xref: /titanic_50/usr/src/man/man4/slp.conf.4 (revision 447603b54aaea470ed1dcdb5c52d0be1d7801f84) 
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 slp.conf 4 "18 Feb 2003" "SunOS 5.11" "File Formats"
 NAME
slp.conf - configuration file for Service Location Protocol agents

 SYNOPSIS


/etc/inet/slp.conf




 DESCRIPTION

slp.conf  provides all Service Location Protocol ("SLP") agents
with their operational configuration. slpd(1M) reads slp.conf on
startup. Service Agents ("SAs") and User Agents ("UAs") read
slp.conf on invocation of the SA and UA library routines;
configuration parameters are then cached on a per-process basis. All SA's
must use the same set of properties as slpd on the local machine, since
slpd acts as an SA server.


The configuration file format consists of a newline-delimited list of zero or
more property definitions. Each property definition corresponds to a particular
configurable SLP, network, or other parameter in one or more of the three
SLP agents. The file format grammar is shown in RFC 2234 as
follows:

config-file = line-list
line-list = line / line line-list
line = property-line / comment-line
comment-line = ( "#" / ";" ) 1*allchar newline
property-line = property newline
property = tag "=" value-list
tag = prop / prop "." tag
prop = 1*tagchar
value-list = value / value "," value-list
value = int / bool /
 "(" value-list ")" / string
int = 1*DIGIT
bool = "true" / "false" / "TRUE" / "FALSE"
newline = CR / ( CRLF )
string = 1*stringchar
tagchar = DIGIT / ALPHA / tother / escape
tother = %x21-%x2d / %x2f /
 %x3a / %x3c-%x40 /
 %x5b-%x60 / %7b-%7e
 ; i.e., all characters except `.',
 ; and `='.
stringchar = DIGIT / ALPHA / sother / escape
sother = %x21-%x29 / %x2a-%x2b /
 %x2d-%x2f / %x3a-%x40 /
 %x5b-%x60 / %7b-%7e
 ; i.e., all characters except `,'
allchar = DIGIT / ALPHA / HTAB / SP
escape = "\" HEXDIG HEXDIG
 ; Used for reserved characters





The properties fall into one of the following categories:




DA Configuration






Static Scope Configuration






Tracing and Logging






Serialized Proxy Registrations






Networking Configuration Parameters






UA Configuration



 "DA Configuration"

The following are configuration properties and their parameters for DAs:


net.slp.isDA




Setting Type


Boolean





Default Value


False





Range of Values


True or False



A boolean that indicates whether slpd(1M) is to act as a DA. If
False, slpd(1M) is not run as a DA.





net.slp.DAHeartBeat




Setting Type


Integer





Default Value


10800 seconds (3 hours)





Range of Values


2000 - 259200000 seconds



A 32-bit integer giving the number of seconds for the passive DA
advertisement heartbeat. The default value is 10800 seconds. This property is
ignored if net.slp.isDA is False.





net.slp.DAAttributes




Setting Type


List of Strings





Default Value


Unassigned





Range of Values


List of Attribute Tag/Value List Pairs



A comma-separated list of parenthesized attribute tag/value list pairs that the
DA must advertise in DA advertisements. The property must be in
the SLP attribute list wire format, which requires that you use a
backslash ("\\") to escape reserved characters. See RFC 2608 for more
information on reserved characters, or refer to the System Administration
Guide: Network Services.




 "Static Scope Configuration"

The following properties and their parameters allow you to configure various
aspects of scope and DA handling:


net.slp.useScopes




Setting Type


List of Strings





Default Value


Default, for SA and DA; unassigned for UA.





Range of Values


List of Strings



A list of strings indicating either the scopes that a UA or an SA
is allowed to use when making requests, or the scopes a DA must
support. If not present for the DA and SA, the default scope
Default is used. If not present for the UA, then the user scoping
model is in force, in which active and passive DA or SA discovery
are used for scope discovery. The scope Default is used if no other
information is available. If a DA or SA gets another scope in a
request, a SCOPE_NOT_SUPPORTED error is returned, unless the request was
multicast, in which case it is dropped. If a DA receives another scope in
a registration, a SCOPE_NOT_SUPPORTED error will be returned. Unlike
other properties, this property is "read-only", so attempts to change it
programmatically after the configuration file has been read are ignored.





net.slp.DAAddresses




Setting Type


List of Strings





Default Value


Unassigned





Range of Values


IPv4 addresses or host names



A list of IP addresses or DNS-resolvable names that denote
the DAs to use for statically configured UAs and SAs. The
property is read by slpd(1M), and registrations are forwarded to the
DAs. The DAs are provided to UAs upon request. Unlike other
properties, this property is "read-only", so attempts to change it after the
configuration file has been read are ignored.
The following grammar describes the property:

addr-list = addr / addr "," addr-list
addr = fqdn / hostnumber
fqdn = ALPHA / ALPHA *[ anum / "-" ] anum
anum = ALPHA / DIGIT
hostnumber = 1*3DIGIT 3("." 1*3DIGIT)



The following is an example using this grammar:

sawah,mandi,sambal



IP addresses can be used instead of host names in networks where
DNS is not deployed, but network administrators are reminded that using
IP addresses will complicate machine renumbering, since the SLP
configuration property files in statically configured networks will have to be
changed.




 "Tracing and Logging"

These properties direct tracing and logging information to be sent to
syslogd at the LOG_INFO priority. These properties affect
slpd(1M) only.


net.slp.traceDATraffic




Setting Type


Boolean





Default Value


False





Range of Values


True or False



Set net.slp.traceDATraffic to True to enable logging of DA
traffic by slpd.





net.slp.traceMsg




Setting Type


Boolean





Default Value


False





Range of Values


True or False



Set net.slp.traceMsg to True to display details about SLP
messages. The fields in all incoming messages and outgoing replies are
printed by slpd.





net.slp.traceDrop




Setting Type


Boolean





Default Value


False





Range of Values


True or False



Set this property to True to display details when an SLPmessage is
dropped by slpd for any reason.





net.slp.traceReg




Setting Type


Boolean





Default Value


False





Range of Values


True or False



Set this property to True to display the table of service advertisements
when a registration or deregistration is processed by slpd.




 "Serialized Proxy Registrations"

The following properties control reading and writing serialized
registrations.


net.slp.serializedRegURL




Setting Type


String





Default Value


Unassigned





Range of Values


Valid URL



A string containing a URL pointing to a document, which contains
serialized registrations that should be processed when the slpd starts
up.




 "Networking Configuration Parameters"

The properties that follow allow you to set various network configuration
parameters:


net.slp.isBroadcastOnly




Setting Type


Boolean





Default Value


False





Range of Values


True or False



A boolean that indicates if broadcast should be used instead of multicast.





net.slp.multicastTTL




Setting Type


Positive Integer





Default Value


255





Range of Values


A positive integer from 1 to 255.



A positive integer less than or equal to 255 that defines the multicast
TTL.





net.slp.DAActiveDiscoveryInterval




Setting Type


Integer





Default Value


900 seconds (15 minutes)





Range of Values


From 300 to 10800 seconds



A 16-bit positive integer giving the number of seconds between DA active
discovery queries. The default value is 900 seconds (15 minutes). If the
property is set to zero, active discovery is turned off. This is useful when
the DAs available are explicitly restricted to those obtained from the
net.slp.DAAddresses property.





net.slp.multicastMaximumWait




Setting Type


Integer





Default Value


15000 milliseconds (15 seconds)





Range of Values


 1000 to 60000 milliseconds



A 32-bit integer giving the maximum value for the sum of the
net.slp.multicastTimeouts values and net.slp.DADiscoveryTimeouts
values in milliseconds.





net.slp.multicastTimeouts




Setting Type


List of Integers





Default Value


3000,3000,3000,3000





Range of Values


List of Positive Integers



A list of 32-bit integers used as timeouts, in milliseconds, to implement the
multicast convergence algorithm. Each value specifies the time to wait before
sending the next request, or until nothing new has been learned from two
successive requests. In a fast network the aggressive values of
1000,1250,1500,2000,4000 allow better performance. The sum of the list
must equal net.slp.multicastMaximumWait.





net.slp.passiveDADetection




Setting Type


Boolean





Default Value


True





Range of Values


True or False



A boolean indicating whether slpd should perform passive DA
detection.





net.slp.DADiscoveryTimeouts




Setting Type


List of Integers.





Default Value


2000,2000,2000,2000,3000,4000





Range of Values


List of Positive Integers



A list of 32-bit integers used as timeouts, in milliseconds, to implement the
multicast convergence algorithm during active DA discovery. Each value
specifies the time to wait before sending the next request, or until nothing
new has been learned from two successive requests. The sum of the list must
equal net.slp.multicastMaximumWait.





net.slp.datagramTimeouts




Setting Type


List of Integers





Default Value


3000,3000,3000





Range of Values


List of Positive Integers



A list of 32-bit integers used as timeouts, in milliseconds, to implement
unicast datagram transmission to DAs. The nth value gives the time
to block waiting for a reply on the nth try to contact the DA.





net.slp.randomWaitBound




Setting Type


Integer





Default Value


1000 milliseconds (1 second)





Range of Values


1000 to 3000 milliseconds



Sets the upper bound for calculating the random wait time before attempting to
contact a DA.





net.slp.MTU




Setting Type


Integer





Default Value


1400





Range of Values


128 to 8192



A 16-bit integer that specifies the network packet size, in bytes. The packet
size includes IP and TCP or UDP headers.





net.slp.interfaces




Setting Type


List of Strings





Default Value


Default interface





Range of Values


IPv4 addresses or host names



List of strings giving the IP addresses or host names of the network
interface cards on which the DA or SA should listen on port 427 for
multicast, unicast UDP, and TCP messages. The default value is
unassigned, indicating that the default network interface card should be used.
An example is:

195.42.42.42,195.42.142.1,195.42.120.1



The example machine has three interfaces on which the DA should listen.
Note that if IP addresses are used, the property must be renumbered if
the network is renumbered.




 "UA Configuration"

The following configuration parameters apply to the UA:


net.slp.locale




Setting Type


String





Default Value


en





Range of Values


See RFC 1766 for a list of the locale language tag names.



A RFC 1766 Language Tag for the language locale. Setting this
property causes the property value to become the default locale for
SLP messages.





net.slp.maxResults




Setting Type


Integer





Default Value


-1





Range of Values


-1, positive integer



A 32 bit-integer that specifies the maximum number of results to accumulate and
return for a synchronous request before the timeout, or the maximum number of
results to return through a callback if the request results are reported
asynchronously. Positive integers and -1 are legal values. If the value
of net.slp.maxResults is -1, all results should be returned.





net.slp.typeHint




Setting Type


List of Strings





Default Value


Unassigned





Range of Values


Service type names



A list of service type names. In the absence of any DAs, UAs
perform SA discovery to find scopes. If the net.slp.typeHint
property is set, only SA's advertising types on the list respond. Note
that UAs set this property programmatically. It is not typically set in
the configuration file. The default is unassigned, meaning do not restrict the
type.




 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:







ATTRIBUTE TYPEATTRIBUTE VALUE
CSIEnabled
Interface Stability Standard



 SEE ALSO

slpd(1M), slpd.reg(4), slp_api(3SLP), slp(7P)


System Administration Guide: Network Services


Alvestrand, H.RFC 1766: Tags for the Identification of Languages. Network
Working Group. March 1995.


Crocker, D., Overell, P.RFC 2234, Augmented BNF for Syntax Specifications:
ABNF. The Internet Society. 1997.


Kempf, J. and Guttman, E. RFC 2614, An API for Service Location. The
Internet Society. June 1999.