Imported Upstream version 1.20

README

@@ -1,4 +1,4 @@
-DNS FLood Detector 1.12
+DNS FLood Detector 1.2
 Dennis Opacki
 dopacki@adotout.com
 
@@ -21,6 +21,16 @@ By default, it will count dns queries directed to any address in the same
 network as the primary IP address on the interface being watched; the -A,
 -M, and -Q options can be used to modify this behaviour.
 
+As of version 1.2, DNS Flood Detector can now send source IP request
+data to a network-based collector as JSON. This lets you gather near
+real-time information about who is using your DNS servers, and from
+where. I've included a sample application called dns_flood_collector.pl,
+which you can use to receive and report these data. The output of this
+program can be easily fed into a graphing tool, such as Caida's 
+plot-latlong:
+
+http://www.caida.org/tools/visualization/plot-latlong/
+
 How do I build it?
 
 Execute ./configure.pl to select the appropriate make target. Then simply
@@ -41,7 +51,7 @@ What platforms does it work on?
 
 Linux, BSDI, FreeBSD, Mac OSX, Solaris
 
-Will it run under Windows {95,98,NT,2000,XP}?  
+Will it run under Windows {95,98,NT,2000,XP,2003,2008 or Win7}?  
 
 Maybe. I haven't tried. If it doesn't, feel free to submit a fix. 
 
@@ -62,6 +72,9 @@ Usage: ./dns_flood_detector [OPTION]
 -d                     run in background in daemon mode
 -D	               dump dns packets (implies -b)
 -v                     verbose output - use again for more verbosity
+-s                     send source IP stats to collector as JSON
+-z N.N.N.N             address to send stats to (default 226.1.1.2)
+-p N                   UDP port to send stats to (default 2000)
 -h                     display this usage information
 
 Sample Output:

dns_flood_collector.pl

@@ -0,0 +1,157 @@
+#!/usr/bin/perl
+
+use strict;
+use threads;
+use threads::shared;
+use Sys::Syslog;
+use Data::Dumper;
+use Getopt::Long;
+use POSIX;
+use IO::Socket::Multicast;
+use JSON;
+
+# Native Maxmind library - http://www.maxmind.com/download/geoip/api/perl/
+# requires: http://www.maxmind.com/app/c
+use Geo::IP;
+
+# set these to the same port and multicast (or unicast) address as the detector
+use constant GROUP => '226.1.1.2';
+use constant PORT  => '2000';
+
+my %ipc_source :shared;
+my %ipc_customer :shared;
+my $time_to_die :shared = 0;
+my $debug;
+my $foreground=0;
+
+# determines how often you want to aggregage and write-out stats dumps
+my $interval = 60;
+
+# you can get the binary format GeoLiteCity.dat from Maxmind
+# http://www.maxmind.com/app/geolitecity
+my $gi = Geo::IP->open("/usr/local/GeoLiteCity.dat",GEOIP_MEMORY_CACHE | GEOIP_CHECK_CACHE);
+
+# adjust this to the path where you want to keep the 
+sub PATH {'/tmp/'}
+
+$|=1;
+
+GetOptions(
+  "debug" => \$debug,
+  "foreground" => \$foreground,
+  "interval=s" => \$interval,
+);
+
+
+main();
+exit();
+
+sub main() {
+
+  # daemonize unless running in foreground
+  unless ($foreground){
+    daemonize();
+  }
+
+  # prepare data acquisition thread
+  threads->new(\&get_data);
+
+  while (! $time_to_die ) {
+
+    # record time started to help evenly space runs
+    my $start_run = time();
+    my $next_run = $start_run + $interval;
+
+    # de-serialize latest copy of source address structure
+    # execute this in a isolated scope so that lock goes out of scope
+    {
+      my $source_distance;
+
+      # lock data structure to prevent other thread from updating it
+      lock(%ipc_source); 
+
+      # open coordinates file for graph generation
+      open(CRDS, ">".PATH."/coords.txt.tmp");
+
+      # calculate great circle distance between each source IP and local POP
+      foreach my $key (keys %ipc_source) { 
+
+        eval {
+        my $r = $gi->record_by_addr($key);
+
+        # write raw entry to coordinates file             
+        print CRDS $key.",".$ipc_source{$key}.",".$r->latitude.",".$r->longitude."\n";
+        };
+        if ($@) {
+          print CRDS $key.",".$ipc_source{$key}.",0,0\n";
+        }
+      }
+
+      # close coordinate file
+      close CRDS;
+      system("mv ".PATH."/coords.txt.tmp ".PATH."/coords.txt");
+
+      # clean out structure for next sample period
+      %ipc_source = ();
+    }
+
+    # sleep to make the interval
+    while((my $time_left = ($next_run - time())) > 0) {
+      sleep($time_left);
+    }
+  }
+  threads->join();
+  return;
+}
+
+# fetch data from UDP multicast
+sub get_data() {
+
+  # set up our multicast listener
+  # note: this will receive unicast fine too
+  my $sock = IO::Socket::Multicast->new(LocalPort=>PORT,ReuseAddr=>1);
+  $sock->mcast_add(GROUP) || die "Couldn't set group: $!\n";
+
+
+  while (  ! $time_to_die  ) {
+    my $data;
+    next unless $sock->recv($data,1500);
+
+    # decode JSON
+    eval {
+      my $obj = decode_json $data;
+      print Dumper $obj;
+      foreach my $ip (keys %{$obj->{data}}) {
+        my $count = $obj->{data}->{$ip};
+        lock(%ipc_source);
+        $ipc_source{$ip}+=$count;
+      }
+    };
+
+  }
+
+  # done!
+  threads->exit();
+}
+
+# daemonize application
+sub daemonize {
+
+  chdir '/' or die "Can't chdir to /: $!";
+  open STDIN, '/dev/null' or die "Can't read /dev/null: $!";
+  open STDOUT, '>/dev/null';
+
+  # fork and exit parent
+  my $pid = fork();
+  exit if $pid;
+  die "Couldn't fork: $!" unless defined ($pid);
+  POSIX::setsid() || die ("$0 can't start a new session: $!");        
+  open STDERR, '>&STDOUT' or die "Can't dup stdout: $!";
+  
+  # signal handlers
+  $SIG{KILL} = \&handler;
+}
+
+sub handler {
+  $time_to_die = 1;
+}

dns_flood_detector.h

@@ -30,6 +30,13 @@
 #endif
 #define NS_MAXDNAME 1025
 #define MAXSYSLOG 192
+#define MAXMESSAGE 1200
+#define MAXDATALET 64
+#define MAXHEAD 300
+#define MAX_TIME_LEN 20
+#define DEFAULT_PORT 2000
+#define DEFAULT_IP "226.1.1.2"
+#define HOST_NAME_MAX 254
 
 // evil Solaris hack
 #ifdef __sun__
@@ -41,10 +48,12 @@ typedef uint32_t u_int32_t;
 // prototypes
 void handle_IP(u_char *args,const struct pcap_pkthdr* pkthdr,const u_char* packet);
 int calculate_averages();
+int saddr_stats(int sock, struct sockaddr_in addr, char *hostname);
 int scour_bucket(int i);
 int find_bucket(struct in_addr *ip_src);
 int daemonize(void);
 int malloc_fail(char * var, int size);
+int microsleep(unsigned int usec);
 
 // data structures
 struct my_dns {

makefiles/Makefile-OSX

@@ -1,5 +1,5 @@
 CFLAGS+=-Wall -O -g -I/usr/local/include -I/usr/include
-LDLIBS=-L/usr/local/lib -lpcap -lpthread -lm
+LDLIBS=-lpcap -lpthread -lm
 
 all: dns_flood_detector
 	strip dns_flood_detector