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