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refactor to make check_no/acl/only share code between device and node paths

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This commit is contained in:
Oliver Gorwits
2014-02-10 22:32:35 +00:00
parent 82e50a3fda
commit 81fe9bd014
8 changed files with 218 additions and 282 deletions
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2
Netdisco/lib/App/Netdisco/Core/Arpnip.pm
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@@ -3,7 +3,7 @@ package App::Netdisco::Core::Arpnip;
use Dancer qw/:syntax :script/;
use Dancer::Plugin::DBIC 'schema';
use App::Netdisco::Util::SanityCheck 'check_mac';
use App::Netdisco::Util::Node 'check_mac';
use App::Netdisco::Util::DNS ':all';
use NetAddr::IP::Lite ':lower';
use Time::HiRes 'gettimeofday';

2
Netdisco/lib/App/Netdisco/Core/Macsuck.pm
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@@ -4,7 +4,7 @@ use Dancer qw/:syntax :script/;
use Dancer::Plugin::DBIC 'schema';
use App::Netdisco::Util::PortMAC 'get_port_macs';
use App::Netdisco::Util::SanityCheck 'check_mac';
use App::Netdisco::Util::Node 'check_mac';
use App::Netdisco::Util::SNMP 'snmp_comm_reindex';
use Time::HiRes 'gettimeofday';

2
Netdisco/lib/App/Netdisco/Core/Nbtstat.pm
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@@ -3,7 +3,7 @@ package App::Netdisco::Core::Nbtstat;
use Dancer qw/:syntax :script/;
use Dancer::Plugin::DBIC 'schema';
use App::Netdisco::Util::SanityCheck 'check_mac';
use App::Netdisco::Util::Node 'check_mac';
use NetAddr::IP::Lite ':lower';
use Time::HiRes 'gettimeofday';
use Net::NBName;

115
Netdisco/lib/App/Netdisco/Util/Device.pm
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@@ -2,17 +2,14 @@ package App::Netdisco::Util::Device;
use Dancer qw/:syntax :script/;
use Dancer::Plugin::DBIC 'schema';
use NetAddr::IP::Lite ':lower';
use App::Netdisco::Util::DNS 'hostname_from_ip';
use App::Netdisco::Util::Permission 'check_acl';
use base 'Exporter';
our @EXPORT = ();
our @EXPORT_OK = qw/
get_device
check_acl
check_no
check_only
check_device_no
check_device_only
is_discoverable
is_arpnipable
is_macsuckable
@@ -60,87 +57,7 @@ sub get_device {
->find_or_new({ip => $ip});
}
=head2 check_acl( $ip, \@config )
Given the IP address of a device, returns true if any of the items in C<<
\@config >> matches that device, otherwise returns false.
Normally you use C<check_no> and C<check_only>, passing the name of the
configuration setting to load. This helper instead requires not the name of
the setting, but its value.
=cut
sub check_acl {
my ($ip, $config) = @_;
my $device = get_device($ip) or return 0;
my $addr = NetAddr::IP::Lite->new($device->ip);
foreach my $item (@$config) {
if (ref qr// eq ref $item) {
my $name = hostname_from_ip($addr->addr) or next;
return 1 if $name =~ $item;
next;
}
if ($item =~ m/^([^:]+)\s*:\s*([^:]+)$/) {
my $prop = $1;
my $match = $2;
# if not in storage, we can't do much with device properties
next unless $device->in_storage;
# lazy version of vendor: and model:
if ($device->can($prop) and defined $device->$prop
and $device->$prop =~ m/^$match$/) {
return 1;
}
next;
}
if ($item =~ m/([a-f0-9]+)-([a-f0-9]+)$/i) {
my $first = $1;
my $last = $2;
if ($item =~ m/:/) {
next unless $addr->bits == 128;
$first = hex $first;
$last = hex $last;
(my $header = $item) =~ s/:[^:]+$/:/;
foreach my $part ($first .. $last) {
my $ip = NetAddr::IP::Lite->new($header . sprintf('%x',$part) . '/128')
or next;
return 1 if $ip == $addr;
}
}
else {
next unless $addr->bits == 32;
(my $header = $item) =~ s/\.[^.]+$/./;
foreach my $part ($first .. $last) {
my $ip = NetAddr::IP::Lite->new($header . $part . '/32')
or next;
return 1 if $ip == $addr;
}
}
next;
}
my $ip = NetAddr::IP::Lite->new($item)
or next;
next unless $ip->bits == $addr->bits;
return 1 if $ip->contains($addr);
}
return 0;
}
=head2 check_no( $ip, $setting_name )
=head2 check_device_no( $ip, $setting_name )
Given the IP address of a device, returns true if the configuration setting
C<$setting_name> matches that device, else returns false. If the setting
@@ -182,16 +99,17 @@ To match no devices we recommend an entry of "C<localhost>" in the setting.
=cut
sub check_no {
sub check_device_no {
my ($ip, $setting_name) = @_;
my $device = get_device($ip) or return 0;
my $config = setting($setting_name) || [];
return 0 if not scalar @$config;
return check_acl($ip, $config);
return check_acl($device->ip, $config);
}
=head2 check_only( $ip, $setting_name )
=head2 check_device_only( $ip, $setting_name )
Given the IP address of a device, returns true if the configuration setting
C<$setting_name> matches that device, else returns false. If the setting
@@ -233,13 +151,14 @@ To match no devices we recommend an entry of "C<localhost>" in the setting.
=cut
sub check_only {
sub check_device_only {
my ($ip, $setting_name) = @_;
my $device = get_device($ip) or return 0;
my $config = setting($setting_name) || [];
return 1 if not scalar @$config;
return check_acl($ip, $config);
return check_acl($device->ip, $config);
}
=head2 is_discoverable( $ip, $device_type? )
@@ -270,10 +189,10 @@ sub is_discoverable {
}
return _bail_msg("is_discoverable: device matched discover_no")
if check_no($device, 'discover_no');
if check_device_no($device, 'discover_no');
return _bail_msg("is_discoverable: device failed to match discover_only")
unless check_only($device, 'discover_only');
unless check_device_only($device, 'discover_only');
# cannot check last_discover for as yet undiscovered devices :-)
return 1 if not $device->in_storage;
@@ -304,10 +223,10 @@ sub is_arpnipable {
my $device = get_device($ip) or return 0;
return _bail_msg("is_arpnipable: device matched arpnip_no")
if check_no($device, 'arpnip_no');
if check_device_no($device, 'arpnip_no');
return _bail_msg("is_arpnipable: device failed to match arpnip_only")
unless check_only($device, 'arpnip_only');
unless check_device_only($device, 'arpnip_only');
return _bail_msg("is_arpnipable: cannot arpnip an undiscovered device")
if not $device->in_storage;
@@ -338,10 +257,10 @@ sub is_macsuckable {
my $device = get_device($ip) or return 0;
return _bail_msg("is_macsuckable: device matched macsuck_no")
if check_no($device, 'macsuck_no');
if check_device_no($device, 'macsuck_no');
return _bail_msg("is_macsuckable: device failed to match macsuck_only")
unless check_only($device, 'macsuck_only');
unless check_device_only($device, 'macsuck_only');
return _bail_msg("is_macsuckable: cannot macsuck an undiscovered device")
if not $device->in_storage;

129
Netdisco/lib/App/Netdisco/Util/Node.pm
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@@ -3,13 +3,13 @@ package App::Netdisco::Util::Node;
use Dancer qw/:syntax :script/;
use Dancer::Plugin::DBIC 'schema';
use NetAddr::IP::Lite ':lower';
use App::Netdisco::Util::DNS 'hostname_from_ip';
use Net::MAC;
use App::Netdisco::Util::Permission 'check_acl';
use base 'Exporter';
our @EXPORT = ();
our @EXPORT_OK = qw/
check_node_acl
check_mac
check_node_no
check_node_only
is_nbtstatable
@@ -29,70 +29,97 @@ subroutines.
=head1 EXPORT_OK
=head2 check_node_acl( $ip, \@config )
=head2 check_mac( $device, $node, $port_macs? )
Given the IP address of a node, returns true if any of the items in C<<
\@config >> matches that node, otherwise returns false.
Given a Device database object and a MAC address, perform various sanity
checks which need to be done before writing an ARP/Neighbor entry to the
database storage.
Normally you use C<check_node_no> and C<check_node_only>, passing the name of the
configuration setting to load. This helper instead requires not the name of
the setting, but its value.
Returns false, and might log a debug level message, if the checks fail.
Returns a true value if these checks pass:
=over 4
=item *
MAC address is well-formed (according to common formats)
=item *
MAC address is not all-zero, broadcast, CLIP, VRRP or HSRP
=back
Optionally pass a cached set of Device port MAC addresses as the third
argument, in which case an additional check is added:
=over 4
=item *
MAC address does not belong to an interface on any known Device
=back
=cut
sub check_node_acl {
my ($ip, $config) = @_;
my $device = get_device($ip) or return 0;
my $addr = NetAddr::IP::Lite->new($device->ip);
sub check_mac {
my ($device, $node, $port_macs) = @_;
my $mac = Net::MAC->new(mac => $node, 'die' => 0, verbose => 0);
$port_macs ||= {};
foreach my $item (@$config) {
if (ref qr// eq ref $item) {
my $name = hostname_from_ip($addr->addr) or next;
return 1 if $name =~ $item;
next;
}
if ($item =~ m/([a-f0-9]+)-([a-f0-9]+)$/i) {
my $first = $1;
my $last = $2;
if ($item =~ m/:/) {
next unless $addr->bits == 128;
$first = hex $first;
$last = hex $last;
(my $header = $item) =~ s/:[^:]+$/:/;
foreach my $part ($first .. $last) {
my $ip = NetAddr::IP::Lite->new($header . sprintf('%x',$part) . '/128')
or next;
return 1 if $ip == $addr;
}
# incomplete MAC addresses (BayRS frame relay DLCI, etc)
if ($mac->get_error) {
debug sprintf ' [%s] check_mac - mac [%s] malformed - skipping',
$device->ip, $node;
return 0;
}
else {
next unless $addr->bits == 32;
(my $header = $item) =~ s/\.[^.]+$/./;
foreach my $part ($first .. $last) {
my $ip = NetAddr::IP::Lite->new($header . $part . '/32')
or next;
return 1 if $ip == $addr;
}
# lower case, hex, colon delimited, 8-bit groups
$node = lc $mac->as_IEEE;
}
next;
}
# broadcast MAC addresses
return 0 if $node eq 'ff:ff:ff:ff:ff:ff';
my $ip = NetAddr::IP::Lite->new($item)
or next;
next unless $ip->bits == $addr->bits;
# all-zero MAC addresses
return 0 if $node eq '00:00:00:00:00:00';
return 1 if $ip->contains($addr);
}
# CLIP
return 0 if $node eq '00:00:00:00:00:01';
# multicast
if ($node =~ m/^[0-9a-f](?:1|3|5|7|9|b|d|f):/) {
debug sprintf ' [%s] check_mac - multicast mac [%s] - skipping',
$device->ip, $node;
return 0;
}
# VRRP
if (index($node, '00:00:5e:00:01:') == 0) {
debug sprintf ' [%s] check_mac - VRRP mac [%s] - skipping',
$device->ip, $node;
return 0;
}
# HSRP
if (index($node, '00:00:0c:07:ac:') == 0) {
debug sprintf ' [%s] check_mac - HSRP mac [%s] - skipping',
$device->ip, $node;
return 0;
}
# device's own MACs
if (exists $port_macs->{$node}) {
debug sprintf ' [%s] check_mac - mac [%s] is device port - skipping',
$device->ip, $node;
return 0;
}
return 1;
}
=head2 check_node_no( $ip, $setting_name )
Given the IP address of a node, returns true if the configuration setting

107
Netdisco/lib/App/Netdisco/Util/Permission.pm Normal file
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@@ -0,0 +1,107 @@
package App::Netdisco::Util::Permission;
use Dancer qw/:syntax :script/;
use Dancer::Plugin::DBIC 'schema';
use Scalar::Util 'blessed';
use NetAddr::IP::Lite ':lower';
use base 'Exporter';
our @EXPORT = ();
our @EXPORT_OK = qw/check_acl/;
our %EXPORT_TAGS = (all => \@EXPORT_OK);
=head1 NAME
App::Netdisco::Util::Permission
=head1 DESCRIPTION
Helper subroutines to support parts of the Netdisco application.
There are no default exports, however the C<:all> tag will export all
subroutines.
=head1 EXPORT_OK
=head2 check_acl( $ip, \@config )
Given an IP address, returns true if any of the items in C<< \@config >>
matches that address, otherwise returns false.
Normally you use C<check_no> and C<check_only>, passing the name of the
configuration setting to load. This helper instead requires not the name of
the setting, but its value.
=cut
sub check_acl {
my ($thing, $config) = @_;
my $real_ip = (blessed $thing ? $thing->ip : $thing);
my $addr = NetAddr::IP::Lite->new($real_ip);
foreach my $item (@$config) {
if (ref qr// eq ref $item) {
my $name = hostname_from_ip($addr->addr) or next;
return 1 if $name =~ $item;
next;
}
if ($item =~ m/^([^:]+)\s*:\s*([^:]+)$/) {
my $prop = $1;
my $match = $2;
# if not in storage, we can't do much with device properties
next unless blessed $thing and $thing->in_storage;
# lazy version of vendor: and model:
if ($thing->can($prop) and defined $thing->$prop
and $thing->$prop =~ m/^$match$/) {
return 1;
}
next;
}
if ($item =~ m/([a-f0-9]+)-([a-f0-9]+)$/i) {
my $first = $1;
my $last = $2;
if ($item =~ m/:/) {
next unless $addr->bits == 128;
$first = hex $first;
$last = hex $last;
(my $header = $item) =~ s/:[^:]+$/:/;
foreach my $part ($first .. $last) {
my $ip = NetAddr::IP::Lite->new($header . sprintf('%x',$part) . '/128')
or next;
return 1 if $ip == $addr;
}
}
else {
next unless $addr->bits == 32;
(my $header = $item) =~ s/\.[^.]+$/./;
foreach my $part ($first .. $last) {
my $ip = NetAddr::IP::Lite->new($header . $part . '/32')
or next;
return 1 if $ip == $addr;
}
}
next;
}
my $ip = NetAddr::IP::Lite->new($item)
or next;
next unless $ip->bits == $addr->bits;
return 1 if $ip->contains($addr);
}
return 0;
}
1;

13
Netdisco/lib/App/Netdisco/Util/SNMP.pm
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@@ -1,7 +1,8 @@
package App::Netdisco::Util::SNMP;
use Dancer qw/:syntax :script/;
use App::Netdisco::Util::Device qw/get_device check_acl check_no/;
use App::Netdisco::Util::Device qw/get_device check_device_no/;
use App::Netdisco::Util::Permission qw/check_acl/;
use SNMP::Info;
use Try::Tiny;
@@ -75,7 +76,7 @@ sub _snmp_connect_generic {
);
# an override for bulkwalk
$snmp_args{BulkWalk} = 0 if check_no($device, 'bulkwalk_no');
$snmp_args{BulkWalk} = 0 if check_device_no($device, 'bulkwalk_no');
# further protect against buggy Net-SNMP, and disable bulkwalk
if ($snmp_args{BulkWalk}
@@ -92,9 +93,9 @@ sub _snmp_connect_generic {
# which SNMP versions to try and in what order
my @versions =
( check_no($device->ip, 'snmpforce_v3') ? (3)
: check_no($device->ip, 'snmpforce_v2') ? (2)
: check_no($device->ip, 'snmpforce_v1') ? (1)
( check_device_no($device->ip, 'snmpforce_v3') ? (3)
: check_device_no($device->ip, 'snmpforce_v2') ? (2)
: check_device_no($device->ip, 'snmpforce_v1') ? (1)
: (reverse (1 .. (setting('snmpver') || 3))) );
# use existing or new device class
@@ -292,7 +293,7 @@ sub _build_communities {
if not $stanza->{tag}
and !exists $stanza->{community};
if ($stanza->{$mode} and check_acl($device, $stanza->{only})) {
if ($stanza->{$mode} and check_acl($device->ip, $stanza->{only})) {
if ($stored_tag and $stored_tag eq $stanza->{tag}) {
# last known-good by tag
unshift @communities, $stanza

118
Netdisco/lib/App/Netdisco/Util/SanityCheck.pm
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@@ -1,118 +0,0 @@
package App::Netdisco::Util::SanityCheck;
use Dancer qw/:syntax :script/;
use Dancer::Plugin::DBIC 'schema';
use App::Netdisco::Util::PortMAC ':all';
use Net::MAC;
use base 'Exporter';
our @EXPORT = ();
our @EXPORT_OK = qw/ check_mac /;
our %EXPORT_TAGS = (all => \@EXPORT_OK);
=head1 NAME
App::Netdisco::Util::SanityCheck
=head1 DESCRIPTION
Helper subroutines to support parts of the Netdisco application.
There are no default exports, however the C<:all> tag will export all
subroutines.
=head1 EXPORT_OK
=head2 check_mac( $device, $node, $port_macs? )
Given a Device database object and a MAC address, perform various sanity
checks which need to be done before writing an ARP/Neighbor entry to the
database storage.
Returns false, and might log a debug level message, if the checks fail.
Returns a true value if these checks pass:
=over 4
=item *
MAC address is well-formed (according to common formats)
=item *
MAC address is not all-zero, broadcast, CLIP, VRRP or HSRP
=back
Optionally pass a cached set of Device port MAC addresses as the third
argument, in which case an additional check is added:
=over 4
=item *
MAC address does not belong to an interface on any known Device
=back
=cut
sub check_mac {
my ($device, $node, $port_macs) = @_;
my $mac = Net::MAC->new(mac => $node, 'die' => 0, verbose => 0);
$port_macs ||= {};
# incomplete MAC addresses (BayRS frame relay DLCI, etc)
if ($mac->get_error) {
debug sprintf ' [%s] check_mac - mac [%s] malformed - skipping',
$device->ip, $node;
return 0;
}
else {
# lower case, hex, colon delimited, 8-bit groups
$node = lc $mac->as_IEEE;
}
# broadcast MAC addresses
return 0 if $node eq 'ff:ff:ff:ff:ff:ff';
# all-zero MAC addresses
return 0 if $node eq '00:00:00:00:00:00';
# CLIP
return 0 if $node eq '00:00:00:00:00:01';
# multicast
if ($node =~ m/^[0-9a-f](?:1|3|5|7|9|b|d|f):/) {
debug sprintf ' [%s] check_mac - multicast mac [%s] - skipping',
$device->ip, $node;
return 0;
}
# VRRP
if (index($node, '00:00:5e:00:01:') == 0) {
debug sprintf ' [%s] check_mac - VRRP mac [%s] - skipping',
$device->ip, $node;
return 0;
}
# HSRP
if (index($node, '00:00:0c:07:ac:') == 0) {
debug sprintf ' [%s] check_mac - HSRP mac [%s] - skipping',
$device->ip, $node;
return 0;
}
# device's own MACs
if (exists $port_macs->{$node}) {
debug sprintf ' [%s] check_mac - mac [%s] is device port - skipping',
$device->ip, $node;
return 0;
}
return 1;
}
1;