Hello, I'm trying to make a ping utility, I made a working ICMP request (I tested it with Ethereal, I get a reply from the server). But I wonder how much precise are the std.c.time.time() or the std.date.time(), because I always find a ping of 0ms (I know that it must be 1000 ticks per seconds, but I'm not sure, this really is).
Here is my code :


char[] host = "www.microsoft.com"
InternetHost targetHost;
targetHost.getHostByName(host);

InternetAddress targetAddress = new InternetAddress(targetHost.addrList[0], InternetAddress.PORT_ANY);

Socket pingingSocket = new Socket(AddressFamily.INET, SocketType.RAW, ProtocolType.ICMP);

//pingingSocket.connect(targetAddress);
//long start_time = getUTCtime();
int start_time;
std.c.time.time(&start_time);

pingingSocket.sendTo(PING_REQUEST, targetAddress);

char[] response;
pingingSocket.receive(response);

//long end_time = getUTCtime();
int end_time;
std.c.time.time(&end_time);

// char [] str_ping = std.string.toString((end_time - start_time));
char [] str_ping = std.string.toString((end_time - start_time)/2);
pingingSocket.close();
printf("ping : " ~ str_ping);

As you can see, I tried both std.c.time and std.date functions, but str_ping is always 0. Did I done something wrong ? Should I put the start_time before the resolving getHostByName() ?

--
Abby

Abby (J.P.) wrote:
> Hello, I'm trying to make a ping utility, I made a working ICMP request (I tested it with Ethereal, I get a reply from the server). But I wonder how much precise are the std.c.time.time() or the std.date.time(), because I always find a ping of 0ms (I know that it must be 1000 ticks per seconds, but I'm not sure, this really is).
> Here is my code :
> 
> 
> char[] host = "www.microsoft.com"
> InternetHost targetHost;
> targetHost.getHostByName(host);
> 
> InternetAddress targetAddress = new InternetAddress(targetHost.addrList[0], InternetAddress.PORT_ANY);
> 
> Socket pingingSocket = new Socket(AddressFamily.INET, SocketType.RAW, ProtocolType.ICMP);
> 
> //pingingSocket.connect(targetAddress);
> //long start_time = getUTCtime();
> int start_time;
> std.c.time.time(&start_time);
> 
> pingingSocket.sendTo(PING_REQUEST, targetAddress);
> 
> char[] response;
> pingingSocket.receive(response);
> 
> //long end_time = getUTCtime();
> int end_time;
> std.c.time.time(&end_time);
> 
> // char [] str_ping = std.string.toString((end_time - start_time));
> char [] str_ping = std.string.toString((end_time - start_time)/2);
> pingingSocket.close();
> printf("ping : " ~ str_ping);
> 
> As you can see, I tried both std.c.time and std.date functions, but str_ping is always 0. Did I done something wrong ? Should I put the start_time before the resolving getHostByName() ?
> 
> --
> Abby

I can't ping www.microsoft.com at all, did you try another address, like google.com?

On Wed, 26 Apr 2006 22:09:05 +0200, Abby (J.P.) wrote:

> Hello, I'm trying to make a ping utility, I made a working ICMP request
> (I tested it with Ethereal, I get a reply from the server). But I wonder
> how much precise are the std.c.time.time() or the std.date.time(),
> because I always find a ping of 0ms (I know that it must be 1000 ticks
> per seconds, but I'm not sure, this really is).
> Here is my code :
> 
> char[] host = "www.microsoft.com"
> InternetHost targetHost;
> targetHost.getHostByName(host);
> 
> InternetAddress targetAddress = new InternetAddress(targetHost.addrList[0], InternetAddress.PORT_ANY);
> 
> Socket pingingSocket = new Socket(AddressFamily.INET, SocketType.RAW, ProtocolType.ICMP);
> 
> //pingingSocket.connect(targetAddress);
> //long start_time = getUTCtime();
> int start_time;
> std.c.time.time(&start_time);
> 
> pingingSocket.sendTo(PING_REQUEST, targetAddress);
> 
> char[] response;
> pingingSocket.receive(response);
> 
> //long end_time = getUTCtime();
> int end_time;
> std.c.time.time(&end_time);
> 
> // char [] str_ping = std.string.toString((end_time - start_time));
> char [] str_ping = std.string.toString((end_time - start_time)/2);
> pingingSocket.close();
> printf("ping : " ~ str_ping);
> 
> As you can see, I tried both std.c.time and std.date functions, but str_ping is always 0. Did I done something wrong ? Should I put the start_time before the resolving getHostByName() ?

You might be better to use another undocumented module 'std.perf'.

For example ...

   import std.perf;
   . . .
   ProcessTimesCounter counter = new ProcessTimesCounter();
   counter.start();

   . . .  the stuff you want to time . . .

   counter.stop();
   writefln("Duration: %s microseconds", counter.microseconds);


-- 
Derek
(skype: derek.j.parnell)
Melbourne, Australia
"Down with mediocracy!"
27/04/2006 10:50:33 AM

Tydr Schnubbis wrote:
> Abby (J.P.) wrote:
>> Hello, I'm trying to make a ping utility, I made a working ICMP request (I tested it with Ethereal, I get a reply from the server). But I wonder how much precise are the std.c.time.time() or the std.date.time(), because I always find a ping of 0ms (I know that it must be 1000 ticks per seconds, but I'm not sure, this really is).
>> Here is my code :
>>
>>
>> char[] host = "www.microsoft.com"
>> InternetHost targetHost;
>> targetHost.getHostByName(host);
>>
>> InternetAddress targetAddress = new InternetAddress(targetHost.addrList[0], InternetAddress.PORT_ANY);
>>
>> Socket pingingSocket = new Socket(AddressFamily.INET, SocketType.RAW, ProtocolType.ICMP);
>>
>> //pingingSocket.connect(targetAddress);
>> //long start_time = getUTCtime();
>> int start_time;
>> std.c.time.time(&start_time);
>>
>> pingingSocket.sendTo(PING_REQUEST, targetAddress);
>>
>> char[] response;
>> pingingSocket.receive(response);
>>
>> //long end_time = getUTCtime();
>> int end_time;
>> std.c.time.time(&end_time);
>>
>> // char [] str_ping = std.string.toString((end_time - start_time));
>> char [] str_ping = std.string.toString((end_time - start_time)/2);
>> pingingSocket.close();
>> printf("ping : " ~ str_ping);
>>
>> As you can see, I tried both std.c.time and std.date functions, but str_ping is always 0. Did I done something wrong ? Should I put the start_time before the resolving getHostByName() ?
>>
>> -- 
>> Abby
> 
> I can't ping www.microsoft.com at all, did you try another address, like google.com?

yes, I tried few addresses (I thought microsoft.com would work also)
IP addresses on my LAN (with getHostByAddr) produce the same probleme.
But you're right, I should check the char[] response to see if the server has anwsered me !

I'm going to use std.perf as Dereck told me (I hope it will work !)

Thanks for your anwsers

--
Abby

Abby (J.P.) wrote:
> Tydr Schnubbis wrote:
>> Abby (J.P.) wrote:
>>> Hello, I'm trying to make a ping utility, I made a working ICMP request (I tested it with Ethereal, I get a reply from the server). But I wonder how much precise are the std.c.time.time() or the std.date.time(), because I always find a ping of 0ms (I know that it must be 1000 ticks per seconds, but I'm not sure, this really is).
>>> Here is my code :
>>>
>>>
>>> char[] host = "www.microsoft.com"
>>> InternetHost targetHost;
>>> targetHost.getHostByName(host);
>>>
>>> InternetAddress targetAddress = new InternetAddress(targetHost.addrList[0], InternetAddress.PORT_ANY);
>>>
>>> Socket pingingSocket = new Socket(AddressFamily.INET, SocketType.RAW, ProtocolType.ICMP);
>>>
>>> //pingingSocket.connect(targetAddress);
>>> //long start_time = getUTCtime();
>>> int start_time;
>>> std.c.time.time(&start_time);
>>>
>>> pingingSocket.sendTo(PING_REQUEST, targetAddress);
>>>
>>> char[] response;
>>> pingingSocket.receive(response);
>>>
>>> //long end_time = getUTCtime();
>>> int end_time;
>>> std.c.time.time(&end_time);
>>>
>>> // char [] str_ping = std.string.toString((end_time - start_time));
>>> char [] str_ping = std.string.toString((end_time - start_time)/2);
>>> pingingSocket.close();
>>> printf("ping : " ~ str_ping);
>>>
>>> As you can see, I tried both std.c.time and std.date functions, but str_ping is always 0. Did I done something wrong ? Should I put the start_time before the resolving getHostByName() ?
>>>
>>> -- 
>>> Abby
>>
>> I can't ping www.microsoft.com at all, did you try another address, like google.com?
> 
> yes, I tried few addresses (I thought microsoft.com would work also)
> IP addresses on my LAN (with getHostByAddr) produce the same probleme.
> But you're right, I should check the char[] response to see if the server has anwsered me !
> 
> I'm going to use std.perf as Dereck told me (I hope it will work !)
> 
> Thanks for your anwsers
> 
> -- 
> Abby
After testing the content of char[] response, it looks like the problem comes from
pingingSocket.receive(response)
The string is always null, and that might also be the cause of my bad timer. But I can see the resquest AND the reply fom the server in ethereal. Is there something special to do, when working with ICMP packets ?
I didn't use
connect(Address)
so my socket is not connected, maybe I should specify that it has to listen for incoming packets ?

Derek Parnell wrote:
> On Wed, 26 Apr 2006 22:09:05 +0200, Abby (J.P.) wrote:
> 
>> Hello, I'm trying to make a ping utility, I made a working ICMP request (I tested it with Ethereal, I get a reply from the server). But I wonder how much precise are the std.c.time.time() or the std.date.time(), because I always find a ping of 0ms (I know that it must be 1000 ticks per seconds, but I'm not sure, this really is).
>> Here is my code :
>>
>> char[] host = "www.microsoft.com"
>> InternetHost targetHost;
>> targetHost.getHostByName(host);
>>
>> InternetAddress targetAddress = new InternetAddress(targetHost.addrList[0], InternetAddress.PORT_ANY);
>>
>> Socket pingingSocket = new Socket(AddressFamily.INET, SocketType.RAW, ProtocolType.ICMP);
>>
>> //pingingSocket.connect(targetAddress);
>> //long start_time = getUTCtime();
>> int start_time;
>> std.c.time.time(&start_time);
>>
>> pingingSocket.sendTo(PING_REQUEST, targetAddress);
>>
>> char[] response;
>> pingingSocket.receive(response);
>>
>> //long end_time = getUTCtime();
>> int end_time;
>> std.c.time.time(&end_time);
>>
>> // char [] str_ping = std.string.toString((end_time - start_time));
>> char [] str_ping = std.string.toString((end_time - start_time)/2);
>> pingingSocket.close();
>> printf("ping : " ~ str_ping);
>>
>> As you can see, I tried both std.c.time and std.date functions, but str_ping is always 0. Did I done something wrong ? Should I put the start_time before the resolving getHostByName() ?
> 
> You might be better to use another undocumented module 'std.perf'.
> 
> For example ...
> 
>    import std.perf;
>    . . .
>    ProcessTimesCounter counter = new ProcessTimesCounter();
>    counter.start();
> 
>    . . .  the stuff you want to time . . .
> 
>    counter.stop();
>    writefln("Duration: %s microseconds", counter.microseconds);
> 
> 

Wouldn't clock() suffice ?

-- 
Bruno Medeiros - CS/E student
http://www.prowiki.org/wiki4d/wiki.cgi?BrunoMedeiros#D