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https://github.com/api7/lua-resty-ipmatcher
High-performance match IP address for Nginx + Lua
https://github.com/api7/lua-resty-ipmatcher
cidr-format ipv4 ipv6-address lua openresty parse
Last synced: about 1 month ago
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High-performance match IP address for Nginx + Lua
- Host: GitHub
- URL: https://github.com/api7/lua-resty-ipmatcher
- Owner: api7
- License: apache-2.0
- Created: 2019-09-08T14:46:33.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2023-06-19T05:42:04.000Z (about 1 year ago)
- Last Synced: 2024-02-14T17:32:35.941Z (5 months ago)
- Topics: cidr-format, ipv4, ipv6-address, lua, openresty, parse
- Language: Lua
- Homepage: https://www.apiseven.com/
- Size: 34.2 KB
- Stars: 112
- Watchers: 5
- Forks: 40
- Open Issues: 5
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Lists
- awesome-resty - lua-resty-ipmatcher
README
# Name
High-performance IP address matching for OpenResty Lua.
# Table of Contents
- [Name](#name)
- [Table of Contents](#table-of-contents)
- [Synopsis](#synopsis)
- [Methods](#methods)
- [ipmatcher.new](#ipmatchernew)
- [Usage](#usage)
- [Example](#example)
- [ipmatcher.new\_with\_value](#ipmatchernew_with_value)
- [Usage](#usage-1)
- [Example](#example-1)
- [ip:match](#ipmatch)
- [Usage](#usage-2)
- [Example](#example-2)
- [ip:match\_bin](#ipmatch_bin)
- [Usage](#usage-3)
- [Example](#example-3)
- [ipmatcher.parse\_ipv4](#ipmatcherparse_ipv4)
- [ipmatcher.parse\_ipv6](#ipmatcherparse_ipv6)
- [Installation](#installation)
- [From LuaRocks](#from-luarocks)
- [From Source](#from-source)
# Synopsis
```lua
location / {
content_by_lua_block {
local ipmatcher = require("resty.ipmatcher")
local ip = ipmatcher.new({
"127.0.0.1",
"192.168.0.0/16",
"::1",
"fe80::/32",
})
ngx.say(ip:match("127.0.0.1"))
ngx.say(ip:match("192.168.1.100"))
ngx.say(ip:match("::1"))
}
}
```
[Back to TOC](#table-of-contents)
# Methods
## ipmatcher.new
Creates a new hash table to store IP addresses.
### Usage
`ips` is a list of IPv4 or IPv6 IP addresses in a CIDR format (`{ip1, ip2, ip3, ...}`).
```lua
ok, err = ipmatcher.new(ips)
```
Returns `nil` and the error if it fails to create a new `ipmatcher` instance.
### Example
```lua
local ip, err = ipmatcher.new({
"127.0.0.1", "192.168.0.0/16", "::1", "fe80::/16",
})
```
[Back to TOC](#table-of-contents)
## ipmatcher.new_with_value
Creates a new hash table to store IP addresses and corresponding values.
### Usage
`ips` is a list of key-value pairs (`{[ip1] = val1, [ip2] = val2, ...}`), where each key is an IP address string (CIDR format for IPv4 and IPv6).
```lua
matcher, err = ipmatcher.new_with_value(ips)
```
Returns `nil` and the error if it fails to create a new `ipmatcher` instance.
### Example
```lua
local ip, err = ipmatcher.new_with_value({
["127.0.0.1"] = {info = "a"},
["192.168.0.0/16"] = {info = "b"},
})
local data, err = ip:match("192.168.0.1")
print(data.info) -- "b"
```
If the IP address matches multiple values, the returned value can be either one of the values:
```lua
local ip, err = ipmatcher.new_with_value({
["192.168.0.1"] = {info = "a"},
["192.168.0.0/16"] = {info = "b"},
})
local data, err = ip:match("192.168.0.1")
print(data.info) -- "a" or "b"
```
[Back to TOC](#table-of-contents)
## ip:match
Checks if an IP address exists in the specified IP list.
### Usage
`ip` is an IP address string.
```lua
ok, err = ip:match(ip)
```
Returns `true` or `value` if the specified `ip` exists in the list. Returns `false` if the `ip` does not exist in the list. And returns `false` and an error message if the IP address is invalid.
### Example
```lua
local ip, err = ipmatcher.new({
"127.0.0.1", "192.168.0.0/16", "::1", "fe80::/16",
})
local ok, err = ip:match("127.0.0.1") -- true
```
[Back to TOC](#table-of-contents)
## ip:match_bin
Checks if an IP address in binary format exists in the specified IP list.
### Usage
`bin_ip` is an IP address in binary format.
```lua
ok, err = ip:match_bin(bin_ip)
```
Returns `true` if the specified `bin_ip` exists in the list. Returns `false` if it does not exist. Returns `nil` and an error message if `bin_ip` is invalid.
### Example
```lua
local ok, err = ip:match_bin(ngx.var.binary_remote_addr)
```
[Back to TOC](#table-of-contents)
## ipmatcher.parse_ipv4
Tries to parse an IPv4 address to a host byte order FFI `uint32_t` type integer.
```lua
ipmatcher.parse_ipv4(ip)
```
Returns `false` if the IP address is invalid.
[Back to TOC](#table-of-contents)
## ipmatcher.parse_ipv6
Tries to parse an IPv6 address to a table with four host byte order FF1 `uint32_t` type integer. The IP address can be wrapped in square brackets like `[::1]`.
```lua
ipmatcher.parse_ipv6(ip)
```
Returns a `false` if the ip is not a valid IPv6 address.
[Back to TOC](#table-of-contents)
# Installation
## From LuaRocks
```shell
luarocks install lua-resty-ipmatcher
```
## From Source
```shell
make install
```
[Back to TOC](#table-of-contents)