WebSocker Server's Connection (fd) Overflow Issue due to continuous increment of Connection Number

[mohsin-devdksa]

Issue Description:

1. If there are three connections, say, 1, 2 and 3 and if connection number 3 reconnects (disconnects and connects again), then the connection id it receives is 4. So integer 3 is available but not re-assignable to next connections. This behavior will create many gap.

2. Secondly, $fd (connection id) may have a maximum value that can store in it. We think that a value greater than that max value will lead to "overflow" in $fd.

Is there any work around this risk ? OR, at that point you will want us to restart the WebSocket Server ?

What version of Swoole are you using (show your php --ri swoole)?

Swoole => enabled
Author => Swoole Team <[[email protected]](mailto:[email protected])>
Version => 5.1.2
Built => Aug 15 2024 12:06:11
coroutine => enabled with thread context
debug => enabled
trace_log => enabled
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
sockets => enabled
openssl => OpenSSL 3.0.2 15 Mar 2022
dtls => enabled
http2 => enabled
json => enabled
curl-native => enabled
pcre => enabled
c-ares => 1.18.1
zlib => 1.2.11
brotli => E16777225/D16777225
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
mysqlnd => enabled
async_redis => enabled
coroutine_pgsql => enabled
Directive => Local Value => Master Value
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_fiber_mock => Off => Off
swoole.enable_preemptive_scheduler => On => On
swoole.display_errors => On => On
swoole.use_shortname => On => On
swoole.unixsock_buffer_size => 8388608 => 8388608

What is your machine environment used (show your uname -a & php -v & gcc -v) ?

• PHP 8.3.12 (cli) (built: Sep 27 2024 03:53:05) (NTS)
• gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1 22.04)
• Linux directlv16-ThinkPad-E15-Gen-4 6.8.0-45-generic 45~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Sep 11 15:25:05 UTC 2 x86_64 x86_64 x86_64 GNU/Linux