slp.conf(4) File Formats slp.conf(4)
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 corre-
sponds 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 = "
; Used for reserved characters
The properties fall into one of the following categories:
o DA Configuration
o Static Scope Configuration
o Tracing and Logging
o Serialized Proxy Registrations
o Networking Configuration Parameters
o 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 informa-
tion 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 min-
utes). 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 discov-
ery. 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 renum-
bered 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 TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWslpr |
+-----------------------------+-----------------------------+
|CSI |Enabled |
+-----------------------------+-----------------------------+
|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.
SunOS 5.10 18 Feb 2003 slp.conf(4)