| -- |
| -- Licensed to the Apache Software Foundation (ASF) under one or more |
| -- contributor license agreements. See the NOTICE file distributed with |
| -- this work for additional information regarding copyright ownership. |
| -- The ASF licenses this file to You under the Apache License, Version 2.0 |
| -- (the "License"); you may not use this file except in compliance with |
| -- the License. You may obtain a copy of the License at |
| -- |
| -- http://www.apache.org/licenses/LICENSE-2.0 |
| -- |
| -- Unless required by applicable law or agreed to in writing, software |
| -- distributed under the License is distributed on an "AS IS" BASIS, |
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| -- See the License for the specific language governing permissions and |
| -- limitations under the License. |
| -- |
| |
| --- IP match and verify module. |
| -- |
| -- @module core.ip |
| |
| local json = require("apisix.core.json") |
| local log = require("apisix.core.log") |
| local ipmatcher = require("resty.ipmatcher") |
| local str_sub = string.sub |
| local str_find = require("apisix.core.string").find |
| local tonumber = tonumber |
| |
| |
| local _M = {} |
| |
| |
| function _M.create_ip_matcher(ip_list) |
| local ip, err = ipmatcher.new(ip_list) |
| if not ip then |
| log.error("failed to create ip matcher: ", err, |
| " ip list: ", json.delay_encode(ip_list)) |
| return nil |
| end |
| |
| return ip |
| end |
| |
| --- |
| -- Verify that the given ip is a valid ip or cidr. |
| -- |
| -- @function core.ip.validate_cidr_or_ip |
| -- @tparam string ip IP or cidr. |
| -- @treturn boolean True if the given ip is a valid ip or cidr, false otherwise. |
| -- @usage |
| -- local ip1 = core.ip.validate_cidr_or_ip("127.0.0.1") -- true |
| -- local cidr = core.ip.validate_cidr_or_ip("113.74.26.106/24") -- true |
| -- local ip2 = core.ip.validate_cidr_or_ip("113.74.26.666") -- false |
| function _M.validate_cidr_or_ip(ip) |
| local mask = 0 |
| local sep_pos = str_find(ip, "/") |
| if sep_pos then |
| mask = str_sub(ip, sep_pos + 1) |
| mask = tonumber(mask) |
| if mask < 0 or mask > 128 then |
| return false |
| end |
| ip = str_sub(ip, 1, sep_pos - 1) |
| end |
| |
| if ipmatcher.parse_ipv4(ip) then |
| if mask < 0 or mask > 32 then |
| return false |
| end |
| return true |
| end |
| |
| if mask < 0 or mask > 128 then |
| return false |
| end |
| return ipmatcher.parse_ipv6(ip) |
| end |
| |
| |
| return _M |