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70 lines
1.4 KiB
70 lines
1.4 KiB
2 years ago
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# @leichtgewicht/ip-codec
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Small package to encode or decode IP addresses from buffers to strings.
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Supports IPV4 and IPV6.
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## Usage
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The basics are straigthforward
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```js
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import { encode, decode, sizeOf, familyOf } from '@leichtgewicht/ip-codec'
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const uint8Array = encode("127.0.0.1")
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const str = decode(uint8Array)
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try {
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switch sizeOf(str) {
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case 4: // IPv4
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case 16: // IPv6
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}
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switch familyOf(str) {
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case: 1: // IPv4
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case: 2: // IPv6
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}
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} catch (err) {
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// Invalid IP
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}
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```
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By default the library will work with Uint8Array's but you can bring your own buffer:
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```js
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const buf = Buffer.alloc(4)
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encode('127.0.0.1', buf)
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```
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It is also possible to de-encode at a location inside a given buffer
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```js
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const buf = Buffer.alloc(10)
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encode('127.0.0.1', buf, 4)
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```
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Allocation of a buffer may be difficult if you don't know what type the buffer:
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you can pass in a generator to allocate it for you:
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```js
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encode('127.0.0.1', Buffer.alloc)
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```
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You can also de/encode ipv4 or ipv6 specifically:
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```js
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import { v4, v6 } from '@leichtgewicht/ip-codec'
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v4.decode(v4.encode('127.0.0.1'))
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v6.decode(v6.encode('::'))
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```
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## History
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The code in this package was originally extracted from [node-ip](https://github.com/indutny/node-ip) and since improved.
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Notable changes are the removal of the `Buffer` dependency and better support for detection of
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formats and allocation of buffers.
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## License
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[MIT](./LICENSE)
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