Intercept.h

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/*
 * Copyright (C) 1996-2025 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_SRC_IP_INTERCEPT_H
#define SQUID_SRC_IP_INTERCEPT_H
 
#include "comm/forward.h"
 
namespace Ip
{
 
class Address;
 
class Intercept
{
public:
    Intercept() : transparentActive_(0), interceptActive_(0) {}
    ~Intercept() {};
 
    bool LookupNat(const Comm::Connection &);
 
    bool ProbeForTproxy(Address &test);
 
    inline int TransparentActive() { return transparentActive_; };
 
    void StartTransparency();
 
    void StopTransparency(const char *str);
 
    inline int InterceptActive() { return interceptActive_; };
 
    void StartInterception();
 
private:
 
    bool NetfilterInterception(const Comm::ConnectionPointer &newConn);
 
    bool IpfwInterception(const Comm::ConnectionPointer &newConn);
 
    bool IpfInterception(const Comm::ConnectionPointer &newConn);
 
    bool PfInterception(const Comm::ConnectionPointer &newConn);
 
    bool UseInterceptionAddressesLookedUpEarlier(const char *, const Comm::ConnectionPointer &);
 
    int transparentActive_;
    int interceptActive_;
};
 
#if LINUX_NETFILTER && !defined(IP_TRANSPARENT)
#define IP_TRANSPARENT 19
#endif
 
extern Intercept Interceptor;
 
} // namespace Ip
 
#endif /* SQUID_SRC_IP_INTERCEPT_H */