308 lines
9.0 KiB
PHP
308 lines
9.0 KiB
PHP
<?php
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namespace App\Classes\FTN;
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use Carbon\Carbon;
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use Illuminate\Support\Arr;
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use Illuminate\Support\Collection;
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use Illuminate\Support\Facades\Log;
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use Symfony\Component\HttpFoundation\File\File;
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use App\Classes\FTN as FTNBase;
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use App\Models\Software;
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use App\Traits\GetNode;
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class Packet extends FTNBase
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{
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//use GetNode;
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private const LOGKEY = 'PKT';
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private const HEADER_LEN = 0x3a;
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private const VERSION_OFFSET = 0x12;
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private const BLOCKSIZE = 1024;
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private const PACKED_MSG_HEADER_LEN = 0x22;
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public File $file; // Packet filename
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public Collection $messages; // Messages in the Packet
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private array $header; // Packet Header
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// V2 Packet Header (2/2e/2+)
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private const v2header = [
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'onode' => [0x00,'v',2], // Originating Node
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'dnode' => [0x02,'v',2], // Destination Node
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'y' => [0x04,'v',2], // Year
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'm' => [0x06,'v',2], // Month
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'd' => [0x08,'v',2], // Day
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'H' => [0x0a,'v',2], // Hour
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'M' => [0x0c,'v',2], // Minute
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'S' => [0x0e,'v',2], // Second
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'baud' => [0x10,'v',2], // Baud
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'pktver' => [0x12,'v',2], // Packet Version
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'onet' => [0x14,'v',2], // Originating Net (0xffff when origPoint !=0 2+)
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'dnet' => [0x16,'v',2], // Destination Net
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'prodcode-lo' => [0x18,'C',1],
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'prodrev-maj' => [0x19,'C',1], // Product Version Major (serialNum 2)
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'password' => [0x1a,'Z8',8], // Packet Password
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'qozone' => [0x22,'v',2],
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'qdzone' => [0x24,'v',2],
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'filler' => [0x26,'v',2], // Reserved (auxnet 2+ - contains Orignet if Origin is a point) fsc-0048.001
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'capvalid' => [0x28,'n',2], // fsc-0039.004 (Not used 2) (copy of 0x2c)
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'prodcode-hi' => [0x2a,'C',1], // (Not used 2)
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'prodrev-min' => [0x2b,'C',1], // (Not used 2)
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'capword' => [0x2c,'v',2], // fsc-0039.001 (Not used 2)
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'ozone' => [0x2e,'v',2], // Originating Zone (Not used 2)
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'dzone' => [0x30,'v',2], // Destination Zone (Not used 2)
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'opoint' => [0x32,'v',2], // Originating Point (Not used 2)
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'dpoint' => [0x34,'v',2], // Destination Point (Not used 2)
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'proddata' => [0x36,'A4',4], // ProdData (Not used 2) // FSC-39/FSC-48
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];
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public function __construct(File $file)
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{
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$this->messages = collect();
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if ($file) {
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$this->file = $file;
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$this->open($file);
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}
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}
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/**
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* @throws \Exception
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*/
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public function __get($key)
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{
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switch ($key) {
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// From Addresses
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case 'fz': return Arr::get($this->header,'ozone');
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case 'fn': return Arr::get($this->header,'onet');
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case 'ff': return Arr::get($this->header,'onode');
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case 'fp': return Arr::get($this->header,'opoint');
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case 'fd': return Arr::get($this->header,'odomain');
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// To Addresses
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case 'tz': return Arr::get($this->header,'dzone');
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case 'tn': return Arr::get($this->header,'dnet');
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case 'tf': return Arr::get($this->header,'dnode');
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case 'tp': return Arr::get($this->header,'dpoint');
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case 'td': return Arr::get($this->header,'ddomain');
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case 'date':
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return Carbon::create(
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Arr::get($this->header,'y'),
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Arr::get($this->header,'m')+1,
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Arr::get($this->header,'d'),
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Arr::get($this->header,'H'),
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Arr::get($this->header,'M'),
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Arr::get($this->header,'S')
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);
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case 'capability':
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return Arr::get($this->header,'capword') == Arr::get($this->header,'capvalid') ? sprintf('%016b',Arr::get($this->header,'capword')) : 'FTS-1';
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case 'password':
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return Arr::get($this->header,$key);
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case 'fftn':
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case 'tftn':
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return parent::__get($key);
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case 'software':
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$code = Arr::get($this->header,'prodcode-hi')<<8|Arr::get($this->header,'prodcode-lo');
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Software::unguard();
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$o = Software::singleOrNew(['code'=>$code,'type'=>Software::SOFTWARE_TOSSER]);
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Software::reguard();
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return $o;
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case 'software_ver':
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return sprintf('%d.%d',Arr::get($this->header,'prodrev-maj'),Arr::get($this->header,'prodrev-min'));
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// Packet Type
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case 'type':
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if ((Arr::get($this->header,'onet') == 0xffff) && (Arr::get($this->header,'opoint') != 0) && Arr::get($this->header,'filler'))
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return '2+';
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elseif (Arr::get($this->header,'prodrev-maj') && ! Arr::get($this->header,'capword'))
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return '2';
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else
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return '2e';
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default:
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throw new \Exception('Unknown key: '.$key);
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}
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}
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// @note - messages in this object have the same next destination
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// @todo To rework
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/*
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public function __toString(): string
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{
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// @todo - is this appropriate to set here
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$this->date = now();
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$this->pktsrc = (string)$this->get_node(ftn_address_split('10:1/5.0'),TRUE);
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// @todo
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if ($this->messages->first()->type == 'echomail')
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$this->pktdst = (string)$this->messages->first()->fqfa->uplink;
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else
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$this->pktdst = (string)$this->messages->first()->fqda->uplink;
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$this->software['prodcode-lo'] = 0x00;
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$this->software['prodcode-hi'] = 0xde;
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$this->software['rev-maj'] = 0x00;
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$this->software['rev-min'] = 0x01;
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// Type 2+ Packet
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$this->cap['valid'] = 0x0100;
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$this->cap['word'] = 0x0001;
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$this->pktver = 0x0002;
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$return = $this->createHeader();
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foreach ($this->messages as $o)
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$return .= "\02\00".(string)$o;
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$return .= "\00\00";
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return $return;
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}
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*/
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/**
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* Create our message packet header
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* @todo To rework
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*/
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/*
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private function createHeader(): string
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{
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try {
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$a = pack(join('',collect($this->pack1)->pluck(1)->toArray()),
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$this->ff,
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$this->tf,
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$this->date->year,
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$this->date->month,
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$this->date->day,
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$this->date->hour,
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$this->date->minute,
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$this->date->second,
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$this->baud,
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$this->pktver,
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$this->fn, // @todo if point, this needs to be 0xff
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$this->tn,
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$this->software['prodcode-lo'], // @todo change to this software
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$this->software['rev-maj'] // @todo change to this software
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);
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$b = pack(join('',collect($this->pack2)->pluck(1)->toArray()),
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0x0000, // @note: Type 2 packet this is $this->sz,
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0x0000, // @note: Type 2 packet this is $this->dz,
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0x0000, // Filler $this->>sn if message to point.
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$this->cap['valid'], // @todo to check
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$this->software['prodcode-hi'], // @todo change to this software
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$this->software['rev-min'], // @todo change to this software
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$this->cap['word'], // @todo to check
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$this->fz,
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$this->tz,
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$this->fp, // @note: point address, type 2+ packets
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$this->tp // @note: point address, type 2+ packets
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);
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return $a.pack('a8',strtoupper($this->password)).$b."mbse"; // @todo change to this software
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} catch (\Exception $e) {
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return $e->getMessage();
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}
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}
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public function addMessage(FTNMessage $o)
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{
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// @todo Check that this message is for the same uplink.
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$this->messages->push($o);
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}
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*/
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/**
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* Open a packet file
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*
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* @param string $file
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* @throws InvalidPacketException
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*/
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private function open(string $file)
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{
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Log::debug(sprintf('%s:Opening Packet [%s]',self::LOGKEY,$file));
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$f = fopen($file,'r');
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$fstat = fstat($f);
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// PKT Header
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$header = fread($f,self::HEADER_LEN);
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Log::debug(sprintf("%s:\n%s",self::LOGKEY,hex_dump($header)));
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// Could not read header
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if (strlen($header) != self::HEADER_LEN)
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throw new InvalidPacketException(sprintf('Length of header [%d] too short'.strlen($header)));
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// Not a type 2 packet
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$version = Arr::get(unpack('vv',substr($header,self::VERSION_OFFSET)),'v');
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if ($version != 2)
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throw new InvalidPacketException('Not a type 2 packet: '.$version);
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$this->header = unpack($this->unpackheader(self::v2header),$header);
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$x = fread($f,2);
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// End of Packet?
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if (strlen($x) == 2 and $x == "\00\00")
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return;
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// Messages start with 02H 00H
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if (strlen($x) == 2 AND $x != "\02\00")
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throw new InvalidPacketException('Not a valid packet: '.bin2hex($x));
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// No message attached
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else if (! strlen($x))
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throw new InvalidPacketException('No message in packet: '.bin2hex($x));
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$buf_ptr = 0;
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$message = '';
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$readbuf = '';
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while ($buf_ptr || (! feof($f) && ($readbuf=fread($f,self::BLOCKSIZE)))) {
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// A message header is atleast 0x22 chars long
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if (strlen($readbuf) < self::PACKED_MSG_HEADER_LEN) {
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$message .= $readbuf;
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$buf_ptr = 0;
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continue;
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} elseif (strlen($message) < self::PACKED_MSG_HEADER_LEN) {
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$addchars = self::PACKED_MSG_HEADER_LEN-strlen($message);
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$message .= substr($readbuf,$buf_ptr,$addchars);
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$buf_ptr += $addchars;
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}
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// If we didnt find a packet end, perhaps there are no more
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if (($end=strpos($readbuf,"\x00\x02\x00",$buf_ptr)) === FALSE)
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$end = strpos($readbuf,"\x00\x00\x00",$buf_ptr);
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// See if we have found the end of the packet, if not read more.
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if ($end === FALSE && (ftell($f) < $fstat['size'])) {
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$message .= substr($readbuf,$buf_ptr);
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$buf_ptr = 0;
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continue;
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} else {
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$message .= substr($readbuf,$buf_ptr,$end-$buf_ptr);
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$buf_ptr += $end-$buf_ptr+3;
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if ($buf_ptr >= strlen($readbuf))
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$buf_ptr = 0;
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}
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// Look for the next message
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$this->messages->push(new Message($message));
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$message = '';
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}
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}
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} |