From c018f30d0c39c5012725686a7259c85a1864b57b Mon Sep 17 00:00:00 2001
From: DomoChip <domochip@hotmail.com>
Date: Thu, 16 Dec 2021 12:40:47 +0100
Subject: [PATCH 1/3] Handle 2GB payload on PHP32bits

---
 src/Messaging/MessageBuffer.php | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/Messaging/MessageBuffer.php b/src/Messaging/MessageBuffer.php
index e5d197b..bbc1061 100644
--- a/src/Messaging/MessageBuffer.php
+++ b/src/Messaging/MessageBuffer.php
@@ -158,9 +158,17 @@ public function onData($data) {
                 $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', $bytesToUpack)[1];
+
+                if ($payload_length === 126){
+                    $payload_length = unpack('n', $bytesToUpack)[1];
+                } else {
+                    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;

From 0050245eb4484351643031d6bc92ee0b607a9541 Mon Sep 17 00:00:00 2001
From: DomoChip <domochip@hotmail.com>
Date: Thu, 30 Jun 2022 17:23:29 +0200
Subject: [PATCH 2/3] Raise error if frame is over 2GB on 32bits PHP

---
 src/Messaging/MessageBuffer.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Messaging/MessageBuffer.php b/src/Messaging/MessageBuffer.php
index bbc1061..a751508 100644
--- a/src/Messaging/MessageBuffer.php
+++ b/src/Messaging/MessageBuffer.php
@@ -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', $bytesToUpack)[1];
@@ -178,6 +180,10 @@ public function onData($data) {
                 $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');
             }

From 93050e65a06a3a640d1e3e96b1d7b6f1e2b7b721 Mon Sep 17 00:00:00 2001
From: DomoChip <domochip@hotmail.com>
Date: Thu, 30 Jun 2022 17:38:45 +0200
Subject: [PATCH 3/3] typo

---
 src/Messaging/MessageBuffer.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Messaging/MessageBuffer.php b/src/Messaging/MessageBuffer.php
index a751508..5d6f82b 100644
--- a/src/Messaging/MessageBuffer.php
+++ b/src/Messaging/MessageBuffer.php
@@ -158,7 +158,7 @@ public function onData($data) {
                 $payloadLenBytes = $payload_length === 126 ? 2 : 8;
                 $headerSize      += $payloadLenBytes;
                 $bytesToUpack    = substr($data, $frameStart + 2, $payloadLenBytes);
-                $payloadLenOver2GB = false
+                $payloadLenOver2GB = false;
 
                 if ($payload_length === 126){
                     $payload_length = unpack('n', $bytesToUpack)[1];