I am working on an iPhone application and would really like to determine if the device is roaming so that I can intelligently avoid costing my users expensive connections if out of their home network.
The application I am writing is for jailbroken phones, however I would prefer to use standard SDKs if possible.
Here is what I've already found:
1. Apple SDKs:
In the apple documentation, I found the promise in Apple's SCNetworkReachability API. The API provides access to such things as whether you are on a WIFI or a cell phone network, whether a network connection is currently established, etc. However searching the SCNetworkReachability API reference pdf for 'roam' or 'roaming' both turn up nil. So does their sample code.
2. Grep of a Jailbroken iPhone FS:
The preferences -> general -> networking tab is where users can turn on or off their roaming. Looking in the plist file for this ("/Applications/Preferences/Network.plist") I was able to find the following references:
PostNotification = "com.apple.commcenter.InternationalRoamingEDGE.changed";
cell = PSSwitchCell;
default = 1;
defaults = "com.apple.commcenter";
key = InternationalRoamingEDGE;
label = "EDGE_ROAMING_TOGGLE";
requiredCapabilities = (
telephony
);
This is certainly a lead, as it appears I can sign up for notifications that the user has changed the InternationalRoaming settings. Still, I'm not certain how to turn this into the knowledge that they are in fact, presently roaming.
3. Check the class dumped sources of SpringBoard:
I've dumped the classes of SpringBoard using class-dump. I was unable to find any references to 'roam' or 'roaming'
4. Obviously I started by checking at SO for this:
Couldn't find anything related.
Further steps: Does anyone have any advice here?
I know this is possible. Apple clearly has made it very difficult to find however. I highly doubt this is possible without using a private framework. (such as CoreTelephony). As this is a jailbroken app, I may resort to screen-scraping the the carrier name with injected code in the SpringBoard, but I would really rather prefer not to go that route. Any advice much appreciated. Thanks.
There is! It's not documented at all, and I highly doubt this would work on a non-jailbroken phone (as it requires using files not in the sandbox). However, here is how it is done.
The iPhone file system keeps two softlinks:
static NSString *carrierPListSymLinkPath = #"/var/mobile/Library/Preferences/com.apple.carrier.plist";
static NSString *operatorPListSymLinkPath = #"/var/mobile/Library/Preferences/com.apple.operator.plist";
when these links are pointing at the same file, the telephone is not roaming. When pointing at different files, the telephone is romaing.
Simplified code (no error checking, etc):
- (BOOL)isRoaming
{
NSFileManager *fm = [NSFileManager defaultManager];
NSError *error;
NSString *carrierPListPath = [fm destinationOfSymbolicLinkAtPath:carrierPListSymLinkPath error:&error];
NSString *operatorPListPath = [fm destinationOfSymbolicLinkAtPath:operatorPListSymLinkPath error:&error];
return (![operatorPListPath isEqualToString:carrierPListPath]);
}
the solution of the symlinks are not the only way to do it but definitely it is the best. As I just realized, the Strings returned contains the MCC and MNC codes of the operator and carrier!!! Even the core telephony framework is not able to retrieve those informations about the operator your iPhone is attached when in roaming.
Logs:
carrier: /System/Library/Carrier Bundles/iPhone/72410/carrier.plist
operator: /System/Library/Carrier Bundles/iPhone/20810/carrier.plist
As you can see, the carrier (original cellular provider) line contains the file inside the "folder" 72410, which means MCC 724 (Brazil) and MNC 10 (VIVO).
The operator (actually the one my cell phone is attached now - i'm in roaming) is inside the folder 20810, which means MCC 208 (France) and MNC 10 (SFR).
By the way, I'm using iPhone 4 with iOS5.
On a non-jailbreak device you can use third party services like http://ipinfo.io (my own service) to find out the current country of even carrier code based on the device's IP address, and you can then compare that to the CTCarrier details to determine if the device is roaming. Here's the standard ipinfo.io API response:
$ curl ipinfo.io/24.32.148.1
{
"ip": "24.32.148.1",
"hostname": "doc-24-32-148-1.pecos.tx.cebridge.net",
"city": "Pecos",
"region": "Texas",
"country": "US",
"loc": "31.3086,-103.5892",
"org": "AS7018 AT&T Services, Inc.",
"postal": "79772"
}
Custom packages are available that also include the mnc/mcc details of mobile IPs though. See http://ipinfo.io/developers for details.
Related
Well, I would just like to know is it possible to know the path of the app? I used the following code
[NSBundle mainBundle] executablePath];
It retrieved the below value. That is correct.
/var/mobile/Applications/FBE187F1-256D-495D-852B-53AECD4F4C23/Test_Data_Fetch.app
And I would like to know, is it possible to check the existence of other app? The problem is FBE187F1-256D-495D-852B-53AECD4F4C23 this particular directory value changes for every app. I would really like to know if it is possible!!
Your application cannot access anything outside sandbox so you can't search file system directly for a given application.
One possible solution is if application you are interested in handles custom url scheme, then you can check if that url scheme can be opened:
NSURL *url = [NSURL URLWithString:customScheme];
BOOL appProbablyExists = [[UIApplication sharedApplication] canOpenURL:url];
Update: This article describes several possible approaches, but it seems there's no definite way to get list of installed applications using public API
Finally, using the Mac program iExplorer we can look at any App’s data. This is not related to my question, though it is quiet useful!! Was able to achieve my goal!! :]
I'm attempting to create an iOS 5 app with some very basic FTP functionality and need some guidance. It will be connecting to a device on a local network and performing read/write actions with .dat/txt files. I've done some searching for the past few days and have seen various recommendations but nothing simple enough that I can pick up and quickly modify for my personal use.
My questions are these:
Are there any tutorials/sample code that you could recommend to me?
What frameworks and classes should I be working with for basic read/write operations?
Lastly, I should mention that I have given a considerable amount of time to analyzing the SimpleFTPSample from Apple but the sample code is giving "Connection Failure" and "Stream Open Error" notices for each example, so I'm a bit wary of its usefulness.
Forgive me if this has been answered elsewhere. All of the related posts have pieces of the answer I need, but not the whole thing. Thank you in advance!
EDIT for clarity: A well-defined example or step-by-step tutorial is what I would really like. My own Google searches have turned up nothing and I am desperately in need of some guidance here.
UPDATE:
I posted this question long ago but have continued using the FTPHelper mentioned in the accepted answer. I recently brushed the dust off the old project and realized there was a minor memory leak in FTPHelper's fetch function that can be an app-killer if called repeatedly. If anybdy stumbles across this question and chooses to use FTPHelper, be sure to add the CFRelease line seen in the code below.
- (void) fetch: (NSString *) anItem
{
if (!self.uname || !self.pword) COMPLAIN_AND_BAIL(#"Please set user name and password first");
if (!self.urlString) COMPLAIN_AND_BAIL(#"Please set URL string first");
NSString *ftpRequest = [NSString stringWithFormat:#"%#/%#", self.urlString, [anItem stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
/* CFShow(ftpRequest); */
NSString *writepath = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents"];
self.filePath = [writepath stringByAppendingPathComponent:anItem];
CFURLRef writeURL = CFURLCreateFromFileSystemRepresentation (NULL, (const UInt8 *) [writepath UTF8String], [writepath length], NO);
MySimpleDownload((CFStringRef)ftpRequest, writeURL, (CFStringRef) self.uname, (CFStringRef)self.pword);
CFRelease(writeURL);//ADD THIS LINE TO FIX MEMORY LEAK
}
The SimpleFTPSample app is running perfect, probably there is an issue that you can't see. What I can recommend you (except Apple's example) is to check THIS example which contains a helper class for all basic FTP operations. One thing to be aware of is iOS 5 ARC. Both Apple's example and the one I linked are for older iOS versions.
There are basically 2 ways to use them in iOS 5 - by telling the compiler to not use ARC by adding -fno-objc-arc flag in [Your project] -> TARGETS -> [Your app] -> Build Phases -> Compile Sources -> [Your file], or by using the built-in tool in Xcode for converting to ARC.
I personally have tested only the first method and it works for me.
If this does not help you I can write an example, but unfortunately today I am very busy.
UPDATED:
The basic mechanism is to use [FTPHelper list:THE_FTP_URL] to list the content of a folder, then create one list with the content and depending on the type (file or folder) download using [FTPHelper download: THE_FTP_URL_WITH_THE_FILENAME_FROM_LISTING]. From here you have to implement
- (void) downloadFinished
{
//do the reading depending on the file type
NSData *data = [NSData dataWithContentsOfFile:[FTPHelper sharedInstance].filePath];
}
The uploading is achieved in a similar way - using [FTPHelper upload:FILE_TO_UPLOAD] with a file from the filesystem.
There are many libraries which you could use and they are working great. :)
For example:
http://www.chilkatsoft.com/ftp-objc.asp
http://code.google.com/p/ios-ftp-server/
I recommend using them, because coding one by yourself would take a lot of time :)
One thing to remember, as o15a3d4l11s2 said, is to be aware of ARC. If you use it don't forget to add build flags to libraries which aren't ARC.
The application that I'm working on supports 3 languages: English, French and German.
How I can get the current application language (NOT the device language)?
The problem is that I have to get the current language of the application in order to send it with a request to the server and the respond should be in the right language. The device language is useless because if the user switch the os language to Italian, the app is running in English and I need to send english to the server.
Thanks
The accepted answer is a workaround.
Regarding language preferences in the device itself, you have the
[NSLocale preferredLanguages]
which will give you an ordered array of the preferred languages as defined in the system's General Settings.
The Cocoa Touch framework will take this list of preferred languages into account when loading the app's localization resources and filter it according to the translations you provide in the bundle.
This filtered and ordered list of localized languages can be obtained with
[[NSBundle mainBundle] preferredLocalizations]
Your server requests should match the first value in this array or you will have a language mismatch between app and server data.
What i always do:
Add a string entry into the Localizable.strings files.
I always use the key "lang"="de"; (or "lang"="en", etc.).
Then you can use it in your NSURLRequest by adding the language over NSLocalizedString(#"lang", #"")
With that method you have absolute control what is going to be sent to you backend.
You may use the preferredLocalizations method of the NSBundle class:
NSString *currentLocalization = [[[NSBundle mainBundle] preferredLocalizations] objectAtIndex:0];
Since iOS 13 the language can be set for each app individually.
In the session "Creating Great Localized Experiences with Xcode 11" at WWDC19 they showed two options for determining the user settings for the application.
Get the currently running application language:
Bundle.main.preferredLocalizations.first
Get the best language, given an external language code list:
let availableLanguages = Server.requestLanguages()
Bundle.preferredLocalizations(from: availableLanguages).first
The app language will change when the user change the device language and you can get it from the NSUserDefaults (i will show you how if you want to ) unless there are an option to change the language inside the app then you can easy save the current used language and send it to the server when ever you want.
I'm trying to use ABPersonGetCompositeNameFormat() to read the sort order settings for the user's address book. It always returns kABPersonCompositeNameFormatFirstNameFirst regardless of how I configure the "Display Order" preference in the Settings application. The Address Book application changes appropriately when the display order is set to "Last First" but the API call always returns the same value that represents the "First Last" display order. Has anybody else had this problem? I'm running this on an iPhone4 with iOS 4.3.3.
I've just found a solution - ABAddressBookRef has to be obtained (by ABAddressBookCreate) at least once before calling to ABPersonGetCompositeNameFormat(), but there are no mentions about it in the documentation.
ABRecordRef source = ABAddressBookCopyDefaultSource(addressBook);
people = (NSArray*)ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering(addressBook, source, kABPersonSortByLastName);
It helps you.
For a personal project of mine, I'm trying to retrieve iPhone WiFi signal strength. I'm fully aware that this in the land of undocumented goodness, so please refrain from the "No Appstore" answers. :)
Anywho, I've been reading up on previous WiFi Network Scanner Apps (WiFi Stumbler), but I'm afraid most (if not all) reflect outdated SDK documentation. Hopefully, this question will also provide some centralized / insightful material with the most recent iPhone SDK 3.1.2.
Here's my incomplete/not-working code:
.h
void *libHandle;
void *airportHandle;
int (*open)(void *);
int (*bind)(void *, NSString *);
int (*close)(void *);
int (*scan)(void *, NSArray **, void *);
.m
libHandle = dlopen("/System/Library/PrivateFrameworks/MobileWiFi.framework/MobileWiFi",RTLD_LAZY);
open = dlsym(libHandle, "Apple80211Open");
bind = dlsym(libHandle, "Apple80211BindToInterface");
close = dlsym(libHandle, "Apple80211Close");
scan = dlsym(libHandle, "Apple80211Scan");
open(&airportHandle);
bind(airportHandle, #"en0");
NSLog(#"Result %#",libHandle);
When executed on the device, it'll produce my ever-so-favorite...
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
I'm thinking the dynamic loading call, isn't loading anything. The directory: /System/Library/PrivateFrameworks/ only lists a Info.plist file with no binaries or aliases.
Probably doing something terribly wrong (wrong directory?)... appreciate any help!
Also, as a follow up. To extract the WiFi information, it might be done by:
GetInfoCopy = dlsym(libHandle, "Apple80211GetInfoCopy");
And my questions are 1) Has anybody had any luck with this? 2) How do you get a header dump like I would using with class-dump on Objective-C libraries (because MobileWifi is in C)?
For anybody who stumbles upon this question, here's my library to access 802.11 networks. Although Apple claims to deny any applications that use private frameworks, there are several closed-sourced WiFi applications on the AppStore. Use at your own risk.
This library works with iPhone SDK 3.1.2.
SOLStumbler.h
SOLStumbler.m
Use:
SOLStumbler *networksManager = [[SOLStumbler alloc] init];
[networksManager scanNetworks];
Result:
An networks NSDictionary of a info NSDictionary.
Use CFShow to explore the returned pointer containing information. Or call the description method for sample output.
Update as of July 2012 (iOS 5.0)
The code you're trying to use is pretty old. This stuff (e.g. WiFiManager or MobileWiFi) is in a private framework. That means Apple can, and often will, change it or move if from OS version to version.
I ran nm on the MobileWifi framework, and didn't see any of those function names. So, I think that's why your code fails.
$ pwd
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/System/Library/PrivateFrameworks/MobileWiFi.framework
$ nm MobileWiFi | grep 80211
$
I suppose it might be necessary to run nm on the actual device framework, but I didn't waste my time, after looking at this:
Discussion of this framework, and follow-ons.
It looks like you can now find equivalent (?) functions in the IPConfiguration framework. Try this code:
libHandle = dlopen("/System/Library/SystemConfiguration/IPConfiguration.bundle/IPConfiguration", RTLD_LAZY);
I ran it on a jailbroken iOS 5.0.1 phone and it worked (loaded the dylib and found a few of the Apple80211 functions). From that thread I linked to, it looks like you may need to have this installed in /Applications on a jailbroken phone, in order to work fully. Or, possibly have to mess around with adding some entitlements to your sandboxed app.
These Apple80211xxx functions do not exist in MobileWiFi.framework (you can check using the `nm' tool against the SDK binaries).
(Also, it's impossible to dump a C header from binaries because all type information are removed during compilation. You need to reverse engineer it yourself or wait for someone to do so.)
I'm not sure if this would be a problem, but open/close/bind are names that are already in-use (standard C library).
The binary doesn't exist, as it is stored in the dyld shared_cache (dlopen will succeed because the library is technically 'loaded.'); however, I note that you're not checking that any of libHandle, open, close, bind or scan are valid when you retrieve them from the dl* functions.