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c12534d8b4
It seems that if you set the packet mark on a packet and then route that packet through a kernel VXLAN interface, the VXLAN-encapsulated packet will still have the mark from the original packet. Since our NAT rules are based on the packet mark, this was causing us to double-NAT some packets, which then triggered a kernel checksumming bug. But even without the checksum bug, there are reasons to avoid double-NATting, so fix the rules to unmark the packets before masquerading them.
46 lines
951 B
Go
46 lines
951 B
Go
// +build linux
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/*
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Copyright 2016 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package kubelet
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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 TestGetIPTablesMark(t *testing.T) {
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tests := []struct {
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bit int
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expect string
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}{
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{
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14,
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"0x00004000",
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},
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{
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15,
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"0x00008000",
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},
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}
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for _, tc := range tests {
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res := getIPTablesMark(tc.bit)
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assert.Equal(t, tc.expect, res, "input %d", tc.bit)
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}
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}
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