+function isSignupAllowedForCurrentIP (ip: string) {
+ const addr = ipaddr.parse(ip)
+ let excludeList = [ 'blacklist' ]
+ let matched = ''
+
+ // if there is a valid, non-empty whitelist, we exclude all unknown adresses too
+ if (CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr(cidr)).length > 0) {
+ excludeList.push('unknown')
+ }
+
+ if (addr.kind() === 'ipv4') {
+ const addrV4 = ipaddr.IPv4.parse(ip)
+ const rangeList = {
+ whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v4(cidr))
+ .map(cidr => ipaddr.IPv4.parseCIDR(cidr)),
+ blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v4(cidr))
+ .map(cidr => ipaddr.IPv4.parseCIDR(cidr))
+ }
+ matched = ipaddr.subnetMatch(addrV4, rangeList, 'unknown')
+ } else if (addr.kind() === 'ipv6') {
+ const addrV6 = ipaddr.IPv6.parse(ip)
+ const rangeList = {
+ whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v6(cidr))
+ .map(cidr => ipaddr.IPv6.parseCIDR(cidr)),
+ blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v6(cidr))
+ .map(cidr => ipaddr.IPv6.parseCIDR(cidr))
+ }
+ matched = ipaddr.subnetMatch(addrV6, rangeList, 'unknown')
+ }
+
+ return !excludeList.includes(matched)
+}
+