Socket RAW InputStream.availalble () in stream wireless network always 0?

For all BlackBerry networking expert out there.

The explanation of the problem will be quite long, so I'll try to structure the message to facilitate navigation.

Introduction

Recently, we went from HttpConnection to raw sockets in our application. It wasn't an easy decision (a lot of extra code had to be written and debugged) - it stemmed from the fact that on different devices HttpConnection behaves very differently and sometimes we would just hang out here for always trying to read something, although enough bytes was available in the buffers of the system (I have seen it with my own eyes; can develop if anyone is interested). There are other reasons, but this has been the main.

Previously working solution

Once we went to the outlets and implemented our own HttpConnection (not me - someone to increase their knowledge in networks of BB did this), our problems have disappeared. In order to reduce the chance of getting stuck forever, we check InputStream.available () of the socket and, if there is always a thread. Sleep() 0, for some small interval (makes me cringe, but well, the user makes a call blocking!) then read just one byte (hoping that there might be something). It worked for all trackball/touchcpad devices and all kinds of connections (SDM is a separate issue, but we managed)...

New problem

... until we have tested the Storm (5.0 Storm1 and Storm2 - both 5.0 behaved similarly) with all, but connections WiFi disabled. We have connected WiFi router to the company (I then repeated the test at home with my wireless router and got the same results). BB browser worked fine. However, our code began fails on our internal waiting time. When I connected the phone to the debugger and set up breakpoints, I quickly discovered that InputStream.available () always zero returns! I'm not kidding!

Our code was constantly diverted waiting, waiting, reading another byte, read a byte... Even when I changed the way that we on the download time was exceptionally slow (as in "unbearable").

Worse still - when I tried to wait before making the first longer interval (100ms) read, followed by reading the characters one by one without waiting, the phone started rebooting randomly!

Request

Someone has seen something similar? If so, what was your approach? I won't sit idly while waiting the answers here - I have a few ideas to try-, but if anyone has been there, it would be nice if you can just push me in the right direction.

Thanks in advance,

Arkady.

Other people have had problems with available(). I'm surprised that you managed to get that you have to be honest, I thought he always returned 0.

We make socket connections, and always the transmission with a header field that contains prefix length. So read on the Blackberry is basically

(a) header to read

(b) reading of data

(d) proceed to (a).

Another user and I had problems recently with http and OS 5.0 using WiFi connections - circuit up to and/or time out when reading the response. This is the thread

http://supportforums.BlackBerry.com/T5/Java-development/network-IO-hang-on-OS5/m-p/541487

I would recommend you change your implementation of socket and detection of data along these kinds of lines, in other words, how data should be read and set up some kind of detection/stall.

Does make sense?

Tags: BlackBerry Developers

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Solution provided

Photosmart HP 7520: All wireless network devices will lose connectivity after printing
```
Dear all, 

    I have a problem with my HP Photosmart 7520 printer where all wireless network devices will lose connectivity after a printer has been sent to the printer.

* Summary
Wireless network unusable after sending one print to HP printer
No device ( computers nor smartphones ) can use the Internet nor access internal networks ( 192.168.0/24)

* Details
Turn HP printer on.  ( wireless direct is off - never turned on )
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Other devices ( phone/computers ) already connected and working.
From any device, send a document to the printer.
Printer prints document successfully.
Immediately after printer has printed all devices cannot access internet IP range ( including HP printer ) nor Internet nor router ( 198.168.0.1 ).

* Reproducibility
Always

* Work around
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Power off printer.
Reboot Internet router.

* Attempted solutions
Removed wireless configuration.
Factory reset.
Added wireless configuration back.
Powered on and off printer.

* Printing tested with
Tested with Macbook10.11/Windows 8/Ubuntu 12/Android 4.4.2

* Not tested
Ethernet cable directly connected to router.

* Internet Router
Netgear CG 3700
```
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---------------------

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--------------------

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http://www.ezlan.NET/Win7/net_connection_tcp.jpg

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http://www.ezlan.NET/Win7/net_dm.jpg

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http://www.ezlan.NET/Win7/net_connection_tcp.jpg

Make sure that if there is Wireless Utility a utility vendor is not running with the native Windows wireless utility.

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-------------

The following pages have been written for Win XP, certain terms, and locations of the menu are different in Windows 7. However, they represent the principles of the Wireless working in computers that are running the Windows operating system and can be used as a quick training to understand the basis of wireless computers work.

My wireless is not working - http://www.ezlan.net/wireless.html

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Seems that the Wireless does not work on the Dell.

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------------------

Assuming that wireless router is configured correctly, it is a signal and the wireless card on the computer is physically in.

Maybe this can help.

These steps and tell us where is the breaking point.

Check the Device Manager for the wireless card valid entry.

http://www.ezlan.NET/Win7/net_dm.jpg

If there is no valid entry, remove any entry from fake and re - install the drivers for the wireless card.

Check network connections to make sure that you have a network icon/entry wireless connection, and that the properties of the icon (right-click on the icon) are correctly configured with the TCP/IPv4 protocol in the properties of network connections.

http://www.ezlan.NET/Win7/net_connection_tcp.jpg

------------------

The wireless card drivers much also install utility wireless of the seller.

To ensure that if there is Wireless Utility a seller is not running with the native Windows wireless utility (Service WLAN).

----------------

Make sure you firewall No. preventing / blocks wireless components to join the network.

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If possible set up the firewall correctly, /Security costume otherwise totally uninstall and get rid of its remaining processes that permit the own local network traffic flow.

If the 3rd party software is uninstalled, or disables, make sure Windows native firewall is active .

party like Hello and NetMagic 3rd network managers can block local traffic too.

---------------------------

Stack TCP/IP work should look like.

Right-click on the wireless network connection card, select status, details and see if she got an IP address and the rest of the settings.

http://www.ezlan.NET/Win7/status-NIC.jpg

Description is the data of the card making.

The physical address is MAC of the card number.

The xx must be a number between 0 and 255 (all xx even number).

YY should be between 0 and 255

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The date of the lease must be valid at the present time.

* Note 1. IP that starts with 169.xxx.xxx.xxx isn't valid functional IP.

* Note 2. There could be an IPv6 entries too. However, they are not functional for Internet or LAN traffic. They are necessary for Win 7 homegroup special configuration.

---------------------------------------------------

A message in the small window that says connected wireless doesn't means that you are really a valid functional connection.

Above everything is OK, you must be able to connect to the router.

Connection to the router means that you can enter the IP of the router base in an address bar in one go, being able to connect and configure the router menus see.

If it doesn't connect to the router, journal newspaper from any computer that can connect to the router wirelessly with a wire, disable wireless security, make sure that the wireless SSID broadcast is enabled and try to connect with no. wireless security.

Enable security wireless after you eat to make a functional connection.

Jack-MVP Windows Networking. WWW.EZLAN.NET

Socket RAW InputStream.availalble () in stream wireless network always 0?

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