492 lines
13 KiB
PHP
492 lines
13 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 Illuminate\Support\Facades\Notification;
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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\{Address,Domain,Software,System,Zone};
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use App\Notifications\Netmails\EchomailBadAddress;
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/**
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* Represents a Fidonet Packet, that contains an array of messages.
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*
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* Thus this object is iterable as an array of Message::class.
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*/
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class Packet extends FTNBase implements \Iterator, \Countable
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{
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private const LOGKEY = 'PKT';
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protected const PACKED_MSG_LEAD = "\02\00";
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protected const PACKED_END = "\00\00";
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public const regex = '([[:xdigit:]]{4})(?:-(\d{4,10}))?-(.+)';
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public const PACKET_TYPES = [
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'2.2' => FTNBase\Packet\FSC45::class,
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'2+' => FTNBase\Packet\FSC48::class,
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'2e' => FTNBase\Packet\FSC39::class,
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'2.0' => FTNBase\Packet\FTS1::class,
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];
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protected array $header; // Packet Header
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protected ?string $name; // Packet name
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public File $file; // Packet filename
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public Collection $messages; // Messages in the Packet
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public Collection $errors; // Messages that fail validation
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protected int $index; // Our array index
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/**
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* @param string|null $header
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* @throws \Exception
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*/
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public function __construct(string $header=NULL)
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{
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$this->messages = collect();
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$this->errors = collect();
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$this->domain = NULL;
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$this->name = NULL;
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if ($header)
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$this->header = unpack(self::unpackheader(static::HEADER),$header);
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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 rtrim(Arr::get($this->header,'odomain',"\x00"));
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// To Addresses
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case 'tz': return Arr::get($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($this->header,'dpoint');
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case 'td': return rtrim(Arr::get($this->header,'ddomain',"\x00"));
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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 'password':
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return rtrim(Arr::get($this->header,$key),"\x00");
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case 'fftn':
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case 'fftn_o':
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case 'tftn':
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case 'tftn_o':
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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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case 'capability':
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// This needs to be defined in child classes, since not all children have it
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return NULL;
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// Packet Type
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case 'type':
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return static::TYPE;
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// Packet name:
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case 'name':
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return $this->{$key} ?: sprintf('%08x',timew());
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default:
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throw new \Exception('Unknown key: '.$key);
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}
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}
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/**
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* Return the packet
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*
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* @return string
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* @throws \Exception
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*/
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public function __toString(): string
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{
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$return = $this->header();
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foreach ($this->messages as $o) {
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if ($o->packed)
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$return .= self::PACKED_MSG_LEAD.$o;
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}
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$return .= "\00\00";
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return $return;
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}
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/* STATIC */
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/**
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* Size of the packet header
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*
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* @return int
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*/
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public static function header_len(): int
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{
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return collect(static::HEADER)->sum(function($item) { return Arr::get($item,2); });
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}
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/**
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* This function is intended to be implemented in child classes to test if the packet
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* is defined by the child object
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*
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* @see self::PACKET_TYPES
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* @param string $header
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* @return bool
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*/
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public static function is_type(string $header): bool
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{
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return FALSE;
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}
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/**
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* Process a packet file
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*
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* @param mixed $f File handler returning packet data
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* @param string $name
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* @param int $size
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* @param Domain|null $domain
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* @return Packet
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* @throws InvalidPacketException
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*/
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public static function process(mixed $f,string $name,int $size,Domain $domain=NULL): self
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{
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Log::debug(sprintf('%s:+ Opening Packet [%s] with size [%d]',self::LOGKEY,$name,$size));
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$o = FALSE;
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$header = '';
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$read_ptr = 0;
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// Determine the type of packet
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foreach (self::PACKET_TYPES as $type) {
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$header_len = $type::header_len();
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// PKT Header
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if ($read_ptr < $header_len) {
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$header .= fread($f,$header_len-$read_ptr);
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$read_ptr = ftell($f);
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}
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// Could not read header
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if (strlen($header) !== $header_len)
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throw new InvalidPacketException(sprintf('Length of header [%d] too short',strlen($header)));
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if ($type::is_type($header)) {
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$o = new $type($header);
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break;
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}
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}
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if (! $o)
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throw new InvalidPacketException('Cannot determine type of packet.');
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$o->name = $name;
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$x = fread($f,2);
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if (strlen($x) === 2) {
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// End of Packet?
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if ($x === "\00\00")
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return $o;
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// Messages start with self::PACKED_MSG_LEAD
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elseif ($x !== self::PACKED_MSG_LEAD)
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throw new InvalidPacketException('Not a valid packet: '.bin2hex($x));
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// No message attached
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} else
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throw new InvalidPacketException('Not a valid packet, not EOP or SOM'.bin2hex($x));
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// Work out the packet zone
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if ($o->fz && ($o->fd || $domain)) {
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$o->zone = Zone::select('zones.*')
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->join('domains',['domains.id'=>'zones.domain_id'])
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->where('zone_id',$o->fz)
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->where('name',$o->fd ?: $domain->name)
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->single();
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// We need not knowing the domain, we use the default zone
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} else {
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$o->zone = Zone::where('zone_id',$o->fz)
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->where('default',TRUE)
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->single();
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}
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// If zone is not set, then we need to use a default zone - the messages may not be from this zone.
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if (! $o->zone) {
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Log::alert(sprintf('%s:! We couldnt work out the packet zone, so we have fallen back to the default for [%d]',self::LOGKEY,$o->fz));
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$o->zone = Zone::where('zone_id',$o->fz)
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->where('default',TRUE)
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->singleOrFail();
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}
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$message = ''; // Current message we are building
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$msgbuf = '';
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$leader = Message::HEADER_LEN+strlen(self::PACKED_MSG_LEAD);
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// We loop through reading from the buffer, to find our end of message tag
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while ((! feof($f) && ($readbuf=fread($f,$leader)))) {
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$read_ptr = ftell($f);
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$msgbuf .= $readbuf;
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// See if we have our EOM/EOP marker
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if ((($end=strpos($msgbuf,"\x00".self::PACKED_MSG_LEAD,$leader)) !== FALSE)
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|| (($end=strpos($msgbuf,"\x00".self::PACKED_END,$leader)) !== FALSE))
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{
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// Parse our message
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$o->parseMessage(substr($msgbuf,0,$end));
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$msgbuf = substr($msgbuf,$end+3);
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continue;
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// If we have more to read
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} elseif ($read_ptr < $size) {
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continue;
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}
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// If we get here
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throw new InvalidPacketException(sprintf('Cannot determine END of message/packet: %s|%s',get_class($o),hex_dump($message)));;
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}
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if ($msgbuf)
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throw new InvalidPacketException(sprintf('Unprocessed data in packet: %s|%s',get_class($o),hex_dump($msgbuf)));
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return $o;
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}
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/**
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* Location of the version
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*
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* @return int
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*/
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public static function version_offset(): int
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{
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return Arr::get(collect(static::HEADER)->get('type'),0);
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}
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public static function version_offset_len(): int
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{
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return Arr::get(collect(static::HEADER)->get('type'),2);
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}
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/* INTERFACE */
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/**
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* Number of messages in this packet
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*/
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public function count(): int
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{
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return $this->messages->count();
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}
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public function current(): Message
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{
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return $this->messages->get($this->index);
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}
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public function key(): mixed
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{
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return $this->index;
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}
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public function next(): void
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{
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$this->index++;
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}
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public function rewind(): void
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{
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$this->index = 0;
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}
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public function valid(): bool
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{
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return (! is_null($this->key())) && $this->messages->has($this->key());
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}
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/* METHODS */
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/**
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* When creating a new packet, set the header.
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*
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* @param Address $oo
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* @param Address $o
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* @param string|null $passwd Override the password used in the packet
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*/
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public function addressHeader(Address $oo,Address $o,string $passwd=NULL): void
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{
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Log::debug(sprintf('%s:+ Creating packet for [%s]',self::LOGKEY,$o->ftn));
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$date = Carbon::now();
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// Create Header
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$this->header = [
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'ozone' => $oo->zone->zone_id, // Orig Zone
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'dzone' => $o->zone->zone_id, // Dest Zone
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'onet' => $oo->host_id ?: $oo->region_id, // Orig Net
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'dnet' => $o->host_id ?: $o->region_id, // Dest Net
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'onode' => $oo->node_id, // Orig Node
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'dnode' => $o->node_id, // Dest Node
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'opoint' => $oo->point_id, // Orig Point
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'dpoint' => $o->point_id, // Dest Point
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'odomain' => $oo->zone->domain->name, // Orig Domain
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'ddomain' => $o->zone->domain->name, // Dest Domain
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'y' => $date->format('Y'), // Year
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'm' => $date->format('m')-1, // Month
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'd' => $date->format('d'), // Day
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'H' => $date->format('H'), // Hour
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'M' => $date->format('i'), // Minute
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'S' => $date->format('s'), // Second
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'password' => strtoupper((! is_null($passwd)) ? $passwd : $o->session('pktpass')), // Packet Password
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];
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}
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/**
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* Add a message to this packet
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*
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* @param Message $o
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*/
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public function addMail(Message $o): void
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{
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$this->messages->push($o);
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}
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/**
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* Parse a message in a mail packet
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*
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* @param string $message
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* @throws InvalidPacketException|\Exception
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*/
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private function parseMessage(string $message): void
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{
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Log::info(sprintf('%s:+ Processing packet message [%d] bytes',self::LOGKEY,strlen($message)));
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$msg = Message::parseMessage($message,$this->zone);
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// If the message from domain is different to the packet address domain, we'll skip this message
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// If the message is invalid, we'll ignore it
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if ($msg->errors) {
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Log::info(sprintf('%s:- Message [%s] has errors',self::LOGKEY,$msg->msgid));
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// If the messages is not for the right zone, we'll ignore it
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if ($msg->errors->messages()->has('invalid-zone')) {
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Log::alert(sprintf('%s:! Message is from an invalid zone [%s], packet is from [%s] - ignoring it',self::LOGKEY,$msg->fftn,$msg->zone->domain->name));
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if (! $msg->rescanned->count())
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Notification::route('netmail',$this->fftn_o)->notify(new EchomailBadAddress($msg));
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return;
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}
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// If the to address doenst exist, we'll create a new entry
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if ($msg->errors->messages()->has('to') && $msg->tzone) {
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try {
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// @todo Need to work out the correct region for the host_id
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Address::unguard();
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$ao = Address::firstOrNew([
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'zone_id' => $msg->tzone->id,
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//'region_id' => 0,
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'host_id' => $msg->tn,
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'node_id' => $msg->tf,
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'point_id' => $msg->tp,
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'active' => TRUE,
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]);
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Address::reguard();
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if (is_null($ao->region_id))
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$ao->region_id = $ao->host_id;
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} catch (\Exception $e) {
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Log::error(sprintf('%s:! Error finding/creating TO address [%s] for message',self::LOGKEY,$msg->tboss),['error'=>$e->getMessage()]);
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$this->errors->push($msg);
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return;
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}
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$ao->role = Address::NODE_UNKNOWN;
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$so = System::createUnknownSystem();
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$so->addresses()->save($ao);
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Log::alert(sprintf('%s:- To FTN is not defined, creating new entry for [%s] (%d)',self::LOGKEY,$msg->tboss,$ao->id));
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}
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// If the from address doenst exist, we'll create a new entry
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if ($msg->errors->messages()->has('from') && $msg->tzone) {
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try {
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// @todo Need to work out the correct region for the host_id
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Address::unguard();
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$ao = Address::firstOrNew([
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'zone_id' => $msg->fzone->id,
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//'region_id' => 0,
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'host_id' => $msg->fn,
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'node_id' => $msg->ff,
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'point_id' => $msg->fp,
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'active'=> TRUE,
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]);
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Address::reguard();
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if (is_null($ao->region_id))
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$ao->region_id = $ao->host_id;
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} catch (\Exception $e) {
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Log::error(sprintf('%s:! Error finding/creating FROM address [%s] for message',self::LOGKEY,$msg->fboss),['error'=>$e->getMessage()]);
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$this->errors->push($msg);
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return;
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}
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$ao->role = Address::NODE_UNKNOWN;
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$so = System::createUnknownSystem();
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$so->addresses()->save($ao);
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Log::alert(sprintf('%s:- From FTN is not defined, creating new entry for [%s] (%d)',self::LOGKEY,$msg->fboss,$ao->id));
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}
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if ($msg->errors->messages()->has('user_from') || $msg->errors->messages()->has('user_to')) {
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Log::error(sprintf('%s:! Skipping message [%s] due to errors (%s)...',self::LOGKEY,$msg->msgid,join(',',$msg->errors->messages()->keys())));
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$this->errors->push($msg);
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return;
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}
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}
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$this->messages->push($msg);
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}
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public function pluck(string $key): Collection
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{
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return $this->messages->pluck($key);
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}
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} |