| JUNOS::Device - Implements a remote JUNOScript device |
JUNOS::Device - Implements a remote JUNOScript device
Here is example that makes a telnet connection to router11, then updates the router11's configuration with the configuration from $xmlfile. It also deals with error conditions and gracefully shuts down the telnet session.
use JUNOS::Device;
sub graceful_shutdown
{
my ($jnx, $req, $state, $success) = @_;
if ($state >= STATE_CONFIG_LOADED) {
print "Rolling back configuration ...\n";
$jnx->load_configuration(rollback => 0);
}
if ($state >= STATE_LOCKED) {
print "Unlocking configuration database ...\n";
$jnx->unlock_configuration();
}
if ($state >= STATE_CONNECTED) {
print "Disconnecting from the router ...\n";
$jnx->request_end_session();
$jnx->disconnect();
}
if ($success) {
die "REQUEST $req SUCCEEDED\n";
} else {
die "REQUEST $req FAILED\n";
}
}
$jnx = new JUNOS::Device(hostname => "router11",
login => "johndoe",
password => "secret",
access => "telnet");
unless ( ref $jnx ) {
die "ERROR: can't connect to $deviceinfo{hostname}.\n";
}
print "Locking configuration database ...\n";
my $res = $jnx->lock_configuration();
my $err = $res->getFirstError();
if ($err) {
print "ERROR: $deviceinfo{hostname}: can't lock configuration. Reason: $err->{message}.\n";
graceful_shutdown($jnx, $xmlfile, STATE_CONNECTED, REPORT_FAILURE);
}
#
# Load the configuration
#
print "Loading configuration from $xmlfile ...\n";
if (! -f $xmlfile) {
print "ERROR: Cannot load configuration in $xmlfile\n";
graceful_shutdown($jnx, $xmlfile, STATE_LOCKED, REPORT_FAILURE);
}
my $parser = new XML::DOM::Parser;
my $doc = $parser->parsefile($xmlfile);
unless ( ref $doc ) {
print "ERROR: Cannot parse $xmlfile, check to make sure the XML data is well-formed\n";
graceful_shutdown($jnx, $xmlfile, STATE_LOCKED, REPORT_FAILURE);
}
$res = $jnx->load_configuration(configuration => $doc);
unless ( ref $res ) {
print "ERROR: can't load the configuration from $xmlfile\n";
graceful_shutdown($jnx, $xmlfile, STATE_LOCKED, REPORT_FAILURE);
}
$err = $res->getFirstError();
if ($err) {
print "ERROR: can't load the configuration from $xmlfile. Reason: $err->{message}\n";
graceful_shutdown($jnx, $xmlfile, STATE_CONFIG_LOADED, REPORT_FAILURE);
}
Here is another example. It retrieves 'show chassis hardware' information and transforms the input with XSLT.
# connect TO the JUNOScript server
$jnx = new JUNOS::Device(hostname => "router11",
login => "johndoe",
password => "secret",
access => "telnet");
unless ( ref $jnx ) {
die "ERROR: $deviceinfo{hostname}: can't connect.\n";
}
# send the command and receive a XML::DOM object
my $res = $jnx->get_chassis_inventory(detail => 1);
unless ( ref $res ) {
die "ERROR: $deviceinfo{hostname}: can't execute command $query.\n";
}
# Check and see if there were any errors in executing the command.
# If all is well, output the response using XSLT.
my $err = $res->getFirstError();
if ($err) {
print STDERR "ERROR: $deviceinfo{'hostname'} - ", $err->{message}, "\n";
} else {
#
# Now do the transformation using XSLT.
#
my $xmlfile = "$deviceinfo{hostname}.xml";
$res->printToFile($xmlfile);
my $nm = $res->translateXSLtoRelease('xmlns:lc', $xslfile, "$xslfile.tmp");
if ($nm) {
my $command = "xsltproc $nm $deviceinfo{hostname}.xml";
system($command);
} else {
print STDERR "ERROR: Invalid XSL File $xslfile\n";
}
}
# always close the connection
$jnx->request_end_session();
$jnx->disconnect();
This module implements an object oriented interface to the JUNOScript (tm) XML-based API supported by Juniper Networks. Objects of this class represent the local side of connection to a Juniper Networks device running JUNOS, over which the JUNOScript protocol will be spoken. JUNOScript is described in detail in the JUNOScript API Guide and Reference.
new(%ARGS)
The constructor accepts a hash table %ARGS containing the following keys:
hostname
Name of Juniper box to connect to.
login
Username to log into box as.
password
Password for login username.
access
Access method - can be 'telnet' or 'ssh' or 'ssl'.
Do_Not_Connect
if set to true a connection to a Juniper box
will not be establish upon object creation. You then
must call the 'connect' function to explicitly create the
connection
namespace-action
if you don't want to deal with namespace, just set this
to either 'remove-namespace' or 'update-namespace'. This is
handy when you don't want to care about declaring the XML namespace
in your XSL file(s). 'remove-namespace' means removing all
namespace declarations and schemaLocation from the the responses.
'update-namespace' means remove all namespaces and replace
schemaLocation with noNamespaceSchemaLocation.
Additional keys specific to the access method are processed by the access method object (e.g. JUNOS::Access::telnet). See the perldoc of the access method class for the definition of these additional keys.
command($COMMAND)
Send the raw command string from $COMMAND to the remote Juniper box. This is a 'mostly unsupported' way of getting to any JUNOS command that is currently unsupported in JUNOScript. Caveat Coder.
typically called by the constructor. If you set 'Do_Not_Connect' to be true you must call this function yourself.
disconnect()
Disconnects from a JUNOScript server & performs other clean-up related to this conneciton. This function will also be called if your JUNOS::Device object goes out of scope or is undef'ed.
getErrors()
getFirstError()
getErrors() and getFirstError() are available for the application to
retrieve all of the errors occured within the last JUNOS::Device method
invocation. The application may wish to print these error messages in
log file or display on a different error window. getErrors() returns
a reference to all the errors and getFirstError() returns the earliest
error that triggered the failure. These methods can be called after
a JUNOS::Device method has failed.
Note: These errors normally go to the standard output unless the Always category is in JUNOS::Trace is disabled. Unless you want the errors to go someplace other than the standard output, you don't need to call these methods.
An example of using getFirstError:
unless($jnx->connect()) {
my $error = $jnx->getFirstError();
print ERRORLOG (``ERROR: $error\n'');
}
An example of using getErrors:
unless($jnx->connect()) {
my @errors = @{$jnx->getErrors()};
for my $error (@errors) {
print ERRORLOG (``ERROR: $error\n'');
}
}
request($REQUEST)
You should call <JUNOScript command> functions - which eventually utilize this function - you should not call this directly!
Sends a request in $REQUEST to a Juniper box and returns the result. In a scalar context a JUNOS::Response object is returned. In an array context an array consisting of the XML::DOM::Document object and the raw JUNOS::Response object containing the enclosing <rpc-reply> tags. The parameter is the name of the JUNOScript function to be called on the remote Juniper box.
<JUNOScript command>
You may call any JUNOScript command via the JUNOS::Device Handle. See 'request' function for return values.
These methods are available when connecting to a JUNOS 5.1 router. they can take two types of arguments or zero arguments:
1. 'toggle' - argument is present or not. For example the 'extensive' argument to the 'get_interface_information' method: get_interface_information(extensive => 1);
2. 'string' - a string argument For example the 'slot' argument to the 'get_pic_information' method: get_pic_information(slot => ``2'');
method is followed by a list of accepted arguments and their types
if it has any.
get_accounting_profile_information
profile => STRING
get_accounting_record_information
profile => STRING
since => STRING
utc_timestamp => TOGGLE
get_chassis_inventory
detail => TOGGLE
extensive => TOGGLE
get_environment_information
get_feb_information
get_firmware_information
get_fpc_information
get_interface_information
brief => TOGGLE
destination_class => STRING
detail => TOGGLE
extensive => TOGGLE
interface_name => STRING
media => TOGGLE
queue => TOGGLE
snmp_index => STRING
statistics => TOGGLE
terse => TOGGLE
get_pic_information
slot => STRING
get_route_engine_information
slot => STRING
get_scb_information
get_sfm_information
get_snmp_information
get_ssb_information
slot => STRING
request_halt
at => STRING
in => STRING
media => STRING
message => STRING
request_reboot
at => STRING
in => STRING
media => STRING
message => STRING
get_bgp_group_information
group_name => STRING
get_bgp_neighbor_information
neighbor_address => STRING
get_bgp_summary_information
get_instance_information
name => STRING
get_instance_summary_information
get_isis_adjacency_information
brief => STRING
detail => STRING
instance => STRING
system_id => STRING
get_isis_database_information
brief => STRING
detail => STRING
extensive => STRING
instance => STRING
system_id => STRING
get_isis_interface_information
brief => STRING
detail => STRING
instance => STRING
interface_name => STRING
get_isis_route_information
instance => STRING
get_isis_spf_information
get_isis_statistics_information
instance => STRING
get_l2vpn_connection_information
brief => STRING
down => STRING
extensive => STRING
history => STRING
instance => STRING
local_site => STRING
remote_site => STRING
status => STRING
up => STRING
up_down => STRING
get_mpls_admin_group_information
get_mpls_cspf_information
get_mpls_interface_information
get_mpls_lsp_information
brief => STRING
detail => STRING
down => STRING
egress => STRING
extensive => STRING
ingress => STRING
name => STRING
statistics => STRING
terse => STRING
transit => STRING
up => STRING
get_mpls_path_information
path => STRING
get_ospf_database_information
advertising_router => STRING
area => STRING
asbrsummary => STRING
brief => STRING
detail => STRING
extensive => STRING
extern => STRING
instance => STRING
lsa_id => STRING
netsummary => STRING
network => STRING
nssa => STRING
router => STRING
summary => STRING
get_ospf_interface_information
brief => STRING
detail => STRING
extensive => STRING
instance => STRING
interface_name => STRING
get_ospf_io_statistics_information
get_ospf_log_information
instance => STRING
get_ospf_neighbor_information
brief => STRING
detail => STRING
extensive => STRING
instance => STRING
neighbor => STRING
get_ospf_route_information
abr => STRING
asbr => STRING
detail => STRING
extern => STRING
instance => STRING
inter => STRING
intra => STRING
get_ospf_statistics_information
instance => STRING
get_rsvp_interface_information
brief => STRING
detail => STRING
get_rsvp_neighbor_information
get_rsvp_session_information
brief => STRING
detail => STRING
down => STRING
egress => STRING
ingress => STRING
interface => STRING
lsp => STRING
name => STRING
nolsp => STRING
terse => STRING
transit => STRING
up => STRING
get_rsvp_statistics_information
get_rsvp_version_information
get_ted_database_information
brief => STRING
detail => STRING
extensive => STRING
system_id => STRING
get_ted_link_information
brief => STRING
detail => STRING
get_ted_protocol_information
brief => STRING
detail => STRING
request_end_session
request_package_add
delay_restart => TOGGLE
force => TOGGLE
no_copy => TOGGLE
package_name => STRING
reboot => TOGGLE
request_package_delete
force => TOGGLE
package_name => STRING
JUNOS::Response
XML::DOM
JUNOS::Trace
JUNOScript API Guide (available at www.juniper.net)
JUNOScript API Reference (available at www.juniper.net)
Juniper Junoscript Perl Team, send bug reports, hints, tips, and suggestions to support@juniper.net.
Copyright (c) 2001-2002 Juniper Networks, Inc. All rights reserved.
| JUNOS::Device - Implements a remote JUNOScript device |