Error on ipv6 on make test

[Soufleuse]

Description

I send you the report of make test command. There is an error related to ipv6; maybe you can figure it out.

php_test_results_20250319_0037.txt

PHP Version

8.4.4

Operating System

Debian 12

[Soufleuse]

Just to say, I downloaded the tar file of php 8.4.4 source code, I've done the configure and make step from https://www.php.net/manual/fr/install.unix.debian.php. So I am at step 4 just after the make command, wondering if I do make install. There was no error on make, but I got the ipv6 error on make test.

[devnexen]

Hi @Soufleuse and thanks for your report. I have few questions :

• Are you running it in a container ?
• What is the cat /proc/net/if_inet6 (or ip -6 addr show eventually) output ?
• no ipv6 firewall rules ? e.g. sudo ip6tables -F

Thanks

[Soufleuse]

Hi,

I'm running in a virtual machine configured for development, and I have no Docker-like containers.

cat /proc/net/if_inet6 gives that :
fe800000000000000a0027fffe3e0463 02 40 20 80 enp0s3
00000000000000000000000000000001 01 80 10 80 lo

The result of sudo ip6tables -F is... no output to show.

Hoping it helps,

Steve "Soufleuse" Lemieux

[devnexen]

That might depend on which virtual machine technology you re using and above all your virtual machine's network settings might make this test fails.

[Soufleuse]

I'm using Virtual Box version 7.1.6.r167084 on a Ubuntu machine. The network is bridged; I don't know if there is any settings to look at, but I might say I haven't yet used IPv6; so that part might be bugged and I don't think it can cause problems, except if I want to switch to IPv6, which is not the case actually.

[devnexen]

Ok.. in theory bridged mode should work if the host itself supports ipv6 multicast.
Couple of things on top of my head to try out eventually.

• Did you try testing in the host and if yes is this test workable ?
• Checking your VM instance network setting Promiscuous Mode, try setting to Allow all if not already.
• In the guest, checking net.ipv6.conf.all.mc_forwarding sysctl value, enabling if disabled.

[Soufleuse]

I began to install PHP 8.4.4 on the virtual machine, I haven't tested on my host yet. I did not find any net.ipv6.conf.all.mc_forwarding in my config, but I saw net.ipv6.conf.all.forwarding=1 commented in /etc/sysctl.conf, so I guess I have a default value for that fowarding. When I'll save that command, I'll set the Promiscuous Mode to allow all.

[Soufleuse]

I changed the promiscuity mode and made make test again. I got the same message. Did I have to configure/do make again?

Also, I haven't yet tried to install php 8.4.5 on the host. I'm on that.

php_test_results_20250320_1821.txt

[Soufleuse]

On my host, here is the error.

php_test_results_20250320_1957.txt

[devnexen]

Ok maybe let's check some possible reasons for the host :

• see if lo appears there and its index cat /proc/net/if_inet6.
• if multicast is supported for this interface ip link show lo.
• Any firewall rules ? sudo ip6tables -L -n -v.

Depending on your response, we will see.

[Soufleuse]

I send you here the result of each command.

ip6tables.txt
linkshow.txt
testinet6.txt

[devnexen]

I see, it seems the firewall rules might be the cause. It might be possible to allow what is needed for the test for, respectively, inbound and outbound rules.

ip6tables -I INPUT -i lo -d ff00::/8 -j ACCEPT
ip6tables -I OUTPUT -o lo -d ff00::/8 -j ACCEPT

[Soufleuse]

Here is the result : I have yet an error - see the file below.

php_test_results_20250323_2231.txt

[devnexen]

Yes this test fails, but this one is expected to on occasion.
Wait, I misread

(warn: XFAIL section but test passes)

The test is expected to fail intermitently but it pass here.

[Soufleuse]

Ok... so I can go with what I compile by making make install?

[devnexen]

Yes, the original issue is fixed and was due to environmental settings; enjoy PHP :)

[Soufleuse]

Note : ip6tables works on Ubuntu but not on Debian 12, so I did my test on Ubuntu as it failed on both Ubuntu and Debian. So I have to find out the Debian equivalent for Debian for ip6table?

[devnexen]

If you really want to see the test passing, you likely need to figure out the blocker cause in your environment indeed.
You do not have to do always make test just for that particular case though, e.g. sapi/cli/php ./run-tests.php ext/sockets/tests/mcast_ipv6_recv.phpt.