6c0b5973ea
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@7739 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
524 lines
21 KiB
Perl
524 lines
21 KiB
Perl
#!/usr/bin/perl
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# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT::MacMap;
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use strict;
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use xCAT::Table;
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use xCAT::Utils;
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use xCAT::MsgUtils;
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use IO::Select;
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use IO::Handle;
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use Sys::Syslog;
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use Data::Dumper;
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use POSIX qw/WNOHANG/;
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use SNMP;
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my %cisco_vlans; #Special hash structure to reflect discovered VLANS on Cisco equip
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#use IF-MIB (1.3.6.1.2.1.2) for all switches
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# 1.3.6.1.2.1.31.1.1 - ifXtable
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# 1.3.6.1.2.1.31.1.1.1.1.N = name - ifName
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#Using BRIDGE-MIB for most switches( 1.3.6.1.2.1.17 )
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# 1.3.6.1.2.1.17.1.4 - dot1dBasePortTable
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# 1.3.6.1.2.1.17.1.4.1.1.X = N - dot1dBasePort
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# 1.3.6.1.2.1.17.4.3 - dot1dTpFdbTable #FAILS on FORCE10,
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#
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#If particular result fails, fallback to Q-BRIDGE-MIB for Force10 (1.3.6.1.2.1.17.7)
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# 1.3.6.1.2.1.17.7.1.2.2 - dot1qTpFdbTable
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sub namesmatch {
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=pod
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MacMap attempts to do it's best to determine whether or not a particular SNMP description of
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a port matches the user specified value in the configuration. Generally, if the configuration
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consists of non-stacked switches without line cards, the user should only need to specify the
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port number without any characters or / characters. If the configuration contains line cards
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or stacked switches, use of that particular switch's appropriate / syntax in generally called
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for. The exception being stacked SMC 8848 switches, in which all ports are still single
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numbers, and the ports on the second switch begin at 57.
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If difficulty is encountered, or a switch is attempted with a format that doesn't match any
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existing rule, it is recommended to use snmpwalk on the switch with the .1.3.6.1.2.1.31.1.1.1.1
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OID, and have the switch table port value match exactly the format suggested by that OID.
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=cut
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my $namepercfg = shift;
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my $namepersnmp = shift;
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if ($namepercfg eq $namepersnmp) {
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return 1; # They matched perfectly
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}
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#Begin guessing, first off, all tested scenarios have likely correct guesses ending
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#in the cfg string, with some non-numeric prefix before it.
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#3com convention, contributed by Aaron Knister
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if ( $namepersnmp =~ /^RMON Port (0?)(\d+) on unit \d+/ ) {
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if ( $2 =~ $namepercfg ) {
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return 1;
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}
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}
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# dell 6248 convention
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if ( $namepersnmp =~ /^Unit \d Port (\d+)$/ ) {
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if ( $1 eq $namepercfg ) {
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return 1;
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}
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}
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unless ($namepersnmp =~ /[^0123456789]$namepercfg\z/) {
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#Most common case, won't match at all
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return 0;
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}
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#stop contemplating vlan, Nu, stacking ports, and console interfaces
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if (($namepersnmp =~ /vl/i) or ($namepersnmp =~ /Nu/) or ($namepersnmp =~ /onsole/) or ($namepersnmp =~ /Stack/)) {
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return 0;
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}
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#broken up for code readablitiy, don't check port channel numbers or CPU
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#have to distinguish betweer Port and Po and PortChannel
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if (($namepersnmp !~ /Port #/) and ($namepersnmp !~ /Port\d/) and ($namepersnmp =~ /Po/) or ($namepersnmp =~ /po\d/) or ($namepersnmp =~ /XGE/) or ($namepersnmp =~ /LAG/) or ($namepersnmp =~ /CPU/)) {
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return 0;
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}
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#don't contemplate ManagementEthernet
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if (($namepersnmp =~ /Management/)) {
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return 0;
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}
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#The blacklist approach has been exhausted. For now, assuming that means good,
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#if something ambiguous happens, the whitelist would have been:
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#'Port','Port #','/' (if namepercfg has no /, then / would be...),
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#'Gi','Te','GigabitEthernet','TenGigabitEthernet'
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return 1;
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}
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sub new {
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my $self = {};
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# Since switch.pm and lsslp.pm both create a MacMap object, SNMP is still required at xcatd start up.
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# So we are going back to "use SNMP;" at the top of this file so RPM will automatically generate a prereq.
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#eval { require SNMP; };
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#if ($@) { die "SNMP support required to use MacMAP"; }
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my $proto = shift;
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my $class = ref($proto) || $proto;
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bless ($self, $class);
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return $self;
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}
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sub rvlan {
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#The Q-BRIDGE way:
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#IF-MIB for ifName<->ifIndex (much like the find_mac code)
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#BRIDGE-MIB for ifIndex<->BridgeIndex (again, familiar)
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#Q-BRIDGE-MIB for vlanId<->vlanIndex
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# and vlanIndex<->dot1qVlanStaticUntaggedPorts
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# and vlanIndex<->dot1qVlanStaticEgressPorts (tagged allowed ports)
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# for changing the PVID of a port, the current bitfields must be read, the offset into the bitfield of the correct bridge index must be zero everywhere but vlan 1, then must be 1 in the target vlan. If it is zeroed in a vlan other than 1 without being 'oned' elsewhere, it reverts to vlan 1
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#that is the documented steps for brocade
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#some switches support vlan creation via qbridge, either via writing to the table or write to the row. SMC has write to non-existent row and vlanId==vlanIndex, which is logical. If a switches vlanIndex!=vlanId, QBridge doesnet' offer a clean injection point.
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#QBridge also has dot1qPvid, but wasn't writable in Brocade.. it is readable though, so can guide the read, mask out, mask in activity above
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#argument specification:
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# nodes => [ list reference of nodes to query/set ]
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# operation => "pvid=<vid> or vlan=<vid>" for now, addvlan= and delvlan= for tagged vlans, 'pvid', vlan, or stat without = checks current value
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my $self=shift;
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my $community = "public";
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$self->{sitetab} = xCAT::Table->new('site');
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my $tmp = $self->{sitetab}->getAttribs({key=>'snmpc'},'value');
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if ($tmp and $tmp->{value}) { $community = $tmp->{value} }
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my %args = @_;
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my $op=$args{operation};
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my $nodes=$args{nodes};
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#first order of business is to identify the target switches
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my $switchtab=xCAT::Table->new('switch',-create=>0);
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unless ($switchtab) { return; }
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my $switchents = $switchtab->getNodesAttribs($nodes,[qw/switch port/]);
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my $node;
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foreach $node (keys %$switchents) {
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my $entry;
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foreach $entry (@{$switchents->{$node}}) {
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$self->{switches}->{$entry->{switch}}->{$entry->{port}} = $node;
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}
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}
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my $switches=[keys %{$self->{switches}}];
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my $switchestab=xCAT::Table->new('switches',-create=>0);
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my @switchesents;
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if ($switchestab) {
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foreach (values %{$switchestab->getNodesAttribs($switches,[qw(switch snmpversion username password privacy auth)])}) {
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push @switchesents,@$_;
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}
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}
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$self->fill_switchparms(community=>$community,switchesents=>\@switchesents);
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my $switch;
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foreach $switch (keys %{$self->{switches}}) { #first we'll extract the lay of the land...
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$self->refresh_switch(undef,$community,$switch);
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unless ($self->{switchinfo}->{$switch}->{vlanidtoindex}) { #need vlan id to vlanindex map for qbridge unless cisco
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$self->scan_qbridge_vlans(switch=>$switch,community=>$community);
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}
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}
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#print Dumper($self->{switchinfo});
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# $self->{switchinfo}->{$switch}->{bridgeidxtoifname}->{$boid}=$portname;
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# $self->{switchinfo}->{$switch}->{ifnametobridgeidx}->{$portname}=$boid;
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$op =~ s/stat/pvid/;
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$op =~ s/vlan/pvid/;
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if ($op =~ /^addpvid/) { # add tagged vlan
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} elsif ($op =~ /delpvid/) { #remove tagged vlan
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} else { #native vlan query or set
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}
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}
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sub scan_qbridge_vlans {
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my $self = shift;
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my %args = @_;
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my $switch = $args{switch};
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my $session = $self->{switchsessions}->{$switch};
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$self->{switchinfo}->{vlanindextoid} = walkoid($session,'.1.3.6.1.2.1.17.7.1.4.2.1.3');
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foreach (keys %{$self->{switchinfo}->{vlanindextoid}}) {
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#TODO: try to scan
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}
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}
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sub find_mac {
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# This function is given a mac address, checks for given mac address
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# and returns undef if unable to find the node, and the nodename otherwise
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my $self = shift;
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my $mac = shift;
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my $cachedonly = shift;
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# For now HARDCODE (TODO, configurable?) a cache as stale after five minutes
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# Also, if things are changed in the config, our cache could be wrong,
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# invalidate on switch table write?
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if ($self->{mactable}->{lc($mac)} and ($self->{timestamp} > (time() - 300))) {
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my $reftbl = 0;
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foreach (keys %{$self->{mactable}}) {
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if ((lc($mac) ne $_) and ($self->{mactable}->{lc($mac)} eq $self->{mactable}->{$_})) {
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#$reftbl = 1;
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#Delete *possibly* stale data, without being heavy handed..
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#But if this mac indicates multiple nodes, leave it there
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if ( $self->{mactable}->{lc($mac)} !~ /,/)
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{
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delete $self->{mactable}->{$_};
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}
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}
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}
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unless ($reftbl) { return $self->{mactable}->{lc($mac)};}
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}
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#If requesting a cache only check or the cache is a mere 20 seconds old
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#don't bother querying switches
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if ($cachedonly or ($self->{timestamp} > (time() - 20))) { return undef; }
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$self->refresh_table; #not cached or stale cache, refresh
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if ($self->{mactable}->{lc($mac)}) {
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return $self->{mactable}->{lc($mac)};
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}
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return undef;
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}
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sub fill_switchparms {
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my $self = shift;
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my %args = @_;
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my $community=$args{community};
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$self->{switchparmhash}={};
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my @switchentries = @{$args{switchesents}};
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foreach (@switchentries) {
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my $curswitch=$_->{switch};
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$self->{switchparmhash}->{$curswitch}=$_;
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if ($_->{snmpversion}) {
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if ($_->{snmpversion} =~ /3/) { #clean up to accept things like v3 or ver3 or 3, whatever.
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$self->{switchparmhash}->{$curswitch}->{snmpversion}=3;
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unless ($_->{auth}) {
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$self->{switchparmhash}->{$curswitch}->{auth}='md5'; #Default to md5 auth if not specified but using v3
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}
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} elsif ($_->{snmpversion} =~ /2/) {
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$self->{switchparmhash}->{$curswitch}->{snmpversion}=2;
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} else {
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$self->{switchparmhash}->{$curswitch}->{snmpversion}=1; #Default to lowest common denominator, snmpv1
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}
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}
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unless (defined $_->{password}) { #if no password set, inherit the community
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$self->{switchparmhash}->{$curswitch}->{password}=$community;
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}
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}
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}
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sub refresh_table {
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my $self = shift;
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my $curswitch;
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$self->{mactable}={};
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$self->{switchtab} = xCAT::Table->new('switch', -create => 1);
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$self->{switchestab} = xCAT::Table->new('switches', -create => 1);
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my @switchentries=$self->{switchestab}->getAllNodeAttribs([qw(switch snmpversion username password privacy auth)]);
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my $community = "public";
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$self->{sitetab} = xCAT::Table->new('site');
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my $tmp = $self->{sitetab}->getAttribs({key=>'snmpc'},'value');
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if ($tmp and $tmp->{value}) { $community = $tmp->{value} }
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else { #Would warn here..
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}
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$self->{switchparmhash}={};
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foreach (@switchentries) {
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$curswitch=$_->{switch};
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$self->{switchparmhash}->{$curswitch}=$_;
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if ($_->{snmpversion}) {
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if ($_->{snmpversion} =~ /3/) { #clean up to accept things like v3 or ver3 or 3, whatever.
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$self->{switchparmhash}->{$curswitch}->{snmpversion}=3;
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unless ($_->{auth}) {
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$self->{switchparmhash}->{$curswitch}->{auth}='md5'; #Default to md5 auth if not specified but using v3
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}
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} elsif ($_->{snmpversion} =~ /2/) {
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$self->{switchparmhash}->{$curswitch}->{snmpversion}=2;
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} else {
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$self->{switchparmhash}->{$curswitch}->{snmpversion}=1; #Default to lowest common denominator, snmpv1
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}
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}
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unless (defined $_->{password}) { #if no password set, inherit the community
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$self->{switchparmhash}->{$curswitch}->{password}=$community;
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}
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}
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my %checked_pairs;
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my @entries = $self->{switchtab}->getAllNodeAttribs(['node','port','switch']);
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#Build hash of switch port names per switch
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$self->{switches} = {};
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foreach my $entry (@entries) {
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if (defined($entry->{switch}) and $entry->{switch} ne "" and defined($entry->{port}) and $entry->{port} ne "") {
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if ( !$self->{switches}->{$entry->{switch}}->{$entry->{port}})
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{
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$self->{switches}->{$entry->{switch}}->{$entry->{port}} = $entry->{node};
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}
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else
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{
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$self->{switches}->{$entry->{switch}}->{$entry->{port}} .= ",$entry->{node}";
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}
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} else {
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xCAT::MsgUtils->message("S","xCAT Table error:".$entry->{node}."Has missing or invalid switch.switch and/or switch.port fields");
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}
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}
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my $children = 0;
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my $inputs = new IO::Select;
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$SIG{CHLD}= sub { while(waitpid(-1,WNOHANG) > 0) { $children-- } };
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foreach my $entry (@entries) {
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if ($checked_pairs{$entry->{switch}}) {
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next;
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}
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$checked_pairs{$entry->{switch}}=1;
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pipe my $child,my $parent;
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$child->autoflush(1);
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$parent->autoflush(1);
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$children++;
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my $cpid = xCAT::Utils->xfork;
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unless (defined $cpid) { die "Cannot fork" };
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if ($cpid == 0) {
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close($child);
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$self->refresh_switch($parent,$community,$entry->{switch});
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exit(0);
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}
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close($parent);
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$inputs->add($child);
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}
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while($children) {
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$self->handle_output($inputs);
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}
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while ($self->handle_output($inputs)) {}; #Drain the pipes
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$self->{timestamp}=time;
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}
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sub handle_output {
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my $self = shift;
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my $inputs = shift;
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my @readied = $inputs->can_read(1);
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my $rc = @readied;
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my $ready;
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foreach $ready (@readied) {
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my $line = <$ready>;
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unless ($line) {
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$inputs->remove($ready);
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close($ready);
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next;
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}
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$line =~ m/^([^|]*)\|(.*)/;
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$self->{mactable}->{$1}=$2;
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}
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return $rc;
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}
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sub walkoid {
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my $session = shift;
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my $oid = shift;
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my %namedargs = @_;
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my $retmap = undef;
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my $varbind = new SNMP::Varbind([$oid,'']);
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$session->getnext($varbind);
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if ($session->{ErrorStr}) {
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unless ($namedargs{silentfail}) {
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if ($namedargs{ciscowarn}) {
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xCAT::MsgUtils->message("S","Error communicating with ".$session->{DestHost}." (First attempt at indexing by VLAN failed, ensure that the switch has the vlan configured such that it appears in 'show vlan'): ".$session->{ErrorStr});
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} else {
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xCAT::MsgUtils->message("S","Error communicating with ".$session->{DestHost}.": ".$session->{ErrorStr});
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}
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}
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return undef;
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}
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my $count=0;
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while ($varbind->[0] =~ /^$oid\.?(.*)/) {
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$count++;
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if ($1) {
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$retmap->{$1.".".$varbind->[1]}=$varbind->[2]; #If $1 is set, means key should
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} else {
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$retmap->{$varbind->[1]}=$varbind->[2]; #If $1 is set, means key should
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}
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$session->getnext($varbind);
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}
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return $retmap;
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}
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sub getsnmpsession {
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#gets an snmp v3 session appropriate for a switch using the switches table for guidance on the hows
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#arguments: switch => $switchname and optionally vlan=> $vid if needed for community string indexing
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my $self = shift;
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my %args = @_;
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my $switch = $args{'switch'};
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my $vlanid = $args{'vlanid'};
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my $community = $args{'community'};
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my $session;
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my $snmpver='1';
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my $swent = $self->{switchparmhash}->{$switch};
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if ($swent) {
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$snmpver=$swent->{snmpversion};
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$community=$swent->{password};
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}
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if ($snmpver ne '3') {
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if ($vlanid) { $community .= '@'.$vlanid; }
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$session = new SNMP::Session(
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DestHost => $switch,
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Version => $snmpver,
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Community => $community,
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UseNumeric => 1
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);
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} else { #we have snmp3
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my %args= (
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DestHost => $switch,
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SecName => $swent->{username},
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AuthProto => uc($swent->{auth}),
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AuthPass => $community,
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Version => $snmpver,
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SecLevel => 'authNoPriv',
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UseNumeric => 1
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);
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if ($vlanid) { $args{Context}="vlan-".$vlanid; }
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if ($swent->{privacy}) {
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$args{SecLevel}='authPriv';
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$args{PrivProto} = uc($swent->{privacy});
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$args{PrivPass} = $community;
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}
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$session = new SNMP::Session(%args);
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}
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return $session;
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}
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sub refresh_switch {
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my $self = shift;
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my $output = shift;
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my $community = shift;
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my $switch = shift;
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#if ($error) { die $error; }
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my $session = $self->getsnmpsession('community'=>$community,'switch'=>$switch);
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unless ($session) { xCAT::MsgUtils->message("S","Failed to communicate with $switch"); return; }
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my $namemap = walkoid($session,'.1.3.6.1.2.1.31.1.1.1.1');
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#namemap is the mapping of ifIndex->(human readable name)
|
|
if ($namemap) {
|
|
my $ifnamesupport=0; #Assume broken ifnamesupport until proven good... (Nortel switch)
|
|
foreach (keys %{$namemap}) {
|
|
if ($namemap->{$_}) {
|
|
$ifnamesupport=1;
|
|
last;
|
|
}
|
|
}
|
|
unless ($ifnamesupport) {
|
|
$namemap=0;
|
|
}
|
|
}
|
|
unless ($namemap) { #Failback to ifDescr. ifDescr is close, but not perfect on some switches
|
|
$namemap = walkoid($session,'.1.3.6.1.2.1.2.2.1.2');
|
|
}
|
|
unless ($namemap) {
|
|
return;
|
|
}
|
|
#Above is valid without community string indexing, on cisco, we need it on the next one and onward
|
|
my $iftovlanmap = walkoid($session,'.1.3.6.1.4.1.9.9.68.1.2.2.1.2',silentfail=>1); #use cisco vlan membership mib to ascertain vlan
|
|
my $trunktovlanmap = walkoid($session,'.1.3.6.1.4.1.9.9.46.1.6.1.1.5',silentfail=>1); #for trunk ports, we are interested in the native vlan
|
|
#so we need cisco vtp mib too
|
|
my %vlans_to_check;
|
|
if (defined($iftovlanmap) or defined($trunktovlanmap)) { #We have a cisco, the intelligent thing is to do SNMP gets on the ports
|
|
$self->{switchinfo}->{$switch}->{vlanidtoindex}="NA";#mark this switch to ignore for qbridge scans
|
|
# that we can verify are populated per switch table
|
|
my $portid;
|
|
foreach $portid (keys %{$namemap}) {
|
|
my $portname;
|
|
my $switchport = $namemap->{$portid};
|
|
foreach $portname (keys %{$self->{switches}->{$switch}}) {
|
|
unless (namesmatch($portname,$switchport)) {
|
|
next;
|
|
}
|
|
if (not defined $iftovlanmap->{$portid} and not defined $trunktovlanmap->{$portid}) {
|
|
xCAT::MsgUtils->message("S","$portid missing from switch");
|
|
next;
|
|
}
|
|
if (defined $iftovlanmap->{$portid}) {
|
|
$vlans_to_check{"".$iftovlanmap->{$portid}} = 1; #cast to string, may not be needed
|
|
$self->{nodeinfo}->{$self->{switches}->{$switch}->{$portname}}->{vlans}->{$portname}=$iftovlanmap->{$portid};
|
|
} else { #given above if statement, brigetovlanmap *must* be defined*
|
|
$vlans_to_check{"".$trunktovlanmap->{$portid}} = 1; #cast to string, may not be needed
|
|
$self->{nodeinfo}->{$self->{switches}->{$switch}->{$portname}}->{vlans}->{$portname}=$trunktovlanmap->{$portid};
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
$vlans_to_check{'NA'}=1;
|
|
}
|
|
|
|
my $vlan;
|
|
my $iscisco=0;
|
|
foreach $vlan (sort keys %vlans_to_check) { #Sort, because if numbers, we want 1 first, because that vlan should not get communiy string indexed query
|
|
unless (not $vlan or $vlan eq 'NA' or $vlan eq '1') { #don't subject users to the context pain unless needed
|
|
$iscisco=1;
|
|
$session = $self->getsnmpsession('switch'=>$switch,'community'=>$community,'vlanid'=>$vlan);
|
|
}
|
|
unless ($session) { return; }
|
|
my $bridgetoifmap = walkoid($session,'.1.3.6.1.2.1.17.1.4.1.2',ciscowarn=>$iscisco); # Good for all switches
|
|
|
|
# my $mactoindexmap = walkoid($session,'.1.3.6.1.2.1.17.4.3.1.2');
|
|
my $mactoindexmap = walkoid($session,'.1.3.6.1.2.1.17.7.1.2.2.1.2',silentfail=>1);
|
|
unless (defined($mactoindexmap)) { #if no qbridge defined, try bridge mib, probably cisco
|
|
#$mactoindexmap = walkoid($session,'.1.3.6.1.2.1.17.7.1.2.2.1.2');
|
|
$mactoindexmap = walkoid($session,'.1.3.6.1.2.1.17.4.3.1.2',ciscowarn=>$iscisco);
|
|
} #Ok, time to process the data
|
|
foreach my $oid (keys %$namemap) {
|
|
#$oid =~ m/1.3.6.1.2.1.31.1.1.1.1.(.*)/;
|
|
my $ifindex = $oid;
|
|
my $portname;
|
|
my $switchport = $namemap->{$oid};
|
|
foreach $portname (keys %{$self->{switches}->{$switch}}) { # a little redundant, but
|
|
# computationally trivial
|
|
unless (namesmatch($portname,$switchport)) { next }
|
|
#if still running, we have match
|
|
foreach my $boid (keys %$bridgetoifmap) {
|
|
unless ($bridgetoifmap->{$boid} == $ifindex) { next; }
|
|
$self->{switchinfo}->{$switch}->{bridgeidxtoifname}->{$boid}=$portname;
|
|
$self->{switchinfo}->{$switch}->{ifnametobridgeidx}->{$portname}=$boid;
|
|
$self->{nodeinfo}->{$self->{switches}->{$switch}->{$portname}}->{portnametobridgeindex}->{$portname}=$boid;
|
|
$self->{nodeinfo}->{$self->{switches}->{$switch}->{$portname}}->{bridgeindextoportname}->{$boid}=$portname;
|
|
my $bridgeport = $boid;
|
|
foreach (keys %$mactoindexmap) {
|
|
if ($mactoindexmap->{$_} == $bridgeport) {
|
|
my @tmp = split /\./, $_;
|
|
my @mac = @tmp[-6 .. -1];
|
|
my $macstring=sprintf("%02x:%02x:%02x:%02x:%02x:%02x",@mac);
|
|
if ($output) {
|
|
printf $output "$macstring|%s\n",$self->{switches}->{$switch}->{$portname};
|
|
}
|
|
push @{$self->{nodeinfo}->{$self->{switches}->{$switch}->{$portname}}->{macs}->{$portname}},$macstring; #this could be used as getmacs sort of deal
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$self->{switchsessions}->{$switch}=$session; #save session for future use
|
|
}
|
|
|
|
|
|
|
|
|
|
1;
|