Intercept.h

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/*
 * Copyright (C) 1996-2019 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */

/* DEBUG: section 89    NAT / IP Interception */

#ifndef SQUID_IP_IPINTERCEPT_H
#define SQUID_IP_IPINTERCEPT_H

/* for time_t */
#include "SquidTime.h"

namespace Ip
{

class Address;

class Intercept
{
public:
    Intercept() : transparentActive_(0), interceptActive_(0), lastReported_(0) {};
    ~Intercept() {};

    bool Lookup(const Comm::ConnectionPointer &newConn, const Comm::ConnectionPointer &listenConn);

    bool ProbeForTproxy(Address &test);

    inline int TransparentActive() { return transparentActive_; };

    inline void StartTransparency() { transparentActive_=1; };

    void StopTransparency(const char *str);

    inline int InterceptActive() { return interceptActive_; };

    inline void StartInterception() { interceptActive_=1; };

    inline void StopInterception(const char *str);

private:

    bool TproxyTransparent(const Comm::ConnectionPointer &newConn, int silent);

    bool NetfilterInterception(const Comm::ConnectionPointer &newConn, int silent);

    bool IpfwInterception(const Comm::ConnectionPointer &newConn, int silent);

    bool IpfInterception(const Comm::ConnectionPointer &newConn, int silent);

    bool PfInterception(const Comm::ConnectionPointer &newConn, int silent);

    int transparentActive_;
    int interceptActive_;
    time_t lastReported_; 
};

#if LINUX_NETFILTER && !defined(IP_TRANSPARENT)
#define IP_TRANSPARENT 19
#endif

extern Intercept Interceptor;

} // namespace Ip

#endif /* SQUID_IP_IPINTERCEPT_H */