clrghouz/app/helpers.php

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<?php
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use Carbon\Carbon;
use Illuminate\Support\Collection;
use App\Models\{Address,Domain,Setup,Zone};
/**
* Calculate CCITT-CRC16 checksum
*/
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if (! function_exists('crc16')) {
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function crc16($data): int
{
$crc = 0x0000;
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for ($i = 0; $i < strlen($data); $i++) {
$x = (($crc >> 8) ^ ord($data[$i])) & 0xFF;
$x ^= $x >> 4;
$crc = (($crc << 8) ^ ($x << 12) ^ ($x << 5) ^ $x) & 0xFFFF;
}
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return $crc;
}
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}
/**
* Dump out data into a hex dump
*/
if (! function_exists('hex_dump')) {
function hex_dump($data,$newline="\n",$width=16): string
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{
$result = '';
$pad = '.'; # padding for non-visible characters
$to = $from = '';
for ($i=0; $i<=0xFF; $i++) {
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$from .= chr($i);
$to .= ($i >= 0x20 && $i <= 0x7E) ? chr($i) : $pad;
}
$hex = str_split(bin2hex($data),$width*2);
$chars = str_split(strtr($data,$from,$to),$width);
$offset = 0;
foreach ($hex as $i => $line) {
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$result .= sprintf('%08X: %-48s [%s]%s',
$offset,
substr_replace(implode(' ',str_split($line,2)),' ',8*3,0),
$chars[$i],
$newline);
$offset += $width;
}
return $result;
}
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}
/**
* Send a value has hex chars
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*/
if (! function_exists('hexstr')) {
function hexstr(int $int): string
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{
if ($int > 0xffff)
throw new Exception('Int too large for hexstr');
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$hexdigitslower = '0123456789abcdef';
$x = '';
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if ($int > 0xff) {
$x .= substr($hexdigitslower,($int&0xf000)>>12,1);
$x .= substr($hexdigitslower,($int&0x0f00)>>8,1);
}
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$x .= substr($hexdigitslower,($int&0x00f0)>>4,1);
$x .= substr($hexdigitslower,($int&0x000f),1);
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return $x;
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}
}
/**
* Return our addresses.
* If zone provided, limit the list to those within the zone
*
* @param Domain|NULL $do Limit the addresses for the specific domain
* @param Address|null $ao If address is presented, show the address we use when talking to that address
* @return Collection|Address|NULL
*/
function our_address(Domain $do=NULL,Address $ao=NULL): Collection|Address|NULL
{
static $so = NULL;
static $our = NULL;
if (! $so)
$so = Setup::findOrFail(config('app.id'));
if (! $our) {
$so->load(['system.akas.zone.domain']);
$our = $so->system->akas;
}
$filter = $our;
if ($do)
$filter = $our->filter(function($item) use ($do) { return $item->zone->domain_id === $do->id; })->sortBy('role');
// If we are looking for a specific address, and there is only 1 result, return it, otherwise return what we have
if ($ao && config('fido.strict') && ($x=$filter->filter(function($item) use ($ao) { return $item->role <= $ao->role; })->sortBy('role'))->count())
$our = $x;
return $ao ? $our->last() : ($do ? $filter : $our);
}
/**
* Return a list of nodes that collect mail directly from us
*
* @param Domain|NULL $do
* @return Collection
*/
function our_nodes(Domain $do=NULL): Collection
{
return Address::select(['addresses.id','addresses.zone_id','region_id','host_id','node_id','point_id','addresses.system_id','role'])
->join('system_zone',['system_zone.system_id'=>'addresses.system_id','system_zone.zone_id'=>'addresses.zone_id'])
->when(! is_null($do),function($query) use ($do) {
return $query
->join('zones',['zones.id'=>'addresses.zone_id'])
->where('domain_id',$do->id);
})
->active()
->FTNorder()
->get();
}
if (! function_exists('timew')) {
/**
* Convert a time into an 32 bit value. This is primarily used to create 8 character hex filenames that
* are unique using 1/10th second precision.
*
* Time is:
* + 02 bits least significant bits of year - giving us a 4 year timestamp
* + 04 bits Month
* + 05 bits Day
* + 05 bits Hour
* + 06 bits Min
* + 06 bits Sec
* + 04 bits 10th Sec
* = 32 bits
*
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* @param Carbon|null $time
* @return int
* @todo Since this is used as part of our msgid, we need to use the first 2 bits to get our 3 year unique msgid, ie: year&0x03
*/
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function timew(Carbon $time=NULL): int
{
static $delay = 0;
// If we are not passed a time, we'll use the time now
if (! $time) {
// In case we are called twice, we'll delay 1/10th second so we have a unique result.
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if (Carbon::now()->getPreciseTimestamp(1) === $delay)
usleep(100000);
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$time = Carbon::now();
}
$delay = $time->getPreciseTimestamp(1);
$t = 0;
$t = ($t | $time->year & 0x3) << 4;
$t = ($t | ($time->month & 0xf)) << 5;
$t = ($t | ($time->day & 0x1f)) << 5;
$t = ($t | ($time->hour & 0x1f)) << 6;
$t = ($t | ($time->minute & 0x3f)) << 6;
$t = ($t | ($time->second & 0x3f)) << 4;
$t = ($t | ((int)($time->milli/100)) & 0xf);
return $t;
}
}
if (! function_exists('wtime')) {
/**
* Convert a 40 bit integer into a time.
* We need to filter out loose bits, ie:
* + year all bits valid
* + month 11xx and 0000 are invalid
* + day all bits valid except 0000
* + hour 11xxx are invalid
* + min 1111xx are invalid
* + sec 1111xx are invalid
* + 1/2 11xx, 101x are invalid
* @see timew()
*
* @param int $time
* @param int|null $year
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* @return Carbon
*/
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function wtime(int $time,int $year=NULL): Carbon
{
if (! $year)
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$year = Carbon::now()->year;
// Does the time have milli seconds?
if ($time > pow(2,26)-1) {
$milli = ($time & 0xf);
$time = $time >> 4;
if ($milli > 9)
$milli = 9;
} else {
$milli = 0;
}
$sec = ($time & 0x3f);
if ($sec > 59)
$sec = 59;
$time = $time >> 6;
$min = ($time & 0x3f);
if ($min > 59)
$min = 59;
$time = $time >> 6;
$hr = ($time & 0x1f);
if ($hr > 23)
$hr = 23;
$time = $time >> 5;
$day = ($time & 0x1f);
$time = $time >> 5;
$month = ($time & 0xf);
if ($month > 12)
$month = 12;
$time = $time >> 4;
return Carbon::create(($year & 0xffc)+$time,$month,$day,$hr,$min,$sec+$milli/10);
}
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}