[Winpcap-users] pcap_findalldevs_ex hangs inside java process
Gianluca Varenni
gianluca.varenni at cacetech.com
Wed Sep 23 09:37:02 PDT 2009
Before you start debugging, I already know quite precisely where it hangs. It hangs in packet.dll in some COM-related calls related to Wan Adapters. That's why I was asking if XPCOM uses COM on windows. There is not a fix to these issues (the problem is inside some microsoft component), but rather workarounds to the application using WinPcap...
That's why I was asking for an application to reproduce the issue
GV
----- Original Message -----
From: E, Manivannan
To: winpcap-users at winpcap.org
Sent: Wednesday, September 23, 2009 5:19 AM
Subject: Re: [Winpcap-users] pcap_findalldevs_ex hangs inside java process
XPCOM doesn't use COM internally. Anyway creating a test application to reproduce the hang is getting complicated. So I plan to debug the issue myself; currently I am having some issues in building the Winpcap dlls in VC6 once that done you can expect some result.
Regards,
Mani
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From: winpcap-users-bounces at winpcap.org [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of Gianluca Varenni
Sent: Tuesday, September 22, 2009 9:00 PM
To: winpcap-users at winpcap.org
Subject: Re: [Winpcap-users] pcap_findalldevs_ex hangs inside java process
I'm not familiar with XPCOM. Does it use COM internally under Windows?
Have a nice day
GV
----- Original Message -----
From: E, Manivannan
To: winpcap-users at winpcap.org
Sent: Tuesday, September 22, 2009 7:16 AM
Subject: Re: [Winpcap-users] pcap_findalldevs_ex hangs inside java process
Guys,
I tried to create a test application to reproduce the issue. I used JNI and called my test bench which intern opened the dll & called pcap_findalldevs_ex. In the test application pcap_findalldevs_ex didn't hang and everything worked fine. Later I spoke to my colleagues and figured out that we use XPCOM to interface between Java API & C++ debugger. I haven't created a test application using XPCOM yet & would take some time for me.
Meanwhile does anyone aware of pcap_findalldevs_ex hang issue while using XPCOM on command line?
Regards,
Mani
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From: winpcap-users-bounces at winpcap.org [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of Mark Bednarczyk
Sent: Monday, September 21, 2009 10:21 PM
To: winpcap-users at winpcap.org
Subject: Re: [Winpcap-users] pcap_findalldevs_ex hangs inside java process
Mani,
we use pcap_findalldevs_ex in our java project and we have no problem within java VM. There are thousands of users using our project and it has never come up as a problem. Our internal tests with findalldev_ex work as well. Its an open source project, so you are welcome to take a look at the source and how we use it.
http://jnetpcap.com
here is the link to the relavent C source file that implements the findalldevs_ex as a java wrapper. The findalldevs_ex code starts around line 750.
Cheers,
mark...
> -----Original Message-----
> From: winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of E, Manivannan
> Sent: Thursday, September 17, 2009 6:17 AM
> To: winpcap-users at winpcap.org
> Subject: Re: [Winpcap-users] pcap_findalldevs_ex hangs inside
> java process
>
> I don't see the "pcap_findalldevs_ex" hang issue on Vista and
> it work properly. We want this application to run on XP as
> our machines are predominantly XP.
>
>
>
> Regards,
>
> Mani
>
>
>
> ________________________________
>
> From: winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of
> Gianluca Varenni
> Sent: Wednesday, September 16, 2009 3:06 AM
> To: winpcap-users at winpcap.org
> Subject: Re: [Winpcap-users] pcap_findalldevs_ex hangs inside
> java process
>
>
>
> Does the same issue happen on Vista?
>
>
>
> Have a nice day
>
> GV
>
> ----- Original Message -----
>
> From: E, Manivannan <mailto:manie at ti.com>
>
> To: winpcap-users at winpcap.org
>
> Sent: Friday, September 11, 2009 9:55 AM
>
> Subject: Re: [Winpcap-users] pcap_findalldevs_ex hangs
> inside java process
>
>
>
> I am using Window XP with SP2.
>
>
>
> Regards,
>
> Mani
>
>
>
>
> ________________________________
>
>
> From: winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of
> Gianluca Varenni
> Sent: Friday, September 11, 2009 10:19 PM
> To: winpcap-users at winpcap.org
> Subject: Re: [Winpcap-users] pcap_findalldevs_ex hangs
> inside java process
>
>
>
> Which version of Windows are you using?
>
>
>
> Have a nice day
>
> GV
>
> ----- Original Message -----
>
> From: E, Manivannan <mailto:manie at ti.com>
>
> To: winpcap-users at winpcap.org
>
> Sent: Friday, September 11, 2009 9:28 AM
>
> Subject: Re: [Winpcap-users]
> pcap_findalldevs_ex hangs inside java process
>
>
>
> I am not using java wrapper. I am using the
> winpcap lib inside C++ code which is built as a dll. Eclipse
> env is used as IDE mainly for user interface. When used in
> with eclipse GUI, the pcap_findalldevs_ex doesn't hang but
> hangs when execute on command-line.
>
>
>
> Regards,
>
> Mani
>
>
>
>
> ________________________________
>
>
> From: winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of
> Gianluca Varenni
> Sent: Friday, September 11, 2009 9:14 PM
> To: winpcap-users at winpcap.org
> Subject: Re: [Winpcap-users]
> pcap_findalldevs_ex hangs inside java process
>
>
>
> Are you using any of the jave wrapper already
> available for WinPcap?
>
>
>
> Have a nice day
>
> GV
>
> ----- Original Message -----
>
> From: E, Manivannan <mailto:manie at ti.com>
>
> To: winpcap-users at winpcap.org
>
> Sent: Friday, September 11, 2009 1:06 AM
>
> Subject: [Winpcap-users]
> pcap_findalldevs_ex hangs inside java process
>
>
>
> Hi,
>
> I am using the Winpcap lib in
> eclipse (Java) environment and "pcap_findalldevs_ex" work
> fine return all the devices but when I use eclipse directly
> Java in command line-mode i.e. in command prompt then
> "pcap_findalldevs_ex" hangs, never return whether it failed
> or passed. I suspected the "Remote Capture Service" is not
> getting started, so I tried enabling the service manually &
> tried but still the "pcap_findalldevs_ex" hangs. Any clues on
> what's going wrong here?
>
>
>
> Winpcap Version - 4.0.2
>
>
>
> Regards,
>
> Mani
>
>
>
>
> ________________________________
>
>
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>
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>
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