peval
peval is a low level policy evaluation tool that can be used to write router configuration generators.
The man page for peval:
peval(1) peval(1)
NAME
peval
SYNOPSIS
peval [options] [<expression>]
DESCRIPTION
peval is a low level policy evaluation tool that can be used to write
router configuration generators. peval, in a command loop, inputs pol‐
icy expressions, expands the AS sets, route sets, filter sets, AS num‐
bers (unless specified otherwise using command line options), evaluates
the resulting expression and outputs the result. Instead of a command
loop, the expression can be given as an argument.
By default peval evaluates the expression for ipv4 unicast address fam‐
ily. Also the list of address families can be specified in order to
restrict the results. The syntax is: afi <afi_list> <mp-filter>.
<afi_list> is a comma separated list of address families. The supported
ones are: ipv4, ipv4.unicast (same as ipv4), ipv4.multicast, ipv6,
ipv6.unicast (same as ipv6), ipv6.multicast, any.unicast (ipv4.unicast,
ipv6.unicast), any.multicast (ipv4.multicast, ipv6.multicast), any
(ipv4.unicast, ipv4.multicast, ipv6.unicast, ipv6.multicast). If the
results are to be restricted to uncomparable address families (ipv4,
ipv6), in the output they will be joined using ’OR’ clause.
<mp-filter> is a valid RPSLng filter over AS-numbers, ipv4/ipv6 pre‐
fixes, range operators, filter-sets, route-sets, as-sets and logical
operators. For more details about mp-filter format see RPSLng documen‐
tation.
IRRToolSet COMMON OPTIONS
-help Print summary of command-line options and abort.
-T [whois_query | whois_response | input | all]
Trace the argument. Useful for debugging.
-D <integer>
Print debugging messages of debug channel <integer> (if
compiled with DEBUG defined).
-version
Print the version number and quit.
-h <host-name>
Establish a whois connection to host <host-name>. The
default is whois.radb.net.
-p <port-no>
Establish a whois connection to port <port-no>. The
default is 43.
-protocol <protocol>
Use the <protocol> to connect to the IRR server. <proto‐
col> can be irrd(rawhoisd), ripe(bird), and ripe_perl.
The default is irrd. The ripe_perl option should be used
with the old ripe server.
-s <source-list>
Consider the sources specified in the comma separated
<source-list>. If an object is defined in multiple
sources in <source-list>, peval uses the definition first
encountered in <source-list> from left to right.
-f <file-name>
IRR cache file. You can have any RPSL object in this
file, except route objects. They will override these
objects in IRR. This option is intended for private
objects, or to test new public objects before publishing.
You can specify more than one cache file by specifying
this option repeatedly.
-rusage
Print resource usage upon completion.
-prompt <string>
Set the interactive prompt to <string>.
-ignore_errors
Do not print error and warning messages due to communica‐
tion to the database server or parsing policy objects.
-report_errors
Print error and warning messages due to communication to
the database server or parsing policy objects.
OTHER OPTIONS
-no-as-set
Do not expand AS sets into AS numbers.
-no-route-set
Do not expand route sets into prefixes.
-no-as Do not expand AS numbers into prefixes.
-none Do not expand anything.
-symbolic
Do a prior symbolic evaluation, then do the expansions
and then re-evaluate. This may be faster for some poli‐
cies.
-compressed
Print prefix lists using the more specific operators.
Otherwise, an expression like 128.9.0.0/16^24 will result
in 256 prefixes being printed.
-e <expression>
Evaluate expression.
ENVIRONMENT VARIABLES
IRR_HOST
Specifies the IRR host to connect.
IRR_PORT
Specifies the IRR port number to connect.
IRR_SOURCES
Specifies the source list (comma separated) to consider.
Command line options take precedence over environment variables.
EXAMPLES
Perform only symbolic evaluation:
% ./peval -none
peval> (AS1 OR AS2) AND AS1
((AS1))
peval> AS1 AND NOT AS1
NOT ANY
peval>
Expand AS macros and evaluate:
% ./peval -no-as AS-ANSCT
((AS1326 AS2002 AS2538 AS2752 AS3723))
Expand all and evaluate (e.g. multihomed routes to AS1220 and AS226):
% ./peval ’AS1220 AND AS226’
({192.237.125.0/24, 192.92.56.0/24, 196.2.41.0/24, 196.2.40.0/24})
Evaluate the filter for ipv4 and ipv6 address families:
% ./peval ’afi ipv6, ipv4 rs-rpslng’
({1001:0:0:0:0:0:0:0/35, 1:0:0:0:0:0:0:0/35})
OR ({1.0.0.0/8, 1.2.3.0/24})
ERROR AND WARNING MESSAGES
Error: Internal error.
Fails if couldn’t evaluate the filter to resulting normal
expression.
Unknown protocol!
Connection to IRR server failed. This can be caused by various
reasons, please see Errors manpage, IRR Communication errors.
***Error: badly formed filter.
syntax error in RPSL filter specification.
For more error descriptions, please see Errors manual page.
AUTHORS
Cengiz Alaettinoglu <cengiz@isi.edu>
Katie Petrusha <katie@ripe.net>
