Develop Reference

Can't connect to WiFi - CTRL-EVENT-ASSOC-REJECT, status code = 1, ASSOC_REJECT 12 - wpa_supplicant

I am trying to connect to my Wifi router with my Xiaomi Mi Max 2. I can connect to every router, but not to this one. Also, every other phone can connect to that router. I already tried changing protocols or resetting the router / phone.
Looking at logcat, I get the following:
wpa_supplicant: wlan0: Event ASSOC_REJECT (12) received
wlan0: CTRL-EVENT-ASSOC-REJECT bssid=6c:99:24:0f:51:d2 status_code=1
wpa_supplicant: Continuous association failures - consider temporary network disabling
wpa_supplicant: wlan0: CTRL-EVENT-SSID-TEMP-DISABLED [...]
Does anyone know what's going on and how I can solve this?
Best,
Trim

Server(AndroidWebServer) not reachable from pc

I have created AndroidWebServer on my android phone.
When I try to access 192.168.1.150:8000 (phone address) I have good response from the server. But when I try to access the same url from the pc (connected via WiFi on the same network) nothing happens.
When the server is active if I run this
adb shell netstat -at
tcp 0 0 ::ffff:127.0.0.1:8000 :::* LISTEN
That is weird because other services got foreign address
tcp 0 0 ::ffff:192.168.1.150:54 ::ffff:173.194.76.188:5 ESTABLISHED
tcp 0 0 ::ffff:192.168.1.150:36 ::ffff:31.13.92.33:http ESTABLISHED
for my service the foring address is :::*
I am not sure what I do wrong
https://github.com/lopspower/AndroidWebServer
AndroidWebServer androidWebServer = new AndroidWebServer(8000);
androidWebServer.start();
What should I change in order my phone to be accessible from my pc connected to the same WiFi network?
Thanks

Looks like your server is listening on localhost. That means it will only accept connections that originate on the local machine. Try listening on 0.0.0.0 instead; that means you accept connections from all origins.
EDIT
Change this line:
AndroidWebServer androidWebServer = new AndroidWebServer("0.0.0.0", 8000);

How to get the default interface and its inet address?

"Default interface" refers to ppp0:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0
0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 wlp3s0
172.30.0.1 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 wlp3s0
Which one is used by default when I access WAN instead of LAN.
I need to run it on Android,so I can't use getifaddrs,because ifaddrs.h is NOT in the Android NDK.

Uhh, I don't know if an interface can be marked as "default", but there are plenty way to retrieve interface list without getifaddrs.
You can execute "ip link show" command and parse the result (or "ifconfig").
you can go to "/sys/class/net" where each directory reprensent an interface (and there is file under those directory that can help you).
I don't know if Android work like Debian, and I recommand you to find a way through Android NDK or system command (like "ip" or "ifconfig") because directory like /net or /proc are subject to change between different OS version (even if it's not really common, I can't recall to have see that).

Android VpnService. Why does all traffic go through the TUN device?

I created a TUN device using VpnService. Why does the TUN interface have the highest priority among other network interfaces of my device?
Update #1
This is how I configured the TUN device:
mInterface = new Builder().setSession(getString(R.string.app_name))
.addAddress("10.0.1.1", 24)
.addRoute("0.0.0.0", 1)
.addRoute("128.0.0.0", 1)
.establish();
Update #2
This is the output of route -n without the TUN device:
shell#m0:/ $ busybox route -n
busybox route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.197.55.0 0.0.0.0 255.255.255.0 U 0 0 0 rmnet0
This is the output of route -n with the TUN device:
shell#m0:/ $ busybox route -n
busybox route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.1.0 0.0.0.0 255.255.255.0 U 0 0 0 tun0
10.197.55.0 0.0.0.0 255.255.255.0 U 0 0 0 rmnet0
shell#m0:/ $

If VpnService is enabled on Android, it does not mean that all traffic goes through VpnTunnel. This depends on IP route and allow/disable application proxy settings.
mInterface = new Builder().setSession(getString(R.string.app_name))
.addAddress("10.0.1.1", 24)
.addRoute("0.0.0.0", 1)
.addRoute("128.0.0.0", 1)
.establish();
The above code is obviously global routing, equivalent to 0.0.0.0/0, as you probably know from OpenVPN settings.
If the default gateway is tun, all IP traffic passes through the tun device.
In this case, if you don't want a socket traffic to pass through tun, you need to call VpnService::p rotect function for socket-fd to protect fd.
But that's not enough, you'll also need to find a valid network (not a VPN), call its Network::bindSocket function, and have a Socket go over that network and out.
If you don't want to protect the socket with the Network::bindSocket function! Then you can set the default network, but it is only valid for the android-process of opening the VPN service.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
try {
ConnectivityManager cm = PppVpnNetworkListener.getConnectivityManager(this._service);
if (cm != null) {
cm.bindProcessToNetwork(network);
}
} catch (Throwable ignored) {
}
}
try {
ConnectivityManager.setProcessDefaultNetwork(network);
} catch (Throwable ignored) {
}

why the gateway to be bogon?

I connect my Android phone with my PC through USB. And open the usb tether option on the phone.
So, there is a new remote NDIS network adapter displayed in the PC's network connections, and there is a rnndis0 IFface on the android.
I do the following configurations:
PC: ip: 192.168.42.1 netmask: 255.255.255.0
Phone: ip 192.168.42.2 netmask: 255.255.255.0
And when ping each other, both work ok.
But when I configure the default gateway of my phone to be the address of the PC, it failed.
busybox route add default gw 192.168.42.1
busybox route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default bogon 0.0.0.0 UG 0 0 0 rndis0
192.168.42.0 * 255.255.255.0 U 0 0 0 rndis0
can anyone tell me the reason?

I believe it's marked as bogon as it is an address which should not appear in a routing table, ie a bogon route.
This is because it is a private network address. It's only a warning though.
see http://packetlife.net/blog/2009/jan/21/whats-bogon/

What is the output of
$ ip route
on Android?
SivlerZhao
Yesterday, I was unable to reproduce the problem.
Now, it reproduced.
busybox route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default bogon 0.0.0.0 UG 0 0 0 rndis0
192.168.137.0 * 255.255.255.0 U 0 0 0 rndis0
And the output of ip route is:
busybox ip route
default via 192.168.137.1 dev rndis0
192.168.137.0/24 dev rndis0 src 192.168.137.2
Actually, it works ok, but the "bogon" word apears