网上找的一个C++写的扫描局域网主机信息的程序，部分代码看不懂，求大神指导，非常感谢

[karim_耿大少]

void CNeighborInfoDlg::ReceiveMessage()
{
BYTE Buf[500];
//m_UDPSocket.Receive(Buf,500,0);
static CString strOldIP;
CString str,strIP,strHost,strHex,strMac,Host,Group,User;
UINT dport;
m_socket.ReceiveFrom(Buf,500,strIP,dport,0);

if(strIP==(char)NULL||strIP==strOldIP)return;
strOldIP=strIP;

//ip
int index=m_ListView.InsertItem(0,strIP);

strHost="";
strHex="";
User="?";
Host="\\";

int tem=0,num=0;
bool bAdd=true;

for(int i=0;i<500;i++)
{
if(i%50==0)
TRACE("\n");
TRACE("%c",Buf[i]);
}

//nbtstat前面的57个字节是
for(i=57;i<500;i++) //57-72
{
//end
if(Buf[i]==0xcc)
break;

if(Buf[i]==0x20)
bAdd=false;
if(bAdd)
{
str.Format("%c",Buf[i]);
if(Buf[i]>=' ')strHost+=str;

str.Format("%02x.",Buf[i]);
strHex+=str;
}

if((++tem)%18==0)
{
bAdd=true;
//m_ListBox.AddString(strHost);//
strHost.TrimRight((char)NULL);
if(strHost=="")
{
strMac.Delete(17,strMac.GetLength()-17);
m_ListView.SetItem(index,4,LVIF_TEXT,strMac, 0, 0, 0,0);
break;
}

if(num==0&&strHost!="")
{
m_ListView.SetItem(index,2,LVIF_TEXT,strHost, 0, 0, 0,0);
Host=strHost;
num++;
}
else
{
if(Host!=strHost&&num==1&&strHost!="")
{
m_ListView.SetItem(index,1,LVIF_TEXT,strHost, 0, 0, 0,0);
Group=strHost;
num++;
}
else
{
if(strHost!=Host&&strHost!=Group&&num==2&&strHost!="")
{
User=strHost;
if(User!="__MSBROWSE__")
{
m_ListView.SetItem(index,3,LVIF_TEXT,User, 0, 0, 0,0);
num++;
}
}
}

}

strMac=strHex;
strHost="";
strHex="";

}

}

SetEvent(wait_handle);
}

[lilianjie001]

不会是每一行都给你注释出来吧

[karim_耿大少]

主要是//nbtstat前面的57个字节是 下边的这些代码，能大概讲一下是干什么的，是什么意思就可以了，谢谢了

[赵4老师]

C:\>nbtstat /? Displays protocol statistics and current TCP/IP connections using NBT (NetBIOS over TCP/IP). NBTSTAT [ [-a RemoteName] [-A IP address] [-c] [-n] [-r] [-R] [-RR] [-s] [-S] [interval] ] -a (adapter status) Lists the remote machine's name table given its name -A (Adapter status) Lists the remote machine's name table given its IP address. -c (cache) Lists NBT's cache of remote [machine] names and their IP addresses -n (names) Lists local NetBIOS names. -r (resolved) Lists names resolved by broadcast and via WINS -R (Reload) Purges and reloads the remote cache name table -S (Sessions) Lists sessions table with the destination IP addresses -s (sessions) Lists sessions table converting destination IP addresses to computer NETBIOS names. -RR (ReleaseRefresh) Sends Name Release packets to WINS and then, starts Refresh RemoteName Remote host machine name. IP address Dotted decimal representation of the IP address. interval Redisplays selected statistics, pausing interval seconds between each display. Press Ctrl+C to stop redisplaying statistics.