4915e69508
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@6017 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
309 lines
8.3 KiB
Perl
Executable File
309 lines
8.3 KiB
Perl
Executable File
#!/usr/bin/env perl
|
|
# IBM(c) 2010 EPL license http://www.eclipse.org/legal/epl-v10.html
|
|
package xCAT::NetworkUtils;
|
|
|
|
BEGIN
|
|
{
|
|
$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
|
|
}
|
|
|
|
# if AIX - make sure we include perl 5.8.2 in INC path.
|
|
# Needed to find perl dependencies shipped in deps tarball.
|
|
if ($^O =~ /^aix/i) {
|
|
use lib "/usr/opt/perl5/lib/5.8.2/aix-thread-multi";
|
|
use lib "/usr/opt/perl5/lib/5.8.2";
|
|
use lib "/usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi";
|
|
use lib "/usr/opt/perl5/lib/site_perl/5.8.2";
|
|
}
|
|
|
|
use lib "$::XCATROOT/lib/perl";
|
|
use POSIX qw(ceil);
|
|
use File::Path;
|
|
use Socket;
|
|
use strict;
|
|
use warnings "all";
|
|
my $netipmodule = eval {require Net::IP;};
|
|
|
|
our @ISA = qw(Exporter);
|
|
|
|
#--------------------------------------------------------------------------------
|
|
|
|
=head1 xCAT::NetworkUtils
|
|
|
|
=head2 Package Description
|
|
|
|
This program module file, is a set of network utilities used by xCAT commands.
|
|
|
|
=cut
|
|
|
|
#-------------------------------------------------------------
|
|
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
=head3 gethostnameandip
|
|
Works for both IPv4 and IPv6.
|
|
Takes either a host name or an IP address string
|
|
and performs a lookup on that name,
|
|
returns an array with two elements: the hostname, the ip address
|
|
if the host name or ip address can not be resolved,
|
|
the corresponding element in the array will be undef
|
|
Arguments:
|
|
hostname or ip address
|
|
Returns: the hostname and the ip address
|
|
Globals:
|
|
|
|
Error:
|
|
none
|
|
Example:
|
|
my ($ip, $host) = xCAT::NetworkUtils->gethostnameandip($iporhost);
|
|
Comments:
|
|
none
|
|
=cut
|
|
|
|
#-------------------------------------------------------------------------------
|
|
sub gethostnameandip()
|
|
{
|
|
my ($class, $iporhost) = @_;
|
|
|
|
if (($iporhost =~ /\d+\.\d+\.\d+\.\d+/) || ($iporhost =~ /:/)) #ip address
|
|
{
|
|
return (xCAT::NetworkUtils->gethostname($iporhost), $iporhost);
|
|
}
|
|
else #hostname
|
|
{
|
|
return ($iporhost, xCAT::NetworkUtils->getipaddr($iporhost));
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
=head3 gethostname
|
|
Works for both IPv4 and IPv6.
|
|
Takes an IP address string and performs a lookup on that name,
|
|
returns the hostname of the ip address
|
|
if the ip address can not be resolved, returns undef
|
|
Arguments:
|
|
ip address
|
|
Returns: the hostname
|
|
Globals:
|
|
cache: %::iphosthash
|
|
Error:
|
|
none
|
|
Example:
|
|
my $host = xCAT::NetworkUtils->gethostname($ip);
|
|
Comments:
|
|
none
|
|
=cut
|
|
|
|
#-------------------------------------------------------------------------------
|
|
sub gethostname()
|
|
{
|
|
my ($class, $iporhost) = @_;
|
|
|
|
my $socket6support = eval { require Socket6 };
|
|
|
|
if (($iporhost !~ /\d+\.\d+\.\d+\.\d+/) && ($iporhost !~ /:/))
|
|
{
|
|
#why you do so? pass in a hostname and only want a hostname??
|
|
return $iporhost;
|
|
}
|
|
#cache, do not lookup DNS each time
|
|
if (defined($::iphosthash{$iporhost}) && $::iphosthash{$iporhost})
|
|
{
|
|
return $::iphosthash{$iporhost};
|
|
}
|
|
else
|
|
{
|
|
if ($socket6support) # the getaddrinfo and getnameinfo supports both IPv4 and IPv6
|
|
{
|
|
my ($family, $socket, $protocol, $ip, $name) = Socket6::getaddrinfo($iporhost,0);
|
|
my $host = (Socket6::getnameinfo($ip))[0];
|
|
if ($host eq $iporhost) # can not resolve
|
|
{
|
|
return undef;
|
|
}
|
|
if ($host)
|
|
{
|
|
$host =~ s/\..*//; #short hostname
|
|
}
|
|
return $host;
|
|
}
|
|
else
|
|
{
|
|
my $hostname = gethostbyaddr(inet_aton($iporhost), AF_INET);
|
|
$hostname =~ s/\..*//; #short hostname
|
|
return $hostname;
|
|
}
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
=head3 getipaddr
|
|
Works for both IPv4 and IPv6.
|
|
Takes a hostname string and performs a lookup on that name,
|
|
returns the the ip address of the hostname
|
|
if the hostname can not be resolved, returns undef
|
|
Arguments:
|
|
hostname
|
|
Returns: ip address
|
|
Globals:
|
|
cache: %::hostiphash
|
|
Error:
|
|
none
|
|
Example:
|
|
my $ip = xCAT::NetworkUtils->getipaddr($hostname);
|
|
Comments:
|
|
none
|
|
=cut
|
|
|
|
#-------------------------------------------------------------------------------
|
|
sub getipaddr()
|
|
{
|
|
my ($class, $iporhost) = @_;
|
|
|
|
my $socket6support = eval { require Socket6 };
|
|
|
|
if (($iporhost =~ /\d+\.\d+\.\d+\.\d+/) || ($iporhost =~ /:/))
|
|
{
|
|
#pass in an ip and only want an ip??
|
|
return $iporhost;
|
|
}
|
|
|
|
#cache, do not lookup DNS each time
|
|
if (defined($::hostiphash{$iporhost}) && $::hostiphash{$iporhost})
|
|
{
|
|
return $::hostiphash{$iporhost};
|
|
}
|
|
else
|
|
{
|
|
if ($socket6support) # the getaddrinfo and getnameinfo supports both IPv4 and IPv6
|
|
{
|
|
my ($family, $socket, $protocol, $ip, $name) = Socket6::getaddrinfo($iporhost,0);
|
|
if ($ip)
|
|
{
|
|
return (Socket6::getnameinfo($ip, Socket6::NI_NUMERICHOST()))[0];
|
|
}
|
|
return undef;
|
|
}
|
|
else
|
|
{
|
|
return inet_ntoa(inet_aton($iporhost))
|
|
}
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
=head3 linklocaladdr
|
|
Only for IPv6.
|
|
Takes a mac address, calculate the IPv6 link local address
|
|
Arguments:
|
|
mac address
|
|
Returns:
|
|
ipv6 link local address. returns undef if passed in a invalid mac address
|
|
Globals:
|
|
Error:
|
|
none
|
|
Example:
|
|
my $linklocaladdr = xCAT::NetworkUtils->linklocaladdr($mac);
|
|
Comments:
|
|
none
|
|
=cut
|
|
|
|
#-------------------------------------------------------------------------------
|
|
sub linklocaladdr {
|
|
my ($class, $mac) = @_;
|
|
$mac = lc($mac);
|
|
my $localprefix = "fe80";
|
|
|
|
my ($m1, $m2, $m3, $m6, $m7, $m8);
|
|
# mac address can be 00215EA376B0 or 00:21:5E:A3:76:B0
|
|
if($mac =~ /^([0-9A-Fa-f]{2}).*?([0-9A-Fa-f]{2}).*?([0-9A-Fa-f]{2}).*?([0-9A-Fa-f]{2}).*?([0-9A-Fa-f]{2}).*?([0-9A-Fa-f]{2})$/)
|
|
{
|
|
($m1, $m2, $m3, $m6, $m7, $m8) = ($1, $2, $3, $4, $5, $6);
|
|
}
|
|
else
|
|
{
|
|
#not a valid mac address
|
|
return undef;
|
|
}
|
|
my ($m4, $m5) = ("ff","fe");
|
|
|
|
my $bit = (int $m1) & 2;
|
|
if ($bit) {
|
|
$m1 = $m1 - 2;
|
|
} else {
|
|
$m1 = $m1 + 2;
|
|
}
|
|
|
|
$m1 = $m1 . $m2;
|
|
$m3 = $m3 . $m4;
|
|
$m5 = $m5 . $m6;
|
|
$m7 = $m7 . $m8;
|
|
|
|
my $laddr = join ":", $m1, $m3, $m5, $m7;
|
|
$laddr = join "::", $localprefix, $laddr;
|
|
|
|
return $laddr;
|
|
}
|
|
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
=head3 ishostinsubnet
|
|
Works for both IPv4 and IPv6.
|
|
Takes an ip address, the netmask and a subnet,
|
|
chcek if the ip address is in the subnet
|
|
Arguments:
|
|
ip address, netmask, subnet
|
|
Returns:
|
|
1 - if the ip address is in the subnet
|
|
0 - if the ip address is NOT in the subnet
|
|
Globals:
|
|
Error:
|
|
none
|
|
Example:
|
|
if(xCAT::NetworkUtils->ishostinsubnet($ip, $netmask, $subnet);
|
|
Comments:
|
|
none
|
|
=cut
|
|
|
|
#-------------------------------------------------------------------------------
|
|
sub ishostinsubnet {
|
|
my ($class, $ip, $mask, $subnet) = @_;
|
|
|
|
if ($ip =~ /\d+\.\d+\.\d+\.\d+/) {# ipv4 address
|
|
$ip =~ /([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/;
|
|
my $ipnum = ($1<<24)+($2<<16)+($3<<8)+$4;
|
|
|
|
$mask =~ /([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/;
|
|
my $masknum = ($1<<24)+($2<<16)+($3<<8)+$4;
|
|
|
|
$subnet =~ /([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/;
|
|
my $netnum = ($1<<24)+($2<<16)+($3<<8)+$4;
|
|
|
|
if (($ipnum & $masknum) == $netnum) {
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
} else { # for ipv6
|
|
if ($netipmodule) {
|
|
my $eip = Net::IP::ip_expand_address ($ip,6);
|
|
my $enet = Net::IP::ip_expand_address ($subnet,6);
|
|
my $bmask = Net::IP::ip_get_mask($mask,6);
|
|
my $bip = Net::IP::ip_iptobin($eip,6);
|
|
my $bipnet = $bip & $bmask;
|
|
my $bnet = Net::IP::ip_iptobin($enet,6);
|
|
if ($bipnet == $bnet) {
|
|
return 1;
|
|
}
|
|
} # else, can not check without Net::IP module
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
1;
|