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Handle up to 2GB payload on PHP32bits #65

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merged 3 commits into from
Aug 13, 2022
Merged

Handle up to 2GB payload on PHP32bits #65

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c018f30
Handle 2GB payload on PHP32bits
Domochip Dec 16, 2021
0050245
Raise error if frame is over 2GB on 32bits PHP
Domochip Jun 30, 2022
93050e6
typo
Domochip Jun 30, 2022
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6 changes: 6 additions & 0 deletions src/Messaging/MessageBuffer.php
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Original file line number Diff line number Diff line change
Expand Up @@ -158,10 +158,12 @@ public function onData($data) {
$payloadLenBytes = $payload_length === 126 ? 2 : 8;
$headerSize += $payloadLenBytes;
$bytesToUpack = substr($data, $frameStart + 2, $payloadLenBytes);
$payloadLenOver2GB = false

if ($payload_length === 126){
$payload_length = unpack('n', $bytesToUpack)[1];
} else {
$payloadLenOver2GB = unpack('N', $bytesToUpack)[1] > 0; //Decode only the 4 first bytes
if (PHP_INT_SIZE == 4) { // if 32bits PHP
$bytesToUpack = substr($bytesToUpack, 4); //Keep only 4 last bytes
$payload_length = unpack('N', $bytesToUpack)[1];
Expand All @@ -178,6 +180,10 @@ public function onData($data) {
$closeFrame = $this->newCloseFrame(Frame::CLOSE_PROTOCOL, 'Invalid frame length');
}

if (!$closeFrame && PHP_INT_SIZE == 4 && $payloadLenOver2GB) {
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$closeFrame = $this->newCloseFrame(Frame::CLOSE_TOO_BIG, 'Frame over 2GB can\'t be handled on 32bits PHP');
}

if (!$closeFrame && $this->maxFramePayloadSize > 1 && $payload_length > $this->maxFramePayloadSize) {
$closeFrame = $this->newCloseFrame(Frame::CLOSE_TOO_BIG, 'Maximum frame size exceeded');
}
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