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Merge pull request #65 from Domochip/master

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Handle up to 2GB payload on PHP32bits
This commit is contained in:
Chris Boden 2022-08-13 10:30:10 -04:00 committed by GitHub
commit 382a3ed941
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 17 additions and 3 deletions
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20
src/Messaging/MessageBuffer.php
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@ -158,9 +158,19 @@ class MessageBuffer {
$payloadLenBytes = $payload_length === 126 ? 2 : 8;
$headerSize += $payloadLenBytes;
$bytesToUpack = substr($data, $frameStart + 2, $payloadLenBytes);
$payload_length = $payload_length === 126
? unpack('n', $bytesToUpack)[1]
: unpack('J', $bytesToUpack)[1];
$payloadLenOver2GB = false;
if ($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];
} else {
$payload_length = unpack('J', $bytesToUpack)[1];
}
}
}
$closeFrame = null;
@ -170,6 +180,10 @@ class MessageBuffer {
$closeFrame = $this->newCloseFrame(Frame::CLOSE_PROTOCOL, 'Invalid frame length');
}
if (!$closeFrame && PHP_INT_SIZE == 4 && $payloadLenOver2GB) {
$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');
}