euler安装postgres

关于LSP是什么我就不多说了，假定大家都知道，不知道的可以去Google问问。
      LSP其实还是很有用的，不过最近看到许多人在学习过程中老遇到一些问题，下面就把我的一些经验说出来，纯属个人理解，有错勿怪。

1，安装LSP后系统逐渐卡死？      额，我当时学习的时候曾经遇到过这个问题，没仔细研究是什么原因，最近解决的方法是禁止Explorer.exe进程加载。

2，安装LSP后上不了网？
      写完DLL后忘记导出一些函数了吧？其中WSPStartup是必须要导出的，通常情况下这个函数的写法也是固定的。由于blogbus的日志限制字数，我发了几次都被截断了，所以就把这个代码省略了，大家去网上找吧。

3，LSP怎么安装？
      很多人都是通过王艳平《Windows网络与通信程序设计》一书学习的，不过那本书的安装代码有问题，在XP上没法用。下面我发出自己的安装/卸载代码。

 

#include <ws2spi.h>
#include <sporder.h>
#include <windows.h>
#include <stdio.h>

#pragma comment(lib,"ws2_32.lib")
#pragma comment(lib,"rpcrt4.lib")
#pragma comment(lib,"sporder.lib")

//
// 要安装的LSP的硬编码，在移除的时候还要使用它
//
GUID  ProviderGuid = { 0x9d6c9dd7 , 0xa201 , 0x42f5 ,{ 0xa8 , 0xbc , 0x03 , 0xf0 , 0x1f , 0x41 , 0x72 , 0xc6 }};

//
// 枚举协议链
//
LPWSAPROTOCOL_INFOW GetProvider( LPINT lpnTotalProtocols)
{
    DWORD dwSize = 0;
    int nError;
    LPWSAPROTOCOL_INFOW pProtoInfo = NULL;
   
    // 取得需要的缓冲区大小
    if( :: WSCEnumProtocols( NULL , pProtoInfo , & dwSize , & nError) == SOCKET_ERROR)
    {
        if( nError != WSAENOBUFS)
            return NULL;
    }
   
    // 分配缓冲区
    pProtoInfo = ( LPWSAPROTOCOL_INFOW) :: GlobalAlloc( GPTR , dwSize);

    * lpnTotalProtocols = :: WSCEnumProtocols( NULL , pProtoInfo , & dwSize , & nError);
    return pProtoInfo;
}

//
// 释放缓冲区
//
void FreeProvider( LPWSAPROTOCOL_INFOW pProtoInfo)
{
    :: GlobalFree( pProtoInfo);
}

//
// 安装LSP
//
BOOL InstallProvider( char * pszPathName)
{
    WCHAR wszLSPName [] = L"CuitWlgcxLSP";
    LPWSAPROTOCOL_INFOW pProtoInfo;
    WSAPROTOCOL_INFOW    OriginalProtocolInfo [ 3 ];
    DWORD                dwOrigCatalogId [ 3 ];
    DWORD                dwLayeredCatalogId;        // 我们的分层协议目录ID
    int        nProtocols;   
    int        nArrayCount = 0;
    int        nError;
    WCHAR    wszPathName [ 256 ];

    memset( wszPathName , 0 , sizeof( wszPathName));
    if( !:: MultiByteToWideChar( CP_ACP , 0 , pszPathName , - 1 , wszPathName , 256))
    {
        printf( "MultiByteToWideChar Failed!(%d) /n " , :: GetLastError());
        return FALSE;
    }
    // --输出LSP DLL路径
    printf( "LSP PathName: %s /n " , pszPathName);
   
    // 找到我们的下层协议，将信息放入数组中
    pProtoInfo      = GetProvider( & nProtocols);
    BOOL bFindUdp = FALSE;
    BOOL bFindTcp = FALSE;
    BOOL bFindRaw = FALSE;
    for( int i = 0; i < nProtocols; i ++)
    {
        if( pProtoInfo [ i ]. iAddressFamily == AF_INET)
        {
            if( ! bFindTcp && pProtoInfo [ i ]. iProtocol == IPPROTO_TCP)
            {
                memcpy( & OriginalProtocolInfo [ nArrayCount ], & pProtoInfo [ i ], sizeof( WSAPROTOCOL_INFOW));
                // 去掉XP1_IFS_HANDLES标志
                OriginalProtocolInfo [ nArrayCount ]. dwServiceFlags1 = OriginalProtocolInfo [ nArrayCount ]. dwServiceFlags1 & ( ~ XP1_IFS_HANDLES);
                // 保存原来的入口ID
                dwOrigCatalogId [ nArrayCount ++ ] = pProtoInfo [ i ]. dwCatalogEntryId;
               
                bFindTcp = TRUE;
            }
            if( ! bFindUdp && pProtoInfo [ i ]. iProtocol == IPPROTO_UDP)
            {
                memcpy( & OriginalProtocolInfo [ nArrayCount ], & pProtoInfo [ i ], sizeof( WSAPROTOCOL_INFOW));
                OriginalProtocolInfo [ nArrayCount ]. dwServiceFlags1 = OriginalProtocolInfo [ nArrayCount ]. dwServiceFlags1 & ( ~ XP1_IFS_HANDLES);
               
                dwOrigCatalogId [ nArrayCount ++ ] = pProtoInfo [ i ]. dwCatalogEntryId;
                bFindUdp = TRUE;
            }
            if( ! bFindRaw && pProtoInfo [ i ]. iProtocol == IPPROTO_IP)
            {
                memcpy( & OriginalProtocolInfo [ nArrayCount ], & pProtoInfo [ i ], sizeof( WSAPROTOCOL_INFOW));
                OriginalProtocolInfo [ nArrayCount ]. dwServiceFlags1 = OriginalProtocolInfo [ nArrayCount ]. dwServiceFlags1 & ( ~ XP1_IFS_HANDLES);
               
                dwOrigCatalogId [ nArrayCount ++ ] = pProtoInfo [ i ]. dwCatalogEntryId;
                bFindRaw = TRUE;
            }
        }
    } 
   
    // 安装我们的分层协议，获取一个dwLayeredCatalogId
    // 随便找一个下层协议的结构复制过来即可
    WSAPROTOCOL_INFOW LayeredProtocolInfo;
    memcpy( & LayeredProtocolInfo , & OriginalProtocolInfo [ 0 ], sizeof( WSAPROTOCOL_INFOW));
    // 修改协议名称，类型，设置PFL_HIDDEN标志
    wcscpy( LayeredProtocolInfo . szProtocol , wszLSPName);
    LayeredProtocolInfo . ProtocolChain . ChainLen = LAYERED_PROTOCOL;
    LayeredProtocolInfo . dwProviderFlags          |= PFL_HIDDEN;
    // 正式安装
    if( :: WSCInstallProvider( & ProviderGuid , wszPathName , & LayeredProtocolInfo , 1 , & nError) == SOCKET_ERROR)
    {
        return FALSE;
    }
    // 重新枚举协议，获取分层协议的目录ID号
    FreeProvider( pProtoInfo);
    pProtoInfo = GetProvider( & nProtocols);
    for( i = 0; i < nProtocols; i ++)
    {
        if( memcmp( & pProtoInfo [ i ]. ProviderId , & ProviderGuid , sizeof( ProviderGuid)) == 0)
        {
            dwLayeredCatalogId = pProtoInfo [ i ]. dwCatalogEntryId;
            break;
        }
    }
   
    // 安装协议链
    // 修改协议名称，类型
    WCHAR wszChainName [ WSAPROTOCOL_LEN + 1 ];
    for( i = 0; i < nArrayCount; i ++)
    {
        swprintf( wszChainName , L"%ws over %ws" , wszLSPName , OriginalProtocolInfo [ i ]. szProtocol);
        wcscpy( OriginalProtocolInfo [ i ]. szProtocol , wszChainName);
        if( OriginalProtocolInfo [ i ]. ProtocolChain . ChainLen == 1)
        {
            OriginalProtocolInfo [ i ]. ProtocolChain . ChainEntries [ 1 ] = dwOrigCatalogId [ i ];
        }
        else
        {
            for( int j = OriginalProtocolInfo [ i ]. ProtocolChain . ChainLen; j > 0; j --)
            {
                OriginalProtocolInfo [ i ]. ProtocolChain . ChainEntries [ j ] = OriginalProtocolInfo [ i ]. ProtocolChain . ChainEntries [ j - 1 ];
            }
        }
        OriginalProtocolInfo [ i ]. ProtocolChain . ChainLen ++;
        OriginalProtocolInfo [ i ]. ProtocolChain . ChainEntries [ 0 ] = dwLayeredCatalogId;   
    }
    // 获取一个Guid，安装之
    GUID ProviderChainGuid;
    if( :: UuidCreate( & ProviderChainGuid) == RPC_S_OK)
    {
        if( :: WSCInstallProvider( & ProviderChainGuid , wszPathName , OriginalProtocolInfo , nArrayCount , & nError) == SOCKET_ERROR)
        {
            return FALSE;   
        }
    }
    else
        return FALSE;
   
    // 重新排序Winsock目录，将我们的协议链提前
    // 重新枚举安装的协议
    FreeProvider( pProtoInfo);
    pProtoInfo = GetProvider( & nProtocols);
   
    DWORD dwIds [ 20 ];
    int nIndex = 0;
    // 添加我们的协议链
    for( i = 0; i < nProtocols; i ++)
    {
        if(( pProtoInfo [ i ]. ProtocolChain . ChainLen > 1) && ( pProtoInfo [ i ]. ProtocolChain . ChainEntries [ 0 ] == dwLayeredCatalogId))
        {
            dwIds [ nIndex ++ ] = pProtoInfo [ i ]. dwCatalogEntryId;
        }
    }
    // 添加其它协议
    for( i = 0; i < nProtocols; i ++)
    {
        if(( pProtoInfo [ i ]. ProtocolChain . ChainLen <= 1) || ( pProtoInfo [ i ]. ProtocolChain . ChainEntries [ 0 ] != dwLayeredCatalogId))
        {
            dwIds [ nIndex ++ ] = pProtoInfo [ i ]. dwCatalogEntryId;
        }
    }
    // 重新排序Winsock目录
    if(( nError = :: WSCWriteProviderOrder( dwIds , nIndex)) != ERROR_SUCCESS)
    {
        return FALSE;
    }
    FreeProvider( pProtoInfo);
   
    return TRUE;
}

//
// 卸载LSP
//
BOOL RemoveProvider()
{
    LPWSAPROTOCOL_INFOW pProtoInfo;
    int nProtocols;
    DWORD dwLayeredCatalogId;
   
    // 根据Guid取得分层协议的目录ID号
    pProtoInfo = GetProvider( & nProtocols);
    int nError;
    for( int i = 0; i < nProtocols; i ++)
    {
        if( memcmp( & ProviderGuid , & pProtoInfo [ i ]. ProviderId , sizeof( ProviderGuid)) == 0)
        {
            dwLayeredCatalogId = pProtoInfo [ i ]. dwCatalogEntryId;
            break;
        }
    }
   
    if( i < nProtocols)
    {
        // 移除协议链
        for( i = 0; i < nProtocols; i ++)
        {
            if(( pProtoInfo [ i ]. ProtocolChain . ChainLen > 1) && ( pProtoInfo [ i ]. ProtocolChain . ChainEntries [ 0 ] == dwLayeredCatalogId))
            {
                :: WSCDeinstallProvider( & pProtoInfo [ i ]. ProviderId , & nError);
            }
        }
        // 移除分层协议
        :: WSCDeinstallProvider( & ProviderGuid , & nError);
    }
   
    return TRUE;
}

void main( int argc , char * argv [])
{
    char szFileName [ 256 ];
    char szPathName [ 256 ];
    char * p;

    if( argc == 3)
    {
        strcpy( szFileName , argv [ 2 ]);
        if( strcmp( argv [ 1 ], "-install") == 0)  
        {
           

            if( :: GetFullPathName( szFileName , 256 , szPathName , &p) != 0)
            {
                if( InstallProvider( szPathName))
                {
                    printf( " /n Install Successully! /n ");
                    return;
                }
            }
           
            if( :: GetFileAttributes( szPathName) == - 1)
            {
                printf( "Error:Can't Find File! /n ");
                return;
            }
           
            printf( " /n Install Failed -> %d /n " , :: GetLastError());
            return;
        }
        else if( strcmp( argv [ 1 ], "-remove") == 0) 
        {
            if( RemoveProvider())
                printf( " /n Remove Successully! /n ");
            else
                printf( " /n Remove Failed -> %d /n " , :: GetLastError());
            return;
        }
    }
}