Merge pull request #2940 from giuseppe/drop-firewall

networking: use firewall plugin

5 files changed, 0 insertions, 814 deletions

diff --git a/vendor/github.com/coreos/go-iptables/LICENSE b/vendor/github.com/coreos/go-iptables/LICENSE
deleted file mode 100644
index 37ec93a14..000000000
--- a/vendor/github.com/coreos/go-iptables/LICENSE
+++ /dev/null
@@ -1,191 +0,0 @@
-Apache License
-Version 2.0, January 2004
-http://www.apache.org/licenses/
-
-TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-1. Definitions.
-
-"License" shall mean the terms and conditions for use, reproduction, and
-distribution as defined by Sections 1 through 9 of this document.
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-"Work" shall mean the work of authorship, whether in Source or Object form, made
-available under the License, as indicated by a copyright notice that is included
-in or attached to the work (an example is provided in the Appendix below).
-
-"Derivative Works" shall mean any work, whether in Source or Object form, that
-is based on (or derived from) the Work and for which the editorial revisions,
-annotations, elaborations, or other modifications represent, as a whole, an
-original work of authorship. For the purposes of this License, Derivative Works
-shall not include works that remain separable from, or merely link (or bind by
-name) to the interfaces of, the Work and Derivative Works thereof.
-
-"Contribution" shall mean any work of authorship, including the original version
-of the Work and any modifications or additions to that Work or Derivative Works
-thereof, that is intentionally submitted to Licensor for inclusion in the Work
-by the copyright owner or by an individual or Legal Entity authorized to submit
-on behalf of the copyright owner. For the purposes of this definition,
-"submitted" means any form of electronic, verbal, or written communication sent
-to the Licensor or its representatives, including but not limited to
-communication on electronic mailing lists, source code control systems, and
-issue tracking systems that are managed by, or on behalf of, the Licensor for
-the purpose of discussing and improving the Work, but excluding communication
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-of whom a Contribution has been received by Licensor and subsequently
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-Derivative Works in Source or Object form.
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-grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
-irrevocable (except as stated in this section) patent license to make, have
-made, use, offer to sell, sell, import, and otherwise transfer the Work, where
-such license applies only to those patent claims licensable by such Contributor
-that are necessarily infringed by their Contribution(s) alone or by combination
-of their Contribution(s) with the Work to which such Contribution(s) was
-submitted. If You institute patent litigation against any entity (including a
-cross-claim or counterclaim in a lawsuit) alleging that the Work or a
-Contribution incorporated within the Work constitutes direct or contributory
-patent infringement, then any patent licenses granted to You under this License
-for that Work shall terminate as of the date such litigation is filed.
-
-4. Redistribution.
-
-You may reproduce and distribute copies of the Work or Derivative Works thereof
-in any medium, with or without modifications, and in Source or Object form,
-provided that You meet the following conditions:
-
-You must give any other recipients of the Work or Derivative Works a copy of
-this License; and
-You must cause any modified files to carry prominent notices stating that You
-changed the files; and
-You must retain, in the Source form of any Derivative Works that You distribute,
-all copyright, patent, trademark, and attribution notices from the Source form
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-Derivative Works; within the Source form or documentation, if provided along
-with the Derivative Works; or, within a display generated by the Derivative
-Works, if and wherever such third-party notices normally appear. The contents of
-the NOTICE file are for informational purposes only and do not modify the
-License. You may add Your own attribution notices within Derivative Works that
-You distribute, alongside or as an addendum to the NOTICE text from the Work,
-provided that such additional attribution notices cannot be construed as
-modifying the License.
-You may add Your own copyright statement to Your modifications and may provide
-additional or different license terms and conditions for use, reproduction, or
-distribution of Your modifications, or for any such Derivative Works as a whole,
-provided Your use, reproduction, and distribution of the Work otherwise complies
-with the conditions stated in this License.
-
-5. Submission of Contributions.
-
-Unless You explicitly state otherwise, any Contribution intentionally submitted
-for inclusion in the Work by You to the Licensor shall be under the terms and
-conditions of this License, without any additional terms or conditions.
-Notwithstanding the above, nothing herein shall supersede or modify the terms of
-any separate license agreement you may have executed with Licensor regarding
-such Contributions.
-
-6. Trademarks.
-
-This License does not grant permission to use the trade names, trademarks,
-service marks, or product names of the Licensor, except as required for
-reasonable and customary use in describing the origin of the Work and
-reproducing the content of the NOTICE file.
-
-7. Disclaimer of Warranty.
-
-Unless required by applicable law or agreed to in writing, Licensor provides the
-Work (and each Contributor provides its Contributions) on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
-including, without limitation, any warranties or conditions of TITLE,
-NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are
-solely responsible for determining the appropriateness of using or
-redistributing the Work and assume any risks associated with Your exercise of
-permissions under this License.
-
-8. Limitation of Liability.
-
-In no event and under no legal theory, whether in tort (including negligence),
-contract, or otherwise, unless required by applicable law (such as deliberate
-and grossly negligent acts) or agreed to in writing, shall any Contributor be
-liable to You for damages, including any direct, indirect, special, incidental,
-or consequential damages of any character arising as a result of this License or
-out of the use or inability to use the Work (including but not limited to
-damages for loss of goodwill, work stoppage, computer failure or malfunction, or
-any and all other commercial damages or losses), even if such Contributor has
-been advised of the possibility of such damages.
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-9. Accepting Warranty or Additional Liability.
-
-While redistributing the Work or Derivative Works thereof, You may choose to
-offer, and charge a fee for, acceptance of support, warranty, indemnity, or
-other liability obligations and/or rights consistent with this License. However,
-in accepting such obligations, You may act only on Your own behalf and on Your
-sole responsibility, not on behalf of any other Contributor, and only if You
-agree to indemnify, defend, and hold each Contributor harmless for any liability
-incurred by, or claims asserted against, such Contributor by reason of your
-accepting any such warranty or additional liability.
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-
-APPENDIX: How to apply the Apache License to your work
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-To apply the Apache License to your work, attach the following boilerplate
-notice, with the fields enclosed by brackets "[]" replaced with your own
-identifying information. (Don't include the brackets!) The text should be
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-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
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diff --git a/vendor/github.com/coreos/go-iptables/NOTICE b/vendor/github.com/coreos/go-iptables/NOTICE
deleted file mode 100644
index 23a0ada2f..000000000
--- a/vendor/github.com/coreos/go-iptables/NOTICE
+++ /dev/null
@@ -1,5 +0,0 @@
-CoreOS Project
-Copyright 2018 CoreOS, Inc
-
-This product includes software developed at CoreOS, Inc.
-(http://www.coreos.com/).
diff --git a/vendor/github.com/coreos/go-iptables/iptables/iptables.go b/vendor/github.com/coreos/go-iptables/iptables/iptables.go
deleted file mode 100644
index 9601bc78a..000000000
--- a/vendor/github.com/coreos/go-iptables/iptables/iptables.go
+++ /dev/null
@@ -1,532 +0,0 @@
-// Copyright 2015 CoreOS, Inc.
-//
-// Licensed 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.
-
-package iptables
-
-import (
-	"bytes"
-	"fmt"
-	"io"
-	"net"
-	"os/exec"
-	"regexp"
-	"strconv"
-	"strings"
-	"syscall"
-)
-
-// Adds the output of stderr to exec.ExitError
-type Error struct {
-	exec.ExitError
-	cmd        exec.Cmd
-	msg        string
-	proto      Protocol
-	exitStatus *int //for overriding
-}
-
-func (e *Error) ExitStatus() int {
-	if e.exitStatus != nil {
-		return *e.exitStatus
-	}
-	return e.Sys().(syscall.WaitStatus).ExitStatus()
-}
-
-func (e *Error) Error() string {
-	return fmt.Sprintf("running %v: exit status %v: %v", e.cmd.Args, e.ExitStatus(), e.msg)
-}
-
-// IsNotExist returns true if the error is due to the chain or rule not existing
-func (e *Error) IsNotExist() bool {
-	return e.ExitStatus() == 1 &&
-		(e.msg == fmt.Sprintf("%s: Bad rule (does a matching rule exist in that chain?).\n", getIptablesCommand(e.proto)) ||
-			e.msg == fmt.Sprintf("%s: No chain/target/match by that name.\n", getIptablesCommand(e.proto)))
-}
-
-// Protocol to differentiate between IPv4 and IPv6
-type Protocol byte
-
-const (
-	ProtocolIPv4 Protocol = iota
-	ProtocolIPv6
-)
-
-type IPTables struct {
-	path           string
-	proto          Protocol
-	hasCheck       bool
-	hasWait        bool
-	hasRandomFully bool
-	v1             int
-	v2             int
-	v3             int
-	mode           string // the underlying iptables operating mode, e.g. nf_tables
-}
-
-// New creates a new IPTables.
-// For backwards compatibility, this always uses IPv4, i.e. "iptables".
-func New() (*IPTables, error) {
-	return NewWithProtocol(ProtocolIPv4)
-}
-
-// New creates a new IPTables for the given proto.
-// The proto will determine which command is used, either "iptables" or "ip6tables".
-func NewWithProtocol(proto Protocol) (*IPTables, error) {
-	path, err := exec.LookPath(getIptablesCommand(proto))
-	if err != nil {
-		return nil, err
-	}
-	vstring, err := getIptablesVersionString(path)
-	v1, v2, v3, mode, err := extractIptablesVersion(vstring)
-
-	checkPresent, waitPresent, randomFullyPresent := getIptablesCommandSupport(v1, v2, v3)
-
-	ipt := IPTables{
-		path:           path,
-		proto:          proto,
-		hasCheck:       checkPresent,
-		hasWait:        waitPresent,
-		hasRandomFully: randomFullyPresent,
-		v1:             v1,
-		v2:             v2,
-		v3:             v3,
-		mode:           mode,
-	}
-	return &ipt, nil
-}
-
-// Proto returns the protocol used by this IPTables.
-func (ipt *IPTables) Proto() Protocol {
-	return ipt.proto
-}
-
-// Exists checks if given rulespec in specified table/chain exists
-func (ipt *IPTables) Exists(table, chain string, rulespec ...string) (bool, error) {
-	if !ipt.hasCheck {
-		return ipt.existsForOldIptables(table, chain, rulespec)
-
-	}
-	cmd := append([]string{"-t", table, "-C", chain}, rulespec...)
-	err := ipt.run(cmd...)
-	eerr, eok := err.(*Error)
-	switch {
-	case err == nil:
-		return true, nil
-	case eok && eerr.ExitStatus() == 1:
-		return false, nil
-	default:
-		return false, err
-	}
-}
-
-// Insert inserts rulespec to specified table/chain (in specified pos)
-func (ipt *IPTables) Insert(table, chain string, pos int, rulespec ...string) error {
-	cmd := append([]string{"-t", table, "-I", chain, strconv.Itoa(pos)}, rulespec...)
-	return ipt.run(cmd...)
-}
-
-// Append appends rulespec to specified table/chain
-func (ipt *IPTables) Append(table, chain string, rulespec ...string) error {
-	cmd := append([]string{"-t", table, "-A", chain}, rulespec...)
-	return ipt.run(cmd...)
-}
-
-// AppendUnique acts like Append except that it won't add a duplicate
-func (ipt *IPTables) AppendUnique(table, chain string, rulespec ...string) error {
-	exists, err := ipt.Exists(table, chain, rulespec...)
-	if err != nil {
-		return err
-	}
-
-	if !exists {
-		return ipt.Append(table, chain, rulespec...)
-	}
-
-	return nil
-}
-
-// Delete removes rulespec in specified table/chain
-func (ipt *IPTables) Delete(table, chain string, rulespec ...string) error {
-	cmd := append([]string{"-t", table, "-D", chain}, rulespec...)
-	return ipt.run(cmd...)
-}
-
-// List rules in specified table/chain
-func (ipt *IPTables) List(table, chain string) ([]string, error) {
-	args := []string{"-t", table, "-S", chain}
-	return ipt.executeList(args)
-}
-
-// List rules (with counters) in specified table/chain
-func (ipt *IPTables) ListWithCounters(table, chain string) ([]string, error) {
-	args := []string{"-t", table, "-v", "-S", chain}
-	return ipt.executeList(args)
-}
-
-// ListChains returns a slice containing the name of each chain in the specified table.
-func (ipt *IPTables) ListChains(table string) ([]string, error) {
-	args := []string{"-t", table, "-S"}
-
-	result, err := ipt.executeList(args)
-	if err != nil {
-		return nil, err
-	}
-
-	// Iterate over rules to find all default (-P) and user-specified (-N) chains.
-	// Chains definition always come before rules.
-	// Format is the following:
-	// -P OUTPUT ACCEPT
-	// -N Custom
-	var chains []string
-	for _, val := range result {
-		if strings.HasPrefix(val, "-P") || strings.HasPrefix(val, "-N") {
-			chains = append(chains, strings.Fields(val)[1])
-		} else {
-			break
-		}
-	}
-	return chains, nil
-}
-
-// Stats lists rules including the byte and packet counts
-func (ipt *IPTables) Stats(table, chain string) ([][]string, error) {
-	args := []string{"-t", table, "-L", chain, "-n", "-v", "-x"}
-	lines, err := ipt.executeList(args)
-	if err != nil {
-		return nil, err
-	}
-
-	appendSubnet := func(addr string) string {
-		if strings.IndexByte(addr, byte('/')) < 0 {
-			if strings.IndexByte(addr, '.') < 0 {
-				return addr + "/128"
-			}
-			return addr + "/32"
-		}
-		return addr
-	}
-
-	ipv6 := ipt.proto == ProtocolIPv6
-
-	rows := [][]string{}
-	for i, line := range lines {
-		// Skip over chain name and field header
-		if i < 2 {
-			continue
-		}
-
-		// Fields:
-		// 0=pkts 1=bytes 2=target 3=prot 4=opt 5=in 6=out 7=source 8=destination 9=options
-		line = strings.TrimSpace(line)
-		fields := strings.Fields(line)
-
-		// The ip6tables verbose output cannot be naively split due to the default "opt"
-		// field containing 2 single spaces.
-		if ipv6 {
-			// Check if field 6 is "opt" or "source" address
-			dest := fields[6]
-			ip, _, _ := net.ParseCIDR(dest)
-			if ip == nil {
-				ip = net.ParseIP(dest)
-			}
-
-			// If we detected a CIDR or IP, the "opt" field is empty.. insert it.
-			if ip != nil {
-				f := []string{}
-				f = append(f, fields[:4]...)
-				f = append(f, "  ") // Empty "opt" field for ip6tables
-				f = append(f, fields[4:]...)
-				fields = f
-			}
-		}
-
-		// Adjust "source" and "destination" to include netmask, to match regular
-		// List output
-		fields[7] = appendSubnet(fields[7])
-		fields[8] = appendSubnet(fields[8])
-
-		// Combine "options" fields 9... into a single space-delimited field.
-		options := fields[9:]
-		fields = fields[:9]
-		fields = append(fields, strings.Join(options, " "))
-		rows = append(rows, fields)
-	}
-	return rows, nil
-}
-
-func (ipt *IPTables) executeList(args []string) ([]string, error) {
-	var stdout bytes.Buffer
-	if err := ipt.runWithOutput(args, &stdout); err != nil {
-		return nil, err
-	}
-
-	rules := strings.Split(stdout.String(), "\n")
-
-	// strip trailing newline
-	if len(rules) > 0 && rules[len(rules)-1] == "" {
-		rules = rules[:len(rules)-1]
-	}
-
-	// nftables mode doesn't return an error code when listing a non-existent
-	// chain. Patch that up.
-	if len(rules) == 0 && ipt.mode == "nf_tables" {
-		v := 1
-		return nil, &Error{
-			cmd:        exec.Cmd{Args: args},
-			msg:        fmt.Sprintf("%s: No chain/target/match by that name.\n", getIptablesCommand(ipt.proto)),
-			proto:      ipt.proto,
-			exitStatus: &v,
-		}
-	}
-
-	for i, rule := range rules {
-		rules[i] = filterRuleOutput(rule)
-	}
-
-	return rules, nil
-}
-
-// NewChain creates a new chain in the specified table.
-// If the chain already exists, it will result in an error.
-func (ipt *IPTables) NewChain(table, chain string) error {
-	return ipt.run("-t", table, "-N", chain)
-}
-
-// ClearChain flushed (deletes all rules) in the specified table/chain.
-// If the chain does not exist, a new one will be created
-func (ipt *IPTables) ClearChain(table, chain string) error {
-	err := ipt.NewChain(table, chain)
-
-	// the exit code for "this table already exists" is different for
-	// different iptables modes
-	existsErr := 1
-	if ipt.mode == "nf_tables" {
-		existsErr = 4
-	}
-
-	eerr, eok := err.(*Error)
-	switch {
-	case err == nil:
-		return nil
-	case eok && eerr.ExitStatus() == existsErr:
-		// chain already exists. Flush (clear) it.
-		return ipt.run("-t", table, "-F", chain)
-	default:
-		return err
-	}
-}
-
-// RenameChain renames the old chain to the new one.
-func (ipt *IPTables) RenameChain(table, oldChain, newChain string) error {
-	return ipt.run("-t", table, "-E", oldChain, newChain)
-}
-
-// DeleteChain deletes the chain in the specified table.
-// The chain must be empty
-func (ipt *IPTables) DeleteChain(table, chain string) error {
-	return ipt.run("-t", table, "-X", chain)
-}
-
-// ChangePolicy changes policy on chain to target
-func (ipt *IPTables) ChangePolicy(table, chain, target string) error {
-	return ipt.run("-t", table, "-P", chain, target)
-}
-
-// Check if the underlying iptables command supports the --random-fully flag
-func (ipt *IPTables) HasRandomFully() bool {
-	return ipt.hasRandomFully
-}
-
-// Return version components of the underlying iptables command
-func (ipt *IPTables) GetIptablesVersion() (int, int, int) {
-	return ipt.v1, ipt.v2, ipt.v3
-}
-
-// run runs an iptables command with the given arguments, ignoring
-// any stdout output
-func (ipt *IPTables) run(args ...string) error {
-	return ipt.runWithOutput(args, nil)
-}
-
-// runWithOutput runs an iptables command with the given arguments,
-// writing any stdout output to the given writer
-func (ipt *IPTables) runWithOutput(args []string, stdout io.Writer) error {
-	args = append([]string{ipt.path}, args...)
-	if ipt.hasWait {
-		args = append(args, "--wait")
-	} else {
-		fmu, err := newXtablesFileLock()
-		if err != nil {
-			return err
-		}
-		ul, err := fmu.tryLock()
-		if err != nil {
-			return err
-		}
-		defer ul.Unlock()
-	}
-
-	var stderr bytes.Buffer
-	cmd := exec.Cmd{
-		Path:   ipt.path,
-		Args:   args,
-		Stdout: stdout,
-		Stderr: &stderr,
-	}
-
-	if err := cmd.Run(); err != nil {
-		switch e := err.(type) {
-		case *exec.ExitError:
-			return &Error{*e, cmd, stderr.String(), ipt.proto, nil}
-		default:
-			return err
-		}
-	}
-
-	return nil
-}
-
-// getIptablesCommand returns the correct command for the given protocol, either "iptables" or "ip6tables".
-func getIptablesCommand(proto Protocol) string {
-	if proto == ProtocolIPv6 {
-		return "ip6tables"
-	} else {
-		return "iptables"
-	}
-}
-
-// Checks if iptables has the "-C" and "--wait" flag
-func getIptablesCommandSupport(v1 int, v2 int, v3 int) (bool, bool, bool) {
-	return iptablesHasCheckCommand(v1, v2, v3), iptablesHasWaitCommand(v1, v2, v3), iptablesHasRandomFully(v1, v2, v3)
-}
-
-// getIptablesVersion returns the first three components of the iptables version
-// and the operating mode (e.g. nf_tables or legacy)
-// e.g. "iptables v1.3.66" would return (1, 3, 66, legacy, nil)
-func extractIptablesVersion(str string) (int, int, int, string, error) {
-	versionMatcher := regexp.MustCompile(`v([0-9]+)\.([0-9]+)\.([0-9]+)(?:\s+\((\w+))?`)
-	result := versionMatcher.FindStringSubmatch(str)
-	if result == nil {
-		return 0, 0, 0, "", fmt.Errorf("no iptables version found in string: %s", str)
-	}
-
-	v1, err := strconv.Atoi(result[1])
-	if err != nil {
-		return 0, 0, 0, "", err
-	}
-
-	v2, err := strconv.Atoi(result[2])
-	if err != nil {
-		return 0, 0, 0, "", err
-	}
-
-	v3, err := strconv.Atoi(result[3])
-	if err != nil {
-		return 0, 0, 0, "", err
-	}
-
-	mode := "legacy"
-	if result[4] != "" {
-		mode = result[4]
-	}
-	return v1, v2, v3, mode, nil
-}
-
-// Runs "iptables --version" to get the version string
-func getIptablesVersionString(path string) (string, error) {
-	cmd := exec.Command(path, "--version")
-	var out bytes.Buffer
-	cmd.Stdout = &out
-	err := cmd.Run()
-	if err != nil {
-		return "", err
-	}
-	return out.String(), nil
-}
-
-// Checks if an iptables version is after 1.4.11, when --check was added
-func iptablesHasCheckCommand(v1 int, v2 int, v3 int) bool {
-	if v1 > 1 {
-		return true
-	}
-	if v1 == 1 && v2 > 4 {
-		return true
-	}
-	if v1 == 1 && v2 == 4 && v3 >= 11 {
-		return true
-	}
-	return false
-}
-
-// Checks if an iptables version is after 1.4.20, when --wait was added
-func iptablesHasWaitCommand(v1 int, v2 int, v3 int) bool {
-	if v1 > 1 {
-		return true
-	}
-	if v1 == 1 && v2 > 4 {
-		return true
-	}
-	if v1 == 1 && v2 == 4 && v3 >= 20 {
-		return true
-	}
-	return false
-}
-
-// Checks if an iptables version is after 1.6.2, when --random-fully was added
-func iptablesHasRandomFully(v1 int, v2 int, v3 int) bool {
-	if v1 > 1 {
-		return true
-	}
-	if v1 == 1 && v2 > 6 {
-		return true
-	}
-	if v1 == 1 && v2 == 6 && v3 >= 2 {
-		return true
-	}
-	return false
-}
-
-// Checks if a rule specification exists for a table
-func (ipt *IPTables) existsForOldIptables(table, chain string, rulespec []string) (bool, error) {
-	rs := strings.Join(append([]string{"-A", chain}, rulespec...), " ")
-	args := []string{"-t", table, "-S"}
-	var stdout bytes.Buffer
-	err := ipt.runWithOutput(args, &stdout)
-	if err != nil {
-		return false, err
-	}
-	return strings.Contains(stdout.String(), rs), nil
-}
-
-// counterRegex is the regex used to detect nftables counter format
-var counterRegex = regexp.MustCompile(`^\[([0-9]+):([0-9]+)\] `)
-
-// filterRuleOutput works around some inconsistencies in output.
-// For example, when iptables is in legacy vs. nftables mode, it produces
-// different results.
-func filterRuleOutput(rule string) string {
-	out := rule
-
-	// work around an output difference in nftables mode where counters
-	// are output in iptables-save format, rather than iptables -S format
-	// The string begins with "[0:0]"
-	//
-	// Fixes #49
-	if groups := counterRegex.FindStringSubmatch(out); groups != nil {
-		// drop the brackets
-		out = out[len(groups[0]):]
-		out = fmt.Sprintf("%s -c %s %s", out, groups[1], groups[2])
-	}
-
-	return out
-}
diff --git a/vendor/github.com/coreos/go-iptables/iptables/lock.go b/vendor/github.com/coreos/go-iptables/iptables/lock.go
deleted file mode 100644
index a88e92b4e..000000000
--- a/vendor/github.com/coreos/go-iptables/iptables/lock.go
+++ /dev/null
@@ -1,84 +0,0 @@
-// Copyright 2015 CoreOS, Inc.
-//
-// Licensed 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.
-
-package iptables
-
-import (
-	"os"
-	"sync"
-	"syscall"
-)
-
-const (
-	// In earlier versions of iptables, the xtables lock was implemented
-	// via a Unix socket, but now flock is used via this lockfile:
-	// http://git.netfilter.org/iptables/commit/?id=aa562a660d1555b13cffbac1e744033e91f82707
-	// Note the LSB-conforming "/run" directory does not exist on old
-	// distributions, so assume "/var" is symlinked
-	xtablesLockFilePath = "/var/run/xtables.lock"
-
-	defaultFilePerm = 0600
-)
-
-type Unlocker interface {
-	Unlock() error
-}
-
-type nopUnlocker struct{}
-
-func (_ nopUnlocker) Unlock() error { return nil }
-
-type fileLock struct {
-	// mu is used to protect against concurrent invocations from within this process
-	mu sync.Mutex
-	fd int
-}
-
-// tryLock takes an exclusive lock on the xtables lock file without blocking.
-// This is best-effort only: if the exclusive lock would block (i.e. because
-// another process already holds it), no error is returned. Otherwise, any
-// error encountered during the locking operation is returned.
-// The returned Unlocker should be used to release the lock when the caller is
-// done invoking iptables commands.
-func (l *fileLock) tryLock() (Unlocker, error) {
-	l.mu.Lock()
-	err := syscall.Flock(l.fd, syscall.LOCK_EX|syscall.LOCK_NB)
-	switch err {
-	case syscall.EWOULDBLOCK:
-		l.mu.Unlock()
-		return nopUnlocker{}, nil
-	case nil:
-		return l, nil
-	default:
-		l.mu.Unlock()
-		return nil, err
-	}
-}
-
-// Unlock closes the underlying file, which implicitly unlocks it as well. It
-// also unlocks the associated mutex.
-func (l *fileLock) Unlock() error {
-	defer l.mu.Unlock()
-	return syscall.Close(l.fd)
-}
-
-// newXtablesFileLock opens a new lock on the xtables lockfile without
-// acquiring the lock
-func newXtablesFileLock() (*fileLock, error) {
-	fd, err := syscall.Open(xtablesLockFilePath, os.O_CREATE, defaultFilePerm)
-	if err != nil {
-		return nil, err
-	}
-	return &fileLock{fd: fd}, nil
-}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 4b992352c..3acff38c9 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -144,8 +144,6 @@ github.com/containers/storage/drivers/quota
 github.com/containers/storage/pkg/fsutils
 github.com/containers/storage/pkg/ostree
 github.com/containers/storage/drivers/copy
-# github.com/coreos/go-iptables v0.4.1
-github.com/coreos/go-iptables/iptables
 # github.com/coreos/go-systemd v0.0.0-20190620071333-e64a0ec8b42a
 github.com/coreos/go-systemd/activation
 github.com/coreos/go-systemd/dbus