increasing sequence number on raw socket - C / C++ / MFC Discussion Boards

Why wouldn't MFC exe ole server unload?

CherezZaboro6-Jun-03 6:31

CherezZaboro

6-Jun-03 6:31

OnFinalRelease gets called yet the exe itself is left running. Confused | :confused:

vbs code that calls it looks like this:

<br />
dim o<br />
set o = createobject("some.progid")<br />
set o = nothing<br />

Re: Why wouldn't MFC exe ole server unload?

Ryan Binns7-Jun-03 21:11

Ryan Binns

7-Jun-03 21:11

It's normal for Windows. Windows will keep the exe running for a period of time, just in case another object is created - to help performance. There is a timeout period where the exe gets unloaded if no object is created in this time, but I forget how long it is.

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

Changing text color in static text control

AJarrett6-Jun-03 5:33

AJarrett

6-Jun-03 5:33

I have a customized Find Dialog (based on CFindReplaceDialog) to which I've added amongst other things a static text box for displaying results of the search in the CListCntl to which the dialog is attached. No problem. Then I thought it would be nice visually to say display "Find failed" in red, success in green. For something that seems like it should be dirt simple, I've plowed through more MSDN doc and CodeProject seemingly related items than I can believe. I must be missing something. Recommendations? Thanks.

Re: Changing text color in static text control

valikac6-Jun-03 6:10

valikac

6-Jun-03 6:10

One solution is to add a handler for WM_CTLCOLOR. Update color of the static control inside the handler.

Kuphryn

Re: Changing text color in static text control

AJarrett6-Jun-03 7:24

AJarrett

6-Jun-03 7:24

Yes. That was one avenue that led to a feeling of stupidity. Put a handler in the Find Dialog and SendMesssage to its window. I have yet to find a description of the proper setup of WM_CTLCOLOR wparam, lparam. Do you know a good source for such info? Thanks.

Alex.

Re: Changing text color in static text control

John R. Shaw6-Jun-03 9:31

John R. Shaw

6-Jun-03 9:31

Look up WM_CTLCOLORSTATIC in the MSDN Library.

Trust in the code Luke. Yea right!

Re: Changing text color in static text control

AJarrett6-Jun-03 10:49

AJarrett

6-Jun-03 10:49

Silly me, searching on just WM_CTLCOLOR. Blush | :O

I see COLORSTATIC is restricted to a thread, but I can work around that.

Many thanks, John. Between you and kuphryn I feel the Force may be with me again.

increasing sequence number on raw socket

Kuniva6-Jun-03 5:16

Kuniva

6-Jun-03 5:16

I have a raw socket and i construct its IP and TCP header myself. The TCP header is like the following:

#pragma pack(1)
struct tcpheader {
	unsigned short int th_sport;
	unsigned short int th_dport;
	unsigned int th_seq;
	unsigned int th_ack;
	unsigned char th_x2:4, th_off:4;
	unsigned char th_flags;
	unsigned short int th_win;
	unsigned short int th_sum;
	unsigned short int th_urp;
}; /* total tcp header length: 20 bytes (=160 bits) */

Now when i want to send a packet i fill in all the values and everything works great. I use a packet capturer to check if the values i filled in were actually the values transmitted. Now the problem is that i send packets in a while loop and everytime i increase the sequence number by one like this:

while (!kbhit())
{
    // Send The Packet
    if (sendto(s, datagram, 40, 0, (SOCKADDR *)&sin, sizeof(sin)) == SOCKET_ERROR)
    {
        printf("sendto() failed: %d\n", WSAGetLastError());
        return -1;
    }
    printf(".");
    Sleep(1000);
    tcph->th_seq++;
}

When i check the packets in my capture program i see that the first packet is in order if i set tcph->th_seq to 0. But if i use another value like 7000000 i see much larger number in my capture program, and also if the code increments from 0, the sequence number doesn't rise by 1 every packet but with A LOT more (the second packets sequence number is 16777216!). Could anyone explain why its not just incrementing by 1 each time, and how can i set the sequence number to the value i want?

Many thanks in advance

Kuniva
--------------------------------------------

Re: increasing sequence number on raw socket

Mike Nordell6-Jun-03 8:42

Mike Nordell

6-Jun-03 8:42

Kuniva wrote:
if the code increments from 0, the sequence number doesn't rise by 1 every packet but with A LOT more (the second packets sequence number is 16777216!).

Boy are you gonna feel stupid now. ;->

Have you checked what that number is in hex? Does 0x01000000 ring any bells? Network byte order and host byte order is a mismatch on IA32. Now start using htonl and ntohl.

Re: increasing sequence number on raw socket

Kuniva6-Jun-03 11:19

Kuniva

6-Jun-03 11:19

lol! I don't feel stupid actually, i figured it would be something like that hehe Smile | :)

Thanks a lot for the help Big Grin | :-D

Kuniva
--------------------------------------------

Zlib for Dos

WAQAS AHMED6-Jun-03 4:15

WAQAS AHMED

6-Jun-03 4:15

I have compiled ZLib source code in turbo c 3.0?
I want to use it on MSDOS for compressing and uncompressing the files.
My question is that
Is it possible to run ZLib code on MSDOS.

v
f
dssg
dsfg
dfsgsd
f

microsoft dialog with tabctrl wanted

Tibor Blazko6-Jun-03 3:59

Tibor Blazko

6-Jun-03 3:59

does anybody know any ms dialog with tabctrl?
(the best with more ones to be sure it is dialog and not property sheet)
f.e. i found word97/options but fantastic spy++ shows it like control-less (except one button and few scrollbars all own drawing?)
t!

(main problem: http://www.codeproject.com/script/comments/forums.asp?msg=516785&forumid=1647#xx516785xx[^])

how to use the srand function???

siong6-Jun-03 3:06

siong

6-Jun-03 3:06

I want to randomly generate a number for the certain range of number??? How?? Help me Confused | :confused:

Re: how to use the srand function???

David Chamberlain6-Jun-03 3:29

David Chamberlain

6-Jun-03 3:29

Most random number generators will provide a number between 0 and 1. If you want to produce numbers between 15 and 20, for example, the difference is 5 (20 - 15), and the offset is 15. So, generally, if you take rand()*5 + 15 you'll get numbers between 15 and 20.

rand() * range + offset

Dave

"You can say that again." -- Dept. of Redundancy Dept.

Re: how to use the srand function???

Anonymous6-Jun-03 4:00

Anonymous

6-Jun-03 4:00

better in this case will be

rand()%(range+1) + offset;

use srand to initial your randomgenerator

Heiko

Convert CString to char *

Vassili6-Jun-03 3:01

Vassili

6-Jun-03 3:01

How can I convert a CString to a char * variable?

CString str;
char *szBuffer;

//code
.
.
.
szBuffer = (const char *) str; //why does this not work, and what do I have to do?

Re: Convert CString to char *

Anonymous6-Jun-03 3:32

Anonymous

6-Jun-03 3:32

Use the getBuffer function.

Re: Convert CString to char *

Rage6-Jun-03 3:41

Rage

6-Jun-03 3:41

CString str;
TCHAR *szBuffer=(LPTSTR)(LPCTSTR)str;

~RaGE();

Re: Convert CString to char *

jhwurmbach6-Jun-03 4:35

jhwurmbach

6-Jun-03 4:35

Rage wrote:
TCHAR *szBuffer=(LPTSTR)(LPCTSTR)str;

This only works is you do not write into the CString.
If you really need to write into it, you have to use GetBuffer()/ReleaseBuffer().

My opinions may have changed, but not the fact that I am right.

Re: Convert CString to char *

Rage6-Jun-03 5:21

Rage

6-Jun-03 5:21

Yep, I know, but in his initial example he tried to typecaste in a const char *, so ...

~RaGE();

Re: Convert CString to char *

jhwurmbach6-Jun-03 5:27

jhwurmbach

6-Jun-03 5:27

Yeah, but that type of stuff IS really dangerous.
It works once you understood when to use it (at a InsertItem() with a LVITEM / TVITEM.pszText for example).
But IMHO it is nothing to tell beginners. Shhhh! Big Grin | :-D

My opinions may have changed, but not the fact that I am right.

Re: Convert CString to char *

Michael Dunn6-Jun-03 9:08

Michael Dunn

6-Jun-03 9:08

NO NO NO.

Please don't encourage people to throw casts in without understanding the initial cause of their problem. The GetBuffer() method exists for precisely this case.

--Mike--
Latest blog entry: *drool* (Alyson) [May 10]
Ericahist | Homepage | RightClick-Encrypt | 1ClickPicGrabber
"You have Erica on the brain" - Jon Sagara to me

Where to find common toolbar xp icons?

Nicolas Bonamy6-Jun-03 2:37

Nicolas Bonamy

6-Jun-03 2:37

Hello I am looking for a source to get the common toolbar xp icons as described here[^]. I am really looking for the source files because I want to use them with alpha blending so I really need the transparency channel and it won't work if I just screencap and crop. I have been looking for them in systems DLL without luck.

Does anyone know?

Regards,
Nicolas

?????CListCtrl????

Stefcos6-Jun-03 1:59

Stefcos

6-Jun-03 1:59

hey all,
i'm a beginner and have one problem.
I want to program a CListCtrl(report-view) object with the resource-editor within a non-modal dialog. Always when I declare a variable with the assistent for the object(CListCtrl variable), i get a DEBUG ASSERTION FAILED during carring out my application. Why?????
The same Project within a modal dialog works fine.
Can everybody help me???
thanks

Stefcos

Re: ?????CListCtrl????

David Crow6-Jun-03 2:27

David Crow

6-Jun-03 2:27

What is the file and line # of the fired assertion?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.