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-rw-r--r--test/iptables/iptables_util.go327
1 files changed, 0 insertions, 327 deletions
diff --git a/test/iptables/iptables_util.go b/test/iptables/iptables_util.go
deleted file mode 100644
index 4590e169d..000000000
--- a/test/iptables/iptables_util.go
+++ /dev/null
@@ -1,327 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// 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 (
- "context"
- "encoding/binary"
- "errors"
- "fmt"
- "net"
- "os/exec"
- "strings"
- "time"
-
- "gvisor.dev/gvisor/pkg/test/testutil"
-)
-
-// filterTable calls `ip{6}tables -t filter` with the given args.
-func filterTable(ipv6 bool, args ...string) error {
- return tableCmd(ipv6, "filter", args)
-}
-
-// natTable calls `ip{6}tables -t nat` with the given args.
-func natTable(ipv6 bool, args ...string) error {
- return tableCmd(ipv6, "nat", args)
-}
-
-func tableCmd(ipv6 bool, table string, args []string) error {
- args = append([]string{"-t", table}, args...)
- binary := "iptables"
- if ipv6 {
- binary = "ip6tables"
- }
- cmd := exec.Command(binary, args...)
- if out, err := cmd.CombinedOutput(); err != nil {
- return fmt.Errorf("error running iptables with args %v\nerror: %v\noutput: %s", args, err, string(out))
- }
- return nil
-}
-
-// filterTableRules is like filterTable, but runs multiple iptables commands.
-func filterTableRules(ipv6 bool, argsList [][]string) error {
- return tableRules(ipv6, "filter", argsList)
-}
-
-// natTableRules is like natTable, but runs multiple iptables commands.
-func natTableRules(ipv6 bool, argsList [][]string) error {
- return tableRules(ipv6, "nat", argsList)
-}
-
-func tableRules(ipv6 bool, table string, argsList [][]string) error {
- for _, args := range argsList {
- if err := tableCmd(ipv6, table, args); err != nil {
- return err
- }
- }
- return nil
-}
-
-// listenUDP listens on a UDP port and returns nil if the first read from that
-// port is successful.
-func listenUDP(ctx context.Context, port int, ipv6 bool) error {
- _, err := listenUDPFrom(ctx, port, ipv6)
- return err
-}
-
-// listenUDPFrom listens on a UDP port and returns the sender's UDP address if
-// the first read from that port is successful.
-func listenUDPFrom(ctx context.Context, port int, ipv6 bool) (*net.UDPAddr, error) {
- localAddr := net.UDPAddr{
- Port: port,
- }
- conn, err := net.ListenUDP(udpNetwork(ipv6), &localAddr)
- if err != nil {
- return nil, err
- }
- defer conn.Close()
-
- type result struct {
- remoteAddr *net.UDPAddr
- err error
- }
-
- ch := make(chan result)
- go func() {
- _, remoteAddr, err := conn.ReadFromUDP([]byte{0})
- ch <- result{remoteAddr, err}
- }()
-
- select {
- case res := <-ch:
- return res.remoteAddr, res.err
- case <-ctx.Done():
- return nil, fmt.Errorf("timed out reading from %s: %w", &localAddr, ctx.Err())
- }
-}
-
-// sendUDPLoop sends 1 byte UDP packets repeatedly to the IP and port specified
-// over a duration.
-func sendUDPLoop(ctx context.Context, ip net.IP, port int, ipv6 bool) error {
- remote := net.UDPAddr{
- IP: ip,
- Port: port,
- }
- conn, err := net.DialUDP(udpNetwork(ipv6), nil, &remote)
- if err != nil {
- return err
- }
- defer conn.Close()
-
- for {
- // This may return an error (connection refused) if the remote
- // hasn't started listening yet or they're dropping our
- // packets. So we ignore Write errors and depend on the remote
- // to report a failure if it doesn't get a packet it needs.
- conn.Write([]byte{0})
- select {
- case <-ctx.Done():
- // Being cancelled or timing out isn't an error, as we
- // cannot tell with UDP whether we succeeded.
- return nil
- // Continue looping.
- case <-time.After(200 * time.Millisecond):
- }
- }
-}
-
-// listenTCP listens for connections on a TCP port, and returns nil if a
-// connection is established.
-func listenTCP(ctx context.Context, port int, ipv6 bool) error {
- _, err := listenTCPFrom(ctx, port, ipv6)
- return err
-}
-
-// listenTCP listens for connections on a TCP port, and returns the remote
-// TCP address if a connection is established.
-func listenTCPFrom(ctx context.Context, port int, ipv6 bool) (net.Addr, error) {
- localAddr := net.TCPAddr{
- Port: port,
- }
-
- // Starts listening on port.
- lConn, err := net.ListenTCP(tcpNetwork(ipv6), &localAddr)
- if err != nil {
- return nil, err
- }
- defer lConn.Close()
-
- type result struct {
- remoteAddr net.Addr
- err error
- }
-
- // Accept connections on port.
- ch := make(chan result)
- go func() {
- conn, err := lConn.AcceptTCP()
- var remoteAddr net.Addr
- if err == nil {
- remoteAddr = conn.RemoteAddr()
- }
- ch <- result{remoteAddr, err}
- conn.Close()
- }()
-
- select {
- case res := <-ch:
- return res.remoteAddr, res.err
- case <-ctx.Done():
- return nil, fmt.Errorf("timed out waiting for a connection at %s: %w", &localAddr, ctx.Err())
- }
-}
-
-// connectTCP connects to the given IP and port from an ephemeral local address.
-func connectTCP(ctx context.Context, ip net.IP, port int, ipv6 bool) error {
- contAddr := net.TCPAddr{
- IP: ip,
- Port: port,
- }
- // The container may not be listening when we first connect, so retry
- // upon error.
- callback := func() error {
- var d net.Dialer
- conn, err := d.DialContext(ctx, tcpNetwork(ipv6), contAddr.String())
- if conn != nil {
- conn.Close()
- }
- return err
- }
- if err := testutil.PollContext(ctx, callback); err != nil {
- return fmt.Errorf("timed out waiting to connect IP on port %v, most recent error: %w", port, err)
- }
-
- return nil
-}
-
-// localAddrs returns a list of local network interface addresses. When ipv6 is
-// true, only IPv6 addresses are returned. Otherwise only IPv4 addresses are
-// returned.
-func localAddrs(ipv6 bool) ([]string, error) {
- addrs, err := net.InterfaceAddrs()
- if err != nil {
- return nil, err
- }
- addrStrs := make([]string, 0, len(addrs))
- for _, addr := range addrs {
- // Add only IPv4 or only IPv6 addresses.
- parts := strings.Split(addr.String(), "/")
- if len(parts) != 2 {
- return nil, fmt.Errorf("bad interface address: %q", addr.String())
- }
- if isIPv6 := net.ParseIP(parts[0]).To4() == nil; isIPv6 == ipv6 {
- addrStrs = append(addrStrs, addr.String())
- }
- }
- return filterAddrs(addrStrs, ipv6), nil
-}
-
-func filterAddrs(addrs []string, ipv6 bool) []string {
- addrStrs := make([]string, 0, len(addrs))
- for _, addr := range addrs {
- // Add only IPv4 or only IPv6 addresses.
- parts := strings.Split(addr, "/")
- if isIPv6 := net.ParseIP(parts[0]).To4() == nil; isIPv6 == ipv6 {
- addrStrs = append(addrStrs, parts[0])
- }
- }
- return addrStrs
-}
-
-// getInterfaceName returns the name of the interface other than loopback.
-func getInterfaceName() (string, bool) {
- iface, ok := getNonLoopbackInterface()
- if !ok {
- return "", false
- }
- return iface.Name, true
-}
-
-func getInterfaceAddrs(ipv6 bool) ([]net.IP, error) {
- iface, ok := getNonLoopbackInterface()
- if !ok {
- return nil, errors.New("no non-loopback interface found")
- }
- addrs, err := iface.Addrs()
- if err != nil {
- return nil, err
- }
-
- // Get only IPv4 or IPv6 addresses.
- ips := make([]net.IP, 0, len(addrs))
- for _, addr := range addrs {
- parts := strings.Split(addr.String(), "/")
- var ip net.IP
- // To16() returns IPv4 addresses as IPv4-mapped IPv6 addresses.
- // So we check whether To4() returns nil to test whether the
- // address is v4 or v6.
- if v4 := net.ParseIP(parts[0]).To4(); ipv6 && v4 == nil {
- ip = net.ParseIP(parts[0]).To16()
- } else {
- ip = v4
- }
- if ip != nil {
- ips = append(ips, ip)
- }
- }
- return ips, nil
-}
-
-func getNonLoopbackInterface() (net.Interface, bool) {
- if interfaces, err := net.Interfaces(); err == nil {
- for _, intf := range interfaces {
- if intf.Name != "lo" {
- return intf, true
- }
- }
- }
- return net.Interface{}, false
-}
-
-func htons(x uint16) uint16 {
- buf := make([]byte, 2)
- binary.BigEndian.PutUint16(buf, x)
- return binary.LittleEndian.Uint16(buf)
-}
-
-func localIP(ipv6 bool) string {
- if ipv6 {
- return "::1"
- }
- return "127.0.0.1"
-}
-
-func nowhereIP(ipv6 bool) string {
- if ipv6 {
- return "2001:db8::1"
- }
- return "192.0.2.1"
-}
-
-// udpNetwork returns an IPv6 or IPv6 UDP network argument to net.Dial.
-func udpNetwork(ipv6 bool) string {
- if ipv6 {
- return "udp6"
- }
- return "udp4"
-}
-
-// tcpNetwork returns an IPv6 or IPv6 TCP network argument to net.Dial.
-func tcpNetwork(ipv6 bool) string {
- if ipv6 {
- return "tcp6"
- }
- return "tcp4"
-}