nft

go-nft (WIP)

Inspired by github.com/google/nftables, this is a higher-level package for interacting with nftables in pure Go.

This repository also includes a lower-level package, nftnl, for working with netfilter netlink messages directly, giving more control over the details of the communication with the kernel without abstracting them away.

Note: This library is under development. The API might change as I tinker with the design. 🚧

Installation

go get github.com/nickgarlis/go-nft

Example Usage

package main

import (
	"github.com/nickgarlis/go-nft"
)

func main() {
	conn, err := nft.Open(&nft.Config{})
	if err != nil {
		panic(err)
	}
  defer conn.Close()

  batch := nft.NewBatch()

	tableId, err := batch.AddTable(&nft.Table{
    Family: nft.TableFamilyINet,
    Name:   "my-table",
  })
  if err != nil {
    panic(err)
  }

  chainId, err := batch.AddChain(&nft.Chain{
    TableID: tableId,
    Name:    "my-chain",
    Type:    nft.ChainTypeFilter,
    Hook:    nft.ChainHookInput,
    Priority: 0,
    Policy:  nft.ChainPolicyAccept,
  })
  if err != nil {
    panic(err)
  }

  _, err = batch.AddRule(&nft.Rule{
    TableID: tableId,
    ChainID: chainId,
    SrcIPv4: &nft.IPMatch{
      Prefix: netip.MustParsePrefix("10.0.0.0/24"),
    },
    Action: &nft.RuleAction{
      Verdict: nft.VerdictCodeAccept,
    }
  })
	if err != nil {
		panic(err)
	}

  err := conn.SendBatch(batch)
  if err != nil {
    panic(err)
  }
}

License

This project is licensed under the Apache-2.0 License. See the LICENSE file for details.