Android :: How To Receive Multicast Packets?
Jul 5, 2010
I'm trying to receive data from a multicast address, but the call to MulticastSocket.receive() blocks until a timeout takes place.I did some network sniffing and found out that my device (and the emulator) never send a MulticastSocket.joinGroup request.I tried running the same Java code from my PC as a standalone application and it worked well. Could it be that the Android platform blocks IGMP join requests?Has anyone succeeded with Multicast on Android before?My manifest file contains the following permission:I am running my application on 2.1 (Both emulator & device).Any ideas anyone?
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May 17, 2009
I am trying to using UPnP on android. I can send multicast packets out, but I can not receive any multicast packets from other devices.There is a test program. http://www.zippyshare.com/v/75729607/file.html. Can any one help me to check what problem is?
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Oct 8, 2010
i am developing an app that will control a multi-room audio system. I have implimented the following, which works fine on my own network at home (cable modem and D-Link DIR 855 router), but does not work on the office DSL Motorola modem/router. Our iPhone app and our Pronto ProntoScript app work at both locations, so I know that the multicasts are being sent properly. Any ideas?
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Oct 29, 2013
I've just bought a great Bluetooth Speaker to use with my Nexus 4 and it works great. Because it was fairly cheap I went and got another in the hopes that I could connect both speakers to my N4 and output audio simultaneously to both speakers at the same time. I quickly discovered this isn't currently "working" or even possible.
After a lot of Googling, I found an app on the Play store that supposedly let me connect both at the same time but it doesn't output audio to both speakers (I get "static" from the second one). There are also conflicting opinions about whether this is even possible with the current Bluetooth spec although it does mention multicast support and all I could find are various workarounds that involved using a secondary bluetooth transmitter etc.
Any software/hack (root needed or otherwise) that would allow configuring audio to be streamed/output to two connected bluetooth speakers simultaneously? Others have suggested it for use with bluetooth headsets.
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Jul 19, 2010
I'm pretty sure no one but me is using UDP broadcasts but in the rare chance that someone is - has any experienced this? I use UDP broadcast to do LAN multiplayer games - it's how clients discover hosts of games.The EVO can't ever see the games when all my other phones can.
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Nov 17, 2009
From a remote machine we are sending some UDP packets to our Android emulator. We are able to see the UDP packets reaching the host machine, but not able to reach the emulator, In Wireshark we are getting "Destination port unreachable" The port we are using is:49152 and static ip at both ends.Is this port supported by android emulator? What is the solution to get UDP packets to be able to reach till the emulator?
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Oct 26, 2009
The idea is to allow users to download a skin packet from the android market and be able to change the skin via the main application.I assume this skin pack would contain only the layouts and res names that I would want to overwrite from the main application. How could I approach such project?
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Mar 24, 2010
I'm trying to use wireshark to capture some HTTP packets exchanged between the emulator and a website. However, even though I can see the web content on the emulator browser, wireshark does not display any HTTP packets exchanged between the emulator and the website. Why is this?
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Jun 23, 2010
Considering writing a wifi cracking (wep, wpa) auditing tool for the android platform, but I am wondering if it is possible to do without a rooted phone.
I had thought it would be impossible to run on an unrooted phone due to the phones wifi chip ignoring packets not addressed to the phone. That is, without the ability to set the wifi chip to monitor mode many of these attacks wont work. I was surprised to learn that android supports multicast packets. That is, android phones can be set to receive packets not addressed to them.
My questions are: Does having a multicast lock mean I can receive all packets broadcast, or does it only apply to packets with a multicast flag (if such a thing exists)?
Is there a difference between monitor mode and multicast? Does the android api have a system for switching channels?
More generally I'm curious: Is anyone familar with other wifi cracking projects running on android (google searches turned up very little)?
What difficulties am I likely to run into?
This question is related to SO question Is there anyway to put Android WIFI (droid handset) into permiscuous monitoring mode?
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May 27, 2010
I know that the apps receive a ACTION_SHUTDOWN broadcast event when the device is shutting down.
When an application receives the shutdown, is there still an opportunity to send data packets out, or does android block such attempts(or does the platform tear down the network stack before it can go out).
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Jul 2, 2010
I'm trying to find out how use android multicastlock for capturing packets not addressed to device. As i understand SDK, i can capture them.
Can you show how capture them, or advice how use multicast lock.
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Sep 16, 2009
1. I have a c lib which will send & receive multicast package, if I lauch it in native ap, everything is OK, but if lauched through jni ,so it run in dalvik env, it can not receive multicast, i think is may be disabled by dalvik, is there any permission can enable this feature?
2. In this lib i will make some callback of function in dalvik class. according to tranditional method which can run under JDK1.5 & 1.6 as follow: (I make it under source code env not NDK)
In some initialization method save jvm pointer
CODE:...........
it seems AttachCurrentThread not failed but env not correct.
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Feb 22, 2010
If i turn this off while I am home or in my dorm and connected to wi-fi
can I
1) Receive Texts
2)Send/Receive Pics
3)Make Calls?
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Jun 21, 2010
I'm considering getting a HTC Desire to replace my Nokia N95. One of the features I use a lot is the Nokia PC Suite's ability to send/receive SMS using my PC. I sometimes send upwards of 1000 SMS's per month, and can't see myself enjoying any phone which doesn't have this software.
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Apr 28, 2010
Is there an app to send and receive (in sms both ways)? All the phone numbers that I text (or texted to me) appear on our family bill. Since there seems to be no way to stop that; I am trying to find a simple sms to sms app.. a paid one without ads that is as simple to use as 'regular' texting. I also assume a paid app will bypass the fear of me being a spammer since they will have all my information.
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Apr 4, 2009
Does any G1 program do FAXs? I need to send a FAX. I would think I should be able to send and recieve a FAX on my G1. All I need is the program...
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May 15, 2010
When someone sends me a text that has movement it comes to me as a gif? Why is that?
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Apr 8, 2010
Does anyone know of an app (for hero) that would allow me to make and receive calls on my desktop when my phone is plugged in via usb? I have desktopSMS going and was wondering if there is something similar for calls. I have unlimited voice/text so i don't need anything to avoid that, my problem is that where i sit in the office i can't get a signal on the phone, but plugged in via usb my phone can sit on the window sill and get reception so it would be handy not to have to run across the room every time it rings! i tried searching the forums for this but on and pc are too short to search so you can imagine how many hits for "receive calls" there were!
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Jul 30, 2010
As the title says, for whatever reason I cannot seem to receive MMS message on my phone (HTC Aria, AT&T). I've tried the default messaging app, Handcent, and chompSMS so far, and none of them seem to work. Is there anyway to fix this? Whenever I get such a message it just downloads for an indefinite amount of time. I think I read somewhere that there may be some kind of bug on the phone that causes this, but I'm not to sure about this/want confirmation if such a thing exists.
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Sep 22, 2009
I'm not able to receive MMS anymore. I've check my APN lot of times and it doesn't seem to be the issue. I looked at the log file (logcat - b radio), but I'm not really able to understand the result. If anyone could have a clue about where is my issue in looking at the log, then I'll be very glad. FYI my APN are: (for wap) APN: wapsfr Proxy: 195.115.25.129 port: 8080 MCC: 208 MNC: 10 Protocole: Wap 2.0 APN Type : default MMS: APN : mmssfr MMSC : http://mms1 Proxy MMS : 10.151.0.1 Port MMS : 8080 MCC : 208 MNC : 10 Protocole: Wap 2.0 APN Type : mms. Here's the log when I try to download a MMS: D/RILJ ( 126): [0463]> OPERATOR D/RILJ ( 126): [0464]> GPRS_REGISTRATION_STATE D/RILJ ( 126): [0463]< OPERATOR {F SFR, (N/A), 20810, 5} D/RILJ......
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Jul 12, 2010
Is there an app that allows you to receive a fax sent to your cell#? Or even send by taking a photo and sending?
I know faxes are ancient now, but the business world can't seem to get past them. I generally scan and email, but some of our vendors still fax.
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Mar 20, 2010
I am running Handcent on my LG EVE and just noticed that i can't seem to receive MMS?
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Aug 24, 2012
I am connecting to a server on my network written in C#. The data sent from the android device is received by the server and a reply is succesfully sent but the android code timesout and never gets the return data.I have tested that the C# server can communicate and reply with a C# client.
I have studied the network traffic using Wireshark when using both the C# server-android client and C# server-C# client and it appears that the android device acknowledges(ACK) the reply data but my code never recieves it.
I have the code running in a thread so running it on Android 4.0 doesn't error out but I have tried running it on Android 2.2 with exactly the same behaviour(or lack of it). Also I have run it on 2 different android devices.
(AndroidManifest.xml)
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
(My Code)
[code]...
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Jan 6, 2010
I am using the mail app on the eris. I can recieve my emails but they will not sync. when i open up the email domain and sign in my emails that i have deleted or moved are unchanged.
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Jun 12, 2009
can't seem to send or receive vCard over sms?
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Dec 14, 2009
I am writing a UDP client/server application. The android phone (client) can send and receive UDP packets if connected to wi-fi. When using mobile network (2G), however, it can send packets to the server, but cannot receive packets. The server does receive and send back packets in all cases. The client side code is as follows: byte[] buf = new byte[4096];DatagramPacket packet = new DatagramPacket(buf, buf.length);while (true) {packet.setData(buf); socket.receive(packet);
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Jun 9, 2010
Is it possible to receive MMS programmatically in Android. couldn't find a way to achieve this this. i have successfully on receiving sms messages in android.code...
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Nov 24, 2010
how can I register my application so that when I receive a sms my app appears in dialog Complete action using. I have put in an intent code
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<action android:name="android.intent.action.SENDTO"/>
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.BROWSABLE"/>
<data android:scheme="sms"/>
</intent-filter>
but it's not working... should I use receiver? Note that the activity in which I've inserted this code is not main activity.
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Mar 23, 2009
I want to listen to outgoing call. Below is our manifest.xml and Listen.java. But when a outgoing call is doing, I got the following waring, and the receiver got no response. Would you like to help me out. Thank you very much.
03-23 16:05:09.227: WARN/ActivityManager(79): Permission Denial: broadcasting Intent { action=android.intent.action.NEW_OUTGOING_CALL (has extras) } from com.android.phone (pid=193, uid=1001) requires null due to receiver com.android.lianyun/com.android.lianyun.Listen import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.util.Log;
Code...
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Sep 1, 2009
My current problem is that I don't receive an intent. I have a BroadcastReceiver and defined in the AndroidManifest.xml file that it also should receive intents with these actions.
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