pbr: does not enable routing at startup

[mikhirev]

Maintainer: @stangri
Environment: ath79/nand/netgear_wndr3700-v4 OpenWrt 24.10.0-rc4 (r28211-d55754ce0d)

Description:

After reboot routing to the wireguard interface does not work correctly. I found the following line in system log:

Thu Dec 26 03:04:18 2024 user.notice pbr [2621]: Setting up routing for 'wireguard/0.0.0.0' [✗]

After I restart pbr, everything works fine. In the log I see:

Thu Dec 26 03:07:53 2024 user.notice pbr [9955]: Setting up routing for 'wireguard/10.11.0.2' [✓]

But after reboot the problem reproduces. Seems that pbr starts too early, before the wireguard interface is set up.

[mikhirev]

Well, my assumption that pbr should wait for interfaces was incorrect. It seems that interface triggers don't work as expected. I see the following trigger registered:

                        [
                                "interface.*",
                                [
                                        "if",
                                        [
                                                "eq",
                                                "interface",
                                                "wireguard"
                                        ],
                                        [
                                                "run_script",
                                                "/etc/init.d/pbr",
                                                "on_interface_reload",
                                                "wireguard"
                                        ]
                                ]
                        ]

However it does not work properly at startup.

[mikhirev]

If I run /etc/init.d/pbr on_interface_reload wireguard in command line, it is reloaded successfully. So my guess is that the trigger does not take action because the wireguard interface gets up while pbr is starting (it takes more than 30 secs and there is a line firewall: Reloading firewall due to ifup of wireguard (wireguard) between messages about setting up routing from pbr in log).

[mikhirev]

As I see, when starting with on_boot, pbr waits for the default gateway interface but does not wait for other interfaces.

[mikhirev]

As a workaroud, I did

uci set pbr.@pbr[0].procd_boot_delay=30
uci commit

However everything should work out-of-the-box.