Big bug in Tethering components !

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Big bug in Tethering components  !

I've installed VirtualBox on my PC, so I have 2 IP address:
192.168.0.54 on my Wifi adapter
192.168.56.1 on the "VirtualBox Host-Only Network" adapter.

when I start the PhotoWall client on Android it broadcast an UDP message: hello ! I'm 192.168.0.27 on port 2020 !

the Server connect to the client and sends the reply: Your welcome, I'm  192.168.56.1 on port 2020 !

And Android will never connect back to the server !

Comments

  1. Eli MJuly 28, 2015 at 8:03 AM

    Your two IPs are on different subnets. Check the section called "Connecting to Applications Outside Your Subnet". http://docwiki.embarcadero.com/RADStudio/XE8/en/Connecting_to_Remote_Applications_Using_App_Tethering

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  2. Paul TOTHJuly 28, 2015 at 8:41 AM

    Eli M no, 192.168.0.54 and 192.168.0.27 are on the same network, but the Manager send a wrong address to the client because it just peek a random one.

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  3. Milan VydarenyJuly 28, 2015 at 9:03 AM

    Possibly subnet mask problems on the server?

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  4. Paul TOTHJuly 28, 2015 at 9:09 AM

    no, it is definitely a bug, my PC has 2 adapter and 2 addresses with 2 subnet mask.
    tcpview shows that the binding is made on INADDR_ANY, but when Android broadcasts a message from the 192.168.0.x subnet, the server should send it's address on this subnet, not the other.

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  5. Dany MarmurJuly 28, 2015 at 9:11 AM

    Just looking at this (havent used those thigies yet) i think you found a bug or deficit. All serious servercomponents i have used have a binding property for the case when you have two cards.

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  6. Gustav SchubertJuly 28, 2015 at 10:02 AM

    This problem is encountered quite often. For example, I needed to enable Hyper-V so that I can debug Windows Store Apps and Windows Phone Apps. (Since then I have the two adapters.)

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  7. Jeroen Wiert PluimersJuly 29, 2015 at 8:56 AM

    Oh the virtues of replying who you're really connected to...

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  8. Paul TOTHJuly 29, 2015 at 9:18 AM

    In fact, I've made my own Discovery component (I've asked about Android UDP broadcast some time ago), and to handle multiple adapters, I create a socket per local address and broadcasts each network separately, that works very well.

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