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#!/usr/local/cpanel/3rdparty/bin/perl # cpanel - scripts/ipcheck Copyright 2022 cPanel, L.L.C. # All rights reserved. # copyright@cpanel.net http://cpanel.net # This code is subject to the cPanel license. Unauthorized copying is prohibited use strict; use warnings; use Text::Wrap; # Perl core lib module use Cpanel::SafeRun::Errors (); use Cpanel::DIp::MainIP (); use Cpanel::NAT (); use Cpanel::Binaries (); use Cpanel::Sys::Hostname (); use Cpanel::Usage (); use Cpanel::IP::Loopback (); use Socket (); $Text::Wrap::columns = 68; sub usage { die <<'EOM'; ipcheck - Report on various error conditions relating to hostname / IP resolution ipcheck [options] Options: --help Brief help message --test Test email formatting by generating an email with random simulated IP configuration errors (NOTE: The subject and body of the email will both clearly indicate that it is only a simulation.) --verbose Even when no problems have been found, tells you so EOM } my $test_mode = 0; my $verbose = 0; Cpanel::Usage::wrap_options( { # Notice we do not need preference "require_left", because this script # takes option args *only*, so there is no need to force them to be to # the left of non-option args. If any non-option args are found, we'll # detect them and usage() out immediately below. strict => 1, # allow ONLY the opts specified in hash below remove => 1, # remove opts from cmd line after processing them # require_left => 1, }, \@ARGV, \&usage, { 'test' => \$test_mode, 'verbose' => \$verbose, } ); # ALL args to this script must be --xxx option args. If any # other args are left after we've eliminated those, we have a # problem. @ARGV && usage(); my $rightip = Cpanel::DIp::MainIP::getmainserverip(); my $hostname = Cpanel::Sys::Hostname::gethostname(); my @problems; my $wrongip; my $iaddr; if ( my $iaddr = gethostbyname($hostname) ) { my $ip = Socket::inet_ntoa($iaddr); if ( $ip ne $rightip && !Cpanel::IP::Loopback::is_loopback($ip) ) { $wrongip = $ip; push( @problems, 'resolved_to_wrong_ip_msg' ); } } else { #not found by perl builtin push( @problems, 'host_not_found_msg' ); } my $host_bin = Cpanel::Binaries::path('host'); if ( !-x $host_bin ) { push( @problems, 'unable_resolve_no_host_binary_msg' ); } else { my $dnsres = Cpanel::SafeRun::Errors::saferunallerrors( $host_bin, $hostname ); if ( !$dnsres || $dnsres =~ /Host not found/i ) { #not found by linux binary push( @problems, 'host_not_found_msg' ); } else { my ($dns_resip) = $dnsres =~ /(\d+\.\d+\.\d+\.\d+)/; if ( !$dns_resip ) { #not found by linux binary push( @problems, 'host_not_found_msg' ); } elsif ( Cpanel::NAT::get_local_ip($dns_resip) ne $rightip && !Cpanel::IP::Loopback::is_loopback($dns_resip) ) { # The check for localhost is for symmetry with first method, above # (gethostbyname), where we likewise perform these two tests. push( @problems, 'resolved_to_wrong_ip_msg' ); $wrongip = $dns_resip; } } } if (@problems) { require Cpanel::iContact::Class::Check::IP; print "[ipcheck] sent email! Errors found\n"; require Cpanel::Notify; Cpanel::Notify::notification_class( 'class' => 'Check::IP', 'application' => 'Check::IP', 'constructor_args' => [ 'origin' => $hostname, 'problems' => \@problems, 'right_ip' => $rightip, 'wrong_ip' => $wrongip ] ); } else { if ($verbose) { print "$0: OK: No IP-related problems have been found.\n"; } }
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