Auto start not working,of you use Add Amnezia side-by-side with WireGuard

[tomtomclub]

Describe the bug
A clear and concise description of what the bug is.

Smartphone (please complete the following information):

• Device: nvidia shild pro 64 bit
• Android Version: [droid 14/
• App Version [e.g. prei release today

To Reproduce
Steps to reproduce the behavior:

1. Go to Add Amnezia side-by-side with WireGuard
2. Click on '....'
3. Scroll down to auto starten'
4. Reboot and is not common on

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots (Only if necessary)

Additional context
Add any other context about the problem here.

[zaneschepke]

Hello! Can you describe more what is happening? There are some comments from other users in #149 about some values that may need to be switched around.

[tomtomclub]

Okay, I'm going to adjust some parameters and see what happens

[tomtomclub]

It Works on mobile, not on nvidia shield, I'll test it thoroughly, don't worry

[GrumpyGiuseppe]

There is a bug in the wg tunnel amnezia config.
I tested it only with my standard wg server and changed server config.

This is my amnezia config:
Jc = 100
Jmin = 10
Jmax = 1000
S1 = 0
S2 = 0
H1 = 1
H2 = 2
H3 = 3
H4 = 4

And this is what it looks like in wg tunnel:
Jc = 100
Jmin = 10
Jmax = 1000
H1 = 1
H2 = 2
H3 = 3
H4 = 4

I guess it doesn't like 0 as input, but without there can't be a connection.

[zaneschepke]

Thanks for reporting this. I'll look into it!

[zaneschepke]

This is confusing. The problem lies in Amnezia's lib where they are setting the value to empty if it is equal to zero.

public Builder setInitPacketJunkSize(final int initPacketJunkSize) throws BadConfigException {
            if (initPacketJunkSize < 0)
                throw new BadConfigException(Section.INTERFACE, Location.INIT_PACKET_JUNK_SIZE,
                        Reason.INVALID_VALUE, String.valueOf(initPacketJunkSize));
            this.initPacketJunkSize = initPacketJunkSize == 0 ? Optional.empty() : Optional.of(initPacketJunkSize);
            return this;
        }

        public Builder setResponsePacketJunkSize(final int responsePacketJunkSize) throws BadConfigException {
            if (responsePacketJunkSize < 0)
                throw new BadConfigException(Section.INTERFACE, Location.RESPONSE_PACKET_JUNK_SIZE,
                        Reason.INVALID_VALUE, String.valueOf(responsePacketJunkSize));
            this.responsePacketJunkSize = responsePacketJunkSize == 0 ? Optional.empty() : Optional.of(responsePacketJunkSize);
            return this;
        }

I can easily change this in my fork, but I'm wondering if this is a bug or is the desired behavior by Amnezia.

[GrumpyGiuseppe]

If you look at their post here:
https://www.reddit.com/r/AmneziaVPN/comments/1c1gsvz/amneziawg_app_for_ios_and_android/
They say: 'Any change of S and H parameters to different from what we have written will not allow you to correctly use "obfuscation".'
If I get this right, S = 0 is necessary.
The only thing I also did was adding these values to my server. That was probably the reason that the entire connection could not be established.

I don't think this is a bug.
I used your amnezia config mode with amnezia backend, but this solution should also work with the official wg app.
So in theory if I use wg tunnel without anything amnezia related and just add the values to the config it should work.
But I am not sure if wg tunnel really use these amnezia values then. (does it?)
My thought is, if I also add these values to the server they are necessary so I get a sign if the clients config is wrong.
But I am also not sure about this.

So in conclusion the best solution would be to just add an option to add the values to the regular wg config.

[zaneschepke]

If you look at their post here: https://www.reddit.com/r/AmneziaVPN/comments/1c1gsvz/amneziawg_app_for_ios_and_android/ They say: 'Any change of S and H parameters to different from what we have written will not allow you to correctly use "obfuscation".' If I get this right, S = 0 is necessary. The only thing I also did was adding these values to my server. That was probably the reason that the entire connection could not be established.

I don't think this is a bug. I used your amnezia config mode with amnezia backend, but this solution should also work with the official wg app. So in theory if I use wg tunnel without anything amnezia related and just add the values to the config it should work. But I am not sure if wg tunnel really use these amnezia values then. (does it?) My thought is, if I also add these values to the server they are necessary so I get a sign if the clients config is wrong. But I am also not sure about this.

So in conclusion the best solution would be to just add an option to add the values to the regular wg config.

I will have to change Amnezia's code to allow for the value zero. This must be a bug in their code.