79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
// Copyright 2020 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package icmpv6_param_problem_test
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import (
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"encoding/binary"
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"flag"
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"testing"
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"time"
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"gvisor.dev/gvisor/pkg/tcpip/header"
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tb "gvisor.dev/gvisor/test/packetimpact/testbench"
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)
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func init() {
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tb.RegisterFlags(flag.CommandLine)
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}
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// TestICMPv6ParamProblemTest sends a packet with a bad next header. The DUT
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// should respond with an ICMPv6 Parameter Problem message.
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func TestICMPv6ParamProblemTest(t *testing.T) {
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dut := tb.NewDUT(t)
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defer dut.TearDown()
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conn := tb.NewIPv6Conn(t, tb.IPv6{}, tb.IPv6{})
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defer conn.Close()
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ipv6 := tb.IPv6{
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// 254 is reserved and used for experimentation and testing. This should
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// cause an error.
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NextHeader: tb.Uint8(254),
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}
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icmpv6 := tb.ICMPv6{
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Type: tb.ICMPv6Type(header.ICMPv6EchoRequest),
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NDPPayload: []byte("hello world"),
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}
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toSend := conn.CreateFrame(ipv6, &icmpv6)
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conn.SendFrame(toSend)
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// Build the expected ICMPv6 payload, which includes an index to the
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// problematic byte and also the problematic packet as described in
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// https://tools.ietf.org/html/rfc4443#page-12 .
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ipv6Sent := toSend[1:]
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expectedPayload, err := ipv6Sent.ToBytes()
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if err != nil {
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t.Fatalf("can't convert %s to bytes: %s", ipv6Sent, err)
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}
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// The problematic field is the NextHeader.
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b := make([]byte, 4)
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binary.BigEndian.PutUint32(b, header.IPv6NextHeaderOffset)
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expectedPayload = append(b, expectedPayload...)
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expectedICMPv6 := tb.ICMPv6{
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Type: tb.ICMPv6Type(header.ICMPv6ParamProblem),
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NDPPayload: expectedPayload,
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}
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paramProblem := tb.Layers{
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&tb.Ether{},
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&tb.IPv6{},
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&expectedICMPv6,
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}
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timeout := time.Second
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if _, err := conn.ExpectFrame(paramProblem, timeout); err != nil {
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t.Errorf("expected %s within %s but got none: %s", paramProblem, timeout, err)
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}
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}
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