append data $response
	}

	return [dict create extensions $extensions data $data]
}

proc ::nano::network::_localIP {version} {
	set now [clock seconds]

	if {[info exists ::nano::network::_localIP($version)]} {
		set cached $::nano::network::_localIP($version)
		set lastCheckTime [dict get $cached lastCheckTime]
		if {($lastCheckTime + 300) >= $now} {
			if {[dict exists $cached value]} {
				return [dict get $cached value]
			} else {
				return -code error "Unable to resolve address for IP $version (cached)"
			}
		}
	}

	package require http 2


	switch -exact -- $version {
		v4 {
			set urls {
				http://api.ipify.org/
				http://ipv4.rkeene.org/whatismyip
				http://ifconfig.co/
			}

			set localIPPrefix "::ffff:"
		}
		v6 {
			set urls {
				http://ipv6.rkeene.org/whatismyip
				http://ifconfig.co/
			}
			set urls {
				http://api.ipify.org/
			}

			set localIPPrefix ""
		}
		default {
			return -code error "version must be \"v4\" or \"v6\""
		}
	}

	# Cache an error in advance
	set ::nano::network::_localIP($version) [dict create lastCheckTime $now]

	foreach url $urls {
		set oldAgent [http::config -useragent]
		http::config -useragent "curl/0.0"
		catch {
			set token [http::geturl $url -timeout 30000]
			set ncode [http::ncode $token]
			set data [http::data $token]
		} error
		http::config -useragent $oldAgent

		if {![info exists data]} {
			set ncode -1
			set data $error
		}

		if {[info exists token]} {
			http::cleanup $token
		}

		if {$ncode ne "200"} {

			continue
		}

		set localIP $data
		set localIP [string trim $localIP]
		set localIPVersion ""
		catch {
			set localIPVersion "v[::ip::version $localIP]"
		}

		if {$localIPVersion != $version} {
			unset localIP

			continue
		}

		break
	}

	if {![info exists localIP]} {
		return -code error "Unable to lookup local IP $version"
	}

	set localIP "${localIPPrefix}${localIP}"

	# Cache the returned value
	set ::nano::network::_localIP($version) [dict create lastCheckTime $now value $localIP]

	return $localIP
}

proc ::nano::protocol::create::keepalive {ipPortDictList args} {
	set retval ""

	# Allow creating an empty keepalive
	array set argInfo {