Android connect to tethering socket

I have 2 android devices, one acts as a server that is in tethering mode, and accepting connections to a port. The other device acts as a client that connects to the server hotspot and establishes a connection to the server via a port. (Everything is done without a router in the middle).

The server code looks like this: (When the android server executes the code, the device is in tethering mode)

ServerSocket server = new ServerSocket(PORT);

while (true) {
    Socket client;
    client = server.accept();
    ClientThread com = new ClientThread(client, this);
    Thread t = new Thread(com);
    t.start();
}

The client code looks like this: (when the android client executes this code, the device is connected to access point)

Socket client = new Socket();
int serverIP = wifiManager.getDhcpInfo().serverAddress;
String stringIP = android.text.format.Formatter.formatIpAddress(serverIP);
InetAddress address = InetAddress.getByName(stringIP);
SocketAddress socketAddress = new InetSocketAddress(address, PORT);
client.connect(socketAddress);

I get the following error on the client

java.net.ConnectException: failed to connect to /192.168.43.1 (port 12345): connect failed: ENETUNREACH (Network is unreachable)
  at libcore.io.IoBridge.connect(IoBridge.java:114)
  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
  at java.net.Socket.connect(Socket.java:842)
  at java.net.Socket.connect(Socket.java:785)
  at com.alternatewifimeshmessaging.HostManager.clientConnect(HostManager.java:283)
  at com.alternatewifimeshmessaging.HostManager.client(HostManager.java:189)
  at com.alternatewifimeshmessaging.HostManager.run(HostManager.java:59)
  at java.lang.Thread.run(Thread.java:856)
Caused by: libcore.io.ErrnoException: connect failed: ENETUNREACH (Network is unreachable)
  at libcore.io.Posix.connect(Native Method)
  a