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/**
 * @file llpacketack.h
 * @brief Reliable UDP helpers for the message system.
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLPACKETACK_H
#define LL_LLPACKETACK_H

#include "llhost.h"
#include "llunits.h"

class LLReliablePacketParams
{
public:
    LLHost mHost;
    S32 mRetries;
    BOOL mPingBasedRetry;
    F32Seconds mTimeout;
    void (*mCallback)(void **,S32);
    void** mCallbackData;
    char* mMessageName;

public:
    LLReliablePacketParams()
    {
        clear();
    };

    ~LLReliablePacketParams() { };

    void clear()
    {
        mHost.invalidate();
        mRetries = 0;
        mPingBasedRetry = TRUE;
        mTimeout = F32Seconds(0.f);
        mCallback = NULL;
        mCallbackData = NULL;
        mMessageName = NULL;
    };

    void set(
        const LLHost& host,
        S32 retries,
        BOOL ping_based_retry,
        F32Seconds timeout,
        void (*callback)(void**,S32),
        void** callback_data, char* name)
    {
        mHost = host;
        mRetries = retries;
        mPingBasedRetry = ping_based_retry;
        mTimeout = timeout;
        mCallback = callback;
        mCallbackData = callback_data;
        mMessageName = name;
    };
};

class LLReliablePacket
{
public:
    LLReliablePacket(
        S32 socket,
        U8* buf_ptr,
        S32 buf_len,
        LLReliablePacketParams* params);
    ~LLReliablePacket()
    {
        mCallback = NULL;
        delete [] mBuffer;
        mBuffer = NULL;
    };

    friend class LLCircuitData;
protected:
    S32 mSocket;
    LLHost mHost;
    S32 mRetries;
    BOOL mPingBasedRetry;
    F32Seconds mTimeout;
    void (*mCallback)(void**,S32);
    void** mCallbackData;
    char* mMessageName;

    U8* mBuffer;
    S32 mBufferLength;

    TPACKETID mPacketID;

    F64Seconds mExpirationTime;
};

#endif