From d5521c6bd294a235c3437ef10df135da0f65b759 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <sipa@ulyssis.org>
Date: Wed, 18 Apr 2012 01:22:39 +0200
Subject: [PATCH] combine.pl: creates a seedlist from several dnsseed.dump
 files

---
 combine.pl | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 combine.pl

diff --git a/combine.pl b/combine.pl
new file mode 100644
index 0000000..5f63bcb
--- /dev/null
+++ b/combine.pl
@@ -0,0 +1,48 @@
+#!/usr/bin/perl -w
+
+use strict;
+
+sub loadFile {
+  my ($file) = @_;
+  my %ret;
+  open FILE,$file;
+  while (<FILE>) {
+    my ($addr,$p2h,$p8h,$p1d,$p1w,$p1m) = split(/\s+/,$_);
+    if ($p1m =~ /\A([1-9.]+)%\Z/) {
+      my $x = log($1*0.01)/log(0.5);
+      $ret{$addr} = $x;
+    }
+  }
+  close FILE;
+  return \%ret;
+}
+
+sub combine {
+  my ($f1,$f2) = @_;
+  my %ret;
+  for my $k1 (keys %{$f1}) {
+    if (defined $f2->{$k1}) {
+      $ret{$k1} = $f1->{$k1} + $f2->{$k1};
+    }
+  }
+  return \%ret;
+}
+
+my $res;
+my $n=0;
+for my $file (@ARGV) {
+  my $r = loadFile($file);
+  if ($res) {
+    $res = combine($res,$r);
+  } else {
+    $res = $r;
+  }
+  $n++;
+}
+
+for my $addr (sort { $res->{$a} <=> $res->{$b} } (keys %{$res})) {
+  if ($addr =~ /\A(\d+)\.(\d+)\.(\d+)\.(\d+):8333/) {
+    my $a = $1*0x1000000 + $2*0x10000 + $3*0x100 + $4;
+    printf "0x%08x %s %g%%\n",$a,$addr,exp(log(0.5)*$res->{$addr}/$n)*100;
+  }
+}