[Exporting data][1]&lt;br&gt;
Just select Displayed in the [Packet Range][2] frame.

Note that with newer builds of Wireshark for Windows, this is available only with &quot;Export Specified Packets&quot;, not with &quot;Save&quot; or &quot;Save as&quot; options.

  [1]: http://www.wireshark.org/docs/wsug_html_chunked/ChIOExportSection.html
  [2]: http://www.wireshark.org/docs/wsug_html_chunked/ChIOPacketRangeSection.html

I am looking for a way to call a method on a new thread (using C#).

For instance, I would like to call `SecondFoo()` on a new thread. However, I would then like to have the thread terminated when `SecondFoo()` finishes.

I have seen several examples of threading in `C#`, but none that apply to this specific scenario where I need the spawned thread to terminate itself. Is this possible?

**How can I force the spawned thread running `Secondfoo()` to terminate upon completion?**

Has anyone come across any examples of this?


C# Call a method in a new thread

I&#39;m interested in network analysis on large networks with millions of nodes and tens of millions of edges.  I want to be able to do things like parse networks from many formats, find connected components, detect communities, and run centrality measures like PageRank.

I am attracted to NetworkX because it has a nice api, good documentation, and has been under active development for years.  Plus because it is in python, it should be quick to develop with.

In a recent presentation (the slides are available on github [here][1]), it was claimed that:

&gt; Unlike many other tools, NX is designed to handle data on a scale
relevant to modern problems...Most of the core algorithms in NX rely on extremely fast legacy code.

The presentation also states that the base algorithms of NetworkX are implemented in C/Fortran.

However, looking at the source code, it looks like NetworkX is mostly written in python.  I am not too familiar with the source code, but I am aware of a couple of examples where NetworkX uses numpy to do heavy lifting (which in turn uses C/Fortran to do linear algebra).  For example, the file `networkx/networkx/algorithms/centrality/eigenvector.py` uses numpy to calculate eigenvectors.

Does anyone know if this strategy of calling an optimized library like numpy is really prevalent throughout NetworkX, or if just a few algorithms do it?  Also can anyone describe other scalability issues associated with NetworkX?

**Reply from NetworkX Lead Programmer**
I posed this question on the NetworkX mailing list, and Aric Hagberg replied:

&gt; The data structures used in NetworkX are appropriate for scaling to
&gt; large problems (e.g. the data structure is an adjacency list).  The
&gt; algorithms have various scaling properties but some of the ones you
&gt; mention are usable  (e.g. PageRank,  connected components, are linear
&gt; complexity in the number of edges).
&gt; 
&gt; At this point NetworkX is pure Python code.  The adjacency structure
&gt; is encoded with Python dictionaries which provides great flexibility
&gt; at the expense of memory and computational speed.  Large graphs will
&gt; take a lot of memory and you will eventually run out.
&gt; 
&gt; NetworkX does use NumPy and SciPy for algorithms that are primarily
&gt; based on linear algebra.  In that case the graph is represented
&gt; (copied) as an adjacency matrix using either NumPy matrices or SciPy
&gt; sparse matrices.  Those algorithms can benefit from the legacy C and
&gt; FORTRAN code that is used under the hood in NumPy and SciPY.

  [1]: https://github.com/drewconway/NetworkX_Intro_Materials

What scalability issues are associated with NetworkX?

I applied a filter in wireshark to display only the incoming packets to my PC. When I save the filtered/displayed packets to a .csv file, I actually saves all the packets (un-filtered). How can I save only the displayed/filtered packets?

Saving the displayed/filtered packets in wireshark

<p>I applied a filter in wireshark to display only the incoming packets to my PC. When I save the filtered/displayed packets to a .csv file, I actually saves all the packets (un-filtered). How can I save only the displayed/filtered packets?</p>


I would like in my application to find a way to synch the date and time with something given by an external source.

I don&#39;t want to use the phone time because I might get a difference of maybe 5 minutes around real time. and 5 minutes extra or less = 10 minutes! 

I have heard about time information in the GPS satellites or in Network antennas.

I have tried with System.getCurrentTime but i get the current the of the device, so, if my device is set up 5 minutes earlier, it display the wrong time.

**EDIT**

To make a short question: how can I get this time?

![enter image description here][1]


  [1]: http://i.stack.imgur.com/BJW9x.jpg

How can I get the &quot;network&quot; time, (from the &quot;Automatic&quot; setting called &quot;Use network-provided values&quot;), NOT the time on the phone?

I&#39;m interested in connecting to iOS-based devices over Bluetooth. I can see that the &quot;Local Network&quot; service is exposed, but I cannot find any extra information about it. Property stored under key 0x0204 looks like a Bonjour key.

Which protocol is used? How can one talk to the iOS device using Linux, Mac or one&#39;s own embedded device equipped with a Bluetooth chip?

Here&#39;s SDP data extracted using Bluetooth Explorer under OS X while the iOS device runs Gameloft&#39;s Star Battalion.

		{
			0x0000 = uint32(1330188565),
			0x0200 = uint32(2),
			0x0202 = string(004wD7l1A..0|0|0|ivucic-&#192;&#39;),
			0x030a = uint32(0),
			0x0009 = { { uuid16(11 15), uint16(256) } },
			0x0201 = string(_657o30a6rmst07&#192;),
			0x0005 = { uuid16(10 02) },
			0x0100 = string(Local Network),
			0x0001 = { uuid16(11 15) },
			0x0203 = string(004wd7l1a..0|0|0|ivucic-_657o30a6rmst07&#192;
			0xf000 = uint8(2),
			0x0204 = string(	txtvers=1state=A),
			0x0008 = uint8(255),
			0x0006 = { uint16(25966), uint16(106), uint16(256), uint16(26226), uint16(106), uint16(272), uint16(25701), uint16(106), uint16(288), uint16(27233), uint16(106), uint16(304) },
			0x0004 = { { uuid16(01 00), uint16(15) }, { uuid16(00 0f), uint16(256), { uint16(2048), uint16(2054) } } },
			0x0002 = uint32(0)
		},

Other partially relevant questions:

 * [PAN with Linux, iOS, Bluetooth, Bonjour, GameKit — Possible?](https://stackoverflow.com/questions/7251023/pan-with-linux-ios-bluetooth-bonjour-gamekit-possible) - Person can solve problem using Wi-Fi. Not solution here because embedded device will not have the way more expensive Wi-Fi chip.
 * [Bonjour over bluetooth WITHOUT Gamekit?](https://stackoverflow.com/questions/3844189/bonjour-over-bluetooth-without-gamekit) - Best answer does not end up providing technical details
 * [iOS bluetooth without GameKit](https://stackoverflow.com/questions/7230311/ios-bluetooth-without-gamekit) - Provides a solution for a jailbroken device, which is not applicable here.

---

Researching further with Apple&#39;s Bluetooth Explorer in OS X and `sdptool` in GNU/Linux, I have discovered that key `0x0001` (standing for &quot;protocol class&quot;), containing value of `0x1115`, stands for the &quot;PANU&quot; variant of &quot;PAN&quot; - a peer2peer variant. It is notable that OS X does not provide service-side (&#39;hosting&#39;) support for this protocol, despite supporting creation of a `0x1116` network, which is the &quot;NAP&quot; variant of &quot;PAN&quot; - a client/server variant.

This might be good news, but only if GameKit&#39;s session protocol does not have to be used. Hijacking the media-layer connection established by GameKit in order to send other UDP traffic would be ideal.

I&#39;ll still have to research whether or not this GameKit connection really is `0x1115`; that is, if it really is &quot;PANU&quot;. Does anyone have any further information?

---
Note while Bonjour automatically announced this Bluetooth service after iOS 3, this has changed with iOS 5. See the answer I posted on [how to establish Bluetooth connection without GameKit](https://stackoverflow.com/q/8273661/39974), where I handily documented information from Apple&#39;s [Technical Q&amp;A QA1753](http://developer.apple.com/library/ios/#qa/qa1753/_index.html#//apple_ref/doc/uid/DTS40011315).

---
A small amount of research with GNU/Linux did not result in a successful connection. It may be due to lack of knowledge on how to properly use `pand`. It may also be due to Bluetooth MAC based blocking. I&#39;d love info anyone may have to offer. If I research this further and stumble upon something interesting, I&#39;ll update this answer.

---
Results under Ubuntu. The service appears only when Bluetooth Bonjour is active.

    ivucica@ivucica-MacBook:~$ sdptool browse $ADDR #relevant data only
    Browsing ADDRESS_HERE ...
    Service Name: Local Network
    Service RecHandle: 0x4f491115
    Service Class ID List:
      &quot;PAN User&quot; (0x1115)
    Protocol Descriptor List:
      &quot;L2CAP&quot; (0x0100)
        PSM: 15
      &quot;BNEP&quot; (0x000f)
        Version: 0x0100
        SEQ8: 0 6
    Language Base Attr List:
      code_ISO639: 0x656e
      encoding:    0x6a
      base_offset: 0x100
      code_ISO639: 0x6672
      encoding:    0x6a
      base_offset: 0x110
      code_ISO639: 0x6465
      encoding:    0x6a
      base_offset: 0x120
      code_ISO639: 0x6a61
      encoding:    0x6a
      base_offset: 0x130
    Profile Descriptor List:
      &quot;PAN User&quot; (0x1115)
        Version: 0x0100
    
    ... and so on ...

Here&#39;s the attempt to connect:

    ivucica@ivucica-MacBook:~$ pand --connect $ADDR -n
    pand[3237]: Bluetooth PAN daemon version 4.98
    pand[3237]: Connecting to ADDRESS_HERE
    pand[3237]: Connect to ADDRESS_HERE failed. Connection refused(111)

Is some sort of authorization required? Enabling encryption, authentication, secure connection and forcing becoming a master doesn&#39;t seem to make any difference (`-AESM` options in various combinations).

Anyone has any ideas?

---
Huh!

&lt;pre&gt;ivucica@ivucica-MacBook:~$ sudo hcidump
HCI sniffer - Bluetooth packet analyzer ver 2.2
device: hci0 snap_len: 1028 filter: 0xffffffff
&lt; HCI Command: Create Connection (0x01|0x0005) plen 13
    bdaddr ADDRESS_HERE ptype 0xcc18 rswitch 0x01 clkoffset 0x0000
    Packet type: DM1 DM3 DM5 DH1 DH3 DH5 
&gt; HCI Event: Command Status (0x0f) plen 4
    Create Connection (0x01|0x0005) status 0x00 ncmd 1
&gt; HCI Event: Role Change (0x12) plen 8
    status 0x00 bdaddr ADDRESS_HERE role 0x01
    Role: Slave
&gt; HCI Event: Connect Complete (0x03) plen 11
    status 0x00 handle 12 bdaddr ADDRESS_HERE type ACL encrypt 0x00
&lt; HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2
    handle 12
&gt; HCI Event: Command Status (0x0f) plen 4
    Read Remote Supported Features (0x01|0x001b) status 0x00 ncmd 1
&gt; HCI Event: Read Remote Supported Features (0x0b) plen 11
    status 0x00 handle 12
    Features: 0xbf 0xfe 0x8f 0xfe 0x9b 0xff 0x79 0x83
&lt; HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3
    handle 12 page 1
&gt; HCI Event: Command Status (0x0f) plen 4
    Read Remote Extended Features (0x01|0x001c) status 0x00 ncmd 1
&gt; HCI Event: Max Slots Change (0x1b) plen 3
    handle 12 slots 5
&gt; HCI Event: Read Remote Extended Features (0x23) plen 13
    status 0x00 handle 12 page 1 max 1
    Features: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00
&lt; HCI Command: Remote Name Request (0x01|0x0019) plen 10
    bdaddr ADDRESS_HERE mode 2 clkoffset 0x0000
&gt; HCI Event: Command Status (0x0f) plen 4
    Remote Name Request (0x01|0x0019) status 0x00 ncmd 1
&gt; HCI Event: Remote Name Req Complete (0x07) plen 255
    status 0x00 bdaddr ADDRESS_HERE name &#39;Evil iPad&#39;
&lt; HCI Command: Authentication Requested (0x01|0x0011) plen 2
    handle 12
&gt; HCI Event: Command Status (0x0f) plen 4
    Authentication Requested (0x01|0x0011) status 0x00 ncmd 1
&gt; HCI Event: Link Key Request (0x17) plen 6
    bdaddr ADDRESS_HERE
&lt; HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
    bdaddr ADDRESS_HERE key B05AEA095C06217B2ACE9958DA722C91
&gt; HCI Event: Command Complete (0x0e) plen 10
    Link Key Request Reply (0x01|0x000b) ncmd 1
    status 0x00 bdaddr ADDRESS_HERE
&gt; HCI Event: Auth Complete (0x06) plen 3
    status 0x00 handle 12
&lt; HCI Command: Set Connection Encryption (0x01|0x0013) plen 3
    handle 12 encrypt 0x01
&gt; HCI Event: Command Status (0x0f) plen 4
    Set Connection Encryption (0x01|0x0013) status 0x00 ncmd 1
&gt; HCI Event: Encrypt Change (0x08) plen 4
    status 0x00 handle 12 encrypt 0x01
&lt; ACL data: handle 12 flags 0x00 dlen 10
    L2CAP(s): Info req: type 2
&gt; HCI Event: Number of Completed Packets (0x13) plen 5
    handle 12 packets 1
&gt; ACL data: handle 12 flags 0x02 dlen 16
    L2CAP(s): Info rsp: type 2 result 0
      Extended feature mask 0x02a8
        Enhanced Retransmission mode
        FCS Option
        Fixed Channels
        Unicast Connectless Data Reception
&lt; ACL data: handle 12 flags 0x00 dlen 10
    L2CAP(s): Info req: type 3
&gt; HCI Event: Number of Completed Packets (0x13) plen 5
    handle 12 packets 1
&gt; ACL data: handle 12 flags 0x02 dlen 20
    L2CAP(s): Info rsp: type 3 result 0
      Fixed channel list 0x00000006
        L2CAP Signalling Channel
        L2CAP Connless
&lt; ACL data: handle 12 flags 0x00 dlen 12
    L2CAP(s): Connect req: psm 15 scid 0x0040
&gt; HCI Event: Number of Completed Packets (0x13) plen 5
    handle 12 packets 1
&gt; ACL data: handle 12 flags 0x02 dlen 16
    L2CAP(s): Connect rsp: dcid 0x0000 scid 0x0040 result 2 status 0
      Connection refused - PSM not supported
&gt; HCI Event: Disconn Complete (0x05) plen 4
    status 0x00 handle 12 reason 0x13
    Reason: Remote User Terminated Connection
&lt;/pre&gt;

This?
&lt;pre&gt;
&gt; ACL data: handle 12 flags 0x02 dlen 16
    L2CAP(s): Connect rsp: dcid 0x0000 scid 0x0040 result 2 status 0
      Connection refused - PSM not supported
&lt;/pre&gt;

Using iOS GameKit&#39;s &quot;Bluetooth Bonjour&quot; with other platforms

My project is using AFNetworking.

https://github.com/AFNetworking/AFNetworking

How do I dial down the timeout? Atm with no internet connection the fail block isn&#39;t triggered for what feels like about 2 mins. Waay to long....

How to set a timeout with AFNetworking

Does somebody knows how to close a TCP or UDP socket for a single connection via windows command line?

Googling about this, I saw some people asking the same thing. But the answers looked like a manual page of netstat or netsh commands focusing on how to monitor the ports. I don&#39;t want answers on how to monitor them (I already do this). I want to close/kill them.

EDIT, for clarification: Let&#39;s say that my server listens TCP port 80. A client makes a connection and port 56789 is allocated for it. Then, I discover that this connection is undesired (e.g. this user is doing bad things, we asked them to stop but the connection didn&#39;t get dropped somewhere along the way). Normally, I would add a firewall to do the job, but this would take some time, and I was in an emergency situation. Killing the process that owns the connection is really a bad idea here because this would take down the server (all users would lose functionality when we just want to selectively and temporally drop this one connection). 

How to close TCP and UDP ports via windows command line

I am working on a Java EE Application in a Windows environment. (I am using Windows 7)

I am using Tomcat Server, unfortunately port number 8080 is busy (used by Oracle). Now I want to assign a different port to Tomcat.

So before changing inside conf/server.xml file, I want to make sure that a certain port is not occupied by any other process and it&#39;s free.



How to make sure that a certain Port is not occupied by any other process

How can I capture mobile phone traffic on Wireshark?

Capturing mobile phone traffic on Wireshark

Is there a way to clear the capture window in Wireshark without restarting the capture or re-applying the filter? It&#39;s difficult to tell one set of traffic from another without looking very closely at the timestamp.

How do I clear the capture window in Wireshark?

I&#39;m curious as to how I could figure out the API URL an Android application (any app I have installed) uses if it makes API calls to some online server (a RESTful service for example). I presume I have to capture packets on the device and maybe analyse them in Wireshark or something to find the URL? I&#39;m fairly competent in Java/Android development, but a bit lost when it comes to any sort of network analysis business.


Sniffing an Android app to find API URL

I installed Wireshark on my mac with the command

    brew install wireshark

but after that, a message told me that I had to _curl_ and install _ChmodBPF_, so I did that too. 

But there is no command named Wireshark on terminal. What is wrong with that?

Install Wireshark on MacOS X via brew

I want to have `tcpdump` write raw packet data into a file and also display packet analysis into standard output as the packets are captured (by analysis I mean the lines it displays normally when `-w` is missing).
Can anybody please tell me how to do that?

How can I have tcpdump write to file and standard output the appropriate data?

Each time, when I manually run `tcpdump`, I have to use &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;C&lt;/kbd&gt; to stop it. Now I want to schedule my `tcpdump` with cronjob and I only need it to run for 1 and half hours. Without manually running &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;C&lt;/kbd&gt; or kill command, how can it be stopped automatically? Here is the command I am testing:

    tcpdump -i eth0 &#39;port 8080&#39; -w  myfile

I can schedule another cronjob  to kill the `tcpdump` process, but it seems not a good idea. 

Content Type	Original Author	Original Content on Stackoverflow
Question	user846400	View Question on Stackoverflow
Solution 1 - Networking	user684451	View Answer on Stackoverflow

Saving the displayed/filtered packets in wireshark

Networking Problem Overview

Networking Solutions

Solution 1 - Networking

What scalability issues are associated with NetworkX?

C# Call a method in a new thread

Attributions