Does anyone know how to setup an IP address in iOs programmatically? It is really easy to do manually, just go to settings and configure the network. However, I want to do this inside a program, to connect to a WiFi network that do not have a DHCP server. Any pointers would help.
Update: This does not seem to be possible. Any suggestion on what I should do instead? The app needs to connect to a network that does not have a DHCP server.
I very much suspect this isn't possible without the use of private APIs, as otherwise it would be possible for a malicious app to effectively "break" the user's network settings.
You can't do it within the Apple guidelines. It's probably a private API call. If you're talking about an app for jailbroken stuff, it might be a different store.
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I would like to make an application for iOS devices that would communicate with a special type of remote device using HTTP POST requests. The problem is that this device would actually act in the role of a client, while iOS device has to be the server accepting the requests. The next problem, host name and port has to be configured statically at the device sending the requests.
While I'm aware it's possible to give it a try using Dynamic DNS services and UPnP/IGD or NAT-PMP to overcome the problem with iOS device being behind the NAT router, I was wondering whether using Bonjour could simplify the problem in some way. I'm quite a newbie in networking so I'm looking for the direction and want to avoid research of Bonjour if it's not going to bring me anything.
Any other idea of how to solve the problem is appreciated as well.
I had a think about this. IMHO you can't guarantee you'll always be able to expose an iOS based service over a WAN (although it's possible) so this isn't practical.
The best solution I suggest is using uPNP to open the device behind a router to the outside world, then have it send an iOS push notification to the iPhone with the details (hostname, ip, port, etc).
The iPhone would then would then have to set up some kind of persistent connection with the firewalled device to receive data.
Bonjour is a good system to discover and connect to services/clients, but only on your local network. I don't think it is a good idea to try it over the internet.
are there any services running by default on an iphone that would let another ip address communicate with it if the iphone's ip is known?
Yes, technically, you can. There are a couple of issues though:
Mobile IP addresses usually change
When the phone is in sleep mode, its network interface is probably not reachable.
So I don't think you can rely on that for initiating a communication with the phone.
There aren't many options out of the box on a non jail-broken phone. However, you can write your own client application that runs on the phone. It accepts or initiates the remote connection.
And in that case, the protocol is entirely up to you.
If you jailbreak your phone, you can install the OpenSSH package and have SSH and SFTP access to your phone.
I don't know exactly what you want to do with your app, but you can consider create a thread detached from the main one (using gcd) and use it to send/receive informations from a server using JSON objects for example. Sure you can use sockets and write a client or something like that.
I suggested a new thread because you can put it running forever (on a enterprise app, I don't know if Apple will approve a thread running on an App for AppStore).
I had to develop an app with a consistent client/server relationship and it was the way I got it working.
as topic, I want establish VPN connection in iPhone app, if it possible? but seem not public API for this purpose ...
anyone give tip, thanks.
I've seen RDP over VPN using the iPhone (though I haven't set it up myself) and Cisco indicates support for VPN connections from iPhone on their ASA series:
And Apple provides instructions.
So VPN connections using a variety of protocols are definitely possible. However, initiating the connection programmatically is a different matter.
I did some additional reading (including old posts here on SO like VPN connection with Objective-C).
The more that I think about it, allowing an application to quietly initiate a VPN connection could pose a big security risk. I would be surprised to see API support for it.
However, creating your own VPN client on the iPhone (though MUCH more difficult than making an API call) is still theoretically possible.
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.
Could someone suggest a tutorial/sample on how an Iphone application can send data to a remote server using Carrier Data Network only? In other words is there a way an application can programmatically force to enable Carrier Data Network communication, use it to send its request to the remote server and switch it back to user specific communication settings.
I am taking this approach because my application needs to send user's personal info to my server and sending it over public WiFi does not sound right. Please let me know if there is better approach to it....
Thanks
Since no one's writing a full answer ...
I don't know if it's possible to detect CDN vs Wi-Fi, although at some level it must be because the App Store is capable of determining such to prevent large CDN downloads. Of course, the App Store app has access to the private APIs; this functionality may not be exposed publicly. (I don't know if that is the case or not, but be sure you do not use private APIs for your app; the store won't accept it.)
That said, think about the use case of your app, and the marketplace. The iPhone OS and the iPhone App Store are more than just the phones themselves -- they're the iPhone and iPod Touch devices. iPod Touches do not have a CDN; they're Wi-Fi only for connectivity.
As Marc W said in a comment, not all Wi-Fi is public, not all public Wi-Fi is free, and you will likely upset a significant portion of your audience -- people (presumably and hopefully) giving you money.
A better solution would be to use SSL to provide encryption of the private data during transport. This is widely available, works over CDN or Wi-Fi, and provides all the security you should need.
If you look at the Apple Reachability example code, you can test for how you would access a host - however I agree with the other posters that you should consider encrypting your data and let your user's determine how they want to connect to the Internet, and not force one form of connection.
-t