<?php namespace App\Classes\FTN\Packet; use Illuminate\Support\Arr; use App\Classes\FTN\Packet; use App\Models\Setup; /** * FSC-0045 http://ftsc.org/docs/fsc-0045.001 * * Commonly known as Type 2.2 packets * Supports 5D addressing */ final class FSC45 extends Packet { protected const HEADER = [ 'onode' => [0x00,'v',2], // Orig Node 'dnode' => [0x02,'v',2], // Dest Node 'opoint' => [0x04,'v',2], // Orig Point 'dpoint' => [0x06,'v',2], // Dest Point 'reserved' => [0x08,'a8',8], // Reserved 'subver' => [0x10,'v',2], // Sub Version (should be 2) 'type' => [0x12,'v',2], // Packet Version (should be 2) 'onet' => [0x14,'v',2], // Orig Net 'dnet' => [0x16,'v',2], // Dest Net 'prodcode' => [0x18,'C',1], // Product Code 'prodrev-maj' => [0x19,'C',1], // Product Version 'password' => [0x1a,'a8',8], // Packet Password 'ozone' => [0x22,'v',2], // Orig Zone 'dzone' => [0x24,'v',2], // Dest Zone 'odomain' => [0x26,'a8',8], // Orig Domain 'ddomain' => [0x2e,'a8',8], // Dest Domain 'proddata' => [0x36,'a4',4], // ProdData ]; public const TYPE = '2.2'; /** * 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 $this->fp, // Orig Point $this->tp, // Dest Point '', // Reserved 2, // Sub Version (should be 2) 2, // Packet Version (should be 2) $this->fn, // Orig Net $this->tn, // Dest Net (Setup::PRODUCT_ID & 0xff), // Product Code Setup::PRODUCT_VERSION_MAJ, // Product Version $this->password, // Packet Password $this->fz, // Orig Zone $this->tz, // Dest Zone $this->fd, // Orig Domain $this->td, // Dest Domain 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,'opoint') === 0) || (Arr::get($head,'onet') !== 0xffff)) && (strlen(rtrim(Arr::get($head,'reserved'),"\x00")) === 0) && (Arr::get($head,'subver') === 2) && (Arr::get($head,'odomain')) && (Arr::get($head,'ddomain')) ); } }