Wouter van Wegen
lazarus / 38-Networking and Web Programming

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pascalbythree · 2015-05-05 10:08

http://www.circuitsonline.net/forum/view/message/1716545#1716545


Does anybody have blocksocket source code to open a socket/lister as a
small TCP/IP server on Raspbian Linux?

Is it possible with lNet for lazarus on a Raspberry to open a Server
Socket, or is it only possible to work as a client socket?

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Swirl · 2015-08-11 07:05

Hallo Wouter,

yes it's (kind of) possible to run lnet components on Raspbian. It's
not smart because the debugger certainly makes sense but...
You have to switch off debugging (see: -> tools -> settings -> and set
debugger to <none>). Otherwise you get a "sigill" when you run your
program in IDE.

Examples for a simple server (tcp/ip) you'll find in the web.
Basic usage is provided here: https://lnet.wordpress.com/usage/usage-
guide/
And if you don't mind to read a german PDF look here:
http://www.martinjakobs.de/media/Lazarus/Client-Server-Kommunikation-
mit-LNET-und-Lazarus-26.11.2010.pdf

Regards,
Swirl

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avra · 2015-08-11 07:56

Quote from: pascalbythree on May 05, 2015, 12:08:28 pmIs it possible
with lNet for lazarus on a Raspberry to open a Server Socket, or is it
only possible to work as a client socket?Try tcp server port greater
then 1024.

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Thaddy · 2015-08-11 08:13

I am using synapse trunk for Raspbian and it works like a charm.
Synapse is a blocking sockets library.
I also have examples if you want.

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Thaddy · 2015-08-11 09:14

Quote from: avra on August 11, 2015, 09:56:59 amQuote from:
pascalbythree on May 05, 2015, 12:08:28 pmIs it possible with lNet for
lazarus on a Raspberry to open a Server Socket, or is it only possible
to work as a client socket?Try tcp server port greater then 1024.

Not necessary. The Pi can happily be used as a webserver, provided the
provider allows you to do that. In NL most do, otherwise use 8080/8081
which is pretty much standard.

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marcov · 2015-08-11 09:21

I think Avra means that you must be root for sockets below 1024.

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Thaddy · 2015-08-11 09:27

Huh? You know what I do for a living, Marco.

But: there have to be sufficient rights. root is not necessary. No
proper server runs with root rights.

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eny · 2015-08-11 09:47

Quote from: pascalbythree on May 05, 2015, 12:08:28
pmhttp://www.circuitsonline.net/forum/view/message/1716545#1716545Ah
yes, those friendly teen admins from CO: you can come in with your
opinion, but we'll force you to leave with ours...