[PATCH] UDP / dgram module

[Paul Querna]

Hello,

I have a working UDP implementation for node up on github:
<http://github.com/pquerna/node/tree/udp>

Just the patch:
<http://hera.kimaker.com/~chip/patches/node_dgram_v1.patch>

'Features':
- Adds new dgram module, for all data-gram type transports
- Supports both UDP client and servers
- Supports Unix Daemon sockets in DGRAM mode too (think syslog)
- Uses a shared Buffer and slices that as needed to be reasonably performant.
- One supplied test program so far, test-dgram-pingpong
- Passes test cases on osx 10.6 and ubuntu 9.10

Examples:
<http://gist.github.com/435513>
<http://github.com/pquerna/node/blob/udp/test/simple/test-dgram-pingpong.js>

Thanks to Ryan for giving feedback on a first version earlier today.

Thoughts?

Thanks,

Paul

[r...@tinyclouds.org]

On Sat, Jun 12, 2010 at 12:19 AM, Paul Querna <pqu...@apache.org> wrote:
> Hello,
>
> I have a working UDP implementation for node up on github:
>  <http://github.com/pquerna/node/tree/udp>

Thanks Paul, this is great! Landed in 02da5ed.

[r...@tinyclouds.org]

A documentation patch would be welcome!

[Matt Ranney]

Nice! That was fast.

What will you do for the weekend though?

[Elijah Insua]

Very nice! thank you Paul!

-- Elijah

On Sat, Jun 12, 2010 at 9:17 AM, Matt Ranney <m...@ranney.com> wrote:

Nice!  That was fast.

What will you do for the weekend though?

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[Brian Hammond]

This is a wonderful development. Thank you!

On Jun 12, 3:19 am, Paul Querna <pque...@apache.org> wrote:
> Hello,
>
> I have a working UDP implementation for node up on github:
>   <http://github.com/pquerna/node/tree/udp>
>
> Just the patch:
>  <http://hera.kimaker.com/~chip/patches/node_dgram_v1.patch>
>
> 'Features':
>   - Adds new dgram module, for all data-gram type transports
>   - Supports both UDP client and servers
>   - Supports Unix Daemon sockets in DGRAM mode too (think syslog)
>   - Uses a shared Buffer and slices that as needed to be reasonably performant.
>   - One supplied test program so far, test-dgram-pingpong
>   - Passes test cases on osx 10.6 and ubuntu 9.10
>
> Examples:
>   <http://gist.github.com/435513>

>   <http://github.com/pquerna/node/blob/udp/test/simple/test-dgram-pingpo...>

[Chris Dew]

Thanks, this looks very useful.

Slightly off-topic: Are there any functions in NodeJS, or in
Javascript generally, to process the bytes in a UDP packet (or any
buffer) as (C-style) longs, unsigned shorts, doubles, floats, or even
structs?

Regards,

Chris.

[Brian Hammond]

Check out node-msgpack

[Brian Hammond]

Hi -

I'm trying to use the UDP-enabled version of Node to send datagrams
over a UNIX socket.

I have a simple "echo" server. I might be missing something here but
the `send` seems to trigger the readability of the fd which causes the
"message" event to be emitted with the message I'm trying to echo back
through the domain socket.

Help?

For kicks, the client is in C.

http://gist.github.com/437301

Thanks,
Brian

On Jun 12, 3:19 am, Paul Querna <pque...@apache.org> wrote:

> Hello,
>
> I have a working UDP implementation for node up on github:
>   <http://github.com/pquerna/node/tree/udp>
>
> Just the patch:
>  <http://hera.kimaker.com/~chip/patches/node_dgram_v1.patch>
>
> 'Features':
>   - Adds new dgram module, for all data-gram type transports
>   - Supports both UDP client and servers
>   - Supports Unix Daemon sockets in DGRAM mode too (think syslog)
>   - Uses a shared Buffer and slices that as needed to be reasonably performant.
>   - One supplied test program so far, test-dgram-pingpong
>   - Passes test cases on osx 10.6 and ubuntu 9.10
>
> Examples:
>   <http://gist.github.com/435513>

>   <http://github.com/pquerna/node/blob/udp/test/simple/test-dgram-pingpo...>

[r...@tinyclouds.org]

On Sun, Jun 13, 2010 at 10:17 PM, Chris Dew <cms...@gmail.com> wrote:
> Thanks, this looks very useful.
>
> Slightly off-topic: Are there any functions in NodeJS, or in
> Javascript generally, to process the bytes in a UDP packet (or any
> buffer) as (C-style) longs, unsigned shorts, doubles, floats, or even
> structs?

No. I've been meaning to add 'pack' and 'unpack' functionality to
buffers for a while now. You can find a few examples in node-amqp:

http://github.com/ry/node-amqp/blob/5abe293f2206347153abc7206f55a3ef5b1338fb/amqp.js#L238

[Chris Dew]

The examples are useful. Thanks for writing NodeJS.

I'm using NodeJS for a commercial project. I started using NodeJS for
a proof-of-concept, but no major problems were encountered. NodeJS is
functioning as the message switch, while Django is used for the more
'static' parts of the application (its ORM / admin gets simple things
working quickly).

All the best,

Chris.

> http://github.com/ry/node-amqp/blob/5abe293f2206347153abc7206f55a3ef5...

[Chris Dew]

Thanks for the hint, but I'm looking for a little more control as I'm
dealing with existing formats/protocols.

Regards,

Chris.

[Peter Griess]

This is probably what you want.

http://github.com/pgriess/node-jspack

Peter

[Chris Dew]

That's exactly what I'm looking for.

Thanks,

Chris.