EchoLink Proxy on Kindle?

[virtualdxs]

Hello, all. I am trying to set up an EchoLink Proxy on my Kindle, which is a jar file. I thought this would be easy, since I knew that the Kindle was built on about half Java. However, it seems that the Kindle doesn't have the 'java' command. So will it be easy to make a Kindlet out of the attached jar file?

Note: The .jar file needs access to the .conf file.

[twobob]

http://www.oracle.com/technetwork/sy...ex-156655.html

[virtualdxs]

I'm sorry if I'm being a noob, but I don't know how that answers my question.

[knc1]

Originally Posted by virtualdxs

I'm sorry if I'm being a noob, but I don't know how that answers my question.

The Kindles have a CVM rather than a JVM.
Differences and similarities explained in the link.

I.E: the command 'java' is not the only way to run a java program.

[virtualdxs]

Originally Posted by knc1

The Kindles have a CVM rather than a JVM.
Differences and similarities explained in the link.

I.E: the command 'java' is not the only way to run a java program.

Thanks. Does a CVM have a command other than 'java'? If so, what is it, and if not, how do I launch it?

[eschwartz]

http://docs.oracle.com/javame/config...e/html/cvm.htm

[virtualdxs]

#################################################
#  N O T I C E  *  N O T I C E  *  N O T I C E  #
#################################################
Rootfs is mounted read-only. Invoke mntroot rw to
switch back to a writable rootfs.
#################################################
[root@kindle root]# cvm -h
-sh: cvm: not found
[root@kindle root]#

[virtualdxs]

Never mind. I found it in /usr/java/bin.

[virtualdxs]

[root@kindle /]# /usr/java/bin/cvm --help
Could not create JVM.
[root@kindle /]# /usr/java/bin/cvm -help
[root@kindle /]# /usr/java/bin/cvm -h
Could not create JVM.
[root@kindle /]#

[twobob]

Yup, they dont make it easy huh.

It's been a while but... https://www.mobileread.com/forums/sho...84&postcount=8 I think is the cvm on the touch.

[brianinmaine]

https://www.mobileread.com/forums/sho...d.php?t=214488

do you need echolink? would a ssh tunnel work well instead? I've tunneled tons of encrypted traffic that way to my home pc, tons of examples on the net. Good luck!

[ixtab]

Originally Posted by virtualdxs

Hello, all. I am trying to set up an EchoLink Proxy on my Kindle, which is a jar file. I thought this would be easy, since I knew that the Kindle was built on about half Java. However, it seems that the Kindle doesn't have the 'java' command. So will it be easy to make a Kindlet out of the attached jar file?

Note: The .jar file needs access to the .conf file.

It should not be terribly difficult, but it won't be totally trivial either.

Here's some background:

The Kindles do indeed come with a JVM. In fact, (almost) the entire framework frontend is written in Java. So, when a Kindle runs, there is already a running JVM.

Kindlets are then simply classes which are loaded at runtime, and which can "take over" the screen - using a predefined API, and normally with restricted functionality (but the latter part can be overcome with the Kindlet Jailbreak).


I have not tried your jar file (in fact, I don't even know what echolink is), but you have two possibilities:

1. Figure out how to start a second JVM which runs your jar file. On a "real" computer, that would usually be "java -jar myapp.jar", but the Kindle cvm may need different parameters. You should be able to figure them out by looking at the output of "ps wwwaux|grep cvm".

2. Write a proper Kindlet which bundles your jar, and calls the respective functionality. That may be a lot trickier, especially for jars which rely on the console (System.in, System.out, etc) and/or which require unrestricted functionality (network I/O via Sockets etc).

[virtualdxs]

Originally Posted by brianinmaine

https://www.mobileread.com/forums/sho...d.php?t=214488

do you need echolink? would a ssh tunnel work well instead? I've tunneled tons of encrypted traffic that way to my home pc, tons of examples on the net. Good luck!

I know about that, and that's exactly why I need this. You see, I can ONLY access the Internet through an SSH tunnel. EchoLink is a service for hams (Amateur Radio operators) to send sham radio signals through the Internet. However, the only type of proxy it supports is that jar file. Therefore, I need that proxy running on my Kindle to use EchoLink.

[virtualdxs]

Originally Posted by twobob

Yup, they dont make it easy huh.

It's been a while but... https://www.mobileread.com/forums/sho...84&postcount=8 I think is the cvm on the touch.

How do you get that log?

[virtualdxs]

Originally Posted by ixtab

It should not be terribly difficult, but it won't be totally trivial either.

Here's some background:

The Kindles do indeed come with a JVM. In fact, (almost) the entire framework frontend is written in Java. So, when a Kindle runs, there is already a running JVM.

Kindlets are then simply classes which are loaded at runtime, and which can "take over" the screen - using a predefined API, and normally with restricted functionality (but the latter part can be overcome with the Kindlet Jailbreak).


I have not tried your jar file (in fact, I don't even know what echolink is), but you have two possibilities:

1. Figure out how to start a second JVM which runs your jar file. On a "real" computer, that would usually be "java -jar myapp.jar", but the Kindle cvm may need different parameters. You should be able to figure them out by looking at the output of "ps wwwaux|grep cvm".

2. Write a proper Kindlet which bundles your jar, and calls the respective functionality. That may be a lot trickier, especially for jars which rely on the console (System.in, System.out, etc) and/or which require unrestricted functionality (network I/O via Sockets etc).

I'll find the parameters for CVM, since (just about) all I know about Java is that it's NOT JavaScript.