source: trunk/cgi-bin/IPDB.pm@ 630

# ipdb/cgi-bin/IPDB.pm
# Contains functions for IPDB - database access, subnet mangling, block allocation, etc
###
# SVN revision info
# $Date: 2014-10-08 21:31:48 +0000 (Wed, 08 Oct 2014) $
# SVN revision $Rev: 630 $
# Last update by $Author: kdeugau $
###
# Copyright (C) 2004-2010 - Kris Deugau

package IPDB;

use strict;
use warnings;
use Exporter;
use DBI;
use Net::SMTP;
use NetAddr::IP qw(:lower Compact );
use Frontier::Client;
use POSIX;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);

$VERSION        = 2; ##VERSION##
@ISA            = qw(Exporter);
@EXPORT_OK    = qw(
        %disp_alloctypes %list_alloctypes %def_custids @citylist @poplist
        %IPDBacl %aclmsg $errstr
        &initIPDBGlobals &connectDB &finish &checkDBSanity
        &addMaster &touchMaster
        &listSummary &listSubs &listFree &listPool
        &getMasterList &getTypeList &getPoolSelect &findAllocateFrom
        &ipParent &subParent &blockParent &getRoutedCity
        &allocateBlock &updateBlock &deleteBlock &getBlockData &getBlockRDNS
        &getNodeList &getNodeName &getNodeInfo
        &mailNotify
        );

@EXPORT         = (); # Export nothing by default.
%EXPORT_TAGS    = ( ALL => [qw(
                %disp_alloctypes %list_alloctypes %def_custids @citylist @poplist
                %IPDBacl %aclmsg $errstr
                &initIPDBGlobals &connectDB &finish &checkDBSanity
                &addMaster &touchMaster
                &listSummary &listSubs &listFree &listPool
                &getMasterList &getTypeList &getPoolSelect &findAllocateFrom
                &ipParent &subParent &blockParent &getRoutedCity
                &allocateBlock &updateBlock &deleteBlock &getBlockData &getBlockRDNS
                &getNodeList &getNodeName &getNodeInfo
                &mailNotify
                )]
        );

##
## Global variables
##
our %disp_alloctypes;
our %list_alloctypes;
our %def_custids;
our @citylist;
our @poplist;
our %IPDBacl;

# mapping table for functional-area => error message
our %aclmsg = (
        addmaster       => 'add a master block',
        addblock        => 'add an allocation',
        updateblock     => 'update a block',
        delblock        => 'delete an allocation',
        );

# error reporting
our $errstr = '';

our $org_name = 'Example Corp';
our $smtphost = 'smtp.example.com';
our $domain = 'example.com';
our $defcustid = '5554242';
# mostly for rwhois
##fixme:  leave these blank by default?
our $rwhoisDataPath = '/usr/local/rwhoisd/etc/rwhoisd'; # to match ./configure defaults from rwhoisd-1.5.9.6
our $org_street = '123 4th Street';
our $org_city = 'Anytown';
our $org_prov_state = 'ON';
our $org_pocode = 'H0H 0H0';
our $org_country = 'CA';
our $org_phone = '000-555-1234';
our $org_techhandle = 'ISP-ARIN-HANDLE';
our $org_email = 'noc@example.com';
our $hostmaster = 'dns@example.com';

our $syslog_facility = 'local2';

our $rpc_url = '';
our $revgroup = 1;      # should probably be configurable somewhere
our $rpccount = 0;

##
## Internal utility functions
##

## IPDB::_rpc
# Make an RPC call for DNS changes
sub _rpc {
  return if !$rpc_url;  # Just In Case
  my $rpcsub = shift;
  my %args = @_;

  # Make an object to represent the XML-RPC server.
  my $server = Frontier::Client->new(url => $rpc_url, debug => 0);
  my $result;

  my %rpcargs = (
        rpcsystem => 'ipdb',
        rpcuser => $args{user},
        );

  eval {
    $result = $server->call("dnsdb.$rpcsub", %rpcargs, %args);
  };
  if ($@) {
    $errstr = $@;
    $errstr =~ s/Fault returned from XML RPC Server, fault code 4: error executing RPC `dnsdb.$rpcsub'\.\s//;
  }
  $rpccount++;

  return $result if $result;
} # end _rpc()


# Let's initialize the globals.
## IPDB::initIPDBGlobals()
# Initialize all globals.  Takes a database handle, returns a success or error code
sub initIPDBGlobals {
  my $dbh = $_[0];
  my $sth;

  # Initialize alloctypes hashes
  $sth = $dbh->prepare("select type,listname,dispname,listorder,def_custid from alloctypes order by listorder");
  $sth->execute;
  while (my @data = $sth->fetchrow_array) {
    $disp_alloctypes{$data[0]} = $data[2];
    $def_custids{$data[0]} = $data[4];
    if ($data[3] < 900) {
      $list_alloctypes{$data[0]} = $data[1];
    }
  }

  # City and POP listings
  $sth = $dbh->prepare("select city,routing from cities order by city");
  $sth->execute;
  return (undef,$sth->errstr) if $sth->err;
  while (my @data = $sth->fetchrow_array) {
    push @citylist, $data[0];
    if ($data[1] eq 'y') {
      push @poplist, $data[0];
    }
  }

  # Load ACL data.  Specific username checks are done at a different level.
  $sth = $dbh->prepare("select username,acl from users");
  $sth->execute;
  return (undef,$sth->errstr) if $sth->err;
  while (my @data = $sth->fetchrow_array) {
    $IPDBacl{$data[0]} = $data[1];
  }

##fixme:  initialize HTML::Template env var for template path
# something like $self->path().'/templates' ?
#  $ENV{HTML_TEMPLATE_ROOT} = 'foo/bar';

  return (1,"OK");
} # end initIPDBGlobals


## IPDB::connectDB()
# Creates connection to IPDB.
# Requires the database name, username, and password.
# Returns a handle to the db.
# Set up for a PostgreSQL db;  could be any transactional DBMS with the
# right changes.
sub connectDB {
  my $dbname = shift;
  my $user = shift;
  my $pass = shift;
  my $dbhost = shift;

  my $dbh;
  my $DSN = "DBI:Pg:".($dbhost ? "host=$dbhost;" : '')."dbname=$dbname";

# Note that we want to autocommit by default, and we will turn it off locally as necessary.
# We may not want to print gobbledygook errors;  YMMV.  Have to ponder that further.
  $dbh = DBI->connect($DSN, $user, $pass, {
        AutoCommit => 1,
        PrintError => 0
        })
    or return (undef, $DBI::errstr) if(!$dbh);

# Return here if we can't select.  Note that this indicates a
# problem executing the select.
  my $sth = $dbh->prepare("select type from alloctypes");
  $sth->execute();
  return (undef,$DBI::errstr) if ($sth->err);

# See if the select returned anything (or null data).  This should
# succeed if the select executed, but...
  $sth->fetchrow();
  return (undef,$DBI::errstr)  if ($sth->err);

# If we get here, we should be OK.
  return ($dbh,"DB connection OK");
} # end connectDB


## IPDB::finish()
# Cleans up after database handles and so on.
# Requires a database handle
sub finish {
  my $dbh = $_[0];
  $dbh->disconnect if $dbh;
} # end finish


## IPDB::checkDBSanity()
# Quick check to see if the db is responding.  A full integrity
# check will have to be a separate tool to walk the IP allocation trees.
sub checkDBSanity {
  my ($dbh) = $_[0];

  if (!$dbh) {
    print "No database handle, or connection has been closed.";
    return -1;
  } else {
    # it connects, try a stmt.
    my $sth = $dbh->prepare("select type from alloctypes");
    my $err = $sth->execute();

    if ($sth->fetchrow()) {
      # all is well.
      return 1;
    } else {
      print "Connected to the database, but could not execute test statement.  ".$sth->errstr();
      return -1;
    }
  }
  # Clean up after ourselves.
#  $dbh->disconnect;
} # end checkDBSanity


## IPDB::addMaster()
# Does all the magic necessary to sucessfully add a master block
# Requires database handle, block to add
# Returns failure code and error message or success code and "message"
sub addMaster {
  my $dbh = shift;
        # warning!  during testing, this somehow generated a "Bad file descriptor" error.  O_o
  my $cidr = new NetAddr::IP shift;
  my %args = @_;

  $args{vrf} = '' if !$args{vrf};
  $args{rdns} = '' if !$args{rdns};
  $args{defloc} = '' if !$args{defloc};
  $args{rwhois} = 'n' if !$args{rwhois};        # fail "safe", sort of.
  $args{rwhois} = 'n' if $args{rwhois} ne 'n' and $args{rwhois} ne 'y';

  my $mid;

  # Allow transactions, and raise an exception on errors so we can catch it later.
  # Use local to make sure these get "reset" properly on exiting this block
  local $dbh->{AutoCommit} = 0;
  local $dbh->{RaiseError} = 1;

  # Wrap all the SQL in a transaction
  eval {
    # First check - does the master exist?  Ignore VRFs until we can see a sane UI
    my ($mcontained) = $dbh->selectrow_array("SELECT cidr FROM allocations WHERE cidr >>= ? AND type = 'mm'",
        undef, ($cidr) );
    die "Master block $mcontained already exists and entirely contains $cidr\n"
        if $mcontained;

    # Second check - does the new master contain an existing one or ones?
    my ($mexist) = $dbh->selectrow_array("SELECT cidr FROM allocations WHERE cidr <<= ? AND type = 'mm'",
        undef, ($cidr) );

    if (!$mexist) {
      # First case - master is brand-spanking-new.
##fixme: rwhois should be globally-flagable somewhere, much like a number of other things
## maybe a db table called "config"?
      $dbh->do("INSERT INTO allocations (cidr,type,swip,vrf,rdns) VALUES (?,?,?,?,?)", undef,
        ($cidr, 'mm', 'y', $args{vrf}, $args{rdns}) );
      ($mid) = $dbh->selectrow_array("SELECT currval('allocations_id_seq')");

# Unrouted blocks aren't associated with a city (yet).  We don't rely on this
# elsewhere though;  legacy data may have traps and pitfalls in it to break this.
# Thus the "routed" flag.
      $dbh->do("INSERT INTO freeblocks (cidr,city,routed,parent_id,vrf,master_id) VALUES (?,?,?,?,?,?)", undef,
        ($cidr, '<NULL>', 'm', $mid, $args{vrf}, $mid) );

      # master should be its own master, so deletes directly at the master level work
      $dbh->do("UPDATE allocations SET master_id = ? WHERE id = ?", undef, ($mid, $mid) );

      # If we get here, everything is happy.  Commit changes.
      $dbh->commit;

    } # done new master does not contain existing master(s)
    else {

      # collect the master(s) we're going to absorb, and snag the longest netmask while we're at it.
      my $smallmask = $cidr->masklen;
      my $sth = $dbh->prepare("SELECT cidr,id FROM allocations WHERE cidr <<= ? AND type='mm' AND parent_id=0");
      $sth->execute($cidr);
      my @cmasters;
      my @oldmids;
      while (my @data = $sth->fetchrow_array) {
        my $master = new NetAddr::IP $data[0];
        push @cmasters, $master;
        push @oldmids, $data[1];
        $smallmask = $master->masklen if $master->masklen > $smallmask;
      }

      # split the new master, and keep only those blocks not part of an existing master
      my @blocklist;
      foreach my $seg ($cidr->split($smallmask)) {
        my $contained = 0;
        foreach my $master (@cmasters) {
          $contained = 1 if $master->contains($seg);
        }
        push @blocklist, $seg if !$contained;
      }

##fixme:  master_id
      # collect the unrouted free blocks within the new master
      $sth = $dbh->prepare("SELECT cidr FROM freeblocks WHERE masklen(cidr) <= ? AND cidr <<= ? AND routed = 'm'");
      $sth->execute($smallmask, $cidr);
      while (my @data = $sth->fetchrow_array) {
        my $freeblock = new NetAddr::IP $data[0];
        push @blocklist, $freeblock;
      }

      # combine the set of free blocks we should have now.
      @blocklist = Compact(@blocklist);

      # master
      $dbh->do("INSERT INTO allocations (cidr,type,swip,vrf,rdns) VALUES (?,?,?,?,?)", undef,
        ($cidr, 'mm', 'y', $args{vrf}, $args{rdns}) );
      ($mid) = $dbh->selectrow_array("SELECT currval('allocations_id_seq')");

      # master should be its own master, so deletes directly at the master level work
      $dbh->do("UPDATE allocations SET master_id = ? WHERE id = ?", undef, ($mid, $mid) );

      # and now insert the new data.  Make sure to delete old masters too.

      # freeblocks
      $sth = $dbh->prepare("DELETE FROM freeblocks WHERE cidr <<= ? AND parent_id IN (".join(',', @oldmids).")");
      my $sth2 = $dbh->prepare("INSERT INTO freeblocks (cidr,city,routed,parent_id,vrf,master_id)".
        " VALUES (?,'<NULL>','m',?,?,?)");
      foreach my $newblock (@blocklist) {
        $sth->execute($newblock);
        $sth2->execute($newblock, $mid, $args{vrf}, $mid);
      }

      # Update immediate allocations, and remove the old parents
      $sth = $dbh->prepare("UPDATE allocations SET parent_id = ? WHERE parent_id = ?");
      $sth2 = $dbh->prepare("DELETE FROM allocations WHERE id = ?");
      foreach my $old (@oldmids) {
        $sth->execute($mid, $old);
        $sth2->execute($old);
      }

      # *whew*  If we got here, we likely suceeded.
      $dbh->commit;

    } # new master contained existing master(s)
  }; # end eval

  if ($@) {
    my $msg = $@;
    eval { $dbh->rollback; };
    return ('FAIL',$msg);
  } else {

    # Only attempt rDNS if the IPDB side succeeded
    if ($rpc_url) {

# Note *not* splitting reverse zones negates any benefit from caching the exported data.
# IPv6 address space is far too large to split usefully, and in any case (also due to
# the large address space) doesn't support the iterated template records v4 zones do
# that causes the bulk of the slowdown that needs the cache anyway.

      my @zonelist;
# allow splitting reverse zones to be disabled, maybe, someday
#if ($splitrevzones && !$cidr->{isv6}) {
      if (1 && !$cidr->{isv6}) {
        my $splitpoint = ($cidr->masklen <= 16 ? 16 : 24);      # hack pthui
        @zonelist = $cidr->split($splitpoint);
      } else {
        @zonelist = ($cidr);
      }
      my @fails;
      ##fixme:  remove hardcoding where possible
      foreach my $subzone (@zonelist) {
        my %rpcargs = (
          rpcuser => $args{user},
          revzone => "$subzone",
          revpatt => $args{rdns},
          defloc => $args{defloc},
          group => $revgroup,   # not sure how these two could sanely be exposed, tbh...
          state => 1,   # could make them globally configurable maybe
        );
        if ($rpc_url && !_rpc('addRDNS', %rpcargs)) {
          push @fails, ("$subzone" => $errstr);
        }
      }
      if (@fails) {
        $errstr = "Warning(s) adding $cidr to reverse DNS:\n".join("\n", @fails);
        return ('WARN',$mid);
      }
    }
    return ('OK',$mid);
  }
} # end addMaster


## IPDB::touchMaster()
# Update last-changed timestamp on a master block.
sub touchMaster {
  my $dbh = shift; 
  my $master = shift;

  local $dbh->{AutoCommit} = 0;
  local $dbh->{RaiseError} = 1;

  eval {
    $dbh->do("UPDATE masterblocks SET mtime=now() WHERE cidr = ?", undef, ($master));
    $dbh->commit;
  };

  if ($@) {
    my $msg = $@;
    eval { $dbh->rollback; };
    return ('FAIL',$msg);
  }
  return ('OK','OK');
} # end touchMaster()


## IPDB::listSummary()
# Get summary list of all master blocks
# Returns an arrayref to a list of hashrefs containing the master block, routed count,
# allocated count, free count, and largest free block masklength
sub listSummary {
  my $dbh = shift;

  my $mlist = $dbh->selectall_arrayref("SELECT cidr AS master,id,vrf FROM allocations ".
        "WHERE type='mm' ORDER BY cidr",
        { Slice => {} });

  foreach (@{$mlist}) {
    my ($rcnt) = $dbh->selectrow_array("SELECT count(*) FROM allocations WHERE cidr <<= ? AND type='rm' AND master_id = ?",
        undef, ($$_{master}, $$_{id}));
    $$_{routed} = $rcnt;
    my ($acnt) = $dbh->selectrow_array("SELECT count(*) FROM allocations WHERE cidr <<= ? ".
        "AND NOT type='rm' AND NOT type='mm' AND master_id = ?",
        undef, ($$_{master}, $$_{id}));
    $$_{allocated} = $acnt;
    my ($fcnt) = $dbh->selectrow_array("SELECT count(*) FROM freeblocks WHERE cidr <<= ? AND master_id = ?",
        undef, ($$_{master}, $$_{id}));
    $$_{free} = $fcnt;
    my ($bigfree) = $dbh->selectrow_array("SELECT masklen(cidr) AS maskbits FROM freeblocks WHERE cidr <<= ?".
        " AND master_id = ? ORDER BY masklen(cidr) LIMIT 1", undef, ($$_{master}, $$_{id}));
##fixme:  should find a way to do this without having to HTMLize the <>
    $bigfree = "/$bigfree" if $bigfree;
    $bigfree = '<NONE>' if !$bigfree;
    $$_{bigfree} = $bigfree;
  }
  return $mlist;
} # end listSummary()


## IPDB::listSubs()
# Get list of subnets within a specified CIDR block, on a specified VRF.
# Returns an arrayref to a list of hashrefs containing the CIDR block, customer location or
# city it's routed to, block type, SWIP status, and description
sub listSubs {
  my $dbh = shift;
  my %args = @_;

  # Just In Case
  $args{vrf} = '' if !$args{vrf};

  # Snag the allocations for this block
  my $sth = $dbh->prepare("SELECT cidr,city,type,custid,swip,description,id,master_id".
        " FROM allocations WHERE parent_id = ? ORDER BY cidr");
  $sth->execute($args{parent});

  # hack hack hack
  # set up to flag swip=y records if they don't actually have supporting data in the customers table
  my $custsth = $dbh->prepare("SELECT count(*) FROM customers WHERE custid = ?");

  my @blocklist;
  while (my ($cidr,$city,$type,$custid,$swip,$desc,$id) = $sth->fetchrow_array()) {
    $custsth->execute($custid);
    my ($ncust) = $custsth->fetchrow_array();
    my %row = (
        block => $cidr,
        city => $city,
        type => $disp_alloctypes{$type},
        custid => $custid,
        swip => ($swip eq 'y' ? 'Yes' : 'No'),
        partswip => ($swip eq 'y' && $ncust == 0 ? 1 : 0),
        desc => $desc,
        hassubs => ($type eq 'rm' || $type =~ /.c/ ? 1 : 0),
        id => $id,
        );
#    $row{subblock} = ($type =~ /^.r$/);         # hmf.  wonder why these won't work in the hash declaration...
    $row{listpool} = ($type =~ /^.[pd]$/);
    push (@blocklist, \%row);
  }
  return \@blocklist;
} # end listSubs()


## IPDB::listMaster()
# Get list of routed blocks in the requested master
# Returns an arrayref to a list of hashrefs containing the routed block, POP/city the block is routed to,
# allocated count, free count, and largest free block masklength
sub listMaster {
  my $dbh = shift;
  my $master = shift;

  my $rlist = $dbh->selectall_arrayref("SELECT cidr AS block,city FROM routed WHERE cidr <<= ? ORDER BY cidr",
        { Slice => {} }, ($master) );

  foreach (@{$rlist}) {
    my ($acnt) = $dbh->selectrow_array("SELECT count(*) FROM allocations WHERE cidr <<= ?", undef, ($$_{block}));
    $$_{nsubs} = $acnt;
    my ($fcnt) = $dbh->selectrow_array("SELECT count(*) FROM freeblocks WHERE cidr <<= ?".
        " AND (routed='y' OR routed='n')", undef, ($$_{block}));
    $$_{nfree} = $fcnt;
    my ($bigfree) = $dbh->selectrow_array("SELECT maskbits FROM freeblocks WHERE cidr <<= ?".
        " AND (routed='y' OR routed='n') ORDER BY maskbits LIMIT 1", undef, ($$_{block}));
##fixme:  should find a way to do this without having to HTMLize the <>
    $bigfree = "/$bigfree" if $bigfree;
    $bigfree = '<NONE>' if !$bigfree;
    $$_{lfree} = $bigfree;
  }
  return $rlist;
} # end listMaster()


## IPDB::listRBlock()
# Gets a list of free blocks in the requested parent/master in both CIDR and range notation
# Takes a parent/master and an optional flag to look at routed or unrouted blocks, depending
# on whether the master is a direct master or a routed block
# Returns an arrayref to a list of hashrefs containing the CIDR and range-notation blocks
sub listRBlock {
  my $dbh = shift;
  my $routed = shift;

  # Snag the allocations for this block
  my $sth = $dbh->prepare("SELECT cidr,city,type,custid,swip,description".
        " FROM allocations WHERE cidr <<= ? ORDER BY cidr");
  $sth->execute($routed);

  # hack hack hack
  # set up to flag swip=y records if they don't actually have supporting data in the customers table
  my $custsth = $dbh->prepare("SELECT count(*) FROM customers WHERE custid = ?");

  my @blocklist;
  while (my ($cidr,$city,$type,$custid,$swip,$desc) = $sth->fetchrow_array()) {
    $custsth->execute($custid);
    my ($ncust) = $custsth->fetchrow_array();
    my %row = (
        block => $cidr,
        city => $city,
        type => $disp_alloctypes{$type},
        custid => $custid,
        swip => ($swip eq 'y' ? 'Yes' : 'No'),
        partswip => ($swip eq 'y' && $ncust == 0 ? 1 : 0),
        desc => $desc
        );
    $row{subblock} = ($type =~ /^.r$/);         # hmf.  wonder why these won't work in the hash declaration...
    $row{listpool} = ($type =~ /^.[pd]$/);
    push (@blocklist, \%row);
  }
  return \@blocklist;
} # end listRBlock()


## IPDB::listFree()
# Gets a list of free blocks in the requested parent/master and VRF instance in both CIDR and range notation
# Takes a parent/master ID and an optional VRF specifier that defaults to empty.
# Returns an arrayref to a list of hashrefs containing the CIDR and range-notation blocks
# Returns some extra flags in the hashrefs for routed blocks, since those can have several subtypes
sub listFree {
  my $dbh = shift;

  my %args = @_;
  # Just In Case
  $args{vrf} = '' if !$args{vrf};

  my $sth = $dbh->prepare("SELECT cidr,id FROM freeblocks WHERE parent_id = ? ORDER BY cidr");
#  $sth->execute($args{parent}, $args{vrf});
  $sth->execute($args{parent});
  my @flist;
  while (my ($cidr,$id) = $sth->fetchrow_array()) {
    $cidr = new NetAddr::IP $cidr;
    my %row = (
        fblock => "$cidr",
        frange => $cidr->range,
        fbid => $id,
        fbparent => $args{parent},
        );
    push @flist, \%row;
  }
  return \@flist;
} # end listFree()


## IPDB::listPool()
#
sub listPool {
  my $dbh = shift;
  my $pool = shift;

  my $sth = $dbh->prepare("SELECT ip,custid,available,description,type,id".
        " FROM poolips WHERE parent_id = ? ORDER BY ip");
  $sth->execute($pool);
  my @poolips;
  while (my ($ip,$custid,$available,$desc,$type,$id) = $sth->fetchrow_array) {
    my %row = (
        ip => $ip,
        custid => $custid,
        available => $available,
        desc => $desc,
        delme => $available eq 'n',
        parent => $pool,
        id => $id,
        );
    push @poolips, \%row;
  }
  return \@poolips;
} # end listPool()


## IPDB::getMasterList()
# Get a list of master blocks, optionally including last-modified timestamps
# Takes an optional flag to indicate whether to include timestamps;
#  'm' includes ctime, all others (suggest 'c') do not.
# Returns an arrayref to a list of hashrefs
sub getMasterList {
  my $dbh = shift;
  my $stampme = shift || 'm';   # optional but should be set by caller for clarity

  my $mlist = $dbh->selectall_arrayref("SELECT cidr AS master".($stampme eq 'm' ? ',mtime' : '').
        " FROM masterblocks ORDER BY cidr", { Slice => {} });
  return $mlist;
} # end getMasterList()


## IPDB::getTypeList()
# Get an alloctype/description pair list suitable for dropdowns
# Takes a flag to determine which general groups of types are returned
# Returns an reference to an array of hashrefs
sub getTypeList {
  my $dbh = shift;
  my $tgroup = shift || 'a';    # technically optional, like this, but should
                                # really be specified in the call for clarity
  my $tlist;
  if ($tgroup eq 'n') {
    # grouping 'p' - all netblock types.  These include routed blocks, containers (_c)
    # and contained (_r) types, dynamic-allocation ranges (_e), static IP pools (_d and _p),
    # and the "miscellaneous" cn, in, and en types.
    $tlist = $dbh->selectall_arrayref("SELECT type,listname FROM alloctypes WHERE listorder <= 500 ".
        "AND type NOT LIKE '_i' ORDER BY listorder", { Slice => {} });
  } elsif ($tgroup eq 'p') {
    # grouping 'p' - primary allocation types.  As with 'n' above but without the _r contained types.
    $tlist = $dbh->selectall_arrayref("SELECT type,listname FROM alloctypes WHERE listorder <= 500 ".
        "AND type NOT LIKE '_i' AND type NOT LIKE '_r' ORDER BY listorder", { Slice => {} });
  } elsif ($tgroup eq 'c') {
    # grouping 'c' - contained types.  These include all static IPs and all _r types.
    $tlist = $dbh->selectall_arrayref("SELECT type,listname FROM alloctypes WHERE listorder <= 500 ".
        " AND (type LIKE '_i' OR type LIKE '_r') ORDER BY listorder", { Slice => {} });
  } else {
    # grouping 'a' - all standard allocation types.  This includes everything
    # but mm (present only as a formality).  Make this the default.
    $tlist = $dbh->selectall_arrayref("SELECT type,listname FROM alloctypes WHERE listorder <= 500 ".
        " ORDER BY listorder", { Slice => {} });
  }
  return $tlist;
}


## IPDB::getPoolSelect()
# Get a list of pools matching the passed city and type that have 1 or more free IPs
# Returns an arrayref to a list of hashrefs
sub getPoolSelect {
  my $dbh = shift;
  my $iptype = shift;
  my $pcity = shift;

  my ($ptype) = ($iptype =~ /^(.)i$/);
  return if !$ptype;
  $ptype .= '_';

  my $plist = $dbh->selectall_arrayref(
        "SELECT count(*) AS poolfree,p.pool AS poolblock, a.city AS poolcit, a.rdepth AS poolrdepth ".
        "FROM poolips p ".
        "JOIN allocations a ON p.pool=a.cidr ".
        "WHERE p.available='y' AND a.city = ? AND p.type LIKE ? ".
        "GROUP BY p.pool,a.city,a.rdepth",
        { Slice => {} }, ($pcity, $ptype) );
  return $plist;
} # end getPoolSelect()


## IPDB::findAllocateFrom()
# Find free block to add a new allocation from.  (CIDR block version of pool select above, more or less)
# Takes
#  - mask length
#  - allocation type
#  - POP city "parent"
#  - optional master-block restriction
#  - optional flag to allow automatic pick-from-private-network-ranges
# Returns a string with the first CIDR block matching the criteria, if any
sub findAllocateFrom {
  my $dbh = shift;
  my $maskbits = shift;
  my $type = shift;
  my $city = shift;
  my $pop = shift;
  my %optargs = @_;

  my $failmsg = "No suitable free block found\n";

## Set up the SQL to find out what freeblock we can (probably) use for an allocation.
## Very large systems will require development of a reserve system (possibly an extension
## of the reserve-for-expansion concept in https://secure.deepnet.cx/trac/ipdb/ticket/24?)
## Also populate a value list for the DBI call.

  my @vallist = ($maskbits);
  my $sql = "SELECT cidr,rdepth FROM freeblocks WHERE masklen(cidr) <= ?";

# cases, strict rules
# .c  ->  container type
#   requires a routing container, fbtype r
# .d  ->  DHCP/"normal-routing" static pool
#   requires a routing container, fbtype r
# .e  ->  Dynamic-assignment connectivity
#   requires a routing container, fbtype r
# .i  ->  error, can't allocate static IPs this way?
# mm  ->  error, master block
# rm  ->  routed block
#   requires master block, fbtype m
# .n  ->  Miscellaneous usage
#   requires a routing container, fbtype r
# .p  ->  PPP(oE) static pool
#   requires a routing container, fbtype r
# .r  ->  contained type
#   requires a matching container, fbtype $1
##fixme:  strict-or-not flag

  if ($type =~ /^(.)r$/) {
    push @vallist, $1;
    $sql .= " AND routed = ?";
  } elsif ($type eq 'rm') {
    $sql .= " AND routed = 'm'";
  } else {
    $sql .= " AND routed = 'r'";
  }

  # for PPP(oE) and container types, the POP city is the one attached to the pool.
  # individual allocations get listed with the customer city site.
  ##fixme:  chain cities to align roughly with a full layer-2 node graph
  $city = $pop if $type !~ /^.[pc]$/;
  if ($type ne 'rm' && $city) {
    $sql .= " AND city = ?";
    push @vallist, $city;
  }
  # Allow specifying an arbitrary full block, instead of a master
  if ($optargs{gimme}) {
    $sql .= " AND cidr >>= ?";
    push @vallist, $optargs{gimme};
  }
  # if a specific master was requested, allow the requestor to self->shoot(foot)
  if ($optargs{master} && $optargs{master} ne '-') {
    $sql .= " AND cidr <<= ?" if $optargs{master} ne '-';
    push @vallist, $optargs{master};
  } else {
    # if a specific master was NOT requested, filter out the RFC 1918 private networks
    if (!$optargs{allowpriv}) {
      $sql .= " AND NOT (cidr <<= '192.168.0.0/16' OR cidr <<= '10.0.0.0/8' OR cidr <<= '172.16.0.0/12')";
    }
  }
  # Sorting and limiting, since we don't (currently) care to provide a selection of
  # blocks to carve up.  This preserves something resembling optimal usage of the IP
  # space by forcing contiguous allocations and free blocks as much as possible.
  $sql .= " ORDER BY maskbits DESC,cidr LIMIT 1";

  my ($fbfound,$fbdepth) = $dbh->selectrow_array($sql, undef, @vallist);
  return $fbfound,$fbdepth;
} # end findAllocateFrom()


## IPDB::ipParent()
# Get an IP's parent pool's details
# Takes a database handle and IP
# Returns a hashref to the parent pool block, if any
sub ipParent {
  my $dbh = shift;
  my $block = shift;

  my $pinfo = $dbh->selectrow_hashref("SELECT cidr,custid,type,city,description FROM allocations".
        " WHERE cidr >>= ? AND (type LIKE '_p' OR type LIKE '_d')", undef, ($block) );
  return $pinfo;
} # end ipParent()


## IPDB::subParent()
# Get a block's parent's details
# Takes a database handle and CIDR block
# Returns a hashref to the parent container block, if any
sub subParent {
  my $dbh = shift;
  my $block = shift;

  my $pinfo = $dbh->selectrow_hashref("SELECT cidr,custid,type,city,description FROM allocations".
        " WHERE cidr >>= ?", undef, ($block) );
  return $pinfo;
} # end subParent()


## IPDB::blockParent()
# Get a block's parent's details
# Takes a database handle and CIDR block
# Returns a hashref to the parent container block, if any
sub blockParent {
  my $dbh = shift;
  my $block = shift;

  my $pinfo = $dbh->selectrow_hashref("SELECT cidr,city FROM routed".
        " WHERE cidr >>= ?", undef, ($block) );
  return $pinfo;
} # end blockParent()


## IPDB::getRoutedCity()
# Get the city for a routed block.
sub getRoutedCity {
  my $dbh = shift;
  my $block = shift;

  my ($rcity) = $dbh->selectrow_array("SELECT city FROM routed WHERE cidr = ?", undef, ($block) );
  return $rcity;
} # end getRoutedCity()


## IPDB::allocateBlock()
# Does all of the magic of actually allocating a netblock
# Requires a database handle, and a hash containing the block to allocate, routing depth, custid,
#   type, city, block to allocate from, and optionally a description, notes, circuit ID,
#   and private data
# Returns a success code and optional error message.
sub allocateBlock {
  my $dbh = shift;

  my %args = @_;

  $args{cidr} = new NetAddr::IP $args{cidr};
  $args{alloc_from} = new NetAddr::IP $args{alloc_from};

  $args{desc} = '' if !$args{desc};
  $args{notes} = '' if !$args{notes};
  $args{circid} = '' if !$args{circid};
  $args{privdata} = '' if !$args{privdata};
  $args{vrf} = '' if !$args{vrf};
  $args{rdns} = '' if !$args{rdns};

  my $sth;

  # Snag the "type" of the freeblock (alloc_from) "just in case"
  $sth = $dbh->prepare("select routed from freeblocks where cidr='$args{alloc_from}'");
  $sth->execute;
  my ($alloc_from_type) = $sth->fetchrow_array;

  # To contain the error message, if any.
  my $msg = "Unknown error allocating $args{cidr} as '$disp_alloctypes{$args{type}}'";

  # Enable transactions and error handling
  local $dbh->{AutoCommit} = 0; # These need to be local so we don't
  local $dbh->{RaiseError} = 1; # step on our toes by accident.

  if ($args{type} =~ /^.i$/) {
    $msg = "Unable to assign static IP $args{cidr} to $args{custid}";
    eval {
      if ($args{cidr}) {        # IP specified
        my ($isavail) = $dbh->selectrow_array("SELECT available FROM poolips WHERE ip=?", undef, ($args{cidr}) );
        die "IP is not in an IP pool.\n"
          if !$isavail;
        die "IP already allocated.  Deallocate and reallocate, or update the entry\n"
          if $isavail eq 'n';
      } else {  # IP not specified, take first available
        ($args{cidr}) = $dbh->selectrow_array("SELECT ip FROM poolips WHERE pool=? AND available='y' ORDER BY ip",
                undef, ($args{alloc_from}) );
      }
      $dbh->do("UPDATE poolips SET custid=?,city=?,available='n',description=?,notes=?,circuitid=?,privdata=?,vrf=?,rdns=? ".
        "WHERE ip=?", undef, ($args{custid}, $args{city}, $args{desc}, $args{notes}, $args{circid},
                $args{privdata}, $args{vrf}, $args{rdns}, $args{cidr}) );

# node hack
      if ($args{nodeid} && $args{nodeid} ne '') {
        $dbh->do("INSERT INTO noderef (block,node_id) VALUES (?,?)", undef, ($args{cidr}, $args{nodeid}) );
      }
# end node hack

      $dbh->commit;
    };
    if ($@) {
      $msg .= ": $@";
      eval { $dbh->rollback; };
      return ('FAIL', $msg);
    } else {
      _rpc('addOrUpdateRevRec', cidr => "$args{cidr}", name => $args{rdns}, rpcuser => $args{user});
      return ('OK', $args{cidr});
    }

  } else { # end IP-from-pool allocation

    if ($args{cidr} == $args{alloc_from}) {
      # Easiest case- insert in one table, delete in the other, and go home.  More or less.
      # insert into allocations values (cidr,custid,type,city,desc) and
      # delete from freeblocks where cidr='cidr'
      # For data safety on non-transaction DBs, we delete first.

      eval {
        $msg = "Unable to allocate $args{cidr} as '$disp_alloctypes{$args{type}}'";

        # Get old freeblocks parent/depth/routed for new entries... before we delete it.
        my ($fparent) = $dbh->selectrow_array("SELECT parent FROM freeblocks WHERE cidr=? AND rdepth=?",
                undef, ($args{alloc_from}, $args{rdepth}) );

        # Munge freeblocks
        if ($args{type} =~ /^(.)[mc]$/) {
          # special case - block is a routed or container/"reserve" block
          my $rtype = $1;
          $dbh->do("UPDATE freeblocks SET routed=?,rdepth=rdepth+1,city=?,parent=? WHERE cidr=? AND rdepth=?",
                undef, ($rtype, $args{city}, $args{cidr}, $args{cidr}, $args{rdepth}) );
        } else {
          # "normal" case
          $dbh->do("DELETE FROM freeblocks WHERE cidr=? AND rdepth=?", undef, ($args{cidr}, $args{rdepth}));
        }

        # Insert the allocations entry
        $dbh->do("INSERT INTO allocations ".
                "(cidr,parent,vrf,rdepth,custid,type,city,description,notes,circuitid,privdata,rdns)".
                " VALUES (?,?,?,?,?,?,?,?,?,?,?,?)", undef,
                ($args{cidr}, $fparent, $args{vrf}, $args{rdepth}, $args{custid}, $args{type}, $args{city},
                $args{desc}, $args{notes}, $args{circid}, $args{privdata}, $args{rdns}) );

        # And initialize the pool, if necessary
        # PPPoE pools (currently dialup, DSL, and WiFi) get all IPs made available
        # "DHCP" or "real-subnet" pools have the net, gw, and bcast IPs removed.
        if ($args{type} =~ /^.p$/) {
          $msg = "Could not initialize IPs in new $disp_alloctypes{$args{type}} $args{cidr}";
          my ($code,$rmsg) = initPool($dbh, $args{cidr}, $args{type}, $args{city}, "all", $args{rdepth}+1);
          die $rmsg if $code eq 'FAIL';
        } elsif ($args{type} =~ /^.d$/) {
          $msg = "Could not initialize IPs in new $disp_alloctypes{$args{type}} $args{cidr}";
          my ($code,$rmsg) = initPool($dbh, $args{cidr}, $args{type}, $args{city}, "normal", $args{rdepth}+1);
          die $rmsg if $code eq 'FAIL';
        }

# node hack
      if ($args{nodeid} && $args{nodeid} ne '') {
        $dbh->do("INSERT INTO noderef (block,node_id) VALUES (?,?)", undef, ($args{cidr}, $args{nodeid}) );
      }
# end node hack

        $dbh->commit;
      }; # end of eval
      if ($@) {
        $msg .= ": ".$@;
        eval { $dbh->rollback; };
        return ('FAIL',$msg);
      }

    } else { # cidr != alloc_from

      # Hard case.  Allocation is smaller than free block.
      my $wantmaskbits = $args{cidr}->masklen;
      my $maskbits = $args{alloc_from}->masklen;

      my @newfreeblocks;        # Holds free blocks generated from splitting the source freeblock.

      # This determines which blocks will be left "free" after allocation.  We take the
      # block we're allocating from, and split it in half.  We see which half the wanted
      # block is in, and repeat until the wanted block is equal to one of the halves.
      my $i=0;
      my $tmp_from = $args{alloc_from}; # So we don't munge $args{alloc_from}
      while ($maskbits++ < $wantmaskbits) {
        my @subblocks = $tmp_from->split($maskbits);
        $newfreeblocks[$i++] = (($args{cidr}->within($subblocks[0])) ? $subblocks[1] : $subblocks[0]);
        $tmp_from = ( ($args{cidr}->within($subblocks[0])) ? $subblocks[0] : $subblocks[1] );
      } # while

      # Begin SQL transaction block
      eval {
        $msg = "Unable to allocate $args{cidr} as '$disp_alloctypes{$args{type}}'";

        # Get old freeblocks parent/depth/routed for new entries
        my ($fparent,$fcity,$wasrouted) = $dbh->selectrow_array("SELECT parent,city,routed FROM freeblocks".
                " WHERE cidr=? AND rdepth=?", undef, ($args{alloc_from}, $args{rdepth}) );

        # Delete old freeblocks entry
        $dbh->do("DELETE FROM freeblocks WHERE cidr=? AND rdepth=?", undef, ($args{alloc_from}, $args{rdepth}) );

        # Insert new list of smaller free blocks left over
        $sth = $dbh->prepare("INSERT INTO freeblocks (cidr,city,routed,vrf,parent,rdepth) VALUES (?,?,?,?,?,?)");
        foreach my $block (@newfreeblocks) {
          $sth->execute($block, $fcity, $wasrouted, $args{vrf}, $fparent, $args{rdepth});
        }

        # For routed/container types, add a freeblock within the allocated block so we can subdivide it further
        if ($args{type} =~ /(.)[mc]/) { # rm and .c types - containers
          my $rtype = $1;
          $sth->execute($args{cidr}, $args{city}, $rtype, $args{vrf}, $args{cidr}, $args{rdepth}+1);
        }

        # Insert the allocations entry
        $dbh->do("INSERT INTO allocations ".
                "(cidr,parent,vrf,rdepth,custid,type,city,description,notes,circuitid,privdata,rdns)".
                " VALUES (?,?,?,?,?,?,?,?,?,?,?,?)", undef,
                ($args{cidr}, $fparent, $args{vrf}, $args{rdepth}, $args{custid}, $args{type}, $args{city},
                $args{desc}, $args{notes}, $args{circid}, $args{privdata}, $args{rdns}) );

        # And initialize the pool, if necessary
        # PPPoE pools (currently dialup, DSL, and WiFi) get all IPs made available
        # "DHCP" or "real-subnet" pools have the net, gw, and bcast IPs removed.
        if ($args{type} =~ /^.p$/) {
          $msg = "Could not initialize IPs in new $disp_alloctypes{$args{type}} $args{cidr}";
          my ($code,$rmsg) = initPool($dbh, $args{cidr}, $args{type}, $args{city}, "all", $args{rdepth}+1);
          die $rmsg if $code eq 'FAIL';
        } elsif ($args{type} =~ /^.d$/) {
          $msg = "Could not initialize IPs in new $disp_alloctypes{$args{type}} $args{cidr}";
          my ($code,$rmsg) = initPool($dbh, $args{cidr}, $args{type}, $args{city}, "normal", $args{rdepth}+1);
          die $rmsg if $code eq 'FAIL';
        }

# node hack
      if ($args{nodeid} && $args{nodeid} ne '') {
        $dbh->do("INSERT INTO noderef (block,node_id) VALUES (?,?)", undef, ($args{cidr}, $args{nodeid}) );
      }
# end node hack

        $dbh->commit;
      }; # end eval
      if ($@) {
        $msg .= ": ".$@;
        eval { $dbh->rollback; };
        return ('FAIL',$msg);
      }

    } # end fullcidr != alloc_from

    # now we do the DNS dance for netblocks, if we have an RPC server to do it with and a pattern to use.
    _rpc('addOrUpdateRevRec', cidr => "$args{cidr}", name => $args{rdns}, rpcuser => $args{user})
      if $args{rdns};

    return ('OK', 'OK');

  } # end static-IP vs netblock allocation

} # end allocateBlock()


## IPDB::initPool()
# Initializes a pool
# Requires a database handle, the pool CIDR, type, city, and a parameter
# indicating whether the pool should allow allocation of literally every
# IP, or if it should reserve network/gateway/broadcast IPs
# Note that this is NOT done in a transaction, that's why it's a private
# function and should ONLY EVER get called from allocateBlock()
sub initPool {
  my ($dbh,undef,$type,$city,$class,$rdepth) = @_;
  my $pool = new NetAddr::IP $_[1];

  # IPv6 does not lend itself to IP pools as supported
  return ('FAIL',"Refusing to create IPv6 static IP pool") if $pool->{isv6};
  # IPv4 pools don't make much sense beyond even /24.  Allow up to 4096-host footshooting anyway.
  # NetAddr::IP won't allow more than a /16 (65k hosts).
  return ('FAIL',"Refusing to create oversized static IP pool") if $pool->masklen <= 20;

##fixme Need to just replace 2nd char of type with i rather than capturing 1st char of type
  $type =~ s/[pd]$/i/;
  my $sth;
  my $msg;

  # Trap errors so we can pass them back to the caller.  Even if the
  # caller is only ever supposed to be local, and therefore already
  # trapping errors.  >:(
  local $dbh->{AutoCommit} = 0; # These need to be local so we don't
  local $dbh->{RaiseError} = 1; # step on our toes by accident.

  eval {
    # have to insert all pool IPs into poolips table as "unallocated".
    $sth = $dbh->prepare("INSERT INTO poolips (pool,ip,custid,city,type,rdepth)".
        " VALUES ('$pool', ?, '$defcustid', ?, '$type', $rdepth)");
    my @poolip_list = $pool->hostenum;
    if ($class eq 'all') { # (DSL-ish block - *all* IPs available
      if ($pool->addr !~ /\.0$/) {      # .0 causes weirdness.
        $sth->execute($pool->addr, $city);
      }
      for (my $i=0; $i<=$#poolip_list; $i++) {
        $sth->execute($poolip_list[$i]->addr, $city);
      }
      $pool--;
      if ($pool->addr !~ /\.255$/) {    # .255 can cause weirdness.
        $sth->execute($pool->addr, $city);
      }
    } else { # (real netblock)
      for (my $i=1; $i<=$#poolip_list; $i++) {
        $sth->execute($poolip_list[$i]->addr, $city);
      }
    }
    $dbh->commit;
  };
  if ($@) {
    $msg = $@;
    eval { $dbh->rollback; };
    return ('FAIL',$msg);
  } else {
    return ('OK',"OK");
  }
} # end initPool()


## IPDB::updateBlock()
# Update an allocation
# Takes all allocation fields in a hash
sub updateBlock {
  my $dbh = shift;
  my %args = @_;

  return ('FAIL', 'Missing block to update') if !$args{block};

  # do it all in a transaction
  local $dbh->{AutoCommit} = 0;
  local $dbh->{RaiseError} = 1;

  my @fieldlist;
  my @vallist;
  foreach ('custid', 'city', 'description', 'notes', 'circuitid', 'privdata', 'rdns') {
    if ($args{$_}) {
      push @fieldlist, $_;
      push @vallist, $args{$_};
    }
  }

  my $updtable = 'allocations';
  my $keyfield = 'cidr';
  if ($args{type} =~ /^(.)i$/) {
    $updtable = 'poolips';
    $keyfield = 'ip';
  } else {
## fixme:  there's got to be a better way...
    if ($args{swip}) {
      if ($args{swip} eq 'on' || $args{swip} eq '1' || $args{swip} eq 'y') {
        $args{swip} = 'y';
      } else {
        $args{swip} = 'n';
      }
    }
    foreach ('type', 'swip') {
      if ($args{$_}) {
        push @fieldlist, $_;
        push @vallist, $args{$_};
      }
    }
  }

  return ('FAIL', 'No fields to update') if !@fieldlist;

#  push @vallist, $args{block}, $args{rdepth}, $args{vrf};
  push @vallist, $args{block}, $args{rdepth};
  my $sql = "UPDATE $updtable SET ";
  $sql .= join " = ?, ", @fieldlist;
#  $sql .= " = ? WHERE $keyfield = ? AND rdepth = ? AND vrf = ?";
  $sql .= " = ? WHERE $keyfield = ? AND rdepth = ? ";

  eval {
    # do the update
    $dbh->do($sql, undef, @vallist);

    if ($args{node}) {
      # done with delete/insert so we don't have to worry about funkyness updating a node ref that isn't there
      $dbh->do("DELETE FROM noderef WHERE block = ?", undef, ($args{block}) );
      $dbh->do("INSERT INTO noderef (block,node_id) VALUES (?,?)", undef, ($args{block}, $args{node}) );
    }

    $dbh->commit;
  };
  if ($@) {
    my $msg = $@;
    $dbh->rollback;
    return ('FAIL', $msg);
  }

  _rpc('addOrUpdateRevRec', cidr => $args{block}, name => $args{rdns}, rpcuser => $args{user});
  return ('OK','OK');
} # end updateBlock()


## IPDB::deleteBlock()
# Removes an allocation from the database, including deleting IPs
# from poolips and recombining entries in freeblocks if possible
# Also handles "deleting" a static IP allocation, and removal of a master
# Requires a database handle, the block to delete, the routing depth (if applicable),
# the VRF ID, and a flag to indicate whether to delete associated forward DNS entries
# as well as the reverse entry
sub deleteBlock {
  my ($dbh,undef,$rdepth,$vrf,$delfwd,$user) = @_;
  my $cidr = new NetAddr::IP $_[1];

# For possible auto-VRF-ignoring (since public IPs shouldn't usually be present in more than one VRF)
# is_rfc1918 requires NetAddr::IP >= 4.059
# rather than doing this over and over and over.....
  my $tmpnum = $cidr->numeric;
# 192.168.0.0/16 -> 192.168.255.255  =>  3232235520 -> 3232301055
# 172.16.0.0/12  -> 172.31.255.255   =>  2886729728 -> 2887778303
# 10.0.0.0/8     -> 10.255.255.255   =>  167772160  -> 184549375
  my $isprivnet = (3232235520 <= $tmpnum && $tmpnum <= 3232301055) ||
        (2886729728 <= $tmpnum && $tmpnum <= 2887778303) ||
        (167772160 <= $tmpnum && $tmpnum <= 184549375);

  my $sth;

  # Magic variables used for odd allocation cases.
  my $container;
  my $con_type;

  # Collect info about the block we're going to delete
  my $binfo = getBlockData($dbh, $cidr, $rdepth, $vrf);

  # temporarily forced null, until a sane UI for VRF tracking can be found.
  $vrf = '';# if !$vrf; # as with SQL, the null value is not equal to ''.  *sigh*

  # To contain the error message, if any.
  my $msg = "Unknown error deallocating $binfo->{type} $cidr";
  my $goback;   # to put the parent in so we can link back where the deallocate started

  # Enable transactions and exception-on-errors... but only for this sub
  local $dbh->{AutoCommit} = 0;
  local $dbh->{RaiseError} = 1;

  # First case.  The "block" is a static IP
  # Note that we still need some additional code in the odd case
  # of a netblock-aligned contiguous group of static IPs
  if ($binfo->{type} =~ /^.i$/) {

    eval {
      $msg = "Unable to deallocate $disp_alloctypes{$binfo->{type}} $cidr";
      my ($pool,$pcust,$pvrf) = $dbh->selectrow_array("SELECT pool,custid,vrf FROM poolips WHERE ip=?", undef, ($cidr) );
##fixme: VRF and rdepth
      $dbh->do("UPDATE poolips SET custid=?,available='y',".
        "city=(SELECT city FROM allocations WHERE cidr=?),".
        "description='',notes='',circuitid='',vrf=? WHERE ip=?", undef, ($pcust, $pool, $pvrf, $cidr) );
      $goback = $pool;
      $dbh->commit;
    };
    if ($@) {
      $msg .= ": $@";
      eval { $dbh->rollback; };
      return ('FAIL',$msg);
    } else {
##fixme:  RPC return code?
      _rpc('delByCIDR', cidr => "$cidr", user => $user, delforward => $delfwd);
      return ('OK',"OK");
    }

  } elsif ($binfo->{type} eq 'mm') { # end alloctype =~ /.i/

##fixme: VRF limit
    $msg = "Unable to delete master block $cidr";
    eval {
      $dbh->do("DELETE FROM masterblocks WHERE cidr = ?", undef, ($cidr) );
      $dbh->do("DELETE FROM allocations WHERE cidr <<= ?", undef, ($cidr) );
      $dbh->do("DELETE FROM freeblocks WHERE cidr <<= ?", undef, ($cidr) );
      $dbh->commit;
    };
    if ($@) {
      $msg .= ": $@";
      eval { $dbh->rollback; };
      return ('FAIL', $msg);
    }

    # Have to handle potentially split reverse zones.  Assume they *are* split,
    # since if we added them here, they would have been added split.
# allow splitting reverse zones to be disabled, maybe, someday
#if ($splitrevzones && !$cidr->{isv6}) {
    my @zonelist;
    if (1 && !$cidr->{isv6}) {
      my $splitpoint = ($cidr->masklen <= 16 ? 16 : 24);        # hack pthui
      @zonelist = $cidr->split($splitpoint);
    } else {
      @zonelist = ($cidr);
    }
    my @fails;
    foreach my $subzone (@zonelist) {
      if ($rpc_url && !_rpc('delZone', zone => "$subzone", revrec => 'y', user => $user, delforward => $delfwd) ) {
        push @fails, ("$subzone" => $errstr);
      }
    }
    if (@fails) {
      return ('WARN',"Warning(s) deleting $cidr from reverse DNS:\n".join("\n", @fails));
    }
    return ('OK','OK');

  } else { # end alloctype master block case

    ## This is a big block; but it HAS to be done in a chunk.  Any removal
    ## of a netblock allocation may result in a larger chunk of free
    ## contiguous IP space - which may in turn be combined into a single
    ## netblock rather than a number of smaller netblocks.

    my $retcode = 'OK';
    my ($ptype,$pcity,$ppatt);

    eval {

##fixme:  add recursive flag to allow "YES DAMMIT DELETE ALL EVARYTHING!!1!!" without
# explicitly deleting any suballocations of the block to be deleted.

      # find the current parent of the block we're deleting
      my ($parent) = $dbh->selectrow_array("SELECT parent FROM allocations WHERE cidr=? AND rdepth=?",
        undef, ($cidr, $rdepth) );

      # Delete the block
      $dbh->do("DELETE FROM allocations WHERE cidr=? AND rdepth=?", undef, ($cidr, $rdepth) );

##fixme:  we could maybe eliminate a special case if we put masterblocks in the allocations table...?
      if ($rdepth == 1) {
        # parent is a master block.
        $ptype = 'mm';
        $pcity = '<NULL>';
        $ppatt = $dbh->selectrow_array("SELECT rdns FROM masterblocks WHERE cidr=?", undef, ($parent) );
      } else {
        # get that parent's details
        ($ptype,$pcity,$ppatt) = $dbh->selectrow_array("SELECT type,city,rdns FROM allocations ".
                "WHERE cidr=? AND rdepth=?", undef, ($parent, $rdepth-1) );
      }

      # munge the parent type a little
      $ptype = (split //, $ptype)[0];

##fixme:  you can't...  CAN NOT....  assign the same public IP to multiple things.
#  'Net don't work like that, homey.  Restrict VRF-uniqueness to private IPs?
# -> $isprivnet flag from start of sub

      my $fbrdepth = $rdepth;

      # check to see if any container allocations could be the "true" parent
      my ($tparent,$trdepth,$trtype,$tcity) = $dbh->selectrow_array("SELECT cidr,rdepth,type,city FROM allocations ".
        "WHERE (type='rm' OR type LIKE '_c') AND cidr >> ? ".
        "ORDER BY masklen(cidr) DESC", undef, ($cidr) );

      my $fparent;
      if ($tparent && $tparent ne $parent) {
        # found an alternate parent;  reset some parent-info bits
        $parent = $tparent;
        $ptype = (split //, $trtype)[0];
        $pcity = $tcity;
        ##fixme: hmm.  collect $rdepth into $goback here before vanishing?
        $retcode = 'WARNMERGE'; # may be redundant
        $goback = $tparent;
        # munge freeblock rdepth and parent to match true parent
        $dbh->do("UPDATE freeblocks SET rdepth = ?, parent = ?, routed = ? WHERE cidr <<= ? AND rdepth = ?", undef,
                ($trdepth+1, $parent, $ptype, $cidr, $rdepth) );
        $rdepth = $trdepth;
        $fbrdepth = $trdepth+1;
      }

      $parent = new NetAddr::IP $parent;
      $goback = "$parent,$fbrdepth";    # breadcrumb in case of live-parent-is-not-true-parent

      # Special case - delete pool IPs
      if ($binfo->{type} =~ /^.[pd]$/) {
        # We have to delete the IPs from the pool listing.
##fixme:  rdepth?  vrf?
        $dbh->do("DELETE FROM poolips WHERE pool = ?", undef, ($cidr) );
      }

      # Find out if the block we're deallocating is within a DSL pool (legacy goo)
      my ($pool,$poolcity,$pooltype,$pooldepth) = $dbh->selectrow_array(
        "SELECT cidr,city,type,rdepth FROM allocations WHERE type LIKE '_p' AND cidr >>= ?",
        undef, ($cidr) );

      # If so, return the block's IPs to the pool, instead of to freeblocks
## NB: not possible to currently cause this even via admin tools, only legacy data.
      if ($pool) {
        ## Deallocate legacy blocks stashed in the middle of a static IP pool
        ## This may be expandable to an even more general case of contained netblock, or other pool types.
        $retcode = 'WARNPOOL';
        $goback = "$pool,$pooldepth";
        # We've already deleted the block, now we have to stuff its IPs into the pool.
        $pooltype =~ s/p$/i/;   # change type to static IP
        my $sth2 = $dbh->prepare("INSERT INTO poolips (pool,ip,city,type,custid) VALUES ".
                "('$pool',?,'$poolcity','$pooltype','$defcustid')");
        # don't insert .0
##fixme:  need to not insert net, gateway, and bcast on "real netblock" pools (DHCPish)
        $sth2->execute($cidr->addr) unless $cidr->addr =~ m|\.0$|;
        foreach my $ip ($cidr->hostenum) {
          $sth2->execute($ip);
        }
        $cidr--;
        # don't insert .255
        $sth2->execute($cidr->addr) unless $cidr->addr =~ m|\.255$|;
      } else {  # done returning IPs from a block to a static DSL pool

        # If the block wasn't legacy goo embedded in a static pool, we check the
        # freeblocks in the identified parent to see if we can combine any of them.

        # if the block to be deleted is a container, move its freeblock(s) up a level, and reset their parenting info
        if ($binfo->{type} =~ /^.[mc]/) {
          # move the freeblocks into the parent
          # we don't insert a new freeblock because there could be a live reparented sub.
          $dbh->do("UPDATE freeblocks SET rdepth=rdepth-1,parent=?,routed=?,city=? ".
                "WHERE parent=? AND rdepth=?", undef,
                ($parent, $ptype, $pcity, $cidr, $rdepth+1) );
        } else {
          # ... otherwise, add the freeblock
          $dbh->do("INSERT INTO freeblocks (cidr, city, routed, parent, rdepth) VALUES (?,?,?,?,?)", undef,
                ($cidr, $pcity, $ptype, $parent, $rdepth) );
        }

##fixme: vrf
        # set up the query to get the list of blocks to try to merge.
        $sth = $dbh->prepare("SELECT cidr FROM freeblocks ".
                "WHERE parent = ? AND routed = ? AND rdepth = ? ".
                "ORDER BY masklen(cidr) DESC");

        $sth->execute($parent, $ptype, $fbrdepth);

# NetAddr::IP->compact() attempts to produce the smallest inclusive block
# from the caller and the passed terms.
# EG:  if you call $cidr->compact($ip1,$ip2,$ip3) when $cidr, $ip1, $ip2,
#       and $ip3 are consecutive /27's starting on .0 (.0-.31, .32-.63,
#       .64-.95, and .96-.128), you will get an array containing a single
#       /25 as element 0 (.0-.127).  Order is not important;  you could have
#       $cidr=.32/27, $ip1=.96/27, $ip2=.0/27, and $ip3=.64/27.

        my (@rawfb, @combinelist);
        my $i=0;
        # for each free block under $parent, push a NetAddr::IP object into one list, and
        # continuously use NetAddr::IP->compact to automagically merge netblocks as possible.
        while (my @data = $sth->fetchrow_array) {
          my $testIP = new NetAddr::IP $data[0];
          push @rawfb, $testIP;
          @combinelist = $testIP->compact(@combinelist);
        }

        # now that we have the full list of "compacted" freeblocks, go back over
        # the list of raw freeblocks, and delete the ones that got merged.
        $sth = $dbh->prepare("DELETE FROM freeblocks WHERE cidr=? AND parent=? AND rdepth=?");
        foreach my $rawfree (@rawfb) {
          next if grep { $rawfree == $_ } @combinelist; # skip if the raw block is in the compacted list
          $sth->execute($rawfree, $parent, $fbrdepth);
        }

        # now we walk the new list of compacted blocks, and see which ones we need to insert
        $sth = $dbh->prepare("INSERT INTO freeblocks (cidr,city,routed,parent,rdepth) VALUES (?,?,?,?,?)");
        foreach my $cme (@combinelist) {
          next if grep { $cme == $_ } @rawfb;   # skip if the combined block was in the raw list
          $sth->execute($cme, $pcity, $ptype, $parent, $fbrdepth);
        }

      } # done returning IPs to the appropriate place

      # If we got here, we've succeeded.  Whew!
      $dbh->commit;
    }; # end eval
    if ($@) {
      $msg .= ": $@";
      eval { $dbh->rollback; };
      return ('FAIL', $msg);
    } else {
##fixme:  RPC return code?
      _rpc('delByCIDR', cidr => "$cidr", user => $user, delforward => $delfwd, delsubs => 'y', parpatt => $ppatt);
      return ($retcode, $goback);
    }

  } # end alloctype != netblock

} # end deleteBlock()


## IPDB::getBlockData()
# Get CIDR or IP, custid, type, city, circuit ID, description, notes, modification time,
# private/restricted data, for a CIDR block or pool IP
# Also returns SWIP status flag for CIDR blocks or pool netblock for IPs
# Takes the block/IP to look up, routing depth, and VRF identifier
# Returns a hashref to the block data
sub getBlockData {
  my $dbh = shift;
  my $block = shift;
  my $rdepth = shift;
  my $vrf = shift || '';

  my $cidr = new NetAddr::IP $block;

  # better way to find IP allocations vs /32 "netblocks"
  my $btype = $dbh->selectrow_array("SELECT type FROM searchme WHERE cidr=?", undef, ($block) );

  if (defined($rdepth) && $rdepth == 0) {
    # Only master blocks exist at rdepth 0
    my $binfo = $dbh->selectrow_hashref("SELECT cidr AS block, 'mm' AS type, 0 AS parent, cidr,".
        " ctime, mtime, rwhois, vrf".
        " FROM masterblocks WHERE cidr = ?", undef, ($block) );
#       " FROM masterblocks WHERE cidr = ? AND vrf = ?", undef, ($block, $vrf) );
    return $binfo;
  } elsif ($btype =~ /^.i$/) {
    my $binfo = $dbh->selectrow_hashref("SELECT ip AS block, custid, type, city, circuitid, description,".
        " notes, modifystamp AS lastmod, privdata, vrf, pool, rdepth, rdns".
        " FROM poolips WHERE ip = ?", undef, ($block) );
#       " FROM poolips WHERE ip = ? AND vrf = ?", undef, ($block, $vrf) );
    return $binfo;
  } else {
    my $binfo = $dbh->selectrow_hashref("SELECT cidr AS block, parent, custid, type, city, circuitid, ".
        "description, notes, modifystamp AS lastmod, privdata, vrf, swip, rdepth, rdns".
        " FROM allocations WHERE cidr = ? AND rdepth = ?", undef, ($block, $rdepth) );
#       " FROM allocations WHERE cidr = ? AND rdepth = ? AND vrf = ?", undef, ($block, $rdepth, $vrf) );
    return $binfo;
  }
} # end getBlockData()


## IPDB::getBlockRDNS()
# Gets reverse DNS pattern for a block or IP.  Note that this will also
# retrieve any default pattern following the parent chain up, and check via
# RPC (if available) to see what the narrowest pattern for the requested block is
# Returns the current pattern for the block or IP.
sub getBlockRDNS {
  my $dbh = shift;
  my $block = shift;
  my $rdepth = shift;   # do we really need this?
  my %args = @_;

  $args{vrf} = '' if !$args{vrf};

  my $cidr = new NetAddr::IP $block;

  my ($rdns,$rfrom) = $dbh->selectrow_array("SELECT rdns,cidr FROM allocations WHERE cidr >>= ? UNION ".
        "SELECT rdns,cidr FROM masterblocks WHERE cidr >>= ? ORDER BY cidr", undef, ($cidr,$cidr) );

  if ($rpc_url) {
    # Use the first /16 or /24, rather than dithering over which sub-/14 /16
    # or sub-/19 /24 to retrieve - it's the least-wrong way to do things.

    my ($rpcblock) = ($cidr->masklen <= 24 ? $cidr->split( ($cidr->masklen <= 16 ? 16 : 24) ) : $cidr);

    my %rpcargs = (
        rpcuser => $args{user},
        group => $revgroup,     # not sure how this could sanely be exposed, tbh...
        cidr => "$rpcblock",
        );

    $rdns = _rpc('getRevPattern', %rpcargs);
  }

  # hmm.  do we care about where it actually came from?
  return $rdns;
} # end getBlockRDNS()


## IPDB::getNodeList()
# Gets a list of node ID+name pairs as an arrayref to a list of hashrefs
sub getNodeList {
  my $dbh = shift;
  
  my $ret = $dbh->selectall_arrayref("SELECT node_id, node_name FROM nodes ORDER BY node_type,node_id",
        { Slice => {} });
  return $ret;
} # end getNodeList()


## IPDB::getNodeName()
# Get node name from the ID
sub getNodeName {
  my $dbh = shift;
  my $nid = shift;

  my ($nname) = $dbh->selectrow_array("SELECT node_name FROM nodes WHERE node_id = ?", undef, ($nid) );
  return $nname;
} # end getNodeName()


## IPDB::getNodeInfo()
# Get node name and ID associated with a block
sub getNodeInfo {
  my $dbh = shift;
  my $block = shift;

  my ($nid, $nname) = $dbh->selectrow_array("SELECT nodes.node_id,node_name FROM nodes INNER JOIN noderef".
        " ON nodes.node_id=noderef.node_id WHERE noderef.block = ?", undef, ($block) );
  return ($nid, $nname);
} # end getNodeInfo()


## IPDB::mailNotify()
# Sends notification mail to recipients regarding an IPDB operation
sub mailNotify {
  my $dbh = shift;
  my ($action,$subj,$message) = @_;

  return if $smtphost eq 'smtp.example.com';   # do nothing if still using default SMTP host.

##fixme: need to redesign the breakdown/processing for $action for proper handling of all cases

# split action into parts for fiddlement.  nb: there are almost certainly better ways to do this.
  my @actionbits = split //, $action;

  # want to notify anyone who has specifically requested notify on *this* type ($action as passed),
  # on "all static IP types" or "all pool types" (and other last-char-in-type groupings), on eg "all DSL types",
  # and "all events with this action"
  my @actionsets = ($action);
##fixme: ick, eww.  really gotta find a better way to handle this...
  push @actionsets, ($actionbits[0].'.'.$actionbits[2],
        $actionbits[0].$actionbits[1].'.', $actionbits[0].'a') if $action =~ /^.{3}$/;

  my $mailer = Net::SMTP->new($smtphost, Hello => "ipdb.$domain");

  # get recip list from db
  my $sth = $dbh->prepare("SELECT reciplist FROM notify WHERE action=?");

  my %reciplist;
  foreach (@actionsets) {
    $sth->execute($_);
##fixme - need to handle db errors
    my ($recipsub) = $sth->fetchrow_array;
    next if !$recipsub;
    foreach (split(/,/, $recipsub)) {
      $reciplist{$_}++;
    }
  }

  return if !%reciplist;

  foreach my $recip (keys %reciplist) {
    $mailer->mail("ipdb\@$domain");
    $mailer->to($recip);
    $mailer->data("From: \"$org_name IP Database\" <ipdb\@$domain>\n",
        "To: $recip\n",
        "Date: ".strftime("%a, %d %b %Y %H:%M:%S %z",localtime)."\n",
        "Subject: {IPDB} $subj\n",
        "X-Mailer: IPDB Notify v".sprintf("%.1d",$IPDB::VERSION)."\n",
        "Organization: $org_name\n",
        "\n$message\n");
  }
  $mailer->quit;
}

# Indicates module loaded OK.  Required by Perl.
1;