Thread: getting upload and download bandwidth

i am doing a prog to check the upload and download bandwidth of my computer currently in use

1. i want them to be separate data,upload : 56kb/s, download: 43kb/s. not the sum of the bandwidth together

2. if possible , also separate LAN and internet bandwidth, this is quite hard, i think it involves determining whether the connection is local or internet and sort them out according. or is there a api that does the job

3. number of connections established

anybody knows of any APIs to do the job?

You neglected to mention which OS/Compiler you have to perform all this magic.

But if you're on Linux, then the netstat program does pretty much what you ask.
Since you can get the source code for that, I'd start there for inspiration.

this is barely related to this topic, but when you are using a system(variable); command, where variable is something like 'ping 192.34.0.0' how do you get the information it returns to the screen?

do you use something like strcpy(returnedvalue, system(variable)); ?

>how do you get the information it returns to the screen?
You don't use the system function. You pipe the output from the program in question to your program. The system function returns an int, implementation defined if the argument is not a null pointer.

Say

Code:

char buff[BUFSIZ];
FILE *fp = popen( "ping www.google.com", "r" );
while ( fgets( buff, sizeof buff, fp ) != NULL ) {
  // do stuff with a line of output from ping
}
pclose( fp );

im afraid your answer is completely over my head...

your sample code is writing what the system returns into a file? im so confused just by your syntax.

Here's an idea.
Copy the code into your IDE, put the cursor over each bit you don't understand and press F1 for help.

But F1 doesn't work in emacs...

>But F1 doesn't work in emacs.
He's on win98 not Linux.

Also, what compiler are you using?

I'll search some for this..

>>He's on win98 not Linux.
Emacs is available for Windows 98.

err hello again tronic, nice to see such a friendly person such as yourself again...

anyway tho im on xp... i sorta took over this thread as the author seemingly abandoned it. i guess i shoulda been more specific in my questioning tho. what libs and linkages do i need for that code fragment? im getting the compilation errors below.

error C2065: 'popen' : undeclared identifier

error C2440: 'initializing' : cannot convert from 'int' to 'struct _iobuf *'Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast

error C2065: 'pclose' : undeclared identifier

Gak!
Damn windows doing just enough to try to be POSIX whilst annoying everyone at the same time
Try
_popen
_pclose

Go figure...

Hey, I was linked to this thread from wanting to get the java version. I understand MOST of that :P Sorta....anyway, obviously not enough because the program crashes whenever I try to run that code block. Here is what I tried :

Code:

	char buff[50];
	FILE *fp = _popen("java -version", "r");
	while(fgets(buff, sizeof buff, fp) != NULL) 
	{
		MessageBox(NULL, buff, "Java Return", MB_OK);
	}
	_pclose(fp);
	return 0;

Also, part of this is determining whether or not they have java installed at all. Will the stream return "Bad Command Or File Name" as it does at command line or will it cause problems if "java.exe" doesn't exists?

More specific : The code caused an assertion failure, which I have no idea how to handle.