User agent: use device name and version as user agent

Classes/LinphoneManager.m

@@ -1293,10 +1293,10 @@ static LinphoneCoreVTable linphonec_vtable = {.show = NULL,
 	const char *lRootCa =
 		[[LinphoneManager bundleFile:@"rootca.pem"] cStringUsingEncoding:[NSString defaultCStringEncoding]];
 
-	linphone_core_set_user_agent(theLinphoneCore,
-								 [[[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleDisplayName"]
-									 stringByAppendingString:@"Iphone"] UTF8String],
-								 LINPHONE_IOS_VERSION);
+	NSString *device = [NSString
+		stringWithFormat:@"%@_%@_iOS%@", [NSBundle.mainBundle objectForInfoDictionaryKey:@"CFBundleDisplayName"],
+						 [LinphoneUtils deviceName], UIDevice.currentDevice.systemVersion];
+	linphone_core_set_user_agent(theLinphoneCore, device.UTF8String, LINPHONE_IOS_VERSION);
 
 	_contactSipField = [self lpConfigStringForKey:@"contact_im_type_value" withDefault:@"SIP"];
 

Classes/Utils/Utils.h

@@ -46,6 +46,7 @@ void linphone_iphone_log_handler(int lev, const char *fmt, va_list args);
 + (void)buttonFixStatesForTabs:(UIButton*)button;
 + (void)buttonMultiViewAddAttributes:(NSMutableDictionary*)attributes button:(UIButton*)button;
 + (void)buttonMultiViewApplyAttributes:(NSDictionary*)attributes button:(UIButton*)button;
++ (NSString *)deviceName;
 
 @end
 

Classes/Utils/Utils.m

@@ -20,6 +20,7 @@
 #import "Utils.h"
 #include "linphone/linphonecore.h"
 #import <CommonCrypto/CommonDigest.h>
+#import <sys/utsname.h>
 
 @implementation LinphoneLogger
 
@@ -298,6 +299,13 @@ void linphone_iphone_log_handler(int lev, const char *fmt, va_list args) {
 	return nil;
 }
 
++ (NSString *)deviceName {
+	struct utsname systemInfo;
+	uname(&systemInfo);
+
+	return [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
+}
+
 @end
 
 @implementation NSNumber (HumanReadableSize)