Tatsh / ifup-systemd-resolved / #4

LinkDnsIpList generateAddresses() {

    LinkDnsIpList dnsArgs;

    for (const auto &ipAddress : QStringList{

             QString(qEnvironmentVariable(Strings::EnvironmentVariableNames::dns1)).trimmed(),

             QString(qEnvironmentVariable(Strings::EnvironmentVariableNames::dns2)).trimmed()}) {

        if (!ipAddress.isEmpty()) {

            const QHostAddress addr(ipAddress);

            auto isIpv4 = false;

            const auto ipv4 = addr.toIPv4Address(&isIpv4);

            LinkDnsIp add;

            if (isIpv4) {

                for (auto shift = 24; shift >= 0; shift -= 8) {

                    add.ipAddress << ((ipv4 >> shift) & 0xFF);

                add.family = AF_INET6;

                const auto ipv6 = addr.toIPv6Address();

                for (auto i = 0; i < 16; i++) {

                    add.ipAddress << ipv6[i];

            dnsArgs << add;

    return dnsArgs;

}

LinkDomainList generateDomains() {

    LinkDomainList domainsArg;

    for (const auto &domain :

         QString(qEnvironmentVariable(Strings::EnvironmentVariableNames::dnsSuffix))

             .trimmed()

             .split(Strings::singleSpace, Qt::SkipEmptyParts)) {

        domainsArg << LinkDomain{domain, false};

    return domainsArg;

}