SLP.CONF(4)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 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 = "
; 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 prop‐
erty 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: Net‐
work 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; unas‐
signed 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 mak‐
ing 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 stati‐
cally configured UAs and SAs. The property is
read by slpd(1M), and registrations are for‐
warded 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 net‐
work 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 ta‐
ble of service advertisements when a regis‐
tration 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 regis‐
trations 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 mes‐
sages.
net.slp.maxResults
Setting Type
Integer
Default Value
-1
Range of Values
-1, positive integer
A 32 bit-integer that specifies the maximum num‐
ber 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 │
├────────────────────┼─────────────────┤
│CSI │ Enabled │
├────────────────────┼─────────────────┤
│Interface Stability │ Standard │
└────────────────────┴─────────────────┘
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.
Feb 18, 2003 SLP.CONF(4)
