| 1 | # ipdb/cgi-bin/IPDB.pm
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| 2 | # Contains functions for IPDB - database access, subnet mangling, block allocation, etc
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| 3 | ###
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| 4 | # SVN revision info
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| 5 | # $Date$
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| 6 | # SVN revision $Rev$
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| 7 | # Last update by $Author$
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| 8 | ###
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| 9 | # Copyright (C) 2004 - Kris Deugau
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| 10 |
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| 11 | package IPDB;
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| 12 |
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| 13 | use strict;
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| 14 | use warnings;
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| 15 | use Exporter;
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| 16 | use DBI;
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| 17 | use Net::SMTP;
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| 18 | use POSIX;
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| 19 | use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
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| 20 |
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| 21 | $VERSION = 2.0;
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| 22 | @ISA = qw(Exporter);
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| 23 | @EXPORT_OK = qw(&initIPDBGlocals &connectDB &finish &checkDBSanity &allocateBlock
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| 24 | &initPool &mailNotify);
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| 25 |
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| 26 | @EXPORT = (); # Export nothing by default.
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| 27 | %EXPORT_TAGS = ( ALL => [qw( &initIPDBGlocals &connectDB &checkDBSanity
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| 28 | &allocateBlock &initPool &mailNotify)]
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| 29 | );
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| 30 |
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| 31 | ##
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| 32 | ## Global variables
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| 33 | ##
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| 34 | our %disp_alloctypes;
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| 35 | our %list_alloctypes;
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| 36 |
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| 37 | # Let's initialize the globals.
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| 38 | ## IPDB::initIPDBGlobals()
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| 39 | # Initialize all globals. Takes a database handle, returns a success or error code
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| 40 | sub initIPDBGlobals {
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| 41 | my $dbh = $_[0];
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| 42 | my $sth;
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| 43 |
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| 44 | $sth = $dbh->prepare("select type,dispname from alloctypes");
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| 45 | $sth->execute;
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| 46 | return (undef,$sth->errstr) if $sth->err;
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| 47 |
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| 48 | while (my @data = $sth->fetchrow_array) {
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| 49 | $disp_alloctypes{$data[0]} = $data[1];
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| 50 | }
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| 51 | return (1,"OK");
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| 52 | } # end initIPDBGlobals
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| 53 |
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| 54 |
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| 55 | ## IPDB::connectDB()
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| 56 | # Creates connection to IPDB.
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| 57 | # Requires the database name, username, and password.
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| 58 | # Returns a handle to the db.
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| 59 | # Set up for a PostgreSQL db; could be any transactional DBMS with the
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| 60 | # right changes.
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| 61 | # This definition should be sub connectDB($$$) to be technically correct,
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| 62 | # but this breaks. GRR.
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| 63 | sub connectDB {
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| 64 | my ($dbname,$user,$pass) = @_;
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| 65 | my $dbh;
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| 66 | my $DSN = "DBI:Pg:dbname=$dbname";
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| 67 | # my $user = 'ipdb';
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| 68 | # my $pw = 'ipdbpwd';
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| 69 |
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| 70 | # Note that we want to autocommit by default, and we will turn it off locally as necessary.
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| 71 | # We may not want to print gobbledygook errors; YMMV. Have to ponder that further.
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| 72 | $dbh = DBI->connect($DSN, $user, $pass, {
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| 73 | AutoCommit => 1,
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| 74 | PrintError => 0
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| 75 | })
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| 76 | or return (undef, $DBI::errstr) if(!$dbh);
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| 77 |
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| 78 | # Return here if we can't select. Note that this indicates a
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| 79 | # problem executing the select.
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| 80 | my $sth = $dbh->prepare('select cidr from masterblocks');
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| 81 | $sth->execute();
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| 82 | return (undef,$DBI::errstr) if ($sth->err);
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| 83 |
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| 84 | # See if the select returned anything (or null data). This should
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| 85 | # succeed if the select executed, but...
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| 86 | $sth->fetchrow();
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| 87 | return (undef,$DBI::errstr) if ($sth->err);
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| 88 |
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| 89 | # If we get here, we should be OK.
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| 90 | return ($dbh,"DB connection OK");
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| 91 | } # end connectDB
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| 92 |
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| 93 |
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| 94 | ## IPDB::finish()
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| 95 | # Cleans up after database handles and so on.
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| 96 | # Requires a database handle
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| 97 | sub finish {
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| 98 | my $dbh = $_[0];
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| 99 | $dbh->disconnect;
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| 100 | } # end finish
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| 101 |
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| 102 |
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| 103 | # Quick check to see if the db is responding. A full integrity
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| 104 | # check will have to be a separate tool to walk the IP allocation trees.
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| 105 | sub checkDBSanity {
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| 106 | my $dbh = connectDB();
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| 107 |
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| 108 | if (!$dbh) {
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| 109 | print "Cannot connect to the database!";
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| 110 | } else {
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| 111 | # it connects, try a stmt.
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| 112 | my $sth = $dbh->prepare('select cidr from masterblocks');
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| 113 | my $err = $sth->execute();
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| 114 |
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| 115 | if ($sth->fetchrow()) {
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| 116 | # all is well.
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| 117 | return 1;
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| 118 | } else {
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| 119 | print "Connected to the database, but could not execute test statement. ".$sth->errstr();
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| 120 | }
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| 121 | }
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| 122 | # Clean up after ourselves.
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| 123 | $dbh->disconnect;
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| 124 | } # end checkDBSanity
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| 125 |
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| 126 |
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| 127 | ## IPDB::allocateBlock()
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| 128 | # Does all of the magic of actually allocating a netblock
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| 129 | # Requires database handle, block to allocate, custid, type, city,
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| 130 | # description, notes, circuit ID, block to allocate from,
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| 131 | # Returns a success code and optional error message.
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| 132 | sub allocateBlock {
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| 133 | my ($dbh,undef,undef,$custid,$type,$city,$desc,$notes,$circid) = @_;
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| 134 |
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| 135 | my $cidr = new NetAddr::IP $_[1];
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| 136 | my $alloc_from = new NetAddr::IP $_[2];
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| 137 | my $sth;
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| 138 |
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| 139 | # Enable transactions and error handling
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| 140 | local $dbh->{AutoCommit} = 0; # These need to be local so we don't
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| 141 | local $dbh->{RaiseError} = 1; # step on our toes by accident.
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| 142 |
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| 143 | if ($type =~ /^[cdsmw]i$/) {
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| 144 | eval {
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| 145 | # We'll just have to put up with the oddities caused by SQL (un)sort order
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| 146 | $sth = $dbh->prepare("select * from poolips where pool='$alloc_from'".
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| 147 | " and available='y' order by ip");
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| 148 | $sth->execute;
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| 149 |
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| 150 | # update poolips set custid='$custid',city='$city',available='n',
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| 151 | # description='$desc',notes='$notes',circuitid='$circid'
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| 152 | # where ip=(select ip from poolips where pool='$alloc_from'
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| 153 | # and available='y' order by ip limit 1);
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| 154 | ##err Need better handling here; what if there's no free IPs when this sub gets called?
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| 155 | my @data = $sth->fetchrow_array;
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| 156 | my $cidr = $data[1];
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| 157 |
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| 158 | $sth = $dbh->prepare("update poolips set custid='$custid',".
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| 159 | "city='$city',available='n',description='$desc',notes='$notes'".
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| 160 | "circuitid='$circid'".
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| 161 | " where ip='$cidr'");
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| 162 | $sth->execute;
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| 163 | ##err handle the error
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| 164 | };
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| 165 | if ($@) {
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| 166 | # failure
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| 167 | } else {
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| 168 | # success
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| 169 | }
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| 170 |
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| 171 | } else { # end IP-from-pool allocation
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| 172 | # Set $cidr here as it may not be a valid IP address elsewhere.
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| 173 | # my $cidr = new NetAddr::IP $webvar{fullcidr};
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| 174 |
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| 175 | if ($cidr == $alloc_from) {
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| 176 | # Easiest case- insert in one table, delete in the other, and go home. More or less.
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| 177 | # insert into allocations values (cidr,custid,type,city,desc) and
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| 178 | # delete from freeblocks where cidr='cidr'
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| 179 | # For data safety on non-transaction DBs, we delete first.
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| 180 |
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| 181 | eval {
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| 182 | if ($type eq 'rr') {
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| 183 | $sth = $dbh->prepare("update freeblocks set routed='y',city='$city'".
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| 184 | " where cidr='$cidr'");
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| 185 | $sth->execute;
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| 186 | $sth = $dbh->prepare("insert into routed values ('$cidr',".
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| 187 | $cidr->masklen.",'$city')");
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| 188 | $sth->execute;
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| 189 | } else {
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| 190 | # common stuff for end-use, dialup, dynDSL, pools, etc, etc.
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| 191 | ##err How to handle pools?
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| 192 | ##workhere
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| 193 | #print "IPDB.pm: $cidr\n";
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| 194 | $sth = $dbh->prepare("delete from freeblocks where cidr='$cidr'");
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| 195 | $sth->execute;
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| 196 |
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| 197 | $sth = $dbh->prepare("insert into allocations values ('$cidr',".
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| 198 | "'$custid','$type','$city','$desc','$notes',".
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| 199 | $cidr->masklen.",'$circid')");
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| 200 | $sth->execute;
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| 201 | ## if $type =~ /^[cdsmw]p$/ initpool($dbh,$cidr,$type)
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| 202 | } # routing vs non-routing netblock
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| 203 | $dbh->commit;
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| 204 | }; # end of eval
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| 205 | ##err
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| 206 | if ($@) {
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| 207 | eval { $dbh->rollback; };
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| 208 | return (2,$@);
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| 209 | } else {
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| 210 | ## do we return here or ?
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| 211 | return (1,"OK");
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| 212 | # Success
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| 213 | } # error handler
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| 214 |
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| 215 | } else { # cidr != alloc_from
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| 216 |
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| 217 | # Hard case. Allocation is smaller than free block.
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| 218 | my $wantmaskbits = $cidr->masklen;
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| 219 | my $maskbits = $alloc_from->masklen;
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| 220 |
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| 221 | my @newfreeblocks; # Holds free blocks generated from splitting the source freeblock.
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| 222 |
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| 223 | # This determines which blocks will be left "free" after allocation. We take the
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| 224 | # block we're allocating from, and split it in half. We see which half the wanted
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| 225 | # block is in, and repeat until the wanted block is equal to one of the halves.
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| 226 | my $i=0;
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| 227 | my $tmp_from = $alloc_from; # So we don't munge $alloc_from
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| 228 | while ($maskbits++ < $wantmaskbits) {
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| 229 | my @subblocks = $tmp_from->split($maskbits);
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| 230 | $newfreeblocks[$i++] = (($cidr->within($subblocks[0])) ? $subblocks[1] : $subblocks[0]);
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| 231 | $tmp_from = ( ($cidr->within($subblocks[0])) ? $subblocks[0] : $subblocks[1] );
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| 232 | } # while
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| 233 |
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| 234 | # Begin SQL transaction block
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| 235 | eval {
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| 236 | # Delete old freeblocks entry
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| 237 | $sth = $dbh->prepare("delete from freeblocks where cidr='$alloc_from'");
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| 238 | $sth->execute();
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| 239 |
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| 240 | # now we have to do some magic for routing blocks
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| 241 | if ($type eq 'rr') {
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| 242 | # Insert the new freeblocks entries
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| 243 | # Note that non-routed blocks are assigned to <NULL>
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| 244 | $sth = $dbh->prepare("insert into freeblocks values (?, ?, '<NULL>','n')");
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| 245 | foreach my $block (@newfreeblocks) {
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| 246 | $sth->execute("$block", $block->masklen);
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| 247 | }
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| 248 | # Insert the entry in the routed table
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| 249 | $sth = $dbh->prepare("insert into routed values ('$cidr',".
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| 250 | $cidr->masklen.",'$city')");
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| 251 | $sth->execute;
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| 252 | # Insert the (almost) same entry in the freeblocks table
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| 253 | $sth = $dbh->prepare("insert into freeblocks values ('$cidr',".
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| 254 | $cidr->masklen.",'$city','y')");
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| 255 | $sth->execute;
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| 256 |
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| 257 | } else { # done with alloctype == rr
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| 258 |
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| 259 | # Insert the new freeblocks entries
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| 260 | $sth = $dbh->prepare("insert into freeblocks values (?, ?, ".
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| 261 | "(select city from routed where cidr >>= '$cidr'),'y')");
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| 262 | foreach my $block (@newfreeblocks) {
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| 263 | $sth->execute("$block", $block->masklen);
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| 264 | }
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| 265 | # Insert the allocations entry
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| 266 | $sth = $dbh->prepare("insert into allocations values ('$cidr',".
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| 267 | "'$custid','$type','$city','$desc','$notes',".$cidr->masklen.
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| 268 | ",'$circid')");
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| 269 | $sth->execute;
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| 270 | ##err do we initPool here, or force the caller to do it?
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| 271 | # Flexibility says we let the caller do it, to allow more options.
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| 272 | } # done with netblock alloctype != rr
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| 273 | $dbh->commit;
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| 274 | }; # end eval
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| 275 | if ($@) {
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| 276 | eval { $dbh->rollback; };
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| 277 | return (2,$@);
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| 278 | } else {
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| 279 | ##err
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| 280 | return (1,"OK");
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| 281 | }
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| 282 |
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| 283 | } # end fullcidr != alloc_from
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| 284 |
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| 285 | } # end static-IP vs netblock allocation
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| 286 |
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| 287 | } # end allocateBlock()
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| 288 |
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| 289 |
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| 290 | ## IPDB::initPool()
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| 291 | # Initializes a pool
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| 292 | # Requires a database handle, the pool CIDR, type, city, and a parameter
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| 293 | # indicating whether the pool should allow allocation of literally every
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| 294 | # IP, or if it should reserve network/gateway/broadcast IPs
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| 295 | sub initPool {
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| 296 | my ($dbh,undef,$type,$city,$class) = @_;
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| 297 | my $pool = new NetAddr::IP $_[1];
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| 298 |
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| 299 | my $pooltype = ($type =~ /^(.)p$/);
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| 300 | my $sth;
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| 301 |
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| 302 | # Enable transactions and error handling
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| 303 | local $dbh->{AutoCommit} = 0; # These need to be local so we don't
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| 304 | local $dbh->{RaiseError} = 1; # step on our toes by accident.
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| 305 |
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| 306 | # Begin SQL transaction block
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| 307 | eval {
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| 308 | # have to insert all pool IPs into poolips table as "unallocated".
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| 309 | $sth = $dbh->prepare("insert into poolips values ('$pool',".
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| 310 | " ?, '6750400', '$city', '$pooltype', 'y', '', '', '')");
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| 311 | my @poolip_list = $pool->hostenum;
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| 312 | if ($class) { # (real netblock)
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| 313 | for (my $i=1; $i<=$#poolip_list; $i++) {
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| 314 | $sth->execute($poolip_list[$i]->addr);
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| 315 | }
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| 316 | } else { # (DSL-ish block - *all* IPs available
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| 317 | $sth->execute($pool->addr);
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| 318 | for (my $i=0; $i<=$#poolip_list; $i++) {
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| 319 | $sth->execute($poolip_list[$i]->addr);
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| 320 | }
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| 321 | $pool--;
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| 322 | $sth->execute($pool->addr);
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| 323 | }
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| 324 | $dbh->commit;
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| 325 | }; # end eval
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| 326 | if ($@) {
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| 327 | eval { $dbh->rollback; };
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| 328 | print "$@\n";
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| 329 | return (2,"$@");
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| 330 | } else {
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| 331 | ##err
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| 332 | return (1,"OK");
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| 333 | }
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| 334 |
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| 335 | } # end initPool()
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| 336 |
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| 337 |
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| 338 | ## IPDB::mailNotify()
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| 339 | # Sends notification mail to recipients regarding an IPDB operation
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| 340 | sub mailNotify ($$$) {
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| 341 | my ($recip,$subj,$message) = @_;
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| 342 | my $mailer = Net::SMTP->new("smtp.example.com", Hello => "ipdb.example.com");
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| 343 |
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| 344 | $mailer->mail('ipdb@example.com');
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| 345 | $mailer->to($recip);
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| 346 | $mailer->data("From: \"IP Database\" <ipdb\@example.com>\n",
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| 347 | "Date: ".strftime("%a, %d %b %Y %H:%M:%S %z",localtime)."\n",
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| 348 | "Subject: {IPDB} $subj\n",
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| 349 | "X-Mailer: IPDB Notify v".sprintf("%.1d",$IPDB::VERSION)."\n",
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| 350 | "Organization: Example Corp\n",
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| 351 | "\n$message\n");
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| 352 | $mailer->quit;
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| 353 | }
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| 354 |
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| 355 | # Indicates module loaded OK. Required by Perl.
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| 356 | 1;
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