Knowledge Sea

/* pseudo header for checksum calculation */
typedef struct pseudoh {
    guint32 src_addr;
    guint32 dest_addr;
    guint8 zero;
    guint8 protocol;
    guint16 length;
} PSEUDO_HDR, * PPSEUDO_HDR;

/* Compute Checksum for TCP packets */
GUINT16 ComputeChecksum(PGUINT16 pseudo_hdr, PGUINT16 ptcp_hdr, PGUINT16 pdata, GUINT32 dataSize) {

guint32 checksum = 0;
guint32 nleft = 0;

nleft = SIZE_PSEUDO_HDR;
while(nleft > 1) {
    /* This is the inner loop */
    checksum = checksum + *(pseudo_hdr++);
    nleft = nleft – sizeof(guint16);
}

nleft = SIZE_TCP_HEADER;
while(nleft > 1) {
    /* This is the inner loop */
    checksum = checksum + *(ptcp_hdr++);
    nleft = nleft – sizeof(guint16);
}

nleft = dataSize;
while(nleft > 1) {
    /* This is the inner loop */
    checksum = checksum + *(pdata++);
    nleft = nleft – sizeof(guint16);
}
if(nleft)
    checksum = checksum + *((pguint8)pdata);
/* Fold 32-bit sum to 16 bits */
checksum = (0xFFFF&(checksum >> 16)) + (checksum & 0xffff);
checksum = (checksum & 0xffff) + (0xFFFF&(checksum >> 16));
return (guint16)(~checksum);
}

Filed under: C/C++, Java, Linux, Network, WDF, WDK | Leave a Comment
Tags: Checksum TCP

How to control system reboot after crash?

08Jun09

This setting will enables for you to control automatic rebooting of the system after the crash. After the crash, you must be able to check the reason of the crash and for that, the system should not reboot. Therefore, it is very necessary to control the automatic rebooting of the system.

Path: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\CrashControl\]
Location: Local Machine
Value Name: AutoReboot
Data Type: DWORD (DWORD Value)
Enabled Value: 0
Disabled Value: 1
Action Type: Modified

Filed under: C/C++, DDK, Network, WDF, WDK, Windows, fun & enjoy | Leave a Comment
Tags: reboot WDK DDK system crash

Helpful forums for Microsoft Device Driver

05Jun09

While working on Microsoft Device Driver domain, I found following most active and helpful forums,

1) OSR-Online: http://www.osronline.com
You can configure OSR-Online forum on email client and given client will be helpful for you.
http://www.osronline.com/page.cfm?name=NewsReaderInfo

2) Microsoft NNTP Server: msnews.microsoft.com
Following groups are available on Microsoft forum,
1. microsoft.public.development.device.drivers
2. microsoft.public.windowsxp.device_driver.dev
You can configure Microsoft NNTP server on email-client using above “OSR-Online Forum Configuration” process but you will use “msnews.microsoft.com” for Microsoft NNTP Server address. You will not need authentication cardinality to connect Microsoft NNTP Server.

NOTE: Some time few consultants will discourage you to use forums for help and will ask you to get consultancy from them. Please do not underestimate yourself and try google and other forums for help because “Everything possible but nothing is impossible”.

Filed under: C/C++, DDK, Network, News, WDF, WDK, Windows | Leave a Comment
Tags: NNTP

How to solve Command line error D8004?

26May09

I faced given compilation error after convert “Komodia Project” from “VC6” to “VS2K5”.

Error 1 Command line error D8004 : ‘/D’ requires an argument cl

Solution:

Remove “/D” from “Additional options” (Example image is given below).
Path of “Additional options” is “Project Properties” >> “Configuration Properties” >> “C/C++” >> “Command Line”

Komodia_Project_Error by you.

Filed under: C/C++, Network, Windows | Leave a Comment
Tags: Network LSP Komodia Winsock2

How to build DDK source using vs2k5?

21May09

Please visit: http://aimslife.com/blog/?p=11

Filed under: C/C++, DDK, WDF, WDK, Windows | Leave a Comment
Tags: WDK WDF C/C++ DDK Windows

Few common POSIX Regular Expression

05May09

Please visit: http://aimslife.com/blog/?p=9

Filed under: C#, C/C++, Java, Linux | Leave a Comment
Tags: http://aimslife.com/blog/?p=9

How to install Subversion on Eclipse Ganymede?

15Apr09

Please visit: http://aimslife.com/blog/?p=10

Filed under: C/C++, Linux, Windows | 1 Comment

How to run Synergy Client on Linux?

10Apr09

# synergyc –f –d ERROR –daemon <server_ip_address>

I recommend to add this command on “/etc/rc.local” file for automatic start synergy client at login time.

[Synergy]

Filed under: Linux | Leave a Comment

How to UnInstall/Repair MSN 2009?

26Mar09

For uninstall/repair Windows Live Messenger 2009, you have to use "Windows Live Essentials" from “Add/Remove Programs”. Image will help you a lot.

Windows Live Messenger by you.

Filed under: Windows | 1 Comment
Tags: MSN Uninstall Repair Live 2009

Windows Live Writer – Test Blog

24Mar09

This is my first blog testing with "Windows Live Writer". Download information is given blow,
[Download link]

It has cool interface and good option for Blog Writing…

Filed under: Uncategorized | 1 Comment

How to extract files from tar.gz file?

24Feb09

You can use given command on prompt.
# tar -zxvf <name>.tar.gz

Filed under: Linux | Leave a Comment

How to remove bulk of “.svn” folder on Linux?

09Feb09

Command:

# find -name .svn -exec rm -rf {} \;

# find -name “\.svn” -exec rm -rf {} \;

Filed under: Linux | Leave a Comment

Pakistan Zindabad…

07Feb09

“Do your duty and have faith in God. There is no power on earth that can undo Pakistan. It has come to stay InshAllah.”
(Quid-e-Azam)

Filed under: Uncategorized | Leave a Comment

WebServer in Java

05Feb09

package com.Web;

import java.io.*;
import java.net.*;

public class WebServer extends Thread {
    String filePath;
    OutputStream out;
    Socket sock;
    public WebServer(String pathString, OutputStream outStream, Socket s) {
        filePath = pathString;
        sock = s;
        out = outStream;
    }
    public void run() {
        PrintWriter writer = new PrintWriter(out, true);
        try {
            filePath = (new File(filePath)).getAbsolutePath();
            InputStream in = new FileInputStream(filePath);
            int val;
            writer.println(“HTTP/1.0 200 OK”);
            writer.println(“”);
            System.out.println(“<Client> Uploading : ” + filePath);
            while ((val = in.read()) != -1) {
                out.write(val);
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            writer.println(“<html><body><b>” + e.getMessage()
                    + “</b></body></html>”);
            System.out.println(“<Client> ” + e.getMessage());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            writer.println(“<html><body><b>” + e.getMessage()
                    + “</b></body></html>”);
            System.out.println(“<Client> ” + e.getMessage());
        }
        writer.println(“”);
        System.out.println(“<Client> Uploading : Complete”);
        System.out.println(“<Client> “);
        try {
            sock.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            System.out.println(“ERROR: ” + e.getMessage());
        }
    }

    public static void main(String[] args) throws Exception {
        ServerSocket server = new ServerSocket(80);
        while (true) {
            Socket s = server.accept();
            OutputStream out = s.getOutputStream();
            InputStream in = s.getInputStream();
            InputStreamReader inReader = new InputStreamReader(in);
            BufferedReader reader = new BufferedReader(inReader);
            String line = reader.readLine();
            while (line != null && !”".equals(line)) {
                System.out.println(“<Client> ” + line);
                String splitString[] = line.split(” “);
                if (splitString[0].equals(“GET”)) {
                    WebServer webServer = new WebServer(“.” + splitString[1],
                            out, s);
                    webServer.start();
                }
                line = reader.readLine();
            }
            System.out.println(“<Client> “);
        }
    }
}

It is your duty to compile and make it working condition… use JDK1.6 and eclipse…

Filed under: Java | Leave a Comment

February 2010

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More Photos

Compute Checksum Function

Specification of Pakistan Flag

How make debugging levels and enable/disable in C language?

How to convert integer value into character string?

14-Aug Pakistan Zindabad!

اندیشہ زوال

Linux Kernel Driver with NetFilter

How we can use malloc, free, new and delete functionality in DDK?

Linux command to operate network connections

How to generate new copy of NDIS_PACKET?

How to compute checksum for TCP packets?

How to control system reboot after crash?

Helpful forums for Microsoft Device Driver

How to solve Command line error D8004?

How to build DDK source using vs2k5?

Few common POSIX Regular Expression

How to install Subversion on Eclipse Ganymede?

How to run Synergy Client on Linux?

How to UnInstall/Repair MSN 2009?

Windows Live Writer – Test Blog

How to extract files from tar.gz file?

How to remove bulk of “.svn” folder on Linux?

Pakistan Zindabad…

WebServer in Java

Categories

Computer Science

Pakistan

Pakistan Media

Meta

AimsLife Photos

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