Accessing TCP connection state information

i am trying to find a method of access to the current state information (and other data would be nice) of TCP sessions. i noticed that in /usr/include/netinet/tcp_var.h it would appear as though there is support for this type of thing, however i cannot seem to locate any supporting documentation. thanks for any help,
/kris

i think perhaps we are miscommunicating. i would like to be able to access this information (yes, programmatically) and hopefully obtain some primitive read locking so i do not end up with stale state information as soon as i have obtained it. i apologize if you thought i would post a question such as how to operate netstat to this discussion group. thanks again,
/kris

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API / Webservice to access the state information of a bpel process instance

Hi,
i have a question about the ccBPM runtime API.
Is there a API or Webservice provided by SAP XI/PI, which accesses the state information of a bpel process instance.
"access" means:
1. At which activity is the current process instance located
2. Access to the context information of the process
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Di

Hi Swarup,
Thanks for your quick reply.
I designed a simple BPM process with less than 10 activities. To monitor the process running state i want to build a small AddOn instead of using the standard xi monitoring tool because of its complexibility.
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Outgoing TCP connections from VM have very low firewall state idle timeout -- how do you adjust?

When I create a TCP connection from a VM to the internet, if I'm idle for more than a few minutes (say a SSH session), the TCP flow is torn down by some AZURE networking element in between.
Incoming connections from the internet in don't seem to be affected.
I assume this is an Azure firewall timeout somewhere.
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Hi,
Thanks for posting here.
Here are some suggestions:
[1] - You can make sure the TCP connection is not idle. To keep your TCP connection active you can keeping sending some data before 60 seconds passes. This could be done via chunked transfer encoding; send something or you can just send blank lines to keep
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[2] - If you are using WCF based application please have a look at below link:
Reference:
http://code.msdn.microsoft.com/WCF-Azure-NetTCP-Keep-Alive-09f50fd9
[3] - If you are using TCP Sockets then you can also try ServicePointManager.SetTcpKeepAlive(true, 30000, 30000) might be used to do this. TCP Keep-Alive packets will keep the connection from your client to the load balancer open during a long-running HTTP
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Anyone else having an issue with TCP connections using iCloud for Windows?

Hi,
Before I asked this question, I did wait to see if any related questions came up, but none did, so I submit it now.
On my admittedly older laptop running Windows 7 64b Home, I've run into difficulties with the iCloud for Windows app to the extent that I had to uninstall it.
It would that, as my laptop was running, in the background, iCloudServices.exe would endlessly iterate TCP connections, which, while not actively sending or receiving any data, after some hours would number over 100 instances, taking up resources, and grinding my laptop's WiFi connection to a grindingly slow pace. I ended up, within the app, turning off everything, iCloud Drive and Photos, (I never used bookmarks), but still this would continue to occur.
I contacted Apple Support, explaining what was going on, and they stated they only dealt with IOS and gave me a Microsoft Support number. When I called Microsoft support, I came more and more to the realization that the issue was specifically with the iCloud for Windows app, as that was the only software that was endlessly creating and not closing TCP connections as it was. How was Microsoft supposed to solve an issue with Apple code?
So I called Apple back, whereupon they insisted it was a Microsoft issue. I explained other cloud services installed on the same computer were not having the same issue, it was unique to ICloudServices.exe. They stated they only dealt with IOS. I stated I purchased an iPad Air less than 7 months ago, and was trying to run iCloud in support of that. They again stated they only dealt with IOS, and suggested I again try Microsoft. I asked them if it was reasonable to expect Microsoft to solve issues with Apple code? They said regardless, there was zero support offered for anything having to do with Windows, and all I could do was uninstall the app, which I did, though that did not feel very satisfactory to me. My thinking is, if Apple writes a Windows app in support of their hardware, they should offer support for it.
Anyway, I was just wondering, is this an issue unique to me? or have others experienced a similar issue? I found this issue by opening the Windows Resource Monitor, looking under the Networking tab, and scrolling through the TCP Connections section to find 100+ concurrent iCloudServices.exe instances listed, whereas even Chrome, with multiple tabs and extensions, topped out at around 20.
My one month old Desktop, DYI, sports a solid Asus 1150 MoBo, i7-4790k cpu, 16GB Ram, and an EVGA GTX 970 video card. I list some specs only to illustrate this computer has no hardware issues in comparison to my long in tooth laptop. On this desktop, running Win 8.1 Pro 64b, at least as many, identifiably Apple, background service TCP connections are created even compared to Chrome, regardless of many tabs being open, many extensions, and even some related apps. Adobe does not even come close, though I run the full CC subscription. On this new computer, running Windows 8.1 Pro 64b, there are currently over 50 TCP connections and loopbacks that do not identify themselves, with just a - for the Image, and PID. With the experience on my laptop, I wonder how many of these are generated by Apple software, if not specifically iCloud software?
The frustrating aspect of these connections is they seem in no way active, While the Chrome and Adobe connections can be seen to be transferring data, as long as I am not running iTunes, or so have my iPad actually plugged in, it seems 99% of the time these iCloudServices.exe connections are just taking up ports, neither sending nor receiving any data discernable to me under the Processes with Network Activity, or Network Activity lists, both displayed in the same window as the TCP Connections in the Windows Resource Monitor.
Though I am fairly ignorant as regards coding, it seems as if there is no call to close a connection, very specifically, iCloudServices.exe, when it is no longer needed, and the next time a connection is needed, a new one is opened, rather than accessing the one previously opened. The only other reason I could imagine this might be occurring is if my Norton Internet Security software might mask and/or block the port after a certain time of inactivity.
Anyone out there have any ideas or advice about this? Thanks in advance.

Thanks jared,
I'm still dealing with this issue through Apple. Some time after I posted this, I contacted Apple again. They did start a case up for me, as I was experiencing the same behavior on two different machines, with two different versions of Windows.
So far it remains unsolved. I've logged iClouds for Windows on my desktop, which is brand new, then logged for awhile after completely uninstalling Norton Security Suite, depending on the Microsoft security for some time, and finally logged after I uninstalled iCloud for Windows, restarted, installed a clean download, and connected using a completely different test account, which Apple set up for me. None of this made any difference. Looking at the logs, it seems every 10 minutes, iCloudServices.exe creates a new TCP connection to confirm I'm using less than 5GB on iCloud, (which I am by a good margin, using less than 2GB), it seems this connection is not closed, and when the next iteration rolls around 10 minutes later, a new TCP connection is created. I come very close to having 6 TCP connections created per hour, until I restart my computer. This works out to... 6 x 24 = 144/day.
Perhaps the article you posted will shed some further light on this. I'm thinking seeing the state of the connection through netstats, at the least, could help.
For the last week, I've been putting a hold on further logging, as Apple wants me to create a new user account on one of my computers, install iCloud for Windows there, and log it running in the other account. This however basically means I cannot use my computer for a fair number of hours, and I've been busy enough with work the past week that I haven't the time or energy to afford to set this up and run it. I've had need of my computers too much for the past week.

TCP connections alive well after Firefox is closed

According to Sysinternals TCPView, I have several TCP connections that stay open (established) well after I close and exit Firefox, I'm talking 8 hours after. Normal connections close within minutes if shutting down Firefox. I'd post a pic, but there is no option for it so here's a paste (commas instead of tabs):
process/protocol, local address, remote asddress, state
firefox.exe.7108, TCP, russ-l675,gt,rr,com.53713, dfw06s17-in-17.1e100.net:http, established
firefox.exe.7108, TCP, russ-l675,gt,rr,com.54103, 203.30.164.5:http, established
I can (and do!) manually close these connections and they don't come back until I restart FF.
Thanks!
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Yes, but it's been disabled for over a week and this is still happening. Just to be sure, I will uninstall the add-ons. One of these resolves to Australia and the other to a Google server. Am I being watched? This info comes up from the "odd" IP address:
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Russ

TCP connection indicator

Hello I am using the "Example TCP IP Server" example from labview 8.5. I have a question about the connection indication. There is an light Indicator on for the connection that goes to the "TcpListen.vi" in the block diagram. When I open and close the connection properly the light indicates the proper state of the connection...but if my device fails (power off) without closing the connection properly, then the vi "Example TCP IP Sever" still indicates that there is a connection (light still on when it should be off).
My Question is how to get the TCPListen.vi to "check"(for lack of better word) on the connection to see if it is actually open. Or should I use some other VI Any help is appreciated thank you.

There isn't any way to passively detect a connection loss reliably. If the remote side properly closes down the connection, then you will see the connection closed by peer error, but if it simply drops out while in idle state, this may never occur. The only way to reliably detect the fact that the remote side has been disconnected, unexepectedly shutdown, cable broken, or whatever is to attempt some sort of data transfer. So it needs to be able to accept incoming commands even if it is as simple as a a status inquiry that needs to be answered with at least a short, "yes I'm still there" but it could be also a command to retrieve some information such as current settings, data values or such.
So look through the documentation and see if there is a command in your device that does not change anything in the device but gives you a response in some way. Then use that to poll your device periodically (not several times a second, but probably also not only every hour) and use the error of the TCP Read that follows your TCP Write to determine the connection state.
You mention that your program already does TCP Reads. How are they initiated? Does the device simply spew data periodically? Or do you request the data with a command? In both cases you do know that there should be a response and that since there isn't something must be wrong with your device and you can safely assume that it went somehow belly up. The right thing to do then is to not ignore the timeout error after the period that you know the device should have answered, but instead close the connection and attempt to reconnect again, which will then give you an according error if the device is still not reachable.
And no you can't open up yellow LabVIEW nodes any further. They call directly C functions in the LabVIEW kernel, so there is nothing that could be made visible to you anymore. Those LabVIEW kernel functions ultimately call the platform network socket APIs, a very powerful but also quite cumbersome API to work with as programmer. Be happy that you do not have to deal with that level of programming.
Message Edited by rolfk on 11-01-2009 10:41 AM
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Inbound TCP connection denied from x to y

Hi Everyone,
Seeing following logs on ASA:
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Regards
MAhesh

Hello Maheshm
First option Asymmetric routing, use the TCP state-bypass option as a workaround.
Remove the asymetric routing as the real fix
Check my blog at http:laguiadelnetworking.com for further information.
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Excessive Port 80 TCP Connections? How many connections are normal?

Hi. I'm running MacOS X 10.3.9 on a Mac Powerbook (with all of Apple's latest Security Updates installed. It is a virgin installation and no other software programs have been installed). I then installed Norton Personal Firewall 3.0.2 in order to monitor all my ports.
By default, Norton Personal Firewall (NPF) is not set to log the number of outgoing connections for port 80, although port 80 is the port typically used by most web browsers to contact other sites on the web. If you disable port 80, then your browser will not be able to function or access the web. Therefore it is mandatory that you leave that port open. But what if some unknown hacker wrote a Trojan program to specifically ferry information out of your computer and back to him using that port, then there'd be no way to stop it once the Trojan was in place. If you disabled the port to prevent it, then you'd also disable yourself from the web. If you opened the port for your browser, then the trojan would have free and open access. At least that is the theory that has me wondering about the seemingly high number of outgoing port 80 connections displayed in my NPF logging window. Therefore, I'd very much like to find out if other users who are running a version of Panther with NPF are experiencing the same high connections behavior on port 80.
To create the scenario for this behavior, basically you just open your NPF panel and enable all logging for port 80 (by default it is disabled). For those of you who don't specifically know how to do this, the following is the directions . . .
. . . Open your NPF Service Settings pane. From this pane, highlight the service called Web Sharing Port 80. Click the Edit button at the bottom of the selection window. A new pane will then show the controls named Ports, Logging, and Notification. Bring forward the Logging controls and enable both checkboxes for Allowed and Denied for the Outgoing direction. Click Save and close the window.
Once the above is done, close all other windows and open your NPF Logging window on your desktop and keep it visible for you to look at. Clear all existing entries in the log so you'll start with a clean slate. With everything set up and a web connection available, open your Safari browser (or any browser) to an online web site. On my computer, my Safari bowser is set to open to Apple's website - www.apple.com. Once the browser is open, Apple's website is then displayed.
The result . . . surprisingly, after only a few seconds, a HUGE number of port 80 TCP connections to that website address start to show up and flow into my log. In a matter of only 3 or 4 seconds, at least 250 separate TCP connection entries will show up in my log, and they all have the same web address. If I then click on anything on the page or surf to any other website, the log entries will change to the new site address and start up again, and in some cases, in a matter of less than a minute the number of entries can easily reach into the thousands. I've seen 20,000 entries or more flow into my log after a couple of minutes. And the only way to stop the madness and the entries is to disconnect from the web. Those many entries and this behavior does not seem normal to me, no matter what port is selected and no matter what log settings are enabled. A dozen to 15 or 20 entries for a given site I can understand (I've been told some browsers can open at least 10 connections at a time), but hundreds to thousands, I cannot. I can't understand why any program under any circumstance would need to generate those many log entries in such a short time frame. My problem is I have nothing to compare this data to, I only have my suspicions and have no way of knowing whether this behavior is normal or not. So I am asking for others to make a comparison on their computer if you are running any version of Panther and Norton Personal Firewall and give me your results so I can determine what is normal or not. I've heard of certain hacker attacks called TCP flooding and other forms of attacks, and I don't want my computer to have been secretly taken over by a hacker or the initiator of such attacks unknowingly. Furthermore, this is not anything an average user would even normally notice, simply because Port 80 logging is not usually enabled in NPF. Nevertheless, I need to find out the root of this problem and learn whether this is normal. Other than these high number of connection entries, my web surfing seems normal and I haven't yet experienced any seeming sluggishness accessing sites. Any help anyone can offer I would appreciate. Thanks to everyone in advance.
Here are some images of my own settings and results:
http://homepage.mac.com/starshone/misc/Port80Settings.jpg
http://homepage.mac.com/starshone/misc/Port80Log.jpg
Mac OS X (10.3.9)

But all those connections are how the web works. Each HTML page has dozens or more links. Each graphic or other page element is a new HTTP request on port 80 back to the originating server (or another server even). So it's normal to have a lot of port 80 connections going out if you surf the web.
You can see the individual elements that make up a page in Safari by going to the "Window" menu and showing the "Activity" window. I see CNN's web site tonight has 113 items on its home page. Apple's is 41. My home page is 10. So it's easy to get a lot of connections.
Some applications also use port 80 to check for updates, so you might see the occasional port 80 connection even when you're not surfing the web. These are also nothing to worry about.
charlie

Sharing a TCP Connection

I have an embedded processor that opens a TCP socket to a program running on a web server and dumps real time measurements on to the server. I am trying to design an applet that opens a TCP connection to this program and thus gain access to the information dumped by the embedded system. This works fine for a single applet. But when I try doing it with several applets at a time, I run into trouble since all these applets try to read from the socket to the processor.
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Prathap

There is absolutely nothing that stops one from connecting to a single server using multiple sockets from a single application.
So you doing something wrong in your socket code.

Why when I try to login the Itunes Connect with my Apple ID it always says: "Apple ID does not have permission to access iTunes Connect."?

Why when I try to login the Itunes Connect with my Apple ID it always says: "Apple ID does not have permission to access iTunes Connect."?

Look on one of your bank statements and be sure to enter the billing address exactly as it shows on the statement. Some folks forget where they actually get the statement. They put their home address in iTunes/Mac App Store and they actually get the statement at their place of employment or vice versa.

Cannot upload epub book: Apple ID does not have permission to access itunes connect.

Apple ID does not have permission to access itunes connect.
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been a long long time and I have not received any help at all. - Steve Jobs are you out there? Lots of other people are having similar or the same problem.
From Erik
<Edited by Host>

I have the same problem -- please post if you find the solution.

Why is my Apple ID not allowed to access iTunes Connect?

I'm trying to apply to post my podcast via iTunes, but in the process of trying to apply, I receive an error message informing me that my Apple ID is not authorized to access iTunes Connect. Any suggestions?

Are you able to sign into the iTunes Store and purchase items with that ID? If so I've no idea why you should get this message. However, though I'm not familiar with iTunes Connect, I'm not sure it's got anything to do with posting podcasts. To submit a podcast you go to
https://phobos.apple.com/WebObjects/MZFinance.woa/wa/publishPodcast
Is that what you've been doing?

ITunes Connect login - Apple ID does not have permission to access iTunes Connect.

Hi,
I have a company iPhone developer account which I registered two years ago. I have renewed it and it has not expired. I am the agent and I know the Apple ID and password as I login to the dev portal fine. I am now trying to publish my first app under this account but I get this message when trying to log into iTunesConnect Apple ID does not have permission to access iTunes Connect.
My account seems to be in some strange state as I invited another developer to my team (my hotmail email account) and then tried to make that user the Agent but that didn't even work, my new user shows up in the list of developers/team members, but I cannot select them in the dropdown to make them the agent, only my current agent name shows.
Is this a hand off to Apple support situation? I am up against a hard deadline and fear this is going to add significant delays waiting for Apple support to look into it (I've seen some other posts of people waiting 3 weeks with this problem and getting nowhere with support).
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I only had the one login before. Yesterday to try to solve it I invited my hotmail account as a developer to the team. I then tried to make that developer the agent, but even though it shows in the team members, I cannot select the account to be the agent as its not in the dropdown list.
I am on OS X 10.7.3, using Safari. The dev account did not expire, I renewed it in April 2012 so there is plenty of time left on it. I am really stuck, this is so frustrating.

How to prevent a TCP connection being closed when the VI that opened it finishes.

Hello everyone.
I am developing an application based around servers and clients communicating over TCP in LabVIEW 2012.
When the server/client opens a TCP connection ,it launches an asynchronosly running "connection handler", to which it passes the connection reference which then takes over all the communcation. This all works fine.
However - I have a situation where a client's connection handler can be informed of another "new" server. I would like it to open the connection (to see if it is still valid) and then pass this connection reference back to the client's main code to spawn a new connection handler. This prevents me locking up the Client's main code with a long-ish timeout if the "new" server is not actually accepting connections.
The issue is that if the connection handler that opened up the connection to the "new" server is stopped, then it appears to destroy the reference that it opened. This means that the other connection handler that was merrily communcating with the "new" server has its TCP communciations closed (I get an Error code 1 on a write).
I have created an example to demonstrate the issue which should be used as follows:
1. Run server.vi - it will listen for a connection on the port specifed on its BD.
2. Run CH Launcher.vi - it will open a connection to the server and pass the TCP reference to an instance of Connection Handler.vi which it launches.
3. The Connection Handler should send data to the Server
4. Stop the CH Launcher.vi
5. The Connection Handler.vi will error.
Any suggestions would be much appreciated.
Cheers
John
Solved!
Go to Solution.
Attachments:
TCP Test.zip ‏35 KB

John_Neutron escreveu:
In my case I have changes the part of the code that opens the TCP connection to a VI that has the same lifetime as the main VI so that any connections that have been opened will only be closed automatically when the main VI stops.
And what are the effects? You are still facing the same problem or closing the connection only when the whole applicaton stops solved your problem?
Regards
Mondoni

Forefront TMG disconnected a non-TCP connection

Hi,
I am getting the following error alerts in TMG
Forefront TMG disconnected a non-TCP connection from 192.168.0.1 because the connection limit for this IP address was exceeded. Larger custom connection limits should be configured for the IP addresses of chained proxy servers and back-to-back Forefront
TMG computers with a NAT relationship.
This error show two msgs for my both dns servers.
My DNS servers Ip addresses
192.168.0.1
192.168.0.2
Please help me out
Thanks

Hi,
How about editing the Maximum non TCP sessions per second per rule setting?
For more information:
http://technet.microsoft.com/en-us/library/dd441028.aspx
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Joyce
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Accessing TCP connection state information

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