Communications Between Program and Controlling Program
Hi All, I'm looking for feedback on the best way to code communications between Programs. The architecture we are looking at is similar to Symantec AV or others - a control program sends messages to the worker program on a different machine. The worker program communicates back when complete (with a result), and gets another chunk of work. The messages will be small. What will be communicated is as follows: Control Program: Control Program Start Control Program Stop (Worker queues messages) Control Program sends a piece of work when requested Worker Program: Worker Program Start Worker Program Stop Worker Program Completed Job Both the Control and Worker will be System Services on Win 2k & 2k3 Server, or 2000 & XP Workstations. Any feedback would be appreciated, Jeff
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Hi All, I should have speciifed the kind of feedback: Named Pipes \ Mailslot versus a socket, etc. Jeff
Named pipes if you are working within a single Windows domain (or domains with mutual trust arrangements) and want security. Sockets if you need to work across multiple domains. At that point, concepts like SSL and other encryption layers have to be dealt with or any 12-year-old (of any age) with a network connection can attack you. Mailslots are not "reliable" communications mechanisms. Also, no matter what your protocol is, make sure that you can handle multiple startup messages, multiple shutdown messages, etc. (I built such a pair of programs, and debugging them was a nightmare until I built a robust protocol so that either could be shut down and restarted and the protocol would resynchronize) joe On 30 May 2006 13:55:35 -0700, "Jeff" <noloader@gmail.com> wrote: >Hi All, > >I should have speciifed the kind of feedback: > >Named Pipes \ Mailslot versus a socket, etc. > >Jeff Joseph M. Newcomer [MVP] email: newcomer@flounder.com Web: http://www.flounder.com MVP Tips: http://www.flounder.com/mvp_tips.htm
newcomer"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message news:701s72teu0jfauq49a5gqpv18fsmn8shgc@4ax.com... > Named pipes if you are working within a single Windows domain (or domains > with mutual > trust arrangements) and want security. > > Sockets if you need to work across multiple domains. At that point, > concepts like SSL and > other encryption layers have to be dealt with or any 12-year-old (of any > age) with a > network connection can attack you. (snip) I'm curious about this previous statement. I work with an application that uses sockets, but we don't currently support SSL. The application is designed to run on an intranet (meaning, no external access to the PC running our socket-app). Is this a known security risk? Most clients have a router between their internal network and the internet, and they are using non-routable-IP's (192.168.*.*). Thanks in advance for any advice. DanB
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Dan
5/31/2006 9:57:48 PM
The 12-year-olds do not necessarily exist outside the intranet. It depends on what you are trying to protect. I have some wonderful internal attacks that can be done by unhappy employees, which I describe in my security course. It depends on whether or not you trust the folks on the network. The 192.168.* addresses are not forwarded by routers, but in large corporations, the ability to slip into the corporate network and work from within, even for outsiders, means that you need a lot more trust than major corporations are willing to grant. SSL at least gives you protection from packet sniffers and unhappy internal people. joe On Wed, 31 May 2006 15:57:48 -0600, "Dan Baker" <dbmail> wrote: >"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message >news:701s72teu0jfauq49a5gqpv18fsmn8shgc@4ax.com... >> Named pipes if you are working within a single Windows domain (or domains >> with mutual >> trust arrangements) and want security. >> >> Sockets if you need to work across multiple domains. At that point, >> concepts like SSL and >> other encryption layers have to be dealt with or any 12-year-old (of any >> age) with a >> network connection can attack you. >(snip) > >I'm curious about this previous statement. I work with an application that >uses sockets, but we don't currently support SSL. The application is >designed to run on an intranet (meaning, no external access to the PC >running our socket-app). Is this a known security risk? Most clients have >a router between their internal network and the internet, and they are using >non-routable-IP's (192.168.*.*). > >Thanks in advance for any advice. >DanB > Joseph M. Newcomer [MVP] email: newcomer@flounder.com Web: http://www.flounder.com MVP Tips: http://www.flounder.com/mvp_tips.htm
"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message news:7vls72lgsftkn3ndkgcrh7fqukma9rvbnf@4ax.com... > The 12-year-olds do not necessarily exist outside the intranet. It > depends on what you > are trying to protect. I have some wonderful internal attacks that can be > done by unhappy > employees, which I describe in my security course. > > It depends on whether or not you trust the folks on the network. The > 192.168.* addresses > are not forwarded by routers, but in large corporations, the ability to > slip into the > corporate network and work from within, even for outsiders, means that you > need a lot more > trust than major corporations are willing to grant. SSL at least gives > you protection > from packet sniffers and unhappy internal people. > joe Excellent response. All good news. Thanks DanB
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Dan
6/1/2006 5:18:50 PM
Hi Joe, Thanks for the response. > Named pipes if you are working within a single Windows domain (or domains with mutual > trust arrangements) and want security. It is a Windows 2003 domain. I was also thinking about an AD partition. That is, the controlling program places information in the partition, and the worker grabs it up and does work. If two workers perform the same work - it is OK (great burden lifted :). Do you have any experience with the 2003 partitions? I was intorduced to it in a Architecture class taught by Microsoft, but not from a programmic standpoint. Jeff Joseph M. Newcomer wrote: > Named pipes if you are working within a single Windows domain (or domains with mutual > trust arrangements) and want security. > > Sockets if you need to work across multiple domains. At that point, concepts like SSL and > other encryption layers have to be dealt with or any 12-year-old (of any age) with a > network connection can attack you. > > Mailslots are not "reliable" communications mechanisms. > > ... > joe > ... > Joseph M. Newcomer [MVP] > email: newcomer@flounder.com > Web: http://www.flounder.com > MVP Tips: http://www.flounder.com/mvp_tips.htm
In case anyone was wondering about the data partitions, here's a link: http://www.microsoft.com/windowsserver2003/techinfo/overview/adam.mspx Jeff wrote: > Hi Joe, > > Thanks for the response. > > > Named pipes if you are working within a single Windows domain (or domains with mutual > > trust arrangements) and want security. > It is a Windows 2003 domain. > > I was also thinking about an AD partition. That is, the controlling > program places information in the partition, and the worker grabs it up > and does work. If two workers perform the same work - it is OK (great > burden lifted :). > > Do you have any experience with the 2003 partitions? I was intorduced > to it in a Architecture class taught by Microsoft, but not from a > programmic standpoint. > > Jeff > > Joseph M. Newcomer wrote: > > Named pipes if you are working within a single Windows domain (or domains with mutual > > trust arrangements) and want security. > > > > Sockets if you need to work across multiple domains. At that point, concepts like SSL and > > other encryption layers have to be dealt with or any 12-year-old (of any age) with a > > network connection can attack you. > > > > Mailslots are not "reliable" communications mechanisms. > > > > ... > > joe > > ... > > Joseph M. Newcomer [MVP] > > email: newcomer@flounder.com > > Web: http://www.flounder.com > > MVP Tips: http://www.flounder.com/mvp_tips.htm
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Is it possible to have a single method that handles all change notifications to text boxes on a dialog? I want to enable the OK button if any text box changes. The application I am porting to MFC has the following code in its dialog handling procedure: switch ( uMessage ) { case WM_COMMAND: // Enable the OK button only when changes are made if ( GET_WM_COMMAND_CMD( wparam, lparam ) == EN_CHANGE ) { Button_Enable( GetDlgItem( hdlg, IDOK ), TRUE ); break; } switch ( GET_WM_COMMAND_ID( wparam, lparam ) ) { // handle other commands } break; .... It seems that in ...
Hyperlink in my Dialog control
I want my text in a dialog control to behave like a hyperlink in a web page. Is it possible and how(VC 6.0) Thanks I. Lesher http://www.codeproject.com/miscctrl/hyperlink.asp Here are some examples: http://www.codeguru.com/staticctrl/HyperlinkStatic.html http://www.codeproject.com/staticctrl/cmyhyperlink.asp http://msdn.microsoft.com/msdnmag/issues/01/01/c/default.aspx (look for CStaticLink) -- Ajay Kalra [MVP - VC++] ajaykalra@yahoo.com "Lesher" <Lesher@triplebit.com> wrote in message news:uRDIoju#DHA.808@TK2MSFTNGP12.phx.gbl... | I want my text in a dialog contr...
ActiveX
I get the message "abnormal program termination" once it try to use a method implemented as protected. The method was build using the Wizard - Automation - Add Method. Void return type, and short as argument (or OLE_COLOR), I did not use any pointer as argument. So what should it be? thank you Mathieu ...
Disable write-cache on SCSI controller?
Hello. My Exchange 2003 Server is getting corrupted every few weeks with -1018 errors. I have updated the SCSI controller's firmware and am going to upgrade the system BIOS tomorrow. The machine is a HP Proliant DL380 G4 with a P600 SCSI Array controller card and has SAS drives installed. I found this quote below on Vertias' web site on how to configure am Exchange 2003 Server. Disable write-cache on the SCSI controller. Windows does not use buffers, so when Exchange (or other applications) receives a write complete notice from Windows, the write-to-disk has been completed. If ...
Excel files/data to C program ?
Can anyone guide me on how am i suppose to write in my C program t access datas in rows/columns of data in an excel file. have to do some analysis with these data using C/C++ thank -- Message posted from http://www.ExcelForum.com Use ADO. -- tirades <<tirades.11db8f@excelforum-nospam.com>> wrote in message news:<tirades.11db8f@excelforum-nospam.com>... > Can anyone guide me on how am i suppose to write in my C program to > access datas in rows/columns of data in an excel file. > have to do some analysis with these data using C/C++ > > thanks > > ...
Excel Add-in: Setup Wizard or Installation program needed
Hello, I have created an add-in that I want to be able to distribute as shrink-wrap solution. The problem is that I can't find a way to create an install progra that will identify the user's O/S, Excell version, and the Add-in pat to place the module in. I had thought I could use the "setup wizard" but I have Office 200 Professional (not the developer edition) and so it appears that th wizard is not in my version... I also thought that I could use the "Package & Deployment wizard" fro VB studio 6, but it only looks for "Visual Basic Projects (*.vba) wh...
control to change sheet
I want to be able to change a sheet by choosing an option from a drop-down list, just like a jump-menu in web design. I have a collection of macros that work as expected, but how do I attach the combo-box to the macro? any ideas?? MrD Assuming combobox from the control toolbox toolbar in the click event, call your macro. -- Regards, Tom Ogilvy EssieP <mdd-delete@mdalgleish.clara.co.uk> wrote in message news:e8HWGQpwDHA.2000@TK2MSFTNGP11.phx.gbl... > I want to be able to change a sheet by choosing an option from a drop-down > list, just like a jump-menu in web design. I hav...
insert control to parent at reverse order.
Hello. I see that, when insert controls to the same parent on the following way : control1.parent = commonParent control2.parent = commonParent commonParent.controls(0) ' this is coltrol1 commonParent.controls(1) ' this is control2 But, when I am doing so on design time, the order is reversed (and that what's I need). commonParent.controls(0) ' this is coltrol2 commonParent.controls(1) ' this is control1 How can I insert into the parent, the controls with reverse-order? Thanks :) Design time and runtime is not different in VB versions newer th...
Change the anchor property of a control.
Hello. How can I capture the event, when changing the anchor property of the control ? I.e : myPanel.anchor = AnchorStyles.Left & AnchorStyles.Bottom .... How can I know, when the Anchor property is changed (which event?) ? Thanks :) Am 12.06.2010 23:46, schrieb Mr. X.: > Hello. > How can I capture the event, when changing the anchor property of the > control ? > > I.e : > myPanel.anchor = AnchorStyles.Left & AnchorStyles.Bottom > .... > How can I know, when the Anchor property is changed (which event?) ? Like I said, about once o...
LParam in a list control
I am trying to create objects and store their pointers in the LParam of my list control. This all works, but clearly I need to tidy up these objects when an item is deleted from the list. I have written a DeleteAllItems method which loops round all the items and clears the list and deletes the objects so all should be well. Problem is that I get memory leaks when the app closes, so I am obviously not deleting the objects. My test populates the list with 5 objects and deletes them, then re-populates with 5 objects again. I call my DeleteAllItems method once myself, then once automaticall...
Transparent Controls
Hello, I was wondering how I can make transparent controls in Visual C++ .NET 2003. The application type I am using is MFC, and I am using a dialog based application design. I looked at the samples in codeguru and codeproject however when I tried the examples posted the transparency effect would go away after a while. Does anyone know how to make a control transparent in Visual C++? Sincerely, James Simpson Straightway Technologies http://www.straightwaytech.com James Simpson wrote: > Hello, > I was wondering how I can make transparent controls in Visual C++ .NET 2003. > The a...