Axel-Jacobsen/pingitall

if you could say hi to every server on the internet*, what would you say?

i want to ping the ipv4 internet

Plan

for i in 0..=255 {
    for j in 0..=255 {
        for k in 0..=255 {
            for l in 0..=255 {
                let ip_addr = format!("{}.{}.{}.{}", i, j, k, l)
                let time_to_response: Optional<Duration> = ping(ip_addr);
                match time_to_response {
                    Some(time) => {
                        // write to sqlite
                    },
                    None => {
                        // just move on
                    }
                }
            }
        }
    }
}

But that'll take a while. There are $256^4$ ip addresses, which is nearly 4.3 billion. Waiting for a response for each would take, at worst, 4.3 billion seconds (at a $1~s$ timeout), which is roughly 136 years, and at that point the internet will probably have transitioned to ipv6, so I'd have to just start all over again.

Plan v2: just like make a lot of threads, man