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Current File : //scripts/mainipcheck

#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/mainipcheck                     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;

package scripts::mainipcheck;

use Cpanel::IP::LocalCheck   ();
use Cpanel::IP::Loopback     ();
use Cpanel::Linux::RtNetlink ();
use Cpanel::LoadModule       ();
use Cpanel::Logger           ();
use Cpanel::NAT::Object      ();
use Cpanel::SafeRun::Object  ();
use Cpanel::FileUtils::Write ();
use Cpanel::LoadFile         ();
use Cpanel::DIp::LicensedIP  ();
use Cpanel::Exception        ();
use Socket                   ();

use Try::Tiny;

use Getopt::Long qw(GetOptionsFromArray);

our $MAINIP_FILE = '/var/cpanel/mainip';

exit( __PACKAGE__->script( \@ARGV ) ) unless caller();

sub script {
    my ( $class, $argv ) = @_;

    my $remote_check;
    GetOptionsFromArray(
        $argv,
        'remote-check' => \$remote_check,
    ) if defined $argv and ref $argv eq 'ARRAY';

    my $logger = Cpanel::Logger->new();

    my $mainip_file_contents = eval { Cpanel::LoadFile::loadfile($MAINIP_FILE) // '' };
    my $mainip               = $mainip_file_contents =~ s/\s+//gr;
    my $myip_url             = Cpanel::DIp::LicensedIP::myip_url();
    my $cpIP                 = Cpanel::DIp::LicensedIP::get_license_ip($myip_url);
    my $default_route_ip;
    my $update_mainip      = $mainip ne $mainip_file_contents;    # Clean up formatting of the file if true
    my $mainip_file_exists = -e $MAINIP_FILE;                     # No sense in stat-ing the file twice like we used to in certain scenarioes

    # Needed for NAT awareness, is NO-OP on non-NAT to these values (thus local and public IP values would be the same on non-nat systems).
    my $NAT_obj      = Cpanel::NAT::Object->new();
    my $NAT_local_ip = $NAT_obj->get_local_ip($cpIP);

    if ($remote_check) {
        print "$cpIP\n";
        return 0;
    }

    eval { $default_route_ip = get_ip_from_netlink() || get_ip_from_default_route(); };
    if ( my $error_message = $@ ) {
        chomp $error_message;
        $logger->warn("Encountered an error while determining the main IP from the default route: $error_message");
        ($mainip_file_exists) ? die "/var/cpanel/mainip exists. Bailing out..." : $logger->info("Proceeding with main IP check assuming that the IP address from $myip_url is the main IP address.");
        $default_route_ip = $mainip;    # XXX Should we keep going even here? I'm not sure.
    }
    my $NAT_public_ip = $NAT_obj->get_public_ip($default_route_ip);

    my $canonical_main_ip = $default_route_ip || $NAT_local_ip;
    if ( !$mainip_file_exists ) {
        $update_mainip = 1;             # I'm somewhat curious as to whether we'd wanna update SPF records here too, honestly.
    }
    elsif ( $canonical_main_ip ne $mainip ) {
        $update_mainip = 1;
        $logger->info("The Server's main IP address has changed from $mainip to $canonical_main_ip.");

        # At one point, the below condition turned $default_route_ip into $cpIP, causing logger warns to actually get suppressed
        # when they would normally be spuriously reported for NATted systems.
        # This is because all the check for the logger warn below used to be if $default_route_ip ne $cpIP.
        # This would never be true when we had to update the mainip previously.
        if ( !Cpanel::IP::LocalCheck::ip_is_on_local_server($cpIP) ) {
            $logger->warn("$cpIP is not bound to an interface on the system! Please verify your network configuration.");

            # This can trigger pretty trivially on NAT setups if your cpnat configuration is not built or in fact insane.
            # Just make /var/cpanel/cpnat contain non-ip strings as if they were a key=>value nat IP pair separated
            # by spaces if you want to see this in action.
        }

        # Ensure the license system has what it needs? Not sure how it gets the updated mainip or if it even needs it?
        _reprovision_license_authn();

        require Cpanel::ServerTasks;

        # Update SPF records, as we've changed to a new mainip
        Cpanel::ServerTasks::schedule_task( ['SPFTasks'], 5, 'update_all_users_spf_records' );
        $logger->info("Scheduled SPF record update");
    }

    if ($update_mainip) {
        Cpanel::FileUtils::Write::overwrite( $MAINIP_FILE, $canonical_main_ip, 0644 );
    }

    if ( !$NAT_obj->enabled && $default_route_ip ne $cpIP ) {
        $logger->warn("$myip_url detects system IP as $cpIP and system local IP detected as $default_route_ip. Please verify your network configuration.");
    }
    elsif ( $NAT_obj->enabled && $NAT_public_ip ne $cpIP && $NAT_local_ip ne $default_route_ip ) {

        # Entertaingly enough, in this instance, $NAT_local_ip always equals $cpIP and vice versa. Conveniently enough, it also catches all invalid NAT configs.
        $logger->warn("$myip_url detects a system IP address of $cpIP and system local IP address of $default_route_ip.");
        $logger->warn("This looks like a NAT setup, but these IP addresses do not correspond to values listed in /var/cpanel/cpnat.");
        $logger->info("The system will now rebuild your cpnat configuration to ensure system sanity.");
        _system('/usr/local/cpanel/scripts/build_cpnat');
    }

    return 0;
}

# For mocking in tests -- don't remove the 'uncoverable' comments below, as this impacts Devel::Cover reporting.
sub _system {

    # uncoverable subroutine
    return system @_;    # uncoverable statement
}

# Pick a testing IP and see how the kernel proposes routing it, then look up and return the source address which would be used.
sub get_ip_from_netlink {
    my $TEST_IP   = '208.74.123.2';    # TODO: Better way of picking an IP with high probability of not being routed specially?
    my $result_ip = '';

    try {
        my $routes_ar = Cpanel::Linux::RtNetlink::get_route_to( 'AF_INET', $TEST_IP );
        foreach my $route_info_hr (@$routes_ar) {
            if ( defined $route_info_hr->{'rta_dst'} && $route_info_hr->{'rta_dst'} eq $TEST_IP ) {
                $result_ip = $route_info_hr->{'rta_prefsrc'};
                last;
            }
        }
    }
    catch {
        Cpanel::Logger->new()->warn( 'Failed to retrieve IP via Netlink: ' . Cpanel::Exception::get_string_no_id($_) . "\nFalling back to reading /proc/net/route." );
    };

    return $result_ip;
}

# Get interface associated with default route and use socket() to get IP
sub get_ip_from_default_route {
    my $proc_route_path = shift || '/proc/net/route';    # For unit testing, mostly
    my %interfaces;

    if ( open my $proc_fh, '<', $proc_route_path ) {
        while ( my $line = readline $proc_fh ) {
            chomp $line;
            if ( $line =~ m/^(.+?)\s*0{8}\s.*?(\d+)\s+0{8}\s*(?:\d+\s*){3}$/ ) {
                my ( $interface, $metric ) = ( $1, $2 );
                push @{ $interfaces{$metric} }, $interface;
            }
        }
        close($proc_fh);
    }
    else {
        die("Unable to open $proc_route_path: $!");
    }

    my $lowest_metric = ( sort keys %interfaces )[0];
    my $interface     = $interfaces{$lowest_metric}[0];
    my $ip            = get_ip_from_interface($interface);

    # VPS issues
    if ( Cpanel::IP::Loopback::is_loopback($ip) && $interface =~ /^venet0?$/ ) {
        return get_ip_from_interface('venet0:0');
    }

    return $ip;
}

sub get_ip_from_interface {
    my $interface   = shift;
    my $SIOCGIFADDR = 0x8915;
    my $proto       = getprotobyname('ip');
    socket( my $socket_fh, &Socket::PF_INET, &Socket::SOCK_DGRAM, $proto ) or die("Socket error: $!");

    # struct ifreq is 16 bytes of name, null-padded, followed by 16 bytes of answer.
    my $ifreq = pack( 'a32', $interface );
    ioctl( $socket_fh, $SIOCGIFADDR, $ifreq ) or die("Error in ioctl: $!");
    my ( $if,   $sin )  = unpack( 'a16 a16', $ifreq );
    my ( $port, $addr ) = Socket::sockaddr_in($sin);
    my $ip;
    foreach my $family ( &Socket::AF_INET, &Socket::AF_INET6 ) {
        last if $ip;

        # Generally we'll favor ipv4 addresses over ipv6, but we should use the v6 if it is the only one available.
        $ip = Socket::inet_ntop( $family, $addr );
    }
    return $ip;
}

sub _reprovision_license_authn {

    Cpanel::LoadModule::load_perl_module('Cpanel::Market');
    Cpanel::Market::set_cpstore_is_in_sync_flag(0);
    #
    # This will cause the system to get new LicenseAuthn
    # credentials so we can connect to various cPanel systems
    # that require license-based authentication.
    #
    my $run = Cpanel::SafeRun::Object->new( 'program' => '/usr/local/cpanel/cpkeyclt' );
    warn $run->autopsy() if $run->CHILD_ERROR;

    #
    #  cpkeyclt will auto re-provision on the second run
    #  if the id changes
    #
    $run = Cpanel::SafeRun::Object->new(
        'program' => '/usr/local/cpanel/scripts/try-later',
        'args'    => [
            '--action',      '/usr/local/cpanel/cpkeyclt --quiet',
            '--check',       '/bin/sh -c exit 1',
            '--delay',       11,                                     # We only allow updates every 10 minutes so wait 11
            '--max-retries', 1,
            '--skip-first'
        ]
    );
    warn $run->autopsy() if $run->CHILD_ERROR;

    #
    #  If they changed the ip for the license in manage2 they keep the
    #  same liscid so we need to check after the license update has
    #  happened the second time
    #
    $run = Cpanel::SafeRun::Object->new(
        'program' => '/usr/local/cpanel/scripts/try-later',
        'args'    => [
            '--action',      '/usr/local/cpanel/bin/check_cpstore_in_sync_with_local_storage',
            '--check',       '/bin/sh -c exit 1',
            '--delay',       15,                                                                 # Must happen after the second license update
            '--max-retries', 1,
            '--skip-first'
        ]
    );
    warn $run->autopsy() if $run->CHILD_ERROR;

    return 1;

}

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  • The Power of Storytelling
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  • About
  • What We Do
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  • Case Studies
    • The BBC
    • CBS News
    • New York Times Television
    • Spectrum News
    • The Newark Star-Ledger
    • The United Nations
    • McGraw/Hill
    • Oyster Yachts
    • Scottish Environmental Protection Agency
  • The Power of Storytelling
  • Why iPhones?
  • Michael on Media
  • Books
  • Contact

RE-INVENTING THE TELEVISION NEWS BUSINESS*

A revolution in video storytelling

Creating entirely new & cost-effective production methods

From the world leaders in video production training and the creators of Character Driven Storytelling™

*and every other business that uses video

WHAT WE DO

Over the past 35 years, we have designed, built or restructured some of the most powerful news and journalism companies in the world.

We replace the traditional TV news ‘crew’ with one highly trained journalist, working alone with nothing but an iPhone.

No more TV news ‘crews’, no editors and no field producers.

This is television news done the way newspaper journalism is done – one reporter with their electronic pad and pencil.

In doing this, we can cut the cost of production by as much as 75% while increasing ratings and audience engagement.

In the place of conventional TV news ‘packages’ – ie, reporter stand up, interview, b-roll, man on the street, we marry great journalism with Netflix and Hollywood storytelling.

It’s a combination that works.

We have taken most of our clients to #1 in their respective markets.

And it’s not just for news. Any company, any profit, any NGO and anyone else who is online needs to tell their story in compelling yet cost-effective video. We can teach you to do that. Either in person or virtually.

EXAMPLES OF WHAT WE CAN TEACH YOUR STAFF TO PRODUCE

ITAY HOD

Itay Hod, MMJ with KPIX/CBS in San Francisco, took the 5-Day Intensive Video Storytelling Bootcamp in 2018.

Because he works alone, with only an iPhone, he was able to embed himself with a homeless family.

Here’s the story he produced in a one-day turn.

KIET DO

Kiet Do, an MMJ with KPIX/CBS in San Francisco, took the 5-Day Intensive Video Storytelling Bootcamp in 2021.

Here is a story he produced, all on his own, with only an iPhone and in a one-day turn.

TAYLOR SCHAUB

Taylor Schaub, an MMJ with Spectrum News 1 in LA, took the 5-Day Intensive Video Storytelling Bootcamp in 2023.

Here is a story he turned in only one day, using only an iPhone. It was the first video story he ever did and it was nominated for an Emmy.

THE BOOTCAMP

How do we convert stations and whole networks to working in this way?

Since 1988, we have run intensive 5-Day Video Storytelling Bootcamps

We have done these all over the world.

These are hands-on bootcamps, and participants learn an entirely new way of creating TV news stories.

-We shoot at a 3:1 ratio or lower, so turnaround times are fast.

-We go directly from camera to timelilne and edit – no written scripts.  We work in the medium of pictures and sound.

-We are entirely character-driven.

-We are driven by pictures and real events.

-We are focused almost entirely on ’the viewer experience’.

Since 1988, more than 70,000 journalists around the world have taken our bootcamps, either in person on virtualy.

Case Studies

CBS Case Study Logos
CBS News

We have started to work with CBS News, bringing our ideas of character-driven storytelling to one of the most successful and biggest networks in the United States. Since beginning to work with them ratings have climbed and more importantly, audience engagement is through the ceiling.

Learn More
NYT Case Study Logos
New York Times Television

We started New York Times Television in 1990 and it was the first paper to be brought into the world of TV. It quickly became one of the most successful non-fiction production companies in the United States. The series and documentaries we produced won many awards including multiple Emmys.

Learn More
BBC Case Study Logos
The BBC

We have been working with the BBC since the year 2000 helping to convert their national news network to our visual storytelling technique. Most recently we have trained teams from their sports, documentaries, and comedy divisions to make character-driven stories using only smartphones.

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Spectrum Case Study Logos
Spectrum News

For the past five years we have worked with Spectrum News to introduce and train their journalists on visual, character driven storytelling using smartphones helping to create a different kind of local news for their network of 24-Hour News Stations across the United States.

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UN Case Study Logos
The United Nations

In 2006, we were approached by the United Nations. Rather than rely on news outlets, it would be much easier to train the field operatives to produce their own stories. We spent two years working with the UN, training more than 100 of their staff in bootcamps in Geneva and Nairobi.

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Star Ledger Case Study Logos
The Newark Star-Ledger

We trained 50 print reporters at the paper to shoot and tell their own stories, in conjunction with their print work. We built a TV newsroom in their existing print newsroom – you could not ask for a better set and they began to live stream their stories in conjunction with their print work.

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Mcgraw Hill

We spent two years with McGraw Hill, training more than 150 of their staffers, making them completely video literate. McGraw/Hill media properties we transit included Business Week, Aviation Week, (what was the name of the architecture magazine), and JD Power and Associates.

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Voice of America

In 1990, we were approached by The Voice of America, the official broadcasting agency for the United States Government. When we met with VOA, they were only a short wave radio broadcaster, but working with them, we took them into television, launching VOA-TV.

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Oyster Case Study Logos
Oyster Yachts

British based Oyster Yachts makes some of the finest yachts in the world. Like every other company, they had to find a way to feed the never-ending video demands of social media – sites like Instagram and TikTok. We trained the Oyster staff to tell their own stories, using only iPhones.

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Scottish Environmental Protection Agency

We were approached by SEPA, the Scottish Environmental Protection Agency because they had to continually find a way to ‘feed the media beast’. The result was that SEPA was able to tell their own stories, whenever they wanted, and at almost no additional cost.

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Image 11-11-22 at 6.25 PM

Michael on Media

Michael Rosenblum has been writing about the media since 1988. His work and ideas have appeared in The Guardian, The Huffington Post, Ilkeston Life and many other publications.

He has been blogging regularly for the past 35 years on this subject. Having taught media studies at Columbia University, NYU and now the University of Oxford, he is considered an expert on this subject.

Continue reading this post or look back at previous posts.

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