This appears to give sane output for the test data :).

#!/usr/bin/perl -w
use strict;

my @fields = qw/ip icmp tcp udp events drops/;
my %count;
my $date;

open (INFILE, "<&","DATA") or die ("Error Opening File $!\n");   
open (OUTFILE, ">&", 'STDOUT') or die ("Error Opening File $!\n");
print OUTFILE "date,ip_cnt,icmp_cnt,tcp_cnt,udp_cnt,events,drops \n";

while ( my $line = <INFILE>) {
    if ($line =~ m/^(\d{4})(\w{3})(\d+).+/) {
        print OUTFILE join(",", $date, @count{@fields}), "\n" if defin
+ed $date;
        %count = (); # reset the counters
        $date = join ' ',($2,$3,$1);
        next;
    }
    elsif ($line =~ m/^EVENT1:\s+\[\w+\]\s+\(IP=(\d+),
                                            ICMP=(\d+),
                                            TCP=(\d+),
                                            UDP=(\d+),
                                            EVENTS=(\d+),
                                            DROP=(\d+),.+/x)
    {
        $count{ip} += $1;
        $count{icmp} += $2;
        $count{tcp} += $3;
        $count{udp} += $4;
        $count{events} += $5;
        $count{drops} += $6;
        #print "$line \n";
        next;
    }
    else 
    {
        # Line that is neither a date or a event
        next;
    }
}
print OUTFILE join(",", $date, @count{@fields}), "\n" if defined $date
+;
__DATA__
2003Aug01/
EVENT1: [HEARTBEAT] (IP=1260953,ICMP=898,TCP=1236959,UDP=22477,EVENTS=
+950,DROP=0,VER=6.0.1)
EVENT1: [HEARTBEAT] (IP=1217149,ICMP=874,TCP=1193416,UDP=22133,EVENTS=
+811,DROP=0,VER=6.0.1)
2003Aug02/
EVENT1: [HEARTBEAT] (IP=640626,ICMP=855,TCP=620893,UDP=18614,EVENTS=71
+4,DROP=0,VER=6.0.1)
EVENT1: [HEARTBEAT] (IP=652513,ICMP=830,TCP=631758,UDP=19671,EVENTS=72
+2,DROP=0,VER=6.0.1)
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