WorldSocket.cpp File Reference

#include "WorldSocket.h"
#include "AccountMgr.h"
#include "Config.h"
#include "CryptoHash.h"
#include "CryptoRandom.h"
#include "DatabaseEnv.h"
#include "GameTime.h"
#include "IPLocation.h"
#include "Opcodes.h"
#include "PacketLog.h"
#include "Random.h"
#include "Realm.h"
#include "ScriptMgr.h"
#include "World.h"
#include "WorldSession.h"
#include "zlib.h"
#include <memory>
#include "ServerPktHeader.h"

Go to the source code of this file.

Classes
struct	AuthSession
struct	AccountInfo

Functions
void	compressBuff (void *dst, uint32 *dst_size, void *src, int src_size)

Function Documentation

compressBuff()

void compressBuff	(	void *	dst,
		uint32 *	dst_size,
		void *	src,
		int	src_size
	)

{
    z_stream c_stream;
 
    c_stream.zalloc = (alloc_func)0;
    c_stream.zfree = (free_func)0;
    c_stream.opaque = (voidpf)0;
 
    // default Z_BEST_SPEED (1)
    int z_res = deflateInit(&c_stream, sWorld->getIntConfig(CONFIG_COMPRESSION));
    if (z_res != Z_OK)
    {
        LOG_ERROR("entities.object", "Can't compress update packet (zlib: deflateInit) Error code: {} ({})", z_res, zError(z_res));
        *dst_size = 0;
        return;
    }
 
    c_stream.next_out = (Bytef*)dst;
    c_stream.avail_out = *dst_size;
    c_stream.next_in = (Bytef*)src;
    c_stream.avail_in = (uInt)src_size;
 
    z_res = deflate(&c_stream, Z_NO_FLUSH);
    if (z_res != Z_OK)
    {
        LOG_ERROR("entities.object", "Can't compress update packet (zlib: deflate) Error code: {} ({})", z_res, zError(z_res));
        *dst_size = 0;
        return;
    }
 
    if (c_stream.avail_in != 0)
    {
        LOG_ERROR("entities.object", "Can't compress update packet (zlib: deflate not greedy)");
        *dst_size = 0;
        return;
    }
 
    z_res = deflate(&c_stream, Z_FINISH);
    if (z_res != Z_STREAM_END)
    {
        LOG_ERROR("entities.object", "Can't compress update packet (zlib: deflate should report Z_STREAM_END instead {} ({})", z_res, zError(z_res));
        *dst_size = 0;
        return;
    }
 
    z_res = deflateEnd(&c_stream);
    if (z_res != Z_OK)
    {
        LOG_ERROR("entities.object", "Can't compress update packet (zlib: deflateEnd) Error code: {} ({})", z_res, zError(z_res));
        *dst_size = 0;
        return;
    }
 
    *dst_size = c_stream.total_out;
}

References CONFIG_COMPRESSION, LOG_ERROR, and sWorld.

Referenced by EncryptableAndCompressiblePacket::CompressIfNeeded().