#!/bin/sh

OPENNIC='servers.opennic.org'

get_html_opennic() {
	printf '%s\n' "Getting IPv4 addresses from $OPENNIC" >&2
	openssl s_client -crlf -quiet -connect "$OPENNIC":443 -servername "$OPENNIC" 2>/dev/null <<- EOF
		GET / HTTP/1.1
		Host: ${OPENNIC}
		Cache-Control: max-age=0
		sec-ch-ua: "Chromium";v="95", ";Not A Brand";v="99"
		sec-ch-ua-mobile: ?0
		sec-ch-ua-platform: "Linux"
		Upgrade-Insecure-Requests: 1
		User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36
		Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
		Sec-Fetch-Site: cross-site
		Sec-Fetch-Mode: navigate
		Sec-Fetch-User: ?1
		Sec-Fetch-Dest: document
		Referer: https://wiki.ircnow.org/
		Accept-Language: en-US,en;q=0.9
		Connection: keep-alive

	EOF
}

get_html_opennic |
grep -Eo 'mono ipv4[^>]*>([0-9]+\.){3}[0-9]+' |
sed -e 's/.*>//' -e 's/.*/forward-addr: &/'