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# Service Location Protocol on SUSE
#

The Service Location Protcol (SLP) is part of the zerconf concept to provide
service informations inside a local network.

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# The client side
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Your client can search for avaible services using the slp library or via 
using the slptool binary (for scripting).

WARNING: Have in mind that you can usually NOT trust the results.
         It is up to the service client to validate the server.
         Do NOT authentificate to an untrusted server or it might be 
         possible it gets your password.

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# The server side
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Every system which provides a service which should get announced with SLP
in the network needs also to run the slpd. There are several possible ways
to announce the service:

 1) The authors of any service daemon should directly use libslp to
    register the service on the server. Documentation for this can be 
    found in /usr/share/doc/packages/openslp/html/ProgrammersGuide/
     
 2) Packages without direct SLP support should provide a registration
    file in the /etc/slp.reg.d/ directory. See below for a template.
    You can use the pseudo attributes watch-port-tcp and watch-port-udp
    to make slpd check if the service is listening on the specified port.
    This way a not-running service won't get announced by slpd.

 3) Administrators can add service lines in the /etc/slp.reg file. 
    
 4) The slptool can be used to register a service in any script.


Example of a registration file.
This could be used to announce the sane daemon running on port 6566
------------------------------------------------------------------------
## Register a saned service on this system
## en means english language
## 65535 disables the timeout, so the service registration does
## not need refreshs
service:scanner.sane://$HOSTNAME:6566,en,65535
# only announce the service if a daemon is listening on tcp port 6566
watch-port-tcp=6566
description=SANE scanner daemon
------------------------------------------------------------------------