使用WNet遍历网络资源-优快云博客

本文链接：https://blog.youkuaiyun.com/ensungm/article/details/4449689

本文介绍了一个使用WNet API遍历网络资源的C++示例程序，该程序能够枚举并展示网络上的资源信息，并尝试通过IP地址进行资源遍历。

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1，遍历网络资源的源码和Output效果：

#include <stdio.h> #include <assert.h> #include <windows.h> #include <svrapi.h> #include <iostream.h> #include <Winnetwk.h> void NetErrorHandler(DWORD dwRet, char *cReason) { cout << cReason << " Error Code:" << dwRet << endl; } void DisplayStruct(NETRESOURCE *lpNr) { cout << "dwScope:"; switch(lpNr->dwScope) { case RESOURCE_CONNECTED: cout << "RESOURCE_CONNECTED" << endl; break; case RESOURCE_GLOBALNET: cout << "RESOURCE_GLOBALNET" << endl; break; case RESOURCE_REMEMBERED: cout << "RESOURCE_REMEMBERED" << endl; break; default: cout << lpNr->dwScope << endl; } cout << "dwType:"; switch(lpNr->dwType) { case RESOURCETYPE_ANY: cout << "RESOURCETYPE_ANY" << endl; break; case RESOURCETYPE_DISK: cout << "RESOURCETYPE_DISK" << endl; break; case RESOURCETYPE_PRINT: cout << "RESOURCETYPE_PRINT" << endl; break; default: cout << lpNr->dwType << endl; } cout << "dwDisplayType:"; switch(lpNr->dwDisplayType) { case RESOURCEDISPLAYTYPE_DOMAIN: cout << "RESOURCEDISPLAYTYPE_DOMAIN" << endl; break; case RESOURCEDISPLAYTYPE_SERVER: cout << "RESOURCEDISPLAYTYPE_SERVER" << endl; break; case RESOURCEDISPLAYTYPE_SHARE: cout << "RESOURCEDISPLAYTYPE_SHARE" << endl; break; case RESOURCEDISPLAYTYPE_GENERIC: cout << "RESOURCEDISPLAYTYPE_GENERIC" << endl; break; case RESOURCEDISPLAYTYPE_NETWORK: cout << "RESOURCEDISPLAYTYPE_NETWORK" << endl; break; default: cout << lpNr->dwDisplayType << endl; } cout << "dwUsage:"; switch(lpNr->dwUsage) { case RESOURCEUSAGE_CONNECTABLE: cout << "RESOURCEUSAGE_CONNECTABLE" << endl; break; case RESOURCEUSAGE_CONTAINER: cout << "RESOURCEUSAGE_CONTAINER" << endl; break; case (RESOURCEUSAGE_RESERVED + RESOURCEUSAGE_CONTAINER): cout << "RESOURCEUSAGE_RESERVED + RESOURCEUSAGE_CONTAINER" << endl; break; default: cout << lpNr->dwUsage << endl; } cout << "lpLocalName:"; if (NULL != lpNr->lpLocalName) { cout << lpNr->lpLocalName; } cout << "/n"; cout << "lpRemoteName:"; if (NULL != lpNr->lpRemoteName) { cout << lpNr->lpRemoteName; } cout << "/n"; cout << "lpComment:"; if (NULL != lpNr->lpComment) { cout << lpNr->lpComment; } cout << "/n"; cout << "lpProvider:"; if (NULL != lpNr->lpProvider) { cout << lpNr->lpProvider; } cout << "/n"; cout << "==========================================/n/n"; } BOOL WINAPI EnumerateFunc(LPNETRESOURCE lpnr) { DWORD dwResult, dwResultEnum; HANDLE hEnum; DWORD cbBuffer = 16384; // 16K is a good size DWORD cEntries = -1; // enumerate all possible entries LPNETRESOURCE lpnrLocal; // pointer to enumerated structures DWORD i; // // Call the WNetOpenEnum function to begin the enumeration. // dwResult = WNetOpenEnum(RESOURCE_GLOBALNET, // all network resources RESOURCETYPE_ANY, // all resources 0, // enumerate all resources lpnr, // NULL first time the function is called &hEnum); // handle to the resource if (dwResult != NO_ERROR) { // // Process errors with an application-defined error handler. // NetErrorHandler(dwResult, (LPSTR)"WNetOpenEnum"); return FALSE; } // // Call the GlobalAlloc function to allocate resources. // lpnrLocal = (LPNETRESOURCE) GlobalAlloc(GPTR, cbBuffer); if (lpnrLocal == NULL) return FALSE; do { // // Initialize the buffer. // ZeroMemory(lpnrLocal, cbBuffer); // // Call the WNetEnumResource function to continue // the enumeration. // dwResultEnum = WNetEnumResource(hEnum, // resource handle &cEntries, // defined locally as -1 lpnrLocal, // LPNETRESOURCE &cbBuffer); // buffer size // // If the call succeeds, loop through the structures. // if (dwResultEnum == NO_ERROR) { for(i = 0; i < cEntries; i++) { // Call an application-defined function to // display the contents of the NETRESOURCE structures. // DisplayStruct(&lpnrLocal[i]); // If the NETRESOURCE structure represents a container resource, // call the EnumerateFunc function recursively. if(RESOURCEUSAGE_CONTAINER == (lpnrLocal[i].dwUsage & RESOURCEUSAGE_CONTAINER)) { if(!EnumerateFunc(&lpnrLocal[i])) { NetErrorHandler(555555, "EnumerateFunc returned FALSE."); } } } } // Process errors. // else if (dwResultEnum != ERROR_NO_MORE_ITEMS) { NetErrorHandler(dwResultEnum, (LPSTR)"WNetEnumResource"); break; } } // // End do. // while(dwResultEnum != ERROR_NO_MORE_ITEMS); // // Call the GlobalFree function to free the memory. // GlobalFree((HGLOBAL)lpnrLocal); // // Call WNetCloseEnum to end the enumeration. // dwResult = WNetCloseEnum(hEnum); if(dwResult != NO_ERROR) { // // Process errors. // NetErrorHandler(dwResult, (LPSTR)"WNetCloseEnum"); return FALSE; } return TRUE; } void wmain() { EnumerateFunc(NULL); }

dwScope:RESOURCE_GLOBALNET
dwType:RESOURCETYPE_ANY
dwDisplayType:RESOURCEDISPLAYTYPE_NETWORK
dwUsage:RESOURCEUSAGE_RESERVED + RESOURCEUSAGE_CONTAINER
lpLocalName:
lpRemoteName:Microsoft Terminal Services
lpComment:
lpProvider:Microsoft Terminal Services
==========================================

dwScope:RESOURCE_GLOBALNET
dwType:RESOURCETYPE_ANY
dwDisplayType:RESOURCEDISPLAYTYPE_NETWORK
dwUsage:RESOURCEUSAGE_RESERVED + RESOURCEUSAGE_CONTAINER
lpLocalName:
lpRemoteName:Microsoft Windows Network
lpComment:
lpProvider:Microsoft Windows Network
==========================================

dwScope:RESOURCE_GLOBALNET
dwType:RESOURCETYPE_ANY
dwDisplayType:RESOURCEDISPLAYTYPE_DOMAIN
dwUsage:RESOURCEUSAGE_CONTAINER
lpLocalName:
lpRemoteName:MSHOME
lpComment:
lpProvider:Microsoft Windows Network
==========================================

dwScope:RESOURCE_GLOBALNET
dwType:RESOURCETYPE_ANY
dwDisplayType:RESOURCEDISPLAYTYPE_SERVER
dwUsage:RESOURCEUSAGE_CONTAINER
lpLocalName:
lpRemoteName://USA-SUN
lpComment:sun
lpProvider:Microsoft Windows Network
==========================================

dwScope:RESOURCE_GLOBALNET
dwType:RESOURCETYPE_DISK
dwDisplayType:RESOURCEDISPLAYTYPE_SHARE
dwUsage:RESOURCEUSAGE_CONNECTABLE
lpLocalName:
lpRemoteName://USA-SUN/汽车驾驶
lpComment:
lpProvider:Microsoft Windows Network
==========================================

dwScope:RESOURCE_GLOBALNET
dwType:RESOURCETYPE_DISK
dwDisplayType:RESOURCEDISPLAYTYPE_SHARE
dwUsage:RESOURCEUSAGE_CONNECTABLE
lpLocalName:
lpRemoteName://USA-SUN/陈式太极拳
lpComment:
lpProvider:Microsoft Windows Network
==========================================

dwScope:RESOURCE_GLOBALNET
dwType:RESOURCETYPE_ANY
dwDisplayType:RESOURCEDISPLAYTYPE_NETWORK
dwUsage:RESOURCEUSAGE_RESERVED + RESOURCEUSAGE_CONTAINER
lpLocalName:
lpRemoteName:Web Client Network
lpComment:
lpProvider:Web Client Network
==========================================

2，分析

a WNet遍历的列表和系统网上邻居的列表一致；

b 网上邻居经常出现域登录权限问题，列表中显示不了却可以smb访问等等奇怪问题；

c WNetEnumResource可以使用lpRemoteName遍历，获取共享资源列表。

3，修改主函数，尝试使用ip地址遍历网络资源。

void wmain() { NETRESOURCE tNetRs; memset(&tNetRs, 0, sizeof(NETRESOURCE)); tNetRs.dwScope = RESOURCE_GLOBALNET; tNetRs.dwType = RESOURCETYPE_ANY; tNetRs.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER; tNetRs.dwUsage = RESOURCEUSAGE_CONTAINER; tNetRs.lpRemoteName = "////192.168.0.145"; tNetRs.lpProvider = "Microsoft Windows Network"; EnumerateFunc(&tNetRs); }

dwScope:RESOURCE_GLOBALNET
dwType:RESOURCETYPE_DISK
dwDisplayType:RESOURCEDISPLAYTYPE_SHARE
dwUsage:RESOURCEUSAGE_CONNECTABLE
lpLocalName:
lpRemoteName://192.168.0.145/毕业设计
lpComment:
lpProvider:Microsoft Windows Network
==========================================

结论：

1 使用ip遍历的方法是可行的。

2 关于域登录错误的问题需要另找办法。

3 “//192.168.0.145/毕业设计”目录下还有子目录，但是没有能递归下去。