Network module believes interface has no IP after IPv6 temporary address gets rotated

[omgold]

I'm using both IPv4 and IPv6. I find that the Network module says (no IP) and doesn't show the normal network info, like bandwidth anymore after the network stack switches the temporary IPv6 address (created because net.ipv6.conf.*.use_tempaddr = 2).

I believe the reason is a logic error in waybar::modules::Network::handleEvents().

Here the net is assumed to not have an address anymore after an address is deleted:

            if (!is_del_event) {
                ...
            } else {
              net->ipaddr_.clear();
              net->cidr_ = 0;
              net->netmask_.clear();
              spdlog::debug("network: {} addr deleted {}/{}", net->ifname_,
                            inet_ntop(ifa->ifa_family, RTA_DATA(ifa_rta), ipaddr, sizeof(ipaddr)),
                            ifa->ifa_prefixlen);
            }

As the rotation of the IPv6 seems to first add the new address, then remove the old one, the behavior described above results.

I'm using Waybar 0.12.0