
}
Log::error(sprintf('%s: ? Something strange or timeout [%d]',__METHOD__,$rc));
return $rc;
}
/**
* Internal function -- receive ZCRCW frame in 10 trys, send ZNAK/ZACK
*
* @param string $buf
* @param int $len
* @return int
*/
private function ls_zrecvcrcw(string &$buf,int $len): int
{
$trys = 0;
do {
switch (($rc=$this->ls_zrecvdata($buf,$len,$this->ls_DataTimeout,$this->ls_Protocol&self::LSZ_OPTCRC32))) {
/* Ok, here it is */
case self::ZCRCW:
return self::LSZ_OK;
case self::LSZ_BADCRC:
Log::debug(sprintf('%s: - got BADCRC',__METHOD__));
$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0));
return 1;
case self::LSZ_TIMEOUT:
Log::debug(sprintf('%s: - got TIMEOUT',__METHOD__));
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0));
return 1;
}
} while (++$trys < 10);
$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0));
return 1;
}
/**
* Receive ZDATA/ZEOF frame, do 10 trys, return position
*
* @param $oldpos
* @param $pos
* @return int
*/
private function ls_zrecvnewpos($oldpos,&$pos): int
{
$rc = 0;
$trys = 0;
do {
switch (($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$this->ls_HeaderTimeout))) {
case self::ZDATA:
case self::ZEOF:
$pos = $this->ls_fetchlong($this->ls_rxHdr);
return $rc;
case self::ZNAK:
if (($rc=$this->ls_zsendhhdr(self::ZRPOS,$this->ls_storelong($oldpos))) < 0)
return $rc;
break;
case self::LSZ_TIMEOUT:
break;
case self::LSZ_BADCRC:
$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0));
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0));
}
} while (++$trys < 10);
Log::error(sprintf('%s: ? Something strange or timeout [%d]',__METHOD__,$rc));
return self::LSZ_TIMEOUT;
}
/**
* Internal function to process ZRPOS
*
* @param Send $send
* @param int $newpos
* @return int
* @throws \Exception
*/
private function ls_zrpos(Send $send,int $newpos): int
{
Log::debug(sprintf('%s: + Start, newpos [%d]',__METHOD__,$newpos));
if ($newpos == $this->ls_txLastRepos) {
if (++$this->ls_txReposCount > 10) {
Log::error(sprintf('%s: ! ZRPOS to [%ld] limit reached',__METHOD__,$newpos));
return self::LSZ_ERROR;
}
} else {
$this->ls_txReposCount = 0;
$this->ls_txLastRepos = $newpos;
}
/* Drop window */
$this->ls_txLastACK = $newpos;
if (! $send->seek($newpos)) {
Log::error(sprintf('%s: ! ZRPOS to [%ld] seek error',__METHOD__,$send->filepos));
return self::LSZ_ERROR;
}
if ($this->ls_txCurBlockSize > 32)
$this->ls_txCurBlockSize >>= 1;
$this->ls_txGoodBlocks = 0;
return self::LSZ_OK;
}
/**
* Send data block, with CRC16 and framing
*
* @param string $data
* @param int $frame
* @return int
* @throws \Exception
*/
private function ls_zsenddata(string $data,int $frame): int
{
Log::debug(sprintf('%s: + Start [%d] (%d)',__METHOD__,strlen($data),$frame));
if ($this->ls_Protocol&self::LSZ_OPTCRC32) {
if ($this->DEBUG)
Log::debug(sprintf('%s: - CRC32',__METHOD__));
$crc = self::LSZ_INIT_CRC32;
for ($n=0;$n<strlen($data);$n++) {
$this->ls_sendchar(ord($data[$n]));
$crc = $this->CRC32_UPDATE(ord($data[$n]),$crc);
}
$this->client->buffer_add(chr(self::ZDLE).chr($frame));
$crc = $this->CRC32_UPDATE($frame,$crc);
/*
*chat*
if (FALSE AND $rnode->opt&self::MO_CHAT) {
if ($frame==self::ZCRCG||$frame==self::ZCRCW) {
z_devsend_c(1);
}
$this->client->buffer_add(chr(0));
}
*/
$crc = $this->CRC32_FINISH($crc);
$this->ls_sendchar($crc&0xff);
$crc >>= 8;
$this->ls_sendchar($crc&0xff);
$crc >>= 8;
$this->ls_sendchar($crc&0xff);
$crc >>= 8;
$this->ls_sendchar($crc&0xff);
$crc >>= 8;
} else {
if ($this->DEBUG)
Log::debug(sprintf('%s: - CRC16',__METHOD__));
$crc = self::LSZ_INIT_CRC16;
for ($n=0;$n<strlen($data);$n++) {
$this->ls_sendchar(ord($data[$n]));
$crc = $this->CRC16USD_UPDATE(ord($data[$n]),$crc);
}
$this->client->buffer_add(chr(self::ZDLE).chr($frame));
$crc = $this->CRC16USD_UPDATE($frame,$crc);
/*
*chat*
if (FALSE AND $rnode->opt&self::MO_CHAT) {
if ($frame==self::ZCRCG||$frame==self::ZCRCW) {
z_devsend_c(1);
}
$this->client->buffer_add(chr(0));
}
*/
$crc &= 0xffff;
$this->ls_sendchar($crc >> 8);
$this->ls_sendchar($crc&0xff);
}
if (! ($this->ls_Protocol&self::LSZ_OPTDIRZAP) && self::ZCRCW == $frame)
$this->client->buffer_add(chr(self::XON));
return $this->client->buffer_flush($this->ls_DataTimeout);
}
/**
* Send binary header. Use proper CRC, send var. len. if could
*
* @param int $frametype
* @param array $hdr
* @return int
* @throws \Exception
*/
private function ls_zsendbhdr(int $frametype,array $hdr): int
{
Log::debug(sprintf('%s: + Start',__METHOD__));
$crc = $this->LSZ_INIT_CRC();
/* First, calculate packet header byte */
if (($type = self::HEADER_TYPE
[($this->ls_Protocol&self::LSZ_OPTCRC32)==self::LSZ_OPTCRC32]
[($this->ls_Protocol&self::LSZ_OPTVHDR)==self::LSZ_OPTVHDR]
[($this->ls_Protocol&self::LSZ_OPTRLE)==self::LSZ_OPTRLE]) < 0)
{
return self::LSZ_ERROR;
}
/* Send *<DLE> and packet type */
$this->client->buffer_add(chr(self::ZPAD).chr(self::ZDLE).chr($type));
/* Send length of header, if needed */
if ($this->ls_Protocol&self::LSZ_OPTVHDR)
$this->ls_sendchar(count($hdr));
/* Send type of frame */
$this->ls_sendchar($frametype);
$crc = $this->LSZ_UPDATE_CRC($frametype,$crc);
/* Send whole header */
for ($n=0; $n<count($hdr); $n++) {
$this->ls_sendchar($hdr[$n]);
$crc = $this->LSZ_UPDATE_CRC($hdr[$n],$crc);
}
$crc = $this->LSZ_FINISH_CRC($crc);
if ($this->ls_Protocol&self::LSZ_OPTCRC32) {
for ($n=0;$n<4;$n++) {
$this->ls_sendchar($crc&0xff);
$crc >>= 8;
}
} else {
$crc &= 0xffff;
$this->ls_sendchar($crc >> 8);
$this->ls_sendchar($crc&0xff);
}
/* Clean buffer, do real send */
return $this->client->buffer_flush($this->ls_HeaderTimeout);
}
/**
* Send one file to peer
*
* @param Send $send
* @param int $sernum
* @param int $fileleft
* @param int $bytesleft
* @return int
* @throws \Exception
*/
private function ls_zsendfile(Send $send,int $sernum,int $fileleft,int $bytesleft): int
{
Log::debug(sprintf('%s: + Start [%s]',__METHOD__,$send->name));
$trys = 0;
$needack = 0;
switch (($rc = $this->ls_zsendfinfo($send,$sernum,$send->filepos,$fileleft,$bytesleft))) {
/* Ok, It's OK! */
case self::ZRPOS:
Log::debug(sprintf('%s: - ZRPOS to [%d]',__METHOD__,$send->filepos));
break;
/* Skip it */
case self::ZSKIP:
/* Suspend it */
case self::ZFERR:
// @todo Mark the file as skipped
Log::debug(sprintf('%s: - ZSKIP/ZFERR',__METHOD__));
return $rc;
case self::ZABORT:
/* Session is aborted */
case self::ZFIN:
Log::debug(sprintf('%s: - ZABORT/ZFIN',__METHOD__));
$this->ls_zsendhhdr(self::ZFIN,$this->ls_storelong(0));
return self::LSZ_ERROR;
default:
if ($rc < 0)
return $rc;
Log::debug(sprintf('%s: - Strange answer on ZFILE: %d',__METHOD__,$rc));
return self::LSZ_ERROR;
}
/* Send file data */
if ($this->ls_txWinSize)
$mode = ($this->ls_rxCould&self::LSZ_RXCANDUPLEX) ? self::sfSlidingWindow : self::sfBuffered;
else
$mode = self::sfStream;
$frame = self::ZCRCW;
while (! $send->feof()) {
/* We need to send ZDATA if previous frame was ZCRCW
Also, frame will be ZCRCW, if it is after RPOS */
if ($frame == self::ZCRCW) {
Log::debug(sprintf('%s: - send ZDATA at [%d]',__METHOD__,$send->filepos));
if (($rc=$this->ls_zsendbhdr(self::ZDATA,$this->ls_storelong($send->filepos))) < 0)
return $rc;
}
/* Send frame of data */
try {
$txbuf = $send->read($this->ls_txCurBlockSize);
} catch (\Exception $e) {
Log::error(sprintf('%s: Read error'));
return self::LSZ_ERROR;
}
/* Select sub-frame type */
/* This is last sub-frame -- EOF */
if (strlen($txbuf) < $this->ls_txCurBlockSize) {
$frame = ($mode == self::sfStream) ? self::ZCRCE : self::ZCRCW;
/* This is not-last sub-frame */
} else {
switch ($mode) {
/* Simple sub-frame */
case self::sfStream:
$frame = self::ZCRCG;
break;
/* Simple sub-frame, but with SlWin */
case self::sfSlidingWindow:
$frame = self::ZCRCQ;
break;
case self::sfBuffered:
if (($send->filepos + strlen($txbuf)) > $this->ls_txLastACK + $this->ls_txWinSize) {
$frame = self::ZCRCW; /* Last sub-frame in buffer */
} else {
$frame = self::ZCRCG; /* Simple sub-frame */
}
break;
}
}
if (($rc=$this->ls_zsenddata($txbuf,$frame)) < 0)
return $rc;
/* Ok, now wait for ACKs if here is window, or sample for RPOSes */
$trys = 0;
do {
$needack = (self::ZCRCW == $frame) || ($this->ls_txWinSize && ($send->filepos > $this->ls_txLastACK + $this->ls_txWinSize));
switch (($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$needack ? $this->ls_HeaderTimeout : 0))) { // @todo set timeout to 5 for debugging wtih POP
/* They don't need this file */
case self::ZSKIP:
Log::debug(sprintf('%s: - ZSKIP',__METHOD__));
/* Problems occured -- suspend file */
case self::ZFERR:
Log::debug(sprintf('%s: - ZFERR',__METHOD__));
return $rc;
/* Ok, position ACK */
case self::ZACK:
$this->ls_txLastACK = $this->ls_fetchlong($this->ls_rxHdr);
Log::debug(sprintf('%s: - ZACK',__METHOD__),['ls_rxHdr'=>$this->ls_rxHdr,'ls_txLastACK'=>$this->ls_txLastACK,'ls_rxHdr'=>$this->ls_rxHdr]);
break;
/* Repos */
case self::ZRPOS:
Log::debug(sprintf('%s: - ZRPOS',__METHOD__));
if (($rc=$this->ls_zrpos($send,$this->ls_fetchlong($this->ls_rxHdr))) < 0)
return $rc;
Log::debug(sprintf('%s: - ZRPOS [%d]',__METHOD__,$rc));
/* Force to retransmit ZDATA */
$frame = self::ZCRCW;
break;
/* Abort transfer */
case self::ZABORT:
/* Strange? Ok, abort too */
case self::ZFIN:
/* Abort too */
case self::ZCAN:
case self::LSZ_CAN:
$this->ls_zsendhhdr(self::ZFIN,$this->ls_storelong(0));
/* Fall through */
case self::LSZ_RCDO:
case self::LSZ_ERROR:
return self::LSZ_ERROR;
case self::LSZ_TIMEOUT: /* Ok! */
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
}
} while(
/* Here is window, and we send more than window without ACK*/
/* Frame was ZCRCW and here is no ACK for it */
/* trys less than 10 */
(($this->ls_txWinSize && ($send->filepos>($this->ls_txLastACK+$this->ls_txWinSize)))
|| ((self::ZCRCW == $frame) && ($send->filepos>$this->ls_txLastACK)))
&& ++$trys < 10);
if ($trys >= 10)
return self::LSZ_ERROR;
/* Ok, increase block, if here is MANY good blocks was sent */
if (++$this->ls_txGoodBlocks > 32) {
$this->ls_txCurBlockSize <<= 1;
if ($this->ls_txCurBlockSize > $this->ls_MaxBlockSize)
$this->ls_txCurBlockSize = $this->ls_MaxBlockSize;
$this->ls_txGoodBlocks = 0;
}
/* Ok, if here is EOF, send it and wait for ZRINIT or ZRPOS */
/* We do it here, because we coulde receive ZRPOS as answer */
if ($send->feof()) {
if (($rc=$this->ls_zsendhhdr(self::ZEOF,$this->ls_storelong($send->filepos))) < 0)
return $rc;
$trys = 0;
do {
switch (($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$this->ls_HeaderTimeout))) {
/* They don't need this file */
case self::ZSKIP:
/* Problems occured -- suspend file */
case self::ZFERR:
return $rc;
/* Repos */
case self::ZRPOS:
if (($rc=$this->ls_zrpos($send,$this->ls_fetchlong($this->ls_rxHdr))) < 0)
return $rc;
/* Force to retransmit ZDATA */
$frame = self::ZCRCW;
break;
/* OK! */
case self::ZRINIT:
return self::LSZ_OK;
/* ACK for data -- it lost! */
case self::ZACK:
Log::debug(sprintf('%s: - ZACK after EOF',__METHOD__));
$this->ls_txLastACK = $this->ls_fetchlong($this->ls_rxHdr);
break;
/* Abort transfer */
case self::ZABORT:
/* Strange? Ok, abort too */
case self::ZFIN:
/* Abort too */
case self::ZCAN:
return self::LSZ_ERROR;
/* Ok, here is no header */
case self::LSZ_TIMEOUT:
$trys++;
break;
default:
Log::error(sprintf('%s: ? Something strange after ZEOF [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
$trys++;
}
} while ($send->feof() && $trys < 10);
if ($send->feof()) {
Log::error(sprintf('%s: ! To many tries waiting for ZEOF ACK',__METHOD__));
return self::LSZ_ERROR;
}
}
}
Log::error(sprintf('%s: ? Something strange or timeout [%d]',__METHOD__,$rc));
return $rc;
}
/**
* Send file information to peer, get start position from them.
* Return packet type -- ZRPOS, ZSKIP, ZFERR, ZABORT or ZFIN (may be any error, too)
*
* @param int $sernum
* @param int $pos
* @return int
*/
private function ls_zsendfinfo(Send $send,int $sernum,int $pos,int $fileleft,int $bytesleft): int
{
Log::debug(sprintf('%s: + Start [%s]',__METHOD__,$send->name));
$trys = 0;
$retransmit = 1;
$crc = self::LSZ_INIT_CRC32;
$buf = '';
$this->client->buffer_clear();
$buf = $send->sendas.chr(0);
$buf .= sprintf('%ld %lo %o %o %ld %ld',
$send->size,
$send->mtime,
0,
$sernum,
$fileleft,
$bytesleft
);
do {
if ($retransmit) {
$txHdr = [];
$txHdr[self::LSZ_F0] = (self::LSZ_CONVBIN|self::LSZ_CONVRECOV);
$txHdr[self::LSZ_F1] = 0; /* No managment */
$txHdr[self::LSZ_F2] = 0; /* No compression/encryption */
$txHdr[self::LSZ_F3] = 0; /* No sparse files or variable headers */
if (($rc=$this->ls_zsendbhdr(self::ZFILE,$txHdr)) < 0)
return $rc;
if (($rc=$this->ls_zsenddata($buf,self::ZCRCW)) < 0)
return $rc;
$retransmit = 0;
$trys++;
}
switch (($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$this->ls_HeaderTimeout))) {
/* Ok, he want our file */
case self::ZRPOS:
$pos = $this->ls_fetchlong($this->ls_rxHdr);
return self::ZRPOS;
/* Skip */
case self::ZSKIP:
/* Refuse */
case self::ZFERR:
/* Check for double-skip protection */
$sn = $this->ls_fetchlong($this->ls_rxHdr);
/* Here is skip protection */
if ($this->ls_SkipGuard && $sn && ($sn == $sernum-1)) {
if (($rc=$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0))) < 0)
return $rc;
/* We don't need to skip this file */
break;
} elseif ($sn != $sernum) {
$this->ls_SkipGuard = 0;
}
/* Fall through */
/* Abort this session */
case self::ZABORT:
/* Finish this session */
case self::ZFIN:
return $rc;
/* Send CRC to peer */
case self::ZCRC:
$len = $this->ls_fetchlong($this->ls_rxHdr);
if (! $len)
$len = $send->size;
$cnt = 0;
$send->seek(0);
while (($cnt++ < $len) && (($c=$send->read(1)) > 0))
$crc = $this->CRC32_UPDATE($c,$crc);
$crc = $this->CRC32_FINISH($crc);
if (($rc=$this->ls_zsendhhdr(self::ZCRC,$this->ls_storelong($crc))) < 0)
return $rc;
break;
case self::ZRINIT:
break;
case self::ZNAK:
case self::LSZ_TIMEOUT:
$retransmit = 1;
break;
case self::LSZ_BADCRC:
if (($rc=$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0))) < 0)
return $rc;
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
}
} while ($trys < 10);
Log::error(sprintf('%s: ? Something strange or timeout [%d]',__METHOD__,$rc));
return $rc;
}
/* Send HEX header. Use CRC16, send var. len. if could */
private function ls_zsendhhdr(int $frametype,array $hdr): int
{
if ($this->DEBUG)
Log::debug(sprintf('%s: + Start',__METHOD__));
/* Send **<DLE> */
$this->client->buffer_add(chr(self::ZPAD).chr(self::ZPAD).chr(self::ZDLE));
/* Send header type */
if ($this->ls_Protocol&self::LSZ_OPTVHDR) {
$this->client->buffer_add(chr(self::ZVHEX));
$this->ls_sendhex(count($hdr));
} else {
$this->client->buffer_add(chr(self::ZHEX));
}
$this->ls_sendhex($frametype);
$crc = $this->CRC16USD_UPDATE($frametype,self::LSZ_INIT_CRC16);
/* Send whole header */
for ($n=0;$n<count($hdr);$n++) {
$this->ls_sendhex($hdr[$n]);
$crc = $this->CRC16USD_UPDATE((0xff&$hdr[$n]),$crc);
}
$crc = ($crc&0xffff);
$this->ls_sendhex($crc >> 8);
$this->ls_sendhex($crc&0xff);
$this->client->buffer_add(chr(self::CR));
$this->client->buffer_add(chr(self::LF|0x80));
if ($frametype != self::ZACK && $frametype != self::ZFIN)
$this->client->buffer_add(chr(self::XON));
/* Clean buffer, do real send */
return $this->client->buffer_flush($this->ls_HeaderTimeout);
}
/**
* Send ZSINIT and wait for ZACK, skip ZRINIT, ZCOMMAND, answer on ZCHALLENGE
*
* @param string $attstr
* @return int
* @throws \Exception
*/
private function ls_zsendsinit(string $attstr): int
{
Log::debug(sprintf('%s: + Start [%s]',__METHOD__,$attrstr));
$trys = 0;
$retransmit = 1;
if ($attstr) {
if (strlen($attstr) > self::LSZ_MAXATTNLEN-1)
$attstr = substr($attrstr,LSZ_MAXATTNLEN);
$this->txbuf = $attrstr;
} else {
$this->txbuf = '';
}
do {
if (retransmit) {
/* We don't support ESC8, so don't ask for it in any case */
$txHdr = [];
$txHdr[self::LSZ_F0] = ($this->ls_Protocol&self::LSZ_OPTESCAPEALL) ? self::LSZ_TXWNTESCCTL : 0;
$txHdr[self::LSZ_F1] = $txHdr[self::LSZ_F2] = $txHdr[self::LSZ_F3] = 0;
if (($rc=$this->ls_zsendbhdr(self::ZSINIT,$txHdr)) < 0)
return $rc;
if ($rc=$this->ls_zsenddata($this->txbuf,self::ZCRCW))
return $rc;
$retransmit = 0;
$trys++;
}
switch (($rc=$this->ls_zrecvhdr($this->ls_rxHdr,$this->ls_HeaderTimeout))) {
/* Skip it */
case self::ZRINIT:
break;
/* Ok */
case self::ZACK:
return self::LSZ_OK;
/* Return number to peer, he is paranoid */
case self::ZCHALLENGE:
if (($rc=$this->ls_zsendhhdr(self::ZACK,$this->ls_rxHdr)) < 0)
return $rc;
break;
case self::LSZ_BADCRC:
case self::ZCOMMAND:
if (($rc=$this->ls_zsendhhdr(self::ZNAK,$this->ls_storelong(0))) < 0)
return $rc;
break;
/* Retransmit */
case ZNAK:
case LSZ_TIMEOUT:
$retransmit = 1;
break;
default:
Log::error(sprintf('%s: ? Something strange [%d]',__METHOD__,$rc));
if ($rc < 0)
return $rc;
}
} while ($trys < 10);
Log::error(sprintf('%s: ? Something strange or timeout [%d]',__METHOD__,$rc));
return $rc;
}
}