java program to access a router

TCMA · Jul 23, 2004

How to write a java program to access a router which has management
address http://192.168.2.1?
I have a problem with the first step which is to login with password.
This is my java program.

import java.io.*;
import java.net.*;

public class router {
public static void main(String[] args) throws Exception {
try {
if (args.length != 1) {
System.err.println("Usage: java router password");
System.exit(1);
}

String password = URLEncoder.encode(args[0], "US-ASCII");

URL url = new URL("http://192.168.2.1/");
URLConnection connection = url.openConnection();
connection.setDoOutput(true);

PrintWriter out = new PrintWriter(
connection.getOutputStream());
out.println(password);
// out.println(args[0]);
out.close();

BufferedReader in = new BufferedReader(
new InputStreamReader(
connection.getInputStream()));
String inputLine;

while ((inputLine = in.readLine()) != null)
System.out.println(inputLine);

in.close();
}
}
}

This is the output which display the login screen,
it seems that my login fails, does not get past the login screen?

$ java router mypassword
<HTML><HEAD>
<TITLE>SMC7004VBR - LOGIN</TITLE></HEAD>
<FRAMESET ROWS="0,*" BORDER=0 FRAMEBORDER=NO FRAMESPACING=0>
<FRAME SRC="/menu0.htm" NAME="space" SCROLLING="NO" BORDER=0>

<FRAME SRC="/login.htm" NAME="bottom" SCROLLING="NO" BORDER=0>
</FRAMESET></HTML>

Roedy Green · Jul 23, 2004

PrintWriter out = new PrintWriter(
connection.getOutputStream());
out.println(password);

Try watching what a browser does using a packet sniffer. the protocol
is a bit more complicated than you imagine.

see http://mindprod.com/jgloss/sniffer.html

See http://mindprod.com/fileio.html
to learn how to do CGI GET/POST

See also http://mindprod.com/jgloss/htmlcheat.html#FORMS

Boudewijn Dijkstra · Jul 23, 2004

TCMA said:
How to write a java program to access a router which has management
address http://192.168.2.1?

Many routers also have a Telnet client. This generally has much simpler
I/O.

Sam · Jul 24, 2004

How to write a java program to access a router which has management
address http://192.168.2.1?
I have a problem with the first step which is to login with password.
This is my java program.

import java.io.*;
import java.net.*;

public class router {
public static void main(String[] args) throws Exception {
try {
if (args.length != 1) {
System.err.println("Usage: java router password");
System.exit(1);
}

String password = URLEncoder.encode(args[0], "US-ASCII");

URL url = new URL("http://192.168.2.1/");
URLConnection connection = url.openConnection();
connection.setDoOutput(true);

PrintWriter out = new PrintWriter(
connection.getOutputStream());
out.println(password);
// out.println(args[0]);
out.close();

BufferedReader in = new BufferedReader(
new InputStreamReader(
connection.getInputStream()));
String inputLine;

while ((inputLine = in.readLine()) != null)
System.out.println(inputLine);

in.close();
}
}
}

This is the output which display the login screen,
it seems that my login fails, does not get past the login screen?

$ java router mypassword
<HTML><HEAD>
<TITLE>SMC7004VBR - LOGIN</TITLE></HEAD>
<FRAMESET ROWS="0,*" BORDER=0 FRAMEBORDER=NO FRAMESPACING=0>
<FRAME SRC="/menu0.htm" NAME="space" SCROLLING="NO" BORDER=0>

<FRAME SRC="/login.htm" NAME="bottom" SCROLLING="NO" BORDER=0>
</FRAMESET></HTML>

I'd be interested in your results with this. I do know that there is a
network management protocol that works with the TCP/IP suite, SNMP. If
your router implments it, there's at least one Java package out there
that should work with it (from google):
http://www2.rad.com/networks/1995/snmp/snmp.htm.

Regards,
Sam90

TCMA · Jul 28, 2004

Which Java package out there that should work with it (from google)?

How to write a java program to access a router which has management
address http://192.168.2.1?
I have a problem with the first step which is to login with password.
This is my java program.

import java.io.*;
import java.net.*;

public class router {
public static void main(String[] args) throws Exception {
try {
if (args.length != 1) {
System.err.println("Usage: java router password");
System.exit(1);
}

String password = URLEncoder.encode(args[0], "US-ASCII");

URL url = new URL("http://192.168.2.1/");
URLConnection connection = url.openConnection();
connection.setDoOutput(true);

PrintWriter out = new PrintWriter(
connection.getOutputStream());
out.println(password);
// out.println(args[0]);
out.close();

BufferedReader in = new BufferedReader(
new InputStreamReader(
connection.getInputStream()));
String inputLine;

while ((inputLine = in.readLine()) != null)
System.out.println(inputLine);

in.close();
}
}
}

This is the output which display the login screen,
it seems that my login fails, does not get past the login screen?

$ java router mypassword
<HTML><HEAD>
<TITLE>SMC7004VBR - LOGIN</TITLE></HEAD>
<FRAMESET ROWS="0,*" BORDER=0 FRAMEBORDER=NO FRAMESPACING=0>
<FRAME SRC="/menu0.htm" NAME="space" SCROLLING="NO" BORDER=0>

<FRAME SRC="/login.htm" NAME="bottom" SCROLLING="NO" BORDER=0>
</FRAMESET></HTML>

Click to expand...

I'd be interested in your results with this. I do know that there is a
network management protocol that works with the TCP/IP suite, SNMP. If
your router implments it, there's at least one Java package out there
that should work with it (from google):
http://www2.rad.com/networks/1995/snmp/snmp.htm.

Regards,
Sam90

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java program to access a router

TCMA

Roedy Green

Boudewijn Dijkstra

Sam

TCMA

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