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https://github.com/hanzoai/visor.git
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Parth SarthiandgVisor bot
c490b0f43c
The masq op updates the packet's source IP address to the primary IP address of the router's outgoing interface. - Added support masq op. - Updated Dockerfile to include `nc` and `ip tools`. - Fix setting reg in nft_nat.go as well. PiperOrigin-RevId: 951260153
81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
// Copyright 2025 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package nftables
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import (
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"fmt"
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"os/exec"
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)
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// createDropAllTable creates a table, chain, and rule that drops all packets
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// for the given family.
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func createDropAllTable(ipv6 bool, tabName string) error {
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family := "ip"
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if ipv6 {
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family = "ip6"
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}
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tableArgs := []string{family, tabName}
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chainArgs := []string{family, tabName, "input", "{", "type", "filter", "hook", "input", "priority", "0", ";", "}"}
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ruleArgs := []string{family, tabName, "input", "drop"}
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if err := tableCmd("add", tableArgs); err != nil {
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return err
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}
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if err := chainCmd("add", chainArgs); err != nil {
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return err
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}
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return ruleCmd("add", ruleArgs)
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}
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func nftCmdOut(args []string) (string, error) {
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binary := "nft"
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cmd := exec.Command(binary, args...)
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o, err := cmd.CombinedOutput()
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out := string(o)
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if err != nil {
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return out, fmt.Errorf("error running nft with args %v\nerror: %v\noutput: %s", args, err, out)
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}
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return out, err
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}
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func nftCmd(args []string) error {
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if _, err := nftCmdOut(args); err != nil {
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return err
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}
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return nil
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}
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func tableCmd(cmd string, args []string) error {
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return nftCmd(append([]string{cmd, "table"}, args...))
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}
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func chainCmd(cmd string, args []string) error {
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return nftCmd(append([]string{cmd, "chain"}, args...))
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}
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func ruleCmd(cmd string, args []string) error {
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return nftCmd(append([]string{cmd, "rule"}, args...))
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}
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func runCmd(name string, args ...string) error {
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cmd := exec.Command(name, args...)
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if out, err := cmd.CombinedOutput(); err != nil {
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return fmt.Errorf("cmd %s %v failed: %v, output: %s", name, args, err, string(out))
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}
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return nil
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}
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