Solved

Named Pipes in Windows Service ?!

Posted on 2007-11-14
5
1,186 Views
Last Modified: 2013-12-04
Can anybody show me how to do a named pipe server / client in a windows service ? i have a pipeserver in an app running on XPSP2 and Win2K / 2003 that works fine as an application, but as soon as i encapsulate it in a service the client dont seem to be able to write to it anymore ??

Really hope someone can help, its urgent. Thanks
0
Comment
Question by:thordk
  • 3
  • 2
5 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 500 total points
ID: 20286142
How are you setting the security attributes of the pipe? Try

SECURITY_DESCRIPTOR         sd;
PSID psidWorldSid; // a SID representing "everyone"
SID_IDENTIFIER_AUTHORITY siaWorldSidAuthority = SECURITY_WORLD_SID_AUTHORITY;

psidWorldSid = (PSID) LocalAlloc(LPTR, GetSidLengthRequired(1));
InitializeSid(psidWorldSid, &siaWorldSidAuthority, 1);
*(GetSidSubAuthority(psidWorldSid, 0)) = SECURITY_WORLD_RID;

if  (   !InitializeSecurityDescriptor   (   &sd,    SECURITY_DESCRIPTOR_REVISION)
    )
    {
        //  error
    }

// here I set the _group_ to 'world', but you could also use
// 'owner'...
if  (   !SetSecurityDescriptorGroup (   &sd,    psidWorldSid,   TRUE)
    )
    {
        //  error
    }

SECURITY_ATTRIBUTES sa;

sa.nLength                        =      sizeof      (      SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor      =      &sd;
sa.bInheritHandle            =      FALSE;
0
 

Author Comment

by:thordk
ID: 20326911
Hi jkr !

Thanks for answering - i havent used the SD at all in my applications, but then i read somewhere that it was important if they were running as a service (can you confirm that ?). What i tried to put into as a service was:

SECURITY_ATTRIBUTES sa;
SECURITY_DESCRIPTOR sd;

InitializeSecurityDescriptor(&sd,SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(&sd,TRUE,NULL,FALSE);
SetSecurityDescriptorGroup(&sd,NULL, FALSE );
SetSecurityDescriptorSacl(&sd, FALSE, NULL, FALSE );

sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = &sd;
sa.bInheritHandle = TRUE;
PipeHandle = CreateNamedPipe(PipeUNCname, PIPE_ACCESS_INBOUND, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE, PIPE_UNLIMITED_INSTANCES, 0, 0, PIPE_BUFSIZE, &sa ));

- But do i have to something both on serverside and clientside ? some of the clients will run as services too.
0
 
LVL 86

Expert Comment

by:jkr
ID: 20329174
Yes, you should try that for both ends of the pipe.
0
 

Author Comment

by:thordk
ID: 20329895
Okay just to get it right; ill use the exact same SD in both end right ? i will try to make a test and return back to you, thanks alot.
0
 

Author Comment

by:thordk
ID: 20345880
That appeared to have solved my problem ! thanks alot.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Event ID 10010 3 60
Windows Process running 3 54
What the difference between blend and Visual Studio 3 99
How to LOAD up a .NET Framework website with data? 2 56
This article describes a technique for converting RTF (Rich Text Format) data to HTML and provides C++ source that does it all in just a few lines of code. Although RTF is coming to be considered a "legacy" format, it is still in common use... po…
zlib is a free compression library (a DLL) on which the popular gzip utility is built.  In this article, we'll see how to use the zlib functions to compress and decompress data in memory; that is, without needing to use a temporary file.  We'll be c…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question