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One of the first steps will be to choose a perl module to support authentication of IPv6 addresses. Examples possibly include:
- RegExp::IPv6. There a couple of possibly useful subroutines in traceroute.pl (obtainable here):
Code Block sub valid_ip { #Given a string, it checks whether it is a valid IP name (returns "n"), #or valid IPv4 address (returns "4"), or valid IPv6 address returns "6"). #If invalid it returnr IP name see: http://stackoverflow.com/questions/106179/regular-expression-to-match-hostname-or-ip-address #For IPv4 address see: http://answers.oreilly.com/topic/318-how-to-match-ipv4-addresses-with-regular-expressions/ #For IPv6 address see: http://forums.dartware.com/viewtopic.php?t=452 #Test cases for IPv6 address (we are using aeron) see http://download.dartware.com/thirdparty/test-ipv6-regex.pl #Examples: if(length($_[0])<256) { if($_[0]=~/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/){#IPv4 address return "4"; } elsif($_[0]=~/^(((?=(?>.*?::)(?!.*::)))(::)?([0-9A-F]{1,4}::?){0,5}|([0-9A-F]{1,4}:){6})(\2([0-9A-F]{1,4}(::?|$)){0,2}|((25[0-5]|(2[0-4]|1[0-9]|[1-9])?[0-9])(\.|$)){4}|[0-9A-F]{1,4}:[0-9A-F]{1,4})(?<![^:]:)(?<!\.)\z/i) {#IPv6 Address return "6"; } elsif($_[0]=~/^([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])(\.([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]{0,61}[a-zA-Z0-9]))*$/) {#Name #if($_[0]=~/(([a-z0-9]+|([a-z0-9]+[-]+[a-z0-9]+))[.])+/) {#Name return "n"; } } return "0"; }
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sub gethostbyname6 {
#gethostbyname6 yields the IPv6 or IPv6 address for a host name
# uses dig to get AAAA address for given name
# returns IPv6 address if successful else returns ""
my $name=$_[0];
my $ipaddr="";
if($ipv eq "4" && gethostbyname($name)) {
$ipaddr=gethostbyname($name);
my ($a1, $b1, $c1, $d1)=unpack('C4',$ipaddr);
$ipaddr=$a1.".".$b1.".".$c1.".".$d1;
}
else {
my $cmd="dig $name -t AAAA";
if(!($cmd=~ /^([\w\.:\-\s]+)$/)) {#Untaint Check for valid characters
print "<font color='red'><b>Invalid (tainted) command = $cmd, traceroute aborted!</b></font><br>\n";
exit 1;
}
$cmd=$1; #Untaint $cmd.
my @result=grep(/\s+AAAA\s+/,`$cmd`);
foreach my $result(@result) {
if($result =~ /^;/) {next;}
my @tokens=split(/\s+/,$result);
if(defined($tokens[4])) {$ipaddr=$tokens[4]; last;}
}
}
return $ipaddr;
}
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- I believe the measurements code (pinger2.pl) will work with both IPv4 and IPv6. This was part of an IPv6 project at SLAC many years ago that used the SLAC IPv6 allocation about which there is a presentation. Thus for monitoring sites pinger2.pl should be OK.
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