snmp.pm

snmp的源代码,已经在我的ubuntu下编译通过

   } elsif (ref($vars) =~ /SNMP::Varbind/) {
     $varbind_list_ref = [$vars];
   } elsif (ref($vars) =~ /ARRAY/) {
     $varbind_list_ref = [$vars];
     $varbind_list_ref = $vars if ref($$vars[0]) =~ /ARRAY/;
   } else {
     # my ($tag, $iid) = ($vars =~ /^((?:\.\d+)+|(?:\w+(?:\-*\w+)+))\.?(.*)$/);
     my ($tag, $iid) = ($vars =~ /^(.*?)\.?(\d+)+$/);
     $varbind_list_ref = [[$tag, $iid]];
   }

   my $cb = shift;

   @res = SNMP::_getbulk($this, $nonrepeaters, $maxrepetitions, $varbind_list_ref, $cb);

   return(wantarray() ? @res : $res[0]);
}

sub bulkwalk {
   my $this = shift;
   my $nonrepeaters = shift;
   my $maxrepetitions = shift;
   my $vars = shift;
   my ($varbind_list_ref, @res);

   if (ref($vars) =~ /SNMP::VarList/) {
      $varbind_list_ref = $vars;
   } elsif (ref($vars) =~ /SNMP::Varbind/) {
      $varbind_list_ref = [$vars];
   } elsif (ref($vars) =~ /ARRAY/) {
      $varbind_list_ref = [$vars];
      $varbind_list_ref = $vars if ref($$vars[0]) =~ /ARRAY/;
   } else {
      # my ($tag, $iid) = ($vars =~ /^((?:\.\d+)+|\w+)\.?(.*)$/);
      my ($tag, $iid) = ($vars =~ /^(.*?)\.?(\d+)+$/);
      $varbind_list_ref = [[$tag, $iid]];
   }

   if (scalar @$varbind_list_ref == 0) {
      $this->{ErrorNum} = SNMP::constant("SNMPERR_GENERR", 0);
      $this->{ErrorStr} = "cannot bulkwalk() empty variable list";
      return undef;
   }
   if (scalar @$varbind_list_ref < $nonrepeaters) {
      $this->{ErrorNum} = SNMP::constant("SNMPERR_GENERR", 0);
      $this->{ErrorStr} = "bulkwalk() needs at least $nonrepeaters varbinds";
      return undef;
   }

   my $cb = shift;
   @res = SNMP::_bulkwalk($this, $nonrepeaters, $maxrepetitions,
						$varbind_list_ref, $cb);

   # Return, in list context, a copy of the array of arrays of Varbind refs.
   # In scalar context, return either a reference to the array of arrays of
   # Varbind refs, or the request ID for an asynchronous bulkwalk.  This is
   # a compromise between the getbulk()-ish return, and the more useful array
   # of arrays of Varbinds return from the synchronous bulkwalk().
   #
   return @res if (wantarray());
   return defined($cb) ? $res[0] : \@res;
}

%trap_type = (coldStart => 0, warmStart => 1, linkDown => 2, linkUp => 3,
	      authFailure => 4, egpNeighborLoss => 5, specific => 6 );
sub trap {
# (v1) enterprise, agent, generic, specific, uptime, <vars>
# $sess->trap(enterprise=>'.1.3.6.1.4.1.2021', # or 'ucdavis' [default]
#             agent => '127.0.0.1', # or 'localhost',[default 1st intf on host]
#             generic => specific,  # can be omitted if 'specific' supplied
#             specific => 5,        # can be omitted if 'generic' supplied
#             uptime => 1234,       # default to localhost uptime (0 on win32)
#             [[ifIndex, 1, 1],[sysLocation, 0, "here"]]); # optional vars
#                                                          # always last
# (v2) oid, uptime, <vars>
# $sess->trap(uptime => 1234,
#             oid => 'snmpRisingAlarm',
#             [[ifIndex, 1, 1],[sysLocation, 0, "here"]]); # optional vars
#                                                          # always last
#                                                          # always last


   my $this = shift;
   my $vars = pop if ref($_[$#_]); # last arg may be varbind or varlist
   my %param = @_;
   my ($varbind_list_ref, @res);

   if (ref($vars) =~ /SNMP::VarList/) {
     $varbind_list_ref = $vars;
   } elsif (ref($vars) =~ /SNMP::Varbind/) {
     $varbind_list_ref = [$vars];
   } elsif (ref($vars) =~ /ARRAY/) {
     $varbind_list_ref = [$vars];
     $varbind_list_ref = $vars if ref($$vars[0]) =~ /ARRAY/;
   }

   if ($this->{Version} eq '1') {
       my $enterprise = $param{enterprise} || 'ucdavis';
       $enterprise = SNMP::translateObj($enterprise)
	   unless $enterprise =~ /^[\.\d]+$/;
       my $agent = $param{agent} || '';
       my $generic = $param{generic} || 'specific';
       $generic = $trap_type{$generic} || $generic;
       my $uptime = $param{uptime} || SNMP::_sys_uptime();
       my $specific = $param{specific} || 0;
       @res = SNMP::_trapV1($this, $enterprise, $agent, $generic, $specific,
			  $uptime, $varbind_list_ref);
   } elsif  (($this->{Version} eq '2')|| ($this->{Version} eq '2c')) {
       my $trap_oid = $param{oid} || $param{trapoid} || '.0.0';
       my $uptime = $param{uptime} || SNMP::_sys_uptime();
       @res = SNMP::_trapV2($this, $uptime, $trap_oid, $varbind_list_ref);
   }

   return(wantarray() ? @res : $res[0]);
}

sub inform {
# (v3) oid, uptime, <vars>
# $sess->inform(uptime => 1234,
#             oid => 'coldStart',
#             [[ifIndex, 1, 1],[sysLocation, 0, "here"]]); # optional vars
#                                                          # then callback
                                                           # always last


   my $this = shift;
   my $vars;
   my $cb;
   $cb = pop if ref($_[$#_]) eq 'CODE'; # last arg may be code
   $vars = pop if ref($_[$#_]); # varbind or varlist
   my %param = @_;
   my ($varbind_list_ref, @res);

   if (ref($vars) =~ /SNMP::VarList/) {
     $varbind_list_ref = $vars;
   } elsif (ref($vars) =~ /SNMP::Varbind/) {
     $varbind_list_ref = [$vars];
   } elsif (ref($vars) =~ /ARRAY/) {
     $varbind_list_ref = [$vars];
     $varbind_list_ref = $vars if ref($$vars[0]) =~ /ARRAY/;
   }

   my $trap_oid = $param{oid} || $param{trapoid};
   my $uptime = $param{uptime} || SNMP::_sys_uptime();

   if($this->{Version} eq '3') {
     @res = SNMP::_inform($this, $uptime, $trap_oid, $varbind_list_ref, $cb);
   } else {
     warn("error:inform: This version doesn't support the command\n");
   }

   return(wantarray() ? @res : $res[0]);
}

package SNMP::TrapSession;
@ISA = ('SNMP::Session');

sub new {
   my $type = shift;

   # allow override of remote SNMP trap port
   unless (grep(/RemotePort/, @_)) {
       push(@_, 'RemotePort', 162); # push on new default for trap session
   }

   SNMP::Session::new($type, @_);
}

package SNMP::Varbind;

$tag_f = 0;
$iid_f = 1;
$val_f = 2;
$type_f = 3;
$time_f = 4;

sub new {
   my $type = shift;
   my $this = shift;
   $this ||= [];
   bless $this;
}

sub tag {
  $_[0]->[$tag_f];
}

sub iid {
  $_[0]->[$iid_f];
}

sub val {
  $_[0]->[$val_f];
}

sub type {
  $_[0]->[$type_f];
}

sub name {
   if (defined($_[0]->[$iid_f]) && ($_[0]->[$iid_f] =~ m/^[0-9]+$/)) {
      return $_[0]->[$tag_f] . "." . $_[0]->[$iid_f];
   }

   return $_[0]->[$tag_f];
}

sub fmt {
    my $self = shift;
    return $self->name . " = \"" . $self->val . "\" (" . $self->type . ")";
}


#sub DESTROY {
#    print "SNMP::Varbind::DESTROY($_[0])\n";
#}

package SNMP::VarList;

sub new {
   my $type = shift;
   my $this = [];
   my $varb;
   foreach $varb (@_) {
     $varb = new SNMP::Varbind($varb) unless ref($varb) =~ /SNMP::Varbind/;
     push(@{$this}, $varb);
   }

   bless $this;
}

#sub DESTROY {
#    print "SNMP::VarList::DESTROY($_[0])\n";
#}

package SNMP::DEBUGGING;
# controls info/debugging output from SNMP module and libsnmp
# $SNMP::debugging == 1    =>   enables general info and warning output
#                                (eqiv. to setting $SNMP::verbose)
# $SNMP::debugging == 2    =>   enables do_debugging from libsnmp as well
# $SNMP::debugging == 3    =>   enables packet_dump from libsnmp as well
sub TIESCALAR { my $class = shift; my $val; bless \$val, $class; }

sub FETCH { ${$_[0]}; }

sub STORE {
    $SNMP::verbose = $_[1];
    SNMP::_set_debugging($_[1]>1);
    $SNMP::dump_packet = ($_[1]>2);
    ${$_[0]} = $_[1];
}

sub DELETE {
    $SNMP::verbose = 0;
    SNMP::_set_debugging(0);
    $SNMP::dump_packet = 0;
    ${$_[0]} = undef;
}

package SNMP::DEBUG_INTERNALS;		# Controls SNMP.xs debugging.
sub TIESCALAR { my $class = shift; my $val; bless \$val, $class; }

sub FETCH { ${$_[0]}; }

sub STORE {
    SNMP::_debug_internals($_[1]);
    ${$_[0]} = $_[1];
}

sub DELETE {
    SNMP::_debug_internals(0);
    ${$_[0]} = undef;
}

package SNMP::DUMP_PACKET;
# controls packet dump output from libsnmp

sub TIESCALAR { my $class = shift; my $val; bless \$val, $class; }

sub FETCH { ${$_[0]}; }

sub STORE { SNMP::_dump_packet($_[1]); ${$_[0]} = $_[1]; }

sub DELETE { SNMP::_dump_packet(0); ${$_[0]} = 0; }

package SNMP::MIB;

sub TIEHASH {
    bless {};
}

sub FETCH {
    my $this = shift;
    my $key = shift;

    if (!defined $this->{$key}) {
	tie(%{$this->{$key}}, SNMP::MIB::NODE, $key) or return undef;
    }
    $this->{$key};
}

sub STORE {
    warn "STORE(@_) : write access to the MIB not implemented\n";
}

sub DELETE {
    delete $_[0]->{$_[1]}; # just delete cache entry
}

sub FIRSTKEY { return '.1'; } # this should actually start at .0 but
                              # because nodes are not stored in lexico
                              # order in ucd-snmp node tree walk will
                              # miss most of the tree
sub NEXTKEY { # this could be sped up by using an XS __get_next_oid maybe
   my $node = $_[0]->FETCH($_[1])->{nextNode};
   $node->{objectID};
}
sub EXISTS { exists $_[0]->{$_[1]} || $_[0]->FETCH($_[1]); }
sub CLEAR { undef %{$_[0]}; } # clear the cache

package SNMP::MIB::NODE;
my %node_elements =
    (
     objectID => 0, # dotted decimal fully qualified OID
     label => 0,    # leaf textual identifier (e.g., 'sysDescr')
     subID => 0,    # leaf numeric OID component of objectID (e.g., '1')
     moduleID => 0, # textual identifier for module (e.g., 'RFC1213-MIB')
     parent => 0,   # parent node
     children => 0, # array reference of children nodes
     indexes => 0,  # returns array of column labels
     varbinds => 0, # returns array of trap/notification varbinds
     nextNode => 0, # next lexico node (BUG! does not return in lexico order)
     type => 0,     # returns simple type (see getType for values)
     access => 0,   # returns ACCESS (ReadOnly, ReadWrite, WriteOnly,
                    # NoAccess, Notify, Create)
     status => 0,   # returns STATUS (Mandatory, Optional, Obsolete,
                    # Deprecated)
     syntax => 0,   # returns 'textualConvention' if defined else 'type'
     textualConvention => 0, # returns TEXTUAL-CONVENTION
     units => 0,    # returns UNITS
     hint => 0,     # returns HINT
     enums => 0,    # returns hash ref {tag => num, ...}
     ranges => 0,   # returns array ref of hash ref [{low => num, high => num}]
     defaultValue => 0, # returns default value
     description => 0, # returns DESCRIPTION ($SNMP::save_descriptions must
                    # be set prior to MIB initialization/parsing
     augments => 0, # textual identifier of augmented object
    );

# sub TIEHASH - implemented in SNMP.xs

# sub FETCH - implemented in SNMP.xs

sub STORE {
    warn "STORE(@_): write access to MIB node not implemented\n";
}

sub DELETE {
    warn "DELETE(@_): write access to MIB node not implemented\n";
}

sub FIRSTKEY { my $k = keys %node_elements; (each(%node_elements))[0]; }
sub NEXTKEY { (each(%node_elements))[0]; }
sub EXISTS { exists($node_elements{$_[1]}); }
sub CLEAR {
    warn "CLEAR(@_): write access to MIB node not implemented\n";
}

#sub DESTROY {
#    warn "DESTROY(@_): write access to MIB node not implemented\n";
#    # print "SNMP::MIB::NODE::DESTROY : $_[0]->{label} ($_[0])\n";
#}
package SNMP::MIB::SAVE_DESCR;

sub TIESCALAR { my $class = shift; my $val; bless \$val, $class; }

sub FETCH { ${$_[0]}; }

sub STORE { SNMP::_set_save_descriptions($_[1]); ${$_[0]} = $_[1]; }

sub DELETE { SNMP::_set_save_descriptions(0); ${$_[0]} = 0; }

package SNMP::MIB::REPLACE_NEWER;               # Controls MIB parsing

sub TIESCALAR { my $class = shift; my $val; bless \$val, $class; }

sub FETCH { ${$_[0]}; }

sub STORE {
    SNMP::_set_replace_newer($_[1]);
    ${$_[0]} = $_[1];
}

sub DELETE {
    SNMP::_set_replace_newer(0);
    ${$_[0]} = 0;
}

package SNMP::MIB::MIB_OPTIONS;

sub TIESCALAR { my $class = shift; my $val; bless \$val, $class; }

sub FETCH { ${$_[0]}; }

sub STORE { SNMP::_mib_toggle_options($_[1]); ${$_[0]} = $_[1]; }

sub DELETE { SNMP::_mib_toggle_options(0); ${$_[0]} = ''; }

package SNMP;
END{SNMP::_sock_cleanup() if defined &SNMP::_sock_cleanup;}
# Autoload methods go after __END__, and are processed by the autosplit prog.

1;
__END__

=head1 NAME

SNMP - The Perl5 'SNMP' Extension Module for the Net-SNMP SNMP package.

=head1 SYNOPSIS

 use SNMP;
 ...
 $sess = new SNMP::Session(DestHost => localhost, Community => public);
 $val = $sess->get('sysDescr.0');
 ...
 $vars = new SNMP::VarList([sysDescr,0], [sysContact,0], [sysLocation,0]);
 @vals = $sess->get($vars);
 ...
 $vb = new SNMP::Varbind();
 do {
    $val = $sess->getnext($vb);
    print "@{$vb}\n";
 } until ($sess->{ErrorNum});
 ...
 $SNMP::save_descriptions = 1;
 SNMP::initMib(); # assuming mib is not already loaded
 print "$SNMP::MIB{sysDescr}{description}\n";

=head1 DESCRIPTION