475 lines
13 KiB
PHP
475 lines
13 KiB
PHP
<?php
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namespace App\Classes\FTN;
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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\Validator;
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use Illuminate\Validation\Validator as ValidatorResult;
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use App\Classes\FTN as FTNBase;
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use App\Models\Address;
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use App\Rules\TwoByteInteger;
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use App\Traits\GetNode;
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/**
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* Class Message
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* NOTE: FTN Echomail Messages are ZONE agnostic.
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*
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* @package App\Classes
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*/
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class Message extends FTNBase
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{
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//use GetNode;
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// Single value kludge items
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private array $_kludge = [
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'chrs' => 'CHRS: ',
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'charset' => 'CHARSET: ',
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'codepage' => 'CODEPAGE: ',
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'msgid' => 'MSGID: ',
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'pid' => 'PID: ',
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'replyid' => 'REPLY: ',
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'tid' => 'TID: ',
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'tzutc' => 'TZUTC: ',
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];
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// Flags for messages
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public const FLAG_PRIVATE = 1<<0;
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public const FLAG_CRASH = 1<<1;
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public const FLAG_RECD = 1<<2;
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public const FLAG_SENT = 1<<3;
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public const FLAG_FILEATTACH = 1<<4;
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public const FLAG_INTRANSIT = 1<<5;
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public const FLAG_ORPHAN = 1<<6;
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public const FLAG_KILLSENT = 1<<7;
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public const FLAG_LOCAL = 1<<8;
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public const FLAG_HOLD = 1<<9;
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public const FLAG_UNUSED_10 = 1<<10;
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public const FLAG_FREQ = 1<<11;
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public const FLAG_RETRECEIPT = 1<<12;
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public const FLAG_ISRETRECEIPT = 1<<13;
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public const FLAG_AUDITREQ = 1<<14;
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public const FLAG_FILEUPDATEREQ = 1<<15;
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public const FLAG_ECHOMAIL = 1<<16;
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// FTS-0001.016 Message header 32 bytes node, net, flags, cost, date
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private const HEADER_LEN = 0x20; // Length of message header
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private const header = [ // Struct of message header
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'onode' => [0x00,'v',2], // Originating Node
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'dnode' => [0x02,'v',2], // Destination Node
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'onet' => [0x04,'v',2], // Originating Net
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'dnet' => [0x06,'v',2], // Destination Net
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'flags' => [0x08,'v',2], // Message Flags
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'cost' => [0x0a,'v',2], // Send Cost
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'date' => [0x0c,'A20',20] // Message Date FTS-0001.016 Date: upto 20 chars null terminated
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];
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private const USER_FROM_LEN = 36; // FTS-0001.016 From Name: upto 36 chars null terminated
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private const USER_TO_LEN = 36; // FTS-0001.016 To Name: upto 36 chars null terminated
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private const SUBJECT_LEN = 72; // FTS-0001.016 Subject: upto 72 chars null terminated
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private const AREATAG_LEN = 35; //
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private ?ValidatorResult $errors = NULL; // Packet validation
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private array $header; // Message Header
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private Collection $kludge; // Hold kludge items
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private string $user_from; // User message is From
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private string $user_to; // User message is To
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private string $subject; // Message subject
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private string $message; // The actual message content
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private string $origin; // FTS-0004.001
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private ?string $echoarea = NULL; // FTS-0004.001
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private array $zone; // Zone the message belongs to. (src/dst - for netmail)
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private array $netmail; // Netmail details
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private Collection $path; // FTS-0004.001 The message PATH lines
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private Collection $seenby; // FTS-0004.001 The message SEEN-BY lines
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private Collection $via; // The path the message has gone using Via lines (Netmail)
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private Collection $_other; // Temporarily hold attributes we dont process yet.
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private Collection $unknown; // Temporarily hold attributes we have no logic for.
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public function __construct(string $msg)
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{
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$this->kludge = collect();
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$this->path = collect();
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$this->seenby = collect();
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$this->via = collect();
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$this->_other = collect();
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$this->unknown = collect();
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$this->zone = [];
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$this->header = unpack($this->unpackheader(self::header),substr($msg,0,self::HEADER_LEN));
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$ptr = 0;
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// To User
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$this->user_to = strstr(substr($msg,self::HEADER_LEN+$ptr),"\x00",TRUE);
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$ptr += strlen($this->user_to)+1;
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// From User
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$this->user_from = strstr(substr($msg,self::HEADER_LEN+$ptr),"\x00",TRUE);
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$ptr += strlen($this->user_from)+1;
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// Subject
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$this->subject = strstr(substr($msg,self::HEADER_LEN+$ptr),"\x00",TRUE);
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$ptr += strlen($this->subject)+1;
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// Check if this is an Echomail
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if (! strncmp(substr($msg,self::HEADER_LEN+$ptr),'AREA:',5)) {
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$this->echoarea = substr($msg,self::HEADER_LEN+$ptr+5,strpos($msg,"\r",self::HEADER_LEN+$ptr+5)-(self::HEADER_LEN+$ptr+5));
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$ptr += strlen($this->echoarea)+5+1;
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}
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$this->parseMessage(substr($msg,self::HEADER_LEN+$ptr));
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if (($x=$this->validate()->getMessageBag())->count())
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Log::debug('Message fails validation',['result'=>$x]);
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}
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public function __get($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->zone,'src',0);
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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 0; // @todo
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// To Addresses
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// Echomail doesnt have a zone, so we'll use the source zone
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case 'tz': return Arr::get($this->zone,$this->echoarea ? 'src' : 'dst',0);
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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 0; // @todo
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case 'fftn':
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case 'tftn':
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return parent::__get($key);
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case 'date':
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return sprintf('%s (%s)',Arr::get($this->header,$key),$this->kludge->get('tzutc'));
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case 'flags':
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case 'cost': return Arr::get($this->header,$key);
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case 'msgid': return $this->kludge->get('msgid');
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case 'message':
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case 'subject':
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case 'user_to':
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case 'user_from':
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case 'kludge':
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case 'path':
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case 'seenby':
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case 'errors':
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case 'echoarea':
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return $this->{$key};
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/*
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case 'tearline':
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return '--- FTNHub';
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*/
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default:
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throw new \Exception('Unknown key: '.$key);
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}
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}
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/**
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* Export an FTN message, ready for sending.
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*
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* @return string
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* @todo To rework
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*/
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public function __toString(): string
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{
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// if (f->net == 65535) { /* Point packet - Get Net from auxNet */
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$return = '';
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$return .= pack(join('',collect(self::header)->pluck(1)->toArray()),
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$this->ff,
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$this->tf,
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$this->fn,
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$this->tn,
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$this->flags,
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$this->cost
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);
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// @todo use pack for this.
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$return .= $this->date->format('d M y H:i:s')."\00";
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$return .= $this->to."\00";
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$return .= $this->from."\00";
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$return .= $this->subject."\00";
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if ($this->type == 'echomail')
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$return .= "AREA:".$this->echoarea."\r";
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// Add some kludges
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$return .= "\01MSGID ".$this->_fqfa." 1"."\r";
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foreach ($this->_kludge as $k=>$v) {
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if ($x=$this->kludge->get($k))
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$return .= chr(1).$v.$x."\r";
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}
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$return .= $this->message."\r";
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$return .= $this->tearline."\r";
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$return .= $this->origin."\r";
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switch ($this->type)
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{
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case 'echomail':
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break;
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case 'netmail':
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foreach ($this->via as $k=>$v)
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$return .= "\01Via: ".$v."\r";
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// @todo Set product name/version as var
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$return .= sprintf('%sVia: %s @%s.UTC %s %i.%i',
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chr(1),
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'10:0/0',
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now('UTC')->format('Ymd.His'),
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'FTNHub',
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1,1)."\r";
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break;
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}
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$return .= "\00";
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return $return;
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}
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/**
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* Return an array of flag descriptions
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*
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* @return array
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*
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* http://ftsc.org/docs/fsc-0001.000
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* AttributeWord bit meaning
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--- --------------------
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0 + Private
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1 + s Crash
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2 Recd
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3 Sent
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4 + FileAttached
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5 InTransit
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6 Orphan
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7 KillSent
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8 Local
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9 s HoldForPickup
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10 + unused
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11 s FileRequest
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12 + s ReturnReceiptRequest
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13 + s IsReturnReceipt
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14 + s AuditRequest
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15 s FileUpdateReq
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s - this bit is supported by SEAdog only
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+ - this bit is not zeroed before packeting
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*/
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/*
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public function flags(int $flags): array
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{
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return [
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'private' => $this->isFlagSet($flags,self::FLAG_PRIVATE),
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'crash' => $this->isFlagSet($flags,self::FLAG_CRASH),
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'recd' => $this->isFlagSet($flags,self::FLAG_RECD),
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'sent' => $this->isFlagSet($flags,self::FLAG_SENT),
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'killsent' => $this->isFlagSet($flags,self::FLAG_KILLSENT),
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'local' => $this->isFlagSet($flags,self::FLAG_LOCAL),
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];
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}
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private function isFlagSet($value,$flag): bool
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{
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return (($value & $flag) == $flag);
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}
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*/
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/**
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* If this message doesnt have an AREATAG, then its a netmail.
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*
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* @return bool
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*/
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public function isNetmail(): bool
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{
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return ! $this->echoarea;
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}
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/**
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* Extract information out of the message text.
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*
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* @param string $message
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* @throws InvalidPacketException
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*/
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public function parseMessage(string $message): void
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{
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// Remove DOS \n\r
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$message = preg_replace("/\n\r/","\r",$message);
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// Split out the <SOH> lines
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$result = collect(explode("\01",$message))->filter();
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$this->message = '';
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foreach ($result as $v) {
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// Search for \r - if that is the end of the line, then its a kludge
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$x = strpos($v,"\r");
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$t = '';
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// If there are more characters, then put the kludge back into the result, so that we process it.
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if ($x != strlen($v)-1) {
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/**
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* Anything after the origin line is also kludge data.
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*/
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if ($y = strpos($v,"\r * Origin: ")) {
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$this->message .= substr($v,$x+1,$y-$x-1);
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$this->parseOrigin(substr($v,$y));
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// If this is netmail, the FQFA will have been set by the INTL line, we can skip the rest of this
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$matches = [];
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// Capture the fully qualified 4D name from the Origin Line - it tells us the ZONE.
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preg_match('/^.*\((.*)\)$/',$this->origin,$matches);
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// Double check we have an address in the origin line
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if (! Arr::get($matches,1))
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throw new InvalidPacketException(sprintf('No address in Origin?',$matches));
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// Double check, our src and origin match
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$ftn = Address::parseFTN($matches[1]);
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// We'll double check our FTN
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if (($ftn['n'] !== $this->fn) || ($ftn['f'] !== $this->ff)) {
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Log::error(sprintf('FTN [%s] doesnt match message header',$matches[1]),['ftn'=>$ftn]);
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}
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$this->zone['src'] = $ftn['z'];
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// The message is the rest?
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} elseif (strlen($v) > $x+1) {
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$this->message .= substr($v,$x+1);
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}
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$v = substr($v,0,$x+1);
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}
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foreach ($this->_kludge as $a => $b) {
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if ($t = $this->kludge($b,$v)) {
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$this->kludge->put($a,$t);
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break;
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}
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}
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// There is more text.
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if ($t)
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continue;
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// From point: <SOH>"FMPT <point number><CR>
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if ($t = $this->kludge('FMPT ',$v))
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$this->_other->push($t);
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/*
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* The INTL control paragraph shall be used to give information about
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* the zone numbers of the original sender and the ultimate addressee
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* of a message.
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*
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* <SOH>"INTL "<destination address>" "<origin address><CR>
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*/
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elseif ($t = $this->kludge('INTL ',$v)) {
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$this->netmail['intl'] = $t;
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list($this->netmail['dst'],$this->netmail['src']) = explode(' ',$t);
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}
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elseif ($t = $this->kludge('PATH: ',$v))
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$this->path->push($t);
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// To Point: <SOH>TOPT <point number><CR>
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elseif ($t = $this->kludge('TOPT ',$v))
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$this->_other->push($t);
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// <SOH>Via <FTN Address> @YYYYMMDD.HHMMSS[.Precise][.Time Zone] <Program Name> <Version> [Serial Number]<CR>
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elseif ($t = $this->kludge('Via ',$v))
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$this->via->push($t);
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// We got a kludge line we dont know about
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else
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$this->unknown->push(chop($v,"\r"));
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}
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}
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/**
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* Process the data after the ORIGIN
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* There may be kludge lines after the origin - notably SEEN-BY
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*
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* @param string $message
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*/
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private function parseOrigin(string $message)
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{
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// Split out each line
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$result = collect(explode("\r",$message))->filter();
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foreach ($result as $v) {
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foreach ($this->_kludge as $a => $b) {
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if ($t = $this->kludge($b,$v)) {
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$this->kludge->put($a,$t);
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break;
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}
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}
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if ($t = $this->kludge('SEEN-BY: ', $v))
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$this->seenby->push($t);
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elseif ($t = $this->kludge('PATH: ', $v))
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$this->path->push($t);
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elseif ($t = $this->kludge(' \* Origin: ',$v))
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$this->origin = $t;
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// We got unknown Kludge lines in the origin
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else
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$this->unknown->push($v);
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}
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}
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/**
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* Validate details about this message
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*
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* @return \Illuminate\Contracts\Validation\Validator
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*/
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private function validate(): ValidatorResult
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{
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// Check lengths
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$validator = Validator::make([
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'user_from' => $this->user_from,
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'user_to' => $this->user_to,
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'subject' => $this->subject,
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'onode' => $this->fn,
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'dnode' => $this->ff,
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'onet' => $this->tn,
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'dnet' => $this->tf,
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'flags' => $this->flags,
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'cost' => $this->cost,
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'echoarea' => $this->echoarea,
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],[
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'user_from' => 'required|min:1|max:'.self::USER_FROM_LEN,
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'user_to' => 'required|min:1|max:'.self::USER_TO_LEN,
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'subject' => 'required|max:'.self::SUBJECT_LEN,
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'onode' => ['required',new TwoByteInteger],
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'dnode' => ['required',new TwoByteInteger],
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'onet' => ['required',new TwoByteInteger],
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'dnet' => ['required',new TwoByteInteger],
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'flags' => 'required|numeric',
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'cost' => 'required|numeric',
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'echoarea' => 'nullable|max:'.self::AREATAG_LEN,
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]);
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if ($validator->fails())
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$this->errors = $validator;
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return $validator;
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}
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} |