77 lines
3.8 KiB
C++
77 lines
3.8 KiB
C++
#ifndef LINUXFIREWALL_H
|
|
#define LINUXFIREWALL_H
|
|
|
|
|
|
#include <QString>
|
|
#include <QStringList>
|
|
|
|
// Descriptor for a set of firewall rules to be appled.
|
|
//
|
|
struct FirewallParams
|
|
{
|
|
QStringList dnsServers;
|
|
// QSharedPointer<NetworkAdapter> adapter;
|
|
QVector<QString> excludeApps; // Apps to exclude if VPN exemptions are enabled
|
|
QStringList allowAddrs;
|
|
QStringList blockAddrs;
|
|
// The follow flags indicate which general rulesets are needed. Note that
|
|
// this is after some sanity filtering, i.e. an allow rule may be listed
|
|
// as not needed if there were no block rules preceding it. The rulesets
|
|
// should be thought of as in last-match order.
|
|
|
|
bool blockAll; // Block all traffic by default
|
|
bool allowVPN; // Exempt traffic through VPN tunnel
|
|
bool allowDHCP; // Exempt DHCP traffic
|
|
bool blockIPv6; // Block all IPv6 traffic
|
|
bool allowLAN; // Exempt LAN traffic, including IPv6 LAN traffic
|
|
bool blockDNS; // Block all DNS traffic except specified DNS servers
|
|
bool allowPIA; // Exempt PIA executables
|
|
bool allowLoopback; // Exempt loopback traffic
|
|
bool allowHnsd; // Exempt Handshake DNS traffic
|
|
bool allowVpnExemptions; // Exempt specified traffic from the tunnel (route it over the physical uplink instead)
|
|
bool allowNets;
|
|
bool blockNets;
|
|
};
|
|
|
|
class LinuxFirewall
|
|
{
|
|
public:
|
|
enum IPVersion { IPv4, IPv6, Both };
|
|
// Table names
|
|
static QString kFilterTable, kNatTable, kMangleTable, kRtableName, kRawTable;
|
|
public:
|
|
using FilterCallbackFunc = std::function<void()>;
|
|
private:
|
|
static int createChain(IPVersion ip, const QString& chain, const QString& tableName = kFilterTable);
|
|
static int deleteChain(IPVersion ip, const QString& chain, const QString& tableName = kFilterTable);
|
|
static int linkChain(IPVersion ip, const QString& chain, const QString& parent, bool mustBeFirst = false, const QString& tableName = kFilterTable);
|
|
static int unlinkChain(IPVersion ip, const QString& chain, const QString& parent, const QString& tableName = kFilterTable);
|
|
static void installAnchor(IPVersion ip, const QString& anchor, const QStringList& rules, const QString& tableName = kFilterTable, const FilterCallbackFunc& enableFunc = {}, const FilterCallbackFunc& disableFunc = {});
|
|
static void uninstallAnchor(IPVersion ip, const QString& anchor, const QString& tableName = kFilterTable);
|
|
static QStringList getDNSRules(const QStringList& servers);
|
|
static QStringList getAllowRule(const QStringList& servers);
|
|
static QStringList getBlockRule(const QStringList& servers);
|
|
static void setupTrafficSplitting();
|
|
static void teardownTrafficSplitting();
|
|
static int execute(const QString& command, bool ignoreErrors = false);
|
|
private:
|
|
// Chain names
|
|
static QString kOutputChain, kRootChain, kPostRoutingChain, kPreRoutingChain;
|
|
|
|
public:
|
|
static void install();
|
|
static void uninstall();
|
|
static bool isInstalled();
|
|
static void ensureRootAnchorPriority(IPVersion ip = Both);
|
|
static void enableAnchor(IPVersion ip, const QString& anchor, const QString& tableName = kFilterTable);
|
|
static void disableAnchor(IPVersion ip, const QString& anchor, const QString& tableName = kFilterTable);
|
|
static bool isAnchorEnabled(IPVersion ip, const QString& anchor, const QString& tableName = kFilterTable);
|
|
static void setAnchorEnabled(IPVersion ip, const QString& anchor, bool enabled, const QString& tableName = kFilterTable);
|
|
static void replaceAnchor(LinuxFirewall::IPVersion ip, const QString &anchor, const QString &newRule, const QString& tableName);
|
|
static void updateDNSServers(const QStringList& servers);
|
|
static void updateAllowNets(const QStringList& servers);
|
|
static void updateBlockNets(const QStringList& servers);
|
|
};
|
|
|
|
|
|
#endif // LINUXFIREWALL_H
|