= Ubuntu with Click =

[[TOC]]

We have two OS images with support for [http://read.cs.ucla.edu/click The Click Modular Router]: Ubuntu804-click and Ubuntu1004-click20.

We support click 1.8 (in Ubuntu804-click) and click 2.0 (in Ubuntu1004-click20).

=== Ubuntu804-click ===

Ubuntu804-click is based on Ubuntu804-STD with the following modifications
 * loads as a full disk image with about 15 GB free on /
 * kernel 2.6.24.7-click
 * click 1.8.0 installed in /usr/local
 * click and kernel source in /usr/src

=== Ubuntu1004-click20 ===

Ubuntu1004-click20 is based on Ubuntu1004-STD with the following modifications
 * loads as a full disk image with about 12 GB free on /
 * click 2.0 installed in /usr/local
 * click source in /usr/src

== Using click ==

click is installed in {{{/usr/local}}}. If you do not require custom modules, the images should be usable out of the box.

=== Running the example ===

For a simple example, download [attachment:test.click test.click] and copy it to your home directory on users.

On a node running Ubuntu804-click or Ubuntu1004-click20, run the following command:

{{{
sudo click-install test.click
}}}

This will install the example configuration into click running in the kernel. If it succeeds, you should see output similar to the following by running {{{dmesg}}} or reading {{{/var/log/kern.log}}}:

{{{
[66530.612983] chatter: ok:   40 | 45000028 00000000 401177c3 01000001 02000002 13691369
[66530.620905] chatter: ok:   40 | 45000028 00000000 401177c3 01000001 02000002 13691369
[66530.628821] chatter: ok:   40 | 45000028 00000000 401177c3 01000001 02000002 13691369
[66530.636725] chatter: ok:   40 | 45000028 00000000 401177c3 01000001 02000002 13691369
[66530.644618] chatter: ok:   40 | 45000028 00000000 401177c3 01000001 02000002 13691369
}}}

== Building custom modules ==

The source for click is in {{{/usr/src/click-1.8.0}}} or {{{/usr/src/click-2.0}}}.

Custom modules are typically built in the local elements folder. Copy your source files into {{{/usr/src/click-1.8.0/elements/local}}} or {{{/usr/src/click-2.0/elements/local}}} and give configure the {{{--enable-local}}} flag.

=== Ubuntu804-click ===
In click 1.8, you must give configure the path to the kernel source.
{{{
$ sudo -s
# cd /usr/src/click-1.8.0
# ./configure --with-linux=/usr/src/linux-2.6.24.7 --enable-local
}}}

=== Ubuntu1004-click20 ===
{{{
$ sudo -s
# cd /usr/src/click-2.0
# ./configure --enable-local
}}}

=== Building and installing ===
At this point building and installing is as simple as:

{{{
# make && make install
}}}

== Further Reading ==

 * [http://read.cs.ucla.edu/click Click Module Router]
 * [http://read.cs.ucla.edu/click/examples click examples]
 * [UbuntuImage general Ubuntu image info]