91 lines
2.7 KiB
Go
91 lines
2.7 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// +build !integration
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package sniffer
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestSniffer_afpacketComputeSize(t *testing.T) {
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var frameSize, blockSize, numBlocks int
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var err error
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frameSize, blockSize, numBlocks, err = afpacketComputeSize(30, 1514, 4096)
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if err != nil {
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t.Error(err)
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}
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if frameSize != 2048 || blockSize != 2048*128 || numBlocks != 120 {
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t.Error("Bad result", frameSize, blockSize, numBlocks)
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}
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if blockSize*numBlocks > 30*1024*1024 {
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t.Error("Value too big", blockSize, numBlocks)
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}
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frameSize, blockSize, numBlocks, err = afpacketComputeSize(1, 1514, 4096)
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if err != nil {
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t.Error(err)
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}
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if frameSize != 2048 || blockSize != 2048*128 || numBlocks != 4 {
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t.Error("Bad result", blockSize, numBlocks)
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}
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if blockSize*numBlocks > 1*1024*1024 {
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t.Error("Value too big", blockSize, numBlocks)
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}
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frameSize, blockSize, numBlocks, err = afpacketComputeSize(0, 1514, 4096)
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if err == nil {
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t.Error("Expected an error")
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}
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// 16436 is the default MTU size of the loopback interface
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frameSize, blockSize, numBlocks, err = afpacketComputeSize(30, 16436, 4096)
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if frameSize != 4096*5 || blockSize != 4096*5*128 || numBlocks != 12 {
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t.Error("Bad result", frameSize, blockSize, numBlocks)
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}
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frameSize, blockSize, numBlocks, err = afpacketComputeSize(3, 16436, 4096)
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if err != nil {
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t.Error(err)
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}
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if frameSize != 4096*5 || blockSize != 4096*5*128 || numBlocks != 1 {
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t.Error("Bad result", frameSize, blockSize, numBlocks)
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}
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}
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func Test_deviceNameFromIndex(t *testing.T) {
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devs := []string{"lo", "eth0", "eth1"}
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name, err := deviceNameFromIndex(0, devs)
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assert.Equal(t, "lo", name)
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assert.NoError(t, err)
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name, err = deviceNameFromIndex(1, devs)
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assert.Equal(t, "eth0", name)
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assert.NoError(t, err)
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name, err = deviceNameFromIndex(2, devs)
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assert.Equal(t, "eth1", name)
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assert.NoError(t, err)
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_, err = deviceNameFromIndex(3, devs)
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assert.Error(t, err)
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}
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