vc下不重启改ip、网关、dns

原文地址：http://hi.baidu.com/9908006/blog/item/bed174998952a8186f068c3e.html 看雪上某人发表的，貌似其它都可以改，就是dns有些问题，研究后发现，原来是类型有问题，改了后正常运行了 //VC-ConsoleWithApi #include <windows.h> #include <string> #include <iostream> #pragma comment(lib,"Ws2_32.lib") using namespace std; void GetLanAdapterName( char* szLanAdapterName ); BOOL RegIP( LPCTSTR lpszAdapterName, LPCTSTR pIPAddress, LPCTSTR pNetMask, LPCTSTR pNetGate, LPCTSTR pDNSServer1, LPCTSTR pDNSServer2 ); BOOL NotifyIPChange( LPCTSTR lpszAdapterName, int nIndex, LPCTSTR pIPAddress, LPCTSTR pNetMask ); int main() { char AdapterName[ MAX_PATH ] =""; GetLanAdapterName( AdapterName ); RegIP( AdapterName, "172.20.10.252","255.255.255.0", "172.20.10.1", "211.136.17.107", "211.136.18.171" ); NotifyIPChange( AdapterName, 0, "172.20.10.252", "172.20.10.1" ); return 0; } //读取注册表取得适配器名称 void GetLanAdapterName(char* szLanAdapterName) { HKEY hKey, hSubKey, hNdiIntKey; if( ::RegOpenKeyEx( HKEY_LOCAL_MACHINE, "System\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}", 0, KEY_READ, &hKey ) != ERROR_SUCCESS ) return; DWORD dwIndex = 0; DWORD dwBufSize = 256; DWORD dwDataType; char szSubKey[256]; unsigned char szData[256]; while( ::RegEnumKeyEx( hKey, dwIndex++, szSubKey, &dwBufSize, NULL, NULL, NULL, NULL ) == ERROR_SUCCESS ) { if( ::RegOpenKeyEx( hKey, szSubKey, 0, KEY_READ, &hSubKey ) == ERROR_SUCCESS ) { if( ::RegOpenKeyEx( hSubKey, "Ndi\\Interfaces", 0, KEY_READ, &hNdiIntKey ) == ERROR_SUCCESS ) { dwBufSize = 256; if( ::RegQueryValueEx( hNdiIntKey, "LowerRange", 0, &dwDataType, szData, &dwBufSize ) == ERROR_SUCCESS ) { if( strcmp( (char*)szData, "ethernet" ) == 0 ) // 判断是不是以太网卡 { dwBufSize = 256; if( ::RegQueryValueEx( hSubKey, "DriverDesc", 0, &dwDataType, szData, &dwBufSize ) == ERROR_SUCCESS ) { // szData 中便是适配器详细描述 dwBufSize = 256; if( ::RegQueryValueEx( hSubKey, "NetCfgInstanceID", 0, &dwDataType, szData, &dwBufSize ) == ERROR_SUCCESS ) { //szData中便是适配器名称 strcpy( szLanAdapterName, (const char *)szData ); break; } } } } ::RegCloseKey( hNdiIntKey ); } ::RegCloseKey(hSubKey); } dwBufSize = 256; } /* end of while */ ::RegCloseKey(hKey); } BOOL RegIP( LPCTSTR lpszAdapterName, LPCTSTR pIPAddress, LPCTSTR pNetMask, LPCTSTR pNetGate, LPCTSTR pDNSServer1, LPCTSTR pDNSServer2 ) { HKEY hKey; string strKeyName = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\"; strKeyName += lpszAdapterName; if( ::RegOpenKeyEx( HKEY_LOCAL_MACHINE, strKeyName.c_str(), 0, KEY_WRITE, &hKey ) != ERROR_SUCCESS ) return FALSE; string DNSServer = pDNSServer1; DNSServer += ","; DNSServer += pDNSServer2; char mszIPAddress[ 100 ]; char mszNetMask[ 100 ]; char mszNetGate[ 100 ]; char mszDNSServer[ 100 ]; strncpy( mszIPAddress, pIPAddress, 98 ); strncpy( mszNetMask, pNetMask, 98 ); strncpy( mszNetGate, pNetGate, 98 ); strncpy( mszDNSServer, DNSServer.c_str(), 98 ); int nIP, nMask, nGate, nDNSServer; nIP = strlen( mszIPAddress ); nMask = strlen( mszNetMask ); nGate = strlen( mszNetGate ); nDNSServer = strlen( mszDNSServer ); *( mszIPAddress + nIP + 1 ) = 0x00; // REG_MULTI_SZ数据需要在后面再加个0 nIP += 2; *( mszNetMask + nMask + 1 ) = 0x00; nMask += 2; *( mszNetGate + nGate + 1 ) = 0x00; nGate += 2; *( mszDNSServer + nDNSServer + 1 ) = 0x00; nGate += 2; ::RegSetValueEx( hKey, "IPAddress", 0, REG_MULTI_SZ, (unsigned char*)mszIPAddress, nIP ); ::RegSetValueEx( hKey, "SubnetMask", 0, REG_MULTI_SZ, (unsigned char*)mszNetMask, nMask ); ::RegSetValueEx( hKey, "DefaultGateway", 0, REG_MULTI_SZ, (unsigned char*)mszNetGate, nGate ); ::RegSetValueEx( hKey, "NameServer", 0, REG_SZ, (unsigned char*)mszDNSServer, nDNSServer ); ::RegCloseKey(hKey); return TRUE; } //未公开函数DhcpNotifyConfigChange位于 dhcpcsvc.dll中. //原型声明 typedef BOOL ( CALLBACK* DHCPNOTIFYPROC) ( LPWSTR lpwszServerName, // 本地机器为NULL LPWSTR lpwszAdapterName, // 适配器名称 BOOL bNewIpAddress, // TRUE表示更改IP DWORD dwIpIndex, // 指明第几个IP地址，如果只有该接口只有一个IP地址则为0 DWORD dwIpAddress, // IP地址 DWORD dwSubNetMask, // 子网掩码 int nDhcpAction // 对DHCP的操作 0:不修改, 1:启用 DHCP，2:禁用 DHCP ); BOOL NotifyIPChange( LPCTSTR lpszAdapterName, int nIndex, LPCTSTR pIPAddress, LPCTSTR pNetMask ) { BOOL bResult = FALSE; HINSTANCE hDhcpDll; DHCPNOTIFYPROC pDhcpNotifyProc; WCHAR wcAdapterName[256]; MultiByteToWideChar( CP_ACP, 0, lpszAdapterName, -1, wcAdapterName,256 ); if( ( hDhcpDll = ::LoadLibrary("dhcpcsvc.dll") ) == NULL ) return FALSE; if( ( pDhcpNotifyProc = (DHCPNOTIFYPROC)::GetProcAddress( hDhcpDll, "DhcpNotifyConfigChange" ) ) != NULL ) if( (pDhcpNotifyProc)(NULL, wcAdapterName, TRUE, nIndex, inet_addr(pIPAddress), inet_addr(pNetMask), 0 ) == ERROR_SUCCESS ) bResult = TRUE; ::FreeLibrary(hDhcpDll); return bResult; }