Android create a L2TP/IPSEC connection - android

Hello Android Community!
How can I setup a L2TP/IPSEC connection on android using this IPSEC/IKEV2 library ?
I didn't found any documentation about it. Also I am only able to setup a VPN connection using Open VPN but I want a solution for IPSEC protocol.There are many questions regarding setting up the IPSEC VPN protocol but there is no solution.

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OpenConnect VpnService for Android

As I know there no API to support PPTP or L2TP connections inside android, so I switched to using openconnect (ocserv).
Is there any VpnService or API to connect to ocserv using Android?
I tried the sample app (ics-openconnect) but the source code is deprecated and complicated to integrate.
Please don't suggest to switch using OpenVPN ;))

Create L2TP/IPSec client android

I need to create a L2TP/IPSec client application android. I read the android VPN documentation. It states some legacy API for that. But I could not find such one. Also provided example app for VPN client does not work since it was built for a very old version. Android has built-in support on this VPN protocol. This answer says no official API. However, I have seen applications which support IPsec directly. how to call it in VpnService class as stated in the official documentation. Also if I need to add custom VPN protocol how to run and get those interfaces from java code?

Connecting to VPN server in Android

I have been working on developing an android client for connecting to a VPN server. I have these concepts for now
Android version 14+ provide an API named VpnService.
You have to implement your own protocols even common protocols like
PPTP,L2TP, IKEV2 etc.
Now I am supposed to connect VPN service via ikev2 protocol. Where i can find the
Manual implementation of ikev2 protocol.
How can I integrate it in android studio.
I have gone through many
blogs and github codes but none of them seems to solve my issue. Thanx!

Native Android VPN programmatically

Variants of this question exist, but I can't seem to understand something.
If you read at the end of the features in ICS / 4.0, there is mention of
Enterprises can also take advantage of a standard VPN client built into the platform that provides access to L2TP and IPSec protocols.
My assumption here is that since it's not under the "Developer" section, that we didn't get a developer API access other than the VpnService API. I've looked at ToyVPN and this is just useless, since I need a REAL IPSec IKEv1 XAuth connection to connect to enterprise firewalls.
I've found several solutions which require root and VPNCilla which apparently doesn't though I haven't been able to successfully have it establish the connection.
Does this mean that there really is no way to PROGRAMMATICALLY create a profile for or connect to an IPSec IKEv1 XAuth gateway/firewall unless we implement the protocol in Java or using the NDK (like StrongSwan did with IKEv2) ?
It's extremely unlikely that there is a way to create a VPN profile without root or system app privileges. You can take a look at how this is implemented in AOSP settings here.

How to do socket programming in android

I want to create the android application in which i send the data from the android device to desktop application using wifi devices. I am not confirmed but i think that it can be possible with the socket programming. so please help me to give guidence for how to send data from android device to desktop using WIFI.
I think it's possible to use standard java socket in android (using javax.net.SocketFactory).
I'm not very experimented with java socket, but there is some documentation about that when searching it in google.
here are some examples of socket programming in android, hope they help.
UDP: http://www.anddev.org/viewtopic.php?t=280
TCP: http://www.anddev.org/general-f3/socket-programming-t325.html#wrap

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