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fix: dns rewrites and flush

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This commit is contained in:
NickVs2015
2026-04-12 10:39:59 +03:00
parent a78f42a199
commit dcb097b0b2
3 changed files with 55 additions and 8 deletions
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client/platforms/linux/daemon/dnsutilslinux.cpp
+42 -2
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@@ -7,9 +7,11 @@
#include <net/if.h>
#include <QDBusVariant>
#include <QNetworkInterface>
#include <QTimer>
#include <QtDBus/QtDBus>
#include "core/networkUtilities.h"
#include "leakdetector.h"
#include "logger.h"
@@ -64,6 +66,15 @@ DnsUtilsLinux::~DnsUtilsLinux() {
MZ_COUNT_DTOR(DnsUtilsLinux);
if (m_resolver) {
for (auto iterator = m_linkDefaultRoutes.constBegin();
iterator != m_linkDefaultRoutes.constEnd(); ++iterator) {
QList<QVariant> argumentList;
argumentList << QVariant::fromValue(iterator.key());
argumentList << QVariant::fromValue(iterator.value());
m_resolver->asyncCallWithArgumentList(QStringLiteral("SetLinkDefaultRoute"),
argumentList);
}
for (auto iterator = m_linkDomains.constBegin();
iterator != m_linkDomains.constEnd(); ++iterator) {
QList<QVariant> argumentList;
@@ -82,6 +93,12 @@ DnsUtilsLinux::~DnsUtilsLinux() {
bool DnsUtilsLinux::updateResolvers(const QString& ifname,
const QList<QHostAddress>& resolvers) {
for (auto iterator = m_linkDefaultRoutes.constBegin();
iterator != m_linkDefaultRoutes.constEnd(); ++iterator) {
setLinkDefaultRoute(iterator.key(), iterator.value());
}
m_linkDefaultRoutes.clear();
m_ifindex = if_nametoindex(qPrintable(ifname));
if (m_ifindex <= 0) {
logger.error() << "Unable to resolve ifindex for" << ifname;
@@ -96,9 +113,9 @@ bool DnsUtilsLinux::updateResolvers(const QString& ifname,
return true;
}
updateLinkDefaultRoutes();
setLinkDNS(m_ifindex, resolvers);
setLinkDefaultRoute(m_ifindex, true);
setLinkDomains(m_ifindex, {DnsLinkDomain(".", true)});
updateLinkDomains();
return true;
}
@@ -107,6 +124,12 @@ bool DnsUtilsLinux::restoreResolvers() {
m_pendingIfname.clear();
m_pendingResolvers.clear();
for (auto iterator = m_linkDefaultRoutes.constBegin();
iterator != m_linkDefaultRoutes.constEnd(); ++iterator) {
setLinkDefaultRoute(iterator.key(), iterator.value());
}
m_linkDefaultRoutes.clear();
for (auto iterator = m_linkDomains.constBegin();
iterator != m_linkDomains.constEnd(); ++iterator) {
setLinkDomains(iterator.key(), iterator.value());
@@ -132,7 +155,7 @@ bool DnsUtilsLinux::restoreResolvers() {
void DnsUtilsLinux::dnsCallCompleted(QDBusPendingCallWatcher* call) {
QDBusPendingReply<> reply = *call;
if (reply.isError()) {
logger.debug() << "DBus call failed (may be transient after systemd-resolved restart)";
logger.error() << "Error received from the DBus service";
}
delete call;
}
@@ -200,6 +223,23 @@ void DnsUtilsLinux::setLinkDefaultRoute(int ifindex, bool enable) {
SLOT(dnsCallCompleted(QDBusPendingCallWatcher*)));
}
void DnsUtilsLinux::updateLinkDefaultRoutes() {
const QNetworkInterface defaultIface = NetworkUtilities::getGatewayAndIface().second;
const int ifindex = defaultIface.index();
if (ifindex <= 0) {
logger.warning() << "Unable to determine default route interface";
return;
}
if ((ifindex == m_ifindex) || m_linkDefaultRoutes.contains(ifindex)) {
return;
}
// Gateway link normally has DefaultRoute=yes. Keep behavior simple:
// disable it while VPN DNS is active and restore to yes on teardown.
m_linkDefaultRoutes[ifindex] = true;
setLinkDefaultRoute(ifindex, false);
}
void DnsUtilsLinux::updateLinkDomains() {
if (!m_resolver) return;
/* Get the list of search domains, and remove any others that might conspire