How to find Is another PC in the same network is alive from PC?

Hai all,

I'm using VC++6.0

Scope of problem:
PC1 wants to continuosly checking PC2's Ethernet Status, Whether PC2 is connected to the Network or not.

I have found one function.

IsDestinationReachable(IPAddress,lpQOCInfo)...

but is not identifing when the ethernet cable is plugged of from PC2.

May i know why?

Is there any other function available to find it?

If you have file sharing enabled between two PCs then you can try to access a folder on another machine like this:

\\server\share\folder_path

For that you can use any API that takes the above line, say GetFileAttributes() and check the error returned by GetLastError() if any.

Hi...

No.. but I didn't need any files or shared folder kind of that.
Rather I need to check the Ethernet status alone..
Is it possible with any other function?

Suppose a Ethernet of the PC1 has gone... PC1 can detect itself by using
IsNetworkAlive(), likewise IS there any other functions supporting to that?

With regards,
Saravana

Try using Sockets, they are designed for networking developement. I believe you can also access the MAC ADRESS and interegate the network card.

Here you go:

http://www.codeguru.com/cpp/i-n/netw...icle.php/c5451

Ya.. I was usually try with CSocket. But do they offer any functions to find my needs out?
Sorry I'm a beginner to Network programming.

Quote:

---

Originally Posted by hotsaravana

Hi...

Suppose a Ethernet of the PC1 has gone... PC1 can detect itself by using
IsNetworkAlive(), likewise IS there any other functions supporting to that?

With regards,
Saravana

---

Have a look at "IcmpSendEcho()" API... It seems to be helpful for you....

Hope this helps :)

Thanks,

Ya. I have tried with IcmpSendEcho() function.

It shows errors like this.. when i'm tring to execute the sample program.



c:\program files\microsoft visual studio\vc98\include\icmpapi.h(175) : error C2061: syntax error : identifier 'IPAddr'
c:\program files\microsoft visual studio\vc98\include\icmpapi.h(264) : error C2061: syntax error : identifier 'IPAddr'
c:\program files\microsoft visual studio\vc98\include\icmpapi.h(288) : error C2061: syntax error : identifier 'PIP_OPTION_INFORMATION'
C:\Documents and Settings\saravanamuthu\Desktop\Client & Server POC\Client & Server POC\Server\MainFrm.cpp(188) : error C2660: 'IcmpSendEcho' : function does not take 8 parameters

But it actually takes only 8 parameters, like that only its specified in it?

kindly help me out...

Make sure to include Icmpapi.h and add Iphlpapi.lib to your project settings.

Here is an E.g code snippet:

Code:

---

char SendData[] = "Data Buffer";
LPVOID ReplyBuffer;
DWORD dwRetVal = 0;
...
HANDLE hIcmpFile = NULL;
hIcmpFile = IcmpCreateFile();
...check if opened successfully...Don't forget to close with IcmpCloseHandle(hIcmpFile) after using it.
...
ReplyBuffer = (VOID*) malloc(sizeof(ICMP_ECHO_REPLY) + strlen(SendData) + 1);
DWORD buflen;
buflen = sizeof(ICMP_ECHO_REPLY) + strlen(SendData) + 1;

if ((dwRetVal = IcmpSendEcho(hIcmpFile,
        inet_addr(_T("192.168.200.140")),
        SendData,
        strlen(SendData),
        NULL,
        ReplyBuffer,
        buflen,
        1000)) != 0)
}

---

Hope this helps, ;)

Thanks,

Thanks in advance.
Actually I had one doubt,
In my Visual Studio 6.0, there is no such header files or library files.
So, I just copied that files from the Visual Studio 2005.net system and attempt to run it? I know this is not the right way to do. can u suggest any way? Is those files are got from any where?

I thought these errors are occured, only becoz i have copied from VS2005.Net. I think so.

Suggest me some way to get it out.

You need to install Microsoft Platform SDK for Windows on your system to get those files. ;)

Thanks,