/*
 * $Id: ICMPPinger.h,v 1.1 2007/12/14 23:11:45 amosjeffries Exp $
 *
 * DEBUG: section 37    ICMP Routines
 * AUTHOR: Duane Wessels, Amos Jeffries
 *
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 */
#ifndef _INCLUDE_ICMPPINGER_H
#define _INCLUDE_ICMPPINGER_H

#include "config.h"
#include "Icmp.h"

/**
 * Implements the interface to squid for ICMP operations
 */
class IcmpPinger : public Icmp
{
public:
    IcmpPinger();
    virtual ~IcmpPinger();

    /// Start and initiate control channel to squid
    virtual int Open();

    /// Shutdown pinger helper and control channel
    virtual void Close();

#if USE_ICMP

    /// Send ICMP results back to squid.
    void SendResult(pingerReplyData &preply, int len);

    /// Handle ICMP requests from squid, passing to helpers.
    virtual void Recv(void);

private:
    // unused in IcmpPinger
    virtual void SendEcho(IPAddress &to, int opcode, const char *payload, int len) {};

    /**
     * Control channel(s) to squid.
     * May be STDIN/STDOUT pipes or an IP socket depending on the OS
     */
    int socket_from_squid;
    int socket_to_squid;
#endif /* USE_ICMP */
};

#if USE_ICMP

/// pinger helper contains one of these as a global object.
SQUIDCEXTERN IcmpPinger control;

#endif

#endif
