GoOn : programmer

[–] [email protected] 313 points 2 years ago (10 children)

Ok. This covers every ipv6 and ipv4 address.

"^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:)))(%.+)?\s*$"

[–] [email protected] 106 points 2 years ago

Lord have mercy

[–] [email protected] 83 points 2 years ago* (last edited 2 years ago) (1 children)

Please don't. Use regex to find something that looks like an IP then build a real parser. This is madness, its's extremely hard to read and a mistake is almost impossible to spot. Not to mention that it's slow.

Just parse [0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3} using regex (for v4) and then have some code check that all the octets are valid (and store the IP as a u32).

[–] [email protected] 11 points 2 years ago (8 children)

And dupe check. 0.0.0.0 and 000.000.000.000 may both be valid, but they resolve the same

load more comments (8 replies)

[–] [email protected] 51 points 2 years ago (5 children)

IPv6 was a mistake. We should have just added an addition octet

[–] [email protected] 75 points 2 years ago (5 children)

That would allow for like, 2 trillion devices? Feels like a bandaid, my dude. Next you’re gonna suggest a giant ice cube in the ocean once a year to stop global warming.

[–] [email protected] 13 points 2 years ago (1 children)

So add two more octets:

Moat companies will still just use something like 10.0.13.37.0.1

[–] [email protected] 11 points 2 years ago (5 children)

IPv6 is not made with internal networks in mind lol

load more comments (5 replies)

[–] [email protected] 9 points 2 years ago (2 children)

And nuke the hurricanes

load more comments (2 replies)

load more comments (3 replies)

[–] [email protected] 17 points 2 years ago (2 children)

Oh yeah, great, let's change the fundamental protocol on which all the networks in the world are based. Now two third of the devices in the world crashed because you tried to ping 192.168.0.0.1

[–] [email protected] 12 points 2 years ago

that WOULD be quite funny for the first second or 2....

load more comments (1 replies)

load more comments (3 replies)

[–] [email protected] 37 points 2 years ago (1 children)

https://imgs.xkcd.com/comics/perl_problems.png

[–] [email protected] 20 points 2 years ago* (last edited 2 years ago) (5 children)

Made that joke in an interview once.

They didn't think it was funny. They truly thought Regex was the solution to, but never the cause of, all problems.

They wanted to make a Regex to verify every single address in the world. Dodged a bullet

load more comments (5 replies)

[–] [email protected] 31 points 2 years ago

It's always a treat to debug a regex of that size.

[–] [email protected] 29 points 2 years ago

I knew there would be someone with the regex.

[–] [email protected] 18 points 2 years ago* (last edited 2 years ago)

You're more of a perl programmer than network engineer :P

load more comments (3 replies)

[–] [email protected] 177 points 2 years ago (3 children)

0.0.0.0/0 0::0/0

You didn't specify it couldn't be in CIDR block notation...

[–] [email protected] 27 points 2 years ago

::/0

load more comments (2 replies)

[–] [email protected] 91 points 2 years ago (4 children)

0.0.0.0 /0 ::/0

SUCK MY DICK, GRU!

load more comments (4 replies)

[–] [email protected] 81 points 2 years ago* (last edited 2 years ago) (1 children)

:00 - :ff

Edit: Just learnt this can be also noted as:

:: - ::f

load more comments (1 replies)

[–] [email protected] 68 points 2 years ago (2 children)

0.0.0.0/0

[–] [email protected] 21 points 2 years ago (1 children)

Better hope the goon hasn't heard of IPv6 either, or you're toast

[–] [email protected] 21 points 2 years ago

::/0

load more comments (1 replies)

[–] [email protected] 65 points 2 years ago* (last edited 2 years ago)

This is gonna take a while...

0.0.0.0

0.0.0.1

0.0.0.2

0.0.0.3

...

[–] [email protected] 42 points 2 years ago* (last edited 2 years ago) (2 children)

0.0.0.0/0

::/0

load more comments (2 replies)

[–] [email protected] 40 points 2 years ago

0.0.0.0/0

[+] [email protected] 27 points 2 years ago* (last edited 1 year ago) (2 children)

[deleted]

[–] [email protected] 15 points 2 years ago* (last edited 2 years ago) (1 children)

This excludes all the ipv4 ips that have a 0 in the 2nd, 3rd, and 4th octets. Sorry but we're going to have to revoke your Network Engineering credentials.

load more comments (1 replies)

[–] [email protected] 10 points 2 years ago (2 children)

Not to nitpick, but an IPv6 address is represented as eight groups of four hexadecimal digits separated by :. Like 2001:0db8:3333:4444:5555:6666:7777:8888.

load more comments (2 replies)

[–] [email protected] 27 points 2 years ago* (last edited 2 years ago) (3 children)

This reminds me of something I saw online maybe 20 years ago now. Someone created a torrent with a name like "every IP address ever (hacking tool)" and uploaded it to Suprnova, which ended up having thousands of people seeding it. It was just a text file with every IPv4 from 0.0.0.0 to 255.255.255.255 😂

load more comments (3 replies)

[–] [email protected] 23 points 2 years ago

127.0.0.1, I'm an introvert

[–] [email protected] 22 points 2 years ago (1 children)

one of them has a 7 I’m pretty sure

load more comments (1 replies)

[–] [email protected] 22 points 2 years ago

[–] [email protected] 21 points 2 years ago

0.0.0.0/0

[–] [email protected] 20 points 2 years ago (1 children)

/32

[–] [email protected] 22 points 2 years ago

That's only 1 ip (single host)

[–] [email protected] 17 points 2 years ago

I mean if I name them do I have to own the domain or…

[–] [email protected] 16 points 2 years ago (1 children)

1 and 0. Some assembly required.

load more comments (1 replies)

[–] [email protected] 15 points 2 years ago

0/0

[–] [email protected] 15 points 2 years ago* (last edited 2 years ago)

My PC's is now Bob, My router's Billy...

[–] [email protected] 12 points 2 years ago (4 children)

I'll start.

0.0.0.1: Sophie

Your turn.

load more comments (4 replies)

[–] [email protected] 12 points 2 years ago* (last edited 2 years ago)

0.0.0.0/0

::

[–] [email protected] 11 points 2 years ago

ipv6

[–] [email protected] 10 points 2 years ago (1 children)

Name every protocol

[–] [email protected] 10 points 2 years ago (1 children)

TCP
UDP

[–] [email protected] 13 points 2 years ago (1 children)

UDP

I'd love to tell you a joke about UDP but I'll never know if you get it.

load more comments (1 replies)

[–] [email protected] 10 points 2 years ago (1 children)

127.0.0.1

load more comments (1 replies)

Programmer Humor

Rules