slp.conf(4) File Formats slp.conf(4)NAMEslp.conf - configuration file for Service Location Protocol agents
SYNOPSIS
/etc/inet/slp.conf
DESCRIPTIONslp.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 invoca‐
tion 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 prop‐
erty must be in the SLP attribute list wire format, which requires
that you use a backslash ("
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 prop‐
erty is read by slpd(1M), and registrations are forwarded to the
DAs. The DAs are provided to UAs upon request. Unlike other proper‐
ties, 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 adver‐
tisements 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 configura‐
tion 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 net‐
work the aggressive values of 1000,1250,1500,2000,4000 allow better
performance. The sum of the list must equal net.slp.multicastMaxi‐
mumWait.
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 dis‐
covery. Each value specifies the time to wait before sending the
next request, or until nothing new has been learned from two suc‐
cessive requests. The sum of the list must equal net.slp.multicast‐
MaximumWait.
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 con‐
tact 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 net‐
work 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 per‐
form 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 │service/network/slp │
├─────────────────────────────┼─────────────────────────────┤
│CSI │Enabled │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOslpd(1M), slpd.reg(4), slp_api(3SLP), slp(7P)
System Administration Guide: Network Services
Alvestrand, H.RFC 1766: Tags for the Identification of Languages. Net‐
work Working Group. March 1995.
Crocker, D., Overell, P.RFC 2234, Augmented BNF for Syntax Specifica‐
tions: ABNF. The Internet Society. 1997.
Kempf, J. and Guttman, E. RFC 2614, An API for Service Location. The
Internet Society. June 1999.
SunOS 5.11 18 Feb 2003 slp.conf(4)
