I'm trying to do a sort of network discovery using the iPhone.
By that I mean I want for example a list of all the computers in the LAN that the iPhone is connected by wireless, and the list should contain the ip's and MAC addresses of any powered on computers that may be in the LAN.
What's the best approach on this?
(any code would be appreciated)
Thanks
Consider trying to implement netstat on the device. You'll want to use reachability to ensure that you're only checking when the device is on a LAN.
Depending on the network, consider using Apple's bonjour service to discover services running on networked computers.
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/NetServices/Introduction.html
Like Jeremy said above, you could look into using Bonjour. I'm not too familiar with Bonjour, so I'm not sure if it will pick up on every machine on a LAN, or if it will only pick up devices that have published services via Bonjour, like printer sharing or SMB file shares.
That said, it's probably a good place to get started, as the Apple docs have some good code samples. In particular, you may be interested in the NSNetServices and CFNetServices Programming Guide: CFNetServices - Browsing For Services article. There's a code sample there ;-)
Related
I have written a VST/AU/RTAS synthesiser plugin for OSX and Windows that also has an iPhone equivalent. I would like to allow the two to communicate with each other over a local area network so that the iPhone app can be used to send MIDI controller data to the plugin. I plan to create a MIDI source on the iPhone and publish it as a Bonjour service so that the plugin running on OSX or Windows can find it and receive midi from it.
I have a couple of questions to ask about this:
1) Do I actually have to publish the MIDI source as a Bonjour service or does a coremidi host (running on iPhone) automatically publish itself?
2) Are there any code examples available that show how to do this sort of thing?
I have seen the following post but the answer to this only covers the client side, finding a Bonjour service but not the publishing side, and it transmits MIDI via OSC, and it only covers OSX but not Windows (I know, I'm not asking much! ;) )
How to send MIDI or OSC signals to a Mac application from my iOS application?
Cheers,
John.
AFAIK you'll have to publish the service yourself. NSNetService and NSNetServiceBrowser are the classes you need. Check out the companion guide. I found this article on Cocoa for Scientists particularly helpful in getting started. Both have some decent code samples. The Bonjour Browser is useful for testing.
The list of bonjour service types already has
apple-midi
and
imidi
But I think it's best to make up your own application-specific type name unless your app is plug-compatible with one of these services.
I'm trying to write a simple chat application for the iPhone (as an experiment). Is there a simple way for two devices to discover each others' IP addresses, and given the addresses is there a simple API or protocol that would let me send text messages back and forth?
I've investigated SIP (specifically Sofia and eXosip), but these tools exist as C libraries and are beyond my current ability to port them to the iPhone.
Update: I'm trying to connect two devices over the Internet (i.e. not over Bluetooth or a local wireless network, which is what GameKit does).
You're going to need a server that provides the match making service. Game Center makes this pretty easy, but your users will have to have Game Center accounts.
Alternatively, you can set up an XMPP (formerly Jabber, it's what powers Google Chat) server (I've never done this, but there are several available) and use the XMPP Framework for Cocoa. There are instructions for using it in iPhone apps here.
I'm sure there are other chat servers and client source also available. IRC and Mobile Colloquy come to mind.
Finally, you could write your own server using your favorite server language / framework. This isn't too hard (I've done it myself), but it's far from what I'd call simple, and I wouldn't use it for a production system.
There is support for exactly this kind of ad-hoc peer-to-peer networking in GameKit. Have a look at the second half of the GameKit documentation for details:
http://developer.apple.com/library/ios/#documentation/...
NSNetService is a good option.
Take a look at WebRTC Datachannels. WebRTC is a newer option with native iOS support a standard that is still being finalized, but it is more flexible should the iOS app need to communicate with browser or even android peers
So I have a project I am working on, and I would basically like to send a basic yes/no command from the iPhone to a wifi enabled device that is also connectedto the network on the same router. This other device is not a computer, so I am wondering if I can still use Bonjour? In order to use Bonjour, do both of the communicating devices need to have some sort of a script installed and running that is allowing them to communicate? What would be the best way to connect to this device that is connected to the router, and then to send information/commands to it? I could really use some help finding a direction, because once I identify which tools I need to use, I can research them out and get it done (maybe). If anyone could offer any insight/suggestions whatsoever, it would be greatly appreciated!! Thanks in advance
Bonjour is a local service discovery protocol based on multicast DNS. Even if your device supports it you still need some piece of software on the device to listen to your commands.
I am developing an application which identifies(find) all the systems connected in same network/LAN to share the data.
could please share with me how to identify(find) the systems which are connected in same network/LAN.
thanks in advance.
When you say all systems, I assume you mean all instances of your application? If so then the correct solution is to use Bonjour. Documentation on how to use it can be found here. Note that your app needs to be actively running on all the devices that you are trying to discover, since the iPhone does not support background apps.
If you are just talking about finding all other devices in the area then you need to resort to techniques like port scanning.
The iPhone settings have an IP address for the device when it is connected to a wifi network. Is it possible to get this IP address and establish a connection between a desktop computer (on the same network) and the iPhone?
I want to be able to transfer files between the iPhone and the desktop computer. Some apps like the "Files" and "FourTrack" apps do this.
Can someone please guide me to where I can start?
Thanks a lot for any headsup
Google for SIOCGIFCONF and you'll find a bunch of example code in C for getting all your IP addresses. Once you've enumerated your devices, on iPhone they are always in the following order: Loopback, WiFi, WAN.
Once you have that, you can implement a web server with CocoaHttpServer pretty easily. You'll have to hack it to add directory listings and the like, but it's not too hard. It's not trivial, but it's not too bad.
I think you already answered your question... you have to download an app to do this. I use "Air Sharing" and it works fine.