[VOL-2235] Mocks and interfaces for rw-core
This update consists of mocks that are used by the rw-core
during unit testing. It also includes interfaces used for unit
tests.
Change-Id: I20ca1455c358113c3aa897acc6355e0ddbc614b7
diff --git a/vendor/go.etcd.io/etcd/pkg/netutil/isolate_linux.go b/vendor/go.etcd.io/etcd/pkg/netutil/isolate_linux.go
new file mode 100644
index 0000000..418580a
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/pkg/netutil/isolate_linux.go
@@ -0,0 +1,82 @@
+// Copyright 2015 The etcd 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 netutil
+
+import (
+ "fmt"
+ "os/exec"
+)
+
+// DropPort drops all tcp packets that are received from the given port and sent to the given port.
+func DropPort(port int) error {
+ cmdStr := fmt.Sprintf("sudo iptables -A OUTPUT -p tcp --destination-port %d -j DROP", port)
+ if _, err := exec.Command("/bin/sh", "-c", cmdStr).Output(); err != nil {
+ return err
+ }
+ cmdStr = fmt.Sprintf("sudo iptables -A INPUT -p tcp --destination-port %d -j DROP", port)
+ _, err := exec.Command("/bin/sh", "-c", cmdStr).Output()
+ return err
+}
+
+// RecoverPort stops dropping tcp packets at given port.
+func RecoverPort(port int) error {
+ cmdStr := fmt.Sprintf("sudo iptables -D OUTPUT -p tcp --destination-port %d -j DROP", port)
+ if _, err := exec.Command("/bin/sh", "-c", cmdStr).Output(); err != nil {
+ return err
+ }
+ cmdStr = fmt.Sprintf("sudo iptables -D INPUT -p tcp --destination-port %d -j DROP", port)
+ _, err := exec.Command("/bin/sh", "-c", cmdStr).Output()
+ return err
+}
+
+// SetLatency adds latency in millisecond scale with random variations.
+func SetLatency(ms, rv int) error {
+ ifces, err := GetDefaultInterfaces()
+ if err != nil {
+ return err
+ }
+
+ if rv > ms {
+ rv = 1
+ }
+ for ifce := range ifces {
+ cmdStr := fmt.Sprintf("sudo tc qdisc add dev %s root netem delay %dms %dms distribution normal", ifce, ms, rv)
+ _, err = exec.Command("/bin/sh", "-c", cmdStr).Output()
+ if err != nil {
+ // the rule has already been added. Overwrite it.
+ cmdStr = fmt.Sprintf("sudo tc qdisc change dev %s root netem delay %dms %dms distribution normal", ifce, ms, rv)
+ _, err = exec.Command("/bin/sh", "-c", cmdStr).Output()
+ if err != nil {
+ return err
+ }
+ }
+ }
+ return nil
+}
+
+// RemoveLatency resets latency configurations.
+func RemoveLatency() error {
+ ifces, err := GetDefaultInterfaces()
+ if err != nil {
+ return err
+ }
+ for ifce := range ifces {
+ _, err = exec.Command("/bin/sh", "-c", fmt.Sprintf("sudo tc qdisc del dev %s root netem", ifce)).Output()
+ if err != nil {
+ return err
+ }
+ }
+ return nil
+}