C# Discussion Boards - CodeProject

Member 468084422-Nov-08 4:02

22-Nov-08 4:02

Hello, I want to do packet filter program and I've found some articles about packet sniffing but I've a problem. I'm trying to create raw socket but I always get socket exception with error code 10013 (access denied). I''m using Windows Vista and VS 2008 Express.
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Unspecified);
I try to run this code on VS 2005 and it was fine...no exception. So I don't know where the problem is.Anyway, any suggestions how to do packet filter in C# or how to block ports or internet acess(for specified program or for all)? Thanks.

Re: C# - Raw Socket, Packet filter

Dave Kreskowiak22-Nov-08 4:29

Dave Kreskowiak

22-Nov-08 4:29

Member 4680844 wrote:
I''m using Windows Vista and VS 2008 Express.

Yeah, RAW packets are off-limits to all user accounts. THe only account that can create RAW packets only under an Administrator account. It's been that way since SP2 came out for Windows XP.

Member 4680844 wrote:
I try to run this code on VS 2005 and it was fine...no exception.

Speaking of XP, was this code under 2005 perhaps running under Windows XP or XP SP1?? Under XP and XP SP1, normal user accounts could create RAW packets without any issues. The same code, running under the same account, will not work under XP SP2 and above.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: C# - Raw Socket, Packet filter

Member 468084422-Nov-08 10:01

Member 4680844

22-Nov-08 10:01

Thanks for reply! But from you reply I understand that I can't create RAW socket under regular user account. But this is exactly what I need, because I've a laptop and I don't care about administrators, but when someone other uses the computer(logged as guest or some other user without administration rights) I want to block some internet pages or ports. I know that I can use some programs or firewalls but I want to do it by myself. And about the raw socket, I run the code on same machine(Vista SP1) but once compiled with VS 2008 and then with VS 2005 so I'm really confused about this issue. Anyway any ideas how to do packet filter? Thanks!

Re: C# - Raw Socket, Packet filter

Dave Kreskowiak22-Nov-08 12:25

Dave Kreskowiak

22-Nov-08 12:25

Member 4680844 wrote:
I understand that I can't create RAW socket under regular user account. But this is exactly what I need

It's not going to happen if you run it under Windows. It's that simple. You need to run the code under a full admin account, or it's not going to work.

In order to get VS 2005 to work under Vista, you had to run it as an admin, otherwise it doesn't work very good.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: C# - Raw Socket, Packet filter

Member 468084423-Nov-08 2:26

Member 4680844

23-Nov-08 2:26

Thanks for information! So I tried to do a service for this issue (using system account) and I'm able to read incoming packets. I'm able to get IP address from them and here comes the second issue. How to block/restrict/drop packets from specified IP? Is it possible to do it in C# or I must use C++ and how to accomplish it? Thanks.

Re: C# - Raw Socket, Packet filter

Dave Kreskowiak23-Nov-08 4:51

Dave Kreskowiak

23-Nov-08 4:51

Well, I hate to tell you this, but you're not intercepting anything. You're standing off to the side of the packet stream, watching them fly by.

You can't do what you want without writing a packet driver to stick into the network stack, which you can't do in C#. Well ... not nicely or efficiently anyway.

If you want to see what it takes to do this, look at these[^] open source firewall projects.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

How Enable/Disable Serial Port

mutafa8122-Nov-08 3:46

mutafa81

22-Nov-08 3:46

I can Enable/Disable Serial Port through device manager. But I have to
do it through programming . How can i do that in C#?

Thanks in advance

Moustafa..

C# Winforms GPS Mapping?

wbjohnson22-Nov-08 3:30

wbjohnson

22-Nov-08 3:30

Hi All,

A quick question regarding mapping? I supply a free app to our customers for downloading GPS data from a handheld. What i have is an array of long/lat positions. What i would like to do is plot that information inside the Windows application... I've had a look at Google Maps / Live Maps API and altho they look good, they look like their supposed to be used on a website... not a winform app?

My question to you guys is what would be the propper / ideal technology to use to acheive this?

Many many thanks!
Will

Re: C# Winforms GPS Mapping?

Giorgi Dalakishvili22-Nov-08 4:42

Giorgi Dalakishvili

22-Nov-08 4:42

Try this:
Writing GIS and Mapping Software for .NET[^]

GeoFrameworks[^]

Giorgi Dalakishvili

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Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

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Re: C# Winforms GPS Mapping?

wbjohnson22-Nov-08 7:13

wbjohnson

22-Nov-08 7:13

mmmmm thats a tad expensive!!

is there any free alternative??

Re: C# Winforms GPS Mapping?

Giorgi Dalakishvili10-Dec-08 2:35

Giorgi Dalakishvili

10-Dec-08 2:35

See if this helps: Writing GIS and Mapping Software for .NET[^]

Giorgi Dalakishvili

#region signature
My Articles

Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

My blog
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How to do mouse gesture same program "Stroke It"

ping_jacob22-Nov-08 2:44

ping_jacob

22-Nov-08 2:44

Who can do mouse gesture?
I need to create source code same program "Stroke It" with C#
Please help me...
Please create source code or advice to me...

Thank a lot for everybody.

Re: How to do mouse gesture same program "Stroke It"

Giorgi Dalakishvili22-Nov-08 3:20

Giorgi Dalakishvili

22-Nov-08 3:20

Please don't post the same question twice. You already received reply here: how to mouse gesture without window[^]

Also, don;t expect anyone to write code for you. We can give you hints but we are not going to do your job.

Giorgi Dalakishvili

#region signature
My Articles

Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

My blog
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text processing

kimo code22-Nov-08 0:05

kimo code

22-Nov-08 0:05

hi all
i want to seacrh in a text like "hello code project"
and i want to know how many time the letter 'e' for example comes in this text
and i want to know how many time the letter 'e' for example comes in the first in the word , last in the word, middle in the word

is there a way to do that

please help me

thanks for all

Kareem Elhosseny

Re: text processing

Wendelius22-Nov-08 0:52

Wendelius

22-Nov-08 0:52

You could simply iterate the string. You can use IndexOf method to search for desired characters and Split method to break the sentence into words.

The need to optimize rises from a bad design.

My articles[^]

Re: text processing

kimo code22-Nov-08 1:05

kimo code

22-Nov-08 1:05

plz my friend can u write for me the simple code

here is my code and it works but i dont know how can i know the letter in first or in middle or in last

thanks for ur help my friend

string convertedPw;
int counter = 0;
int uLetters = 0;

//string quran = "Allah Akber";
//CharEnumerator charenum = quran.GetEnumerator();

string mytext= "hi code project";

CharEnumerator charEnum = mytext.GetEnumerator();
while (charEnum.MoveNext())
{
convertedPw = Convert.ToString(pw[counter]);

// here i use the unicode tro define the letter
if (convertedPw == "\u0645")
{
uLetters++;

}
counter++;
}
lblDetails.Text += "ur entry letter comes: " + uLetters.ToString() + "\n";

Kareem Elhosseny

Re: text processing [modified]

Wendelius22-Nov-08 6:56

Wendelius

22-Nov-08 6:56

You could try investigating something like this:

string mytext = "hello code project";
string[] words = mytext.Split(' ');
int wordcount = words.Length;
int numberOfInterestingCharacters;
//
foreach (string word in words) {
   numberOfInterestingCharacters = word.Split('e').Length - 1;
}

The need to optimize rises from a bad design.

My articles[^]

modified on Saturday, November 22, 2008 1:10 PM

Re: text processing

kimo code22-Nov-08 20:10

kimo code

22-Nov-08 20:10

thanks my dear friend i'll try it

Kareem Elhosseny

Re: text processing

#realJSOP22-Nov-08 1:50

#realJSOP

22-Nov-08 1:50

There are three 'e' characters
There is one 'e' in each word.

I really don't see the need to write software to do the counting in that situation. If you did it with .Net 3.5, you'd need to ship your 30k program and the 305mb runtime installer. Let's talk about overkill.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Re: text processing

Christian Graus22-Nov-08 8:53

Christian Graus

22-Nov-08 8:53

I'm sorry that someone did your homework for you. I suggest you spend some time REALLY understanding the code you were given, so you're capable of building on it with the next assignment.

Christian Graus

Driven to the arms of OSX by Vista.

Re: text processing

Wendelius22-Nov-08 11:10

Wendelius

22-Nov-08 11:10

Christian Graus wrote:
I'm sorry that someone did your homework for you

That would be me. Based on his profile I didn't consider this as a homework assignment, but you could be right Sigh | :sigh:

Oh well, still lots of things to learn...

The need to optimize rises from a bad design.

My articles[^]

Re: text processing

kimo code22-Nov-08 19:43

kimo code

22-Nov-08 19:43

execuse me if u have agood word u can say it , if not plz keep your tange in ur mouth

this is not a homework and here is a comunity so any body can learn from me and i also have to learn from otherbody

thanks for ur helpfull replay but plz remember my first words

Kareem Elhosseny

Re: text processing

HosamAly23-Nov-08 5:28

HosamAly

23-Nov-08 5:28

elhosseny wrote:
execuse me if u have agood word u can say it , if not ...

من كان يؤمن بالله واليوم الآخر فليقل خيرا أو ليصمت

Same to you Kareem!
Hostility will get you nowhere. Especially in a community environment.
Besides, Christian said nothing wrong about you!

And even if, I hope you would find these words as nice as I do:

كن كالنخيل عن الأحقاد مرتفعا... تُلْقَى بحجر فتُلْقِي بأطيب الثمر

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Re: text processing

Luc Pattyn22-Nov-08 9:31