CWE-ou-minkata/Sources/Plasma/Apps/plUruLauncher/SelfPatcher.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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*==LICENSE==*/
/*****************************************************************************
*
*   $/Plasma20/Sources/Plasma/Apps/plUruLauncher/SelfPatcher.cpp
*   
***/

#include "Pch.h"
#pragma hdrstop


/*****************************************************************************
*
*   Private Data
*
***/

#ifndef PLASMA_EXTERNAL_RELEASE
    static const wchar_t s_manifest[] = L"InternalPatcher";
#else
    static const wchar_t s_manifest[] = L"ExternalPatcher";
#endif

class SelfPatcherStream : public plZlibStream {
    public:
        virtual uint32_t  Write(uint32_t byteCount, const void* buffer);
        static plLauncherInfo *info;
        static unsigned totalBytes;
        static unsigned progress;
};

unsigned SelfPatcherStream::totalBytes = 0;
unsigned SelfPatcherStream::progress = 0;

static bool         s_downloadComplete;
static long         s_numFiles;
static ENetError    s_patchResult;
static bool         s_updated;
static wchar_t        s_newPatcherFile[MAX_PATH];


/*****************************************************************************
*
*   Private Functions
*
***/

//============================================================================
static void NetErrorHandler (ENetProtocol protocol, ENetError error) {
    plString msg = plString::Format("NetErr: %S", NetErrorToString(error));
    plStatusLog::AddLineS("patcher.log", msg.cstr());

    if (IS_NET_SUCCESS(s_patchResult))
        s_patchResult = error;
    s_downloadComplete = true;

    switch(error) {
        case kNetErrServerBusy:
            MessageBox(0, "Due to the high demand, the server is currently busy. Please try again later, or for alternative download options visit: http://www.mystonline.com/play/", "UruLauncher", MB_OK);
            s_patchResult = kNetErrServerBusy;
            s_downloadComplete = true;
        break;
    }
}

//============================================================================
static void DownloadCallback (
    ENetError       result,
    void *          param,
    const wchar_t     filename[],
    hsStream *      writer
) {
    if(IS_NET_ERROR(result)) {
        switch (result) {
            case kNetErrTimeout:
                writer->Rewind();
                NetCliFileDownloadRequest(filename, writer, DownloadCallback, param);
            break;
            
            default:
                plString msg = plString::Format("Error getting patcher file: %S", NetErrorToString(result));
                plStatusLog::AddLineS("patcher.log", msg.cstr());

                if (IS_NET_SUCCESS(s_patchResult))
                    s_patchResult = result;
            break;
        }
        return;
    }

    writer->Close();
    delete writer;
    AtomicAdd(&s_numFiles, -1);

    if(!s_numFiles) {
        s_downloadComplete = true;
        s_updated = true;
    }
}

//============================================================================
static bool MD5Check (const char filename[], const wchar_t md5[]) {
    // Do md5 check
    char md5copy[MAX_PATH];
    plMD5Checksum existingMD5(filename);
    plMD5Checksum latestMD5;

    StrToAnsi(md5copy, md5, arrsize(md5copy));
    latestMD5.SetFromHexString(md5copy);
    return (existingMD5 == latestMD5);
}

//============================================================================
static void ManifestCallback (
    ENetError                       result,
    void *                          param,
    const wchar_t                     group[],
    const NetCliFileManifestEntry   manifest[],
    unsigned                        entryCount
) {
    if(IS_NET_ERROR(result)) {
        switch (result) {
            case kNetErrTimeout:
                NetCliFileManifestRequest(ManifestCallback, nil, s_manifest);
            break;
            
            default:
                plString msg = plString::Format("Error getting patcher manifest: %S", NetErrorToString(result));
                plStatusLog::AddLineS("patcher.log", msg.cstr());

                if (IS_NET_SUCCESS(s_patchResult))
                    s_patchResult = result;
            break;
        }
        return;
    }

#ifndef PLASMA_EXTERNAL_RELEASE
    if (entryCount == 0)  { // dataserver does not contain a patcher
        s_downloadComplete = true;
        return;
    }
#endif

    char ansi[MAX_PATH];

    // MD5 check current patcher against value in manifest
    ASSERT(entryCount == 1);
    wchar_t curPatcherFile[MAX_PATH];
    PathGetProgramName(curPatcherFile, arrsize(curPatcherFile));
    StrToAnsi(ansi, curPatcherFile, arrsize(ansi));
    if (!MD5Check(ansi, manifest[0].md5)) {
//      MessageBox(GetTopWindow(nil), "MD5 failed", "Msg", MB_OK);
        SelfPatcherStream::totalBytes += manifest[0].zipSize;

        AtomicAdd(&s_numFiles, 1);
        SetText("Downloading new patcher...");

        StrToAnsi(ansi, s_newPatcherFile, arrsize(ansi));
        SelfPatcherStream * stream = NEWZERO(SelfPatcherStream);
        if (!stream->Open(ansi, "wb"))
            ErrorAssert(__LINE__, __FILE__, "Failed to create file: %s, errno: %u", ansi, errno);

        NetCliFileDownloadRequest(manifest[0].downloadName, stream, DownloadCallback, nil);
    }
    else {
        s_downloadComplete = true;
    }
}

//============================================================================
static void FileSrvIpAddressCallback (
    ENetError       result,
    void *          param,
    const wchar_t     addr[]
) {
    NetCliGateKeeperDisconnect();

    if (IS_NET_ERROR(result)) {
        plString msg = plString::Format("FileSrvIpAddressRequest failed: %S", NetErrorToString(result));
        plStatusLog::AddLineS("patcher.log", msg.cstr());

        s_patchResult = result;
        s_downloadComplete = true;
    }
    
    // Start connecting to the server
    NetCliFileStartConnect(&addr, 1, true);

    PathGetProgramDirectory(s_newPatcherFile, arrsize(s_newPatcherFile));
    GetTempFileNameW(s_newPatcherFile, kPatcherExeFilename, 0, s_newPatcherFile);
    PathDeleteFile(s_newPatcherFile);

    NetCliFileManifestRequest(ManifestCallback, nil, s_manifest);
}

//============================================================================
static bool SelfPatcherProc (bool * abort, plLauncherInfo *info) {

    bool patched = false;
    s_downloadComplete = false;
    s_patchResult = kNetSuccess;

    NetClientInitialize();
    NetClientSetErrorHandler(NetErrorHandler);

    const wchar_t ** addrs;
    unsigned count;

    count = GetGateKeeperSrvHostnames(&addrs);

    // Start connecting to the server
    NetCliGateKeeperStartConnect(addrs, count);

    // request a file server ip address
    NetCliGateKeeperFileSrvIpAddressRequest(FileSrvIpAddressCallback, nil, true);

    while(!s_downloadComplete && !*abort) {
        NetClientUpdate();
        AsyncSleep(10);
    }   

    NetCliFileDisconnect();
    NetClientUpdate();

    // Shutdown the client/server networking subsystem
    NetClientDestroy();

    if (s_downloadComplete && !*abort && s_updated && IS_NET_SUCCESS(s_patchResult)) {

        // launch new patcher
        STARTUPINFOW        si;
        PROCESS_INFORMATION pi;
        memset(&si, 0, sizeof(si));
        memset(&pi, 0, sizeof(pi));
        si.cb = sizeof(si);

        wchar_t cmdline[MAX_PATH];
        StrPrintf(cmdline, arrsize(cmdline), L"%s %s", s_newPatcherFile, info->cmdLine);

        // we have only successfully patched if we actually launch the new version of the patcher
        patched = CreateProcessW(
            NULL,
            cmdline,
            NULL,
            NULL,
            FALSE, 
            DETACHED_PROCESS,
            NULL,
            NULL,
            &si,
            &pi
        );
        SetReturnCode(pi.dwProcessId);
        CloseHandle( pi.hThread );
        CloseHandle( pi.hProcess );
        ASSERT(patched);
    }

    return patched;
}


/*****************************************************************************
*
*   ProgressStream Functions
*
***/

//============================================================================
uint32_t SelfPatcherStream::Write(uint32_t byteCount, const void* buffer) {
    progress += byteCount;
    float p = (float)progress / (float)totalBytes * 100;        // progress
    SetProgress( (int)p );
    return plZlibStream::Write(byteCount, buffer);
}


/*****************************************************************************
*
*   Protected Functions
*
***/

//============================================================================
// if return value is true, there was an update and the patcher should be shutdown, so the new patcher can take over
bool SelfPatch (bool noSelfPatch, bool * abort, ENetError * result, plLauncherInfo *info) {
    bool patched = false;
    if (!noSelfPatch) {
        SetText("Checking for patcher update...");
        patched = SelfPatcherProc(abort, info);
    }
    *result = s_patchResult;
    return patched;
}