<?php namespace App\Classes\FTN\Packet; use Illuminate\Support\Arr; use App\Classes\FTN\Packet; use App\Models\Setup; /** * FSC-0048 http://ftsc.org/docs/fsc-0048.002 * * Commonly known as Type 2+ packets, based on FSC-0039 with improved support for FTS-0001 */ final class FSC48 extends Packet { protected const HEADER = [ 'onode' => [0x00,'v',2], // Orig Node 'dnode' => [0x02,'v',2], // Dest Node 'y' => [0x04,'v',2], // Year 'm' => [0x06,'v',2], // Month 'd' => [0x08,'v',2], // Day 'H' => [0x0a,'v',2], // Hour 'M' => [0x0c,'v',2], // Minute 'S' => [0x0e,'v',2], // Second 'baud' => [0x10,'v',2], // Baud 'type' => [0x12,'v',2], // Packet Version (should be 2) 'onet' => [0x14,'v',2], // Orig Net (0xFFFF when OrigPoint != 0) 'dnet' => [0x16,'v',2], // Dest Net 'prodcode-lo' => [0x18,'C',1], // Product Code Lo 'prodrev-maj' => [0x19,'C',1], // Product Version Major 'password' => [0x1a,'a8',8], // Packet Password 'ozone' => [0x22,'v',2], // Orig Zone 'dzone' => [0x24,'v',2], // Dest Zone 'auxnet' => [0x26,'v',2], // Aux Net 'capvalid' => [0x28,'n',2], // fsc-0039.004 (copy of 0x2c) 'prodcode-hi' => [0x2a,'C',1], // Product Code Hi 'prodrev-min' => [0x2b,'C',1], // Product Version Minor 'capword' => [0x2c,'v',2], // Capability Word 'dozone' => [0x2e,'v',2], // Orig Zone 'ddzone' => [0x30,'v',2], // Dest Zone 'opoint' => [0x32,'v',2], // Orig Point 'dpoint' => [0x34,'v',2], // Dest Point 'proddata' => [0x36,'a4',4], // ProdData ]; public const TYPE = '2+'; public function __get($key) { switch ($key) { case 'capability': return sprintf('%016b',Arr::get($this->header,'capword')); default: return parent::__get($key); } } /** * Create our message packet header */ protected function header(): string { try { return pack(collect(self::HEADER)->pluck(1)->join(''), $this->ff, // Orig Node $this->tf, // Dest Node Arr::get($this->header,'y'), // Year Arr::get($this->header,'m'), // Month Arr::get($this->header,'d'), // Day Arr::get($this->header,'H'), // Hour Arr::get($this->header,'M'), // Minute Arr::get($this->header,'S'), // Second 0, // Baud 2, // Packet Version (should be 2) $this->fp ? 0xffff : $this->fn, // Orig Net (0xFFFF when OrigPoint != 0) $this->tn, // Dest Net (Setup::PRODUCT_ID & 0xff), // Product Code Lo Setup::PRODUCT_VERSION_MAJ, // Product Version Major $this->password, // Packet Password $this->fz, // Orig Zone $this->tz, // Dest Zone $this->fp ? $this->fn : 0x00, // Aux Net Arr::get($this->header,'capvalid',1<<0), // fsc-0039.004 (copy of 0x2c) ((Setup::PRODUCT_ID >> 8) & 0xff), // Product Code Hi Setup::PRODUCT_VERSION_MIN, // Product Version Minor Arr::get($this->header,'capword',1<<0), // Capability Word $this->fz, // Orig Zone $this->tz, // Dest Zone $this->fp, // Orig Point $this->tp, // Dest Point strtoupper(hexstr(Setup::PRODUCT_ID)), // ProdData ); } catch (\Exception $e) { return $e->getMessage(); } } /** * Determine if this is a fsc-0045 packet * * @param string $header * @return bool * @throws \Exception */ public static function is_type(string $header): bool { $head = unpack(self::unpackheader(self::HEADER),$header); return ( (Arr::get($head,'type') === 2) && (Arr::get($head,'capword') === Arr::get($head,'capvalid')) && ((Arr::get($head,'opoint') === 0) || (Arr::get($head,'onet') === 0xffff)) && Arr::get($head,'auxnet') ); } }