TPODER / Net-NfDump-0.12 / examples / download_asn_db 

            

              
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#!/usr/bin/perl -w 
#
use strict;
#use BerkeleyDB;
#use MLDBM qw (DB_File);
use Net::IP::LPM;
use POSIX;
use Sys::Syslog qw(:DEFAULT setlogsock); 
use Getopt::Std;
my $VERSION     = "0.04";
# path to bgpdump, wget 
# bgpdump is available on 
# https://bitbucket.org/ripencc/bgpdump/wiki/Home
# please compile it and place into $PATH 
my $BGPDUMP             = "bgpdump -vm %s";
my $WGET                = "wget -q -O %s %s";
my $GUNZIP              = "gunzip -t %s";
# any source with valid bgpdata can be used. The bgp 
# databases from ripe becoons is available on 
# http://www.ripe.net/data-tools/stats/ris/ris-raw-data
my $BVIEW_URL   = "http://data.ris.ripe.net/rrc03/latest-bview.gz";
# directory where download and updated file will be stored
# the directory must be writable 
my $DBDIR               = "/var/db/flowtools";
my $ASN_DB              = $DBDIR.'/asns.db';
my $ASN_DB_TXT  = $DBDIR.'/asns.txt';
my $BVIEW_DB    = $DBDIR.'/latest-bview.gz';
my $DEBUG               = 1;
my $LOGNAME     = substr($0, rindex($0, "/") + 1);;
my $LOGFACILITY = "daemon.info";
my $LPM;
my %OPTS;
my %ASNS;
# logging rutine
sub mylog {
        my ($msg, @par) = @_;
        my $lmsg = sprintf($msg, @par);
        if ($DEBUG > 0) {
                printf "%s[%d]: %s\n", strftime("%Y-%m-%d.%H:%M:%S", localtime), $$, $lmsg;
        }
        setlogsock('unix');
        openlog("$LOGNAME\[$$\]", 'ndelay', 'user');
        syslog($LOGFACILITY, $lmsg);
}
sub usage() {
        printf "Command downloads bgpdump database from URL and converts to BerkeleyDB format\n";
        printf "Options: \n\n";
        printf " -d <level> : debug level 1 - prints logs output to stdout, 10 - more detailed\n";
        printf " -w         : do not fetch bgpview file (%s) from URL\n", $BVIEW_DB;
        printf " -u <url>   : overwrite default URL %s \n", $BVIEW_URL;
        printf " -a <file>  : overwrite default database ASN file %s \n", $ASN_DB;
        printf " -t <file>  : overwrite default text database ASN file %s \n", $ASN_DB_TXT;
        printf " -b <file>  : overwrite bgpview file %s \n\n", $BVIEW_DB;
        printf " Version: %s \n", $VERSION;
}
if (!getopts("d:wu:a:b:t:", \%OPTS)) {
        usage();
        exit 1;
}
$DEBUG = $OPTS{"d"} if (defined($OPTS{"d"}));
$BVIEW_URL = $OPTS{"u"} if (defined($OPTS{"u"}));
$BVIEW_DB = $OPTS{"b"} if (defined($OPTS{"b"}));
$ASN_DB = $OPTS{"a"} if (defined($OPTS{"a"}));
$ASN_DB_TXT = $OPTS{"t"} if (defined($OPTS{"t"}));
# download bgpdata file 
if (!defined($OPTS{'w'})) {
        mylog("Downloading bgpview database from %s", $BVIEW_URL);
        system(sprintf($WGET, $BVIEW_DB, $BVIEW_URL));
        if ($? != 0) {
                mylog("Can not dowload bgpview database from %s", $BVIEW_URL);
                exit 1;
        }
}
# verify file
system(sprintf($GUNZIP, $BVIEW_DB));
if ($? != 0) {
        mylog("Invalid bgpview database %s", $BVIEW_DB);
        exit 1;
}
mylog("Updating ASN database %s", $ASN_DB);
my $cmd = sprintf($BGPDUMP, $BVIEW_DB);
open F1, "$cmd |";
#if (!tie %ASN, 'MLDBM', $ASN_DB.".tmp") {
$LPM = Net::IP::LPM->new($ASN_DB.".tmp");
if (!$LPM) {
        mylog "Can not open $ASN_DB.tmp: $!";
        exit 1; 
}
my $cnt = 1;
while (<F1>) {
        my @a1 = split(/\|/);
my ($prefix, $aspath) = ($a1[5], $a1[6]);
    # empty AS ptaht - locally connected networks
        next if (!defined($aspath) || $aspath eq "");
     
        # AS in { }
        $aspath =~ s/{//g;
        $aspath =~ s/}//g;
        $aspath =~ s/,/ /g;
     
        my ($origin) = reverse(split(/ /, $aspath));
     
    if (defined($prefix) && defined($origin) ) {
                printf "Adding: %s -> %s \n", $prefix, $origin if ($DEBUG > 10);
                if (!$LPM->add($prefix, $origin)) {
                        mylog("Cannot add entry %s -> %s. Exiting.", $prefix, $origin);
                        exit 1;
                }
                $ASNS{$prefix} = $origin;
                $cnt++;
        } else {
                mylog("Invalid line form bgpdump ($_). Exiting.");
                exit 1;
        }
}
mylog("Rebuilding prefix database");
$LPM->rebuild();
close F1;
mylog("Dumping text format database into %s", $ASN_DB_TXT);
open FT, " > $ASN_DB_TXT";
foreach  my $p ( sort keys %ASNS )  {
        printf FT "%s %s\n", $p, $ASNS{$p};     
}
close FT;
rename($ASN_DB.".tmp", $ASN_DB);
mylog("ASN database %s updated (%d recs processed)", $ASN_DB, $cnt);