diff options
Diffstat (limited to 'test/iptables/iptables_util.go')
-rw-r--r-- | test/iptables/iptables_util.go | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/test/iptables/iptables_util.go b/test/iptables/iptables_util.go deleted file mode 100644 index 3a4d11f1a..000000000 --- a/test/iptables/iptables_util.go +++ /dev/null @@ -1,82 +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 ( - "fmt" - "net" - "os/exec" - "time" -) - -const iptablesBinary = "iptables" - -// filterTable calls `iptables -t filter` with the given args. -func filterTable(args ...string) error { - args = append([]string{"-t", "filter"}, args...) - cmd := exec.Command(iptablesBinary, 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 -} - -// listenUDP listens on a UDP port and returns the value of net.Conn.Read() for -// the first read on that port. -func listenUDP(port int, timeout time.Duration) error { - localAddr := net.UDPAddr{ - Port: port, - } - conn, err := net.ListenUDP(network, &localAddr) - if err != nil { - return err - } - defer conn.Close() - conn.SetDeadline(time.Now().Add(timeout)) - _, err = conn.Read([]byte{0}) - return err -} - -// sendUDPLoop sends 1 byte UDP packets repeatedly to the IP and port specified -// over a duration. -func sendUDPLoop(ip net.IP, port int, duration time.Duration) error { - // Send packets for a few seconds. - remote := net.UDPAddr{ - IP: ip, - Port: port, - } - conn, err := net.DialUDP(network, nil, &remote) - if err != nil { - return err - } - defer conn.Close() - - to := time.After(duration) - for timedOut := false; !timedOut; { - // 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 <-to: - timedOut = true - default: - time.Sleep(200 * time.Millisecond) - } - } - - return nil -} |