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actions.go
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actions.go
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// Copyright (c) 2017-2022 Tigera, Inc. All rights reserved.
//
// 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 iptables
import (
"fmt"
"github.com/dtest11/calico/felix/environment"
)
type Action interface {
ToFragment(features *environment.Features) string
String() string
}
type Referrer interface {
ReferencedChain() string
}
type GotoAction struct {
Target string
TypeGoto struct{}
}
func (g GotoAction) ToFragment(features *environment.Features) string {
return "--goto " + g.Target
}
func (g GotoAction) String() string {
return "Goto->" + g.Target
}
func (g GotoAction) ReferencedChain() string {
return g.Target
}
var _ Referrer = GotoAction{}
type JumpAction struct {
Target string
TypeJump struct{}
}
func (g JumpAction) ToFragment(features *environment.Features) string {
return "--jump " + g.Target
}
func (g JumpAction) String() string {
return "Jump->" + g.Target
}
func (g JumpAction) ReferencedChain() string {
return g.Target
}
var _ Referrer = JumpAction{}
type ReturnAction struct {
TypeReturn struct{}
}
func (r ReturnAction) ToFragment(features *environment.Features) string {
return "--jump RETURN"
}
func (r ReturnAction) String() string {
return "Return"
}
type DropAction struct {
TypeDrop struct{}
}
func (g DropAction) ToFragment(features *environment.Features) string {
return "--jump DROP"
}
func (g DropAction) String() string {
return "Drop"
}
type RejectAction struct {
TypeReject struct{}
}
func (g RejectAction) ToFragment(features *environment.Features) string {
return "--jump REJECT"
}
func (g RejectAction) String() string {
return "Reject"
}
type LogAction struct {
Prefix string
TypeLog struct{}
}
func (g LogAction) ToFragment(features *environment.Features) string {
return fmt.Sprintf(`--jump LOG --log-prefix "%s: " --log-level 5`, g.Prefix)
}
func (g LogAction) String() string {
return "Log"
}
type AcceptAction struct {
TypeAccept struct{}
}
func (g AcceptAction) ToFragment(features *environment.Features) string {
return "--jump ACCEPT"
}
func (g AcceptAction) String() string {
return "Accept"
}
type DNATAction struct {
DestAddr string
DestPort uint16
TypeDNAT struct{}
}
func (g DNATAction) ToFragment(features *environment.Features) string {
if g.DestPort == 0 {
return fmt.Sprintf("--jump DNAT --to-destination %s", g.DestAddr)
} else {
return fmt.Sprintf("--jump DNAT --to-destination %s:%d", g.DestAddr, g.DestPort)
}
}
func (g DNATAction) String() string {
return fmt.Sprintf("DNAT->%s:%d", g.DestAddr, g.DestPort)
}
type SNATAction struct {
ToAddr string
TypeSNAT struct{}
}
func (g SNATAction) ToFragment(features *environment.Features) string {
fullyRand := ""
if features.SNATFullyRandom {
fullyRand = " --random-fully"
}
return fmt.Sprintf("--jump SNAT --to-source %s%s", g.ToAddr, fullyRand)
}
func (g SNATAction) String() string {
return fmt.Sprintf("SNAT->%s", g.ToAddr)
}
type MasqAction struct {
ToPorts string
TypeMasq struct{}
}
func (g MasqAction) ToFragment(features *environment.Features) string {
fullyRand := ""
if features.MASQFullyRandom {
fullyRand = " --random-fully"
}
if g.ToPorts != "" {
return fmt.Sprintf("--jump MASQUERADE --to-ports %s"+fullyRand, g.ToPorts)
}
return "--jump MASQUERADE" + fullyRand
}
func (g MasqAction) String() string {
return "Masq"
}
type ClearMarkAction struct {
Mark uint32
TypeClearMark struct{}
}
func (c ClearMarkAction) ToFragment(features *environment.Features) string {
return fmt.Sprintf("--jump MARK --set-mark 0/%#x", c.Mark)
}
func (c ClearMarkAction) String() string {
return fmt.Sprintf("Clear:%#x", c.Mark)
}
type SetMarkAction struct {
Mark uint32
TypeSetMark struct{}
}
func (c SetMarkAction) ToFragment(features *environment.Features) string {
return fmt.Sprintf("--jump MARK --set-mark %#x/%#x", c.Mark, c.Mark)
}
func (c SetMarkAction) String() string {
return fmt.Sprintf("Set:%#x", c.Mark)
}
type SetMaskedMarkAction struct {
Mark uint32
Mask uint32
TypeSetMaskedMark struct{}
}
func (c SetMaskedMarkAction) ToFragment(features *environment.Features) string {
return fmt.Sprintf("--jump MARK --set-mark %#x/%#x", c.Mark, c.Mask)
}
func (c SetMaskedMarkAction) String() string {
return fmt.Sprintf("Set:%#x", c.Mark)
}
type NoTrackAction struct {
TypeNoTrack struct{}
}
func (g NoTrackAction) ToFragment(features *environment.Features) string {
return "--jump NOTRACK"
}
func (g NoTrackAction) String() string {
return "NOTRACK"
}
type SaveConnMarkAction struct {
SaveMask uint32
TypeConnMark struct{}
}
func (c SaveConnMarkAction) ToFragment(features *environment.Features) string {
var mask uint32
if c.SaveMask == 0 {
// If Mask field is ignored, save full mark.
mask = 0xffffffff
} else {
mask = c.SaveMask
}
return fmt.Sprintf("--jump CONNMARK --save-mark --mask %#x", mask)
}
func (c SaveConnMarkAction) String() string {
return fmt.Sprintf("SaveConnMarkWithMask:%#x", c.SaveMask)
}
type RestoreConnMarkAction struct {
RestoreMask uint32
TypeConnMark struct{}
}
func (c RestoreConnMarkAction) ToFragment(features *environment.Features) string {
var mask uint32
if c.RestoreMask == 0 {
// If Mask field is ignored, restore full mark.
mask = 0xffffffff
} else {
mask = c.RestoreMask
}
return fmt.Sprintf("--jump CONNMARK --restore-mark --mask %#x", mask)
}
func (c RestoreConnMarkAction) String() string {
return fmt.Sprintf("RestoreConnMarkWithMask:%#x", c.RestoreMask)
}
type SetConnMarkAction struct {
Mark uint32
Mask uint32
TypeConnMark struct{}
}
func (c SetConnMarkAction) ToFragment(features *environment.Features) string {
var mask uint32
if c.Mask == 0 {
// If Mask field is ignored, default to full mark.
mask = 0xffffffff
} else {
mask = c.Mask
}
return fmt.Sprintf("--jump CONNMARK --set-mark %#x/%#x", c.Mark, mask)
}
func (c SetConnMarkAction) String() string {
return fmt.Sprintf("SetConnMarkWithMask:%#x/%#x", c.Mark, c.Mask)
}