探测远程主机的NetBIOS信息
可探测远程主机的NetBIOS信息,包括操作系统指纹,共享目录,用户与组,传输列表及其他信息。您可以在中华安全网(SafeChina)下载此软件。大家一提到Windows2000/XP系统的安全性,很快就会想到NULL Session(空会话)。这可以算是微软安置的一个后门,很多简单而容易的攻击都是基于空会话而实现的。在此,我们不讨论如何攻陷一台Windows2000/XP系统,而是要谈谈在建立空会话之后,我们可以得到远程主机的哪些NetBIOS信息。(由于本文是针对Windows2000/XP系统,所以使用了UNICODE编码)。
一)NetBIOS信息
在我们和远程Windows2000/XP主机建立了空会话之后,我们就有权枚举系统里的各项NetBIOS信息了。当然在某些选项中需要较高的权利,不过我们只执行那些匿名用户可以获得的绝大多数系统信息。
时间:探测远程主机的当前日期和时间信息。它会返回一个数据结构,包括年,月,日,星期,时,分,秒等等。不过得到的是GMT标准时间,当然对于我们来说就应该换算为GMT+8:00了。由此可以判断出主机所在的时区信息。
操作系统指纹:探测远程主机的操作系统指纹信息。一共有三种级别的探测(100,101,102),我们使用的是101级,它会返回一个数据结构,可以获取远程主机的平台标识,服务器名称,操作系统的主次版本(Windows2000为5.0,WindowsXP为5.1,而最新操作系统Longhorn的版本为6.0),服务器类型(每台主机可能同时包含多种类型信息)和注释。
共享列表:探测远程主机的共享列表。我们可以获得一个数据结构指针,枚举远程主机的所有共享信息(隐藏的共享列表在内)。其中包括共享名称,类型与备注。类型可分为:磁盘驱动器,打印队列,通讯设备,进程间通讯与特殊设备。
用户列表: 探测远程主机的用户列表,返回一个数据结构指针,枚举所有用户信息。可获取用户名,全名,用户标识符,说明与标识信息。标识信息可以探测用户的访问权限。
本地组列表: 探测远程主机的本地组列表信息。枚举所有本地组信息,包含本地组名称和注释信息。
组列表: 探测远程主机的组列表信息。枚举所有的组信息,包括组名称,注释,组标识符与属性。在此基础上,我们可以枚举组内的所有用户信息。
组用户列表: 探测特定组内的用户信息。我们可以获得组内所有用户的名称。当我门获得了所有的用户列表,下一步就应该很清楚了,那就是挂一个字典进行破解了。
传输协议列表: 探测远程主机的传输协议信息,枚举所有的传输列表。可以获得每个传输协议的名称,地址,网络地址和当前与本传输协议连接的用户数目。
会话列表: 探测远程主机的当前会话列表。枚举每个会话的相关信息,包括客户端主机的名称,当前用户的名称,活动时间和空闲时间。这可以帮助我们了解远程主机用户的喜好等等。
二)主要函数与相关数据结构分析
1. 建立空会话
WNetAddConnection2(&nr,username,password,0);
//nr为NETRESOURCE数据结构的对象;
//username为建立空会话的用户名,在此将用户名设置为NULL;
//password为登陆密码,在此将密码设置为NULL;
2. 撤消空会话
WNetCancelConnection2(ipc,0,TRUE);
//ipc为TCHAR的指针,我们可以这样获得:
//swprintf(ipc,_T("\\\\%s\\ipc$"),argv),argv为主机名或地址;
3. 探测主机时间
nStatus=NetRemoteTOD(server,(PBYTE*)&pBuf);
//参数server为主机的名称或地址;
//pBuf为TIME_OF_DAY_INFO数据结构的指针;
//nStatus为NET_API_STATUS成员;
4. 探测操作系统指纹
NetServerGetInfo(server,dwLevel,(PBYTE *)&pBuf);
//dwLevel为等级数,我们选择的是101级;
//pBuf是SERVER_INFO_101数据结构的指针;
5. 探测共享列表
NetShareEnum(server,dwLevel,(PBYTE *)&pBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
//dwLevel的等级数为1级;
//pBuf是SHARE_INFO_1数据结构的指针;
//MAX_PREFERRED_LENGTH指定返回数据的长度;
//er指明返回的实际可以枚举的成员数目;
//tr返回所有的成员数目;
//resume用于继续进行共享搜索;
6. 探测用户列表
NetQueryDisplayInformation(server,dwLevel,i,100,0xFFFFFFFF,&dwRec,(PVOID *)&pBuf);
//dwLevel的等级数为1级;
//i为枚举的索引;
//dwRec返回获取的信息数目;
//pBuf为NET_DISPLAY_USER数据结构的指针;
7. 探测本地组列表
NetLocalGroupEnum(server,dwLevel,(PBYTE *)&pBuf,-1,&er,&tr,&resume);
//dwLevel的等级是1;
//pBuf返回LOCALGROUP_INFO_1数据结构的指针;
8. 探测组列表
NetQueryDisplayInformation(server,dwLevel,i,100,0xFFFFFFFF,&dwRec,(PVOID*)&pGBuf);
//dwLevel的等级为3;
//pGBuf返回NET_DISPLAY_GROUP的数据结构指针;
9. 探测组内的用户
NetGroupGetUsers(server,pGBuffer->grpi3_name,0,(PBYTE *)&pUBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
//pGBuffer->grpi3_name为组的名称;
//pUBuf返回GROUP_USERS_INFO_0数据结构的指针;
10.探测传输协议列表
NetServerTransportEnum(server,dwLevel,(PBYTE *)&pBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
//dwLevel的等级为0级;
//pBuf返回SERVER_TRANSPORT_INFO_0数据结构的指针;
11.探测会话列表
NetSessionEnum(server,pszClient,pszUser,dwLevel,(PBYTE *)&pBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
//pszClient指定客户的地址;
//pszUser指定用户名;
//dwLevel的等级是10级;
//pBuf返回SESSION_INFO_10数据结构的指针;
12.释放内存
NetApiBufferFree(pBuf);
//释放由系统分配的内存空间。
三) 如何防止NetBIOS信息的泄露
我们可以安装防火墙来禁止空会话的建立,或者我们可以在网络连接属性里禁用TCP/IP上的NetBIOS,当然也可以在IP安全策略里禁用445/tcp端口来实现。只要空会话不能成功建立,那就很难获得上面提到的各项信息了。
四) 源代码
#defineUNICODE
#define_UNICODE
#include <windows.h>
#include <winnetwk.h>
#include <tchar.h>
#include <lm.h>
#pragmacomment (lib,"mpr")
#pragmacomment (lib,"netapi32")
void start();
void usage();
intdatetime(PTSTR server);
intfingerprint(PTSTR server);
intnetbios(PTSTR server);
intusers(PTSTR server);
intlocalgroup(PTSTR server);
intglobalgroup(PTSTR server);
inttransport(PTSTR server);
intsession(PTSTR server);
int wmain(int argc,TCHAR *argv[])
{
NETRESOURCE nr;
DWORD ret;
TCHAR username=_T("");
TCHAR password=_T("");
TCHAR ipc=_T("");
system("cls.exe");
start();
if(argc!=2)
{
usage();
return -1;
}
swprintf(ipc,_T("\\\\%s\\ipc$"),argv);
nr.lpLocalName=NULL;
nr.lpProvider=NULL;
nr.dwType=RESOURCETYPE_ANY;
nr.lpRemoteName=ipc;
ret=WNetAddConnection2(&nr,username,password,0);
if(ret!=ERROR_SUCCESS)
{
_tprintf(_T("\nIPC$ Connect Failed.\n"));
return -1;
}
datetime(argv);
fingerprint(argv);
netbios(argv);
users(argv);
localgroup(argv);
globalgroup(argv);
transport(argv);
session(argv);
ret=WNetCancelConnection2(ipc,0,TRUE);
if(ret!=ERROR_SUCCESS)
{
_tprintf(_T("IPC$ Disconnect Failed.\n"));
return -1;
}
return 0;
}
void start()
{
_tprintf(_T("=====[ T-SMB Scan, by TOo2y ]=====\n"));
_tprintf(_T("=====[ E-mail: TOo2y@safechina.net ]=====\n"));
_tprintf(_T("=====[ HomePage: http://www.safechina.net/ ]=====\n"));
_tprintf(_T("=====[ Date: 12-12-2002 ]=====\n"));
}
void usage()
{
_tprintf(_T("\nUsage:\tT-SMBRemoteIP"));
}
int datetime(PTSTR server)
{
PTIME_OF_DAY_INFOpBuf=NULL;
NET_API_STATUS nStatus;
DWORD lerror;
_tprintf(_T("\n*** Date and Time ***\n"));
nStatus=NetRemoteTOD(server,(PBYTE*)&pBuf);
if(nStatus==NERR_Success)
{
if(pBuf!=NULL)
{
_tprintf(_T("\nCurrent date:\t%.2d-%.2d-%d"),pBuf->tod_month,pBuf->tod_day,pBuf->tod_year);
_tprintf(_T("\nCurrent time:\t%.2d:%.2d:%.2d.%.2d (GMT)"),pBuf->tod_hours,pBuf->tod_mins,pBuf->tod_secs,pBuf->tod_hunds);
pBuf->tod_hours=(pBuf->tod_hours+8)%24;
_tprintf(_T("\nCurrent time:\t%.2d:%.2d:%.2d.%.2d (GMT+08:00)\n"),pBuf->tod_hours,pBuf->tod_mins,pBuf->tod_secs,pBuf->tod_hunds);
}
}
else
{
lerror=GetLastError();
if(lerror==997)
{
_tprintf(_T("\nDateTime:\tOverlapped I/O operation is in progress. \n"));
}
else
{
_tprintf(_T("\nDatetime Error:\t%d\n"),lerror);
}
}
if(pBuf!=NULL)
{
NetApiBufferFree(pBuf);
}
return 0;
}
int fingerprint(PTSTR server)
{
DWORD dwlength;
DWORD dwLevel;
NET_API_STATUS nStatus;
PSERVER_INFO_101 pBuf;
DWORD lerror;
dwLevel=101;
pBuf=NULL;
dwlength=_tcslen(server);
_tprintf(_T("\n**** Fingerprint ****\n"));
nStatus=NetServerGetInfo(server,dwLevel,(PBYTE *)&pBuf);
if(nStatus==NERR_Success)
{
_tprintf(_T("\nComputername:\t%s"),pBuf->sv101_name);
_tprintf(_T("\nComment:\t%s"),pBuf->sv101_comment);
_tprintf(_T("\nPlatform:\t%d"),pBuf->sv101_platform_id);
_tprintf(_T("\nVersion:\t%d.%d"),pBuf->sv101_version_major,pBuf->sv101_version_minor);
_tprintf(_T("\nType:"));
if(pBuf->sv101_type & SV_TYPE_NOVELL)
{
_tprintf(_T("\t\tNovell server.\n"));
}
if(pBuf->sv101_type & SV_TYPE_XENIX_SERVER)
{
_tprintf(_T("\t\tXenix server.\n"));
}
if(pBuf->sv101_type & SV_TYPE_DOMAIN_ENUM)
{
_tprintf(_T("\t\tPrimary domain .\n"));
}
if(pBuf->sv101_type & SV_TYPE_TERMINALSERVER)
{
_tprintf(_T("\t\tTerminal Server.\n"));
}
if(pBuf->sv101_type & SV_TYPE_WINDOWS)
{
_tprintf(_T("\t\tWindows 95 or later.\n"));
}
if(pBuf->sv101_type & SV_TYPE_SERVER)
{
_tprintf(_T("\t\tA LAN Manager server.\n"));
}
if(pBuf->sv101_type & SV_TYPE_WORKSTATION)
{
_tprintf(_T("\t\tA LAN Manager workstation.\n"));
}
if(pBuf->sv101_type & SV_TYPE_PRINTQ_SERVER)
{
_tprintf(_T("\t\tServer sharing print queue.\n"));
}
if(pBuf->sv101_type & SV_TYPE_DOMAIN_CTRL)
{
_tprintf(_T("\t\tPrimary domain controller.\n"));
}
if(pBuf->sv101_type & SV_TYPE_DOMAIN_BAKCTRL)
{
_tprintf(_T("\t\tBackup domain controller.\n"));
}
if(pBuf->sv101_type & SV_TYPE_AFP)
{
_tprintf(_T("\t\tApple File Protocol server.\n"));
}
if(pBuf->sv101_type & SV_TYPE_DOMAIN_MEMBER)
{
_tprintf(_T("\t\tLAN Manager 2.x domain member.\n"));
}
if(pBuf->sv101_type & SV_TYPE_LOCAL_LIST_ONLY)
{
_tprintf(_T("\t\tServers maintained by the browser.\n"));
}
if(pBuf->sv101_type & SV_TYPE_DIALIN_SERVER)
{
_tprintf(_T("\t\tServer running dial-in service.\n"));
}
if(pBuf->sv101_type & SV_TYPE_TIME_SOURCE)
{
_tprintf(_T("\t\tServer running the Timesource service.\n"));
}
if(pBuf->sv101_type & SV_TYPE_SERVER_MFPN)
{
_tprintf(_T("\t\tMicrosoft File and Print for NetWare.\n"));
}
if(pBuf->sv101_type & SV_TYPE_NT)
{
_tprintf(_T("\t\tWindows NT/2000/XP workstation or server.\n"));
}
if(pBuf->sv101_type & SV_TYPE_WFW)
{
_tprintf(_T("\t\tServer running Windows for Workgroups.\n"));
}
if(pBuf->sv101_type & SV_TYPE_POTENTIAL_BROWSER)
{
_tprintf(_T("\t\tServer that can run the browser service.\n"));
}
if(pBuf->sv101_type & SV_TYPE_BACKUP_BROWSER)
{
_tprintf(_T("\t\tServer running a browser service as backup.\n"));
}
if(pBuf->sv101_type & SV_TYPE_MASTER_BROWSER)
{
_tprintf(_T("\t\tServer running the master browser service.\n"));
}
if(pBuf->sv101_type & SV_TYPE_DOMAIN_MASTER)
{
_tprintf(_T("\t\tServer running the domain master browser.\n"));
}
if(pBuf->sv101_type & SV_TYPE_CLUSTER_NT)
{
_tprintf(_T("\t\tServer clusters available in the domain.\n"));
}
if(pBuf->sv101_type & SV_TYPE_SQLSERVER)
{
_tprintf(_T("\t\tAny server running with Microsoft SQL Server.\n"));
}
if(pBuf->sv101_type & SV_TYPE_SERVER_NT)
{
_tprintf(_T("\t\tWindows NT/2000 server that is not a domain controller.\n"));
}
}
else
{
lerror=GetLastError();
if(lerror==997)
{
_tprintf(_T("\nFingerprint:\tOverlapped I/O operation is in progress.\n"));
}
else
{
_tprintf(_T("\nFingerprint Error:\t%d\n"),lerror);
}
}
if(pBuf!=NULL)
{
NetApiBufferFree(pBuf);
}
return 0;
}
int netbios(PTSTR server)
{
DWORD er,tr,resume;
DWORD i,dwLength,dwLevel;
PSHARE_INFO_1 pBuf,pBuffer;
NET_API_STATUS nStatus;
DWORD lerror;
er=0;
tr=0;
resume=0;
dwLevel=1;
dwLength=_tcslen(server);
_tprintf(_T("\n****** Netbios ******\n"));
do
{
nStatus=NetShareEnum(server,dwLevel,(PBYTE *)&pBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
if((nStatus==ERROR_SUCCESS) || (nStatus==ERROR_MORE_DATA))
{
pBuffer=pBuf;
for(i=1;i<=er;i++)
{
_tprintf(_T("\nName:\t\t%s"),pBuffer->shi1_netname);
_tprintf(_T("\nRemark:\t\t%s"),pBuffer->shi1_remark);
_tprintf(_T("\nType:\t\t"));
if(pBuffer->shi1_type==STYPE_DISKTREE)
{
_tprintf(_T("Disk drive.\n"));
}
else if(pBuffer->shi1_type==STYPE_PRINTQ)
{
_tprintf(_T("Print queue.\n"));
}
else if(pBuffer->shi1_type==STYPE_DEVICE)
{
_tprintf(_T("Communication device.\n"));
}
else if(pBuffer->shi1_type==STYPE_IPC)
{
_tprintf(_T("Interprocess communication (IPC).\n"));
}
else if(pBuffer->shi1_type==STYPE_SPECIAL)
{
_tprintf(_T("Special share reserved for interprocess communication (IPC$) or remote administration of the server (ADMIN$).\n"));
}
else
{
_tprintf(_T("\n"));
}
pBuffer++;
}
}
else
{
lerror=GetLastError();
if(lerror==997)
{
_tprintf(_T("\nNetbios:\tOverlapped I/O operation is in progress.\n"));
}
else
{
_tprintf(_T("\nNetbios Error:\t%d\n"),lerror);
}
}
if(pBuf!=NULL)
{
NetApiBufferFree(pBuf);
}
}
while(nStatus==ERROR_MORE_DATA);
return 0;
}
int users(PTSTR server)
{
PNET_DISPLAY_USERpBuf,pBuffer;
DWORD nStatus;
DWORD dwRec;
DWORD i=0;
DWORD lerror;
DWORD dwLevel;
dwLevel=1;
_tprintf(_T("\n******* Users *******\n"));
do
{
nStatus=NetQueryDisplayInformation(server,dwLevel,i,100,0xFFFFFFFF,&dwRec,(PVOID *)&pBuf);
if((nStatus==ERROR_SUCCESS) || (nStatus==ERROR_MORE_DATA))
{
pBuffer=pBuf;
for(;dwRec>0;dwRec--)
{
_tprintf(_T("\nName:\t\t%s"),pBuffer->usri1_name);
_tprintf(_T("\nFull Name:\t%s"),pBuffer->usri1_full_name);
_tprintf(_T("\nUser ID:\t%u"),pBuffer->usri1_user_id);
_tprintf(_T("\nComment: \t%s"),pBuffer->usri1_comment);
_tprintf(_T("\nFlag:"));
if(pBuffer->usri1_flags & UF_ACCOUNTDISABLE)
{
_tprintf(_T("\t\tThe user's account is disabled.\n"));
}
if(pBuffer->usri1_flags & UF_TRUSTED_FOR_DELEGATION)
{
_tprintf(_T("\t\tThe account is enabled for delegation. \n"));
}
if(pBuffer->usri1_flags & UF_LOCKOUT)
{
_tprintf(_T("\t\tThe account is currently locked out (blocked).\n"));
}
if(pBuffer->usri1_flags & UF_SMARTCARD_REQUIRED)
{
_tprintf(_T("\t\tRequires the user to log on to the user account with a smart card. \n"));
}
if(pBuffer->usri1_flags & UF_DONT_REQUIRE_PREAUTH)
{
_tprintf(_T("\t\tThis account does not require Kerberos preauthentication for logon.\n"));
}
if(pBuffer->usri1_flags & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)
{
_tprintf(_T("\t\tThe user's password is stored under reversible encryption in the Active Directory. \n"));
}
if(pBuffer->usri1_flags & UF_NOT_DELEGATED)
{
_tprintf(_T("\t\tMarks the account as \"sensitive\"; other users cannot act as delegates of this user account.\n"));
}
if(pBuffer->usri1_flags & UF_USE_DES_KEY_ONLY)
{
_tprintf(_T("\t\tRestrict this principal to use only Data Encryption Standard (DES) encryption types for keys.\n"));
}
if(pBuffer->usri1_flags & UF_HOMEDIR_REQUIRED)
{
_tprintf(_T("\t\tThe home directory is required. Windows NT/Windows 2000/Windows XP ignores this value.\n"));
}
if(pBuffer->usri1_flags & UF_SCRIPT)
{
_tprintf(_T("\t\tThe logon script executed. This value must be set for LAN Manager 2.0 and Windows NT/2000/XP.\n"));
}
i=pBuffer->usri1_next_index;
pBuffer++;
}
}
else
{
lerror=GetLastError();
if(lerror==997)
{
_tprintf(_T("\nUsers:\t\tOverlapped I/O operation is in progress.\n"));
}
else
{
_tprintf(_T("\nUsers Error:\t%d\n"),lerror);
}
}
if(pBuf!=NULL)
{
NetApiBufferFree(pBuf);
}
}while(nStatus==ERROR_MORE_DATA);
return 0;
}
int localgroup(PTSTR server)
{
NET_API_STATUS nStatus;
PLOCALGROUP_INFO_1pBuf,pBuffer;
DWORD i,dwLevel;
DWORD er,tr,resume;
DWORD lerror;
resume=0;
dwLevel=1;
_tprintf(_T("\n**** Local Group ****\n"));
do
{
nStatus=NetLocalGroupEnum(server,dwLevel,(PBYTE *)&pBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
if((nStatus==NERR_Success) || (nStatus==ERROR_MORE_DATA))
{
pBuffer=pBuf;
for(i=1;i<=er;i++)
{
_tprintf(_T("\nName:\t\t%s"),pBuffer->lgrpi1_name);
_tprintf(_T("\nComment:\t%s"),pBuffer->lgrpi1_comment);
_tprintf(_T("\n"));
pBuffer++;
}
}
else
{
lerror=GetLastError();
if(lerror==997)
{
_tprintf(_T("\nLocal Group:\tOverlapped I/O operation is in progress.\n"));
}
else
{
_tprintf(_T("\nLocal Group Error:\t%d\n"),lerror);
}
}
if(pBuf!=NULL)
{
NetApiBufferFree(pBuf);
}
}while(nStatus==ERROR_MORE_DATA);
return 0;
}
int globalgroup(PTSTR server)
{
PNET_DISPLAY_GROUP pGBuf,pGBuffer;
PGROUP_USERS_INFO_0pUBuf,pUBuffer;
DWORD nGStatus,nUStatus;
DWORD i;
DWORD dwLevel,dwRec;
DWORD k;
DWORD er,tr,resume;
DWORD lerror;
i=0;
er=0;
tr=0;
resume=0;
dwLevel=3;
_tprintf(_T("\n**** Global group ****\n"));
do
{
nGStatus=NetQueryDisplayInformation(server,dwLevel,i,100,0xFFFFFFFF,&dwRec,(PVOID*)&pGBuf);
if((nGStatus==ERROR_SUCCESS) || (nGStatus==ERROR_MORE_DATA))
{
pGBuffer=pGBuf;
for(;dwRec>0;dwRec--)
{
_tprintf(_T("\nName:\t\t%s"),pGBuffer->grpi3_name);
_tprintf(_T("\nComment:\t%s"),pGBuffer->grpi3_comment);
_tprintf(_T("\nGroup ID:\t%u"),pGBuffer->grpi3_group_id);
_tprintf(_T("\nAttributs:\t%u"),pGBuffer->grpi3_attributes);
_tprintf(_T("\nMembers:\t"));
nUStatus=NetGroupGetUsers(server,pGBuffer->grpi3_name,0,(PBYTE *)&pUBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
if(nUStatus==NERR_Success)
{
pUBuffer=pUBuf;
for(k=1;k<=er;k++)
{
_tprintf(_T("%s"),pUBuffer->grui0_name);
pUBuffer++;
}
if(pUBuf!=NULL)
{
NetApiBufferFree(pUBuf);
}
}
_tprintf(_T("\n"));
i=pGBuffer->grpi3_next_index;
pGBuffer++;
}
}
else
{
lerror=GetLastError();
if(lerror==997)
{
_tprintf(_T("\nGlobal Group:\tOverlapped I/O operation is in progress.\n"));
}
else
{
_tprintf(_T("\nGlobal Group Error:\t%d\n"),lerror);
}
}
if(pGBuf!=NULL)
{
NetApiBufferFree(pGBuf);
}
}while(nGStatus==ERROR_MORE_DATA);
return 0;
}
int transport(PTSTR server)
{
NET_API_STATUS nStatus;
PSERVER_TRANSPORT_INFO_0 pBuf,pBuffer;
DWORD dwLevel;
DWORD i;
DWORD er,tr,resume;
DWORD dwTotalCount;
DWORD dwLength;
DWORD lerror;
er=0;
tr=0;
resume=0;
dwLevel=0;
dwTotalCount=0;
_tprintf(_T("\n***** Transport *****\n"));
dwLength=_tcslen(server);
do
{
nStatus=NetServerTransportEnum(server,dwLevel,(PBYTE *)&pBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
if((nStatus==NERR_Success) || (nStatus==ERROR_MORE_DATA))
{
pBuffer=pBuf;
for(i=0;i<er;i++)
{
_tprintf(_T("\nTransport:\t%s"),pBuffer->svti0_transportname);
_tprintf(_T("\nNetworkAddr:\t%s"),pBuffer->svti0_networkaddress);
_tprintf(_T("\nActiveClient:\t%d User(s)\n"),pBuffer->svti0_numberofvcs);
pBuffer++;
dwTotalCount++;
}
}
else
{
lerror=GetLastError();
if(lerror==997)
{
_tprintf(_T("\nTransport:\tOverlapped I/O operation is in progress.\n"));
}
else
{
_tprintf(_T("\nTransport Error:\t%d\n"),lerror);
}
}
if(pBuf!=NULL)
{
NetApiBufferFree(pBuf);
}
}while(nStatus==ERROR_MORE_DATA);
_tprintf(_T("\nTotal of %d entrie(s) enumerated.\n"),dwTotalCount);
return 0;
}
int session(PTSTR server)
{
PSESSION_INFO_10 pBuf,pBuffer;
NET_API_STATUS nStatus;
DWORD i,dwLevel;
DWORD er,tr,resume;
DWORD dwTotalCount;
DWORD dwLength;
PTSTR pszClient;
PTSTR pszUser;
DWORD lerror;
_tprintf(_T("\n****** Session ******\n"));
dwLevel=10;
dwTotalCount=0;
pszClient=NULL;
pszUser=NULL;
er=0;
tr=0;
resume=0;
dwLength=_tcslen(server);
do
{
nStatus=NetSessionEnum(server,pszClient,pszUser,dwLevel,(PBYTE *)&pBuf,MAX_PREFERRED_LENGTH,&er,&tr,&resume);
if((nStatus==NERR_Success) || (nStatus==ERROR_MORE_DATA))
{
pBuffer=pBuf;
for(i=0;i<er;i++)
{
if(pBuffer==NULL)
{
_tprintf(_T("An access violation has occurred.\n"));
break;
}
_tprintf(_T("\nClient:\t\t%s"),pBuffer->sesi10_cname);
_tprintf(_T("\nUser:\t\t%s"),pBuffer->sesi10_username);
_tprintf(_T("\nSeconds Active:\t%d"),pBuffer->sesi10_time);
_tprintf(_T("\nSeconds Idle:\t%d\n"),pBuffer->sesi10_idle_time);
pBuffer++;
dwTotalCount++;
}
}
else
{
lerror=GetLastError();
if(lerror==997)
{
_tprintf(_T("\nSession:\tOverlapped I/O operation is in progress.\n"));
}
else
{
_tprintf(_T("\nSession Error:\t%d\n"),lerror);
}
}
if(pBuf!=NULL)
{
NetApiBufferFree(pBuf);
}
}while(nStatus==ERROR_MORE_DATA);
_tprintf(_T("\nTotal of %d entrie(s) enumerated.\n"),dwTotalCount);
return 0;
}
出错,我编译了程序,但运行时出错,错误号是5
出错,我编译了程序,但运行时出错,错误号是5
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