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https://github.com/tailscale/tailscale.git
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7eaf5e509f
Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package monitor
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import (
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"net"
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"testing"
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"github.com/jsimonetti/rtnetlink"
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"github.com/mdlayher/netlink"
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"golang.org/x/sys/unix"
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"tailscale.com/net/netaddr"
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)
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func newAddrMsg(iface uint32, addr string, typ netlink.HeaderType) netlink.Message {
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ip := net.ParseIP(addr)
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if ip == nil {
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panic("newAddrMsg: invalid addr: " + addr)
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}
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addrMsg := rtnetlink.AddressMessage{
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Index: iface,
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Attributes: &rtnetlink.AddressAttributes{
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Address: ip,
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},
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}
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b, err := addrMsg.MarshalBinary()
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if err != nil {
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panic(err)
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}
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return netlink.Message{
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Header: netlink.Header{Type: typ},
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Data: b,
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}
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}
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// See issue #4282 and nlConn.addrCache.
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func TestIgnoreDuplicateNEWADDR(t *testing.T) {
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mustReceive := func(c *nlConn) message {
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msg, err := c.Receive()
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if err != nil {
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t.Fatalf("mustReceive: unwanted error: %s", err)
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}
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return msg
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}
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t.Run("suppress duplicate NEWADDRs", func(t *testing.T) {
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c := nlConn{
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buffered: []netlink.Message{
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newAddrMsg(1, "192.168.0.5", unix.RTM_NEWADDR),
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newAddrMsg(1, "192.168.0.5", unix.RTM_NEWADDR),
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},
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addrCache: make(map[uint32]map[netaddr.IP]bool),
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}
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msg := mustReceive(&c)
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if _, ok := msg.(*newAddrMessage); !ok {
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t.Fatalf("want newAddrMessage, got %T %v", msg, msg)
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}
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msg = mustReceive(&c)
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if _, ok := msg.(ignoreMessage); !ok {
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t.Fatalf("want ignoreMessage, got %T %v", msg, msg)
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}
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})
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t.Run("do not suppress after DELADDR", func(t *testing.T) {
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c := nlConn{
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buffered: []netlink.Message{
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newAddrMsg(1, "192.168.0.5", unix.RTM_NEWADDR),
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newAddrMsg(1, "192.168.0.5", unix.RTM_DELADDR),
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newAddrMsg(1, "192.168.0.5", unix.RTM_NEWADDR),
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},
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addrCache: make(map[uint32]map[netaddr.IP]bool),
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}
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msg := mustReceive(&c)
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if _, ok := msg.(*newAddrMessage); !ok {
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t.Fatalf("want newAddrMessage, got %T %v", msg, msg)
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}
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msg = mustReceive(&c)
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if m, ok := msg.(*newAddrMessage); !ok {
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t.Fatalf("want newAddrMessage, got %T %v", msg, msg)
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} else {
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if !m.Delete {
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t.Fatalf("want delete, got %#v", m)
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}
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}
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msg = mustReceive(&c)
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if _, ok := msg.(*newAddrMessage); !ok {
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t.Fatalf("want newAddrMessage, got %T %v", msg, msg)
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}
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})
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}
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